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