libavcodec/qsv.c

   1 /*
   2  * Intel MediaSDK QSV encoder/decoder shared code
   3  *
   4  * This file is part of Libav.
   5  *
   6  * Libav is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * Libav is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with Libav; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include <mfx/mfxvideo.h>
  22 #include <mfx/mfxplugin.h>
  23
  24 #include <stdio.h>
  25 #include <string.h>
  26
  27 #include "libavutil/avstring.h"
  28 #include "libavutil/common.h"
  29 #include "libavutil/error.h"
  30 #include "libavutil/hwcontext.h"
  31 #include "libavutil/hwcontext_qsv.h"
  32 #include "libavutil/imgutils.h"
  33
  34 #include "avcodec.h"
  35 #include "qsv_internal.h"
  36
  37 #if QSV_VERSION_ATLEAST(1, 12)
  38 #include "mfx/mfxvp8.h"
  39 #endif
  40
  41 int ff_qsv_codec_id_to_mfx(enum AVCodecID codec_id)
  42 {
  43     switch (codec_id) {
  44     case AV_CODEC_ID_H264:
  45         return MFX_CODEC_AVC;
  46 #if QSV_VERSION_ATLEAST(1, 8)
  47     case AV_CODEC_ID_HEVC:
  48         return MFX_CODEC_HEVC;
  49 #endif
  50     case AV_CODEC_ID_MPEG1VIDEO:
  51     case AV_CODEC_ID_MPEG2VIDEO:
  52         return MFX_CODEC_MPEG2;
  53     case AV_CODEC_ID_VC1:
  54         return MFX_CODEC_VC1;
  55 #if QSV_VERSION_ATLEAST(1, 12)
  56     case AV_CODEC_ID_VP8:
  57         return MFX_CODEC_VP8;
  58 #endif
  59     default:
  60         break;
  61     }
  62
  63     return AVERROR(ENOSYS);
  64 }
  65
  66 int ff_qsv_profile_to_mfx(enum AVCodecID codec_id, int profile)
  67 {
  68     if (profile == FF_PROFILE_UNKNOWN)
  69         return MFX_PROFILE_UNKNOWN;
  70     switch (codec_id) {
  71     case AV_CODEC_ID_H264:
  72     case AV_CODEC_ID_HEVC:
  73         return profile;
  74     case AV_CODEC_ID_VC1:
  75         return 4 * profile + 1;
  76     case AV_CODEC_ID_MPEG2VIDEO:
  77         return 0x10 * profile;
  78     }
  79     return MFX_PROFILE_UNKNOWN;
  80 }
  81
  82 static const struct {
  83     mfxStatus   mfxerr;
  84     int         averr;
  85     const char *desc;
  86 } qsv_errors[] = {
  87     { MFX_ERR_NONE,                     0,               "success"                              },
  88     { MFX_ERR_UNKNOWN,                  AVERROR_UNKNOWN, "unknown error"                        },
  89     { MFX_ERR_NULL_PTR,                 AVERROR(EINVAL), "NULL pointer"                         },
  90     { MFX_ERR_UNSUPPORTED,              AVERROR(ENOSYS), "unsupported"                          },
  91     { MFX_ERR_MEMORY_ALLOC,             AVERROR(ENOMEM), "failed to allocate memory"            },
  92     { MFX_ERR_NOT_ENOUGH_BUFFER,        AVERROR(ENOMEM), "insufficient input/output buffer"     },
  93     { MFX_ERR_INVALID_HANDLE,           AVERROR(EINVAL), "invalid handle"                       },
  94     { MFX_ERR_LOCK_MEMORY,              AVERROR(EIO),    "failed to lock the memory block"      },
  95     { MFX_ERR_NOT_INITIALIZED,          AVERROR_BUG,     "not initialized"                      },
  96     { MFX_ERR_NOT_FOUND,                AVERROR(ENOSYS), "specified object was not found"       },
  97     { MFX_ERR_MORE_DATA,                AVERROR(EAGAIN), "expect more data at input"            },
