Lines Matching refs:is
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
11 * FFmpeg is distributed in the hope that it will be useful,
81 /* no AV sync correction is done if below the minimum AV sync threshold */
83 /* AV sync correction is done if above the maximum AV sync threshold */
85 /* If a frame duration is longer than this, it will not be duplicated to compensate AV sync */
87 /* no AV correction is done if too big error */
148 int serial; /* clock is based on a packet with this serial */
657 av_log(d->avctx, AV_LOG_ERROR, "Receive_frame and send_packet both returned EAGAIN, which is an API violation.\n");
961 static void video_image_display(VideoState *is)
967 vp = frame_queue_peek_last(&is->pictq);
968 if (is->subtitle_st) {
969 if (frame_queue_nb_remaining(&is->subpq) > 0) {
970 sp = frame_queue_peek(&is->subpq);
981 if (realloc_texture(&is->sub_texture, SDL_PIXELFORMAT_ARGB8888, sp->width, sp->height, SDL_BLENDMODE_BLEND, 1) < 0)
992 is->sub_convert_ctx = sws_getCachedContext(is->sub_convert_ctx,
996 if (!is->sub_convert_ctx) {
1000 if (!SDL_LockTexture(is->sub_texture, (SDL_Rect *)sub_rect, (void **)pixels, pitch)) {
1001 sws_scale(is->sub_convert_ctx, (const uint8_t * const *)sub_rect->data, sub_rect->linesize,
1003 SDL_UnlockTexture(is->sub_texture);
1013 calculate_display_rect(&rect, is->xleft, is->ytop, is->width, is->height, vp->width, vp->height, vp->sar);
1017 if (upload_texture(&is->vid_texture, vp->frame, &is->img_convert_ctx) < 0) {
1025 SDL_RenderCopyEx(renderer, is->vid_texture, NULL, &rect, 0, NULL, vp->flip_v ? SDL_FLIP_VERTICAL : 0);
1029 SDL_RenderCopy(renderer, is->sub_texture, NULL, &rect);
1040 SDL_RenderCopy(renderer, is->sub_texture, sub_rect, &target);
1170 * directly access it but it is more than fast enough. */
1193 static void stream_component_close(VideoState *is, int stream_index)
1195 AVFormatContext *ic = is->ic;
1204 decoder_abort(&is->auddec, &is->sampq);
1206 decoder_destroy(&is->auddec);
1207 swr_free(&is->swr_ctx);
1208 av_freep(&is->audio_buf1);
1209 is->audio_buf1_size = 0;
1210 is->audio_buf = NULL;
1212 if (is->rdft) {
1213 av_rdft_end(is->rdft);
1214 av_freep(&is->rdft_data);
1215 is->rdft = NULL;
1216 is->rdft_bits = 0;
1220 decoder_abort(&is->viddec, &is->pictq);
1221 decoder_destroy(&is->viddec);
1224 decoder_abort(&is->subdec, &is->subpq);
1225 decoder_destroy(&is->subdec);
1234 is->audio_st = NULL;
1235 is->audio_stream = -1;
1238 is->video_st = NULL;
1239 is->video_stream = -1;
1242 is->subtitle_st = NULL;
1243 is->subtitle_stream = -1;
1250 static void stream_close(VideoState *is)
1253 is->abort_request = 1;
1254 SDL_WaitThread(is->read_tid, NULL);
1257 if (is->audio_stream >= 0)
1258 stream_component_close(is, is->audio_stream);
1259 if (is->video_stream >= 0)
1260 stream_component_close(is, is->video_stream);
1261 if (is->subtitle_stream >= 0)
1262 stream_component_close(is, is->subtitle_stream);
1264 avformat_close_input(&is->ic);
1266 packet_queue_destroy(&is->videoq);
1267 packet_queue_destroy(&is->audioq);
1268 packet_queue_destroy(&is->subtitleq);
1271 frame_queue_destory(&is->pictq);
1272 frame_queue_destory(&is->sampq);
1273 frame_queue_destory(&is->subpq);
1274 SDL_DestroyCond(is->continue_read_thread);
1275 sws_freeContext(is->img_convert_ctx);
1276 sws_freeContext(is->sub_convert_ctx);
1277 av_free(is->filename);
1278 if (is->vis_texture)
1279 SDL_DestroyTexture(is->vis_texture);
1280 if (is->vid_texture)
1281 SDL_DestroyTexture(is->vid_texture);
1282 if (is->sub_texture)
1283 SDL_DestroyTexture(is->sub_texture);
1284 av_free(is);
1287 static void do_exit(VideoState *is)
1289 if (is) {
1290 stream_close(is);
1325 static int video_open(VideoState *is)
1342 is->width = w;
1343 is->height = h;
1349 static void video_display(VideoState *is)
1351 if (!is->width)
1352 video_open(is);
1356 if (is->audio_st && is->show_mode != SHOW_MODE_VIDEO)
