ffmpeg: assert return value is initialized
[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/eval.h"
35 #include "libavutil/mathematics.h"
36 #include "libavutil/pixdesc.h"
37 #include "libavutil/imgutils.h"
38 #include "libavutil/dict.h"
39 #include "libavutil/parseutils.h"
40 #include "libavutil/samplefmt.h"
41 #include "libavutil/avassert.h"
42 #include "libavutil/time.h"
43 #include "libavformat/avformat.h"
44 #include "libavdevice/avdevice.h"
45 #include "libswscale/swscale.h"
46 #include "libavutil/opt.h"
47 #include "libavcodec/avfft.h"
48 #include "libswresample/swresample.h"
49
50 #if CONFIG_AVFILTER
51 # include "libavfilter/avfilter.h"
52 # include "libavfilter/buffersink.h"
53 # include "libavfilter/buffersrc.h"
54 #endif
55
56 #include <SDL.h>
57 #include <SDL_thread.h>
58
59 #include "cmdutils.h"
60
61 #include <assert.h>
62
63 const char program_name[] = "ffplay";
64 const int program_birth_year = 2003;
65
66 #define MAX_QUEUE_SIZE (15 * 1024 * 1024)
67 #define MIN_FRAMES 25
68 #define EXTERNAL_CLOCK_MIN_FRAMES 2
69 #define EXTERNAL_CLOCK_MAX_FRAMES 10
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 /* Step size for volume control */
77 #define SDL_VOLUME_STEP (SDL_MIX_MAXVOLUME / 50)
78
79 /* no AV sync correction is done if below the minimum AV sync threshold */
80 #define AV_SYNC_THRESHOLD_MIN 0.04
81 /* AV sync correction is done if above the maximum AV sync threshold */
82 #define AV_SYNC_THRESHOLD_MAX 0.1
83 /* If a frame duration is longer than this, it will not be duplicated to compensate AV sync */
84 #define AV_SYNC_FRAMEDUP_THRESHOLD 0.1
85 /* no AV correction is done if too big error */
86 #define AV_NOSYNC_THRESHOLD 10.0
87
88 /* maximum audio speed change to get correct sync */
89 #define SAMPLE_CORRECTION_PERCENT_MAX 10
90
91 /* external clock speed adjustment constants for realtime sources based on buffer fullness */
92 #define EXTERNAL_CLOCK_SPEED_MIN  0.900
93 #define EXTERNAL_CLOCK_SPEED_MAX  1.010
94 #define EXTERNAL_CLOCK_SPEED_STEP 0.001
95
96 /* we use about AUDIO_DIFF_AVG_NB A-V differences to make the average */
97 #define AUDIO_DIFF_AVG_NB   20
98
99 /* polls for possible required screen refresh at least this often, should be less than 1/fps */
100 #define REFRESH_RATE 0.01
101
102 /* NOTE: the size must be big enough to compensate the hardware audio buffersize size */
103 /* TODO: We assume that a decoded and resampled frame fits into this buffer */
104 #define SAMPLE_ARRAY_SIZE (8 * 65536)
105
106 #define CURSOR_HIDE_DELAY 1000000
107
108 #define USE_ONEPASS_SUBTITLE_RENDER 1
109
110 static unsigned sws_flags = SWS_BICUBIC;
111
112 typedef struct MyAVPacketList {
113     AVPacket pkt;
114     struct MyAVPacketList *next;
115     int serial;
116 } MyAVPacketList;
117
118 typedef struct PacketQueue {
119     MyAVPacketList *first_pkt, *last_pkt;
120     int nb_packets;
121     int size;
122     int64_t duration;
123     int abort_request;
124     int serial;
125     SDL_mutex *mutex;
126     SDL_cond *cond;
127 } PacketQueue;
128
129 #define VIDEO_PICTURE_QUEUE_SIZE 3
130 #define SUBPICTURE_QUEUE_SIZE 16
131 #define SAMPLE_QUEUE_SIZE 9
132 #define FRAME_QUEUE_SIZE FFMAX(SAMPLE_QUEUE_SIZE, FFMAX(VIDEO_PICTURE_QUEUE_SIZE, SUBPICTURE_QUEUE_SIZE))
133
134 typedef struct AudioParams {
135     int freq;
136     int channels;
137     int64_t channel_layout;
138     enum AVSampleFormat fmt;
139     int frame_size;
140     int bytes_per_sec;
141 } AudioParams;
142
143 typedef struct Clock {
144     double pts;           /* clock base */
145     double pts_drift;     /* clock base minus time at which we updated the clock */
146     double last_updated;
147     double speed;
148     int serial;           /* clock is based on a packet with this serial */
149     int paused;
150     int *queue_serial;    /* pointer to the current packet queue serial, used for obsolete clock detection */
151 } Clock;
152
153 /* Common struct for handling all types of decoded data and allocated render buffers. */
154 typedef struct Frame {
155     AVFrame *frame;
156     AVSubtitle sub;
157     int serial;
158     double pts;           /* presentation timestamp for the frame */
159     double duration;      /* estimated duration of the frame */
160     int64_t pos;          /* byte position of the frame in the input file */
161     SDL_Texture *bmp;
162     int allocated;
163     int width;
164     int height;
165     int format;
166     AVRational sar;
167     int uploaded;
168     int flip_v;
169 } Frame;
170
171 typedef struct FrameQueue {
172     Frame queue[FRAME_QUEUE_SIZE];
173     int rindex;
174     int windex;
175     int size;
176     int max_size;
177     int keep_last;
178     int rindex_shown;
179     SDL_mutex *mutex;
180     SDL_cond *cond;
181     PacketQueue *pktq;
182 } FrameQueue;
183
184 enum {
185     AV_SYNC_AUDIO_MASTER, /* default choice */
186     AV_SYNC_VIDEO_MASTER,
187     AV_SYNC_EXTERNAL_CLOCK, /* synchronize to an external clock */
188 };
189
190 typedef struct Decoder {
191     AVPacket pkt;
192     AVPacket pkt_temp;
193     PacketQueue *queue;
194     AVCodecContext *avctx;
195     int pkt_serial;
196     int finished;
197     int packet_pending;
198     SDL_cond *empty_queue_cond;
199     int64_t start_pts;
200     AVRational start_pts_tb;
201     int64_t next_pts;
202     AVRational next_pts_tb;
203     SDL_Thread *decoder_tid;
204 } Decoder;
205
206 typedef struct VideoState {
207     SDL_Thread *read_tid;
208     AVInputFormat *iformat;
209     int abort_request;
210     int force_refresh;
211     int paused;
212     int last_paused;
213     int queue_attachments_req;
214     int seek_req;
215     int seek_flags;
216     int64_t seek_pos;
217     int64_t seek_rel;
218     int read_pause_return;
219     AVFormatContext *ic;
220     int realtime;
221
222     Clock audclk;
223     Clock vidclk;
224     Clock extclk;
225
226     FrameQueue pictq;
227     FrameQueue subpq;
228     FrameQueue sampq;
229
230     Decoder auddec;
231     Decoder viddec;
232     Decoder subdec;
233
234     int audio_stream;
235
236     int av_sync_type;
237
238     double audio_clock;
239     int audio_clock_serial;
240     double audio_diff_cum; /* used for AV difference average computation */
241     double audio_diff_avg_coef;
242     double audio_diff_threshold;
243     int audio_diff_avg_count;
244     AVStream *audio_st;
245     PacketQueue audioq;
246     int audio_hw_buf_size;
247     uint8_t *audio_buf;
248     uint8_t *audio_buf1;
249     unsigned int audio_buf_size; /* in bytes */
250     unsigned int audio_buf1_size;
251     int audio_buf_index; /* in bytes */
252     int audio_write_buf_size;
253     int audio_volume;
254     int muted;
255     struct AudioParams audio_src;
256 #if CONFIG_AVFILTER
257     struct AudioParams audio_filter_src;
258 #endif
259     struct AudioParams audio_tgt;
260     struct SwrContext *swr_ctx;
261     int frame_drops_early;
262     int frame_drops_late;
263
264     enum ShowMode {
265         SHOW_MODE_NONE = -1, SHOW_MODE_VIDEO = 0, SHOW_MODE_WAVES, SHOW_MODE_RDFT, SHOW_MODE_NB
266     } show_mode;
267     int16_t sample_array[SAMPLE_ARRAY_SIZE];
268     int sample_array_index;
269     int last_i_start;
270     RDFTContext *rdft;
271     int rdft_bits;
272     FFTSample *rdft_data;
273     int xpos;
274     double last_vis_time;
275     SDL_Texture *vis_texture;
276     SDL_Texture *sub_texture;
277
278     int subtitle_stream;
279     AVStream *subtitle_st;
280     PacketQueue subtitleq;
281
282     double frame_timer;
283     double frame_last_returned_time;
284     double frame_last_filter_delay;
285     int video_stream;
286     AVStream *video_st;
287     PacketQueue videoq;
288     double max_frame_duration;      // maximum duration of a frame - above this, we consider the jump a timestamp discontinuity
289     struct SwsContext *img_convert_ctx;
290     struct SwsContext *sub_convert_ctx;
291     int eof;
292
293     char *filename;
294     int width, height, xleft, ytop;
295     int step;
296
297 #if CONFIG_AVFILTER
298     int vfilter_idx;
299     AVFilterContext *in_video_filter;   // the first filter in the video chain
300     AVFilterContext *out_video_filter;  // the last filter in the video chain
301     AVFilterContext *in_audio_filter;   // the first filter in the audio chain
302     AVFilterContext *out_audio_filter;  // the last filter in the audio chain
303     AVFilterGraph *agraph;              // audio filter graph
304 #endif
305
306     int last_video_stream, last_audio_stream, last_subtitle_stream;
307
308     SDL_cond *continue_read_thread;
309 } VideoState;
310
311 /* options specified by the user */
312 static AVInputFormat *file_iformat;
313 static const char *input_filename;
314 static const char *window_title;
315 static int default_width  = 640;
316 static int default_height = 480;
317 static int screen_width  = 0;
318 static int screen_height = 0;
319 static int audio_disable;
320 static int video_disable;
321 static int subtitle_disable;
322 static const char* wanted_stream_spec[AVMEDIA_TYPE_NB] = {0};
323 static int seek_by_bytes = -1;
324 static int display_disable;
325 static int show_status = 1;
326 static int av_sync_type = AV_SYNC_AUDIO_MASTER;
327 static int64_t start_time = AV_NOPTS_VALUE;
328 static int64_t duration = AV_NOPTS_VALUE;
329 static int fast = 0;
330 static int genpts = 0;
331 static int lowres = 0;
332 static int decoder_reorder_pts = -1;
333 static int autoexit;
334 static int exit_on_keydown;
335 static int exit_on_mousedown;
336 static int loop = 1;
337 static int framedrop = -1;
338 static int infinite_buffer = -1;
339 static enum ShowMode show_mode = SHOW_MODE_NONE;
340 static const char *audio_codec_name;
341 static const char *subtitle_codec_name;
342 static const char *video_codec_name;
343 double rdftspeed = 0.02;
344 static int64_t cursor_last_shown;
345 static int cursor_hidden = 0;
346 #if CONFIG_AVFILTER
347 static const char **vfilters_list = NULL;
348 static int nb_vfilters = 0;
349 static char *afilters = NULL;
350 #endif
351 static int autorotate = 1;
352
353 /* current context */
354 static int is_full_screen;
355 static int64_t audio_callback_time;
356
357 static AVPacket flush_pkt;
358
359 #define FF_ALLOC_EVENT   (SDL_USEREVENT)
360 #define FF_QUIT_EVENT    (SDL_USEREVENT + 2)
361
362 static SDL_Window *window;
363 static SDL_Renderer *renderer;
364
365 #if CONFIG_AVFILTER
366 static int opt_add_vfilter(void *optctx, const char *opt, const char *arg)
367 {
368     GROW_ARRAY(vfilters_list, nb_vfilters);
369     vfilters_list[nb_vfilters - 1] = arg;
370     return 0;
371 }
372 #endif
373
374 static inline
375 int cmp_audio_fmts(enum AVSampleFormat fmt1, int64_t channel_count1,
376                    enum AVSampleFormat fmt2, int64_t channel_count2)
377 {
378     /* If channel count == 1, planar and non-planar formats are the same */
379     if (channel_count1 == 1 && channel_count2 == 1)
380         return av_get_packed_sample_fmt(fmt1) != av_get_packed_sample_fmt(fmt2);
381     else
382         return channel_count1 != channel_count2 || fmt1 != fmt2;
383 }
384
385 static inline
386 int64_t get_valid_channel_layout(int64_t channel_layout, int channels)
387 {
388     if (channel_layout && av_get_channel_layout_nb_channels(channel_layout) == channels)
389         return channel_layout;
390     else
391         return 0;
392 }
393
394 static void free_picture(Frame *vp);
395
396 static int packet_queue_put_private(PacketQueue *q, AVPacket *pkt)
397 {
398     MyAVPacketList *pkt1;
399
400     if (q->abort_request)
401        return -1;
402
403     pkt1 = av_malloc(sizeof(MyAVPacketList));
404     if (!pkt1)
405         return -1;
406     pkt1->pkt = *pkt;
407     pkt1->next = NULL;
408     if (pkt == &flush_pkt)
409         q->serial++;
410     pkt1->serial = q->serial;
411
412     if (!q->last_pkt)
413         q->first_pkt = pkt1;
414     else
415         q->last_pkt->next = pkt1;
416     q->last_pkt = pkt1;
417     q->nb_packets++;
418     q->size += pkt1->pkt.size + sizeof(*pkt1);
419     q->duration += pkt1->pkt.duration;
420     /* XXX: should duplicate packet data in DV case */
421     SDL_CondSignal(q->cond);
422     return 0;
423 }
424
425 static int packet_queue_put(PacketQueue *q, AVPacket *pkt)
426 {
427     int ret;
428
429     SDL_LockMutex(q->mutex);
430     ret = packet_queue_put_private(q, pkt);
431     SDL_UnlockMutex(q->mutex);
432
433     if (pkt != &flush_pkt && ret < 0)
434         av_packet_unref(pkt);
435
436     return ret;
437 }
438
439 static int packet_queue_put_nullpacket(PacketQueue *q, int stream_index)
440 {
441     AVPacket pkt1, *pkt = &pkt1;
442     av_init_packet(pkt);
443     pkt->data = NULL;
444     pkt->size = 0;
445     pkt->stream_index = stream_index;
446     return packet_queue_put(q, pkt);
447 }
448
449 /* packet queue handling */
450 static int packet_queue_init(PacketQueue *q)
451 {
452     memset(q, 0, sizeof(PacketQueue));
453     q->mutex = SDL_CreateMutex();
454     if (!q->mutex) {
455         av_log(NULL, AV_LOG_FATAL, "SDL_CreateMutex(): %s\n", SDL_GetError());
456         return AVERROR(ENOMEM);
457     }
458     q->cond = SDL_CreateCond();
459     if (!q->cond) {
460         av_log(NULL, AV_LOG_FATAL, "SDL_CreateCond(): %s\n", SDL_GetError());
461         return AVERROR(ENOMEM);
462     }
463     q->abort_request = 1;
464     return 0;
465 }
466
467 static void packet_queue_flush(PacketQueue *q)
468 {
469     MyAVPacketList *pkt, *pkt1;
470
471     SDL_LockMutex(q->mutex);
472     for (pkt = q->first_pkt; pkt; pkt = pkt1) {
473         pkt1 = pkt->next;
474         av_packet_unref(&pkt->pkt);
475         av_freep(&pkt);
476     }
477     q->last_pkt = NULL;
478     q->first_pkt = NULL;
479     q->nb_packets = 0;
480     q->size = 0;
481     q->duration = 0;
482     SDL_UnlockMutex(q->mutex);
483 }
484
485 static void packet_queue_destroy(PacketQueue *q)
486 {
487     packet_queue_flush(q);
488     SDL_DestroyMutex(q->mutex);
489     SDL_DestroyCond(q->cond);
490 }
491
492 static void packet_queue_abort(PacketQueue *q)
493 {
494     SDL_LockMutex(q->mutex);
495
496     q->abort_request = 1;
497
498     SDL_CondSignal(q->cond);
499
500     SDL_UnlockMutex(q->mutex);
501 }
502
503 static void packet_queue_start(PacketQueue *q)
504 {
505     SDL_LockMutex(q->mutex);
506     q->abort_request = 0;
507     packet_queue_put_private(q, &flush_pkt);
508     SDL_UnlockMutex(q->mutex);
509 }
510
511 /* return < 0 if aborted, 0 if no packet and > 0 if packet.  */
512 static int packet_queue_get(PacketQueue *q, AVPacket *pkt, int block, int *serial)
513 {
514     MyAVPacketList *pkt1;
515     int ret;
516
517     SDL_LockMutex(q->mutex);
518
519     for (;;) {
520         if (q->abort_request) {
521             ret = -1;
522             break;
523         }
524
525         pkt1 = q->first_pkt;
526         if (pkt1) {
527             q->first_pkt = pkt1->next;
528             if (!q->first_pkt)
529                 q->last_pkt = NULL;
530             q->nb_packets--;
531             q->size -= pkt1->pkt.size + sizeof(*pkt1);
532             q->duration -= pkt1->pkt.duration;
533             *pkt = pkt1->pkt;
534             if (serial)
535                 *serial = pkt1->serial;
536             av_free(pkt1);
537             ret = 1;
538             break;
539         } else if (!block) {
540             ret = 0;
541             break;
542         } else {
543             SDL_CondWait(q->cond, q->mutex);
544         }
545     }
546     SDL_UnlockMutex(q->mutex);
547     return ret;
548 }
549
550 static void decoder_init(Decoder *d, AVCodecContext *avctx, PacketQueue *queue, SDL_cond *empty_queue_cond) {
551     memset(d, 0, sizeof(Decoder));
552     d->avctx = avctx;
553     d->queue = queue;
554     d->empty_queue_cond = empty_queue_cond;
555     d->start_pts = AV_NOPTS_VALUE;
556 }
557
558 static int decoder_decode_frame(Decoder *d, AVFrame *frame, AVSubtitle *sub) {
559     int got_frame = 0;
560
561     do {
562         int ret = -1;
563
564         if (d->queue->abort_request)
565             return -1;
566
567         if (!d->packet_pending || d->queue->serial != d->pkt_serial) {
568             AVPacket pkt;
569             do {
570                 if (d->queue->nb_packets == 0)
571                     SDL_CondSignal(d->empty_queue_cond);
572                 if (packet_queue_get(d->queue, &pkt, 1, &d->pkt_serial) < 0)
573                     return -1;
574                 if (pkt.data == flush_pkt.data) {
575                     avcodec_flush_buffers(d->avctx);
576                     d->finished = 0;
577                     d->next_pts = d->start_pts;
578                     d->next_pts_tb = d->start_pts_tb;
579                 }
580             } while (pkt.data == flush_pkt.data || d->queue->serial != d->pkt_serial);
581             av_packet_unref(&d->pkt);
582             d->pkt_temp = d->pkt = pkt;
583             d->packet_pending = 1;
584         }
585
586         switch (d->avctx->codec_type) {
587             case AVMEDIA_TYPE_VIDEO:
588                 ret = avcodec_decode_video2(d->avctx, frame, &got_frame, &d->pkt_temp);
589                 if (got_frame) {
590                     if (decoder_reorder_pts == -1) {
