ffplay: use start_time as next audio pts on flush when seeking is not supported
[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     int64_t audio_frame_next_pts;
220
221     enum ShowMode {
222         SHOW_MODE_NONE = -1, SHOW_MODE_VIDEO = 0, SHOW_MODE_WAVES, SHOW_MODE_RDFT, SHOW_MODE_NB
223     } show_mode;
224     int16_t sample_array[SAMPLE_ARRAY_SIZE];
225     int sample_array_index;
226     int last_i_start;
227     RDFTContext *rdft;
228     int rdft_bits;
229     FFTSample *rdft_data;
230     int xpos;
231     double last_vis_time;
232
233     SDL_Thread *subtitle_tid;
234     int subtitle_stream;
235     AVStream *subtitle_st;
236     PacketQueue subtitleq;
237     SubPicture subpq[SUBPICTURE_QUEUE_SIZE];
238     int subpq_size, subpq_rindex, subpq_windex;
239     SDL_mutex *subpq_mutex;
240     SDL_cond *subpq_cond;
241
242     double frame_timer;
243     double frame_last_pts;
244     double frame_last_duration;
245     double frame_last_dropped_pts;
246     double frame_last_returned_time;
247     double frame_last_filter_delay;
248     int64_t frame_last_dropped_pos;
249     int frame_last_dropped_serial;
250     int video_stream;
251     AVStream *video_st;
252     PacketQueue videoq;
253     int64_t video_current_pos;      // current displayed file pos
254     double max_frame_duration;      // maximum duration of a frame - above this, we consider the jump a timestamp discontinuity
255     VideoPicture pictq[VIDEO_PICTURE_QUEUE_SIZE];
256     int pictq_size, pictq_rindex, pictq_windex;
257     SDL_mutex *pictq_mutex;
258     SDL_cond *pictq_cond;
259 #if !CONFIG_AVFILTER
260     struct SwsContext *img_convert_ctx;
261 #endif
262     SDL_Rect last_display_rect;
263
264     char filename[1024];
265     int width, height, xleft, ytop;
266     int step;
267
268 #if CONFIG_AVFILTER
269     AVFilterContext *in_video_filter;   // the first filter in the video chain
270     AVFilterContext *out_video_filter;  // the last filter in the video chain
271     AVFilterContext *in_audio_filter;   // the first filter in the audio chain
272     AVFilterContext *out_audio_filter;  // the last filter in the audio chain
273     AVFilterGraph *agraph;              // audio filter graph
274 #endif
275
276     int last_video_stream, last_audio_stream, last_subtitle_stream;
277
278     SDL_cond *continue_read_thread;
279 } VideoState;
280
281 /* options specified by the user */
282 static AVInputFormat *file_iformat;
283 static const char *input_filename;
284 static const char *window_title;
285 static int fs_screen_width;
286 static int fs_screen_height;
287 static int default_width  = 640;
288 static int default_height = 480;
289 static int screen_width  = 0;
290 static int screen_height = 0;
291 static int audio_disable;
292 static int video_disable;
293 static int subtitle_disable;
294 static int wanted_stream[AVMEDIA_TYPE_NB] = {
295     [AVMEDIA_TYPE_AUDIO]    = -1,
296     [AVMEDIA_TYPE_VIDEO]    = -1,
297     [AVMEDIA_TYPE_SUBTITLE] = -1,
298 };
299 static int seek_by_bytes = -1;
300 static int display_disable;
301 static int show_status = 1;
302 static int av_sync_type = AV_SYNC_AUDIO_MASTER;
303 static int64_t start_time = AV_NOPTS_VALUE;
304 static int64_t duration = AV_NOPTS_VALUE;
305 static int workaround_bugs = 1;
306 static int fast = 0;
307 static int genpts = 0;
308 static int lowres = 0;
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 wanted_nb_samples;
2133     AVRational tb;
2134     int ret;
2135     int reconfigure;
2136
2137     for (;;) {
2138         /* NOTE: the audio packet can contain several frames */
2139         while (pkt_temp->stream_index != -1 || is->audio_buf_frames_pending) {
2140             if (!is->frame) {
2141                 if (!(is->frame = avcodec_alloc_frame()))
2142                     return AVERROR(ENOMEM);
2143             } else {
2144                 av_frame_unref(is->frame);
2145                 avcodec_get_frame_defaults(is->frame);
2146             }
2147
2148             if (is->audioq.serial != is->audio_pkt_temp_serial)
2149                 break;
2150
2151             if (is->paused)
2152                 return -1;
2153
2154             if (!is->audio_buf_frames_pending) {
2155                 len1 = avcodec_decode_audio4(dec, is->frame, &got_frame, pkt_temp);
2156                 if (len1 < 0) {
2157                     /* if error, we skip the frame */
2158                     pkt_temp->size = 0;
2159                     break;
2160                 }
2161
2162                 pkt_temp->dts =
2163                 pkt_temp->pts = AV_NOPTS_VALUE;
2164                 pkt_temp->data += len1;
2165                 pkt_temp->size -= len1;
2166                 if (pkt_temp->data && pkt_temp->size <= 0 || !pkt_temp->data && !got_frame)
2167                     pkt_temp->stream_index = -1;
2168
2169                 if (!got_frame)
2170                     continue;
2171
2172                 tb = (AVRational){1, is->frame->sample_rate};
2173                 if (is->frame->pts != AV_NOPTS_VALUE)
2174                     is->frame->pts = av_rescale_q(is->frame->pts, dec->time_base, tb);
2175                 else if (is->frame->pkt_pts != AV_NOPTS_VALUE)
2176                     is->frame->pts = av_rescale_q(is->frame->pkt_pts, is->audio_st->time_base, tb);
2177                 else if (is->audio_frame_next_pts != AV_NOPTS_VALUE)
2178                     is->frame->pts = av_rescale_q(is->audio_frame_next_pts, (AVRational){1, is->audio_filter_src.freq}, tb);
2179
2180                 if (is->frame->pts != AV_NOPTS_VALUE)
2181                     is->audio_frame_next_pts = is->frame->pts + is->frame->nb_samples;
2182
2183 #if CONFIG_AVFILTER
2184                 dec_channel_layout = get_valid_channel_layout(is->frame->channel_layout, av_frame_get_channels(is->frame));
2185
2186                 reconfigure =
2187                     cmp_audio_fmts(is->audio_filter_src.fmt, is->audio_filter_src.channels,
2188                                    is->frame->format, av_frame_get_channels(is->frame))    ||
2189                     is->audio_filter_src.channel_layout != dec_channel_layout ||
2190                     is->audio_filter_src.freq           != is->frame->sample_rate ||
2191                     is->audio_pkt_temp_serial           != is->audio_last_serial;
2192
2193                 if (reconfigure) {
2194                     char buf1[1024], buf2[1024];
2195                     av_get_channel_layout_string(buf1, sizeof(buf1), -1, is->audio_filter_src.channel_layout);
2196                     av_get_channel_layout_string(buf2, sizeof(buf2), -1, dec_channel_layout);
2197                     av_log(NULL, AV_LOG_DEBUG,
2198                            "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",
2199                            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,
2200                            is->frame->sample_rate, av_frame_get_channels(is->frame), av_get_sample_fmt_name(is->frame->format), buf2, is->audio_pkt_temp_serial);
2201
2202                     is->audio_filter_src.fmt            = is->frame->format;
2203                     is->audio_filter_src.channels       = av_frame_get_channels(is->frame);
2204                     is->audio_filter_src.channel_layout = dec_channel_layout;
2205                     is->audio_filter_src.freq           = is->frame->sample_rate;
2206                     is->audio_last_serial               = is->audio_pkt_temp_serial;
2207
2208                     if ((ret = configure_audio_filters(is, afilters, 1)) < 0)
2209                         return ret;
2210                 }
2211
2212                 if ((ret = av_buffersrc_add_frame(is->in_audio_filter, is->frame)) < 0)
2213                     return ret;
2214                 av_frame_unref(is->frame);
2215 #endif
2216             }
2217 #if CONFIG_AVFILTER
2218             if ((ret = av_buffersink_get_frame_flags(is->out_audio_filter, is->frame, 0)) < 0) {
2219                 if (ret == AVERROR(EAGAIN)) {
2220                     is->audio_buf_frames_pending = 0;
2221                     continue;
2222                 }
2223                 return ret;
2224             }
2225             is->audio_buf_frames_pending = 1;
2226             tb = is->out_audio_filter->inputs[0]->time_base;
2227 #endif
2228
2229             data_size = av_samples_get_buffer_size(NULL, av_frame_get_channels(is->frame),
2230                                                    is->frame->nb_samples,
2231                                                    is->frame->format, 1);
2232
2233             dec_channel_layout =
2234                 (is->frame->channel_layout && av_frame_get_channels(is->frame) == av_get_channel_layout_nb_channels(is->frame->channel_layout)) ?
