git.sesse.net Git - ffmpeg/blob - libavutil/hwcontext_dxva2.c

   1 /*
   2  * This file is part of FFmpeg.
   3  *
   4  * FFmpeg is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * FFmpeg is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with FFmpeg; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #include <windows.h>
  20
  21 #if !defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0600
  22 #undef _WIN32_WINNT
  23 #define _WIN32_WINNT 0x0600
  24 #endif
  25 #define DXVA2API_USE_BITFIELDS
  26 #define COBJMACROS
  27
  28 #include <d3d9.h>
  29 #include <dxva2api.h>
  30 #include <initguid.h>
  31
  32 #include "avassert.h"
  33 #include "common.h"
  34 #include "hwcontext.h"
  35 #include "hwcontext_dxva2.h"
  36 #include "hwcontext_internal.h"
  37 #include "imgutils.h"
  38 #include "pixdesc.h"
  39 #include "pixfmt.h"
  40 #include "compat/w32dlfcn.h"
  41
  42 typedef IDirect3D9* WINAPI pDirect3DCreate9(UINT);
  43 typedef HRESULT WINAPI pDirect3DCreate9Ex(UINT, IDirect3D9Ex **);
  44 typedef HRESULT WINAPI pCreateDeviceManager9(UINT *, IDirect3DDeviceManager9 **);
  45
  46 #define FF_D3DCREATE_FLAGS (D3DCREATE_SOFTWARE_VERTEXPROCESSING | \
  47                             D3DCREATE_MULTITHREADED | \
  48                             D3DCREATE_FPU_PRESERVE)
  49
  50 static const D3DPRESENT_PARAMETERS dxva2_present_params = {
  51     .Windowed         = TRUE,
  52     .BackBufferWidth  = 640,
  53     .BackBufferHeight = 480,
  54     .BackBufferCount  = 0,
  55     .SwapEffect       = D3DSWAPEFFECT_DISCARD,
  56     .Flags            = D3DPRESENTFLAG_VIDEO,
  57 };
  58
  59 typedef struct DXVA2Mapping {
  60     uint32_t palette_dummy[256];
  61 } DXVA2Mapping;
  62
  63 typedef struct DXVA2FramesContext {
  64     IDirect3DSurface9 **surfaces_internal;
  65     int              nb_surfaces_used;
  66
  67     HANDLE  device_handle;
  68     IDirectXVideoAccelerationService *service;
  69
  70     D3DFORMAT format;
  71 } DXVA2FramesContext;
  72
  73 typedef struct DXVA2DevicePriv {
  74     HMODULE d3dlib;
  75     HMODULE dxva2lib;
  76
  77     HANDLE device_handle;
  78
  79     IDirect3D9       *d3d9;
  80     IDirect3DDevice9 *d3d9device;
  81 } DXVA2DevicePriv;
  82
  83 static const struct {
  84     D3DFORMAT d3d_format;
  85     enum AVPixelFormat pix_fmt;
  86 } supported_formats[] = {
  87     { MKTAG('N', 'V', '1', '2'), AV_PIX_FMT_NV12 },
  88     { MKTAG('P', '0', '1', '0'), AV_PIX_FMT_P010 },
  89     { D3DFMT_P8,                 AV_PIX_FMT_PAL8 },
  90 };
  91
  92 DEFINE_GUID(video_decoder_service,   0xfc51a551, 0xd5e7, 0x11d9, 0xaf, 0x55, 0x00, 0x05, 0x4e, 0x43, 0xff, 0x02);
  93 DEFINE_GUID(video_processor_service, 0xfc51a552, 0xd5e7, 0x11d9, 0xaf, 0x55, 0x00, 0x05, 0x4e, 0x43, 0xff, 0x02);
  94
  95 static void dxva2_frames_uninit(AVHWFramesContext *ctx)
  96 {
  97     AVDXVA2DeviceContext *device_hwctx = ctx->device_ctx->hwctx;
  98     AVDXVA2FramesContext *frames_hwctx = ctx->hwctx;
  99     DXVA2FramesContext *s = ctx->internal->priv;
 100     int i;
 101
 102     if (frames_hwctx->decoder_to_release)
 103         IDirectXVideoDecoder_Release(frames_hwctx->decoder_to_release);
 104
 105     if (s->surfaces_internal) {
 106         for (i = 0; i < frames_hwctx->nb_surfaces; i++) {
 107             if (s->surfaces_internal[i])
 108                 IDirect3DSurface9_Release(s->surfaces_internal[i]);
