2 * FFplay : Simple Media Player based on the ffmpeg libraries
3 * Copyright (c) 2003 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "libavutil/avstring.h"
25 #include "libavformat/avformat.h"
26 #include "libavformat/rtsp.h"
27 #include "libavdevice/avdevice.h"
28 #include "libswscale/swscale.h"
33 #include <SDL_thread.h>
36 #undef main /* We don't want SDL to override our main() */
41 const char program_name[] = "FFplay";
42 const int program_birth_year = 2003;
46 #define MAX_VIDEOQ_SIZE (5 * 256 * 1024)
47 #define MAX_AUDIOQ_SIZE (5 * 16 * 1024)
48 #define MAX_SUBTITLEQ_SIZE (5 * 16 * 1024)
50 /* SDL audio buffer size, in samples. Should be small to have precise
51 A/V sync as SDL does not have hardware buffer fullness info. */
52 #define SDL_AUDIO_BUFFER_SIZE 1024
54 /* no AV sync correction is done if below the AV sync threshold */
55 #define AV_SYNC_THRESHOLD 0.01
56 /* no AV correction is done if too big error */
57 #define AV_NOSYNC_THRESHOLD 10.0
59 /* maximum audio speed change to get correct sync */
60 #define SAMPLE_CORRECTION_PERCENT_MAX 10
62 /* we use about AUDIO_DIFF_AVG_NB A-V differences to make the average */
63 #define AUDIO_DIFF_AVG_NB 20
65 /* NOTE: the size must be big enough to compensate the hardware audio buffersize size */
66 #define SAMPLE_ARRAY_SIZE (2*65536)
68 static int sws_flags = SWS_BICUBIC;
70 typedef struct PacketQueue {
71 AVPacketList *first_pkt, *last_pkt;
79 #define VIDEO_PICTURE_QUEUE_SIZE 1
80 #define SUBPICTURE_QUEUE_SIZE 4
82 typedef struct VideoPicture {
83 double pts; ///<presentation time stamp for this picture
85 int width, height; /* source height & width */
89 typedef struct SubPicture {
90 double pts; /* presentation time stamp for this picture */
95 AV_SYNC_AUDIO_MASTER, /* default choice */
97 AV_SYNC_EXTERNAL_CLOCK, /* synchronize to an external clock */
100 typedef struct VideoState {
101 SDL_Thread *parse_tid;
102 SDL_Thread *video_tid;
103 AVInputFormat *iformat;
112 int dtg_active_format;
117 double external_clock; /* external clock base */
118 int64_t external_clock_time;
121 double audio_diff_cum; /* used for AV difference average computation */
122 double audio_diff_avg_coef;
123 double audio_diff_threshold;
124 int audio_diff_avg_count;
127 int audio_hw_buf_size;
128 /* samples output by the codec. we reserve more space for avsync
130 DECLARE_ALIGNED(16,uint8_t,audio_buf[(AVCODEC_MAX_AUDIO_FRAME_SIZE * 3) / 2]);
131 unsigned int audio_buf_size; /* in bytes */
132 int audio_buf_index; /* in bytes */
134 uint8_t *audio_pkt_data;
137 int show_audio; /* if true, display audio samples */
138 int16_t sample_array[SAMPLE_ARRAY_SIZE];
139 int sample_array_index;
142 SDL_Thread *subtitle_tid;
144 int subtitle_stream_changed;
145 AVStream *subtitle_st;
146 PacketQueue subtitleq;
147 SubPicture subpq[SUBPICTURE_QUEUE_SIZE];
148 int subpq_size, subpq_rindex, subpq_windex;
149 SDL_mutex *subpq_mutex;
150 SDL_cond *subpq_cond;
153 double frame_last_pts;
154 double frame_last_delay;
155 double video_clock; ///<pts of last decoded frame / predicted pts of next decoded frame
159 double video_current_pts; ///<current displayed pts (different from video_clock if frame fifos are used)
160 int64_t video_current_pts_time; ///<time (av_gettime) at which we updated video_current_pts - used to have running video pts
161 VideoPicture pictq[VIDEO_PICTURE_QUEUE_SIZE];
162 int pictq_size, pictq_rindex, pictq_windex;
163 SDL_mutex *pictq_mutex;
164 SDL_cond *pictq_cond;
166 // QETimer *video_timer;
168 int width, height, xleft, ytop;
171 static void show_help(void);
172 static int audio_write_get_buf_size(VideoState *is);
174 /* options specified by the user */
175 static AVInputFormat *file_iformat;
176 static const char *input_filename;
177 static int fs_screen_width;
178 static int fs_screen_height;
179 static int screen_width = 0;
180 static int screen_height = 0;
181 static int frame_width = 0;
182 static int frame_height = 0;
183 static enum PixelFormat frame_pix_fmt = PIX_FMT_NONE;
184 static int audio_disable;
185 static int video_disable;
186 static int wanted_audio_stream= 0;
187 static int wanted_video_stream= 0;
188 static int seek_by_bytes;
189 static int display_disable;
190 static int show_status;
191 static int av_sync_type = AV_SYNC_AUDIO_MASTER;
192 static int64_t start_time = AV_NOPTS_VALUE;
193 static int debug = 0;
194 static int debug_mv = 0;
196 static int thread_count = 1;
197 static int workaround_bugs = 1;
199 static int genpts = 0;
200 static int lowres = 0;
201 static int idct = FF_IDCT_AUTO;
202 static enum AVDiscard skip_frame= AVDISCARD_DEFAULT;
203 static enum AVDiscard skip_idct= AVDISCARD_DEFAULT;
204 static enum AVDiscard skip_loop_filter= AVDISCARD_DEFAULT;
205 static int error_resilience = FF_ER_CAREFUL;
206 static int error_concealment = 3;
207 static int decoder_reorder_pts= 0;
209 /* current context */
210 static int is_full_screen;
211 static VideoState *cur_stream;
212 static int64_t audio_callback_time;
216 #define FF_ALLOC_EVENT (SDL_USEREVENT)
217 #define FF_REFRESH_EVENT (SDL_USEREVENT + 1)
218 #define FF_QUIT_EVENT (SDL_USEREVENT + 2)
222 /* packet queue handling */
223 static void packet_queue_init(PacketQueue *q)
225 memset(q, 0, sizeof(PacketQueue));
226 q->mutex = SDL_CreateMutex();
227 q->cond = SDL_CreateCond();
230 static void packet_queue_flush(PacketQueue *q)
232 AVPacketList *pkt, *pkt1;
234 SDL_LockMutex(q->mutex);
235 for(pkt = q->first_pkt; pkt != NULL; pkt = pkt1) {
237 av_free_packet(&pkt->pkt);
244 SDL_UnlockMutex(q->mutex);
247 static void packet_queue_end(PacketQueue *q)
249 packet_queue_flush(q);
250 SDL_DestroyMutex(q->mutex);
251 SDL_DestroyCond(q->cond);
254 static int packet_queue_put(PacketQueue *q, AVPacket *pkt)
258 /* duplicate the packet */
259 if (pkt!=&flush_pkt && av_dup_packet(pkt) < 0)
262 pkt1 = av_malloc(sizeof(AVPacketList));
269 SDL_LockMutex(q->mutex);
275 q->last_pkt->next = pkt1;
278 q->size += pkt1->pkt.size;
279 /* XXX: should duplicate packet data in DV case */
280 SDL_CondSignal(q->cond);
282 SDL_UnlockMutex(q->mutex);
286 static void packet_queue_abort(PacketQueue *q)
288 SDL_LockMutex(q->mutex);
290 q->abort_request = 1;
292 SDL_CondSignal(q->cond);
294 SDL_UnlockMutex(q->mutex);
297 /* return < 0 if aborted, 0 if no packet and > 0 if packet. */
298 static int packet_queue_get(PacketQueue *q, AVPacket *pkt, int block)
303 SDL_LockMutex(q->mutex);
306 if (q->abort_request) {
313 q->first_pkt = pkt1->next;
317 q->size -= pkt1->pkt.size;
326 SDL_CondWait(q->cond, q->mutex);
329 SDL_UnlockMutex(q->mutex);
333 static inline void fill_rectangle(SDL_Surface *screen,
334 int x, int y, int w, int h, int color)
341 SDL_FillRect(screen, &rect, color);
345 /* draw only the border of a rectangle */
346 void fill_border(VideoState *s, int x, int y, int w, int h, int color)
350 /* fill the background */
354 w2 = s->width - (x + w);
360 h2 = s->height - (y + h);
363 fill_rectangle(screen,
367 fill_rectangle(screen,
368 s->xleft + s->width - w2, s->ytop,
371 fill_rectangle(screen,
372 s->xleft + w1, s->ytop,
373 s->width - w1 - w2, h1,
375 fill_rectangle(screen,
376 s->xleft + w1, s->ytop + s->height - h2,
377 s->width - w1 - w2, h2,
385 #define ONE_HALF (1 << (SCALEBITS - 1))
