libavcodec/vaapi_decode.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 "libavutil/avassert.h"
  20 #include "libavutil/common.h"
  21 #include "libavutil/pixdesc.h"
  22
  23 #include "avcodec.h"
  24 #include "decode.h"
  25 #include "internal.h"
  26 #include "vaapi_decode.h"
  27
  28
  29 int ff_vaapi_decode_make_param_buffer(AVCodecContext *avctx,
  30                                       VAAPIDecodePicture *pic,
  31                                       int type,
  32                                       const void *data,
  33                                       size_t size)
  34 {
  35     VAAPIDecodeContext *ctx = avctx->internal->hwaccel_priv_data;
  36     VAStatus vas;
  37     VABufferID buffer;
  38
  39     av_assert0(pic->nb_param_buffers + 1 <= MAX_PARAM_BUFFERS);
  40
  41     vas = vaCreateBuffer(ctx->hwctx->display, ctx->va_context,
  42                          type, size, 1, (void*)data, &buffer);
  43     if (vas != VA_STATUS_SUCCESS) {
  44         av_log(avctx, AV_LOG_ERROR, "Failed to create parameter "
  45                "buffer (type %d): %d (%s).\n",
  46                type, vas, vaErrorStr(vas));
  47         return AVERROR(EIO);
  48     }
  49
  50     pic->param_buffers[pic->nb_param_buffers++] = buffer;
  51
  52     av_log(avctx, AV_LOG_DEBUG, "Param buffer (type %d, %zu bytes) "
  53            "is %#x.\n", type, size, buffer);
  54     return 0;
  55 }
  56
  57
  58 int ff_vaapi_decode_make_slice_buffer(AVCodecContext *avctx,
  59                                       VAAPIDecodePicture *pic,
  60                                       const void *params_data,
  61                                       size_t params_size,
  62                                       const void *slice_data,
  63                                       size_t slice_size)
  64 {
  65     VAAPIDecodeContext *ctx = avctx->internal->hwaccel_priv_data;
  66     VAStatus vas;
  67     int index;
  68
  69     av_assert0(pic->nb_slices <= pic->slices_allocated);
  70     if (pic->nb_slices == pic->slices_allocated) {
  71         if (pic->slices_allocated > 0)
  72             pic->slices_allocated *= 2;
  73         else
  74             pic->slices_allocated = 64;
  75
  76         pic->slice_buffers =
  77             av_realloc_array(pic->slice_buffers,
  78                              pic->slices_allocated,
  79                              2 * sizeof(*pic->slice_buffers));
  80         if (!pic->slice_buffers)
  81             return AVERROR(ENOMEM);
  82     }
  83     av_assert0(pic->nb_slices + 1 <= pic->slices_allocated);
  84
  85     index = 2 * pic->nb_slices;
  86
  87     vas = vaCreateBuffer(ctx->hwctx->display, ctx->va_context,
  88                          VASliceParameterBufferType,
  89                          params_size, 1, (void*)params_data,
  90                          &pic->slice_buffers[index]);
  91     if (vas != VA_STATUS_SUCCESS) {
  92         av_log(avctx, AV_LOG_ERROR, "Failed to create slice "
  93                "parameter buffer: %d (%s).\n", vas, vaErrorStr(vas));
  94         return AVERROR(EIO);
  95     }
  96
  97     av_log(avctx, AV_LOG_DEBUG, "Slice %d param buffer (%zu bytes) "
  98            "is %#x.\n", pic->nb_slices, params_size,
  99            pic->slice_buffers[index]);
 100
 101     vas = vaCreateBuffer(ctx->hwctx->display, ctx->va_context,
 102                          VASliceDataBufferType,