  98     { MFX_ERR_MORE_SURFACE,             AVERROR(EAGAIN), "expect more surface at output"        },
  99     { MFX_ERR_ABORTED,                  AVERROR_UNKNOWN, "operation aborted"                    },
 100     { MFX_ERR_DEVICE_LOST,              AVERROR(EIO),    "device lost"                          },
 101     { MFX_ERR_INCOMPATIBLE_VIDEO_PARAM, AVERROR(EINVAL), "incompatible video parameters"        },
 102     { MFX_ERR_INVALID_VIDEO_PARAM,      AVERROR(EINVAL), "invalid video parameters"             },
 103     { MFX_ERR_UNDEFINED_BEHAVIOR,       AVERROR_BUG,     "undefined behavior"                   },
 104     { MFX_ERR_DEVICE_FAILED,            AVERROR(EIO),    "device failed"                        },
 105     { MFX_ERR_MORE_BITSTREAM,           AVERROR(EAGAIN), "expect more bitstream at output"      },
 106     { MFX_ERR_INCOMPATIBLE_AUDIO_PARAM, AVERROR(EINVAL), "incompatible audio parameters"        },
 107     { MFX_ERR_INVALID_AUDIO_PARAM,      AVERROR(EINVAL), "invalid audio parameters"             },
 108
 109     { MFX_WRN_IN_EXECUTION,             0,               "operation in execution"               },
 110     { MFX_WRN_DEVICE_BUSY,              0,               "device busy"                          },
 111     { MFX_WRN_VIDEO_PARAM_CHANGED,      0,               "video parameters changed"             },
 112     { MFX_WRN_PARTIAL_ACCELERATION,     0,               "partial acceleration"                 },
 113     { MFX_WRN_INCOMPATIBLE_VIDEO_PARAM, 0,               "incompatible video parameters"        },
 114     { MFX_WRN_VALUE_NOT_CHANGED,        0,               "value is saturated"                   },
 115     { MFX_WRN_OUT_OF_RANGE,             0,               "value out of range"                   },
 116     { MFX_WRN_FILTER_SKIPPED,           0,               "filter skipped"                       },
 117     { MFX_WRN_INCOMPATIBLE_AUDIO_PARAM, 0,               "incompatible audio parameters"        },
 118 };
 119
 120 int ff_qsv_map_error(mfxStatus mfx_err, const char **desc)
 121 {
 122     int i;
 123     for (i = 0; i < FF_ARRAY_ELEMS(qsv_errors); i++) {
 124         if (qsv_errors[i].mfxerr == mfx_err) {
 125             if (desc)
 126                 *desc = qsv_errors[i].desc;
 127             return qsv_errors[i].averr;
 128         }
 129     }
 130     if (desc)
 131         *desc = "unknown error";
 132     return AVERROR_UNKNOWN;
 133 }
 134
 135 int ff_qsv_print_error(void *log_ctx, mfxStatus err,
 136                        const char *error_string)
 137 {
 138     const char *desc;
 139     int ret;
 140     ret = ff_qsv_map_error(err, &desc);
 141     av_log(log_ctx, AV_LOG_ERROR, "%s: %s (%d)\n", error_string, desc, err);
 142     return ret;
 143 }
 144
 145 int ff_qsv_print_warning(void *log_ctx, mfxStatus err,
 146                          const char *warning_string)
 147 {
 148     const char *desc;
 149     int ret;
 150     ret = ff_qsv_map_error(err, &desc);
 151     av_log(log_ctx, AV_LOG_WARNING, "%s: %s (%d)\n", warning_string, desc, err);
 152     return ret;
 153 }
 154
 155 static enum AVPixelFormat qsv_map_fourcc(uint32_t fourcc)
 156 {
 157     switch (fourcc) {
