lavfi: create Libav-API compatibility layer for avfilter_graph_parse() at the next...
[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 "libavutil/avstring.h"
32 #include "libavutil/colorspace.h"
33 #include "libavutil/mathematics.h"
34 #include "libavutil/pixdesc.h"
35 #include "libavutil/imgutils.h"
36 #include "libavutil/dict.h"
37 #include "libavutil/parseutils.h"
38 #include "libavutil/samplefmt.h"
39 #include "libavutil/avassert.h"
40 #include "libavutil/time.h"
41 #include "libavformat/avformat.h"
42 #include "libavdevice/avdevice.h"
43 #include "libswscale/swscale.h"
44 #include "libavutil/opt.h"
45 #include "libavcodec/avfft.h"
46 #include "libswresample/swresample.h"
47
48 #if CONFIG_AVFILTER
49 # include "libavfilter/avcodec.h"
50 # include "libavfilter/avfilter.h"
51 # include "libavfilter/buffersink.h"
52 # include "libavfilter/buffersrc.h"
53 #endif
54
55 #include <SDL.h>
56 #include <SDL_thread.h>
57
58 #include "cmdutils.h"
59
60 #include <assert.h>
61
62 const char program_name[] = "ffplay";
63 const int program_birth_year = 2003;
64
65 #define MAX_QUEUE_SIZE (15 * 1024 * 1024)
66 #define MIN_FRAMES 5
67
68 /* SDL audio buffer size, in samples. Should be small to have precise
69    A/V sync as SDL does not have hardware buffer fullness info. */
70 #define SDL_AUDIO_BUFFER_SIZE 1024
71
72 /* no AV sync correction is done if below the minimum AV sync threshold */
73 #define AV_SYNC_THRESHOLD_MIN 0.01
74 /* AV sync correction is done if above the maximum AV sync threshold */
75 #define AV_SYNC_THRESHOLD_MAX 0.1
76 /* If a frame duration is longer than this, it will not be duplicated to compensate AV sync */
77 #define AV_SYNC_FRAMEDUP_THRESHOLD 0.1
78 /* no AV correction is done if too big error */
79 #define AV_NOSYNC_THRESHOLD 10.0
80
81 /* maximum audio speed change to get correct sync */
82 #define SAMPLE_CORRECTION_PERCENT_MAX 10
83
84 /* external clock speed adjustment constants for realtime sources based on buffer fullness */
85 #define EXTERNAL_CLOCK_SPEED_MIN  0.900
86 #define EXTERNAL_CLOCK_SPEED_MAX  1.010
87 #define EXTERNAL_CLOCK_SPEED_STEP 0.001
88
89 /* we use about AUDIO_DIFF_AVG_NB A-V differences to make the average */
90 #define AUDIO_DIFF_AVG_NB   20
91
92 /* polls for possible required screen refresh at least this often, should be less than 1/fps */
93 #define REFRESH_RATE 0.01
94
95 /* NOTE: the size must be big enough to compensate the hardware audio buffersize size */
96 /* TODO: We assume that a decoded and resampled frame fits into this buffer */
97 #define SAMPLE_ARRAY_SIZE (8 * 65536)
98
99 #define CURSOR_HIDE_DELAY 1000000
100
101 static int64_t sws_flags = SWS_BICUBIC;
102
103 typedef struct MyAVPacketList {
104     AVPacket pkt;
105     struct MyAVPacketList *next;
106     int serial;
107 } MyAVPacketList;
108
109 typedef struct PacketQueue {
110     MyAVPacketList *first_pkt, *last_pkt;
111     int nb_packets;
112     int size;
113     int abort_request;
114     int serial;
115     SDL_mutex *mutex;
116     SDL_cond *cond;
117 } PacketQueue;
118
119 #define VIDEO_PICTURE_QUEUE_SIZE 3
120 #define SUBPICTURE_QUEUE_SIZE 4
121
122 typedef struct VideoPicture {
123     double pts;             // presentation timestamp for this picture
124     int64_t pos;            // byte position in file
125     SDL_Overlay *bmp;
126     int width, height; /* source height & width */
127     int allocated;
128     int reallocate;
129     int serial;
130
131     AVRational sar;
132 } VideoPicture;
133
134 typedef struct SubPicture {
135     double pts; /* presentation time stamp for this picture */
136     AVSubtitle sub;
137     int serial;
138 } SubPicture;
139
140 typedef struct AudioParams {
141     int freq;
142     int channels;
143     int64_t channel_layout;
144     enum AVSampleFormat fmt;
145 } AudioParams;
146
147 typedef struct Clock {
148     double pts;           /* clock base */
149     double pts_drift;     /* clock base minus time at which we updated the clock */
150     double last_updated;
151     double speed;
152     int serial;           /* clock is based on a packet with this serial */
153     int paused;
154     int *queue_serial;    /* pointer to the current packet queue serial, used for obsolete clock detection */
155 } Clock;
156
157 enum {
158     AV_SYNC_AUDIO_MASTER, /* default choice */
159     AV_SYNC_VIDEO_MASTER,
160     AV_SYNC_EXTERNAL_CLOCK, /* synchronize to an external clock */
161 };
162
163 typedef struct VideoState {
164     SDL_Thread *read_tid;
165     SDL_Thread *video_tid;
166     AVInputFormat *iformat;
167     int no_background;
168     int abort_request;
169     int force_refresh;
170     int paused;
171     int last_paused;
172     int queue_attachments_req;
173     int seek_req;
174     int seek_flags;
175     int64_t seek_pos;
176     int64_t seek_rel;
177     int read_pause_return;
178     AVFormatContext *ic;
179     int realtime;
180
181     Clock audclk;
182     Clock vidclk;
183     Clock extclk;
184
185     int audio_stream;
186
187     int av_sync_type;
188
189     double audio_clock;
190     int audio_clock_serial;
191     double audio_diff_cum; /* used for AV difference average computation */
192     double audio_diff_avg_coef;
193     double audio_diff_threshold;
194     int audio_diff_avg_count;
195     AVStream *audio_st;
196     PacketQueue audioq;
197     int audio_hw_buf_size;
198     uint8_t silence_buf[SDL_AUDIO_BUFFER_SIZE];
199     uint8_t *audio_buf;
200     uint8_t *audio_buf1;
201     unsigned int audio_buf_size; /* in bytes */
202     unsigned int audio_buf1_size;
203     int audio_buf_index; /* in bytes */
204     int audio_write_buf_size;
205     int audio_buf_frames_pending;
206     AVPacket audio_pkt_temp;
207     AVPacket audio_pkt;
208     int audio_pkt_temp_serial;
209     int audio_last_serial;
210     struct AudioParams audio_src;
211 #if CONFIG_AVFILTER
212     struct AudioParams audio_filter_src;
213 #endif
214     struct AudioParams audio_tgt;
215     struct SwrContext *swr_ctx;
216     int frame_drops_early;
217     int frame_drops_late;
218     AVFrame *frame;
219
220     enum ShowMode {
221         SHOW_MODE_NONE = -1, SHOW_MODE_VIDEO = 0, SHOW_MODE_WAVES, SHOW_MODE_RDFT, SHOW_MODE_NB
222     } show_mode;
223     int16_t sample_array[SAMPLE_ARRAY_SIZE];
224     int sample_array_index;
225     int last_i_start;
226     RDFTContext *rdft;
227     int rdft_bits;
228     FFTSample *rdft_data;
229     int xpos;
230     double last_vis_time;
231
232     SDL_Thread *subtitle_tid;
233     int subtitle_stream;
234     AVStream *subtitle_st;
235     PacketQueue subtitleq;
236     SubPicture subpq[SUBPICTURE_QUEUE_SIZE];
237     int subpq_size, subpq_rindex, subpq_windex;
238     SDL_mutex *subpq_mutex;
239     SDL_cond *subpq_cond;
240
241     double frame_timer;
242     double frame_last_pts;
243     double frame_last_duration;
244     double frame_last_dropped_pts;
245     double frame_last_returned_time;
246     double frame_last_filter_delay;
247     int64_t frame_last_dropped_pos;
248     int frame_last_dropped_serial;
249     int video_stream;
250     AVStream *video_st;
251     PacketQueue videoq;
252     int64_t video_current_pos;      // current displayed file pos
253     double max_frame_duration;      // maximum duration of a frame - above this, we consider the jump a timestamp discontinuity
254     VideoPicture pictq[VIDEO_PICTURE_QUEUE_SIZE];
255     int pictq_size, pictq_rindex, pictq_windex;
256     SDL_mutex *pictq_mutex;
257     SDL_cond *pictq_cond;
258 #if !CONFIG_AVFILTER
259     struct SwsContext *img_convert_ctx;
260 #endif
261     SDL_Rect last_display_rect;
262
263     char filename[1024];
264     int width, height, xleft, ytop;
265     int step;
266
267 #if CONFIG_AVFILTER
268     AVFilterContext *in_video_filter;   // the first filter in the video chain
269     AVFilterContext *out_video_filter;  // the last filter in the video chain
270     AVFilterContext *in_audio_filter;   // the first filter in the audio chain
271     AVFilterContext *out_audio_filter;  // the last filter in the audio chain
272     AVFilterGraph *agraph;              // audio filter graph
273 #endif
274
275     int last_video_stream, last_audio_stream, last_subtitle_stream;
276
277     SDL_cond *continue_read_thread;
278 } VideoState;
279
280 /* options specified by the user */
281 static AVInputFormat *file_iformat;
282 static const char *input_filename;
283 static const char *window_title;
284 static int fs_screen_width;
285 static int fs_screen_height;
286 static int default_width  = 640;
287 static int default_height = 480;
288 static int screen_width  = 0;
289 static int screen_height = 0;
290 static int audio_disable;
291 static int video_disable;
292 static int subtitle_disable;
293 static int wanted_stream[AVMEDIA_TYPE_NB] = {
294     [AVMEDIA_TYPE_AUDIO]    = -1,
295     [AVMEDIA_TYPE_VIDEO]    = -1,
296     [AVMEDIA_TYPE_SUBTITLE] = -1,
297 };
298 static int seek_by_bytes = -1;
299 static int display_disable;
300 static int show_status = 1;
301 static int av_sync_type = AV_SYNC_AUDIO_MASTER;
302 static int64_t start_time = AV_NOPTS_VALUE;
303 static int64_t duration = AV_NOPTS_VALUE;
304 static int workaround_bugs = 1;
305 static int fast = 0;
306 static int genpts = 0;
307 static int lowres = 0;
308 static int idct = FF_IDCT_AUTO;
309 static int error_concealment = 3;
310 static int decoder_reorder_pts = -1;
311 static int autoexit;
312 static int exit_on_keydown;
313 static int exit_on_mousedown;
314 static int loop = 1;
315 static int framedrop = -1;
316 static int infinite_buffer = -1;
317 static enum ShowMode show_mode = SHOW_MODE_NONE;
318 static const char *audio_codec_name;
319 static const char *subtitle_codec_name;
320 static const char *video_codec_name;
321 double rdftspeed = 0.02;
322 static int64_t cursor_last_shown;
323 static int cursor_hidden = 0;
324 #if CONFIG_AVFILTER
325 static char *vfilters = NULL;
326 static char *afilters = NULL;
327 #endif
328
329 /* current context */
330 static int is_full_screen;
331 static int64_t audio_callback_time;
332
333 static AVPacket flush_pkt;
334
335 #define FF_ALLOC_EVENT   (SDL_USEREVENT)
336 #define FF_QUIT_EVENT    (SDL_USEREVENT + 2)
337
338 static SDL_Surface *screen;
339
340 static inline
341 int cmp_audio_fmts(enum AVSampleFormat fmt1, int64_t channel_count1,
342                    enum AVSampleFormat fmt2, int64_t channel_count2)
343 {
344     /* If channel count == 1, planar and non-planar formats are the same */
345     if (channel_count1 == 1 && channel_count2 == 1)
346         return av_get_packed_sample_fmt(fmt1) != av_get_packed_sample_fmt(fmt2);
347     else
348         return channel_count1 != channel_count2 || fmt1 != fmt2;
349 }
350
351 static inline
352 int64_t get_valid_channel_layout(int64_t channel_layout, int channels)
353 {
354     if (channel_layout && av_get_channel_layout_nb_channels(channel_layout) == channels)
355         return channel_layout;
356     else
357         return 0;
358 }
359
360 static int packet_queue_put(PacketQueue *q, AVPacket *pkt);
361
362 static int packet_queue_put_private(PacketQueue *q, AVPacket *pkt)
363 {
364     MyAVPacketList *pkt1;
365
366     if (q->abort_request)
367        return -1;
368
369     pkt1 = av_malloc(sizeof(MyAVPacketList));
370     if (!pkt1)
371         return -1;
372     pkt1->pkt = *pkt;
373     pkt1->next = NULL;
374     if (pkt == &flush_pkt)
375         q->serial++;
376     pkt1->serial = q->serial;
377
378     if (!q->last_pkt)
379         q->first_pkt = pkt1;
380     else
381         q->last_pkt->next = pkt1;
382     q->last_pkt = pkt1;
383     q->nb_packets++;
384     q->size += pkt1->pkt.size + sizeof(*pkt1);
385     /* XXX: should duplicate packet data in DV case */
386     SDL_CondSignal(q->cond);
387     return 0;
388 }
389
390 static int packet_queue_put(PacketQueue *q, AVPacket *pkt)
391 {
392     int ret;
393
394     /* duplicate the packet */
395     if (pkt != &flush_pkt && av_dup_packet(pkt) < 0)
396         return -1;
397
398     SDL_LockMutex(q->mutex);
399     ret = packet_queue_put_private(q, pkt);
400     SDL_UnlockMutex(q->mutex);
401
402     if (pkt != &flush_pkt && ret < 0)
403         av_free_packet(pkt);
404
405     return ret;
406 }
407
408 /* packet queue handling */
409 static void packet_queue_init(PacketQueue *q)
410 {
411     memset(q, 0, sizeof(PacketQueue));
412     q->mutex = SDL_CreateMutex();
413     q->cond = SDL_CreateCond();
414     q->abort_request = 1;
415 }
416
417 static void packet_queue_flush(PacketQueue *q)
418 {
419     MyAVPacketList *pkt, *pkt1;
420
421     SDL_LockMutex(q->mutex);
422     for (pkt = q->first_pkt; pkt != NULL; pkt = pkt1) {
423         pkt1 = pkt->next;
424         av_free_packet(&pkt->pkt);
425         av_freep(&pkt);
426     }
427     q->last_pkt = NULL;
428     q->first_pkt = NULL;
429     q->nb_packets = 0;
430     q->size = 0;
431     SDL_UnlockMutex(q->mutex);
432 }
433
434 static void packet_queue_destroy(PacketQueue *q)
435 {
436     packet_queue_flush(q);
437     SDL_DestroyMutex(q->mutex);
438     SDL_DestroyCond(q->cond);
439 }
440
441 static void packet_queue_abort(PacketQueue *q)
442 {
443     SDL_LockMutex(q->mutex);
444
445     q->abort_request = 1;
446
447     SDL_CondSignal(q->cond);
448
449     SDL_UnlockMutex(q->mutex);
450 }
451
452 static void packet_queue_start(PacketQueue *q)
453 {
454     SDL_LockMutex(q->mutex);
455     q->abort_request = 0;
456     packet_queue_put_private(q, &flush_pkt);
457     SDL_UnlockMutex(q->mutex);
458 }
459
460 /* return < 0 if aborted, 0 if no packet and > 0 if packet.  */
461 static int packet_queue_get(PacketQueue *q, AVPacket *pkt, int block, int *serial)
462 {
463     MyAVPacketList *pkt1;
464     int ret;
465
466     SDL_LockMutex(q->mutex);
467
468     for (;;) {
469         if (q->abort_request) {
470             ret = -1;
471             break;
472         }
473
474         pkt1 = q->first_pkt;
475         if (pkt1) {
476             q->first_pkt = pkt1->next;
477             if (!q->first_pkt)
478                 q->last_pkt = NULL;
479             q->nb_packets--;
480             q->size -= pkt1->pkt.size + sizeof(*pkt1);
481             *pkt = pkt1->pkt;
482             if (serial)
483                 *serial = pkt1->serial;
484             av_free(pkt1);
485             ret = 1;
486             break;
487         } else if (!block) {
488             ret = 0;
489             break;
490         } else {
491             SDL_CondWait(q->cond, q->mutex);
492         }
493     }
494     SDL_UnlockMutex(q->mutex);
495     return ret;
496 }
497
498 static inline void fill_rectangle(SDL_Surface *screen,
499                                   int x, int y, int w, int h, int color, int update)
500 {
501     SDL_Rect rect;
502     rect.x = x;
503     rect.y = y;
504     rect.w = w;
505     rect.h = h;
506     SDL_FillRect(screen, &rect, color);
507     if (update && w > 0 && h > 0)
508         SDL_UpdateRect(screen, x, y, w, h);
509 }
510
511 /* draw only the border of a rectangle */
512 static void fill_border(int xleft, int ytop, int width, int height, int x, int y, int w, int h, int color, int update)
513 {
514     int w1, w2, h1, h2;
515
516     /* fill the background */
517     w1 = x;
518     if (w1 < 0)
519         w1 = 0;
520     w2 = width - (x + w);
521     if (w2 < 0)
522         w2 = 0;
523     h1 = y;
524     if (h1 < 0)
525         h1 = 0;
526     h2 = height - (y + h);
527     if (h2 < 0)
528         h2 = 0;
529     fill_rectangle(screen,
530                    xleft, ytop,
531                    w1, height,
532                    color, update);
533     fill_rectangle(screen,
534                    xleft + width - w2, ytop,
535                    w2, height,
536                    color, update);
537     fill_rectangle(screen,
538                    xleft + w1, ytop,
539                    width - w1 - w2, h1,
540                    color, update);
541     fill_rectangle(screen,
542                    xleft + w1, ytop + height - h2,
543                    width - w1 - w2, h2,
544                    color, update);
545 }
546
547 #define ALPHA_BLEND(a, oldp, newp, s)\
548 ((((oldp << s) * (255 - (a))) + (newp * (a))) / (255 << s))
549
550 #define RGBA_IN(r, g, b, a, s)\
551 {\
552     unsigned int v = ((const uint32_t *)(s))[0];\
553     a = (v >> 24) & 0xff;\
554     r = (v >> 16) & 0xff;\
555     g = (v >> 8) & 0xff;\
556     b = v & 0xff;\
557 }
558
559 #define YUVA_IN(y, u, v, a, s, pal)\
560 {\
561     unsigned int val = ((const uint32_t *)(pal))[*(const uint8_t*)(s)];\
562     a = (val >> 24) & 0xff;\
563     y = (val >> 16) & 0xff;\
