Function ff_snow_common_init

libavcodec/snow.c:482–536

}

av_cold int ff_snow_common_init(AVCodecContext *avctx){
    static AVOnce init_static_once = AV_ONCE_INIT;
    SnowContext *s = avctx->priv_data;
    int width, height;
    int i;

    s->avctx= avctx;
    s->max_ref_frames=1; //just make sure it's not an invalid value in case of no initial keyframe
    s->spatial_decomposition_count = 1;

    ff_videodsp_init(&s->vdsp, 8);
    ff_dwt_init(&s->dwt);

    init_qpel(s);

#define mcfh(dx,dy)\
    s->hdsp.put_pixels_tab       [0][dy/4+dx/8]=\
    s->hdsp.put_no_rnd_pixels_tab[0][dy/4+dx/8]=\
        mc_block_hpel ## dx ## dy ## 16;\
    s->hdsp.put_pixels_tab       [1][dy/4+dx/8]=\
    s->hdsp.put_no_rnd_pixels_tab[1][dy/4+dx/8]=\
        mc_block_hpel ## dx ## dy ## 8;

    mcfh(0, 0)
    mcfh(8, 0)
    mcfh(0, 8)
    mcfh(8, 8)

//    dec += FFMAX(s->chroma_h_shift, s->chroma_v_shift);

    width= s->avctx->width;
    height= s->avctx->height;

    if (!FF_ALLOCZ_TYPED_ARRAY(s->spatial_idwt_buffer, width * height) ||
        !FF_ALLOCZ_TYPED_ARRAY(s->spatial_dwt_buffer,  width * height) ||  //FIXME this does not belong here
        !FF_ALLOCZ_TYPED_ARRAY(s->temp_dwt_buffer,     width)          ||
        !FF_ALLOCZ_TYPED_ARRAY(s->temp_idwt_buffer,    width)          ||
        !FF_ALLOCZ_TYPED_ARRAY(s->run_buffer, ((width + 1) >> 1) * ((height + 1) >> 1) + 1))
        return AVERROR(ENOMEM);

    for(i=0; i<MAX_REF_FRAMES; i++) {
        s->last_picture[i] = av_frame_alloc();
        if (!s->last_picture[i])
            return AVERROR(ENOMEM);
    }

    s->mconly_picture = av_frame_alloc();
    s->current_picture = av_frame_alloc();
    if (!s->mconly_picture || !s->current_picture)
        return AVERROR(ENOMEM);

    ff_thread_once(&init_static_once, snow_static_init);

    return 0;
}

int ff_snow_common_init_after_header(AVCodecContext *avctx) {
    SnowContext *s = avctx->priv_data;