 158     case MFX_FOURCC_NV12: return AV_PIX_FMT_NV12;
 159     case MFX_FOURCC_P010: return AV_PIX_FMT_P010;
 160     case MFX_FOURCC_P8:   return AV_PIX_FMT_PAL8;
 161     }
 162     return AV_PIX_FMT_NONE;
 163 }
 164
 165 int ff_qsv_map_pixfmt(enum AVPixelFormat format, uint32_t *fourcc)
 166 {
 167     switch (format) {
 168     case AV_PIX_FMT_YUV420P:
 169     case AV_PIX_FMT_YUVJ420P:
 170     case AV_PIX_FMT_NV12:
 171         *fourcc = MFX_FOURCC_NV12;
 172         return AV_PIX_FMT_NV12;
 173     case AV_PIX_FMT_YUV420P10:
 174     case AV_PIX_FMT_P010:
 175         *fourcc = MFX_FOURCC_P010;
 176         return AV_PIX_FMT_P010;
 177     default:
 178         return AVERROR(ENOSYS);
 179     }
 180 }
 181
 182 int ff_qsv_find_surface_idx(QSVFramesContext *ctx, QSVFrame *frame)
 183 {
 184     int i;
 185     for (i = 0; i < ctx->nb_mids; i++) {
 186         QSVMid *mid = &ctx->mids[i];
 187         if (mid->handle == frame->surface.Data.MemId)
 188             return i;
 189     }
 190     return AVERROR_BUG;
 191 }
 192
 193 static int qsv_load_plugins(mfxSession session, const char *load_plugins,
 194                             void *logctx)
 195 {
 196     if (!load_plugins || !*load_plugins)
 197         return 0;
 198
 199     while (*load_plugins) {
 200         mfxPluginUID uid;
 201         mfxStatus ret;
 202         int i, err = 0;
 203
 204         char *plugin = av_get_token(&load_plugins, ":");
 205         if (!plugin)
 206             return AVERROR(ENOMEM);
 207         if (strlen(plugin) != 2 * sizeof(uid.Data)) {
 208             av_log(logctx, AV_LOG_ERROR, "Invalid plugin UID length\n");
 209             err = AVERROR(EINVAL);
 210             goto load_plugin_fail;
 211         }
 212
 213         for (i = 0; i < sizeof(uid.Data); i++) {
 214             err = sscanf(plugin + 2 * i, "%2hhx", uid.Data + i);
 215             if (err != 1) {
 216                 av_log(logctx, AV_LOG_ERROR, "Invalid plugin UID\n");
 217                 err = AVERROR(EINVAL);
 218                 goto load_plugin_fail;
 219             }
 220
 221         }
 222
 223         ret = MFXVideoUSER_Load(session, &uid, 1);
 224         if (ret < 0) {
 225             char errorbuf[128];
 226             snprintf(errorbuf, sizeof(errorbuf),
 227                      "Could not load the requested plugin '%s'", plugin);
 228             err = ff_qsv_print_error(logctx, ret, errorbuf);
 229             goto load_plugin_fail;
 230         }
 231
 232         if (*load_plugins)
 233             load_plugins++;
 234 load_plugin_fail:
 235         av_freep(&plugin);
 236         if (err < 0)
 237             return err;
 238     }
 239
 240     return 0;
 241
 242 }
 243
 244 int ff_qsv_init_internal_session(AVCodecContext *avctx, mfxSession *session,
 245                                  const char *load_plugins)
 246 {
 247     mfxIMPL impl   = MFX_IMPL_AUTO_ANY;
 248     mfxVersion ver = { { QSV_VERSION_MINOR, QSV_VERSION_MAJOR } };
 249
 250     const char *desc;
 251     int ret;
 252
 253     ret = MFXInit(impl, &ver, session);
 254     if (ret < 0)
 255         return ff_qsv_print_error(avctx, ret,
 256                                   "Error initializing an internal MFX session");
 257
