[FFmpeg-devel] ffmpeg: add ffmpeg_d3d11va

Submitted by Steve Lhomme on Dec. 13, 2016, 1:16 p.m.

Details

Message ID 20161213131647.17912-1-robUx4@gmail.com
State New
Headers show

Commit Message

Steve Lhomme Dec. 13, 2016, 1:16 p.m.
From: Steve Lhomme <slhomme@videolabs.io>

The code is similar to ffmpeg_dxva2. The decoded output needs to be copied into
a staging texture that can be accessed by the CPU as the decoder texture can't
be accessed by the CPU.
---
 Makefile                       |   1 +
 configure                      |  14 ++
 ffmpeg.h                       |   2 +
 ffmpeg_d3d11va.c               | 416 +++++++++++++++++++++++++++++++++++++++
 ffmpeg_opt.c                   |   3 +
 libavutil/Makefile             |   3 +
 libavutil/hwcontext.c          |   3 +
 libavutil/hwcontext.h          |   1 +
 libavutil/hwcontext_d3d11va.c  | 436 +++++++++++++++++++++++++++++++++++++++++
 libavutil/hwcontext_d3d11va.h  |  74 +++++++
 libavutil/hwcontext_internal.h |   1 +
 libavutil/version.h            |   2 +-
 12 files changed, 955 insertions(+), 1 deletion(-)
 create mode 100644 ffmpeg_d3d11va.c
 create mode 100644 libavutil/hwcontext_d3d11va.c
 create mode 100644 libavutil/hwcontext_d3d11va.h

Patch hide | download patch | download mbox

diff --git a/Makefile b/Makefile
index 8aa72fd..a48d471 100644
--- a/Makefile
+++ b/Makefile
@@ -38,6 +38,7 @@  OBJS-ffmpeg-$(CONFIG_VDA)     += ffmpeg_videotoolbox.o
 endif
 OBJS-ffmpeg-$(CONFIG_CUVID)   += ffmpeg_cuvid.o
 OBJS-ffmpeg-$(HAVE_DXVA2_LIB) += ffmpeg_dxva2.o
+OBJS-ffmpeg-$(HAVE_D3D11VA_LIB) += ffmpeg_d3d11va.o
 OBJS-ffmpeg-$(HAVE_VDPAU_X11) += ffmpeg_vdpau.o
 OBJS-ffserver                 += ffserver_config.o
 
diff --git a/configure b/configure
index 9dfd006..dea8339 100755
--- a/configure
+++ b/configure
@@ -2050,6 +2050,8 @@  HAVE_LIST="
     $TYPES_LIST
     atomics_native
     dos_paths
+    d3d11va_lib
+    d3d11vaapi_cobj
     dxva2_lib
     dxva2api_cobj
     libc_msvcrt
@@ -6037,6 +6039,15 @@  enabled dxva2api_h &&
 int main(void) { IDirectXVideoDecoder *o = NULL; IDirectXVideoDecoder_Release(o); return 0; }
 EOF
 
+enabled d3d11_h &&
+    check_cc <<EOF && enable d3d11vaapi_cobj
+#define _WIN32_WINNT 0x0600
+#define COBJMACROS
+#include <windows.h>
+#include <d3d11.h>
+int main(void) { ID3D11VideoDevice *o = NULL; ID3D11VideoDevice_Release(o); return 0; }
+EOF
+
 enabled vaapi &&
     check_lib va/va.h vaInitialize -lva ||
     disable vaapi
@@ -6368,6 +6379,9 @@  if test $target_os = "haiku"; then
     disable posix_memalign
 fi
 
+enabled_all d3d11va d3d11vaapi_cobj &&
+    enable d3d11va_lib
+
 enabled_all dxva2 dxva2api_cobj CoTaskMemFree &&
     prepend ffmpeg_libs $($ldflags_filter "-lole32") &&
     enable dxva2_lib
diff --git a/ffmpeg.h b/ffmpeg.h
index ebe5bf0..a12701e 100644
--- a/ffmpeg.h
+++ b/ffmpeg.h
@@ -61,6 +61,7 @@  enum HWAccelID {
     HWACCEL_NONE = 0,
     HWACCEL_AUTO,
     HWACCEL_VDPAU,
+    HWACCEL_D3D11VA,
     HWACCEL_DXVA2,
     HWACCEL_VDA,
     HWACCEL_VIDEOTOOLBOX,
@@ -633,6 +634,7 @@  int ifilter_parameters_from_decoder(InputFilter *ifilter, const AVCodecContext *
 int ffmpeg_parse_options(int argc, char **argv);
 
