[FFmpeg-devel] [PATCH v2 4/4] libavutil/qsv: enabling d3d11va support

Steve Lhomme robux4 at ycbcr.xyz
Tue Apr 21 13:25:34 EEST 2020


On 2020-04-15 15:07, artem.galin at gmail.com wrote:
> From: Artem Galin <artem.galin at intel.com>
> 
> Makes selection of d3d11va device type by default and over DirectX 9,
> which is still supported but requires explicit selection.
> This enables usage of non-powered/headless GPU, better HDR support.
> Pool of resources is allocated as one texture with array of slices.

I'm all for it ;)

> Added d3d11va device selection by vendor id.
> Example: --init_hw_device d3d11va:,vendor=0x8086
> 
> DirectX 9 usage.
> Example: --init_hw_device qsv:hw,child_device_type=dxva2

Same remark as before on the possible uninitialized handle_type.

> Signed-off-by: Artem Galin <artem.galin at intel.com>
> ---
>   libavutil/hwcontext_d3d11va.c |  82 +++++++-
>   libavutil/hwcontext_d3d11va.h |   8 +
>   libavutil/hwcontext_qsv.c     | 339 +++++++++++++++++++++++++++++-----
>   3 files changed, 371 insertions(+), 58 deletions(-)
> 
> diff --git a/libavutil/hwcontext_d3d11va.c b/libavutil/hwcontext_d3d11va.c
> index c8ae58f908..9d7615eb55 100644
> --- a/libavutil/hwcontext_d3d11va.c
> +++ b/libavutil/hwcontext_d3d11va.c
> @@ -72,7 +72,7 @@ static av_cold void load_functions(void)
>   }
>   
>   typedef struct D3D11VAFramesContext {
> -    int nb_surfaces_used;
> +    int nb_surfaces;

