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_ModeHEVC_VLD_Main,  0x5b11d51b, 0x2f4c,0x4452,0xbc,0xc3,0x09,0xf2,0xa1,0x16,0x0c,0xc0);
  56 DEFINE_GUID(DXVA2_ModeVP9_VLD_Profile0, 0x463707f8, 0xa1d0,0x4585,0x87,0x6d,0x83,0xaa,0x6d,0x60,0xb8,0x9e);
  57 DEFINE_GUID(DXVA2_NoEncrypt,          0x1b81beD0, 0xa0c7,0x11d3,0xb9,0x84,0x00,0xc0,0x4f,0x2e,0x73,0xc5);
  58 DEFINE_GUID(GUID_NULL,                0x00000000, 0x0000,0x0000,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00);
  59
  60 typedef IDirect3D9* WINAPI pDirect3DCreate9(UINT);
  61 typedef HRESULT WINAPI pCreateDeviceManager9(UINT *, IDirect3DDeviceManager9 **);
  62
  63 typedef struct dxva2_mode {
  64   const GUID     *guid;
  65   enum AVCodecID codec;
  66 } dxva2_mode;
  67
  68 static const dxva2_mode dxva2_modes[] = {
  69     /* MPEG-2 */
  70     { &DXVA2_ModeMPEG2_VLD,      AV_CODEC_ID_MPEG2VIDEO },
  71     { &DXVA2_ModeMPEG2and1_VLD,  AV_CODEC_ID_MPEG2VIDEO },
  72
  73     /* H.264 */
  74     { &DXVA2_ModeH264_F,         AV_CODEC_ID_H264 },
  75     { &DXVA2_ModeH264_E,         AV_CODEC_ID_H264 },
  76     /* Intel specific H.264 mode */
  77     { &DXVADDI_Intel_ModeH264_E, AV_CODEC_ID_H264 },
  78
  79     /* VC-1 / WMV3 */
  80     { &DXVA2_ModeVC1_D2010,      AV_CODEC_ID_VC1  },
  81     { &DXVA2_ModeVC1_D2010,      AV_CODEC_ID_WMV3 },
  82     { &DXVA2_ModeVC1_D,          AV_CODEC_ID_VC1  },
  83     { &DXVA2_ModeVC1_D,          AV_CODEC_ID_WMV3 },
  84
  85     /* HEVC/H.265 */
  86     { &DXVA2_ModeHEVC_VLD_Main,  AV_CODEC_ID_HEVC },
  87
  88     /* VP8/9 */
  89     { &DXVA2_ModeVP9_VLD_Profile0, AV_CODEC_ID_VP9 },
  90
  91     { NULL,                      0 },
  92 };
  93
  94 typedef struct surface_info {
  95     int used;
  96     uint64_t age;
  97 } surface_info;
  98
  99 typedef struct DXVA2Context {
 100     HMODULE d3dlib;
 101     HMODULE dxva2lib;
 102
 103     HANDLE  deviceHandle;
 104
 105     IDirect3D9                  *d3d9;
 106     IDirect3DDevice9            *d3d9device;
 107     IDirect3DDeviceManager9     *d3d9devmgr;
 108     IDirectXVideoDecoderService *decoder_service;
 109     IDirectXVideoDecoder        *decoder;
 110
 111     GUID                        decoder_guid;
 112     DXVA2_ConfigPictureDecode   decoder_config;
 113
 114     LPDIRECT3DSURFACE9          *surfaces;
 115     surface_info                *surface_infos;
 116     uint32_t                    num_surfaces;
 117     uint64_t                    surface_age;
 118
 119     AVFrame                     *tmp_frame;
 120 } DXVA2Context;
 121
 122 typedef struct DXVA2SurfaceWrapper {
 123     DXVA2Context         *ctx;
 124     LPDIRECT3DSURFACE9   surface;
 125     IDirectXVideoDecoder *decoder;
 126 } DXVA2SurfaceWrapper;
 127
 128 static void dxva2_destroy_decoder(AVCodecContext *s)
 129 {
 130     InputStream  *ist = s->opaque;
 131     DXVA2Context *ctx = ist->hwaccel_ctx;
 132     int i;
 133
 134     if (ctx->surfaces) {
 135         for (i = 0; i < ctx->num_surfaces; i++) {
 136             if (ctx->surfaces[i])
 137                 IDirect3DSurface9_Release(ctx->surfaces[i]);
 138         }
 139     }
 140     av_freep(&ctx->surfaces);
 141     av_freep(&ctx->surface_infos);
 142     ctx->num_surfaces = 0;
 143     ctx->surface_age  = 0;
 144
 145     if (ctx->decoder) {
 146         IDirectXVideoDecoder_Release(ctx->decoder);
 147         ctx->decoder = NULL;
 148     }
 149 }
 150
 151 static void dxva2_uninit(AVCodecContext *s)
 152 {
 153     InputStream  *ist = s->opaque;