386 #define FIX(x) ((int) ((x) * (1<<SCALEBITS) + 0.5))
388 #define RGB_TO_Y_CCIR(r, g, b) \
389 ((FIX(0.29900*219.0/255.0) * (r) + FIX(0.58700*219.0/255.0) * (g) + \
390 FIX(0.11400*219.0/255.0) * (b) + (ONE_HALF + (16 << SCALEBITS))) >> SCALEBITS)
392 #define RGB_TO_U_CCIR(r1, g1, b1, shift)\
393 (((- FIX(0.16874*224.0/255.0) * r1 - FIX(0.33126*224.0/255.0) * g1 + \
394 FIX(0.50000*224.0/255.0) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)
396 #define RGB_TO_V_CCIR(r1, g1, b1, shift)\
397 (((FIX(0.50000*224.0/255.0) * r1 - FIX(0.41869*224.0/255.0) * g1 - \
398 FIX(0.08131*224.0/255.0) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)
400 #define ALPHA_BLEND(a, oldp, newp, s)\
401 ((((oldp << s) * (255 - (a))) + (newp * (a))) / (255 << s))
403 #define RGBA_IN(r, g, b, a, s)\
405 unsigned int v = ((const uint32_t *)(s))[0];\
406 a = (v >> 24) & 0xff;\
407 r = (v >> 16) & 0xff;\
408 g = (v >> 8) & 0xff;\
412 #define YUVA_IN(y, u, v, a, s, pal)\
414 unsigned int val = ((const uint32_t *)(pal))[*(const uint8_t*)(s)];\
415 a = (val >> 24) & 0xff;\
416 y = (val >> 16) & 0xff;\
417 u = (val >> 8) & 0xff;\
421 #define YUVA_OUT(d, y, u, v, a)\
423 ((uint32_t *)(d))[0] = (a << 24) | (y << 16) | (u << 8) | v;\
429 static void blend_subrect(AVPicture *dst, const AVSubtitleRect *rect, int imgw, int imgh)
431 int wrap, wrap3, width2, skip2;
432 int y, u, v, a, u1, v1, a1, w, h;
433 uint8_t *lum, *cb, *cr;
436 int dstx, dsty, dstw, dsth;
438 dstx = FFMIN(FFMAX(rect->x, 0), imgw);
439 dstw = FFMIN(FFMAX(rect->w, 0), imgw - dstx);
440 dsty = FFMIN(FFMAX(rect->y, 0), imgh);
441 dsth = FFMIN(FFMAX(rect->h, 0), imgh - dsty);
442 lum = dst->data[0] + dsty * dst->linesize[0];
443 cb = dst->data[1] + (dsty >> 1) * dst->linesize[1];
444 cr = dst->data[2] + (dsty >> 1) * dst->linesize[2];
446 width2 = (dstw + 1) >> 1;
448 wrap = dst->linesize[0];
449 wrap3 = rect->linesize;
451 pal = rect->rgba_palette; /* Now in YCrCb! */
459 YUVA_IN(y, u, v, a, p, pal);
460 lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
461 cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
462 cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
468 for(w = dstw - (dstx & 1); w >= 2; w -= 2) {
469 YUVA_IN(y, u, v, a, p, pal);
473 lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
475 YUVA_IN(y, u, v, a, p + BPP, pal);
479 lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
480 cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
481 cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
488 YUVA_IN(y, u, v, a, p, pal);
489 lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
490 cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
491 cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
493 p += wrap3 + (wrap3 - dstw * BPP);
494 lum += wrap + (wrap - dstw - dstx);
495 cb += dst->linesize[1] - width2 - skip2;
496 cr += dst->linesize[2] - width2 - skip2;
498 for(h = dsth - (dsty & 1); h >= 2; h -= 2) {
504 YUVA_IN(y, u, v, a, p, pal);
508 lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
511 YUVA_IN(y, u, v, a, p, pal);
515 lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
516 cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
517 cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
523 for(w = dstw - (dstx & 1); w >= 2; w -= 2) {
524 YUVA_IN(y, u, v, a, p, pal);
528 lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
530 YUVA_IN(y, u, v, a, p, pal);
534 lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
538 YUVA_IN(y, u, v, a, p, pal);
542 lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
544 YUVA_IN(y, u, v, a, p, pal);
548 lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
550 cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 2);
551 cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 2);
555 p += -wrap3 + 2 * BPP;
559 YUVA_IN(y, u, v, a, p, pal);
563 lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
566 YUVA_IN(y, u, v, a, p, pal);
570 lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
571 cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
572 cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
578 p += wrap3 + (wrap3 - dstw * BPP);
579 lum += wrap + (wrap - dstw - dstx);
580 cb += dst->linesize[1] - width2 - skip2;
581 cr += dst->linesize[2] - width2 - skip2;
583 /* handle odd height */
590 YUVA_IN(y, u, v, a, p, pal);
591 lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
592 cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
593 cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
599 for(w = dstw - (dstx & 1); w >= 2; w -= 2) {
600 YUVA_IN(y, u, v, a, p, pal);
604 lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
606 YUVA_IN(y, u, v, a, p + BPP, pal);
610 lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
611 cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u, 1);
612 cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v, 1);
619 YUVA_IN(y, u, v, a, p, pal);
620 lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
621 cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
622 cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
627 static void free_subpicture(SubPicture *sp)
631 for (i = 0; i < sp->sub.num_rects; i++)
633 av_free(sp->sub.rects[i].bitmap);
634 av_free(sp->sub.rects[i].rgba_palette);
637 av_free(sp->sub.rects);
639 memset(&sp->sub, 0, sizeof(AVSubtitle));
642 static void video_image_display(VideoState *is)
648 int width, height, x, y;
652 vp = &is->pictq[is->pictq_rindex];
654 /* XXX: use variable in the frame */
655 if (is->video_st->codec->sample_aspect_ratio.num == 0)
658 aspect_ratio = av_q2d(is->video_st->codec->sample_aspect_ratio)
659 * is->video_st->codec->width / is->video_st->codec->height;
660 if (aspect_ratio <= 0.0)
661 aspect_ratio = (float)is->video_st->codec->width /
662 (float)is->video_st->codec->height;
663 /* if an active format is indicated, then it overrides the
666 if (is->video_st->codec->dtg_active_format != is->dtg_active_format) {
667 is->dtg_active_format = is->video_st->codec->dtg_active_format;
668 printf("dtg_active_format=%d\n", is->dtg_active_format);
672 switch(is->video_st->codec->dtg_active_format) {
673 case FF_DTG_AFD_SAME:
678 aspect_ratio = 4.0 / 3.0;
680 case FF_DTG_AFD_16_9:
681 aspect_ratio = 16.0 / 9.0;
683 case FF_DTG_AFD_14_9:
684 aspect_ratio = 14.0 / 9.0;
686 case FF_DTG_AFD_4_3_SP_14_9:
687 aspect_ratio = 14.0 / 9.0;
689 case FF_DTG_AFD_16_9_SP_14_9:
690 aspect_ratio = 14.0 / 9.0;
692 case FF_DTG_AFD_SP_4_3:
693 aspect_ratio = 4.0 / 3.0;
700 if (is->subpq_size > 0)
702 sp = &is->subpq[is->subpq_rindex];
704 if (vp->pts >= sp->pts + ((float) sp->sub.start_display_time / 1000))
706 SDL_LockYUVOverlay (vp->bmp);
708 pict.data[0] = vp->bmp->pixels[0];
709 pict.data[1] = vp->bmp->pixels[2];
710 pict.data[2] = vp->bmp->pixels[1];
712 pict.linesize[0] = vp->bmp->pitches[0];
713 pict.linesize[1] = vp->bmp->pitches[2];
714 pict.linesize[2] = vp->bmp->pitches[1];
716 for (i = 0; i < sp->sub.num_rects; i++)
717 blend_subrect(&pict, &sp->sub.rects[i],
718 vp->bmp->w, vp->bmp->h);
720 SDL_UnlockYUVOverlay (vp->bmp);
726 /* XXX: we suppose the screen has a 1.0 pixel ratio */
728 width = ((int)rint(height * aspect_ratio)) & -3;
729 if (width > is->width) {
