ffplay: Use sws_scale to scale subtitles
[ffmpeg.git] / ffplay.c
1 /*
2  * Copyright (c) 2003 Fabrice Bellard
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20
21 /**
22  * @file
23  * simple media player based on the FFmpeg libraries
24  */
25
26 #include "config.h"
27 #include <inttypes.h>
28 #include <math.h>
29 #include <limits.h>
30 #include <signal.h>
31 #include <stdint.h>
32
33 #include "libavutil/avstring.h"
34 #include "libavutil/colorspace.h"
35 #include "libavutil/eval.h"
36 #include "libavutil/mathematics.h"
37 #include "libavutil/pixdesc.h"
38 #include "libavutil/imgutils.h"
39 #include "libavutil/dict.h"
40 #include "libavutil/parseutils.h"
41 #include "libavutil/samplefmt.h"
42 #include "libavutil/avassert.h"
43 #include "libavutil/time.h"
44 #include "libavformat/avformat.h"
45 #include "libavdevice/avdevice.h"
46 #include "libswscale/swscale.h"
47 #include "libavutil/opt.h"
48 #include "libavcodec/avfft.h"
49 #include "libswresample/swresample.h"
50
51 #if CONFIG_AVFILTER
52 # include "libavfilter/avcodec.h"
53 # include "libavfilter/avfilter.h"
54 # include "libavfilter/buffersink.h"
55 # include "libavfilter/buffersrc.h"
56 #endif
57
58 #include <SDL.h>
59 #include <SDL_thread.h>
60
61 #include "cmdutils.h"
62
63 #include <assert.h>
64
65 const char program_name[] = "ffplay";
66 const int program_birth_year = 2003;
67
68 #define MAX_QUEUE_SIZE (15 * 1024 * 1024)
69 #define MIN_FRAMES 5
70
71 /* Minimum SDL audio buffer size, in samples. */
72 #define SDL_AUDIO_MIN_BUFFER_SIZE 512
73 /* Calculate actual buffer size keeping in mind not cause too frequent audio callbacks */
74 #define SDL_AUDIO_MAX_CALLBACKS_PER_SEC 30
75
76 /* no AV sync correction is done if below the minimum AV sync threshold */
77 #define AV_SYNC_THRESHOLD_MIN 0.04
78 /* AV sync correction is done if above the maximum AV sync threshold */
79 #define AV_SYNC_THRESHOLD_MAX 0.1
80 /* If a frame duration is longer than this, it will not be duplicated to compensate AV sync */
81 #define AV_SYNC_FRAMEDUP_THRESHOLD 0.1
82 /* no AV correction is done if too big error */
83 #define AV_NOSYNC_THRESHOLD 10.0
84
85 /* maximum audio speed change to get correct sync */
86 #define SAMPLE_CORRECTION_PERCENT_MAX 10
87
88 /* external clock speed adjustment constants for realtime sources based on buffer fullness */
89 #define EXTERNAL_CLOCK_SPEED_MIN  0.900
90 #define EXTERNAL_CLOCK_SPEED_MAX  1.010
91 #define EXTERNAL_CLOCK_SPEED_STEP 0.001
92
93 /* we use about AUDIO_DIFF_AVG_NB A-V differences to make the average */
94 #define AUDIO_DIFF_AVG_NB   20
95
96 /* polls for possible required screen refresh at least this often, should be less than 1/fps */
97 #define REFRESH_RATE 0.01
98
99 /* NOTE: the size must be big enough to compensate the hardware audio buffersize size */
100 /* TODO: We assume that a decoded and resampled frame fits into this buffer */
101 #define SAMPLE_ARRAY_SIZE (8 * 65536)
102
103 #define CURSOR_HIDE_DELAY 1000000
104
105 static int64_t sws_flags = SWS_BICUBIC;
106
107 typedef struct MyAVPacketList {
108     AVPacket pkt;
109     struct MyAVPacketList *next;
110     int serial;
111 } MyAVPacketList;
112
113 typedef struct PacketQueue {
114     MyAVPacketList *first_pkt, *last_pkt;
115     int nb_packets;
116     int size;
117     int abort_request;
118     int serial;
119     SDL_mutex *mutex;
120     SDL_cond *cond;
121 } PacketQueue;
122
123 #define VIDEO_PICTURE_QUEUE_SIZE 3
124 #define SUBPICTURE_QUEUE_SIZE 16
125 #define SAMPLE_QUEUE_SIZE 9
126 #define FRAME_QUEUE_SIZE FFMAX(SAMPLE_QUEUE_SIZE, FFMAX(VIDEO_PICTURE_QUEUE_SIZE, SUBPICTURE_QUEUE_SIZE))
127
128 typedef struct AudioParams {
129     int freq;
130     int channels;
131     int64_t channel_layout;
132     enum AVSampleFormat fmt;
133     int frame_size;
134     int bytes_per_sec;
135 } AudioParams;
136
137 typedef struct Clock {
138     double pts;           /* clock base */
139     double pts_drift;     /* clock base minus time at which we updated the clock */
140     double last_updated;
141     double speed;
142     int serial;           /* clock is based on a packet with this serial */
143     int paused;
144     int *queue_serial;    /* pointer to the current packet queue serial, used for obsolete clock detection */
145 } Clock;
146
147 /* Common struct for handling all types of decoded data and allocated render buffers. */
148 typedef struct Frame {
149     AVFrame *frame;
150     AVSubtitle sub;
151     int serial;
152     double pts;           /* presentation timestamp for the frame */
153     double duration;      /* estimated duration of the frame */
154     int64_t pos;          /* byte position of the frame in the input file */
155     SDL_Overlay *bmp;
156     int allocated;
157     int reallocate;
158     int width;
159     int height;
160     AVRational sar;
161 } Frame;
162
163 typedef struct FrameQueue {
164     Frame queue[FRAME_QUEUE_SIZE];
165     int rindex;
166     int windex;
167     int size;
168     int max_size;
169     int keep_last;
170     int rindex_shown;
171     SDL_mutex *mutex;
172     SDL_cond *cond;
173     PacketQueue *pktq;
174 } FrameQueue;
175
176 enum {
177     AV_SYNC_AUDIO_MASTER, /* default choice */
178     AV_SYNC_VIDEO_MASTER,
179     AV_SYNC_EXTERNAL_CLOCK, /* synchronize to an external clock */
180 };
181
182 typedef struct Decoder {
183     AVPacket pkt;
184     AVPacket pkt_temp;
185     PacketQueue *queue;
186     AVCodecContext *avctx;
187     int pkt_serial;
188     int finished;
189     int packet_pending;
190     SDL_cond *empty_queue_cond;
191     int64_t start_pts;
192     AVRational start_pts_tb;
193     int64_t next_pts;
194     AVRational next_pts_tb;
195     SDL_Thread *decoder_tid;
196 } Decoder;
197
198 typedef struct VideoState {
199     SDL_Thread *read_tid;
200     AVInputFormat *iformat;
201     int abort_request;
202     int force_refresh;
203     int paused;
204     int last_paused;
205     int queue_attachments_req;
206     int seek_req;
207     int seek_flags;
208     int64_t seek_pos;
209     int64_t seek_rel;
210     int read_pause_return;
211     AVFormatContext *ic;
212     int realtime;
213
214     Clock audclk;
215     Clock vidclk;
216     Clock extclk;
217
218     FrameQueue pictq;
219     FrameQueue subpq;
220     FrameQueue sampq;
221
222     Decoder auddec;
223     Decoder viddec;
224     Decoder subdec;
225
226     int viddec_width;
227     int viddec_height;
228
229     int audio_stream;
230
231     int av_sync_type;
232
233     double audio_clock;
234     int audio_clock_serial;
235     double audio_diff_cum; /* used for AV difference average computation */
236     double audio_diff_avg_coef;
237     double audio_diff_threshold;
238     int audio_diff_avg_count;
239     AVStream *audio_st;
240     PacketQueue audioq;
241     int audio_hw_buf_size;
242     uint8_t silence_buf[SDL_AUDIO_MIN_BUFFER_SIZE];
243     uint8_t *audio_buf;
244     uint8_t *audio_buf1;
245     unsigned int audio_buf_size; /* in bytes */
246     unsigned int audio_buf1_size;
247     int audio_buf_index; /* in bytes */
248     int audio_write_buf_size;
249     struct AudioParams audio_src;
250 #if CONFIG_AVFILTER
251     struct AudioParams audio_filter_src;
252 #endif
253     struct AudioParams audio_tgt;
254     struct SwrContext *swr_ctx;
255     int frame_drops_early;
256     int frame_drops_late;
257
258     enum ShowMode {
259         SHOW_MODE_NONE = -1, SHOW_MODE_VIDEO = 0, SHOW_MODE_WAVES, SHOW_MODE_RDFT, SHOW_MODE_NB
260     } show_mode;
261     int16_t sample_array[SAMPLE_ARRAY_SIZE];
262     int sample_array_index;
263     int last_i_start;
264     RDFTContext *rdft;
265     int rdft_bits;
266     FFTSample *rdft_data;
267     int xpos;
268     double last_vis_time;
269
270     int subtitle_stream;
271     AVStream *subtitle_st;
272     PacketQueue subtitleq;
273
274     double frame_timer;
275     double frame_last_returned_time;
276     double frame_last_filter_delay;
277     int video_stream;
278     AVStream *video_st;
279     PacketQueue videoq;
280     double max_frame_duration;      // maximum duration of a frame - above this, we consider the jump a timestamp discontinuity
281 #if !CONFIG_AVFILTER
282     struct SwsContext *img_convert_ctx;
283 #endif
284     struct SwsContext *sub_convert_ctx;
285     SDL_Rect last_display_rect;
286     int eof;
287
288     char filename[1024];
289     int width, height, xleft, ytop;
290     int step;
291
292 #if CONFIG_AVFILTER
293     int vfilter_idx;
294     AVFilterContext *in_video_filter;   // the first filter in the video chain
295     AVFilterContext *out_video_filter;  // the last filter in the video chain
296     AVFilterContext *in_audio_filter;   // the first filter in the audio chain
297     AVFilterContext *out_audio_filter;  // the last filter in the audio chain
298     AVFilterGraph *agraph;              // audio filter graph
299 #endif
300
301     int last_video_stream, last_audio_stream, last_subtitle_stream;
302
303     SDL_cond *continue_read_thread;
304 } VideoState;
305
306 /* options specified by the user */
307 static AVInputFormat *file_iformat;
308 static const char *input_filename;
309 static const char *window_title;
310 static int fs_screen_width;
311 static int fs_screen_height;
312 static int default_width  = 640;
313 static int default_height = 480;
314 static int screen_width  = 0;
315 static int screen_height = 0;
316 static int audio_disable;
317 static int video_disable;
318 static int subtitle_disable;
319 static const char* wanted_stream_spec[AVMEDIA_TYPE_NB] = {0};
320 static int seek_by_bytes = -1;
321 static int display_disable;
322 static int show_status = 1;
323 static int av_sync_type = AV_SYNC_AUDIO_MASTER;
324 static int64_t start_time = AV_NOPTS_VALUE;
325 static int64_t duration = AV_NOPTS_VALUE;
326 static int fast = 0;
327 static int genpts = 0;
328 static int lowres = 0;
329 static int decoder_reorder_pts = -1;
330 static int autoexit;
331 static int exit_on_keydown;
332 static int exit_on_mousedown;
333 static int loop = 1;
334 static int framedrop = -1;
335 static int infinite_buffer = -1;
336 static enum ShowMode show_mode = SHOW_MODE_NONE;
337 static const char *audio_codec_name;
338 static const char *subtitle_codec_name;
339 static const char *video_codec_name;
340 double rdftspeed = 0.02;
341 static int64_t cursor_last_shown;
342 static int cursor_hidden = 0;
343 #if CONFIG_AVFILTER
344 static const char **vfilters_list = NULL;
345 static int nb_vfilters = 0;
346 static char *afilters = NULL;
347 #endif
348 static int autorotate = 1;
349
350 /* current context */
351 static int is_full_screen;
352 static int64_t audio_callback_time;
353
354 static AVPacket flush_pkt;
355
356 #define FF_ALLOC_EVENT   (SDL_USEREVENT)
357 #define FF_QUIT_EVENT    (SDL_USEREVENT + 2)
358
359 static SDL_Surface *screen;
360
361 #if CONFIG_AVFILTER
362 static int opt_add_vfilter(void *optctx, const char *opt, const char *arg)
363 {
364     GROW_ARRAY(vfilters_list, nb_vfilters);
365     vfilters_list[nb_vfilters - 1] = arg;
366     return 0;
367 }
368 #endif
369
370 static inline
371 int cmp_audio_fmts(enum AVSampleFormat fmt1, int64_t channel_count1,
372                    enum AVSampleFormat fmt2, int64_t channel_count2)
373 {
374     /* If channel count == 1, planar and non-planar formats are the same */
375     if (channel_count1 == 1 && channel_count2 == 1)
376         return av_get_packed_sample_fmt(fmt1) != av_get_packed_sample_fmt(fmt2);
377     else
378         return channel_count1 != channel_count2 || fmt1 != fmt2;
379 }
380
381 static inline
382 int64_t get_valid_channel_layout(int64_t channel_layout, int channels)
383 {
384     if (channel_layout && av_get_channel_layout_nb_channels(channel_layout) == channels)
385         return channel_layout;
386     else
387         return 0;
388 }
389
390 static void free_picture(Frame *vp);
391
392 static int packet_queue_put_private(PacketQueue *q, AVPacket *pkt)
393 {
394     MyAVPacketList *pkt1;
395
396     if (q->abort_request)
397        return -1;
398
399     pkt1 = av_malloc(sizeof(MyAVPacketList));
400     if (!pkt1)
401         return -1;
402     pkt1->pkt = *pkt;
403     pkt1->next = NULL;
404     if (pkt == &flush_pkt)
405         q->serial++;
406     pkt1->serial = q->serial;
407
408     if (!q->last_pkt)
409         q->first_pkt = pkt1;
410     else
411         q->last_pkt->next = pkt1;
412     q->last_pkt = pkt1;
413     q->nb_packets++;
414     q->size += pkt1->pkt.size + sizeof(*pkt1);
415     /* XXX: should duplicate packet data in DV case */
416     SDL_CondSignal(q->cond);
417     return 0;
418 }
419
420 static int packet_queue_put(PacketQueue *q, AVPacket *pkt)
421 {
422     int ret;
423
424     /* duplicate the packet */
425     if (pkt != &flush_pkt && av_dup_packet(pkt) < 0)
426         return -1;
427
428     SDL_LockMutex(q->mutex);
429     ret = packet_queue_put_private(q, pkt);
430     SDL_UnlockMutex(q->mutex);
431
432     if (pkt != &flush_pkt && ret < 0)
433         av_free_packet(pkt);
434
435     return ret;
436 }
437
438 static int packet_queue_put_nullpacket(PacketQueue *q, int stream_index)
439 {
440     AVPacket pkt1, *pkt = &pkt1;
441     av_init_packet(pkt);
442     pkt->data = NULL;
443     pkt->size = 0;
444     pkt->stream_index = stream_index;
445     return packet_queue_put(q, pkt);
446 }
447
448 /* packet queue handling */
449 static void packet_queue_init(PacketQueue *q)
450 {
451     memset(q, 0, sizeof(PacketQueue));
452     q->mutex = SDL_CreateMutex();
453     q->cond = SDL_CreateCond();
454     q->abort_request = 1;
455 }
456
457 static void packet_queue_flush(PacketQueue *q)
458 {
459     MyAVPacketList *pkt, *pkt1;
460
461     SDL_LockMutex(q->mutex);
462     for (pkt = q->first_pkt; pkt; pkt = pkt1) {
463         pkt1 = pkt->next;
464         av_free_packet(&pkt->pkt);
465         av_freep(&pkt);
466     }
467     q->last_pkt = NULL;
468     q->first_pkt = NULL;
469     q->nb_packets = 0;
470     q->size = 0;
471     SDL_UnlockMutex(q->mutex);
472 }
473
474 static void packet_queue_destroy(PacketQueue *q)
475 {
476     packet_queue_flush(q);
477     SDL_DestroyMutex(q->mutex);
478     SDL_DestroyCond(q->cond);
479 }
480
481 static void packet_queue_abort(PacketQueue *q)
482 {
483     SDL_LockMutex(q->mutex);
484
485     q->abort_request = 1;
486
487     SDL_CondSignal(q->cond);
488
489     SDL_UnlockMutex(q->mutex);
490 }
491
492 static void packet_queue_start(PacketQueue *q)
493 {
494     SDL_LockMutex(q->mutex);
495     q->abort_request = 0;
496     packet_queue_put_private(q, &flush_pkt);
497     SDL_UnlockMutex(q->mutex);
498 }
499
500 /* return < 0 if aborted, 0 if no packet and > 0 if packet.  */
501 static int packet_queue_get(PacketQueue *q, AVPacket *pkt, int block, int *serial)
502 {
503     MyAVPacketList *pkt1;
504     int ret;
505
506     SDL_LockMutex(q->mutex);
507
508     for (;;) {
509         if (q->abort_request) {
510             ret = -1;
511             break;
512         }
513
514         pkt1 = q->first_pkt;
515         if (pkt1) {
516             q->first_pkt = pkt1->next;
517             if (!q->first_pkt)
518                 q->last_pkt = NULL;
519             q->nb_packets--;
520             q->size -= pkt1->pkt.size + sizeof(*pkt1);
521             *pkt = pkt1->pkt;
522             if (serial)
523                 *serial = pkt1->serial;
524             av_free(pkt1);
525             ret = 1;
526             break;
527         } else if (!block) {
528             ret = 0;
529             break;
530         } else {
531             SDL_CondWait(q->cond, q->mutex);
532         }
533     }
534     SDL_UnlockMutex(q->mutex);
535     return ret;
536 }
537
538 static void decoder_init(Decoder *d, AVCodecContext *avctx, PacketQueue *queue, SDL_cond *empty_queue_cond) {
539     memset(d, 0, sizeof(Decoder));
540     d->avctx = avctx;
541     d->queue = queue;
542     d->empty_queue_cond = empty_queue_cond;
543     d->start_pts = AV_NOPTS_VALUE;
544 }
545
546 static int decoder_decode_frame(Decoder *d, AVFrame *frame, AVSubtitle *sub) {
547     int got_frame = 0;
548
549     do {
550         int ret = -1;
551
552         if (d->queue->abort_request)
553             return -1;
554
555         if (!d->packet_pending || d->queue->serial != d->pkt_serial) {
556             AVPacket pkt;
557             do {
558                 if (d->queue->nb_packets == 0)
559                     SDL_CondSignal(d->empty_queue_cond);
560                 if (packet_queue_get(d->queue, &pkt, 1, &d->pkt_serial) < 0)
561                     return -1;
562                 if (pkt.data == flush_pkt.data) {
563                     avcodec_flush_buffers(d->avctx);
564                     d->finished = 0;
565                     d->next_pts = d->start_pts;
566                     d->next_pts_tb = d->start_pts_tb;
567                 }
568             } while (pkt.data == flush_pkt.data || d->queue->serial != d->pkt_serial);
569             av_free_packet(&d->pkt);
570             d->pkt_temp = d->pkt = pkt;
571             d->packet_pending = 1;
572         }
573
574         switch (d->avctx->codec_type) {
575             case AVMEDIA_TYPE_VIDEO:
576                 ret = avcodec_decode_video2(d->avctx, frame, &got_frame, &d->pkt_temp);
577                 if (got_frame) {
578                     if (decoder_reorder_pts == -1) {
579                         frame->pts = av_frame_get_best_effort_timestamp(frame);
580                     } else if (decoder_reorder_pts) {
581                         frame->pts = frame->pkt_pts;
582                     } else {
583                         frame->pts = frame->pkt_dts;
584                     }
585                 }
586                 break;
587             case AVMEDIA_TYPE_AUDIO:
588                 ret = avcodec_decode_audio4(d->avctx, frame, &got_frame, &d->pkt_temp);
589                 if (got_frame) {
590                     AVRational tb = (AVRational){1, frame->sample_rate};
591                     if (frame->pts != AV_NOPTS_VALUE)
592                         frame->pts = av_rescale_q(frame->pts, d->avctx->time_base, tb);
593                     else if (frame->pkt_pts != AV_NOPTS_VALUE)
594                         frame->pts = av_rescale_q(frame->pkt_pts, av_codec_get_pkt_timebase(d->avctx), tb);
595                     else if (d->next_pts != AV_NOPTS_VALUE)