 154     DXVA2Context *ctx = ist->hwaccel_ctx;
 155
 156     ist->hwaccel_uninit        = NULL;
 157     ist->hwaccel_get_buffer    = NULL;
 158     ist->hwaccel_retrieve_data = NULL;
 159
 160     if (ctx->decoder)
 161         dxva2_destroy_decoder(s);
 162
 163     if (ctx->decoder_service)
 164         IDirectXVideoDecoderService_Release(ctx->decoder_service);
 165
 166     if (ctx->d3d9devmgr && ctx->deviceHandle != INVALID_HANDLE_VALUE)
 167         IDirect3DDeviceManager9_CloseDeviceHandle(ctx->d3d9devmgr, ctx->deviceHandle);
 168
 169     if (ctx->d3d9devmgr)
 170         IDirect3DDeviceManager9_Release(ctx->d3d9devmgr);
 171
 172     if (ctx->d3d9device)
 173         IDirect3DDevice9_Release(ctx->d3d9device);
 174
 175     if (ctx->d3d9)
 176         IDirect3D9_Release(ctx->d3d9);
 177
 178     if (ctx->d3dlib)
 179         FreeLibrary(ctx->d3dlib);
 180
 181     if (ctx->dxva2lib)
 182         FreeLibrary(ctx->dxva2lib);
 183
 184     av_frame_free(&ctx->tmp_frame);
 185
 186     av_freep(&ist->hwaccel_ctx);
 187     av_freep(&s->hwaccel_context);
 188 }
 189
 190 static void dxva2_release_buffer(void *opaque, uint8_t *data)
 191 {
 192     DXVA2SurfaceWrapper *w   = opaque;
 193     DXVA2Context        *ctx = w->ctx;
 194     int i;
 195
 196     for (i = 0; i < ctx->num_surfaces; i++) {
 197         if (ctx->surfaces[i] == w->surface) {
 198             ctx->surface_infos[i].used = 0;
 199             break;
 200         }
 201     }
 202     IDirect3DSurface9_Release(w->surface);
 203     IDirectXVideoDecoder_Release(w->decoder);
 204     av_free(w);
 205 }
 206
 207 static int dxva2_get_buffer(AVCodecContext *s, AVFrame *frame, int flags)
 208 {
 209     InputStream  *ist = s->opaque;
 210     DXVA2Context *ctx = ist->hwaccel_ctx;
 211     int i, old_unused = -1;
 212     LPDIRECT3DSURFACE9 surface;
 213     DXVA2SurfaceWrapper *w = NULL;
 214
 215     av_assert0(frame->format == AV_PIX_FMT_DXVA2_VLD);
 216
 217     for (i = 0; i < ctx->num_surfaces; i++) {
 218         surface_info *info = &ctx->surface_infos[i];
 219         if (!info->used && (old_unused == -1 || info->age < ctx->surface_infos[old_unused].age))
 220             old_unused = i;
 221     }
 222     if (old_unused == -1) {
 223         av_log(NULL, AV_LOG_ERROR, "No free DXVA2 surface!\n");
 224         return AVERROR(ENOMEM);
 225     }
 226     i = old_unused;
 227
 228     surface = ctx->surfaces[i];
 229
 230     w = av_mallocz(sizeof(*w));
 231     if (!w)
 232         return AVERROR(ENOMEM);
 233
 234     frame->buf[0] = av_buffer_create((uint8_t*)surface, 0,
 235                                      dxva2_release_buffer, w,
 236                                      AV_BUFFER_FLAG_READONLY);
 237     if (!frame->buf[0]) {
 238         av_free(w);
 239         return AVERROR(ENOMEM);
 240     }
 241
 242     w->ctx     = ctx;
 243     w->surface = surface;
 244     IDirect3DSurface9_AddRef(w->surface);
 245     w->decoder = ctx->decoder;
 246     IDirectXVideoDecoder_AddRef(w->decoder);
 247
 248     ctx->surface_infos[i].used = 1;
 249     ctx->surface_infos[i].age  = ctx->surface_age++;
 250
 251     frame->data[3] = (uint8_t *)surface;
 252
 253     return 0;
 254 }
 255
 256 static int dxva2_retrieve_data(AVCodecContext *s, AVFrame *frame)
 257 {
 258     LPDIRECT3DSURFACE9 surface =  (LPDIRECT3DSURFACE9)frame->data[3];
 259     InputStream        *ist = s->opaque;
 260     DXVA2Context       *ctx = ist->hwaccel_ctx;
 261     D3DSURFACE_DESC    surfaceDesc;
 262     D3DLOCKED_RECT     LockedRect;