731 height = ((int)rint(width / aspect_ratio)) & -3;
733 x = (is->width - width) / 2;
734 y = (is->height - height) / 2;
735 if (!is->no_background) {
736 /* fill the background */
737 // fill_border(is, x, y, width, height, QERGB(0x00, 0x00, 0x00));
739 is->no_background = 0;
741 rect.x = is->xleft + x;
742 rect.y = is->ytop + y;
745 SDL_DisplayYUVOverlay(vp->bmp, &rect);
748 fill_rectangle(screen,
749 is->xleft, is->ytop, is->width, is->height,
750 QERGB(0x00, 0x00, 0x00));
755 static inline int compute_mod(int a, int b)
764 static void video_audio_display(VideoState *s)
766 int i, i_start, x, y1, y, ys, delay, n, nb_display_channels;
767 int ch, channels, h, h2, bgcolor, fgcolor;
770 /* compute display index : center on currently output samples */
771 channels = s->audio_st->codec->channels;
772 nb_display_channels = channels;
775 delay = audio_write_get_buf_size(s);
778 /* to be more precise, we take into account the time spent since
779 the last buffer computation */
780 if (audio_callback_time) {
781 time_diff = av_gettime() - audio_callback_time;
782 delay += (time_diff * s->audio_st->codec->sample_rate) / 1000000;
785 delay -= s->width / 2;
786 if (delay < s->width)
789 i_start= x = compute_mod(s->sample_array_index - delay * channels, SAMPLE_ARRAY_SIZE);
792 for(i=0; i<1000; i+=channels){
793 int idx= (SAMPLE_ARRAY_SIZE + x - i) % SAMPLE_ARRAY_SIZE;
794 int a= s->sample_array[idx];
795 int b= s->sample_array[(idx + 4*channels)%SAMPLE_ARRAY_SIZE];
796 int c= s->sample_array[(idx + 5*channels)%SAMPLE_ARRAY_SIZE];
797 int d= s->sample_array[(idx + 9*channels)%SAMPLE_ARRAY_SIZE];
799 if(h<score && (b^c)<0){
805 s->last_i_start = i_start;
807 i_start = s->last_i_start;
810 bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
811 fill_rectangle(screen,
812 s->xleft, s->ytop, s->width, s->height,
815 fgcolor = SDL_MapRGB(screen->format, 0xff, 0xff, 0xff);
817 /* total height for one channel */
818 h = s->height / nb_display_channels;
819 /* graph height / 2 */
821 for(ch = 0;ch < nb_display_channels; ch++) {
823 y1 = s->ytop + ch * h + (h / 2); /* position of center line */
824 for(x = 0; x < s->width; x++) {
825 y = (s->sample_array[i] * h2) >> 15;
832 fill_rectangle(screen,
833 s->xleft + x, ys, 1, y,
836 if (i >= SAMPLE_ARRAY_SIZE)
837 i -= SAMPLE_ARRAY_SIZE;
841 fgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0xff);
843 for(ch = 1;ch < nb_display_channels; ch++) {
844 y = s->ytop + ch * h;
845 fill_rectangle(screen,
846 s->xleft, y, s->width, 1,
849 SDL_UpdateRect(screen, s->xleft, s->ytop, s->width, s->height);
852 static int video_open(VideoState *is){
853 int flags = SDL_HWSURFACE|SDL_ASYNCBLIT|SDL_HWACCEL;
856 if(is_full_screen) flags |= SDL_FULLSCREEN;
857 else flags |= SDL_RESIZABLE;
859 if (is_full_screen && fs_screen_width) {
861 h = fs_screen_height;
862 } else if(!is_full_screen && screen_width){
865 }else if (is->video_st && is->video_st->codec->width){
866 w = is->video_st->codec->width;
867 h = is->video_st->codec->height;
873 screen = SDL_SetVideoMode(w, h, 0, flags);
875 /* setting bits_per_pixel = 0 or 32 causes blank video on OS X */
876 screen = SDL_SetVideoMode(w, h, 24, flags);
879 fprintf(stderr, "SDL: could not set video mode - exiting\n");
882 SDL_WM_SetCaption("FFplay", "FFplay");
884 is->width = screen->w;
885 is->height = screen->h;
890 /* display the current picture, if any */
891 static void video_display(VideoState *is)
894 video_open(cur_stream);
895 if (is->audio_st && is->show_audio)
896 video_audio_display(is);
897 else if (is->video_st)
898 video_image_display(is);
901 static Uint32 sdl_refresh_timer_cb(Uint32 interval, void *opaque)
904 event.type = FF_REFRESH_EVENT;
905 event.user.data1 = opaque;
906 SDL_PushEvent(&event);
907 return 0; /* 0 means stop timer */
910 /* schedule a video refresh in 'delay' ms */
911 static void schedule_refresh(VideoState *is, int delay)
913 SDL_AddTimer(delay, sdl_refresh_timer_cb, is);
916 /* get the current audio clock value */
917 static double get_audio_clock(VideoState *is)
920 int hw_buf_size, bytes_per_sec;
921 pts = is->audio_clock;
922 hw_buf_size = audio_write_get_buf_size(is);
925 bytes_per_sec = is->audio_st->codec->sample_rate *
926 2 * is->audio_st->codec->channels;
929 pts -= (double)hw_buf_size / bytes_per_sec;
933 /* get the current video clock value */
934 static double get_video_clock(VideoState *is)
940 delta = (av_gettime() - is->video_current_pts_time) / 1000000.0;
942 return is->video_current_pts + delta;
945 /* get the current external clock value */
946 static double get_external_clock(VideoState *is)
950 return is->external_clock + ((ti - is->external_clock_time) * 1e-6);
953 /* get the current master clock value */
954 static double get_master_clock(VideoState *is)
958 if (is->av_sync_type == AV_SYNC_VIDEO_MASTER) {
960 val = get_video_clock(is);
962 val = get_audio_clock(is);
963 } else if (is->av_sync_type == AV_SYNC_AUDIO_MASTER) {
965 val = get_audio_clock(is);
967 val = get_video_clock(is);
969 val = get_external_clock(is);
974 /* seek in the stream */
975 static void stream_seek(VideoState *is, int64_t pos, int rel)
979 is->seek_flags = rel < 0 ? AVSEEK_FLAG_BACKWARD : 0;
981 is->seek_flags |= AVSEEK_FLAG_BYTE;
986 /* pause or resume the video */
987 static void stream_pause(VideoState *is)
989 is->paused = !is->paused;
991 is->video_current_pts = get_video_clock(is);
992 is->frame_timer += (av_gettime() - is->video_current_pts_time) / 1000000.0;
996 /* called to display each frame */
997 static void video_refresh_timer(void *opaque)
999 VideoState *is = opaque;
1001 double actual_delay, delay, sync_threshold, ref_clock, diff;
1003 SubPicture *sp, *sp2;
1006 if (is->pictq_size == 0) {
1007 /* if no picture, need to wait */
1008 schedule_refresh(is, 1);
1010 /* dequeue the picture */
1011 vp = &is->pictq[is->pictq_rindex];
1013 /* update current video pts */
1014 is->video_current_pts = vp->pts;
1015 is->video_current_pts_time = av_gettime();
1017 /* compute nominal delay */
1018 delay = vp->pts - is->frame_last_pts;
1019 if (delay <= 0 || delay >= 2.0) {
1020 /* if incorrect delay, use previous one */
1021 delay = is->frame_last_delay;
1023 is->frame_last_delay = delay;
1024 is->frame_last_pts = vp->pts;
1026 /* update delay to follow master synchronisation source */
1027 if (((is->av_sync_type == AV_SYNC_AUDIO_MASTER && is->audio_st) ||
1028 is->av_sync_type == AV_SYNC_EXTERNAL_CLOCK)) {
1029 /* if video is slave, we try to correct big delays by
1030 duplicating or deleting a frame */
1031 ref_clock = get_master_clock(is);
1032 diff = vp->pts - ref_clock;
1034 /* skip or repeat frame. We take into account the
1035 delay to compute the threshold. I still don't know
1036 if it is the best guess */
1037 sync_threshold = AV_SYNC_THRESHOLD;
1038 if (delay > sync_threshold)
1039 sync_threshold = delay;
1040 if (fabs(diff) < AV_NOSYNC_THRESHOLD) {
1041 if (diff <= -sync_threshold)
1043 else if (diff >= sync_threshold)
1048 is->frame_timer += delay;
1049 /* compute the REAL delay (we need to do that to avoid
1051 actual_delay = is->frame_timer - (av_gettime() / 1000000.0);
1052 if (actual_delay < 0.010) {
1053 /* XXX: should skip picture */
1054 actual_delay = 0.010;
