[FFmpeg-devel,1/6] libavutil: add support for AV_HWDEVICE_TYPE_D3D11VA

Submitted by Steve Lhomme on Jan. 4, 2017, 1:52 p.m.

Details

Message ID 20170104135243.13512-2-robux4@gmail.com
State New
Headers show

Commit Message

Steve Lhomme Jan. 4, 2017, 1:52 p.m.
---
 doc/APIchanges                 |   3 +
 libavutil/Makefile             |   3 +
 libavutil/hwcontext.c          |   3 +
 libavutil/hwcontext.h          |   1 +
 libavutil/hwcontext_d3d11va.c  | 461 +++++++++++++++++++++++++++++++++++++++++
 libavutil/hwcontext_d3d11va.h  |  70 +++++++
 libavutil/hwcontext_internal.h |   1 +
 libavutil/version.h            |   2 +-
 8 files changed, 543 insertions(+), 1 deletion(-)
 create mode 100644 libavutil/hwcontext_d3d11va.c
 create mode 100644 libavutil/hwcontext_d3d11va.h

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diff --git a/doc/APIchanges b/doc/APIchanges
index fbeae7a..76d1c8e 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -15,6 +15,9 @@  libavutil:     2015-08-28
 
 API changes, most recent first:
 
++2017-xx-xx - xxxxxxx - lavu 55.43.101 - hwcontext.h
++  Add AV_HWDEVICE_TYPE_D3D11VA to decode using Direct3D11.
++
 2016-12-10 - xxxxxxx - lavu xx.xx.100- imgutils.h
   Add av_image_check_size2()
 
diff --git a/libavutil/Makefile b/libavutil/Makefile
index 15d95de..376a11b 100644
--- a/libavutil/Makefile
+++ b/libavutil/Makefile
@@ -34,6 +34,7 @@  HEADERS = adler32.h                                                     \
           hmac.h                                                        \
           hwcontext.h                                                   \
           hwcontext_cuda.h                                              \
+          hwcontext_d3d11va.h                                           \
           hwcontext_dxva2.h                                             \
           hwcontext_qsv.h                                               \
           hwcontext_vaapi.h                                             \
@@ -156,6 +157,7 @@  OBJS = adler32.o                                                        \
 OBJS-$(!HAVE_ATOMICS_NATIVE)            += atomic.o                     \
 
 OBJS-$(CONFIG_CUDA)                     += hwcontext_cuda.o
+OBJS-$(CONFIG_D3D11VA)                  += hwcontext_d3d11va.o
 OBJS-$(CONFIG_DXVA2)                    += hwcontext_dxva2.o
 OBJS-$(CONFIG_QSV)                   += hwcontext_qsv.o
 OBJS-$(CONFIG_LZO)                      += lzo.o
@@ -170,6 +172,7 @@  SLIBOBJS-$(HAVE_GNU_WINDRES)            += avutilres.o
 
 SKIPHEADERS-$(HAVE_CUDA_H)             += hwcontext_cuda.h
 SKIPHEADERS-$(CONFIG_CUDA)             += hwcontext_cuda_internal.h
+SKIPHEADERS-$(CONFIG_D3D11VA)          += hwcontext_d3d11va.h
 SKIPHEADERS-$(CONFIG_DXVA2)            += hwcontext_dxva2.h
 SKIPHEADERS-$(CONFIG_QSV)           += hwcontext_qsv.h
 SKIPHEADERS-$(CONFIG_VAAPI)            += hwcontext_vaapi.h
diff --git a/libavutil/hwcontext.c b/libavutil/hwcontext.c
index 615f1f7..a9db84b 100644
--- a/libavutil/hwcontext.c
+++ b/libavutil/hwcontext.c
@@ -32,6 +32,9 @@  static const HWContextType *hw_table[] = {
 #if CONFIG_CUDA
     &ff_hwcontext_type_cuda,
 #endif
+#if CONFIG_D3D11VA
+    &ff_hwcontext_type_d3d11va,
+#endif
 #if CONFIG_DXVA2
     &ff_hwcontext_type_dxva2,
 #endif
diff --git a/libavutil/hwcontext.h b/libavutil/hwcontext.h
index 785da09..1325917 100644
--- a/libavutil/hwcontext.h
+++ b/libavutil/hwcontext.h
@@ -30,6 +30,7 @@  enum AVHWDeviceType {
     AV_HWDEVICE_TYPE_VAAPI,
     AV_HWDEVICE_TYPE_DXVA2,
     AV_HWDEVICE_TYPE_QSV,
+    AV_HWDEVICE_TYPE_D3D11VA,
 };
 
