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
32 #include <SDL_thread.h>
35 #undef main /* We don't want SDL to override our main() */
42 #define MAX_VIDEOQ_SIZE (5 * 256 * 1024)
43 #define MAX_AUDIOQ_SIZE (5 * 16 * 1024)
44 #define MAX_SUBTITLEQ_SIZE (5 * 16 * 1024)
46 /* SDL audio buffer size, in samples. Should be small to have precise
47 A/V sync as SDL does not have hardware buffer fullness info. */
48 #define SDL_AUDIO_BUFFER_SIZE 1024
50 /* no AV sync correction is done if below the AV sync threshold */
51 #define AV_SYNC_THRESHOLD 0.01
52 /* no AV correction is done if too big error */
53 #define AV_NOSYNC_THRESHOLD 10.0
55 /* maximum audio speed change to get correct sync */
56 #define SAMPLE_CORRECTION_PERCENT_MAX 10
58 /* we use about AUDIO_DIFF_AVG_NB A-V differences to make the average */
59 #define AUDIO_DIFF_AVG_NB 20
61 /* NOTE: the size must be big enough to compensate the hardware audio buffersize size */
62 #define SAMPLE_ARRAY_SIZE (2*65536)
64 static int sws_flags = SWS_BICUBIC;
66 typedef struct PacketQueue {
67 AVPacketList *first_pkt, *last_pkt;
75 #define VIDEO_PICTURE_QUEUE_SIZE 1
76 #define SUBPICTURE_QUEUE_SIZE 4
78 typedef struct VideoPicture {
79 double pts; ///<presentation time stamp for this picture
81 int width, height; /* source height & width */
85 typedef struct SubPicture {
86 double pts; /* presentation time stamp for this picture */
91 AV_SYNC_AUDIO_MASTER, /* default choice */
93 AV_SYNC_EXTERNAL_CLOCK, /* synchronize to an external clock */
96 typedef struct VideoState {
97 SDL_Thread *parse_tid;
98 SDL_Thread *video_tid;
99 AVInputFormat *iformat;
108 int dtg_active_format;
113 double external_clock; /* external clock base */
114 int64_t external_clock_time;
117 double audio_diff_cum; /* used for AV difference average computation */
118 double audio_diff_avg_coef;
119 double audio_diff_threshold;
120 int audio_diff_avg_count;
123 int audio_hw_buf_size;
124 /* samples output by the codec. we reserve more space for avsync
126 DECLARE_ALIGNED(16,uint8_t,audio_buf[(AVCODEC_MAX_AUDIO_FRAME_SIZE * 3) / 2]);
127 unsigned int audio_buf_size; /* in bytes */
128 int audio_buf_index; /* in bytes */
130 uint8_t *audio_pkt_data;
133 int show_audio; /* if true, display audio samples */
134 int16_t sample_array[SAMPLE_ARRAY_SIZE];
135 int sample_array_index;
138 SDL_Thread *subtitle_tid;
140 int subtitle_stream_changed;
141 AVStream *subtitle_st;
142 PacketQueue subtitleq;
143 SubPicture subpq[SUBPICTURE_QUEUE_SIZE];
144 int subpq_size, subpq_rindex, subpq_windex;
145 SDL_mutex *subpq_mutex;
146 SDL_cond *subpq_cond;
149 double frame_last_pts;
150 double frame_last_delay;
151 double video_clock; ///<pts of last decoded frame / predicted pts of next decoded frame
155 double video_current_pts; ///<current displayed pts (different from video_clock if frame fifos are used)
156 int64_t video_current_pts_time; ///<time (av_gettime) at which we updated video_current_pts - used to have running video pts
157 VideoPicture pictq[VIDEO_PICTURE_QUEUE_SIZE];
158 int pictq_size, pictq_rindex, pictq_windex;
159 SDL_mutex *pictq_mutex;
160 SDL_cond *pictq_cond;
162 // QETimer *video_timer;
164 int width, height, xleft, ytop;
167 void show_help(void);
168 static int audio_write_get_buf_size(VideoState *is);
170 /* options specified by the user */
171 static AVInputFormat *file_iformat;
172 static const char *input_filename;
173 static int fs_screen_width;
174 static int fs_screen_height;
175 static int screen_width = 0;
176 static int screen_height = 0;
177 static int frame_width = 0;
178 static int frame_height = 0;
179 static enum PixelFormat frame_pix_fmt = PIX_FMT_NONE;
180 static int audio_disable;
181 static int video_disable;
182 static int wanted_audio_stream= 0;
183 static int wanted_video_stream= 0;
184 static int seek_by_bytes;
185 static int display_disable;
186 static int show_status;
187 static int av_sync_type = AV_SYNC_AUDIO_MASTER;
188 static int64_t start_time = AV_NOPTS_VALUE;
189 static int debug = 0;
190 static int debug_mv = 0;
192 static int thread_count = 1;
193 static int workaround_bugs = 1;
195 static int genpts = 0;
196 static int lowres = 0;
197 static int idct = FF_IDCT_AUTO;
198 static enum AVDiscard skip_frame= AVDISCARD_DEFAULT;
199 static enum AVDiscard skip_idct= AVDISCARD_DEFAULT;
200 static enum AVDiscard skip_loop_filter= AVDISCARD_DEFAULT;
201 static int error_resilience = FF_ER_CAREFUL;
202 static int error_concealment = 3;
203 static int decoder_reorder_pts= 0;
205 /* current context */
206 static int is_full_screen;
207 static VideoState *cur_stream;
208 static int64_t audio_callback_time;
212 #define FF_ALLOC_EVENT (SDL_USEREVENT)
213 #define FF_REFRESH_EVENT (SDL_USEREVENT + 1)
214 #define FF_QUIT_EVENT (SDL_USEREVENT + 2)
218 /* packet queue handling */
219 static void packet_queue_init(PacketQueue *q)
221 memset(q, 0, sizeof(PacketQueue));
222 q->mutex = SDL_CreateMutex();
223 q->cond = SDL_CreateCond();
226 static void packet_queue_flush(PacketQueue *q)
228 AVPacketList *pkt, *pkt1;
230 SDL_LockMutex(q->mutex);
231 for(pkt = q->first_pkt; pkt != NULL; pkt = pkt1) {
233 av_free_packet(&pkt->pkt);
240 SDL_UnlockMutex(q->mutex);
243 static void packet_queue_end(PacketQueue *q)
245 packet_queue_flush(q);
246 SDL_DestroyMutex(q->mutex);
247 SDL_DestroyCond(q->cond);
250 static int packet_queue_put(PacketQueue *q, AVPacket *pkt)
254 /* duplicate the packet */
255 if (pkt!=&flush_pkt && av_dup_packet(pkt) < 0)
258 pkt1 = av_malloc(sizeof(AVPacketList));
265 SDL_LockMutex(q->mutex);
271 q->last_pkt->next = pkt1;
274 q->size += pkt1->pkt.size;
275 /* XXX: should duplicate packet data in DV case */
276 SDL_CondSignal(q->cond);
278 SDL_UnlockMutex(q->mutex);
282 static void packet_queue_abort(PacketQueue *q)
284 SDL_LockMutex(q->mutex);
286 q->abort_request = 1;
288 SDL_CondSignal(q->cond);
290 SDL_UnlockMutex(q->mutex);
293 /* return < 0 if aborted, 0 if no packet and > 0 if packet. */
294 static int packet_queue_get(PacketQueue *q, AVPacket *pkt, int block)
299 SDL_LockMutex(q->mutex);
302 if (q->abort_request) {
309 q->first_pkt = pkt1->next;
313 q->size -= pkt1->pkt.size;
322 SDL_CondWait(q->cond, q->mutex);
325 SDL_UnlockMutex(q->mutex);
329 static inline void fill_rectangle(SDL_Surface *screen,
330 int x, int y, int w, int h, int color)
337 SDL_FillRect(screen, &rect, color);
341 /* draw only the border of a rectangle */
342 void fill_border(VideoState *s, int x, int y, int w, int h, int color)
346 /* fill the background */
350 w2 = s->width - (x + w);
356 h2 = s->height - (y + h);
359 fill_rectangle(screen,
363 fill_rectangle(screen,
364 s->xleft + s->width - w2, s->ytop,
367 fill_rectangle(screen,
368 s->xleft + w1, s->ytop,
369 s->width - w1 - w2, h1,
371 fill_rectangle(screen,
372 s->xleft + w1, s->ytop + s->height - h2,
373 s->width - w1 - w2, h2,
381 #define ONE_HALF (1 << (SCALEBITS - 1))
382 #define FIX(x) ((int) ((x) * (1<<SCALEBITS) + 0.5))
384 #define RGB_TO_Y_CCIR(r, g, b) \
385 ((FIX(0.29900*219.0/255.0) * (r) + FIX(0.58700*219.0/255.0) * (g) + \
386 FIX(0.11400*219.0/255.0) * (b) + (ONE_HALF + (16 << SCALEBITS))) >> SCALEBITS)
388 #define RGB_TO_U_CCIR(r1, g1, b1, shift)\