1056 /* launch timer for next picture */
1057 schedule_refresh(is, (int)(actual_delay * 1000 + 0.5));
1059 #if defined(DEBUG_SYNC)
1060 printf("video: delay=%0.3f actual_delay=%0.3f pts=%0.3f A-V=%f\n",
1061 delay, actual_delay, vp->pts, -diff);
1064 if(is->subtitle_st) {
1065 if (is->subtitle_stream_changed) {
1066 SDL_LockMutex(is->subpq_mutex);
1068 while (is->subpq_size) {
1069 free_subpicture(&is->subpq[is->subpq_rindex]);
1071 /* update queue size and signal for next picture */
1072 if (++is->subpq_rindex == SUBPICTURE_QUEUE_SIZE)
1073 is->subpq_rindex = 0;
1077 is->subtitle_stream_changed = 0;
1079 SDL_CondSignal(is->subpq_cond);
1080 SDL_UnlockMutex(is->subpq_mutex);
1082 if (is->subpq_size > 0) {
1083 sp = &is->subpq[is->subpq_rindex];
1085 if (is->subpq_size > 1)
1086 sp2 = &is->subpq[(is->subpq_rindex + 1) % SUBPICTURE_QUEUE_SIZE];
1090 if ((is->video_current_pts > (sp->pts + ((float) sp->sub.end_display_time / 1000)))
1091 || (sp2 && is->video_current_pts > (sp2->pts + ((float) sp2->sub.start_display_time / 1000))))
1093 free_subpicture(sp);
1095 /* update queue size and signal for next picture */
1096 if (++is->subpq_rindex == SUBPICTURE_QUEUE_SIZE)
1097 is->subpq_rindex = 0;
1099 SDL_LockMutex(is->subpq_mutex);
1101 SDL_CondSignal(is->subpq_cond);
1102 SDL_UnlockMutex(is->subpq_mutex);
1108 /* display picture */
1111 /* update queue size and signal for next picture */
1112 if (++is->pictq_rindex == VIDEO_PICTURE_QUEUE_SIZE)
1113 is->pictq_rindex = 0;
1115 SDL_LockMutex(is->pictq_mutex);
1117 SDL_CondSignal(is->pictq_cond);
1118 SDL_UnlockMutex(is->pictq_mutex);
1120 } else if (is->audio_st) {
1121 /* draw the next audio frame */
1123 schedule_refresh(is, 40);
1125 /* if only audio stream, then display the audio bars (better
1126 than nothing, just to test the implementation */
1128 /* display picture */
1131 schedule_refresh(is, 100);
1134 static int64_t last_time;
1136 int aqsize, vqsize, sqsize;
1139 cur_time = av_gettime();
1140 if (!last_time || (cur_time - last_time) >= 500 * 1000) {
1145 aqsize = is->audioq.size;
1147 vqsize = is->videoq.size;
1148 if (is->subtitle_st)
1149 sqsize = is->subtitleq.size;
1151 if (is->audio_st && is->video_st)
1152 av_diff = get_audio_clock(is) - get_video_clock(is);
1153 printf("%7.2f A-V:%7.3f aq=%5dKB vq=%5dKB sq=%5dB \r",
1154 get_master_clock(is), av_diff, aqsize / 1024, vqsize / 1024, sqsize);
1156 last_time = cur_time;
1161 /* allocate a picture (needs to do that in main thread to avoid
1162 potential locking problems */
1163 static void alloc_picture(void *opaque)
1165 VideoState *is = opaque;
1168 vp = &is->pictq[is->pictq_windex];
1171 SDL_FreeYUVOverlay(vp->bmp);
1174 /* XXX: use generic function */
1175 /* XXX: disable overlay if no hardware acceleration or if RGB format */
1176 switch(is->video_st->codec->pix_fmt) {
1177 case PIX_FMT_YUV420P:
1178 case PIX_FMT_YUV422P:
1179 case PIX_FMT_YUV444P:
1180 case PIX_FMT_YUYV422:
1181 case PIX_FMT_YUV410P:
1182 case PIX_FMT_YUV411P:
1190 vp->bmp = SDL_CreateYUVOverlay(is->video_st->codec->width,
1191 is->video_st->codec->height,
1194 vp->width = is->video_st->codec->width;
1195 vp->height = is->video_st->codec->height;
1197 SDL_LockMutex(is->pictq_mutex);
1199 SDL_CondSignal(is->pictq_cond);
1200 SDL_UnlockMutex(is->pictq_mutex);
1205 * @param pts the dts of the pkt / pts of the frame and guessed if not known
1207 static int queue_picture(VideoState *is, AVFrame *src_frame, double pts)
1212 static struct SwsContext *img_convert_ctx;
1214 /* wait until we have space to put a new picture */
1215 SDL_LockMutex(is->pictq_mutex);
1216 while (is->pictq_size >= VIDEO_PICTURE_QUEUE_SIZE &&
1217 !is->videoq.abort_request) {
1218 SDL_CondWait(is->pictq_cond, is->pictq_mutex);
1220 SDL_UnlockMutex(is->pictq_mutex);
1222 if (is->videoq.abort_request)
1225 vp = &is->pictq[is->pictq_windex];
1227 /* alloc or resize hardware picture buffer */
1229 vp->width != is->video_st->codec->width ||
1230 vp->height != is->video_st->codec->height) {
1235 /* the allocation must be done in the main thread to avoid
1237 event.type = FF_ALLOC_EVENT;
1238 event.user.data1 = is;
1239 SDL_PushEvent(&event);
1241 /* wait until the picture is allocated */
1242 SDL_LockMutex(is->pictq_mutex);
1243 while (!vp->allocated && !is->videoq.abort_request) {
1244 SDL_CondWait(is->pictq_cond, is->pictq_mutex);
1246 SDL_UnlockMutex(is->pictq_mutex);
1248 if (is->videoq.abort_request)
1252 /* if the frame is not skipped, then display it */
1254 /* get a pointer on the bitmap */
1255 SDL_LockYUVOverlay (vp->bmp);
1257 dst_pix_fmt = PIX_FMT_YUV420P;
1258 pict.data[0] = vp->bmp->pixels[0];
1259 pict.data[1] = vp->bmp->pixels[2];
1260 pict.data[2] = vp->bmp->pixels[1];
1262 pict.linesize[0] = vp->bmp->pitches[0];
1263 pict.linesize[1] = vp->bmp->pitches[2];
1264 pict.linesize[2] = vp->bmp->pitches[1];
1265 img_convert_ctx = sws_getCachedContext(img_convert_ctx,
1266 is->video_st->codec->width, is->video_st->codec->height,
1267 is->video_st->codec->pix_fmt,
1268 is->video_st->codec->width, is->video_st->codec->height,
1269 dst_pix_fmt, sws_flags, NULL, NULL, NULL);
1270 if (img_convert_ctx == NULL) {
1271 fprintf(stderr, "Cannot initialize the conversion context\n");
1274 sws_scale(img_convert_ctx, src_frame->data, src_frame->linesize,
1275 0, is->video_st->codec->height, pict.data, pict.linesize);
1276 /* update the bitmap content */
1277 SDL_UnlockYUVOverlay(vp->bmp);
1281 /* now we can update the picture count */
1282 if (++is->pictq_windex == VIDEO_PICTURE_QUEUE_SIZE)
1283 is->pictq_windex = 0;
1284 SDL_LockMutex(is->pictq_mutex);
1286 SDL_UnlockMutex(is->pictq_mutex);
1292 * compute the exact PTS for the picture if it is omitted in the stream
1293 * @param pts1 the dts of the pkt / pts of the frame
1295 static int output_picture2(VideoState *is, AVFrame *src_frame, double pts1)
1297 double frame_delay, pts;
1302 /* update video clock with pts, if present */
1303 is->video_clock = pts;
1305 pts = is->video_clock;
1307 /* update video clock for next frame */
1308 frame_delay = av_q2d(is->video_st->codec->time_base);
1309 /* for MPEG2, the frame can be repeated, so we update the
1310 clock accordingly */
1311 frame_delay += src_frame->repeat_pict * (frame_delay * 0.5);
1312 is->video_clock += frame_delay;
1314 #if defined(DEBUG_SYNC) && 0
1317 if (src_frame->pict_type == FF_B_TYPE)
1319 else if (src_frame->pict_type == FF_I_TYPE)
1323 printf("frame_type=%c clock=%0.3f pts=%0.3f\n",
1327 return queue_picture(is, src_frame, pts);
1330 static uint64_t global_video_pkt_pts= AV_NOPTS_VALUE;
1332 static int my_get_buffer(struct AVCodecContext *c, AVFrame *pic){
1333 int ret= avcodec_default_get_buffer(c, pic);
1334 uint64_t *pts= av_malloc(sizeof(uint64_t));
1335 *pts= global_video_pkt_pts;
1340 static void my_release_buffer(struct AVCodecContext *c, AVFrame *pic){
1341 if(pic) av_freep(&pic->opaque);
1342 avcodec_default_release_buffer(c, pic);
1345 static int video_thread(void *arg)
1347 VideoState *is = arg;
1348 AVPacket pkt1, *pkt = &pkt1;
1349 int len1, got_picture;
1350 AVFrame *frame= avcodec_alloc_frame();
1354 while (is->paused && !is->videoq.abort_request) {
1357 if (packet_queue_get(&is->videoq, pkt, 1) < 0)