591                         frame->pts = av_frame_get_best_effort_timestamp(frame);
592                     } else if (!decoder_reorder_pts) {
593                         frame->pts = frame->pkt_dts;
594                     }
595                 }
596                 break;
597             case AVMEDIA_TYPE_AUDIO:
598                 ret = avcodec_decode_audio4(d->avctx, frame, &got_frame, &d->pkt_temp);
599                 if (got_frame) {
600                     AVRational tb = (AVRational){1, frame->sample_rate};
601                     if (frame->pts != AV_NOPTS_VALUE)
602                         frame->pts = av_rescale_q(frame->pts, av_codec_get_pkt_timebase(d->avctx), tb);
603                     else if (d->next_pts != AV_NOPTS_VALUE)
604                         frame->pts = av_rescale_q(d->next_pts, d->next_pts_tb, tb);
605                     if (frame->pts != AV_NOPTS_VALUE) {
606                         d->next_pts = frame->pts + frame->nb_samples;
607                         d->next_pts_tb = tb;
608                     }
609                 }
610                 break;
611             case AVMEDIA_TYPE_SUBTITLE:
612                 ret = avcodec_decode_subtitle2(d->avctx, sub, &got_frame, &d->pkt_temp);
613                 break;
614         }
615
616         if (ret < 0) {
617             d->packet_pending = 0;
618         } else {
619             d->pkt_temp.dts =
620             d->pkt_temp.pts = AV_NOPTS_VALUE;
621             if (d->pkt_temp.data) {
622                 if (d->avctx->codec_type != AVMEDIA_TYPE_AUDIO)
623                     ret = d->pkt_temp.size;
624                 d->pkt_temp.data += ret;
625                 d->pkt_temp.size -= ret;
626                 if (d->pkt_temp.size <= 0)
627                     d->packet_pending = 0;
628             } else {
629                 if (!got_frame) {
630                     d->packet_pending = 0;
631                     d->finished = d->pkt_serial;
632                 }
633             }
634         }
635     } while (!got_frame && !d->finished);
636
637     return got_frame;
638 }
639
640 static void decoder_destroy(Decoder *d) {
641     av_packet_unref(&d->pkt);
642     avcodec_free_context(&d->avctx);
643 }
644
645 static void frame_queue_unref_item(Frame *vp)
646 {
647     av_frame_unref(vp->frame);
648     avsubtitle_free(&vp->sub);
649 }
650
651 static int frame_queue_init(FrameQueue *f, PacketQueue *pktq, int max_size, int keep_last)
652 {
653     int i;
654     memset(f, 0, sizeof(FrameQueue));
655     if (!(f->mutex = SDL_CreateMutex())) {
656         av_log(NULL, AV_LOG_FATAL, "SDL_CreateMutex(): %s\n", SDL_GetError());
657         return AVERROR(ENOMEM);
658     }
659     if (!(f->cond = SDL_CreateCond())) {
660         av_log(NULL, AV_LOG_FATAL, "SDL_CreateCond(): %s\n", SDL_GetError());
661         return AVERROR(ENOMEM);
662     }
663     f->pktq = pktq;
664     f->max_size = FFMIN(max_size, FRAME_QUEUE_SIZE);
665     f->keep_last = !!keep_last;
666     for (i = 0; i < f->max_size; i++)
667         if (!(f->queue[i].frame = av_frame_alloc()))
668             return AVERROR(ENOMEM);
669     return 0;
670 }
671
672 static void frame_queue_destory(FrameQueue *f)
673 {
674     int i;
675     for (i = 0; i < f->max_size; i++) {
676         Frame *vp = &f->queue[i];
677         frame_queue_unref_item(vp);
678         av_frame_free(&vp->frame);
679         free_picture(vp);
680     }
681     SDL_DestroyMutex(f->mutex);
682     SDL_DestroyCond(f->cond);
683 }
684
685 static void frame_queue_signal(FrameQueue *f)
686 {
687     SDL_LockMutex(f->mutex);
688     SDL_CondSignal(f->cond);
689     SDL_UnlockMutex(f->mutex);
690 }
691
692 static Frame *frame_queue_peek(FrameQueue *f)
693 {
694     return &f->queue[(f->rindex + f->rindex_shown) % f->max_size];
695 }
696
697 static Frame *frame_queue_peek_next(FrameQueue *f)
698 {
699     return &f->queue[(f->rindex + f->rindex_shown + 1) % f->max_size];
700 }
701
702 static Frame *frame_queue_peek_last(FrameQueue *f)
703 {
704     return &f->queue[f->rindex];
705 }
706
707 static Frame *frame_queue_peek_writable(FrameQueue *f)
708 {
709     /* wait until we have space to put a new frame */
710     SDL_LockMutex(f->mutex);
711     while (f->size >= f->max_size &&
712            !f->pktq->abort_request) {
713         SDL_CondWait(f->cond, f->mutex);
714     }
715     SDL_UnlockMutex(f->mutex);
716
717     if (f->pktq->abort_request)
718         return NULL;
719
720     return &f->queue[f->windex];
721 }
722
723 static Frame *frame_queue_peek_readable(FrameQueue *f)
724 {
725     /* wait until we have a readable a new frame */
726     SDL_LockMutex(f->mutex);
727     while (f->size - f->rindex_shown <= 0 &&
728            !f->pktq->abort_request) {
729         SDL_CondWait(f->cond, f->mutex);
730     }
731     SDL_UnlockMutex(f->mutex);
732
733     if (f->pktq->abort_request)
734         return NULL;
735
736     return &f->queue[(f->rindex + f->rindex_shown) % f->max_size];
737 }
738
739 static void frame_queue_push(FrameQueue *f)
740 {
741     if (++f->windex == f->max_size)
742         f->windex = 0;
743     SDL_LockMutex(f->mutex);
744     f->size++;
745     SDL_CondSignal(f->cond);
746     SDL_UnlockMutex(f->mutex);
747 }
748
749 static void frame_queue_next(FrameQueue *f)
750 {
751     if (f->keep_last && !f->rindex_shown) {
752         f->rindex_shown = 1;
753         return;
754     }
755     frame_queue_unref_item(&f->queue[f->rindex]);
756     if (++f->rindex == f->max_size)
757         f->rindex = 0;
758     SDL_LockMutex(f->mutex);
759     f->size--;
760     SDL_CondSignal(f->cond);
761     SDL_UnlockMutex(f->mutex);
762 }
763
764 /* return the number of undisplayed frames in the queue */
765 static int frame_queue_nb_remaining(FrameQueue *f)
766 {
767     return f->size - f->rindex_shown;
768 }
769
770 /* return last shown position */
771 static int64_t frame_queue_last_pos(FrameQueue *f)
772 {
773     Frame *fp = &f->queue[f->rindex];
774     if (f->rindex_shown && fp->serial == f->pktq->serial)
775         return fp->pos;
776     else
777         return -1;
778 }
779
780 static void decoder_abort(Decoder *d, FrameQueue *fq)
781 {
782     packet_queue_abort(d->queue);
783     frame_queue_signal(fq);
784     SDL_WaitThread(d->decoder_tid, NULL);
785     d->decoder_tid = NULL;
786     packet_queue_flush(d->queue);
787 }
788
789 static inline void fill_rectangle(int x, int y, int w, int h)
790 {
791     SDL_Rect rect;
792     rect.x = x;
793     rect.y = y;
794     rect.w = w;
795     rect.h = h;
796     if (w && h)
797         SDL_RenderFillRect(renderer, &rect);
798 }
799
800 static void free_picture(Frame *vp)
801 {
802      if (vp->bmp) {
803          SDL_DestroyTexture(vp->bmp);
804          vp->bmp = NULL;
805      }
806 }
807
808 static int realloc_texture(SDL_Texture **texture, Uint32 new_format, int new_width, int new_height, SDL_BlendMode blendmode, int init_texture)
809 {
810     Uint32 format;
811     int access, w, h;
812     if (SDL_QueryTexture(*texture, &format, &access, &w, &h) < 0 || new_width != w || new_height != h || new_format != format) {
813         void *pixels;
814         int pitch;
815         SDL_DestroyTexture(*texture);
816         if (!(*texture = SDL_CreateTexture(renderer, new_format, SDL_TEXTUREACCESS_STREAMING, new_width, new_height)))
817             return -1;
818         if (SDL_SetTextureBlendMode(*texture, blendmode) < 0)
819             return -1;
820         if (init_texture) {
821             if (SDL_LockTexture(*texture, NULL, &pixels, &pitch) < 0)
822                 return -1;
823             memset(pixels, 0, pitch * new_height);
824             SDL_UnlockTexture(*texture);
825         }
826     }
827     return 0;
828 }
829
830 static void calculate_display_rect(SDL_Rect *rect,
831                                    int scr_xleft, int scr_ytop, int scr_width, int scr_height,
832                                    int pic_width, int pic_height, AVRational pic_sar)
833 {
834     float aspect_ratio;
835     int width, height, x, y;
836
837     if (pic_sar.num == 0)
838         aspect_ratio = 0;
839     else
840         aspect_ratio = av_q2d(pic_sar);
841
842     if (aspect_ratio <= 0.0)
843         aspect_ratio = 1.0;
844     aspect_ratio *= (float)pic_width / (float)pic_height;
845
846     /* XXX: we suppose the screen has a 1.0 pixel ratio */
847     height = scr_height;
848     width = lrint(height * aspect_ratio) & ~1;
849     if (width > scr_width) {
850         width = scr_width;
851         height = lrint(width / aspect_ratio) & ~1;
852     }
853     x = (scr_width - width) / 2;
854     y = (scr_height - height) / 2;
855     rect->x = scr_xleft + x;
856     rect->y = scr_ytop  + y;
857     rect->w = FFMAX(width,  1);
858     rect->h = FFMAX(height, 1);
859 }
860
861 static int upload_texture(SDL_Texture *tex, AVFrame *frame, struct SwsContext **img_convert_ctx) {
862     int ret = 0;
863     switch (frame->format) {
864         case AV_PIX_FMT_YUV420P:
865             if (frame->linesize[0] < 0 || frame->linesize[1] < 0 || frame->linesize[2] < 0) {
866                 av_log(NULL, AV_LOG_ERROR, "Negative linesize is not supported for YUV.\n");
867                 return -1;
868             }
869             ret = SDL_UpdateYUVTexture(tex, NULL, frame->data[0], frame->linesize[0],
870                                                   frame->data[1], frame->linesize[1],
871                                                   frame->data[2], frame->linesize[2]);
872             break;
873         case AV_PIX_FMT_BGRA:
874             if (frame->linesize[0] < 0) {
875                 ret = SDL_UpdateTexture(tex, NULL, frame->data[0] + frame->linesize[0] * (frame->height - 1), -frame->linesize[0]);
876             } else {
877                 ret = SDL_UpdateTexture(tex, NULL, frame->data[0], frame->linesize[0]);
878             }
879             break;
880         default:
881             /* This should only happen if we are not using avfilter... */
882             *img_convert_ctx = sws_getCachedContext(*img_convert_ctx,
883                 frame->width, frame->height, frame->format, frame->width, frame->height,
884                 AV_PIX_FMT_BGRA, sws_flags, NULL, NULL, NULL);
885             if (*img_convert_ctx != NULL) {
886                 uint8_t *pixels;
887                 int pitch;
888                 if (!SDL_LockTexture(tex, NULL, (void **)&pixels, &pitch)) {
889                     sws_scale(*img_convert_ctx, (const uint8_t * const *)frame->data, frame->linesize,
890                               0, frame->height, &pixels, &pitch);
891                     SDL_UnlockTexture(tex);
892                 }
893             } else {
894                 av_log(NULL, AV_LOG_FATAL, "Cannot initialize the conversion context\n");
895                 ret = -1;
896             }
897             break;
898     }
899     return ret;
900 }
901
902 static void video_image_display(VideoState *is)
903 {
904     Frame *vp;
905     Frame *sp = NULL;
906     SDL_Rect rect;
907
908     vp = frame_queue_peek_last(&is->pictq);
909     if (vp->bmp) {
910         if (is->subtitle_st) {
911             if (frame_queue_nb_remaining(&is->subpq) > 0) {
912                 sp = frame_queue_peek(&is->subpq);
913
914                 if (vp->pts >= sp->pts + ((float) sp->sub.start_display_time / 1000)) {
915                     if (!sp->uploaded) {
916                         uint8_t *pixels;
917                         int pitch;
918                         int i;
919                         if (!sp->width || !sp->height) {
920                             sp->width = vp->width;
921                             sp->height = vp->height;
922                         }
923                         if (realloc_texture(&is->sub_texture, SDL_PIXELFORMAT_ARGB8888, sp->width, sp->height, SDL_BLENDMODE_BLEND, 1) < 0)
924                             return;
925
926                         for (i = 0; i < sp->sub.num_rects; i++) {
927                             AVSubtitleRect *sub_rect = sp->sub.rects[i];
928
929                             sub_rect->x = av_clip(sub_rect->x, 0, sp->width );
930                             sub_rect->y = av_clip(sub_rect->y, 0, sp->height);
931                             sub_rect->w = av_clip(sub_rect->w, 0, sp->width  - sub_rect->x);
932                             sub_rect->h = av_clip(sub_rect->h, 0, sp->height - sub_rect->y);
933
934                             is->sub_convert_ctx = sws_getCachedContext(is->sub_convert_ctx,
935                                 sub_rect->w, sub_rect->h, AV_PIX_FMT_PAL8,
936                                 sub_rect->w, sub_rect->h, AV_PIX_FMT_BGRA,
937                                 0, NULL, NULL, NULL);
938                             if (!is->sub_convert_ctx) {
939                                 av_log(NULL, AV_LOG_FATAL, "Cannot initialize the conversion context\n");
940                                 return;
941                             }
942                             if (!SDL_LockTexture(is->sub_texture, (SDL_Rect *)sub_rect, (void **)&pixels, &pitch)) {
943                                 sws_scale(is->sub_convert_ctx, (const uint8_t * const *)sub_rect->data, sub_rect->linesize,
944                                           0, sub_rect->h, &pixels, &pitch);
945                                 SDL_UnlockTexture(is->sub_texture);
946                             }
947                         }
948                         sp->uploaded = 1;
949                     }
950                 } else
951                     sp = NULL;
952             }
953         }
954
955         calculate_display_rect(&rect, is->xleft, is->ytop, is->width, is->height, vp->width, vp->height, vp->sar);
956
957         if (!vp->uploaded) {
958             if (upload_texture(vp->bmp, vp->frame, &is->img_convert_ctx) < 0)
959                 return;
960             vp->uploaded = 1;
961             vp->flip_v = vp->frame->linesize[0] < 0;
962         }
963
964         SDL_RenderCopyEx(renderer, vp->bmp, NULL, &rect, 0, NULL, vp->flip_v ? SDL_FLIP_VERTICAL : 0);
965         if (sp) {
966 #if USE_ONEPASS_SUBTITLE_RENDER
967             SDL_RenderCopy(renderer, is->sub_texture, NULL, &rect);
968 #else
969             int i;
970             double xratio = (double)rect.w / (double)sp->width;
971             double yratio = (double)rect.h / (double)sp->height;
972             for (i = 0; i < sp->sub.num_rects; i++) {
973                 SDL_Rect *sub_rect = (SDL_Rect*)sp->sub.rects[i];
974                 SDL_Rect target = {.x = rect.x + sub_rect->x * xratio,
975                                    .y = rect.y + sub_rect->y * yratio,
976                                    .w = sub_rect->w * xratio,
977                                    .h = sub_rect->h * yratio};
978                 SDL_RenderCopy(renderer, is->sub_texture, sub_rect, &target);
979             }
980 #endif
981         }
982     }
983 }
984
985 static inline int compute_mod(int a, int b)
986 {
987     return a < 0 ? a%b + b : a%b;
988 }
989
990 static void video_audio_display(VideoState *s)
991 {
992     int i, i_start, x, y1, y, ys, delay, n, nb_display_channels;
993     int ch, channels, h, h2;
994     int64_t time_diff;
995     int rdft_bits, nb_freq;
996
997     for (rdft_bits = 1; (1 << rdft_bits) < 2 * s->height; rdft_bits++)
998         ;
999     nb_freq = 1 << (rdft_bits - 1);
1000
1001     /* compute display index : center on currently output samples */
1002     channels = s->audio_tgt.channels;
1003     nb_display_channels = channels;
1004     if (!s->paused) {
1005         int data_used= s->show_mode == SHOW_MODE_WAVES ? s->width : (2*nb_freq);
1006         n = 2 * channels;
1007         delay = s->audio_write_buf_size;
1008         delay /= n;
1009
1010         /* to be more precise, we take into account the time spent since
1011            the last buffer computation */
1012         if (audio_callback_time) {
1013             time_diff = av_gettime_relative() - audio_callback_time;
1014             delay -= (time_diff * s->audio_tgt.freq) / 1000000;
1015         }
1016
1017         delay += 2 * data_used;
1018         if (delay < data_used)
1019             delay = data_used;
1020
1021         i_start= x = compute_mod(s->sample_array_index - delay * channels, SAMPLE_ARRAY_SIZE);
1022         if (s->show_mode == SHOW_MODE_WAVES) {
1023             h = INT_MIN;
1024             for (i = 0; i < 1000; i += channels) {
1025                 int idx = (SAMPLE_ARRAY_SIZE + x - i) % SAMPLE_ARRAY_SIZE;
1026                 int a = s->sample_array[idx];
1027                 int b = s->sample_array[(idx + 4 * channels) % SAMPLE_ARRAY_SIZE];
1028                 int c = s->sample_array[(idx + 5 * channels) % SAMPLE_ARRAY_SIZE];
1029                 int d = s->sample_array[(idx + 9 * channels) % SAMPLE_ARRAY_SIZE];
1030                 int score = a - d;
1031                 if (h < score && (b ^ c) < 0) {
1032                     h = score;
1033                     i_start = idx;
1034                 }
1035             }
1036         }
1037
1038         s->last_i_start = i_start;
1039     } else {
1040         i_start = s->last_i_start;
1041     }
1042
1043     if (s->show_mode == SHOW_MODE_WAVES) {
