avconv_dxva2.c

   1 /*
   2  * This file is part of Libav.
   3  *
   4  * Libav 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  * Libav 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 Libav; 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 #ifdef _WIN32_WINNT
  22 #undef _WIN32_WINNT
  23 #endif
  24 #define _WIN32_WINNT 0x0600
  25 #define DXVA2API_USE_BITFIELDS
  26 #define COBJMACROS
  27
  28 #include <stdint.h>
  29
  30 /* initguid.h needs to be above d3d/dxva to ensure
  31    the GUIDs are initialized properly */
  32 #include <initguid.h>
  33
  34 #include <d3d9.h>
  35 #include <dxva2api.h>
  36
  37 #include "avconv.h"
  38
  39 #include "libavcodec/dxva2.h"
  40
  41 #include "libavutil/avassert.h"
  42 #include "libavutil/buffer.h"
  43 #include "libavutil/frame.h"
  44 #include "libavutil/imgutils.h"
  45 #include "libavutil/pixfmt.h"
  46
  47 typedef IDirect3D9* WINAPI pDirect3DCreate9(UINT);
  48 typedef HRESULT WINAPI pCreateDeviceManager9(UINT *, IDirect3DDeviceManager9 **);
  49
  50 /* GUIDs not defined in the common dxva2api.h in mingw-w64 */
  51 #ifndef _MSC_VER
  52 DEFINE_GUID(DXVA2_ModeMPEG2and1_VLD, 0x86695f12, 0x340e,0x4f04,0x9f,0xd3,0x92,0x53,0xdd,0x32,0x74,0x60);
  53 DEFINE_GUID(DXVA2_ModeVC1_D2010,     0x1b81beA4, 0xa0c7,0x11d3,0xb9,0x84,0x00,0xc0,0x4f,0x2e,0x73,0xc5);
  54 DEFINE_GUID(DXVA2_NoEncrypt,         0x1b81beD0, 0xa0c7,0x11d3,0xb9,0x84,0x00,0xc0,0x4f,0x2e,0x73,0xc5);
  55 #endif
  56
  57 DEFINE_GUID(DXVADDI_Intel_ModeH264_E, 0x604F8E68, 0x4951,0x4C54,0x88,0xFE,0xAB,0xD2,0x5C,0x15,0xB3,0xD6);
  58 DEFINE_GUID(GUID_NULL,                0x00000000, 0x0000,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00);
  59
  60 typedef struct dxva2_mode {
  61   const GUID     *guid;
  62   enum AVCodecID codec;
  63 } dxva2_mode;
  64
  65 static const dxva2_mode dxva2_modes[] = {
  66     /* MPEG-2 */
  67     { &DXVA2_ModeMPEG2_VLD,      AV_CODEC_ID_MPEG2VIDEO },
  68     { &DXVA2_ModeMPEG2and1_VLD,  AV_CODEC_ID_MPEG2VIDEO },
  69
  70     /* H.264 */
  71     { &DXVA2_ModeH264_F,         AV_CODEC_ID_H264 },
  72     { &DXVA2_ModeH264_E,         AV_CODEC_ID_H264 },
  73     /* Intel specific H.264 mode */
  74     { &DXVADDI_Intel_ModeH264_E, AV_CODEC_ID_H264 },
  75
  76     /* VC-1 / WMV3 */
  77     { &DXVA2_ModeVC1_D2010,      AV_CODEC_ID_VC1  },
  78     { &DXVA2_ModeVC1_D2010,      AV_CODEC_ID_WMV3 },
  79     { &DXVA2_ModeVC1_D,          AV_CODEC_ID_VC1  },
  80     { &DXVA2_ModeVC1_D,          AV_CODEC_ID_WMV3 },
  81
  82     { NULL,                      0 },
  83 };
  84
  85 typedef struct surface_info {
  86     int used;
  87     uint64_t age;
  88 } surface_info;
  89
  90 typedef struct DXVA2Context {
  91     HMODULE d3dlib;
  92     HMODULE dxva2lib;
  93
  94     HANDLE  deviceHandle;
  95
  96     IDirect3D9                  *d3d9;
  97     IDirect3DDevice9            *d3d9device;
  98     IDirect3DDeviceManager9     *d3d9devmgr;
  99     IDirectXVideoDecoderService *decoder_service;
 100     IDirectXVideoDecoder        *decoder;
 101
 102     GUID                        decoder_guid;
 103     DXVA2_ConfigPictureDecode   decoder_config;
 104
 105     LPDIRECT3DSURFACE9          *surfaces;
 106     surface_info                *surface_infos;
 107     uint32_t                    num_surfaces;
 108     uint64_t                    surface_age;
 109
 110     AVFrame                     *tmp_frame;
 111 } DXVA2Context;
 112
 113 typedef struct DXVA2SurfaceWrapper {
 114     DXVA2Context         *ctx;
 115     LPDIRECT3DSURFACE9   surface;
 116     IDirectXVideoDecoder *decoder;
 117 } DXVA2SurfaceWrapper;
