Function hwframe_pool_prealloc

libavutil/hwcontext.c:309–335

}

static int hwframe_pool_prealloc(AVBufferRef *ref)
{
    AVHWFramesContext *ctx = (AVHWFramesContext*)ref->data;
    AVFrame **frames;
    int i, ret = 0;

    frames = av_calloc(ctx->initial_pool_size, sizeof(*frames));
    if (!frames)
        return AVERROR(ENOMEM);

    for (i = 0; i < ctx->initial_pool_size; i++) {
        frames[i] = av_frame_alloc();
        if (!frames[i])
            goto fail;

        ret = av_hwframe_get_buffer(ref, frames[i], 0);
        if (ret < 0)
            goto fail;
    }

fail:
    for (i = 0; i < ctx->initial_pool_size; i++)
        av_frame_free(&frames[i]);
    av_freep(&frames);

    return ret;
}

int av_hwframe_ctx_init(AVBufferRef *ref)
{