 typedef struct AVHWDeviceInternal AVHWDeviceInternal;
diff --git a/libavutil/hwcontext_d3d11va.c b/libavutil/hwcontext_d3d11va.c
new file mode 100644
index 0000000..3d9a34a
--- /dev/null
+++ b/libavutil/hwcontext_d3d11va.c
@@ -0,0 +1,461 @@ 
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <windows.h>
+
+#if !defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0600
+#undef _WIN32_WINNT
+#define _WIN32_WINNT 0x0600
+#endif
+#define COBJMACROS
+
+#include <initguid.h>
+#include <d3d11.h>
+#include <dxgi1_2.h>
+
+#include "avassert.h"
+#include "common.h"
+#include "hwcontext.h"
+#include "hwcontext_d3d11va.h"
+#include "hwcontext_internal.h"
+#include "imgutils.h"
+#include "pixdesc.h"
+#include "pixfmt.h"
+#include "compat/w32dlfcn.h"
+
+typedef HRESULT(WINAPI *PFN_CREATE_DXGI_FACTORY)(REFIID riid, void **ppFactory);
+
+typedef struct D3D11VAFramesContext {
+    ID3D11VideoDecoderOutputView **surfaces_internal;
+    int              nb_surfaces_used;
+
+    ID3D11DeviceContext *d3d11_context;
+
+    DXGI_FORMAT format;
+
+    ID3D11Texture2D     *staging_texture;
+} D3D11VAFramesContext;
+
+typedef struct D3D11VADevicePriv {
+    HMODULE d3dlib;
+} D3D11VADevicePriv;
+
+static const struct {
+    DXGI_FORMAT d3d_format;
+    enum AVPixelFormat pix_fmt;
+} supported_formats[] = {
+    { DXGI_FORMAT_NV12, AV_PIX_FMT_NV12 },
+    { DXGI_FORMAT_P010, AV_PIX_FMT_P010 },
+};
+
+static void d3d11va_frames_uninit(AVHWFramesContext *ctx)
+{
+    AVD3D11VAFramesContext *frames_hwctx = ctx->hwctx;
+    D3D11VAFramesContext *s = ctx->internal->priv;
+
+    av_freep(&s->surfaces_internal);
+
+    if (frames_hwctx->video_decoder)
+        ID3D11VideoDecoder_Release(frames_hwctx->video_decoder);
+
+    if (s->staging_texture)
+        ID3D11Texture2D_Release(s->staging_texture);
+
+    if (s->d3d11_context) {
+        ID3D11DeviceContext_Release(s->d3d11_context);
+        s->d3d11_context = NULL;
+    }
+}
+
+static void free_surface(void *opaque, uint8_t *data)
+{
+    ID3D11VideoDecoderOutputView_Release((ID3D11VideoDecoderOutputView*)data);
+}
+
+static AVBufferRef *d3d11va_pool_alloc(void *opaque, int size)
+{
+    AVHWFramesContext        *ctx = (AVHWFramesContext*)opaque;
+    D3D11VAFramesContext       *s = ctx->internal->priv;
+    AVD3D11VAFramesContext *hwctx = ctx->hwctx;
+
+    if (s->nb_surfaces_used < hwctx->nb_surfaces) {
+        s->nb_surfaces_used++;
+        return av_buffer_create((uint8_t*)s->surfaces_internal[s->nb_surfaces_used - 1],
+                                sizeof(*hwctx->surfaces), free_surface, 0, 0);
+    }
+
+    return NULL;
+}
+
+static int d3d11va_init_pool(AVHWFramesContext *ctx)
+{
+    AVD3D11VAFramesContext *frames_hwctx = ctx->hwctx;
+    AVD3D11VADeviceContext *device_hwctx = ctx->device_ctx->hwctx;
+    D3D11VAFramesContext              *s = ctx->internal->priv;
+
+    int i;
+    HRESULT hr;
+    D3D11_TEXTURE2D_DESC texDesc = {0};
+    ID3D11Texture2D *p_texture;
+    D3D11_VIDEO_DECODER_OUTPUT_VIEW_DESC viewDesc = {0};
+    D3D11_VIDEO_DECODER_DESC decoderDesc;