1044         SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
1045
1046         /* total height for one channel */
1047         h = s->height / nb_display_channels;
1048         /* graph height / 2 */
1049         h2 = (h * 9) / 20;
1050         for (ch = 0; ch < nb_display_channels; ch++) {
1051             i = i_start + ch;
1052             y1 = s->ytop + ch * h + (h / 2); /* position of center line */
1053             for (x = 0; x < s->width; x++) {
1054                 y = (s->sample_array[i] * h2) >> 15;
1055                 if (y < 0) {
1056                     y = -y;
1057                     ys = y1 - y;
1058                 } else {
1059                     ys = y1;
1060                 }
1061                 fill_rectangle(s->xleft + x, ys, 1, y);
1062                 i += channels;
1063                 if (i >= SAMPLE_ARRAY_SIZE)
1064                     i -= SAMPLE_ARRAY_SIZE;
1065             }
1066         }
1067
1068         SDL_SetRenderDrawColor(renderer, 0, 0, 255, 255);
1069
1070         for (ch = 1; ch < nb_display_channels; ch++) {
1071             y = s->ytop + ch * h;
1072             fill_rectangle(s->xleft, y, s->width, 1);
1073         }
1074     } else {
1075         if (realloc_texture(&s->vis_texture, SDL_PIXELFORMAT_ARGB8888, s->width, s->height, SDL_BLENDMODE_NONE, 1) < 0)
1076             return;
1077
1078         nb_display_channels= FFMIN(nb_display_channels, 2);
1079         if (rdft_bits != s->rdft_bits) {
1080             av_rdft_end(s->rdft);
1081             av_free(s->rdft_data);
1082             s->rdft = av_rdft_init(rdft_bits, DFT_R2C);
1083             s->rdft_bits = rdft_bits;
1084             s->rdft_data = av_malloc_array(nb_freq, 4 *sizeof(*s->rdft_data));
1085         }
1086         if (!s->rdft || !s->rdft_data){
1087             av_log(NULL, AV_LOG_ERROR, "Failed to allocate buffers for RDFT, switching to waves display\n");
1088             s->show_mode = SHOW_MODE_WAVES;
1089         } else {
1090             FFTSample *data[2];
1091             SDL_Rect rect = {.x = s->xpos, .y = 0, .w = 1, .h = s->height};
1092             uint32_t *pixels;
1093             int pitch;
1094             for (ch = 0; ch < nb_display_channels; ch++) {
1095                 data[ch] = s->rdft_data + 2 * nb_freq * ch;
1096                 i = i_start + ch;
1097                 for (x = 0; x < 2 * nb_freq; x++) {
1098                     double w = (x-nb_freq) * (1.0 / nb_freq);
1099                     data[ch][x] = s->sample_array[i] * (1.0 - w * w);
1100                     i += channels;
1101                     if (i >= SAMPLE_ARRAY_SIZE)
1102                         i -= SAMPLE_ARRAY_SIZE;
1103                 }
1104                 av_rdft_calc(s->rdft, data[ch]);
1105             }
1106             /* Least efficient way to do this, we should of course
1107              * directly access it but it is more than fast enough. */
1108             if (!SDL_LockTexture(s->vis_texture, &rect, (void **)&pixels, &pitch)) {
1109                 pitch >>= 2;
1110                 pixels += pitch * s->height;
1111                 for (y = 0; y < s->height; y++) {
1112                     double w = 1 / sqrt(nb_freq);
1113                     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]));
1114                     int b = (nb_display_channels == 2 ) ? sqrt(w * hypot(data[1][2 * y + 0], data[1][2 * y + 1]))
1115                                                         : a;
1116                     a = FFMIN(a, 255);
1117                     b = FFMIN(b, 255);
1118                     pixels -= pitch;
1119                     *pixels = (a << 16) + (b << 8) + ((a+b) >> 1);
1120                 }
1121                 SDL_UnlockTexture(s->vis_texture);
1122             }
1123             SDL_RenderCopy(renderer, s->vis_texture, NULL, NULL);
1124         }
1125         if (!s->paused)
1126             s->xpos++;
1127         if (s->xpos >= s->width)
1128             s->xpos= s->xleft;
1129     }
1130 }
1131
1132 static void stream_component_close(VideoState *is, int stream_index)
1133 {
1134     AVFormatContext *ic = is->ic;
1135     AVCodecParameters *codecpar;
1136
1137     if (stream_index < 0 || stream_index >= ic->nb_streams)
1138         return;
1139     codecpar = ic->streams[stream_index]->codecpar;
1140
1141     switch (codecpar->codec_type) {
1142     case AVMEDIA_TYPE_AUDIO:
1143         decoder_abort(&is->auddec, &is->sampq);
1144         SDL_CloseAudio();
1145         decoder_destroy(&is->auddec);
1146         swr_free(&is->swr_ctx);
1147         av_freep(&is->audio_buf1);
1148         is->audio_buf1_size = 0;
1149         is->audio_buf = NULL;
1150
1151         if (is->rdft) {
1152             av_rdft_end(is->rdft);
1153             av_freep(&is->rdft_data);
1154             is->rdft = NULL;
1155             is->rdft_bits = 0;
1156         }
1157         break;
1158     case AVMEDIA_TYPE_VIDEO:
1159         decoder_abort(&is->viddec, &is->pictq);
1160         decoder_destroy(&is->viddec);
1161         break;
1162     case AVMEDIA_TYPE_SUBTITLE:
1163         decoder_abort(&is->subdec, &is->subpq);
1164         decoder_destroy(&is->subdec);
1165         break;
1166     default:
1167         break;
1168     }
1169
1170     ic->streams[stream_index]->discard = AVDISCARD_ALL;
1171     switch (codecpar->codec_type) {
1172     case AVMEDIA_TYPE_AUDIO:
1173         is->audio_st = NULL;
1174         is->audio_stream = -1;
1175         break;
1176     case AVMEDIA_TYPE_VIDEO:
1177         is->video_st = NULL;
1178         is->video_stream = -1;
1179         break;
1180     case AVMEDIA_TYPE_SUBTITLE:
1181         is->subtitle_st = NULL;
1182         is->subtitle_stream = -1;
1183         break;
1184     default:
1185         break;
1186     }
1187 }
1188
1189 static void stream_close(VideoState *is)
1190 {
1191     /* XXX: use a special url_shutdown call to abort parse cleanly */
1192     is->abort_request = 1;
1193     SDL_WaitThread(is->read_tid, NULL);
1194
1195     /* close each stream */
1196     if (is->audio_stream >= 0)
1197         stream_component_close(is, is->audio_stream);
1198     if (is->video_stream >= 0)
1199         stream_component_close(is, is->video_stream);
1200     if (is->subtitle_stream >= 0)
1201         stream_component_close(is, is->subtitle_stream);
1202
1203     avformat_close_input(&is->ic);
1204
1205     packet_queue_destroy(&is->videoq);
1206     packet_queue_destroy(&is->audioq);
1207     packet_queue_destroy(&is->subtitleq);
1208
1209     /* free all pictures */
1210     frame_queue_destory(&is->pictq);
1211     frame_queue_destory(&is->sampq);
1212     frame_queue_destory(&is->subpq);
1213     SDL_DestroyCond(is->continue_read_thread);
1214     sws_freeContext(is->img_convert_ctx);
1215     sws_freeContext(is->sub_convert_ctx);
1216     av_free(is->filename);
1217     if (is->vis_texture)
1218         SDL_DestroyTexture(is->vis_texture);
1219     if (is->sub_texture)
1220         SDL_DestroyTexture(is->sub_texture);
1221     av_free(is);
1222 }
1223
1224 static void do_exit(VideoState *is)
1225 {
1226     if (is) {
1227         stream_close(is);
1228     }
1229     if (renderer)
1230         SDL_DestroyRenderer(renderer);
1231     if (window)
1232         SDL_DestroyWindow(window);
1233     av_lockmgr_register(NULL);
1234     uninit_opts();
1235 #if CONFIG_AVFILTER
1236     av_freep(&vfilters_list);
1237 #endif
1238     avformat_network_deinit();
1239     if (show_status)
1240         printf("\n");
1241     SDL_Quit();
1242     av_log(NULL, AV_LOG_QUIET, "%s", "");
1243     exit(0);
1244 }
1245
1246 static void sigterm_handler(int sig)
1247 {
1248     exit(123);
1249 }
1250
1251 static void set_default_window_size(int width, int height, AVRational sar)
1252 {
1253     SDL_Rect rect;
1254     calculate_display_rect(&rect, 0, 0, INT_MAX, height, width, height, sar);
1255     default_width  = rect.w;
1256     default_height = rect.h;
1257 }
1258
1259 static int video_open(VideoState *is, Frame *vp)
1260 {
1261     int w,h;
1262
1263     if (vp && vp->width)
1264         set_default_window_size(vp->width, vp->height, vp->sar);
1265
1266     if (screen_width) {
1267         w = screen_width;
1268         h = screen_height;
1269     } else {
1270         w = default_width;
1271         h = default_height;
1272     }
1273
1274     if (!window) {
1275         int flags = SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE;
1276         if (!window_title)
1277             window_title = input_filename;
1278         if (is_full_screen)
1279             flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
1280         window = SDL_CreateWindow(window_title, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, w, h, flags);
1281         SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "linear");
1282         if (window) {
1283             SDL_RendererInfo info;
1284             renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
1285             if (!renderer) {
1286                 av_log(NULL, AV_LOG_WARNING, "Failed to initialize a hardware accelerated renderer: %s\n", SDL_GetError());
1287                 renderer = SDL_CreateRenderer(window, -1, 0);
1288             }
1289             if (renderer) {
1290                 if (!SDL_GetRendererInfo(renderer, &info))
1291                     av_log(NULL, AV_LOG_VERBOSE, "Initialized %s renderer.\n", info.name);
1292             }
1293         }
1294     } else {
1295         SDL_SetWindowSize(window, w, h);
1296     }
1297
1298     if (!window || !renderer) {
1299         av_log(NULL, AV_LOG_FATAL, "SDL: could not set video mode - exiting\n");
1300         do_exit(is);
1301     }
1302
1303     is->width  = w;
1304     is->height = h;
1305
1306     return 0;
1307 }
1308
1309 /* display the current picture, if any */
1310 static void video_display(VideoState *is)
1311 {
1312     if (!window)
1313         video_open(is, NULL);
1314
1315     SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
1316     SDL_RenderClear(renderer);
1317     if (is->audio_st && is->show_mode != SHOW_MODE_VIDEO)
1318         video_audio_display(is);
1319     else if (is->video_st)
1320         video_image_display(is);
1321     SDL_RenderPresent(renderer);
1322 }
1323
1324 static double get_clock(Clock *c)
1325 {
1326     if (*c->queue_serial != c->serial)
1327         return NAN;
1328     if (c->paused) {
1329         return c->pts;
1330     } else {
1331         double time = av_gettime_relative() / 1000000.0;
1332         return c->pts_drift + time - (time - c->last_updated) * (1.0 - c->speed);
1333     }
1334 }
1335
1336 static void set_clock_at(Clock *c, double pts, int serial, double time)
1337 {
1338     c->pts = pts;
1339     c->last_updated = time;
1340     c->pts_drift = c->pts - time;
1341     c->serial = serial;
1342 }
1343
1344 static void set_clock(Clock *c, double pts, int serial)
1345 {
1346     double time = av_gettime_relative() / 1000000.0;
1347     set_clock_at(c, pts, serial, time);
1348 }
1349
1350 static void set_clock_speed(Clock *c, double speed)
1351 {
1352     set_clock(c, get_clock(c), c->serial);
1353     c->speed = speed;
1354 }
1355
1356 static void init_clock(Clock *c, int *queue_serial)
1357 {
1358     c->speed = 1.0;
1359     c->paused = 0;
1360     c->queue_serial = queue_serial;
1361     set_clock(c, NAN, -1);
1362 }
1363
1364 static void sync_clock_to_slave(Clock *c, Clock *slave)
1365 {
1366     double clock = get_clock(c);
1367     double slave_clock = get_clock(slave);
1368     if (!isnan(slave_clock) && (isnan(clock) || fabs(clock - slave_clock) > AV_NOSYNC_THRESHOLD))
1369         set_clock(c, slave_clock, slave->serial);
1370 }
1371
1372 static int get_master_sync_type(VideoState *is) {
1373     if (is->av_sync_type == AV_SYNC_VIDEO_MASTER) {
1374         if (is->video_st)
1375             return AV_SYNC_VIDEO_MASTER;
1376         else
1377             return AV_SYNC_AUDIO_MASTER;
1378     } else if (is->av_sync_type == AV_SYNC_AUDIO_MASTER) {
1379         if (is->audio_st)
1380             return AV_SYNC_AUDIO_MASTER;
1381         else
1382             return AV_SYNC_EXTERNAL_CLOCK;
1383     } else {
1384         return AV_SYNC_EXTERNAL_CLOCK;
1385     }
1386 }
1387
1388 /* get the current master clock value */
1389 static double get_master_clock(VideoState *is)
1390 {
1391     double val;
1392
1393     switch (get_master_sync_type(is)) {
1394         case AV_SYNC_VIDEO_MASTER:
1395             val = get_clock(&is->vidclk);
1396             break;
1397         case AV_SYNC_AUDIO_MASTER:
1398             val = get_clock(&is->audclk);
1399             break;
1400         default:
1401             val = get_clock(&is->extclk);
1402             break;
1403     }
1404     return val;
1405 }
1406
1407 static void check_external_clock_speed(VideoState *is) {
1408    if (is->video_stream >= 0 && is->videoq.nb_packets <= EXTERNAL_CLOCK_MIN_FRAMES ||
1409        is->audio_stream >= 0 && is->audioq.nb_packets <= EXTERNAL_CLOCK_MIN_FRAMES) {
1410        set_clock_speed(&is->extclk, FFMAX(EXTERNAL_CLOCK_SPEED_MIN, is->extclk.speed - EXTERNAL_CLOCK_SPEED_STEP));
1411    } else if ((is->video_stream < 0 || is->videoq.nb_packets > EXTERNAL_CLOCK_MAX_FRAMES) &&
1412               (is->audio_stream < 0 || is->audioq.nb_packets > EXTERNAL_CLOCK_MAX_FRAMES)) {
1413        set_clock_speed(&is->extclk, FFMIN(EXTERNAL_CLOCK_SPEED_MAX, is->extclk.speed + EXTERNAL_CLOCK_SPEED_STEP));
1414    } else {
1415        double speed = is->extclk.speed;
1416        if (speed != 1.0)
1417            set_clock_speed(&is->extclk, speed + EXTERNAL_CLOCK_SPEED_STEP * (1.0 - speed) / fabs(1.0 - speed));
1418    }
1419 }
1420
1421 /* seek in the stream */
1422 static void stream_seek(VideoState *is, int64_t pos, int64_t rel, int seek_by_bytes)
1423 {
1424     if (!is->seek_req) {
1425         is->seek_pos = pos;
1426         is->seek_rel = rel;
1427         is->seek_flags &= ~AVSEEK_FLAG_BYTE;
1428         if (seek_by_bytes)
1429             is->seek_flags |= AVSEEK_FLAG_BYTE;
1430         is->seek_req = 1;
1431         SDL_CondSignal(is->continue_read_thread);
1432     }
1433 }
1434
1435 /* pause or resume the video */
1436 static void stream_toggle_pause(VideoState *is)
1437 {
1438     if (is->paused) {
1439         is->frame_timer += av_gettime_relative() / 1000000.0 - is->vidclk.last_updated;
1440         if (is->read_pause_return != AVERROR(ENOSYS)) {
1441             is->vidclk.paused = 0;
1442         }
1443         set_clock(&is->vidclk, get_clock(&is->vidclk), is->vidclk.serial);
1444     }
1445     set_clock(&is->extclk, get_clock(&is->extclk), is->extclk.serial);
1446     is->paused = is->audclk.paused = is->vidclk.paused = is->extclk.paused = !is->paused;
1447 }
1448
1449 static void toggle_pause(VideoState *is)
1450 {
1451     stream_toggle_pause(is);
1452     is->step = 0;
1453 }
1454
1455 static void toggle_mute(VideoState *is)
1456 {
1457     is->muted = !is->muted;
1458 }
1459
1460 static void update_volume(VideoState *is, int sign, int step)
1461 {
1462     is->audio_volume = av_clip(is->audio_volume + sign * step, 0, SDL_MIX_MAXVOLUME);
1463 }
1464
1465 static void step_to_next_frame(VideoState *is)
1466 {
1467     /* if the stream is paused unpause it, then step */
1468     if (is->paused)
1469         stream_toggle_pause(is);
1470     is->step = 1;
1471 }
1472
1473 static double compute_target_delay(double delay, VideoState *is)
1474 {
1475     double sync_threshold, diff = 0;
1476
1477     /* update delay to follow master synchronisation source */
1478     if (get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER) {
1479         /* if video is slave, we try to correct big delays by
1480            duplicating or deleting a frame */
1481         diff = get_clock(&is->vidclk) - get_master_clock(is);
1482
1483         /* skip or repeat frame. We take into account the
1484            delay to compute the threshold. I still don't know
1485            if it is the best guess */
1486         sync_threshold = FFMAX(AV_SYNC_THRESHOLD_MIN, FFMIN(AV_SYNC_THRESHOLD_MAX, delay));
1487         if (!isnan(diff) && fabs(diff) < is->max_frame_duration) {
1488             if (diff <= -sync_threshold)
1489                 delay = FFMAX(0, delay + diff);
1490             else if (diff >= sync_threshold && delay > AV_SYNC_FRAMEDUP_THRESHOLD)
1491                 delay = delay + diff;
1492             else if (diff >= sync_threshold)
1493                 delay = 2 * delay;
1494         }
1495     }
1496
1497     av_log(NULL, AV_LOG_TRACE, "video: delay=%0.3f A-V=%f\n",
1498             delay, -diff);
1499
1500     return delay;
1501 }
1502
1503 static double vp_duration(VideoState *is, Frame *vp, Frame *nextvp) {
1504     if (vp->serial == nextvp->serial) {
1505         double duration = nextvp->pts - vp->pts;
1506         if (isnan(duration) || duration <= 0 || duration > is->max_frame_duration)
1507             return vp->duration;
1508         else
1509             return duration;
1510     } else {
1511         return 0.0;
1512     }
1513 }
1514
1515 static void update_video_pts(VideoState *is, double pts, int64_t pos, int serial) {
1516     /* update current video pts */
