dxva2 decode error

[fogin]

ERROR - A hardware frames or device context is required for hardware accelerated decoding.
ERROR - Failed setup for format dxva2_vld: hwaccel initialisation returned error.

when i use dxva2renderer, report this error

[cgutman]

I need your full Moonlight log file to investigate.

[fogin]

I used the dxva2.cpp file alone as part of my renderer, and the error disappeared after I added the following code to the end of the initialize function:
{
m_HwDeviceContext = av_hwdevice_ctx_alloc(AV_HWDEVICE_TYPE_DXVA2);
if (!m_HwDeviceContext) {
ALOGE("Failed to allocate D3D11VA device context");
return false;
}

    AVHWDeviceContext* deviceContext = (AVHWDeviceContext*)m_HwDeviceContext->data;
    AVDXVA2DeviceContext* dxva2DevCtx = (AVDXVA2DeviceContext*)deviceContext->hwctx;

    // AVHWDeviceContext takes ownership of these objects
    UINT reset_token = 0;
    HRESULT hr = DXVA2CreateDirect3DDeviceManager9(&reset_token, &dxva2DevCtx->devmgr);
    if (FAILED(hr))
        return false;

    hr = dxva2DevCtx->devmgr->ResetDevice(m_Device, reset_token);
    if (FAILED(hr))
        return false;

    int err = av_hwdevice_ctx_init(m_HwDeviceContext);
    if (err < 0) {
        ALOGE("Failed to initialize D3D11VA device context: %d",
            err);
        return false;
    }
}

{
    m_HwFramesContext = av_hwframe_ctx_alloc(m_HwDeviceContext);
    if (!m_HwFramesContext) {
        ALOGE("Failed to allocate D3D11VA frame context");
        return false;
    }

    AVHWFramesContext* framesContext = (AVHWFramesContext*)m_HwFramesContext->data;

    // We require NV12 or P010 textures for our shader
    framesContext->format = AV_PIX_FMT_DXVA2_VLD;
    framesContext->sw_format = AV_PIX_FMT_NV12;

    framesContext->width = FFALIGN(params->width, 128);
    framesContext->height = FFALIGN(params->height, 128);
    /* 1 base work surface */
    int num_surfaces = 20;

    /* add surfaces based on number of possible refs */
    framesContext->initial_pool_size = num_surfaces;
    int err = av_hwframe_ctx_init(m_HwFramesContext);
    if (err < 0) {
        ALOGE("Failed to initialize D3D11VA frame context: %d", err);
        return false;
    }
}