+    D3D11_VIDEO_DECODER_CONFIG decoderConfig;
+    ID3D11Device *d3d11_device;
+
+    if (ctx->initial_pool_size <= 0)
+        return 0;
+
+    hr = ID3D11VideoContext_QueryInterface(device_hwctx->video_context, &IID_ID3D11DeviceContext,
+                                           (void **)&s->d3d11_context);
+    if (FAILED(hr)) {
+        av_log(ctx, AV_LOG_ERROR, "Failed to get the device context %lx\n", hr);
+        return AVERROR_UNKNOWN;
+    }
+
+    for (i = 0; i < FF_ARRAY_ELEMS(supported_formats); i++) {
+        if (ctx->sw_format == supported_formats[i].pix_fmt) {
+            s->format = supported_formats[i].d3d_format;
+            break;
+        }
+    }
+    if (i == FF_ARRAY_ELEMS(supported_formats)) {
+        av_log(ctx, AV_LOG_ERROR, "Unsupported pixel format: %s\n",
+               av_get_pix_fmt_name(ctx->sw_format));
+        return AVERROR(EINVAL);
+    }
+
+    s->surfaces_internal = av_mallocz_array(ctx->initial_pool_size,
+                                            sizeof(*s->surfaces_internal));
+    if (!s->surfaces_internal)
+        return AVERROR(ENOMEM);
+
+    texDesc.Width = ctx->width;
+    texDesc.Height = ctx->height;
+    texDesc.MipLevels = 1;
+    texDesc.Format = s->format;
+    texDesc.SampleDesc.Count = 1;
+    texDesc.ArraySize = ctx->initial_pool_size;
+    texDesc.Usage = D3D11_USAGE_DEFAULT;
+    texDesc.BindFlags = D3D11_BIND_DECODER;
+
+    hr = ID3D11VideoDevice_QueryInterface(device_hwctx->video_device, &IID_ID3D11Device, (void **)&d3d11_device);
+    if (FAILED(hr)) {
+        av_log(ctx, AV_LOG_ERROR, "Failed to get the device %lx\n", hr);
+        return AVERROR_UNKNOWN;
+    }
+
+    hr = ID3D11Device_CreateTexture2D(d3d11_device, &texDesc, NULL, &p_texture);
+    if (FAILED(hr)) {
+        av_log(ctx, AV_LOG_ERROR, "Could not create the texture %lx\n", hr);
+        ID3D11Device_Release(d3d11_device);
+        return AVERROR_UNKNOWN;
+    }
+
+    hr = ID3D11VideoDecoder_GetCreationParameters(frames_hwctx->video_decoder, &decoderDesc, &decoderConfig);
+    if (FAILED(hr)) {
+        av_log(ctx, AV_LOG_ERROR, "Could not get the decoder config %lx\n", hr);
+        ID3D11Texture2D_Release(p_texture);
+        ID3D11Device_Release(d3d11_device);
+        return AVERROR_UNKNOWN;
+    }
+
+    viewDesc.DecodeProfile = decoderDesc.Guid;
+    viewDesc.ViewDimension = D3D11_VDOV_DIMENSION_TEXTURE2D;
+    for (i=0; i<ctx->initial_pool_size; i++)
+    {
+        hr = ID3D11VideoDevice_CreateVideoDecoderOutputView(device_hwctx->video_device,
+                                                            (ID3D11Resource*) p_texture,
+                                                            &viewDesc,
+                                                            (ID3D11VideoDecoderOutputView**) &s->surfaces_internal[i]);
+        if (FAILED(hr)) {
+            av_log(ctx, AV_LOG_ERROR, "Could not create the decoder output %d\n", i);
+            while (--i >= 0) {
+                ID3D11VideoDecoderOutputView_Release(s->surfaces_internal[i]);
+                s->surfaces_internal[i] = NULL;