 263     HRESULT            hr;
 264     int                ret;
 265
 266     IDirect3DSurface9_GetDesc(surface, &surfaceDesc);
 267
 268     ctx->tmp_frame->width  = frame->width;
 269     ctx->tmp_frame->height = frame->height;
 270     ctx->tmp_frame->format = AV_PIX_FMT_NV12;
 271
 272     ret = av_frame_get_buffer(ctx->tmp_frame, 32);
 273     if (ret < 0)
 274         return ret;
 275
 276     hr = IDirect3DSurface9_LockRect(surface, &LockedRect, NULL, D3DLOCK_READONLY);
 277     if (FAILED(hr)) {
 278         av_log(NULL, AV_LOG_ERROR, "Unable to lock DXVA2 surface\n");
 279         return AVERROR_UNKNOWN;
 280     }
 281
 282     av_image_copy_plane(ctx->tmp_frame->data[0], ctx->tmp_frame->linesize[0],
 283                         (uint8_t*)LockedRect.pBits,
 284                         LockedRect.Pitch, frame->width, frame->height);
 285
 286     av_image_copy_plane(ctx->tmp_frame->data[1], ctx->tmp_frame->linesize[1],
 287                         (uint8_t*)LockedRect.pBits + LockedRect.Pitch * surfaceDesc.Height,
 288                         LockedRect.Pitch, frame->width, frame->height / 2);
 289
 290     IDirect3DSurface9_UnlockRect(surface);
 291
 292     ret = av_frame_copy_props(ctx->tmp_frame, frame);
 293     if (ret < 0)
 294         goto fail;
 295
 296     av_frame_unref(frame);
 297     av_frame_move_ref(frame, ctx->tmp_frame);
 298
 299     return 0;
 300 fail:
 301     av_frame_unref(ctx->tmp_frame);
 302     return ret;
 303 }
 304
 305 static int dxva2_alloc(AVCodecContext *s)
 306 {
 307     InputStream  *ist = s->opaque;
 308     int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
 309     DXVA2Context *ctx;
 310     pDirect3DCreate9      *createD3D = NULL;
 311     pCreateDeviceManager9 *createDeviceManager = NULL;
 312     HRESULT hr;
 313     D3DPRESENT_PARAMETERS d3dpp = {0};
 314     D3DDISPLAYMODE        d3ddm;
 315     unsigned resetToken = 0;
 316     UINT adapter = D3DADAPTER_DEFAULT;
 317
 318     ctx = av_mallocz(sizeof(*ctx));
 319     if (!ctx)
 320         return AVERROR(ENOMEM);
 321
 322     ctx->deviceHandle = INVALID_HANDLE_VALUE;
 323
 324     ist->hwaccel_ctx           = ctx;
 325     ist->hwaccel_uninit        = dxva2_uninit;
 326     ist->hwaccel_get_buffer    = dxva2_get_buffer;
 327     ist->hwaccel_retrieve_data = dxva2_retrieve_data;
 328
 329     ctx->d3dlib = LoadLibrary("d3d9.dll");
 330     if (!ctx->d3dlib) {
 331         av_log(NULL, loglevel, "Failed to load D3D9 library\n");
 332         goto fail;
 333     }
 334     ctx->dxva2lib = LoadLibrary("dxva2.dll");
 335     if (!ctx->dxva2lib) {
 336         av_log(NULL, loglevel, "Failed to load DXVA2 library\n");
 337         goto fail;
 338     }
 339
 340     createD3D = (pDirect3DCreate9 *)GetProcAddress(ctx->d3dlib, "Direct3DCreate9");
 341     if (!createD3D) {
 342         av_log(NULL, loglevel, "Failed to locate Direct3DCreate9\n");
 343         goto fail;
 344     }
 345     createDeviceManager = (pCreateDeviceManager9 *)GetProcAddress(ctx->dxva2lib, "DXVA2CreateDirect3DDeviceManager9");
 346     if (!createDeviceManager) {
 347         av_log(NULL, loglevel, "Failed to locate DXVA2CreateDirect3DDeviceManager9\n");
 348         goto fail;
 349     }
 350
 351     ctx->d3d9 = createD3D(D3D_SDK_VERSION);
 352     if (!ctx->d3d9) {
 353         av_log(NULL, loglevel, "Failed to create IDirect3D object\n");
 354         goto fail;
 355     }
 356
 357     if (ist->hwaccel_device) {
 358         adapter = atoi(ist->hwaccel_device);
 359         av_log(NULL, AV_LOG_INFO, "Using HWAccel device %d\n", adapter);