596                         frame->pts = av_rescale_q(d->next_pts, d->next_pts_tb, tb);
597                     if (frame->pts != AV_NOPTS_VALUE) {
598                         d->next_pts = frame->pts + frame->nb_samples;
599                         d->next_pts_tb = tb;
600                     }
601                 }
602                 break;
603             case AVMEDIA_TYPE_SUBTITLE:
604                 ret = avcodec_decode_subtitle2(d->avctx, sub, &got_frame, &d->pkt_temp);
605                 break;
606         }
607
608         if (ret < 0) {
609             d->packet_pending = 0;
610         } else {
611             d->pkt_temp.dts =
612             d->pkt_temp.pts = AV_NOPTS_VALUE;
613             if (d->pkt_temp.data) {
614                 if (d->avctx->codec_type != AVMEDIA_TYPE_AUDIO)
615                     ret = d->pkt_temp.size;
616                 d->pkt_temp.data += ret;
617                 d->pkt_temp.size -= ret;
618                 if (d->pkt_temp.size <= 0)
619                     d->packet_pending = 0;
620             } else {
621                 if (!got_frame) {
622                     d->packet_pending = 0;
623                     d->finished = d->pkt_serial;
624                 }
625             }
626         }
627     } while (!got_frame && !d->finished);
628
629     return got_frame;
630 }
631
632 static void decoder_destroy(Decoder *d) {
633     av_free_packet(&d->pkt);
634 }
635
636 static void frame_queue_unref_item(Frame *vp)
637 {
638     av_frame_unref(vp->frame);
639     avsubtitle_free(&vp->sub);
640 }
641
642 static int frame_queue_init(FrameQueue *f, PacketQueue *pktq, int max_size, int keep_last)
643 {
644     int i;
645     memset(f, 0, sizeof(FrameQueue));
646     if (!(f->mutex = SDL_CreateMutex()))
647         return AVERROR(ENOMEM);
648     if (!(f->cond = SDL_CreateCond()))
649         return AVERROR(ENOMEM);
650     f->pktq = pktq;
651     f->max_size = FFMIN(max_size, FRAME_QUEUE_SIZE);
652     f->keep_last = !!keep_last;
653     for (i = 0; i < f->max_size; i++)
654         if (!(f->queue[i].frame = av_frame_alloc()))
655             return AVERROR(ENOMEM);
656     return 0;
657 }
658
659 static void frame_queue_destory(FrameQueue *f)
660 {
661     int i;
662     for (i = 0; i < f->max_size; i++) {
663         Frame *vp = &f->queue[i];
664         frame_queue_unref_item(vp);
665         av_frame_free(&vp->frame);
666         free_picture(vp);
667     }
668     SDL_DestroyMutex(f->mutex);
669     SDL_DestroyCond(f->cond);
670 }
671
672 static void frame_queue_signal(FrameQueue *f)
673 {
674     SDL_LockMutex(f->mutex);
675     SDL_CondSignal(f->cond);
676     SDL_UnlockMutex(f->mutex);
677 }
678
679 static Frame *frame_queue_peek(FrameQueue *f)
680 {
681     return &f->queue[(f->rindex + f->rindex_shown) % f->max_size];
682 }
683
684 static Frame *frame_queue_peek_next(FrameQueue *f)
685 {
686     return &f->queue[(f->rindex + f->rindex_shown + 1) % f->max_size];
687 }
688
689 static Frame *frame_queue_peek_last(FrameQueue *f)
690 {
691     return &f->queue[f->rindex];
692 }
693
694 static Frame *frame_queue_peek_writable(FrameQueue *f)
695 {
696     /* wait until we have space to put a new frame */
697     SDL_LockMutex(f->mutex);
698     while (f->size >= f->max_size &&
699            !f->pktq->abort_request) {
700         SDL_CondWait(f->cond, f->mutex);
701     }
702     SDL_UnlockMutex(f->mutex);
703
704     if (f->pktq->abort_request)
705         return NULL;
706
707     return &f->queue[f->windex];
708 }
709
710 static Frame *frame_queue_peek_readable(FrameQueue *f)
711 {
712     /* wait until we have a readable a new frame */
713     SDL_LockMutex(f->mutex);
714     while (f->size - f->rindex_shown <= 0 &&
715            !f->pktq->abort_request) {
716         SDL_CondWait(f->cond, f->mutex);
717     }
718     SDL_UnlockMutex(f->mutex);
719
720     if (f->pktq->abort_request)
721         return NULL;
722
723     return &f->queue[(f->rindex + f->rindex_shown) % f->max_size];
724 }
725
726 static void frame_queue_push(FrameQueue *f)
727 {
728     if (++f->windex == f->max_size)
729         f->windex = 0;
730     SDL_LockMutex(f->mutex);
731     f->size++;
732     SDL_CondSignal(f->cond);
733     SDL_UnlockMutex(f->mutex);
734 }
735
736 static void frame_queue_next(FrameQueue *f)
737 {
738     if (f->keep_last && !f->rindex_shown) {
739         f->rindex_shown = 1;
740         return;
741     }
742     frame_queue_unref_item(&f->queue[f->rindex]);
743     if (++f->rindex == f->max_size)
744         f->rindex = 0;
745     SDL_LockMutex(f->mutex);
746     f->size--;
747     SDL_CondSignal(f->cond);
748     SDL_UnlockMutex(f->mutex);
749 }
750
751 /* jump back to the previous frame if available by resetting rindex_shown */
752 static int frame_queue_prev(FrameQueue *f)
753 {
754     int ret = f->rindex_shown;
755     f->rindex_shown = 0;
756     return ret;
757 }
758
759 /* return the number of undisplayed frames in the queue */
760 static int frame_queue_nb_remaining(FrameQueue *f)
761 {
762     return f->size - f->rindex_shown;
763 }
764
765 /* return last shown position */
766 static int64_t frame_queue_last_pos(FrameQueue *f)
767 {
768     Frame *fp = &f->queue[f->rindex];
769     if (f->rindex_shown && fp->serial == f->pktq->serial)
770         return fp->pos;
771     else
772         return -1;
773 }
774
775 static void decoder_abort(Decoder *d, FrameQueue *fq)
776 {
777     packet_queue_abort(d->queue);
778     frame_queue_signal(fq);
779     SDL_WaitThread(d->decoder_tid, NULL);
780     d->decoder_tid = NULL;
781     packet_queue_flush(d->queue);
782 }
783
784 static inline void fill_rectangle(SDL_Surface *screen,
785                                   int x, int y, int w, int h, int color, int update)
786 {
787     SDL_Rect rect;
788     rect.x = x;
789     rect.y = y;
790     rect.w = w;
791     rect.h = h;
792     SDL_FillRect(screen, &rect, color);
793     if (update && w > 0 && h > 0)
794         SDL_UpdateRect(screen, x, y, w, h);
795 }
796
797 /* draw only the border of a rectangle */
798 static void fill_border(int xleft, int ytop, int width, int height, int x, int y, int w, int h, int color, int update)
799 {
800     int w1, w2, h1, h2;
801
802     /* fill the background */
803     w1 = x;
804     if (w1 < 0)
805         w1 = 0;
806     w2 = width - (x + w);
807     if (w2 < 0)
808         w2 = 0;
809     h1 = y;
810     if (h1 < 0)
811         h1 = 0;
812     h2 = height - (y + h);
813     if (h2 < 0)
814         h2 = 0;
815     fill_rectangle(screen,
816                    xleft, ytop,
817                    w1, height,
818                    color, update);
819     fill_rectangle(screen,
820                    xleft + width - w2, ytop,
821                    w2, height,
822                    color, update);
823     fill_rectangle(screen,
824                    xleft + w1, ytop,
825                    width - w1 - w2, h1,
826                    color, update);
827     fill_rectangle(screen,
828                    xleft + w1, ytop + height - h2,
829                    width - w1 - w2, h2,
830                    color, update);
831 }
832
833 #define ALPHA_BLEND(a, oldp, newp, s)\
834 ((((oldp << s) * (255 - (a))) + (newp * (a))) / (255 << s))
835
836
837
838 #define BPP 1
839
840 static void blend_subrect(AVPicture *dst, const AVSubtitleRect *rect, int imgw, int imgh)
841 {
842     int x, y, Y, U, V, A;
843     uint8_t *lum, *cb, *cr;
844     int dstx, dsty, dstw, dsth;
845     const AVPicture *src = &rect->pict;
846
847     dstw = av_clip(rect->w, 0, imgw);
848     dsth = av_clip(rect->h, 0, imgh);
849     dstx = av_clip(rect->x, 0, imgw - dstw);
850     dsty = av_clip(rect->y, 0, imgh - dsth);
851     lum = dst->data[0] + dstx + dsty * dst->linesize[0];
852     cb  = dst->data[1] + dstx/2 + (dsty >> 1) * dst->linesize[1];
853     cr  = dst->data[2] + dstx/2 + (dsty >> 1) * dst->linesize[2];
854
855     for (y = 0; y<dsth; y++) {
856         for (x = 0; x<dstw; x++) {
857             Y = src->data[0][x + y*src->linesize[0]];
858             A = src->data[3][x + y*src->linesize[3]];
859             lum[0] = ALPHA_BLEND(A, lum[0], Y, 0);
860             lum++;
861         }
862         lum += dst->linesize[0] - dstw;
863     }
864
865     for (y = 0; y<dsth/2; y++) {
866         for (x = 0; x<dstw/2; x++) {
867             U = src->data[1][x + y*src->linesize[1]];
868             V = src->data[2][x + y*src->linesize[2]];
869             A = src->data[3][2*x     +  2*y   *src->linesize[3]]
870               + src->data[3][2*x + 1 +  2*y   *src->linesize[3]]
871               + src->data[3][2*x + 1 + (2*y+1)*src->linesize[3]]
872               + src->data[3][2*x     + (2*y+1)*src->linesize[3]];
873             cb[0] = ALPHA_BLEND(A>>2, cb[0], U, 0);
874             cr[0] = ALPHA_BLEND(A>>2, cr[0], V, 0);
875             cb++;
876             cr++;
877         }
878         cb += dst->linesize[1] - dstw/2;
879         cr += dst->linesize[2] - dstw/2;
880     }
881 }
882
883 static void free_picture(Frame *vp)
884 {
885      if (vp->bmp) {
886          SDL_FreeYUVOverlay(vp->bmp);
887          vp->bmp = NULL;
888      }
889 }
890
891 static void calculate_display_rect(SDL_Rect *rect,
892                                    int scr_xleft, int scr_ytop, int scr_width, int scr_height,
893                                    int pic_width, int pic_height, AVRational pic_sar)
894 {
895     float aspect_ratio;
896     int width, height, x, y;
897
898     if (pic_sar.num == 0)
899         aspect_ratio = 0;
900     else
901         aspect_ratio = av_q2d(pic_sar);
902
903     if (aspect_ratio <= 0.0)
904         aspect_ratio = 1.0;
905     aspect_ratio *= (float)pic_width / (float)pic_height;
906
907     /* XXX: we suppose the screen has a 1.0 pixel ratio */
908     height = scr_height;
909     width = ((int)rint(height * aspect_ratio)) & ~1;
910     if (width > scr_width) {
911         width = scr_width;
912         height = ((int)rint(width / aspect_ratio)) & ~1;
913     }
914     x = (scr_width - width) / 2;
915     y = (scr_height - height) / 2;
916     rect->x = scr_xleft + x;
917     rect->y = scr_ytop  + y;
918     rect->w = FFMAX(width,  1);
919     rect->h = FFMAX(height, 1);
920 }
921
922 static void video_image_display(VideoState *is)
923 {
924     Frame *vp;
925     Frame *sp;
926     AVPicture pict;
927     SDL_Rect rect;
928     int i;
929
930     vp = frame_queue_peek(&is->pictq);
931     if (vp->bmp) {
932         if (is->subtitle_st) {
933             if (frame_queue_nb_remaining(&is->subpq) > 0) {
934                 sp = frame_queue_peek(&is->subpq);
935
936                 if (vp->pts >= sp->pts + ((float) sp->sub.start_display_time / 1000)) {
937                     SDL_LockYUVOverlay (vp->bmp);
938
939                     pict.data[0] = vp->bmp->pixels[0];
940                     pict.data[1] = vp->bmp->pixels[2];
941                     pict.data[2] = vp->bmp->pixels[1];
942
943                     pict.linesize[0] = vp->bmp->pitches[0];
944                     pict.linesize[1] = vp->bmp->pitches[2];
945                     pict.linesize[2] = vp->bmp->pitches[1];
946
947                     for (i = 0; i < sp->sub.num_rects; i++)
948                         blend_subrect(&pict, sp->sub.rects[i],
949                                       vp->bmp->w, vp->bmp->h);
950
951                     SDL_UnlockYUVOverlay (vp->bmp);
952                 }
953             }
954         }
955
956         calculate_display_rect(&rect, is->xleft, is->ytop, is->width, is->height, vp->width, vp->height, vp->sar);
957
958         SDL_DisplayYUVOverlay(vp->bmp, &rect);
959
960         if (rect.x != is->last_display_rect.x || rect.y != is->last_display_rect.y || rect.w != is->last_display_rect.w || rect.h != is->last_display_rect.h || is->force_refresh) {
961             int bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
962             fill_border(is->xleft, is->ytop, is->width, is->height, rect.x, rect.y, rect.w, rect.h, bgcolor, 1);
963             is->last_display_rect = rect;
964         }
965     }
966 }
967
968 static inline int compute_mod(int a, int b)
969 {
970     return a < 0 ? a%b + b : a%b;
971 }
972
973 static void video_audio_display(VideoState *s)
974 {
975     int i, i_start, x, y1, y, ys, delay, n, nb_display_channels;
976     int ch, channels, h, h2, bgcolor, fgcolor;
977     int64_t time_diff;
978     int rdft_bits, nb_freq;
979
980     for (rdft_bits = 1; (1 << rdft_bits) < 2 * s->height; rdft_bits++)
981         ;
982     nb_freq = 1 << (rdft_bits - 1);
983
984     /* compute display index : center on currently output samples */
985     channels = s->audio_tgt.channels;
986     nb_display_channels = channels;
987     if (!s->paused) {
988         int data_used= s->show_mode == SHOW_MODE_WAVES ? s->width : (2*nb_freq);
989         n = 2 * channels;
990         delay = s->audio_write_buf_size;
991         delay /= n;
992
993         /* to be more precise, we take into account the time spent since
994            the last buffer computation */
995         if (audio_callback_time) {
996             time_diff = av_gettime_relative() - audio_callback_time;
997             delay -= (time_diff * s->audio_tgt.freq) / 1000000;
998         }
999
1000         delay += 2 * data_used;
1001         if (delay < data_used)
1002             delay = data_used;
1003
1004         i_start= x = compute_mod(s->sample_array_index - delay * channels, SAMPLE_ARRAY_SIZE);
1005         if (s->show_mode == SHOW_MODE_WAVES) {
1006             h = INT_MIN;
1007             for (i = 0; i < 1000; i += channels) {
1008                 int idx = (SAMPLE_ARRAY_SIZE + x - i) % SAMPLE_ARRAY_SIZE;
1009                 int a = s->sample_array[idx];
1010                 int b = s->sample_array[(idx + 4 * channels) % SAMPLE_ARRAY_SIZE];
1011                 int c = s->sample_array[(idx + 5 * channels) % SAMPLE_ARRAY_SIZE];
1012                 int d = s->sample_array[(idx + 9 * channels) % SAMPLE_ARRAY_SIZE];
1013                 int score = a - d;
1014                 if (h < score && (b ^ c) < 0) {
1015                     h = score;
1016                     i_start = idx;
1017                 }
1018             }
1019         }
1020
1021         s->last_i_start = i_start;
1022     } else {
1023         i_start = s->last_i_start;
1024     }
1025
1026     bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
1027     if (s->show_mode == SHOW_MODE_WAVES) {
1028         fill_rectangle(screen,
1029                        s->xleft, s->ytop, s->width, s->height,
1030                        bgcolor, 0);
1031
1032         fgcolor = SDL_MapRGB(screen->format, 0xff, 0xff, 0xff);
1033
1034         /* total height for one channel */
1035         h = s->height / nb_display_channels;
1036         /* graph height / 2 */
1037         h2 = (h * 9) / 20;
1038         for (ch = 0; ch < nb_display_channels; ch++) {
1039             i = i_start + ch;
1040             y1 = s->ytop + ch * h + (h / 2); /* position of center line */
1041             for (x = 0; x < s->width; x++) {
1042                 y = (s->sample_array[i] * h2) >> 15;
1043                 if (y < 0) {
1044                     y = -y;
1045                     ys = y1 - y;
1046                 } else {
1047                     ys = y1;
1048                 }
1049                 fill_rectangle(screen,
1050                                s->xleft + x, ys, 1, y,
1051                                fgcolor, 0);
1052                 i += channels;
1053                 if (i >= SAMPLE_ARRAY_SIZE)
1054                     i -= SAMPLE_ARRAY_SIZE;
1055             }
1056         }
1057
1058         fgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0xff);
1059
1060         for (ch = 1; ch < nb_display_channels; ch++) {
1061             y = s->ytop + ch * h;
1062             fill_rectangle(screen,
1063                            s->xleft, y, s->width, 1,
1064                            fgcolor, 0);
1065         }
1066         SDL_UpdateRect(screen, s->xleft, s->ytop, s->width, s->height);
1067     } else {
1068         nb_display_channels= FFMIN(nb_display_channels, 2);
1069         if (rdft_bits != s->rdft_bits) {
1070             av_rdft_end(s->rdft);
1071             av_free(s->rdft_data);
1072             s->rdft = av_rdft_init(rdft_bits, DFT_R2C);
1073             s->rdft_bits = rdft_bits;
1074             s->rdft_data = av_malloc_array(nb_freq, 4 *sizeof(*s->rdft_data));
1075         }
1076         if (!s->rdft || !s->rdft_data){
1077             av_log(NULL, AV_LOG_ERROR, "Failed to allocate buffers for RDFT, switching to waves display\n");
1078             s->show_mode = SHOW_MODE_WAVES;
1079         } else {
1080             FFTSample *data[2];
1081             for (ch = 0; ch < nb_display_channels; ch++) {
1082                 data[ch] = s->rdft_data + 2 * nb_freq * ch;
1083                 i = i_start + ch;
1084                 for (x = 0; x < 2 * nb_freq; x++) {
1085                     double w = (x-nb_freq) * (1.0 / nb_freq);
1086                     data[ch][x] = s->sample_array[i] * (1.0 - w * w);
1087                     i += channels;
1088                     if (i >= SAMPLE_ARRAY_SIZE)
1089                         i -= SAMPLE_ARRAY_SIZE;
1090                 }
1091                 av_rdft_calc(s->rdft, data[ch]);
1092             }
1093             /* Least efficient way to do this, we should of course
1094              * directly access it but it is more than fast enough. */
1095             for (y = 0; y < s->height; y++) {
1096                 double w = 1 / sqrt(nb_freq);
1097                 int a = sqrt(w * sqrt(data[0][2 * y + 0] * data[0][2 * y + 0] + data[0][2 * y + 1] * data[0][2 * y + 1]));
1098                 int b = (nb_display_channels == 2 ) ? sqrt(w * sqrt(data[1][2 * y + 0] * data[1][2 * y + 0]
1099                        + data[1][2 * y + 1] * data[1][2 * y + 1])) : a;
1100                 a = FFMIN(a, 255);
1101                 b = FFMIN(b, 255);
1102                 fgcolor = SDL_MapRGB(screen->format, a, b, (a + b) / 2);
1103
1104                 fill_rectangle(screen,
1105                             s->xpos, s->height-y, 1, 1,
1106                             fgcolor, 0);
1107             }
1108         }
1109         SDL_UpdateRect(screen, s->xpos, s->ytop, 1, s->height);
