static int stream_component_open(PlayerState *is, int stream_index) { AVFormatContext *ic = is->ic; AVCodecContext *avctx; AVCodec *codec; SDL_AudioSpec wanted_spec, spec; AVDictionary *opts; AVDictionaryEntry *t = NULL; int ret = 0; if (stream_index < 0 || stream_index >= ic->nb_streams) return -1; avctx = ic->streams[stream_index]->codec; opts = filter_codec_opts(codec_opts, avctx->codec_id, ic, ic->streams[stream_index], NULL); codec = avcodec_find_decoder(avctx->codec_id); avctx->workaround_bugs = workaround_bugs; avctx->idct_algo = idct; avctx->skip_frame = skip_frame; avctx->skip_idct = skip_idct; avctx->skip_loop_filter = skip_loop_filter; avctx->error_concealment = error_concealment; if (fast) avctx->flags2 |= AV_CODEC_FLAG2_FAST; if (!av_dict_get(opts, "threads", NULL, 0)) av_dict_set(&opts, "threads", "auto", 0); if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) av_dict_set(&opts, "refcounted_frames", "1", 0); if (!codec || (ret = avcodec_open2(avctx, codec, &opts)) < 0) { goto fail; } if ((t = av_dict_get(opts, "", NULL, AV_DICT_IGNORE_SUFFIX))) { av_log(NULL, AV_LOG_ERROR, "Option %s not found.\n", t->key); ret = AVERROR_OPTION_NOT_FOUND; goto fail; } /* prepare audio output */ if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) { is->sdl_sample_rate = avctx->sample_rate; if (!avctx->channel_layout) avctx->channel_layout = av_get_default_channel_layout(avctx->channels); if (!avctx->channel_layout) { fprintf(stderr, "unable to guess channel layout\n"); ret = AVERROR_INVALIDDATA; goto fail; } if (avctx->channels == 1) is->sdl_channel_layout = AV_CH_LAYOUT_MONO; else is->sdl_channel_layout = AV_CH_LAYOUT_STEREO; is->sdl_channels = av_get_channel_layout_nb_channels(is->sdl_channel_layout); wanted_spec.format = AUDIO_S16SYS; wanted_spec.freq = is->sdl_sample_rate; wanted_spec.channels = is->sdl_channels; wanted_spec.silence = 0; wanted_spec.samples = SDL_AUDIO_BUFFER_SIZE; wanted_spec.callback = sdl_audio_callback; wanted_spec.userdata = is; if (SDL_OpenAudio(&wanted_spec, &spec) < 0) { fprintf(stderr, "SDL_OpenAudio: %s\n", SDL_GetError()); ret = AVERROR_UNKNOWN; goto fail; } is->audio_hw_buf_size = spec.size; is->sdl_sample_fmt = AV_SAMPLE_FMT_S16; is->resample_sample_fmt = is->sdl_sample_fmt; is->resample_channel_layout = avctx->channel_layout; is->resample_sample_rate = avctx->sample_rate; } ic->streams[stream_index]->discard = AVDISCARD_DEFAULT; switch (avctx->codec_type) { case AVMEDIA_TYPE_AUDIO: is->audio_stream = stream_index; is->audio_st = ic->streams[stream_index]; is->audio_buf_size = 0; is->audio_buf_index = 0; /* init averaging filter */ is->audio_diff_avg_coef = exp(log(0.01) / AUDIO_DIFF_AVG_NB); is->audio_diff_avg_count = 0; /* since we do not have a precise anough audio fifo fullness, we correct audio sync only if larger than this threshold */ is->audio_diff_threshold = 2.0 * SDL_AUDIO_BUFFER_SIZE / avctx->sample_rate; memset(&is->audio_pkt, 0, sizeof(is->audio_pkt)); packet_queue_init(&is->audioq); SDL_PauseAudio(0); break; case AVMEDIA_TYPE_VIDEO: is->video_stream = stream_index; is->video_st = ic->streams[stream_index]; packet_queue_init(&is->videoq); is->video_tid = SDL_CreateThread(video_thread, is); break; case AVMEDIA_TYPE_SUBTITLE: is->subtitle_stream = stream_index; is->subtitle_st = ic->streams[stream_index]; packet_queue_init(&is->subtitleq); is->subtitle_tid = SDL_CreateThread(subtitle_thread, is); break; default: break; } fail: av_dict_free(&opts); return ret; }