Function alloc_picture

libavcodec/h264_slice.c:188–273

}

static int alloc_picture(H264Context *h, H264Picture *pic)
{
    int i, ret = 0;

    av_assert0(!pic->f->data[0]);

    if (h->sei.common.lcevc.info) {
        HEVCSEILCEVC *lcevc = &h->sei.common.lcevc;
        ret = ff_frame_new_side_data_from_buf(h->avctx, pic->f, AV_FRAME_DATA_LCEVC, &lcevc->info);
        if (ret < 0)
            return ret;
    }

    pic->tf.f = pic->f;
    ret = ff_thread_get_ext_buffer(h->avctx, &pic->tf,
                                   pic->reference ? AV_GET_BUFFER_FLAG_REF : 0);
    if (ret < 0)
        goto fail;

    if (pic->needs_fg) {
        pic->f_grain->format = pic->f->format;
        pic->f_grain->width = pic->f->width;
        pic->f_grain->height = pic->f->height;
        ret = ff_thread_get_buffer(h->avctx, pic->f_grain, 0);
        if (ret < 0)
            goto fail;
    }

    ret = ff_hwaccel_frame_priv_alloc(h->avctx, &pic->hwaccel_picture_private);
    if (ret < 0)
        goto fail;

    if (h->decode_error_flags_pool) {
        pic->decode_error_flags = av_refstruct_pool_get(h->decode_error_flags_pool);
        if (!pic->decode_error_flags)
            goto fail;
        atomic_init(pic->decode_error_flags, 0);
    }

    if (CONFIG_GRAY && !h->avctx->hwaccel && h->flags & AV_CODEC_FLAG_GRAY && pic->f->data[2]) {
        int h_chroma_shift, v_chroma_shift;
        av_pix_fmt_get_chroma_sub_sample(pic->f->format,
                                         &h_chroma_shift, &v_chroma_shift);

        for(i=0; i<AV_CEIL_RSHIFT(pic->f->height, v_chroma_shift); i++) {
            memset(pic->f->data[1] + pic->f->linesize[1]*i,
                   0x80, AV_CEIL_RSHIFT(pic->f->width, h_chroma_shift));
            memset(pic->f->data[2] + pic->f->linesize[2]*i,
                   0x80, AV_CEIL_RSHIFT(pic->f->width, h_chroma_shift));
        }
    }

    if (!h->qscale_table_pool) {
        ret = init_table_pools(h);
        if (ret < 0)
            goto fail;
    }