1357 video_audio_display(is);
1358 else if (is->video_st)
1359 video_image_display(is);
1411 static int get_master_sync_type(VideoState *is) {
1412 if (is->av_sync_type == AV_SYNC_VIDEO_MASTER) {
1413 if (is->video_st)
1417 } else if (is->av_sync_type == AV_SYNC_AUDIO_MASTER) {
1418 if (is->audio_st)
1428 static double get_master_clock(VideoState *is)
1432 switch (get_master_sync_type(is)) {
1434 val = get_clock(&is->vidclk);
1437 val = get_clock(&is->audclk);
1440 val = get_clock(&is->extclk);
1446 static void check_external_clock_speed(VideoState *is) {
1447 if (is->video_stream >= 0 && is->videoq.nb_packets <= EXTERNAL_CLOCK_MIN_FRAMES ||
1448 is->audio_stream >= 0 && is->audioq.nb_packets <= EXTERNAL_CLOCK_MIN_FRAMES) {
1449 set_clock_speed(&is->extclk, FFMAX(EXTERNAL_CLOCK_SPEED_MIN, is->extclk.speed - EXTERNAL_CLOCK_SPEED_STEP));
1450 } else if ((is->video_stream < 0 || is->videoq.nb_packets > EXTERNAL_CLOCK_MAX_FRAMES) &&
1451 (is->audio_stream < 0 || is->audioq.nb_packets > EXTERNAL_CLOCK_MAX_FRAMES)) {
1452 set_clock_speed(&is->extclk, FFMIN(EXTERNAL_CLOCK_SPEED_MAX, is->extclk.speed + EXTERNAL_CLOCK_SPEED_STEP));
1454 double speed = is->extclk.speed;
1456 set_clock_speed(&is->extclk, speed + EXTERNAL_CLOCK_SPEED_STEP * (1.0 - speed) / fabs(1.0 - speed));
1461 static void stream_seek(VideoState *is, int64_t pos, int64_t rel, int by_bytes)
1463 if (!is->seek_req) {
1464 is->seek_pos = pos;
1465 is->seek_rel = rel;
1466 is->seek_flags &= ~AVSEEK_FLAG_BYTE;
1468 is->seek_flags |= AVSEEK_FLAG_BYTE;
1469 is->seek_req = 1;
1470 SDL_CondSignal(is->continue_read_thread);
1475 static void stream_toggle_pause(VideoState *is)
1477 if (is->paused) {
1478 is->frame_timer += av_gettime_relative() / 1000000.0 - is->vidclk.last_updated;
1479 if (is->read_pause_return != AVERROR(ENOSYS)) {
1480 is->vidclk.paused = 0;
1482 set_clock(&is->vidclk, get_clock(&is->vidclk), is->vidclk.serial);
1484 set_clock(&is->extclk, get_clock(&is->extclk), is->extclk.serial);
1485 is->paused = is->audclk.paused = is->vidclk.paused = is->extclk.paused = !is->paused;
1488 static void toggle_pause(VideoState *is)
1490 stream_toggle_pause(is);
1491 is->step = 0;
1494 static void toggle_mute(VideoState *is)
1496 is->muted = !is->muted;
1499 static void update_volume(VideoState *is, int sign, double step)
1501 double volume_level = is->audio_volume ? (20 * log(is->audio_volume / (double)SDL_MIX_MAXVOLUME) / log(10)) : -1000.0;
1503 is->audio_volume = av_clip(is->audio_volume == new_volume ? (is->audio_volume + sign) : new_volume, 0, SDL_MIX_MAXVOLUME);
1506 static void step_to_next_frame(VideoState *is)
1508 /* if the stream is paused unpause it, then step */
1509 if (is->paused)
1510 stream_toggle_pause(is);
1511 is->step = 1;
1514 static double compute_target_delay(double delay, VideoState *is)
1519 if (get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER) {
1520 /* if video is slave, we try to correct big delays by
1522 diff = get_clock(&is->vidclk) - get_master_clock(is);
1526 if it is the best guess */
1528 if (!isnan(diff) && fabs(diff) < is->max_frame_duration) {
1544 static double vp_duration(VideoState *is, Frame *vp, Frame *nextvp) {
1547 if (isnan(duration) || duration <= 0 || duration > is->max_frame_duration)
1556 static void update_video_pts(VideoState *is, double pts, int64_t pos, int serial) {
1558 set_clock(&is->vidclk, pts, serial);
1559 sync_clock_to_slave(&is->extclk, &is->vidclk);
1565 VideoState *is = opaque;
1570 if (!is->paused && get_master_sync_type(is) == AV_SYNC_EXTERNAL_CLOCK && is->realtime)
1571 check_external_clock_speed(is);
1573 if (!display_disable && is->show_mode != SHOW_MODE_VIDEO && is->audio_st) {
1575 if (is->force_refresh || is->last_vis_time + rdftspeed < time) {
1576 video_display(is);
1577 is->last_vis_time = time;
1579 *remaining_time = FFMIN(*remaining_time, is->last_vis_time + rdftspeed - time);