 360     }
 361
 362     IDirect3D9_GetAdapterDisplayMode(ctx->d3d9, adapter, &d3ddm);
 363     d3dpp.Windowed         = TRUE;
 364     d3dpp.BackBufferWidth  = 640;
 365     d3dpp.BackBufferHeight = 480;
 366     d3dpp.BackBufferCount  = 0;
 367     d3dpp.BackBufferFormat = d3ddm.Format;
 368     d3dpp.SwapEffect       = D3DSWAPEFFECT_DISCARD;
 369     d3dpp.Flags            = D3DPRESENTFLAG_VIDEO;
 370
 371     hr = IDirect3D9_CreateDevice(ctx->d3d9, adapter, D3DDEVTYPE_HAL, GetDesktopWindow(),
 372                                  D3DCREATE_SOFTWARE_VERTEXPROCESSING | D3DCREATE_MULTITHREADED | D3DCREATE_FPU_PRESERVE,
 373                                  &d3dpp, &ctx->d3d9device);
 374     if (FAILED(hr)) {
 375         av_log(NULL, loglevel, "Failed to create Direct3D device\n");
 376         goto fail;
 377     }
 378
 379     hr = createDeviceManager(&resetToken, &ctx->d3d9devmgr);
 380     if (FAILED(hr)) {
 381         av_log(NULL, loglevel, "Failed to create Direct3D device manager\n");
 382         goto fail;
 383     }
 384
 385     hr = IDirect3DDeviceManager9_ResetDevice(ctx->d3d9devmgr, ctx->d3d9device, resetToken);
 386     if (FAILED(hr)) {
 387         av_log(NULL, loglevel, "Failed to bind Direct3D device to device manager\n");
 388         goto fail;
 389     }
 390
 391     hr = IDirect3DDeviceManager9_OpenDeviceHandle(ctx->d3d9devmgr, &ctx->deviceHandle);
 392     if (FAILED(hr)) {
 393         av_log(NULL, loglevel, "Failed to open device handle\n");
 394         goto fail;
 395     }
 396
 397     hr = IDirect3DDeviceManager9_GetVideoService(ctx->d3d9devmgr, ctx->deviceHandle, &IID_IDirectXVideoDecoderService, (void **)&ctx->decoder_service);
 398     if (FAILED(hr)) {
 399         av_log(NULL, loglevel, "Failed to create IDirectXVideoDecoderService\n");
 400         goto fail;
 401     }
 402
 403     ctx->tmp_frame = av_frame_alloc();
 404     if (!ctx->tmp_frame)
 405         goto fail;
 406
 407     s->hwaccel_context = av_mallocz(sizeof(struct dxva_context));
 408     if (!s->hwaccel_context)
 409         goto fail;
 410
 411     return 0;
 412 fail:
 413     dxva2_uninit(s);
 414     return AVERROR(EINVAL);
 415 }
 416
 417 static int dxva2_get_decoder_configuration(AVCodecContext *s, const GUID *device_guid,
 418                                            const DXVA2_VideoDesc *desc,
 419                                            DXVA2_ConfigPictureDecode *config)
 420 {
 421     InputStream  *ist = s->opaque;
 422     int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
 423     DXVA2Context *ctx = ist->hwaccel_ctx;
 424     unsigned cfg_count = 0, best_score = 0;
 425     DXVA2_ConfigPictureDecode *cfg_list = NULL;
 426     DXVA2_ConfigPictureDecode best_cfg = {{0}};
 427     HRESULT hr;
 428     int i;
 429
 430     hr = IDirectXVideoDecoderService_GetDecoderConfigurations(ctx->decoder_service, device_guid, desc, NULL, &cfg_count, &cfg_list);
 431     if (FAILED(hr)) {
 432         av_log(NULL, loglevel, "Unable to retrieve decoder configurations\n");
 433         return AVERROR(EINVAL);
 434     }
 435
 436     for (i = 0; i < cfg_count; i++) {
 437         DXVA2_ConfigPictureDecode *cfg = &cfg_list[i];
 438
 439         unsigned score;
 440         if (cfg->ConfigBitstreamRaw == 1)
 441             score = 1;
 442         else if (s->codec_id == AV_CODEC_ID_H264 && cfg->ConfigBitstreamRaw == 2)
 443             score = 2;
 444         else
 445             continue;
 446         if (IsEqualGUID(&cfg->guidConfigBitstreamEncryption, &DXVA2_NoEncrypt))