2235                 is->frame->channel_layout : av_get_default_channel_layout(av_frame_get_channels(is->frame));
2236             wanted_nb_samples = synchronize_audio(is, is->frame->nb_samples);
2237
2238             if (is->frame->format        != is->audio_src.fmt            ||
2239                 dec_channel_layout       != is->audio_src.channel_layout ||
2240                 is->frame->sample_rate   != is->audio_src.freq           ||
2241                 (wanted_nb_samples       != is->frame->nb_samples && !is->swr_ctx)) {
2242                 swr_free(&is->swr_ctx);
2243                 is->swr_ctx = swr_alloc_set_opts(NULL,
2244                                                  is->audio_tgt.channel_layout, is->audio_tgt.fmt, is->audio_tgt.freq,
2245                                                  dec_channel_layout,           is->frame->format, is->frame->sample_rate,
2246                                                  0, NULL);
2247                 if (!is->swr_ctx || swr_init(is->swr_ctx) < 0) {
2248                     av_log(NULL, AV_LOG_ERROR,
2249                            "Cannot create sample rate converter for conversion of %d Hz %s %d channels to %d Hz %s %d channels!\n",
2250                             is->frame->sample_rate, av_get_sample_fmt_name(is->frame->format), av_frame_get_channels(is->frame),
2251                             is->audio_tgt.freq, av_get_sample_fmt_name(is->audio_tgt.fmt), is->audio_tgt.channels);
2252                     break;
2253                 }
2254                 is->audio_src.channel_layout = dec_channel_layout;
2255                 is->audio_src.channels       = av_frame_get_channels(is->frame);
2256                 is->audio_src.freq = is->frame->sample_rate;
2257                 is->audio_src.fmt = is->frame->format;
2258             }
2259
2260             if (is->swr_ctx) {
2261                 const uint8_t **in = (const uint8_t **)is->frame->extended_data;
2262                 uint8_t **out = &is->audio_buf1;
2263                 int out_count = (int64_t)wanted_nb_samples * is->audio_tgt.freq / is->frame->sample_rate + 256;
2264                 int out_size  = av_samples_get_buffer_size(NULL, is->audio_tgt.channels, out_count, is->audio_tgt.fmt, 0);
2265                 int len2;
2266                 if (out_size < 0) {
2267                     av_log(NULL, AV_LOG_ERROR, "av_samples_get_buffer_size() failed\n");
2268                     break;
2269                 }
2270                 if (wanted_nb_samples != is->frame->nb_samples) {
2271                     if (swr_set_compensation(is->swr_ctx, (wanted_nb_samples - is->frame->nb_samples) * is->audio_tgt.freq / is->frame->sample_rate,
2272                                                 wanted_nb_samples * is->audio_tgt.freq / is->frame->sample_rate) < 0) {
2273                         av_log(NULL, AV_LOG_ERROR, "swr_set_compensation() failed\n");
2274                         break;
2275                     }
2276                 }
2277                 av_fast_malloc(&is->audio_buf1, &is->audio_buf1_size, out_size);
2278                 if (!is->audio_buf1)
2279                     return AVERROR(ENOMEM);
2280                 len2 = swr_convert(is->swr_ctx, out, out_count, in, is->frame->nb_samples);
2281                 if (len2 < 0) {
2282                     av_log(NULL, AV_LOG_ERROR, "swr_convert() failed\n");
2283                     break;
2284                 }
2285                 if (len2 == out_count) {
2286                     av_log(NULL, AV_LOG_WARNING, "audio buffer is probably too small\n");
2287                     swr_init(is->swr_ctx);
2288                 }
2289                 is->audio_buf = is->audio_buf1;
2290                 resampled_data_size = len2 * is->audio_tgt.channels * av_get_bytes_per_sample(is->audio_tgt.fmt);
2291             } else {
2292                 is->audio_buf = is->frame->data[0];
2293                 resampled_data_size = data_size;
2294             }
2295
2296             audio_clock0 = is->audio_clock;
2297             /* update the audio clock with the pts */
2298             if (is->frame->pts != AV_NOPTS_VALUE)
2299                 is->audio_clock = is->frame->pts * av_q2d(tb) + (double) is->frame->nb_samples / is->frame->sample_rate;
2300             else
2301                 is->audio_clock = NAN;
2302             is->audio_clock_serial = is->audio_pkt_temp_serial;
2303 #ifdef DEBUG
2304             {
2305                 static double last_clock;
2306                 printf("audio: delay=%0.3f clock=%0.3f clock0=%0.3f\n",
2307                        is->audio_clock - last_clock,
2308                        is->audio_clock, audio_clock0);
2309                 last_clock = is->audio_clock;
2310             }
2311 #endif
2312             return resampled_data_size;
2313         }
2314
2315         /* free the current packet */
2316         if (pkt->data)
2317             av_free_packet(pkt);
2318         memset(pkt_temp, 0, sizeof(*pkt_temp));
2319         pkt_temp->stream_index = -1;
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 ((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             is->audio_buf_frames_pending = 0;
2335             is->audio_frame_next_pts = AV_NOPTS_VALUE;
2336             if ((is->ic->iformat->flags & (AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK)) && !is->ic->iformat->read_seek)
2337                 is->audio_frame_next_pts = is->audio_st->start_time;
2338         }
2339
2340         *pkt_temp = *pkt;
2341     }
2342 }
2343
2344 /* prepare a new audio buffer */
2345 static void sdl_audio_callback(void *opaque, Uint8 *stream, int len)
2346 {
2347     VideoState *is = opaque;
2348     int audio_size, len1;
2349     int bytes_per_sec;
2350     int frame_size = av_samples_get_buffer_size(NULL, is->audio_tgt.channels, 1, is->audio_tgt.fmt, 1);
2351
2352     audio_callback_time = av_gettime();
2353
2354     while (len > 0) {
2355         if (is->audio_buf_index >= is->audio_buf_size) {
2356            audio_size = audio_decode_frame(is);
2357            if (audio_size < 0) {
2358                 /* if error, just output silence */
2359                is->audio_buf      = is->silence_buf;
2360                is->audio_buf_size = sizeof(is->silence_buf) / frame_size * frame_size;
2361            } else {
2362                if (is->show_mode != SHOW_MODE_VIDEO)
2363                    update_sample_display(is, (int16_t *)is->audio_buf, audio_size);
2364                is->audio_buf_size = audio_size;
2365            }
2366            is->audio_buf_index = 0;
2367         }
2368         len1 = is->audio_buf_size - is->audio_buf_index;
2369         if (len1 > len)
2370             len1 = len;
2371         memcpy(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, len1);
2372         len -= len1;
2373         stream += len1;
2374         is->audio_buf_index += len1;
2375     }
2376     bytes_per_sec = is->audio_tgt.freq * is->audio_tgt.channels * av_get_bytes_per_sample(is->audio_tgt.fmt);
2377     is->audio_write_buf_size = is->audio_buf_size - is->audio_buf_index;
2378     /* Let's assume the audio driver that is used by SDL has two periods. */
2379     if (!isnan(is->audio_clock)) {
2380         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);
2381         sync_clock_to_slave(&is->extclk, &is->audclk);
2382     }
2383 }
2384
2385 static int audio_open(void *opaque, int64_t wanted_channel_layout, int wanted_nb_channels, int wanted_sample_rate, struct AudioParams *audio_hw_params)
2386 {
2387     SDL_AudioSpec wanted_spec, spec;
2388     const char *env;
2389     const int next_nb_channels[] = {0, 0, 1, 6, 2, 6, 4, 6};
2390
2391     env = SDL_getenv("SDL_AUDIO_CHANNELS");
2392     if (env) {
2393         wanted_nb_channels = atoi(env);