1582 if (is->video_st) {
1584 if (frame_queue_nb_remaining(&is->pictq) == 0) {
1591 lastvp = frame_queue_peek_last(&is->pictq);
1592 vp = frame_queue_peek(&is->pictq);
1594 if (vp->serial != is->videoq.serial) {
1595 frame_queue_next(&is->pictq);
1600 is->frame_timer = av_gettime_relative() / 1000000.0;
1602 if (is->paused)
1606 last_duration = vp_duration(is, lastvp, vp);
1607 delay = compute_target_delay(last_duration, is);
1610 if (time < is->frame_timer + delay) {
1611 *remaining_time = FFMIN(is->frame_timer + delay - time, *remaining_time);
1615 is->frame_timer += delay;
1616 if (delay > 0 && time - is->frame_timer > AV_SYNC_THRESHOLD_MAX)
1617 is->frame_timer = time;
1619 SDL_LockMutex(is->pictq.mutex);
1621 update_video_pts(is, vp->pts, vp->pos, vp->serial);
1622 SDL_UnlockMutex(is->pictq.mutex);
1624 if (frame_queue_nb_remaining(&is->pictq) > 1) {
1625 Frame *nextvp = frame_queue_peek_next(&is->pictq);
1626 duration = vp_duration(is, vp, nextvp);
1627 if(!is->step && (framedrop>0 || (framedrop && get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER)) && time > is->frame_timer + duration){
1628 is->frame_drops_late++;
1629 frame_queue_next(&is->pictq);
1634 if (is->subtitle_st) {
1635 while (frame_queue_nb_remaining(&is->subpq) > 0) {
1636 sp = frame_queue_peek(&is->subpq);
1638 if (frame_queue_nb_remaining(&is->subpq) > 1)
1639 sp2 = frame_queue_peek_next(&is->subpq);
1643 if (sp->serial != is->subtitleq.serial
1644 || (is->vidclk.pts > (sp->pts + ((float) sp->sub.end_display_time / 1000)))
1645 || (sp2 && is->vidclk.pts > (sp2->pts + ((float) sp2->sub.start_display_time / 1000))))
1654 if (!SDL_LockTexture(is->sub_texture, (SDL_Rect *)sub_rect, (void **)&pixels, &pitch)) {
1657 SDL_UnlockTexture(is->sub_texture);
1661 frame_queue_next(&is->subpq);
1668 frame_queue_next(&is->pictq);
1669 is->force_refresh = 1;
1671 if (is->step && !is->paused)
1672 stream_toggle_pause(is);
1676 if (!display_disable && is->force_refresh && is->show_mode == SHOW_MODE_VIDEO && is->pictq.rindex_shown)
1677 video_display(is);
1679 is->force_refresh = 0;
1692 if (is->audio_st)
1693 aqsize = is->audioq.size;
1694 if (is->video_st)
1695 vqsize = is->videoq.size;
1696 if (is->subtitle_st)
1697 sqsize = is->subtitleq.size;
1699 if (is->audio_st && is->video_st)
1700 av_diff = get_clock(&is->audclk) - get_clock(&is->vidclk);
1701 else if (is->video_st)
1702 av_diff = get_master_clock(is) - get_clock(&is->vidclk);
1703 else if (is->audio_st)
1704 av_diff = get_master_clock(is) - get_clock(&is->audclk);
1709 get_master_clock(is),
1710 (is->audio_st && is->video_st) ? "A-V" : (is->video_st ? "M-V" : (is->audio_st ? "M-A" : " ")),
1712 is->frame_drops_early + is->frame_drops_late,
1716 is->video_st ? is->viddec.avctx->pts_correction_num_faulty_dts : 0,
1717 is->video_st ? is->viddec.avctx->pts_correction_num_faulty_pts : 0);
1732 static int queue_picture(VideoState *is, AVFrame *src_frame, double pts, double duration, int64_t pos, int serial)
1741 if (!(vp = frame_queue_peek_writable(&is->pictq)))
1759 frame_queue_push(&is->pictq);
1763 static int get_video_frame(VideoState *is, AVFrame *frame)
1767 if ((got_picture = decoder_decode_frame(&is->viddec, frame, NULL)) < 0)
1774 dpts = av_q2d(is->video_st->time_base) * frame->pts;
1776 frame->sample_aspect_ratio = av_guess_sample_aspect_ratio(is->ic, is->video_st, frame);
1778 if (framedrop>0 || (framedrop && get_master_sync_type(is) != AV_SYNC_VIDEO_MASTER)) {
1780 double diff = dpts - get_master_clock(is);
1782 diff - is->frame_last_filter_delay < 0 &&
1783 is->viddec.pkt_serial == is->vidclk.serial &&
1784 is->videoq.nb_packets) {
1785 is->frame_drops_early++;
1840 static int configure_video_filters(AVFilterGraph *graph, VideoState *is, const char *vfilters, AVFrame *frame)
1847 AVCodecParameters *codecpar = is->video_st->codecpar;