389 (((- FIX(0.16874*224.0/255.0) * r1 - FIX(0.33126*224.0/255.0) * g1 + \
390 FIX(0.50000*224.0/255.0) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)
392 #define RGB_TO_V_CCIR(r1, g1, b1, shift)\
393 (((FIX(0.50000*224.0/255.0) * r1 - FIX(0.41869*224.0/255.0) * g1 - \
394 FIX(0.08131*224.0/255.0) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)
396 #define ALPHA_BLEND(a, oldp, newp, s)\
397 ((((oldp << s) * (255 - (a))) + (newp * (a))) / (255 << s))
399 #define RGBA_IN(r, g, b, a, s)\
401 unsigned int v = ((const uint32_t *)(s))[0];\
402 a = (v >> 24) & 0xff;\
403 r = (v >> 16) & 0xff;\
404 g = (v >> 8) & 0xff;\
408 #define YUVA_IN(y, u, v, a, s, pal)\
410 unsigned int val = ((const uint32_t *)(pal))[*(const uint8_t*)s];\
411 a = (val >> 24) & 0xff;\
412 y = (val >> 16) & 0xff;\
413 u = (val >> 8) & 0xff;\
417 #define YUVA_OUT(d, y, u, v, a)\
419 ((uint32_t *)(d))[0] = (a << 24) | (y << 16) | (u << 8) | v;\
425 static void blend_subrect(AVPicture *dst, const AVSubtitleRect *rect, int imgw, int imgh,
426 float scalex, float scaley)
428 int wrap, wrap3, width2, skip2;
429 int y, u, v, a, u1, v1, a1, w, h;
430 uint8_t *lum, *cb, *cr;
433 int dstx, dsty, dstw, dsth;
435 dstx = FFMIN(scalex * FFMAX(rect->x, 0), imgw);
436 dstw = FFMIN(FFMAX(rect->w, 0), imgw - dstx);
437 dsty = FFMIN(scaley * FFMAX(rect->y, 0), imgh);
438 dsth = FFMIN(FFMAX(rect->h, 0), imgh - dsty);
439 lum = dst->data[0] + dsty * dst->linesize[0];
440 cb = dst->data[1] + (dsty >> 1) * dst->linesize[1];
441 cr = dst->data[2] + (dsty >> 1) * dst->linesize[2];
443 width2 = (dstw + 1) >> 1;
445 wrap = dst->linesize[0];
446 wrap3 = rect->linesize;
448 pal = rect->rgba_palette; /* Now in YCrCb! */
456 YUVA_IN(y, u, v, a, p, pal);
457 lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
458 cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
459 cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
465 for(w = dstw - (dstx & 1); w >= 2; w -= 2) {
466 YUVA_IN(y, u, v, a, p, pal);
470 lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
472 YUVA_IN(y, u, v, a, p + BPP, pal);
476 lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
477 cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
478 cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
485 YUVA_IN(y, u, v, a, p, pal);
486 lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
487 cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
488 cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
490 p += wrap3 + (wrap3 - dstw * BPP);
491 lum += wrap + (wrap - dstw - dstx);
492 cb += dst->linesize[1] - width2 - skip2;
493 cr += dst->linesize[2] - width2 - skip2;
495 for(h = dsth - (dsty & 1); h >= 2; h -= 2) {
501 YUVA_IN(y, u, v, a, p, pal);
505 lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
508 YUVA_IN(y, u, v, a, p, pal);
512 lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
513 cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
514 cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
520 for(w = dstw - (dstx & 1); w >= 2; w -= 2) {
521 YUVA_IN(y, u, v, a, p, pal);
525 lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
527 YUVA_IN(y, u, v, a, p, pal);
531 lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
535 YUVA_IN(y, u, v, a, p, pal);
539 lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
541 YUVA_IN(y, u, v, a, p, pal);
545 lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
547 cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 2);
548 cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 2);
552 p += -wrap3 + 2 * BPP;
556 YUVA_IN(y, u, v, a, p, pal);
560 lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
563 YUVA_IN(y, u, v, a, p, pal);
567 lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
568 cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u1, 1);
569 cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v1, 1);
575 p += wrap3 + (wrap3 - dstw * BPP);
576 lum += wrap + (wrap - dstw - dstx);
577 cb += dst->linesize[1] - width2 - skip2;
578 cr += dst->linesize[2] - width2 - skip2;
580 /* handle odd height */
587 YUVA_IN(y, u, v, a, p, pal);
588 lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
589 cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
590 cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
596 for(w = dstw - (dstx & 1); w >= 2; w -= 2) {
597 YUVA_IN(y, u, v, a, p, pal);
601 lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
603 YUVA_IN(y, u, v, a, p + BPP, pal);
607 lum[1] = ALPHA_BLEND(a, lum[1], y, 0);
608 cb[0] = ALPHA_BLEND(a1 >> 2, cb[0], u, 1);
609 cr[0] = ALPHA_BLEND(a1 >> 2, cr[0], v, 1);
616 YUVA_IN(y, u, v, a, p, pal);
617 lum[0] = ALPHA_BLEND(a, lum[0], y, 0);
618 cb[0] = ALPHA_BLEND(a >> 2, cb[0], u, 0);
619 cr[0] = ALPHA_BLEND(a >> 2, cr[0], v, 0);
624 static void free_subpicture(SubPicture *sp)
628 for (i = 0; i < sp->sub.num_rects; i++)
630 av_free(sp->sub.rects[i].bitmap);
631 av_free(sp->sub.rects[i].rgba_palette);
634 av_free(sp->sub.rects);
636 memset(&sp->sub, 0, sizeof(AVSubtitle));
639 static void video_image_display(VideoState *is)
645 int width, height, x, y;
649 vp = &is->pictq[is->pictq_rindex];
651 /* XXX: use variable in the frame */
652 if (is->video_st->codec->sample_aspect_ratio.num == 0)
655 aspect_ratio = av_q2d(is->video_st->codec->sample_aspect_ratio)
656 * is->video_st->codec->width / is->video_st->codec->height;;
657 if (aspect_ratio <= 0.0)
658 aspect_ratio = (float)is->video_st->codec->width /
659 (float)is->video_st->codec->height;
660 /* if an active format is indicated, then it overrides the
663 if (is->video_st->codec->dtg_active_format != is->dtg_active_format) {
664 is->dtg_active_format = is->video_st->codec->dtg_active_format;
665 printf("dtg_active_format=%d\n", is->dtg_active_format);
669 switch(is->video_st->codec->dtg_active_format) {
670 case FF_DTG_AFD_SAME:
675 aspect_ratio = 4.0 / 3.0;
677 case FF_DTG_AFD_16_9:
678 aspect_ratio = 16.0 / 9.0;
680 case FF_DTG_AFD_14_9:
681 aspect_ratio = 14.0 / 9.0;
683 case FF_DTG_AFD_4_3_SP_14_9:
684 aspect_ratio = 14.0 / 9.0;
686 case FF_DTG_AFD_16_9_SP_14_9:
687 aspect_ratio = 14.0 / 9.0;
689 case FF_DTG_AFD_SP_4_3:
690 aspect_ratio = 4.0 / 3.0;
697 if (is->subpq_size > 0)
699 sp = &is->subpq[is->subpq_rindex];
701 if (vp->pts >= sp->pts + ((float) sp->sub.start_display_time / 1000))
703 float scalex = 1, scaley = 1;
704 SDL_LockYUVOverlay (vp->bmp);
706 pict.data[0] = vp->bmp->pixels[0];
707 pict.data[1] = vp->bmp->pixels[2];
708 pict.data[2] = vp->bmp->pixels[1];
710 pict.linesize[0] = vp->bmp->pitches[0];
711 pict.linesize[1] = vp->bmp->pitches[2];
712 pict.linesize[2] = vp->bmp->pitches[1];
714 if (is->subtitle_st->codec->width)
715 scalex = (float)vp->bmp->w / is->subtitle_st->codec->width;
716 if (is->subtitle_st->codec->height)
717 scaley = (float)vp->bmp->h / is->subtitle_st->codec->height;
718 for (i = 0; i < sp->sub.num_rects; i++)
719 blend_subrect(&pict, &sp->sub.rects[i],
720 vp->bmp->w, vp->bmp->h,
723 SDL_UnlockYUVOverlay (vp->bmp);
729 /* XXX: we suppose the screen has a 1.0 pixel ratio */
731 width = ((int)rint(height * aspect_ratio)) & -3;
732 if (width > is->width) {
734 height = ((int)rint(width / aspect_ratio)) & -3;