2394         wanted_channel_layout = av_get_default_channel_layout(wanted_nb_channels);
2395     }
2396     if (!wanted_channel_layout || wanted_nb_channels != av_get_channel_layout_nb_channels(wanted_channel_layout)) {
2397         wanted_channel_layout = av_get_default_channel_layout(wanted_nb_channels);
2398         wanted_channel_layout &= ~AV_CH_LAYOUT_STEREO_DOWNMIX;
2399     }
2400     wanted_spec.channels = av_get_channel_layout_nb_channels(wanted_channel_layout);
2401     wanted_spec.freq = wanted_sample_rate;
2402     if (wanted_spec.freq <= 0 || wanted_spec.channels <= 0) {
2403         av_log(NULL, AV_LOG_ERROR, "Invalid sample rate or channel count!\n");
2404         return -1;
2405     }
2406     wanted_spec.format = AUDIO_S16SYS;
2407     wanted_spec.silence = 0;
2408     wanted_spec.samples = SDL_AUDIO_BUFFER_SIZE;
2409     wanted_spec.callback = sdl_audio_callback;
2410     wanted_spec.userdata = opaque;
2411     while (SDL_OpenAudio(&wanted_spec, &spec) < 0) {
2412         av_log(NULL, AV_LOG_WARNING, "SDL_OpenAudio (%d channels): %s\n", wanted_spec.channels, SDL_GetError());
2413         wanted_spec.channels = next_nb_channels[FFMIN(7, wanted_spec.channels)];
2414         if (!wanted_spec.channels) {
2415             av_log(NULL, AV_LOG_ERROR,
2416                    "No more channel combinations to try, audio open failed\n");
2417             return -1;
2418         }
2419         wanted_channel_layout = av_get_default_channel_layout(wanted_spec.channels);
2420     }
2421     if (spec.format != AUDIO_S16SYS) {
2422         av_log(NULL, AV_LOG_ERROR,
2423                "SDL advised audio format %d is not supported!\n", spec.format);
2424         return -1;
2425     }
2426     if (spec.channels != wanted_spec.channels) {
2427         wanted_channel_layout = av_get_default_channel_layout(spec.channels);
2428         if (!wanted_channel_layout) {
2429             av_log(NULL, AV_LOG_ERROR,
2430                    "SDL advised channel count %d is not supported!\n", spec.channels);
2431             return -1;
2432         }
2433     }
2434
2435     audio_hw_params->fmt = AV_SAMPLE_FMT_S16;
2436     audio_hw_params->freq = spec.freq;
2437     audio_hw_params->channel_layout = wanted_channel_layout;
2438     audio_hw_params->channels =  spec.channels;
2439     return spec.size;
2440 }
2441
2442 /* open a given stream. Return 0 if OK */
2443 static int stream_component_open(VideoState *is, int stream_index)
2444 {
2445     AVFormatContext *ic = is->ic;
2446     AVCodecContext *avctx;
2447     AVCodec *codec;
2448     const char *forced_codec_name = NULL;
2449     AVDictionary *opts;
2450     AVDictionaryEntry *t = NULL;
2451     int sample_rate, nb_channels;
2452     int64_t channel_layout;
2453     int ret;
2454
2455     if (stream_index < 0 || stream_index >= ic->nb_streams)
2456         return -1;
2457     avctx = ic->streams[stream_index]->codec;
2458
2459     codec = avcodec_find_decoder(avctx->codec_id);
2460
2461     switch(avctx->codec_type){
2462         case AVMEDIA_TYPE_AUDIO   : is->last_audio_stream    = stream_index; forced_codec_name =    audio_codec_name; break;
2463         case AVMEDIA_TYPE_SUBTITLE: is->last_subtitle_stream = stream_index; forced_codec_name = subtitle_codec_name; break;
2464         case AVMEDIA_TYPE_VIDEO   : is->last_video_stream    = stream_index; forced_codec_name =    video_codec_name; break;
2465     }
2466     if (forced_codec_name)
2467         codec = avcodec_find_decoder_by_name(forced_codec_name);
2468     if (!codec) {
2469         if (forced_codec_name) av_log(NULL, AV_LOG_WARNING,
2470                                       "No codec could be found with name '%s'\n", forced_codec_name);
2471         else                   av_log(NULL, AV_LOG_WARNING,
2472                                       "No codec could be found with id %d\n", avctx->codec_id);
2473         return -1;
2474     }
2475
2476     avctx->codec_id = codec->id;
2477     avctx->workaround_bugs   = workaround_bugs;
2478     avctx->lowres            = lowres;
2479     if(avctx->lowres > codec->max_lowres){
2480         av_log(avctx, AV_LOG_WARNING, "The maximum value for lowres supported by the decoder is %d\n",
2481                 codec->max_lowres);
2482         avctx->lowres= codec->max_lowres;
2483     }
2484     avctx->error_concealment = error_concealment;
2485
2486     if(avctx->lowres) avctx->flags |= CODEC_FLAG_EMU_EDGE;
2487     if (fast)   avctx->flags2 |= CODEC_FLAG2_FAST;
2488     if(codec->capabilities & CODEC_CAP_DR1)
2489         avctx->flags |= CODEC_FLAG_EMU_EDGE;
2490
2491     opts = filter_codec_opts(codec_opts, avctx->codec_id, ic, ic->streams[stream_index], codec);
2492     if (!av_dict_get(opts, "threads", NULL, 0))
2493         av_dict_set(&opts, "threads", "auto", 0);
2494     if (avctx->lowres)
2495         av_dict_set(&opts, "lowres", av_asprintf("%d", avctx->lowres), AV_DICT_DONT_STRDUP_VAL);
2496     if (avctx->codec_type == AVMEDIA_TYPE_VIDEO || avctx->codec_type == AVMEDIA_TYPE_AUDIO)
2497         av_dict_set(&opts, "refcounted_frames", "1", 0);
2498     if (avcodec_open2(avctx, codec, &opts) < 0)
2499         return -1;
2500     if ((t = av_dict_get(opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2501         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2502         return AVERROR_OPTION_NOT_FOUND;
2503     }
2504
2505     ic->streams[stream_index]->discard = AVDISCARD_DEFAULT;
2506     switch (avctx->codec_type) {
2507     case AVMEDIA_TYPE_AUDIO:
2508 #if CONFIG_AVFILTER
2509         {
2510             AVFilterLink *link;
2511
2512             is->audio_filter_src.freq           = avctx->sample_rate;
2513             is->audio_filter_src.channels       = avctx->channels;
2514             is->audio_filter_src.channel_layout = get_valid_channel_layout(avctx->channel_layout, avctx->channels);
2515             is->audio_filter_src.fmt            = avctx->sample_fmt;
2516             if ((ret = configure_audio_filters(is, afilters, 0)) < 0)
2517                 return ret;
2518             link = is->out_audio_filter->inputs[0];
2519             sample_rate    = link->sample_rate;
2520             nb_channels    = link->channels;
2521             channel_layout = link->channel_layout;
2522         }
2523 #else
2524         sample_rate    = avctx->sample_rate;
2525         nb_channels    = avctx->channels;
2526         channel_layout = avctx->channel_layout;
2527 #endif
2528
2529         /* prepare audio output */
2530         if ((ret = audio_open(is, channel_layout, nb_channels, sample_rate, &is->audio_tgt)) < 0)
2531             return ret;
2532         is->audio_hw_buf_size = ret;
2533         is->audio_src = is->audio_tgt;
2534         is->audio_buf_size  = 0;
2535         is->audio_buf_index = 0;
2536
2537         /* init averaging filter */
2538         is->audio_diff_avg_coef  = exp(log(0.01) / AUDIO_DIFF_AVG_NB);
2539         is->audio_diff_avg_count = 0;
2540         /* since we do not have a precise anough audio fifo fullness,
2541            we correct audio sync only if larger than this threshold */
2542         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);
2543
2544         memset(&is->audio_pkt, 0, sizeof(is->audio_pkt));
2545         memset(&is->audio_pkt_temp, 0, sizeof(is->audio_pkt_temp));
2546         is->audio_pkt_temp.stream_index = -1;
2547
2548         is->audio_stream = stream_index;
2549         is->audio_st = ic->streams[stream_index];
2550
2551         packet_queue_start(&is->audioq);
2552         SDL_PauseAudio(0);
2553         break;
2554     case AVMEDIA_TYPE_VIDEO:
2555         is->video_stream = stream_index;
2556         is->video_st = ic->streams[stream_index];
2557
2558         packet_queue_start(&is->videoq);