564     u = (val >> 8) & 0xff;\
565     v = val & 0xff;\
566 }
567
568 #define YUVA_OUT(d, y, u, v, a)\
569 {\
570     ((uint32_t *)(d))[0] = (a << 24) | (y << 16) | (u << 8) | v;\
571 }
572
573
574 #define BPP 1
575
576 static void blend_subrect(AVPicture *dst, const AVSubtitleRect *rect, int imgw, int imgh)
577 {
578     int wrap, wrap3, width2, skip2;
579     int y, u, v, a, u1, v1, a1, w, h;
580     uint8_t *lum, *cb, *cr;
581     const uint8_t *p;
582     const uint32_t *pal;
583     int dstx, dsty, dstw, dsth;
584
585     dstw = av_clip(rect->w, 0, imgw);
586     dsth = av_clip(rect->h, 0, imgh);
587     dstx = av_clip(rect->x, 0, imgw - dstw);
588     dsty = av_clip(rect->y, 0, imgh - dsth);
589     lum = dst->data[0] + dsty * dst->linesize[0];
590     cb  = dst->data[1] + (dsty >> 1) * dst->linesize[1];
591     cr  = dst->data[2] + (dsty >> 1) * dst->linesize[2];
592
593     width2 = ((dstw + 1) >> 1) + (dstx & ~dstw & 1);
594     skip2 = dstx >> 1;
595     wrap = dst->linesize[0];
596     wrap3 = rect->pict.linesize[0];
597     p = rect->pict.data[0];
598     pal = (const uint32_t *)rect->pict.data[1];  /* Now in YCrCb! */
599
600     if (dsty & 1) {
601         lum += dstx;
602         cb += skip2;
603         cr += skip2;
604
605         if (dstx & 1) {
606             YUVA_IN(y, u, v, a, p, pal);
607             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
608             cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
609             cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
610             cb++;
611             cr++;
612             lum++;
613             p += BPP;
614         }
615         for (w = dstw - (dstx & 1); w >= 2; w -= 2) {
616             YUVA_IN(y, u, v, a, p, pal);
617             u1 = u;
618             v1 = v;
619             a1 = a;
620             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
621
622             YUVA_IN(y, u, v, a, p + BPP, pal);
623             u1 += u;
624             v1 += v;
625             a1 += a;
626             lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
627             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
628             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
629             cb++;
630             cr++;
631             p += 2 * BPP;
632             lum += 2;
633         }
634         if (w) {
635             YUVA_IN(y, u, v, a, p, pal);
636             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
637             cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
638             cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
639             p++;
640             lum++;
641         }
642         p += wrap3 - dstw * BPP;
643         lum += wrap - dstw - dstx;
644         cb += dst->linesize[1] - width2 - skip2;
645         cr += dst->linesize[2] - width2 - skip2;
646     }
647     for (h = dsth - (dsty & 1); h >= 2; h -= 2) {
648         lum += dstx;
649         cb += skip2;
650         cr += skip2;
651
652         if (dstx & 1) {
653             YUVA_IN(y, u, v, a, p, pal);
654             u1 = u;
655             v1 = v;
656             a1 = a;
657             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
658             p += wrap3;
659             lum += wrap;
660             YUVA_IN(y, u, v, a, p, pal);
661             u1 += u;
662             v1 += v;
663             a1 += a;
664             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
665             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
666             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
667             cb++;
668             cr++;
669             p += -wrap3 + BPP;
670             lum += -wrap + 1;
671         }
672         for (w = dstw - (dstx & 1); w >= 2; w -= 2) {
673             YUVA_IN(y, u, v, a, p, pal);
674             u1 = u;
675             v1 = v;
676             a1 = a;
677             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
678
679             YUVA_IN(y, u, v, a, p + BPP, pal);
680             u1 += u;
681             v1 += v;
682             a1 += a;
683             lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
684             p += wrap3;
685             lum += wrap;
686
687             YUVA_IN(y, u, v, a, p, pal);
688             u1 += u;
689             v1 += v;
690             a1 += a;
691             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
692
693             YUVA_IN(y, u, v, a, p + BPP, pal);
694             u1 += u;
695             v1 += v;
696             a1 += a;
697             lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
698
699             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 2);
700             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 2);
701
702             cb++;
703             cr++;
704             p += -wrap3 + 2 * BPP;
705             lum += -wrap + 2;
706         }
707         if (w) {
708             YUVA_IN(y, u, v, a, p, pal);
709             u1 = u;
710             v1 = v;
711             a1 = a;
712             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
713             p += wrap3;
714             lum += wrap;
715             YUVA_IN(y, u, v, a, p, pal);
716             u1 += u;
717             v1 += v;
718             a1 += a;
719             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
720             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
721             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
722             cb++;
723             cr++;
724             p += -wrap3 + BPP;
725             lum += -wrap + 1;
726         }
727         p += wrap3 + (wrap3 - dstw * BPP);
728         lum += wrap + (wrap - dstw - dstx);
729         cb += dst->linesize[1] - width2 - skip2;
730         cr += dst->linesize[2] - width2 - skip2;
731     }
732     /* handle odd height */
733     if (h) {
734         lum += dstx;
735         cb += skip2;
736         cr += skip2;
737
738         if (dstx & 1) {
739             YUVA_IN(y, u, v, a, p, pal);
740             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
741             cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
742             cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
743             cb++;
744             cr++;
745             lum++;
746             p += BPP;
747         }
748         for (w = dstw - (dstx & 1); w >= 2; w -= 2) {
749             YUVA_IN(y, u, v, a, p, pal);
750             u1 = u;
751             v1 = v;
752             a1 = a;
753             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
754
755             YUVA_IN(y, u, v, a, p + BPP, pal);
756             u1 += u;
757             v1 += v;
758             a1 += a;
759             lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
760             cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u, 1);
761             cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v, 1);
762             cb++;
763             cr++;
764             p += 2 * BPP;
765             lum += 2;
766         }
767         if (w) {
768             YUVA_IN(y, u, v, a, p, pal);
769             lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
770             cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
771             cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
772         }
773     }
774 }
775
776 static void free_subpicture(SubPicture *sp)
777 {
778     avsubtitle_free(&sp->sub);
779 }
780
781 static void calculate_display_rect(SDL_Rect *rect, int scr_xleft, int scr_ytop, int scr_width, int scr_height, VideoPicture *vp)
782 {
783     float aspect_ratio;
784     int width, height, x, y;
785
786     if (vp->sar.num == 0)
787         aspect_ratio = 0;
788     else
789         aspect_ratio = av_q2d(vp->sar);
790
791     if (aspect_ratio <= 0.0)
792         aspect_ratio = 1.0;
793     aspect_ratio *= (float)vp->width / (float)vp->height;
794
795     /* XXX: we suppose the screen has a 1.0 pixel ratio */
796     height = scr_height;
797     width = ((int)rint(height * aspect_ratio)) & ~1;
798     if (width > scr_width) {
799         width = scr_width;
800         height = ((int)rint(width / aspect_ratio)) & ~1;
801     }
802     x = (scr_width - width) / 2;
803     y = (scr_height - height) / 2;
804     rect->x = scr_xleft + x;
805     rect->y = scr_ytop  + y;
806     rect->w = FFMAX(width,  1);
807     rect->h = FFMAX(height, 1);
808 }
809
810 static void video_image_display(VideoState *is)
811 {
812     VideoPicture *vp;
813     SubPicture *sp;
814     AVPicture pict;
815     SDL_Rect rect;
816     int i;
817
818     vp = &is->pictq[is->pictq_rindex];
819     if (vp->bmp) {
820         if (is->subtitle_st) {
821             if (is->subpq_size > 0) {
822                 sp = &is->subpq[is->subpq_rindex];
823
824                 if (vp->pts >= sp->pts + ((float) sp->sub.start_display_time / 1000)) {
825                     SDL_LockYUVOverlay (vp->bmp);
826
827                     pict.data[0] = vp->bmp->pixels[0];
828                     pict.data[1] = vp->bmp->pixels[2];
829                     pict.data[2] = vp->bmp->pixels[1];
830
831                     pict.linesize[0] = vp->bmp->pitches[0];
832                     pict.linesize[1] = vp->bmp->pitches[2];
833                     pict.linesize[2] = vp->bmp->pitches[1];
834
835                     for (i = 0; i < sp->sub.num_rects; i++)
836                         blend_subrect(&pict, sp->sub.rects[i],
837                                       vp->bmp->w, vp->bmp->h);
838
839                     SDL_UnlockYUVOverlay (vp->bmp);
840                 }
841             }
842         }
843
844         calculate_display_rect(&rect, is->xleft, is->ytop, is->width, is->height, vp);
845
846         SDL_DisplayYUVOverlay(vp->bmp, &rect);
847
848         if (rect.x != is->last_display_rect.x || rect.y != is->last_display_rect.y || rect.w != is->last_display_rect.w || rect.h != is->last_display_rect.h || is->force_refresh) {
849             int bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
850             fill_border(is->xleft, is->ytop, is->width, is->height, rect.x, rect.y, rect.w, rect.h, bgcolor, 1);
851             is->last_display_rect = rect;
852         }
853     }
854 }
855
856 static inline int compute_mod(int a, int b)
857 {
858     return a < 0 ? a%b + b : a%b;
859 }
860
861 static void video_audio_display(VideoState *s)
862 {
863     int i, i_start, x, y1, y, ys, delay, n, nb_display_channels;
864     int ch, channels, h, h2, bgcolor, fgcolor;
865     int64_t time_diff;
866     int rdft_bits, nb_freq;
867
868     for (rdft_bits = 1; (1 << rdft_bits) < 2 * s->height; rdft_bits++)
869         ;
870     nb_freq = 1 << (rdft_bits - 1);
871
872     /* compute display index : center on currently output samples */
873     channels = s->audio_tgt.channels;
874     nb_display_channels = channels;
875     if (!s->paused) {
876         int data_used= s->show_mode == SHOW_MODE_WAVES ? s->width : (2*nb_freq);
877         n = 2 * channels;
878         delay = s->audio_write_buf_size;
879         delay /= n;
880
881         /* to be more precise, we take into account the time spent since
882            the last buffer computation */
883         if (audio_callback_time) {
884             time_diff = av_gettime() - audio_callback_time;
885             delay -= (time_diff * s->audio_tgt.freq) / 1000000;
886         }
887
888         delay += 2 * data_used;
889         if (delay < data_used)
890             delay = data_used;
891
892         i_start= x = compute_mod(s->sample_array_index - delay * channels, SAMPLE_ARRAY_SIZE);
893         if (s->show_mode == SHOW_MODE_WAVES) {
894             h = INT_MIN;
895             for (i = 0; i < 1000; i += channels) {
896                 int idx = (SAMPLE_ARRAY_SIZE + x - i) % SAMPLE_ARRAY_SIZE;
897                 int a = s->sample_array[idx];
898                 int b = s->sample_array[(idx + 4 * channels) % SAMPLE_ARRAY_SIZE];
899                 int c = s->sample_array[(idx + 5 * channels) % SAMPLE_ARRAY_SIZE];
900                 int d = s->sample_array[(idx + 9 * channels) % SAMPLE_ARRAY_SIZE];
901                 int score = a - d;
902                 if (h < score && (b ^ c) < 0) {
903                     h = score;
904                     i_start = idx;
905                 }
906             }
907         }
908
909         s->last_i_start = i_start;
910     } else {
911         i_start = s->last_i_start;
912     }
913
914     bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
915     if (s->show_mode == SHOW_MODE_WAVES) {
916         fill_rectangle(screen,
917                        s->xleft, s->ytop, s->width, s->height,
918                        bgcolor, 0);
919
920         fgcolor = SDL_MapRGB(screen->format, 0xff, 0xff, 0xff);
921
922         /* total height for one channel */
923         h = s->height / nb_display_channels;
924         /* graph height / 2 */
925         h2 = (h * 9) / 20;
926         for (ch = 0; ch < nb_display_channels; ch++) {
927             i = i_start + ch;
928             y1 = s->ytop + ch * h + (h / 2); /* position of center line */
929             for (x = 0; x < s->width; x++) {
930                 y = (s->sample_array[i] * h2) >> 15;
931                 if (y < 0) {
932                     y = -y;
933                     ys = y1 - y;
934                 } else {
935                     ys = y1;
936                 }
937                 fill_rectangle(screen,
938                                s->xleft + x, ys, 1, y,
939                                fgcolor, 0);
940                 i += channels;
941                 if (i >= SAMPLE_ARRAY_SIZE)
942                     i -= SAMPLE_ARRAY_SIZE;
943             }
944         }
945
946         fgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0xff);
947
948         for (ch = 1; ch < nb_display_channels; ch++) {
949             y = s->ytop + ch * h;
950             fill_rectangle(screen,
951                            s->xleft, y, s->width, 1,
952                            fgcolor, 0);
953         }
954         SDL_UpdateRect(screen, s->xleft, s->ytop, s->width, s->height);
955     } else {
956         nb_display_channels= FFMIN(nb_display_channels, 2);
957         if (rdft_bits != s->rdft_bits) {
958             av_rdft_end(s->rdft);
959             av_free(s->rdft_data);
960             s->rdft = av_rdft_init(rdft_bits, DFT_R2C);
961             s->rdft_bits = rdft_bits;
962             s->rdft_data = av_malloc(4 * nb_freq * sizeof(*s->rdft_data));
963         }
964         {
965             FFTSample *data[2];
966             for (ch = 0; ch < nb_display_channels; ch++) {
967                 data[ch] = s->rdft_data + 2 * nb_freq * ch;
968                 i = i_start + ch;
969                 for (x = 0; x < 2 * nb_freq; x++) {
970                     double w = (x-nb_freq) * (1.0 / nb_freq);
971                     data[ch][x] = s->sample_array[i] * (1.0 - w * w);
972                     i += channels;
973                     if (i >= SAMPLE_ARRAY_SIZE)
974                         i -= SAMPLE_ARRAY_SIZE;
975                 }
976                 av_rdft_calc(s->rdft, data[ch]);
977             }
978             // least efficient way to do this, we should of course directly access it but its more than fast enough
979             for (y = 0; y < s->height; y++) {
980                 double w = 1 / sqrt(nb_freq);
981                 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]));
982                 int b = (nb_display_channels == 2 ) ? sqrt(w * sqrt(data[1][2 * y + 0] * data[1][2 * y + 0]
983                        + data[1][2 * y + 1] * data[1][2 * y + 1])) : a;
984                 a = FFMIN(a, 255);
985                 b = FFMIN(b, 255);
986                 fgcolor = SDL_MapRGB(screen->format, a, b, (a + b) / 2);
987
988                 fill_rectangle(screen,
989                             s->xpos, s->height-y, 1, 1,
990                             fgcolor, 0);
991             }
992         }
993         SDL_UpdateRect(screen, s->xpos, s->ytop, 1, s->height);
994         if (!s->paused)
995             s->xpos++;
996         if (s->xpos >= s->width)
997             s->xpos= s->xleft;
998     }
999 }
1000
1001 static void stream_close(VideoState *is)
1002 {
1003     VideoPicture *vp;
1004     int i;
1005     /* XXX: use a special url_shutdown call to abort parse cleanly */
1006     is->abort_request = 1;
1007     SDL_WaitThread(is->read_tid, NULL);
1008     packet_queue_destroy(&is->videoq);
1009     packet_queue_destroy(&is->audioq);
1010     packet_queue_destroy(&is->subtitleq);
1011
