Function get_pixel_format

libavcodec/vp8.c:179–1171

}

static enum AVPixelFormat get_pixel_format(VP8Context *s)
{
    enum AVPixelFormat pix_fmts[] = {
#if CONFIG_VP8_VAAPI_HWACCEL
        AV_PIX_FMT_VAAPI,
#endif
#if CONFIG_VP8_NVDEC_HWACCEL
        AV_PIX_FMT_CUDA,
#endif
        AV_PIX_FMT_YUV420P,
        AV_PIX_FMT_NONE,
    };

    return ff_get_format(s->avctx, pix_fmts);
}

static av_always_inline
int update_dimensions(VP8Context *s, int width, int height, int is_vp7)
{
    AVCodecContext *avctx = s->avctx;
    int i, ret, dim_reset = 0;

    if (width  != s->avctx->width || ((width+15)/16 != s->mb_width || (height+15)/16 != s->mb_height) && s->macroblocks_base ||
        height != s->avctx->height) {
        vp8_decode_flush_impl(s->avctx, 1);

        ret = ff_set_dimensions(s->avctx, width, height);
        if (ret < 0)
            return ret;

        dim_reset = (s->macroblocks_base != NULL);
    }

    if ((s->pix_fmt == AV_PIX_FMT_NONE || dim_reset) &&
         !s->actually_webp && !is_vp7) {
        s->pix_fmt = get_pixel_format(s);
        if (s->pix_fmt < 0)
            return AVERROR(EINVAL);
        avctx->pix_fmt = s->pix_fmt;
    }

    s->mb_width  = (s->avctx->coded_width  + 15) / 16;
    s->mb_height = (s->avctx->coded_height + 15) / 16;

    s->mb_layout = is_vp7 || avctx->active_thread_type == FF_THREAD_SLICE &&
                   avctx->thread_count > 1;
    if (!s->mb_layout) { // Frame threading and one thread
        s->macroblocks_base       = av_mallocz((s->mb_width + s->mb_height * 2 + 1) *
                                               sizeof(*s->macroblocks));
        s->intra4x4_pred_mode_top = av_mallocz(s->mb_width * 4);
    } else // Sliced threading
        s->macroblocks_base = av_mallocz((s->mb_width + 2) * (s->mb_height + 2) *
                                         sizeof(*s->macroblocks));
    s->top_nnz     = av_mallocz(s->mb_width * sizeof(*s->top_nnz));
    s->top_border  = av_mallocz((s->mb_width + 1) * sizeof(*s->top_border));
    s->thread_data = av_mallocz(MAX_THREADS * sizeof(VP8ThreadData));

    if (!s->macroblocks_base || !s->top_nnz || !s->top_border ||