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 "internal.h"
  25 #include "vaapi_decode.h"
  26
  27
  28 int ff_vaapi_decode_make_param_buffer(AVCodecContext *avctx,
  29                                       VAAPIDecodePicture *pic,
  30                                       int type,
  31                                       const void *data,
  32                                       size_t size)
  33 {
  34     VAAPIDecodeContext *ctx = avctx->internal->hwaccel_priv_data;
  35     VAStatus vas;
  36     VABufferID buffer;
  37
  38     av_assert0(pic->nb_param_buffers + 1 <= MAX_PARAM_BUFFERS);
  39
  40     vas = vaCreateBuffer(ctx->hwctx->display, ctx->va_context,
  41                          type, size, 1, (void*)data, &buffer);
  42     if (vas != VA_STATUS_SUCCESS) {
  43         av_log(avctx, AV_LOG_ERROR, "Failed to create parameter "
  44                "buffer (type %d): %d (%s).\n",
  45                type, vas, vaErrorStr(vas));
  46         return AVERROR(EIO);
  47     }
  48
  49     pic->param_buffers[pic->nb_param_buffers++] = buffer;
  50
  51     av_log(avctx, AV_LOG_DEBUG, "Param buffer (type %d, %zu bytes) "
  52            "is %#x.\n", type, size, buffer);
  53     return 0;
  54 }
  55
  56
  57 int ff_vaapi_decode_make_slice_buffer(AVCodecContext *avctx,
  58                                       VAAPIDecodePicture *pic,
  59                                       const void *params_data,
  60                                       size_t params_size,
  61                                       const void *slice_data,
  62                                       size_t slice_size)
  63 {
  64     VAAPIDecodeContext *ctx = avctx->internal->hwaccel_priv_data;
  65     VAStatus vas;
  66     int index;
  67
  68     av_assert0(pic->nb_slices <= pic->slices_allocated);
  69     if (pic->nb_slices == pic->slices_allocated) {
  70         if (pic->slices_allocated > 0)
  71             pic->slices_allocated *= 2;
  72         else
  73             pic->slices_allocated = 64;
  74
  75         pic->slice_buffers =
  76             av_realloc_array(pic->slice_buffers,
  77                              pic->slices_allocated,
  78                              2 * sizeof(*pic->slice_buffers));
  79         if (!pic->slice_buffers)
  80             return AVERROR(ENOMEM);
  81     }
  82     av_assert0(pic->nb_slices + 1 <= pic->slices_allocated);
  83
  84     index = 2 * pic->nb_slices;
  85
  86     vas = vaCreateBuffer(ctx->hwctx->display, ctx->va_context,
  87                          VASliceParameterBufferType,
  88                          params_size, 1, (void*)params_data,
  89                          &pic->slice_buffers[index]);
  90     if (vas != VA_STATUS_SUCCESS) {
  91         av_log(avctx, AV_LOG_ERROR, "Failed to create slice "
  92                "parameter buffer: %d (%s).\n", vas, vaErrorStr(vas));
  93         return AVERROR(EIO);
  94     }
  95
  96     av_log(avctx, AV_LOG_DEBUG, "Slice %d param buffer (%zu bytes) "
  97            "is %#x.\n", pic->nb_slices, params_size,
  98            pic->slice_buffers[index]);
  99
 100     vas = vaCreateBuffer(ctx->hwctx->display, ctx->va_context,
 101                          VASliceDataBufferType,
 102                          slice_size, 1, (void*)slice_data,
 103                          &pic->slice_buffers[index + 1]);