1012     /* free all pictures */
1013     for (i = 0; i < VIDEO_PICTURE_QUEUE_SIZE; i++) {
1014         vp = &is->pictq[i];
1015         if (vp->bmp) {
1016             SDL_FreeYUVOverlay(vp->bmp);
1017             vp->bmp = NULL;
1018         }
1019     }
1020     SDL_DestroyMutex(is->pictq_mutex);
1021     SDL_DestroyCond(is->pictq_cond);
1022     SDL_DestroyMutex(is->subpq_mutex);
1023     SDL_DestroyCond(is->subpq_cond);
1024     SDL_DestroyCond(is->continue_read_thread);
1025 #if !CONFIG_AVFILTER
1026     sws_freeContext(is->img_convert_ctx);
1027 #endif
1028     av_free(is);
1029 }
1030
1031 static void do_exit(VideoState *is)
1032 {
1033     if (is) {
1034         stream_close(is);
1035     }
1036     av_lockmgr_register(NULL);
1037     uninit_opts();
1038 #if CONFIG_AVFILTER
1039     av_freep(&vfilters);
1040 #endif
1041     avformat_network_deinit();
1042     if (show_status)
1043         printf("\n");
1044     SDL_Quit();
1045     av_log(NULL, AV_LOG_QUIET, "%s", "");
1046     exit(0);
1047 }
1048
1049 static void sigterm_handler(int sig)
1050 {
1051     exit(123);
1052 }
1053
1054 static int video_open(VideoState *is, int force_set_video_mode, VideoPicture *vp)
1055 {
1056     int flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL;
1057     int w,h;
1058     SDL_Rect rect;
1059
1060     if (is_full_screen) flags |= SDL_FULLSCREEN;
1061     else                flags |= SDL_RESIZABLE;
1062
1063     if (vp && vp->width) {
1064         calculate_display_rect(&rect, 0, 0, INT_MAX, vp->height, vp);
1065         default_width  = rect.w;
1066         default_height = rect.h;
1067     }
1068
1069     if (is_full_screen && fs_screen_width) {
1070         w = fs_screen_width;
1071         h = fs_screen_height;
1072     } else if (!is_full_screen && screen_width) {
1073         w = screen_width;
1074         h = screen_height;
1075     } else {
1076         w = default_width;
1077         h = default_height;
1078     }
1079     w = FFMIN(16383, w);
1080     if (screen && is->width == screen->w && screen->w == w
1081        && is->height== screen->h && screen->h == h && !force_set_video_mode)
1082         return 0;
1083     screen = SDL_SetVideoMode(w, h, 0, flags);
1084     if (!screen) {
1085         av_log(NULL, AV_LOG_FATAL, "SDL: could not set video mode - exiting\n");
1086         do_exit(is);
1087     }
1088     if (!window_title)
1089         window_title = input_filename;
1090     SDL_WM_SetCaption(window_title, window_title);
1091
1092     is->width  = screen->w;
1093     is->height = screen->h;
1094
1095     return 0;
1096 }
1097
1098 /* display the current picture, if any */
1099 static void video_display(VideoState *is)
1100 {
1101     if (!screen)
1102         video_open(is, 0, NULL);
1103     if (is->audio_st && is->show_mode != SHOW_MODE_VIDEO)
1104         video_audio_display(is);
1105     else if (is->video_st)
1106         video_image_display(is);
1107 }
1108
1109 static double get_clock(Clock *c)
1110 {
1111     if (*c->queue_serial != c->serial)
1112         return NAN;
1113     if (c->paused) {
1114         return c->pts;
1115     } else {
1116         double time = av_gettime() / 1000000.0;
1117         return c->pts_drift + time - (time - c->last_updated) * (1.0 - c->speed);
1118     }
1119 }
1120
1121 static void set_clock_at(Clock *c, double pts, int serial, double time)
1122 {
1123     c->pts = pts;
1124     c->last_updated = time;
1125     c->pts_drift = c->pts - time;
1126     c->serial = serial;
1127 }
1128
1129 static void set_clock(Clock *c, double pts, int serial)
1130 {
1131     double time = av_gettime() / 1000000.0;
1132     set_clock_at(c, pts, serial, time);
1133 }
1134
1135 static void set_clock_speed(Clock *c, double speed)
1136 {
1137     set_clock(c, get_clock(c), c->serial);
1138     c->speed = speed;
1139 }
1140
1141 static void init_clock(Clock *c, int *queue_serial)
1142 {
1143     c->speed = 1.0;
1144     c->paused = 0;
1145     c->queue_serial = queue_serial;
1146     set_clock(c, NAN, -1);
1147 }
1148
1149 static void sync_clock_to_slave(Clock *c, Clock *slave)
1150 {
1151     double clock = get_clock(c);
1152     double slave_clock = get_clock(slave);
1153     if (!isnan(slave_clock) && (isnan(clock) || fabs(clock - slave_clock) > AV_NOSYNC_THRESHOLD))
1154         set_clock(c, slave_clock, slave->serial);
1155 }
1156
1157 static int get_master_sync_type(VideoState *is) {
1158     if (is->av_sync_type == AV_SYNC_VIDEO_MASTER) {
1159         if (is->video_st)
1160             return AV_SYNC_VIDEO_MASTER;
1161         else
1162             return AV_SYNC_AUDIO_MASTER;
1163     } else if (is->av_sync_type == AV_SYNC_AUDIO_MASTER) {
1164         if (is->audio_st)
1165             return AV_SYNC_AUDIO_MASTER;
1166         else
1167             return AV_SYNC_EXTERNAL_CLOCK;
1168     } else {
1169         return AV_SYNC_EXTERNAL_CLOCK;
1170     }
1171 }
1172
1173 /* get the current master clock value */
1174 static double get_master_clock(VideoState *is)
1175 {
1176     double val;
1177
1178     switch (get_master_sync_type(is)) {
1179         case AV_SYNC_VIDEO_MASTER:
1180             val = get_clock(&is->vidclk);
1181             break;
1182         case AV_SYNC_AUDIO_MASTER:
1183             val = get_clock(&is->audclk);
1184             break;
1185         default:
1186             val = get_clock(&is->extclk);
1187             break;
1188     }
1189     return val;
1190 }
1191
1192 static void check_external_clock_speed(VideoState *is) {
1193    if (is->video_stream >= 0 && is->videoq.nb_packets <= MIN_FRAMES / 2 ||
1194        is->audio_stream >= 0 && is->audioq.nb_packets <= MIN_FRAMES / 2) {
1195        set_clock_speed(&is->extclk, FFMAX(EXTERNAL_CLOCK_SPEED_MIN, is->extclk.speed - EXTERNAL_CLOCK_SPEED_STEP));
1196    } else if ((is->video_stream < 0 || is->videoq.nb_packets > MIN_FRAMES * 2) &&
1197               (is->audio_stream < 0 || is->audioq.nb_packets > MIN_FRAMES * 2)) {
1198        set_clock_speed(&is->extclk, FFMIN(EXTERNAL_CLOCK_SPEED_MAX, is->extclk.speed + EXTERNAL_CLOCK_SPEED_STEP));
1199    } else {
1200        double speed = is->extclk.speed;
1201        if (speed != 1.0)
1202            set_clock_speed(&is->extclk, speed + EXTERNAL_CLOCK_SPEED_STEP * (1.0 - speed) / fabs(1.0 - speed));
1203    }
1204 }
1205
1206 /* seek in the stream */
1207 static void stream_seek(VideoState *is, int64_t pos, int64_t rel, int seek_by_bytes)
1208 {
1209     if (!is->seek_req) {
1210         is->seek_pos = pos;
1211         is->seek_rel = rel;
1212         is->seek_flags &= ~AVSEEK_FLAG_BYTE;
1213         if (seek_by_bytes)
1214             is->seek_flags |= AVSEEK_FLAG_BYTE;
1215         is->seek_req = 1;
1216         SDL_CondSignal(is->continue_read_thread);
1217     }
1218 }
1219
1220 /* pause or resume the video */
1221 static void stream_toggle_pause(VideoState *is)
1222 {
1223     if (is->paused) {
1224         is->frame_timer += av_gettime() / 1000000.0 + is->vidclk.pts_drift - is->vidclk.pts;
1225         if (is->read_pause_return != AVERROR(ENOSYS)) {
1226             is->vidclk.paused = 0;
1227         }
1228         set_clock(&is->vidclk, get_clock(&is->vidclk), is->vidclk.serial);
1229     }
1230     set_clock(&is->extclk, get_clock(&is->extclk), is->extclk.serial);
1231     is->paused = is->audclk.paused = is->vidclk.paused = is->extclk.paused = !is->paused;
1232 }
1233
1234 static void toggle_pause(VideoState *is)
1235 {
1236     stream_toggle_pause(is);
1237     is->step = 0;
1238 }
1239
1240 static void step_to_next_frame(VideoState *is)
1241 {
1242     /* if the stream is paused unpause it, then step */
1243     if (is->paused)
1244         stream_toggle_pause(is);
1245     is->step = 1;
1246 }
1247
1248 static double compute_target_delay(double delay, VideoState *is)
1249 {
1250     double sync_threshold, diff;
1251
1252     /* update delay to follow master synchronisation source */
1253     if (get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER) {
1254         /* if video is slave, we try to correct big delays by
1255            duplicating or deleting a frame */
1256         diff = get_clock(&is->vidclk) - get_master_clock(is);
1257
1258         /* skip or repeat frame. We take into account the
1259            delay to compute the threshold. I still don't know
1260            if it is the best guess */
1261         sync_threshold = FFMAX(AV_SYNC_THRESHOLD_MIN, FFMIN(AV_SYNC_THRESHOLD_MAX, delay));
1262         if (!isnan(diff) && fabs(diff) < is->max_frame_duration) {
1263             if (diff <= -sync_threshold)
1264                 delay = FFMAX(0, delay + diff);
1265             else if (diff >= sync_threshold && delay > AV_SYNC_FRAMEDUP_THRESHOLD)
1266                 delay = delay + diff;
1267             else if (diff >= sync_threshold)
1268                 delay = 2 * delay;
1269         }
1270     }
1271
1272     av_dlog(NULL, "video: delay=%0.3f A-V=%f\n",
1273             delay, -diff);
1274
1275     return delay;
1276 }
1277
1278 static void pictq_next_picture(VideoState *is) {
1279     /* update queue size and signal for next picture */
1280     if (++is->pictq_rindex == VIDEO_PICTURE_QUEUE_SIZE)
1281         is->pictq_rindex = 0;
1282
1283     SDL_LockMutex(is->pictq_mutex);
1284     is->pictq_size--;
1285     SDL_CondSignal(is->pictq_cond);
1286     SDL_UnlockMutex(is->pictq_mutex);
1287 }
1288
1289 static int pictq_prev_picture(VideoState *is) {
1290     VideoPicture *prevvp;
1291     int ret = 0;
1292     /* update queue size and signal for the previous picture */
1293     prevvp = &is->pictq[(is->pictq_rindex + VIDEO_PICTURE_QUEUE_SIZE - 1) % VIDEO_PICTURE_QUEUE_SIZE];
1294     if (prevvp->allocated && prevvp->serial == is->videoq.serial) {
1295         SDL_LockMutex(is->pictq_mutex);
1296         if (is->pictq_size < VIDEO_PICTURE_QUEUE_SIZE) {
1297             if (--is->pictq_rindex == -1)
1298                 is->pictq_rindex = VIDEO_PICTURE_QUEUE_SIZE - 1;
1299             is->pictq_size++;
1300             ret = 1;
1301         }
1302         SDL_CondSignal(is->pictq_cond);
1303         SDL_UnlockMutex(is->pictq_mutex);
1304     }
1305     return ret;
1306 }
1307
1308 static void update_video_pts(VideoState *is, double pts, int64_t pos, int serial) {
1309     /* update current video pts */
1310     set_clock(&is->vidclk, pts, serial);
1311     sync_clock_to_slave(&is->extclk, &is->vidclk);
1312     is->video_current_pos = pos;
1313     is->frame_last_pts = pts;
1314 }
1315
1316 /* called to display each frame */
1317 static void video_refresh(void *opaque, double *remaining_time)
1318 {
1319     VideoState *is = opaque;
1320     VideoPicture *vp;
1321     double time;
1322
1323     SubPicture *sp, *sp2;
1324
1325     if (!is->paused && get_master_sync_type(is) == AV_SYNC_EXTERNAL_CLOCK && is->realtime)
1326         check_external_clock_speed(is);
1327
1328     if (!display_disable && is->show_mode != SHOW_MODE_VIDEO && is->audio_st) {
1329         time = av_gettime() / 1000000.0;
1330         if (is->force_refresh || is->last_vis_time + rdftspeed < time) {
1331             video_display(is);
1332             is->last_vis_time = time;
1333         }
1334         *remaining_time = FFMIN(*remaining_time, is->last_vis_time + rdftspeed - time);
1335     }
1336
1337     if (is->video_st) {
1338         int redisplay = 0;
1339         if (is->force_refresh)
1340             redisplay = pictq_prev_picture(is);
1341 retry:
1342         if (is->pictq_size == 0) {
1343             SDL_LockMutex(is->pictq_mutex);
1344             if (is->frame_last_dropped_pts != AV_NOPTS_VALUE && is->frame_last_dropped_pts > is->frame_last_pts) {
1345                 update_video_pts(is, is->frame_last_dropped_pts, is->frame_last_dropped_pos, is->frame_last_dropped_serial);
1346                 is->frame_last_dropped_pts = AV_NOPTS_VALUE;
1347             }
1348             SDL_UnlockMutex(is->pictq_mutex);
1349             // nothing to do, no picture to display in the queue
1350         } else {
1351             double last_duration, duration, delay;
1352             /* dequeue the picture */
1353             vp = &is->pictq[is->pictq_rindex];
1354
1355             if (vp->serial != is->videoq.serial) {
1356                 pictq_next_picture(is);
1357                 redisplay = 0;
1358                 goto retry;
1359             }
1360
1361             if (is->paused)
1362                 goto display;
1363
1364             /* compute nominal last_duration */
1365             last_duration = vp->pts - is->frame_last_pts;
1366             if (!isnan(last_duration) && last_duration > 0 && last_duration < is->max_frame_duration) {
1367                 /* if duration of the last frame was sane, update last_duration in video state */
1368                 is->frame_last_duration = last_duration;
1369             }
1370             if (redisplay)
1371                 delay = 0.0;
1372             else
1373                 delay = compute_target_delay(is->frame_last_duration, is);
1374
1375             time= av_gettime()/1000000.0;
1376             if (time < is->frame_timer + delay && !redisplay) {
1377                 *remaining_time = FFMIN(is->frame_timer + delay - time, *remaining_time);
1378                 return;
1379             }
1380
1381             is->frame_timer += delay;
1382             if (delay > 0 && time - is->frame_timer > AV_SYNC_THRESHOLD_MAX)
1383                 is->frame_timer = time;
1384
1385             SDL_LockMutex(is->pictq_mutex);
1386             if (!redisplay && !isnan(vp->pts))
1387                 update_video_pts(is, vp->pts, vp->pos, vp->serial);
1388             SDL_UnlockMutex(is->pictq_mutex);
1389
1390             if (is->pictq_size > 1) {
1391                 VideoPicture *nextvp = &is->pictq[(is->pictq_rindex + 1) % VIDEO_PICTURE_QUEUE_SIZE];
1392                 duration = nextvp->pts - vp->pts;
1393                 if(!is->step && (redisplay || framedrop>0 || (framedrop && get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER)) && time > is->frame_timer + duration){
1394                     if (!redisplay)
1395                         is->frame_drops_late++;
1396                     pictq_next_picture(is);
1397                     redisplay = 0;
1398                     goto retry;
1399                 }
1400             }
1401
1402             if (is->subtitle_st) {
1403                     while (is->subpq_size > 0) {
1404                         sp = &is->subpq[is->subpq_rindex];
1405
1406                         if (is->subpq_size > 1)
1407                             sp2 = &is->subpq[(is->subpq_rindex + 1) % SUBPICTURE_QUEUE_SIZE];
1408                         else
1409                             sp2 = NULL;
1410
1411                         if (sp->serial != is->subtitleq.serial
1412                                 || (is->vidclk.pts > (sp->pts + ((float) sp->sub.end_display_time / 1000)))
1413                                 || (sp2 && is->vidclk.pts > (sp2->pts + ((float) sp2->sub.start_display_time / 1000))))
1414                         {
1415                             free_subpicture(sp);
1416
1417                             /* update queue size and signal for next picture */
1418                             if (++is->subpq_rindex == SUBPICTURE_QUEUE_SIZE)
1419                                 is->subpq_rindex = 0;
1420
1421                             SDL_LockMutex(is->subpq_mutex);
1422                             is->subpq_size--;
1423                             SDL_CondSignal(is->subpq_cond);
1424                             SDL_UnlockMutex(is->subpq_mutex);
1425                         } else {
1426                             break;
1427                         }
1428                     }
1429             }
1430
1431 display:
1432             /* display picture */
1433             if (!display_disable && is->show_mode == SHOW_MODE_VIDEO)
1434                 video_display(is);
1435
1436             pictq_next_picture(is);
1437
1438             if (is->step && !is->paused)
1439                 stream_toggle_pause(is);
1440         }
1441     }
1442     is->force_refresh = 0;
1443     if (show_status) {
1444         static int64_t last_time;
1445         int64_t cur_time;
1446         int aqsize, vqsize, sqsize;
1447         double av_diff;
1448
1449         cur_time = av_gettime();
1450         if (!last_time || (cur_time - last_time) >= 30000) {
1451             aqsize = 0;
1452             vqsize = 0;
1453             sqsize = 0;
1454             if (is->audio_st)
1455                 aqsize = is->audioq.size;
1456             if (is->video_st)
1457                 vqsize = is->videoq.size;