Probably better as a size_t

>       DXGI_FORMAT format;
>   
> @@ -112,6 +112,8 @@ static void d3d11va_frames_uninit(AVHWFramesContext *ctx)
>       if (s->staging_texture)
>           ID3D11Texture2D_Release(s->staging_texture);
>       s->staging_texture = NULL;
> +
> +    av_freep(&frames_hwctx->texture_infos);
>   }
>   
>   static int d3d11va_frames_get_constraints(AVHWDeviceContext *ctx,
> @@ -152,8 +154,9 @@ static void free_texture(void *opaque, uint8_t *data)
>       av_free(data);
>   }
>   
> -static AVBufferRef *wrap_texture_buf(ID3D11Texture2D *tex, int index)
> +static AVBufferRef *wrap_texture_buf(AVHWFramesContext *ctx, ID3D11Texture2D *tex, int index)
>   {
> +    AVD3D11VAFramesContext *frames_hwctx = ctx->hwctx;
>       AVBufferRef *buf;
>       AVD3D11FrameDescriptor *desc = av_mallocz(sizeof(*desc));
>       if (!desc) {
> @@ -161,6 +164,10 @@ static AVBufferRef *wrap_texture_buf(ID3D11Texture2D *tex, int index)
>           return NULL;
>       }
>   
> +    frames_hwctx->texture_infos[frames_hwctx->nb_surfaces_used].texture = tex;
> +    frames_hwctx->texture_infos[frames_hwctx->nb_surfaces_used].index = index;
> +    frames_hwctx->nb_surfaces_used++;
> +
>       desc->texture = tex;
>       desc->index   = index;
>   
> @@ -199,13 +206,12 @@ static AVBufferRef *d3d11va_alloc_single(AVHWFramesContext *ctx)
>           return NULL;
>       }
>   
> -    return wrap_texture_buf(tex, 0);
> +    return wrap_texture_buf(ctx, tex, 0);
>   }
>   
>   static AVBufferRef *d3d11va_pool_alloc(void *opaque, int size)
>   {
>       AVHWFramesContext        *ctx = (AVHWFramesContext*)opaque;
> -    D3D11VAFramesContext       *s = ctx->internal->priv;
>       AVD3D11VAFramesContext *hwctx = ctx->hwctx;
>       D3D11_TEXTURE2D_DESC  texDesc;
>   
> @@ -214,13 +220,13 @@ static AVBufferRef *d3d11va_pool_alloc(void *opaque, int size)
>   
>       ID3D11Texture2D_GetDesc(hwctx->texture, &texDesc);
>   
> -    if (s->nb_surfaces_used >= texDesc.ArraySize) {
> +    if (hwctx->nb_surfaces_used >= texDesc.ArraySize) {
>           av_log(ctx, AV_LOG_ERROR, "Static surface pool size exceeded.\n");
>           return NULL;
>       }
>   
>       ID3D11Texture2D_AddRef(hwctx->texture);
> -    return wrap_texture_buf(hwctx->texture, s->nb_surfaces_used++);
> +    return wrap_texture_buf(ctx, hwctx->texture, hwctx->nb_surfaces_used);
>   }
>   
>   static int d3d11va_frames_init(AVHWFramesContext *ctx)
> @@ -267,7 +273,7 @@ static int d3d11va_frames_init(AVHWFramesContext *ctx)
>               av_log(ctx, AV_LOG_ERROR, "User-provided texture has mismatching parameters\n");
>               return AVERROR(EINVAL);
>           }
> -    } else if (texDesc.ArraySize > 0) {
> +    } else if (!(texDesc.BindFlags & D3D11_BIND_RENDER_TARGET) && texDesc.ArraySize > 0) {
>           hr = ID3D11Device_CreateTexture2D(device_hwctx->device, &texDesc, NULL, &hwctx->texture);
>           if (FAILED(hr)) {
>               av_log(ctx, AV_LOG_ERROR, "Could not create the texture (%lx)\n", (long)hr);
> @@ -275,6 +281,12 @@ static int d3d11va_frames_init(AVHWFramesContext *ctx)
>           }
>       }
>   
> +    hwctx->texture_infos = av_mallocz_array(ctx->initial_pool_size, sizeof(*hwctx->texture_infos));
> +    if (!hwctx->texture_infos)
> +        return AVERROR(ENOMEM);
> +
> +    s->nb_surfaces = ctx->initial_pool_size;
> +
>       ctx->internal->pool_internal = av_buffer_pool_init2(sizeof(AVD3D11FrameDescriptor),
>                                                           ctx, d3d11va_pool_alloc, NULL);
>       if (!ctx->internal->pool_internal)
> @@ -511,15 +523,56 @@ static void d3d11va_device_uninit(AVHWDeviceContext *hwdev)
>       }
>   }
>   
> +static int d3d11va_device_find_adapter_by_vendor_id(AVHWDeviceContext *ctx, UINT creationFlags, char *vendor)
> +{