+            }
+            ID3D11Texture2D_Release(p_texture);
+            ID3D11Device_Release(d3d11_device);
+            return AVERROR_UNKNOWN;
+        }
+    }
+    ID3D11Texture2D_Release(p_texture);
+
+    texDesc.ArraySize = 1;
+    texDesc.Usage = D3D11_USAGE_STAGING;
+    texDesc.BindFlags = 0;
+    texDesc.CPUAccessFlags = D3D11_CPU_ACCESS_READ | D3D11_CPU_ACCESS_WRITE;
+    hr = ID3D11Device_CreateTexture2D(d3d11_device, &texDesc, NULL, &s->staging_texture);
+    ID3D11Device_Release(d3d11_device);
+    if (FAILED(hr)) {
+        av_log(ctx, AV_LOG_ERROR, "Could not create the staging texture %lx\n", hr);
+        return AVERROR_UNKNOWN;
+    }
+
+    ctx->internal->pool_internal = av_buffer_pool_init2(sizeof(*s->surfaces_internal),
+                                                        ctx, d3d11va_pool_alloc, NULL);
+    if (!ctx->internal->pool_internal)
+        return AVERROR(ENOMEM);
+
+    frames_hwctx->surfaces    = s->surfaces_internal;
+    frames_hwctx->nb_surfaces = ctx->initial_pool_size;
+
+    return 0;
+}
+
+static int d3d11va_frames_init(AVHWFramesContext *ctx)
+{
+    int ret;
+
+    /* init the frame pool if the caller didn't provide one */
+    if (!ctx->pool) {
+        ret = d3d11va_init_pool(ctx);
+        if (ret < 0) {
+            av_log(ctx, AV_LOG_ERROR, "Error creating an internal frame pool\n");
+            return ret;
+        }
+    }
+
+    return 0;
+}
+
+static int d3d11va_get_buffer(AVHWFramesContext *ctx, AVFrame *frame)
+{
+    frame->buf[0] = av_buffer_pool_get(ctx->pool);
+    if (!frame->buf[0])
+        return AVERROR(ENOMEM);
+
+    frame->data[3] = frame->buf[0]->data;
+    frame->format  = AV_PIX_FMT_D3D11VA_VLD;
+    frame->width   = ctx->width;
+    frame->height  = ctx->height;
+
+    return 0;
+}
+
+static int d3d11va_transfer_get_formats(AVHWFramesContext *ctx,
+                                      enum AVHWFrameTransferDirection dir,
+                                      enum AVPixelFormat **formats)
+{
+    enum AVPixelFormat *fmts;
+
+    fmts = av_malloc_array(2, sizeof(*fmts));
+    if (!fmts)
+        return AVERROR(ENOMEM);
+
+    fmts[0] = ctx->sw_format;
+    fmts[1] = AV_PIX_FMT_NONE;
+
+    *formats = fmts;
+
+    return 0;
+}
+
+static int d3d11va_transfer_data(AVHWFramesContext *ctx, AVFrame *dst,
+                                 const AVFrame *src)
+{
+    ID3D11VideoDecoderOutputView *surface;
+    D3D11_VIDEO_DECODER_OUTPUT_VIEW_DESC    surfaceDesc;
+    D3D11_TEXTURE2D_DESC dstDesc;
+    D3D11_MAPPED_SUBRESOURCE     LockedRect;
+    ID3D11Resource *pTexture;
+    HRESULT            hr;
+    AVD3D11VAFramesContext *frames_hwctx = ctx->hwctx;
+    AVD3D11VADeviceContext *device_hwctx = ctx->device_ctx->hwctx;
+    D3D11VAFramesContext              *s = ctx->internal->priv;
+
+    uint8_t *surf_data[4]     = { NULL };
+    int      surf_linesize[4] = { 0 };
+    int i;
+
+    int download = !!src->hw_frames_ctx;
+
+    surface = (ID3D11VideoDecoderOutputView*)(download ? src->data[3] : dst->data[3]);
+