 103                          slice_size, 1, (void*)slice_data,
 104                          &pic->slice_buffers[index + 1]);
 105     if (vas != VA_STATUS_SUCCESS) {
 106         av_log(avctx, AV_LOG_ERROR, "Failed to create slice "
 107                "data buffer (size %zu): %d (%s).\n",
 108                slice_size, vas, vaErrorStr(vas));
 109         vaDestroyBuffer(ctx->hwctx->display,
 110                         pic->slice_buffers[index]);
 111         return AVERROR(EIO);
 112     }
 113
 114     av_log(avctx, AV_LOG_DEBUG, "Slice %d data buffer (%zu bytes) "
 115            "is %#x.\n", pic->nb_slices, slice_size,
 116            pic->slice_buffers[index + 1]);
 117
 118     ++pic->nb_slices;
 119     return 0;
 120 }
 121
 122 static void ff_vaapi_decode_destroy_buffers(AVCodecContext *avctx,
 123                                             VAAPIDecodePicture *pic)
 124 {
 125     VAAPIDecodeContext *ctx = avctx->internal->hwaccel_priv_data;
 126     VAStatus vas;
 127     int i;
 128
 129     for (i = 0; i < pic->nb_param_buffers; i++) {
 130         vas = vaDestroyBuffer(ctx->hwctx->display,
 131                               pic->param_buffers[i]);
 132         if (vas != VA_STATUS_SUCCESS) {
 133             av_log(avctx, AV_LOG_ERROR, "Failed to destroy "
 134                    "parameter buffer %#x: %d (%s).\n",
 135                    pic->param_buffers[i], vas, vaErrorStr(vas));
 136         }
 137     }
 138
 139     for (i = 0; i < 2 * pic->nb_slices; i++) {
 140         vas = vaDestroyBuffer(ctx->hwctx->display,
 141                               pic->slice_buffers[i]);
 142         if (vas != VA_STATUS_SUCCESS) {
 143             av_log(avctx, AV_LOG_ERROR, "Failed to destroy slice "
 144                    "slice buffer %#x: %d (%s).\n",
 145                    pic->slice_buffers[i], vas, vaErrorStr(vas));
 146         }
 147     }
 148 }
 149
 150 int ff_vaapi_decode_issue(AVCodecContext *avctx,
 151                           VAAPIDecodePicture *pic)
 152 {
 153     VAAPIDecodeContext *ctx = avctx->internal->hwaccel_priv_data;
 154     VAStatus vas;
 155     int err;
 156
 157     av_log(avctx, AV_LOG_DEBUG, "Decode to surface %#x.\n",
 158            pic->output_surface);
 159
 160     vas = vaBeginPicture(ctx->hwctx->display, ctx->va_context,
 161                          pic->output_surface);
 162     if (vas != VA_STATUS_SUCCESS) {
 163         av_log(avctx, AV_LOG_ERROR, "Failed to begin picture decode "
 164                "issue: %d (%s).\n", vas, vaErrorStr(vas));
 165         err = AVERROR(EIO);
 166         goto fail_with_picture;
 167     }
 168
 169     vas = vaRenderPicture(ctx->hwctx->display, ctx->va_context,
 170                           pic->param_buffers, pic->nb_param_buffers);
 171     if (vas != VA_STATUS_SUCCESS) {
 172         av_log(avctx, AV_LOG_ERROR, "Failed to upload decode "
 173                "parameters: %d (%s).\n", vas, vaErrorStr(vas));
 174         err = AVERROR(EIO);
 175         goto fail_with_picture;
 176     }
 177
 178     vas = vaRenderPicture(ctx->hwctx->display, ctx->va_context,
 179                           pic->slice_buffers, 2 * pic->nb_slices);
 180     if (vas != VA_STATUS_SUCCESS) {
 181         av_log(avctx, AV_LOG_ERROR, "Failed to upload slices: "
 182                "%d (%s).\n", vas, vaErrorStr(vas));
 183         err = AVERROR(EIO);
 184         goto fail_with_picture;
 185     }