> +    HRESULT hr;
> +    IDXGIAdapter *adapter = NULL;
> +    int adapter_id = 0;
> +    IDXGIFactory2 *factory;
> +    long int vendor_id = strtol(vendor, NULL, 0);
> +    hr = mCreateDXGIFactory(&IID_IDXGIFactory2, (void **)&factory);
> +    while (IDXGIFactory2_EnumAdapters(factory, adapter_id++, &adapter) != DXGI_ERROR_NOT_FOUND) {
> +        ID3D11Device* device = NULL;
> +        DXGI_ADAPTER_DESC adapter_desc;
> +
> +        hr = mD3D11CreateDevice(adapter, D3D_DRIVER_TYPE_UNKNOWN, NULL, creationFlags, NULL, 0, D3D11_SDK_VERSION, &device, NULL, NULL);
> +        if (FAILED(hr)) {
> +            av_log(ctx, AV_LOG_ERROR, "D3D11CreateDevice returned error\n");
> +            continue;
> +        }
> +
> +        hr = IDXGIAdapter2_GetDesc(adapter, &adapter_desc);
> +        if (FAILED(hr)) {
> +            av_log(ctx, AV_LOG_ERROR, "IDXGIAdapter2_GetDesc returned error\n");
> +            continue;
> +        }
> +
> +        if (device)
> +            ID3D11Device_Release(device);
> +
> +        if (adapter)
> +            IDXGIAdapter_Release(adapter);
> +
> +        if (adapter_desc.VendorId == vendor_id) {
> +            IDXGIFactory2_Release(factory);
> +            return adapter_id - 1;
> +        }
> +    }
> +    IDXGIFactory2_Release(factory);
> +    return -1;
> +}
> +
>   static int d3d11va_device_create(AVHWDeviceContext *ctx, const char *device,
>                                    AVDictionary *opts, int flags)
>   {
>       AVD3D11VADeviceContext *device_hwctx = ctx->hwctx;
>   
>       HRESULT hr;
> +    AVDictionaryEntry *e;
>       IDXGIAdapter           *pAdapter = NULL;
>       ID3D10Multithread      *pMultithread;
>       UINT creationFlags = D3D11_CREATE_DEVICE_VIDEO_SUPPORT;
> +    int adapter = -1;
>       int is_debug       = !!av_dict_get(opts, "debug", NULL, 0);
>       int ret;
>   
> @@ -539,11 +592,23 @@ static int d3d11va_device_create(AVHWDeviceContext *ctx, const char *device,
>           return AVERROR_UNKNOWN;
>       }
>   
> +    e = av_dict_get(opts, "vendor", NULL, 0);
> +    if (e) {

Not sure where "vendor" is defined but maybe it's possible to read it as 
an integer directly ? The you can pass the integer directly to 
d3d11va_device_find_adapter_by_vendor_id().

> +        adapter = d3d11va_device_find_adapter_by_vendor_id(ctx, creationFlags, e ? e->value : NULL);
> +        if (adapter < 0) {
> +            av_log(ctx, AV_LOG_ERROR, "Failed to find d3d11va adapter by vendor id %s\n", e ? e->value : NULL);
> +            return AVERROR_UNKNOWN;
> +        }
> +    }
> +
>       if (device) {
> +        adapter = atoi(device);
> +    }
> +
> +    if (adapter >= 0) {
>           IDXGIFactory2 *pDXGIFactory;
>           hr = mCreateDXGIFactory(&IID_IDXGIFactory2, (void **)&pDXGIFactory);
>           if (SUCCEEDED(hr)) {
> -            int adapter = atoi(device);
>               if (FAILED(IDXGIFactory2_EnumAdapters(pDXGIFactory, adapter, &pAdapter)))
>                   pAdapter = NULL;
>               IDXGIFactory2_Release(pDXGIFactory);
> @@ -568,6 +633,7 @@ static int d3d11va_device_create(AVHWDeviceContext *ctx, const char *device,
>           return AVERROR_UNKNOWN;
>       }
>   
> +    av_log(ctx, AV_LOG_VERBOSE, "Using D3D11 device.\n");
>       hr = ID3D11Device_QueryInterface(device_hwctx->device, &IID_ID3D10Multithread, (void **)&pMultithread);
>       if (SUCCEEDED(hr)) {
>           ID3D10Multithread_SetMultithreadProtected(pMultithread, TRUE);
> diff --git a/libavutil/hwcontext_d3d11va.h b/libavutil/hwcontext_d3d11va.h
> index 9f91e9b1b6..4312fe0b62 100644
> --- a/libavutil/hwcontext_d3d11va.h
> +++ b/libavutil/hwcontext_d3d11va.h
> @@ -39,6 +39,11 @@
>   #include <d3d11.h>
>   #include <stdint.h>
>   
> +typedef struct D3D11TextureInfo {
> +    ID3D11Texture2D *texture;
> +    int index;