1110         if (!s->paused)
1111             s->xpos++;
1112         if (s->xpos >= s->width)
1113             s->xpos= s->xleft;
1114     }
1115 }
1116
1117 static void stream_close(VideoState *is)
1118 {
1119     /* XXX: use a special url_shutdown call to abort parse cleanly */
1120     is->abort_request = 1;
1121     SDL_WaitThread(is->read_tid, NULL);
1122     packet_queue_destroy(&is->videoq);
1123     packet_queue_destroy(&is->audioq);
1124     packet_queue_destroy(&is->subtitleq);
1125
1126     /* free all pictures */
1127     frame_queue_destory(&is->pictq);
1128     frame_queue_destory(&is->sampq);
1129     frame_queue_destory(&is->subpq);
1130     SDL_DestroyCond(is->continue_read_thread);
1131 #if !CONFIG_AVFILTER
1132     sws_freeContext(is->img_convert_ctx);
1133 #endif
1134     sws_freeContext(is->sub_convert_ctx);
1135     av_free(is);
1136 }
1137
1138 static void do_exit(VideoState *is)
1139 {
1140     if (is) {
1141         stream_close(is);
1142     }
1143     av_lockmgr_register(NULL);
1144     uninit_opts();
1145 #if CONFIG_AVFILTER
1146     av_freep(&vfilters_list);
1147 #endif
1148     avformat_network_deinit();
1149     if (show_status)
1150         printf("\n");
1151     SDL_Quit();
1152     av_log(NULL, AV_LOG_QUIET, "%s", "");
1153     exit(0);
1154 }
1155
1156 static void sigterm_handler(int sig)
1157 {
1158     exit(123);
1159 }
1160
1161 static void set_default_window_size(int width, int height, AVRational sar)
1162 {
1163     SDL_Rect rect;
1164     calculate_display_rect(&rect, 0, 0, INT_MAX, height, width, height, sar);
1165     default_width  = rect.w;
1166     default_height = rect.h;
1167 }
1168
1169 static int video_open(VideoState *is, int force_set_video_mode, Frame *vp)
1170 {
1171     int flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL;
1172     int w,h;
1173
1174     if (is_full_screen) flags |= SDL_FULLSCREEN;
1175     else                flags |= SDL_RESIZABLE;
1176
1177     if (vp && vp->width)
1178         set_default_window_size(vp->width, vp->height, vp->sar);
1179
1180     if (is_full_screen && fs_screen_width) {
1181         w = fs_screen_width;
1182         h = fs_screen_height;
1183     } else if (!is_full_screen && screen_width) {
1184         w = screen_width;
1185         h = screen_height;
1186     } else {
1187         w = default_width;
1188         h = default_height;
1189     }
1190     w = FFMIN(16383, w);
1191     if (screen && is->width == screen->w && screen->w == w
1192        && is->height== screen->h && screen->h == h && !force_set_video_mode)
1193         return 0;
1194     screen = SDL_SetVideoMode(w, h, 0, flags);
1195     if (!screen) {
1196         av_log(NULL, AV_LOG_FATAL, "SDL: could not set video mode - exiting\n");
1197         do_exit(is);
1198     }
1199     if (!window_title)
1200         window_title = input_filename;
1201     SDL_WM_SetCaption(window_title, window_title);
1202
1203     is->width  = screen->w;
1204     is->height = screen->h;
1205
1206     return 0;
1207 }
1208
1209 /* display the current picture, if any */
1210 static void video_display(VideoState *is)
1211 {
1212     if (!screen)
1213         video_open(is, 0, NULL);
1214     if (is->audio_st && is->show_mode != SHOW_MODE_VIDEO)
1215         video_audio_display(is);
1216     else if (is->video_st)
1217         video_image_display(is);
1218 }
1219
1220 static double get_clock(Clock *c)
1221 {
1222     if (*c->queue_serial != c->serial)
1223         return NAN;
1224     if (c->paused) {
1225         return c->pts;
1226     } else {
1227         double time = av_gettime_relative() / 1000000.0;
1228         return c->pts_drift + time - (time - c->last_updated) * (1.0 - c->speed);
1229     }
1230 }
1231
1232 static void set_clock_at(Clock *c, double pts, int serial, double time)
1233 {
1234     c->pts = pts;
1235     c->last_updated = time;
1236     c->pts_drift = c->pts - time;
1237     c->serial = serial;
1238 }
1239
1240 static void set_clock(Clock *c, double pts, int serial)
1241 {
1242     double time = av_gettime_relative() / 1000000.0;
1243     set_clock_at(c, pts, serial, time);
1244 }
1245
1246 static void set_clock_speed(Clock *c, double speed)
1247 {
1248     set_clock(c, get_clock(c), c->serial);
1249     c->speed = speed;
1250 }
1251
1252 static void init_clock(Clock *c, int *queue_serial)
1253 {
1254     c->speed = 1.0;
1255     c->paused = 0;
1256     c->queue_serial = queue_serial;
1257     set_clock(c, NAN, -1);
1258 }
1259
1260 static void sync_clock_to_slave(Clock *c, Clock *slave)
1261 {
1262     double clock = get_clock(c);
1263     double slave_clock = get_clock(slave);
1264     if (!isnan(slave_clock) && (isnan(clock) || fabs(clock - slave_clock) > AV_NOSYNC_THRESHOLD))
1265         set_clock(c, slave_clock, slave->serial);
1266 }
1267
1268 static int get_master_sync_type(VideoState *is) {
1269     if (is->av_sync_type == AV_SYNC_VIDEO_MASTER) {
1270         if (is->video_st)
1271             return AV_SYNC_VIDEO_MASTER;
1272         else
1273             return AV_SYNC_AUDIO_MASTER;
1274     } else if (is->av_sync_type == AV_SYNC_AUDIO_MASTER) {
1275         if (is->audio_st)
1276             return AV_SYNC_AUDIO_MASTER;
1277         else
1278             return AV_SYNC_EXTERNAL_CLOCK;
1279     } else {
1280         return AV_SYNC_EXTERNAL_CLOCK;
1281     }
1282 }
1283
1284 /* get the current master clock value */
1285 static double get_master_clock(VideoState *is)
1286 {
1287     double val;
1288
1289     switch (get_master_sync_type(is)) {
1290         case AV_SYNC_VIDEO_MASTER:
1291             val = get_clock(&is->vidclk);
1292             break;
1293         case AV_SYNC_AUDIO_MASTER:
1294             val = get_clock(&is->audclk);
1295             break;
1296         default:
1297             val = get_clock(&is->extclk);
1298             break;
1299     }
1300     return val;
1301 }
1302
1303 static void check_external_clock_speed(VideoState *is) {
1304    if (is->video_stream >= 0 && is->videoq.nb_packets <= MIN_FRAMES / 2 ||
1305        is->audio_stream >= 0 && is->audioq.nb_packets <= MIN_FRAMES / 2) {
1306        set_clock_speed(&is->extclk, FFMAX(EXTERNAL_CLOCK_SPEED_MIN, is->extclk.speed - EXTERNAL_CLOCK_SPEED_STEP));
1307    } else if ((is->video_stream < 0 || is->videoq.nb_packets > MIN_FRAMES * 2) &&
1308               (is->audio_stream < 0 || is->audioq.nb_packets > MIN_FRAMES * 2)) {
1309        set_clock_speed(&is->extclk, FFMIN(EXTERNAL_CLOCK_SPEED_MAX, is->extclk.speed + EXTERNAL_CLOCK_SPEED_STEP));
1310    } else {
1311        double speed = is->extclk.speed;
1312        if (speed != 1.0)
1313            set_clock_speed(&is->extclk, speed + EXTERNAL_CLOCK_SPEED_STEP * (1.0 - speed) / fabs(1.0 - speed));
1314    }
1315 }
1316
1317 /* seek in the stream */
1318 static void stream_seek(VideoState *is, int64_t pos, int64_t rel, int seek_by_bytes)
1319 {
1320     if (!is->seek_req) {
1321         is->seek_pos = pos;
1322         is->seek_rel = rel;
1323         is->seek_flags &= ~AVSEEK_FLAG_BYTE;
1324         if (seek_by_bytes)
1325             is->seek_flags |= AVSEEK_FLAG_BYTE;
1326         is->seek_req = 1;
1327         SDL_CondSignal(is->continue_read_thread);
1328     }
1329 }
1330
1331 /* pause or resume the video */
1332 static void stream_toggle_pause(VideoState *is)
1333 {
1334     if (is->paused) {
1335         is->frame_timer += av_gettime_relative() / 1000000.0 - is->vidclk.last_updated;
1336         if (is->read_pause_return != AVERROR(ENOSYS)) {
1337             is->vidclk.paused = 0;
1338         }
1339         set_clock(&is->vidclk, get_clock(&is->vidclk), is->vidclk.serial);
1340     }
1341     set_clock(&is->extclk, get_clock(&is->extclk), is->extclk.serial);
1342     is->paused = is->audclk.paused = is->vidclk.paused = is->extclk.paused = !is->paused;
1343 }
1344
1345 static void toggle_pause(VideoState *is)
1346 {
1347     stream_toggle_pause(is);
1348     is->step = 0;
1349 }
1350
1351 static void step_to_next_frame(VideoState *is)
1352 {
1353     /* if the stream is paused unpause it, then step */
1354     if (is->paused)
1355         stream_toggle_pause(is);
1356     is->step = 1;
1357 }
1358
1359 static double compute_target_delay(double delay, VideoState *is)
1360 {
1361     double sync_threshold, diff = 0;
1362
1363     /* update delay to follow master synchronisation source */
1364     if (get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER) {
1365         /* if video is slave, we try to correct big delays by
1366            duplicating or deleting a frame */
1367         diff = get_clock(&is->vidclk) - get_master_clock(is);
1368
1369         /* skip or repeat frame. We take into account the
1370            delay to compute the threshold. I still don't know
1371            if it is the best guess */
1372         sync_threshold = FFMAX(AV_SYNC_THRESHOLD_MIN, FFMIN(AV_SYNC_THRESHOLD_MAX, delay));
1373         if (!isnan(diff) && fabs(diff) < is->max_frame_duration) {
1374             if (diff <= -sync_threshold)
1375                 delay = FFMAX(0, delay + diff);
1376             else if (diff >= sync_threshold && delay > AV_SYNC_FRAMEDUP_THRESHOLD)
1377                 delay = delay + diff;
1378             else if (diff >= sync_threshold)
1379                 delay = 2 * delay;
1380         }
1381     }
1382
1383     av_log(NULL, AV_LOG_TRACE, "video: delay=%0.3f A-V=%f\n",
1384             delay, -diff);
1385
1386     return delay;
1387 }
1388
1389 static double vp_duration(VideoState *is, Frame *vp, Frame *nextvp) {
1390     if (vp->serial == nextvp->serial) {
1391         double duration = nextvp->pts - vp->pts;
1392         if (isnan(duration) || duration <= 0 || duration > is->max_frame_duration)
1393             return vp->duration;
1394         else
1395             return duration;
1396     } else {
1397         return 0.0;
1398     }
1399 }
1400
1401 static void update_video_pts(VideoState *is, double pts, int64_t pos, int serial) {
1402     /* update current video pts */
1403     set_clock(&is->vidclk, pts, serial);
1404     sync_clock_to_slave(&is->extclk, &is->vidclk);
1405 }
1406
1407 /* called to display each frame */
1408 static void video_refresh(void *opaque, double *remaining_time)
1409 {
1410     VideoState *is = opaque;
1411     double time;
1412
1413     Frame *sp, *sp2;
1414
1415     if (!is->paused && get_master_sync_type(is) == AV_SYNC_EXTERNAL_CLOCK && is->realtime)
1416         check_external_clock_speed(is);
1417
1418     if (!display_disable && is->show_mode != SHOW_MODE_VIDEO && is->audio_st) {
1419         time = av_gettime_relative() / 1000000.0;
1420         if (is->force_refresh || is->last_vis_time + rdftspeed < time) {
1421             video_display(is);
1422             is->last_vis_time = time;
1423         }
1424         *remaining_time = FFMIN(*remaining_time, is->last_vis_time + rdftspeed - time);
1425     }
1426
1427     if (is->video_st) {
1428         int redisplay = 0;
1429         if (is->force_refresh)
1430             redisplay = frame_queue_prev(&is->pictq);
1431 retry:
1432         if (frame_queue_nb_remaining(&is->pictq) == 0) {
1433             // nothing to do, no picture to display in the queue
1434         } else {
1435             double last_duration, duration, delay;
1436             Frame *vp, *lastvp;
1437
1438             /* dequeue the picture */
1439             lastvp = frame_queue_peek_last(&is->pictq);
1440             vp = frame_queue_peek(&is->pictq);
1441
1442             if (vp->serial != is->videoq.serial) {
1443                 frame_queue_next(&is->pictq);
1444                 redisplay = 0;
1445                 goto retry;
1446             }
1447
1448             if (lastvp->serial != vp->serial && !redisplay)
1449                 is->frame_timer = av_gettime_relative() / 1000000.0;
1450
1451             if (is->paused)
1452                 goto display;
1453
1454             /* compute nominal last_duration */
1455             last_duration = vp_duration(is, lastvp, vp);
1456             if (redisplay)
1457                 delay = 0.0;
1458             else
1459                 delay = compute_target_delay(last_duration, is);
1460
1461             time= av_gettime_relative()/1000000.0;
1462             if (time < is->frame_timer + delay && !redisplay) {
1463                 *remaining_time = FFMIN(is->frame_timer + delay - time, *remaining_time);
1464                 return;
1465             }
1466
1467             is->frame_timer += delay;
1468             if (delay > 0 && time - is->frame_timer > AV_SYNC_THRESHOLD_MAX)
1469                 is->frame_timer = time;
1470
1471             SDL_LockMutex(is->pictq.mutex);
1472             if (!redisplay && !isnan(vp->pts))
1473                 update_video_pts(is, vp->pts, vp->pos, vp->serial);
1474             SDL_UnlockMutex(is->pictq.mutex);
1475
1476             if (frame_queue_nb_remaining(&is->pictq) > 1) {
1477                 Frame *nextvp = frame_queue_peek_next(&is->pictq);
1478                 duration = vp_duration(is, vp, nextvp);
1479                 if(!is->step && (redisplay || framedrop>0 || (framedrop && get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER)) && time > is->frame_timer + duration){
1480                     if (!redisplay)
1481                         is->frame_drops_late++;
1482                     frame_queue_next(&is->pictq);
1483                     redisplay = 0;
1484                     goto retry;
1485                 }
1486             }
1487
1488             if (is->subtitle_st) {
1489                     while (frame_queue_nb_remaining(&is->subpq) > 0) {
1490                         sp = frame_queue_peek(&is->subpq);
1491
1492                         if (frame_queue_nb_remaining(&is->subpq) > 1)
1493                             sp2 = frame_queue_peek_next(&is->subpq);
1494                         else
1495                             sp2 = NULL;
1496
1497                         if (sp->serial != is->subtitleq.serial
1498                                 || (is->vidclk.pts > (sp->pts + ((float) sp->sub.end_display_time / 1000)))
1499                                 || (sp2 && is->vidclk.pts > (sp2->pts + ((float) sp2->sub.start_display_time / 1000))))
1500                         {
1501                             frame_queue_next(&is->subpq);
1502                         } else {
1503                             break;
1504                         }
1505                     }
1506             }
1507
1508 display:
1509             /* display picture */
1510             if (!display_disable && is->show_mode == SHOW_MODE_VIDEO)
1511                 video_display(is);
1512
1513             frame_queue_next(&is->pictq);
1514
1515             if (is->step && !is->paused)
1516                 stream_toggle_pause(is);
1517         }
1518     }
1519     is->force_refresh = 0;
1520     if (show_status) {
1521         static int64_t last_time;
1522         int64_t cur_time;
1523         int aqsize, vqsize, sqsize;
1524         double av_diff;
1525
1526         cur_time = av_gettime_relative();
1527         if (!last_time || (cur_time - last_time) >= 30000) {
1528             aqsize = 0;
1529             vqsize = 0;
1530             sqsize = 0;
1531             if (is->audio_st)
1532                 aqsize = is->audioq.size;
1533             if (is->video_st)
1534                 vqsize = is->videoq.size;
1535             if (is->subtitle_st)
1536                 sqsize = is->subtitleq.size;
1537             av_diff = 0;
1538             if (is->audio_st && is->video_st)
1539                 av_diff = get_clock(&is->audclk) - get_clock(&is->vidclk);
1540             else if (is->video_st)
1541                 av_diff = get_master_clock(is) - get_clock(&is->vidclk);
1542             else if (is->audio_st)
1543                 av_diff = get_master_clock(is) - get_clock(&is->audclk);
1544             av_log(NULL, AV_LOG_INFO,
1545                    "%7.2f %s:%7.3f fd=%4d aq=%5dKB vq=%5dKB sq=%5dB f=%"PRId64"/%"PRId64"   \r",
1546                    get_master_clock(is),
1547                    (is->audio_st && is->video_st) ? "A-V" : (is->video_st ? "M-V" : (is->audio_st ? "M-A" : "   ")),
1548                    av_diff,
1549                    is->frame_drops_early + is->frame_drops_late,
1550                    aqsize / 1024,
1551                    vqsize / 1024,
1552                    sqsize,
1553                    is->video_st ? is->video_st->codec->pts_correction_num_faulty_dts : 0,
1554                    is->video_st ? is->video_st->codec->pts_correction_num_faulty_pts : 0);
1555             fflush(stdout);
1556             last_time = cur_time;
1557         }
1558     }
1559 }
1560
1561 /* allocate a picture (needs to do that in main thread to avoid
1562    potential locking problems */
1563 static void alloc_picture(VideoState *is)
1564 {
1565     Frame *vp;
1566     int64_t bufferdiff;
1567
1568     vp = &is->pictq.queue[is->pictq.windex];
1569
1570     free_picture(vp);
1571
1572     video_open(is, 0, vp);
1573
1574     vp->bmp = SDL_CreateYUVOverlay(vp->width, vp->height,
1575                                    SDL_YV12_OVERLAY,
1576                                    screen);
1577     bufferdiff = vp->bmp ? FFMAX(vp->bmp->pixels[0], vp->bmp->pixels[1]) - FFMIN(vp->bmp->pixels[0], vp->bmp->pixels[1]) : 0;
1578     if (!vp->bmp || vp->bmp->pitches[0] < vp->width || bufferdiff < (int64_t)vp->height * vp->bmp->pitches[0]) {
1579         /* SDL allocates a buffer smaller than requested if the video
1580          * overlay hardware is unable to support the requested size. */
1581         av_log(NULL, AV_LOG_FATAL,
1582                "Error: the video system does not support an image\n"
1583                         "size of %dx%d pixels. Try using -lowres or -vf \"scale=w:h\"\n"
1584                         "to reduce the image size.\n", vp->width, vp->height );
1585         do_exit(is);
1586     }
1587
1588     SDL_LockMutex(is->pictq.mutex);
1589     vp->allocated = 1;
1590     SDL_CondSignal(is->pictq.cond);
1591     SDL_UnlockMutex(is->pictq.mutex);
1592 }
1593
1594 static void duplicate_right_border_pixels(SDL_Overlay *bmp) {
1595     int i, width, height;
1596     Uint8 *p, *maxp;
1597     for (i = 0; i < 3; i++) {
1598         width  = bmp->w;
1599         height = bmp->h;
1600         if (i > 0) {
1601             width  >>= 1;