+    ID3D11VideoDecoderOutputView_GetDesc(surface, &surfaceDesc);
+    ID3D11VideoDecoderOutputView_GetResource(surface, &pTexture);
+    ID3D11Texture2D_GetDesc(s->staging_texture, &dstDesc);
+
+    WaitForSingleObjectEx(device_hwctx->dev_ctx_mutex, INFINITE, FALSE);
+
+    ID3D11DeviceContext_CopySubresourceRegion(s->d3d11_context, (ID3D11Resource*)s->staging_texture,
+                                              0, 0, 0, 0,
+                                              (ID3D11Resource*)pTexture, surfaceDesc.Texture2D.ArraySlice,
+                                              NULL);
+    ID3D11Resource_Release(pTexture);
+
+    hr = ID3D11DeviceContext_Map(s->d3d11_context, (ID3D11Resource*)s->staging_texture,
+                                 0, download ? D3D11_MAP_READ : D3D11_MAP_WRITE, 0, &LockedRect);
+    if (FAILED(hr)) {
+        av_log(ctx, AV_LOG_ERROR, "Unable to lock D3D11VA surface %lx\n", hr);
+        ReleaseMutex(device_hwctx->dev_ctx_mutex);
+        return AVERROR_UNKNOWN;
+    }
+
+    for (i = 0; download ? dst->data[i] : src->data[i]; i++)
+        surf_linesize[i] = LockedRect.RowPitch;
+
+    av_image_fill_pointers(surf_data, ctx->sw_format, dstDesc.Height,
+                           (uint8_t*)LockedRect.pData, surf_linesize);
+
+    if (download) {
+        av_image_copy(dst->data, dst->linesize, surf_data, surf_linesize,
+                      ctx->sw_format, src->width, src->height);
+    } else {
+        av_image_copy(surf_data, surf_linesize, src->data, src->linesize,
+                      ctx->sw_format, src->width, src->height);
+    }
+
+    ID3D11DeviceContext_Unmap(s->d3d11_context, (ID3D11Resource*)s->staging_texture, 0);
+    ReleaseMutex(device_hwctx->dev_ctx_mutex);
+
+    return 0;
+}
+
+static void d3d11va_device_free(AVHWDeviceContext *ctx)
+{
+    AVD3D11VADeviceContext *device_hwctx = ctx->hwctx;
+    D3D11VADevicePriv              *priv = ctx->user_opaque;
+
+    if (device_hwctx->video_device)
+        ID3D11Device_Release(device_hwctx->video_device);
+
+    if (device_hwctx->video_context)
+        ID3D11VideoContext_Release(device_hwctx->video_context);
+
+    if (device_hwctx->dev_ctx_mutex != INVALID_HANDLE_VALUE)
+        ReleaseMutex(device_hwctx->dev_ctx_mutex);
+
+    if (priv->d3dlib)
+        FreeLibrary(priv->d3dlib);
+
+    av_freep(&ctx->user_opaque);
+}
+
+static int d3d11va_device_create(AVHWDeviceContext *ctx, const char *device,
+                                 AVDictionary *opts, int flags)
+{
+    AVD3D11VADeviceContext *device_hwctx = ctx->hwctx;
+    D3D11VADevicePriv *priv;
+
+    HRESULT hr;
+    PFN_D3D11_CREATE_DEVICE createD3D;
+    IDXGIAdapter           *pAdapter = NULL;
+    ID3D10Multithread      *pMultithread;
+    ID3D11Device           *d3d11_device;
+    ID3D11DeviceContext    *d3d11_context;
+    UINT creationFlags = D3D11_CREATE_DEVICE_VIDEO_SUPPORT;
+    /* if the DirectX SDK is installed creationFlags |= D3D11_CREATE_DEVICE_DEBUG; */
+
+    if (device) {
+        PFN_CREATE_DXGI_FACTORY mCreateDXGIFactory;
