Function d3d12va_get_valid_command_allocator

libavcodec/d3d12va_encode.c:94–117

} CommandAllocator;

static int d3d12va_get_valid_command_allocator(AVCodecContext *avctx, ID3D12CommandAllocator **ppAllocator)
{
    HRESULT hr;
    D3D12VAEncodeContext *ctx = avctx->priv_data;
    CommandAllocator allocator;

    if (av_fifo_peek(ctx->allocator_queue, &allocator, 1, 0) >= 0) {
        uint64_t completion = ID3D12Fence_GetCompletedValue(ctx->sync_ctx.fence);
        if (completion >= allocator.fence_value) {
            *ppAllocator = allocator.command_allocator;
            av_fifo_read(ctx->allocator_queue, &allocator, 1);
            return 0;
        }
    }

    hr = ID3D12Device_CreateCommandAllocator(ctx->hwctx->device, D3D12_COMMAND_LIST_TYPE_VIDEO_ENCODE,
                                             &IID_ID3D12CommandAllocator, (void **)ppAllocator);
    if (FAILED(hr)) {
        av_log(avctx, AV_LOG_ERROR, "Failed to create a new command allocator!\n");
        return AVERROR(EINVAL);
    }

    return 0;
}

static int d3d12va_discard_command_allocator(AVCodecContext *avctx, ID3D12CommandAllocator *pAllocator, uint64_t fence_value)
{