 104     if (vas != VA_STATUS_SUCCESS) {
 105         av_log(avctx, AV_LOG_ERROR, "Failed to create slice "
 106                "data buffer (size %zu): %d (%s).\n",
 107                slice_size, vas, vaErrorStr(vas));
 108         vaDestroyBuffer(ctx->hwctx->display,
 109                         pic->slice_buffers[index]);
 110         return AVERROR(EIO);
 111     }
 112
 113     av_log(avctx, AV_LOG_DEBUG, "Slice %d data buffer (%zu bytes) "
 114            "is %#x.\n", pic->nb_slices, slice_size,
 115            pic->slice_buffers[index + 1]);
 116
 117     ++pic->nb_slices;
 118     return 0;
 119 }
 120
 121 static void ff_vaapi_decode_destroy_buffers(AVCodecContext *avctx,
 122                                             VAAPIDecodePicture *pic)
 123 {
 124     VAAPIDecodeContext *ctx = avctx->internal->hwaccel_priv_data;
 125     VAStatus vas;
 126     int i;
 127
 128     for (i = 0; i < pic->nb_param_buffers; i++) {
 129         vas = vaDestroyBuffer(ctx->hwctx->display,
 130                               pic->param_buffers[i]);
 131         if (vas != VA_STATUS_SUCCESS) {
 132             av_log(avctx, AV_LOG_ERROR, "Failed to destroy "
 133                    "parameter buffer %#x: %d (%s).\n",
 134                    pic->param_buffers[i], vas, vaErrorStr(vas));
 135         }
 136     }
 137
 138     for (i = 0; i < 2 * pic->nb_slices; i++) {
 139         vas = vaDestroyBuffer(ctx->hwctx->display,
 140                               pic->slice_buffers[i]);
 141         if (vas != VA_STATUS_SUCCESS) {
 142             av_log(avctx, AV_LOG_ERROR, "Failed to destroy slice "
 143                    "slice buffer %#x: %d (%s).\n",
 144                    pic->slice_buffers[i], vas, vaErrorStr(vas));
 145         }
 146     }
 147 }
 148
 149 int ff_vaapi_decode_issue(AVCodecContext *avctx,
 150                           VAAPIDecodePicture *pic)
 151 {
 152     VAAPIDecodeContext *ctx = avctx->internal->hwaccel_priv_data;
 153     VAStatus vas;
 154     int err;
 155
 156     av_log(avctx, AV_LOG_DEBUG, "Decode to surface %#x.\n",
 157            pic->output_surface);
 158
 159     vas = vaBeginPicture(ctx->hwctx->display, ctx->va_context,
 160                          pic->output_surface);
 161     if (vas != VA_STATUS_SUCCESS) {
 162         av_log(avctx, AV_LOG_ERROR, "Failed to begin picture decode "
 163                "issue: %d (%s).\n", vas, vaErrorStr(vas));
 164         err = AVERROR(EIO);
 165         goto fail_with_picture;
 166     }
 167
 168     vas = vaRenderPicture(ctx->hwctx->display, ctx->va_context,
 169                           pic->param_buffers, pic->nb_param_buffers);
 170     if (vas != VA_STATUS_SUCCESS) {
 171         av_log(avctx, AV_LOG_ERROR, "Failed to upload decode "
 172                "parameters: %d (%s).\n", vas, vaErrorStr(vas));
 173         err = AVERROR(EIO);
 174         goto fail_with_picture;
 175     }
 176
 177     vas = vaRenderPicture(ctx->hwctx->display, ctx->va_context,
 178                           pic->slice_buffers, 2 * pic->nb_slices);
 179     if (vas != VA_STATUS_SUCCESS) {
 180         av_log(avctx, AV_LOG_ERROR, "Failed to upload slices: "
 181                "%d (%s).\n", vas, vaErrorStr(vas));
 182         err = AVERROR(EIO);
 183         goto fail_with_picture;
 184     }
 185