 186
 187     vas = vaEndPicture(ctx->hwctx->display, ctx->va_context);
 188     if (vas != VA_STATUS_SUCCESS) {
 189         av_log(avctx, AV_LOG_ERROR, "Failed to end picture decode "
 190                "issue: %d (%s).\n", vas, vaErrorStr(vas));
 191         err = AVERROR(EIO);
 192         if (ctx->hwctx->driver_quirks &
 193             AV_VAAPI_DRIVER_QUIRK_RENDER_PARAM_BUFFERS)
 194             goto fail;
 195         else
 196             goto fail_at_end;
 197     }
 198
 199     if (ctx->hwctx->driver_quirks &
 200         AV_VAAPI_DRIVER_QUIRK_RENDER_PARAM_BUFFERS)
 201         ff_vaapi_decode_destroy_buffers(avctx, pic);
 202
 203     pic->nb_param_buffers = 0;
 204     pic->nb_slices        = 0;
 205     pic->slices_allocated = 0;
 206     av_freep(&pic->slice_buffers);
 207
 208     return 0;
 209
 210 fail_with_picture:
 211     vas = vaEndPicture(ctx->hwctx->display, ctx->va_context);
 212     if (vas != VA_STATUS_SUCCESS) {
 213         av_log(avctx, AV_LOG_ERROR, "Failed to end picture decode "
 214                "after error: %d (%s).\n", vas, vaErrorStr(vas));
 215     }
 216 fail:
 217     ff_vaapi_decode_destroy_buffers(avctx, pic);
 218 fail_at_end:
 219     return err;
 220 }
 221
 222 int ff_vaapi_decode_cancel(AVCodecContext *avctx,
 223                            VAAPIDecodePicture *pic)
 224 {
 225     ff_vaapi_decode_destroy_buffers(avctx, pic);
 226
 227     pic->nb_param_buffers = 0;
 228     pic->nb_slices        = 0;
 229     pic->slices_allocated = 0;
 230     av_freep(&pic->slice_buffers);
 231
 232     return 0;
 233 }
 234
 235 static const struct {
 236     enum AVCodecID codec_id;
 237     int codec_profile;
 238     VAProfile va_profile;
 239 } vaapi_profile_map[] = {
 240 #define MAP(c, p, v) { AV_CODEC_ID_ ## c, FF_PROFILE_ ## p, VAProfile ## v }
 241     MAP(MPEG2VIDEO,  MPEG2_SIMPLE,    MPEG2Simple ),
 242     MAP(MPEG2VIDEO,  MPEG2_MAIN,      MPEG2Main   ),
 243     MAP(H263,        UNKNOWN,         H263Baseline),
 244     MAP(MPEG4,       MPEG4_SIMPLE,    MPEG4Simple ),
 245     MAP(MPEG4,       MPEG4_ADVANCED_SIMPLE,
 246                                MPEG4AdvancedSimple),
 247     MAP(MPEG4,       MPEG4_MAIN,      MPEG4Main   ),
 248     MAP(H264,        H264_CONSTRAINED_BASELINE,
 249                            H264ConstrainedBaseline),
 250     MAP(H264,        H264_MAIN,       H264Main    ),
 251     MAP(H264,        H264_HIGH,       H264High    ),
 252 #if VA_CHECK_VERSION(0, 37, 0)
 253     MAP(HEVC,        HEVC_MAIN,       HEVCMain    ),
 254     MAP(HEVC,        HEVC_MAIN_10,    HEVCMain10  ),
 255 #endif
 256     MAP(WMV3,        VC1_SIMPLE,      VC1Simple   ),
 257     MAP(WMV3,        VC1_MAIN,        VC1Main     ),
 258     MAP(WMV3,        VC1_COMPLEX,     VC1Advanced ),
 259     MAP(WMV3,        VC1_ADVANCED,    VC1Advanced ),
 260     MAP(VC1,         VC1_SIMPLE,      VC1Simple   ),
 261     MAP(VC1,         VC1_MAIN,        VC1Main     ),
 262     MAP(VC1,         VC1_COMPLEX,     VC1Advanced ),
 263     MAP(VC1,         VC1_ADVANCED,    VC1Advanced ),
 264 #if VA_CHECK_VERSION(0, 35, 0)
 265     MAP(VP8,         UNKNOWN,       VP8Version0_3 ),
 266 #endif
 267 #if VA_CHECK_VERSION(0, 38, 0)
 268     MAP(VP9,         VP9_0,           VP9Profile0 ),
 269 #endif
 270 #undef MAP
 271 };
 272
 273 /*
 274  * Set *va_config and the frames_ref fields from the current codec parameters
 275  * in avctx.