1360 if(pkt->data == flush_pkt.data){
1361 avcodec_flush_buffers(is->video_st->codec);
1365 /* NOTE: ipts is the PTS of the _first_ picture beginning in
1366 this packet, if any */
1367 global_video_pkt_pts= pkt->pts;
1368 len1 = avcodec_decode_video(is->video_st->codec,
1369 frame, &got_picture,
1370 pkt->data, pkt->size);
1372 if( (decoder_reorder_pts || pkt->dts == AV_NOPTS_VALUE)
1373 && frame->opaque && *(uint64_t*)frame->opaque != AV_NOPTS_VALUE)
1374 pts= *(uint64_t*)frame->opaque;
1375 else if(pkt->dts != AV_NOPTS_VALUE)
1379 pts *= av_q2d(is->video_st->time_base);
1384 if (output_picture2(is, frame, pts) < 0)
1387 av_free_packet(pkt);
1390 stream_pause(cur_stream);
1397 static int subtitle_thread(void *arg)
1399 VideoState *is = arg;
1401 AVPacket pkt1, *pkt = &pkt1;
1402 int len1, got_subtitle;
1405 int r, g, b, y, u, v, a;
1408 while (is->paused && !is->subtitleq.abort_request) {
1411 if (packet_queue_get(&is->subtitleq, pkt, 1) < 0)
1414 if(pkt->data == flush_pkt.data){
1415 avcodec_flush_buffers(is->subtitle_st->codec);
1418 SDL_LockMutex(is->subpq_mutex);
1419 while (is->subpq_size >= SUBPICTURE_QUEUE_SIZE &&
1420 !is->subtitleq.abort_request) {
1421 SDL_CondWait(is->subpq_cond, is->subpq_mutex);
1423 SDL_UnlockMutex(is->subpq_mutex);
1425 if (is->subtitleq.abort_request)
1428 sp = &is->subpq[is->subpq_windex];
1430 /* NOTE: ipts is the PTS of the _first_ picture beginning in
1431 this packet, if any */
1433 if (pkt->pts != AV_NOPTS_VALUE)
1434 pts = av_q2d(is->subtitle_st->time_base)*pkt->pts;
1436 len1 = avcodec_decode_subtitle(is->subtitle_st->codec,
1437 &sp->sub, &got_subtitle,
1438 pkt->data, pkt->size);
1441 if (got_subtitle && sp->sub.format == 0) {
1444 for (i = 0; i < sp->sub.num_rects; i++)
1446 for (j = 0; j < sp->sub.rects[i].nb_colors; j++)
1448 RGBA_IN(r, g, b, a, sp->sub.rects[i].rgba_palette + j);
1449 y = RGB_TO_Y_CCIR(r, g, b);
1450 u = RGB_TO_U_CCIR(r, g, b, 0);
1451 v = RGB_TO_V_CCIR(r, g, b, 0);
1452 YUVA_OUT(sp->sub.rects[i].rgba_palette + j, y, u, v, a);
1456 /* now we can update the picture count */
1457 if (++is->subpq_windex == SUBPICTURE_QUEUE_SIZE)
1458 is->subpq_windex = 0;
1459 SDL_LockMutex(is->subpq_mutex);
1461 SDL_UnlockMutex(is->subpq_mutex);
1463 av_free_packet(pkt);
1466 // stream_pause(cur_stream);
1472 /* copy samples for viewing in editor window */
1473 static void update_sample_display(VideoState *is, short *samples, int samples_size)
1475 int size, len, channels;
1477 channels = is->audio_st->codec->channels;
1479 size = samples_size / sizeof(short);
1481 len = SAMPLE_ARRAY_SIZE - is->sample_array_index;
1484 memcpy(is->sample_array + is->sample_array_index, samples, len * sizeof(short));
1486 is->sample_array_index += len;
1487 if (is->sample_array_index >= SAMPLE_ARRAY_SIZE)
1488 is->sample_array_index = 0;
1493 /* return the new audio buffer size (samples can be added or deleted
1494 to get better sync if video or external master clock) */
1495 static int synchronize_audio(VideoState *is, short *samples,
1496 int samples_size1, double pts)
1498 int n, samples_size;
1501 n = 2 * is->audio_st->codec->channels;
1502 samples_size = samples_size1;
1504 /* if not master, then we try to remove or add samples to correct the clock */
1505 if (((is->av_sync_type == AV_SYNC_VIDEO_MASTER && is->video_st) ||
1506 is->av_sync_type == AV_SYNC_EXTERNAL_CLOCK)) {
1507 double diff, avg_diff;
1508 int wanted_size, min_size, max_size, nb_samples;
1510 ref_clock = get_master_clock(is);
1511 diff = get_audio_clock(is) - ref_clock;
1513 if (diff < AV_NOSYNC_THRESHOLD) {
1514 is->audio_diff_cum = diff + is->audio_diff_avg_coef * is->audio_diff_cum;
1515 if (is->audio_diff_avg_count < AUDIO_DIFF_AVG_NB) {
1516 /* not enough measures to have a correct estimate */
1517 is->audio_diff_avg_count++;
1519 /* estimate the A-V difference */
1520 avg_diff = is->audio_diff_cum * (1.0 - is->audio_diff_avg_coef);
1522 if (fabs(avg_diff) >= is->audio_diff_threshold) {
1523 wanted_size = samples_size + ((int)(diff * is->audio_st->codec->sample_rate) * n);
1524 nb_samples = samples_size / n;
1526 min_size = ((nb_samples * (100 - SAMPLE_CORRECTION_PERCENT_MAX)) / 100) * n;
1527 max_size = ((nb_samples * (100 + SAMPLE_CORRECTION_PERCENT_MAX)) / 100) * n;
1528 if (wanted_size < min_size)
1529 wanted_size = min_size;
1530 else if (wanted_size > max_size)
1531 wanted_size = max_size;
1533 /* add or remove samples to correction the synchro */
1534 if (wanted_size < samples_size) {
1535 /* remove samples */
1536 samples_size = wanted_size;
1537 } else if (wanted_size > samples_size) {
1538 uint8_t *samples_end, *q;
1542 nb = (samples_size - wanted_size);
1543 samples_end = (uint8_t *)samples + samples_size - n;
1544 q = samples_end + n;
1546 memcpy(q, samples_end, n);
1550 samples_size = wanted_size;
1554 printf("diff=%f adiff=%f sample_diff=%d apts=%0.3f vpts=%0.3f %f\n",
1555 diff, avg_diff, samples_size - samples_size1,
1556 is->audio_clock, is->video_clock, is->audio_diff_threshold);
1560 /* too big difference : may be initial PTS errors, so
1562 is->audio_diff_avg_count = 0;
1563 is->audio_diff_cum = 0;
1567 return samples_size;
1570 /* decode one audio frame and returns its uncompressed size */
1571 static int audio_decode_frame(VideoState *is, uint8_t *audio_buf, int buf_size, double *pts_ptr)
1573 AVPacket *pkt = &is->audio_pkt;
1574 int n, len1, data_size;
1578 /* NOTE: the audio packet can contain several frames */
1579 while (is->audio_pkt_size > 0) {
1580 data_size = buf_size;
1581 len1 = avcodec_decode_audio2(is->audio_st->codec,
1582 (int16_t *)audio_buf, &data_size,
1583 is->audio_pkt_data, is->audio_pkt_size);
1585 /* if error, we skip the frame */
1586 is->audio_pkt_size = 0;
1590 is->audio_pkt_data += len1;
1591 is->audio_pkt_size -= len1;
1594 /* if no pts, then compute it */
1595 pts = is->audio_clock;
1597 n = 2 * is->audio_st->codec->channels;
1598 is->audio_clock += (double)data_size /
1599 (double)(n * is->audio_st->codec->sample_rate);
1600 #if defined(DEBUG_SYNC)
1602 static double last_clock;
1603 printf("audio: delay=%0.3f clock=%0.3f pts=%0.3f\n",
1604 is->audio_clock - last_clock,
1605 is->audio_clock, pts);
1606 last_clock = is->audio_clock;
1612 /* free the current packet */
1614 av_free_packet(pkt);
1616 if (is->paused || is->audioq.abort_request) {
1620 /* read next packet */
1621 if (packet_queue_get(&is->audioq, pkt, 1) < 0)
1623 if(pkt->data == flush_pkt.data){
1624 avcodec_flush_buffers(is->audio_st->codec);
1628 is->audio_pkt_data = pkt->data;
1629 is->audio_pkt_size = pkt->size;
1631 /* if update the audio clock with the pts */
1632 if (pkt->pts != AV_NOPTS_VALUE) {
1633 is->audio_clock = av_q2d(is->audio_st->time_base)*pkt->pts;
1638 /* get the current audio output buffer size, in samples. With SDL, we
1639 cannot have a precise information */
1640 static int audio_write_get_buf_size(VideoState *is)
1642 return is->audio_buf_size - is->audio_buf_index;
1646 /* prepare a new audio buffer */
1647 static void sdl_audio_callback(void *opaque, Uint8 *stream, int len)
1649 VideoState *is = opaque;
1650 int audio_size, len1;
1653 audio_callback_time = av_gettime();
1656 if (is->audio_buf_index >= is->audio_buf_size) {