736 x = (is->width - width) / 2;
737 y = (is->height - height) / 2;
738 if (!is->no_background) {
739 /* fill the background */
740 // fill_border(is, x, y, width, height, QERGB(0x00, 0x00, 0x00));
742 is->no_background = 0;
744 rect.x = is->xleft + x;
745 rect.y = is->ytop + y;
748 SDL_DisplayYUVOverlay(vp->bmp, &rect);
751 fill_rectangle(screen,
752 is->xleft, is->ytop, is->width, is->height,
753 QERGB(0x00, 0x00, 0x00));
758 static inline int compute_mod(int a, int b)
767 static void video_audio_display(VideoState *s)
769 int i, i_start, x, y1, y, ys, delay, n, nb_display_channels;
770 int ch, channels, h, h2, bgcolor, fgcolor;
773 /* compute display index : center on currently output samples */
774 channels = s->audio_st->codec->channels;
775 nb_display_channels = channels;
778 delay = audio_write_get_buf_size(s);
781 /* to be more precise, we take into account the time spent since
782 the last buffer computation */
783 if (audio_callback_time) {
784 time_diff = av_gettime() - audio_callback_time;
785 delay += (time_diff * s->audio_st->codec->sample_rate) / 1000000;
788 delay -= s->width / 2;
789 if (delay < s->width)
792 i_start= x = compute_mod(s->sample_array_index - delay * channels, SAMPLE_ARRAY_SIZE);
795 for(i=0; i<1000; i+=channels){
796 int idx= (SAMPLE_ARRAY_SIZE + x - i) % SAMPLE_ARRAY_SIZE;
797 int a= s->sample_array[idx];
798 int b= s->sample_array[(idx + 4*channels)%SAMPLE_ARRAY_SIZE];
799 int c= s->sample_array[(idx + 5*channels)%SAMPLE_ARRAY_SIZE];
800 int d= s->sample_array[(idx + 9*channels)%SAMPLE_ARRAY_SIZE];
802 if(h<score && (b^c)<0){
808 s->last_i_start = i_start;
810 i_start = s->last_i_start;
813 bgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0x00);
814 fill_rectangle(screen,
815 s->xleft, s->ytop, s->width, s->height,
818 fgcolor = SDL_MapRGB(screen->format, 0xff, 0xff, 0xff);
820 /* total height for one channel */
821 h = s->height / nb_display_channels;
822 /* graph height / 2 */
824 for(ch = 0;ch < nb_display_channels; ch++) {
826 y1 = s->ytop + ch * h + (h / 2); /* position of center line */
827 for(x = 0; x < s->width; x++) {
828 y = (s->sample_array[i] * h2) >> 15;
835 fill_rectangle(screen,
836 s->xleft + x, ys, 1, y,
839 if (i >= SAMPLE_ARRAY_SIZE)
840 i -= SAMPLE_ARRAY_SIZE;
844 fgcolor = SDL_MapRGB(screen->format, 0x00, 0x00, 0xff);
846 for(ch = 1;ch < nb_display_channels; ch++) {
847 y = s->ytop + ch * h;
848 fill_rectangle(screen,
849 s->xleft, y, s->width, 1,
852 SDL_UpdateRect(screen, s->xleft, s->ytop, s->width, s->height);
855 static int video_open(VideoState *is){
856 int flags = SDL_HWSURFACE|SDL_ASYNCBLIT|SDL_HWACCEL;
859 if(is_full_screen) flags |= SDL_FULLSCREEN;
860 else flags |= SDL_RESIZABLE;
862 if (is_full_screen && fs_screen_width) {
864 h = fs_screen_height;
865 } else if(!is_full_screen && screen_width){
868 }else if (is->video_st && is->video_st->codec->width){
869 w = is->video_st->codec->width;
870 h = is->video_st->codec->height;
875 #ifndef CONFIG_DARWIN
876 screen = SDL_SetVideoMode(w, h, 0, flags);
878 /* setting bits_per_pixel = 0 or 32 causes blank video on OS X */
879 screen = SDL_SetVideoMode(w, h, 24, flags);
882 fprintf(stderr, "SDL: could not set video mode - exiting\n");
885 SDL_WM_SetCaption("FFplay", "FFplay");
887 is->width = screen->w;
888 is->height = screen->h;
893 /* display the current picture, if any */
894 static void video_display(VideoState *is)
897 video_open(cur_stream);
898 if (is->audio_st && is->show_audio)
899 video_audio_display(is);
900 else if (is->video_st)
901 video_image_display(is);
904 static Uint32 sdl_refresh_timer_cb(Uint32 interval, void *opaque)
907 event.type = FF_REFRESH_EVENT;
908 event.user.data1 = opaque;
909 SDL_PushEvent(&event);
910 return 0; /* 0 means stop timer */
913 /* schedule a video refresh in 'delay' ms */
914 static void schedule_refresh(VideoState *is, int delay)
916 SDL_AddTimer(delay, sdl_refresh_timer_cb, is);
919 /* get the current audio clock value */
920 static double get_audio_clock(VideoState *is)
923 int hw_buf_size, bytes_per_sec;
924 pts = is->audio_clock;
925 hw_buf_size = audio_write_get_buf_size(is);
928 bytes_per_sec = is->audio_st->codec->sample_rate *
929 2 * is->audio_st->codec->channels;
932 pts -= (double)hw_buf_size / bytes_per_sec;
936 /* get the current video clock value */
937 static double get_video_clock(VideoState *is)
943 delta = (av_gettime() - is->video_current_pts_time) / 1000000.0;
945 return is->video_current_pts + delta;
948 /* get the current external clock value */
949 static double get_external_clock(VideoState *is)
953 return is->external_clock + ((ti - is->external_clock_time) * 1e-6);
956 /* get the current master clock value */
957 static double get_master_clock(VideoState *is)
961 if (is->av_sync_type == AV_SYNC_VIDEO_MASTER) {
963 val = get_video_clock(is);
965 val = get_audio_clock(is);
966 } else if (is->av_sync_type == AV_SYNC_AUDIO_MASTER) {
968 val = get_audio_clock(is);
970 val = get_video_clock(is);
972 val = get_external_clock(is);
977 /* seek in the stream */
978 static void stream_seek(VideoState *is, int64_t pos, int rel)
982 is->seek_flags = rel < 0 ? AVSEEK_FLAG_BACKWARD : 0;
984 is->seek_flags |= AVSEEK_FLAG_BYTE;
989 /* pause or resume the video */
990 static void stream_pause(VideoState *is)
992 is->paused = !is->paused;
994 is->video_current_pts = get_video_clock(is);
995 is->frame_timer += (av_gettime() - is->video_current_pts_time) / 1000000.0;
999 /* called to display each frame */
1000 static void video_refresh_timer(void *opaque)
1002 VideoState *is = opaque;
1004 double actual_delay, delay, sync_threshold, ref_clock, diff;
1006 SubPicture *sp, *sp2;
1009 if (is->pictq_size == 0) {
1010 /* if no picture, need to wait */
1011 schedule_refresh(is, 1);
1013 /* dequeue the picture */
1014 vp = &is->pictq[is->pictq_rindex];
1016 /* update current video pts */
1017 is->video_current_pts = vp->pts;
1018 is->video_current_pts_time = av_gettime();
1020 /* compute nominal delay */
1021 delay = vp->pts - is->frame_last_pts;
1022 if (delay <= 0 || delay >= 1.0) {
1023 /* if incorrect delay, use previous one */
1024 delay = is->frame_last_delay;
1026 is->frame_last_delay = delay;
1027 is->frame_last_pts = vp->pts;
1029 /* update delay to follow master synchronisation source */
1030 if (((is->av_sync_type == AV_SYNC_AUDIO_MASTER && is->audio_st) ||
1031 is->av_sync_type == AV_SYNC_EXTERNAL_CLOCK)) {
1032 /* if video is slave, we try to correct big delays by
1033 duplicating or deleting a frame */
1034 ref_clock = get_master_clock(is);
1035 diff = vp->pts - ref_clock;
1037 /* skip or repeat frame. We take into account the
1038 delay to compute the threshold. I still don't know
1039 if it is the best guess */
1040 sync_threshold = AV_SYNC_THRESHOLD;
1041 if (delay > sync_threshold)
1042 sync_threshold = delay;
1043 if (fabs(diff) < AV_NOSYNC_THRESHOLD) {
1044 if (diff <= -sync_threshold)
1046 else if (diff >= sync_threshold)
1051 is->frame_timer += delay;
1052 /* compute the REAL delay (we need to do that to avoid
1054 actual_delay = is->frame_timer - (av_gettime() / 1000000.0);
1055 if (actual_delay < 0.010) {
1056 /* XXX: should skip picture */
