On Wed, 4 Jan 2017 08:52:26 +0100
Steve Lhomme <rob...@gmail.com> wrote:
> On Fri, Dec 16, 2016 at 5:32 PM, wm4 <nfx...@googlemail.com> wrote:
> > On Fri, 16 Dec 2016 11:12:02 +0100
> > Steve Lhomme <rob...@gmail.com> wrote:
> >
> >> From: Steve Lhomme <rob...@gmail.com>
> >>
> >> ---
> >> libavutil/Makefile | 3 +
> >> libavutil/hwcontext.c | 3 +
> >> libavutil/hwcontext.h | 1 +
> >> libavutil/hwcontext_d3d11va.c | 457
> >> +++++++++++++++++++++++++++++++++++++++++
> >> libavutil/hwcontext_d3d11va.h | 81 ++++++++
> >> libavutil/hwcontext_internal.h | 1 +
> >> libavutil/version.h | 2 +-
> >> 7 files changed, 547 insertions(+), 1 deletion(-)
> >> create mode 100644 libavutil/hwcontext_d3d11va.c
> >> create mode 100644 libavutil/hwcontext_d3d11va.h
> >>
> >> 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..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..0618da3
> >> --- /dev/null
> >> +++ b/libavutil/hwcontext_d3d11va.c
> >> @@ -0,0 +1,457 @@
> >> +/*
> >> + * 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;
> >> + }
> >> +
> >> + if (frames_hwctx->dev_ctx_mutex != INVALID_HANDLE_VALUE)
> >> + ReleaseMutex(frames_hwctx->dev_ctx_mutex);
> >> +}
> >> +
> >> +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;
> >> + 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);
> >> +
> >> + 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;
> >> +
> >> + frames_hwctx->dev_ctx_mutex = CreateMutex(NULL, 0, NULL);
> >> + if (frames_hwctx->dev_ctx_mutex == INVALID_HANDLE_VALUE) {
> >> + av_log(ctx, AV_LOG_ERROR, "Failed to get a mutex for the D3D11VA
> >> decoder\n");
> >> + return AVERROR(EINVAL);
> >> + }
> >> +
> >> + 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 |
> >> D3D11_CPU_ACCESS_WRITE;
> >> + 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);
> >> + ID3D11Texture2D_GetDesc(frames_hwctx->staging_texture, &dstDesc);
> >> +
> >> + WaitForSingleObjectEx(frames_hwctx->dev_ctx_mutex, INFINITE, FALSE);
> >> +
> >> + 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, 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(frames_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*)frames_hwctx->staging_texture, 0);
> >> + ReleaseMutex(frames_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 (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;
> >> + ID3D11Device *d3d11_device;
> >> + ID3D11DeviceContext *d3d11_context;
> >> + ID3D10Multithread *pMultithread;
> >> + 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;
> >> + }
> >> +
> >> + 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 = 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;
> >> + }
> >> +
> >> + 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..e8d03f4
> >> --- /dev/null
> >> +++ b/libavutil/hwcontext_d3d11va.h
> >> @@ -0,0 +1,81 @@
> >> +/*
> >> + * 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.
> >> + * When it is provided the allocation/deallocation is up to the
> >> caller.
> >> + */
> >> + 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.
> >>
> >
> > Typo: forbids
> >
> >> + */
> >> + ID3D11Texture2D *staging_texture;
> >> +
> >> + /**
> >> + * Internal Mutex to avoid accessing the ID3D11DeviceContext from
> >> multiple
> >> + * threads simultaneously.
> >> + */
> >> + HANDLE dev_ctx_mutex;
> >> +} AVD3D11VAFramesContext;
> >
> > If this is internal, then why is it exposed here? Same could probably
> > be said about the staging texture.
> >
> > Also, I believe using AVMutex from libavutil/thread.h would be better,
> > because it can use fast userspace mutexes on Vista+. But probably
> > doesn't matter in this case.
>
> No because this mutex also needs to be used by the dxva decoder when
> using the D3D11 device/video context. And this is a public variable.
> In VLC we also have better things than a Mutex but since it's shared
> code with libavcodec we can't really have some advanced common ground.
OK, if the lavc API also uses a HANDLE mutex, fine I guess.
The doxygen shouldn't call it "internal" then, though.
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