+        HMODULE dxgilib = dlopen("dxgi.dll", 0);
+        if (!dxgilib)
+            return AVERROR_UNKNOWN;
+
+        mCreateDXGIFactory = (PFN_CREATE_DXGI_FACTORY) dlsym(dxgilib, "CreateDXGIFactory");
+        if (mCreateDXGIFactory) {
+            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);
+            }
+        }
+        FreeLibrary(dxgilib);
+    }
+
+    priv = av_mallocz(sizeof(*priv));
+    if (!priv)
+        return AVERROR(ENOMEM);
+
+    ctx->user_opaque = priv;
+    ctx->free        = d3d11va_device_free;
+
+    priv->d3dlib = dlopen("d3d11.dll", 0);
+    if (!priv->d3dlib) {
+        av_log(ctx, AV_LOG_ERROR, "Failed to load D3D11 library\n");
+        return AVERROR_UNKNOWN;
+    }
+
+    createD3D = (PFN_D3D11_CREATE_DEVICE)dlsym(priv->d3dlib, "D3D11CreateDevice");
+    if (!createD3D) {
+        av_log(ctx, AV_LOG_ERROR, "Failed to locate D3D11CreateDevice\n");
+        return AVERROR_UNKNOWN;
+    }
+
+    hr = createD3D(pAdapter, pAdapter ? D3D_DRIVER_TYPE_UNKNOWN : D3D_DRIVER_TYPE_HARDWARE, NULL, creationFlags, NULL, 0,
+                   D3D11_SDK_VERSION, &d3d11_device, NULL, &d3d11_context);
+    if (pAdapter)
+        IDXGIAdapter_Release(pAdapter);
+    if (FAILED(hr)) {
+        av_log(ctx, AV_LOG_ERROR, "Failed to create Direct3D device %lx\n", hr);
+        return AVERROR_UNKNOWN;
+    }
+
+    hr = ID3D11Device_QueryInterface(d3d11_device, &IID_ID3D10Multithread, (void **)&pMultithread);
+    if (SUCCEEDED(hr)) {
+        ID3D10Multithread_SetMultithreadProtected(pMultithread, TRUE);
+        ID3D10Multithread_Release(pMultithread);
+    }
+
+    hr = ID3D11DeviceContext_QueryInterface(d3d11_context, &IID_ID3D11VideoContext,
+                                            (void **)&device_hwctx->video_context);
+    ID3D11DeviceContext_Release(d3d11_context);
+    if (FAILED(hr)) {
+        av_log(ctx, AV_LOG_ERROR, "Failed to get the Video Context %lx\n", hr);
+        ID3D11Device_Release(d3d11_device);
+        return AVERROR_UNKNOWN;
+    }
+
+    hr = ID3D11Device_QueryInterface(d3d11_device, &IID_ID3D11VideoDevice,
+                                     (void **)&device_hwctx->video_device);
+    ID3D11Device_Release(d3d11_device);
+    if (FAILED(hr)) {
+        av_log(NULL, AV_LOG_ERROR, "Failed to get the Video Device %lx\n", hr);
+        return AVERROR_UNKNOWN;
+    }
+
+    device_hwctx->dev_ctx_mutex = CreateMutex(NULL, 0, NULL);
+    if (device_hwctx->dev_ctx_mutex == INVALID_HANDLE_VALUE) {
+        av_log(NULL, AV_LOG_ERROR, "Failed to get a mutex for the D3D11VA decoder\n");
+        return AVERROR(EINVAL);
+    }
+
+    return 0;
+}
+
+const HWContextType ff_hwcontext_type_d3d11va = {
+    .type                 = AV_HWDEVICE_TYPE_D3D11VA,
+    .name                 = "D3D11VA",
+
+    .device_hwctx_size    = sizeof(AVD3D11VADeviceContext),
+    .frames_hwctx_size    = sizeof(AVD3D11VAFramesContext),
+    .frames_priv_size     = sizeof(D3D11VAFramesContext),
+
+    .device_create        = d3d11va_device_create,
+    .frames_init          = d3d11va_frames_init,