 int vdpau_init(AVCodecContext *s);
+int d3d11va_init(AVCodecContext *s);
 int dxva2_init(AVCodecContext *s);
 int vda_init(AVCodecContext *s);
 int videotoolbox_init(AVCodecContext *s);
diff --git a/ffmpeg_d3d11va.c b/ffmpeg_d3d11va.c
new file mode 100644
index 0000000..f6f8186
--- /dev/null
+++ b/ffmpeg_d3d11va.c
@@ -0,0 +1,416 @@ 
+/*
+ * 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 <stdint.h>
+
+#include <d3d11.h>
+
+#include "ffmpeg.h"
+
+#include "libavcodec/d3d11va.h"
+
+#include "libavutil/avassert.h"
+#include "libavutil/buffer.h"
+#include "libavutil/frame.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/pixfmt.h"
+
+#include "libavutil/hwcontext.h"
+#include "libavutil/hwcontext_d3d11va.h"
+
+/* define all the GUIDs used directly here,
+   to avoid problems with inconsistent dxva2api.h versions in mingw-w64 and different MSVC version */
+#include <initguid.h>
+DEFINE_GUID(DXVA2_ModeMPEG2_VLD,      0xee27417f, 0x5e28,0x4e65,0xbe,0xea,0x1d,0x26,0xb5,0x08,0xad,0xc9);
+DEFINE_GUID(DXVA2_ModeMPEG2and1_VLD,  0x86695f12, 0x340e,0x4f04,0x9f,0xd3,0x92,0x53,0xdd,0x32,0x74,0x60);
+DEFINE_GUID(DXVA2_ModeH264_E,         0x1b81be68, 0xa0c7,0x11d3,0xb9,0x84,0x00,0xc0,0x4f,0x2e,0x73,0xc5);
+DEFINE_GUID(DXVA2_ModeH264_F,         0x1b81be69, 0xa0c7,0x11d3,0xb9,0x84,0x00,0xc0,0x4f,0x2e,0x73,0xc5);
+DEFINE_GUID(DXVADDI_Intel_ModeH264_E, 0x604F8E68, 0x4951,0x4C54,0x88,0xFE,0xAB,0xD2,0x5C,0x15,0xB3,0xD6);
+DEFINE_GUID(DXVA2_ModeVC1_D,          0x1b81beA3, 0xa0c7,0x11d3,0xb9,0x84,0x00,0xc0,0x4f,0x2e,0x73,0xc5);
+DEFINE_GUID(DXVA2_ModeVC1_D2010,      0x1b81beA4, 0xa0c7,0x11d3,0xb9,0x84,0x00,0xc0,0x4f,0x2e,0x73,0xc5);
+DEFINE_GUID(DXVA2_ModeHEVC_VLD_Main,  0x5b11d51b, 0x2f4c,0x4452,0xbc,0xc3,0x09,0xf2,0xa1,0x16,0x0c,0xc0);
+DEFINE_GUID(DXVA2_ModeHEVC_VLD_Main10,0x107af0e0, 0xef1a,0x4d19,0xab,0xa8,0x67,0xa1,0x63,0x07,0x3d,0x13);
+DEFINE_GUID(DXVA2_ModeVP9_VLD_Profile0, 0x463707f8, 0xa1d0,0x4585,0x87,0x6d,0x83,0xaa,0x6d,0x60,0xb8,0x9e);
+DEFINE_GUID(DXVA2_NoEncrypt,          0x1b81beD0, 0xa0c7,0x11d3,0xb9,0x84,0x00,0xc0,0x4f,0x2e,0x73,0xc5);
+
+typedef struct d3d11va_mode {
+  const GUID     *guid;
+  enum AVCodecID codec;
+} d3d11va_mode;
+
+static const d3d11va_mode d3d11va_modes[] = {
+    /* MPEG-2 */
+    { &DXVA2_ModeMPEG2_VLD,      AV_CODEC_ID_MPEG2VIDEO },
+    { &DXVA2_ModeMPEG2and1_VLD,  AV_CODEC_ID_MPEG2VIDEO },
+
+    /* H.264 */
+    { &DXVA2_ModeH264_F,         AV_CODEC_ID_H264 },
+    { &DXVA2_ModeH264_E,         AV_CODEC_ID_H264 },
+    /* Intel specific H.264 mode */
+    { &DXVADDI_Intel_ModeH264_E, AV_CODEC_ID_H264 },
+
+    /* VC-1 / WMV3 */
+    { &DXVA2_ModeVC1_D2010,      AV_CODEC_ID_VC1  },
+    { &DXVA2_ModeVC1_D2010,      AV_CODEC_ID_WMV3 },
+    { &DXVA2_ModeVC1_D,          AV_CODEC_ID_VC1  },
+    { &DXVA2_ModeVC1_D,          AV_CODEC_ID_WMV3 },
+
+    /* HEVC/H.265 */
+    { &DXVA2_ModeHEVC_VLD_Main,  AV_CODEC_ID_HEVC },
+    { &DXVA2_ModeHEVC_VLD_Main10,AV_CODEC_ID_HEVC },
+
+    /* VP8/9 */
+    { &DXVA2_ModeVP9_VLD_Profile0, AV_CODEC_ID_VP9 },
+
+    { NULL,                      0 },
+};
+
+typedef struct D3D11VAContext {
+    D3D11_VIDEO_DECODER_CONFIG   decoder_config;
+
+    AVFrame                     *tmp_frame;