1458             if (is->subtitle_st)
1459                 sqsize = is->subtitleq.size;
1460             av_diff = 0;
1461             if (is->audio_st && is->video_st)
1462                 av_diff = get_clock(&is->audclk) - get_clock(&is->vidclk);
1463             else if (is->video_st)
1464                 av_diff = get_master_clock(is) - get_clock(&is->vidclk);
1465             else if (is->audio_st)
1466                 av_diff = get_master_clock(is) - get_clock(&is->audclk);
1467             av_log(NULL, AV_LOG_INFO,
1468                    "%7.2f %s:%7.3f fd=%4d aq=%5dKB vq=%5dKB sq=%5dB f=%"PRId64"/%"PRId64"   \r",
1469                    get_master_clock(is),
1470                    (is->audio_st && is->video_st) ? "A-V" : (is->video_st ? "M-V" : (is->audio_st ? "M-A" : "   ")),
1471                    av_diff,
1472                    is->frame_drops_early + is->frame_drops_late,
1473                    aqsize / 1024,
1474                    vqsize / 1024,
1475                    sqsize,
1476                    is->video_st ? is->video_st->codec->pts_correction_num_faulty_dts : 0,
1477                    is->video_st ? is->video_st->codec->pts_correction_num_faulty_pts : 0);
1478             fflush(stdout);
1479             last_time = cur_time;
1480         }
1481     }
1482 }
1483
1484 /* allocate a picture (needs to do that in main thread to avoid
1485    potential locking problems */
1486 static void alloc_picture(VideoState *is)
1487 {
1488     VideoPicture *vp;
1489     int64_t bufferdiff;
1490
1491     vp = &is->pictq[is->pictq_windex];
1492
1493     if (vp->bmp)
1494         SDL_FreeYUVOverlay(vp->bmp);
1495
1496     video_open(is, 0, vp);
1497
1498     vp->bmp = SDL_CreateYUVOverlay(vp->width, vp->height,
1499                                    SDL_YV12_OVERLAY,
1500                                    screen);
1501     bufferdiff = vp->bmp ? FFMAX(vp->bmp->pixels[0], vp->bmp->pixels[1]) - FFMIN(vp->bmp->pixels[0], vp->bmp->pixels[1]) : 0;
1502     if (!vp->bmp || vp->bmp->pitches[0] < vp->width || bufferdiff < (int64_t)vp->height * vp->bmp->pitches[0]) {
1503         /* SDL allocates a buffer smaller than requested if the video
1504          * overlay hardware is unable to support the requested size. */
1505         av_log(NULL, AV_LOG_FATAL,
1506                "Error: the video system does not support an image\n"
1507                         "size of %dx%d pixels. Try using -lowres or -vf \"scale=w:h\"\n"
1508                         "to reduce the image size.\n", vp->width, vp->height );
1509         do_exit(is);
1510     }
1511
1512     SDL_LockMutex(is->pictq_mutex);
1513     vp->allocated = 1;
1514     SDL_CondSignal(is->pictq_cond);
1515     SDL_UnlockMutex(is->pictq_mutex);
1516 }
1517
1518 static void duplicate_right_border_pixels(SDL_Overlay *bmp) {
1519     int i, width, height;
1520     Uint8 *p, *maxp;
1521     for (i = 0; i < 3; i++) {
1522         width  = bmp->w;
1523         height = bmp->h;
1524         if (i > 0) {
1525             width  >>= 1;
1526             height >>= 1;
1527         }
1528         if (bmp->pitches[i] > width) {
1529             maxp = bmp->pixels[i] + bmp->pitches[i] * height - 1;
1530             for (p = bmp->pixels[i] + width - 1; p < maxp; p += bmp->pitches[i])
1531                 *(p+1) = *p;
1532         }
1533     }
1534 }
1535
1536 static int queue_picture(VideoState *is, AVFrame *src_frame, double pts, int64_t pos, int serial)
1537 {
1538     VideoPicture *vp;
1539
1540 #if defined(DEBUG_SYNC) && 0
1541     printf("frame_type=%c pts=%0.3f\n",
1542            av_get_picture_type_char(src_frame->pict_type), pts);
1543 #endif
1544
1545     /* wait until we have space to put a new picture */
1546     SDL_LockMutex(is->pictq_mutex);
1547
1548     /* keep the last already displayed picture in the queue */
1549     while (is->pictq_size >= VIDEO_PICTURE_QUEUE_SIZE - 1 &&
1550            !is->videoq.abort_request) {
1551         SDL_CondWait(is->pictq_cond, is->pictq_mutex);
1552     }
1553     SDL_UnlockMutex(is->pictq_mutex);
1554
1555     if (is->videoq.abort_request)
1556         return -1;
1557
1558     vp = &is->pictq[is->pictq_windex];
1559
1560     vp->sar = src_frame->sample_aspect_ratio;
1561
1562     /* alloc or resize hardware picture buffer */
1563     if (!vp->bmp || vp->reallocate || !vp->allocated ||
1564         vp->width  != src_frame->width ||
1565         vp->height != src_frame->height) {
1566         SDL_Event event;
1567
1568         vp->allocated  = 0;
1569         vp->reallocate = 0;
1570         vp->width = src_frame->width;
1571         vp->height = src_frame->height;
1572
1573         /* the allocation must be done in the main thread to avoid
1574            locking problems. */
1575         event.type = FF_ALLOC_EVENT;
1576         event.user.data1 = is;
1577         SDL_PushEvent(&event);
1578
1579         /* wait until the picture is allocated */
1580         SDL_LockMutex(is->pictq_mutex);
1581         while (!vp->allocated && !is->videoq.abort_request) {
1582             SDL_CondWait(is->pictq_cond, is->pictq_mutex);
1583         }
1584         /* if the queue is aborted, we have to pop the pending ALLOC event or wait for the allocation to complete */
1585         if (is->videoq.abort_request && SDL_PeepEvents(&event, 1, SDL_GETEVENT, SDL_EVENTMASK(FF_ALLOC_EVENT)) != 1) {
1586             while (!vp->allocated) {
1587                 SDL_CondWait(is->pictq_cond, is->pictq_mutex);
1588             }
1589         }
1590         SDL_UnlockMutex(is->pictq_mutex);
1591
1592         if (is->videoq.abort_request)
1593             return -1;
1594     }
1595
1596     /* if the frame is not skipped, then display it */
1597     if (vp->bmp) {
1598         AVPicture pict = { { 0 } };
1599
1600         /* get a pointer on the bitmap */
1601         SDL_LockYUVOverlay (vp->bmp);
1602
1603         pict.data[0] = vp->bmp->pixels[0];
1604         pict.data[1] = vp->bmp->pixels[2];
1605         pict.data[2] = vp->bmp->pixels[1];
1606
1607         pict.linesize[0] = vp->bmp->pitches[0];
1608         pict.linesize[1] = vp->bmp->pitches[2];
1609         pict.linesize[2] = vp->bmp->pitches[1];
1610
1611 #if CONFIG_AVFILTER
1612         // FIXME use direct rendering
1613         av_picture_copy(&pict, (AVPicture *)src_frame,
1614                         src_frame->format, vp->width, vp->height);
1615 #else
1616         av_opt_get_int(sws_opts, "sws_flags", 0, &sws_flags);
1617         is->img_convert_ctx = sws_getCachedContext(is->img_convert_ctx,
1618             vp->width, vp->height, src_frame->format, vp->width, vp->height,
1619             AV_PIX_FMT_YUV420P, sws_flags, NULL, NULL, NULL);
1620         if (is->img_convert_ctx == NULL) {
1621             av_log(NULL, AV_LOG_FATAL, "Cannot initialize the conversion context\n");
1622             exit(1);
1623         }
1624         sws_scale(is->img_convert_ctx, src_frame->data, src_frame->linesize,
1625                   0, vp->height, pict.data, pict.linesize);
1626 #endif
1627         /* workaround SDL PITCH_WORKAROUND */
1628         duplicate_right_border_pixels(vp->bmp);
1629         /* update the bitmap content */
1630         SDL_UnlockYUVOverlay(vp->bmp);
1631
1632         vp->pts = pts;
1633         vp->pos = pos;
1634         vp->serial = serial;
1635
1636         /* now we can update the picture count */
1637         if (++is->pictq_windex == VIDEO_PICTURE_QUEUE_SIZE)
1638             is->pictq_windex = 0;
1639         SDL_LockMutex(is->pictq_mutex);
1640         is->pictq_size++;
1641         SDL_UnlockMutex(is->pictq_mutex);
1642     }
1643     return 0;
1644 }
1645
1646 static int get_video_frame(VideoState *is, AVFrame *frame, AVPacket *pkt, int *serial)
1647 {
1648     int got_picture;
1649
1650     if (packet_queue_get(&is->videoq, pkt, 1, serial) < 0)
1651         return -1;
1652
1653     if (pkt->data == flush_pkt.data) {
1654         avcodec_flush_buffers(is->video_st->codec);
1655
1656         SDL_LockMutex(is->pictq_mutex);
1657         // Make sure there are no long delay timers (ideally we should just flush the queue but that's harder)
1658         while (is->pictq_size && !is->videoq.abort_request) {
1659             SDL_CondWait(is->pictq_cond, is->pictq_mutex);
1660         }
1661         is->video_current_pos = -1;
1662         is->frame_last_pts = AV_NOPTS_VALUE;
1663         is->frame_last_duration = 0;
1664         is->frame_timer = (double)av_gettime() / 1000000.0;
1665         is->frame_last_dropped_pts = AV_NOPTS_VALUE;
1666         SDL_UnlockMutex(is->pictq_mutex);
1667         return 0;
1668     }
1669
1670     if(avcodec_decode_video2(is->video_st->codec, frame, &got_picture, pkt) < 0)
1671         return 0;
1672
1673     if (got_picture) {
1674         int ret = 1;
1675         double dpts = NAN;
1676
1677         if (decoder_reorder_pts == -1) {
1678             frame->pts = av_frame_get_best_effort_timestamp(frame);
1679         } else if (decoder_reorder_pts) {
1680             frame->pts = frame->pkt_pts;
1681         } else {
1682             frame->pts = frame->pkt_dts;
1683         }
1684
1685         if (frame->pts != AV_NOPTS_VALUE)
1686             dpts = av_q2d(is->video_st->time_base) * frame->pts;
1687
1688         frame->sample_aspect_ratio = av_guess_sample_aspect_ratio(is->ic, is->video_st, frame);
1689
1690         if (framedrop>0 || (framedrop && get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER)) {
1691             SDL_LockMutex(is->pictq_mutex);
1692             if (is->frame_last_pts != AV_NOPTS_VALUE && frame->pts != AV_NOPTS_VALUE) {
1693                 double clockdiff = get_clock(&is->vidclk) - get_master_clock(is);
1694                 double ptsdiff = dpts - is->frame_last_pts;
1695                 if (!isnan(clockdiff) && fabs(clockdiff) < AV_NOSYNC_THRESHOLD &&
1696                     !isnan(ptsdiff) && ptsdiff > 0 && ptsdiff < AV_NOSYNC_THRESHOLD &&
1697                     clockdiff + ptsdiff - is->frame_last_filter_delay < 0 &&
1698                     is->videoq.nb_packets) {
1699                     is->frame_last_dropped_pos = pkt->pos;
1700                     is->frame_last_dropped_pts = dpts;
1701                     is->frame_last_dropped_serial = *serial;
1702                     is->frame_drops_early++;
1703                     av_frame_unref(frame);
1704                     ret = 0;
1705                 }
1706             }
1707             SDL_UnlockMutex(is->pictq_mutex);
1708         }
1709
1710         return ret;
1711     }
1712     return 0;
1713 }
1714
1715 #if CONFIG_AVFILTER
1716 static int configure_filtergraph(AVFilterGraph *graph, const char *filtergraph,
1717                                  AVFilterContext *source_ctx, AVFilterContext *sink_ctx)
1718 {
1719     int ret;
1720     AVFilterInOut *outputs = NULL, *inputs = NULL;
1721
1722     if (filtergraph) {
1723         outputs = avfilter_inout_alloc();
1724         inputs  = avfilter_inout_alloc();
1725         if (!outputs || !inputs) {
1726             ret = AVERROR(ENOMEM);
1727             goto fail;
1728         }
1729
1730         outputs->name       = av_strdup("in");
1731         outputs->filter_ctx = source_ctx;
1732         outputs->pad_idx    = 0;
1733         outputs->next       = NULL;
1734
1735         inputs->name        = av_strdup("out");
1736         inputs->filter_ctx  = sink_ctx;
1737         inputs->pad_idx     = 0;
1738         inputs->next        = NULL;
1739
1740         if ((ret = avfilter_graph_parse_ptr(graph, filtergraph, &inputs, &outputs, NULL)) < 0)
1741             goto fail;
1742     } else {
1743         if ((ret = avfilter_link(source_ctx, 0, sink_ctx, 0)) < 0)
1744             goto fail;
1745     }
1746
1747     ret = avfilter_graph_config(graph, NULL);
1748 fail:
1749     avfilter_inout_free(&outputs);
1750     avfilter_inout_free(&inputs);
1751     return ret;
1752 }
1753
1754 static int configure_video_filters(AVFilterGraph *graph, VideoState *is, const char *vfilters, AVFrame *frame)
1755 {
1756     static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE };
1757     char sws_flags_str[128];
1758     char buffersrc_args[256];
1759     int ret;
1760     AVFilterContext *filt_src = NULL, *filt_out = NULL, *filt_crop;
1761     AVCodecContext *codec = is->video_st->codec;
1762     AVRational fr = av_guess_frame_rate(is->ic, is->video_st, NULL);
1763
1764     av_opt_get_int(sws_opts, "sws_flags", 0, &sws_flags);
1765     snprintf(sws_flags_str, sizeof(sws_flags_str), "flags=%"PRId64, sws_flags);
1766     graph->scale_sws_opts = av_strdup(sws_flags_str);
1767
1768     snprintf(buffersrc_args, sizeof(buffersrc_args),
1769              "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d",
1770              frame->width, frame->height, frame->format,
1771              is->video_st->time_base.num, is->video_st->time_base.den,
1772              codec->sample_aspect_ratio.num, FFMAX(codec->sample_aspect_ratio.den, 1));
1773     if (fr.num && fr.den)
1774         av_strlcatf(buffersrc_args, sizeof(buffersrc_args), ":frame_rate=%d/%d", fr.num, fr.den);
1775
1776     if ((ret = avfilter_graph_create_filter(&filt_src,
1777                                             avfilter_get_by_name("buffer"),
1778                                             "ffplay_buffer", buffersrc_args, NULL,
1779                                             graph)) < 0)
1780         goto fail;
1781
1782     ret = avfilter_graph_create_filter(&filt_out,
1783                                        avfilter_get_by_name("buffersink"),
1784                                        "ffplay_buffersink", NULL, NULL, graph);
1785     if (ret < 0)
1786         goto fail;
1787
1788     if ((ret = av_opt_set_int_list(filt_out, "pix_fmts", pix_fmts,  AV_PIX_FMT_NONE, AV_OPT_SEARCH_CHILDREN)) < 0)
1789         goto fail;
1790
1791     /* SDL YUV code is not handling odd width/height for some driver
1792      * combinations, therefore we crop the picture to an even width/height. */
1793     if ((ret = avfilter_graph_create_filter(&filt_crop,
1794                                             avfilter_get_by_name("crop"),
1795                                             "ffplay_crop", "floor(in_w/2)*2:floor(in_h/2)*2", NULL, graph)) < 0)
1796         goto fail;
1797     if ((ret = avfilter_link(filt_crop, 0, filt_out, 0)) < 0)
1798         goto fail;
1799
1800     if ((ret = configure_filtergraph(graph, vfilters, filt_src, filt_crop)) < 0)
1801         goto fail;
1802
1803     is->in_video_filter  = filt_src;
1804     is->out_video_filter = filt_out;
1805
1806 fail:
1807     return ret;
1808 }
1809
1810 static int configure_audio_filters(VideoState *is, const char *afilters, int force_output_format)
1811 {
1812     static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE };
1813     int sample_rates[2] = { 0, -1 };
1814     int64_t channel_layouts[2] = { 0, -1 };
1815     int channels[2] = { 0, -1 };
1816     AVFilterContext *filt_asrc = NULL, *filt_asink = NULL;
1817     char asrc_args[256];
1818     int ret;
1819
1820     avfilter_graph_free(&is->agraph);
1821     if (!(is->agraph = avfilter_graph_alloc()))
1822         return AVERROR(ENOMEM);
1823
1824     ret = snprintf(asrc_args, sizeof(asrc_args),
1825                    "sample_rate=%d:sample_fmt=%s:channels=%d:time_base=%d/%d",
1826                    is->audio_filter_src.freq, av_get_sample_fmt_name(is->audio_filter_src.fmt),
1827                    is->audio_filter_src.channels,
1828                    1, is->audio_filter_src.freq);
1829     if (is->audio_filter_src.channel_layout)
1830         snprintf(asrc_args + ret, sizeof(asrc_args) - ret,
1831                  ":channel_layout=0x%"PRIx64,  is->audio_filter_src.channel_layout);
1832
1833     ret = avfilter_graph_create_filter(&filt_asrc,
1834                                        avfilter_get_by_name("abuffer"), "ffplay_abuffer",
1835                                        asrc_args, NULL, is->agraph);
1836     if (ret < 0)
1837         goto end;
1838
1839
1840     ret = avfilter_graph_create_filter(&filt_asink,
1841                                        avfilter_get_by_name("abuffersink"), "ffplay_abuffersink",
1842                                        NULL, NULL, is->agraph);
1843     if (ret < 0)
1844         goto end;
1845
1846     if ((ret = av_opt_set_int_list(filt_asink, "sample_fmts", sample_fmts,  AV_SAMPLE_FMT_NONE, AV_OPT_SEARCH_CHILDREN)) < 0)
1847         goto end;
1848     if ((ret = av_opt_set_int(filt_asink, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
1849         goto end;
1850
1851     if (force_output_format) {