1848 AVRational fr = av_guess_frame_rate(is->ic, is->video_st, NULL);
1877 is->video_st->time_base.num, is->video_st->time_base.den,
1900 * processing order of the filters is in reverse */
1918 int32_t *displaymatrix = (int32_t *)av_stream_get_side_data(is->video_st, AV_PKT_DATA_DISPLAYMATRIX, NULL);
1938 is->in_video_filter = filt_src;
1939 is->out_video_filter = filt_out;
1945 static int configure_audio_filters(VideoState *is, const char *afilters, int force_output_format)
1956 avfilter_graph_free(&is->agraph);
1957 if (!(is->agraph = avfilter_graph_alloc()))
1959 is->agraph->nb_threads = filter_nbthreads;
1967 av_opt_set(is->agraph, "aresample_swr_opts", aresample_swr_opts, 0);
1969 av_channel_layout_describe_bprint(&is->audio_filter_src.ch_layout, &bp);
1973 is->audio_filter_src.freq, av_get_sample_fmt_name(is->audio_filter_src.fmt),
1974 1, is->audio_filter_src.freq, bp.str);
1978 asrc_args, NULL, is->agraph);
1985 NULL, NULL, is->agraph);
1995 sample_rates [0] = is->audio_tgt.freq;
2005 if ((ret = configure_filtergraph(is->agraph, afilters, filt_asrc, filt_asink)) < 0)
2008 is->in_audio_filter = filt_asrc;
2009 is->out_audio_filter = filt_asink;
2013 avfilter_graph_free(&is->agraph);
2022 VideoState *is = arg;
2037 if ((got_frame = decoder_decode_frame(&is->auddec, frame, NULL)) < 0)
2045 cmp_audio_fmts(is->audio_filter_src.fmt, is->audio_filter_src.ch_layout.nb_channels,
2047 av_channel_layout_compare(&is->audio_filter_src.ch_layout, &frame->ch_layout) ||
2048 is->audio_filter_src.freq != frame->sample_rate ||
2049 is->auddec.pkt_serial != last_serial;
2053 av_channel_layout_describe(&is->audio_filter_src.ch_layout, buf1, sizeof(buf1));
2057 is->audio_filter_src.freq, is->audio_filter_src.ch_layout.nb_channels, av_get_sample_fmt_name(is->audio_filter_src.fmt), buf1, last_serial,
2058 frame->sample_rate, frame->ch_layout.nb_channels, av_get_sample_fmt_name(frame->format), buf2, is->auddec.pkt_serial);
2060 is->audio_filter_src.fmt = frame->format;
2061 ret = av_channel_layout_copy(&is->audio_filter_src.ch_layout, &frame->ch_layout);
2064 is->audio_filter_src.freq = frame->sample_rate;
2065 last_serial = is->auddec.pkt_serial;
2067 if ((ret = configure_audio_filters(is, afilters, 1)) < 0)
2071 if ((ret = av_buffersrc_add_frame(is->in_audio_filter, frame)) < 0)
2074 while ((ret = av_buffersink_get_frame_flags(is->out_audio_filter, frame, 0)) >= 0) {
2075 tb = av_buffersink_get_time_base(is->out_audio_filter);
2077 if (!(af = frame_queue_peek_writable(&is->sampq)))
2082 af->serial = is->auddec.pkt_serial;
2086 frame_queue_push(&is->sampq);
2089 if (is->audioq.serial != is->auddec.pkt_serial)
2093 is->auddec.finished = is->auddec.pkt_serial;
2099 avfilter_graph_free(&is->agraph);
2118 VideoState *is = arg;
2123 AVRational tb = is->video_st->time_base;
2124 AVRational frame_rate = av_guess_frame_rate(is->ic, is->video_st, NULL);
2140 ret = get_video_frame(is, frame);
2150 || last_serial != is->viddec.pkt_serial
2151 || last_vfilter_idx != is->vfilter_idx) {
2157 (const char *)av_x_if_null(av_get_pix_fmt_name(frame->format), "none"), is->viddec.pkt_serial);
2165 if ((ret = configure_video_filters(graph, is, vfilters_list ? vfilters_list[is->vfilter_idx] : NULL, frame)) < 0) {
2168 event.user.data1 = is;
2172 filt_in = is->in_video_filter;
2173 filt_out = is->out_video_filter;
2177 last_serial = is->viddec.pkt_serial;
2178 last_vfilter_idx = is->vfilter_idx;
2187 is->frame_last_returned_time = av_gettime_relative() / 1000000.0;
2192 is->viddec.finished = is->viddec.pkt_serial;
2197 is->frame_last_filter_delay = av_gettime_relative() / 1000000.0 - is->frame_last_returned_time;
2198 if (fabs(is->frame_last_filter_delay) > AV_NOSYNC_THRESHOLD / 10.0)
2199 is->frame_last_filter_delay = 0;
2204 ret = queue_picture(is, frame, pts, duration, frame->pkt_pos, is->viddec.pkt_serial);