+
+    AVBufferRef                 *hw_device_ctx;
+    AVBufferRef                 *hw_frames_ctx;
+} D3D11VAContext;
+
+static void d3d11va_uninit(AVCodecContext *s)
+{
+    InputStream  *ist = s->opaque;
+    D3D11VAContext *ctx = ist->hwaccel_ctx;
+
+    ist->hwaccel_uninit        = NULL;
+    ist->hwaccel_get_buffer    = NULL;
+    ist->hwaccel_retrieve_data = NULL;
+
+    av_buffer_unref(&ctx->hw_frames_ctx);
+    av_buffer_unref(&ctx->hw_device_ctx);
+
+    av_frame_free(&ctx->tmp_frame);
+
+    av_freep(&ist->hwaccel_ctx);
+    av_freep(&s->hwaccel_context);
+}
+
+static int d3d11va_get_buffer(AVCodecContext *s, AVFrame *frame, int flags)
+{
+    InputStream  *ist = s->opaque;
+    D3D11VAContext *ctx = ist->hwaccel_ctx;
+
+    return av_hwframe_get_buffer(ctx->hw_frames_ctx, frame, 0);
+}
+
+static int d3d11va_retrieve_data(AVCodecContext *s, AVFrame *frame)
+{
+    InputStream        *ist = s->opaque;
+    D3D11VAContext     *ctx = ist->hwaccel_ctx;
+    int                ret;
+
+    ret = av_hwframe_transfer_data(ctx->tmp_frame, frame, 0);
+    if (ret < 0)
+        return ret;
+
+    ret = av_frame_copy_props(ctx->tmp_frame, frame);
+    if (ret < 0) {
+        av_frame_unref(ctx->tmp_frame);
+        return ret;
+    }
+
+    av_frame_unref(frame);
+    av_frame_move_ref(frame, ctx->tmp_frame);
+
+    return 0;
+}
+
+static int d3d11va_alloc(AVCodecContext *s)
+{
+    InputStream  *ist = s->opaque;
+    D3D11VAContext *ctx;
+
+    int ret;
+
+    ctx = av_mallocz(sizeof(*ctx));
+    if (!ctx)
+        return AVERROR(ENOMEM);
+
+    ist->hwaccel_ctx           = ctx;
+    ist->hwaccel_uninit        = d3d11va_uninit;
+    ist->hwaccel_get_buffer    = d3d11va_get_buffer;
+    ist->hwaccel_retrieve_data = d3d11va_retrieve_data;
+
+    ret = av_hwdevice_ctx_create(&ctx->hw_device_ctx, AV_HWDEVICE_TYPE_D3D11VA,
+                                 ist->hwaccel_device, NULL, 0);
+    if (ret < 0)
+        goto fail;
+
+    ctx->tmp_frame = av_frame_alloc();
+    if (!ctx->tmp_frame)
+        goto fail;
+
+    s->hwaccel_context = av_mallocz(sizeof(AVD3D11VAContext));
+    if (!s->hwaccel_context)
+        goto fail;
+
+    return 0;
+fail:
+    d3d11va_uninit(s);
+    return AVERROR(EINVAL);
+}
+
+static int d3d11va_get_decoder_configuration(AVCodecContext *s,
+                                           const D3D11_VIDEO_DECODER_DESC *desc,
+                                           D3D11_VIDEO_DECODER_CONFIG *config)
+{
+    InputStream  *ist = s->opaque;
+    int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
+    D3D11VAContext *ctx = ist->hwaccel_ctx;
+    unsigned cfg_count = 0, best_score = 0;
+    D3D11_VIDEO_DECODER_CONFIG best_cfg = {{0}};
+    HRESULT hr;
+    int i;
+    AVHWDeviceContext    *device_ctx = (AVHWDeviceContext*)ctx->hw_device_ctx->data;
+    AVD3D11VADeviceContext *device_hwctx = device_ctx->hwctx;
+
+    hr = ID3D11VideoDevice_GetVideoDecoderConfigCount(device_hwctx->video_device, desc, &cfg_count);
+    if (FAILED(hr)) {
+        av_log(NULL, loglevel, "Unable to retrieve decoder configurations\n");
+        return AVERROR(EINVAL);
+    }
+
+    for (i = 0; i < cfg_count; i++) {
