Function seq_parse_frame_data

libavformat/tiertexseq.c:124–181

}

static int seq_parse_frame_data(SeqDemuxContext *seq, ByteIOContext *pb)
{
    unsigned int offset_table[4], buffer_num[4];
    TiertexSeqFrameBuffer *seq_buffer;
    int i, e, err;

    seq->current_frame_offs += SEQ_FRAME_SIZE;
    url_fseek(pb, seq->current_frame_offs, SEEK_SET);

    /* sound data */
    seq->current_audio_data_offs = get_le16(pb);
    if (seq->current_audio_data_offs) {
        seq->current_audio_data_size = SEQ_AUDIO_BUFFER_SIZE * 2;
    } else {
        seq->current_audio_data_size = 0;
    }

    /* palette data */
    seq->current_pal_data_offs = get_le16(pb);
    if (seq->current_pal_data_offs) {
        seq->current_pal_data_size = 768;
    } else {
        seq->current_pal_data_size = 0;
    }

    /* video data */
    for (i = 0; i < 4; i++)
        buffer_num[i] = get_byte(pb);

    for (i = 0; i < 4; i++)
        offset_table[i] = get_le16(pb);

    for (i = 0; i < 3; i++) {
        if (offset_table[i]) {
            for (e = i + 1; e < 3 && offset_table[e] == 0; e++);
            err = seq_fill_buffer(seq, pb, buffer_num[1 + i],
              offset_table[i],
              offset_table[e] - offset_table[i]);
            if (err)
                return err;
        }
    }

    if (buffer_num[0] != 255) {
        if (buffer_num[0] >= SEQ_NUM_FRAME_BUFFERS)
            return AVERROR_INVALIDDATA;

        seq_buffer = &seq->frame_buffers[buffer_num[0]];
        seq->current_video_data_size = seq_buffer->fill_size;
        seq->current_video_data_ptr  = seq_buffer->data;
        seq_buffer->fill_size = 0;
    } else {
        seq->current_video_data_size = 0;
        seq->current_video_data_ptr  = 0;
    }

    return 0;
}