1602             height >>= 1;
1603         }
1604         if (bmp->pitches[i] > width) {
1605             maxp = bmp->pixels[i] + bmp->pitches[i] * height - 1;
1606             for (p = bmp->pixels[i] + width - 1; p < maxp; p += bmp->pitches[i])
1607                 *(p+1) = *p;
1608         }
1609     }
1610 }
1611
1612 static int queue_picture(VideoState *is, AVFrame *src_frame, double pts, double duration, int64_t pos, int serial)
1613 {
1614     Frame *vp;
1615
1616 #if defined(DEBUG_SYNC) && 0
1617     printf("frame_type=%c pts=%0.3f\n",
1618            av_get_picture_type_char(src_frame->pict_type), pts);
1619 #endif
1620
1621     if (!(vp = frame_queue_peek_writable(&is->pictq)))
1622         return -1;
1623
1624     vp->sar = src_frame->sample_aspect_ratio;
1625
1626     /* alloc or resize hardware picture buffer */
1627     if (!vp->bmp || vp->reallocate || !vp->allocated ||
1628         vp->width  != src_frame->width ||
1629         vp->height != src_frame->height) {
1630         SDL_Event event;
1631
1632         vp->allocated  = 0;
1633         vp->reallocate = 0;
1634         vp->width = src_frame->width;
1635         vp->height = src_frame->height;
1636
1637         /* the allocation must be done in the main thread to avoid
1638            locking problems. */
1639         event.type = FF_ALLOC_EVENT;
1640         event.user.data1 = is;
1641         SDL_PushEvent(&event);
1642
1643         /* wait until the picture is allocated */
1644         SDL_LockMutex(is->pictq.mutex);
1645         while (!vp->allocated && !is->videoq.abort_request) {
1646             SDL_CondWait(is->pictq.cond, is->pictq.mutex);
1647         }
1648         /* if the queue is aborted, we have to pop the pending ALLOC event or wait for the allocation to complete */
1649         if (is->videoq.abort_request && SDL_PeepEvents(&event, 1, SDL_GETEVENT, SDL_EVENTMASK(FF_ALLOC_EVENT)) != 1) {
1650             while (!vp->allocated && !is->abort_request) {
1651                 SDL_CondWait(is->pictq.cond, is->pictq.mutex);
1652             }
1653         }
1654         SDL_UnlockMutex(is->pictq.mutex);
1655
1656         if (is->videoq.abort_request)
1657             return -1;
1658     }
1659
1660     /* if the frame is not skipped, then display it */
1661     if (vp->bmp) {
1662         AVPicture pict = { { 0 } };
1663
1664         /* get a pointer on the bitmap */
1665         SDL_LockYUVOverlay (vp->bmp);
1666
1667         pict.data[0] = vp->bmp->pixels[0];
1668         pict.data[1] = vp->bmp->pixels[2];
1669         pict.data[2] = vp->bmp->pixels[1];
1670
1671         pict.linesize[0] = vp->bmp->pitches[0];
1672         pict.linesize[1] = vp->bmp->pitches[2];
1673         pict.linesize[2] = vp->bmp->pitches[1];
1674
1675 #if CONFIG_AVFILTER
1676         // FIXME use direct rendering
1677         av_picture_copy(&pict, (AVPicture *)src_frame,
1678                         src_frame->format, vp->width, vp->height);
1679 #else
1680         av_opt_get_int(sws_opts, "sws_flags", 0, &sws_flags);
1681         is->img_convert_ctx = sws_getCachedContext(is->img_convert_ctx,
1682             vp->width, vp->height, src_frame->format, vp->width, vp->height,
1683             AV_PIX_FMT_YUV420P, sws_flags, NULL, NULL, NULL);
1684         if (!is->img_convert_ctx) {
1685             av_log(NULL, AV_LOG_FATAL, "Cannot initialize the conversion context\n");
1686             exit(1);
1687         }
1688         sws_scale(is->img_convert_ctx, src_frame->data, src_frame->linesize,
1689                   0, vp->height, pict.data, pict.linesize);
1690 #endif
1691         /* workaround SDL PITCH_WORKAROUND */
1692         duplicate_right_border_pixels(vp->bmp);
1693         /* update the bitmap content */
1694         SDL_UnlockYUVOverlay(vp->bmp);
1695
1696         vp->pts = pts;
1697         vp->duration = duration;
1698         vp->pos = pos;
1699         vp->serial = serial;
1700
1701         /* now we can update the picture count */
1702         frame_queue_push(&is->pictq);
1703     }
1704     return 0;
1705 }
1706
1707 static int get_video_frame(VideoState *is, AVFrame *frame)
1708 {
1709     int got_picture;
1710
1711     if ((got_picture = decoder_decode_frame(&is->viddec, frame, NULL)) < 0)
1712         return -1;
1713
1714     if (got_picture) {
1715         double dpts = NAN;
1716
1717         if (frame->pts != AV_NOPTS_VALUE)
1718             dpts = av_q2d(is->video_st->time_base) * frame->pts;
1719
1720         frame->sample_aspect_ratio = av_guess_sample_aspect_ratio(is->ic, is->video_st, frame);
1721
1722         is->viddec_width  = frame->width;
1723         is->viddec_height = frame->height;
1724
1725         if (framedrop>0 || (framedrop && get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER)) {
1726             if (frame->pts != AV_NOPTS_VALUE) {
1727                 double diff = dpts - get_master_clock(is);
1728                 if (!isnan(diff) && fabs(diff) < AV_NOSYNC_THRESHOLD &&
1729                     diff - is->frame_last_filter_delay < 0 &&
1730                     is->viddec.pkt_serial == is->vidclk.serial &&
1731                     is->videoq.nb_packets) {
1732                     is->frame_drops_early++;
1733                     av_frame_unref(frame);
1734                     got_picture = 0;
1735                 }
1736             }
1737         }
1738     }
1739
1740     return got_picture;
1741 }
1742
1743 #if CONFIG_AVFILTER
1744 static int configure_filtergraph(AVFilterGraph *graph, const char *filtergraph,
1745                                  AVFilterContext *source_ctx, AVFilterContext *sink_ctx)
1746 {
1747     int ret, i;
1748     int nb_filters = graph->nb_filters;
1749     AVFilterInOut *outputs = NULL, *inputs = NULL;
1750
1751     if (filtergraph) {
1752         outputs = avfilter_inout_alloc();
1753         inputs  = avfilter_inout_alloc();
1754         if (!outputs || !inputs) {
1755             ret = AVERROR(ENOMEM);
1756             goto fail;
1757         }
1758
1759         outputs->name       = av_strdup("in");
1760         outputs->filter_ctx = source_ctx;
1761         outputs->pad_idx    = 0;
1762         outputs->next       = NULL;
1763
1764         inputs->name        = av_strdup("out");
1765         inputs->filter_ctx  = sink_ctx;
1766         inputs->pad_idx     = 0;
1767         inputs->next        = NULL;
1768
1769         if ((ret = avfilter_graph_parse_ptr(graph, filtergraph, &inputs, &outputs, NULL)) < 0)
1770             goto fail;
1771     } else {
1772         if ((ret = avfilter_link(source_ctx, 0, sink_ctx, 0)) < 0)
1773             goto fail;
1774     }
1775
1776     /* Reorder the filters to ensure that inputs of the custom filters are merged first */
1777     for (i = 0; i < graph->nb_filters - nb_filters; i++)
1778         FFSWAP(AVFilterContext*, graph->filters[i], graph->filters[i + nb_filters]);
1779
1780     ret = avfilter_graph_config(graph, NULL);
1781 fail:
1782     avfilter_inout_free(&outputs);
1783     avfilter_inout_free(&inputs);
1784     return ret;
1785 }
1786
1787 static int configure_video_filters(AVFilterGraph *graph, VideoState *is, const char *vfilters, AVFrame *frame)
1788 {
1789     static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE };
1790     char sws_flags_str[128];
1791     char buffersrc_args[256];
1792     int ret;
1793     AVFilterContext *filt_src = NULL, *filt_out = NULL, *last_filter = NULL;
1794     AVCodecContext *codec = is->video_st->codec;
1795     AVRational fr = av_guess_frame_rate(is->ic, is->video_st, NULL);
1796
1797     av_opt_get_int(sws_opts, "sws_flags", 0, &sws_flags);
1798     snprintf(sws_flags_str, sizeof(sws_flags_str), "flags=%"PRId64, sws_flags);
1799     graph->scale_sws_opts = av_strdup(sws_flags_str);
1800
1801     snprintf(buffersrc_args, sizeof(buffersrc_args),
1802              "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d",
1803              frame->width, frame->height, frame->format,
1804              is->video_st->time_base.num, is->video_st->time_base.den,
1805              codec->sample_aspect_ratio.num, FFMAX(codec->sample_aspect_ratio.den, 1));
1806     if (fr.num && fr.den)
1807         av_strlcatf(buffersrc_args, sizeof(buffersrc_args), ":frame_rate=%d/%d", fr.num, fr.den);
1808
1809     if ((ret = avfilter_graph_create_filter(&filt_src,
1810                                             avfilter_get_by_name("buffer"),
1811                                             "ffplay_buffer", buffersrc_args, NULL,
1812                                             graph)) < 0)
1813         goto fail;
1814
1815     ret = avfilter_graph_create_filter(&filt_out,
1816                                        avfilter_get_by_name("buffersink"),
1817                                        "ffplay_buffersink", NULL, NULL, graph);
1818     if (ret < 0)
1819         goto fail;
1820
1821     if ((ret = av_opt_set_int_list(filt_out, "pix_fmts", pix_fmts,  AV_PIX_FMT_NONE, AV_OPT_SEARCH_CHILDREN)) < 0)
1822         goto fail;
1823
1824     last_filter = filt_out;
1825
1826 /* Note: this macro adds a filter before the lastly added filter, so the
1827  * processing order of the filters is in reverse */
1828 #define INSERT_FILT(name, arg) do {                                          \
1829     AVFilterContext *filt_ctx;                                               \
1830                                                                              \
1831     ret = avfilter_graph_create_filter(&filt_ctx,                            \
1832                                        avfilter_get_by_name(name),           \
1833                                        "ffplay_" name, arg, NULL, graph);    \
1834     if (ret < 0)                                                             \
1835         goto fail;                                                           \
1836                                                                              \
1837     ret = avfilter_link(filt_ctx, 0, last_filter, 0);                        \
1838     if (ret < 0)                                                             \
1839         goto fail;                                                           \
1840                                                                              \
1841     last_filter = filt_ctx;                                                  \
1842 } while (0)
1843
1844     /* SDL YUV code is not handling odd width/height for some driver
1845      * combinations, therefore we crop the picture to an even width/height. */
1846     INSERT_FILT("crop", "floor(in_w/2)*2:floor(in_h/2)*2");
1847
1848     if (autorotate) {
1849         double theta  = get_rotation(is->video_st);
1850
1851         if (fabs(theta - 90) < 1.0) {
1852             INSERT_FILT("transpose", "clock");
1853         } else if (fabs(theta - 180) < 1.0) {
1854             INSERT_FILT("hflip", NULL);
1855             INSERT_FILT("vflip", NULL);
1856         } else if (fabs(theta - 270) < 1.0) {
1857             INSERT_FILT("transpose", "cclock");
1858         } else if (fabs(theta) > 1.0) {
1859             char rotate_buf[64];
1860             snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
1861             INSERT_FILT("rotate", rotate_buf);
1862         }
1863     }
1864
1865     if ((ret = configure_filtergraph(graph, vfilters, filt_src, last_filter)) < 0)
1866         goto fail;
1867
1868     is->in_video_filter  = filt_src;
1869     is->out_video_filter = filt_out;
1870
1871 fail:
1872     return ret;
1873 }
1874
1875 static int configure_audio_filters(VideoState *is, const char *afilters, int force_output_format)
1876 {
1877     static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE };
1878     int sample_rates[2] = { 0, -1 };
1879     int64_t channel_layouts[2] = { 0, -1 };
1880     int channels[2] = { 0, -1 };
1881     AVFilterContext *filt_asrc = NULL, *filt_asink = NULL;
1882     char aresample_swr_opts[512] = "";
1883     AVDictionaryEntry *e = NULL;
1884     char asrc_args[256];
1885     int ret;
1886
1887     avfilter_graph_free(&is->agraph);
1888     if (!(is->agraph = avfilter_graph_alloc()))
1889         return AVERROR(ENOMEM);
1890
1891     while ((e = av_dict_get(swr_opts, "", e, AV_DICT_IGNORE_SUFFIX)))
1892         av_strlcatf(aresample_swr_opts, sizeof(aresample_swr_opts), "%s=%s:", e->key, e->value);
1893     if (strlen(aresample_swr_opts))
1894         aresample_swr_opts[strlen(aresample_swr_opts)-1] = '\0';
1895     av_opt_set(is->agraph, "aresample_swr_opts", aresample_swr_opts, 0);
1896
1897     ret = snprintf(asrc_args, sizeof(asrc_args),
1898                    "sample_rate=%d:sample_fmt=%s:channels=%d:time_base=%d/%d",
1899                    is->audio_filter_src.freq, av_get_sample_fmt_name(is->audio_filter_src.fmt),
1900                    is->audio_filter_src.channels,
1901                    1, is->audio_filter_src.freq);
1902     if (is->audio_filter_src.channel_layout)
1903         snprintf(asrc_args + ret, sizeof(asrc_args) - ret,
1904                  ":channel_layout=0x%"PRIx64,  is->audio_filter_src.channel_layout);
1905
1906     ret = avfilter_graph_create_filter(&filt_asrc,
1907                                        avfilter_get_by_name("abuffer"), "ffplay_abuffer",
1908                                        asrc_args, NULL, is->agraph);
1909     if (ret < 0)
1910         goto end;
1911
1912
1913     ret = avfilter_graph_create_filter(&filt_asink,
1914                                        avfilter_get_by_name("abuffersink"), "ffplay_abuffersink",
1915                                        NULL, NULL, is->agraph);
1916     if (ret < 0)
1917         goto end;
1918
1919     if ((ret = av_opt_set_int_list(filt_asink, "sample_fmts", sample_fmts,  AV_SAMPLE_FMT_NONE, AV_OPT_SEARCH_CHILDREN)) < 0)
1920         goto end;
1921     if ((ret = av_opt_set_int(filt_asink, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
1922         goto end;
1923
1924     if (force_output_format) {
1925         channel_layouts[0] = is->audio_tgt.channel_layout;
1926         channels       [0] = is->audio_tgt.channels;
1927         sample_rates   [0] = is->audio_tgt.freq;
1928         if ((ret = av_opt_set_int(filt_asink, "all_channel_counts", 0, AV_OPT_SEARCH_CHILDREN)) < 0)
1929             goto end;
1930         if ((ret = av_opt_set_int_list(filt_asink, "channel_layouts", channel_layouts,  -1, AV_OPT_SEARCH_CHILDREN)) < 0)
1931             goto end;
1932         if ((ret = av_opt_set_int_list(filt_asink, "channel_counts" , channels       ,  -1, AV_OPT_SEARCH_CHILDREN)) < 0)
1933             goto end;
1934         if ((ret = av_opt_set_int_list(filt_asink, "sample_rates"   , sample_rates   ,  -1, AV_OPT_SEARCH_CHILDREN)) < 0)
1935             goto end;
1936     }
1937
1938
1939     if ((ret = configure_filtergraph(is->agraph, afilters, filt_asrc, filt_asink)) < 0)
1940         goto end;
1941
1942     is->in_audio_filter  = filt_asrc;
1943     is->out_audio_filter = filt_asink;
1944
1945 end:
1946     if (ret < 0)
1947         avfilter_graph_free(&is->agraph);
1948     return ret;
1949 }
1950 #endif  /* CONFIG_AVFILTER */
1951
1952 static int audio_thread(void *arg)
1953 {
1954     VideoState *is = arg;
1955     AVFrame *frame = av_frame_alloc();
1956     Frame *af;
1957 #if CONFIG_AVFILTER
1958     int last_serial = -1;
1959     int64_t dec_channel_layout;
1960     int reconfigure;
1961 #endif
1962     int got_frame = 0;
1963     AVRational tb;
1964     int ret = 0;
1965
1966     if (!frame)
1967         return AVERROR(ENOMEM);
1968
1969     do {
1970         if ((got_frame = decoder_decode_frame(&is->auddec, frame, NULL)) < 0)
1971             goto the_end;
1972
1973         if (got_frame) {
1974                 tb = (AVRational){1, frame->sample_rate};
1975
1976 #if CONFIG_AVFILTER
1977                 dec_channel_layout = get_valid_channel_layout(frame->channel_layout, av_frame_get_channels(frame));
1978
1979                 reconfigure =
1980                     cmp_audio_fmts(is->audio_filter_src.fmt, is->audio_filter_src.channels,
1981                                    frame->format, av_frame_get_channels(frame))    ||
1982                     is->audio_filter_src.channel_layout != dec_channel_layout ||
1983                     is->audio_filter_src.freq           != frame->sample_rate ||
1984                     is->auddec.pkt_serial               != last_serial;
1985
1986                 if (reconfigure) {
1987                     char buf1[1024], buf2[1024];
1988                     av_get_channel_layout_string(buf1, sizeof(buf1), -1, is->audio_filter_src.channel_layout);
1989                     av_get_channel_layout_string(buf2, sizeof(buf2), -1, dec_channel_layout);
1990                     av_log(NULL, AV_LOG_DEBUG,
1991                            "Audio frame changed from rate:%d ch:%d fmt:%s layout:%s serial:%d to rate:%d ch:%d fmt:%s layout:%s serial:%d\n",
1992                            is->audio_filter_src.freq, is->audio_filter_src.channels, av_get_sample_fmt_name(is->audio_filter_src.fmt), buf1, last_serial,
1993                            frame->sample_rate, av_frame_get_channels(frame), av_get_sample_fmt_name(frame->format), buf2, is->auddec.pkt_serial);
1994
1995                     is->audio_filter_src.fmt            = frame->format;
1996                     is->audio_filter_src.channels       = av_frame_get_channels(frame);
1997                     is->audio_filter_src.channel_layout = dec_channel_layout;
1998                     is->audio_filter_src.freq           = frame->sample_rate;
1999                     last_serial                         = is->auddec.pkt_serial;
2000
2001                     if ((ret = configure_audio_filters(is, afilters, 1)) < 0)
2002                         goto the_end;
2003                 }
2004
2005             if ((ret = av_buffersrc_add_frame(is->in_audio_filter, frame)) < 0)
2006                 goto the_end;
2007
2008             while ((ret = av_buffersink_get_frame_flags(is->out_audio_filter, frame, 0)) >= 0) {
2009                 tb = is->out_audio_filter->inputs[0]->time_base;
2010 #endif
2011                 if (!(af = frame_queue_peek_writable(&is->sampq)))
2012                     goto the_end;
2013
2014                 af->pts = (frame->pts == AV_NOPTS_VALUE) ? NAN : frame->pts * av_q2d(tb);