1657 audio_size = audio_decode_frame(is, is->audio_buf, sizeof(is->audio_buf), &pts);
1658 if (audio_size < 0) {
1659 /* if error, just output silence */
1660 is->audio_buf_size = 1024;
1661 memset(is->audio_buf, 0, is->audio_buf_size);
1664 update_sample_display(is, (int16_t *)is->audio_buf, audio_size);
1665 audio_size = synchronize_audio(is, (int16_t *)is->audio_buf, audio_size,
1667 is->audio_buf_size = audio_size;
1669 is->audio_buf_index = 0;
1671 len1 = is->audio_buf_size - is->audio_buf_index;
1674 memcpy(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, len1);
1677 is->audio_buf_index += len1;
1681 /* open a given stream. Return 0 if OK */
1682 static int stream_component_open(VideoState *is, int stream_index)
1684 AVFormatContext *ic = is->ic;
1685 AVCodecContext *enc;
1687 SDL_AudioSpec wanted_spec, spec;
1689 if (stream_index < 0 || stream_index >= ic->nb_streams)
1691 enc = ic->streams[stream_index]->codec;
1693 /* prepare audio output */
1694 if (enc->codec_type == CODEC_TYPE_AUDIO) {
1695 if (enc->channels > 0) {
1696 enc->request_channels = FFMIN(2, enc->channels);
1698 enc->request_channels = 2;
1702 codec = avcodec_find_decoder(enc->codec_id);
1703 enc->debug_mv = debug_mv;
1705 enc->workaround_bugs = workaround_bugs;
1706 enc->lowres = lowres;
1707 if(lowres) enc->flags |= CODEC_FLAG_EMU_EDGE;
1708 enc->idct_algo= idct;
1709 if(fast) enc->flags2 |= CODEC_FLAG2_FAST;
1710 enc->skip_frame= skip_frame;
1711 enc->skip_idct= skip_idct;
1712 enc->skip_loop_filter= skip_loop_filter;
1713 enc->error_resilience= error_resilience;
1714 enc->error_concealment= error_concealment;
1716 avcodec_open(enc, codec) < 0)
1719 /* prepare audio output */
1720 if (enc->codec_type == CODEC_TYPE_AUDIO) {
1721 wanted_spec.freq = enc->sample_rate;
1722 wanted_spec.format = AUDIO_S16SYS;
1723 wanted_spec.channels = enc->channels;
1724 wanted_spec.silence = 0;
1725 wanted_spec.samples = SDL_AUDIO_BUFFER_SIZE;
1726 wanted_spec.callback = sdl_audio_callback;
1727 wanted_spec.userdata = is;
1728 if (SDL_OpenAudio(&wanted_spec, &spec) < 0) {
1729 fprintf(stderr, "SDL_OpenAudio: %s\n", SDL_GetError());
1732 is->audio_hw_buf_size = spec.size;
1736 avcodec_thread_init(enc, thread_count);
1737 enc->thread_count= thread_count;
1738 switch(enc->codec_type) {
1739 case CODEC_TYPE_AUDIO:
1740 is->audio_stream = stream_index;
1741 is->audio_st = ic->streams[stream_index];
1742 is->audio_buf_size = 0;
1743 is->audio_buf_index = 0;
1745 /* init averaging filter */
1746 is->audio_diff_avg_coef = exp(log(0.01) / AUDIO_DIFF_AVG_NB);
1747 is->audio_diff_avg_count = 0;
1748 /* since we do not have a precise anough audio fifo fullness,
1749 we correct audio sync only if larger than this threshold */
1750 is->audio_diff_threshold = 2.0 * SDL_AUDIO_BUFFER_SIZE / enc->sample_rate;
1752 memset(&is->audio_pkt, 0, sizeof(is->audio_pkt));
1753 packet_queue_init(&is->audioq);
1756 case CODEC_TYPE_VIDEO:
1757 is->video_stream = stream_index;
1758 is->video_st = ic->streams[stream_index];
1760 is->frame_last_delay = 40e-3;
1761 is->frame_timer = (double)av_gettime() / 1000000.0;
1762 is->video_current_pts_time = av_gettime();
1764 packet_queue_init(&is->videoq);
1765 is->video_tid = SDL_CreateThread(video_thread, is);
1767 enc-> get_buffer= my_get_buffer;
1768 enc->release_buffer= my_release_buffer;
1770 case CODEC_TYPE_SUBTITLE:
1771 is->subtitle_stream = stream_index;
1772 is->subtitle_st = ic->streams[stream_index];
1773 packet_queue_init(&is->subtitleq);
1775 is->subtitle_tid = SDL_CreateThread(subtitle_thread, is);
1783 static void stream_component_close(VideoState *is, int stream_index)
1785 AVFormatContext *ic = is->ic;
1786 AVCodecContext *enc;
1788 if (stream_index < 0 || stream_index >= ic->nb_streams)
1790 enc = ic->streams[stream_index]->codec;
1792 switch(enc->codec_type) {
1793 case CODEC_TYPE_AUDIO:
1794 packet_queue_abort(&is->audioq);
1798 packet_queue_end(&is->audioq);
1800 case CODEC_TYPE_VIDEO:
1801 packet_queue_abort(&is->videoq);
1803 /* note: we also signal this mutex to make sure we deblock the
1804 video thread in all cases */
1805 SDL_LockMutex(is->pictq_mutex);
1806 SDL_CondSignal(is->pictq_cond);
1807 SDL_UnlockMutex(is->pictq_mutex);
1809 SDL_WaitThread(is->video_tid, NULL);
1811 packet_queue_end(&is->videoq);
1813 case CODEC_TYPE_SUBTITLE:
1814 packet_queue_abort(&is->subtitleq);
1816 /* note: we also signal this mutex to make sure we deblock the
1817 video thread in all cases */
1818 SDL_LockMutex(is->subpq_mutex);
1819 is->subtitle_stream_changed = 1;
1821 SDL_CondSignal(is->subpq_cond);
1822 SDL_UnlockMutex(is->subpq_mutex);
1824 SDL_WaitThread(is->subtitle_tid, NULL);
1826 packet_queue_end(&is->subtitleq);
1833 switch(enc->codec_type) {
1834 case CODEC_TYPE_AUDIO:
1835 is->audio_st = NULL;
1836 is->audio_stream = -1;
1838 case CODEC_TYPE_VIDEO:
1839 is->video_st = NULL;
1840 is->video_stream = -1;
1842 case CODEC_TYPE_SUBTITLE:
1843 is->subtitle_st = NULL;
1844 is->subtitle_stream = -1;
1851 static void dump_stream_info(const AVFormatContext *s)
1854 fprintf(stderr, "Track: %d\n", s->track);
1855 if (s->title[0] != '\0')
1856 fprintf(stderr, "Title: %s\n", s->title);
1857 if (s->author[0] != '\0')
1858 fprintf(stderr, "Author: %s\n", s->author);
1859 if (s->copyright[0] != '\0')
1860 fprintf(stderr, "Copyright: %s\n", s->copyright);
1861 if (s->comment[0] != '\0')
1862 fprintf(stderr, "Comment: %s\n", s->comment);
1863 if (s->album[0] != '\0')
1864 fprintf(stderr, "Album: %s\n", s->album);
1866 fprintf(stderr, "Year: %d\n", s->year);
1867 if (s->genre[0] != '\0')
1868 fprintf(stderr, "Genre: %s\n", s->genre);
1871 /* since we have only one decoding thread, we can use a global
1872 variable instead of a thread local variable */
1873 static VideoState *global_video_state;
1875 static int decode_interrupt_cb(void)
1877 return (global_video_state && global_video_state->abort_request);
1880 /* this thread gets the stream from the disk or the network */
1881 static int decode_thread(void *arg)
1883 VideoState *is = arg;
1884 AVFormatContext *ic;
1885 int err, i, ret, video_index, audio_index;
1886 AVPacket pkt1, *pkt = &pkt1;
1887 AVFormatParameters params, *ap = ¶ms;
1891 is->video_stream = -1;
1892 is->audio_stream = -1;
1893 is->subtitle_stream = -1;
1895 global_video_state = is;
1896 url_set_interrupt_cb(decode_interrupt_cb);
1898 memset(ap, 0, sizeof(*ap));
1900 ap->width = frame_width;
1901 ap->height= frame_height;
1902 ap->time_base= (AVRational){1, 25};
1903 ap->pix_fmt = frame_pix_fmt;
1905 err = av_open_input_file(&ic, is->filename, is->iformat, 0, ap);
1907 print_error(is->filename, err);
1914 ic->flags |= AVFMT_FLAG_GENPTS;
1916 err = av_find_stream_info(ic);
1918 fprintf(stderr, "%s: could not find codec parameters\n", is->filename);
1923 ic->pb->eof_reached= 0; //FIXME hack, ffplay maybe should not use url_feof() to test for the end
1925 /* if seeking requested, we execute it */
1926 if (start_time != AV_NOPTS_VALUE) {
1929 timestamp = start_time;
1930 /* add the stream start time */
1931 if (ic->start_time != AV_NOPTS_VALUE)
1932 timestamp += ic->start_time;
1933 ret = av_seek_frame(ic, -1, timestamp, AVSEEK_FLAG_BACKWARD);
1935 fprintf(stderr, "%s: could not seek to position %0.3f\n",