 109         }
 110     }
 111     av_freep(&s->surfaces_internal);
 112
 113     if (s->service) {
 114         IDirectXVideoAccelerationService_Release(s->service);
 115         s->service = NULL;
 116     }
 117
 118     if (s->device_handle != INVALID_HANDLE_VALUE) {
 119         IDirect3DDeviceManager9_CloseDeviceHandle(device_hwctx->devmgr, s->device_handle);
 120         s->device_handle = INVALID_HANDLE_VALUE;
 121     }
 122 }
 123
 124 static AVBufferRef *dxva2_pool_alloc(void *opaque, int size)
 125 {
 126     AVHWFramesContext      *ctx = (AVHWFramesContext*)opaque;
 127     DXVA2FramesContext       *s = ctx->internal->priv;
 128     AVDXVA2FramesContext *hwctx = ctx->hwctx;
 129
 130     if (s->nb_surfaces_used < hwctx->nb_surfaces) {
 131         s->nb_surfaces_used++;
 132         return av_buffer_create((uint8_t*)s->surfaces_internal[s->nb_surfaces_used - 1],
 133                                 sizeof(*hwctx->surfaces), NULL, 0, 0);
 134     }
 135
 136     return NULL;
 137 }
 138
 139 static int dxva2_init_pool(AVHWFramesContext *ctx)
 140 {
 141     AVDXVA2FramesContext *frames_hwctx = ctx->hwctx;
 142     AVDXVA2DeviceContext *device_hwctx = ctx->device_ctx->hwctx;
 143     DXVA2FramesContext              *s = ctx->internal->priv;
 144     int decode = (frames_hwctx->surface_type == DXVA2_VideoDecoderRenderTarget);
 145
 146     int i;
 147     HRESULT hr;
 148
 149     if (ctx->initial_pool_size <= 0)
 150         return 0;
 151
 152     hr = IDirect3DDeviceManager9_OpenDeviceHandle(device_hwctx->devmgr, &s->device_handle);
 153     if (FAILED(hr)) {
 154         av_log(ctx, AV_LOG_ERROR, "Failed to open device handle\n");
 155         return AVERROR_UNKNOWN;
 156     }
 157
 158     hr = IDirect3DDeviceManager9_GetVideoService(device_hwctx->devmgr,
 159                                                  s->device_handle,
 160                                                  decode ? &video_decoder_service : &video_processor_service,
 161                                                  (void **)&s->service);
 162     if (FAILED(hr)) {
 163         av_log(ctx, AV_LOG_ERROR, "Failed to create the video service\n");
 164         return AVERROR_UNKNOWN;
 165     }
 166
 167     for (i = 0; i < FF_ARRAY_ELEMS(supported_formats); i++) {
 168         if (ctx->sw_format == supported_formats[i].pix_fmt) {
 169             s->format = supported_formats[i].d3d_format;
 170             break;
 171         }
 172     }
 173     if (i == FF_ARRAY_ELEMS(supported_formats)) {
 174         av_log(ctx, AV_LOG_ERROR, "Unsupported pixel format: %s\n",
 175                av_get_pix_fmt_name(ctx->sw_format));
 176         return AVERROR(EINVAL);
 177     }
 178
 179     s->surfaces_internal = av_mallocz_array(ctx->initial_pool_size,
 180                                             sizeof(*s->surfaces_internal));
 181     if (!s->surfaces_internal)
 182         return AVERROR(ENOMEM);
 183
 184     hr = IDirectXVideoAccelerationService_CreateSurface(s->service,
 185                                                         ctx->width, ctx->height,
 186                                                         ctx->initial_pool_size - 1,
 187                                                         s->format, D3DPOOL_DEFAULT, 0,
 188                                                         frames_hwctx->surface_type,
 189                                                         s->surfaces_internal, NULL);