2015                 af->pos = av_frame_get_pkt_pos(frame);
2016                 af->serial = is->auddec.pkt_serial;
2017                 af->duration = av_q2d((AVRational){frame->nb_samples, frame->sample_rate});
2018
2019                 av_frame_move_ref(af->frame, frame);
2020                 frame_queue_push(&is->sampq);
2021
2022 #if CONFIG_AVFILTER
2023                 if (is->audioq.serial != is->auddec.pkt_serial)
2024                     break;
2025             }
2026             if (ret == AVERROR_EOF)
2027                 is->auddec.finished = is->auddec.pkt_serial;
2028 #endif
2029         }
2030     } while (ret >= 0 || ret == AVERROR(EAGAIN) || ret == AVERROR_EOF);
2031  the_end:
2032 #if CONFIG_AVFILTER
2033     avfilter_graph_free(&is->agraph);
2034 #endif
2035     av_frame_free(&frame);
2036     return ret;
2037 }
2038
2039 static void decoder_start(Decoder *d, int (*fn)(void *), void *arg)
2040 {
2041     packet_queue_start(d->queue);
2042     d->decoder_tid = SDL_CreateThread(fn, arg);
2043 }
2044
2045 static int video_thread(void *arg)
2046 {
2047     VideoState *is = arg;
2048     AVFrame *frame = av_frame_alloc();
2049     double pts;
2050     double duration;
2051     int ret;
2052     AVRational tb = is->video_st->time_base;
2053     AVRational frame_rate = av_guess_frame_rate(is->ic, is->video_st, NULL);
2054
2055 #if CONFIG_AVFILTER
2056     AVFilterGraph *graph = avfilter_graph_alloc();
2057     AVFilterContext *filt_out = NULL, *filt_in = NULL;
2058     int last_w = 0;
2059     int last_h = 0;
2060     enum AVPixelFormat last_format = -2;
2061     int last_serial = -1;
2062     int last_vfilter_idx = 0;
2063     if (!graph) {
2064         av_frame_free(&frame);
2065         return AVERROR(ENOMEM);
2066     }
2067
2068 #endif
2069
2070     if (!frame) {
2071 #if CONFIG_AVFILTER
2072         avfilter_graph_free(&graph);
2073 #endif
2074         return AVERROR(ENOMEM);
2075     }
2076
2077     for (;;) {
2078         ret = get_video_frame(is, frame);
2079         if (ret < 0)
2080             goto the_end;
2081         if (!ret)
2082             continue;
2083
2084 #if CONFIG_AVFILTER
2085         if (   last_w != frame->width
2086             || last_h != frame->height
2087             || last_format != frame->format
2088             || last_serial != is->viddec.pkt_serial
2089             || last_vfilter_idx != is->vfilter_idx) {
2090             av_log(NULL, AV_LOG_DEBUG,
2091                    "Video frame changed from size:%dx%d format:%s serial:%d to size:%dx%d format:%s serial:%d\n",
2092                    last_w, last_h,
2093                    (const char *)av_x_if_null(av_get_pix_fmt_name(last_format), "none"), last_serial,
2094                    frame->width, frame->height,
2095                    (const char *)av_x_if_null(av_get_pix_fmt_name(frame->format), "none"), is->viddec.pkt_serial);
2096             avfilter_graph_free(&graph);
2097             graph = avfilter_graph_alloc();
2098             if ((ret = configure_video_filters(graph, is, vfilters_list ? vfilters_list[is->vfilter_idx] : NULL, frame)) < 0) {
2099                 SDL_Event event;
2100                 event.type = FF_QUIT_EVENT;
2101                 event.user.data1 = is;
2102                 SDL_PushEvent(&event);
2103                 goto the_end;
2104             }
2105             filt_in  = is->in_video_filter;
2106             filt_out = is->out_video_filter;
2107             last_w = frame->width;
2108             last_h = frame->height;
2109             last_format = frame->format;
2110             last_serial = is->viddec.pkt_serial;
2111             last_vfilter_idx = is->vfilter_idx;
2112             frame_rate = filt_out->inputs[0]->frame_rate;
2113         }
2114
2115         ret = av_buffersrc_add_frame(filt_in, frame);
2116         if (ret < 0)
2117             goto the_end;
2118
2119         while (ret >= 0) {
2120             is->frame_last_returned_time = av_gettime_relative() / 1000000.0;
2121
2122             ret = av_buffersink_get_frame_flags(filt_out, frame, 0);
2123             if (ret < 0) {
2124                 if (ret == AVERROR_EOF)
2125                     is->viddec.finished = is->viddec.pkt_serial;
2126                 ret = 0;
2127                 break;
2128             }
2129
2130             is->frame_last_filter_delay = av_gettime_relative() / 1000000.0 - is->frame_last_returned_time;
2131             if (fabs(is->frame_last_filter_delay) > AV_NOSYNC_THRESHOLD / 10.0)
2132                 is->frame_last_filter_delay = 0;
2133             tb = filt_out->inputs[0]->time_base;
2134 #endif
2135             duration = (frame_rate.num && frame_rate.den ? av_q2d((AVRational){frame_rate.den, frame_rate.num}) : 0);
2136             pts = (frame->pts == AV_NOPTS_VALUE) ? NAN : frame->pts * av_q2d(tb);
2137             ret = queue_picture(is, frame, pts, duration, av_frame_get_pkt_pos(frame), is->viddec.pkt_serial);
2138             av_frame_unref(frame);
2139 #if CONFIG_AVFILTER
2140         }
2141 #endif
2142
2143         if (ret < 0)
2144             goto the_end;
2145     }
2146  the_end:
2147 #if CONFIG_AVFILTER
2148     avfilter_graph_free(&graph);
2149 #endif
2150     av_frame_free(&frame);
2151     return 0;
2152 }
2153
2154 static int subtitle_thread(void *arg)
2155 {
2156     VideoState *is = arg;
2157     Frame *sp;
2158     int got_subtitle;
2159     double pts;
2160     int i;
2161
2162     for (;;) {
2163         if (!(sp = frame_queue_peek_writable(&is->subpq)))
2164             return 0;
2165
2166         if ((got_subtitle = decoder_decode_frame(&is->subdec, NULL, &sp->sub)) < 0)
2167             break;
2168
2169         pts = 0;
2170
2171         if (got_subtitle && sp->sub.format == 0) {
2172             if (sp->sub.pts != AV_NOPTS_VALUE)
2173                 pts = sp->sub.pts / (double)AV_TIME_BASE;
2174             sp->pts = pts;
2175             sp->serial = is->subdec.pkt_serial;
2176
2177             for (i = 0; i < sp->sub.num_rects; i++)
2178             {
2179                 int in_w = sp->sub.rects[i]->w;
2180                 int in_h = sp->sub.rects[i]->h;
2181                 int subw = is->subdec.avctx->width  ? is->subdec.avctx->width  : is->viddec_width;
2182                 int subh = is->subdec.avctx->height ? is->subdec.avctx->height : is->viddec_height;
2183                 int out_w = is->viddec_width  ? in_w * is->viddec_width  / subw : in_w;
2184                 int out_h = is->viddec_height ? in_h * is->viddec_height / subh : in_h;
2185                 AVPicture newpic;
2186
2187                 //can not use avpicture_alloc as it is not compatible with avsubtitle_free()
2188                 av_image_fill_linesizes(newpic.linesize, AV_PIX_FMT_YUVA420P, out_w);
2189                 newpic.data[0] = av_malloc(newpic.linesize[0] * out_h);
2190                 newpic.data[3] = av_malloc(newpic.linesize[3] * out_h);
2191                 newpic.data[1] = av_malloc(newpic.linesize[1] * ((out_h+1)/2));
2192                 newpic.data[2] = av_malloc(newpic.linesize[2] * ((out_h+1)/2));
2193
2194                 is->sub_convert_ctx = sws_getCachedContext(is->sub_convert_ctx,
2195                     in_w, in_h, AV_PIX_FMT_PAL8, out_w, out_h,
2196                     AV_PIX_FMT_YUVA420P, sws_flags, NULL, NULL, NULL);
2197                 if (!is->sub_convert_ctx || !newpic.data[0] || !newpic.data[3] ||
2198                     !newpic.data[1] || !newpic.data[2]
2199                 ) {
2200                     av_log(NULL, AV_LOG_FATAL, "Cannot initialize the sub conversion context\n");
2201                     exit(1);
2202                 }
2203                 sws_scale(is->sub_convert_ctx,
2204                           (void*)sp->sub.rects[i]->pict.data, sp->sub.rects[i]->pict.linesize,
2205                           0, in_h, newpic.data, newpic.linesize);
2206
2207                 av_free(sp->sub.rects[i]->pict.data[0]);
2208                 av_free(sp->sub.rects[i]->pict.data[1]);
2209                 sp->sub.rects[i]->pict = newpic;
2210                 sp->sub.rects[i]->w = out_w;
2211                 sp->sub.rects[i]->h = out_h;
2212                 sp->sub.rects[i]->x = sp->sub.rects[i]->x * out_w / in_w;
2213                 sp->sub.rects[i]->y = sp->sub.rects[i]->y * out_h / in_h;
2214             }
2215
2216             /* now we can update the picture count */
2217             frame_queue_push(&is->subpq);
2218         } else if (got_subtitle) {
2219             avsubtitle_free(&sp->sub);
2220         }
2221     }
2222     return 0;
2223 }
2224
2225 /* copy samples for viewing in editor window */
2226 static void update_sample_display(VideoState *is, short *samples, int samples_size)
2227 {
2228     int size, len;
2229
2230     size = samples_size / sizeof(short);
2231     while (size > 0) {
2232         len = SAMPLE_ARRAY_SIZE - is->sample_array_index;
2233         if (len > size)
2234             len = size;
2235         memcpy(is->sample_array + is->sample_array_index, samples, len * sizeof(short));
2236         samples += len;
2237         is->sample_array_index += len;
2238         if (is->sample_array_index >= SAMPLE_ARRAY_SIZE)
2239             is->sample_array_index = 0;
2240         size -= len;
2241     }
2242 }
2243
2244 /* return the wanted number of samples to get better sync if sync_type is video
2245  * or external master clock */
2246 static int synchronize_audio(VideoState *is, int nb_samples)
2247 {
2248     int wanted_nb_samples = nb_samples;
2249
2250     /* if not master, then we try to remove or add samples to correct the clock */
2251     if (get_master_sync_type(is) != AV_SYNC_AUDIO_MASTER) {
2252         double diff, avg_diff;
2253         int min_nb_samples, max_nb_samples;
2254
2255         diff = get_clock(&is->audclk) - get_master_clock(is);
2256
2257         if (!isnan(diff) && fabs(diff) < AV_NOSYNC_THRESHOLD) {
2258             is->audio_diff_cum = diff + is->audio_diff_avg_coef * is->audio_diff_cum;
2259             if (is->audio_diff_avg_count < AUDIO_DIFF_AVG_NB) {
2260                 /* not enough measures to have a correct estimate */
2261                 is->audio_diff_avg_count++;
2262             } else {
2263                 /* estimate the A-V difference */
2264                 avg_diff = is->audio_diff_cum * (1.0 - is->audio_diff_avg_coef);
2265
2266                 if (fabs(avg_diff) >= is->audio_diff_threshold) {
2267                     wanted_nb_samples = nb_samples + (int)(diff * is->audio_src.freq);
2268                     min_nb_samples = ((nb_samples * (100 - SAMPLE_CORRECTION_PERCENT_MAX) / 100));
2269                     max_nb_samples = ((nb_samples * (100 + SAMPLE_CORRECTION_PERCENT_MAX) / 100));
2270                     wanted_nb_samples = av_clip(wanted_nb_samples, min_nb_samples, max_nb_samples);
2271                 }
2272                 av_log(NULL, AV_LOG_TRACE, "diff=%f adiff=%f sample_diff=%d apts=%0.3f %f\n",
2273                         diff, avg_diff, wanted_nb_samples - nb_samples,
2274                         is->audio_clock, is->audio_diff_threshold);
2275             }
2276         } else {
2277             /* too big difference : may be initial PTS errors, so
2278                reset A-V filter */
2279             is->audio_diff_avg_count = 0;
2280             is->audio_diff_cum       = 0;
2281         }
2282     }
2283
2284     return wanted_nb_samples;
2285 }
2286
2287 /**
2288  * Decode one audio frame and return its uncompressed size.
2289  *
2290  * The processed audio frame is decoded, converted if required, and
2291  * stored in is->audio_buf, with size in bytes given by the return
2292  * value.
2293  */
2294 static int audio_decode_frame(VideoState *is)
2295 {
2296     int data_size, resampled_data_size;
2297     int64_t dec_channel_layout;
2298     av_unused double audio_clock0;
2299     int wanted_nb_samples;
2300     Frame *af;
2301
2302     if (is->paused)
2303         return -1;
2304
2305     do {
2306         if (!(af = frame_queue_peek_readable(&is->sampq)))
2307             return -1;
2308         frame_queue_next(&is->sampq);
2309     } while (af->serial != is->audioq.serial);
2310
2311     data_size = av_samples_get_buffer_size(NULL, av_frame_get_channels(af->frame),
2312                                            af->frame->nb_samples,
2313                                            af->frame->format, 1);
2314
2315     dec_channel_layout =
2316         (af->frame->channel_layout && av_frame_get_channels(af->frame) == av_get_channel_layout_nb_channels(af->frame->channel_layout)) ?
2317         af->frame->channel_layout : av_get_default_channel_layout(av_frame_get_channels(af->frame));
2318     wanted_nb_samples = synchronize_audio(is, af->frame->nb_samples);
2319
2320     if (af->frame->format        != is->audio_src.fmt            ||
2321         dec_channel_layout       != is->audio_src.channel_layout ||
2322         af->frame->sample_rate   != is->audio_src.freq           ||
2323         (wanted_nb_samples       != af->frame->nb_samples && !is->swr_ctx)) {
2324         swr_free(&is->swr_ctx);
2325         is->swr_ctx = swr_alloc_set_opts(NULL,
2326                                          is->audio_tgt.channel_layout, is->audio_tgt.fmt, is->audio_tgt.freq,
2327                                          dec_channel_layout,           af->frame->format, af->frame->sample_rate,
2328                                          0, NULL);
2329         if (!is->swr_ctx || swr_init(is->swr_ctx) < 0) {
2330             av_log(NULL, AV_LOG_ERROR,
2331                    "Cannot create sample rate converter for conversion of %d Hz %s %d channels to %d Hz %s %d channels!\n",
2332                     af->frame->sample_rate, av_get_sample_fmt_name(af->frame->format), av_frame_get_channels(af->frame),
2333                     is->audio_tgt.freq, av_get_sample_fmt_name(is->audio_tgt.fmt), is->audio_tgt.channels);
2334             swr_free(&is->swr_ctx);
2335             return -1;
2336         }
2337         is->audio_src.channel_layout = dec_channel_layout;
2338         is->audio_src.channels       = av_frame_get_channels(af->frame);
2339         is->audio_src.freq = af->frame->sample_rate;
2340         is->audio_src.fmt = af->frame->format;
2341     }
2342
2343     if (is->swr_ctx) {
2344         const uint8_t **in = (const uint8_t **)af->frame->extended_data;
2345         uint8_t **out = &is->audio_buf1;
2346         int out_count = (int64_t)wanted_nb_samples * is->audio_tgt.freq / af->frame->sample_rate + 256;
2347         int out_size  = av_samples_get_buffer_size(NULL, is->audio_tgt.channels, out_count, is->audio_tgt.fmt, 0);
2348         int len2;
2349         if (out_size < 0) {
2350             av_log(NULL, AV_LOG_ERROR, "av_samples_get_buffer_size() failed\n");
2351             return -1;
2352         }
2353         if (wanted_nb_samples != af->frame->nb_samples) {
2354             if (swr_set_compensation(is->swr_ctx, (wanted_nb_samples - af->frame->nb_samples) * is->audio_tgt.freq / af->frame->sample_rate,
2355                                         wanted_nb_samples * is->audio_tgt.freq / af->frame->sample_rate) < 0) {
2356                 av_log(NULL, AV_LOG_ERROR, "swr_set_compensation() failed\n");
2357                 return -1;
2358             }
2359         }
2360         av_fast_malloc(&is->audio_buf1, &is->audio_buf1_size, out_size);
2361         if (!is->audio_buf1)
2362             return AVERROR(ENOMEM);
2363         len2 = swr_convert(is->swr_ctx, out, out_count, in, af->frame->nb_samples);
2364         if (len2 < 0) {
2365             av_log(NULL, AV_LOG_ERROR, "swr_convert() failed\n");
2366             return -1;
2367         }
2368         if (len2 == out_count) {
2369             av_log(NULL, AV_LOG_WARNING, "audio buffer is probably too small\n");
2370             if (swr_init(is->swr_ctx) < 0)
2371                 swr_free(&is->swr_ctx);
2372         }
2373         is->audio_buf = is->audio_buf1;
2374         resampled_data_size = len2 * is->audio_tgt.channels * av_get_bytes_per_sample(is->audio_tgt.fmt);
2375     } else {
2376         is->audio_buf = af->frame->data[0];
2377         resampled_data_size = data_size;
2378     }
2379
2380     audio_clock0 = is->audio_clock;
2381     /* update the audio clock with the pts */
2382     if (!isnan(af->pts))
2383         is->audio_clock = af->pts + (double) af->frame->nb_samples / af->frame->sample_rate;
2384     else
2385         is->audio_clock = NAN;
2386     is->audio_clock_serial = af->serial;
2387 #ifdef DEBUG
2388     {
2389         static double last_clock;
2390         printf("audio: delay=%0.3f clock=%0.3f clock0=%0.3f\n",
2391                is->audio_clock - last_clock,
2392                is->audio_clock, audio_clock0);
2393         last_clock = is->audio_clock;
2394     }
2395 #endif
2396     return resampled_data_size;
2397 }
2398
2399 /* prepare a new audio buffer */
2400 static void sdl_audio_callback(void *opaque, Uint8 *stream, int len)
2401 {
2402     VideoState *is = opaque;
2403     int audio_size, len1;
2404
2405     audio_callback_time = av_gettime_relative();
2406
2407     while (len > 0) {
2408         if (is->audio_buf_index >= is->audio_buf_size) {
2409            audio_size = audio_decode_frame(is);
2410            if (audio_size < 0) {
2411                 /* if error, just output silence */
2412                is->audio_buf      = is->silence_buf;
2413                is->audio_buf_size = sizeof(is->silence_buf) / is->audio_tgt.frame_size * is->audio_tgt.frame_size;
2414            } else {
2415                if (is->show_mode != SHOW_MODE_VIDEO)
2416                    update_sample_display(is, (int16_t *)is->audio_buf, audio_size);
2417                is->audio_buf_size = audio_size;
2418            }
2419            is->audio_buf_index = 0;
2420         }
2421         len1 = is->audio_buf_size - is->audio_buf_index;
2422         if (len1 > len)
2423             len1 = len;
2424         memcpy(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, len1);
2425         len -= len1;
2426         stream += len1;
2427         is->audio_buf_index += len1;
2428     }
2429     is->audio_write_buf_size = is->audio_buf_size - is->audio_buf_index;
2430     /* Let's assume the audio driver that is used by SDL has two periods. */
2431     if (!isnan(is->audio_clock)) {