1057 actual_delay = 0.010;
1059 /* launch timer for next picture */
1060 schedule_refresh(is, (int)(actual_delay * 1000 + 0.5));
1062 #if defined(DEBUG_SYNC)
1063 printf("video: delay=%0.3f actual_delay=%0.3f pts=%0.3f A-V=%f\n",
1064 delay, actual_delay, vp->pts, -diff);
1067 if(is->subtitle_st) {
1068 if (is->subtitle_stream_changed) {
1069 SDL_LockMutex(is->subpq_mutex);
1071 while (is->subpq_size) {
1072 free_subpicture(&is->subpq[is->subpq_rindex]);
1074 /* update queue size and signal for next picture */
1075 if (++is->subpq_rindex == SUBPICTURE_QUEUE_SIZE)
1076 is->subpq_rindex = 0;
1080 is->subtitle_stream_changed = 0;
1082 SDL_CondSignal(is->subpq_cond);
1083 SDL_UnlockMutex(is->subpq_mutex);
1085 if (is->subpq_size > 0) {
1086 sp = &is->subpq[is->subpq_rindex];
1088 if (is->subpq_size > 1)
1089 sp2 = &is->subpq[(is->subpq_rindex + 1) % SUBPICTURE_QUEUE_SIZE];
1093 if ((is->video_current_pts > (sp->pts + ((float) sp->sub.end_display_time / 1000)))
1094 || (sp2 && is->video_current_pts > (sp2->pts + ((float) sp2->sub.start_display_time / 1000))))
1096 free_subpicture(sp);
1098 /* update queue size and signal for next picture */
1099 if (++is->subpq_rindex == SUBPICTURE_QUEUE_SIZE)
1100 is->subpq_rindex = 0;
1102 SDL_LockMutex(is->subpq_mutex);
1104 SDL_CondSignal(is->subpq_cond);
1105 SDL_UnlockMutex(is->subpq_mutex);
1111 /* display picture */
1114 /* update queue size and signal for next picture */
1115 if (++is->pictq_rindex == VIDEO_PICTURE_QUEUE_SIZE)
1116 is->pictq_rindex = 0;
1118 SDL_LockMutex(is->pictq_mutex);
1120 SDL_CondSignal(is->pictq_cond);
1121 SDL_UnlockMutex(is->pictq_mutex);
1123 } else if (is->audio_st) {
1124 /* draw the next audio frame */
1126 schedule_refresh(is, 40);
1128 /* if only audio stream, then display the audio bars (better
1129 than nothing, just to test the implementation */
1131 /* display picture */
1134 schedule_refresh(is, 100);
1137 static int64_t last_time;
1139 int aqsize, vqsize, sqsize;
1142 cur_time = av_gettime();
1143 if (!last_time || (cur_time - last_time) >= 500 * 1000) {
1148 aqsize = is->audioq.size;
1150 vqsize = is->videoq.size;
1151 if (is->subtitle_st)
1152 sqsize = is->subtitleq.size;
1154 if (is->audio_st && is->video_st)
1155 av_diff = get_audio_clock(is) - get_video_clock(is);
1156 printf("%7.2f A-V:%7.3f aq=%5dKB vq=%5dKB sq=%5dB \r",
1157 get_master_clock(is), av_diff, aqsize / 1024, vqsize / 1024, sqsize);
1159 last_time = cur_time;
1164 /* allocate a picture (needs to do that in main thread to avoid
1165 potential locking problems */
1166 static void alloc_picture(void *opaque)
1168 VideoState *is = opaque;
1171 vp = &is->pictq[is->pictq_windex];
1174 SDL_FreeYUVOverlay(vp->bmp);
1177 /* XXX: use generic function */
1178 /* XXX: disable overlay if no hardware acceleration or if RGB format */
1179 switch(is->video_st->codec->pix_fmt) {
1180 case PIX_FMT_YUV420P:
1181 case PIX_FMT_YUV422P:
1182 case PIX_FMT_YUV444P:
1183 case PIX_FMT_YUYV422:
1184 case PIX_FMT_YUV410P:
1185 case PIX_FMT_YUV411P:
1193 vp->bmp = SDL_CreateYUVOverlay(is->video_st->codec->width,
1194 is->video_st->codec->height,
1197 vp->width = is->video_st->codec->width;
1198 vp->height = is->video_st->codec->height;
1200 SDL_LockMutex(is->pictq_mutex);
1202 SDL_CondSignal(is->pictq_cond);
1203 SDL_UnlockMutex(is->pictq_mutex);
1208 * @param pts the dts of the pkt / pts of the frame and guessed if not known
1210 static int queue_picture(VideoState *is, AVFrame *src_frame, double pts)
1215 static struct SwsContext *img_convert_ctx;
1217 /* wait until we have space to put a new picture */
1218 SDL_LockMutex(is->pictq_mutex);
1219 while (is->pictq_size >= VIDEO_PICTURE_QUEUE_SIZE &&
1220 !is->videoq.abort_request) {
1221 SDL_CondWait(is->pictq_cond, is->pictq_mutex);
1223 SDL_UnlockMutex(is->pictq_mutex);
1225 if (is->videoq.abort_request)
1228 vp = &is->pictq[is->pictq_windex];
1230 /* alloc or resize hardware picture buffer */
1232 vp->width != is->video_st->codec->width ||
1233 vp->height != is->video_st->codec->height) {
1238 /* the allocation must be done in the main thread to avoid
1240 event.type = FF_ALLOC_EVENT;
1241 event.user.data1 = is;
1242 SDL_PushEvent(&event);
1244 /* wait until the picture is allocated */
1245 SDL_LockMutex(is->pictq_mutex);
1246 while (!vp->allocated && !is->videoq.abort_request) {
1247 SDL_CondWait(is->pictq_cond, is->pictq_mutex);
1249 SDL_UnlockMutex(is->pictq_mutex);
1251 if (is->videoq.abort_request)
1255 /* if the frame is not skipped, then display it */
1257 /* get a pointer on the bitmap */
1258 SDL_LockYUVOverlay (vp->bmp);
1260 dst_pix_fmt = PIX_FMT_YUV420P;
1261 pict.data[0] = vp->bmp->pixels[0];
1262 pict.data[1] = vp->bmp->pixels[2];
1263 pict.data[2] = vp->bmp->pixels[1];
1265 pict.linesize[0] = vp->bmp->pitches[0];
1266 pict.linesize[1] = vp->bmp->pitches[2];
1267 pict.linesize[2] = vp->bmp->pitches[1];
1268 img_convert_ctx = sws_getCachedContext(img_convert_ctx,
1269 is->video_st->codec->width, is->video_st->codec->height,
1270 is->video_st->codec->pix_fmt,
1271 is->video_st->codec->width, is->video_st->codec->height,
1272 dst_pix_fmt, sws_flags, NULL, NULL, NULL);
1273 if (img_convert_ctx == NULL) {
1274 fprintf(stderr, "Cannot initialize the conversion context\n");
1277 sws_scale(img_convert_ctx, src_frame->data, src_frame->linesize,
1278 0, is->video_st->codec->height, pict.data, pict.linesize);
1279 /* update the bitmap content */
1280 SDL_UnlockYUVOverlay(vp->bmp);
1284 /* now we can update the picture count */
1285 if (++is->pictq_windex == VIDEO_PICTURE_QUEUE_SIZE)
1286 is->pictq_windex = 0;
1287 SDL_LockMutex(is->pictq_mutex);
1289 SDL_UnlockMutex(is->pictq_mutex);
1295 * compute the exact PTS for the picture if it is omitted in the stream
1296 * @param pts1 the dts of the pkt / pts of the frame
1298 static int output_picture2(VideoState *is, AVFrame *src_frame, double pts1)
1300 double frame_delay, pts;
1305 /* update video clock with pts, if present */
1306 is->video_clock = pts;
1308 pts = is->video_clock;
1310 /* update video clock for next frame */
1311 frame_delay = av_q2d(is->video_st->codec->time_base);
1312 /* for MPEG2, the frame can be repeated, so we update the
1313 clock accordingly */
1314 frame_delay += src_frame->repeat_pict * (frame_delay * 0.5);
1315 is->video_clock += frame_delay;
1317 #if defined(DEBUG_SYNC) && 0
1320 if (src_frame->pict_type == FF_B_TYPE)
1322 else if (src_frame->pict_type == FF_I_TYPE)
1326 printf("frame_type=%c clock=%0.3f pts=%0.3f\n",
1330 return queue_picture(is, src_frame, pts);
1333 static uint64_t global_video_pkt_pts= AV_NOPTS_VALUE;
1335 static int my_get_buffer(struct AVCodecContext *c, AVFrame *pic){
1336 int ret= avcodec_default_get_buffer(c, pic);
1337 uint64_t *pts= av_malloc(sizeof(uint64_t));
1338 *pts= global_video_pkt_pts;
1343 static void my_release_buffer(struct AVCodecContext *c, AVFrame *pic){
1344 if(pic) av_freep(&pic->opaque);
1345 avcodec_default_release_buffer(c, pic);
1348 static int video_thread(void *arg)
1350 VideoState *is = arg;
1351 AVPacket pkt1, *pkt = &pkt1;
1352 int len1, got_picture;
1353 AVFrame *frame= avcodec_alloc_frame();
1357 while (is->paused && !is->videoq.abort_request) {