Probably better as a size_t

> +} D3D11TextureInfo;
> +
>   /**
>    * This struct is allocated as AVHWDeviceContext.hwctx
>    */
> @@ -164,6 +169,9 @@ typedef struct AVD3D11VAFramesContext {
>        * This field is ignored/invalid if a user-allocated texture is provided.
>        */
>       UINT MiscFlags;
> +
> +    D3D11TextureInfo *texture_infos;
> +    int nb_surfaces_used;
>   } AVD3D11VAFramesContext;
>   
>   #endif /* AVUTIL_HWCONTEXT_D3D11VA_H */
> diff --git a/libavutil/hwcontext_qsv.c b/libavutil/hwcontext_qsv.c
> index b1b67400de..1bc02c41eb 100644
> --- a/libavutil/hwcontext_qsv.c
> +++ b/libavutil/hwcontext_qsv.c
> @@ -27,9 +27,13 @@
>   #include <pthread.h>
>   #endif
>   
> +#define COBJMACROS
>   #if CONFIG_VAAPI
>   #include "hwcontext_vaapi.h"
>   #endif
> +#if CONFIG_D3D11VA
> +#include "hwcontext_d3d11va.h"
> +#endif
>   #if CONFIG_DXVA2
>   #include "hwcontext_dxva2.h"
>   #endif
> @@ -44,6 +48,8 @@
>   #include "pixdesc.h"
>   #include "time.h"
>   
> +#define MFX_IMPL_VIA_MASK(impl) (0x0f00 & (impl))
> +
>   typedef struct QSVDevicePriv {
>       AVBufferRef *child_device_ctx;
>   } QSVDevicePriv;
> @@ -70,6 +76,7 @@ typedef struct QSVFramesContext {
>   
>       AVBufferRef *child_frames_ref;
>       mfxFrameSurface1 *surfaces_internal;
> +    mfxHDLPair *handle_pairs_internal;
>       int             nb_surfaces_used;
>   
>       // used in the frame allocator for non-opaque surfaces
> @@ -89,6 +96,9 @@ static const struct {
>   #if CONFIG_VAAPI
>       { MFX_HANDLE_VA_DISPLAY,          AV_HWDEVICE_TYPE_VAAPI, AV_PIX_FMT_VAAPI },
>   #endif
> +#if CONFIG_D3D11VA
> +    { MFX_HANDLE_D3D11_DEVICE,        AV_HWDEVICE_TYPE_D3D11VA, AV_PIX_FMT_D3D11 },
> +#endif
>   #if CONFIG_DXVA2
>       { MFX_HANDLE_D3D9_DEVICE_MANAGER, AV_HWDEVICE_TYPE_DXVA2, AV_PIX_FMT_DXVA2_VLD },
>   #endif
> @@ -115,29 +125,32 @@ static uint32_t qsv_fourcc_from_pix_fmt(enum AVPixelFormat pix_fmt)
>       return 0;
>   }
>   
> +#if CONFIG_D3D11VA
> +static uint32_t qsv_get_d3d11va_bind_flags(int mem_type)
> +{
> +    uint32_t bind_flags = 0;
> +
> +    if ((mem_type & MFX_MEMTYPE_VIDEO_MEMORY_ENCODER_TARGET) && (mem_type & MFX_MEMTYPE_INTERNAL_FRAME))
> +        bind_flags = D3D11_BIND_DECODER | D3D11_BIND_VIDEO_ENCODER;
> +    else
> +        bind_flags = D3D11_BIND_DECODER;
> +
> +    if ((MFX_MEMTYPE_FROM_VPPOUT & mem_type) || (MFX_MEMTYPE_VIDEO_MEMORY_PROCESSOR_TARGET & mem_type))
> +        bind_flags = D3D11_BIND_RENDER_TARGET;
> +
> +    return bind_flags;
> +}
> +#endif
> +
>   static int qsv_device_init(AVHWDeviceContext *ctx)
>   {
>       AVQSVDeviceContext *hwctx = ctx->hwctx;
>       QSVDeviceContext       *s = ctx->internal->priv;
> +    mfxHandleType handle_type = MFX_HANDLE_D3D11_DEVICE;
>   
>       mfxStatus err;
>       int i;
>   
> -    for (i = 0; supported_handle_types[i].handle_type; i++) {
> -        err = MFXVideoCORE_GetHandle(hwctx->session, supported_handle_types[i].handle_type,
> -                                     &s->handle);
> -        if (err == MFX_ERR_NONE) {
> -            s->handle_type       = supported_handle_types[i].handle_type;
> -            s->child_device_type = supported_handle_types[i].device_type;
> -            s->child_pix_fmt     = supported_handle_types[i].pix_fmt;
> -            break;
> -        }
> -    }
> -    if (!s->handle) {
> -        av_log(ctx, AV_LOG_VERBOSE, "No supported hw handle could be retrieved "
> -               "from the session\n");
> -    }
> -
>       err = MFXQueryIMPL(hwctx->session, &s->impl);
>       if (err == MFX_ERR_NONE)
>           err = MFXQueryVersion(hwctx->session, &s->ver);
> @@ -146,6 +159,31 @@ static int qsv_device_init(AVHWDeviceContext *ctx)
>           return AVERROR_UNKNOWN;
>       }
>   
> +    if (MFX_IMPL_VIA_D3D11 == MFX_IMPL_VIA_MASK(s->impl)) {
> +        handle_type = MFX_HANDLE_D3D11_DEVICE;
> +    } else if (MFX_IMPL_VIA_D3D9 == MFX_IMPL_VIA_MASK(s->impl)) {
> +        handle_type = MFX_HANDLE_D3D9_DEVICE_MANAGER;
> +    } else if (MFX_IMPL_VIA_VAAPI == MFX_IMPL_VIA_MASK(s->impl)) {
> +        handle_type = MFX_HANDLE_VA_DISPLAY;
> +    }
> +
> +    for (i = 0; supported_handle_types[i].handle_type; i++) {