 276  */
 277 static int vaapi_decode_make_config(AVCodecContext *avctx,
 278                                     AVBufferRef *device_ref,
 279                                     VAConfigID *va_config,
 280                                     AVBufferRef *frames_ref)
 281 {
 282     AVVAAPIHWConfig       *hwconfig    = NULL;
 283     AVHWFramesConstraints *constraints = NULL;
 284     VAStatus vas;
 285     int err, i, j;
 286     const AVCodecDescriptor *codec_desc;
 287     VAProfile profile, *profile_list = NULL;
 288     int profile_count, exact_match, alt_profile;
 289     const AVPixFmtDescriptor *sw_desc, *desc;
 290
 291     AVHWDeviceContext    *device = (AVHWDeviceContext*)device_ref->data;
 292     AVVAAPIDeviceContext *hwctx = device->hwctx;
 293
 294     codec_desc = avcodec_descriptor_get(avctx->codec_id);
 295     if (!codec_desc) {
 296         err = AVERROR(EINVAL);
 297         goto fail;
 298     }
 299
 300     profile_count = vaMaxNumProfiles(hwctx->display);
 301     profile_list  = av_malloc_array(profile_count,
 302                                     sizeof(VAProfile));
 303     if (!profile_list) {
 304         err = AVERROR(ENOMEM);
 305         goto fail;
 306     }
 307
 308     vas = vaQueryConfigProfiles(hwctx->display,
 309                                 profile_list, &profile_count);
 310     if (vas != VA_STATUS_SUCCESS) {
 311         av_log(avctx, AV_LOG_ERROR, "Failed to query profiles: "
 312                "%d (%s).\n", vas, vaErrorStr(vas));
 313         err = AVERROR(ENOSYS);
 314         goto fail;
 315     }
 316
 317     profile = VAProfileNone;
 318     exact_match = 0;
 319
 320     for (i = 0; i < FF_ARRAY_ELEMS(vaapi_profile_map); i++) {
 321         int profile_match = 0;
 322         if (avctx->codec_id != vaapi_profile_map[i].codec_id)
 323             continue;
 324         if (avctx->profile == vaapi_profile_map[i].codec_profile ||
 325             vaapi_profile_map[i].codec_profile == FF_PROFILE_UNKNOWN)
 326             profile_match = 1;
 327         profile = vaapi_profile_map[i].va_profile;
 328         for (j = 0; j < profile_count; j++) {
 329             if (profile == profile_list[j]) {
 330                 exact_match = profile_match;
 331                 break;
 332             }
 333         }
 334         if (j < profile_count) {
 335             if (exact_match)
 336                 break;
 337             alt_profile = vaapi_profile_map[i].codec_profile;
 338         }
 339     }
 340     av_freep(&profile_list);
 341
 342     if (profile == VAProfileNone) {
 343         av_log(avctx, AV_LOG_ERROR, "No support for codec %s "
 344                "profile %d.\n", codec_desc->name, avctx->profile);
 345         err = AVERROR(ENOSYS);
 346         goto fail;
 347     }
 348     if (!exact_match) {
 349         if (avctx->hwaccel_flags &
 350             AV_HWACCEL_FLAG_ALLOW_PROFILE_MISMATCH) {
 351             av_log(avctx, AV_LOG_VERBOSE, "Codec %s profile %d not "
 352                    "supported for hardware decode.\n",
 353                    codec_desc->name, avctx->profile);
 354             av_log(avctx, AV_LOG_WARNING, "Using possibly-"
 355                    "incompatible profile %d instead.\n",
 356                    alt_profile);
 357         } else {
 358             av_log(avctx, AV_LOG_VERBOSE, "Codec %s profile %d not "
 359                    "supported for hardware decode.\n",
 360                    codec_desc->name, avctx->profile);