+        unsigned score;
+        D3D11_VIDEO_DECODER_CONFIG cfg;
+        hr = ID3D11VideoDevice_GetVideoDecoderConfig(device_hwctx->video_device, desc, i, &cfg );
+        if (FAILED(hr)) {
+            av_log(NULL, loglevel, "Unable to retrieve decoder configurations. (hr=0x%lX)\n", hr);
+            return AVERROR(EINVAL);
+        }
+
+        if (cfg.ConfigBitstreamRaw == 1)
+            score = 1;
+        else if (s->codec_id == AV_CODEC_ID_H264 && cfg.ConfigBitstreamRaw == 2)
+            score = 2;
+        else
+            continue;
+        if (IsEqualGUID(&cfg.guidConfigBitstreamEncryption, &DXVA2_NoEncrypt))
+            score += 16;
+        if (score > best_score) {
+            best_score = score;
+            best_cfg   = cfg;
+        }
+    }
+
+    if (!best_score) {
+        av_log(NULL, loglevel, "No valid decoder configuration available\n");
+        return AVERROR(EINVAL);
+    }
+
+    *config = best_cfg;
+    return 0;
+}
+
+static int d3d11va_create_decoder(AVCodecContext *s)
+{
+    InputStream  *ist = s->opaque;
+    int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
+    D3D11VAContext *ctx = ist->hwaccel_ctx;
+    AVD3D11VAContext *dxva_ctx = s->hwaccel_context;
+    GUID *guid_list = NULL;
+    unsigned guid_count = 0, i, j;
+    GUID device_guid = GUID_NULL;
+    const DXGI_FORMAT surface_format = (s->sw_pix_fmt == AV_PIX_FMT_YUV420P10) ? DXGI_FORMAT_P010 : DXGI_FORMAT_NV12;
+    DXGI_FORMAT target_format = DXGI_FORMAT_UNKNOWN;
+    D3D11_VIDEO_DECODER_DESC desc = { 0 };
+    D3D11_VIDEO_DECODER_CONFIG config;
+    HRESULT hr;
+    int surface_alignment, num_surfaces;
+    int ret;
+
+    AVD3D11VAFramesContext *frames_hwctx;
+    AVHWFramesContext *frames_ctx;
+
+    AVHWDeviceContext    *device_ctx;
+    AVD3D11VADeviceContext *device_hwctx;
+    device_ctx = (AVHWDeviceContext*)ctx->hw_device_ctx->data;
+    device_hwctx = device_ctx->hwctx;
+
+    guid_count = ID3D11VideoDevice_GetVideoDecoderProfileCount(device_hwctx->video_device);
+    guid_list = av_malloc(sizeof(*guid_list) * guid_count);
+    if (guid_list==NULL) {
+        av_log(NULL, loglevel, "Failed to allocate decoder device GUIDs\n");
+        goto fail;
+    }
+    for (i=0; i<guid_count; i++) {
+        hr = ID3D11VideoDevice_GetVideoDecoderProfile(device_hwctx->video_device, i, &guid_list[i]);
+        if (FAILED(hr)) {
+            av_log(NULL, loglevel, "Failed to retrieve decoder GUID %d\n", i);
+            goto fail;
+        }
+    }
+
+    for (i = 0; d3d11va_modes[i].guid; i++) {
+        BOOL is_supported = FALSE;
+        const d3d11va_mode *mode = &d3d11va_modes[i];
+        if (mode->codec != s->codec_id)
+            continue;
+
+        for (j = 0; j < guid_count; j++) {
+            if (IsEqualGUID(mode->guid, &guid_list[j]))
+                break;
+        }
+        if (j == guid_count)
+            continue;
+
+        hr = ID3D11VideoDevice_CheckVideoDecoderFormat(device_hwctx->video_device, mode->guid,
+                                                       surface_format, &is_supported);
+        if (SUCCEEDED(hr) && is_supported) {
+            target_format = surface_format;