This loop it not needed given the next line.

> +        if (supported_handle_types[i].handle_type == handle_type) {
> +            err = MFXVideoCORE_GetHandle(hwctx->session, supported_handle_types[i].handle_type,
> +                                        &s->handle);
> +            if (err == MFX_ERR_NONE) {
> +                s->handle_type       = supported_handle_types[i].handle_type;
> +                s->child_device_type = supported_handle_types[i].device_type;
> +                s->child_pix_fmt     = supported_handle_types[i].pix_fmt;
> +                break;
> +            }
> +        }
> +    }
> +    if (!s->handle) {
> +        av_log(ctx, AV_LOG_VERBOSE, "No supported hw handle could be retrieved "
> +               "from the session\n");
> +    }
> +
>       return 0;
>   }
>   
> @@ -175,6 +213,7 @@ static void qsv_frames_uninit(AVHWFramesContext *ctx)
>       av_freep(&s->mem_ids);
>       av_freep(&s->surface_ptrs);
>       av_freep(&s->surfaces_internal);
> +    av_freep(&s->handle_pairs_internal);
>       av_buffer_unref(&s->child_frames_ref);
>   }
>   
> @@ -190,6 +229,8 @@ static AVBufferRef *qsv_pool_alloc(void *opaque, int size)
>   
>       if (s->nb_surfaces_used < hwctx->nb_surfaces) {
>           s->nb_surfaces_used++;
> +        av_buffer_create((uint8_t*)(s->handle_pairs_internal + s->nb_surfaces_used - 1),
> +                                sizeof(*s->handle_pairs_internal), qsv_pool_release_dummy, NULL, 0);
>           return av_buffer_create((uint8_t*)(s->surfaces_internal + s->nb_surfaces_used - 1),
>                                   sizeof(*hwctx->surfaces), qsv_pool_release_dummy, NULL, 0);
>       }
> @@ -229,6 +270,13 @@ static int qsv_init_child_ctx(AVHWFramesContext *ctx)
>           child_device_hwctx->display = (VADisplay)device_priv->handle;
>       }
>   #endif
> +#if CONFIG_D3D11VA
> +    if (child_device_ctx->type == AV_HWDEVICE_TYPE_D3D11VA) {
> +        AVD3D11VADeviceContext *child_device_hwctx = child_device_ctx->hwctx;
> +        ID3D11Device_AddRef((ID3D11Device*)device_priv->handle);
> +        child_device_hwctx->device = (ID3D11Device*)device_priv->handle;
> +    }
> +#endif
>   #if CONFIG_DXVA2
>       if (child_device_ctx->type == AV_HWDEVICE_TYPE_DXVA2) {
>           AVDXVA2DeviceContext *child_device_hwctx = child_device_ctx->hwctx;
> @@ -255,6 +303,16 @@ static int qsv_init_child_ctx(AVHWFramesContext *ctx)
>       child_frames_ctx->width             = FFALIGN(ctx->width, 16);
>       child_frames_ctx->height            = FFALIGN(ctx->height, 16);
>   
> +#if CONFIG_D3D11VA
> +    if (child_device_ctx->type == AV_HWDEVICE_TYPE_D3D11VA) {
> +        AVD3D11VAFramesContext *child_frames_hwctx = child_frames_ctx->hwctx;
> +        if (hwctx->frame_type == 0)
> +            hwctx->frame_type = MFX_MEMTYPE_VIDEO_MEMORY_PROCESSOR_TARGET;
> +        if (hwctx->frame_type & MFX_MEMTYPE_SHARED_RESOURCE)
> +            child_frames_hwctx->MiscFlags = D3D11_RESOURCE_MISC_SHARED;
> +        child_frames_hwctx->BindFlags = qsv_get_d3d11va_bind_flags(hwctx->frame_type);
> +    }
> +#endif
>   #if CONFIG_DXVA2
>       if (child_device_ctx->type == AV_HWDEVICE_TYPE_DXVA2) {
>           AVDXVA2FramesContext *child_frames_hwctx = child_frames_ctx->hwctx;
> @@ -279,11 +337,33 @@ static int qsv_init_child_ctx(AVHWFramesContext *ctx)
>           hwctx->frame_type = MFX_MEMTYPE_VIDEO_MEMORY_DECODER_TARGET;
>       }
>   #endif
> +#if CONFIG_D3D11VA
> +    if (child_device_ctx->type == AV_HWDEVICE_TYPE_D3D11VA) {
> +        AVD3D11VAFramesContext *child_frames_hwctx = child_frames_ctx->hwctx;
> +        for (i = 0; i < ctx->initial_pool_size; i++) {
> +            s->handle_pairs_internal[i].first = (mfxMemId)child_frames_hwctx->texture_infos[i].texture;
> +            if(child_frames_hwctx->BindFlags & D3D11_BIND_RENDER_TARGET) {
> +                s->handle_pairs_internal[i].second = (mfxMemId)MFX_INFINITE;
> +            } else {
> +                s->handle_pairs_internal[i].second = (mfxMemId)child_frames_hwctx->texture_infos[i].index;
> +            }
> +            s->surfaces_internal[i].Data.MemId = (mfxMemId)&s->handle_pairs_internal[i];
> +        }
> +        if (child_frames_hwctx->BindFlags & D3D11_BIND_RENDER_TARGET) {
> +            hwctx->frame_type |= MFX_MEMTYPE_VIDEO_MEMORY_PROCESSOR_TARGET;
> +        } else {
> +            hwctx->frame_type |= MFX_MEMTYPE_VIDEO_MEMORY_DECODER_TARGET;
> +        }
> +    }
> +#endif
>   #if CONFIG_DXVA2
>       if (child_device_ctx->type == AV_HWDEVICE_TYPE_DXVA2) {
>           AVDXVA2FramesContext *child_frames_hwctx = child_frames_ctx->hwctx;
> -        for (i = 0; i < ctx->initial_pool_size; i++)