2559         is->video_tid = SDL_CreateThread(video_thread, is);
2560         is->queue_attachments_req = 1;
2561         break;
2562     case AVMEDIA_TYPE_SUBTITLE:
2563         is->subtitle_stream = stream_index;
2564         is->subtitle_st = ic->streams[stream_index];
2565         packet_queue_start(&is->subtitleq);
2566
2567         is->subtitle_tid = SDL_CreateThread(subtitle_thread, is);
2568         break;
2569     default:
2570         break;
2571     }
2572     return 0;
2573 }
2574
2575 static void stream_component_close(VideoState *is, int stream_index)
2576 {
2577     AVFormatContext *ic = is->ic;
2578     AVCodecContext *avctx;
2579
2580     if (stream_index < 0 || stream_index >= ic->nb_streams)
2581         return;
2582     avctx = ic->streams[stream_index]->codec;
2583
2584     switch (avctx->codec_type) {
2585     case AVMEDIA_TYPE_AUDIO:
2586         packet_queue_abort(&is->audioq);
2587
2588         SDL_CloseAudio();
2589
2590         packet_queue_flush(&is->audioq);
2591         av_free_packet(&is->audio_pkt);
2592         swr_free(&is->swr_ctx);
2593         av_freep(&is->audio_buf1);
2594         is->audio_buf1_size = 0;
2595         is->audio_buf = NULL;
2596         av_frame_free(&is->frame);
2597
2598         if (is->rdft) {
2599             av_rdft_end(is->rdft);
2600             av_freep(&is->rdft_data);
2601             is->rdft = NULL;
2602             is->rdft_bits = 0;
2603         }
2604 #if CONFIG_AVFILTER
2605         avfilter_graph_free(&is->agraph);
2606 #endif
2607         break;
2608     case AVMEDIA_TYPE_VIDEO:
2609         packet_queue_abort(&is->videoq);
2610
2611         /* note: we also signal this mutex to make sure we deblock the
2612            video thread in all cases */
2613         SDL_LockMutex(is->pictq_mutex);
2614         SDL_CondSignal(is->pictq_cond);
2615         SDL_UnlockMutex(is->pictq_mutex);
2616
2617         SDL_WaitThread(is->video_tid, NULL);
2618
2619         packet_queue_flush(&is->videoq);
2620         break;
2621     case AVMEDIA_TYPE_SUBTITLE:
2622         packet_queue_abort(&is->subtitleq);
2623
2624         /* note: we also signal this mutex to make sure we deblock the
2625            video thread in all cases */
2626         SDL_LockMutex(is->subpq_mutex);
2627         SDL_CondSignal(is->subpq_cond);
2628         SDL_UnlockMutex(is->subpq_mutex);
2629
2630         SDL_WaitThread(is->subtitle_tid, NULL);
2631
2632         packet_queue_flush(&is->subtitleq);
2633         break;
2634     default:
2635         break;
2636     }
2637
2638     ic->streams[stream_index]->discard = AVDISCARD_ALL;
2639     avcodec_close(avctx);
2640     switch (avctx->codec_type) {
2641     case AVMEDIA_TYPE_AUDIO:
2642         is->audio_st = NULL;
2643         is->audio_stream = -1;
2644         break;
2645     case AVMEDIA_TYPE_VIDEO:
2646         is->video_st = NULL;
2647         is->video_stream = -1;
2648         break;
2649     case AVMEDIA_TYPE_SUBTITLE:
2650         is->subtitle_st = NULL;
2651         is->subtitle_stream = -1;
2652         break;
2653     default:
2654         break;
2655     }
2656 }
2657
2658 static int decode_interrupt_cb(void *ctx)
2659 {
2660     VideoState *is = ctx;
2661     return is->abort_request;
2662 }
2663
2664 static int is_realtime(AVFormatContext *s)
2665 {
2666     if(   !strcmp(s->iformat->name, "rtp")
2667        || !strcmp(s->iformat->name, "rtsp")
2668        || !strcmp(s->iformat->name, "sdp")
2669     )
2670         return 1;
2671
2672     if(s->pb && (   !strncmp(s->filename, "rtp:", 4)
2673                  || !strncmp(s->filename, "udp:", 4)
2674                 )
2675     )
2676         return 1;
2677     return 0;
2678 }
2679
2680 /* this thread gets the stream from the disk or the network */
2681 static int read_thread(void *arg)
2682 {
2683     VideoState *is = arg;
2684     AVFormatContext *ic = NULL;
2685     int err, i, ret;
2686     int st_index[AVMEDIA_TYPE_NB];
2687     AVPacket pkt1, *pkt = &pkt1;
2688     int eof = 0;
2689     int64_t stream_start_time;
2690     int pkt_in_play_range = 0;
2691     AVDictionaryEntry *t;
2692     AVDictionary **opts;
2693     int orig_nb_streams;
2694     SDL_mutex *wait_mutex = SDL_CreateMutex();
2695
2696     memset(st_index, -1, sizeof(st_index));
2697     is->last_video_stream = is->video_stream = -1;
2698     is->last_audio_stream = is->audio_stream = -1;
2699     is->last_subtitle_stream = is->subtitle_stream = -1;
2700
2701     ic = avformat_alloc_context();
2702     ic->interrupt_callback.callback = decode_interrupt_cb;
2703     ic->interrupt_callback.opaque = is;
2704     err = avformat_open_input(&ic, is->filename, is->iformat, &format_opts);
2705     if (err < 0) {
2706         print_error(is->filename, err);
2707         ret = -1;
2708         goto fail;
2709     }
2710     if ((t = av_dict_get(format_opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
2711         av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key);
2712         ret = AVERROR_OPTION_NOT_FOUND;
2713         goto fail;
2714     }
2715     is->ic = ic;
2716
2717     if (genpts)
2718         ic->flags |= AVFMT_FLAG_GENPTS;
2719
2720     opts = setup_find_stream_info_opts(ic, codec_opts);
2721     orig_nb_streams = ic->nb_streams;
2722
2723     err = avformat_find_stream_info(ic, opts);
2724     if (err < 0) {
2725         av_log(NULL, AV_LOG_WARNING,
2726                "%s: could not find codec parameters\n", is->filename);
2727         ret = -1;
2728         goto fail;
2729     }
2730     for (i = 0; i < orig_nb_streams; i++)
2731         av_dict_free(&opts[i]);
2732     av_freep(&opts);
2733
2734     if (ic->pb)
2735         ic->pb->eof_reached = 0; // FIXME hack, ffplay maybe should not use url_feof() to test for the end
2736
2737     if (seek_by_bytes < 0)
2738         seek_by_bytes = !!(ic->iformat->flags & AVFMT_TS_DISCONT) && strcmp("ogg", ic->iformat->name);
2739
2740     is->max_frame_duration = (ic->iformat->flags & AVFMT_TS_DISCONT) ? 10.0 : 3600.0;
2741
2742     if (!window_title && (t = av_dict_get(ic->metadata, "title", NULL, 0)))
2743         window_title = av_asprintf("%s - %s", t->value, input_filename);
2744
2745     /* if seeking requested, we execute it */
2746     if (start_time != AV_NOPTS_VALUE) {
2747         int64_t timestamp;
2748
2749         timestamp = start_time;
2750         /* add the stream start time */
2751         if (ic->start_time != AV_NOPTS_VALUE)
2752             timestamp += ic->start_time;
2753         ret = avformat_seek_file(ic, -1, INT64_MIN, timestamp, INT64_MAX, 0);
2754         if (ret < 0) {
2755             av_log(NULL, AV_LOG_WARNING, "%s: could not seek to position %0.3f\n",
2756                     is->filename, (double)timestamp / AV_TIME_BASE);
2757         }
2758     }
2759
2760     is->realtime = is_realtime(ic);
2761
2762     for (i = 0; i < ic->nb_streams; i++)
2763         ic->streams[i]->discard = AVDISCARD_ALL;
2764     if (!video_disable)
2765         st_index[AVMEDIA_TYPE_VIDEO] =
2766             av_find_best_stream(ic, AVMEDIA_TYPE_VIDEO,
2767                                 wanted_stream[AVMEDIA_TYPE_VIDEO], -1, NULL, 0);
2768     if (!audio_disable)
2769         st_index[AVMEDIA_TYPE_AUDIO] =
2770             av_find_best_stream(ic, AVMEDIA_TYPE_AUDIO,
2771                                 wanted_stream[AVMEDIA_TYPE_AUDIO],
2772                                 st_index[AVMEDIA_TYPE_VIDEO],
2773                                 NULL, 0);
2774     if (!video_disable && !subtitle_disable)
2775         st_index[AVMEDIA_TYPE_SUBTITLE] =
2776             av_find_best_stream(ic, AVMEDIA_TYPE_SUBTITLE,
2777                                 wanted_stream[AVMEDIA_TYPE_SUBTITLE],
2778                                 (st_index[AVMEDIA_TYPE_AUDIO] >= 0 ?