 118
 119 static void dxva2_destroy_decoder(AVCodecContext *s)
 120 {
 121     InputStream  *ist = s->opaque;
 122     DXVA2Context *ctx = ist->hwaccel_ctx;
 123
 124     if (ctx->surfaces) {
 125         for (int i = 0; i < ctx->num_surfaces; i++) {
 126             if (ctx->surfaces[i])
 127                 IDirect3DSurface9_Release(ctx->surfaces[i]);
 128         }
 129     }
 130     av_freep(&ctx->surfaces);
 131     av_freep(&ctx->surface_infos);
 132     ctx->num_surfaces = 0;
 133     ctx->surface_age  = 0;
 134
 135     if (ctx->decoder) {
 136         IDirectXVideoDecoder_Release(ctx->decoder);
 137         ctx->decoder = NULL;
 138     }
 139 }
 140
 141 static void dxva2_uninit(AVCodecContext *s)
 142 {
 143     InputStream  *ist = s->opaque;
 144     DXVA2Context *ctx = ist->hwaccel_ctx;
 145
 146     ist->hwaccel_uninit        = NULL;
 147     ist->hwaccel_get_buffer    = NULL;
 148     ist->hwaccel_retrieve_data = NULL;
 149
 150     if (ctx->decoder)
 151         dxva2_destroy_decoder(s);
 152
 153     if (ctx->decoder_service)
 154         IDirectXVideoDecoderService_Release(ctx->decoder_service);
 155
 156     if (ctx->d3d9devmgr && ctx->deviceHandle != INVALID_HANDLE_VALUE)
 157         IDirect3DDeviceManager9_CloseDeviceHandle(ctx->d3d9devmgr, ctx->deviceHandle);
 158
 159     if (ctx->d3d9devmgr)
 160         IDirect3DDeviceManager9_Release(ctx->d3d9devmgr);
 161
 162     if (ctx->d3d9device)
 163         IDirect3DDevice9_Release(ctx->d3d9device);
 164
 165     if (ctx->d3d9)
 166         IDirect3D9_Release(ctx->d3d9);
 167
 168     if (ctx->d3dlib)
 169         FreeLibrary(ctx->d3dlib);
 170
 171     if (ctx->dxva2lib)
 172         FreeLibrary(ctx->dxva2lib);
 173
 174     av_frame_free(&ctx->tmp_frame);
 175
 176     av_freep(&ist->hwaccel_ctx);
 177     av_freep(&s->hwaccel_context);
 178 }
 179
 180 static void dxva2_release_buffer(void *opaque, uint8_t *data)
 181 {
 182     DXVA2SurfaceWrapper *w   = opaque;
 183     DXVA2Context        *ctx = w->ctx;
 184     int i;
 185
 186     for (i = 0; i < ctx->num_surfaces; i++) {
 187         if (ctx->surfaces[i] == w->surface) {
 188             ctx->surface_infos[i].used = 0;
 189             break;
 190         }
 191     }
 192     IDirect3DSurface9_Release(w->surface);
 193     IDirectXVideoDecoder_Release(w->decoder);
 194     av_free(w);
 195 }
 196
 197 static int dxva2_get_buffer(AVCodecContext *s, AVFrame *frame, int flags)
 198 {
 199     InputStream  *ist = s->opaque;
 200     DXVA2Context *ctx = ist->hwaccel_ctx;
 201     int i, old_unused = -1;
 202     LPDIRECT3DSURFACE9 surface;
 203     DXVA2SurfaceWrapper *w = NULL;
 204
 205     av_assert0(frame->format == AV_PIX_FMT_DXVA2_VLD);
 206
 207     for (i = 0; i < ctx->num_surfaces; i++) {
 208         surface_info *info = &ctx->surface_infos[i];
 209         if (!info->used && (old_unused == -1 || info->age < ctx->surface_infos[old_unused].age))
 210             old_unused = i;
 211     }
 212     if (old_unused == -1) {
 213         av_log(NULL, AV_LOG_ERROR, "No free DXVA2 surface!\n");
 214         return AVERROR(ENOMEM);
 215     }
 216     i = old_unused;
 217
 218     surface = ctx->surfaces[i];
 219
 220     w = av_mallocz(sizeof(*w));
 221     if (!w)
 222         return AVERROR(ENOMEM);
 223
 224     frame->buf[0] = av_buffer_create((uint8_t*)surface, 0,
 225                                      dxva2_release_buffer, w,
 226                                      AV_BUFFER_FLAG_READONLY);
 227     if (!frame->buf[0]) {
 228         av_free(w);
 229         return AVERROR(ENOMEM);
 230     }
 231
 232     w->ctx     = ctx;
