git.sesse.net Git - ffmpeg/blob - ffmpeg_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 #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 #include <d3d9.h>
  31 #include <dxva2api.h>
  32
  33 #include "ffmpeg.h"
  34
  35 #include "libavcodec/dxva2.h"
  36
  37 #include "libavutil/avassert.h"
  38 #include "libavutil/buffer.h"
  39 #include "libavutil/frame.h"
  40 #include "libavutil/imgutils.h"
  41 #include "libavutil/pixfmt.h"
  42
  43 /* define all the GUIDs used directly here,
  44    to avoid problems with inconsistent dxva2api.h versions in mingw-w64 and different MSVC version */
  45 #include <initguid.h>
  46 DEFINE_GUID(IID_IDirectXVideoDecoderService, 0xfc51a551,0xd5e7,0x11d9,0xaf,0x55,0x00,0x05,0x4e,0x43,0xff,0x02);
  47
  48 DEFINE_GUID(DXVA2_ModeMPEG2_VLD,      0xee27417f, 0x5e28,0x4e65,0xbe,0xea,0x1d,0x26,0xb5,0x08,0xad,0xc9);
  49 DEFINE_GUID(DXVA2_ModeMPEG2and1_VLD,  0x86695f12, 0x340e,0x4f04,0x9f,0xd3,0x92,0x53,0xdd,0x32,0x74,0x60);
  50 DEFINE_GUID(DXVA2_ModeH264_E,         0x1b81be68, 0xa0c7,0x11d3,0xb9,0x84,0x00,0xc0,0x4f,0x2e,0x73,0xc5);
  51 DEFINE_GUID(DXVA2_ModeH264_F,         0x1b81be69, 0xa0c7,0x11d3,0xb9,0x84,0x00,0xc0,0x4f,0x2e,0x73,0xc5);
  52 DEFINE_GUID(DXVADDI_Intel_ModeH264_E, 0x604F8E68, 0x4951,0x4C54,0x88,0xFE,0xAB,0xD2,0x5C,0x15,0xB3,0xD6);
  53 DEFINE_GUID(DXVA2_ModeVC1_D,          0x1b81beA3, 0xa0c7,0x11d3,0xb9,0x84,0x00,0xc0,0x4f,0x2e,0x73,0xc5);
  54 DEFINE_GUID(DXVA2_ModeVC1_D2010,      0x1b81beA4, 0xa0c7,0x11d3,0xb9,0x84,0x00,0xc0,0x4f,0x2e,0x73,0xc5);
  55 DEFINE_GUID(DXVA2_NoEncrypt,          0x1b81beD0, 0xa0c7,0x11d3,0xb9,0x84,0x00,0xc0,0x4f,0x2e,0x73,0xc5);
  56 DEFINE_GUID(GUID_NULL,                0x00000000, 0x0000,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00);
  57
  58 typedef IDirect3D9* WINAPI pDirect3DCreate9(UINT);
  59 typedef HRESULT WINAPI pCreateDeviceManager9(UINT *, IDirect3DDeviceManager9 **);
  60
  61 typedef struct dxva2_mode {
  62   const GUID     *guid;
  63   enum AVCodecID codec;
  64 } dxva2_mode;
  65
  66 static const dxva2_mode dxva2_modes[] = {
  67     /* MPEG-2 */
  68     { &DXVA2_ModeMPEG2_VLD,      AV_CODEC_ID_MPEG2VIDEO },
  69     { &DXVA2_ModeMPEG2and1_VLD,  AV_CODEC_ID_MPEG2VIDEO },
  70
  71     /* H.264 */
  72     { &DXVA2_ModeH264_F,         AV_CODEC_ID_H264 },
  73     { &DXVA2_ModeH264_E,         AV_CODEC_ID_H264 },
  74     /* Intel specific H.264 mode */
  75     { &DXVADDI_Intel_ModeH264_E, AV_CODEC_ID_H264 },
  76
  77     /* VC-1 / WMV3 */
  78     { &DXVA2_ModeVC1_D2010,      AV_CODEC_ID_VC1  },
  79     { &DXVA2_ModeVC1_D2010,      AV_CODEC_ID_WMV3 },
  80     { &DXVA2_ModeVC1_D,          AV_CODEC_ID_VC1  },
  81     { &DXVA2_ModeVC1_D,          AV_CODEC_ID_WMV3 },
  82
  83     { NULL,                      0 },
  84 };
  85
  86 typedef struct surface_info {
  87     int used;
  88     uint64_t age;
  89 } surface_info;
  90
  91 typedef struct DXVA2Context {
  92     HMODULE d3dlib;
  93     HMODULE dxva2lib;
  94
  95     HANDLE  deviceHandle;
  96
  97     IDirect3D9                  *d3d9;
  98     IDirect3DDevice9            *d3d9device;
  99     IDirect3DDeviceManager9     *d3d9devmgr;
