static int ea_read_header(AVFormatContext *s) { EaDemuxContext *ea = s->priv_data; AVStream *st; if (process_ea_header(s)<=0) return AVERROR(EIO); if (init_video_stream(s, &ea->video) || init_video_stream(s, &ea->alpha)) return AVERROR(ENOMEM); if (ea->audio_codec) { if (ea->num_channels <= 0 || ea->num_channels > 2) { av_log(s, AV_LOG_WARNING, "Unsupported number of channels: %d\n", ea->num_channels); ea->audio_codec = 0; return 1; } if (ea->sample_rate <= 0) { av_log(s, AV_LOG_ERROR, "Unsupported sample rate: %d\n", ea->sample_rate); ea->audio_codec = 0; return 1; } if (ea->bytes <= 0) { av_log(s, AV_LOG_ERROR, "Invalid number of bytes per sample: %d\n", ea->bytes); ea->audio_codec = AV_CODEC_ID_NONE; return 1; } /* initialize the audio decoder stream */ st = avformat_new_stream(s, NULL); if (!st) return AVERROR(ENOMEM); avpriv_set_pts_info(st, 33, 1, ea->sample_rate); st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; st->codecpar->codec_id = ea->audio_codec; st->codecpar->codec_tag = 0; /* no tag */ st->codecpar->channels = ea->num_channels; st->codecpar->sample_rate = ea->sample_rate; st->codecpar->bits_per_coded_sample = ea->bytes * 8; st->codecpar->bit_rate = (int64_t)st->codecpar->channels * st->codecpar->sample_rate * st->codecpar->bits_per_coded_sample / 4; st->codecpar->block_align = st->codecpar->channels * st->codecpar->bits_per_coded_sample; ea->audio_stream_index = st->index; st->start_time = 0; } return 1; }