+            device_guid = *mode->guid;
+            break;
+        }
+    }
+
+    if (IsEqualGUID(&device_guid, &GUID_NULL)) {
+        av_log(NULL, loglevel, "No decoder device for codec found\n");
+        goto fail;
+    }
+
+    desc.SampleWidth  = s->coded_width;
+    desc.SampleHeight = s->coded_height;
+    desc.OutputFormat = target_format;
+    desc.Guid         = device_guid;
+
+    ret = d3d11va_get_decoder_configuration(s, &desc, &config);
+    if (ret < 0) {
+        goto fail;
+    }
+
+    /* decoding MPEG-2 requires additional alignment on some Intel GPUs,
+       but it causes issues for H.264 on certain AMD GPUs..... */
+    if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO)
+        surface_alignment = 32;
+    /* the HEVC DXVA2 spec asks for 128 pixel aligned surfaces to ensure
+       all coding features have enough room to work with */
+    else if  (s->codec_id == AV_CODEC_ID_HEVC)
+        surface_alignment = 128;
+    else
+        surface_alignment = 16;
+
+    /* 4 base work surfaces */
+    num_surfaces = 4;
+
+    /* add surfaces based on number of possible refs */
+    if (s->codec_id == AV_CODEC_ID_H264 || s->codec_id == AV_CODEC_ID_HEVC)
+        num_surfaces += 16;
+    else if (s->codec_id == AV_CODEC_ID_VP9)
+        num_surfaces += 8;
+    else
+        num_surfaces += 2;
+
+    /* add extra surfaces for frame threading */
+    if (s->active_thread_type & FF_THREAD_FRAME)
+        num_surfaces += s->thread_count;
+
+    ctx->hw_frames_ctx = av_hwframe_ctx_alloc(ctx->hw_device_ctx);
+    if (!ctx->hw_frames_ctx)
+        goto fail;
+    frames_ctx   = (AVHWFramesContext*)ctx->hw_frames_ctx->data;
+    frames_hwctx = frames_ctx->hwctx;
+    
+    frames_ctx->format            = AV_PIX_FMT_D3D11VA_VLD;
+    frames_ctx->sw_format         = (target_format == DXGI_FORMAT_P010 ? AV_PIX_FMT_P010 : AV_PIX_FMT_NV12);
+    frames_ctx->width             = FFALIGN(s->coded_width, surface_alignment);
+    frames_ctx->height            = FFALIGN(s->coded_height, surface_alignment);
+    frames_ctx->initial_pool_size = num_surfaces;
+
+    hr = ID3D11VideoDevice_CreateVideoDecoder(device_hwctx->video_device, &desc,
+                                              &config, &frames_hwctx->decoder_to_release);
+    if (FAILED(hr)) {
+        av_log(NULL, loglevel, "Failed to create D3D11VA video decoder\n");
+        goto fail;
+    }
+
+    ret = av_hwframe_ctx_init(ctx->hw_frames_ctx);
+    if (ret < 0) {
+        av_log(NULL, loglevel, "Failed to initialize the HW frames context\n");
+        goto fail;
+    }
+
+    ctx->decoder_config = config;
+
+    dxva_ctx->cfg           = &ctx->decoder_config;
+    dxva_ctx->decoder       = frames_hwctx->decoder_to_release;
+    dxva_ctx->surface       = frames_hwctx->surfaces;
+    dxva_ctx->surface_count = frames_hwctx->nb_surfaces;
+    dxva_ctx->video_context = device_hwctx->video_context;
+
+    if (IsEqualGUID(&device_guid, &DXVADDI_Intel_ModeH264_E))
+        dxva_ctx->workaround |= FF_DXVA2_WORKAROUND_INTEL_CLEARVIDEO;
+
+    av_free(guid_list);
+    return 0;
+fail:
+    av_free(guid_list);
+    av_buffer_unref(&ctx->hw_frames_ctx);
+    return AVERROR(EINVAL);