2207 if (is->videoq.serial != is->viddec.pkt_serial)
2225 VideoState *is = arg;
2231 if (!(sp = frame_queue_peek_writable(&is->subpq)))
2234 if ((got_subtitle = decoder_decode_frame(&is->subdec, NULL, &sp->sub)) < 0)
2243 sp->serial = is->subdec.pkt_serial;
2244 sp->width = is->subdec.avctx->width;
2245 sp->height = is->subdec.avctx->height;
2249 frame_queue_push(&is->subpq);
2258 static void update_sample_display(VideoState *is, short *samples, int samples_size)
2264 len = SAMPLE_ARRAY_SIZE - is->sample_array_index;
2267 memcpy(is->sample_array + is->sample_array_index, samples, len * sizeof(short));
2269 is->sample_array_index += len;
2270 if (is->sample_array_index >= SAMPLE_ARRAY_SIZE)
2271 is->sample_array_index = 0;
2276 /* return the wanted number of samples to get better sync if sync_type is video
2278 static int synchronize_audio(VideoState *is, int nb_samples)
2283 if (get_master_sync_type(is) != AV_SYNC_AUDIO_MASTER) {
2287 diff = get_clock(&is->audclk) - get_master_clock(is);
2290 is->audio_diff_cum = diff + is->audio_diff_avg_coef * is->audio_diff_cum;
2291 if (is->audio_diff_avg_count < AUDIO_DIFF_AVG_NB) {
2293 is->audio_diff_avg_count++;
2296 avg_diff = is->audio_diff_cum * (1.0 - is->audio_diff_avg_coef);
2298 if (fabs(avg_diff) >= is->audio_diff_threshold) {
2299 wanted_nb_samples = nb_samples + (int)(diff * is->audio_src.freq);
2306 is->audio_clock, is->audio_diff_threshold);
2311 is->audio_diff_avg_count = 0;
2312 is->audio_diff_cum = 0;
2322 * The processed audio frame is decoded, converted if required, and
2323 * stored in is->audio_buf, with size in bytes given by the return
2326 static int audio_decode_frame(VideoState *is)
2333 if (is->paused)
2338 while (frame_queue_nb_remaining(&is->sampq) == 0) {
2339 if ((av_gettime_relative() - audio_callback_time) > 1000000LL * is->audio_hw_buf_size / is->audio_tgt.bytes_per_sec / 2)
2344 if (!(af = frame_queue_peek_readable(&is->sampq)))
2346 frame_queue_next(&is->sampq);
2347 } while (af->serial != is->audioq.serial);
2353 wanted_nb_samples = synchronize_audio(is, af->frame->nb_samples);
2355 if (af->frame->format != is->audio_src.fmt ||
2356 av_channel_layout_compare(&af->frame->ch_layout, &is->audio_src.ch_layout) ||
2357 af->frame->sample_rate != is->audio_src.freq ||
2358 (wanted_nb_samples != af->frame->nb_samples && !is->swr_ctx)) {
2359 swr_free(&is->swr_ctx);
2360 swr_alloc_set_opts2(&is->swr_ctx,
2361 &is->audio_tgt.ch_layout, is->audio_tgt.fmt, is->audio_tgt.freq,
2364 if (!is->swr_ctx || swr_init(is->swr_ctx) < 0) {
2368 is->audio_tgt.freq, av_get_sample_fmt_name(is->audio_tgt.fmt), is->audio_tgt.ch_layout.nb_channels);
2369 swr_free(&is->swr_ctx);
2372 if (av_channel_layout_copy(&is->audio_src.ch_layout, &af->frame->ch_layout) < 0)
2374 is->audio_src.freq = af->frame->sample_rate;
2375 is->audio_src.fmt = af->frame->format;
2378 if (is->swr_ctx) {
2380 uint8_t **out = &is->audio_buf1;
2381 int out_count = (int64_t)wanted_nb_samples * is->audio_tgt.freq / af->frame->sample_rate + 256;
2382 int out_size = av_samples_get_buffer_size(NULL, is->audio_tgt.ch_layout.nb_channels, out_count, is->audio_tgt.fmt, 0);
2389 if (swr_set_compensation(is->swr_ctx, (wanted_nb_samples - af->frame->nb_samples) * is->audio_tgt.freq / af->frame->sample_rate,
2390 wanted_nb_samples * is->audio_tgt.freq / af->frame->sample_rate) < 0) {
2395 av_fast_malloc(&is->audio_buf1, &is->audio_buf1_size, out_size);
2396 if (!is->audio_buf1)
2398 len2 = swr_convert(is->swr_ctx, out, out_count, in, af->frame->nb_samples);
2404 av_log(NULL, AV_LOG_WARNING, "audio buffer is probably too small\n");
2405 if (swr_init(is->swr_ctx) < 0)
2406 swr_free(&is->swr_ctx);
2408 is->audio_buf = is->audio_buf1;
2409 resampled_data_size = len2 * is->audio_tgt.ch_layout.nb_channels * av_get_bytes_per_sample(is->audio_tgt.fmt);
2411 is->audio_buf = af->frame->data[0];
2415 audio_clock0 = is->audio_clock;