 100     IDirectXVideoDecoderService *decoder_service;
 101     IDirectXVideoDecoder        *decoder;
 102
 103     GUID                        decoder_guid;
 104     DXVA2_ConfigPictureDecode   decoder_config;
 105
 106     LPDIRECT3DSURFACE9          *surfaces;
 107     surface_info                *surface_infos;
 108     uint32_t                    num_surfaces;
 109     uint64_t                    surface_age;
 110
 111     AVFrame                     *tmp_frame;
 112 } DXVA2Context;
 113
 114 typedef struct DXVA2SurfaceWrapper {
 115     DXVA2Context         *ctx;
 116     LPDIRECT3DSURFACE9   surface;
 117     IDirectXVideoDecoder *decoder;
 118 } DXVA2SurfaceWrapper;
 119
 120 static void dxva2_destroy_decoder(AVCodecContext *s)
 121 {
 122     InputStream  *ist = s->opaque;
 123     DXVA2Context *ctx = ist->hwaccel_ctx;
 124     int i;
 125
 126     if (ctx->surfaces) {
 127         for (i = 0; i < ctx->num_surfaces; i++) {
 128             if (ctx->surfaces[i])
 129                 IDirect3DSurface9_Release(ctx->surfaces[i]);
 130         }
 131     }
 132     av_freep(&ctx->surfaces);
 133     av_freep(&ctx->surface_infos);
 134     ctx->num_surfaces = 0;
 135     ctx->surface_age  = 0;
 136
 137     if (ctx->decoder) {
 138         IDirectXVideoDecoder_Release(ctx->decoder);
 139         ctx->decoder = NULL;
 140     }
 141 }
 142
 143 static void dxva2_uninit(AVCodecContext *s)
 144 {
 145     InputStream  *ist = s->opaque;
 146     DXVA2Context *ctx = ist->hwaccel_ctx;
 147
 148     ist->hwaccel_uninit        = NULL;
 149     ist->hwaccel_get_buffer    = NULL;
 150     ist->hwaccel_retrieve_data = NULL;
 151
 152     if (ctx->decoder)
 153         dxva2_destroy_decoder(s);
 154
 155     if (ctx->decoder_service)
 156         IDirectXVideoDecoderService_Release(ctx->decoder_service);
 157
 158     if (ctx->d3d9devmgr && ctx->deviceHandle != INVALID_HANDLE_VALUE)
 159         IDirect3DDeviceManager9_CloseDeviceHandle(ctx->d3d9devmgr, ctx->deviceHandle);
 160
 161     if (ctx->d3d9devmgr)
 162         IDirect3DDeviceManager9_Release(ctx->d3d9devmgr);
 163
 164     if (ctx->d3d9device)
 165         IDirect3DDevice9_Release(ctx->d3d9device);
 166
 167     if (ctx->d3d9)
 168         IDirect3D9_Release(ctx->d3d9);
 169
 170     if (ctx->d3dlib)
 171         FreeLibrary(ctx->d3dlib);
 172
 173     if (ctx->dxva2lib)
 174         FreeLibrary(ctx->dxva2lib);
 175
 176     av_frame_free(&ctx->tmp_frame);
 177
 178     av_freep(&ist->hwaccel_ctx);
 179     av_freep(&s->hwaccel_context);
 180 }
 181
 182 static void dxva2_release_buffer(void *opaque, uint8_t *data)
 183 {
 184     DXVA2SurfaceWrapper *w   = opaque;
 185     DXVA2Context        *ctx = w->ctx;
 186     int i;
 187
 188     for (i = 0; i < ctx->num_surfaces; i++) {
 189         if (ctx->surfaces[i] == w->surface) {
 190             ctx->surface_infos[i].used = 0;
 191             break;
 192         }
 193     }
 194     IDirect3DSurface9_Release(w->surface);
 195     IDirectXVideoDecoder_Release(w->decoder);
 196     av_free(w);
 197 }
 198
 199 static int dxva2_get_buffer(AVCodecContext *s, AVFrame *frame, int flags)