 361             err = AVERROR(EINVAL);
 362             goto fail;
 363         }
 364     }
 365
 366     vas = vaCreateConfig(hwctx->display, profile,
 367                          VAEntrypointVLD, NULL, 0,
 368                          va_config);
 369     if (vas != VA_STATUS_SUCCESS) {
 370         av_log(avctx, AV_LOG_ERROR, "Failed to create decode "
 371                "configuration: %d (%s).\n", vas, vaErrorStr(vas));
 372         err = AVERROR(EIO);
 373         goto fail;
 374     }
 375
 376     hwconfig = av_hwdevice_hwconfig_alloc(device_ref);
 377     if (!hwconfig) {
 378         err = AVERROR(ENOMEM);
 379         goto fail;
 380     }
 381     hwconfig->config_id = *va_config;
 382
 383     constraints =
 384         av_hwdevice_get_hwframe_constraints(device_ref, hwconfig);
 385     if (!constraints) {
 386         err = AVERROR(ENOMEM);
 387         goto fail;
 388     }
 389
 390     if (avctx->coded_width  < constraints->min_width  ||
 391         avctx->coded_height < constraints->min_height ||
 392         avctx->coded_width  > constraints->max_width  ||
 393         avctx->coded_height > constraints->max_height) {
 394         av_log(avctx, AV_LOG_ERROR, "Hardware does not support image "
 395                "size %dx%d (constraints: width %d-%d height %d-%d).\n",
 396                avctx->coded_width, avctx->coded_height,
 397                constraints->min_width,  constraints->max_width,
 398                constraints->min_height, constraints->max_height);
 399         err = AVERROR(EINVAL);
 400         goto fail;
 401     }
 402     if (!constraints->valid_sw_formats ||
 403         constraints->valid_sw_formats[0] == AV_PIX_FMT_NONE) {
 404         av_log(avctx, AV_LOG_ERROR, "Hardware does not offer any "
 405                "usable surface formats.\n");
 406         err = AVERROR(EINVAL);
 407         goto fail;
 408     }
 409
 410     if (frames_ref) {
 411         AVHWFramesContext *frames = (AVHWFramesContext *)frames_ref->data;
 412
 413         frames->format = AV_PIX_FMT_VAAPI;
 414         frames->width = avctx->coded_width;
 415         frames->height = avctx->coded_height;
 416
 417         // Find the first format in the list which matches the expected
 418         // bit depth and subsampling.  If none are found (this can happen
 419         // when 10-bit streams are decoded to 8-bit surfaces, for example)
 420         // then just take the first format on the list.
 421         frames->sw_format = constraints->valid_sw_formats[0];
 422         sw_desc = av_pix_fmt_desc_get(avctx->sw_pix_fmt);
 423         for (i = 0; constraints->valid_sw_formats[i] != AV_PIX_FMT_NONE; i++) {
 424             desc = av_pix_fmt_desc_get(constraints->valid_sw_formats[i]);
 425             if (desc->nb_components != sw_desc->nb_components ||
 426                 desc->log2_chroma_w != sw_desc->log2_chroma_w ||
 427                 desc->log2_chroma_h != sw_desc->log2_chroma_h)
 428                 continue;
 429             for (j = 0; j < desc->nb_components; j++) {
 430                 if (desc->comp[j].depth != sw_desc->comp[j].depth)
 431                     break;
 432             }
 433             if (j < desc->nb_components)
 434                 continue;
 435             frames->sw_format = constraints->valid_sw_formats[i];
 436             break;
 437         }
 438
 439         frames->initial_pool_size = 1;
 440         // Add per-codec number of surfaces used for storing reference frames.