2418 is->audio_clock = af->pts + (double) af->frame->nb_samples / af->frame->sample_rate;
2420 is->audio_clock = NAN;
2421 is->audio_clock_serial = af->serial;
2426 is->audio_clock - last_clock,
2427 is->audio_clock, audio_clock0);
2428 last_clock = is->audio_clock;
2437 VideoState *is = opaque;
2443 if (is->audio_buf_index >= is->audio_buf_size) {
2444 audio_size = audio_decode_frame(is);
2447 is->audio_buf = NULL;
2448 is->audio_buf_size = SDL_AUDIO_MIN_BUFFER_SIZE / is->audio_tgt.frame_size * is->audio_tgt.frame_size;
2450 if (is->show_mode != SHOW_MODE_VIDEO)
2451 update_sample_display(is, (int16_t *)is->audio_buf, audio_size);
2452 is->audio_buf_size = audio_size;
2454 is->audio_buf_index = 0;
2456 len1 = is->audio_buf_size - is->audio_buf_index;
2459 if (!is->muted && is->audio_buf && is->audio_volume == SDL_MIX_MAXVOLUME)
2460 memcpy(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, len1);
2463 if (!is->muted && is->audio_buf)
2464 SDL_MixAudioFormat(stream, (uint8_t *)is->audio_buf + is->audio_buf_index, AUDIO_S16SYS, len1, is->audio_volume);
2468 is->audio_buf_index += len1;
2470 is->audio_write_buf_size = is->audio_buf_size - is->audio_buf_index;
2471 /* Let's assume the audio driver that is used by SDL has two periods. */
2472 if (!isnan(is->audio_clock)) {
2473 set_clock_at(&is->audclk, is->audio_clock - (double)(2 * is->audio_hw_buf_size + is->audio_write_buf_size) / is->audio_tgt.bytes_per_sec, is->audio_clock_serial, audio_callback_time / 1000000.0);
2474 sync_clock_to_slave(&is->extclk, &is->audclk);
2528 "SDL advised audio format %d is not supported!\n", spec.format);
2536 "SDL advised channel count %d is not supported!\n", spec.channels);
2555 static int stream_component_open(VideoState *is, int stream_index)
2557 AVFormatContext *ic = is->ic;
2583 case AVMEDIA_TYPE_AUDIO : is->last_audio_stream = stream_index; forced_codec_name = audio_codec_name; break;
2584 case AVMEDIA_TYPE_SUBTITLE: is->last_subtitle_stream = stream_index; forced_codec_name = subtitle_codec_name; break;
2585 case AVMEDIA_TYPE_VIDEO : is->last_video_stream = stream_index; forced_codec_name = video_codec_name; break;
2600 av_log(avctx, AV_LOG_WARNING, "The maximum value for lowres supported by the decoder is %d\n",
2623 is->eof = 0;
2631 is->audio_filter_src.freq = avctx->sample_rate;
2632 ret = av_channel_layout_copy(&is->audio_filter_src.ch_layout, &avctx->ch_layout);
2635 is->audio_filter_src.fmt = avctx->sample_fmt;
2636 if ((ret = configure_audio_filters(is, afilters, 0)) < 0)
2638 sink = is->out_audio_filter;
2652 if ((ret = audio_open(is, &ch_layout, sample_rate, &is->audio_tgt)) < 0)
2654 is->audio_hw_buf_size = ret;
2655 is->audio_src = is->audio_tgt;
2656 is->audio_buf_size = 0;
2657 is->audio_buf_index = 0;
2660 is->audio_diff_avg_coef = exp(log(0.01) / AUDIO_DIFF_AVG_NB);
2661 is->audio_diff_avg_count = 0;
2664 is->audio_diff_threshold = (double)(is->audio_hw_buf_size) / is->audio_tgt.bytes_per_sec;
2666 is->audio_stream = stream_index;
2667 is->audio_st = ic->streams[stream_index];
2669 if ((ret = decoder_init(&is->auddec, avctx, &is->audioq, is->continue_read_thread)) < 0)
2671 if ((is->ic->iformat->flags & (AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK)) && !is->ic->iformat->read_seek) {
2672 is->auddec.start_pts = is->audio_st->start_time;
2673 is->auddec.start_pts_tb = is->audio_st->time_base;
2675 if ((ret = decoder_start(&is->auddec, audio_thread, "audio_decoder", is)) < 0)
2680 is->video_stream = stream_index;
2681 is->video_st = ic->streams[stream_index];
2683 if ((ret = decoder_init(&is->viddec, avctx, &is->videoq, is->continue_read_thread)) < 0)
2685 if ((ret = decoder_start(&is->viddec, video_thread, "video_decoder", is)) < 0)
2687 is->queue_attachments_req = 1;
2690 is->subtitle_stream = stream_index;
2691 is->subtitle_st = ic->streams[stream_index];