 258     ret = qsv_load_plugins(*session, load_plugins, avctx);
 259     if (ret < 0) {
 260         av_log(avctx, AV_LOG_ERROR, "Error loading plugins\n");
 261         return ret;
 262     }
 263
 264     MFXQueryIMPL(*session, &impl);
 265
 266     switch (MFX_IMPL_BASETYPE(impl)) {
 267     case MFX_IMPL_SOFTWARE:
 268         desc = "software";
 269         break;
 270     case MFX_IMPL_HARDWARE:
 271     case MFX_IMPL_HARDWARE2:
 272     case MFX_IMPL_HARDWARE3:
 273     case MFX_IMPL_HARDWARE4:
 274         desc = "hardware accelerated";
 275         break;
 276     default:
 277         desc = "unknown";
 278     }
 279
 280     av_log(avctx, AV_LOG_VERBOSE,
 281            "Initialized an internal MFX session using %s implementation\n",
 282            desc);
 283
 284     return 0;
 285 }
 286
 287 static void mids_buf_free(void *opaque, uint8_t *data)
 288 {
 289     AVBufferRef *hw_frames_ref = opaque;
 290     av_buffer_unref(&hw_frames_ref);
 291     av_freep(&data);
 292 }
 293
 294 static AVBufferRef *qsv_create_mids(AVBufferRef *hw_frames_ref)
 295 {
 296     AVHWFramesContext    *frames_ctx = (AVHWFramesContext*)hw_frames_ref->data;
 297     AVQSVFramesContext *frames_hwctx = frames_ctx->hwctx;
 298     int                  nb_surfaces = frames_hwctx->nb_surfaces;
 299
 300     AVBufferRef *mids_buf, *hw_frames_ref1;
 301     QSVMid *mids;
 302     int i;
 303
 304     hw_frames_ref1 = av_buffer_ref(hw_frames_ref);
 305     if (!hw_frames_ref1)
 306         return NULL;
 307
 308     mids = av_mallocz_array(nb_surfaces, sizeof(*mids));
 309     if (!mids) {
 310         av_buffer_unref(&hw_frames_ref1);
 311         return NULL;
 312     }
 313
 314     mids_buf = av_buffer_create((uint8_t*)mids, nb_surfaces * sizeof(*mids),
 315                                 mids_buf_free, hw_frames_ref1, 0);
 316     if (!mids_buf) {
 317         av_buffer_unref(&hw_frames_ref1);
 318         av_freep(&mids);
 319         return NULL;
 320     }
 321
 322     for (i = 0; i < nb_surfaces; i++) {
 323         QSVMid *mid = &mids[i];
 324         mid->handle        = frames_hwctx->surfaces[i].Data.MemId;
 325         mid->hw_frames_ref = hw_frames_ref1;
 326     }
 327
 328     return mids_buf;
 329 }
 330
 331 static int qsv_setup_mids(mfxFrameAllocResponse *resp, AVBufferRef *hw_frames_ref,
 332                           AVBufferRef *mids_buf)
 333 {
 334     AVHWFramesContext    *frames_ctx = (AVHWFramesContext*)hw_frames_ref->data;
 335     AVQSVFramesContext *frames_hwctx = frames_ctx->hwctx;
 336     QSVMid                     *mids = (QSVMid*)mids_buf->data;
 337     int                  nb_surfaces = frames_hwctx->nb_surfaces;
 338     int i;
 339
 340     // the allocated size of the array is two larger than the number of
 341     // surfaces, we store the references to the frames context and the
 342     // QSVMid array there
 343     resp->mids = av_mallocz_array(nb_surfaces + 2, sizeof(*resp->mids));
 344     if (!resp->mids)
 345         return AVERROR(ENOMEM);
 346
 347     for (i = 0; i < nb_surfaces; i++)
 348         resp->mids[i] = &mids[i];
 349     resp->NumFrameActual = nb_surfaces;
 350
 351     resp->mids[resp->NumFrameActual] = (mfxMemId)av_buffer_ref(hw_frames_ref);