 186     vas = vaEndPicture(ctx->hwctx->display, ctx->va_context);
 187     if (vas != VA_STATUS_SUCCESS) {
 188         av_log(avctx, AV_LOG_ERROR, "Failed to end picture decode "
 189                "issue: %d (%s).\n", vas, vaErrorStr(vas));
 190         err = AVERROR(EIO);
 191         if (ctx->hwctx->driver_quirks &
 192             AV_VAAPI_DRIVER_QUIRK_RENDER_PARAM_BUFFERS)
 193             goto fail;
 194         else
 195             goto fail_at_end;
 196     }
 197
 198     if (ctx->hwctx->driver_quirks &
 199         AV_VAAPI_DRIVER_QUIRK_RENDER_PARAM_BUFFERS)
 200         ff_vaapi_decode_destroy_buffers(avctx, pic);
 201
 202     pic->nb_param_buffers = 0;
 203     pic->nb_slices        = 0;
 204     pic->slices_allocated = 0;
 205     av_freep(&pic->slice_buffers);
 206
 207     return 0;
 208
 209 fail_with_picture:
 210     vas = vaEndPicture(ctx->hwctx->display, ctx->va_context);
 211     if (vas != VA_STATUS_SUCCESS) {
 212         av_log(avctx, AV_LOG_ERROR, "Failed to end picture decode "
 213                "after error: %d (%s).\n", vas, vaErrorStr(vas));
 214     }
 215 fail:
 216     ff_vaapi_decode_destroy_buffers(avctx, pic);
 217 fail_at_end:
 218     return err;
 219 }
 220
 221 int ff_vaapi_decode_cancel(AVCodecContext *avctx,
 222                            VAAPIDecodePicture *pic)
 223 {
 224     ff_vaapi_decode_destroy_buffers(avctx, pic);
 225
 226     pic->nb_param_buffers = 0;
 227     pic->nb_slices        = 0;
 228     pic->slices_allocated = 0;
 229     av_freep(&pic->slice_buffers);
 230
 231     return 0;
 232 }
 233
 234 static const struct {
 235     enum AVCodecID codec_id;
 236     int codec_profile;
 237     VAProfile va_profile;
 238 } vaapi_profile_map[] = {
 239 #define MAP(c, p, v) { AV_CODEC_ID_ ## c, FF_PROFILE_ ## p, VAProfile ## v }
 240     MAP(MPEG2VIDEO,  MPEG2_SIMPLE,    MPEG2Simple ),
 241     MAP(MPEG2VIDEO,  MPEG2_MAIN,      MPEG2Main   ),
 242     MAP(H263,        UNKNOWN,         H263Baseline),
 243     MAP(MPEG4,       MPEG4_SIMPLE,    MPEG4Simple ),
 244     MAP(MPEG4,       MPEG4_ADVANCED_SIMPLE,
 245                                MPEG4AdvancedSimple),
 246     MAP(MPEG4,       MPEG4_MAIN,      MPEG4Main   ),
 247     MAP(H264,        H264_CONSTRAINED_BASELINE,
 248                            H264ConstrainedBaseline),
 249     MAP(H264,        H264_BASELINE,   H264Baseline),
 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 static int vaapi_decode_make_config(AVCodecContext *avctx)
 274 {
 275     VAAPIDecodeContext *ctx = avctx->internal->hwaccel_priv_data;
 276
 277     AVVAAPIHWConfig       *hwconfig    = NULL;
 278     AVHWFramesConstraints *constraints = NULL;
 279     VAStatus vas;
 280     int err, i, j;
 281     const AVCodecDescriptor *codec_desc;
 282     VAProfile profile, *profile_list = NULL;
 283     int profile_count, exact_match, alt_profile;
 284     const AVPixFmtDescriptor *sw_desc, *desc;
 285
 286     // Allowing a profile mismatch can be useful because streams may
 287     // over-declare their required capabilities - in particular, many
 288     // H.264 baseline profile streams (notably some of those in FATE)
 289     // only use the feature set of constrained baseline.  This flag
 290     // would have to be be set by some external means in order to
 291     // actually be useful.  (AV_HWACCEL_FLAG_IGNORE_PROFILE?)
