Function transfer_data_alloc

libavutil/hwcontext.c:398–446

}

static int transfer_data_alloc(AVFrame *dst, const AVFrame *src, int flags)
{
    AVHWFramesContext *ctx;
    AVFrame *frame_tmp;
    int ret = 0;

    if (!src->hw_frames_ctx)
        return AVERROR(EINVAL);
    ctx = (AVHWFramesContext*)src->hw_frames_ctx->data;

    frame_tmp = av_frame_alloc();
    if (!frame_tmp)
        return AVERROR(ENOMEM);

    /* if the format is set, use that
     * otherwise pick the first supported one */
    if (dst->format >= 0) {
        frame_tmp->format = dst->format;
    } else {
        enum AVPixelFormat *formats;

        ret = av_hwframe_transfer_get_formats(src->hw_frames_ctx,
                                              AV_HWFRAME_TRANSFER_DIRECTION_FROM,
                                              &formats, 0);
        if (ret < 0)
            goto fail;
        frame_tmp->format = formats[0];
        av_freep(&formats);
    }
    frame_tmp->width  = ctx->width;
    frame_tmp->height = ctx->height;

    ret = av_frame_get_buffer(frame_tmp, 0);
    if (ret < 0)
        goto fail;

    ret = av_hwframe_transfer_data(frame_tmp, src, flags);
    if (ret < 0)
        goto fail;

    frame_tmp->width  = src->width;
    frame_tmp->height = src->height;

    av_frame_move_ref(dst, frame_tmp);

fail:
    av_frame_free(&frame_tmp);
    return ret;
}

int av_hwframe_transfer_data(AVFrame *dst, const AVFrame *src, int flags)
{