 447             score += 16;
 448         if (score > best_score) {
 449             best_score = score;
 450             best_cfg   = *cfg;
 451         }
 452     }
 453     CoTaskMemFree(cfg_list);
 454
 455     if (!best_score) {
 456         av_log(NULL, loglevel, "No valid decoder configuration available\n");
 457         return AVERROR(EINVAL);
 458     }
 459
 460     *config = best_cfg;
 461     return 0;
 462 }
 463
 464 static int dxva2_create_decoder(AVCodecContext *s)
 465 {
 466     InputStream  *ist = s->opaque;
 467     int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
 468     DXVA2Context *ctx = ist->hwaccel_ctx;
 469     struct dxva_context *dxva_ctx = s->hwaccel_context;
 470     GUID *guid_list = NULL;
 471     unsigned guid_count = 0, i, j;
 472     GUID device_guid = GUID_NULL;
 473     D3DFORMAT target_format = 0;
 474     DXVA2_VideoDesc desc = { 0 };
 475     DXVA2_ConfigPictureDecode config;
 476     HRESULT hr;
 477     int surface_alignment;
 478     int ret;
 479
 480     hr = IDirectXVideoDecoderService_GetDecoderDeviceGuids(ctx->decoder_service, &guid_count, &guid_list);
 481     if (FAILED(hr)) {
 482         av_log(NULL, loglevel, "Failed to retrieve decoder device GUIDs\n");
 483         goto fail;
 484     }
 485
 486     for (i = 0; dxva2_modes[i].guid; i++) {
 487         D3DFORMAT *target_list = NULL;
 488         unsigned target_count = 0;
 489         const dxva2_mode *mode = &dxva2_modes[i];
 490         if (mode->codec != s->codec_id)
 491             continue;
 492
 493         for (j = 0; j < guid_count; j++) {
 494             if (IsEqualGUID(mode->guid, &guid_list[j]))
 495                 break;
 496         }
 497         if (j == guid_count)
 498             continue;
 499
 500         hr = IDirectXVideoDecoderService_GetDecoderRenderTargets(ctx->decoder_service, mode->guid, &target_count, &target_list);
 501         if (FAILED(hr)) {
 502             continue;
 503         }
 504         for (j = 0; j < target_count; j++) {
 505             const D3DFORMAT format = target_list[j];
 506             if (format == MKTAG('N','V','1','2')) {
 507                 target_format = format;
 508                 break;
 509             }
 510         }
 511         CoTaskMemFree(target_list);
 512         if (target_format) {
 513             device_guid = *mode->guid;
 514             break;
 515         }
 516     }
 517     CoTaskMemFree(guid_list);
 518
 519     if (IsEqualGUID(&device_guid, &GUID_NULL)) {
 520         av_log(NULL, loglevel, "No decoder device for codec found\n");
 521         goto fail;
 522     }
 523
 524     desc.SampleWidth  = s->coded_width;
 525     desc.SampleHeight = s->coded_height;
 526     desc.Format       = target_format;
 527
 528     ret = dxva2_get_decoder_configuration(s, &device_guid, &desc, &config);
 529     if (ret < 0) {
 530         goto fail;
 531     }
 532
 533     /* decoding MPEG-2 requires additional alignment on some Intel GPUs,
 534        but it causes issues for H.264 on certain AMD GPUs..... */
 535     if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO)
 536         surface_alignment = 32;
 537     /* the HEVC DXVA2 spec asks for 128 pixel aligned surfaces to ensure
 538        all coding features have enough room to work with */
 539     else if  (s->codec_id == AV_CODEC_ID_HEVC)
 540         surface_alignment = 128;
 541     else
 542         surface_alignment = 16;
 543
 544     /* 4 base work surfaces */
 545     ctx->num_surfaces = 4;
 546