2693 if ((ret = decoder_init(&is->subdec, avctx, &is->subtitleq, is->continue_read_thread)) < 0)
2695 if ((ret = decoder_start(&is->subdec, subtitle_thread, "subtitle_decoder", is)) < 0)
2714 VideoState *is = ctx;
2715 return is->abort_request;
2744 VideoState *is = arg;
2763 is->eof = 0;
2778 ic->interrupt_callback.opaque = is;
2783 err = avformat_open_input(&ic, is->filename, is->iformat, &format_opts);
2785 print_error(is->filename, err);
2797 is->ic = ic;
2816 "%s: could not find codec parameters\n", is->filename);
2830 is->max_frame_duration = (ic->iformat->flags & AVFMT_TS_DISCONT) ? 10.0 : 3600.0;
2846 is->filename, (double)timestamp / AV_TIME_BASE);
2850 is->realtime = is_realtime(ic);
2853 av_dump_format(ic, 0, is->filename, 0);
2889 is->show_mode = show_mode;
2900 stream_component_open(is, st_index[AVMEDIA_TYPE_AUDIO]);
2905 ret = stream_component_open(is, st_index[AVMEDIA_TYPE_VIDEO]);
2907 if (is->show_mode == SHOW_MODE_NONE)
2908 is->show_mode = ret >= 0 ? SHOW_MODE_VIDEO : SHOW_MODE_RDFT;
2911 stream_component_open(is, st_index[AVMEDIA_TYPE_SUBTITLE]);
2914 if (is->video_stream < 0 && is->audio_stream < 0) {
2916 is->filename);
2921 if (infinite_buffer < 0 && is->realtime)
2925 if (is->abort_request)
2927 if (is->paused != is->last_paused) {
2928 is->last_paused = is->paused;
2929 if (is->paused)
2930 is->read_pause_return = av_read_pause(ic);
2935 if (is->paused &&
2944 if (is->seek_req) {
2945 int64_t seek_target = is->seek_pos;
2946 int64_t seek_min = is->seek_rel > 0 ? seek_target - is->seek_rel + 2: INT64_MIN;
2947 int64_t seek_max = is->seek_rel < 0 ? seek_target - is->seek_rel - 2: INT64_MAX;
2948 // FIXME the +-2 is due to rounding being not done in the correct direction in generation
2951 ret = avformat_seek_file(is->ic, -1, seek_min, seek_target, seek_max, is->seek_flags);
2954 "%s: error while seeking\n", is->ic->url);
2956 if (is->audio_stream >= 0)
2957 packet_queue_flush(&is->audioq);
2958 if (is->subtitle_stream >= 0)
2959 packet_queue_flush(&is->subtitleq);
2960 if (is->video_stream >= 0)
2961 packet_queue_flush(&is->videoq);
2962 if (is->seek_flags & AVSEEK_FLAG_BYTE) {
2963 set_clock(&is->extclk, NAN, 0);
2965 set_clock(&is->extclk, seek_target / (double)AV_TIME_BASE, 0);
2968 is->seek_req = 0;
2969 is->queue_attachments_req = 1;
2970 is->eof = 0;
2971 if (is->paused)
2972 step_to_next_frame(is);
2974 if (is->queue_attachments_req) {
2975 if (is->video_st && is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC) {
2976 if ((ret = av_packet_ref(pkt, &is->video_st->attached_pic)) < 0)
2978 packet_queue_put(&is->videoq, pkt);
2979 packet_queue_put_nullpacket(&is->videoq, pkt, is->video_stream);
2981 is->queue_attachments_req = 0;
2986 (is->audioq.size + is->videoq.size + is->subtitleq.size > MAX_QUEUE_SIZE
2987 || (stream_has_enough_packets(is->audio_st, is->audio_stream, &is->audioq) &&
2988 stream_has_enough_packets(is->video_st, is->video_stream, &is->videoq) &&
2989 stream_has_enough_packets(is->subtitle_st, is->subtitle_stream, &is->subtitleq)))) {
2992 SDL_CondWaitTimeout(is->continue_read_thread, wait_mutex, 10);
2996 if (!is->paused &&
2997 (!is->audio_st || (is->auddec.finished == is->audioq.serial && frame_queue_nb_remaining(&is->sampq) == 0)) &&
2998 (!is->video_st || (is->viddec.finished == is->videoq.serial && frame_queue_nb_remaining(&is->pictq) == 0))) {
3000 stream_seek(is, start_time != AV_NOPTS_VALUE ? start_time : 0, 0, 0);
3008 if ((ret == AVERROR_EOF || avio_feof(ic->pb)) && !is->eof) {
3009 if (is->video_stream >= 0)
3010 packet_queue_put_nullpacket(&is->videoq, pkt, is->video_stream);
3011 if (is->audio_stream >= 0)
3012 packet_queue_put_nullpacket(&is->audioq, pkt, is->audio_stream);
3013 if (is->subtitle_stream >= 0)
3014 packet_queue_put_nullpacket(&is->subtitleq, pkt, is->subtitle_stream);
3015 is->eof = 1;
3024 SDL_CondWaitTimeout(is->continue_read_thread, wait_mutex, 10);