1360 if (packet_queue_get(&is->videoq, pkt, 1) < 0)
1363 if(pkt->data == flush_pkt.data){
1364 avcodec_flush_buffers(is->video_st->codec);
1368 /* NOTE: ipts is the PTS of the _first_ picture beginning in
1369 this packet, if any */
1370 global_video_pkt_pts= pkt->pts;
1371 len1 = avcodec_decode_video(is->video_st->codec,
1372 frame, &got_picture,
1373 pkt->data, pkt->size);
1375 if( (decoder_reorder_pts || pkt->dts == AV_NOPTS_VALUE)
1376 && frame->opaque && *(uint64_t*)frame->opaque != AV_NOPTS_VALUE)
1377 pts= *(uint64_t*)frame->opaque;
1378 else if(pkt->dts != AV_NOPTS_VALUE)
1382 pts *= av_q2d(is->video_st->time_base);
1387 if (output_picture2(is, frame, pts) < 0)
1390 av_free_packet(pkt);
1393 stream_pause(cur_stream);
1400 static int subtitle_thread(void *arg)
1402 VideoState *is = arg;
1404 AVPacket pkt1, *pkt = &pkt1;
1405 int len1, got_subtitle;
1408 int r, g, b, y, u, v, a;
1411 while (is->paused && !is->subtitleq.abort_request) {
1414 if (packet_queue_get(&is->subtitleq, pkt, 1) < 0)
1417 if(pkt->data == flush_pkt.data){
1418 avcodec_flush_buffers(is->subtitle_st->codec);
1421 SDL_LockMutex(is->subpq_mutex);
1422 while (is->subpq_size >= SUBPICTURE_QUEUE_SIZE &&
1423 !is->subtitleq.abort_request) {
1424 SDL_CondWait(is->subpq_cond, is->subpq_mutex);
1426 SDL_UnlockMutex(is->subpq_mutex);
1428 if (is->subtitleq.abort_request)
1431 sp = &is->subpq[is->subpq_windex];
1433 /* NOTE: ipts is the PTS of the _first_ picture beginning in
1434 this packet, if any */
1436 if (pkt->pts != AV_NOPTS_VALUE)
1437 pts = av_q2d(is->subtitle_st->time_base)*pkt->pts;
1439 len1 = avcodec_decode_subtitle(is->subtitle_st->codec,
1440 &sp->sub, &got_subtitle,
1441 pkt->data, pkt->size);
1444 if (got_subtitle && sp->sub.format == 0) {
1447 for (i = 0; i < sp->sub.num_rects; i++)
1449 for (j = 0; j < sp->sub.rects[i].nb_colors; j++)
1451 RGBA_IN(r, g, b, a, sp->sub.rects[i].rgba_palette + j);
1452 y = RGB_TO_Y_CCIR(r, g, b);
1453 u = RGB_TO_U_CCIR(r, g, b, 0);
1454 v = RGB_TO_V_CCIR(r, g, b, 0);
1455 YUVA_OUT(sp->sub.rects[i].rgba_palette + j, y, u, v, a);
1459 /* now we can update the picture count */
1460 if (++is->subpq_windex == SUBPICTURE_QUEUE_SIZE)
1461 is->subpq_windex = 0;
1462 SDL_LockMutex(is->subpq_mutex);
1464 SDL_UnlockMutex(is->subpq_mutex);
1466 av_free_packet(pkt);
1469 // stream_pause(cur_stream);
1475 /* copy samples for viewing in editor window */
1476 static void update_sample_display(VideoState *is, short *samples, int samples_size)
1478 int size, len, channels;
1480 channels = is->audio_st->codec->channels;
1482 size = samples_size / sizeof(short);
1484 len = SAMPLE_ARRAY_SIZE - is->sample_array_index;
1487 memcpy(is->sample_array + is->sample_array_index, samples, len * sizeof(short));
1489 is->sample_array_index += len;
1490 if (is->sample_array_index >= SAMPLE_ARRAY_SIZE)
1491 is->sample_array_index = 0;
1496 /* return the new audio buffer size (samples can be added or deleted
1497 to get better sync if video or external master clock) */
1498 static int synchronize_audio(VideoState *is, short *samples,
1499 int samples_size1, double pts)
1501 int n, samples_size;
1504 n = 2 * is->audio_st->codec->channels;
1505 samples_size = samples_size1;
1507 /* if not master, then we try to remove or add samples to correct the clock */
1508 if (((is->av_sync_type == AV_SYNC_VIDEO_MASTER && is->video_st) ||
1509 is->av_sync_type == AV_SYNC_EXTERNAL_CLOCK)) {
1510 double diff, avg_diff;
1511 int wanted_size, min_size, max_size, nb_samples;
1513 ref_clock = get_master_clock(is);
1514 diff = get_audio_clock(is) - ref_clock;
1516 if (diff < AV_NOSYNC_THRESHOLD) {
1517 is->audio_diff_cum = diff + is->audio_diff_avg_coef * is->audio_diff_cum;
1518 if (is->audio_diff_avg_count < AUDIO_DIFF_AVG_NB) {
1519 /* not enough measures to have a correct estimate */
1520 is->audio_diff_avg_count++;
1522 /* estimate the A-V difference */
1523 avg_diff = is->audio_diff_cum * (1.0 - is->audio_diff_avg_coef);
1525 if (fabs(avg_diff) >= is->audio_diff_threshold) {
1526 wanted_size = samples_size + ((int)(diff * is->audio_st->codec->sample_rate) * n);
1527 nb_samples = samples_size / n;
1529 min_size = ((nb_samples * (100 - SAMPLE_CORRECTION_PERCENT_MAX)) / 100) * n;
1530 max_size = ((nb_samples * (100 + SAMPLE_CORRECTION_PERCENT_MAX)) / 100) * n;
1531 if (wanted_size < min_size)
1532 wanted_size = min_size;
1533 else if (wanted_size > max_size)
1534 wanted_size = max_size;
1536 /* add or remove samples to correction the synchro */
1537 if (wanted_size < samples_size) {
1538 /* remove samples */
1539 samples_size = wanted_size;
1540 } else if (wanted_size > samples_size) {
1541 uint8_t *samples_end, *q;
1545 nb = (samples_size - wanted_size);
1546 samples_end = (uint8_t *)samples + samples_size - n;
1547 q = samples_end + n;
1549 memcpy(q, samples_end, n);
1553 samples_size = wanted_size;
1557 printf("diff=%f adiff=%f sample_diff=%d apts=%0.3f vpts=%0.3f %f\n",
1558 diff, avg_diff, samples_size - samples_size1,
1559 is->audio_clock, is->video_clock, is->audio_diff_threshold);
1563 /* too big difference : may be initial PTS errors, so
1565 is->audio_diff_avg_count = 0;
1566 is->audio_diff_cum = 0;
1570 return samples_size;
1573 /* decode one audio frame and returns its uncompressed size */
1574 static int audio_decode_frame(VideoState *is, uint8_t *audio_buf, int buf_size, double *pts_ptr)
1576 AVPacket *pkt = &is->audio_pkt;
1577 int n, len1, data_size;
1581 /* NOTE: the audio packet can contain several frames */
1582 while (is->audio_pkt_size > 0) {
1583 data_size = buf_size;
1584 len1 = avcodec_decode_audio2(is->audio_st->codec,
1585 (int16_t *)audio_buf, &data_size,
1586 is->audio_pkt_data, is->audio_pkt_size);
1588 /* if error, we skip the frame */
1589 is->audio_pkt_size = 0;
1593 is->audio_pkt_data += len1;
1594 is->audio_pkt_size -= len1;
1597 /* if no pts, then compute it */
1598 pts = is->audio_clock;
1600 n = 2 * is->audio_st->codec->channels;
1601 is->audio_clock += (double)data_size /
1602 (double)(n * is->audio_st->codec->sample_rate);
1603 #if defined(DEBUG_SYNC)
1605 static double last_clock;
1606 printf("audio: delay=%0.3f clock=%0.3f pts=%0.3f\n",
1607 is->audio_clock - last_clock,
1608 is->audio_clock, pts);
1609 last_clock = is->audio_clock;
1615 /* free the current packet */
1617 av_free_packet(pkt);
1619 if (is->paused || is->audioq.abort_request) {
1623 /* read next packet */
1624 if (packet_queue_get(&is->audioq, pkt, 1) < 0)
1626 if(pkt->data == flush_pkt.data){
1627 avcodec_flush_buffers(is->audio_st->codec);
1631 is->audio_pkt_data = pkt->data;
1632 is->audio_pkt_size = pkt->size;
1634 /* if update the audio clock with the pts */
1635 if (pkt->pts != AV_NOPTS_VALUE) {
1636 is->audio_clock = av_q2d(is->audio_st->time_base)*pkt->pts;
1641 /* get the current audio output buffer size, in samples. With SDL, we
1642 cannot have a precise information */
1643 static int audio_write_get_buf_size(VideoState *is)
1645 return is->audio_buf_size - is->audio_buf_index;
1649 /* prepare a new audio buffer */
1650 void sdl_audio_callback(void *opaque, Uint8 *stream, int len)
1652 VideoState *is = opaque;
1653 int audio_size, len1;
1656 audio_callback_time = av_gettime();