 200 {
 201     InputStream  *ist = s->opaque;
 202     DXVA2Context *ctx = ist->hwaccel_ctx;
 203     int i, old_unused = -1;
 204     LPDIRECT3DSURFACE9 surface;
 205     DXVA2SurfaceWrapper *w = NULL;
 206
 207     av_assert0(frame->format == AV_PIX_FMT_DXVA2_VLD);
 208
 209     for (i = 0; i < ctx->num_surfaces; i++) {
 210         surface_info *info = &ctx->surface_infos[i];
 211         if (!info->used && (old_unused == -1 || info->age < ctx->surface_infos[old_unused].age))
 212             old_unused = i;
 213     }
 214     if (old_unused == -1) {
 215         av_log(NULL, AV_LOG_ERROR, "No free DXVA2 surface!\n");
 216         return AVERROR(ENOMEM);
 217     }
 218     i = old_unused;
 219
 220     surface = ctx->surfaces[i];
 221
 222     w = av_mallocz(sizeof(*w));
 223     if (!w)
 224         return AVERROR(ENOMEM);
 225
 226     frame->buf[0] = av_buffer_create((uint8_t*)surface, 0,
 227                                      dxva2_release_buffer, w,
 228                                      AV_BUFFER_FLAG_READONLY);
 229     if (!frame->buf[0]) {
 230         av_free(w);
 231         return AVERROR(ENOMEM);
 232     }
 233
 234     w->ctx     = ctx;
 235     w->surface = surface;
 236     IDirect3DSurface9_AddRef(w->surface);
 237     w->decoder = ctx->decoder;
 238     IDirectXVideoDecoder_AddRef(w->decoder);
 239
 240     ctx->surface_infos[i].used = 1;
 241     ctx->surface_infos[i].age  = ctx->surface_age++;
 242
 243     frame->data[3] = (uint8_t *)surface;
 244
 245     return 0;
 246 }
 247
 248 static int dxva2_retrieve_data(AVCodecContext *s, AVFrame *frame)
 249 {
 250     LPDIRECT3DSURFACE9 surface =  (LPDIRECT3DSURFACE9)frame->data[3];
 251     InputStream        *ist = s->opaque;
 252     DXVA2Context       *ctx = ist->hwaccel_ctx;
 253     D3DSURFACE_DESC    surfaceDesc;
 254     D3DLOCKED_RECT     LockedRect;
 255     HRESULT            hr;
 256     int                ret;
 257
 258     IDirect3DSurface9_GetDesc(surface, &surfaceDesc);
 259
 260     ctx->tmp_frame->width  = frame->width;
 261     ctx->tmp_frame->height = frame->height;
 262     ctx->tmp_frame->format = AV_PIX_FMT_NV12;
 263
 264     ret = av_frame_get_buffer(ctx->tmp_frame, 32);
 265     if (ret < 0)
 266         return ret;
 267
 268     hr = IDirect3DSurface9_LockRect(surface, &LockedRect, NULL, D3DLOCK_READONLY);
 269     if (FAILED(hr)) {
 270         av_log(NULL, AV_LOG_ERROR, "Unable to lock DXVA2 surface\n");
 271         return AVERROR_UNKNOWN;
 272     }
 273
 274     av_image_copy_plane(ctx->tmp_frame->data[0], ctx->tmp_frame->linesize[0],
 275                         (uint8_t*)LockedRect.pBits,
 276                         LockedRect.Pitch, frame->width, frame->height);
 277
 278     av_image_copy_plane(ctx->tmp_frame->data[1], ctx->tmp_frame->linesize[1],
 279                         (uint8_t*)LockedRect.pBits + LockedRect.Pitch * surfaceDesc.Height,
 280                         LockedRect.Pitch, frame->width, frame->height / 2);
 281
 282     IDirect3DSurface9_UnlockRect(surface);
 283
 284     ret = av_frame_copy_props(ctx->tmp_frame, frame);
 285     if (ret < 0)