1517     set_clock(&is->vidclk, pts, serial);
1518     sync_clock_to_slave(&is->extclk, &is->vidclk);
1519 }
1520
1521 /* called to display each frame */
1522 static void video_refresh(void *opaque, double *remaining_time)
1523 {
1524     VideoState *is = opaque;
1525     double time;
1526
1527     Frame *sp, *sp2;
1528
1529     if (!is->paused && get_master_sync_type(is) == AV_SYNC_EXTERNAL_CLOCK && is->realtime)
1530         check_external_clock_speed(is);
1531
1532     if (!display_disable && is->show_mode != SHOW_MODE_VIDEO && is->audio_st) {
1533         time = av_gettime_relative() / 1000000.0;
1534         if (is->force_refresh || is->last_vis_time + rdftspeed < time) {
1535             video_display(is);
1536             is->last_vis_time = time;
1537         }
1538         *remaining_time = FFMIN(*remaining_time, is->last_vis_time + rdftspeed - time);
1539     }
1540
1541     if (is->video_st) {
1542 retry:
1543         if (frame_queue_nb_remaining(&is->pictq) == 0) {
1544             // nothing to do, no picture to display in the queue
1545         } else {
1546             double last_duration, duration, delay;
1547             Frame *vp, *lastvp;
1548
1549             /* dequeue the picture */
1550             lastvp = frame_queue_peek_last(&is->pictq);
1551             vp = frame_queue_peek(&is->pictq);
1552
1553             if (vp->serial != is->videoq.serial) {
1554                 frame_queue_next(&is->pictq);
1555                 goto retry;
1556             }
1557
1558             if (lastvp->serial != vp->serial)
1559                 is->frame_timer = av_gettime_relative() / 1000000.0;
1560
1561             if (is->paused)
1562                 goto display;
1563
1564             /* compute nominal last_duration */
1565             last_duration = vp_duration(is, lastvp, vp);
1566             delay = compute_target_delay(last_duration, is);
1567
1568             time= av_gettime_relative()/1000000.0;
1569             if (time < is->frame_timer + delay) {
1570                 *remaining_time = FFMIN(is->frame_timer + delay - time, *remaining_time);
1571                 goto display;
1572             }
1573
1574             is->frame_timer += delay;
1575             if (delay > 0 && time - is->frame_timer > AV_SYNC_THRESHOLD_MAX)
1576                 is->frame_timer = time;
1577
1578             SDL_LockMutex(is->pictq.mutex);
1579             if (!isnan(vp->pts))
1580                 update_video_pts(is, vp->pts, vp->pos, vp->serial);
1581             SDL_UnlockMutex(is->pictq.mutex);
1582
1583             if (frame_queue_nb_remaining(&is->pictq) > 1) {
1584                 Frame *nextvp = frame_queue_peek_next(&is->pictq);
1585                 duration = vp_duration(is, vp, nextvp);
1586                 if(!is->step && (framedrop>0 || (framedrop && get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER)) && time > is->frame_timer + duration){
1587                     is->frame_drops_late++;
1588                     frame_queue_next(&is->pictq);
1589                     goto retry;
1590                 }
1591             }
1592
1593             if (is->subtitle_st) {
1594                     while (frame_queue_nb_remaining(&is->subpq) > 0) {
1595                         sp = frame_queue_peek(&is->subpq);
1596
1597                         if (frame_queue_nb_remaining(&is->subpq) > 1)
1598                             sp2 = frame_queue_peek_next(&is->subpq);
1599                         else
1600                             sp2 = NULL;
1601
1602                         if (sp->serial != is->subtitleq.serial
1603                                 || (is->vidclk.pts > (sp->pts + ((float) sp->sub.end_display_time / 1000)))
1604                                 || (sp2 && is->vidclk.pts > (sp2->pts + ((float) sp2->sub.start_display_time / 1000))))
1605                         {
1606                             if (sp->uploaded) {
1607                                 int i;
1608                                 for (i = 0; i < sp->sub.num_rects; i++) {
1609                                     AVSubtitleRect *sub_rect = sp->sub.rects[i];
1610                                     uint8_t *pixels;
1611                                     int pitch, j;
1612
1613                                     if (!SDL_LockTexture(is->sub_texture, (SDL_Rect *)sub_rect, (void **)&pixels, &pitch)) {
1614                                         for (j = 0; j < sub_rect->h; j++, pixels += pitch)
1615                                             memset(pixels, 0, sub_rect->w << 2);
1616                                         SDL_UnlockTexture(is->sub_texture);
1617                                     }
1618                                 }
1619                             }
1620                             frame_queue_next(&is->subpq);
1621                         } else {
1622                             break;
1623                         }
1624                     }
1625             }
1626
1627             frame_queue_next(&is->pictq);
1628             is->force_refresh = 1;
1629
1630             if (is->step && !is->paused)
1631                 stream_toggle_pause(is);
1632         }
1633 display:
1634         /* display picture */
1635         if (!display_disable && is->force_refresh && is->show_mode == SHOW_MODE_VIDEO && is->pictq.rindex_shown)
1636             video_display(is);
1637     }
1638     is->force_refresh = 0;
1639     if (show_status) {
1640         static int64_t last_time;
1641         int64_t cur_time;
1642         int aqsize, vqsize, sqsize;
1643         double av_diff;
1644
1645         cur_time = av_gettime_relative();
1646         if (!last_time || (cur_time - last_time) >= 30000) {
1647             aqsize = 0;
1648             vqsize = 0;
1649             sqsize = 0;
1650             if (is->audio_st)
1651                 aqsize = is->audioq.size;
1652             if (is->video_st)
1653                 vqsize = is->videoq.size;
1654             if (is->subtitle_st)
1655                 sqsize = is->subtitleq.size;
1656             av_diff = 0;
1657             if (is->audio_st && is->video_st)
1658                 av_diff = get_clock(&is->audclk) - get_clock(&is->vidclk);
1659             else if (is->video_st)
1660                 av_diff = get_master_clock(is) - get_clock(&is->vidclk);
1661             else if (is->audio_st)
1662                 av_diff = get_master_clock(is) - get_clock(&is->audclk);
1663             av_log(NULL, AV_LOG_INFO,
1664                    "%7.2f %s:%7.3f fd=%4d aq=%5dKB vq=%5dKB sq=%5dB f=%"PRId64"/%"PRId64"   \r",
1665                    get_master_clock(is),
1666                    (is->audio_st && is->video_st) ? "A-V" : (is->video_st ? "M-V" : (is->audio_st ? "M-A" : "   ")),
1667                    av_diff,
1668                    is->frame_drops_early + is->frame_drops_late,
1669                    aqsize / 1024,
1670                    vqsize / 1024,
1671                    sqsize,
1672                    is->video_st ? is->viddec.avctx->pts_correction_num_faulty_dts : 0,
1673                    is->video_st ? is->viddec.avctx->pts_correction_num_faulty_pts : 0);
1674             fflush(stdout);
1675             last_time = cur_time;
1676         }
1677     }
1678 }
1679
1680 /* allocate a picture (needs to do that in main thread to avoid
1681    potential locking problems */
1682 static void alloc_picture(VideoState *is)
1683 {
1684     Frame *vp;
1685     int sdl_format;
1686
1687     vp = &is->pictq.queue[is->pictq.windex];
1688
1689     video_open(is, vp);
1690
1691     if (vp->format == AV_PIX_FMT_YUV420P)
1692         sdl_format = SDL_PIXELFORMAT_YV12;
1693     else
1694         sdl_format = SDL_PIXELFORMAT_ARGB8888;
1695
1696     if (realloc_texture(&vp->bmp, sdl_format, vp->width, vp->height, SDL_BLENDMODE_NONE, 0) < 0) {
1697         /* SDL allocates a buffer smaller than requested if the video
1698          * overlay hardware is unable to support the requested size. */
1699         av_log(NULL, AV_LOG_FATAL,
1700                "Error: the video system does not support an image\n"
1701                         "size of %dx%d pixels. Try using -lowres or -vf \"scale=w:h\"\n"
1702                         "to reduce the image size.\n", vp->width, vp->height );
1703         do_exit(is);
1704     }
1705
1706     SDL_LockMutex(is->pictq.mutex);
1707     vp->allocated = 1;
1708     SDL_CondSignal(is->pictq.cond);
1709     SDL_UnlockMutex(is->pictq.mutex);
1710 }
1711
1712 static int queue_picture(VideoState *is, AVFrame *src_frame, double pts, double duration, int64_t pos, int serial)
1713 {
1714     Frame *vp;
1715
1716 #if defined(DEBUG_SYNC)
1717     printf("frame_type=%c pts=%0.3f\n",
1718            av_get_picture_type_char(src_frame->pict_type), pts);
1719 #endif
1720
1721     if (!(vp = frame_queue_peek_writable(&is->pictq)))
1722         return -1;
1723
1724     vp->sar = src_frame->sample_aspect_ratio;
1725     vp->uploaded = 0;
1726
1727     /* alloc or resize hardware picture buffer */
1728     if (!vp->bmp || !vp->allocated ||
1729         vp->width  != src_frame->width ||
1730         vp->height != src_frame->height ||
1731         vp->format != src_frame->format) {
1732         SDL_Event event;
1733
1734         vp->allocated = 0;
1735         vp->width = src_frame->width;
1736         vp->height = src_frame->height;
1737         vp->format = src_frame->format;
1738
1739         /* the allocation must be done in the main thread to avoid
1740            locking problems. */
1741         event.type = FF_ALLOC_EVENT;
1742         event.user.data1 = is;
1743         SDL_PushEvent(&event);
1744
1745         /* wait until the picture is allocated */
1746         SDL_LockMutex(is->pictq.mutex);
1747         while (!vp->allocated && !is->videoq.abort_request) {
1748             SDL_CondWait(is->pictq.cond, is->pictq.mutex);
1749         }
1750         /* if the queue is aborted, we have to pop the pending ALLOC event or wait for the allocation to complete */
1751         if (is->videoq.abort_request && SDL_PeepEvents(&event, 1, SDL_GETEVENT, FF_ALLOC_EVENT, FF_ALLOC_EVENT) != 1) {
1752             while (!vp->allocated && !is->abort_request) {
1753                 SDL_CondWait(is->pictq.cond, is->pictq.mutex);
1754             }
1755         }
1756         SDL_UnlockMutex(is->pictq.mutex);
1757
1758         if (is->videoq.abort_request)
1759             return -1;
1760     }
1761
1762     /* if the frame is not skipped, then display it */
1763     if (vp->bmp) {
1764         vp->pts = pts;
1765         vp->duration = duration;
1766         vp->pos = pos;
1767         vp->serial = serial;
1768
1769         av_frame_move_ref(vp->frame, src_frame);
1770         frame_queue_push(&is->pictq);
1771     }
1772     return 0;
1773 }
1774
1775 static int get_video_frame(VideoState *is, AVFrame *frame)
1776 {
1777     int got_picture;
1778
1779     if ((got_picture = decoder_decode_frame(&is->viddec, frame, NULL)) < 0)
1780         return -1;
1781
1782     if (got_picture) {
1783         double dpts = NAN;
1784
1785         if (frame->pts != AV_NOPTS_VALUE)
1786             dpts = av_q2d(is->video_st->time_base) * frame->pts;
1787
1788         frame->sample_aspect_ratio = av_guess_sample_aspect_ratio(is->ic, is->video_st, frame);
1789
1790         if (framedrop>0 || (framedrop && get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER)) {
1791             if (frame->pts != AV_NOPTS_VALUE) {
1792                 double diff = dpts - get_master_clock(is);
1793                 if (!isnan(diff) && fabs(diff) < AV_NOSYNC_THRESHOLD &&
1794                     diff - is->frame_last_filter_delay < 0 &&
1795                     is->viddec.pkt_serial == is->vidclk.serial &&
1796                     is->videoq.nb_packets) {
1797                     is->frame_drops_early++;
1798                     av_frame_unref(frame);
1799                     got_picture = 0;
1800                 }
1801             }
1802         }
1803     }
1804
1805     return got_picture;
1806 }
1807
1808 #if CONFIG_AVFILTER
1809 static int configure_filtergraph(AVFilterGraph *graph, const char *filtergraph,
1810                                  AVFilterContext *source_ctx, AVFilterContext *sink_ctx)
1811 {
1812     int ret, i;
1813     int nb_filters = graph->nb_filters;
1814     AVFilterInOut *outputs = NULL, *inputs = NULL;
1815
1816     if (filtergraph) {
1817         outputs = avfilter_inout_alloc();
1818         inputs  = avfilter_inout_alloc();
1819         if (!outputs || !inputs) {
1820             ret = AVERROR(ENOMEM);
1821             goto fail;
1822         }
1823
1824         outputs->name       = av_strdup("in");
1825         outputs->filter_ctx = source_ctx;
1826         outputs->pad_idx    = 0;
1827         outputs->next       = NULL;
1828
1829         inputs->name        = av_strdup("out");
1830         inputs->filter_ctx  = sink_ctx;
1831         inputs->pad_idx     = 0;
1832         inputs->next        = NULL;
1833
1834         if ((ret = avfilter_graph_parse_ptr(graph, filtergraph, &inputs, &outputs, NULL)) < 0)
1835             goto fail;
1836     } else {
1837         if ((ret = avfilter_link(source_ctx, 0, sink_ctx, 0)) < 0)
1838             goto fail;
1839     }
1840
1841     /* Reorder the filters to ensure that inputs of the custom filters are merged first */
1842     for (i = 0; i < graph->nb_filters - nb_filters; i++)
1843         FFSWAP(AVFilterContext*, graph->filters[i], graph->filters[i + nb_filters]);
1844
1845     ret = avfilter_graph_config(graph, NULL);
1846 fail:
1847     avfilter_inout_free(&outputs);
1848     avfilter_inout_free(&inputs);
1849     return ret;
1850 }
1851
1852 static int configure_video_filters(AVFilterGraph *graph, VideoState *is, const char *vfilters, AVFrame *frame)
1853 {
1854     static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_YUV420P, AV_PIX_FMT_BGRA, AV_PIX_FMT_NONE };
1855     char sws_flags_str[512] = "";
1856     char buffersrc_args[256];
1857     int ret;
1858     AVFilterContext *filt_src = NULL, *filt_out = NULL, *last_filter = NULL;
1859     AVCodecParameters *codecpar = is->video_st->codecpar;
1860     AVRational fr = av_guess_frame_rate(is->ic, is->video_st, NULL);
1861     AVDictionaryEntry *e = NULL;
1862
1863     while ((e = av_dict_get(sws_dict, "", e, AV_DICT_IGNORE_SUFFIX))) {
1864         if (!strcmp(e->key, "sws_flags")) {
1865             av_strlcatf(sws_flags_str, sizeof(sws_flags_str), "%s=%s:", "flags", e->value);
1866         } else
1867             av_strlcatf(sws_flags_str, sizeof(sws_flags_str), "%s=%s:", e->key, e->value);
1868     }
1869     if (strlen(sws_flags_str))
1870         sws_flags_str[strlen(sws_flags_str)-1] = '\0';
1871
1872     graph->scale_sws_opts = av_strdup(sws_flags_str);
1873
1874     snprintf(buffersrc_args, sizeof(buffersrc_args),
1875              "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d",
1876              frame->width, frame->height, frame->format,
1877              is->video_st->time_base.num, is->video_st->time_base.den,
1878              codecpar->sample_aspect_ratio.num, FFMAX(codecpar->sample_aspect_ratio.den, 1));
1879     if (fr.num && fr.den)
1880         av_strlcatf(buffersrc_args, sizeof(buffersrc_args), ":frame_rate=%d/%d", fr.num, fr.den);
1881
1882     if ((ret = avfilter_graph_create_filter(&filt_src,
1883                                             avfilter_get_by_name("buffer"),
1884                                             "ffplay_buffer", buffersrc_args, NULL,
1885                                             graph)) < 0)
1886         goto fail;
1887
1888     ret = avfilter_graph_create_filter(&filt_out,
1889                                        avfilter_get_by_name("buffersink"),
1890                                        "ffplay_buffersink", NULL, NULL, graph);
1891     if (ret < 0)
1892         goto fail;
1893
1894     if ((ret = av_opt_set_int_list(filt_out, "pix_fmts", pix_fmts,  AV_PIX_FMT_NONE, AV_OPT_SEARCH_CHILDREN)) < 0)
1895         goto fail;
1896
1897     last_filter = filt_out;
1898
1899 /* Note: this macro adds a filter before the lastly added filter, so the
1900  * processing order of the filters is in reverse */
1901 #define INSERT_FILT(name, arg) do {                                          \
1902     AVFilterContext *filt_ctx;                                               \
1903                                                                              \
1904     ret = avfilter_graph_create_filter(&filt_ctx,                            \
1905                                        avfilter_get_by_name(name),           \
1906                                        "ffplay_" name, arg, NULL, graph);    \
1907     if (ret < 0)                                                             \
1908         goto fail;                                                           \
1909                                                                              \
1910     ret = avfilter_link(filt_ctx, 0, last_filter, 0);                        \
1911     if (ret < 0)                                                             \
1912         goto fail;                                                           \
1913                                                                              \