1852         channel_layouts[0] = is->audio_tgt.channel_layout;
1853         channels       [0] = is->audio_tgt.channels;
1854         sample_rates   [0] = is->audio_tgt.freq;
1855         if ((ret = av_opt_set_int(filt_asink, "all_channel_counts", 0, AV_OPT_SEARCH_CHILDREN)) < 0)
1856             goto end;
1857         if ((ret = av_opt_set_int_list(filt_asink, "channel_layouts", channel_layouts,  -1, AV_OPT_SEARCH_CHILDREN)) < 0)
1858             goto end;
1859         if ((ret = av_opt_set_int_list(filt_asink, "channel_counts" , channels       ,  -1, AV_OPT_SEARCH_CHILDREN)) < 0)
1860             goto end;
1861         if ((ret = av_opt_set_int_list(filt_asink, "sample_rates"   , sample_rates   ,  -1, AV_OPT_SEARCH_CHILDREN)) < 0)
1862             goto end;
1863     }
1864
1865
1866     if ((ret = configure_filtergraph(is->agraph, afilters, filt_asrc, filt_asink)) < 0)
1867         goto end;
1868
1869     is->in_audio_filter  = filt_asrc;
1870     is->out_audio_filter = filt_asink;
1871
1872 end:
1873     if (ret < 0)
1874         avfilter_graph_free(&is->agraph);
1875     return ret;
1876 }
1877 #endif  /* CONFIG_AVFILTER */
1878
1879 static int video_thread(void *arg)
1880 {
1881     AVPacket pkt = { 0 };
1882     VideoState *is = arg;
1883     AVFrame *frame = av_frame_alloc();
1884     double pts;
1885     int ret;
1886     int serial = 0;
1887
1888 #if CONFIG_AVFILTER
1889     AVFilterGraph *graph = avfilter_graph_alloc();
1890     AVFilterContext *filt_out = NULL, *filt_in = NULL;
1891     int last_w = 0;
1892     int last_h = 0;
1893     enum AVPixelFormat last_format = -2;
1894     int last_serial = -1;
1895 #endif
1896
1897     for (;;) {
1898         while (is->paused && !is->videoq.abort_request)
1899             SDL_Delay(10);
1900
1901         avcodec_get_frame_defaults(frame);
1902         av_free_packet(&pkt);
1903
1904         ret = get_video_frame(is, frame, &pkt, &serial);
1905         if (ret < 0)
1906             goto the_end;
1907         if (!ret)
1908             continue;
1909
1910 #if CONFIG_AVFILTER
1911         if (   last_w != frame->width
1912             || last_h != frame->height
1913             || last_format != frame->format
1914             || last_serial != serial) {
1915             av_log(NULL, AV_LOG_DEBUG,
1916                    "Video frame changed from size:%dx%d format:%s serial:%d to size:%dx%d format:%s serial:%d\n",
1917                    last_w, last_h,
1918                    (const char *)av_x_if_null(av_get_pix_fmt_name(last_format), "none"), last_serial,
1919                    frame->width, frame->height,
1920                    (const char *)av_x_if_null(av_get_pix_fmt_name(frame->format), "none"), serial);
1921             avfilter_graph_free(&graph);
1922             graph = avfilter_graph_alloc();
1923             if ((ret = configure_video_filters(graph, is, vfilters, frame)) < 0) {
1924                 SDL_Event event;
1925                 event.type = FF_QUIT_EVENT;
1926                 event.user.data1 = is;
1927                 SDL_PushEvent(&event);
1928                 av_free_packet(&pkt);
1929                 goto the_end;
1930             }
1931             filt_in  = is->in_video_filter;
1932             filt_out = is->out_video_filter;
1933             last_w = frame->width;
1934             last_h = frame->height;
1935             last_format = frame->format;
1936             last_serial = serial;
1937         }
1938
1939         ret = av_buffersrc_add_frame(filt_in, frame);
1940         if (ret < 0)
1941             goto the_end;
1942         av_frame_unref(frame);
1943         avcodec_get_frame_defaults(frame);
1944         av_free_packet(&pkt);
1945
1946         while (ret >= 0) {
1947             is->frame_last_returned_time = av_gettime() / 1000000.0;
1948
1949             ret = av_buffersink_get_frame_flags(filt_out, frame, 0);
1950             if (ret < 0) {
1951                 ret = 0;
1952                 break;
1953             }
1954
1955             is->frame_last_filter_delay = av_gettime() / 1000000.0 - is->frame_last_returned_time;
1956             if (fabs(is->frame_last_filter_delay) > AV_NOSYNC_THRESHOLD / 10.0)
1957                 is->frame_last_filter_delay = 0;
1958
1959             pts = (frame->pts == AV_NOPTS_VALUE) ? NAN : frame->pts * av_q2d(filt_out->inputs[0]->time_base);
1960             ret = queue_picture(is, frame, pts, av_frame_get_pkt_pos(frame), serial);
1961             av_frame_unref(frame);
1962         }
1963 #else
1964         pts = (frame->pts == AV_NOPTS_VALUE) ? NAN : frame->pts * av_q2d(is->video_st->time_base);
1965         ret = queue_picture(is, frame, pts, pkt.pos, serial);
1966         av_frame_unref(frame);
1967 #endif
1968
1969         if (ret < 0)
1970             goto the_end;
1971     }
1972  the_end:
1973     avcodec_flush_buffers(is->video_st->codec);
1974 #if CONFIG_AVFILTER
1975     avfilter_graph_free(&graph);
1976 #endif
1977     av_free_packet(&pkt);
1978     av_frame_free(&frame);
1979     return 0;
1980 }
1981
1982 static int subtitle_thread(void *arg)
1983 {
1984     VideoState *is = arg;
1985     SubPicture *sp;
1986     AVPacket pkt1, *pkt = &pkt1;
1987     int got_subtitle;
1988     int serial;
1989     double pts;
1990     int i, j;
1991     int r, g, b, y, u, v, a;
1992
1993     for (;;) {
1994         while (is->paused && !is->subtitleq.abort_request) {
1995             SDL_Delay(10);
1996         }
1997         if (packet_queue_get(&is->subtitleq, pkt, 1, &serial) < 0)
1998             break;
1999
2000         if (pkt->data == flush_pkt.data) {
2001             avcodec_flush_buffers(is->subtitle_st->codec);
2002             continue;
2003         }
2004         SDL_LockMutex(is->subpq_mutex);
2005         while (is->subpq_size >= SUBPICTURE_QUEUE_SIZE &&
2006                !is->subtitleq.abort_request) {
2007             SDL_CondWait(is->subpq_cond, is->subpq_mutex);
2008         }
2009         SDL_UnlockMutex(is->subpq_mutex);
2010
2011         if (is->subtitleq.abort_request)
2012             return 0;
2013
2014         sp = &is->subpq[is->subpq_windex];
2015
2016        /* NOTE: ipts is the PTS of the _first_ picture beginning in
2017            this packet, if any */
2018         pts = 0;
2019         if (pkt->pts != AV_NOPTS_VALUE)
2020             pts = av_q2d(is->subtitle_st->time_base) * pkt->pts;
2021
2022         avcodec_decode_subtitle2(is->subtitle_st->codec, &sp->sub,
2023                                  &got_subtitle, pkt);
2024         if (got_subtitle && sp->sub.format == 0) {
2025             if (sp->sub.pts != AV_NOPTS_VALUE)
2026                 pts = sp->sub.pts / (double)AV_TIME_BASE;
2027             sp->pts = pts;
2028             sp->serial = serial;
2029
2030             for (i = 0; i < sp->sub.num_rects; i++)
2031             {
2032                 for (j = 0; j < sp->sub.rects[i]->nb_colors; j++)
2033                 {
2034                     RGBA_IN(r, g, b, a, (uint32_t*)sp->sub.rects[i]->pict.data[1] + j);
2035                     y = RGB_TO_Y_CCIR(r, g, b);
2036                     u = RGB_TO_U_CCIR(r, g, b, 0);
2037                     v = RGB_TO_V_CCIR(r, g, b, 0);
2038                     YUVA_OUT((uint32_t*)sp->sub.rects[i]->pict.data[1] + j, y, u, v, a);
2039                 }
2040             }
2041
2042             /* now we can update the picture count */
2043             if (++is->subpq_windex == SUBPICTURE_QUEUE_SIZE)
2044                 is->subpq_windex = 0;
2045             SDL_LockMutex(is->subpq_mutex);
2046             is->subpq_size++;
2047             SDL_UnlockMutex(is->subpq_mutex);
2048         }
2049         av_free_packet(pkt);
2050     }
2051     return 0;
2052 }
2053
2054 /* copy samples for viewing in editor window */
2055 static void update_sample_display(VideoState *is, short *samples, int samples_size)
2056 {
2057     int size, len;
2058
2059     size = samples_size / sizeof(short);
2060     while (size > 0) {
2061         len = SAMPLE_ARRAY_SIZE - is->sample_array_index;
2062         if (len > size)
2063             len = size;
2064         memcpy(is->sample_array + is->sample_array_index, samples, len * sizeof(short));
2065         samples += len;
2066         is->sample_array_index += len;
2067         if (is->sample_array_index >= SAMPLE_ARRAY_SIZE)
2068             is->sample_array_index = 0;
2069         size -= len;
2070     }
2071 }
2072
2073 /* return the wanted number of samples to get better sync if sync_type is video
2074  * or external master clock */
2075 static int synchronize_audio(VideoState *is, int nb_samples)
2076 {
2077     int wanted_nb_samples = nb_samples;
2078
2079     /* if not master, then we try to remove or add samples to correct the clock */
2080     if (get_master_sync_type(is) != AV_SYNC_AUDIO_MASTER) {
2081         double diff, avg_diff;
2082         int min_nb_samples, max_nb_samples;
2083
2084         diff = get_clock(&is->audclk) - get_master_clock(is);
2085
2086         if (!isnan(diff) && fabs(diff) < AV_NOSYNC_THRESHOLD) {
2087             is->audio_diff_cum = diff + is->audio_diff_avg_coef * is->audio_diff_cum;
2088             if (is->audio_diff_avg_count < AUDIO_DIFF_AVG_NB) {
2089                 /* not enough measures to have a correct estimate */
2090                 is->audio_diff_avg_count++;
2091             } else {
2092                 /* estimate the A-V difference */
2093                 avg_diff = is->audio_diff_cum * (1.0 - is->audio_diff_avg_coef);
2094
2095                 if (fabs(avg_diff) >= is->audio_diff_threshold) {
2096                     wanted_nb_samples = nb_samples + (int)(diff * is->audio_src.freq);
2097                     min_nb_samples = ((nb_samples * (100 - SAMPLE_CORRECTION_PERCENT_MAX) / 100));
2098                     max_nb_samples = ((nb_samples * (100 + SAMPLE_CORRECTION_PERCENT_MAX) / 100));
2099                     wanted_nb_samples = FFMIN(FFMAX(wanted_nb_samples, min_nb_samples), max_nb_samples);
2100                 }
2101                 av_dlog(NULL, "diff=%f adiff=%f sample_diff=%d apts=%0.3f %f\n",
2102                         diff, avg_diff, wanted_nb_samples - nb_samples,
2103                         is->audio_clock, is->audio_diff_threshold);
2104             }
2105         } else {
2106             /* too big difference : may be initial PTS errors, so
2107                reset A-V filter */
2108             is->audio_diff_avg_count = 0;
2109             is->audio_diff_cum       = 0;
2110         }
2111     }
2112
2113     return wanted_nb_samples;
2114 }
2115
2116 /**
2117  * Decode one audio frame and return its uncompressed size.
2118  *
2119  * The processed audio frame is decoded, converted if required, and
2120  * stored in is->audio_buf, with size in bytes given by the return
2121  * value.
2122  */
2123 static int audio_decode_frame(VideoState *is)
2124 {
2125     AVPacket *pkt_temp = &is->audio_pkt_temp;
2126     AVPacket *pkt = &is->audio_pkt;
2127     AVCodecContext *dec = is->audio_st->codec;
2128     int len1, data_size, resampled_data_size;
2129     int64_t dec_channel_layout;
2130     int got_frame;
2131     av_unused double audio_clock0;
2132     int new_packet = 0;
2133     int flush_complete = 0;
2134     int wanted_nb_samples;
2135     AVRational tb;
2136     int ret;
2137     int reconfigure;
2138
2139     for (;;) {
2140         /* NOTE: the audio packet can contain several frames */
2141         while (pkt_temp->size > 0 || (!pkt_temp->data && new_packet) || is->audio_buf_frames_pending) {
2142             if (!is->frame) {
2143                 if (!(is->frame = avcodec_alloc_frame()))
2144                     return AVERROR(ENOMEM);
2145             } else {
2146                 av_frame_unref(is->frame);
2147                 avcodec_get_frame_defaults(is->frame);
2148             }
2149
2150             if (is->audioq.serial != is->audio_pkt_temp_serial)
2151                 break;
2152
2153             if (is->paused)
2154                 return -1;
2155
2156             if (!is->audio_buf_frames_pending) {
2157                 if (flush_complete)
2158                     break;
2159                 new_packet = 0;
2160                 len1 = avcodec_decode_audio4(dec, is->frame, &got_frame, pkt_temp);
2161                 if (len1 < 0) {
2162                     /* if error, we skip the frame */
2163                     pkt_temp->size = 0;
2164                     break;
2165                 }
2166
2167                 pkt_temp->data += len1;
2168                 pkt_temp->size -= len1;
2169
2170                 if (!got_frame) {
2171                     /* stop sending empty packets if the decoder is finished */
2172                     if (!pkt_temp->data && dec->codec->capabilities & CODEC_CAP_DELAY)
2173                         flush_complete = 1;
2174                     continue;
2175                 }
2176
2177                 tb = (AVRational){1, is->frame->sample_rate};
2178                 if (is->frame->pts != AV_NOPTS_VALUE)
2179                     is->frame->pts = av_rescale_q(is->frame->pts, dec->time_base, tb);
2180                 else if (is->frame->pkt_pts != AV_NOPTS_VALUE)
2181                     is->frame->pts = av_rescale_q(is->frame->pkt_pts, is->audio_st->time_base, tb);
2182                 if (pkt_temp->pts != AV_NOPTS_VALUE)
2183                     pkt_temp->pts += (double) is->frame->nb_samples / is->frame->sample_rate / av_q2d(is->audio_st->time_base);
2184
2185 #if CONFIG_AVFILTER
2186                 dec_channel_layout = get_valid_channel_layout(is->frame->channel_layout, av_frame_get_channels(is->frame));
2187
2188                 reconfigure =
2189                     cmp_audio_fmts(is->audio_filter_src.fmt, is->audio_filter_src.channels,
2190                                    is->frame->format, av_frame_get_channels(is->frame))    ||
2191                     is->audio_filter_src.channel_layout != dec_channel_layout ||
2192                     is->audio_filter_src.freq           != is->frame->sample_rate ||
2193                     is->audio_pkt_temp_serial           != is->audio_last_serial;
2194
2195                 if (reconfigure) {
2196                     char buf1[1024], buf2[1024];
2197                     av_get_channel_layout_string(buf1, sizeof(buf1), -1, is->audio_filter_src.channel_layout);
2198                     av_get_channel_layout_string(buf2, sizeof(buf2), -1, dec_channel_layout);
2199                     av_log(NULL, AV_LOG_DEBUG,
2200                            "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",
2201                            is->audio_filter_src.freq, is->audio_filter_src.channels, av_get_sample_fmt_name(is->audio_filter_src.fmt), buf1, is->audio_last_serial,
2202                            is->frame->sample_rate, av_frame_get_channels(is->frame), av_get_sample_fmt_name(is->frame->format), buf2, is->audio_pkt_temp_serial);
2203
2204                     is->audio_filter_src.fmt            = is->frame->format;
2205                     is->audio_filter_src.channels       = av_frame_get_channels(is->frame);
2206                     is->audio_filter_src.channel_layout = dec_channel_layout;
2207                     is->audio_filter_src.freq           = is->frame->sample_rate;
2208                     is->audio_last_serial               = is->audio_pkt_temp_serial;
2209
2210                     if ((ret = configure_audio_filters(is, afilters, 1)) < 0)
2211                         return ret;
2212                 }
2213
2214                 if ((ret = av_buffersrc_add_frame(is->in_audio_filter, is->frame)) < 0)
2215                     return ret;
2216                 av_frame_unref(is->frame);
2217 #endif
2218             }
2219 #if CONFIG_AVFILTER
2220             if ((ret = av_buffersink_get_frame_flags(is->out_audio_filter, is->frame, 0)) < 0) {
2221                 if (ret == AVERROR(EAGAIN)) {
2222                     is->audio_buf_frames_pending = 0;
2223                     continue;
2224                 }
2225                 return ret;
2226             }
2227             is->audio_buf_frames_pending = 1;
2228             tb = is->out_audio_filter->inputs[0]->time_base;
2229 #endif
2230
2231             data_size = av_samples_get_buffer_size(NULL, av_frame_get_channels(is->frame),
2232                                                    is->frame->nb_samples,
2233                                                    is->frame->format, 1);
2234
2235             dec_channel_layout =
2236                 (is->frame->channel_layout && av_frame_get_channels(is->frame) == av_get_channel_layout_nb_channels(is->frame->channel_layout)) ?