 190     if (FAILED(hr)) {
 191         av_log(ctx, AV_LOG_ERROR, "Could not create the surfaces\n");
 192         return AVERROR_UNKNOWN;
 193     }
 194
 195     ctx->internal->pool_internal = av_buffer_pool_init2(sizeof(*s->surfaces_internal),
 196                                                         ctx, dxva2_pool_alloc, NULL);
 197     if (!ctx->internal->pool_internal)
 198         return AVERROR(ENOMEM);
 199
 200     frames_hwctx->surfaces    = s->surfaces_internal;
 201     frames_hwctx->nb_surfaces = ctx->initial_pool_size;
 202
 203     return 0;
 204 }
 205
 206 static int dxva2_frames_init(AVHWFramesContext *ctx)
 207 {
 208     AVDXVA2FramesContext *hwctx = ctx->hwctx;
 209     DXVA2FramesContext       *s = ctx->internal->priv;
 210     int ret;
 211
 212     if (hwctx->surface_type != DXVA2_VideoDecoderRenderTarget &&
 213         hwctx->surface_type != DXVA2_VideoProcessorRenderTarget) {
 214         av_log(ctx, AV_LOG_ERROR, "Unknown surface type: %lu\n",
 215                hwctx->surface_type);
 216         return AVERROR(EINVAL);
 217     }
 218
 219     s->device_handle = INVALID_HANDLE_VALUE;
 220
 221     /* init the frame pool if the caller didn't provide one */
 222     if (!ctx->pool) {
 223         ret = dxva2_init_pool(ctx);
 224         if (ret < 0) {
 225             av_log(ctx, AV_LOG_ERROR, "Error creating an internal frame pool\n");
 226             return ret;
 227         }
 228     }
 229
 230     return 0;
 231 }
 232
 233 static int dxva2_get_buffer(AVHWFramesContext *ctx, AVFrame *frame)
 234 {
 235     frame->buf[0] = av_buffer_pool_get(ctx->pool);
 236     if (!frame->buf[0])
 237         return AVERROR(ENOMEM);
 238
 239     frame->data[3] = frame->buf[0]->data;
 240     frame->format  = AV_PIX_FMT_DXVA2_VLD;
 241     frame->width   = ctx->width;
 242     frame->height  = ctx->height;
 243
 244     return 0;
 245 }
 246
 247 static int dxva2_transfer_get_formats(AVHWFramesContext *ctx,
 248                                       enum AVHWFrameTransferDirection dir,
 249                                       enum AVPixelFormat **formats)
 250 {
 251     enum AVPixelFormat *fmts;
 252
 253     fmts = av_malloc_array(2, sizeof(*fmts));
 254     if (!fmts)
 255         return AVERROR(ENOMEM);
 256
 257     fmts[0] = ctx->sw_format;
 258     fmts[1] = AV_PIX_FMT_NONE;
 259
 260     *formats = fmts;
 261
 262     return 0;
 263 }
 264
 265 static void dxva2_unmap_frame(AVHWFramesContext *ctx, HWMapDescriptor *hwmap)
 266 {
 267     IDirect3DSurface9 *surface = (IDirect3DSurface9*)hwmap->source->data[3];
 268     IDirect3DSurface9_UnlockRect(surface);
 269     av_freep(&hwmap->priv);
 270 }
 271
 272 static int dxva2_map_frame(AVHWFramesContext *ctx, AVFrame *dst, const AVFrame *src,
 273                            int flags)
 274 {
 275     IDirect3DSurface9 *surface = (IDirect3DSurface9*)src->data[3];
 276     DXVA2Mapping      *map;
 277     D3DSURFACE_DESC    surfaceDesc;
 278     D3DLOCKED_RECT     LockedRect;
 279     HRESULT            hr;
 280     int i, err, nb_planes;
 281     int lock_flags = 0;
 282
 283     nb_planes = av_pix_fmt_count_planes(dst->format);
 284
 285     hr = IDirect3DSurface9_GetDesc(surface, &surfaceDesc);
 286     if (FAILED(hr)) {
 287         av_log(ctx, AV_LOG_ERROR, "Error getting a surface description\n");
 288         return AVERROR_UNKNOWN;
 289     }