 292     int allow_profile_mismatch = 0;
 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(ctx->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(ctx->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 (allow_profile_mismatch) {
 350             av_log(avctx, AV_LOG_VERBOSE, "Codec %s profile %d not "
 351                    "supported for hardware decode.\n",
 352                    codec_desc->name, avctx->profile);
 353             av_log(avctx, AV_LOG_WARNING, "Using possibly-"
 354                    "incompatible profile %d instead.\n",
 355                    alt_profile);
 356         } else {
 357             av_log(avctx, AV_LOG_VERBOSE, "Codec %s profile %d not "
 358                    "supported for hardware decode.\n",
 359                    codec_desc->name, avctx->profile);
 360             err = AVERROR(EINVAL);
 361             goto fail;
 362         }
 363     }
 364
 365     ctx->va_profile    = profile;
 366     ctx->va_entrypoint = VAEntrypointVLD;
 367
 368     vas = vaCreateConfig(ctx->hwctx->display, ctx->va_profile,
 369                          ctx->va_entrypoint, NULL, 0,
 370                          &ctx->va_config);
 371     if (vas != VA_STATUS_SUCCESS) {
 372         av_log(avctx, AV_LOG_ERROR, "Failed to create decode "
 373                "configuration: %d (%s).\n", vas, vaErrorStr(vas));
 374         err = AVERROR(EIO);
 375         goto fail;
 376     }
 377
 378     hwconfig = av_hwdevice_hwconfig_alloc(avctx->hw_device_ctx ?
 379                                           avctx->hw_device_ctx :
 380                                           ctx->frames->device_ref);
 381     if (!hwconfig) {
 382         err = AVERROR(ENOMEM);
 383         goto fail;
 384     }
 385     hwconfig->config_id = ctx->va_config;
 386
 387     constraints =
 388         av_hwdevice_get_hwframe_constraints(avctx->hw_device_ctx ?
 389                                             avctx->hw_device_ctx :
 390                                             ctx->frames->device_ref,
 391                                             hwconfig);
 392     if (!constraints) {
 393         err = AVERROR(ENOMEM);
 394         goto fail;
 395     }
 396
 397     if (avctx->coded_width  < constraints->min_width  ||
 398         avctx->coded_height < constraints->min_height ||
 399         avctx->coded_width  > constraints->max_width  ||
 400         avctx->coded_height > constraints->max_height) {
 401         av_log(avctx, AV_LOG_ERROR, "Hardware does not support image "
 402                "size %dx%d (constraints: width %d-%d height %d-%d).\n",
 403                avctx->coded_width, avctx->coded_height,
 404                constraints->min_width,  constraints->max_width,
 405                constraints->min_height, constraints->max_height);
 406         err = AVERROR(EINVAL);
 407         goto fail;
 408     }
 409     if (!constraints->valid_sw_formats ||
 410         constraints->valid_sw_formats[0] == AV_PIX_FMT_NONE) {
 411         av_log(avctx, AV_LOG_ERROR, "Hardware does not offer any "
 412                "usable surface formats.\n");
 413         err = AVERROR(EINVAL);
 414         goto fail;
 415     }
 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     ctx->surface_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         ctx->surface_format = constraints->valid_sw_formats[i];
 436         break;
 437     }
 438
 439     // Start with at least four surfaces.
 440     ctx->surface_count = 4;
 441     // Add per-codec number of surfaces used for storing reference frames.
 442     switch (avctx->codec_id) {
 443     case AV_CODEC_ID_H264:
 444     case AV_CODEC_ID_HEVC:
 445         ctx->surface_count += 16;
 446         break;
 447     case AV_CODEC_ID_VP9:
 448         ctx->surface_count += 8;
 449         break;
 450     case AV_CODEC_ID_VP8:
 451         ctx->surface_count += 3;
 452         break;
 453     default:
 454         ctx->surface_count += 2;
 455     }
 456     // Add an additional surface per thread is frame threading is enabled.