> -            s->surfaces_internal[i].Data.MemId = (mfxMemId)child_frames_hwctx->surfaces[i];
> +        for (i = 0; i < ctx->initial_pool_size; i++) {
> +            s->handle_pairs_internal[i].first = (mfxMemId)child_frames_hwctx->surfaces[i];
> +            s->handle_pairs_internal[i].second = (mfxMemId)MFX_INFINITE;
> +            s->surfaces_internal[i].Data.MemId = (mfxMemId)&s->handle_pairs_internal[i];
> +        }
>           if (child_frames_hwctx->surface_type == DXVA2_VideoProcessorRenderTarget)
>               hwctx->frame_type = MFX_MEMTYPE_VIDEO_MEMORY_PROCESSOR_TARGET;
>           else
> @@ -348,6 +428,11 @@ static int qsv_init_pool(AVHWFramesContext *ctx, uint32_t fourcc)
>           return AVERROR(EINVAL);
>       }
>   
> +    s->handle_pairs_internal = av_mallocz_array(ctx->initial_pool_size,
> +                                            sizeof(*s->handle_pairs_internal));
> +    if (!s->handle_pairs_internal)
> +        return AVERROR(ENOMEM);
> +
>       s->surfaces_internal = av_mallocz_array(ctx->initial_pool_size,
>                                               sizeof(*s->surfaces_internal));
>       if (!s->surfaces_internal)
> @@ -421,7 +506,17 @@ static mfxStatus frame_unlock(mfxHDL pthis, mfxMemId mid, mfxFrameData *ptr)
>   
>   static mfxStatus frame_get_hdl(mfxHDL pthis, mfxMemId mid, mfxHDL *hdl)
>   {
> +#if CONFIG_VAAPI
>       *hdl = mid;
> +#else
> +    mfxHDLPair *pair_dst = (mfxHDLPair*)hdl;
> +    mfxHDLPair *pair_src = (mfxHDLPair*)mid;
> +
> +    pair_dst->first = pair_src->first;
> +
> +    if (pair_src->second != (mfxMemId)MFX_INFINITE)
> +        pair_dst->second = pair_src->second;
> +#endif
>       return MFX_ERR_NONE;
>   }
>   
> @@ -621,6 +716,18 @@ static int qsv_frames_derive_from(AVHWFramesContext *dst_ctx,
>           }
>           break;
>   #endif
> +#if CONFIG_D3D11VA
> +    case AV_HWDEVICE_TYPE_D3D11VA:
> +        {
> +            AVD3D11VAFramesContext *dst_hwctx = dst_ctx->hwctx;
> +            mfxHDLPair *pair = (mfxHDLPair*)src_hwctx->surfaces[i].Data.MemId;
> +            dst_hwctx->texture = (ID3D11Texture2D*)pair->first;
> +            if (src_hwctx->frame_type & MFX_MEMTYPE_SHARED_RESOURCE)
> +                dst_hwctx->MiscFlags = D3D11_RESOURCE_MISC_SHARED;
> +            dst_hwctx->BindFlags = qsv_get_d3d11va_bind_flags(src_hwctx->frame_type);
> +        }
> +        break;
> +#endif
>   #if CONFIG_DXVA2
>       case AV_HWDEVICE_TYPE_DXVA2:
>           {
> @@ -629,9 +736,10 @@ static int qsv_frames_derive_from(AVHWFramesContext *dst_ctx,
>                                                      sizeof(*dst_hwctx->surfaces));
>               if (!dst_hwctx->surfaces)
>                   return AVERROR(ENOMEM);
> -            for (i = 0; i < src_hwctx->nb_surfaces; i++)
> -                dst_hwctx->surfaces[i] =
> -                    (IDirect3DSurface9*)src_hwctx->surfaces[i].Data.MemId;
> +            for (i = 0; i < src_hwctx->nb_surfaces; i++) {
> +                mfxHDLPair *pair = (mfxHDLPair*)src_hwctx->surfaces[i].Data.MemId;
> +                dst_hwctx->surfaces[i] = (IDirect3DSurface9*)pair->first;
> +            }
>               dst_hwctx->nb_surfaces = src_hwctx->nb_surfaces;
>               if (src_hwctx->frame_type == MFX_MEMTYPE_VIDEO_MEMORY_DECODER_TARGET)
>                   dst_hwctx->surface_type = DXVA2_VideoDecoderRenderTarget;
> @@ -668,10 +776,21 @@ static int qsv_map_from(AVHWFramesContext *ctx,
>           child_data = (uint8_t*)(intptr_t)*(VASurfaceID*)surf->Data.MemId;
>           break;
>   #endif
> +#if CONFIG_D3D11VA
> +    case AV_HWDEVICE_TYPE_D3D11VA:
> +    {
> +        mfxHDLPair *pair = (mfxHDLPair*)surf->Data.MemId;
> +        child_data = pair->first;
> +        break;
> +    }
> +#endif
>   #if CONFIG_DXVA2
>       case AV_HWDEVICE_TYPE_DXVA2:
> -        child_data = surf->Data.MemId;
> +    {
> +        mfxHDLPair *pair = (mfxHDLPair*)surf->Data.MemId;
> +        child_data = pair->first;
>           break;
> +    }
>   #endif
>       default:
>           return AVERROR(ENOSYS);
> @@ -685,7 +804,14 @@ static int qsv_map_from(AVHWFramesContext *ctx,
>   
>           dst->width   = src->width;
>           dst->height  = src->height;
> -        dst->data[3] = child_data;
> +
> +       if (child_frames_ctx->device_ctx->type == AV_HWDEVICE_TYPE_D3D11VA) {
> +            mfxHDLPair *pair = (mfxHDLPair*)surf->Data.MemId;
> +            dst->data[0] = pair->first;
> +            dst->data[1] = pair->second;
> +        } else {
> +            dst->data[3] = child_data;
> +        }
>   
>           return 0;
>       }
> @@ -708,7 +834,14 @@ static int qsv_map_from(AVHWFramesContext *ctx,