1659 if (is->audio_buf_index >= is->audio_buf_size) {
1660 audio_size = audio_decode_frame(is, is->audio_buf, sizeof(is->audio_buf), &pts);
1661 if (audio_size < 0) {
1662 /* if error, just output silence */
1663 is->audio_buf_size = 1024;
1664 memset(is->audio_buf, 0, is->audio_buf_size);
1667 update_sample_display(is, (int16_t *)is->audio_buf, audio_size);
1668 audio_size = synchronize_audio(is, (int16_t *)is->audio_buf, audio_size,
1670 is->audio_buf_size = audio_size;
1672 is->audio_buf_index = 0;
1674 len1 = is->audio_buf_size - is->audio_buf_index;
1677 memcpy(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, len1);
1680 is->audio_buf_index += len1;
1684 /* open a given stream. Return 0 if OK */
1685 static int stream_component_open(VideoState *is, int stream_index)
1687 AVFormatContext *ic = is->ic;
1688 AVCodecContext *enc;
1690 SDL_AudioSpec wanted_spec, spec;
1692 if (stream_index < 0 || stream_index >= ic->nb_streams)
1694 enc = ic->streams[stream_index]->codec;
1696 /* prepare audio output */
1697 if (enc->codec_type == CODEC_TYPE_AUDIO) {
1698 wanted_spec.freq = enc->sample_rate;
1699 wanted_spec.format = AUDIO_S16SYS;
1700 /* hack for AC3. XXX: suppress that */
1701 if (enc->channels > 2)
1703 wanted_spec.channels = enc->channels;
1704 wanted_spec.silence = 0;
1705 wanted_spec.samples = SDL_AUDIO_BUFFER_SIZE;
1706 wanted_spec.callback = sdl_audio_callback;
1707 wanted_spec.userdata = is;
1708 if (SDL_OpenAudio(&wanted_spec, &spec) < 0) {
1709 fprintf(stderr, "SDL_OpenAudio: %s\n", SDL_GetError());
1712 is->audio_hw_buf_size = spec.size;
1715 codec = avcodec_find_decoder(enc->codec_id);
1716 enc->debug_mv = debug_mv;
1718 enc->workaround_bugs = workaround_bugs;
1719 enc->lowres = lowres;
1720 if(lowres) enc->flags |= CODEC_FLAG_EMU_EDGE;
1721 enc->idct_algo= idct;
1722 if(fast) enc->flags2 |= CODEC_FLAG2_FAST;
1723 enc->skip_frame= skip_frame;
1724 enc->skip_idct= skip_idct;
1725 enc->skip_loop_filter= skip_loop_filter;
1726 enc->error_resilience= error_resilience;
1727 enc->error_concealment= error_concealment;
1729 avcodec_open(enc, codec) < 0)
1732 avcodec_thread_init(enc, thread_count);
1733 enc->thread_count= thread_count;
1734 switch(enc->codec_type) {
1735 case CODEC_TYPE_AUDIO:
1736 is->audio_stream = stream_index;
1737 is->audio_st = ic->streams[stream_index];
1738 is->audio_buf_size = 0;
1739 is->audio_buf_index = 0;
1741 /* init averaging filter */
1742 is->audio_diff_avg_coef = exp(log(0.01) / AUDIO_DIFF_AVG_NB);
1743 is->audio_diff_avg_count = 0;
1744 /* since we do not have a precise anough audio fifo fullness,
1745 we correct audio sync only if larger than this threshold */
1746 is->audio_diff_threshold = 2.0 * SDL_AUDIO_BUFFER_SIZE / enc->sample_rate;
1748 memset(&is->audio_pkt, 0, sizeof(is->audio_pkt));
1749 packet_queue_init(&is->audioq);
1752 case CODEC_TYPE_VIDEO:
1753 is->video_stream = stream_index;
1754 is->video_st = ic->streams[stream_index];
1756 is->frame_last_delay = 40e-3;
1757 is->frame_timer = (double)av_gettime() / 1000000.0;
1758 is->video_current_pts_time = av_gettime();
1760 packet_queue_init(&is->videoq);
1761 is->video_tid = SDL_CreateThread(video_thread, is);
1763 enc-> get_buffer= my_get_buffer;
1764 enc->release_buffer= my_release_buffer;
1766 case CODEC_TYPE_SUBTITLE:
1767 is->subtitle_stream = stream_index;
1768 is->subtitle_st = ic->streams[stream_index];
1769 packet_queue_init(&is->subtitleq);
1771 is->subtitle_tid = SDL_CreateThread(subtitle_thread, is);
1779 static void stream_component_close(VideoState *is, int stream_index)
1781 AVFormatContext *ic = is->ic;
1782 AVCodecContext *enc;
1784 if (stream_index < 0 || stream_index >= ic->nb_streams)
1786 enc = ic->streams[stream_index]->codec;
1788 switch(enc->codec_type) {
1789 case CODEC_TYPE_AUDIO:
1790 packet_queue_abort(&is->audioq);
1794 packet_queue_end(&is->audioq);
1796 case CODEC_TYPE_VIDEO:
1797 packet_queue_abort(&is->videoq);
1799 /* note: we also signal this mutex to make sure we deblock the
1800 video thread in all cases */
1801 SDL_LockMutex(is->pictq_mutex);
1802 SDL_CondSignal(is->pictq_cond);
1803 SDL_UnlockMutex(is->pictq_mutex);
1805 SDL_WaitThread(is->video_tid, NULL);
1807 packet_queue_end(&is->videoq);
1809 case CODEC_TYPE_SUBTITLE:
1810 packet_queue_abort(&is->subtitleq);
1812 /* note: we also signal this mutex to make sure we deblock the
1813 video thread in all cases */
1814 SDL_LockMutex(is->subpq_mutex);
1815 is->subtitle_stream_changed = 1;
1817 SDL_CondSignal(is->subpq_cond);
1818 SDL_UnlockMutex(is->subpq_mutex);
1820 SDL_WaitThread(is->subtitle_tid, NULL);
1822 packet_queue_end(&is->subtitleq);
1829 switch(enc->codec_type) {
1830 case CODEC_TYPE_AUDIO:
1831 is->audio_st = NULL;
1832 is->audio_stream = -1;
1834 case CODEC_TYPE_VIDEO:
1835 is->video_st = NULL;
1836 is->video_stream = -1;
1838 case CODEC_TYPE_SUBTITLE:
1839 is->subtitle_st = NULL;
1840 is->subtitle_stream = -1;
1847 static void dump_stream_info(const AVFormatContext *s)
1850 fprintf(stderr, "Track: %d\n", s->track);
1851 if (s->title[0] != '\0')
1852 fprintf(stderr, "Title: %s\n", s->title);
1853 if (s->author[0] != '\0')
1854 fprintf(stderr, "Author: %s\n", s->author);
1855 if (s->copyright[0] != '\0')
1856 fprintf(stderr, "Copyright: %s\n", s->copyright);
1857 if (s->comment[0] != '\0')
1858 fprintf(stderr, "Comment: %s\n", s->comment);
1859 if (s->album[0] != '\0')
1860 fprintf(stderr, "Album: %s\n", s->album);
1862 fprintf(stderr, "Year: %d\n", s->year);
1863 if (s->genre[0] != '\0')
1864 fprintf(stderr, "Genre: %s\n", s->genre);
1867 /* since we have only one decoding thread, we can use a global
1868 variable instead of a thread local variable */
1869 static VideoState *global_video_state;
1871 static int decode_interrupt_cb(void)
1873 return (global_video_state && global_video_state->abort_request);
1876 /* this thread gets the stream from the disk or the network */
1877 static int decode_thread(void *arg)
1879 VideoState *is = arg;
1880 AVFormatContext *ic;
1881 int err, i, ret, video_index, audio_index, use_play;
1882 AVPacket pkt1, *pkt = &pkt1;
1883 AVFormatParameters params, *ap = ¶ms;
1887 is->video_stream = -1;
1888 is->audio_stream = -1;
1889 is->subtitle_stream = -1;
1891 global_video_state = is;
1892 url_set_interrupt_cb(decode_interrupt_cb);
1894 memset(ap, 0, sizeof(*ap));
1895 ap->initial_pause = 1; /* we force a pause when starting an RTSP
1898 ap->width = frame_width;
1899 ap->height= frame_height;
1900 ap->time_base= (AVRational){1, 25};
1901 ap->pix_fmt = frame_pix_fmt;
1903 err = av_open_input_file(&ic, is->filename, is->iformat, 0, ap);
1905 print_error(is->filename, err);
1910 #ifdef CONFIG_RTSP_DEMUXER
1911 use_play = (ic->iformat == &rtsp_demuxer);
1917 ic->flags |= AVFMT_FLAG_GENPTS;
1920 err = av_find_stream_info(ic);
1922 fprintf(stderr, "%s: could not find codec parameters\n", is->filename);
1926 ic->pb.eof_reached= 0; //FIXME hack, ffplay maybe should not use url_feof() to test for the end
1929 /* if seeking requested, we execute it */
1930 if (start_time != AV_NOPTS_VALUE) {
1933 timestamp = start_time;
1934 /* add the stream start time */
1935 if (ic->start_time != AV_NOPTS_VALUE)
1936 timestamp += ic->start_time;