 290
 291     if (!(flags & AV_HWFRAME_MAP_WRITE))
 292         lock_flags |= D3DLOCK_READONLY;
 293     if (flags & AV_HWFRAME_MAP_OVERWRITE)
 294         lock_flags |= D3DLOCK_DISCARD;
 295
 296     hr = IDirect3DSurface9_LockRect(surface, &LockedRect, NULL, lock_flags);
 297     if (FAILED(hr)) {
 298         av_log(ctx, AV_LOG_ERROR, "Unable to lock DXVA2 surface\n");
 299         return AVERROR_UNKNOWN;
 300     }
 301
 302     map = av_mallocz(sizeof(*map));
 303     if (!map)
 304         goto fail;
 305
 306     err = ff_hwframe_map_create(src->hw_frames_ctx, dst, src,
 307                                 dxva2_unmap_frame, map);
 308     if (err < 0) {
 309         av_freep(&map);
 310         goto fail;
 311     }
 312
 313     for (i = 0; i < nb_planes; i++)
 314         dst->linesize[i] = LockedRect.Pitch;
 315
 316     av_image_fill_pointers(dst->data, dst->format, surfaceDesc.Height,
 317                            (uint8_t*)LockedRect.pBits, dst->linesize);
 318
 319     if (dst->format == AV_PIX_FMT_PAL8)
 320         dst->data[1] = (uint8_t*)map->palette_dummy;
 321
 322     return 0;
 323 fail:
 324     IDirect3DSurface9_UnlockRect(surface);
 325     return err;
 326 }
 327
 328 static int dxva2_transfer_data_to(AVHWFramesContext *ctx, AVFrame *dst,
 329                                   const AVFrame *src)
 330 {
 331     AVFrame *map;
 332     int ret;
 333
 334     if (src->format != ctx->sw_format)
 335         return AVERROR(ENOSYS);
 336
 337     map = av_frame_alloc();
 338     if (!map)
 339         return AVERROR(ENOMEM);
 340     map->format = dst->format;
 341
 342     ret = dxva2_map_frame(ctx, map, dst, AV_HWFRAME_MAP_WRITE | AV_HWFRAME_MAP_OVERWRITE);
 343     if (ret < 0)
 344         goto fail;
 345
 346     av_image_copy(map->data, map->linesize, src->data, src->linesize,
 347                   ctx->sw_format, src->width, src->height);
 348
 349 fail:
 350     av_frame_free(&map);
 351     return ret;
 352 }
 353
 354 static int dxva2_transfer_data_from(AVHWFramesContext *ctx, AVFrame *dst,
 355                                     const AVFrame *src)
 356 {
 357     AVFrame *map;
 358     ptrdiff_t src_linesize[4], dst_linesize[4];
 359     int ret, i;
 360
 361     if (dst->format != ctx->sw_format)
 362         return AVERROR(ENOSYS);
 363
 364     map = av_frame_alloc();
 365     if (!map)
 366         return AVERROR(ENOMEM);
 367     map->format = dst->format;
 368
 369     ret = dxva2_map_frame(ctx, map, src, AV_HWFRAME_MAP_READ);
 370     if (ret < 0)
 371         goto fail;
 372
 373     for (i = 0; i < 4; i++) {
 374         dst_linesize[i] = dst->linesize[i];
 375         src_linesize[i] = map->linesize[i];
 376     }
 377     av_image_copy_uc_from(dst->data, dst_linesize, map->data, src_linesize,
 378                           ctx->sw_format, src->width, src->height);
 379 fail:
 380     av_frame_free(&map);
 381     return ret;
 382 }
 383
 384 static int dxva2_map_from(AVHWFramesContext *ctx,
 385                           AVFrame *dst, const AVFrame *src, int flags)
 386 {
 387     int err;
 388
 389     if (dst->format != AV_PIX_FMT_NONE && dst->format != ctx->sw_format)
 390         return AVERROR(ENOSYS);
 391     dst->format = ctx->sw_format;
 392
 393     err = dxva2_map_frame(ctx, dst, src, flags);
 394     if (err < 0)
 395         return err;
 396
 397     err = av_frame_copy_props(dst, src);