 233     w->surface = surface;
 234     IDirect3DSurface9_AddRef(w->surface);
 235     w->decoder = ctx->decoder;
 236     IDirectXVideoDecoder_AddRef(w->decoder);
 237
 238     ctx->surface_infos[i].used = 1;
 239     ctx->surface_infos[i].age  = ctx->surface_age++;
 240
 241     frame->data[3] = (uint8_t *)surface;
 242
 243     return 0;
 244 }
 245
 246 static int dxva2_retrieve_data(AVCodecContext *s, AVFrame *frame)
 247 {
 248     LPDIRECT3DSURFACE9 surface =  (LPDIRECT3DSURFACE9)frame->data[3];
 249     InputStream        *ist = s->opaque;
 250     DXVA2Context       *ctx = ist->hwaccel_ctx;
 251     D3DSURFACE_DESC    surfaceDesc;
 252     D3DLOCKED_RECT     LockedRect;
 253     HRESULT            hr;
 254     int                ret;
 255
 256     IDirect3DSurface9_GetDesc(surface, &surfaceDesc);
 257
 258     ctx->tmp_frame->width  = frame->width;
 259     ctx->tmp_frame->height = frame->height;
 260     ctx->tmp_frame->format = AV_PIX_FMT_NV12;
 261
 262     ret = av_frame_get_buffer(ctx->tmp_frame, 32);
 263     if (ret < 0)
 264         return ret;
 265
 266     hr = IDirect3DSurface9_LockRect(surface, &LockedRect, NULL, D3DLOCK_READONLY);
 267     if (FAILED(hr)) {
 268         av_log(NULL, AV_LOG_ERROR, "Unable to lock DXVA2 surface\n");
 269         return AVERROR_UNKNOWN;
 270     }
 271
 272     av_image_copy_plane(ctx->tmp_frame->data[0], ctx->tmp_frame->linesize[0],
 273                         (uint8_t*)LockedRect.pBits,
 274                         LockedRect.Pitch, frame->width, frame->height);
 275
 276     av_image_copy_plane(ctx->tmp_frame->data[1], ctx->tmp_frame->linesize[1],
 277                         (uint8_t*)LockedRect.pBits + LockedRect.Pitch * surfaceDesc.Height,
 278                         LockedRect.Pitch, frame->width, frame->height / 2);
 279
 280     IDirect3DSurface9_UnlockRect(surface);
 281
 282     ret = av_frame_copy_props(ctx->tmp_frame, frame);
 283     if (ret < 0)
 284         goto fail;
 285
 286     av_frame_unref(frame);
 287     av_frame_move_ref(frame, ctx->tmp_frame);
 288
 289     return 0;
 290 fail:
 291     av_frame_unref(ctx->tmp_frame);
 292     return ret;
 293 }
 294
 295 static int dxva2_alloc(AVCodecContext *s)
 296 {
 297     InputStream  *ist = s->opaque;
 298     int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
 299     DXVA2Context *ctx;
 300     pDirect3DCreate9      *createD3D = NULL;
 301     pCreateDeviceManager9 *createDeviceManager = NULL;
 302     HRESULT hr;
 303     D3DPRESENT_PARAMETERS d3dpp = {0};
 304     D3DDISPLAYMODE        d3ddm;
 305     unsigned resetToken = 0;
 306     UINT adapter = D3DADAPTER_DEFAULT;
 307
 308     ctx = av_mallocz(sizeof(*ctx));
 309     if (!ctx)
 310         return AVERROR(ENOMEM);
 311
 312     ctx->deviceHandle = INVALID_HANDLE_VALUE;
 313
 314     ist->hwaccel_ctx           = ctx;
 315     ist->hwaccel_uninit        = dxva2_uninit;
 316     ist->hwaccel_get_buffer    = dxva2_get_buffer;
 317     ist->hwaccel_retrieve_data = dxva2_retrieve_data;
 318
 319     ctx->d3dlib = LoadLibrary("d3d9.dll");
 320     if (!ctx->d3dlib) {
 321         av_log(NULL, loglevel, "Failed to load D3D9 library\n");
 322         goto fail;
 323     }
 324     ctx->dxva2lib = LoadLibrary("dxva2.dll");
 325     if (!ctx->dxva2lib) {
 326         av_log(NULL, loglevel, "Failed to load DXVA2 library\n");
 327         goto fail;
 328     }
 329
 330     createD3D = (pDirect3DCreate9 *)GetProcAddress(ctx->d3dlib, "Direct3DCreate9");
 331     if (!createD3D) {
 332         av_log(NULL, loglevel, "Failed to locate Direct3DCreate9\n");
 333         goto fail;
 334     }
