Function encode_init

libavcodec/snowenc.c:164–308

}

static av_cold int encode_init(AVCodecContext *avctx)
{
    SnowEncContext *const enc = avctx->priv_data;
    SnowContext *const s = &enc->com;
    MPVEncContext *const mpv = &enc->m.s;
    int plane_index, ret;
    int i;

    if (enc->pred == DWT_97
       && (avctx->flags & AV_CODEC_FLAG_QSCALE)
       && avctx->global_quality == 0){
        av_log(avctx, AV_LOG_ERROR, "The 9/7 wavelet is incompatible with lossless mode.\n");
        return AVERROR(EINVAL);
    }

    s->spatial_decomposition_type = enc->pred; //FIXME add decorrelator type r transform_type

    s->mv_scale       = (avctx->flags & AV_CODEC_FLAG_QPEL) ? 2 : 4;
    s->block_max_depth= (avctx->flags & AV_CODEC_FLAG_4MV ) ? 1 : 0;

    for(plane_index=0; plane_index<3; plane_index++){
        s->plane[plane_index].diag_mc= 1;
        s->plane[plane_index].htaps= 6;
        s->plane[plane_index].hcoeff[0]=  40;
        s->plane[plane_index].hcoeff[1]= -10;
        s->plane[plane_index].hcoeff[2]=   2;
        s->plane[plane_index].fast_mc= 1;
    }

    // Must be before ff_snow_common_init()
    ff_hpeldsp_init(&s->hdsp, avctx->flags);
    if ((ret = ff_snow_common_init(avctx)) < 0) {
        return ret;
    }

#define mcf(dx,dy)\
    enc->qdsp.put_qpel_pixels_tab       [0][dy+dx/4]=\
    enc->qdsp.put_no_rnd_qpel_pixels_tab[0][dy+dx/4]=\
        s->h264qpel.put_h264_qpel_pixels_tab[0][dy+dx/4];\
    enc->qdsp.put_qpel_pixels_tab       [1][dy+dx/4]=\
    enc->qdsp.put_no_rnd_qpel_pixels_tab[1][dy+dx/4]=\
        s->h264qpel.put_h264_qpel_pixels_tab[1][dy+dx/4];

    mcf( 0, 0)
    mcf( 4, 0)
    mcf( 8, 0)
    mcf(12, 0)
    mcf( 0, 4)
    mcf( 4, 4)
    mcf( 8, 4)
    mcf(12, 4)
    mcf( 0, 8)
    mcf( 4, 8)
    mcf( 8, 8)
    mcf(12, 8)
    mcf( 0,12)
    mcf( 4,12)
    mcf( 8,12)