 398     if (err < 0)
 399         return err;
 400
 401     return 0;
 402 }
 403
 404 static void dxva2_device_free(AVHWDeviceContext *ctx)
 405 {
 406     AVDXVA2DeviceContext *hwctx = ctx->hwctx;
 407     DXVA2DevicePriv       *priv = ctx->user_opaque;
 408
 409     if (hwctx->devmgr && priv->device_handle != INVALID_HANDLE_VALUE)
 410         IDirect3DDeviceManager9_CloseDeviceHandle(hwctx->devmgr, priv->device_handle);
 411
 412     if (hwctx->devmgr)
 413         IDirect3DDeviceManager9_Release(hwctx->devmgr);
 414
 415     if (priv->d3d9device)
 416         IDirect3DDevice9_Release(priv->d3d9device);
 417
 418     if (priv->d3d9)
 419         IDirect3D9_Release(priv->d3d9);
 420
 421     if (priv->d3dlib)
 422         dlclose(priv->d3dlib);
 423
 424     if (priv->dxva2lib)
 425         dlclose(priv->dxva2lib);
 426
 427     av_freep(&ctx->user_opaque);
 428 }
 429
 430 static int dxva2_device_create9(AVHWDeviceContext *ctx, UINT adapter)
 431 {
 432     DXVA2DevicePriv *priv = ctx->user_opaque;
 433     D3DPRESENT_PARAMETERS d3dpp = dxva2_present_params;
 434     D3DDISPLAYMODE d3ddm;
 435     HRESULT hr;
 436     pDirect3DCreate9 *createD3D = (pDirect3DCreate9 *)dlsym(priv->d3dlib, "Direct3DCreate9");
 437     if (!createD3D) {
 438         av_log(ctx, AV_LOG_ERROR, "Failed to locate Direct3DCreate9\n");
 439         return AVERROR_UNKNOWN;
 440     }
 441
 442     priv->d3d9 = createD3D(D3D_SDK_VERSION);
 443     if (!priv->d3d9) {
 444         av_log(ctx, AV_LOG_ERROR, "Failed to create IDirect3D object\n");
 445         return AVERROR_UNKNOWN;
 446     }
 447
 448     IDirect3D9_GetAdapterDisplayMode(priv->d3d9, adapter, &d3ddm);
 449
 450     d3dpp.BackBufferFormat = d3ddm.Format;
 451
 452     hr = IDirect3D9_CreateDevice(priv->d3d9, adapter, D3DDEVTYPE_HAL, GetDesktopWindow(),
 453                                  FF_D3DCREATE_FLAGS,
 454                                  &d3dpp, &priv->d3d9device);
 455     if (FAILED(hr)) {
 456         av_log(ctx, AV_LOG_ERROR, "Failed to create Direct3D device\n");
 457         return AVERROR_UNKNOWN;
 458     }
 459
 460     return 0;
 461 }
 462
 463 static int dxva2_device_create9ex(AVHWDeviceContext *ctx, UINT adapter)
 464 {
 465     DXVA2DevicePriv *priv = ctx->user_opaque;
 466     D3DPRESENT_PARAMETERS d3dpp = dxva2_present_params;
 467     D3DDISPLAYMODEEX modeex = {0};
 468     IDirect3D9Ex *d3d9ex = NULL;
 469     IDirect3DDevice9Ex *exdev = NULL;
 470     HRESULT hr;
 471     pDirect3DCreate9Ex *createD3DEx = (pDirect3DCreate9Ex *)dlsym(priv->d3dlib, "Direct3DCreate9Ex");
 472     if (!createD3DEx)
 473         return AVERROR(ENOSYS);
 474
 475     hr = createD3DEx(D3D_SDK_VERSION, &d3d9ex);
 476     if (FAILED(hr))
 477         return AVERROR_UNKNOWN;
 478
 479     IDirect3D9Ex_GetAdapterDisplayModeEx(d3d9ex, adapter, &modeex, NULL);
 480
 481     d3dpp.BackBufferFormat = modeex.Format;
 482
 483     hr = IDirect3D9Ex_CreateDeviceEx(d3d9ex, adapter, D3DDEVTYPE_HAL, GetDesktopWindow(),
 484                                      FF_D3DCREATE_FLAGS,
 485                                      &d3dpp, NULL, &exdev);
 486     if (FAILED(hr)) {
 487         IDirect3D9Ex_Release(d3d9ex);
 488         return AVERROR_UNKNOWN;
 489     }
 490
 491     av_log(ctx, AV_LOG_VERBOSE, "Using D3D9Ex device.\n");
 492     priv->d3d9 = (IDirect3D9 *)d3d9ex;
 493     priv->d3d9device = (IDirect3DDevice9 *)exdev;
 494     return 0;