1937 ret = av_seek_frame(ic, -1, timestamp, AVSEEK_FLAG_BACKWARD);
1939 fprintf(stderr, "%s: could not seek to position %0.3f\n",
1940 is->filename, (double)timestamp / AV_TIME_BASE);
1944 /* now we can begin to play (RTSP stream only) */
1948 err = av_find_stream_info(ic);
1950 fprintf(stderr, "%s: could not find codec parameters\n", is->filename);
1956 for(i = 0; i < ic->nb_streams; i++) {
1957 AVCodecContext *enc = ic->streams[i]->codec;
1958 switch(enc->codec_type) {
1959 case CODEC_TYPE_AUDIO:
1960 if ((audio_index < 0 || wanted_audio_stream-- > 0) && !audio_disable)
1963 case CODEC_TYPE_VIDEO:
1964 if ((video_index < 0 || wanted_video_stream-- > 0) && !video_disable)
1972 dump_format(ic, 0, is->filename, 0);
1973 dump_stream_info(ic);
1976 /* open the streams */
1977 if (audio_index >= 0) {
1978 stream_component_open(is, audio_index);
1981 if (video_index >= 0) {
1982 stream_component_open(is, video_index);
1984 if (!display_disable)
1988 if (is->video_stream < 0 && is->audio_stream < 0) {
1989 fprintf(stderr, "%s: could not open codecs\n", is->filename);
1995 if (is->abort_request)
1997 if (is->paused != is->last_paused) {
1998 is->last_paused = is->paused;
2004 #ifdef CONFIG_RTSP_DEMUXER
2005 if (is->paused && ic->iformat == &rtsp_demuxer) {
2006 /* wait 10 ms to avoid trying to get another packet */
2013 int stream_index= -1;
2014 int64_t seek_target= is->seek_pos;
2016 if (is-> video_stream >= 0) stream_index= is-> video_stream;
2017 else if(is-> audio_stream >= 0) stream_index= is-> audio_stream;
2018 else if(is->subtitle_stream >= 0) stream_index= is->subtitle_stream;
2020 if(stream_index>=0){
2021 seek_target= av_rescale_q(seek_target, AV_TIME_BASE_Q, ic->streams[stream_index]->time_base);
2024 ret = av_seek_frame(is->ic, stream_index, seek_target, is->seek_flags);
2026 fprintf(stderr, "%s: error while seeking\n", is->ic->filename);
2028 if (is->audio_stream >= 0) {
2029 packet_queue_flush(&is->audioq);
2030 packet_queue_put(&is->audioq, &flush_pkt);
2032 if (is->subtitle_stream >= 0) {
2033 packet_queue_flush(&is->subtitleq);
2034 packet_queue_put(&is->subtitleq, &flush_pkt);
2036 if (is->video_stream >= 0) {
2037 packet_queue_flush(&is->videoq);
2038 packet_queue_put(&is->videoq, &flush_pkt);
2044 /* if the queue are full, no need to read more */
2045 if (is->audioq.size > MAX_AUDIOQ_SIZE ||
2046 is->videoq.size > MAX_VIDEOQ_SIZE ||
2047 is->subtitleq.size > MAX_SUBTITLEQ_SIZE ||
2048 url_feof(&ic->pb)) {
2053 ret = av_read_frame(ic, pkt);
2055 if (url_ferror(&ic->pb) == 0) {
2056 SDL_Delay(100); /* wait for user event */
2061 if (pkt->stream_index == is->audio_stream) {
2062 packet_queue_put(&is->audioq, pkt);
2063 } else if (pkt->stream_index == is->video_stream) {
2064 packet_queue_put(&is->videoq, pkt);
2065 } else if (pkt->stream_index == is->subtitle_stream) {
2066 packet_queue_put(&is->subtitleq, pkt);
2068 av_free_packet(pkt);
2071 /* wait until the end */
2072 while (!is->abort_request) {
2078 /* disable interrupting */
2079 global_video_state = NULL;
2081 /* close each stream */
2082 if (is->audio_stream >= 0)
2083 stream_component_close(is, is->audio_stream);
2084 if (is->video_stream >= 0)
2085 stream_component_close(is, is->video_stream);
2086 if (is->subtitle_stream >= 0)
2087 stream_component_close(is, is->subtitle_stream);
2089 av_close_input_file(is->ic);
2090 is->ic = NULL; /* safety */
2092 url_set_interrupt_cb(NULL);
2097 event.type = FF_QUIT_EVENT;
2098 event.user.data1 = is;
2099 SDL_PushEvent(&event);
2104 static VideoState *stream_open(const char *filename, AVInputFormat *iformat)
2108 is = av_mallocz(sizeof(VideoState));
2111 av_strlcpy(is->filename, filename, sizeof(is->filename));
2112 is->iformat = iformat;
2116 /* start video display */
2117 is->pictq_mutex = SDL_CreateMutex();
2118 is->pictq_cond = SDL_CreateCond();
2120 is->subpq_mutex = SDL_CreateMutex();
2121 is->subpq_cond = SDL_CreateCond();
2123 /* add the refresh timer to draw the picture */
2124 schedule_refresh(is, 40);
2126 is->av_sync_type = av_sync_type;
2127 is->parse_tid = SDL_CreateThread(decode_thread, is);
2128 if (!is->parse_tid) {
2135 static void stream_close(VideoState *is)
2139 /* XXX: use a special url_shutdown call to abort parse cleanly */
2140 is->abort_request = 1;
2141 SDL_WaitThread(is->parse_tid, NULL);
2143 /* free all pictures */
2144 for(i=0;i<VIDEO_PICTURE_QUEUE_SIZE; i++) {
2147 SDL_FreeYUVOverlay(vp->bmp);
2151 SDL_DestroyMutex(is->pictq_mutex);
2152 SDL_DestroyCond(is->pictq_cond);
2153 SDL_DestroyMutex(is->subpq_mutex);
2154 SDL_DestroyCond(is->subpq_cond);
2157 static void stream_cycle_channel(VideoState *is, int codec_type)
2159 AVFormatContext *ic = is->ic;
2160 int start_index, stream_index;
2163 if (codec_type == CODEC_TYPE_VIDEO)
2164 start_index = is->video_stream;
2165 else if (codec_type == CODEC_TYPE_AUDIO)
2166 start_index = is->audio_stream;
2168 start_index = is->subtitle_stream;
2169 if (start_index < (codec_type == CODEC_TYPE_SUBTITLE ? -1 : 0))
2171 stream_index = start_index;
2173 if (++stream_index >= is->ic->nb_streams)
2175 if (codec_type == CODEC_TYPE_SUBTITLE)
2182 if (stream_index == start_index)
2184 st = ic->streams[stream_index];
2185 if (st->codec->codec_type == codec_type) {
2186 /* check that parameters are OK */
2187 switch(codec_type) {
2188 case CODEC_TYPE_AUDIO:
2189 if (st->codec->sample_rate != 0 &&
2190 st->codec->channels != 0)
2193 case CODEC_TYPE_VIDEO:
2194 case CODEC_TYPE_SUBTITLE:
2202 stream_component_close(is, start_index);
2203 stream_component_open(is, stream_index);
2207 static void toggle_full_screen(void)
2209 is_full_screen = !is_full_screen;
2210 if (!fs_screen_width) {
2211 /* use default SDL method */
2212 // SDL_WM_ToggleFullScreen(screen);
2214 video_open(cur_stream);
2217 static void toggle_pause(void)
2220 stream_pause(cur_stream);
2224 static void step_to_next_frame(void)
2227 if (cur_stream->paused)
2228 cur_stream->paused=0;
2229 cur_stream->video_current_pts = get_video_clock(cur_stream);
2234 static void do_exit(void)
2237 stream_close(cur_stream);
2246 static void toggle_audio_display(void)
2249 cur_stream->show_audio = !cur_stream->show_audio;
2253 /* handle an event sent by the GUI */
2254 static void event_loop(void)
2257 double incr, pos, frac;
2260 SDL_WaitEvent(&event);
2261 switch(event.type) {
2263 switch(event.key.keysym.sym) {
2269 toggle_full_screen();
2275 case SDLK_s: //S: Step to next frame
2276 step_to_next_frame();
2280 stream_cycle_channel(cur_stream, CODEC_TYPE_AUDIO);
2284 stream_cycle_channel(cur_stream, CODEC_TYPE_VIDEO);
2288 stream_cycle_channel(cur_stream, CODEC_TYPE_SUBTITLE);
2291 toggle_audio_display();
2306 if (seek_by_bytes) {
2307 pos = url_ftell(&cur_stream->ic->pb);
2308 if (cur_stream->ic->bit_rate)
2309 incr *= cur_stream->ic->bit_rate / 60.0;
2313 stream_seek(cur_stream, pos, incr);
2315 pos = get_master_clock(cur_stream);
2317 stream_seek(cur_stream, (int64_t)(pos * AV_TIME_BASE), incr);
2325 case SDL_MOUSEBUTTONDOWN:
2328 int tns, thh, tmm, tss;
2329 tns = cur_stream->ic->duration/1000000LL;
2331 tmm = (tns%3600)/60;
2333 frac = (double)event.button.x/(double)cur_stream->width;