 286         goto fail;
 287
 288     av_frame_unref(frame);
 289     av_frame_move_ref(frame, ctx->tmp_frame);
 290
 291     return 0;
 292 fail:
 293     av_frame_unref(ctx->tmp_frame);
 294     return ret;
 295 }
 296
 297 static int dxva2_alloc(AVCodecContext *s)
 298 {
 299     InputStream  *ist = s->opaque;
 300     int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
 301     DXVA2Context *ctx;
 302     pDirect3DCreate9      *createD3D = NULL;
 303     pCreateDeviceManager9 *createDeviceManager = NULL;
 304     HRESULT hr;
 305     D3DPRESENT_PARAMETERS d3dpp = {0};
 306     D3DDISPLAYMODE        d3ddm;
 307     unsigned resetToken = 0;
 308     UINT adapter = D3DADAPTER_DEFAULT;
 309
 310     ctx = av_mallocz(sizeof(*ctx));
 311     if (!ctx)
 312         return AVERROR(ENOMEM);
 313
 314     ctx->deviceHandle = INVALID_HANDLE_VALUE;
 315
 316     ist->hwaccel_ctx           = ctx;
 317     ist->hwaccel_uninit        = dxva2_uninit;
 318     ist->hwaccel_get_buffer    = dxva2_get_buffer;
 319     ist->hwaccel_retrieve_data = dxva2_retrieve_data;
 320
 321     ctx->d3dlib = LoadLibrary("d3d9.dll");
 322     if (!ctx->d3dlib) {
 323         av_log(NULL, loglevel, "Failed to load D3D9 library\n");
 324         goto fail;
 325     }
 326     ctx->dxva2lib = LoadLibrary("dxva2.dll");
 327     if (!ctx->dxva2lib) {
 328         av_log(NULL, loglevel, "Failed to load DXVA2 library\n");
 329         goto fail;
 330     }
 331
 332     createD3D = (pDirect3DCreate9 *)GetProcAddress(ctx->d3dlib, "Direct3DCreate9");
 333     if (!createD3D) {
 334         av_log(NULL, loglevel, "Failed to locate Direct3DCreate9\n");
 335         goto fail;
 336     }
 337     createDeviceManager = (pCreateDeviceManager9 *)GetProcAddress(ctx->dxva2lib, "DXVA2CreateDirect3DDeviceManager9");
 338     if (!createDeviceManager) {
 339         av_log(NULL, loglevel, "Failed to locate DXVA2CreateDirect3DDeviceManager9\n");
 340         goto fail;
 341     }
 342
 343     ctx->d3d9 = createD3D(D3D_SDK_VERSION);
 344     if (!ctx->d3d9) {
 345         av_log(NULL, loglevel, "Failed to create IDirect3D object\n");
 346         goto fail;
 347     }
 348
 349     if (ist->hwaccel_device) {
 350         adapter = atoi(ist->hwaccel_device);
 351         av_log(NULL, AV_LOG_INFO, "Using HWAccel device %d\n", adapter);
 352     }
 353
 354     IDirect3D9_GetAdapterDisplayMode(ctx->d3d9, adapter, &d3ddm);
 355     d3dpp.Windowed         = TRUE;
 356     d3dpp.BackBufferWidth  = 640;
 357     d3dpp.BackBufferHeight = 480;
 358     d3dpp.BackBufferCount  = 0;
 359     d3dpp.BackBufferFormat = d3ddm.Format;
 360     d3dpp.SwapEffect       = D3DSWAPEFFECT_DISCARD;
 361     d3dpp.Flags            = D3DPRESENTFLAG_VIDEO;
 362
 363     hr = IDirect3D9_CreateDevice(ctx->d3d9, adapter, D3DDEVTYPE_HAL, GetShellWindow(),
 364                                  D3DCREATE_SOFTWARE_VERTEXPROCESSING | D3DCREATE_MULTITHREADED | D3DCREATE_FPU_PRESERVE,
 365                                  &d3dpp, &ctx->d3d9device);
 366     if (FAILED(hr)) {
 367         av_log(NULL, loglevel, "Failed to create Direct3D device\n");
 368         goto fail;