 495 }
 496
 497 static int dxva2_device_create(AVHWDeviceContext *ctx, const char *device,
 498                                AVDictionary *opts, int flags)
 499 {
 500     AVDXVA2DeviceContext *hwctx = ctx->hwctx;
 501     DXVA2DevicePriv *priv;
 502     pCreateDeviceManager9 *createDeviceManager = NULL;
 503     unsigned resetToken = 0;
 504     UINT adapter = D3DADAPTER_DEFAULT;
 505     HRESULT hr;
 506     int err;
 507
 508     if (device)
 509         adapter = atoi(device);
 510
 511     priv = av_mallocz(sizeof(*priv));
 512     if (!priv)
 513         return AVERROR(ENOMEM);
 514
 515     ctx->user_opaque = priv;
 516     ctx->free        = dxva2_device_free;
 517
 518     priv->device_handle = INVALID_HANDLE_VALUE;
 519
 520     priv->d3dlib = dlopen("d3d9.dll", 0);
 521     if (!priv->d3dlib) {
 522         av_log(ctx, AV_LOG_ERROR, "Failed to load D3D9 library\n");
 523         return AVERROR_UNKNOWN;
 524     }
 525     priv->dxva2lib = dlopen("dxva2.dll", 0);
 526     if (!priv->dxva2lib) {
 527         av_log(ctx, AV_LOG_ERROR, "Failed to load DXVA2 library\n");
 528         return AVERROR_UNKNOWN;
 529     }
 530
 531     createDeviceManager = (pCreateDeviceManager9 *)dlsym(priv->dxva2lib,
 532                                                          "DXVA2CreateDirect3DDeviceManager9");
 533     if (!createDeviceManager) {
 534         av_log(ctx, AV_LOG_ERROR, "Failed to locate DXVA2CreateDirect3DDeviceManager9\n");
 535         return AVERROR_UNKNOWN;
 536     }
 537
 538     if (dxva2_device_create9ex(ctx, adapter) < 0) {
 539         // Retry with "classic" d3d9
 540         err = dxva2_device_create9(ctx, adapter);
 541         if (err < 0)
 542             return err;
 543     }
 544
 545     hr = createDeviceManager(&resetToken, &hwctx->devmgr);
 546     if (FAILED(hr)) {
 547         av_log(ctx, AV_LOG_ERROR, "Failed to create Direct3D device manager\n");
 548         return AVERROR_UNKNOWN;
 549     }
 550
 551     hr = IDirect3DDeviceManager9_ResetDevice(hwctx->devmgr, priv->d3d9device, resetToken);
 552     if (FAILED(hr)) {
 553         av_log(ctx, AV_LOG_ERROR, "Failed to bind Direct3D device to device manager\n");
 554         return AVERROR_UNKNOWN;
 555     }
 556
 557     hr = IDirect3DDeviceManager9_OpenDeviceHandle(hwctx->devmgr, &priv->device_handle);
 558     if (FAILED(hr)) {
 559         av_log(ctx, AV_LOG_ERROR, "Failed to open device handle\n");
 560         return AVERROR_UNKNOWN;
 561     }
 562
 563     return 0;
 564 }
 565
 566 const HWContextType ff_hwcontext_type_dxva2 = {
 567     .type                 = AV_HWDEVICE_TYPE_DXVA2,
 568     .name                 = "DXVA2",
 569
 570     .device_hwctx_size    = sizeof(AVDXVA2DeviceContext),
 571     .frames_hwctx_size    = sizeof(AVDXVA2FramesContext),
 572     .frames_priv_size     = sizeof(DXVA2FramesContext),
 573
 574     .device_create        = dxva2_device_create,
 575     .frames_init          = dxva2_frames_init,
 576     .frames_uninit        = dxva2_frames_uninit,
 577     .frames_get_buffer    = dxva2_get_buffer,
 578     .transfer_get_formats = dxva2_transfer_get_formats,
 579     .transfer_data_to     = dxva2_transfer_data_to,
 580     .transfer_data_from   = dxva2_transfer_data_from,
 581     .map_from             = dxva2_map_from,
 582
 583     .pix_fmts             = (const enum AVPixelFormat[]){ AV_PIX_FMT_DXVA2_VLD, AV_PIX_FMT_NONE },
 584 };