1914     last_filter = filt_ctx;                                                  \
1915 } while (0)
1916
1917     if (autorotate) {
1918         double theta  = get_rotation(is->video_st);
1919
1920         if (fabs(theta - 90) < 1.0) {
1921             INSERT_FILT("transpose", "clock");
1922         } else if (fabs(theta - 180) < 1.0) {
1923             INSERT_FILT("hflip", NULL);
1924             INSERT_FILT("vflip", NULL);
1925         } else if (fabs(theta - 270) < 1.0) {
1926             INSERT_FILT("transpose", "cclock");
1927         } else if (fabs(theta) > 1.0) {
1928             char rotate_buf[64];
1929             snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
1930             INSERT_FILT("rotate", rotate_buf);
1931         }
1932     }
1933
1934     if ((ret = configure_filtergraph(graph, vfilters, filt_src, last_filter)) < 0)
1935         goto fail;
1936
1937     is->in_video_filter  = filt_src;
1938     is->out_video_filter = filt_out;
1939
1940 fail:
1941     return ret;
1942 }
1943
1944 static int configure_audio_filters(VideoState *is, const char *afilters, int force_output_format)
1945 {
1946     static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE };
1947     int sample_rates[2] = { 0, -1 };
1948     int64_t channel_layouts[2] = { 0, -1 };
1949     int channels[2] = { 0, -1 };
1950     AVFilterContext *filt_asrc = NULL, *filt_asink = NULL;
1951     char aresample_swr_opts[512] = "";
1952     AVDictionaryEntry *e = NULL;
1953     char asrc_args[256];
1954     int ret;
1955
1956     avfilter_graph_free(&is->agraph);
1957     if (!(is->agraph = avfilter_graph_alloc()))
1958         return AVERROR(ENOMEM);
1959
1960     while ((e = av_dict_get(swr_opts, "", e, AV_DICT_IGNORE_SUFFIX)))
1961         av_strlcatf(aresample_swr_opts, sizeof(aresample_swr_opts), "%s=%s:", e->key, e->value);
1962     if (strlen(aresample_swr_opts))
1963         aresample_swr_opts[strlen(aresample_swr_opts)-1] = '\0';
1964     av_opt_set(is->agraph, "aresample_swr_opts", aresample_swr_opts, 0);
1965
1966     ret = snprintf(asrc_args, sizeof(asrc_args),
1967                    "sample_rate=%d:sample_fmt=%s:channels=%d:time_base=%d/%d",
1968                    is->audio_filter_src.freq, av_get_sample_fmt_name(is->audio_filter_src.fmt),
1969                    is->audio_filter_src.channels,
1970                    1, is->audio_filter_src.freq);
1971     if (is->audio_filter_src.channel_layout)
1972         snprintf(asrc_args + ret, sizeof(asrc_args) - ret,
1973                  ":channel_layout=0x%"PRIx64,  is->audio_filter_src.channel_layout);
1974
1975     ret = avfilter_graph_create_filter(&filt_asrc,
1976                                        avfilter_get_by_name("abuffer"), "ffplay_abuffer",
1977                                        asrc_args, NULL, is->agraph);
1978     if (ret < 0)
1979         goto end;
1980
1981
1982     ret = avfilter_graph_create_filter(&filt_asink,
1983                                        avfilter_get_by_name("abuffersink"), "ffplay_abuffersink",
1984                                        NULL, NULL, is->agraph);
1985     if (ret < 0)
1986         goto end;
1987
1988     if ((ret = av_opt_set_int_list(filt_asink, "sample_fmts", sample_fmts,  AV_SAMPLE_FMT_NONE, AV_OPT_SEARCH_CHILDREN)) < 0)
1989         goto end;
1990     if ((ret = av_opt_set_int(filt_asink, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
1991         goto end;
1992
1993     if (force_output_format) {
1994         channel_layouts[0] = is->audio_tgt.channel_layout;
1995         channels       [0] = is->audio_tgt.channels;
1996         sample_rates   [0] = is->audio_tgt.freq;
1997         if ((ret = av_opt_set_int(filt_asink, "all_channel_counts", 0, AV_OPT_SEARCH_CHILDREN)) < 0)
1998             goto end;
1999         if ((ret = av_opt_set_int_list(filt_asink, "channel_layouts", channel_layouts,  -1, AV_OPT_SEARCH_CHILDREN)) < 0)
2000             goto end;
2001         if ((ret = av_opt_set_int_list(filt_asink, "channel_counts" , channels       ,  -1, AV_OPT_SEARCH_CHILDREN)) < 0)
2002             goto end;
2003         if ((ret = av_opt_set_int_list(filt_asink, "sample_rates"   , sample_rates   ,  -1, AV_OPT_SEARCH_CHILDREN)) < 0)
2004             goto end;
2005     }
2006
2007
2008     if ((ret = configure_filtergraph(is->agraph, afilters, filt_asrc, filt_asink)) < 0)
2009         goto end;
2010
2011     is->in_audio_filter  = filt_asrc;
2012     is->out_audio_filter = filt_asink;
2013
2014 end:
2015     if (ret < 0)
2016         avfilter_graph_free(&is->agraph);
2017     return ret;
2018 }
2019 #endif  /* CONFIG_AVFILTER */
2020
2021 static int audio_thread(void *arg)
2022 {
2023     VideoState *is = arg;
2024     AVFrame *frame = av_frame_alloc();
2025     Frame *af;
2026 #if CONFIG_AVFILTER
2027     int last_serial = -1;
2028     int64_t dec_channel_layout;
2029     int reconfigure;
2030 #endif
2031     int got_frame = 0;
2032     AVRational tb;
2033     int ret = 0;
2034
2035     if (!frame)
2036         return AVERROR(ENOMEM);
2037
2038     do {
2039         if ((got_frame = decoder_decode_frame(&is->auddec, frame, NULL)) < 0)
2040             goto the_end;
2041
2042         if (got_frame) {
2043                 tb = (AVRational){1, frame->sample_rate};
2044
2045 #if CONFIG_AVFILTER
2046                 dec_channel_layout = get_valid_channel_layout(frame->channel_layout, av_frame_get_channels(frame));
2047
2048                 reconfigure =
2049                     cmp_audio_fmts(is->audio_filter_src.fmt, is->audio_filter_src.channels,
2050                                    frame->format, av_frame_get_channels(frame))    ||
2051                     is->audio_filter_src.channel_layout != dec_channel_layout ||
2052                     is->audio_filter_src.freq           != frame->sample_rate ||
2053                     is->auddec.pkt_serial               != last_serial;
2054
2055                 if (reconfigure) {
2056                     char buf1[1024], buf2[1024];
2057                     av_get_channel_layout_string(buf1, sizeof(buf1), -1, is->audio_filter_src.channel_layout);
2058                     av_get_channel_layout_string(buf2, sizeof(buf2), -1, dec_channel_layout);
2059                     av_log(NULL, AV_LOG_DEBUG,
2060                            "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",
2061                            is->audio_filter_src.freq, is->audio_filter_src.channels, av_get_sample_fmt_name(is->audio_filter_src.fmt), buf1, last_serial,
2062                            frame->sample_rate, av_frame_get_channels(frame), av_get_sample_fmt_name(frame->format), buf2, is->auddec.pkt_serial);
2063
2064                     is->audio_filter_src.fmt            = frame->format;
2065                     is->audio_filter_src.channels       = av_frame_get_channels(frame);
2066                     is->audio_filter_src.channel_layout = dec_channel_layout;
2067                     is->audio_filter_src.freq           = frame->sample_rate;
2068                     last_serial                         = is->auddec.pkt_serial;
2069
2070                     if ((ret = configure_audio_filters(is, afilters, 1)) < 0)
2071                         goto the_end;
2072                 }
2073
2074             if ((ret = av_buffersrc_add_frame(is->in_audio_filter, frame)) < 0)
2075                 goto the_end;
2076
2077             while ((ret = av_buffersink_get_frame_flags(is->out_audio_filter, frame, 0)) >= 0) {
2078                 tb = is->out_audio_filter->inputs[0]->time_base;
2079 #endif
2080                 if (!(af = frame_queue_peek_writable(&is->sampq)))
2081                     goto the_end;
2082
2083                 af->pts = (frame->pts == AV_NOPTS_VALUE) ? NAN : frame->pts * av_q2d(tb);
2084                 af->pos = av_frame_get_pkt_pos(frame);
2085                 af->serial = is->auddec.pkt_serial;
2086                 af->duration = av_q2d((AVRational){frame->nb_samples, frame->sample_rate});
2087
2088                 av_frame_move_ref(af->frame, frame);
2089                 frame_queue_push(&is->sampq);
2090
2091 #if CONFIG_AVFILTER
2092                 if (is->audioq.serial != is->auddec.pkt_serial)
2093                     break;
2094             }
2095             if (ret == AVERROR_EOF)
2096                 is->auddec.finished = is->auddec.pkt_serial;
2097 #endif
2098         }
2099     } while (ret >= 0 || ret == AVERROR(EAGAIN) || ret == AVERROR_EOF);
2100  the_end:
2101 #if CONFIG_AVFILTER
2102     avfilter_graph_free(&is->agraph);
2103 #endif
2104     av_frame_free(&frame);
2105     return ret;
2106 }
2107
2108 static int decoder_start(Decoder *d, int (*fn)(void *), void *arg)
2109 {
2110     packet_queue_start(d->queue);
2111     d->decoder_tid = SDL_CreateThread(fn, "decoder", arg);
2112     if (!d->decoder_tid) {
2113         av_log(NULL, AV_LOG_ERROR, "SDL_CreateThread(): %s\n", SDL_GetError());
2114         return AVERROR(ENOMEM);
2115     }
2116     return 0;
2117 }
2118
2119 static int video_thread(void *arg)
2120 {
2121     VideoState *is = arg;
2122     AVFrame *frame = av_frame_alloc();
2123     double pts;
2124     double duration;
2125     int ret;
2126     AVRational tb = is->video_st->time_base;
2127     AVRational frame_rate = av_guess_frame_rate(is->ic, is->video_st, NULL);
2128
2129 #if CONFIG_AVFILTER
2130     AVFilterGraph *graph = avfilter_graph_alloc();
2131     AVFilterContext *filt_out = NULL, *filt_in = NULL;
2132     int last_w = 0;
2133     int last_h = 0;
2134     enum AVPixelFormat last_format = -2;
2135     int last_serial = -1;
2136     int last_vfilter_idx = 0;
2137     if (!graph) {
2138         av_frame_free(&frame);
2139         return AVERROR(ENOMEM);
2140     }
2141
2142 #endif
2143
2144     if (!frame) {
2145 #if CONFIG_AVFILTER
2146         avfilter_graph_free(&graph);
2147 #endif
2148         return AVERROR(ENOMEM);
2149     }
2150
2151     for (;;) {
2152         ret = get_video_frame(is, frame);
2153         if (ret < 0)
2154             goto the_end;
2155         if (!ret)
2156             continue;
2157
2158 #if CONFIG_AVFILTER
2159         if (   last_w != frame->width
2160             || last_h != frame->height
2161             || last_format != frame->format
2162             || last_serial != is->viddec.pkt_serial
2163             || last_vfilter_idx != is->vfilter_idx) {
2164             av_log(NULL, AV_LOG_DEBUG,
2165                    "Video frame changed from size:%dx%d format:%s serial:%d to size:%dx%d format:%s serial:%d\n",
2166                    last_w, last_h,
2167                    (const char *)av_x_if_null(av_get_pix_fmt_name(last_format), "none"), last_serial,
2168                    frame->width, frame->height,
2169                    (const char *)av_x_if_null(av_get_pix_fmt_name(frame->format), "none"), is->viddec.pkt_serial);
2170             avfilter_graph_free(&graph);
2171             graph = avfilter_graph_alloc();
2172             if ((ret = configure_video_filters(graph, is, vfilters_list ? vfilters_list[is->vfilter_idx] : NULL, frame)) < 0) {
2173                 SDL_Event event;
2174                 event.type = FF_QUIT_EVENT;
2175                 event.user.data1 = is;
2176                 SDL_PushEvent(&event);
2177                 goto the_end;
2178             }
2179             filt_in  = is->in_video_filter;
2180             filt_out = is->out_video_filter;
2181             last_w = frame->width;
2182             last_h = frame->height;
2183             last_format = frame->format;
2184             last_serial = is->viddec.pkt_serial;
2185             last_vfilter_idx = is->vfilter_idx;
2186             frame_rate = filt_out->inputs[0]->frame_rate;
2187         }
2188
2189         ret = av_buffersrc_add_frame(filt_in, frame);
2190         if (ret < 0)
2191             goto the_end;
2192
2193         while (ret >= 0) {
2194             is->frame_last_returned_time = av_gettime_relative() / 1000000.0;
2195
2196             ret = av_buffersink_get_frame_flags(filt_out, frame, 0);
2197             if (ret < 0) {
2198                 if (ret == AVERROR_EOF)
2199                     is->viddec.finished = is->viddec.pkt_serial;
2200                 ret = 0;
2201                 break;
2202             }
2203
2204             is->frame_last_filter_delay = av_gettime_relative() / 1000000.0 - is->frame_last_returned_time;
2205             if (fabs(is->frame_last_filter_delay) > AV_NOSYNC_THRESHOLD / 10.0)
2206                 is->frame_last_filter_delay = 0;
2207             tb = filt_out->inputs[0]->time_base;
2208 #endif
2209             duration = (frame_rate.num && frame_rate.den ? av_q2d((AVRational){frame_rate.den, frame_rate.num}) : 0);
2210             pts = (frame->pts == AV_NOPTS_VALUE) ? NAN : frame->pts * av_q2d(tb);
2211             ret = queue_picture(is, frame, pts, duration, av_frame_get_pkt_pos(frame), is->viddec.pkt_serial);
2212             av_frame_unref(frame);
2213 #if CONFIG_AVFILTER
2214         }
2215 #endif
2216
2217         if (ret < 0)
2218             goto the_end;
2219     }
2220  the_end:
2221 #if CONFIG_AVFILTER
2222     avfilter_graph_free(&graph);
2223 #endif
2224     av_frame_free(&frame);
2225     return 0;
2226 }
2227
2228 static int subtitle_thread(void *arg)
2229 {
2230     VideoState *is = arg;
2231     Frame *sp;
2232     int got_subtitle;
2233     double pts;
2234
2235     for (;;) {
2236         if (!(sp = frame_queue_peek_writable(&is->subpq)))
2237             return 0;
2238
2239         if ((got_subtitle = decoder_decode_frame(&is->subdec, NULL, &sp->sub)) < 0)
2240             break;
2241
2242         pts = 0;
2243
2244         if (got_subtitle && sp->sub.format == 0) {
2245             if (sp->sub.pts != AV_NOPTS_VALUE)
2246                 pts = sp->sub.pts / (double)AV_TIME_BASE;
2247             sp->pts = pts;
2248             sp->serial = is->subdec.pkt_serial;
2249             sp->width = is->subdec.avctx->width;
2250             sp->height = is->subdec.avctx->height;
2251             sp->uploaded = 0;
2252
2253             /* now we can update the picture count */
2254             frame_queue_push(&is->subpq);
2255         } else if (got_subtitle) {
2256             avsubtitle_free(&sp->sub);
2257         }
2258     }
2259     return 0;
2260 }
2261
2262 /* copy samples for viewing in editor window */
2263 static void update_sample_display(VideoState *is, short *samples, int samples_size)
2264 {
2265     int size, len;
2266
2267     size = samples_size / sizeof(short);
2268     while (size > 0) {
2269         len = SAMPLE_ARRAY_SIZE - is->sample_array_index;
2270         if (len > size)
2271             len = size;
2272         memcpy(is->sample_array + is->sample_array_index, samples, len * sizeof(short));
2273         samples += len;
2274         is->sample_array_index += len;
2275         if (is->sample_array_index >= SAMPLE_ARRAY_SIZE)
2276             is->sample_array_index = 0;
2277         size -= len;
2278     }
2279 }
2280
2281 /* return the wanted number of samples to get better sync if sync_type is video
2282  * or external master clock */
2283 static int synchronize_audio(VideoState *is, int nb_samples)
2284 {
2285     int wanted_nb_samples = nb_samples;
2286
2287     /* if not master, then we try to remove or add samples to correct the clock */
2288     if (get_master_sync_type(is) != AV_SYNC_AUDIO_MASTER) {
2289         double diff, avg_diff;
2290         int min_nb_samples, max_nb_samples;
2291
2292         diff = get_clock(&is->audclk) - get_master_clock(is);
2293
2294         if (!isnan(diff) && fabs(diff) < AV_NOSYNC_THRESHOLD) {
2295             is->audio_diff_cum = diff + is->audio_diff_avg_coef * is->audio_diff_cum;
2296             if (is->audio_diff_avg_count < AUDIO_DIFF_AVG_NB) {
2297                 /* not enough measures to have a correct estimate */
2298                 is->audio_diff_avg_count++;
2299             } else {
2300                 /* estimate the A-V difference */
2301                 avg_diff = is->audio_diff_cum * (1.0 - is->audio_diff_avg_coef);
2302
2303                 if (fabs(avg_diff) >= is->audio_diff_threshold) {
2304                     wanted_nb_samples = nb_samples + (int)(diff * is->audio_src.freq);
2305                     min_nb_samples = ((nb_samples * (100 - SAMPLE_CORRECTION_PERCENT_MAX) / 100));
2306                     max_nb_samples = ((nb_samples * (100 + SAMPLE_CORRECTION_PERCENT_MAX) / 100));
2307                     wanted_nb_samples = av_clip(wanted_nb_samples, min_nb_samples, max_nb_samples);
2308                 }
2309                 av_log(NULL, AV_LOG_TRACE, "diff=%f adiff=%f sample_diff=%d apts=%0.3f %f\n",
2310                         diff, avg_diff, wanted_nb_samples - nb_samples,
2311                         is->audio_clock, is->audio_diff_threshold);
2312             }
2313         } else {
2314             /* too big difference : may be initial PTS errors, so
2315                reset A-V filter */
2316             is->audio_diff_avg_count = 0;
2317             is->audio_diff_cum       = 0;
2318         }
2319     }
2320
2321     return wanted_nb_samples;
2322 }
2323
2324 /**
2325  * Decode one audio frame and return its uncompressed size.