+}
+
+int d3d11va_init(AVCodecContext *s)
+{
+    InputStream *ist = s->opaque;
+    int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
+    D3D11VAContext *ctx;
+    int ret;
+
+    if (!ist->hwaccel_ctx) {
+        ret = d3d11va_alloc(s);
+        if (ret < 0)
+            return ret;
+    }
+    ctx = ist->hwaccel_ctx;
+
+    if (s->codec_id == AV_CODEC_ID_H264 &&
+        (s->profile & ~FF_PROFILE_H264_CONSTRAINED) > FF_PROFILE_H264_HIGH) {
+        av_log(NULL, loglevel, "Unsupported H.264 profile for D3D11VA HWAccel: %d\n", s->profile);
+        return AVERROR(EINVAL);
+    }
+
+    if (s->codec_id == AV_CODEC_ID_HEVC &&
+        s->profile != FF_PROFILE_HEVC_MAIN && s->profile != FF_PROFILE_HEVC_MAIN_10) {
+        av_log(NULL, loglevel, "Unsupported HEVC profile for D3D11VA HWAccel: %d\n", s->profile);
+        return AVERROR(EINVAL);
+    }
+
+    av_buffer_unref(&ctx->hw_frames_ctx);
+
+    ret = d3d11va_create_decoder(s);
+    if (ret < 0) {
+        av_log(NULL, loglevel, "Error creating the D3D11VA decoder\n");
+        return ret;
+    }
+
+    return 0;
+}
diff --git a/ffmpeg_opt.c b/ffmpeg_opt.c
index 6862456..9cc1a55 100644
--- a/ffmpeg_opt.c
+++ b/ffmpeg_opt.c
@@ -69,6 +69,9 @@  const HWAccel hwaccels[] = {
 #if HAVE_VDPAU_X11
     { "vdpau", vdpau_init, HWACCEL_VDPAU, AV_PIX_FMT_VDPAU },
 #endif
+#if HAVE_D3D11VA_LIB
+    { "d3d11va", d3d11va_init, HWACCEL_D3D11VA, AV_PIX_FMT_D3D11VA_VLD },
+#endif
 #if HAVE_DXVA2_LIB
     { "dxva2", dxva2_init, HWACCEL_DXVA2, AV_PIX_FMT_DXVA2_VLD },
 #endif
diff --git a/libavutil/Makefile b/libavutil/Makefile
index 9841645..9b8ce22 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..e29dc67 100644
--- a/libavutil/hwcontext.h
+++ b/libavutil/hwcontext.h
@@ -28,6 +28,7 @@  enum AVHWDeviceType {
     AV_HWDEVICE_TYPE_VDPAU,
     AV_HWDEVICE_TYPE_CUDA,
     AV_HWDEVICE_TYPE_VAAPI,
+    AV_HWDEVICE_TYPE_D3D11VA,
     AV_HWDEVICE_TYPE_DXVA2,
     AV_HWDEVICE_TYPE_QSV,
 };
diff --git a/libavutil/hwcontext_d3d11va.c b/libavutil/hwcontext_d3d11va.c
new file mode 100644
index 0000000..6ac1019
--- /dev/null
+++ b/libavutil/hwcontext_d3d11va.c
@@ -0,0 +1,436 @@ 
+/*
+ * 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;
+} 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;
+
+    if (frames_hwctx->decoder_to_release)
+        ID3D11VideoDecoder_Release(frames_hwctx->decoder_to_release);
+
+    av_freep(&s->surfaces_internal);
+
+    if (frames_hwctx->staging_texture)
+        ID3D11Texture2D_Release(frames_hwctx->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;
+    ID3D11Texture2D *p_texture;
+    D3D11_VIDEO_DECODER_OUTPUT_VIEW_DESC viewDesc;
+    D3D11_VIDEO_DECODER_DESC decoderDesc;
+    D3D11_VIDEO_DECODER_CONFIG decoderConfig;
+
+    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);
+
+    ZeroMemory(&texDesc, sizeof(texDesc));
+    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;
+
+    ID3D11Device *d3d11_device;
+    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->decoder_to_release, &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;
+    }
+
+    ZeroMemory(&viewDesc, sizeof(viewDesc));