3028 is->eof = 0;
3030 /* check if packet is in play range specified by user, then queue, otherwise discard */
3038 if (pkt->stream_index == is->audio_stream && pkt_in_play_range) {
3039 packet_queue_put(&is->audioq, pkt);
3040 } else if (pkt->stream_index == is->video_stream && pkt_in_play_range
3041 && !(is->video_st->disposition & AV_DISPOSITION_ATTACHED_PIC)) {
3042 packet_queue_put(&is->videoq, pkt);
3043 } else if (pkt->stream_index == is->subtitle_stream && pkt_in_play_range) {
3044 packet_queue_put(&is->subtitleq, pkt);
3052 if (ic && !is->ic)
3060 event.user.data1 = is;
3070 VideoState *is;
3072 is = av_mallocz(sizeof(VideoState));
3073 if (!is)
3075 is->last_video_stream = is->video_stream = -1;
3076 is->last_audio_stream = is->audio_stream = -1;
3077 is->last_subtitle_stream = is->subtitle_stream = -1;
3078 is->filename = av_strdup(filename);
3079 if (!is->filename)
3081 is->iformat = iformat;
3082 is->ytop = 0;
3083 is->xleft = 0;
3086 if (frame_queue_init(&is->pictq, &is->videoq, VIDEO_PICTURE_QUEUE_SIZE, 1) < 0)
3088 if (frame_queue_init(&is->subpq, &is->subtitleq, SUBPICTURE_QUEUE_SIZE, 0) < 0)
3090 if (frame_queue_init(&is->sampq, &is->audioq, SAMPLE_QUEUE_SIZE, 1) < 0)
3093 if (packet_queue_init(&is->videoq) < 0 ||
3094 packet_queue_init(&is->audioq) < 0 ||
3095 packet_queue_init(&is->subtitleq) < 0)
3098 if (!(is->continue_read_thread = SDL_CreateCond())) {
3103 init_clock(&is->vidclk, &is->videoq.serial);
3104 init_clock(&is->audclk, &is->audioq.serial);
3105 init_clock(&is->extclk, &is->extclk.serial);
3106 is->audio_clock_serial = -1;
3113 is->audio_volume = startup_volume;
3114 is->muted = 0;
3115 is->av_sync_type = av_sync_type;
3116 is->read_tid = SDL_CreateThread(read_thread, "read_thread", is);
3117 if (!is->read_tid) {
3120 stream_close(is);
3123 return is;
3126 static void stream_cycle_channel(VideoState *is, int codec_type)
3128 AVFormatContext *ic = is->ic;
3133 int nb_streams = is->ic->nb_streams;
3136 start_index = is->last_video_stream;
3137 old_index = is->video_stream;
3139 start_index = is->last_audio_stream;
3140 old_index = is->audio_stream;
3142 start_index = is->last_subtitle_stream;
3143 old_index = is->subtitle_stream;
3147 if (codec_type != AVMEDIA_TYPE_VIDEO && is->video_stream != -1) {
3148 p = av_find_program_from_stream(ic, NULL, is->video_stream);
3166 is->last_subtitle_stream = -1;
3175 st = is->ic->streams[p ? p->stream_index[stream_index] : stream_index];
3200 stream_component_close(is, old_index);
3201 stream_component_open(is, stream_index);
3205 static void toggle_full_screen(VideoState *is)
3211 static void toggle_audio_display(VideoState *is)
3213 int next = is->show_mode;
3216 } while (next != is->show_mode && (next == SHOW_MODE_VIDEO && !is->video_st || next != SHOW_MODE_VIDEO && !is->audio_st));
3217 if (is->show_mode != next) {
3218 is->force_refresh = 1;
3219 is->show_mode = next;
3223 static void refresh_loop_wait_event(VideoState *is, SDL_Event *event) {
3234 if (is->show_mode != SHOW_MODE_NONE && (!is->paused || is->force_refresh))
3235 video_refresh(is, &remaining_time);
3240 static void seek_chapter(VideoState *is, int incr)
3242 int64_t pos = get_master_clock(is) * AV_TIME_BASE;
3245 if (!is->ic->nb_chapters)
3249 for (i = 0; i < is->ic->nb_chapters; i++) {
3250 AVChapter *ch = is->ic->chapters[i];
3259 if (i >= is->ic->nb_chapters)
3263 stream_seek(is, av_rescale_q(is->ic->chapters[i]->start, is->ic->chapters[i]->time_base,
3592 { "framedrop", OPT_BOOL | OPT_EXPERT, { &framedrop }, "drop frames when cpu is too slow", "" },
3649 "left/right seek backward/forward 10 seconds or to custom interval if -seek_interval is set\n"
3661 VideoState *is;
3697 * period size is NPOT due to ALSA resampling by forcing the buffer size. */
3747 is = stream_open(input_filename, file_iformat);
3748 if (!is) {
3753 event_loop(is);