2326  *
2327  * The processed audio frame is decoded, converted if required, and
2328  * stored in is->audio_buf, with size in bytes given by the return
2329  * value.
2330  */
2331 static int audio_decode_frame(VideoState *is)
2332 {
2333     int data_size, resampled_data_size;
2334     int64_t dec_channel_layout;
2335     av_unused double audio_clock0;
2336     int wanted_nb_samples;
2337     Frame *af;
2338
2339     if (is->paused)
2340         return -1;
2341
2342     do {
2343 #if defined(_WIN32)
2344         while (frame_queue_nb_remaining(&is->sampq) == 0) {
2345             if ((av_gettime_relative() - audio_callback_time) > 1000000LL * is->audio_hw_buf_size / is->audio_tgt.bytes_per_sec / 2)
2346                 return -1;
2347             av_usleep (1000);
2348         }
2349 #endif
2350         if (!(af = frame_queue_peek_readable(&is->sampq)))
2351             return -1;
2352         frame_queue_next(&is->sampq);
2353     } while (af->serial != is->audioq.serial);
2354
2355     data_size = av_samples_get_buffer_size(NULL, av_frame_get_channels(af->frame),
2356                                            af->frame->nb_samples,
2357                                            af->frame->format, 1);
2358
2359     dec_channel_layout =
2360         (af->frame->channel_layout && av_frame_get_channels(af->frame) == av_get_channel_layout_nb_channels(af->frame->channel_layout)) ?
2361         af->frame->channel_layout : av_get_default_channel_layout(av_frame_get_channels(af->frame));
2362     wanted_nb_samples = synchronize_audio(is, af->frame->nb_samples);
2363
2364     if (af->frame->format        != is->audio_src.fmt            ||
2365         dec_channel_layout       != is->audio_src.channel_layout ||
2366         af->frame->sample_rate   != is->audio_src.freq           ||
2367         (wanted_nb_samples       != af->frame->nb_samples && !is->swr_ctx)) {
2368         swr_free(&is->swr_ctx);
2369         is->swr_ctx = swr_alloc_set_opts(NULL,
2370                                          is->audio_tgt.channel_layout, is->audio_tgt.fmt, is->audio_tgt.freq,
2371                                          dec_channel_layout,           af->frame->format, af->frame->sample_rate,
2372                                          0, NULL);
2373         if (!is->swr_ctx || swr_init(is->swr_ctx) < 0) {
2374             av_log(NULL, AV_LOG_ERROR,
2375                    "Cannot create sample rate converter for conversion of %d Hz %s %d channels to %d Hz %s %d channels!\n",
2376                     af->frame->sample_rate, av_get_sample_fmt_name(af->frame->format), av_frame_get_channels(af->frame),
2377                     is->audio_tgt.freq, av_get_sample_fmt_name(is->audio_tgt.fmt), is->audio_tgt.channels);
2378             swr_free(&is->swr_ctx);
2379             return -1;
2380         }
2381         is->audio_src.channel_layout = dec_channel_layout;
2382         is->audio_src.channels       = av_frame_get_channels(af->frame);
2383         is->audio_src.freq = af->frame->sample_rate;
2384         is->audio_src.fmt = af->frame->format;
2385     }
2386
2387     if (is->swr_ctx) {
2388         const uint8_t **in = (const uint8_t **)af->frame->extended_data;
2389         uint8_t **out = &is->audio_buf1;
2390         int out_count = (int64_t)wanted_nb_samples * is->audio_tgt.freq / af->frame->sample_rate + 256;
2391         int out_size  = av_samples_get_buffer_size(NULL, is->audio_tgt.channels, out_count, is->audio_tgt.fmt, 0);
2392         int len2;
2393         if (out_size < 0) {
2394             av_log(NULL, AV_LOG_ERROR, "av_samples_get_buffer_size() failed\n");
2395             return -1;
2396         }
2397         if (wanted_nb_samples != af->frame->nb_samples) {
2398             if (swr_set_compensation(is->swr_ctx, (wanted_nb_samples - af->frame->nb_samples) * is->audio_tgt.freq / af->frame->sample_rate,
2399                                         wanted_nb_samples * is->audio_tgt.freq / af->frame->sample_rate) < 0) {
2400                 av_log(NULL, AV_LOG_ERROR, "swr_set_compensation() failed\n");
2401                 return -1;
2402             }
2403         }
2404         av_fast_malloc(&is->audio_buf1, &is->audio_buf1_size, out_size);
2405         if (!is->audio_buf1)
2406             return AVERROR(ENOMEM);
2407         len2 = swr_convert(is->swr_ctx, out, out_count, in, af->frame->nb_samples);
2408         if (len2 < 0) {
2409             av_log(NULL, AV_LOG_ERROR, "swr_convert() failed\n");
2410             return -1;
2411         }
2412         if (len2 == out_count) {
2413             av_log(NULL, AV_LOG_WARNING, "audio buffer is probably too small\n");
2414             if (swr_init(is->swr_ctx) < 0)
2415                 swr_free(&is->swr_ctx);
2416         }
2417         is->audio_buf = is->audio_buf1;
2418         resampled_data_size = len2 * is->audio_tgt.channels * av_get_bytes_per_sample(is->audio_tgt.fmt);
2419     } else {
2420         is->audio_buf = af->frame->data[0];
2421         resampled_data_size = data_size;
2422     }
2423
2424     audio_clock0 = is->audio_clock;
2425     /* update the audio clock with the pts */
2426     if (!isnan(af->pts))
2427         is->audio_clock = af->pts + (double) af->frame->nb_samples / af->frame->sample_rate;
2428     else
2429         is->audio_clock = NAN;
2430     is->audio_clock_serial = af->serial;
2431 #ifdef DEBUG
2432     {
2433         static double last_clock;
2434         printf("audio: delay=%0.3f clock=%0.3f clock0=%0.3f\n",
2435                is->audio_clock - last_clock,
2436                is->audio_clock, audio_clock0);
2437         last_clock = is->audio_clock;
2438     }
2439 #endif
2440     return resampled_data_size;
2441 }
2442
2443 /* prepare a new audio buffer */
2444 static void sdl_audio_callback(void *opaque, Uint8 *stream, int len)
2445 {
2446     VideoState *is = opaque;
2447     int audio_size, len1;
2448
2449     audio_callback_time = av_gettime_relative();
2450
2451     while (len > 0) {
2452         if (is->audio_buf_index >= is->audio_buf_size) {
2453            audio_size = audio_decode_frame(is);
2454            if (audio_size < 0) {
2455                 /* if error, just output silence */
2456                is->audio_buf = NULL;
2457                is->audio_buf_size = SDL_AUDIO_MIN_BUFFER_SIZE / is->audio_tgt.frame_size * is->audio_tgt.frame_size;
2458            } else {
2459                if (is->show_mode != SHOW_MODE_VIDEO)
2460                    update_sample_display(is, (int16_t *)is->audio_buf, audio_size);
2461                is->audio_buf_size = audio_size;
2462            }
2463            is->audio_buf_index = 0;
2464         }
2465         len1 = is->audio_buf_size - is->audio_buf_index;
2466         if (len1 > len)
2467             len1 = len;
2468         if (!is->muted && is->audio_buf && is->audio_volume == SDL_MIX_MAXVOLUME)
2469             memcpy(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, len1);
2470         else {
2471             memset(stream, 0, len1);
2472             if (!is->muted && is->audio_buf)
2473                 SDL_MixAudio(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, len1, is->audio_volume);
2474         }
2475         len -= len1;
2476         stream += len1;
2477         is->audio_buf_index += len1;
2478     }
2479     is->audio_write_buf_size = is->audio_buf_size - is->audio_buf_index;
2480     /* Let's assume the audio driver that is used by SDL has two periods. */
2481     if (!isnan(is->audio_clock)) {
2482         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);
2483         sync_clock_to_slave(&is->extclk, &is->audclk);
2484     }
2485 }
2486
2487 static int audio_open(void *opaque, int64_t wanted_channel_layout, int wanted_nb_channels, int wanted_sample_rate, struct AudioParams *audio_hw_params)
2488 {
2489     SDL_AudioSpec wanted_spec, spec;
2490     const char *env;
2491     static const int next_nb_channels[] = {0, 0, 1, 6, 2, 6, 4, 6};
2492     static const int next_sample_rates[] = {0, 44100, 48000, 96000, 192000};
2493     int next_sample_rate_idx = FF_ARRAY_ELEMS(next_sample_rates) - 1;
2494
2495     env = SDL_getenv("SDL_AUDIO_CHANNELS");
2496     if (env) {
2497         wanted_nb_channels = atoi(env);
2498         wanted_channel_layout = av_get_default_channel_layout(wanted_nb_channels);
2499     }
2500     if (!wanted_channel_layout || wanted_nb_channels != av_get_channel_layout_nb_channels(wanted_channel_layout)) {
2501         wanted_channel_layout = av_get_default_channel_layout(wanted_nb_channels);
2502         wanted_channel_layout &= ~AV_CH_LAYOUT_STEREO_DOWNMIX;
2503     }
2504     wanted_nb_channels = av_get_channel_layout_nb_channels(wanted_channel_layout);
2505     wanted_spec.channels = wanted_nb_channels;
2506     wanted_spec.freq = wanted_sample_rate;
2507     if (wanted_spec.freq <= 0 || wanted_spec.channels <= 0) {
2508         av_log(NULL, AV_LOG_ERROR, "Invalid sample rate or channel count!\n");
2509         return -1;
2510     }
2511     while (next_sample_rate_idx && next_sample_rates[next_sample_rate_idx] >= wanted_spec.freq)
2512         next_sample_rate_idx--;
2513     wanted_spec.format = AUDIO_S16SYS;
2514     wanted_spec.silence = 0;
2515     wanted_spec.samples = FFMAX(SDL_AUDIO_MIN_BUFFER_SIZE, 2 << av_log2(wanted_spec.freq / SDL_AUDIO_MAX_CALLBACKS_PER_SEC));
2516     wanted_spec.callback = sdl_audio_callback;
2517     wanted_spec.userdata = opaque;
2518     while (SDL_OpenAudio(&wanted_spec, &spec) < 0) {
2519         av_log(NULL, AV_LOG_WARNING, "SDL_OpenAudio (%d channels, %d Hz): %s\n",
2520                wanted_spec.channels, wanted_spec.freq, SDL_GetError());
2521         wanted_spec.channels = next_nb_channels[FFMIN(7, wanted_spec.channels)];
2522         if (!wanted_spec.channels) {
2523             wanted_spec.freq = next_sample_rates[next_sample_rate_idx--];
2524             wanted_spec.channels = wanted_nb_channels;
2525             if (!wanted_spec.freq) {
2526                 av_log(NULL, AV_LOG_ERROR,
2527                        "No more combinations to try, audio open failed\n");
2528                 return -1;
2529             }
2530         }
2531         wanted_channel_layout = av_get_default_channel_layout(wanted_spec.channels);
2532     }
2533     if (spec.format != AUDIO_S16SYS) {
2534         av_log(NULL, AV_LOG_ERROR,
2535                "SDL advised audio format %d is not supported!\n", spec.format);
2536         return -1;
2537     }
2538     if (spec.channels != wanted_spec.channels) {
2539         wanted_channel_layout = av_get_default_channel_layout(spec.channels);
2540         if (!wanted_channel_layout) {
2541             av_log(NULL, AV_LOG_ERROR,
2542                    "SDL advised channel count %d is not supported!\n", spec.channels);
2543             return -1;
2544         }
2545     }
2546
2547     audio_hw_params->fmt = AV_SAMPLE_FMT_S16;
2548     audio_hw_params->freq = spec.freq;
2549     audio_hw_params->channel_layout = wanted_channel_layout;
2550     audio_hw_params->channels =  spec.channels;
2551     audio_hw_params->frame_size = av_samples_get_buffer_size(NULL, audio_hw_params->channels, 1, audio_hw_params->fmt, 1);
2552     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);
2553     if (audio_hw_params->bytes_per_sec <= 0 || audio_hw_params->frame_size <= 0) {
2554         av_log(NULL, AV_LOG_ERROR, "av_samples_get_buffer_size failed\n");
2555         return -1;
2556     }
2557     return spec.size;
2558 }
2559
2560 /* open a given stream. Return 0 if OK */
2561 static int stream_component_open(VideoState *is, int stream_index)
2562 {
2563     AVFormatContext *ic = is->ic;
2564     AVCodecContext *avctx;
2565     AVCodec *codec;
2566     const char *forced_codec_name = NULL;
2567     AVDictionary *opts = NULL;
2568     AVDictionaryEntry *t = NULL;
2569     int sample_rate, nb_channels;
2570     int64_t channel_layout;
2571     int ret = 0;
2572     int stream_lowres = lowres;
2573
2574     if (stream_index < 0 || stream_index >= ic->nb_streams)
2575         return -1;
2576
2577     avctx = avcodec_alloc_context3(NULL);
2578     if (!avctx)
2579         return AVERROR(ENOMEM);
2580
2581     ret = avcodec_parameters_to_context(avctx, ic->streams[stream_index]->codecpar);
2582     if (ret < 0)
2583         goto fail;
2584     av_codec_set_pkt_timebase(avctx, ic->streams[stream_index]->time_base);
2585
2586     codec = avcodec_find_decoder(avctx->codec_id);
2587
2588     switch(avctx->codec_type){
2589         case AVMEDIA_TYPE_AUDIO   : is->last_audio_stream    = stream_index; forced_codec_name =    audio_codec_name; break;
2590         case AVMEDIA_TYPE_SUBTITLE: is->last_subtitle_stream = stream_index; forced_codec_name = subtitle_codec_name; break;
2591         case AVMEDIA_TYPE_VIDEO   : is->last_video_stream    = stream_index; forced_codec_name =    video_codec_name; break;
2592     }
2593     if (forced_codec_name)
2594         codec = avcodec_find_decoder_by_name(forced_codec_name);
2595     if (!codec) {
2596         if (forced_codec_name) av_log(NULL, AV_LOG_WARNING,
2597                                       "No codec could be found with name '%s'\n", forced_codec_name);
2598         else                   av_log(NULL, AV_LOG_WARNING,
2599                                       "No codec could be found with id %d\n", avctx->codec_id);
2600         ret = AVERROR(EINVAL);
2601         goto fail;
2602     }
2603
2604     avctx->codec_id = codec->id;
2605     if(stream_lowres > av_codec_get_max_lowres(codec)){
2606         av_log(avctx, AV_LOG_WARNING, "The maximum value for lowres supported by the decoder is %d\n",
2607                 av_codec_get_max_lowres(codec));
2608         stream_lowres = av_codec_get_max_lowres(codec);
2609     }
2610     av_codec_set_lowres(avctx, stream_lowres);
2611
2612 #if FF_API_EMU_EDGE
2613     if(stream_lowres) avctx->flags |= CODEC_FLAG_EMU_EDGE;
2614 #endif
2615     if (fast)
2616         avctx->flags2 |= AV_CODEC_FLAG2_FAST;
2617 #if FF_API_EMU_EDGE
2618     if(codec->capabilities & AV_CODEC_CAP_DR1)
2619         avctx->flags |= CODEC_FLAG_EMU_EDGE;
2620 #endif
2621
2622     opts = filter_codec_opts(codec_opts, avctx->codec_id, ic, ic->streams[stream_index], codec);
2623     if (!av_dict_get(opts, "threads", NULL, 0))
2624         av_dict_set(&opts, "threads", "auto", 0);
2625     if (stream_lowres)
2626         av_dict_set_int(&opts, "lowres", stream_lowres, 0);
2627     if (avctx->codec_type == AVMEDIA_TYPE_VIDEO || avctx->codec_type == AVMEDIA_TYPE_AUDIO)
2628         av_dict_set(&opts, "refcounted_frames", "1", 0);
2629     if ((ret = avcodec_open2(avctx, codec, &opts)) < 0) {
2630         goto fail;
2631     }
2632     if ((t = av_dict_get(opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2633         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2634         ret =  AVERROR_OPTION_NOT_FOUND;
2635         goto fail;
2636     }
2637
2638     is->eof = 0;
2639     ic->streams[stream_index]->discard = AVDISCARD_DEFAULT;
2640     switch (avctx->codec_type) {
2641     case AVMEDIA_TYPE_AUDIO:
2642 #if CONFIG_AVFILTER
2643         {
2644             AVFilterLink *link;
2645
2646             is->audio_filter_src.freq           = avctx->sample_rate;
2647             is->audio_filter_src.channels       = avctx->channels;
2648             is->audio_filter_src.channel_layout = get_valid_channel_layout(avctx->channel_layout, avctx->channels);
2649             is->audio_filter_src.fmt            = avctx->sample_fmt;
2650             if ((ret = configure_audio_filters(is, afilters, 0)) < 0)
2651                 goto fail;
2652             link = is->out_audio_filter->inputs[0];
2653             sample_rate    = link->sample_rate;
2654             nb_channels    = avfilter_link_get_channels(link);
2655             channel_layout = link->channel_layout;
2656         }
2657 #else
2658         sample_rate    = avctx->sample_rate;
2659         nb_channels    = avctx->channels;
2660         channel_layout = avctx->channel_layout;
2661 #endif
2662
2663         /* prepare audio output */
2664         if ((ret = audio_open(is, channel_layout, nb_channels, sample_rate, &is->audio_tgt)) < 0)
2665             goto fail;
2666         is->audio_hw_buf_size = ret;
2667         is->audio_src = is->audio_tgt;