 369     }
 370
 371     hr = createDeviceManager(&resetToken, &ctx->d3d9devmgr);
 372     if (FAILED(hr)) {
 373         av_log(NULL, loglevel, "Failed to create Direct3D device manager\n");
 374         goto fail;
 375     }
 376
 377     hr = IDirect3DDeviceManager9_ResetDevice(ctx->d3d9devmgr, ctx->d3d9device, resetToken);
 378     if (FAILED(hr)) {
 379         av_log(NULL, loglevel, "Failed to bind Direct3D device to device manager\n");
 380         goto fail;
 381     }
 382
 383     hr = IDirect3DDeviceManager9_OpenDeviceHandle(ctx->d3d9devmgr, &ctx->deviceHandle);
 384     if (FAILED(hr)) {
 385         av_log(NULL, loglevel, "Failed to open device handle\n");
 386         goto fail;
 387     }
 388
 389     hr = IDirect3DDeviceManager9_GetVideoService(ctx->d3d9devmgr, ctx->deviceHandle, &IID_IDirectXVideoDecoderService, (void **)&ctx->decoder_service);
 390     if (FAILED(hr)) {
 391         av_log(NULL, loglevel, "Failed to create IDirectXVideoDecoderService\n");
 392         goto fail;
 393     }
 394
 395     ctx->tmp_frame = av_frame_alloc();
 396     if (!ctx->tmp_frame)
 397         goto fail;
 398
 399     s->hwaccel_context = av_mallocz(sizeof(struct dxva_context));
 400     if (!s->hwaccel_context)
 401         goto fail;
 402
 403     return 0;
 404 fail:
 405     dxva2_uninit(s);
 406     return AVERROR(EINVAL);
 407 }
 408
 409 static int dxva2_get_decoder_configuration(AVCodecContext *s, const GUID *device_guid,
 410                                            const DXVA2_VideoDesc *desc,
 411                                            DXVA2_ConfigPictureDecode *config)
 412 {
 413     InputStream  *ist = s->opaque;
 414     int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
 415     DXVA2Context *ctx = ist->hwaccel_ctx;
 416     unsigned cfg_count = 0, best_score = 0;
 417     DXVA2_ConfigPictureDecode *cfg_list = NULL;
 418     DXVA2_ConfigPictureDecode best_cfg = {{0}};
 419     HRESULT hr;
 420     int i;
 421
 422     hr = IDirectXVideoDecoderService_GetDecoderConfigurations(ctx->decoder_service, device_guid, desc, NULL, &cfg_count, &cfg_list);
 423     if (FAILED(hr)) {
 424         av_log(NULL, loglevel, "Unable to retrieve decoder configurations\n");
 425         return AVERROR(EINVAL);
 426     }
 427
 428     for (i = 0; i < cfg_count; i++) {
 429         DXVA2_ConfigPictureDecode *cfg = &cfg_list[i];
 430
 431         unsigned score;
 432         if (cfg->ConfigBitstreamRaw == 1)
 433             score = 1;
 434         else if (s->codec_id == AV_CODEC_ID_H264 && cfg->ConfigBitstreamRaw == 2)
 435             score = 2;
 436         else
 437             continue;
 438         if (IsEqualGUID(&cfg->guidConfigBitstreamEncryption, &DXVA2_NoEncrypt))
 439             score += 16;
 440         if (score > best_score) {
 441             best_score = score;
 442             best_cfg   = *cfg;
 443         }
 444     }
 445     CoTaskMemFree(cfg_list);
 446
 447     if (!best_score) {
 448         av_log(NULL, loglevel, "No valid decoder configuration available\n");
 449         return AVERROR(EINVAL);
 450     }
 451
 452     *config = best_cfg;
 453     return 0;
