Function seq_read_header

libavformat/tiertexseq.c:183–238

}

static int seq_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
    int i, rc;
    SeqDemuxContext *seq = s->priv_data;
    ByteIOContext *pb = s->pb;
    AVStream *st;

    /* init internal buffers */
    rc = seq_init_frame_buffers(seq, pb);
    if (rc)
        return rc;

    seq->current_frame_offs = 0;

    /* preload (no audio data, just buffer operations related data) */
    for (i = 1; i <= 100; i++) {
        rc = seq_parse_frame_data(seq, pb);
        if (rc)
            return rc;
    }

    seq->current_frame_pts = 0;

    seq->audio_buffer_full = 0;

    /* initialize the video decoder stream */
    st = av_new_stream(s, 0);
    if (!st)
        return AVERROR(ENOMEM);

    av_set_pts_info(st, 32, 1, SEQ_FRAME_RATE);
    seq->video_stream_index = st->index;
    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
    st->codec->codec_id = CODEC_ID_TIERTEXSEQVIDEO;
    st->codec->codec_tag = 0;  /* no fourcc */
    st->codec->width = SEQ_FRAME_W;
    st->codec->height = SEQ_FRAME_H;

    /* initialize the audio decoder stream */
    st = av_new_stream(s, 0);
    if (!st)
        return AVERROR(ENOMEM);

    av_set_pts_info(st, 32, 1, SEQ_SAMPLE_RATE);
    seq->audio_stream_index = st->index;
    st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
    st->codec->codec_id = CODEC_ID_PCM_S16BE;
    st->codec->codec_tag = 0;  /* no tag */
    st->codec->channels = 1;
    st->codec->sample_rate = SEQ_SAMPLE_RATE;
    st->codec->bits_per_coded_sample = 16;
    st->codec->bit_rate = st->codec->sample_rate * st->codec->bits_per_coded_sample * st->codec->channels;
    st->codec->block_align = st->codec->channels * st->codec->bits_per_coded_sample;

    return 0;
}

static int seq_read_packet(AVFormatContext *s, AVPacket *pkt)