2668         is->audio_buf_size  = 0;
2669         is->audio_buf_index = 0;
2670
2671         /* init averaging filter */
2672         is->audio_diff_avg_coef  = exp(log(0.01) / AUDIO_DIFF_AVG_NB);
2673         is->audio_diff_avg_count = 0;
2674         /* since we do not have a precise anough audio FIFO fullness,
2675            we correct audio sync only if larger than this threshold */
2676         is->audio_diff_threshold = (double)(is->audio_hw_buf_size) / is->audio_tgt.bytes_per_sec;
2677
2678         is->audio_stream = stream_index;
2679         is->audio_st = ic->streams[stream_index];
2680
2681         decoder_init(&is->auddec, avctx, &is->audioq, is->continue_read_thread);
2682         if ((is->ic->iformat->flags & (AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK)) && !is->ic->iformat->read_seek) {
2683             is->auddec.start_pts = is->audio_st->start_time;
2684             is->auddec.start_pts_tb = is->audio_st->time_base;
2685         }
2686         if ((ret = decoder_start(&is->auddec, audio_thread, is)) < 0)
2687             goto out;
2688         SDL_PauseAudio(0);
2689         break;
2690     case AVMEDIA_TYPE_VIDEO:
2691         is->video_stream = stream_index;
2692         is->video_st = ic->streams[stream_index];
2693
2694         decoder_init(&is->viddec, avctx, &is->videoq, is->continue_read_thread);
2695         if ((ret = decoder_start(&is->viddec, video_thread, is)) < 0)
2696             goto out;
2697         is->queue_attachments_req = 1;
2698         break;
2699     case AVMEDIA_TYPE_SUBTITLE:
2700         is->subtitle_stream = stream_index;
2701         is->subtitle_st = ic->streams[stream_index];
2702
2703         decoder_init(&is->subdec, avctx, &is->subtitleq, is->continue_read_thread);
2704         if ((ret = decoder_start(&is->subdec, subtitle_thread, is)) < 0)
2705             goto out;
2706         break;
2707     default:
2708         break;
2709     }
2710     goto out;
2711
2712 fail:
2713     avcodec_free_context(&avctx);
2714 out:
2715     av_dict_free(&opts);
2716
2717     return ret;
2718 }
2719
2720 static int decode_interrupt_cb(void *ctx)
2721 {
2722     VideoState *is = ctx;
2723     return is->abort_request;
2724 }
2725
2726 static int stream_has_enough_packets(AVStream *st, int stream_id, PacketQueue *queue) {
2727     return stream_id < 0 ||
2728            queue->abort_request ||
2729            (st->disposition & AV_DISPOSITION_ATTACHED_PIC) ||
2730            queue->nb_packets > MIN_FRAMES && (!queue->duration || av_q2d(st->time_base) * queue->duration > 1.0);
2731 }
2732
2733 static int is_realtime(AVFormatContext *s)
2734 {
2735     if(   !strcmp(s->iformat->name, "rtp")
2736        || !strcmp(s->iformat->name, "rtsp")
2737        || !strcmp(s->iformat->name, "sdp")
2738     )
2739         return 1;
2740
2741     if(s->pb && (   !strncmp(s->filename, "rtp:", 4)
2742                  || !strncmp(s->filename, "udp:", 4)
2743                 )
2744     )
2745         return 1;
2746     return 0;
2747 }
2748
2749 /* this thread gets the stream from the disk or the network */
2750 static int read_thread(void *arg)
2751 {
2752     VideoState *is = arg;
2753     AVFormatContext *ic = NULL;
2754     int err, i, ret;
2755     int st_index[AVMEDIA_TYPE_NB];
2756     AVPacket pkt1, *pkt = &pkt1;
2757     int64_t stream_start_time;
2758     int pkt_in_play_range = 0;
2759     AVDictionaryEntry *t;
2760     AVDictionary **opts;
2761     int orig_nb_streams;
2762     SDL_mutex *wait_mutex = SDL_CreateMutex();
2763     int scan_all_pmts_set = 0;
2764     int64_t pkt_ts;
2765
2766     if (!wait_mutex) {
2767         av_log(NULL, AV_LOG_FATAL, "SDL_CreateMutex(): %s\n", SDL_GetError());
2768         ret = AVERROR(ENOMEM);
2769         goto fail;
2770     }
2771
2772     memset(st_index, -1, sizeof(st_index));
2773     is->last_video_stream = is->video_stream = -1;
2774     is->last_audio_stream = is->audio_stream = -1;
2775     is->last_subtitle_stream = is->subtitle_stream = -1;
2776     is->eof = 0;
2777
2778     ic = avformat_alloc_context();
2779     if (!ic) {
2780         av_log(NULL, AV_LOG_FATAL, "Could not allocate context.\n");
2781         ret = AVERROR(ENOMEM);
2782         goto fail;
2783     }
2784     ic->interrupt_callback.callback = decode_interrupt_cb;
2785     ic->interrupt_callback.opaque = is;
2786     if (!av_dict_get(format_opts, "scan_all_pmts", NULL, AV_DICT_MATCH_CASE)) {
2787         av_dict_set(&format_opts, "scan_all_pmts", "1", AV_DICT_DONT_OVERWRITE);
2788         scan_all_pmts_set = 1;
2789     }
2790     err = avformat_open_input(&ic, is->filename, is->iformat, &format_opts);
2791     if (err < 0) {
2792         print_error(is->filename, err);
2793         ret = -1;
2794         goto fail;
2795     }
2796     if (scan_all_pmts_set)
2797         av_dict_set(&format_opts, "scan_all_pmts", NULL, AV_DICT_MATCH_CASE);
2798
2799     if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2800         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2801         ret = AVERROR_OPTION_NOT_FOUND;
2802         goto fail;
2803     }
2804     is->ic = ic;
2805
2806     if (genpts)
2807         ic->flags |= AVFMT_FLAG_GENPTS;
2808
2809     av_format_inject_global_side_data(ic);
2810
2811     opts = setup_find_stream_info_opts(ic, codec_opts);
2812     orig_nb_streams = ic->nb_streams;
2813
2814     err = avformat_find_stream_info(ic, opts);
2815
2816     for (i = 0; i < orig_nb_streams; i++)
2817         av_dict_free(&opts[i]);
2818     av_freep(&opts);
2819
2820     if (err < 0) {
2821         av_log(NULL, AV_LOG_WARNING,
2822                "%s: could not find codec parameters\n", is->filename);
2823         ret = -1;
2824         goto fail;
2825     }
2826
2827     if (ic->pb)
2828         ic->pb->eof_reached = 0; // FIXME hack, ffplay maybe should not use avio_feof() to test for the end
2829
2830     if (seek_by_bytes < 0)
2831         seek_by_bytes = !!(ic->iformat->flags & AVFMT_TS_DISCONT) && strcmp("ogg", ic->iformat->name);
2832
2833     is->max_frame_duration = (ic->iformat->flags & AVFMT_TS_DISCONT) ? 10.0 : 3600.0;
2834
2835     if (!window_title && (t = av_dict_get(ic->metadata, "title", NULL, 0)))
2836         window_title = av_asprintf("%s - %s", t->value, input_filename);
2837
2838     /* if seeking requested, we execute it */
2839     if (start_time != AV_NOPTS_VALUE) {
2840         int64_t timestamp;
2841
2842         timestamp = start_time;
2843         /* add the stream start time */
2844         if (ic->start_time != AV_NOPTS_VALUE)
2845             timestamp += ic->start_time;
2846         ret = avformat_seek_file(ic, -1, INT64_MIN, timestamp, INT64_MAX, 0);
2847         if (ret < 0) {
2848             av_log(NULL, AV_LOG_WARNING, "%s: could not seek to position %0.3f\n",
2849                     is->filename, (double)timestamp / AV_TIME_BASE);
2850         }
2851     }
2852
2853     is->realtime = is_realtime(ic);
2854
2855     if (show_status)
2856         av_dump_format(ic, 0, is->filename, 0);
2857
2858     for (i = 0; i < ic->nb_streams; i++) {
2859         AVStream *st = ic->streams[i];
2860         enum AVMediaType type = st->codecpar->codec_type;
2861         st->discard = AVDISCARD_ALL;
2862         if (type >= 0 && wanted_stream_spec[type] && st_index[type] == -1)
2863             if (avformat_match_stream_specifier(ic, st, wanted_stream_spec[type]) > 0)
2864                 st_index[type] = i;
2865     }
2866     for (i = 0; i < AVMEDIA_TYPE_NB; i++) {
2867         if (wanted_stream_spec[i] && st_index[i] == -1) {
2868             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));
2869             st_index[i] = INT_MAX;
2870         }
2871     }
2872
2873     if (!video_disable)
2874         st_index[AVMEDIA_TYPE_VIDEO] =
2875             av_find_best_stream(ic, AVMEDIA_TYPE_VIDEO,
2876                                 st_index[AVMEDIA_TYPE_VIDEO], -1, NULL, 0);
2877     if (!audio_disable)
2878         st_index[AVMEDIA_TYPE_AUDIO] =
2879             av_find_best_stream(ic, AVMEDIA_TYPE_AUDIO,
2880                                 st_index[AVMEDIA_TYPE_AUDIO],
2881                                 st_index[AVMEDIA_TYPE_VIDEO],
2882                                 NULL, 0);
2883     if (!video_disable && !subtitle_disable)
2884         st_index[AVMEDIA_TYPE_SUBTITLE] =
2885             av_find_best_stream(ic, AVMEDIA_TYPE_SUBTITLE,
2886                                 st_index[AVMEDIA_TYPE_SUBTITLE],
2887                                 (st_index[AVMEDIA_TYPE_AUDIO] >= 0 ?
2888                                  st_index[AVMEDIA_TYPE_AUDIO] :
2889                                  st_index[AVMEDIA_TYPE_VIDEO]),
2890                                 NULL, 0);
2891
2892     is->show_mode = show_mode;
2893     if (st_index[AVMEDIA_TYPE_VIDEO] >= 0) {
2894         AVStream *st = ic->streams[st_index[AVMEDIA_TYPE_VIDEO]];
2895         AVCodecParameters *codecpar = st->codecpar;
2896         AVRational sar = av_guess_sample_aspect_ratio(ic, st, NULL);
2897         if (codecpar->width)
2898             set_default_window_size(codecpar->width, codecpar->height, sar);
2899     }
2900
2901     /* open the streams */
2902     if (st_index[AVMEDIA_TYPE_AUDIO] >= 0) {
2903         stream_component_open(is, st_index[AVMEDIA_TYPE_AUDIO]);
2904     }
2905
2906     ret = -1;
2907     if (st_index[AVMEDIA_TYPE_VIDEO] >= 0) {
2908         ret = stream_component_open(is, st_index[AVMEDIA_TYPE_VIDEO]);
2909     }
2910     if (is->show_mode == SHOW_MODE_NONE)
2911         is->show_mode = ret >= 0 ? SHOW_MODE_VIDEO : SHOW_MODE_RDFT;
2912
2913     if (st_index[AVMEDIA_TYPE_SUBTITLE] >= 0) {
2914         stream_component_open(is, st_index[AVMEDIA_TYPE_SUBTITLE]);
2915     }
2916
2917     if (is->video_stream < 0 && is->audio_stream < 0) {
2918         av_log(NULL, AV_LOG_FATAL, "Failed to open file '%s' or configure filtergraph\n",
2919                is->filename);
2920         ret = -1;
2921         goto fail;
2922     }
2923
2924     if (infinite_buffer < 0 && is->realtime)
2925         infinite_buffer = 1;
2926
2927     for (;;) {
2928         if (is->abort_request)
2929             break;
2930         if (is->paused != is->last_paused) {
2931             is->last_paused = is->paused;
2932             if (is->paused)
2933                 is->read_pause_return = av_read_pause(ic);
2934             else
2935                 av_read_play(ic);
2936         }
2937 #if CONFIG_RTSP_DEMUXER || CONFIG_MMSH_PROTOCOL
2938         if (is->paused &&
2939                 (!strcmp(ic->iformat->name, "rtsp") ||
2940                  (ic->pb && !strncmp(input_filename, "mmsh:", 5)))) {
2941             /* wait 10 ms to avoid trying to get another packet */
2942             /* XXX: horrible */
2943             SDL_Delay(10);
2944             continue;
2945         }
2946 #endif
2947         if (is->seek_req) {
2948             int64_t seek_target = is->seek_pos;
2949             int64_t seek_min    = is->seek_rel > 0 ? seek_target - is->seek_rel + 2: INT64_MIN;
2950             int64_t seek_max    = is->seek_rel < 0 ? seek_target - is->seek_rel - 2: INT64_MAX;
2951 // FIXME the +-2 is due to rounding being not done in the correct direction in generation
2952 //      of the seek_pos/seek_rel variables
2953
2954             ret = avformat_seek_file(is->ic, -1, seek_min, seek_target, seek_max, is->seek_flags);
2955             if (ret < 0) {
2956                 av_log(NULL, AV_LOG_ERROR,
2957                        "%s: error while seeking\n", is->ic->filename);
2958             } else {
2959                 if (is->audio_stream >= 0) {
2960                     packet_queue_flush(&is->audioq);
2961                     packet_queue_put(&is->audioq, &flush_pkt);
2962                 }
2963                 if (is->subtitle_stream >= 0) {
2964                     packet_queue_flush(&is->subtitleq);
2965                     packet_queue_put(&is->subtitleq, &flush_pkt);
2966                 }
2967                 if (is->video_stream >= 0) {
2968                     packet_queue_flush(&is->videoq);
2969                     packet_queue_put(&is->videoq, &flush_pkt);
2970                 }
2971                 if (is->seek_flags & AVSEEK_FLAG_BYTE) {
2972                    set_clock(&is->extclk, NAN, 0);
2973                 } else {
2974                    set_clock(&is->extclk, seek_target / (double)AV_TIME_BASE, 0);
2975                 }
2976             }
2977             is->seek_req = 0;
2978             is->queue_attachments_req = 1;
2979             is->eof = 0;
2980             if (is->paused)
2981                 step_to_next_frame(is);
2982         }
2983         if (is->queue_attachments_req) {
2984             if (is->video_st && is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC) {
2985                 AVPacket copy;
2986                 if ((ret = av_copy_packet(&copy, &is->video_st->attached_pic)) < 0)
2987                     goto fail;
2988                 packet_queue_put(&is->videoq, &copy);
2989                 packet_queue_put_nullpacket(&is->videoq, is->video_stream);
2990             }
2991             is->queue_attachments_req = 0;
2992         }
2993
2994         /* if the queue are full, no need to read more */
2995         if (infinite_buffer<1 &&
2996               (is->audioq.size + is->videoq.size + is->subtitleq.size > MAX_QUEUE_SIZE
2997             || (stream_has_enough_packets(is->audio_st, is->audio_stream, &is->audioq) &&
2998                 stream_has_enough_packets(is->video_st, is->video_stream, &is->videoq) &&
2999                 stream_has_enough_packets(is->subtitle_st, is->subtitle_stream, &is->subtitleq)))) {
3000             /* wait 10 ms */
3001             SDL_LockMutex(wait_mutex);
3002             SDL_CondWaitTimeout(is->continue_read_thread, wait_mutex, 10);
3003             SDL_UnlockMutex(wait_mutex);
3004             continue;
3005         }
3006         if (!is->paused &&
3007             (!is->audio_st || (is->auddec.finished == is->audioq.serial && frame_queue_nb_remaining(&is->sampq) == 0)) &&
3008             (!is->video_st || (is->viddec.finished == is->videoq.serial && frame_queue_nb_remaining(&is->pictq) == 0))) {
3009             if (loop != 1 && (!loop || --loop)) {
3010                 stream_seek(is, start_time != AV_NOPTS_VALUE ? start_time : 0, 0, 0);
3011             } else if (autoexit) {
3012                 ret = AVERROR_EOF;
3013                 goto fail;
3014             }
3015         }
3016         ret = av_read_frame(ic, pkt);
3017         if (ret < 0) {
3018             if ((ret == AVERROR_EOF || avio_feof(ic->pb)) && !is->eof) {
3019                 if (is->video_stream >= 0)
3020                     packet_queue_put_nullpacket(&is->videoq, is->video_stream);
3021                 if (is->audio_stream >= 0)
3022                     packet_queue_put_nullpacket(&is->audioq, is->audio_stream);
3023                 if (is->subtitle_stream >= 0)
3024                     packet_queue_put_nullpacket(&is->subtitleq, is->subtitle_stream);
3025                 is->eof = 1;
3026             }
3027             if (ic->pb && ic->pb->error)
3028                 break;
3029             SDL_LockMutex(wait_mutex);
3030             SDL_CondWaitTimeout(is->continue_read_thread, wait_mutex, 10);
3031             SDL_UnlockMutex(wait_mutex);
3032             continue;
3033         } else {
3034             is->eof = 0;
3035         }
3036         /* check if packet is in play range specified by user, then queue, otherwise discard */
3037         stream_start_time = ic->streams[pkt->stream_index]->start_time;
3038         pkt_ts = pkt->pts == AV_NOPTS_VALUE ? pkt->dts : pkt->pts;
3039         pkt_in_play_range = duration == AV_NOPTS_VALUE ||
3040                 (pkt_ts - (stream_start_time != AV_NOPTS_VALUE ? stream_start_time : 0)) *
3041                 av_q2d(ic->streams[pkt->stream_index]->time_base) -
3042                 (double)(start_time != AV_NOPTS_VALUE ? start_time : 0) / 1000000
3043                 <= ((double)duration / 1000000);
3044         if (pkt->stream_index == is->audio_stream && pkt_in_play_range) {
3045             packet_queue_put(&is->audioq, pkt);
3046         } else if (pkt->stream_index == is->video_stream && pkt_in_play_range