 441         switch (avctx->codec_id) {
 442         case AV_CODEC_ID_H264:
 443         case AV_CODEC_ID_HEVC:
 444             frames->initial_pool_size += 16;
 445             break;
 446         case AV_CODEC_ID_VP9:
 447             frames->initial_pool_size += 8;
 448             break;
 449         case AV_CODEC_ID_VP8:
 450             frames->initial_pool_size += 3;
 451             break;
 452         default:
 453             frames->initial_pool_size += 2;
 454         }
 455     }
 456
 457     av_hwframe_constraints_free(&constraints);
 458     av_freep(&hwconfig);
 459
 460     return 0;
 461
 462 fail:
 463     av_hwframe_constraints_free(&constraints);
 464     av_freep(&hwconfig);
 465     if (*va_config != VA_INVALID_ID) {
 466         vaDestroyConfig(hwctx->display, *va_config);
 467         *va_config = VA_INVALID_ID;
 468     }
 469     av_freep(&profile_list);
 470     return err;
 471 }
 472
 473 int ff_vaapi_common_frame_params(AVCodecContext *avctx,
 474                                  AVBufferRef *hw_frames_ctx)
 475 {
 476     AVHWFramesContext *hw_frames = (AVHWFramesContext *)hw_frames_ctx->data;
 477     AVHWDeviceContext *device_ctx = hw_frames->device_ctx;
 478     AVVAAPIDeviceContext *hwctx;
 479     VAConfigID va_config = VA_INVALID_ID;
 480     int err;
 481
 482     if (device_ctx->type != AV_HWDEVICE_TYPE_VAAPI)
 483         return AVERROR(EINVAL);
 484     hwctx = device_ctx->hwctx;
 485
 486     err = vaapi_decode_make_config(avctx, hw_frames->device_ref, &va_config,
 487                                    hw_frames_ctx);
 488     if (err)
 489         return err;
 490
 491     if (va_config != VA_INVALID_ID)
 492         vaDestroyConfig(hwctx->display, va_config);
 493
 494     return 0;
 495 }
 496
 497 int ff_vaapi_decode_init(AVCodecContext *avctx)
 498 {
 499     VAAPIDecodeContext *ctx = avctx->internal->hwaccel_priv_data;
 500     VAStatus vas;
 501     int err;
 502
 503     ctx->va_config  = VA_INVALID_ID;
 504     ctx->va_context = VA_INVALID_ID;
 505
 506 #if FF_API_VAAPI_CONTEXT
 507     if (avctx->hwaccel_context) {
 508         av_log(avctx, AV_LOG_WARNING, "Using deprecated struct "
 509                "vaapi_context in decode.\n");
 510
 511         ctx->have_old_context = 1;
 512         ctx->old_context = avctx->hwaccel_context;
 513
 514         // Really we only want the VAAPI device context, but this
 515         // allocates a whole generic device context because we don't
 516         // have any other way to determine how big it should be.
 517         ctx->device_ref =
 518             av_hwdevice_ctx_alloc(AV_HWDEVICE_TYPE_VAAPI);
 519         if (!ctx->device_ref) {
 520             err = AVERROR(ENOMEM);
 521             goto fail;
 522         }
 523         ctx->device = (AVHWDeviceContext*)ctx->device_ref->data;
 524         ctx->hwctx  = ctx->device->hwctx;
 525
 526         ctx->hwctx->display = ctx->old_context->display;
 527
 528         // The old VAAPI decode setup assumed this quirk was always
 529         // present, so set it here to avoid the behaviour changing.