 335     createDeviceManager = (pCreateDeviceManager9 *)GetProcAddress(ctx->dxva2lib, "DXVA2CreateDirect3DDeviceManager9");
 336     if (!createDeviceManager) {
 337         av_log(NULL, loglevel, "Failed to locate DXVA2CreateDirect3DDeviceManager9\n");
 338         goto fail;
 339     }
 340
 341     ctx->d3d9 = createD3D(D3D_SDK_VERSION);
 342     if (!ctx->d3d9) {
 343         av_log(NULL, loglevel, "Failed to create IDirect3D object\n");
 344         goto fail;
 345     }
 346
 347     if (ist->hwaccel_device) {
 348         adapter = atoi(ist->hwaccel_device);
 349         av_log(NULL, AV_LOG_INFO, "Using HWAccel device %d\n", adapter);
 350     }
 351
 352     IDirect3D9_GetAdapterDisplayMode(ctx->d3d9, adapter, &d3ddm);
 353     d3dpp.Windowed         = TRUE;
 354     d3dpp.BackBufferWidth  = 640;
 355     d3dpp.BackBufferHeight = 480;
 356     d3dpp.BackBufferCount  = 0;
 357     d3dpp.BackBufferFormat = d3ddm.Format;
 358     d3dpp.SwapEffect       = D3DSWAPEFFECT_DISCARD;
 359     d3dpp.Flags            = D3DPRESENTFLAG_VIDEO;
 360
 361     hr = IDirect3D9_CreateDevice(ctx->d3d9, adapter, D3DDEVTYPE_HAL, GetShellWindow(),
 362                                  D3DCREATE_SOFTWARE_VERTEXPROCESSING | D3DCREATE_MULTITHREADED | D3DCREATE_FPU_PRESERVE,
 363                                  &d3dpp, &ctx->d3d9device);
 364     if (FAILED(hr)) {
 365         av_log(NULL, loglevel, "Failed to create Direct3D device\n");
 366         goto fail;
 367     }
 368
 369     hr = createDeviceManager(&resetToken, &ctx->d3d9devmgr);
 370     if (FAILED(hr)) {
 371         av_log(NULL, loglevel, "Failed to create Direct3D device manager\n");
 372         goto fail;
 373     }
 374
 375     hr = IDirect3DDeviceManager9_ResetDevice(ctx->d3d9devmgr, ctx->d3d9device, resetToken);
 376     if (FAILED(hr)) {
 377         av_log(NULL, loglevel, "Failed to bind Direct3D device to device manager\n");
 378         goto fail;
 379     }
 380
 381     hr = IDirect3DDeviceManager9_OpenDeviceHandle(ctx->d3d9devmgr, &ctx->deviceHandle);
 382     if (FAILED(hr)) {
 383         av_log(NULL, loglevel, "Failed to open device handle\n");
 384         goto fail;
 385     }
 386
 387     hr = IDirect3DDeviceManager9_GetVideoService(ctx->d3d9devmgr, ctx->deviceHandle, &IID_IDirectXVideoDecoderService, (void **)&ctx->decoder_service);
 388     if (FAILED(hr)) {
 389         av_log(NULL, loglevel, "Failed to create IDirectXVideoDecoderService\n");
 390         goto fail;
 391     }
 392
 393     ctx->tmp_frame = av_frame_alloc();
 394     if (!ctx->tmp_frame)
 395         goto fail;
 396
 397     s->hwaccel_context = av_mallocz(sizeof(struct dxva_context));
 398     if (!s->hwaccel_context)
 399         goto fail;
 400
 401     return 0;
 402 fail:
 403     dxva2_uninit(s);
 404     return AVERROR(EINVAL);
 405 }
 406
 407 static int dxva2_get_decoder_configuration(AVCodecContext *s, const GUID *device_guid,
 408                                            const DXVA2_VideoDesc *desc,
 409                                            DXVA2_ConfigPictureDecode *config)
 410 {
 411     InputStream  *ist = s->opaque;
 412     int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
 413     DXVA2Context *ctx = ist->hwaccel_ctx;
 414     unsigned cfg_count = 0, best_score = 0;
 415     DXVA2_ConfigPictureDecode *cfg_list = NULL;
 416     DXVA2_ConfigPictureDecode best_cfg = {{0}};
 417     HRESULT hr;
 418     int i;
 419
 420     hr = IDirectXVideoDecoderService_GetDecoderConfigurations(ctx->decoder_service, device_guid, desc, NULL, &cfg_count, &cfg_list);
 421     if (FAILED(hr)) {
