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ffmpeg_dxva2.c
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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;
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 {
98 
100 
101  IDirect3D9 *d3d9;
102  IDirect3DDevice9 *d3d9device;
103  IDirect3DDeviceManager9 *d3d9devmgr;
104  IDirectXVideoDecoderService *decoder_service;
105  IDirectXVideoDecoder *decoder;
106 
108  DXVA2_ConfigPictureDecode decoder_config;
109 
110  LPDIRECT3DSURFACE9 *surfaces;
112  uint32_t num_surfaces;
113  uint64_t surface_age;
114 
116 } DXVA2Context;
117 
118 typedef struct DXVA2SurfaceWrapper {
120  LPDIRECT3DSURFACE9 surface;
121  IDirectXVideoDecoder *decoder;
123 
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 
148 {
149  InputStream *ist = s->opaque;
150  DXVA2Context *ctx = ist->hwaccel_ctx;
151 
152  ist->hwaccel_uninit = NULL;
153  ist->hwaccel_get_buffer = NULL;
155 
156  if (ctx->decoder)
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);
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 
204 {
205  InputStream *ist = s->opaque;
206  DXVA2Context *ctx = ist->hwaccel_ctx;
207  int i, old_unused = -1;
208  LPDIRECT3DSURFACE9 surface;
210 
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,
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 
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 
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 
319 
320  ist->hwaccel_ctx = ctx;
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 
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..... */
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 */
545  ctx->num_surfaces += 16;
546  else
547  ctx->num_surfaces += 2;
548 
549  /* add extra surfaces for frame threading */
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))
591 
592  return 0;
593 fail:
595  return AVERROR(EINVAL);
596 }
597 
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 &&
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)
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 }