+    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;
+    hr = ID3D11Device_CreateTexture2D(d3d11_device, &texDesc, NULL, &frames_hwctx->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;
+    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);
+
+    ID3D11DeviceContext_CopySubresourceRegion(s->d3d11_context, (ID3D11Resource*)frames_hwctx->staging_texture,
+        0, 0, 0, 0,
+        (ID3D11Resource*)pTexture, surfaceDesc.Texture2D.ArraySlice,
+        NULL);
+    ID3D11Resource_Release(pTexture);
+
+    hr = ID3D11DeviceContext_Map(s->d3d11_context, (ID3D11Resource*)frames_hwctx->staging_texture,
+                                 0, D3D11_MAP_READ, 0, &LockedRect);
+    if (FAILED(hr)) {
+        av_log(ctx, AV_LOG_ERROR, "Unable to lock D3D11VA surface %lx\n", hr);
+        return AVERROR_UNKNOWN;
+    }
+
+    for (i = 0; download ? dst->data[i] : src->data[i]; i++)
+        surf_linesize[i] = LockedRect.RowPitch;
+
+    ID3D11Texture2D_GetDesc(frames_hwctx->staging_texture, &dstDesc);
+    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*)frames_hwctx->staging_texture, 0);
+
+    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 (priv->d3dlib)
+        dlclose(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;
+    UINT creationFlags = D3D11_CREATE_DEVICE_VIDEO_SUPPORT;
+    /* if the DirectX SDK is installed creationFlags |= D3D11_CREATE_DEVICE_DEBUG; */
+
+    if (device) {
+        HMODULE dxgilib = dlopen("dxgi.dll", 0);
+        if (dxgilib) {
+            PFN_CREATE_DXGI_FACTORY mCreateDXGIFactory;
+            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);
+                }
+            }
+            dlclose(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;
+    }
+
+    ID3D11Device        *d3d11_device;
+    ID3D11DeviceContext *d3d11_context;
+    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 (FAILED(hr)) {
+        av_log(ctx, AV_LOG_ERROR, "Failed to create Direct3D device %lx\n", hr);
+        return AVERROR_UNKNOWN;
+    }
+
+    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;
+    }
+
+    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..c3e4437
--- /dev/null
+++ b/libavutil/hwcontext_d3d11va.h
@@ -0,0 +1,74 @@ 
+/*
+ * 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;
+} 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.
+     */
+    ID3D11VideoDecoderOutputView **surfaces;
+    int                         nb_surfaces;
+
+    /**
+     * Certain drivers require the decoder to be destroyed before the surfaces.
+     * To allow internally managed pools to work properly in such cases, this
+     * field is provided.
+     *
+     * The decoder must be created before the surface pool.
+     *
+     * If it is non-NULL, libavutil will call ID3D11VideoDecoder_Release() on
+     * it just before the internal surface pool is freed.
+     */
+    ID3D11VideoDecoder  *decoder_to_release;
+    
+    /**
+     * Internal texture to get access to the decoded pixels from the CPU as the
+     * decoder texture needs D3D11_BIND_DECODER which forbdis CPU access.
+     */
+    ID3D11Texture2D     *staging_texture;
+} 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, \