2237                 is->frame->channel_layout : av_get_default_channel_layout(av_frame_get_channels(is->frame));
2238             wanted_nb_samples = synchronize_audio(is, is->frame->nb_samples);
2239
2240             if (is->frame->format        != is->audio_src.fmt            ||
2241                 dec_channel_layout       != is->audio_src.channel_layout ||
2242                 is->frame->sample_rate   != is->audio_src.freq           ||
2243                 (wanted_nb_samples       != is->frame->nb_samples && !is->swr_ctx)) {
2244                 swr_free(&is->swr_ctx);
2245                 is->swr_ctx = swr_alloc_set_opts(NULL,
2246                                                  is->audio_tgt.channel_layout, is->audio_tgt.fmt, is->audio_tgt.freq,
2247                                                  dec_channel_layout,           is->frame->format, is->frame->sample_rate,
2248                                                  0, NULL);
2249                 if (!is->swr_ctx || swr_init(is->swr_ctx) < 0) {
2250                     av_log(NULL, AV_LOG_ERROR,
2251                            "Cannot create sample rate converter for conversion of %d Hz %s %d channels to %d Hz %s %d channels!\n",
2252                             is->frame->sample_rate, av_get_sample_fmt_name(is->frame->format), av_frame_get_channels(is->frame),
2253                             is->audio_tgt.freq, av_get_sample_fmt_name(is->audio_tgt.fmt), is->audio_tgt.channels);
2254                     break;
2255                 }
2256                 is->audio_src.channel_layout = dec_channel_layout;
2257                 is->audio_src.channels       = av_frame_get_channels(is->frame);
2258                 is->audio_src.freq = is->frame->sample_rate;
2259                 is->audio_src.fmt = is->frame->format;
2260             }
2261
2262             if (is->swr_ctx) {
2263                 const uint8_t **in = (const uint8_t **)is->frame->extended_data;
2264                 uint8_t **out = &is->audio_buf1;
2265                 int out_count = (int64_t)wanted_nb_samples * is->audio_tgt.freq / is->frame->sample_rate + 256;
2266                 int out_size  = av_samples_get_buffer_size(NULL, is->audio_tgt.channels, out_count, is->audio_tgt.fmt, 0);
2267                 int len2;
2268                 if (out_size < 0) {
2269                     av_log(NULL, AV_LOG_ERROR, "av_samples_get_buffer_size() failed\n");
2270                     break;
2271                 }
2272                 if (wanted_nb_samples != is->frame->nb_samples) {
2273                     if (swr_set_compensation(is->swr_ctx, (wanted_nb_samples - is->frame->nb_samples) * is->audio_tgt.freq / is->frame->sample_rate,
2274                                                 wanted_nb_samples * is->audio_tgt.freq / is->frame->sample_rate) < 0) {
2275                         av_log(NULL, AV_LOG_ERROR, "swr_set_compensation() failed\n");
2276                         break;
2277                     }
2278                 }
2279                 av_fast_malloc(&is->audio_buf1, &is->audio_buf1_size, out_size);
2280                 if (!is->audio_buf1)
2281                     return AVERROR(ENOMEM);
2282                 len2 = swr_convert(is->swr_ctx, out, out_count, in, is->frame->nb_samples);
2283                 if (len2 < 0) {
2284                     av_log(NULL, AV_LOG_ERROR, "swr_convert() failed\n");
2285                     break;
2286                 }
2287                 if (len2 == out_count) {
2288                     av_log(NULL, AV_LOG_WARNING, "audio buffer is probably too small\n");
2289                     swr_init(is->swr_ctx);
2290                 }
2291                 is->audio_buf = is->audio_buf1;
2292                 resampled_data_size = len2 * is->audio_tgt.channels * av_get_bytes_per_sample(is->audio_tgt.fmt);
2293             } else {
2294                 is->audio_buf = is->frame->data[0];
2295                 resampled_data_size = data_size;
2296             }
2297
2298             audio_clock0 = is->audio_clock;
2299             /* update the audio clock with the pts */
2300             if (is->frame->pts != AV_NOPTS_VALUE) {
2301                 is->audio_clock = is->frame->pts * av_q2d(tb) + (double) is->frame->nb_samples / is->frame->sample_rate;
2302                 is->audio_clock_serial = is->audio_pkt_temp_serial;
2303             }
2304 #ifdef DEBUG
2305             {
2306                 static double last_clock;
2307                 printf("audio: delay=%0.3f clock=%0.3f clock0=%0.3f\n",
2308                        is->audio_clock - last_clock,
2309                        is->audio_clock, audio_clock0);
2310                 last_clock = is->audio_clock;
2311             }
2312 #endif
2313             return resampled_data_size;
2314         }
2315
2316         /* free the current packet */
2317         if (pkt->data)
2318             av_free_packet(pkt);
2319         memset(pkt_temp, 0, sizeof(*pkt_temp));
2320
2321         if (is->audioq.abort_request) {
2322             return -1;
2323         }
2324
2325         if (is->audioq.nb_packets == 0)
2326             SDL_CondSignal(is->continue_read_thread);
2327
2328         /* read next packet */
2329         if ((new_packet = packet_queue_get(&is->audioq, pkt, 1, &is->audio_pkt_temp_serial)) < 0)
2330             return -1;
2331
2332         if (pkt->data == flush_pkt.data) {
2333             avcodec_flush_buffers(dec);
2334             flush_complete = 0;
2335             is->audio_buf_frames_pending = 0;
2336         }
2337
2338         *pkt_temp = *pkt;
2339     }
2340 }
2341
2342 /* prepare a new audio buffer */
2343 static void sdl_audio_callback(void *opaque, Uint8 *stream, int len)
2344 {
2345     VideoState *is = opaque;
2346     int audio_size, len1;
2347     int bytes_per_sec;
2348     int frame_size = av_samples_get_buffer_size(NULL, is->audio_tgt.channels, 1, is->audio_tgt.fmt, 1);
2349
2350     audio_callback_time = av_gettime();
2351
2352     while (len > 0) {
2353         if (is->audio_buf_index >= is->audio_buf_size) {
2354            audio_size = audio_decode_frame(is);
2355            if (audio_size < 0) {
2356                 /* if error, just output silence */
2357                is->audio_buf      = is->silence_buf;
2358                is->audio_buf_size = sizeof(is->silence_buf) / frame_size * frame_size;
2359            } else {
2360                if (is->show_mode != SHOW_MODE_VIDEO)
2361                    update_sample_display(is, (int16_t *)is->audio_buf, audio_size);
2362                is->audio_buf_size = audio_size;
2363            }
2364            is->audio_buf_index = 0;
2365         }
2366         len1 = is->audio_buf_size - is->audio_buf_index;
2367         if (len1 > len)
2368             len1 = len;
2369         memcpy(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, len1);
2370         len -= len1;
2371         stream += len1;
2372         is->audio_buf_index += len1;
2373     }
2374     bytes_per_sec = is->audio_tgt.freq * is->audio_tgt.channels * av_get_bytes_per_sample(is->audio_tgt.fmt);
2375     is->audio_write_buf_size = is->audio_buf_size - is->audio_buf_index;
2376     /* Let's assume the audio driver that is used by SDL has two periods. */
2377     set_clock_at(&is->audclk, is->audio_clock - (double)(2 * is->audio_hw_buf_size + is->audio_write_buf_size) / bytes_per_sec, is->audio_clock_serial, audio_callback_time / 1000000.0);
2378     sync_clock_to_slave(&is->extclk, &is->audclk);
2379 }
2380
2381 static int audio_open(void *opaque, int64_t wanted_channel_layout, int wanted_nb_channels, int wanted_sample_rate, struct AudioParams *audio_hw_params)
2382 {
2383     SDL_AudioSpec wanted_spec, spec;
2384     const char *env;
2385     const int next_nb_channels[] = {0, 0, 1, 6, 2, 6, 4, 6};
2386
2387     env = SDL_getenv("SDL_AUDIO_CHANNELS");
2388     if (env) {
2389         wanted_nb_channels = atoi(env);
2390         wanted_channel_layout = av_get_default_channel_layout(wanted_nb_channels);
2391     }
2392     if (!wanted_channel_layout || wanted_nb_channels != av_get_channel_layout_nb_channels(wanted_channel_layout)) {
2393         wanted_channel_layout = av_get_default_channel_layout(wanted_nb_channels);
2394         wanted_channel_layout &= ~AV_CH_LAYOUT_STEREO_DOWNMIX;
2395     }
2396     wanted_spec.channels = av_get_channel_layout_nb_channels(wanted_channel_layout);
2397     wanted_spec.freq = wanted_sample_rate;
2398     if (wanted_spec.freq <= 0 || wanted_spec.channels <= 0) {
2399         av_log(NULL, AV_LOG_ERROR, "Invalid sample rate or channel count!\n");
2400         return -1;
2401     }
2402     wanted_spec.format = AUDIO_S16SYS;
2403     wanted_spec.silence = 0;
2404     wanted_spec.samples = SDL_AUDIO_BUFFER_SIZE;
2405     wanted_spec.callback = sdl_audio_callback;
2406     wanted_spec.userdata = opaque;
2407     while (SDL_OpenAudio(&wanted_spec, &spec) < 0) {
2408         av_log(NULL, AV_LOG_WARNING, "SDL_OpenAudio (%d channels): %s\n", wanted_spec.channels, SDL_GetError());
2409         wanted_spec.channels = next_nb_channels[FFMIN(7, wanted_spec.channels)];
2410         if (!wanted_spec.channels) {
2411             av_log(NULL, AV_LOG_ERROR,
2412                    "No more channel combinations to try, audio open failed\n");
2413             return -1;
2414         }
2415         wanted_channel_layout = av_get_default_channel_layout(wanted_spec.channels);
2416     }
2417     if (spec.format != AUDIO_S16SYS) {
2418         av_log(NULL, AV_LOG_ERROR,
2419                "SDL advised audio format %d is not supported!\n", spec.format);
2420         return -1;
2421     }
2422     if (spec.channels != wanted_spec.channels) {
2423         wanted_channel_layout = av_get_default_channel_layout(spec.channels);
2424         if (!wanted_channel_layout) {
2425             av_log(NULL, AV_LOG_ERROR,
2426                    "SDL advised channel count %d is not supported!\n", spec.channels);
2427             return -1;
2428         }
2429     }
2430
2431     audio_hw_params->fmt = AV_SAMPLE_FMT_S16;
2432     audio_hw_params->freq = spec.freq;
2433     audio_hw_params->channel_layout = wanted_channel_layout;
2434     audio_hw_params->channels =  spec.channels;
2435     return spec.size;
2436 }
2437
2438 /* open a given stream. Return 0 if OK */
2439 static int stream_component_open(VideoState *is, int stream_index)
2440 {
2441     AVFormatContext *ic = is->ic;
2442     AVCodecContext *avctx;
2443     AVCodec *codec;
2444     const char *forced_codec_name = NULL;
2445     AVDictionary *opts;
2446     AVDictionaryEntry *t = NULL;
2447     int sample_rate, nb_channels;
2448     int64_t channel_layout;
2449     int ret;
2450
2451     if (stream_index < 0 || stream_index >= ic->nb_streams)
2452         return -1;
2453     avctx = ic->streams[stream_index]->codec;
2454
2455     codec = avcodec_find_decoder(avctx->codec_id);
2456
2457     switch(avctx->codec_type){
2458         case AVMEDIA_TYPE_AUDIO   : is->last_audio_stream    = stream_index; forced_codec_name =    audio_codec_name; break;
2459         case AVMEDIA_TYPE_SUBTITLE: is->last_subtitle_stream = stream_index; forced_codec_name = subtitle_codec_name; break;
2460         case AVMEDIA_TYPE_VIDEO   : is->last_video_stream    = stream_index; forced_codec_name =    video_codec_name; break;
2461     }
2462     if (forced_codec_name)
2463         codec = avcodec_find_decoder_by_name(forced_codec_name);
2464     if (!codec) {
2465         if (forced_codec_name) av_log(NULL, AV_LOG_WARNING,
2466                                       "No codec could be found with name '%s'\n", forced_codec_name);
2467         else                   av_log(NULL, AV_LOG_WARNING,
2468                                       "No codec could be found with id %d\n", avctx->codec_id);
2469         return -1;
2470     }
2471
2472     avctx->codec_id = codec->id;
2473     avctx->workaround_bugs   = workaround_bugs;
2474     avctx->lowres            = lowres;
2475     if(avctx->lowres > codec->max_lowres){
2476         av_log(avctx, AV_LOG_WARNING, "The maximum value for lowres supported by the decoder is %d\n",
2477                 codec->max_lowres);
2478         avctx->lowres= codec->max_lowres;
2479     }
2480     avctx->idct_algo         = idct;
2481     avctx->error_concealment = error_concealment;
2482
2483     if(avctx->lowres) avctx->flags |= CODEC_FLAG_EMU_EDGE;
2484     if (fast)   avctx->flags2 |= CODEC_FLAG2_FAST;
2485     if(codec->capabilities & CODEC_CAP_DR1)
2486         avctx->flags |= CODEC_FLAG_EMU_EDGE;
2487
2488     opts = filter_codec_opts(codec_opts, avctx->codec_id, ic, ic->streams[stream_index], codec);
2489     if (!av_dict_get(opts, "threads", NULL, 0))
2490         av_dict_set(&opts, "threads", "auto", 0);
2491     if (avctx->lowres)
2492         av_dict_set(&opts, "lowres", av_asprintf("%d", avctx->lowres), AV_DICT_DONT_STRDUP_VAL);
2493     if (avctx->codec_type == AVMEDIA_TYPE_VIDEO || avctx->codec_type == AVMEDIA_TYPE_AUDIO)
2494         av_dict_set(&opts, "refcounted_frames", "1", 0);
2495     if (avcodec_open2(avctx, codec, &opts) < 0)
2496         return -1;
2497     if ((t = av_dict_get(opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2498         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2499         return AVERROR_OPTION_NOT_FOUND;
2500     }
2501
2502     ic->streams[stream_index]->discard = AVDISCARD_DEFAULT;
2503     switch (avctx->codec_type) {
2504     case AVMEDIA_TYPE_AUDIO:
2505 #if CONFIG_AVFILTER
2506         {
2507             AVFilterLink *link;
2508
2509             is->audio_filter_src.freq           = avctx->sample_rate;
2510             is->audio_filter_src.channels       = avctx->channels;
2511             is->audio_filter_src.channel_layout = get_valid_channel_layout(avctx->channel_layout, avctx->channels);
2512             is->audio_filter_src.fmt            = avctx->sample_fmt;
2513             if ((ret = configure_audio_filters(is, afilters, 0)) < 0)
2514                 return ret;
2515             link = is->out_audio_filter->inputs[0];
2516             sample_rate    = link->sample_rate;
2517             nb_channels    = link->channels;
2518             channel_layout = link->channel_layout;
2519         }
2520 #else
2521         sample_rate    = avctx->sample_rate;
2522         nb_channels    = avctx->channels;
2523         channel_layout = avctx->channel_layout;
2524 #endif
2525
2526         /* prepare audio output */
2527         if ((ret = audio_open(is, channel_layout, nb_channels, sample_rate, &is->audio_tgt)) < 0)
2528             return ret;
2529         is->audio_hw_buf_size = ret;
2530         is->audio_src = is->audio_tgt;
2531         is->audio_buf_size  = 0;
2532         is->audio_buf_index = 0;
2533
2534         /* init averaging filter */
2535         is->audio_diff_avg_coef  = exp(log(0.01) / AUDIO_DIFF_AVG_NB);
2536         is->audio_diff_avg_count = 0;
2537         /* since we do not have a precise anough audio fifo fullness,
2538            we correct audio sync only if larger than this threshold */
2539         is->audio_diff_threshold = 2.0 * is->audio_hw_buf_size / av_samples_get_buffer_size(NULL, is->audio_tgt.channels, is->audio_tgt.freq, is->audio_tgt.fmt, 1);
2540
2541         memset(&is->audio_pkt, 0, sizeof(is->audio_pkt));
2542         memset(&is->audio_pkt_temp, 0, sizeof(is->audio_pkt_temp));
2543
2544         is->audio_stream = stream_index;
2545         is->audio_st = ic->streams[stream_index];
2546
2547         packet_queue_start(&is->audioq);
2548         SDL_PauseAudio(0);
2549         break;
2550     case AVMEDIA_TYPE_VIDEO:
2551         is->video_stream = stream_index;
2552         is->video_st = ic->streams[stream_index];
2553
2554         packet_queue_start(&is->videoq);
2555         is->video_tid = SDL_CreateThread(video_thread, is);
2556         is->queue_attachments_req = 1;
2557         break;
2558     case AVMEDIA_TYPE_SUBTITLE:
2559         is->subtitle_stream = stream_index;
2560         is->subtitle_st = ic->streams[stream_index];
2561         packet_queue_start(&is->subtitleq);
2562
2563         is->subtitle_tid = SDL_CreateThread(subtitle_thread, is);
2564         break;
2565     default:
2566         break;
2567     }
2568     return 0;
2569 }
2570
2571 static void stream_component_close(VideoState *is, int stream_index)
2572 {
2573     AVFormatContext *ic = is->ic;
2574     AVCodecContext *avctx;
2575
2576     if (stream_index < 0 || stream_index >= ic->nb_streams)
2577         return;
2578     avctx = ic->streams[stream_index]->codec;
2579
2580     switch (avctx->codec_type) {
2581     case AVMEDIA_TYPE_AUDIO:
2582         packet_queue_abort(&is->audioq);
2583
2584         SDL_CloseAudio();
2585
2586         packet_queue_flush(&is->audioq);
2587         av_free_packet(&is->audio_pkt);
2588         swr_free(&is->swr_ctx);
2589         av_freep(&is->audio_buf1);
2590         is->audio_buf1_size = 0;
2591         is->audio_buf = NULL;
2592         av_frame_free(&is->frame);
2593
2594         if (is->rdft) {
2595             av_rdft_end(is->rdft);
2596             av_freep(&is->rdft_data);
2597             is->rdft = NULL;
2598             is->rdft_bits = 0;
2599         }
2600 #if CONFIG_AVFILTER
2601         avfilter_graph_free(&is->agraph);
2602 #endif
2603         break;
2604     case AVMEDIA_TYPE_VIDEO:
2605         packet_queue_abort(&is->videoq);
2606
2607         /* note: we also signal this mutex to make sure we deblock the
2608            video thread in all cases */
2609         SDL_LockMutex(is->pictq_mutex);
2610         SDL_CondSignal(is->pictq_cond);
2611         SDL_UnlockMutex(is->pictq_mutex);
2612
2613         SDL_WaitThread(is->video_tid, NULL);
2614
2615         packet_queue_flush(&is->videoq);
2616         break;
2617     case AVMEDIA_TYPE_SUBTITLE:
2618         packet_queue_abort(&is->subtitleq);
2619
2620         /* note: we also signal this mutex to make sure we deblock the
2621            video thread in all cases */
2622         SDL_LockMutex(is->subpq_mutex);
2623         SDL_CondSignal(is->subpq_cond);
2624         SDL_UnlockMutex(is->subpq_mutex);
2625
2626         SDL_WaitThread(is->subtitle_tid, NULL);
2627
2628         packet_queue_flush(&is->subtitleq);
2629         break;
2630     default:
2631         break;
2632     }
2633
2634     ic->streams[stream_index]->discard = AVDISCARD_ALL;
2635     avcodec_close(avctx);
2636     switch (avctx->codec_type) {
2637     case AVMEDIA_TYPE_AUDIO:
2638         is->audio_st = NULL;
2639         is->audio_stream = -1;
2640         break;
2641     case AVMEDIA_TYPE_VIDEO:
2642         is->video_st = NULL;
2643         is->video_stream = -1;
2644         break;
2645     case AVMEDIA_TYPE_SUBTITLE:
2646         is->subtitle_st = NULL;
2647         is->subtitle_stream = -1;
2648         break;
2649     default:
2650         break;
2651     }
2652 }
2653
2654 static int decode_interrupt_cb(void *ctx)
2655 {
2656     VideoState *is = ctx;
2657     return is->abort_request;
2658 }
2659
2660 static int is_realtime(AVFormatContext *s)
2661 {
2662     if(   !strcmp(s->iformat->name, "rtp")
2663        || !strcmp(s->iformat->name, "rtsp")
2664        || !strcmp(s->iformat->name, "sdp")
2665     )
2666         return 1;
2667
2668     if(s->pb && (   !strncmp(s->filename, "rtp:", 4)
2669                  || !strncmp(s->filename, "udp:", 4)
2670                 )
2671     )
2672         return 1;
2673     return 0;
2674 }
2675
2676 /* this thread gets the stream from the disk or the network */
2677 static int read_thread(void *arg)
2678 {
2679     VideoState *is = arg;
2680     AVFormatContext *ic = NULL;
2681     int err, i, ret;
2682     int st_index[AVMEDIA_TYPE_NB];
2683     AVPacket pkt1, *pkt = &pkt1;
2684     int eof = 0;
2685     int pkt_in_play_range = 0;
2686     AVDictionaryEntry *t;
2687     AVDictionary **opts;
2688     int orig_nb_streams;
2689     SDL_mutex *wait_mutex = SDL_CreateMutex();
2690
2691     memset(st_index, -1, sizeof(st_index));
2692     is->last_video_stream = is->video_stream = -1;
2693     is->last_audio_stream = is->audio_stream = -1;
2694     is->last_subtitle_stream = is->subtitle_stream = -1;
2695
2696     ic = avformat_alloc_context();
2697     ic->interrupt_callback.callback = decode_interrupt_cb;
2698     ic->interrupt_callback.opaque = is;
2699     err = avformat_open_input(&ic, is->filename, is->iformat, &format_opts);
2700     if (err < 0) {
2701         print_error(is->filename, err);
2702         ret = -1;
2703         goto fail;
2704     }
2705     if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2706         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2707         ret = AVERROR_OPTION_NOT_FOUND;
2708         goto fail;
2709     }
2710     is->ic = ic;
2711
2712     if (genpts)
2713         ic->flags |= AVFMT_FLAG_GENPTS;
2714
2715     opts = setup_find_stream_info_opts(ic, codec_opts);
2716     orig_nb_streams = ic->nb_streams;
2717
2718     err = avformat_find_stream_info(ic, opts);
2719     if (err < 0) {
2720         av_log(NULL, AV_LOG_WARNING,
2721                "%s: could not find codec parameters\n", is->filename);
2722         ret = -1;
2723         goto fail;
2724     }
2725     for (i = 0; i < orig_nb_streams; i++)
2726         av_dict_free(&opts[i]);
2727     av_freep(&opts);
2728
2729     if (ic->pb)
2730         ic->pb->eof_reached = 0; // FIXME hack, ffplay maybe should not use url_feof() to test for the end
2731
2732     if (seek_by_bytes < 0)
2733         seek_by_bytes = !!(ic->iformat->flags & AVFMT_TS_DISCONT) && strcmp("ogg", ic->iformat->name);
2734
2735     is->max_frame_duration = (ic->iformat->flags & AVFMT_TS_DISCONT) ? 10.0 : 3600.0;
2736
2737     if (!window_title && (t = av_dict_get(ic->metadata, "title", NULL, 0)))
2738         window_title = av_asprintf("%s - %s", t->value, input_filename);
2739
2740     /* if seeking requested, we execute it */
2741     if (start_time != AV_NOPTS_VALUE) {
2742         int64_t timestamp;
2743
2744         timestamp = start_time;
2745         /* add the stream start time */
2746         if (ic->start_time != AV_NOPTS_VALUE)
2747             timestamp += ic->start_time;
2748         ret = avformat_seek_file(ic, -1, INT64_MIN, timestamp, INT64_MAX, 0);
2749         if (ret < 0) {
2750             av_log(NULL, AV_LOG_WARNING, "%s: could not seek to position %0.3f\n",
2751                     is->filename, (double)timestamp / AV_TIME_BASE);
2752         }
2753     }
2754
2755     is->realtime = is_realtime(ic);
2756
2757     for (i = 0; i < ic->nb_streams; i++)
2758         ic->streams[i]->discard = AVDISCARD_ALL;
2759     if (!video_disable)
2760         st_index[AVMEDIA_TYPE_VIDEO] =
2761             av_find_best_stream(ic, AVMEDIA_TYPE_VIDEO,
2762                                 wanted_stream[AVMEDIA_TYPE_VIDEO], -1, NULL, 0);
2763     if (!audio_disable)
2764         st_index[AVMEDIA_TYPE_AUDIO] =
2765             av_find_best_stream(ic, AVMEDIA_TYPE_AUDIO,
2766                                 wanted_stream[AVMEDIA_TYPE_AUDIO],
2767                                 st_index[AVMEDIA_TYPE_VIDEO],
2768                                 NULL, 0);
2769     if (!video_disable && !subtitle_disable)
2770         st_index[AVMEDIA_TYPE_SUBTITLE] =
2771             av_find_best_stream(ic, AVMEDIA_TYPE_SUBTITLE,
2772                                 wanted_stream[AVMEDIA_TYPE_SUBTITLE],
2773                                 (st_index[AVMEDIA_TYPE_AUDIO] >= 0 ?