 457     if (avctx->active_thread_type & FF_THREAD_FRAME)
 458         ctx->surface_count += avctx->thread_count;
 459
 460     av_hwframe_constraints_free(&constraints);
 461     av_freep(&hwconfig);
 462
 463     return 0;
 464
 465 fail:
 466     av_hwframe_constraints_free(&constraints);
 467     av_freep(&hwconfig);
 468     if (ctx->va_config != VA_INVALID_ID) {
 469         vaDestroyConfig(ctx->hwctx->display, ctx->va_config);
 470         ctx->va_config = VA_INVALID_ID;
 471     }
 472     av_freep(&profile_list);
 473     return err;
 474 }
 475
 476 int ff_vaapi_decode_init(AVCodecContext *avctx)
 477 {
 478     VAAPIDecodeContext *ctx = avctx->internal->hwaccel_priv_data;
 479     VAStatus vas;
 480     int err;
 481
 482     ctx->va_config  = VA_INVALID_ID;
 483     ctx->va_context = VA_INVALID_ID;
 484
 485 #if FF_API_VAAPI_CONTEXT
 486     if (avctx->hwaccel_context) {
 487         av_log(avctx, AV_LOG_WARNING, "Using deprecated struct "
 488                "vaapi_context in decode.\n");
 489
 490         ctx->have_old_context = 1;
 491         ctx->old_context = avctx->hwaccel_context;
 492
 493         // Really we only want the VAAPI device context, but this
 494         // allocates a whole generic device context because we don't
 495         // have any other way to determine how big it should be.
 496         ctx->device_ref =
 497             av_hwdevice_ctx_alloc(AV_HWDEVICE_TYPE_VAAPI);
 498         if (!ctx->device_ref) {
 499             err = AVERROR(ENOMEM);
 500             goto fail;
 501         }
 502         ctx->device = (AVHWDeviceContext*)ctx->device_ref->data;
 503         ctx->hwctx  = ctx->device->hwctx;
 504
 505         ctx->hwctx->display = ctx->old_context->display;
 506
 507         // The old VAAPI decode setup assumed this quirk was always
 508         // present, so set it here to avoid the behaviour changing.
 509         ctx->hwctx->driver_quirks =
 510             AV_VAAPI_DRIVER_QUIRK_RENDER_PARAM_BUFFERS;
 511
 512     } else
 513 #endif
 514     if (avctx->hw_frames_ctx) {
 515         // This structure has a shorter lifetime than the enclosing
 516         // AVCodecContext, so we inherit the references from there
 517         // and do not need to make separate ones.
 518
 519         ctx->frames = (AVHWFramesContext*)avctx->hw_frames_ctx->data;
 520         ctx->hwfc   = ctx->frames->hwctx;
 521         ctx->device = ctx->frames->device_ctx;
 522         ctx->hwctx  = ctx->device->hwctx;
 523
 524     } else if (avctx->hw_device_ctx) {
 525         ctx->device = (AVHWDeviceContext*)avctx->hw_device_ctx->data;
 526         ctx->hwctx  = ctx->device->hwctx;
 527
 528         if (ctx->device->type != AV_HWDEVICE_TYPE_VAAPI) {
 529             av_log(avctx, AV_LOG_ERROR, "Device supplied for VAAPI "
 530                    "decoding must be a VAAPI device (not %d).\n",
 531                    ctx->device->type);
 532             err = AVERROR(EINVAL);
 533             goto fail;
 534         }
 535
 536     } else {
 537         av_log(avctx, AV_LOG_ERROR, "A hardware device or frames context "
 538                "is required for VAAPI decoding.\n");
 539         err = AVERROR(EINVAL);
 540         goto fail;
 541     }
 542
 543 #if FF_API_VAAPI_CONTEXT
 544     if (ctx->have_old_context) {
 545         ctx->va_config  = ctx->old_context->config_id;