2779                                  st_index[AVMEDIA_TYPE_AUDIO] :
2780                                  st_index[AVMEDIA_TYPE_VIDEO]),
2781                                 NULL, 0);
2782     if (show_status) {
2783         av_dump_format(ic, 0, is->filename, 0);
2784     }
2785
2786     is->show_mode = show_mode;
2787
2788     /* open the streams */
2789     if (st_index[AVMEDIA_TYPE_AUDIO] >= 0) {
2790         stream_component_open(is, st_index[AVMEDIA_TYPE_AUDIO]);
2791     }
2792
2793     ret = -1;
2794     if (st_index[AVMEDIA_TYPE_VIDEO] >= 0) {
2795         ret = stream_component_open(is, st_index[AVMEDIA_TYPE_VIDEO]);
2796     }
2797     if (is->show_mode == SHOW_MODE_NONE)
2798         is->show_mode = ret >= 0 ? SHOW_MODE_VIDEO : SHOW_MODE_RDFT;
2799
2800     if (st_index[AVMEDIA_TYPE_SUBTITLE] >= 0) {
2801         stream_component_open(is, st_index[AVMEDIA_TYPE_SUBTITLE]);
2802     }
2803
2804     if (is->video_stream < 0 && is->audio_stream < 0) {
2805         av_log(NULL, AV_LOG_FATAL, "%s: could not open codecs\n", is->filename);
2806         ret = -1;
2807         goto fail;
2808     }
2809
2810     if (infinite_buffer < 0 && is->realtime)
2811         infinite_buffer = 1;
2812
2813     for (;;) {
2814         if (is->abort_request)
2815             break;
2816         if (is->paused != is->last_paused) {
2817             is->last_paused = is->paused;
2818             if (is->paused)
2819                 is->read_pause_return = av_read_pause(ic);
2820             else
2821                 av_read_play(ic);
2822         }
2823 #if CONFIG_RTSP_DEMUXER || CONFIG_MMSH_PROTOCOL
2824         if (is->paused &&
2825                 (!strcmp(ic->iformat->name, "rtsp") ||
2826                  (ic->pb && !strncmp(input_filename, "mmsh:", 5)))) {
2827             /* wait 10 ms to avoid trying to get another packet */
2828             /* XXX: horrible */
2829             SDL_Delay(10);
2830             continue;
2831         }
2832 #endif
2833         if (is->seek_req) {
2834             int64_t seek_target = is->seek_pos;
2835             int64_t seek_min    = is->seek_rel > 0 ? seek_target - is->seek_rel + 2: INT64_MIN;
2836             int64_t seek_max    = is->seek_rel < 0 ? seek_target - is->seek_rel - 2: INT64_MAX;
2837 // FIXME the +-2 is due to rounding being not done in the correct direction in generation
2838 //      of the seek_pos/seek_rel variables
2839
2840             ret = avformat_seek_file(is->ic, -1, seek_min, seek_target, seek_max, is->seek_flags);
2841             if (ret < 0) {
2842                 av_log(NULL, AV_LOG_ERROR,
2843                        "%s: error while seeking\n", is->ic->filename);
2844             } else {
2845                 if (is->audio_stream >= 0) {
2846                     packet_queue_flush(&is->audioq);
2847                     packet_queue_put(&is->audioq, &flush_pkt);
2848                 }
2849                 if (is->subtitle_stream >= 0) {
2850                     packet_queue_flush(&is->subtitleq);
2851                     packet_queue_put(&is->subtitleq, &flush_pkt);
2852                 }
2853                 if (is->video_stream >= 0) {
2854                     packet_queue_flush(&is->videoq);
2855                     packet_queue_put(&is->videoq, &flush_pkt);
2856                 }
2857                 if (is->seek_flags & AVSEEK_FLAG_BYTE) {
2858                    set_clock(&is->extclk, NAN, 0);
2859                 } else {
2860                    set_clock(&is->extclk, seek_target / (double)AV_TIME_BASE, 0);
2861                 }
2862             }
2863             is->seek_req = 0;
2864             is->queue_attachments_req = 1;
2865             eof = 0;
2866             if (is->paused)
2867                 step_to_next_frame(is);
2868         }
2869         if (is->queue_attachments_req) {
2870             if (is->video_st && is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC) {
2871                 AVPacket copy;
2872                 if ((ret = av_copy_packet(&copy, &is->video_st->attached_pic)) < 0)
2873                     goto fail;
2874                 packet_queue_put(&is->videoq, &copy);
2875             }
2876             is->queue_attachments_req = 0;
2877         }
2878
2879         /* if the queue are full, no need to read more */
2880         if (infinite_buffer<1 &&
2881               (is->audioq.size + is->videoq.size + is->subtitleq.size > MAX_QUEUE_SIZE
2882             || (   (is->audioq   .nb_packets > MIN_FRAMES || is->audio_stream < 0 || is->audioq.abort_request)
2883                 && (is->videoq   .nb_packets > MIN_FRAMES || is->video_stream < 0 || is->videoq.abort_request
2884                     || (is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC))
2885                 && (is->subtitleq.nb_packets > MIN_FRAMES || is->subtitle_stream < 0 || is->subtitleq.abort_request)))) {
2886             /* wait 10 ms */
2887             SDL_LockMutex(wait_mutex);
2888             SDL_CondWaitTimeout(is->continue_read_thread, wait_mutex, 10);
2889             SDL_UnlockMutex(wait_mutex);
2890             continue;
2891         }
2892         if (eof) {
2893             if (is->video_stream >= 0) {
2894                 av_init_packet(pkt);
2895                 pkt->data = NULL;
2896                 pkt->size = 0;
2897                 pkt->stream_index = is->video_stream;
2898                 packet_queue_put(&is->videoq, pkt);
2899             }
2900             if (is->audio_stream >= 0) {
2901                 av_init_packet(pkt);
2902                 pkt->data = NULL;
2903                 pkt->size = 0;
2904                 pkt->stream_index = is->audio_stream;
2905                 packet_queue_put(&is->audioq, pkt);
2906             }
2907             SDL_Delay(10);
2908             if (is->audioq.size + is->videoq.size + is->subtitleq.size == 0) {
2909                 if (loop != 1 && (!loop || --loop)) {
2910                     stream_seek(is, start_time != AV_NOPTS_VALUE ? start_time : 0, 0, 0);
2911                 } else if (autoexit) {
2912                     ret = AVERROR_EOF;
2913                     goto fail;
2914                 }
2915             }
2916             eof=0;
2917             continue;
2918         }
2919         ret = av_read_frame(ic, pkt);
2920         if (ret < 0) {
2921             if (ret == AVERROR_EOF || url_feof(ic->pb))
2922                 eof = 1;
2923             if (ic->pb && ic->pb->error)
2924                 break;
2925             SDL_LockMutex(wait_mutex);
2926             SDL_CondWaitTimeout(is->continue_read_thread, wait_mutex, 10);
2927             SDL_UnlockMutex(wait_mutex);
2928             continue;
2929         }
2930         /* check if packet is in play range specified by user, then queue, otherwise discard */
2931         stream_start_time = ic->streams[pkt->stream_index]->start_time;
2932         pkt_in_play_range = duration == AV_NOPTS_VALUE ||
2933                 (pkt->pts - (stream_start_time != AV_NOPTS_VALUE ? stream_start_time : 0)) *
2934                 av_q2d(ic->streams[pkt->stream_index]->time_base) -
2935                 (double)(start_time != AV_NOPTS_VALUE ? start_time : 0) / 1000000
2936                 <= ((double)duration / 1000000);
2937         if (pkt->stream_index == is->audio_stream && pkt_in_play_range) {
2938             packet_queue_put(&is->audioq, pkt);
2939         } else if (pkt->stream_index == is->video_stream && pkt_in_play_range
2940                    && !(is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
2941             packet_queue_put(&is->videoq, pkt);
2942         } else if (pkt->stream_index == is->subtitle_stream && pkt_in_play_range) {
2943             packet_queue_put(&is->subtitleq, pkt);
2944         } else {
2945             av_free_packet(pkt);
2946         }
2947     }
2948     /* wait until the end */
2949     while (!is->abort_request) {
2950         SDL_Delay(100);
2951     }
2952
2953     ret = 0;
2954  fail:
2955     /* close each stream */
2956     if (is->audio_stream >= 0)
2957         stream_component_close(is, is->audio_stream);
2958     if (is->video_stream >= 0)
2959         stream_component_close(is, is->video_stream);
2960     if (is->subtitle_stream >= 0)
2961         stream_component_close(is, is->subtitle_stream);
2962     if (is->ic) {
2963         avformat_close_input(&is->ic);
2964     }
2965
2966     if (ret != 0) {