 454 }
 455
 456 static int dxva2_create_decoder(AVCodecContext *s)
 457 {
 458     InputStream  *ist = s->opaque;
 459     int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
 460     DXVA2Context *ctx = ist->hwaccel_ctx;
 461     struct dxva_context *dxva_ctx = s->hwaccel_context;
 462     GUID *guid_list = NULL;
 463     unsigned guid_count = 0, i, j;
 464     GUID device_guid = GUID_NULL;
 465     D3DFORMAT target_format = 0;
 466     DXVA2_VideoDesc desc = { 0 };
 467     DXVA2_ConfigPictureDecode config;
 468     HRESULT hr;
 469     int surface_alignment;
 470     int ret;
 471
 472     hr = IDirectXVideoDecoderService_GetDecoderDeviceGuids(ctx->decoder_service, &guid_count, &guid_list);
 473     if (FAILED(hr)) {
 474         av_log(NULL, loglevel, "Failed to retrieve decoder device GUIDs\n");
 475         goto fail;
 476     }
 477
 478     for (i = 0; dxva2_modes[i].guid; i++) {
 479         D3DFORMAT *target_list = NULL;
 480         unsigned target_count = 0;
 481         const dxva2_mode *mode = &dxva2_modes[i];
 482         if (mode->codec != s->codec_id)
 483             continue;
 484
 485         for (j = 0; j < guid_count; j++) {
 486             if (IsEqualGUID(mode->guid, &guid_list[j]))
 487                 break;
 488         }
 489         if (j == guid_count)
 490             continue;
 491
 492         hr = IDirectXVideoDecoderService_GetDecoderRenderTargets(ctx->decoder_service, mode->guid, &target_count, &target_list);
 493         if (FAILED(hr)) {
 494             continue;
 495         }
 496         for (j = 0; j < target_count; j++) {
 497             const D3DFORMAT format = target_list[j];
 498             if (format == MKTAG('N','V','1','2')) {
 499                 target_format = format;
 500                 break;
 501             }
 502         }
 503         CoTaskMemFree(target_list);
 504         if (target_format) {
 505             device_guid = *mode->guid;
 506             break;
 507         }
 508     }
 509     CoTaskMemFree(guid_list);
 510
 511     if (IsEqualGUID(&device_guid, &GUID_NULL)) {
 512         av_log(NULL, loglevel, "No decoder device for codec found\n");
 513         goto fail;
 514     }
 515
 516     desc.SampleWidth  = s->coded_width;
 517     desc.SampleHeight = s->coded_height;
 518     desc.Format       = target_format;
 519
 520     ret = dxva2_get_decoder_configuration(s, &device_guid, &desc, &config);
 521     if (ret < 0) {
 522         goto fail;
 523     }
 524
 525     /* decoding MPEG-2 requires additional alignment on some Intel GPUs,
 526        but it causes issues for H.264 on certain AMD GPUs..... */
 527     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO)
 528         surface_alignment = 32;
 529     else
 530         surface_alignment = 16;
 531
 532     /* 4 base work surfaces */
 533     ctx->num_surfaces = 4;
 534
 535     /* add surfaces based on number of possible refs */
 536     if (s->codec_id == AV_CODEC_ID_H264)
 537         ctx->num_surfaces += 16;
 538     else
 539         ctx->num_surfaces += 2;
 540
 541     /* add extra surfaces for frame threading */