+    .frames_uninit        = d3d11va_frames_uninit,
+    .frames_get_buffer    = d3d11va_get_buffer,
+    .transfer_get_formats = d3d11va_transfer_get_formats,
+    .transfer_data_to     = d3d11va_transfer_data,
+    .transfer_data_from   = d3d11va_transfer_data,
+
+    .pix_fmts             = (const enum AVPixelFormat[]){ AV_PIX_FMT_D3D11VA_VLD, AV_PIX_FMT_NONE },
+};
diff --git a/libavutil/hwcontext_d3d11va.h b/libavutil/hwcontext_d3d11va.h
new file mode 100644
index 0000000..31dad6d
--- /dev/null
+++ b/libavutil/hwcontext_d3d11va.h
@@ -0,0 +1,70 @@ 
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+
+#ifndef AVUTIL_HWCONTEXT_D3D11VA_H
+#define AVUTIL_HWCONTEXT_D3D11VA_H
+
+/**
+ * @file
+ * An API-specific header for AV_HWDEVICE_TYPE_D3D11VA.
+ *
+ * Only fixed-size pools are supported.
+ *
+ * For user-allocated pools, AVHWFramesContext.pool must return AVBufferRefs
+ * with the data pointer set to a pointer to ID3D11VideoDecoderOutputView.
+ */
+
+#include <d3d11.h>
+
+/**
+ * This struct is allocated as AVHWDeviceContext.hwctx
+ */
+typedef struct AVD3D11VADeviceContext {
+    ID3D11VideoDevice   *video_device;
+    ID3D11VideoContext  *video_context;
+
+    /**
+     * Mutex owned by this context to avoid accessing the video_context from
+     * multiple threads simultaneously.
+     */
+    HANDLE               dev_ctx_mutex;
+} AVD3D11VADeviceContext;
+
+/**
+ * This struct is allocated as AVHWFramesContext.hwctx
+ */
+typedef struct AVD3D11VAFramesContext {
+    /**
+     * The surface pool. When an external pool is not provided by the caller,
+     * this will be managed (allocated and filled on init, freed on uninit) by
+     * libavutil.
+     * When it is provided the allocation/deallocation is up to the caller.
+     */
+    ID3D11VideoDecoderOutputView **surfaces;
+    int                         nb_surfaces;
+
+    /**
+     * Video decoder created by the caller. It must be set before
+     * av_hwframe_ctx_init() is called. When decoding is done it will be
+     * released.
+     */
+    ID3D11VideoDecoder  *video_decoder;
+} AVD3D11VAFramesContext;
+
+#endif /* AVUTIL_HWCONTEXT_D3D11VA_H */
diff --git a/libavutil/hwcontext_internal.h b/libavutil/hwcontext_internal.h
index 079e42b..aaa6286 100644
--- a/libavutil/hwcontext_internal.h
+++ b/libavutil/hwcontext_internal.h
@@ -100,6 +100,7 @@  struct AVHWFramesInternal {
 };
 
 extern const HWContextType ff_hwcontext_type_cuda;
+extern const HWContextType ff_hwcontext_type_d3d11va;
 extern const HWContextType ff_hwcontext_type_dxva2;
 extern const HWContextType ff_hwcontext_type_qsv;
 extern const HWContextType ff_hwcontext_type_vaapi;
diff --git a/libavutil/version.h b/libavutil/version.h
index 9f8c4c2..6dac240 100644
--- a/libavutil/version.h
+++ b/libavutil/version.h
@@ -80,7 +80,7 @@ 
 
 #define LIBAVUTIL_VERSION_MAJOR  55
 #define LIBAVUTIL_VERSION_MINOR  43
-#define LIBAVUTIL_VERSION_MICRO 100
+#define LIBAVUTIL_VERSION_MICRO 101
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
                                                LIBAVUTIL_VERSION_MINOR, \