2774                                  st_index[AVMEDIA_TYPE_AUDIO] :
2775                                  st_index[AVMEDIA_TYPE_VIDEO]),
2776                                 NULL, 0);
2777     if (show_status) {
2778         av_dump_format(ic, 0, is->filename, 0);
2779     }
2780
2781     is->show_mode = show_mode;
2782
2783     /* open the streams */
2784     if (st_index[AVMEDIA_TYPE_AUDIO] >= 0) {
2785         stream_component_open(is, st_index[AVMEDIA_TYPE_AUDIO]);
2786     }
2787
2788     ret = -1;
2789     if (st_index[AVMEDIA_TYPE_VIDEO] >= 0) {
2790         ret = stream_component_open(is, st_index[AVMEDIA_TYPE_VIDEO]);
2791     }
2792     if (is->show_mode == SHOW_MODE_NONE)
2793         is->show_mode = ret >= 0 ? SHOW_MODE_VIDEO : SHOW_MODE_RDFT;
2794
2795     if (st_index[AVMEDIA_TYPE_SUBTITLE] >= 0) {
2796         stream_component_open(is, st_index[AVMEDIA_TYPE_SUBTITLE]);
2797     }
2798
2799     if (is->video_stream < 0 && is->audio_stream < 0) {
2800         av_log(NULL, AV_LOG_FATAL, "%s: could not open codecs\n", is->filename);
2801         ret = -1;
2802         goto fail;
2803     }
2804
2805     if (infinite_buffer < 0 && is->realtime)
2806         infinite_buffer = 1;
2807
2808     for (;;) {
2809         if (is->abort_request)
2810             break;
2811         if (is->paused != is->last_paused) {
2812             is->last_paused = is->paused;
2813             if (is->paused)
2814                 is->read_pause_return = av_read_pause(ic);
2815             else
2816                 av_read_play(ic);
2817         }
2818 #if CONFIG_RTSP_DEMUXER || CONFIG_MMSH_PROTOCOL
2819         if (is->paused &&
2820                 (!strcmp(ic->iformat->name, "rtsp") ||
2821                  (ic->pb && !strncmp(input_filename, "mmsh:", 5)))) {
2822             /* wait 10 ms to avoid trying to get another packet */
2823             /* XXX: horrible */
2824             SDL_Delay(10);
2825             continue;
2826         }
2827 #endif
2828         if (is->seek_req) {
2829             int64_t seek_target = is->seek_pos;
2830             int64_t seek_min    = is->seek_rel > 0 ? seek_target - is->seek_rel + 2: INT64_MIN;
2831             int64_t seek_max    = is->seek_rel < 0 ? seek_target - is->seek_rel - 2: INT64_MAX;
2832 // FIXME the +-2 is due to rounding being not done in the correct direction in generation
2833 //      of the seek_pos/seek_rel variables
2834
2835             ret = avformat_seek_file(is->ic, -1, seek_min, seek_target, seek_max, is->seek_flags);
2836             if (ret < 0) {
2837                 av_log(NULL, AV_LOG_ERROR,
2838                        "%s: error while seeking\n", is->ic->filename);
2839             } else {
2840                 if (is->audio_stream >= 0) {
2841                     packet_queue_flush(&is->audioq);
2842                     packet_queue_put(&is->audioq, &flush_pkt);
2843                 }
2844                 if (is->subtitle_stream >= 0) {
2845                     packet_queue_flush(&is->subtitleq);
2846                     packet_queue_put(&is->subtitleq, &flush_pkt);
2847                 }
2848                 if (is->video_stream >= 0) {
2849                     packet_queue_flush(&is->videoq);
2850                     packet_queue_put(&is->videoq, &flush_pkt);
2851                 }
2852                 if (is->seek_flags & AVSEEK_FLAG_BYTE) {
2853                    set_clock(&is->extclk, NAN, 0);
2854                 } else {
2855                    set_clock(&is->extclk, seek_target / (double)AV_TIME_BASE, 0);
2856                 }
2857             }
2858             is->seek_req = 0;
2859             is->queue_attachments_req = 1;
2860             eof = 0;
2861             if (is->paused)
2862                 step_to_next_frame(is);
2863         }
2864         if (is->queue_attachments_req) {
2865             if (is->video_st && is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC) {
2866                 AVPacket copy;
2867                 if ((ret = av_copy_packet(&copy, &is->video_st->attached_pic)) < 0)
2868                     goto fail;
2869                 packet_queue_put(&is->videoq, &copy);
2870             }
2871             is->queue_attachments_req = 0;
2872         }
2873
2874         /* if the queue are full, no need to read more */
2875         if (infinite_buffer<1 &&
2876               (is->audioq.size + is->videoq.size + is->subtitleq.size > MAX_QUEUE_SIZE
2877             || (   (is->audioq   .nb_packets > MIN_FRAMES || is->audio_stream < 0 || is->audioq.abort_request)
2878                 && (is->videoq   .nb_packets > MIN_FRAMES || is->video_stream < 0 || is->videoq.abort_request
2879                     || (is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC))
2880                 && (is->subtitleq.nb_packets > MIN_FRAMES || is->subtitle_stream < 0 || is->subtitleq.abort_request)))) {
2881             /* wait 10 ms */
2882             SDL_LockMutex(wait_mutex);
2883             SDL_CondWaitTimeout(is->continue_read_thread, wait_mutex, 10);
2884             SDL_UnlockMutex(wait_mutex);
2885             continue;
2886         }
2887         if (eof) {
2888             if (is->video_stream >= 0) {
2889                 av_init_packet(pkt);
2890                 pkt->data = NULL;
2891                 pkt->size = 0;
2892                 pkt->stream_index = is->video_stream;
2893                 packet_queue_put(&is->videoq, pkt);
2894             }
2895             if (is->audio_stream >= 0) {
2896                 av_init_packet(pkt);
2897                 pkt->data = NULL;
2898                 pkt->size = 0;
2899                 pkt->stream_index = is->audio_stream;
2900                 packet_queue_put(&is->audioq, pkt);
2901             }
2902             SDL_Delay(10);
2903             if (is->audioq.size + is->videoq.size + is->subtitleq.size == 0) {
2904                 if (loop != 1 && (!loop || --loop)) {
2905                     stream_seek(is, start_time != AV_NOPTS_VALUE ? start_time : 0, 0, 0);
2906                 } else if (autoexit) {
2907                     ret = AVERROR_EOF;
2908                     goto fail;
2909                 }
2910             }
2911             eof=0;
2912             continue;
2913         }
2914         ret = av_read_frame(ic, pkt);
2915         if (ret < 0) {
2916             if (ret == AVERROR_EOF || url_feof(ic->pb))
2917                 eof = 1;
2918             if (ic->pb && ic->pb->error)
2919                 break;
2920             SDL_LockMutex(wait_mutex);
2921             SDL_CondWaitTimeout(is->continue_read_thread, wait_mutex, 10);
2922             SDL_UnlockMutex(wait_mutex);
2923             continue;
2924         }
2925         /* check if packet is in play range specified by user, then queue, otherwise discard */
2926         pkt_in_play_range = duration == AV_NOPTS_VALUE ||
2927                 (pkt->pts - ic->streams[pkt->stream_index]->start_time) *
2928                 av_q2d(ic->streams[pkt->stream_index]->time_base) -
2929                 (double)(start_time != AV_NOPTS_VALUE ? start_time : 0) / 1000000
2930                 <= ((double)duration / 1000000);
2931         if (pkt->stream_index == is->audio_stream && pkt_in_play_range) {
2932             packet_queue_put(&is->audioq, pkt);
2933         } else if (pkt->stream_index == is->video_stream && pkt_in_play_range
2934                    && !(is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
2935             packet_queue_put(&is->videoq, pkt);
2936         } else if (pkt->stream_index == is->subtitle_stream && pkt_in_play_range) {
2937             packet_queue_put(&is->subtitleq, pkt);
2938         } else {
2939             av_free_packet(pkt);
2940         }
2941     }
2942     /* wait until the end */
2943     while (!is->abort_request) {
2944         SDL_Delay(100);
2945     }
2946
2947     ret = 0;
2948  fail:
2949     /* close each stream */
2950     if (is->audio_stream >= 0)
2951         stream_component_close(is, is->audio_stream);
2952     if (is->video_stream >= 0)
2953         stream_component_close(is, is->video_stream);
2954     if (is->subtitle_stream >= 0)
2955         stream_component_close(is, is->subtitle_stream);
2956     if (is->ic) {
2957         avformat_close_input(&is->ic);
2958     }
2959
2960     if (ret != 0) {
2961         SDL_Event event;
2962
2963         event.type = FF_QUIT_EVENT;
2964         event.user.data1 = is;
2965         SDL_PushEvent(&event);
2966     }
2967     SDL_DestroyMutex(wait_mutex);
2968     return 0;
2969 }
2970
2971 static VideoState *stream_open(const char *filename, AVInputFormat *iformat)
2972 {
2973     VideoState *is;
2974
2975     is = av_mallocz(sizeof(VideoState));
2976     if (!is)
2977         return NULL;
2978     av_strlcpy(is->filename, filename, sizeof(is->filename));
2979     is->iformat = iformat;
2980     is->ytop    = 0;
2981     is->xleft   = 0;
2982
2983     /* start video display */
2984     is->pictq_mutex = SDL_CreateMutex();
2985     is->pictq_cond  = SDL_CreateCond();
2986
2987     is->subpq_mutex = SDL_CreateMutex();
2988     is->subpq_cond  = SDL_CreateCond();
2989
2990     packet_queue_init(&is->videoq);
2991     packet_queue_init(&is->audioq);
2992     packet_queue_init(&is->subtitleq);
2993
2994     is->continue_read_thread = SDL_CreateCond();
2995
2996     init_clock(&is->vidclk, &is->videoq.serial);
2997     init_clock(&is->audclk, &is->audioq.serial);
2998     init_clock(&is->extclk, &is->extclk.serial);
2999     is->audio_clock_serial = -1;
3000     is->audio_last_serial = -1;
3001     is->av_sync_type = av_sync_type;
3002     is->read_tid     = SDL_CreateThread(read_thread, is);
3003     if (!is->read_tid) {
3004         av_free(is);
3005         return NULL;
3006     }
3007     return is;
3008 }
3009
3010 static void stream_cycle_channel(VideoState *is, int codec_type)
3011 {
3012     AVFormatContext *ic = is->ic;
3013     int start_index, stream_index;
3014     int old_index;
3015     AVStream *st;
3016
3017     if (codec_type == AVMEDIA_TYPE_VIDEO) {
3018         start_index = is->last_video_stream;
3019         old_index = is->video_stream;
3020     } else if (codec_type == AVMEDIA_TYPE_AUDIO) {
3021         start_index = is->last_audio_stream;
3022         old_index = is->audio_stream;
3023     } else {
3024         start_index = is->last_subtitle_stream;
3025         old_index = is->subtitle_stream;
3026     }
3027     stream_index = start_index;
3028     for (;;) {
3029         if (++stream_index >= is->ic->nb_streams)
3030         {
3031             if (codec_type == AVMEDIA_TYPE_SUBTITLE)
3032             {
3033                 stream_index = -1;
3034                 is->last_subtitle_stream = -1;
3035                 goto the_end;
3036             }
3037             if (start_index == -1)
3038                 return;
3039             stream_index = 0;
3040         }
3041         if (stream_index == start_index)
3042             return;
3043         st = ic->streams[stream_index];
3044         if (st->codec->codec_type == codec_type) {
3045             /* check that parameters are OK */
3046             switch (codec_type) {
3047             case AVMEDIA_TYPE_AUDIO:
3048                 if (st->codec->sample_rate != 0 &&
3049                     st->codec->channels != 0)
3050                     goto the_end;
3051                 break;
3052             case AVMEDIA_TYPE_VIDEO:
3053             case AVMEDIA_TYPE_SUBTITLE:
3054                 goto the_end;
3055             default:
3056                 break;
3057             }
3058         }
3059     }
3060  the_end:
3061     stream_component_close(is, old_index);
3062     stream_component_open(is, stream_index);
3063 }
3064
3065
3066 static void toggle_full_screen(VideoState *is)
3067 {
3068 #if defined(__APPLE__) && SDL_VERSION_ATLEAST(1, 2, 14)
3069     /* OS X needs to reallocate the SDL overlays */
3070     int i;
3071     for (i = 0; i < VIDEO_PICTURE_QUEUE_SIZE; i++)
3072         is->pictq[i].reallocate = 1;
3073 #endif
3074     is_full_screen = !is_full_screen;
3075     video_open(is, 1, NULL);
3076 }
3077
3078 static void toggle_audio_display(VideoState *is)
3079 {
3080     int bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
3081     int next = is->show_mode;
3082     do {
3083         next = (next + 1) % SHOW_MODE_NB;
3084     } while (next != is->show_mode && (next == SHOW_MODE_VIDEO && !is->video_st || next != SHOW_MODE_VIDEO && !is->audio_st));
3085     if (is->show_mode != next) {
3086         fill_rectangle(screen,
3087                     is->xleft, is->ytop, is->width, is->height,
3088                     bgcolor, 1);
3089         is->force_refresh = 1;
3090         is->show_mode = next;
3091     }
3092 }
3093
3094 static void refresh_loop_wait_event(VideoState *is, SDL_Event *event) {
3095     double remaining_time = 0.0;
3096     SDL_PumpEvents();
3097     while (!SDL_PeepEvents(event, 1, SDL_GETEVENT, SDL_ALLEVENTS)) {
3098         if (!cursor_hidden && av_gettime() - cursor_last_shown > CURSOR_HIDE_DELAY) {
3099             SDL_ShowCursor(0);
3100             cursor_hidden = 1;
3101         }
3102         if (remaining_time > 0.0)
3103             av_usleep((int64_t)(remaining_time * 1000000.0));
3104         remaining_time = REFRESH_RATE;
3105         if (is->show_mode != SHOW_MODE_NONE && (!is->paused || is->force_refresh))
3106             video_refresh(is, &remaining_time);
3107         SDL_PumpEvents();
3108     }
3109 }
3110
3111 /* handle an event sent by the GUI */
3112 static void event_loop(VideoState *cur_stream)
3113 {
3114     SDL_Event event;
3115     double incr, pos, frac;
3116
3117     for (;;) {
3118         double x;
3119         refresh_loop_wait_event(cur_stream, &event);
3120         switch (event.type) {
3121         case SDL_KEYDOWN:
3122             if (exit_on_keydown) {
3123                 do_exit(cur_stream);
3124                 break;
3125             }
3126             switch (event.key.keysym.sym) {
3127             case SDLK_ESCAPE:
3128             case SDLK_q:
3129                 do_exit(cur_stream);
3130                 break;
3131             case SDLK_f:
3132                 toggle_full_screen(cur_stream);
3133                 cur_stream->force_refresh = 1;
3134                 break;
3135             case SDLK_p:
3136             case SDLK_SPACE:
3137                 toggle_pause(cur_stream);
3138                 break;
3139             case SDLK_s: // S: Step to next frame
3140                 step_to_next_frame(cur_stream);
3141                 break;
3142             case SDLK_a:
3143                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_AUDIO);
3144                 break;
3145             case SDLK_v:
3146                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_VIDEO);
3147                 break;
3148             case SDLK_t:
3149                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_SUBTITLE);
3150                 break;
3151             case SDLK_w:
3152                 toggle_audio_display(cur_stream);
3153                 break;
3154             case SDLK_PAGEUP:
3155                 incr = 600.0;
3156                 goto do_seek;
3157             case SDLK_PAGEDOWN:
3158                 incr = -600.0;
3159                 goto do_seek;
3160             case SDLK_LEFT:
3161                 incr = -10.0;
3162                 goto do_seek;
3163             case SDLK_RIGHT:
3164                 incr = 10.0;
3165                 goto do_seek;
3166             case SDLK_UP:
3167                 incr = 60.0;
3168                 goto do_seek;
3169             case SDLK_DOWN:
3170                 incr = -60.0;
3171             do_seek:
3172                     if (seek_by_bytes) {
3173                         if (cur_stream->video_stream >= 0 && cur_stream->video_current_pos >= 0) {
3174                             pos = cur_stream->video_current_pos;
3175                         } else if (cur_stream->audio_stream >= 0 && cur_stream->audio_pkt.pos >= 0) {
3176                             pos = cur_stream->audio_pkt.pos;
3177                         } else
3178                             pos = avio_tell(cur_stream->ic->pb);
3179                         if (cur_stream->ic->bit_rate)
3180                             incr *= cur_stream->ic->bit_rate / 8.0;
3181                         else
3182                             incr *= 180000.0;
3183                         pos += incr;
3184                         stream_seek(cur_stream, pos, incr, 1);
3185                     } else {
3186                         pos = get_master_clock(cur_stream);
3187                         if (isnan(pos))
3188                             pos = (double)cur_stream->seek_pos / AV_TIME_BASE;
3189                         pos += incr;