 422         av_log(NULL, loglevel, "Unable to retrieve decoder configurations\n");
 423         return AVERROR(EINVAL);
 424     }
 425
 426     for (i = 0; i < cfg_count; i++) {
 427         DXVA2_ConfigPictureDecode *cfg = &cfg_list[i];
 428
 429         unsigned score;
 430         if (cfg->ConfigBitstreamRaw == 1)
 431             score = 1;
 432         else if (s->codec_id == AV_CODEC_ID_H264 && cfg->ConfigBitstreamRaw == 2)
 433             score = 2;
 434         else
 435             continue;
 436         if (IsEqualGUID(&cfg->guidConfigBitstreamEncryption, &DXVA2_NoEncrypt))
 437             score += 16;
 438         if (score > best_score) {
 439             best_score = score;
 440             best_cfg   = *cfg;
 441         }
 442     }
 443     CoTaskMemFree(cfg_list);
 444
 445     if (!best_score) {
 446         av_log(NULL, loglevel, "No valid decoder configuration available\n");
 447         return AVERROR(EINVAL);
 448     }
 449
 450     *config = best_cfg;
 451     return 0;
 452 }
 453
 454 static int dxva2_create_decoder(AVCodecContext *s)
 455 {
 456     InputStream  *ist = s->opaque;
 457     int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
 458     DXVA2Context *ctx = ist->hwaccel_ctx;
 459     struct dxva_context *dxva_ctx = s->hwaccel_context;
 460     GUID *guid_list = NULL;
 461     unsigned guid_count = 0, i, j;
 462     GUID device_guid = GUID_NULL;
 463     D3DFORMAT target_format = 0;
 464     DXVA2_VideoDesc desc = { 0 };
 465     DXVA2_ConfigPictureDecode config;
 466     HRESULT hr;
 467     int surface_alignment;
 468     int ret;
 469
 470     hr = IDirectXVideoDecoderService_GetDecoderDeviceGuids(ctx->decoder_service, &guid_count, &guid_list);
 471     if (FAILED(hr)) {
 472         av_log(NULL, loglevel, "Failed to retrieve decoder device GUIDs\n");
 473         goto fail;
 474     }
 475
 476     for (i = 0; dxva2_modes[i].guid; i++) {
 477         D3DFORMAT *target_list = NULL;
 478         unsigned target_count = 0;
 479         const dxva2_mode *mode = &dxva2_modes[i];
 480         if (mode->codec != s->codec_id)
 481             continue;
 482
 483         for (j = 0; j < guid_count; j++) {
 484             if (IsEqualGUID(mode->guid, &guid_list[j]))
 485                 break;
 486         }
 487         if (j == guid_count)
 488             continue;
 489
 490         hr = IDirectXVideoDecoderService_GetDecoderRenderTargets(ctx->decoder_service, mode->guid, &target_count, &target_list);
 491         if (FAILED(hr)) {
 492             continue;
 493         }
 494         for (j = 0; j < target_count; j++) {
 495             const D3DFORMAT format = target_list[j];
 496             if (format == MKTAG('N','V','1','2')) {
 497                 target_format = format;
 498                 break;
 499             }
 500         }
 501         CoTaskMemFree(target_list);
 502         if (target_format) {
 503             device_guid = *mode->guid;
 504             break;
 505         }
 506     }
 507     CoTaskMemFree(guid_list);
 508
 509     if (IsEqualGUID(&device_guid, &GUID_NULL)) {
 510         av_log(NULL, loglevel, "No decoder device for codec found\n");
 511         goto fail;
 512     }
 513
 514     desc.SampleWidth  = s->coded_width;
 515     desc.SampleHeight = s->coded_height;
 516     desc.Format       = target_format;
 517
 518     ret = dxva2_get_decoder_configuration(s, &device_guid, &desc, &config);
 519     if (ret < 0) {
 520         goto fail;
 521     }
 522
 523     /* decoding MPEG-2 requires additional alignment on some Intel GPUs,
 524        but it causes issues for H.264 on certain AMD GPUs..... */