 542     if (s->active_thread_type & FF_THREAD_FRAME)
 543         ctx->num_surfaces += s->thread_count;
 544
 545     ctx->surfaces      = av_mallocz(ctx->num_surfaces * sizeof(*ctx->surfaces));
 546     ctx->surface_infos = av_mallocz(ctx->num_surfaces * sizeof(*ctx->surface_infos));
 547
 548     if (!ctx->surfaces || !ctx->surface_infos) {
 549         av_log(NULL, loglevel, "Unable to allocate surface arrays\n");
 550         goto fail;
 551     }
 552
 553     hr = IDirectXVideoDecoderService_CreateSurface(ctx->decoder_service,
 554                                                    FFALIGN(s->coded_width, surface_alignment),
 555                                                    FFALIGN(s->coded_height, surface_alignment),
 556                                                    ctx->num_surfaces - 1,
 557                                                    target_format, D3DPOOL_DEFAULT, 0,
 558                                                    DXVA2_VideoDecoderRenderTarget,
 559                                                    ctx->surfaces, NULL);
 560     if (FAILED(hr)) {
 561         av_log(NULL, loglevel, "Failed to create %d video surfaces\n", ctx->num_surfaces);
 562         goto fail;
 563     }
 564
 565     hr = IDirectXVideoDecoderService_CreateVideoDecoder(ctx->decoder_service, &device_guid,
 566                                                         &desc, &config, ctx->surfaces,
 567                                                         ctx->num_surfaces, &ctx->decoder);
 568     if (FAILED(hr)) {
 569         av_log(NULL, loglevel, "Failed to create DXVA2 video decoder\n");
 570         goto fail;
 571     }
 572
 573     ctx->decoder_guid   = device_guid;
 574     ctx->decoder_config = config;
 575
 576     dxva_ctx->cfg           = &ctx->decoder_config;
 577     dxva_ctx->decoder       = ctx->decoder;
 578     dxva_ctx->surface       = ctx->surfaces;
 579     dxva_ctx->surface_count = ctx->num_surfaces;
 580
 581     if (IsEqualGUID(&ctx->decoder_guid, &DXVADDI_Intel_ModeH264_E))
 582         dxva_ctx->workaround |= FF_DXVA2_WORKAROUND_INTEL_CLEARVIDEO;
 583
 584     return 0;
 585 fail:
 586     dxva2_destroy_decoder(s);
 587     return AVERROR(EINVAL);
 588 }
 589
 590 int dxva2_init(AVCodecContext *s)
 591 {
 592     InputStream *ist = s->opaque;
 593     int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
 594     DXVA2Context *ctx;
 595     int ret;
 596
 597     if (!ist->hwaccel_ctx) {
 598         ret = dxva2_alloc(s);
 599         if (ret < 0)
 600             return ret;
 601     }
 602     ctx = ist->hwaccel_ctx;
 603
 604     if (s->codec_id == AV_CODEC_ID_H264 &&
 605         (s->profile & ~FF_PROFILE_H264_CONSTRAINED) > FF_PROFILE_H264_HIGH) {
 606         av_log(NULL, loglevel, "Unsupported H.264 profile for DXVA2 HWAccel: %d\n", s->profile);
 607         return AVERROR(EINVAL);
 608     }
 609
 610     if (ctx->decoder)
 611         dxva2_destroy_decoder(s);
 612
 613     ret = dxva2_create_decoder(s);
 614     if (ret < 0) {
 615         av_log(NULL, loglevel, "Error creating the DXVA2 decoder\n");
 616         return ret;
 617     }
 618
 619     return 0;
 620 }