 546         ctx->va_context = ctx->old_context->context_id;
 547
 548         av_log(avctx, AV_LOG_DEBUG, "Using user-supplied decoder "
 549                "context: %#x/%#x.\n", ctx->va_config, ctx->va_context);
 550     } else {
 551 #endif
 552
 553     err = vaapi_decode_make_config(avctx);
 554     if (err)
 555         goto fail;
 556
 557     if (!avctx->hw_frames_ctx) {
 558         avctx->hw_frames_ctx = av_hwframe_ctx_alloc(avctx->hw_device_ctx);
 559         if (!avctx->hw_frames_ctx) {
 560             err = AVERROR(ENOMEM);
 561             goto fail;
 562         }
 563         ctx->frames = (AVHWFramesContext*)avctx->hw_frames_ctx->data;
 564
 565         ctx->frames->format = AV_PIX_FMT_VAAPI;
 566         ctx->frames->width  = avctx->coded_width;
 567         ctx->frames->height = avctx->coded_height;
 568
 569         ctx->frames->sw_format         = ctx->surface_format;
 570         ctx->frames->initial_pool_size = ctx->surface_count;
 571
 572         err = av_hwframe_ctx_init(avctx->hw_frames_ctx);
 573         if (err < 0) {
 574             av_log(avctx, AV_LOG_ERROR, "Failed to initialise internal "
 575                    "frames context: %d.\n", err);
 576             goto fail;
 577         }
 578
 579         ctx->hwfc = ctx->frames->hwctx;
 580     }
 581
 582     vas = vaCreateContext(ctx->hwctx->display, ctx->va_config,
 583                           avctx->coded_width, avctx->coded_height,
 584                           VA_PROGRESSIVE,
 585                           ctx->hwfc->surface_ids,
 586                           ctx->hwfc->nb_surfaces,
 587                           &ctx->va_context);
 588     if (vas != VA_STATUS_SUCCESS) {
 589         av_log(avctx, AV_LOG_ERROR, "Failed to create decode "
 590                "context: %d (%s).\n", vas, vaErrorStr(vas));
 591         err = AVERROR(EIO);
 592         goto fail;
 593     }
 594
 595     av_log(avctx, AV_LOG_DEBUG, "Decode context initialised: "
 596            "%#x/%#x.\n", ctx->va_config, ctx->va_context);
 597 #if FF_API_VAAPI_CONTEXT
 598     }
 599 #endif
 600
 601     return 0;
 602
 603 fail:
 604     ff_vaapi_decode_uninit(avctx);
 605     return err;
 606 }
 607
 608 int ff_vaapi_decode_uninit(AVCodecContext *avctx)
 609 {
 610     VAAPIDecodeContext *ctx = avctx->internal->hwaccel_priv_data;
 611     VAStatus vas;
 612
 613 #if FF_API_VAAPI_CONTEXT
 614     if (ctx->have_old_context) {
 615         av_buffer_unref(&ctx->device_ref);
 616     } else {
 617 #endif
 618
 619     if (ctx->va_context != VA_INVALID_ID) {
 620         vas = vaDestroyContext(ctx->hwctx->display, ctx->va_context);
 621         if (vas != VA_STATUS_SUCCESS) {
 622             av_log(avctx, AV_LOG_ERROR, "Failed to destroy decode "
 623                    "context %#x: %d (%s).\n",
 624                    ctx->va_context, vas, vaErrorStr(vas));
 625         }
 626     }
 627     if (ctx->va_config != VA_INVALID_ID) {
 628         vas = vaDestroyConfig(ctx->hwctx->display, ctx->va_config);
 629         if (vas != VA_STATUS_SUCCESS) {
 630             av_log(avctx, AV_LOG_ERROR, "Failed to destroy decode "
 631                    "configuration %#x: %d (%s).\n",
 632                    ctx->va_config, vas, vaErrorStr(vas));
 633         }
 634     }
 635
 636 #if FF_API_VAAPI_CONTEXT
 637     }
 638 #endif
 639
 640     return 0;
 641 }