 352     if (!resp->mids[resp->NumFrameActual]) {
 353         av_freep(&resp->mids);
 354         return AVERROR(ENOMEM);
 355     }
 356
 357     resp->mids[resp->NumFrameActual + 1] = av_buffer_ref(mids_buf);
 358     if (!resp->mids[resp->NumFrameActual + 1]) {
 359         av_buffer_unref((AVBufferRef**)&resp->mids[resp->NumFrameActual]);
 360         av_freep(&resp->mids);
 361         return AVERROR(ENOMEM);
 362     }
 363
 364     return 0;
 365 }
 366
 367 static mfxStatus qsv_frame_alloc(mfxHDL pthis, mfxFrameAllocRequest *req,
 368                                  mfxFrameAllocResponse *resp)
 369 {
 370     QSVFramesContext *ctx = pthis;
 371     int ret;
 372
 373     /* this should only be called from an encoder or decoder and
 374      * only allocates video memory frames */
 375     if (!(req->Type & (MFX_MEMTYPE_VIDEO_MEMORY_DECODER_TARGET |
 376                        MFX_MEMTYPE_VIDEO_MEMORY_PROCESSOR_TARGET))         ||
 377         !(req->Type & (MFX_MEMTYPE_FROM_DECODE | MFX_MEMTYPE_FROM_ENCODE)))
 378         return MFX_ERR_UNSUPPORTED;
 379
 380     if (req->Type & MFX_MEMTYPE_EXTERNAL_FRAME) {
 381         /* external frames -- fill from the caller-supplied frames context */
 382         AVHWFramesContext *frames_ctx = (AVHWFramesContext*)ctx->hw_frames_ctx->data;
 383         AVQSVFramesContext *frames_hwctx = frames_ctx->hwctx;
 384         mfxFrameInfo      *i  = &req->Info;
 385         mfxFrameInfo      *i1 = &frames_hwctx->surfaces[0].Info;
 386
 387         if (i->Width  != i1->Width  || i->Height != i1->Height ||
 388             i->FourCC != i1->FourCC || i->ChromaFormat != i1->ChromaFormat) {
 389             av_log(ctx->logctx, AV_LOG_ERROR, "Mismatching surface properties in an "
 390                    "allocation request: %dx%d %d %d vs %dx%d %d %d\n",
 391                    i->Width,  i->Height,  i->FourCC,  i->ChromaFormat,
 392                    i1->Width, i1->Height, i1->FourCC, i1->ChromaFormat);
 393             return MFX_ERR_UNSUPPORTED;
 394         }
 395
 396         ret = qsv_setup_mids(resp, ctx->hw_frames_ctx, ctx->mids_buf);
 397         if (ret < 0) {
 398             av_log(ctx->logctx, AV_LOG_ERROR,
 399                    "Error filling an external frame allocation request\n");
 400             return MFX_ERR_MEMORY_ALLOC;
 401         }
 402     } else if (req->Type & MFX_MEMTYPE_INTERNAL_FRAME) {
 403         /* internal frames -- allocate a new hw frames context */
 404         AVHWFramesContext *ext_frames_ctx = (AVHWFramesContext*)ctx->hw_frames_ctx->data;
 405         mfxFrameInfo      *i  = &req->Info;
 406
 407         AVBufferRef *frames_ref, *mids_buf;
 408         AVHWFramesContext *frames_ctx;
 409         AVQSVFramesContext *frames_hwctx;
 410
 411         frames_ref = av_hwframe_ctx_alloc(ext_frames_ctx->device_ref);
 412         if (!frames_ref)
 413             return MFX_ERR_MEMORY_ALLOC;
 414
 415         frames_ctx   = (AVHWFramesContext*)frames_ref->data;
 416         frames_hwctx = frames_ctx->hwctx;
 417
 418         frames_ctx->format            = AV_PIX_FMT_QSV;
 419         frames_ctx->sw_format         = qsv_map_fourcc(i->FourCC);
 420         frames_ctx->width             = i->Width;
