Function ir2_decode_frame

libavcodec/indeo2.c:138–192

}

static int ir2_decode_frame(AVCodecContext *avctx,
                        void *data, int *data_size,
                        AVPacket *avpkt)
{
    const uint8_t *buf = avpkt->data;
    int buf_size = avpkt->size;
    Ir2Context * const s = avctx->priv_data;
    AVFrame *picture = data;
    AVFrame * const p= (AVFrame*)&s->picture;
    int start;

    if(p->data[0])
        avctx->release_buffer(avctx, p);

    p->reference = 1;
    p->buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
    if (avctx->reget_buffer(avctx, p)) {
        av_log(s->avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
        return -1;
    }

    s->decode_delta = buf[18];

    /* decide whether frame uses deltas or not */
#ifndef ALT_BITSTREAM_READER_LE
    for (i = 0; i < buf_size; i++)
        buf[i] = av_reverse[buf[i]];
#endif
    start = 48; /* hardcoded for now */

    init_get_bits(&s->gb, buf + start, buf_size - start);

    if (s->decode_delta) { /* intraframe */
        ir2_decode_plane(s, avctx->width, avctx->height,
                         s->picture.data[0], s->picture.linesize[0], ir2_luma_table);
        /* swapped U and V */
        ir2_decode_plane(s, avctx->width >> 2, avctx->height >> 2,
                         s->picture.data[2], s->picture.linesize[2], ir2_luma_table);
        ir2_decode_plane(s, avctx->width >> 2, avctx->height >> 2,
                         s->picture.data[1], s->picture.linesize[1], ir2_luma_table);
    } else { /* interframe */
        ir2_decode_plane_inter(s, avctx->width, avctx->height,
                         s->picture.data[0], s->picture.linesize[0], ir2_luma_table);
        /* swapped U and V */
        ir2_decode_plane_inter(s, avctx->width >> 2, avctx->height >> 2,
                         s->picture.data[2], s->picture.linesize[2], ir2_luma_table);
        ir2_decode_plane_inter(s, avctx->width >> 2, avctx->height >> 2,
                         s->picture.data[1], s->picture.linesize[1], ir2_luma_table);
    }

    *picture= *(AVFrame*)&s->picture;
    *data_size = sizeof(AVPicture);

    return buf_size;
}

static av_cold int ir2_decode_init(AVCodecContext *avctx){
    Ir2Context * const ic = avctx->priv_data;