2967         SDL_Event event;
2968
2969         event.type = FF_QUIT_EVENT;
2970         event.user.data1 = is;
2971         SDL_PushEvent(&event);
2972     }
2973     SDL_DestroyMutex(wait_mutex);
2974     return 0;
2975 }
2976
2977 static VideoState *stream_open(const char *filename, AVInputFormat *iformat)
2978 {
2979     VideoState *is;
2980
2981     is = av_mallocz(sizeof(VideoState));
2982     if (!is)
2983         return NULL;
2984     av_strlcpy(is->filename, filename, sizeof(is->filename));
2985     is->iformat = iformat;
2986     is->ytop    = 0;
2987     is->xleft   = 0;
2988
2989     /* start video display */
2990     is->pictq_mutex = SDL_CreateMutex();
2991     is->pictq_cond  = SDL_CreateCond();
2992
2993     is->subpq_mutex = SDL_CreateMutex();
2994     is->subpq_cond  = SDL_CreateCond();
2995
2996     packet_queue_init(&is->videoq);
2997     packet_queue_init(&is->audioq);
2998     packet_queue_init(&is->subtitleq);
2999
3000     is->continue_read_thread = SDL_CreateCond();
3001
3002     init_clock(&is->vidclk, &is->videoq.serial);
3003     init_clock(&is->audclk, &is->audioq.serial);
3004     init_clock(&is->extclk, &is->extclk.serial);
3005     is->audio_clock_serial = -1;
3006     is->audio_last_serial = -1;
3007     is->av_sync_type = av_sync_type;
3008     is->read_tid     = SDL_CreateThread(read_thread, is);
3009     if (!is->read_tid) {
3010         av_free(is);
3011         return NULL;
3012     }
3013     return is;
3014 }
3015
3016 static void stream_cycle_channel(VideoState *is, int codec_type)
3017 {
3018     AVFormatContext *ic = is->ic;
3019     int start_index, stream_index;
3020     int old_index;
3021     AVStream *st;
3022
3023     if (codec_type == AVMEDIA_TYPE_VIDEO) {
3024         start_index = is->last_video_stream;
3025         old_index = is->video_stream;
3026     } else if (codec_type == AVMEDIA_TYPE_AUDIO) {
3027         start_index = is->last_audio_stream;
3028         old_index = is->audio_stream;
3029     } else {
3030         start_index = is->last_subtitle_stream;
3031         old_index = is->subtitle_stream;
3032     }
3033     stream_index = start_index;
3034     for (;;) {
3035         if (++stream_index >= is->ic->nb_streams)
3036         {
3037             if (codec_type == AVMEDIA_TYPE_SUBTITLE)
3038             {
3039                 stream_index = -1;
3040                 is->last_subtitle_stream = -1;
3041                 goto the_end;
3042             }
3043             if (start_index == -1)
3044                 return;
3045             stream_index = 0;
3046         }
3047         if (stream_index == start_index)
3048             return;
3049         st = ic->streams[stream_index];
3050         if (st->codec->codec_type == codec_type) {
3051             /* check that parameters are OK */
3052             switch (codec_type) {
3053             case AVMEDIA_TYPE_AUDIO:
3054                 if (st->codec->sample_rate != 0 &&
3055                     st->codec->channels != 0)
3056                     goto the_end;
3057                 break;
3058             case AVMEDIA_TYPE_VIDEO:
3059             case AVMEDIA_TYPE_SUBTITLE:
3060                 goto the_end;
3061             default:
3062                 break;
3063             }
3064         }
3065     }
3066  the_end:
3067     stream_component_close(is, old_index);
3068     stream_component_open(is, stream_index);
3069 }
3070
3071
3072 static void toggle_full_screen(VideoState *is)
3073 {
3074 #if defined(__APPLE__) && SDL_VERSION_ATLEAST(1, 2, 14)
3075     /* OS X needs to reallocate the SDL overlays */
3076     int i;
3077     for (i = 0; i < VIDEO_PICTURE_QUEUE_SIZE; i++)
3078         is->pictq[i].reallocate = 1;
3079 #endif
3080     is_full_screen = !is_full_screen;
3081     video_open(is, 1, NULL);
3082 }
3083
3084 static void toggle_audio_display(VideoState *is)
3085 {
3086     int bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
3087     int next = is->show_mode;
3088     do {
3089         next = (next + 1) % SHOW_MODE_NB;
3090     } while (next != is->show_mode && (next == SHOW_MODE_VIDEO && !is->video_st || next != SHOW_MODE_VIDEO && !is->audio_st));
3091     if (is->show_mode != next) {
3092         fill_rectangle(screen,
3093                     is->xleft, is->ytop, is->width, is->height,
3094                     bgcolor, 1);
3095         is->force_refresh = 1;
3096         is->show_mode = next;
3097     }
3098 }
3099
3100 static void refresh_loop_wait_event(VideoState *is, SDL_Event *event) {
3101     double remaining_time = 0.0;
3102     SDL_PumpEvents();
3103     while (!SDL_PeepEvents(event, 1, SDL_GETEVENT, SDL_ALLEVENTS)) {
3104         if (!cursor_hidden && av_gettime() - cursor_last_shown > CURSOR_HIDE_DELAY) {
3105             SDL_ShowCursor(0);
3106             cursor_hidden = 1;
3107         }
3108         if (remaining_time > 0.0)
3109             av_usleep((int64_t)(remaining_time * 1000000.0));
3110         remaining_time = REFRESH_RATE;
3111         if (is->show_mode != SHOW_MODE_NONE && (!is->paused || is->force_refresh))
3112             video_refresh(is, &remaining_time);
3113         SDL_PumpEvents();
3114     }
3115 }
3116
3117 /* handle an event sent by the GUI */
3118 static void event_loop(VideoState *cur_stream)
3119 {
3120     SDL_Event event;
3121     double incr, pos, frac;
3122
3123     for (;;) {
3124         double x;
3125         refresh_loop_wait_event(cur_stream, &event);
3126         switch (event.type) {
3127         case SDL_KEYDOWN:
3128             if (exit_on_keydown) {
3129                 do_exit(cur_stream);
3130                 break;
3131             }
3132             switch (event.key.keysym.sym) {
3133             case SDLK_ESCAPE:
3134             case SDLK_q:
3135                 do_exit(cur_stream);
3136                 break;
3137             case SDLK_f:
3138                 toggle_full_screen(cur_stream);
3139                 cur_stream->force_refresh = 1;
3140                 break;
3141             case SDLK_p:
3142             case SDLK_SPACE:
3143                 toggle_pause(cur_stream);
3144                 break;
3145             case SDLK_s: // S: Step to next frame
3146                 step_to_next_frame(cur_stream);
3147                 break;
3148             case SDLK_a:
3149                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_AUDIO);
3150                 break;
3151             case SDLK_v:
3152                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_VIDEO);
3153                 break;
3154             case SDLK_t:
3155                 stream_cycle_channel(cur_stream, AVMEDIA_TYPE_SUBTITLE);
3156                 break;
3157             case SDLK_w:
3158                 toggle_audio_display(cur_stream);
3159                 break;
3160             case SDLK_PAGEUP:
3161                 incr = 600.0;
3162                 goto do_seek;
3163             case SDLK_PAGEDOWN:
3164                 incr = -600.0;
3165                 goto do_seek;
3166             case SDLK_LEFT:
3167                 incr = -10.0;
3168                 goto do_seek;
3169             case SDLK_RIGHT:
3170                 incr = 10.0;
3171                 goto do_seek;
3172             case SDLK_UP:
3173                 incr = 60.0;
3174                 goto do_seek;
3175             case SDLK_DOWN:
3176                 incr = -60.0;
3177             do_seek:
3178                     if (seek_by_bytes) {
3179                         if (cur_stream->video_stream >= 0 && cur_stream->video_current_pos >= 0) {
3180                             pos = cur_stream->video_current_pos;
3181                         } else if (cur_stream->audio_stream >= 0 && cur_stream->audio_pkt.pos >= 0) {
3182                             pos = cur_stream->audio_pkt.pos;
3183                         } else
3184                             pos = avio_tell(cur_stream->ic->pb);
3185                         if (cur_stream->ic->bit_rate)
3186                             incr *= cur_stream->ic->bit_rate / 8.0;
3187                         else
3188                             incr *= 180000.0;
3189                         pos += incr;
3190                         stream_seek(cur_stream, pos, incr, 1);
3191                     } else {
3192                         pos = get_master_clock(cur_stream);
3193                         if (isnan(pos))
3194                             pos = (double)cur_stream->seek_pos / AV_TIME_BASE;