>       dummy->format        = child_frames_ctx->format;
>       dummy->width         = src->width;
>       dummy->height        = src->height;
> -    dummy->data[3]       = child_data;
> +
> +    if (child_frames_ctx->device_ctx->type == AV_HWDEVICE_TYPE_D3D11VA) {
> +        mfxHDLPair *pair = (mfxHDLPair*)surf->Data.MemId;
> +        dummy->data[0] = pair->first;
> +        dummy->data[1] = pair->second;
> +    } else {
> +        dummy->data[3] = child_data;
> +    }
>   
>       ret = av_hwframe_map(dst, dummy, flags);
>   
> @@ -954,6 +1087,12 @@ static int qsv_frames_derive_to(AVHWFramesContext *dst_ctx,
>       AVQSVFramesContext *dst_hwctx = dst_ctx->hwctx;
>       int i;
>   
> +    if (src_ctx->initial_pool_size == 0) {
> +        av_log(dst_ctx, AV_LOG_ERROR, "Only fixed-size pools can be "
> +            "mapped to QSV frames.\n");
> +        return AVERROR(EINVAL);
> +    }
> +
>       switch (src_ctx->device_ctx->type) {
>   #if CONFIG_VAAPI
>       case AV_HWDEVICE_TYPE_VAAPI:
> @@ -972,6 +1111,36 @@ static int qsv_frames_derive_to(AVHWFramesContext *dst_ctx,
>           }
>           break;
>   #endif
> +#if CONFIG_D3D11VA
> +    case AV_HWDEVICE_TYPE_D3D11VA:
> +        {
> +            AVD3D11VAFramesContext *src_hwctx = src_ctx->hwctx;
> +            s->handle_pairs_internal = av_mallocz_array(src_ctx->initial_pool_size, sizeof(*s->handle_pairs_internal));
> +            if (!s->handle_pairs_internal)
> +                return AVERROR(ENOMEM);
> +            s->surfaces_internal = av_mallocz_array(src_ctx->initial_pool_size,
> +                                                    sizeof(*s->surfaces_internal));
> +            if (!s->surfaces_internal)
> +                return AVERROR(ENOMEM);
> +            for (i = 0; i < src_ctx->initial_pool_size; i++) {
> +                qsv_init_surface(dst_ctx, &s->surfaces_internal[i]);
> +                s->handle_pairs_internal[i].first = (mfxMemId)src_hwctx->texture_infos[i].texture;
> +                if (src_hwctx->BindFlags & D3D11_BIND_RENDER_TARGET) {
> +                    s->handle_pairs_internal[i].second = (mfxMemId)MFX_INFINITE;
> +                } else {
> +                    s->handle_pairs_internal[i].second = (mfxMemId)src_hwctx->texture_infos[i].index;
> +                }
> +                s->surfaces_internal[i].Data.MemId = (mfxMemId)&s->handle_pairs_internal[i];
> +            }
> +            dst_hwctx->nb_surfaces = src_ctx->initial_pool_size;
> +            if (src_hwctx->BindFlags & D3D11_BIND_RENDER_TARGET) {
> +                dst_hwctx->frame_type |= MFX_MEMTYPE_VIDEO_MEMORY_PROCESSOR_TARGET;
> +            } else {
> +                dst_hwctx->frame_type |= MFX_MEMTYPE_VIDEO_MEMORY_DECODER_TARGET;
> +            }
> +        }
> +        break;
> +#endif
>   #if CONFIG_DXVA2
>       case AV_HWDEVICE_TYPE_DXVA2:
>           {
> @@ -982,7 +1151,9 @@ static int qsv_frames_derive_to(AVHWFramesContext *dst_ctx,
>                   return AVERROR(ENOMEM);
>               for (i = 0; i < src_hwctx->nb_surfaces; i++) {
>                   qsv_init_surface(dst_ctx, &s->surfaces_internal[i]);
> -                s->surfaces_internal[i].Data.MemId = (mfxMemId)src_hwctx->surfaces[i];
> +                s->handle_pairs_internal[i].first = (mfxMemId)src_hwctx->surfaces[i];
> +                s->handle_pairs_internal[i].second = (mfxMemId)MFX_INFINITE;
> +                s->surfaces_internal[i].Data.MemId = (mfxMemId)&s->handle_pairs_internal[i];
>               }
>               dst_hwctx->nb_surfaces = src_hwctx->nb_surfaces;
>               if (src_hwctx->surface_type == DXVA2_VideoProcessorRenderTarget)
> @@ -1005,21 +1176,43 @@ static int qsv_map_to(AVHWFramesContext *dst_ctx,
>                         AVFrame *dst, const AVFrame *src, int flags)
>   {
>       AVQSVFramesContext *hwctx = dst_ctx->hwctx;
> -    int i, err;
> +    int i, err, index = -1;
>   
> -    for (i = 0; i < hwctx->nb_surfaces; i++) {
> +    for (i = 0; i < hwctx->nb_surfaces && index < 0; i++) {
> +        switch(src->format) {
>   #if CONFIG_VAAPI
> -        if (*(VASurfaceID*)hwctx->surfaces[i].Data.MemId ==
> -            (VASurfaceID)(uintptr_t)src->data[3])
> +        case AV_PIX_FMT_VAAPI:
> +            if (*(VASurfaceID*)hwctx->surfaces[i].Data.MemId ==
> +                (VASurfaceID)(uintptr_t)src->data[3])
> +                index = i;
>               break;
>   #endif
> +#if CONFIG_D3D11VA
> +        case AV_PIX_FMT_D3D11:
> +        {
> +            mfxHDLPair *pair = (mfxHDLPair*)hwctx->surfaces[i].Data.MemId;
> +            if ((ID3D11Texture2D*)pair->first ==
> +                (ID3D11Texture2D*)(uintptr_t)src->data[0]

