Function cook_decode_frame

libavcodec/cook.c:996–1038

 */

static int cook_decode_frame(AVCodecContext *avctx,
            void *data, int *data_size,
            AVPacket *avpkt) {
    const uint8_t *buf = avpkt->data;
    int buf_size = avpkt->size;
    COOKContext *q = avctx->priv_data;
    int i;
    int offset = 0;
    int chidx = 0;

    if (buf_size < avctx->block_align)
        return buf_size;

    /* estimate subpacket sizes */
    q->subpacket[0].size = avctx->block_align;

    for(i=1;i<q->num_subpackets;i++){
        q->subpacket[i].size = 2 * buf[avctx->block_align - q->num_subpackets + i];
        q->subpacket[0].size -= q->subpacket[i].size + 1;
        if (q->subpacket[0].size < 0) {
            av_log(avctx,AV_LOG_DEBUG,"frame subpacket size total > avctx->block_align!\n");
            return -1;
        }
    }

    /* decode supbackets */
    *data_size = 0;
    for(i=0;i<q->num_subpackets;i++){
        q->subpacket[i].bits_per_subpacket = (q->subpacket[i].size*8)>>q->subpacket[i].bits_per_subpdiv;
        q->subpacket[i].ch_idx = chidx;
        av_log(avctx,AV_LOG_DEBUG,"subpacket[%i] size %i js %i %i block_align %i\n",i,q->subpacket[i].size,q->subpacket[i].joint_stereo,offset,avctx->block_align);
        decode_subpacket(q, &q->subpacket[i], buf + offset, (int16_t*)data);
        offset += q->subpacket[i].size;
        chidx += q->subpacket[i].num_channels;
        av_log(avctx,AV_LOG_DEBUG,"subpacket[%i] %i %i\n",i,q->subpacket[i].size * 8,get_bits_count(&q->gb));
    }
    *data_size = sizeof(int16_t) * q->nb_channels * q->samples_per_channel;

    /* Discard the first two frames: no valid audio. */
    if (avctx->frame_number < 2) *data_size = 0;

    return avctx->block_align;
}

#ifdef COOKDEBUG
static void dump_cook_context(COOKContext *q)