2432         set_clock_at(&is->audclk, is->audio_clock - (double)(2 * is->audio_hw_buf_size + is->audio_write_buf_size) / is->audio_tgt.bytes_per_sec, is->audio_clock_serial, audio_callback_time / 1000000.0);
2433         sync_clock_to_slave(&is->extclk, &is->audclk);
2434     }
2435 }
2436
2437 static int audio_open(void *opaque, int64_t wanted_channel_layout, int wanted_nb_channels, int wanted_sample_rate, struct AudioParams *audio_hw_params)
2438 {
2439     SDL_AudioSpec wanted_spec, spec;
2440     const char *env;
2441     static const int next_nb_channels[] = {0, 0, 1, 6, 2, 6, 4, 6};
2442     static const int next_sample_rates[] = {0, 44100, 48000, 96000, 192000};
2443     int next_sample_rate_idx = FF_ARRAY_ELEMS(next_sample_rates) - 1;
2444
2445     env = SDL_getenv("SDL_AUDIO_CHANNELS");
2446     if (env) {
2447         wanted_nb_channels = atoi(env);
2448         wanted_channel_layout = av_get_default_channel_layout(wanted_nb_channels);
2449     }
2450     if (!wanted_channel_layout || wanted_nb_channels != av_get_channel_layout_nb_channels(wanted_channel_layout)) {
2451         wanted_channel_layout = av_get_default_channel_layout(wanted_nb_channels);
2452         wanted_channel_layout &= ~AV_CH_LAYOUT_STEREO_DOWNMIX;
2453     }
2454     wanted_nb_channels = av_get_channel_layout_nb_channels(wanted_channel_layout);
2455     wanted_spec.channels = wanted_nb_channels;
2456     wanted_spec.freq = wanted_sample_rate;
2457     if (wanted_spec.freq <= 0 || wanted_spec.channels <= 0) {
2458         av_log(NULL, AV_LOG_ERROR, "Invalid sample rate or channel count!\n");
2459         return -1;
2460     }
2461     while (next_sample_rate_idx && next_sample_rates[next_sample_rate_idx] >= wanted_spec.freq)
2462         next_sample_rate_idx--;
2463     wanted_spec.format = AUDIO_S16SYS;
2464     wanted_spec.silence = 0;
2465     wanted_spec.samples = FFMAX(SDL_AUDIO_MIN_BUFFER_SIZE, 2 << av_log2(wanted_spec.freq / SDL_AUDIO_MAX_CALLBACKS_PER_SEC));
2466     wanted_spec.callback = sdl_audio_callback;
2467     wanted_spec.userdata = opaque;
2468     while (SDL_OpenAudio(&wanted_spec, &spec) < 0) {
2469         av_log(NULL, AV_LOG_WARNING, "SDL_OpenAudio (%d channels, %d Hz): %s\n",
2470                wanted_spec.channels, wanted_spec.freq, SDL_GetError());
2471         wanted_spec.channels = next_nb_channels[FFMIN(7, wanted_spec.channels)];
2472         if (!wanted_spec.channels) {
2473             wanted_spec.freq = next_sample_rates[next_sample_rate_idx--];
2474             wanted_spec.channels = wanted_nb_channels;
2475             if (!wanted_spec.freq) {
2476                 av_log(NULL, AV_LOG_ERROR,
2477                        "No more combinations to try, audio open failed\n");
2478                 return -1;
2479             }
2480         }
2481         wanted_channel_layout = av_get_default_channel_layout(wanted_spec.channels);
2482     }
2483     if (spec.format != AUDIO_S16SYS) {
2484         av_log(NULL, AV_LOG_ERROR,
2485                "SDL advised audio format %d is not supported!\n", spec.format);
2486         return -1;
2487     }
2488     if (spec.channels != wanted_spec.channels) {
2489         wanted_channel_layout = av_get_default_channel_layout(spec.channels);
2490         if (!wanted_channel_layout) {
2491             av_log(NULL, AV_LOG_ERROR,
2492                    "SDL advised channel count %d is not supported!\n", spec.channels);
2493             return -1;
2494         }
2495     }
2496
2497     audio_hw_params->fmt = AV_SAMPLE_FMT_S16;
2498     audio_hw_params->freq = spec.freq;
2499     audio_hw_params->channel_layout = wanted_channel_layout;
2500     audio_hw_params->channels =  spec.channels;
2501     audio_hw_params->frame_size = av_samples_get_buffer_size(NULL, audio_hw_params->channels, 1, audio_hw_params->fmt, 1);
2502     audio_hw_params->bytes_per_sec = av_samples_get_buffer_size(NULL, audio_hw_params->channels, audio_hw_params->freq, audio_hw_params->fmt, 1);
2503     if (audio_hw_params->bytes_per_sec <= 0 || audio_hw_params->frame_size <= 0) {
2504         av_log(NULL, AV_LOG_ERROR, "av_samples_get_buffer_size failed\n");
2505         return -1;
2506     }
2507     return spec.size;
2508 }
2509
2510 /* open a given stream. Return 0 if OK */
2511 static int stream_component_open(VideoState *is, int stream_index)
2512 {
2513     AVFormatContext *ic = is->ic;
2514     AVCodecContext *avctx;
2515     AVCodec *codec;
2516     const char *forced_codec_name = NULL;
2517     AVDictionary *opts;
2518     AVDictionaryEntry *t = NULL;
2519     int sample_rate, nb_channels;
2520     int64_t channel_layout;
2521     int ret = 0;
2522     int stream_lowres = lowres;
2523
2524     if (stream_index < 0 || stream_index >= ic->nb_streams)
2525         return -1;
2526     avctx = ic->streams[stream_index]->codec;
2527
2528     codec = avcodec_find_decoder(avctx->codec_id);
2529
2530     switch(avctx->codec_type){
2531         case AVMEDIA_TYPE_AUDIO   : is->last_audio_stream    = stream_index; forced_codec_name =    audio_codec_name; break;
2532         case AVMEDIA_TYPE_SUBTITLE: is->last_subtitle_stream = stream_index; forced_codec_name = subtitle_codec_name; break;
2533         case AVMEDIA_TYPE_VIDEO   : is->last_video_stream    = stream_index; forced_codec_name =    video_codec_name; break;
2534     }
2535     if (forced_codec_name)
2536         codec = avcodec_find_decoder_by_name(forced_codec_name);
2537     if (!codec) {
2538         if (forced_codec_name) av_log(NULL, AV_LOG_WARNING,
2539                                       "No codec could be found with name '%s'\n", forced_codec_name);
2540         else                   av_log(NULL, AV_LOG_WARNING,
2541                                       "No codec could be found with id %d\n", avctx->codec_id);
2542         return -1;
2543     }
2544
2545     avctx->codec_id = codec->id;
2546     if(stream_lowres > av_codec_get_max_lowres(codec)){
2547         av_log(avctx, AV_LOG_WARNING, "The maximum value for lowres supported by the decoder is %d\n",
2548                 av_codec_get_max_lowres(codec));
2549         stream_lowres = av_codec_get_max_lowres(codec);
2550     }
2551     av_codec_set_lowres(avctx, stream_lowres);
2552
2553     if(stream_lowres) avctx->flags |= CODEC_FLAG_EMU_EDGE;
2554     if (fast)
2555         avctx->flags2 |= AV_CODEC_FLAG2_FAST;
2556     if(codec->capabilities & AV_CODEC_CAP_DR1)
2557         avctx->flags |= CODEC_FLAG_EMU_EDGE;
2558
2559     opts = filter_codec_opts(codec_opts, avctx->codec_id, ic, ic->streams[stream_index], codec);
2560     if (!av_dict_get(opts, "threads", NULL, 0))
2561         av_dict_set(&opts, "threads", "auto", 0);
2562     if (stream_lowres)
2563         av_dict_set_int(&opts, "lowres", stream_lowres, 0);
2564     if (avctx->codec_type == AVMEDIA_TYPE_VIDEO || avctx->codec_type == AVMEDIA_TYPE_AUDIO)
2565         av_dict_set(&opts, "refcounted_frames", "1", 0);
2566     if ((ret = avcodec_open2(avctx, codec, &opts)) < 0) {
2567         goto fail;
2568     }
2569     if ((t = av_dict_get(opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2570         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2571         ret =  AVERROR_OPTION_NOT_FOUND;
2572         goto fail;
2573     }
2574
2575     is->eof = 0;
2576     ic->streams[stream_index]->discard = AVDISCARD_DEFAULT;
2577     switch (avctx->codec_type) {
2578     case AVMEDIA_TYPE_AUDIO:
2579 #if CONFIG_AVFILTER
2580         {
2581             AVFilterLink *link;
2582
2583             is->audio_filter_src.freq           = avctx->sample_rate;
2584             is->audio_filter_src.channels       = avctx->channels;
2585             is->audio_filter_src.channel_layout = get_valid_channel_layout(avctx->channel_layout, avctx->channels);
2586             is->audio_filter_src.fmt            = avctx->sample_fmt;
2587             if ((ret = configure_audio_filters(is, afilters, 0)) < 0)
2588                 goto fail;
2589             link = is->out_audio_filter->inputs[0];
2590             sample_rate    = link->sample_rate;
2591             nb_channels    = link->channels;
2592             channel_layout = link->channel_layout;
2593         }
2594 #else
2595         sample_rate    = avctx->sample_rate;
2596         nb_channels    = avctx->channels;
2597         channel_layout = avctx->channel_layout;
2598 #endif
2599
2600         /* prepare audio output */
2601         if ((ret = audio_open(is, channel_layout, nb_channels, sample_rate, &is->audio_tgt)) < 0)
2602             goto fail;
2603         is->audio_hw_buf_size = ret;
2604         is->audio_src = is->audio_tgt;
2605         is->audio_buf_size  = 0;
2606         is->audio_buf_index = 0;
2607
2608         /* init averaging filter */
2609         is->audio_diff_avg_coef  = exp(log(0.01) / AUDIO_DIFF_AVG_NB);
2610         is->audio_diff_avg_count = 0;
2611         /* since we do not have a precise anough audio fifo fullness,
2612            we correct audio sync only if larger than this threshold */
2613         is->audio_diff_threshold = (double)(is->audio_hw_buf_size) / is->audio_tgt.bytes_per_sec;
2614
2615         is->audio_stream = stream_index;
2616         is->audio_st = ic->streams[stream_index];
2617
2618         decoder_init(&is->auddec, avctx, &is->audioq, is->continue_read_thread);
2619         if ((is->ic->iformat->flags & (AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK)) && !is->ic->iformat->read_seek) {
2620             is->auddec.start_pts = is->audio_st->start_time;
2621             is->auddec.start_pts_tb = is->audio_st->time_base;
2622         }
2623         decoder_start(&is->auddec, audio_thread, is);
2624         SDL_PauseAudio(0);
2625         break;
2626     case AVMEDIA_TYPE_VIDEO:
2627         is->video_stream = stream_index;
2628         is->video_st = ic->streams[stream_index];
2629
2630         is->viddec_width  = avctx->width;
2631         is->viddec_height = avctx->height;
2632
2633         decoder_init(&is->viddec, avctx, &is->videoq, is->continue_read_thread);
2634         decoder_start(&is->viddec, video_thread, is);
2635         is->queue_attachments_req = 1;
2636         break;
2637     case AVMEDIA_TYPE_SUBTITLE:
2638         is->subtitle_stream = stream_index;
2639         is->subtitle_st = ic->streams[stream_index];
2640
2641         decoder_init(&is->subdec, avctx, &is->subtitleq, is->continue_read_thread);
2642         decoder_start(&is->subdec, subtitle_thread, is);
2643         break;
2644     default:
2645         break;
2646     }
2647
2648 fail:
2649     av_dict_free(&opts);
2650
2651     return ret;
2652 }
2653
2654 static void stream_component_close(VideoState *is, int stream_index)
2655 {
2656     AVFormatContext *ic = is->ic;
2657     AVCodecContext *avctx;
2658
2659     if (stream_index < 0 || stream_index >= ic->nb_streams)
2660         return;
2661     avctx = ic->streams[stream_index]->codec;
2662
2663     switch (avctx->codec_type) {
2664     case AVMEDIA_TYPE_AUDIO:
2665         decoder_abort(&is->auddec, &is->sampq);
2666         SDL_CloseAudio();
2667         decoder_destroy(&is->auddec);
2668         swr_free(&is->swr_ctx);
2669         av_freep(&is->audio_buf1);
2670         is->audio_buf1_size = 0;
2671         is->audio_buf = NULL;
2672
2673         if (is->rdft) {
2674             av_rdft_end(is->rdft);
2675             av_freep(&is->rdft_data);
2676             is->rdft = NULL;
2677             is->rdft_bits = 0;
2678         }
2679         break;
2680     case AVMEDIA_TYPE_VIDEO:
2681         decoder_abort(&is->viddec, &is->pictq);
2682         decoder_destroy(&is->viddec);
2683         break;
2684     case AVMEDIA_TYPE_SUBTITLE:
2685         decoder_abort(&is->subdec, &is->subpq);
2686         decoder_destroy(&is->subdec);
2687         break;
2688     default:
2689         break;
2690     }
2691
2692     ic->streams[stream_index]->discard = AVDISCARD_ALL;
2693     avcodec_close(avctx);
2694     switch (avctx->codec_type) {
2695     case AVMEDIA_TYPE_AUDIO:
2696         is->audio_st = NULL;
2697         is->audio_stream = -1;
2698         break;
2699     case AVMEDIA_TYPE_VIDEO:
2700         is->video_st = NULL;
2701         is->video_stream = -1;
2702         break;
2703     case AVMEDIA_TYPE_SUBTITLE:
2704         is->subtitle_st = NULL;
2705         is->subtitle_stream = -1;
2706         break;
2707     default:
2708         break;
2709     }
2710 }
2711
2712 static int decode_interrupt_cb(void *ctx)
2713 {
2714     VideoState *is = ctx;
2715     return is->abort_request;
2716 }
2717
2718 static int is_realtime(AVFormatContext *s)
2719 {
2720     if(   !strcmp(s->iformat->name, "rtp")
2721        || !strcmp(s->iformat->name, "rtsp")
2722        || !strcmp(s->iformat->name, "sdp")
2723     )
2724         return 1;
2725
2726     if(s->pb && (   !strncmp(s->filename, "rtp:", 4)
2727                  || !strncmp(s->filename, "udp:", 4)
2728                 )
2729     )
2730         return 1;
2731     return 0;
2732 }
2733
2734 /* this thread gets the stream from the disk or the network */
2735 static int read_thread(void *arg)
2736 {
2737     VideoState *is = arg;
2738     AVFormatContext *ic = NULL;
2739     int err, i, ret;
2740     int st_index[AVMEDIA_TYPE_NB];
2741     AVPacket pkt1, *pkt = &pkt1;
2742     int64_t stream_start_time;
2743     int pkt_in_play_range = 0;
2744     AVDictionaryEntry *t;
2745     AVDictionary **opts;
2746     int orig_nb_streams;
2747     SDL_mutex *wait_mutex = SDL_CreateMutex();
2748     int scan_all_pmts_set = 0;
2749     int64_t pkt_ts;
2750
2751     memset(st_index, -1, sizeof(st_index));
2752     is->last_video_stream = is->video_stream = -1;
2753     is->last_audio_stream = is->audio_stream = -1;
2754     is->last_subtitle_stream = is->subtitle_stream = -1;
2755     is->eof = 0;
2756
2757     ic = avformat_alloc_context();
2758     if (!ic) {
2759         av_log(NULL, AV_LOG_FATAL, "Could not allocate context.\n");
2760         ret = AVERROR(ENOMEM);
2761         goto fail;
2762     }
2763     ic->interrupt_callback.callback = decode_interrupt_cb;
2764     ic->interrupt_callback.opaque = is;
2765     if (!av_dict_get(format_opts, "scan_all_pmts", NULL, AV_DICT_MATCH_CASE)) {
2766         av_dict_set(&format_opts, "scan_all_pmts", "1", AV_DICT_DONT_OVERWRITE);
2767         scan_all_pmts_set = 1;
2768     }
2769     err = avformat_open_input(&ic, is->filename, is->iformat, &format_opts);
2770     if (err < 0) {
2771         print_error(is->filename, err);
2772         ret = -1;
2773         goto fail;
2774     }
2775     if (scan_all_pmts_set)
2776         av_dict_set(&format_opts, "scan_all_pmts", NULL, AV_DICT_MATCH_CASE);
2777
2778     if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2779         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2780         ret = AVERROR_OPTION_NOT_FOUND;
2781         goto fail;
2782     }
2783     is->ic = ic;
2784
2785     if (genpts)
2786         ic->flags |= AVFMT_FLAG_GENPTS;
2787
2788     av_format_inject_global_side_data(ic);
2789
2790     opts = setup_find_stream_info_opts(ic, codec_opts);
2791     orig_nb_streams = ic->nb_streams;
2792
2793     err = avformat_find_stream_info(ic, opts);
2794
2795     for (i = 0; i < orig_nb_streams; i++)
2796         av_dict_free(&opts[i]);
2797     av_freep(&opts);
2798
2799     if (err < 0) {
2800         av_log(NULL, AV_LOG_WARNING,
2801                "%s: could not find codec parameters\n", is->filename);
2802         ret = -1;
2803         goto fail;
2804     }
2805
2806     if (ic->pb)
2807         ic->pb->eof_reached = 0; // FIXME hack, ffplay maybe should not use avio_feof() to test for the end
2808
2809     if (seek_by_bytes < 0)
2810         seek_by_bytes = !!(ic->iformat->flags & AVFMT_TS_DISCONT) && strcmp("ogg", ic->iformat->name);
2811
2812     is->max_frame_duration = (ic->iformat->flags & AVFMT_TS_DISCONT) ? 10.0 : 3600.0;
2813
2814     if (!window_title && (t = av_dict_get(ic->metadata, "title", NULL, 0)))
2815         window_title = av_asprintf("%s - %s", t->value, input_filename);
2816
2817     /* if seeking requested, we execute it */
2818     if (start_time != AV_NOPTS_VALUE) {
2819         int64_t timestamp;
2820
2821         timestamp = start_time;
2822         /* add the stream start time */
2823         if (ic->start_time != AV_NOPTS_VALUE)
2824             timestamp += ic->start_time;
2825         ret = avformat_seek_file(ic, -1, INT64_MIN, timestamp, INT64_MAX, 0);
2826         if (ret < 0) {
2827             av_log(NULL, AV_LOG_WARNING, "%s: could not seek to position %0.3f\n",
2828                     is->filename, (double)timestamp / AV_TIME_BASE);
2829         }
2830     }
2831
2832     is->realtime = is_realtime(ic);
2833
2834     if (show_status)
2835         av_dump_format(ic, 0, is->filename, 0);
2836
2837     for (i = 0; i < ic->nb_streams; i++) {
2838         AVStream *st = ic->streams[i];
2839         enum AVMediaType type = st->codec->codec_type;
2840         st->discard = AVDISCARD_ALL;
2841         if (wanted_stream_spec[type] && st_index[type] == -1)
2842             if (avformat_match_stream_specifier(ic, st, wanted_stream_spec[type]) > 0)
2843                 st_index[type] = i;
2844     }
2845     for (i = 0; i < AVMEDIA_TYPE_NB; i++) {
2846         if (wanted_stream_spec[i] && st_index[i] == -1) {
2847             av_log(NULL, AV_LOG_ERROR, "Stream specifier %s does not match any %s stream\n", wanted_stream_spec[i], av_get_media_type_string(i));
2848             st_index[i] = INT_MAX;
2849         }
2850     }
2851
2852     if (!video_disable)
2853         st_index[AVMEDIA_TYPE_VIDEO] =
2854             av_find_best_stream(ic, AVMEDIA_TYPE_VIDEO,
2855                                 st_index[AVMEDIA_TYPE_VIDEO], -1, NULL, 0);
2856     if (!audio_disable)
2857         st_index[AVMEDIA_TYPE_AUDIO] =
2858             av_find_best_stream(ic, AVMEDIA_TYPE_AUDIO,
2859                                 st_index[AVMEDIA_TYPE_AUDIO],
2860                                 st_index[AVMEDIA_TYPE_VIDEO],
2861                                 NULL, 0);
2862     if (!video_disable && !subtitle_disable)
2863         st_index[AVMEDIA_TYPE_SUBTITLE] =
2864             av_find_best_stream(ic, AVMEDIA_TYPE_SUBTITLE,
2865                                 st_index[AVMEDIA_TYPE_SUBTITLE],
2866                                 (st_index[AVMEDIA_TYPE_AUDIO] >= 0 ?