1936 is->filename, (double)timestamp / AV_TIME_BASE);
1940 for(i = 0; i < ic->nb_streams; i++) {
1941 AVCodecContext *enc = ic->streams[i]->codec;
1942 switch(enc->codec_type) {
1943 case CODEC_TYPE_AUDIO:
1944 if ((audio_index < 0 || wanted_audio_stream-- > 0) && !audio_disable)
1947 case CODEC_TYPE_VIDEO:
1948 if ((video_index < 0 || wanted_video_stream-- > 0) && !video_disable)
1956 dump_format(ic, 0, is->filename, 0);
1957 dump_stream_info(ic);
1960 /* open the streams */
1961 if (audio_index >= 0) {
1962 stream_component_open(is, audio_index);
1965 if (video_index >= 0) {
1966 stream_component_open(is, video_index);
1968 if (!display_disable)
1972 if (is->video_stream < 0 && is->audio_stream < 0) {
1973 fprintf(stderr, "%s: could not open codecs\n", is->filename);
1979 if (is->abort_request)
1981 if (is->paused != is->last_paused) {
1982 is->last_paused = is->paused;
1988 #if defined(CONFIG_RTSP_DEMUXER) || defined(CONFIG_MMSH_PROTOCOL)
1990 (!strcmp(ic->iformat->name, "rtsp") ||
1991 (ic->pb && !strcmp(url_fileno(ic->pb)->prot->name, "mmsh")))) {
1992 /* wait 10 ms to avoid trying to get another packet */
1999 int stream_index= -1;
2000 int64_t seek_target= is->seek_pos;
2002 if (is-> video_stream >= 0) stream_index= is-> video_stream;
2003 else if(is-> audio_stream >= 0) stream_index= is-> audio_stream;
2004 else if(is->subtitle_stream >= 0) stream_index= is->subtitle_stream;
2006 if(stream_index>=0){
2007 seek_target= av_rescale_q(seek_target, AV_TIME_BASE_Q, ic->streams[stream_index]->time_base);
2010 ret = av_seek_frame(is->ic, stream_index, seek_target, is->seek_flags);
2012 fprintf(stderr, "%s: error while seeking\n", is->ic->filename);
2014 if (is->audio_stream >= 0) {
2015 packet_queue_flush(&is->audioq);
2016 packet_queue_put(&is->audioq, &flush_pkt);
2018 if (is->subtitle_stream >= 0) {
2019 packet_queue_flush(&is->subtitleq);
2020 packet_queue_put(&is->subtitleq, &flush_pkt);
2022 if (is->video_stream >= 0) {
2023 packet_queue_flush(&is->videoq);
2024 packet_queue_put(&is->videoq, &flush_pkt);
2030 /* if the queue are full, no need to read more */
2031 if (is->audioq.size > MAX_AUDIOQ_SIZE ||
2032 is->videoq.size > MAX_VIDEOQ_SIZE ||
2033 is->subtitleq.size > MAX_SUBTITLEQ_SIZE ||
2039 ret = av_read_frame(ic, pkt);
2041 if (url_ferror(ic->pb) == 0) {
2042 SDL_Delay(100); /* wait for user event */
2047 if (pkt->stream_index == is->audio_stream) {
2048 packet_queue_put(&is->audioq, pkt);
2049 } else if (pkt->stream_index == is->video_stream) {
2050 packet_queue_put(&is->videoq, pkt);
2051 } else if (pkt->stream_index == is->subtitle_stream) {
2052 packet_queue_put(&is->subtitleq, pkt);
2054 av_free_packet(pkt);
2057 /* wait until the end */
2058 while (!is->abort_request) {
2064 /* disable interrupting */
2065 global_video_state = NULL;
2067 /* close each stream */
2068 if (is->audio_stream >= 0)
2069 stream_component_close(is, is->audio_stream);
2070 if (is->video_stream >= 0)
2071 stream_component_close(is, is->video_stream);
2072 if (is->subtitle_stream >= 0)
2073 stream_component_close(is, is->subtitle_stream);
2075 av_close_input_file(is->ic);
2076 is->ic = NULL; /* safety */
2078 url_set_interrupt_cb(NULL);
2083 event.type = FF_QUIT_EVENT;
2084 event.user.data1 = is;
2085 SDL_PushEvent(&event);
2090 static VideoState *stream_open(const char *filename, AVInputFormat *iformat)
2094 is = av_mallocz(sizeof(VideoState));
2097 av_strlcpy(is->filename, filename, sizeof(is->filename));
2098 is->iformat = iformat;
2102 /* start video display */
2103 is->pictq_mutex = SDL_CreateMutex();
2104 is->pictq_cond = SDL_CreateCond();
2106 is->subpq_mutex = SDL_CreateMutex();
2107 is->subpq_cond = SDL_CreateCond();
2109 /* add the refresh timer to draw the picture */
2110 schedule_refresh(is, 40);
2112 is->av_sync_type = av_sync_type;
2113 is->parse_tid = SDL_CreateThread(decode_thread, is);
2114 if (!is->parse_tid) {
2121 static void stream_close(VideoState *is)
2125 /* XXX: use a special url_shutdown call to abort parse cleanly */
2126 is->abort_request = 1;
2127 SDL_WaitThread(is->parse_tid, NULL);
2129 /* free all pictures */
2130 for(i=0;i<VIDEO_PICTURE_QUEUE_SIZE; i++) {
2133 SDL_FreeYUVOverlay(vp->bmp);
2137 SDL_DestroyMutex(is->pictq_mutex);
2138 SDL_DestroyCond(is->pictq_cond);
2139 SDL_DestroyMutex(is->subpq_mutex);
2140 SDL_DestroyCond(is->subpq_cond);
2143 static void stream_cycle_channel(VideoState *is, int codec_type)
2145 AVFormatContext *ic = is->ic;
2146 int start_index, stream_index;
2149 if (codec_type == CODEC_TYPE_VIDEO)
2150 start_index = is->video_stream;
2151 else if (codec_type == CODEC_TYPE_AUDIO)
2152 start_index = is->audio_stream;
2154 start_index = is->subtitle_stream;
2155 if (start_index < (codec_type == CODEC_TYPE_SUBTITLE ? -1 : 0))
2157 stream_index = start_index;
2159 if (++stream_index >= is->ic->nb_streams)
2161 if (codec_type == CODEC_TYPE_SUBTITLE)
2168 if (stream_index == start_index)
2170 st = ic->streams[stream_index];
2171 if (st->codec->codec_type == codec_type) {
2172 /* check that parameters are OK */
2173 switch(codec_type) {
2174 case CODEC_TYPE_AUDIO:
2175 if (st->codec->sample_rate != 0 &&
2176 st->codec->channels != 0)
2179 case CODEC_TYPE_VIDEO:
2180 case CODEC_TYPE_SUBTITLE:
2188 stream_component_close(is, start_index);
2189 stream_component_open(is, stream_index);
2193 static void toggle_full_screen(void)
2195 is_full_screen = !is_full_screen;
2196 if (!fs_screen_width) {
2197 /* use default SDL method */
2198 // SDL_WM_ToggleFullScreen(screen);
2200 video_open(cur_stream);
2203 static void toggle_pause(void)
2206 stream_pause(cur_stream);
2210 static void step_to_next_frame(void)
2213 /* if the stream is paused unpause it, then step */
2214 if (cur_stream->paused)
2215 stream_pause(cur_stream);
2220 static void do_exit(void)
2223 stream_close(cur_stream);
2232 static void toggle_audio_display(void)
2235 cur_stream->show_audio = !cur_stream->show_audio;
2239 /* handle an event sent by the GUI */
2240 static void event_loop(void)
2243 double incr, pos, frac;
2246 SDL_WaitEvent(&event);
2247 switch(event.type) {
2249 switch(event.key.keysym.sym) {
2255 toggle_full_screen();
2261 case SDLK_s: //S: Step to next frame
2262 step_to_next_frame();
2266 stream_cycle_channel(cur_stream, CODEC_TYPE_AUDIO);
2270 stream_cycle_channel(cur_stream, CODEC_TYPE_VIDEO);
2274 stream_cycle_channel(cur_stream, CODEC_TYPE_SUBTITLE);
2277 toggle_audio_display();
2292 if (seek_by_bytes) {
2293 pos = url_ftell(cur_stream->ic->pb);
2294 if (cur_stream->ic->bit_rate)
2295 incr *= cur_stream->ic->bit_rate / 60.0;
2299 stream_seek(cur_stream, pos, incr);
2301 pos = get_master_clock(cur_stream);
2303 stream_seek(cur_stream, (int64_t)(pos * AV_TIME_BASE), incr);
2311 case SDL_MOUSEBUTTONDOWN:
2314 int tns, thh, tmm, tss;
2315 tns = cur_stream->ic->duration/1000000LL;
2317 tmm = (tns%3600)/60;
2319 frac = (double)event.button.x/(double)cur_stream->width;
2324 fprintf(stderr, "Seek to %2.0f%% (%2d:%02d:%02d) of total duration (%2d:%02d:%02d) \n", frac*100,
2325 hh, mm, ss, thh, tmm, tss);
2326 stream_seek(cur_stream, (int64_t)(cur_stream->ic->start_time+frac*cur_stream->ic->duration), 0);
2329 case SDL_VIDEORESIZE:
2331 screen = SDL_SetVideoMode(event.resize.w, event.resize.h, 0,