 530         ctx->hwctx->driver_quirks =
 531             AV_VAAPI_DRIVER_QUIRK_RENDER_PARAM_BUFFERS;
 532
 533     }
 534 #endif
 535
 536 #if FF_API_VAAPI_CONTEXT
 537     if (ctx->have_old_context) {
 538         ctx->va_config  = ctx->old_context->config_id;
 539         ctx->va_context = ctx->old_context->context_id;
 540
 541         av_log(avctx, AV_LOG_DEBUG, "Using user-supplied decoder "
 542                "context: %#x/%#x.\n", ctx->va_config, ctx->va_context);
 543     } else {
 544 #endif
 545
 546     err = ff_decode_get_hw_frames_ctx(avctx, AV_HWDEVICE_TYPE_VAAPI);
 547     if (err < 0)
 548         goto fail;
 549
 550     ctx->frames = (AVHWFramesContext*)avctx->hw_frames_ctx->data;
 551     ctx->hwfc   = ctx->frames->hwctx;
 552     ctx->device = ctx->frames->device_ctx;
 553     ctx->hwctx  = ctx->device->hwctx;
 554
 555     err = vaapi_decode_make_config(avctx, ctx->frames->device_ref,
 556                                    &ctx->va_config, avctx->hw_frames_ctx);
 557     if (err)
 558         goto fail;
 559
 560     vas = vaCreateContext(ctx->hwctx->display, ctx->va_config,
 561                           avctx->coded_width, avctx->coded_height,
 562                           VA_PROGRESSIVE,
 563                           ctx->hwfc->surface_ids,
 564                           ctx->hwfc->nb_surfaces,
 565                           &ctx->va_context);
 566     if (vas != VA_STATUS_SUCCESS) {
 567         av_log(avctx, AV_LOG_ERROR, "Failed to create decode "
 568                "context: %d (%s).\n", vas, vaErrorStr(vas));
 569         err = AVERROR(EIO);
 570         goto fail;
 571     }
 572
 573     av_log(avctx, AV_LOG_DEBUG, "Decode context initialised: "
 574            "%#x/%#x.\n", ctx->va_config, ctx->va_context);
 575 #if FF_API_VAAPI_CONTEXT
 576     }
 577 #endif
 578
 579     return 0;
 580
 581 fail:
 582     ff_vaapi_decode_uninit(avctx);
 583     return err;
 584 }
 585
 586 int ff_vaapi_decode_uninit(AVCodecContext *avctx)
 587 {
 588     VAAPIDecodeContext *ctx = avctx->internal->hwaccel_priv_data;
 589     VAStatus vas;
 590
 591 #if FF_API_VAAPI_CONTEXT
 592     if (ctx->have_old_context) {
 593         av_buffer_unref(&ctx->device_ref);
 594     } else {
 595 #endif
 596
 597     if (ctx->va_context != VA_INVALID_ID) {
 598         vas = vaDestroyContext(ctx->hwctx->display, ctx->va_context);
 599         if (vas != VA_STATUS_SUCCESS) {
 600             av_log(avctx, AV_LOG_ERROR, "Failed to destroy decode "
 601                    "context %#x: %d (%s).\n",
 602                    ctx->va_context, vas, vaErrorStr(vas));
 603         }
 604     }
 605     if (ctx->va_config != VA_INVALID_ID) {
 606         vas = vaDestroyConfig(ctx->hwctx->display, ctx->va_config);
 607         if (vas != VA_STATUS_SUCCESS) {
 608             av_log(avctx, AV_LOG_ERROR, "Failed to destroy decode "
 609                    "configuration %#x: %d (%s).\n",
 610                    ctx->va_config, vas, vaErrorStr(vas));
 611         }
 612     }
 613
 614 #if FF_API_VAAPI_CONTEXT
 615     }
 616 #endif
 617
 618     return 0;
 619 }