2867                                  st_index[AVMEDIA_TYPE_AUDIO] :
2868                                  st_index[AVMEDIA_TYPE_VIDEO]),
2869                                 NULL, 0);
2870
2871     is->show_mode = show_mode;
2872     if (st_index[AVMEDIA_TYPE_VIDEO] >= 0) {
2873         AVStream *st = ic->streams[st_index[AVMEDIA_TYPE_VIDEO]];
2874         AVCodecContext *avctx = st->codec;
2875         AVRational sar = av_guess_sample_aspect_ratio(ic, st, NULL);
2876         if (avctx->width)
2877             set_default_window_size(avctx->width, avctx->height, sar);
2878     }
2879
2880     /* open the streams */
2881     if (st_index[AVMEDIA_TYPE_AUDIO] >= 0) {
2882         stream_component_open(is, st_index[AVMEDIA_TYPE_AUDIO]);
2883     }
2884
2885     ret = -1;
2886     if (st_index[AVMEDIA_TYPE_VIDEO] >= 0) {
2887         ret = stream_component_open(is, st_index[AVMEDIA_TYPE_VIDEO]);
2888     }
2889     if (is->show_mode == SHOW_MODE_NONE)
2890         is->show_mode = ret >= 0 ? SHOW_MODE_VIDEO : SHOW_MODE_RDFT;
2891
2892     if (st_index[AVMEDIA_TYPE_SUBTITLE] >= 0) {
2893         stream_component_open(is, st_index[AVMEDIA_TYPE_SUBTITLE]);
2894     }
2895
2896     if (is->video_stream < 0 && is->audio_stream < 0) {
2897         av_log(NULL, AV_LOG_FATAL, "Failed to open file '%s' or configure filtergraph\n",
2898                is->filename);
2899         ret = -1;
2900         goto fail;
2901     }
2902
2903     if (infinite_buffer < 0 && is->realtime)
2904         infinite_buffer = 1;
2905
2906     for (;;) {
2907         if (is->abort_request)
2908             break;
2909         if (is->paused != is->last_paused) {
2910             is->last_paused = is->paused;
2911             if (is->paused)
2912                 is->read_pause_return = av_read_pause(ic);
2913             else
2914                 av_read_play(ic);
2915         }
2916 #if CONFIG_RTSP_DEMUXER || CONFIG_MMSH_PROTOCOL
2917         if (is->paused &&
2918                 (!strcmp(ic->iformat->name, "rtsp") ||
2919                  (ic->pb && !strncmp(input_filename, "mmsh:", 5)))) {
2920             /* wait 10 ms to avoid trying to get another packet */
2921             /* XXX: horrible */
2922             SDL_Delay(10);
2923             continue;
2924         }
2925 #endif
2926         if (is->seek_req) {
2927             int64_t seek_target = is->seek_pos;
2928             int64_t seek_min    = is->seek_rel > 0 ? seek_target - is->seek_rel + 2: INT64_MIN;
2929             int64_t seek_max    = is->seek_rel < 0 ? seek_target - is->seek_rel - 2: INT64_MAX;
2930 // FIXME the +-2 is due to rounding being not done in the correct direction in generation
2931 //      of the seek_pos/seek_rel variables
2932
2933             ret = avformat_seek_file(is->ic, -1, seek_min, seek_target, seek_max, is->seek_flags);
2934             if (ret < 0) {
2935                 av_log(NULL, AV_LOG_ERROR,
2936                        "%s: error while seeking\n", is->ic->filename);
2937             } else {
2938                 if (is->audio_stream >= 0) {
2939                     packet_queue_flush(&is->audioq);
2940                     packet_queue_put(&is->audioq, &flush_pkt);
2941                 }
2942                 if (is->subtitle_stream >= 0) {
2943                     packet_queue_flush(&is->subtitleq);
2944                     packet_queue_put(&is->subtitleq, &flush_pkt);
2945                 }
2946                 if (is->video_stream >= 0) {
2947                     packet_queue_flush(&is->videoq);
2948                     packet_queue_put(&is->videoq, &flush_pkt);
2949                 }
2950                 if (is->seek_flags & AVSEEK_FLAG_BYTE) {
2951                    set_clock(&is->extclk, NAN, 0);
2952                 } else {
2953                    set_clock(&is->extclk, seek_target / (double)AV_TIME_BASE, 0);
2954                 }
2955             }
2956             is->seek_req = 0;
2957             is->queue_attachments_req = 1;
2958             is->eof = 0;
2959             if (is->paused)
2960                 step_to_next_frame(is);
2961         }
2962         if (is->queue_attachments_req) {
2963             if (is->video_st && is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC) {
2964                 AVPacket copy;
2965                 if ((ret = av_copy_packet(&copy, &is->video_st->attached_pic)) < 0)
2966                     goto fail;
2967                 packet_queue_put(&is->videoq, &copy);
2968                 packet_queue_put_nullpacket(&is->videoq, is->video_stream);
2969             }
2970             is->queue_attachments_req = 0;
2971         }
2972
2973         /* if the queue are full, no need to read more */
2974         if (infinite_buffer<1 &&
2975               (is->audioq.size + is->videoq.size + is->subtitleq.size > MAX_QUEUE_SIZE
2976             || (   (is->audioq   .nb_packets > MIN_FRAMES || is->audio_stream < 0 || is->audioq.abort_request)
2977                 && (is->videoq   .nb_packets > MIN_FRAMES || is->video_stream < 0 || is->videoq.abort_request
2978                     || (is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC))
2979                 && (is->subtitleq.nb_packets > MIN_FRAMES || is->subtitle_stream < 0 || is->subtitleq.abort_request)))) {
2980             /* wait 10 ms */
2981             SDL_LockMutex(wait_mutex);
2982             SDL_CondWaitTimeout(is->continue_read_thread, wait_mutex, 10);
2983             SDL_UnlockMutex(wait_mutex);
2984             continue;
2985         }
2986         if (!is->paused &&
2987             (!is->audio_st || (is->auddec.finished == is->audioq.serial && frame_queue_nb_remaining(&is->sampq) == 0)) &&
2988             (!is->video_st || (is->viddec.finished == is->videoq.serial && frame_queue_nb_remaining(&is->pictq) == 0))) {
2989             if (loop != 1 && (!loop || --loop)) {
2990                 stream_seek(is, start_time != AV_NOPTS_VALUE ? start_time : 0, 0, 0);
2991             } else if (autoexit) {
2992                 ret = AVERROR_EOF;
2993                 goto fail;
2994             }
2995         }
2996         ret = av_read_frame(ic, pkt);
2997         if (ret < 0) {
2998             if ((ret == AVERROR_EOF || avio_feof(ic->pb)) && !is->eof) {
2999                 if (is->video_stream >= 0)
3000                     packet_queue_put_nullpacket(&is->videoq, is->video_stream);
3001                 if (is->audio_stream >= 0)
3002                     packet_queue_put_nullpacket(&is->audioq, is->audio_stream);
3003                 if (is->subtitle_stream >= 0)
3004                     packet_queue_put_nullpacket(&is->subtitleq, is->subtitle_stream);
3005                 is->eof = 1;
3006             }
3007             if (ic->pb && ic->pb->error)
3008                 break;
3009             SDL_LockMutex(wait_mutex);
3010             SDL_CondWaitTimeout(is->continue_read_thread, wait_mutex, 10);
3011             SDL_UnlockMutex(wait_mutex);
3012             continue;
3013         } else {
3014             is->eof = 0;
3015         }
3016         /* check if packet is in play range specified by user, then queue, otherwise discard */
3017         stream_start_time = ic->streams[pkt->stream_index]->start_time;
3018         pkt_ts = pkt->pts == AV_NOPTS_VALUE ? pkt->dts : pkt->pts;
3019         pkt_in_play_range = duration == AV_NOPTS_VALUE ||
3020                 (pkt_ts - (stream_start_time != AV_NOPTS_VALUE ? stream_start_time : 0)) *
3021                 av_q2d(ic->streams[pkt->stream_index]->time_base) -
3022                 (double)(start_time != AV_NOPTS_VALUE ? start_time : 0) / 1000000
3023                 <= ((double)duration / 1000000);
3024         if (pkt->stream_index == is->audio_stream && pkt_in_play_range) {
3025             packet_queue_put(&is->audioq, pkt);
3026         } else if (pkt->stream_index == is->video_stream && pkt_in_play_range
3027                    && !(is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
3028             packet_queue_put(&is->videoq, pkt);
3029         } else if (pkt->stream_index == is->subtitle_stream && pkt_in_play_range) {
3030             packet_queue_put(&is->subtitleq, pkt);
3031         } else {
3032             av_free_packet(pkt);
3033         }
3034     }
3035     /* wait until the end */
3036     while (!is->abort_request) {
3037         SDL_Delay(100);
3038     }
3039
3040     ret = 0;
3041  fail:
3042     /* close each stream */
3043     if (is->audio_stream >= 0)
3044         stream_component_close(is, is->audio_stream);
3045     if (is->video_stream >= 0)
3046         stream_component_close(is, is->video_stream);
3047     if (is->subtitle_stream >= 0)
3048         stream_component_close(is, is->subtitle_stream);
3049     if (ic) {
3050         avformat_close_input(&ic);
3051         is->ic = NULL;
3052     }
3053
3054     if (ret != 0) {
3055         SDL_Event event;
3056
3057         event.type = FF_QUIT_EVENT;
3058         event.user.data1 = is;
3059         SDL_PushEvent(&event);
3060     }
3061     SDL_DestroyMutex(wait_mutex);
3062     return 0;
3063 }
3064
3065 static VideoState *stream_open(const char *filename, AVInputFormat *iformat)
3066 {
3067     VideoState *is;
3068
3069     is = av_mallocz(sizeof(VideoState));
3070     if (!is)
3071         return NULL;
3072     av_strlcpy(is->filename, filename, sizeof(is->filename));
3073     is->iformat = iformat;
3074     is->ytop    = 0;
3075     is->xleft   = 0;
3076
3077     /* start video display */
3078     if (frame_queue_init(&is->pictq, &is->videoq, VIDEO_PICTURE_QUEUE_SIZE, 1) < 0)
3079         goto fail;
3080     if (frame_queue_init(&is->subpq, &is->subtitleq, SUBPICTURE_QUEUE_SIZE, 0) < 0)
3081         goto fail;
3082     if (frame_queue_init(&is->sampq, &is->audioq, SAMPLE_QUEUE_SIZE, 1) < 0)
3083         goto fail;
3084
3085     packet_queue_init(&is->videoq);
3086     packet_queue_init(&is->audioq);
3087     packet_queue_init(&is->subtitleq);
3088
3089     is->continue_read_thread = SDL_CreateCond();
3090
3091     init_clock(&is->vidclk, &is->videoq.serial);
3092     init_clock(&is->audclk, &is->audioq.serial);
3093     init_clock(&is->extclk, &is->extclk.serial);
3094     is->audio_clock_serial = -1;
3095     is->av_sync_type = av_sync_type;
3096     is->read_tid     = SDL_CreateThread(read_thread, is);
3097     if (!is->read_tid) {
3098 fail:
3099         stream_close(is);
3100         return NULL;
3101     }
3102     return is;
3103 }
3104
3105 static void stream_cycle_channel(VideoState *is, int codec_type)
3106 {
3107     AVFormatContext *ic = is->ic;
3108     int start_index, stream_index;
3109     int old_index;
3110     AVStream *st;
3111     AVProgram *p = NULL;
3112     int nb_streams = is->ic->nb_streams;
3113
3114     if (codec_type == AVMEDIA_TYPE_VIDEO) {
3115         start_index = is->last_video_stream;
3116         old_index = is->video_stream;
3117     } else if (codec_type == AVMEDIA_TYPE_AUDIO) {
3118         start_index = is->last_audio_stream;
3119         old_index = is->audio_stream;
3120     } else {
3121         start_index = is->last_subtitle_stream;
3122         old_index = is->subtitle_stream;
3123     }
3124     stream_index = start_index;
3125
3126     if (codec_type != AVMEDIA_TYPE_VIDEO && is->video_stream != -1) {
3127         p = av_find_program_from_stream(ic, NULL, is->video_stream);
3128         if (p) {
3129             nb_streams = p->nb_stream_indexes;
3130             for (start_index = 0; start_index < nb_streams; start_index++)
3131                 if (p->stream_index[start_index] == stream_index)
3132                     break;
3133             if (start_index == nb_streams)
3134                 start_index = -1;
3135             stream_index = start_index;
3136         }
3137     }
3138
3139     for (;;) {
3140         if (++stream_index >= nb_streams)
3141         {
3142             if (codec_type == AVMEDIA_TYPE_SUBTITLE)
3143             {
3144                 stream_index = -1;
3145                 is->last_subtitle_stream = -1;
3146                 goto the_end;
3147             }
3148             if (start_index == -1)
3149                 return;
3150             stream_index = 0;
3151         }
3152         if (stream_index == start_index)
3153             return;
3154         st = is->ic->streams[p ? p->stream_index[stream_index] : stream_index];
3155         if (st->codec->codec_type == codec_type) {
3156             /* check that parameters are OK */
3157             switch (codec_type) {
3158             case AVMEDIA_TYPE_AUDIO:
3159                 if (st->codec->sample_rate != 0 &&
3160                     st->codec->channels != 0)
3161                     goto the_end;
3162                 break;
3163             case AVMEDIA_TYPE_VIDEO:
3164             case AVMEDIA_TYPE_SUBTITLE:
3165                 goto the_end;
3166             default:
3167                 break;
3168             }
3169         }
3170     }
3171  the_end:
3172     if (p && stream_index != -1)
3173         stream_index = p->stream_index[stream_index];
3174     av_log(NULL, AV_LOG_INFO, "Switch %s stream from #%d to #%d\n",
3175            av_get_media_type_string(codec_type),
3176            old_index,
3177            stream_index);
3178
3179     stream_component_close(is, old_index);
3180     stream_component_open(is, stream_index);
3181 }
3182
3183
3184 static void toggle_full_screen(VideoState *is)
3185 {
3186 #if defined(__APPLE__) && SDL_VERSION_ATLEAST(1, 2, 14)
3187     /* OS X needs to reallocate the SDL overlays */
3188     int i;
3189     for (i = 0; i < VIDEO_PICTURE_QUEUE_SIZE; i++)
3190         is->pictq.queue[i].reallocate = 1;
3191 #endif
3192     is_full_screen = !is_full_screen;
3193     video_open(is, 1, NULL);
3194 }
3195
3196 static void toggle_audio_display(VideoState *is)
3197 {
3198     int bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
3199     int next = is->show_mode;
3200     do {
3201         next = (next + 1) % SHOW_MODE_NB;
3202     } while (next != is->show_mode && (next == SHOW_MODE_VIDEO && !is->video_st || next != SHOW_MODE_VIDEO && !is->audio_st));
3203     if (is->show_mode != next) {
3204         fill_rectangle(screen,
3205                     is->xleft, is->ytop, is->width, is->height,
3206                     bgcolor, 1);
3207         is->force_refresh = 1;
3208         is->show_mode = next;
3209     }
3210 }
3211
3212 static void refresh_loop_wait_event(VideoState *is, SDL_Event *event) {
3213     double remaining_time = 0.0;
3214     SDL_PumpEvents();
3215     while (!SDL_PeepEvents(event, 1, SDL_GETEVENT, SDL_ALLEVENTS)) {
3216         if (!cursor_hidden && av_gettime_relative() - cursor_last_shown > CURSOR_HIDE_DELAY) {
3217             SDL_ShowCursor(0);
3218             cursor_hidden = 1;
3219         }
3220         if (remaining_time > 0.0)
3221             av_usleep((int64_t)(remaining_time * 1000000.0));
3222         remaining_time = REFRESH_RATE;
3223         if (is->show_mode != SHOW_MODE_NONE && (!is->paused || is->force_refresh))
3224             video_refresh(is, &remaining_time);
3225         SDL_PumpEvents();
3226     }
3227 }
3228
3229 static void seek_chapter(VideoState *is, int incr)
3230 {
3231     int64_t pos = get_master_clock(is) * AV_TIME_BASE;
3232     int i;
3233
3234     if (!is->ic->nb_chapters)
3235         return;
3236
3237     /* find the current chapter */
3238     for (i = 0; i < is->ic->nb_chapters; i++) {
3239         AVChapter *ch = is->ic->chapters[i];
3240         if (av_compare_ts(pos, AV_TIME_BASE_Q, ch->start, ch->time_base) < 0) {
3241             i--;
3242             break;
3243         }
3244     }
3245
3246     i += incr;
3247     i = FFMAX(i, 0);
3248     if (i >= is->ic->nb_chapters)
3249         return;
3250
3251     av_log(NULL, AV_LOG_VERBOSE, "Seeking to chapter %d.\n", i);
3252     stream_seek(is, av_rescale_q(is->ic->chapters[i]->start, is->ic->chapters[i]->time_base,
3253                                  AV_TIME_BASE_Q), 0, 0);
3254 }
3255
3256 /* handle an event sent by the GUI */
3257 static void event_loop(VideoState *cur_stream)
3258 {
3259     SDL_Event event;
3260     double incr, pos, frac;
3261
3262     for (;;) {
3263         double x;
3264         refresh_loop_wait_event(cur_stream, &event);
3265         switch (event.type) {
3266         case SDL_KEYDOWN:
3267             if (exit_on_keydown) {
3268                 do_exit(cur_stream);
3269                 break;
3270             }
3271             switch (event.key.keysym.sym) {
3272             case SDLK_ESCAPE:
3273             case SDLK_q:
3274                 do_exit(cur_stream);
3275                 break;
3276             case SDLK_f:
3277                 toggle_full_screen(cur_stream);
3278                 cur_stream->force_refresh = 1;
3279                 break;
3280             case SDLK_p:
3281             case SDLK_SPACE:
3282                 toggle_pause(cur_stream);
3283                 break;
3284             case SDLK_s: // S: Step to next frame
3285                 step_to_next_frame(cur_stream);
3286                 break;
3287             case SDLK_a:
3288                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_AUDIO);
3289                 break;
3290             case SDLK_v:
3291                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_VIDEO);
3292                 break;
3293             case SDLK_c:
3294                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_VIDEO);
3295                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_AUDIO);
3296                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_SUBTITLE);
3297                 break;
3298             case SDLK_t:
3299                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_SUBTITLE);
3300                 break;
3301             case SDLK_w:
3302 #if CONFIG_AVFILTER
3303                 if (cur_stream->show_mode == SHOW_MODE_VIDEO && cur_stream->vfilter_idx < nb_vfilters - 1) {
3304                     if (++cur_stream->vfilter_idx >= nb_vfilters)
3305                         cur_stream->vfilter_idx = 0;
3306                 } else {
3307                     cur_stream->vfilter_idx = 0;
3308                     toggle_audio_display(cur_stream);
3309                 }
3310 #else
3311                 toggle_audio_display(cur_stream);
3312 #endif
3313                 break;
3314             case SDLK_PAGEUP:
3315                 if (cur_stream->ic->nb_chapters <= 1) {
3316                     incr = 600.0;
3317                     goto do_seek;
3318                 }
3319                 seek_chapter(cur_stream, 1);