 525     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO)
 526         surface_alignment = 32;
 527     else
 528         surface_alignment = 16;
 529
 530     /* 4 base work surfaces */
 531     ctx->num_surfaces = 4;
 532
 533     /* add surfaces based on number of possible refs */
 534     if (s->codec_id == AV_CODEC_ID_H264)
 535         ctx->num_surfaces += 16;
 536     else
 537         ctx->num_surfaces += 2;
 538
 539     /* add extra surfaces for frame threading */
 540     if (s->active_thread_type & FF_THREAD_FRAME)
 541         ctx->num_surfaces += s->thread_count;
 542
 543     ctx->surfaces      = av_mallocz(ctx->num_surfaces * sizeof(*ctx->surfaces));
 544     ctx->surface_infos = av_mallocz(ctx->num_surfaces * sizeof(*ctx->surface_infos));
 545
 546     if (!ctx->surfaces || !ctx->surface_infos) {
 547         av_log(NULL, loglevel, "Unable to allocate surface arrays\n");
 548         goto fail;
 549     }
 550
 551     hr = IDirectXVideoDecoderService_CreateSurface(ctx->decoder_service,
 552                                                    FFALIGN(s->coded_width, surface_alignment),
 553                                                    FFALIGN(s->coded_height, surface_alignment),
 554                                                    ctx->num_surfaces - 1,
 555                                                    target_format, D3DPOOL_DEFAULT, 0,
 556                                                    DXVA2_VideoDecoderRenderTarget,
 557                                                    ctx->surfaces, NULL);
 558     if (FAILED(hr)) {
 559         av_log(NULL, loglevel, "Failed to create %d video surfaces\n", ctx->num_surfaces);
 560         goto fail;
 561     }
 562
 563     hr = IDirectXVideoDecoderService_CreateVideoDecoder(ctx->decoder_service, &device_guid,
 564                                                         &desc, &config, ctx->surfaces,
 565                                                         ctx->num_surfaces, &ctx->decoder);
 566     if (FAILED(hr)) {
 567         av_log(NULL, loglevel, "Failed to create DXVA2 video decoder\n");
 568         goto fail;
 569     }
 570
 571     ctx->decoder_guid   = device_guid;
 572     ctx->decoder_config = config;
 573
 574     dxva_ctx->cfg           = &ctx->decoder_config;
 575     dxva_ctx->decoder       = ctx->decoder;
 576     dxva_ctx->surface       = ctx->surfaces;
 577     dxva_ctx->surface_count = ctx->num_surfaces;
 578
 579     if (IsEqualGUID(&ctx->decoder_guid, &DXVADDI_Intel_ModeH264_E))
 580         dxva_ctx->workaround |= FF_DXVA2_WORKAROUND_INTEL_CLEARVIDEO;
 581
 582     return 0;
 583 fail:
 584     dxva2_destroy_decoder(s);
 585     return AVERROR(EINVAL);
 586 }
 587
 588 int dxva2_init(AVCodecContext *s)
 589 {
 590     InputStream *ist = s->opaque;
 591     int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
 592     DXVA2Context *ctx;
 593     int ret;
 594
 595     if (!ist->hwaccel_ctx) {
 596         ret = dxva2_alloc(s);
 597         if (ret < 0)
 598             return ret;
 599     }
 600     ctx = ist->hwaccel_ctx;
 601
 602     if (s->codec_id == AV_CODEC_ID_H264 &&
 603         (s->profile & ~FF_PROFILE_H264_CONSTRAINED) > FF_PROFILE_H264_HIGH) {
 604         av_log(NULL, loglevel, "Unsupported H.264 profile for DXVA2 HWAccel: %d\n", s->profile);
 605         return AVERROR(EINVAL);
 606     }
 607
 608     if (ctx->decoder)
 609         dxva2_destroy_decoder(s);
 610
 611     ret = dxva2_create_decoder(s);
 612     if (ret < 0) {
 613         av_log(NULL, loglevel, "Error creating the DXVA2 decoder\n");
 614         return ret;
 615     }
 616
 617     return 0;
 618 }