 421         frames_ctx->height            = i->Height;
 422         frames_ctx->initial_pool_size = req->NumFrameSuggested;
 423
 424         frames_hwctx->frame_type      = req->Type;
 425
 426         ret = av_hwframe_ctx_init(frames_ref);
 427         if (ret < 0) {
 428             av_log(ctx->logctx, AV_LOG_ERROR,
 429                    "Error initializing a frames context for an internal frame "
 430                    "allocation request\n");
 431             av_buffer_unref(&frames_ref);
 432             return MFX_ERR_MEMORY_ALLOC;
 433         }
 434
 435         mids_buf = qsv_create_mids(frames_ref);
 436         if (!mids_buf) {
 437             av_buffer_unref(&frames_ref);
 438             return MFX_ERR_MEMORY_ALLOC;
 439         }
 440
 441         ret = qsv_setup_mids(resp, frames_ref, mids_buf);
 442         av_buffer_unref(&mids_buf);
 443         av_buffer_unref(&frames_ref);
 444         if (ret < 0) {
 445             av_log(ctx->logctx, AV_LOG_ERROR,
 446                    "Error filling an internal frame allocation request\n");
 447             return MFX_ERR_MEMORY_ALLOC;
 448         }
 449     } else {
 450         return MFX_ERR_UNSUPPORTED;
 451     }
 452
 453     return MFX_ERR_NONE;
 454 }
 455
 456 static mfxStatus qsv_frame_free(mfxHDL pthis, mfxFrameAllocResponse *resp)
 457 {
 458     av_buffer_unref((AVBufferRef**)&resp->mids[resp->NumFrameActual]);
 459     av_buffer_unref((AVBufferRef**)&resp->mids[resp->NumFrameActual + 1]);
 460     av_freep(&resp->mids);
 461     return MFX_ERR_NONE;
 462 }
 463
 464 static mfxStatus qsv_frame_lock(mfxHDL pthis, mfxMemId mid, mfxFrameData *ptr)
 465 {
 466     QSVMid *qsv_mid = mid;
 467     AVHWFramesContext *hw_frames_ctx = (AVHWFramesContext*)qsv_mid->hw_frames_ref->data;
 468     AVQSVFramesContext *hw_frames_hwctx = hw_frames_ctx->hwctx;
 469     int size;
 470     int ret;
 471     mfxStatus err;
 472
 473     if (qsv_mid->locked_frame)
 474         return MFX_ERR_UNDEFINED_BEHAVIOR;
 475
 476     /* Allocate a system memory frame that will hold the mapped data. */
 477     qsv_mid->locked_frame = av_frame_alloc();
 478     if (!qsv_mid->locked_frame)
 479         return MFX_ERR_MEMORY_ALLOC;
 480     qsv_mid->locked_frame->format  = hw_frames_ctx->sw_format;
 481
 482     /* wrap the provided handle in a hwaccel AVFrame */
 483     qsv_mid->hw_frame = av_frame_alloc();
 484     if (!qsv_mid->hw_frame)
 485         goto fail;
 486
 487     qsv_mid->hw_frame->data[3] = (uint8_t*)&qsv_mid->surf;
 488     qsv_mid->hw_frame->format  = AV_PIX_FMT_QSV;
 489
 490     // doesn't really matter what buffer is used here
 491     qsv_mid->hw_frame->buf[0]  = av_buffer_alloc(1);
 492     if (!qsv_mid->hw_frame->buf[0])
 493         goto fail;
 494
 495     qsv_mid->hw_frame->width   = hw_frames_ctx->width;
 496     qsv_mid->hw_frame->height  = hw_frames_ctx->height;
 497
 498     qsv_mid->hw_frame->hw_frames_ctx = av_buffer_ref(qsv_mid->hw_frames_ref);
 499     if (!qsv_mid->hw_frame->hw_frames_ctx)
 500         goto fail;
 501
 502     qsv_mid->surf.Info = hw_frames_hwctx->surfaces[0].Info;
 503     qsv_mid->surf.Data.MemId = qsv_mid->handle;
 504
 505     /* map the data to the system memory */