3190                         if (cur_stream->ic->start_time != AV_NOPTS_VALUE && pos < cur_stream->ic->start_time / (double)AV_TIME_BASE)
3191                             pos = cur_stream->ic->start_time / (double)AV_TIME_BASE;
3192                         stream_seek(cur_stream, (int64_t)(pos * AV_TIME_BASE), (int64_t)(incr * AV_TIME_BASE), 0);
3193                     }
3194                 break;
3195             default:
3196                 break;
3197             }
3198             break;
3199         case SDL_VIDEOEXPOSE:
3200             cur_stream->force_refresh = 1;
3201             break;
3202         case SDL_MOUSEBUTTONDOWN:
3203             if (exit_on_mousedown) {
3204                 do_exit(cur_stream);
3205                 break;
3206             }
3207         case SDL_MOUSEMOTION:
3208             if (cursor_hidden) {
3209                 SDL_ShowCursor(1);
3210                 cursor_hidden = 0;
3211             }
3212             cursor_last_shown = av_gettime();
3213             if (event.type == SDL_MOUSEBUTTONDOWN) {
3214                 x = event.button.x;
3215             } else {
3216                 if (event.motion.state != SDL_PRESSED)
3217                     break;
3218                 x = event.motion.x;
3219             }
3220                 if (seek_by_bytes || cur_stream->ic->duration <= 0) {
3221                     uint64_t size =  avio_size(cur_stream->ic->pb);
3222                     stream_seek(cur_stream, size*x/cur_stream->width, 0, 1);
3223                 } else {
3224                     int64_t ts;
3225                     int ns, hh, mm, ss;
3226                     int tns, thh, tmm, tss;
3227                     tns  = cur_stream->ic->duration / 1000000LL;
3228                     thh  = tns / 3600;
3229                     tmm  = (tns % 3600) / 60;
3230                     tss  = (tns % 60);
3231                     frac = x / cur_stream->width;
3232                     ns   = frac * tns;
3233                     hh   = ns / 3600;
3234                     mm   = (ns % 3600) / 60;
3235                     ss   = (ns % 60);
3236                     av_log(NULL, AV_LOG_INFO,
3237                            "Seek to %2.0f%% (%2d:%02d:%02d) of total duration (%2d:%02d:%02d)       \n", frac*100,
3238                             hh, mm, ss, thh, tmm, tss);
3239                     ts = frac * cur_stream->ic->duration;
3240                     if (cur_stream->ic->start_time != AV_NOPTS_VALUE)
3241                         ts += cur_stream->ic->start_time;
3242                     stream_seek(cur_stream, ts, 0, 0);
3243                 }
3244             break;
3245         case SDL_VIDEORESIZE:
3246                 screen = SDL_SetVideoMode(FFMIN(16383, event.resize.w), event.resize.h, 0,
3247                                           SDL_HWSURFACE|SDL_RESIZABLE|SDL_ASYNCBLIT|SDL_HWACCEL);
3248                 if (!screen) {
3249                     av_log(NULL, AV_LOG_FATAL, "Failed to set video mode\n");
3250                     do_exit(cur_stream);
3251                 }
3252                 screen_width  = cur_stream->width  = screen->w;
3253                 screen_height = cur_stream->height = screen->h;
3254                 cur_stream->force_refresh = 1;
3255             break;
3256         case SDL_QUIT:
3257         case FF_QUIT_EVENT:
3258             do_exit(cur_stream);
3259             break;
3260         case FF_ALLOC_EVENT:
3261             alloc_picture(event.user.data1);
3262             break;
3263         default:
3264             break;
3265         }
3266     }
3267 }
3268
3269 static int opt_frame_size(void *optctx, const char *opt, const char *arg)
3270 {
3271     av_log(NULL, AV_LOG_WARNING, "Option -s is deprecated, use -video_size.\n");
3272     return opt_default(NULL, "video_size", arg);
3273 }
3274
3275 static int opt_width(void *optctx, const char *opt, const char *arg)
3276 {
3277     screen_width = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
3278     return 0;
3279 }
3280
3281 static int opt_height(void *optctx, const char *opt, const char *arg)
3282 {
3283     screen_height = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
3284     return 0;
3285 }
3286
3287 static int opt_format(void *optctx, const char *opt, const char *arg)
3288 {
3289     file_iformat = av_find_input_format(arg);
3290     if (!file_iformat) {
3291         av_log(NULL, AV_LOG_FATAL, "Unknown input format: %s\n", arg);
3292         return AVERROR(EINVAL);
3293     }
3294     return 0;
3295 }
3296
3297 static int opt_frame_pix_fmt(void *optctx, const char *opt, const char *arg)
3298 {
3299     av_log(NULL, AV_LOG_WARNING, "Option -pix_fmt is deprecated, use -pixel_format.\n");
3300     return opt_default(NULL, "pixel_format", arg);
3301 }
3302
3303 static int opt_sync(void *optctx, const char *opt, const char *arg)
3304 {
3305     if (!strcmp(arg, "audio"))
3306         av_sync_type = AV_SYNC_AUDIO_MASTER;
3307     else if (!strcmp(arg, "video"))
3308         av_sync_type = AV_SYNC_VIDEO_MASTER;
3309     else if (!strcmp(arg, "ext"))
3310         av_sync_type = AV_SYNC_EXTERNAL_CLOCK;
3311     else {
3312         av_log(NULL, AV_LOG_ERROR, "Unknown value for %s: %s\n", opt, arg);
3313         exit(1);
3314     }
3315     return 0;
3316 }
3317
3318 static int opt_seek(void *optctx, const char *opt, const char *arg)
3319 {
3320     start_time = parse_time_or_die(opt, arg, 1);
3321     return 0;
3322 }
3323
3324 static int opt_duration(void *optctx, const char *opt, const char *arg)
3325 {
3326     duration = parse_time_or_die(opt, arg, 1);
3327     return 0;
3328 }
3329
3330 static int opt_show_mode(void *optctx, const char *opt, const char *arg)
3331 {
3332     show_mode = !strcmp(arg, "video") ? SHOW_MODE_VIDEO :
3333                 !strcmp(arg, "waves") ? SHOW_MODE_WAVES :
3334                 !strcmp(arg, "rdft" ) ? SHOW_MODE_RDFT  :
3335                 parse_number_or_die(opt, arg, OPT_INT, 0, SHOW_MODE_NB-1);
3336     return 0;
3337 }
3338
3339 static void opt_input_file(void *optctx, const char *filename)
3340 {
3341     if (input_filename) {
3342         av_log(NULL, AV_LOG_FATAL,
3343                "Argument '%s' provided as input filename, but '%s' was already specified.\n",
3344                 filename, input_filename);
3345         exit(1);
3346     }
3347     if (!strcmp(filename, "-"))
3348         filename = "pipe:";
3349     input_filename = filename;
3350 }
3351
3352 static int opt_codec(void *optctx, const char *opt, const char *arg)
3353 {
3354    const char *spec = strchr(opt, ':');
3355    if (!spec) {
3356        av_log(NULL, AV_LOG_ERROR,
3357               "No media specifier was specified in '%s' in option '%s'\n",
3358                arg, opt);
3359        return AVERROR(EINVAL);
3360    }
3361    spec++;
3362    switch (spec[0]) {
3363    case 'a' :    audio_codec_name = arg; break;
3364    case 's' : subtitle_codec_name = arg; break;
3365    case 'v' :    video_codec_name = arg; break;
3366    default:
3367        av_log(NULL, AV_LOG_ERROR,
3368               "Invalid media specifier '%s' in option '%s'\n", spec, opt);
3369        return AVERROR(EINVAL);
3370    }
3371    return 0;
3372 }
3373
3374 static int dummy;
3375
3376 static const OptionDef options[] = {
3377 #include "cmdutils_common_opts.h"
3378     { "x", HAS_ARG, { .func_arg = opt_width }, "force displayed width", "width" },
3379     { "y", HAS_ARG, { .func_arg = opt_height }, "force displayed height", "height" },
3380     { "s", HAS_ARG | OPT_VIDEO, { .func_arg = opt_frame_size }, "set frame size (WxH or abbreviation)", "size" },
3381     { "fs", OPT_BOOL, { &is_full_screen }, "force full screen" },
3382     { "an", OPT_BOOL, { &audio_disable }, "disable audio" },
3383     { "vn", OPT_BOOL, { &video_disable }, "disable video" },
3384     { "sn", OPT_BOOL, { &subtitle_disable }, "disable subtitling" },
3385     { "ast", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_AUDIO] }, "select desired audio stream", "stream_number" },
3386     { "vst", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_VIDEO] }, "select desired video stream", "stream_number" },
3387     { "sst", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_SUBTITLE] }, "select desired subtitle stream", "stream_number" },
3388     { "ss", HAS_ARG, { .func_arg = opt_seek }, "seek to a given position in seconds", "pos" },
3389     { "t", HAS_ARG, { .func_arg = opt_duration }, "play  \"duration\" seconds of audio/video", "duration" },
3390     { "bytes", OPT_INT | HAS_ARG, { &seek_by_bytes }, "seek by bytes 0=off 1=on -1=auto", "val" },
3391     { "nodisp", OPT_BOOL, { &display_disable }, "disable graphical display" },
3392     { "f", HAS_ARG, { .func_arg = opt_format }, "force format", "fmt" },
3393     { "pix_fmt", HAS_ARG | OPT_EXPERT | OPT_VIDEO, { .func_arg = opt_frame_pix_fmt }, "set pixel format", "format" },
3394     { "stats", OPT_BOOL | OPT_EXPERT, { &show_status }, "show status", "" },
3395     { "bug", OPT_INT | HAS_ARG | OPT_EXPERT, { &workaround_bugs }, "workaround bugs", "" },
3396     { "fast", OPT_BOOL | OPT_EXPERT, { &fast }, "non spec compliant optimizations", "" },
3397     { "genpts", OPT_BOOL | OPT_EXPERT, { &genpts }, "generate pts", "" },
3398     { "drp", OPT_INT | HAS_ARG | OPT_EXPERT, { &decoder_reorder_pts }, "let decoder reorder pts 0=off 1=on -1=auto", ""},
3399     { "lowres", OPT_INT | HAS_ARG | OPT_EXPERT, { &lowres }, "", "" },
3400     { "idct", OPT_INT | HAS_ARG | OPT_EXPERT, { &idct }, "set idct algo",  "algo" },
3401     { "ec", OPT_INT | HAS_ARG | OPT_EXPERT, { &error_concealment }, "set error concealment options",  "bit_mask" },
3402     { "sync", HAS_ARG | OPT_EXPERT, { .func_arg = opt_sync }, "set audio-video sync. type (type=audio/video/ext)", "type" },
3403     { "autoexit", OPT_BOOL | OPT_EXPERT, { &autoexit }, "exit at the end", "" },
3404     { "exitonkeydown", OPT_BOOL | OPT_EXPERT, { &exit_on_keydown }, "exit on key down", "" },
3405     { "exitonmousedown", OPT_BOOL | OPT_EXPERT, { &exit_on_mousedown }, "exit on mouse down", "" },
3406     { "loop", OPT_INT | HAS_ARG | OPT_EXPERT, { &loop }, "set number of times the playback shall be looped", "loop count" },
3407     { "framedrop", OPT_BOOL | OPT_EXPERT, { &framedrop }, "drop frames when cpu is too slow", "" },
3408     { "infbuf", OPT_BOOL | OPT_EXPERT, { &infinite_buffer }, "don't limit the input buffer size (useful with realtime streams)", "" },
3409     { "window_title", OPT_STRING | HAS_ARG, { &window_title }, "set window title", "window title" },
3410 #if CONFIG_AVFILTER
3411     { "vf", OPT_STRING | HAS_ARG, { &vfilters }, "set video filters", "filter_graph" },
3412     { "af", OPT_STRING | HAS_ARG, { &afilters }, "set audio filters", "filter_graph" },
3413 #endif
3414     { "rdftspeed", OPT_INT | HAS_ARG| OPT_AUDIO | OPT_EXPERT, { &rdftspeed }, "rdft speed", "msecs" },
3415     { "showmode", HAS_ARG, { .func_arg = opt_show_mode}, "select show mode (0 = video, 1 = waves, 2 = RDFT)", "mode" },
3416     { "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, { .func_arg = opt_default }, "generic catch all option", "" },
3417     { "i", OPT_BOOL, { &dummy}, "read specified file", "input_file"},
3418     { "codec", HAS_ARG, { .func_arg = opt_codec}, "force decoder", "decoder_name" },
3419     { "acodec", HAS_ARG | OPT_STRING | OPT_EXPERT, {    &audio_codec_name }, "force audio decoder",    "decoder_name" },
3420     { "scodec", HAS_ARG | OPT_STRING | OPT_EXPERT, { &subtitle_codec_name }, "force subtitle decoder", "decoder_name" },
3421     { "vcodec", HAS_ARG | OPT_STRING | OPT_EXPERT, {    &video_codec_name }, "force video decoder",    "decoder_name" },
3422     { NULL, },
3423 };
3424
3425 static void show_usage(void)
3426 {
3427     av_log(NULL, AV_LOG_INFO, "Simple media player\n");
3428     av_log(NULL, AV_LOG_INFO, "usage: %s [options] input_file\n", program_name);
3429     av_log(NULL, AV_LOG_INFO, "\n");
3430 }
3431
3432 void show_help_default(const char *opt, const char *arg)
3433 {
3434     av_log_set_callback(log_callback_help);
3435     show_usage();
3436     show_help_options(options, "Main options:", 0, OPT_EXPERT, 0);
3437     show_help_options(options, "Advanced options:", OPT_EXPERT, 0, 0);
3438     printf("\n");
3439     show_help_children(avcodec_get_class(), AV_OPT_FLAG_DECODING_PARAM);
3440     show_help_children(avformat_get_class(), AV_OPT_FLAG_DECODING_PARAM);
3441 #if !CONFIG_AVFILTER
3442     show_help_children(sws_get_class(), AV_OPT_FLAG_ENCODING_PARAM);
3443 #else
3444     show_help_children(avfilter_get_class(), AV_OPT_FLAG_FILTERING_PARAM);
3445 #endif
3446     printf("\nWhile playing:\n"
3447            "q, ESC              quit\n"
3448            "f                   toggle full screen\n"
3449            "p, SPC              pause\n"
3450            "a                   cycle audio channel\n"
3451            "v                   cycle video channel\n"
3452            "t                   cycle subtitle channel\n"
3453            "w                   show audio waves\n"
3454            "s                   activate frame-step mode\n"
3455            "left/right          seek backward/forward 10 seconds\n"
3456            "down/up             seek backward/forward 1 minute\n"
3457            "page down/page up   seek backward/forward 10 minutes\n"
3458            "mouse click         seek to percentage in file corresponding to fraction of width\n"
3459            );
3460 }
3461
3462 static int lockmgr(void **mtx, enum AVLockOp op)
3463 {
3464    switch(op) {
3465       case AV_LOCK_CREATE:
3466           *mtx = SDL_CreateMutex();
3467           if(!*mtx)
3468               return 1;
3469           return 0;
3470       case AV_LOCK_OBTAIN:
3471           return !!SDL_LockMutex(*mtx);
3472       case AV_LOCK_RELEASE:
3473           return !!SDL_UnlockMutex(*mtx);
3474       case AV_LOCK_DESTROY:
3475           SDL_DestroyMutex(*mtx);
3476           return 0;
3477    }
3478    return 1;
3479 }
3480
3481 /* Called from the main */
3482 int main(int argc, char **argv)
3483 {
3484     int flags;
3485     VideoState *is;
3486     char dummy_videodriver[] = "SDL_VIDEODRIVER=dummy";
3487
3488     av_log_set_flags(AV_LOG_SKIP_REPEATED);
3489     parse_loglevel(argc, argv, options);
3490
3491     /* register all codecs, demux and protocols */
3492     avcodec_register_all();
3493 #if CONFIG_AVDEVICE
3494     avdevice_register_all();
3495 #endif
3496 #if CONFIG_AVFILTER
3497     avfilter_register_all();
3498 #endif
3499     av_register_all();
3500     avformat_network_init();
3501
3502     init_opts();
3503
3504     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
3505     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
3506
3507     show_banner(argc, argv, options);
3508
3509     parse_options(NULL, argc, argv, options, opt_input_file);
3510
3511     if (!input_filename) {
3512         show_usage();
3513         av_log(NULL, AV_LOG_FATAL, "An input file must be specified\n");
3514         av_log(NULL, AV_LOG_FATAL,
3515                "Use -h to get full help or, even better, run 'man %s'\n", program_name);
3516         exit(1);
3517     }
3518
3519     if (display_disable) {
3520         video_disable = 1;
3521     }
3522     flags = SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER;
3523     if (audio_disable)
3524         flags &= ~SDL_INIT_AUDIO;
3525     if (display_disable)
3526         SDL_putenv(dummy_videodriver); /* For the event queue, we always need a video driver. */
3527 #if !defined(__MINGW32__) && !defined(__APPLE__)
3528     flags |= SDL_INIT_EVENTTHREAD; /* Not supported on Windows or Mac OS X */
3529 #endif
3530     if (SDL_Init (flags)) {
3531         av_log(NULL, AV_LOG_FATAL, "Could not initialize SDL - %s\n", SDL_GetError());
3532         av_log(NULL, AV_LOG_FATAL, "(Did you set the DISPLAY variable?)\n");
3533         exit(1);
3534     }
3535
3536     if (!display_disable) {
3537         const SDL_VideoInfo *vi = SDL_GetVideoInfo();
3538         fs_screen_width = vi->current_w;
3539         fs_screen_height = vi->current_h;
3540     }
3541
3542     SDL_EventState(SDL_ACTIVEEVENT, SDL_IGNORE);
3543     SDL_EventState(SDL_SYSWMEVENT, SDL_IGNORE);
3544     SDL_EventState(SDL_USEREVENT, SDL_IGNORE);
3545
3546     if (av_lockmgr_register(lockmgr)) {
3547         av_log(NULL, AV_LOG_FATAL, "Could not initialize lock manager!\n");
3548         do_exit(NULL);
3549     }
3550
3551     av_init_packet(&flush_pkt);
3552     flush_pkt.data = (uint8_t *)&flush_pkt;
3553
3554     is = stream_open(input_filename, file_iformat);
3555     if (!is) {
3556         av_log(NULL, AV_LOG_FATAL, "Failed to initialize VideoState!\n");
3557         do_exit(NULL);
3558     }
3559
3560     event_loop(is);
3561
3562     /* never returns */
3563
3564     return 0;
3565 }