3320                 break;
3321             case SDLK_PAGEDOWN:
3322                 if (cur_stream->ic->nb_chapters <= 1) {
3323                     incr = -600.0;
3324                     goto do_seek;
3325                 }
3326                 seek_chapter(cur_stream, -1);
3327                 break;
3328             case SDLK_LEFT:
3329                 incr = -10.0;
3330                 goto do_seek;
3331             case SDLK_RIGHT:
3332                 incr = 10.0;
3333                 goto do_seek;
3334             case SDLK_UP:
3335                 incr = 60.0;
3336                 goto do_seek;
3337             case SDLK_DOWN:
3338                 incr = -60.0;
3339             do_seek:
3340                     if (seek_by_bytes) {
3341                         pos = -1;
3342                         if (pos < 0 && cur_stream->video_stream >= 0)
3343                             pos = frame_queue_last_pos(&cur_stream->pictq);
3344                         if (pos < 0 && cur_stream->audio_stream >= 0)
3345                             pos = frame_queue_last_pos(&cur_stream->sampq);
3346                         if (pos < 0)
3347                             pos = avio_tell(cur_stream->ic->pb);
3348                         if (cur_stream->ic->bit_rate)
3349                             incr *= cur_stream->ic->bit_rate / 8.0;
3350                         else
3351                             incr *= 180000.0;
3352                         pos += incr;
3353                         stream_seek(cur_stream, pos, incr, 1);
3354                     } else {
3355                         pos = get_master_clock(cur_stream);
3356                         if (isnan(pos))
3357                             pos = (double)cur_stream->seek_pos / AV_TIME_BASE;
3358                         pos += incr;
3359                         if (cur_stream->ic->start_time != AV_NOPTS_VALUE && pos < cur_stream->ic->start_time / (double)AV_TIME_BASE)
3360                             pos = cur_stream->ic->start_time / (double)AV_TIME_BASE;
3361                         stream_seek(cur_stream, (int64_t)(pos * AV_TIME_BASE), (int64_t)(incr * AV_TIME_BASE), 0);
3362                     }
3363                 break;
3364             default:
3365                 break;
3366             }
3367             break;
3368         case SDL_VIDEOEXPOSE:
3369             cur_stream->force_refresh = 1;
3370             break;
3371         case SDL_MOUSEBUTTONDOWN:
3372             if (exit_on_mousedown) {
3373                 do_exit(cur_stream);
3374                 break;
3375             }
3376         case SDL_MOUSEMOTION:
3377             if (cursor_hidden) {
3378                 SDL_ShowCursor(1);
3379                 cursor_hidden = 0;
3380             }
3381             cursor_last_shown = av_gettime_relative();
3382             if (event.type == SDL_MOUSEBUTTONDOWN) {
3383                 x = event.button.x;
3384             } else {
3385                 if (event.motion.state != SDL_PRESSED)
3386                     break;
3387                 x = event.motion.x;
3388             }
3389                 if (seek_by_bytes || cur_stream->ic->duration <= 0) {
3390                     uint64_t size =  avio_size(cur_stream->ic->pb);
3391                     stream_seek(cur_stream, size*x/cur_stream->width, 0, 1);
3392                 } else {
3393                     int64_t ts;
3394                     int ns, hh, mm, ss;
3395                     int tns, thh, tmm, tss;
3396                     tns  = cur_stream->ic->duration / 1000000LL;
3397                     thh  = tns / 3600;
3398                     tmm  = (tns % 3600) / 60;
3399                     tss  = (tns % 60);
3400                     frac = x / cur_stream->width;
3401                     ns   = frac * tns;
3402                     hh   = ns / 3600;
3403                     mm   = (ns % 3600) / 60;
3404                     ss   = (ns % 60);
3405                     av_log(NULL, AV_LOG_INFO,
3406                            "Seek to %2.0f%% (%2d:%02d:%02d) of total duration (%2d:%02d:%02d)       \n", frac*100,
3407                             hh, mm, ss, thh, tmm, tss);
3408                     ts = frac * cur_stream->ic->duration;
3409                     if (cur_stream->ic->start_time != AV_NOPTS_VALUE)
3410                         ts += cur_stream->ic->start_time;
3411                     stream_seek(cur_stream, ts, 0, 0);
3412                 }
3413             break;
3414         case SDL_VIDEORESIZE:
3415                 screen = SDL_SetVideoMode(FFMIN(16383, event.resize.w), event.resize.h, 0,
3416                                           SDL_HWSURFACE|(is_full_screen?SDL_FULLSCREEN:SDL_RESIZABLE)|SDL_ASYNCBLIT|SDL_HWACCEL);
3417                 if (!screen) {
3418                     av_log(NULL, AV_LOG_FATAL, "Failed to set video mode\n");
3419                     do_exit(cur_stream);
3420                 }
3421                 screen_width  = cur_stream->width  = screen->w;
3422                 screen_height = cur_stream->height = screen->h;
3423                 cur_stream->force_refresh = 1;
3424             break;
3425         case SDL_QUIT:
3426         case FF_QUIT_EVENT:
3427             do_exit(cur_stream);
3428             break;
3429         case FF_ALLOC_EVENT:
3430             alloc_picture(event.user.data1);
3431             break;
3432         default:
3433             break;
3434         }
3435     }
3436 }
3437
3438 static int opt_frame_size(void *optctx, const char *opt, const char *arg)
3439 {
3440     av_log(NULL, AV_LOG_WARNING, "Option -s is deprecated, use -video_size.\n");
3441     return opt_default(NULL, "video_size", arg);
3442 }
3443
3444 static int opt_width(void *optctx, const char *opt, const char *arg)
3445 {
3446     screen_width = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
3447     return 0;
3448 }
3449
3450 static int opt_height(void *optctx, const char *opt, const char *arg)
3451 {
3452     screen_height = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
3453     return 0;
3454 }
3455
3456 static int opt_format(void *optctx, const char *opt, const char *arg)
3457 {
3458     file_iformat = av_find_input_format(arg);
3459     if (!file_iformat) {
3460         av_log(NULL, AV_LOG_FATAL, "Unknown input format: %s\n", arg);
3461         return AVERROR(EINVAL);
3462     }
3463     return 0;
3464 }
3465
3466 static int opt_frame_pix_fmt(void *optctx, const char *opt, const char *arg)
3467 {
3468     av_log(NULL, AV_LOG_WARNING, "Option -pix_fmt is deprecated, use -pixel_format.\n");
3469     return opt_default(NULL, "pixel_format", arg);
3470 }
3471
3472 static int opt_sync(void *optctx, const char *opt, const char *arg)
3473 {
3474     if (!strcmp(arg, "audio"))
3475         av_sync_type = AV_SYNC_AUDIO_MASTER;
3476     else if (!strcmp(arg, "video"))
3477         av_sync_type = AV_SYNC_VIDEO_MASTER;
3478     else if (!strcmp(arg, "ext"))
3479         av_sync_type = AV_SYNC_EXTERNAL_CLOCK;
3480     else {
3481         av_log(NULL, AV_LOG_ERROR, "Unknown value for %s: %s\n", opt, arg);
3482         exit(1);
3483     }
3484     return 0;
3485 }
3486
3487 static int opt_seek(void *optctx, const char *opt, const char *arg)
3488 {
3489     start_time = parse_time_or_die(opt, arg, 1);
3490     return 0;
3491 }
3492
3493 static int opt_duration(void *optctx, const char *opt, const char *arg)
3494 {
3495     duration = parse_time_or_die(opt, arg, 1);
3496     return 0;
3497 }
3498
3499 static int opt_show_mode(void *optctx, const char *opt, const char *arg)
3500 {
3501     show_mode = !strcmp(arg, "video") ? SHOW_MODE_VIDEO :
3502                 !strcmp(arg, "waves") ? SHOW_MODE_WAVES :
3503                 !strcmp(arg, "rdft" ) ? SHOW_MODE_RDFT  :
3504                 parse_number_or_die(opt, arg, OPT_INT, 0, SHOW_MODE_NB-1);
3505     return 0;
3506 }
3507
3508 static void opt_input_file(void *optctx, const char *filename)
3509 {
3510     if (input_filename) {
3511         av_log(NULL, AV_LOG_FATAL,
3512                "Argument '%s' provided as input filename, but '%s' was already specified.\n",
3513                 filename, input_filename);
3514         exit(1);
3515     }
3516     if (!strcmp(filename, "-"))
3517         filename = "pipe:";
3518     input_filename = filename;
3519 }
3520
3521 static int opt_codec(void *optctx, const char *opt, const char *arg)
3522 {
3523    const char *spec = strchr(opt, ':');
3524    if (!spec) {
3525        av_log(NULL, AV_LOG_ERROR,
3526               "No media specifier was specified in '%s' in option '%s'\n",
3527                arg, opt);
3528        return AVERROR(EINVAL);
3529    }
3530    spec++;
3531    switch (spec[0]) {
3532    case 'a' :    audio_codec_name = arg; break;
3533    case 's' : subtitle_codec_name = arg; break;
3534    case 'v' :    video_codec_name = arg; break;
3535    default:
3536        av_log(NULL, AV_LOG_ERROR,
3537               "Invalid media specifier '%s' in option '%s'\n", spec, opt);
3538        return AVERROR(EINVAL);
3539    }
3540    return 0;
3541 }
3542
3543 static int dummy;
3544
3545 static const OptionDef options[] = {
3546 #include "cmdutils_common_opts.h"
3547     { "x", HAS_ARG, { .func_arg = opt_width }, "force displayed width", "width" },
3548     { "y", HAS_ARG, { .func_arg = opt_height }, "force displayed height", "height" },
3549     { "s", HAS_ARG | OPT_VIDEO, { .func_arg = opt_frame_size }, "set frame size (WxH or abbreviation)", "size" },
3550     { "fs", OPT_BOOL, { &is_full_screen }, "force full screen" },
3551     { "an", OPT_BOOL, { &audio_disable }, "disable audio" },
3552     { "vn", OPT_BOOL, { &video_disable }, "disable video" },
3553     { "sn", OPT_BOOL, { &subtitle_disable }, "disable subtitling" },
3554     { "ast", OPT_STRING | HAS_ARG | OPT_EXPERT, { &wanted_stream_spec[AVMEDIA_TYPE_AUDIO] }, "select desired audio stream", "stream_specifier" },
3555     { "vst", OPT_STRING | HAS_ARG | OPT_EXPERT, { &wanted_stream_spec[AVMEDIA_TYPE_VIDEO] }, "select desired video stream", "stream_specifier" },
3556     { "sst", OPT_STRING | HAS_ARG | OPT_EXPERT, { &wanted_stream_spec[AVMEDIA_TYPE_SUBTITLE] }, "select desired subtitle stream", "stream_specifier" },
3557     { "ss", HAS_ARG, { .func_arg = opt_seek }, "seek to a given position in seconds", "pos" },
3558     { "t", HAS_ARG, { .func_arg = opt_duration }, "play  \"duration\" seconds of audio/video", "duration" },
3559     { "bytes", OPT_INT | HAS_ARG, { &seek_by_bytes }, "seek by bytes 0=off 1=on -1=auto", "val" },
3560     { "nodisp", OPT_BOOL, { &display_disable }, "disable graphical display" },
3561     { "f", HAS_ARG, { .func_arg = opt_format }, "force format", "fmt" },
3562     { "pix_fmt", HAS_ARG | OPT_EXPERT | OPT_VIDEO, { .func_arg = opt_frame_pix_fmt }, "set pixel format", "format" },
3563     { "stats", OPT_BOOL | OPT_EXPERT, { &show_status }, "show status", "" },
3564     { "fast", OPT_BOOL | OPT_EXPERT, { &fast }, "non spec compliant optimizations", "" },
3565     { "genpts", OPT_BOOL | OPT_EXPERT, { &genpts }, "generate pts", "" },
3566     { "drp", OPT_INT | HAS_ARG | OPT_EXPERT, { &decoder_reorder_pts }, "let decoder reorder pts 0=off 1=on -1=auto", ""},
3567     { "lowres", OPT_INT | HAS_ARG | OPT_EXPERT, { &lowres }, "", "" },
3568     { "sync", HAS_ARG | OPT_EXPERT, { .func_arg = opt_sync }, "set audio-video sync. type (type=audio/video/ext)", "type" },
3569     { "autoexit", OPT_BOOL | OPT_EXPERT, { &autoexit }, "exit at the end", "" },
3570     { "exitonkeydown", OPT_BOOL | OPT_EXPERT, { &exit_on_keydown }, "exit on key down", "" },
3571     { "exitonmousedown", OPT_BOOL | OPT_EXPERT, { &exit_on_mousedown }, "exit on mouse down", "" },
3572     { "loop", OPT_INT | HAS_ARG | OPT_EXPERT, { &loop }, "set number of times the playback shall be looped", "loop count" },
3573     { "framedrop", OPT_BOOL | OPT_EXPERT, { &framedrop }, "drop frames when cpu is too slow", "" },
3574     { "infbuf", OPT_BOOL | OPT_EXPERT, { &infinite_buffer }, "don't limit the input buffer size (useful with realtime streams)", "" },
3575     { "window_title", OPT_STRING | HAS_ARG, { &window_title }, "set window title", "window title" },
3576 #if CONFIG_AVFILTER
3577     { "vf", OPT_EXPERT | HAS_ARG, { .func_arg = opt_add_vfilter }, "set video filters", "filter_graph" },
3578     { "af", OPT_STRING | HAS_ARG, { &afilters }, "set audio filters", "filter_graph" },
3579 #endif
3580     { "rdftspeed", OPT_INT | HAS_ARG| OPT_AUDIO | OPT_EXPERT, { &rdftspeed }, "rdft speed", "msecs" },
3581     { "showmode", HAS_ARG, { .func_arg = opt_show_mode}, "select show mode (0 = video, 1 = waves, 2 = RDFT)", "mode" },
3582     { "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, { .func_arg = opt_default }, "generic catch all option", "" },
3583     { "i", OPT_BOOL, { &dummy}, "read specified file", "input_file"},
3584     { "codec", HAS_ARG, { .func_arg = opt_codec}, "force decoder", "decoder_name" },
3585     { "acodec", HAS_ARG | OPT_STRING | OPT_EXPERT, {    &audio_codec_name }, "force audio decoder",    "decoder_name" },
3586     { "scodec", HAS_ARG | OPT_STRING | OPT_EXPERT, { &subtitle_codec_name }, "force subtitle decoder", "decoder_name" },
3587     { "vcodec", HAS_ARG | OPT_STRING | OPT_EXPERT, {    &video_codec_name }, "force video decoder",    "decoder_name" },
3588     { "autorotate", OPT_BOOL, { &autorotate }, "automatically rotate video", "" },
3589     { NULL, },
3590 };
3591
3592 static void show_usage(void)
3593 {
3594     av_log(NULL, AV_LOG_INFO, "Simple media player\n");
3595     av_log(NULL, AV_LOG_INFO, "usage: %s [options] input_file\n", program_name);
3596     av_log(NULL, AV_LOG_INFO, "\n");
3597 }
3598
3599 void show_help_default(const char *opt, const char *arg)
3600 {
3601     av_log_set_callback(log_callback_help);
3602     show_usage();
3603     show_help_options(options, "Main options:", 0, OPT_EXPERT, 0);
3604     show_help_options(options, "Advanced options:", OPT_EXPERT, 0, 0);
3605     printf("\n");
3606     show_help_children(avcodec_get_class(), AV_OPT_FLAG_DECODING_PARAM);
3607     show_help_children(avformat_get_class(), AV_OPT_FLAG_DECODING_PARAM);
3608 #if !CONFIG_AVFILTER
3609     show_help_children(sws_get_class(), AV_OPT_FLAG_ENCODING_PARAM);
3610 #else
3611     show_help_children(avfilter_get_class(), AV_OPT_FLAG_FILTERING_PARAM);
3612 #endif
3613     printf("\nWhile playing:\n"
3614            "q, ESC              quit\n"
3615            "f                   toggle full screen\n"
3616            "p, SPC              pause\n"
3617            "a                   cycle audio channel in the current program\n"
3618            "v                   cycle video channel\n"
3619            "t                   cycle subtitle channel in the current program\n"
3620            "c                   cycle program\n"
3621            "w                   cycle video filters or show modes\n"
3622            "s                   activate frame-step mode\n"
3623            "left/right          seek backward/forward 10 seconds\n"
3624            "down/up             seek backward/forward 1 minute\n"
3625            "page down/page up   seek backward/forward 10 minutes\n"
3626            "mouse click         seek to percentage in file corresponding to fraction of width\n"
3627            );
3628 }
3629
3630 static int lockmgr(void **mtx, enum AVLockOp op)
3631 {
3632    switch(op) {
3633       case AV_LOCK_CREATE:
3634           *mtx = SDL_CreateMutex();
3635           if(!*mtx)
3636               return 1;
3637           return 0;
3638       case AV_LOCK_OBTAIN:
3639           return !!SDL_LockMutex(*mtx);
3640       case AV_LOCK_RELEASE:
3641           return !!SDL_UnlockMutex(*mtx);
3642       case AV_LOCK_DESTROY:
3643           SDL_DestroyMutex(*mtx);
3644           return 0;
3645    }
3646    return 1;
3647 }
3648
3649 /* Called from the main */
3650 int main(int argc, char **argv)
3651 {
3652     int flags;
3653     VideoState *is;
3654     char dummy_videodriver[] = "SDL_VIDEODRIVER=dummy";
3655
3656     av_log_set_flags(AV_LOG_SKIP_REPEATED);
3657     parse_loglevel(argc, argv, options);
3658
3659     /* register all codecs, demux and protocols */
3660 #if CONFIG_AVDEVICE
3661     avdevice_register_all();
3662 #endif
3663 #if CONFIG_AVFILTER
3664     avfilter_register_all();
3665 #endif
3666     av_register_all();
3667     avformat_network_init();
3668
3669     init_opts();
3670
3671     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
3672     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
3673
3674     show_banner(argc, argv, options);
3675
3676     parse_options(NULL, argc, argv, options, opt_input_file);
3677
3678     if (!input_filename) {
3679         show_usage();
3680         av_log(NULL, AV_LOG_FATAL, "An input file must be specified\n");
3681         av_log(NULL, AV_LOG_FATAL,
3682                "Use -h to get full help or, even better, run 'man %s'\n", program_name);
3683         exit(1);
3684     }
3685
3686     if (display_disable) {
3687         video_disable = 1;
3688     }
3689     flags = SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER;
3690     if (audio_disable)
3691         flags &= ~SDL_INIT_AUDIO;
3692     if (display_disable)
3693         SDL_putenv(dummy_videodriver); /* For the event queue, we always need a video driver. */
3694 #if !defined(_WIN32) && !defined(__APPLE__)
3695     flags |= SDL_INIT_EVENTTHREAD; /* Not supported on Windows or Mac OS X */
3696 #endif
3697     if (SDL_Init (flags)) {
3698         av_log(NULL, AV_LOG_FATAL, "Could not initialize SDL - %s\n", SDL_GetError());
3699         av_log(NULL, AV_LOG_FATAL, "(Did you set the DISPLAY variable?)\n");
3700         exit(1);
3701     }
3702
3703     if (!display_disable) {
3704         const SDL_VideoInfo *vi = SDL_GetVideoInfo();
3705         fs_screen_width = vi->current_w;
3706         fs_screen_height = vi->current_h;
3707     }
3708
3709     SDL_EventState(SDL_ACTIVEEVENT, SDL_IGNORE);
3710     SDL_EventState(SDL_SYSWMEVENT, SDL_IGNORE);
3711     SDL_EventState(SDL_USEREVENT, SDL_IGNORE);
3712
3713     if (av_lockmgr_register(lockmgr)) {
3714         av_log(NULL, AV_LOG_FATAL, "Could not initialize lock manager!\n");
3715         do_exit(NULL);
3716     }
3717
3718     av_init_packet(&flush_pkt);
3719     flush_pkt.data = (uint8_t *)&flush_pkt;
3720
3721     is = stream_open(input_filename, file_iformat);
3722     if (!is) {
3723         av_log(NULL, AV_LOG_FATAL, "Failed to initialize VideoState!\n");
3724         do_exit(NULL);
3725     }
3726
3727     event_loop(is);
3728
3729     /* never returns */
3730
3731     return 0;
3732 }