Function ff_tak_decode_frame_header

libavcodec/tak.c:147–184

}

int ff_tak_decode_frame_header(void *logctx, GetBitContext *gb,
                               TAKStreamInfo *ti, int log_level_offset)
{
    if (get_bits(gb, TAK_FRAME_HEADER_SYNC_ID_BITS) != TAK_FRAME_HEADER_SYNC_ID) {
        av_log(logctx, AV_LOG_ERROR + log_level_offset, "missing sync id\n");
        return AVERROR_INVALIDDATA;
    }

    ti->flags     = get_bits(gb, TAK_FRAME_HEADER_FLAGS_BITS);
    ti->frame_num = get_bits(gb, TAK_FRAME_HEADER_NO_BITS);

    if (ti->flags & TAK_FRAME_FLAG_IS_LAST) {
        ti->last_frame_samples = get_bits(gb, TAK_FRAME_HEADER_SAMPLE_COUNT_BITS) + 1;
        skip_bits(gb, 2);
    } else {
        ti->last_frame_samples = 0;
    }

    if (ti->flags & TAK_FRAME_FLAG_HAS_INFO) {
        int ret = tak_parse_streaminfo(ti, gb);
        if (ret < 0)
            return ret;

        if (get_bits(gb, 6))
            skip_bits(gb, 25);
        align_get_bits(gb);
    }

    if (ti->flags & TAK_FRAME_FLAG_HAS_METADATA)
        return AVERROR_INVALIDDATA;

    if (get_bits_left(gb) < 24)
        return AVERROR_INVALIDDATA;

    skip_bits(gb, 24);

    return 0;
}