2338 fprintf(stderr, "Seek to %2.0f%% (%2d:%02d:%02d) of total duration (%2d:%02d:%02d) \n", frac*100,
2339 hh, mm, ss, thh, tmm, tss);
2340 stream_seek(cur_stream, (int64_t)(cur_stream->ic->start_time+frac*cur_stream->ic->duration), 0);
2343 case SDL_VIDEORESIZE:
2345 screen = SDL_SetVideoMode(event.resize.w, event.resize.h, 0,
2346 SDL_HWSURFACE|SDL_RESIZABLE|SDL_ASYNCBLIT|SDL_HWACCEL);
2347 screen_width = cur_stream->width = event.resize.w;
2348 screen_height= cur_stream->height= event.resize.h;
2355 case FF_ALLOC_EVENT:
2356 video_open(event.user.data1);
2357 alloc_picture(event.user.data1);
2359 case FF_REFRESH_EVENT:
2360 video_refresh_timer(event.user.data1);
2368 static void opt_frame_size(const char *arg)
2370 if (av_parse_video_frame_size(&frame_width, &frame_height, arg) < 0) {
2371 fprintf(stderr, "Incorrect frame size\n");
2374 if ((frame_width % 2) != 0 || (frame_height % 2) != 0) {
2375 fprintf(stderr, "Frame size must be a multiple of 2\n");
2380 static void opt_width(const char *arg)
2382 screen_width = atoi(arg);
2383 if(screen_width<=0){
2384 fprintf(stderr, "invalid width\n");
2389 static void opt_height(const char *arg)
2391 screen_height = atoi(arg);
2392 if(screen_height<=0){
2393 fprintf(stderr, "invalid height\n");
2398 static void opt_format(const char *arg)
2400 file_iformat = av_find_input_format(arg);
2401 if (!file_iformat) {
2402 fprintf(stderr, "Unknown input format: %s\n", arg);
2407 static void opt_frame_pix_fmt(const char *arg)
2409 frame_pix_fmt = avcodec_get_pix_fmt(arg);
2412 #ifdef CONFIG_RTSP_DEMUXER
2413 static void opt_rtp_tcp(void)
2415 /* only tcp protocol */
2416 rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_TCP);
2420 static void opt_sync(const char *arg)
2422 if (!strcmp(arg, "audio"))
2423 av_sync_type = AV_SYNC_AUDIO_MASTER;
2424 else if (!strcmp(arg, "video"))
2425 av_sync_type = AV_SYNC_VIDEO_MASTER;
2426 else if (!strcmp(arg, "ext"))
2427 av_sync_type = AV_SYNC_EXTERNAL_CLOCK;
2434 static void opt_seek(const char *arg)
2436 start_time = parse_date(arg, 1);
2439 static void opt_debug(const char *arg)
2445 static void opt_vismv(const char *arg)
2447 debug_mv = atoi(arg);
2450 static void opt_thread_count(const char *arg)
2452 thread_count= atoi(arg);
2453 #if !defined(HAVE_THREADS)
2454 fprintf(stderr, "Warning: not compiled with thread support, using thread emulation\n");
2458 static void opt_show_help(void)
2464 const OptionDef options[] = {
2465 { "h", 0, {(void*)opt_show_help}, "show help" },
2466 { "x", HAS_ARG, {(void*)opt_width}, "force displayed width", "width" },
2467 { "y", HAS_ARG, {(void*)opt_height}, "force displayed height", "height" },
2468 { "s", HAS_ARG | OPT_VIDEO, {(void*)opt_frame_size}, "set frame size (WxH or abbreviation)", "size" },
2469 { "fs", OPT_BOOL, {(void*)&is_full_screen}, "force full screen" },
2470 { "an", OPT_BOOL, {(void*)&audio_disable}, "disable audio" },
2471 { "vn", OPT_BOOL, {(void*)&video_disable}, "disable video" },
2472 { "ast", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&wanted_audio_stream}, "", "" },
2473 { "vst", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&wanted_video_stream}, "", "" },
2474 { "ss", HAS_ARG, {(void*)&opt_seek}, "seek to a given position in seconds", "pos" },
2475 { "bytes", OPT_BOOL, {(void*)&seek_by_bytes}, "seek by bytes" },
2476 { "nodisp", OPT_BOOL, {(void*)&display_disable}, "disable graphical display" },
2477 { "f", HAS_ARG, {(void*)opt_format}, "force format", "fmt" },
2478 { "pix_fmt", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_frame_pix_fmt}, "set pixel format", "format" },
2479 { "stats", OPT_BOOL | OPT_EXPERT, {(void*)&show_status}, "show status", "" },
2480 { "debug", HAS_ARG | OPT_EXPERT, {(void*)opt_debug}, "print specific debug info", "" },
2481 { "bug", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&workaround_bugs}, "workaround bugs", "" },
2482 { "vismv", HAS_ARG | OPT_EXPERT, {(void*)opt_vismv}, "visualize motion vectors", "" },
2483 { "fast", OPT_BOOL | OPT_EXPERT, {(void*)&fast}, "non spec compliant optimizations", "" },
2484 { "genpts", OPT_BOOL | OPT_EXPERT, {(void*)&genpts}, "generate pts", "" },
2485 { "drp", OPT_BOOL |OPT_EXPERT, {(void*)&decoder_reorder_pts}, "let decoder reorder pts", ""},
2486 { "lowres", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&lowres}, "", "" },
2487 { "skiploop", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&skip_loop_filter}, "", "" },
2488 { "skipframe", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&skip_frame}, "", "" },
2489 { "skipidct", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&skip_idct}, "", "" },
2490 { "idct", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&idct}, "set idct algo", "algo" },
2491 { "er", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&error_resilience}, "set error detection threshold (0-4)", "threshold" },
2492 { "ec", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&error_concealment}, "set error concealment options", "bit_mask" },
2493 #ifdef CONFIG_RTSP_DEMUXER
2494 { "rtp_tcp", OPT_EXPERT, {(void*)&opt_rtp_tcp}, "force RTP/TCP protocol usage", "" },
2496 { "sync", HAS_ARG | OPT_EXPERT, {(void*)opt_sync}, "set audio-video sync. type (type=audio/video/ext)", "type" },
2497 { "threads", HAS_ARG | OPT_EXPERT, {(void*)opt_thread_count}, "thread count", "count" },
2501 void show_help(void)
2503 printf("ffplay version " FFMPEG_VERSION ", Copyright (c) 2003-2007 Fabrice Bellard, et al.\n"
2504 "usage: ffplay [options] input_file\n"
2505 "Simple media player\n");
2507 show_help_options(options, "Main options:\n",
2509 show_help_options(options, "\nAdvanced options:\n",
2510 OPT_EXPERT, OPT_EXPERT);
2511 printf("\nWhile playing:\n"
2513 "f toggle full screen\n"
2515 "a cycle audio channel\n"
2516 "v cycle video channel\n"
2517 "t cycle subtitle channel\n"
2518 "w show audio waves\n"
2519 "left/right seek backward/forward 10 seconds\n"
2520 "down/up seek backward/forward 1 minute\n"
2521 "mouse click seek to percentage in file corresponding to fraction of width\n"
2525 void parse_arg_file(const char *filename)
2527 if (!strcmp(filename, "-"))
2529 input_filename = filename;
2532 /* Called from the main */
2533 int main(int argc, char **argv)
2537 /* register all codecs, demux and protocols */
2540 parse_options(argc, argv, options);
2542 if (!input_filename) {
2547 if (display_disable) {
2550 flags = SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_TIMER;
2551 #if !defined(__MINGW32__) && !defined(CONFIG_DARWIN)
2552 flags |= SDL_INIT_EVENTTHREAD; /* Not supported on win32 or darwin */
2554 if (SDL_Init (flags)) {
2555 fprintf(stderr, "Could not initialize SDL - %s\n", SDL_GetError());
2559 if (!display_disable) {
2560 #ifdef HAVE_SDL_VIDEO_SIZE
2561 const SDL_VideoInfo *vi = SDL_GetVideoInfo();
2562 fs_screen_width = vi->current_w;
2563 fs_screen_height = vi->current_h;
2567 SDL_EventState(SDL_ACTIVEEVENT, SDL_IGNORE);
2568 SDL_EventState(SDL_MOUSEMOTION, SDL_IGNORE);
2569 SDL_EventState(SDL_SYSWMEVENT, SDL_IGNORE);
2570 SDL_EventState(SDL_USEREVENT, SDL_IGNORE);
2572 av_init_packet(&flush_pkt);
2573 flush_pkt.data= "FLUSH";
2575 cur_stream = stream_open(input_filename, file_iformat);