2332 SDL_HWSURFACE|SDL_RESIZABLE|SDL_ASYNCBLIT|SDL_HWACCEL);
2333 screen_width = cur_stream->width = event.resize.w;
2334 screen_height= cur_stream->height= event.resize.h;
2341 case FF_ALLOC_EVENT:
2342 video_open(event.user.data1);
2343 alloc_picture(event.user.data1);
2345 case FF_REFRESH_EVENT:
2346 video_refresh_timer(event.user.data1);
2354 static void opt_frame_size(const char *arg)
2356 if (av_parse_video_frame_size(&frame_width, &frame_height, arg) < 0) {
2357 fprintf(stderr, "Incorrect frame size\n");
2360 if ((frame_width % 2) != 0 || (frame_height % 2) != 0) {
2361 fprintf(stderr, "Frame size must be a multiple of 2\n");
2366 static int opt_width(const char *opt, const char *arg)
2368 screen_width = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
2372 static int opt_height(const char *opt, const char *arg)
2374 screen_height = parse_number_or_die(opt, arg, OPT_INT64, 1, INT_MAX);
2378 static void opt_format(const char *arg)
2380 file_iformat = av_find_input_format(arg);
2381 if (!file_iformat) {
2382 fprintf(stderr, "Unknown input format: %s\n", arg);
2387 static void opt_frame_pix_fmt(const char *arg)
2389 frame_pix_fmt = avcodec_get_pix_fmt(arg);
2392 static int opt_sync(const char *opt, const char *arg)
2394 if (!strcmp(arg, "audio"))
2395 av_sync_type = AV_SYNC_AUDIO_MASTER;
2396 else if (!strcmp(arg, "video"))
2397 av_sync_type = AV_SYNC_VIDEO_MASTER;
2398 else if (!strcmp(arg, "ext"))
2399 av_sync_type = AV_SYNC_EXTERNAL_CLOCK;
2401 fprintf(stderr, "Unknown value for %s: %s\n", opt, arg);
2407 static int opt_seek(const char *opt, const char *arg)
2409 start_time = parse_time_or_die(opt, arg, 1);
2413 static int opt_debug(const char *opt, const char *arg)
2415 av_log_set_level(99);
2416 debug = parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);
2420 static int opt_vismv(const char *opt, const char *arg)
2422 debug_mv = parse_number_or_die(opt, arg, OPT_INT64, INT_MIN, INT_MAX);
2426 static int opt_thread_count(const char *opt, const char *arg)
2428 thread_count= parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);
2429 #if !defined(HAVE_THREADS)
2430 fprintf(stderr, "Warning: not compiled with thread support, using thread emulation\n");
2435 static const OptionDef options[] = {
2436 { "h", OPT_EXIT, {(void*)show_help}, "show help" },
2437 { "version", OPT_EXIT, {(void*)show_version}, "show version" },
2438 { "L", OPT_EXIT, {(void*)show_license}, "show license" },
2439 { "formats", OPT_EXIT, {(void*)show_formats}, "show available formats, codecs, protocols, ..." },
2440 { "x", HAS_ARG | OPT_FUNC2, {(void*)opt_width}, "force displayed width", "width" },
2441 { "y", HAS_ARG | OPT_FUNC2, {(void*)opt_height}, "force displayed height", "height" },
2442 { "s", HAS_ARG | OPT_VIDEO, {(void*)opt_frame_size}, "set frame size (WxH or abbreviation)", "size" },
2443 { "fs", OPT_BOOL, {(void*)&is_full_screen}, "force full screen" },
2444 { "an", OPT_BOOL, {(void*)&audio_disable}, "disable audio" },
2445 { "vn", OPT_BOOL, {(void*)&video_disable}, "disable video" },
2446 { "ast", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&wanted_audio_stream}, "", "" },
2447 { "vst", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&wanted_video_stream}, "", "" },
2448 { "ss", HAS_ARG | OPT_FUNC2, {(void*)&opt_seek}, "seek to a given position in seconds", "pos" },
2449 { "bytes", OPT_BOOL, {(void*)&seek_by_bytes}, "seek by bytes" },
2450 { "nodisp", OPT_BOOL, {(void*)&display_disable}, "disable graphical display" },
2451 { "f", HAS_ARG, {(void*)opt_format}, "force format", "fmt" },
2452 { "pix_fmt", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_frame_pix_fmt}, "set pixel format", "format" },
2453 { "stats", OPT_BOOL | OPT_EXPERT, {(void*)&show_status}, "show status", "" },
2454 { "debug", HAS_ARG | OPT_FUNC2 | OPT_EXPERT, {(void*)opt_debug}, "print specific debug info", "" },
2455 { "bug", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&workaround_bugs}, "workaround bugs", "" },
2456 { "vismv", HAS_ARG | OPT_FUNC2 | OPT_EXPERT, {(void*)opt_vismv}, "visualize motion vectors", "" },
2457 { "fast", OPT_BOOL | OPT_EXPERT, {(void*)&fast}, "non spec compliant optimizations", "" },
2458 { "genpts", OPT_BOOL | OPT_EXPERT, {(void*)&genpts}, "generate pts", "" },
2459 { "drp", OPT_BOOL |OPT_EXPERT, {(void*)&decoder_reorder_pts}, "let decoder reorder pts", ""},
2460 { "lowres", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&lowres}, "", "" },
2461 { "skiploop", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&skip_loop_filter}, "", "" },
2462 { "skipframe", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&skip_frame}, "", "" },
2463 { "skipidct", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&skip_idct}, "", "" },
2464 { "idct", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&idct}, "set idct algo", "algo" },
2465 { "er", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&error_resilience}, "set error detection threshold (0-4)", "threshold" },
2466 { "ec", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&error_concealment}, "set error concealment options", "bit_mask" },
2467 { "sync", HAS_ARG | OPT_FUNC2 | OPT_EXPERT, {(void*)opt_sync}, "set audio-video sync. type (type=audio/video/ext)", "type" },
2468 { "threads", HAS_ARG | OPT_FUNC2 | OPT_EXPERT, {(void*)opt_thread_count}, "thread count", "count" },
2472 static void show_help(void)
2474 printf("usage: ffplay [options] input_file\n"
2475 "Simple media player\n");
2477 show_help_options(options, "Main options:\n",
2479 show_help_options(options, "\nAdvanced options:\n",
2480 OPT_EXPERT, OPT_EXPERT);
2481 printf("\nWhile playing:\n"
2483 "f toggle full screen\n"
2485 "a cycle audio channel\n"
2486 "v cycle video channel\n"
2487 "t cycle subtitle channel\n"
2488 "w show audio waves\n"
2489 "left/right seek backward/forward 10 seconds\n"
2490 "down/up seek backward/forward 1 minute\n"
2491 "mouse click seek to percentage in file corresponding to fraction of width\n"
2495 static void opt_input_file(const char *filename)
2497 if (!strcmp(filename, "-"))
2499 input_filename = filename;
2502 /* Called from the main */
2503 int main(int argc, char **argv)
2507 /* register all codecs, demux and protocols */
2508 avcodec_register_all();
2509 avdevice_register_all();
2514 parse_options(argc, argv, options, opt_input_file);
2516 if (!input_filename) {
2521 if (display_disable) {
2524 flags = SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER;
2525 #if !defined(__MINGW32__) && !defined(__APPLE__)
2526 flags |= SDL_INIT_EVENTTHREAD; /* Not supported on Windows or Mac OS X */
2528 if (SDL_Init (flags)) {
2529 fprintf(stderr, "Could not initialize SDL - %s\n", SDL_GetError());
2533 if (!display_disable) {
2534 #ifdef HAVE_SDL_VIDEO_SIZE
2535 const SDL_VideoInfo *vi = SDL_GetVideoInfo();
2536 fs_screen_width = vi->current_w;
2537 fs_screen_height = vi->current_h;
2541 SDL_EventState(SDL_ACTIVEEVENT, SDL_IGNORE);
2542 SDL_EventState(SDL_MOUSEMOTION, SDL_IGNORE);
2543 SDL_EventState(SDL_SYSWMEVENT, SDL_IGNORE);
2544 SDL_EventState(SDL_USEREVENT, SDL_IGNORE);
2546 av_init_packet(&flush_pkt);
2547 flush_pkt.data= "FLUSH";
2549 cur_stream = stream_open(input_filename, file_iformat);