3195                         pos += incr;
3196                         if (cur_stream->ic->start_time != AV_NOPTS_VALUE && pos < cur_stream->ic->start_time / (double)AV_TIME_BASE)
3197                             pos = cur_stream->ic->start_time / (double)AV_TIME_BASE;
3198                         stream_seek(cur_stream, (int64_t)(pos * AV_TIME_BASE), (int64_t)(incr * AV_TIME_BASE), 0);
3199                     }
3200                 break;
3201             default:
3202                 break;
3203             }
3204             break;
3205         case SDL_VIDEOEXPOSE:
3206             cur_stream->force_refresh = 1;
3207             break;
3208         case SDL_MOUSEBUTTONDOWN:
3209             if (exit_on_mousedown) {
3210                 do_exit(cur_stream);
3211                 break;
3212             }
3213         case SDL_MOUSEMOTION:
3214             if (cursor_hidden) {
3215                 SDL_ShowCursor(1);
3216                 cursor_hidden = 0;
3217             }
3218             cursor_last_shown = av_gettime();
3219             if (event.type == SDL_MOUSEBUTTONDOWN) {
3220                 x = event.button.x;
3221             } else {
3222                 if (event.motion.state != SDL_PRESSED)
3223                     break;
3224                 x = event.motion.x;
3225             }
3226                 if (seek_by_bytes || cur_stream->ic->duration <= 0) {
3227                     uint64_t size =  avio_size(cur_stream->ic->pb);
3228                     stream_seek(cur_stream, size*x/cur_stream->width, 0, 1);
3229                 } else {
3230                     int64_t ts;
3231                     int ns, hh, mm, ss;
3232                     int tns, thh, tmm, tss;
3233                     tns  = cur_stream->ic->duration / 1000000LL;
3234                     thh  = tns / 3600;
3235                     tmm  = (tns % 3600) / 60;
3236                     tss  = (tns % 60);
3237                     frac = x / cur_stream->width;
3238                     ns   = frac * tns;
3239                     hh   = ns / 3600;
3240                     mm   = (ns % 3600) / 60;
3241                     ss   = (ns % 60);
3242                     av_log(NULL, AV_LOG_INFO,
3243                            "Seek to %2.0f%% (%2d:%02d:%02d) of total duration (%2d:%02d:%02d)       \n", frac*100,
3244                             hh, mm, ss, thh, tmm, tss);
3245                     ts = frac * cur_stream->ic->duration;
3246                     if (cur_stream->ic->start_time != AV_NOPTS_VALUE)
3247                         ts += cur_stream->ic->start_time;
3248                     stream_seek(cur_stream, ts, 0, 0);
3249                 }
3250             break;
3251         case SDL_VIDEORESIZE:
3252                 screen = SDL_SetVideoMode(FFMIN(16383, event.resize.w), event.resize.h, 0,
3253                                           SDL_HWSURFACE|SDL_RESIZABLE|SDL_ASYNCBLIT|SDL_HWACCEL);
3254                 if (!screen) {
3255                     av_log(NULL, AV_LOG_FATAL, "Failed to set video mode\n");
3256                     do_exit(cur_stream);
3257                 }
3258                 screen_width  = cur_stream->width  = screen->w;
3259                 screen_height = cur_stream->height = screen->h;
3260                 cur_stream->force_refresh = 1;
3261             break;
3262         case SDL_QUIT:
3263         case FF_QUIT_EVENT:
3264             do_exit(cur_stream);
3265             break;
3266         case FF_ALLOC_EVENT:
3267             alloc_picture(event.user.data1);
3268             break;
3269         default:
3270             break;
3271         }
3272     }
3273 }
3274
3275 static int opt_frame_size(void *optctx, const char *opt, const char *arg)
3276 {
3277     av_log(NULL, AV_LOG_WARNING, "Option -s is deprecated, use -video_size.\n");
3278     return opt_default(NULL, "video_size", arg);
3279 }
3280
3281 static int opt_width(void *optctx, const char *opt, const char *arg)
3282 {
3283     screen_width = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
3284     return 0;
3285 }
3286
3287 static int opt_height(void *optctx, const char *opt, const char *arg)
3288 {
3289     screen_height = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
3290     return 0;
3291 }
3292
3293 static int opt_format(void *optctx, const char *opt, const char *arg)
3294 {
3295     file_iformat = av_find_input_format(arg);
3296     if (!file_iformat) {
3297         av_log(NULL, AV_LOG_FATAL, "Unknown input format: %s\n", arg);
3298         return AVERROR(EINVAL);
3299     }
3300     return 0;
3301 }
3302
3303 static int opt_frame_pix_fmt(void *optctx, const char *opt, const char *arg)
3304 {
3305     av_log(NULL, AV_LOG_WARNING, "Option -pix_fmt is deprecated, use -pixel_format.\n");
3306     return opt_default(NULL, "pixel_format", arg);
3307 }
3308
3309 static int opt_sync(void *optctx, const char *opt, const char *arg)
3310 {
3311     if (!strcmp(arg, "audio"))
3312         av_sync_type = AV_SYNC_AUDIO_MASTER;
3313     else if (!strcmp(arg, "video"))
3314         av_sync_type = AV_SYNC_VIDEO_MASTER;
3315     else if (!strcmp(arg, "ext"))
3316         av_sync_type = AV_SYNC_EXTERNAL_CLOCK;
3317     else {
3318         av_log(NULL, AV_LOG_ERROR, "Unknown value for %s: %s\n", opt, arg);
3319         exit(1);
3320     }
3321     return 0;
3322 }
3323
3324 static int opt_seek(void *optctx, const char *opt, const char *arg)
3325 {
3326     start_time = parse_time_or_die(opt, arg, 1);
3327     return 0;
3328 }
3329
3330 static int opt_duration(void *optctx, const char *opt, const char *arg)
3331 {
3332     duration = parse_time_or_die(opt, arg, 1);
3333     return 0;
3334 }
3335
3336 static int opt_show_mode(void *optctx, const char *opt, const char *arg)
3337 {
3338     show_mode = !strcmp(arg, "video") ? SHOW_MODE_VIDEO :
3339                 !strcmp(arg, "waves") ? SHOW_MODE_WAVES :
3340                 !strcmp(arg, "rdft" ) ? SHOW_MODE_RDFT  :
3341                 parse_number_or_die(opt, arg, OPT_INT, 0, SHOW_MODE_NB-1);
3342     return 0;
3343 }
3344
3345 static void opt_input_file(void *optctx, const char *filename)
3346 {
3347     if (input_filename) {
3348         av_log(NULL, AV_LOG_FATAL,
3349                "Argument '%s' provided as input filename, but '%s' was already specified.\n",
3350                 filename, input_filename);
3351         exit(1);
3352     }
3353     if (!strcmp(filename, "-"))
3354         filename = "pipe:";
3355     input_filename = filename;
3356 }
3357
3358 static int opt_codec(void *optctx, const char *opt, const char *arg)
3359 {
3360    const char *spec = strchr(opt, ':');
3361    if (!spec) {
3362        av_log(NULL, AV_LOG_ERROR,
3363               "No media specifier was specified in '%s' in option '%s'\n",
3364                arg, opt);
3365        return AVERROR(EINVAL);
3366    }
3367    spec++;
3368    switch (spec[0]) {
3369    case 'a' :    audio_codec_name = arg; break;
3370    case 's' : subtitle_codec_name = arg; break;
3371    case 'v' :    video_codec_name = arg; break;
3372    default:
3373        av_log(NULL, AV_LOG_ERROR,
3374               "Invalid media specifier '%s' in option '%s'\n", spec, opt);
3375        return AVERROR(EINVAL);
3376    }
3377    return 0;
3378 }
3379
3380 static int dummy;
3381
3382 static const OptionDef options[] = {
3383 #include "cmdutils_common_opts.h"
3384     { "x", HAS_ARG, { .func_arg = opt_width }, "force displayed width", "width" },
3385     { "y", HAS_ARG, { .func_arg = opt_height }, "force displayed height", "height" },
3386     { "s", HAS_ARG | OPT_VIDEO, { .func_arg = opt_frame_size }, "set frame size (WxH or abbreviation)", "size" },
3387     { "fs", OPT_BOOL, { &is_full_screen }, "force full screen" },
3388     { "an", OPT_BOOL, { &audio_disable }, "disable audio" },
3389     { "vn", OPT_BOOL, { &video_disable }, "disable video" },
3390     { "sn", OPT_BOOL, { &subtitle_disable }, "disable subtitling" },
3391     { "ast", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_AUDIO] }, "select desired audio stream", "stream_number" },
3392     { "vst", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_VIDEO] }, "select desired video stream", "stream_number" },
3393     { "sst", OPT_INT | HAS_ARG | OPT_EXPERT, { &wanted_stream[AVMEDIA_TYPE_SUBTITLE] }, "select desired subtitle stream", "stream_number" },
3394     { "ss", HAS_ARG, { .func_arg = opt_seek }, "seek to a given position in seconds", "pos" },