I don't think the ID3D11Texture2D* cast is needed for the comparison.

> +                && pair->second == (mfxMemId)src->data[1]) {
> +                index = i;
> +                break;
> +            }
> +        }
> +#endif
>   #if CONFIG_DXVA2
> -        if ((IDirect3DSurface9*)hwctx->surfaces[i].Data.MemId ==
> -            (IDirect3DSurface9*)(uintptr_t)src->data[3])
> -            break;
> +        case AV_PIX_FMT_DXVA2_VLD:
> +        {
> +            mfxHDLPair *pair = (mfxHDLPair*)hwctx->surfaces[i].Data.MemId;
> +            if ((IDirect3DSurface9*)pair->first ==
> +                (IDirect3DSurface9*)(uintptr_t)src->data[3]) {

I don't think the IDirect3DSurface9* is needed for the comparison.

> +                index = i;
> +                break;
> +            }
> +        }
>   #endif
> +        }
>       }
> -    if (i >= hwctx->nb_surfaces) {
> +    if (index < 0) {
>           av_log(dst_ctx, AV_LOG_ERROR, "Trying to map from a surface which "
>                  "is not in the mapped frames context.\n");
>           return AVERROR(EINVAL);
> @@ -1032,7 +1225,7 @@ static int qsv_map_to(AVHWFramesContext *dst_ctx,
>   
>       dst->width   = src->width;
>       dst->height  = src->height;
> -    dst->data[3] = (uint8_t*)&hwctx->surfaces[i];
> +    dst->data[3] = (uint8_t*)&hwctx->surfaces[index];
>   
>       return 0;
>   }
> @@ -1074,7 +1267,7 @@ static void qsv_device_free(AVHWDeviceContext *ctx)
>       av_freep(&priv);
>   }
>   
> -static mfxIMPL choose_implementation(const char *device)
> +static mfxIMPL choose_implementation(const char *device, enum AVHWDeviceType child_device_type)
>   {
>       static const struct {
>           const char *name;
> @@ -1103,6 +1296,10 @@ static mfxIMPL choose_implementation(const char *device)
>               impl = strtol(device, NULL, 0);
>       }
>   
> +    if ( (child_device_type == AV_HWDEVICE_TYPE_D3D11VA) && (impl != MFX_IMPL_SOFTWARE) ) {
> +        impl |= MFX_IMPL_VIA_D3D11;
> +    }
> +
>       return impl;
>   }
>   
> @@ -1129,6 +1326,15 @@ static int qsv_device_derive_from_child(AVHWDeviceContext *ctx,
>           }
>           break;
>   #endif
> +#if CONFIG_D3D11VA
> +    case AV_HWDEVICE_TYPE_D3D11VA:
> +        {
> +            AVD3D11VADeviceContext *child_device_hwctx = child_device_ctx->hwctx;
> +            handle_type = MFX_HANDLE_D3D11_DEVICE;
> +            handle = (mfxHDL)child_device_hwctx->device;
> +        }
> +        break;
> +#endif
>   #if CONFIG_DXVA2
>       case AV_HWDEVICE_TYPE_DXVA2:
>           {
> @@ -1191,7 +1397,9 @@ fail:
>   static int qsv_device_derive(AVHWDeviceContext *ctx,
>                                AVHWDeviceContext *child_device_ctx, int flags)
>   {
> -    return qsv_device_derive_from_child(ctx, MFX_IMPL_HARDWARE_ANY,
> +    mfxIMPL impl;
> +    impl = choose_implementation("hw_any", child_device_ctx->type);
> +    return qsv_device_derive_from_child(ctx, impl,
>                                           child_device_ctx, flags);
>   }
>   
> @@ -1214,35 +1422,66 @@ static int qsv_device_create(AVHWDeviceContext *ctx, const char *device,
>       ctx->user_opaque = priv;
>       ctx->free        = qsv_device_free;
>   
> -    e = av_dict_get(opts, "child_device", NULL, 0);
> -
> -    child_device_opts = NULL;
> -    if (CONFIG_VAAPI) {
> +    e = av_dict_get(opts, "child_device_type", NULL, 0);
> +    if (e) {
> +        child_device_type = av_hwdevice_find_type_by_name(e ? e->value : NULL);
> +        if (child_device_type == AV_HWDEVICE_TYPE_NONE) {
> +            av_log(ctx, AV_LOG_ERROR, "Unknown child device type "
> +                   "\"%s\".\n", e ? e->value : NULL);
> +            return AVERROR(EINVAL);
> +        }
> +    } else if (CONFIG_VAAPI) {
>           child_device_type = AV_HWDEVICE_TYPE_VAAPI;
> -        // libmfx does not actually implement VAAPI properly, rather it
> -        // depends on the specific behaviour of a matching iHD driver when
> -        // used on recent Intel hardware.  Set options to the VAAPI device
> -        // creation so that we should pick a usable setup by default if
> -        // possible, even when multiple devices and drivers are available.
> -        av_dict_set(&child_device_opts, "kernel_driver", "i915", 0);
> -        av_dict_set(&child_device_opts, "driver",        "iHD",  0);
> -    } else if (CONFIG_DXVA2)
> +    } else if (CONFIG_D3D11VA) {
> +        child_device_type = AV_HWDEVICE_TYPE_D3D11VA;
> +    } else if (CONFIG_DXVA2) {
>           child_device_type = AV_HWDEVICE_TYPE_DXVA2;
> -    else {
> +    } else {
>           av_log(ctx, AV_LOG_ERROR, "No supported child device type is enabled\n");
>           return AVERROR(ENOSYS);
>       }
>   
> +    child_device_opts = NULL;
> +    switch (child_device_type) {
> +#if CONFIG_VAAPI
> +    case AV_HWDEVICE_TYPE_VAAPI:
> +        {
> +            // libmfx does not actually implement VAAPI properly, rather it
> +            // depends on the specific behaviour of a matching iHD driver when
> +            // used on recent Intel hardware.  Set options to the VAAPI device
> +            // creation so that we should pick a usable setup by default if
> +            // possible, even when multiple devices and drivers are available.
> +            av_dict_set(&child_device_opts, "kernel_driver", "i915", 0);
> +            av_dict_set(&child_device_opts, "driver",        "iHD",  0);
> +        }
> +        break;
> +#endif
> +#if CONFIG_D3D11VA
> +    case AV_HWDEVICE_TYPE_D3D11VA:
> +        break;
> +#endif
> +#if CONFIG_DXVA2
> +    case AV_HWDEVICE_TYPE_DXVA2:
> +        break;
> +#endif
> +    default:
> +        {
> +            av_log(ctx, AV_LOG_ERROR, "No supported child device type is enabled\n");
> +            return AVERROR(ENOSYS);
> +        }
> +        break;
> +    }
> +
> +    e = av_dict_get(opts, "child_device", NULL, 0);
>       ret = av_hwdevice_ctx_create(&priv->child_device_ctx, child_device_type,
>                                    e ? e->value : NULL, child_device_opts, 0);
> -
>       av_dict_free(&child_device_opts);
>       if (ret < 0)
>           return ret;
>   
>       child_device = (AVHWDeviceContext*)priv->child_device_ctx->data;
>   
> -    impl = choose_implementation(device);
> +    impl = choose_implementation(device, child_device_type);
>   
>       return qsv_device_derive_from_child(ctx, impl, child_device, 0);
>   }
> -- 
> 2.26.0
> 
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