3047                    && !(is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
3048             packet_queue_put(&is->videoq, pkt);
3049         } else if (pkt->stream_index == is->subtitle_stream && pkt_in_play_range) {
3050             packet_queue_put(&is->subtitleq, pkt);
3051         } else {
3052             av_packet_unref(pkt);
3053         }
3054     }
3055
3056     ret = 0;
3057  fail:
3058     if (ic && !is->ic)
3059         avformat_close_input(&ic);
3060
3061     if (ret != 0) {
3062         SDL_Event event;
3063
3064         event.type = FF_QUIT_EVENT;
3065         event.user.data1 = is;
3066         SDL_PushEvent(&event);
3067     }
3068     SDL_DestroyMutex(wait_mutex);
3069     return 0;
3070 }
3071
3072 static VideoState *stream_open(const char *filename, AVInputFormat *iformat)
3073 {
3074     VideoState *is;
3075
3076     is = av_mallocz(sizeof(VideoState));
3077     if (!is)
3078         return NULL;
3079     is->filename = av_strdup(filename);
3080     if (!is->filename)
3081         goto fail;
3082     is->iformat = iformat;
3083     is->ytop    = 0;
3084     is->xleft   = 0;
3085
3086     /* start video display */
3087     if (frame_queue_init(&is->pictq, &is->videoq, VIDEO_PICTURE_QUEUE_SIZE, 1) < 0)
3088         goto fail;
3089     if (frame_queue_init(&is->subpq, &is->subtitleq, SUBPICTURE_QUEUE_SIZE, 0) < 0)
3090         goto fail;
3091     if (frame_queue_init(&is->sampq, &is->audioq, SAMPLE_QUEUE_SIZE, 1) < 0)
3092         goto fail;
3093
3094     if (packet_queue_init(&is->videoq) < 0 ||
3095         packet_queue_init(&is->audioq) < 0 ||
3096         packet_queue_init(&is->subtitleq) < 0)
3097         goto fail;
3098
3099     if (!(is->continue_read_thread = SDL_CreateCond())) {
3100         av_log(NULL, AV_LOG_FATAL, "SDL_CreateCond(): %s\n", SDL_GetError());
3101         goto fail;
3102     }
3103
3104     init_clock(&is->vidclk, &is->videoq.serial);
3105     init_clock(&is->audclk, &is->audioq.serial);
3106     init_clock(&is->extclk, &is->extclk.serial);
3107     is->audio_clock_serial = -1;
3108     is->audio_volume = SDL_MIX_MAXVOLUME;
3109     is->muted = 0;
3110     is->av_sync_type = av_sync_type;
3111     is->read_tid     = SDL_CreateThread(read_thread, "read_thread", is);
3112     if (!is->read_tid) {
3113         av_log(NULL, AV_LOG_FATAL, "SDL_CreateThread(): %s\n", SDL_GetError());
3114 fail:
3115         stream_close(is);
3116         return NULL;
3117     }
3118     return is;
3119 }
3120
3121 static void stream_cycle_channel(VideoState *is, int codec_type)
3122 {
3123     AVFormatContext *ic = is->ic;
3124     int start_index, stream_index;
3125     int old_index;
3126     AVStream *st;
3127     AVProgram *p = NULL;
3128     int nb_streams = is->ic->nb_streams;
3129
3130     if (codec_type == AVMEDIA_TYPE_VIDEO) {
3131         start_index = is->last_video_stream;
3132         old_index = is->video_stream;
3133     } else if (codec_type == AVMEDIA_TYPE_AUDIO) {
3134         start_index = is->last_audio_stream;
3135         old_index = is->audio_stream;
3136     } else {
3137         start_index = is->last_subtitle_stream;
3138         old_index = is->subtitle_stream;
3139     }
3140     stream_index = start_index;
3141
3142     if (codec_type != AVMEDIA_TYPE_VIDEO && is->video_stream != -1) {
3143         p = av_find_program_from_stream(ic, NULL, is->video_stream);
3144         if (p) {
3145             nb_streams = p->nb_stream_indexes;
3146             for (start_index = 0; start_index < nb_streams; start_index++)
3147                 if (p->stream_index[start_index] == stream_index)
3148                     break;
3149             if (start_index == nb_streams)
3150                 start_index = -1;
3151             stream_index = start_index;
3152         }
3153     }
3154
3155     for (;;) {
3156         if (++stream_index >= nb_streams)
3157         {
3158             if (codec_type == AVMEDIA_TYPE_SUBTITLE)
3159             {
3160                 stream_index = -1;
3161                 is->last_subtitle_stream = -1;
3162                 goto the_end;
3163             }
3164             if (start_index == -1)
3165                 return;
3166             stream_index = 0;
3167         }
3168         if (stream_index == start_index)
3169             return;
3170         st = is->ic->streams[p ? p->stream_index[stream_index] : stream_index];
3171         if (st->codecpar->codec_type == codec_type) {
3172             /* check that parameters are OK */
3173             switch (codec_type) {
3174             case AVMEDIA_TYPE_AUDIO:
3175                 if (st->codecpar->sample_rate != 0 &&
3176                     st->codecpar->channels != 0)
3177                     goto the_end;
3178                 break;
3179             case AVMEDIA_TYPE_VIDEO:
3180             case AVMEDIA_TYPE_SUBTITLE:
3181                 goto the_end;
3182             default:
3183                 break;
3184             }
3185         }
3186     }
3187  the_end:
3188     if (p && stream_index != -1)
3189         stream_index = p->stream_index[stream_index];
3190     av_log(NULL, AV_LOG_INFO, "Switch %s stream from #%d to #%d\n",
3191            av_get_media_type_string(codec_type),
3192            old_index,
3193            stream_index);
3194
3195     stream_component_close(is, old_index);
3196     stream_component_open(is, stream_index);
3197 }
3198
3199
3200 static void toggle_full_screen(VideoState *is)
3201 {
3202     is_full_screen = !is_full_screen;
3203     SDL_SetWindowFullscreen(window, is_full_screen ? SDL_WINDOW_FULLSCREEN_DESKTOP : 0);
3204 }
3205
3206 static void toggle_audio_display(VideoState *is)
3207 {
3208     int next = is->show_mode;
3209     do {
3210         next = (next + 1) % SHOW_MODE_NB;
3211     } while (next != is->show_mode && (next == SHOW_MODE_VIDEO && !is->video_st || next != SHOW_MODE_VIDEO && !is->audio_st));
3212     if (is->show_mode != next) {
3213         is->force_refresh = 1;
3214         is->show_mode = next;
3215     }
3216 }
3217
3218 static void refresh_loop_wait_event(VideoState *is, SDL_Event *event) {
3219     double remaining_time = 0.0;
3220     SDL_PumpEvents();
3221     while (!SDL_PeepEvents(event, 1, SDL_GETEVENT, SDL_FIRSTEVENT, SDL_LASTEVENT)) {
3222         if (!cursor_hidden && av_gettime_relative() - cursor_last_shown > CURSOR_HIDE_DELAY) {
3223             SDL_ShowCursor(0);
3224             cursor_hidden = 1;
3225         }
3226         if (remaining_time > 0.0)
3227             av_usleep((int64_t)(remaining_time * 1000000.0));
3228         remaining_time = REFRESH_RATE;
3229         if (is->show_mode != SHOW_MODE_NONE && (!is->paused || is->force_refresh))
3230             video_refresh(is, &remaining_time);
3231         SDL_PumpEvents();
3232     }
3233 }
3234
3235 static void seek_chapter(VideoState *is, int incr)
3236 {
3237     int64_t pos = get_master_clock(is) * AV_TIME_BASE;
3238     int i;
3239
3240     if (!is->ic->nb_chapters)
3241         return;
3242
3243     /* find the current chapter */
3244     for (i = 0; i < is->ic->nb_chapters; i++) {
3245         AVChapter *ch = is->ic->chapters[i];
3246         if (av_compare_ts(pos, AV_TIME_BASE_Q, ch->start, ch->time_base) < 0) {
3247             i--;
3248             break;
3249         }
3250     }
3251
3252     i += incr;
3253     i = FFMAX(i, 0);
3254     if (i >= is->ic->nb_chapters)
3255         return;
3256
3257     av_log(NULL, AV_LOG_VERBOSE, "Seeking to chapter %d.\n", i);
3258     stream_seek(is, av_rescale_q(is->ic->chapters[i]->start, is->ic->chapters[i]->time_base,
3259                                  AV_TIME_BASE_Q), 0, 0);
3260 }
3261
3262 /* handle an event sent by the GUI */
3263 static void event_loop(VideoState *cur_stream)
3264 {
3265     SDL_Event event;
3266     double incr, pos, frac;
3267
3268     for (;;) {
3269         double x;
3270         refresh_loop_wait_event(cur_stream, &event);
3271         switch (event.type) {
3272         case SDL_KEYDOWN:
3273             if (exit_on_keydown) {
3274                 do_exit(cur_stream);
3275                 break;
3276             }
3277             switch (event.key.keysym.sym) {
3278             case SDLK_ESCAPE:
3279             case SDLK_q:
3280                 do_exit(cur_stream);
3281                 break;
3282             case SDLK_f:
3283                 toggle_full_screen(cur_stream);
3284                 cur_stream->force_refresh = 1;
3285                 break;
3286             case SDLK_p:
3287             case SDLK_SPACE:
3288                 toggle_pause(cur_stream);
3289                 break;
3290             case SDLK_m:
3291                 toggle_mute(cur_stream);
3292                 break;
3293             case SDLK_KP_MULTIPLY:
3294             case SDLK_0:
3295                 update_volume(cur_stream, 1, SDL_VOLUME_STEP);
3296                 break;
3297             case SDLK_KP_DIVIDE:
3298             case SDLK_9:
3299                 update_volume(cur_stream, -1, SDL_VOLUME_STEP);
3300                 break;
3301             case SDLK_s: // S: Step to next frame
3302                 step_to_next_frame(cur_stream);
3303                 break;
3304             case SDLK_a:
3305                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_AUDIO);
3306                 break;
3307             case SDLK_v:
3308                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_VIDEO);
3309                 break;
3310             case SDLK_c:
3311                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_VIDEO);
3312                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_AUDIO);
3313                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_SUBTITLE);
3314                 break;
3315             case SDLK_t:
3316                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_SUBTITLE);
3317                 break;
3318             case SDLK_w:
3319 #if CONFIG_AVFILTER
3320                 if (cur_stream->show_mode == SHOW_MODE_VIDEO && cur_stream->vfilter_idx < nb_vfilters - 1) {
3321                     if (++cur_stream->vfilter_idx >= nb_vfilters)
3322                         cur_stream->vfilter_idx = 0;
3323                 } else {
3324                     cur_stream->vfilter_idx = 0;
3325                     toggle_audio_display(cur_stream);
3326                 }
3327 #else
3328                 toggle_audio_display(cur_stream);
3329 #endif
3330                 break;
3331             case SDLK_PAGEUP:
3332                 if (cur_stream->ic->nb_chapters <= 1) {
3333                     incr = 600.0;
3334                     goto do_seek;
3335                 }
3336                 seek_chapter(cur_stream, 1);
3337                 break;
3338             case SDLK_PAGEDOWN:
3339                 if (cur_stream->ic->nb_chapters <= 1) {
3340                     incr = -600.0;
3341                     goto do_seek;
3342                 }
3343                 seek_chapter(cur_stream, -1);
3344                 break;
3345             case SDLK_LEFT:
3346                 incr = -10.0;
3347                 goto do_seek;
3348             case SDLK_RIGHT:
3349                 incr = 10.0;
3350                 goto do_seek;
3351             case SDLK_UP:
3352                 incr = 60.0;
3353                 goto do_seek;
3354             case SDLK_DOWN:
3355                 incr = -60.0;
3356             do_seek:
3357                     if (seek_by_bytes) {
3358                         pos = -1;
3359                         if (pos < 0 && cur_stream->video_stream >= 0)
3360                             pos = frame_queue_last_pos(&cur_stream->pictq);
3361                         if (pos < 0 && cur_stream->audio_stream >= 0)
3362                             pos = frame_queue_last_pos(&cur_stream->sampq);
3363                         if (pos < 0)
3364                             pos = avio_tell(cur_stream->ic->pb);
3365                         if (cur_stream->ic->bit_rate)
3366                             incr *= cur_stream->ic->bit_rate / 8.0;
3367                         else
3368                             incr *= 180000.0;
3369                         pos += incr;
3370                         stream_seek(cur_stream, pos, incr, 1);
3371                     } else {
3372                         pos = get_master_clock(cur_stream);
3373                         if (isnan(pos))
3374                             pos = (double)cur_stream->seek_pos / AV_TIME_BASE;
3375                         pos += incr;
3376                         if (cur_stream->ic->start_time != AV_NOPTS_VALUE && pos < cur_stream->ic->start_time / (double)AV_TIME_BASE)
3377                             pos = cur_stream->ic->start_time / (double)AV_TIME_BASE;
3378                         stream_seek(cur_stream, (int64_t)(pos * AV_TIME_BASE), (int64_t)(incr * AV_TIME_BASE), 0);
3379                     }
3380                 break;
3381             default:
3382                 break;
3383             }
3384             break;
3385         case SDL_MOUSEBUTTONDOWN:
3386             if (exit_on_mousedown) {
3387                 do_exit(cur_stream);
3388                 break;
3389             }
3390             if (event.button.button == SDL_BUTTON_LEFT) {
3391                 static int64_t last_mouse_left_click = 0;
3392                 if (av_gettime_relative() - last_mouse_left_click <= 500000) {
3393                     toggle_full_screen(cur_stream);
3394                     cur_stream->force_refresh = 1;
3395                     last_mouse_left_click = 0;
3396                 } else {
3397                     last_mouse_left_click = av_gettime_relative();
3398                 }
3399             }
3400         case SDL_MOUSEMOTION:
3401             if (cursor_hidden) {
3402                 SDL_ShowCursor(1);
3403                 cursor_hidden = 0;
3404             }
3405             cursor_last_shown = av_gettime_relative();
3406             if (event.type == SDL_MOUSEBUTTONDOWN) {
3407                 if (event.button.button != SDL_BUTTON_RIGHT)
3408                     break;
3409                 x = event.button.x;
3410             } else {
3411                 if (!(event.motion.state & SDL_BUTTON_RMASK))
3412                     break;
3413                 x = event.motion.x;
3414             }
3415                 if (seek_by_bytes || cur_stream->ic->duration <= 0) {
3416                     uint64_t size =  avio_size(cur_stream->ic->pb);
3417                     stream_seek(cur_stream, size*x/cur_stream->width, 0, 1);
3418                 } else {
3419                     int64_t ts;
3420                     int ns, hh, mm, ss;
3421                     int tns, thh, tmm, tss;
3422                     tns  = cur_stream->ic->duration / 1000000LL;
3423                     thh  = tns / 3600;
3424                     tmm  = (tns % 3600) / 60;
3425                     tss  = (tns % 60);
3426                     frac = x / cur_stream->width;
3427                     ns   = frac * tns;
3428                     hh   = ns / 3600;
3429                     mm   = (ns % 3600) / 60;
3430                     ss   = (ns % 60);
3431                     av_log(NULL, AV_LOG_INFO,
3432                            "Seek to %2.0f%% (%2d:%02d:%02d) of total duration (%2d:%02d:%02d)       \n", frac*100,
3433                             hh, mm, ss, thh, tmm, tss);
3434                     ts = frac * cur_stream->ic->duration;
3435                     if (cur_stream->ic->start_time != AV_NOPTS_VALUE)
3436                         ts += cur_stream->ic->start_time;
3437                     stream_seek(cur_stream, ts, 0, 0);
3438                 }
3439             break;
3440         case SDL_WINDOWEVENT:
3441             switch (event.window.event) {
3442                 case SDL_WINDOWEVENT_RESIZED:
3443                     screen_width  = cur_stream->width  = event.window.data1;
3444                     screen_height = cur_stream->height = event.window.data2;
3445                     if (cur_stream->vis_texture) {
3446                         SDL_DestroyTexture(cur_stream->vis_texture);
3447                         cur_stream->vis_texture = NULL;
3448                     }
3449                 case SDL_WINDOWEVENT_EXPOSED:
3450                     cur_stream->force_refresh = 1;
3451             }
3452           &nbs