3395     { "t", HAS_ARG, { .func_arg = opt_duration }, "play  \"duration\" seconds of audio/video", "duration" },
3396     { "bytes", OPT_INT | HAS_ARG, { &seek_by_bytes }, "seek by bytes 0=off 1=on -1=auto", "val" },
3397     { "nodisp", OPT_BOOL, { &display_disable }, "disable graphical display" },
3398     { "f", HAS_ARG, { .func_arg = opt_format }, "force format", "fmt" },
3399     { "pix_fmt", HAS_ARG | OPT_EXPERT | OPT_VIDEO, { .func_arg = opt_frame_pix_fmt }, "set pixel format", "format" },
3400     { "stats", OPT_BOOL | OPT_EXPERT, { &show_status }, "show status", "" },
3401     { "bug", OPT_INT | HAS_ARG | OPT_EXPERT, { &workaround_bugs }, "workaround bugs", "" },
3402     { "fast", OPT_BOOL | OPT_EXPERT, { &fast }, "non spec compliant optimizations", "" },
3403     { "genpts", OPT_BOOL | OPT_EXPERT, { &genpts }, "generate pts", "" },
3404     { "drp", OPT_INT | HAS_ARG | OPT_EXPERT, { &decoder_reorder_pts }, "let decoder reorder pts 0=off 1=on -1=auto", ""},
3405     { "lowres", OPT_INT | HAS_ARG | OPT_EXPERT, { &lowres }, "", "" },
3406     { "ec", OPT_INT | HAS_ARG | OPT_EXPERT, { &error_concealment }, "set error concealment options",  "bit_mask" },
3407     { "sync", HAS_ARG | OPT_EXPERT, { .func_arg = opt_sync }, "set audio-video sync. type (type=audio/video/ext)", "type" },
3408     { "autoexit", OPT_BOOL | OPT_EXPERT, { &autoexit }, "exit at the end", "" },
3409     { "exitonkeydown", OPT_BOOL | OPT_EXPERT, { &exit_on_keydown }, "exit on key down", "" },
3410     { "exitonmousedown", OPT_BOOL | OPT_EXPERT, { &exit_on_mousedown }, "exit on mouse down", "" },
3411     { "loop", OPT_INT | HAS_ARG | OPT_EXPERT, { &loop }, "set number of times the playback shall be looped", "loop count" },
3412     { "framedrop", OPT_BOOL | OPT_EXPERT, { &framedrop }, "drop frames when cpu is too slow", "" },
3413     { "infbuf", OPT_BOOL | OPT_EXPERT, { &infinite_buffer }, "don't limit the input buffer size (useful with realtime streams)", "" },
3414     { "window_title", OPT_STRING | HAS_ARG, { &window_title }, "set window title", "window title" },
3415 #if CONFIG_AVFILTER
3416     { "vf", OPT_STRING | HAS_ARG, { &vfilters }, "set video filters", "filter_graph" },
3417     { "af", OPT_STRING | HAS_ARG, { &afilters }, "set audio filters", "filter_graph" },
3418 #endif
3419     { "rdftspeed", OPT_INT | HAS_ARG| OPT_AUDIO | OPT_EXPERT, { &rdftspeed }, "rdft speed", "msecs" },
3420     { "showmode", HAS_ARG, { .func_arg = opt_show_mode}, "select show mode (0 = video, 1 = waves, 2 = RDFT)", "mode" },
3421     { "default", HAS_ARG | OPT_AUDIO | OPT_VIDEO | OPT_EXPERT, { .func_arg = opt_default }, "generic catch all option", "" },
3422     { "i", OPT_BOOL, { &dummy}, "read specified file", "input_file"},
3423     { "codec", HAS_ARG, { .func_arg = opt_codec}, "force decoder", "decoder_name" },
3424     { "acodec", HAS_ARG | OPT_STRING | OPT_EXPERT, {    &audio_codec_name }, "force audio decoder",    "decoder_name" },
3425     { "scodec", HAS_ARG | OPT_STRING | OPT_EXPERT, { &subtitle_codec_name }, "force subtitle decoder", "decoder_name" },
3426     { "vcodec", HAS_ARG | OPT_STRING | OPT_EXPERT, {    &video_codec_name }, "force video decoder",    "decoder_name" },
3427     { NULL, },
3428 };
3429
3430 static void show_usage(void)
3431 {
3432     av_log(NULL, AV_LOG_INFO, "Simple media player\n");
3433     av_log(NULL, AV_LOG_INFO, "usage: %s [options] input_file\n", program_name);
3434     av_log(NULL, AV_LOG_INFO, "\n");
3435 }
3436
3437 void show_help_default(const char *opt, const char *arg)
3438 {
3439     av_log_set_callback(log_callback_help);
3440     show_usage();
3441     show_help_options(options, "Main options:", 0, OPT_EXPERT, 0);
3442     show_help_options(options, "Advanced options:", OPT_EXPERT, 0, 0);
3443     printf("\n");
3444     show_help_children(avcodec_get_class(), AV_OPT_FLAG_DECODING_PARAM);
3445     show_help_children(avformat_get_class(), AV_OPT_FLAG_DECODING_PARAM);
3446 #if !CONFIG_AVFILTER
3447     show_help_children(sws_get_class(), AV_OPT_FLAG_ENCODING_PARAM);
3448 #else
3449     show_help_children(avfilter_get_class(), AV_OPT_FLAG_FILTERING_PARAM);
3450 #endif
3451     printf("\nWhile playing:\n"
3452            "q, ESC              quit\n"
3453            "f                   toggle full screen\n"
3454            "p, SPC              pause\n"
3455            "a                   cycle audio channel\n"
3456            "v                   cycle video channel\n"
3457            "t                   cycle subtitle channel\n"
3458            "w                   show audio waves\n"
3459            "s                   activate frame-step mode\n"
3460            "left/right          seek backward/forward 10 seconds\n"
3461            "down/up             seek backward/forward 1 minute\n"
3462            "page down/page up   seek backward/forward 10 minutes\n"
3463            "mouse click         seek to percentage in file corresponding to fraction of width\n"
3464            );
3465 }
3466
3467 static int lockmgr(void **mtx, enum AVLockOp op)
3468 {
3469    switch(op) {
3470       case AV_LOCK_CREATE:
3471           *mtx = SDL_CreateMutex();
3472           if(!*mtx)
3473               return 1;
3474           return 0;
3475       case AV_LOCK_OBTAIN:
3476           return !!SDL_LockMutex(*mtx);
3477       case AV_LOCK_RELEASE:
3478           return !!SDL_UnlockMutex(*mtx);
3479       case AV_LOCK_DESTROY:
3480           SDL_DestroyMutex(*mtx);
3481           return 0;
3482    }
3483    return 1;
3484 }
3485
3486 /* Called from the main */
3487 int main(int argc, char **argv)
3488 {
3489     int flags;
3490     VideoState *is;
3491     char dummy_videodriver[] = "SDL_VIDEODRIVER=dummy";
3492
3493     av_log_set_flags(AV_LOG_SKIP_REPEATED);
3494     parse_loglevel(argc, argv, options);
3495
3496     /* register all codecs, demux and protocols */
3497     avcodec_register_all();
3498 #if CONFIG_AVDEVICE
3499     avdevice_register_all();
3500 #endif
3501 #if CONFIG_AVFILTER
3502     avfilter_register_all();
3503 #endif
3504     av_register_all();
3505     avformat_network_init();
3506
3507     init_opts();
3508
3509     signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).    */
3510     signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
3511
3512     show_banner(argc, argv, options);
3513
3514     parse_options(NULL, argc, argv, options, opt_input_file);
3515
3516     if (!input_filename) {
3517         show_usage();
3518         av_log(NULL, AV_LOG_FATAL, "An input file must be specified\n");
3519         av_log(NULL, AV_LOG_FATAL,
3520                "Use -h to get full help or, even better, run 'man %s'\n", program_name);
3521         exit(1);
3522     }
3523
3524     if (display_disable) {
3525         video_disable = 1;
3526     }
3527     flags = SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER;
3528     if (audio_disable)
3529         flags &= ~SDL_INIT_AUDIO;
3530     if (display_disable)
3531         SDL_putenv(dummy_videodriver); /* For the event queue, we always need a video driver. */
3532 #if !defined(__MINGW32__) && !defined(__APPLE__)
3533     flags |= SDL_INIT_EVENTTHREAD; /* Not supported on Windows or Mac OS X */
3534 #endif
3535     if (SDL_Init (flags)) {
3536         av_log(NULL, AV_LOG_FATAL, "Could not initialize SDL - %s\n", SDL_GetError());
3537         av_log(NULL, AV_LOG_FATAL, "(Did you set the DISPLAY variable?)\n");
3538         exit(1);
3539     }
3540
3541     if (!display_disable) {
3542         const SDL_VideoInfo *vi = SDL_GetVideoInfo();
3543         fs_screen_width = vi->current_w;
3544         fs_screen_height = vi->current_h;
3545     }
3546
3547     SDL_EventState(SDL_ACTIVEEVENT, SDL_IGNORE);
3548     SDL_EventState(SDL_SYSWMEVENT, SDL_IGNORE);
3549     SDL_EventState(SDL_USEREVENT, SDL_IGNORE);
3550
3551     if (av_lockmgr_register(lockmgr)) {
3552         av_log(NULL, AV_LOG_FATAL, "Could not initialize lock manager!\n");
3553         do_exit(NULL);
3554     }
3555
3556     av_init_packet(&flush_pkt);
3557     flush_pkt.data = (uint8_t *)&flush_pkt;
3558
3559     is = stream_open(input_filename, file_iformat);
3560     if (!is) {
3561         av_log(NULL, AV_LOG_FATAL, "Failed to initialize VideoState!\n");
3562         do_exit(NULL);
3563     }
3564
3565     event_loop(is);
3566
3567     /* never returns */
3568
3569     return 0;
3570 }