 547     /* add surfaces based on number of possible refs */
 548     if (s->codec_id == AV_CODEC_ID_H264 || s->codec_id == AV_CODEC_ID_HEVC)
 549         ctx->num_surfaces += 16;
 550     else if (s->codec_id == AV_CODEC_ID_VP9)
 551         ctx->num_surfaces += 8;
 552     else
 553         ctx->num_surfaces += 2;
 554
 555     /* add extra surfaces for frame threading */
 556     if (s->active_thread_type & FF_THREAD_FRAME)
 557         ctx->num_surfaces += s->thread_count;
 558
 559     ctx->surfaces      = av_mallocz(ctx->num_surfaces * sizeof(*ctx->surfaces));
 560     ctx->surface_infos = av_mallocz(ctx->num_surfaces * sizeof(*ctx->surface_infos));
 561
 562     if (!ctx->surfaces || !ctx->surface_infos) {
 563         av_log(NULL, loglevel, "Unable to allocate surface arrays\n");
 564         goto fail;
 565     }
 566
 567     hr = IDirectXVideoDecoderService_CreateSurface(ctx->decoder_service,
 568                                                    FFALIGN(s->coded_width, surface_alignment),
 569                                                    FFALIGN(s->coded_height, surface_alignment),
 570                                                    ctx->num_surfaces - 1,
 571                                                    target_format, D3DPOOL_DEFAULT, 0,
 572                                                    DXVA2_VideoDecoderRenderTarget,
 573                                                    ctx->surfaces, NULL);
 574     if (FAILED(hr)) {
 575         av_log(NULL, loglevel, "Failed to create %d video surfaces\n", ctx->num_surfaces);
 576         goto fail;
 577     }
 578
 579     hr = IDirectXVideoDecoderService_CreateVideoDecoder(ctx->decoder_service, &device_guid,
 580                                                         &desc, &config, ctx->surfaces,
 581                                                         ctx->num_surfaces, &ctx->decoder);
 582     if (FAILED(hr)) {
 583         av_log(NULL, loglevel, "Failed to create DXVA2 video decoder\n");
 584         goto fail;
 585     }
 586
 587     ctx->decoder_guid   = device_guid;
 588     ctx->decoder_config = config;
 589
 590     dxva_ctx->cfg           = &ctx->decoder_config;
 591     dxva_ctx->decoder       = ctx->decoder;
 592     dxva_ctx->surface       = ctx->surfaces;
 593     dxva_ctx->surface_count = ctx->num_surfaces;
 594
 595     if (IsEqualGUID(&ctx->decoder_guid, &DXVADDI_Intel_ModeH264_E))
 596         dxva_ctx->workaround |= FF_DXVA2_WORKAROUND_INTEL_CLEARVIDEO;
 597
 598     return 0;
 599 fail:
 600     dxva2_destroy_decoder(s);
 601     return AVERROR(EINVAL);
 602 }
 603
 604 int dxva2_init(AVCodecContext *s)
 605 {
 606     InputStream *ist = s->opaque;
 607     int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
 608     DXVA2Context *ctx;
 609     int ret;
 610
 611     if (!ist->hwaccel_ctx) {
 612         ret = dxva2_alloc(s);
 613         if (ret < 0)
 614             return ret;
 615     }
 616     ctx = ist->hwaccel_ctx;
 617
 618     if (s->codec_id == AV_CODEC_ID_H264 &&
 619         (s->profile & ~FF_PROFILE_H264_CONSTRAINED) > FF_PROFILE_H264_HIGH) {
 620         av_log(NULL, loglevel, "Unsupported H.264 profile for DXVA2 HWAccel: %d\n", s->profile);
 621         return AVERROR(EINVAL);
 622     }
 623
 624     if (ctx->decoder)
 625         dxva2_destroy_decoder(s);
 626
 627     ret = dxva2_create_decoder(s);
 628     if (ret < 0) {
 629         av_log(NULL, loglevel, "Error creating the DXVA2 decoder\n");
 630         return ret;
 631     }
 632
 633     return 0;
 634 }