 506     ret = av_hwframe_map(qsv_mid->locked_frame, qsv_mid->hw_frame,
 507                          AV_HWFRAME_MAP_DIRECT);
 508     if (ret < 0)
 509         goto fail;
 510
 511     ptr->Pitch = qsv_mid->locked_frame->linesize[0];
 512     ptr->Y     = qsv_mid->locked_frame->data[0];
 513     ptr->U     = qsv_mid->locked_frame->data[1];
 514     ptr->V     = qsv_mid->locked_frame->data[1] + 1;
 515
 516     return MFX_ERR_NONE;
 517 fail:
 518     av_frame_free(&qsv_mid->hw_frame);
 519     av_frame_free(&qsv_mid->locked_frame);
 520     return MFX_ERR_MEMORY_ALLOC;
 521 }
 522
 523 static mfxStatus qsv_frame_unlock(mfxHDL pthis, mfxMemId mid, mfxFrameData *ptr)
 524 {
 525     QSVMid *qsv_mid = mid;
 526     int ret;
 527
 528     av_frame_free(&qsv_mid->locked_frame);
 529     av_frame_free(&qsv_mid->hw_frame);
 530
 531     return MFX_ERR_NONE;
 532 }
 533
 534 static mfxStatus qsv_frame_get_hdl(mfxHDL pthis, mfxMemId mid, mfxHDL *hdl)
 535 {
 536     QSVMid *qsv_mid = (QSVMid*)mid;
 537     *hdl = qsv_mid->handle;
 538     return MFX_ERR_NONE;
 539 }
 540
 541 int ff_qsv_init_session_hwcontext(AVCodecContext *avctx, mfxSession *psession,
 542                                   QSVFramesContext *qsv_frames_ctx,
 543                                   const char *load_plugins, int opaque)
 544 {
 545     static const mfxHandleType handle_types[] = {
 546         MFX_HANDLE_VA_DISPLAY,
 547         MFX_HANDLE_D3D9_DEVICE_MANAGER,
 548         MFX_HANDLE_D3D11_DEVICE,
 549     };
 550     mfxFrameAllocator frame_allocator = {
 551         .pthis  = qsv_frames_ctx,
 552         .Alloc  = qsv_frame_alloc,
 553         .Lock   = qsv_frame_lock,
 554         .Unlock = qsv_frame_unlock,
 555         .GetHDL = qsv_frame_get_hdl,
 556         .Free   = qsv_frame_free,
 557     };
 558
 559     AVHWFramesContext    *frames_ctx = (AVHWFramesContext*)qsv_frames_ctx->hw_frames_ctx->data;
 560     AVQSVFramesContext *frames_hwctx = frames_ctx->hwctx;
 561     AVQSVDeviceContext *device_hwctx = frames_ctx->device_ctx->hwctx;
 562     mfxSession        parent_session = device_hwctx->session;
 563
 564     mfxSession    session;
 565     mfxVersion    ver;
 566     mfxIMPL       impl;
 567     mfxHDL        handle = NULL;
 568     mfxHandleType handle_type;
 569     mfxStatus err;
 570
 571     int i, ret;
 572
 573     err = MFXQueryIMPL(parent_session, &impl);
 574     if (err == MFX_ERR_NONE)
 575         err = MFXQueryVersion(parent_session, &ver);
 576     if (err != MFX_ERR_NONE)
 577         return ff_qsv_print_error(avctx, err,
 578                                   "Error querying the session attributes");
 579
 580     for (i = 0; i < FF_ARRAY_ELEMS(handle_types); i++) {
 581         err = MFXVideoCORE_GetHandle(parent_session, handle_types[i], &handle);
 582         if (err == MFX_ERR_NONE) {
 583             handle_type = handle_types[i];
 584             break;
 585         }
 586         handle = NULL;
 587     }
 588     if (!handle) {
 589         av_log(avctx, AV_LOG_VERBOSE, "No supported hw handle could be retrieved "
 590                "from the session\n");
 591     }
 592
 593     err = MFXInit(impl, &ver, &session);
 594     if (err != MFX_ERR_NONE)
 595         return ff_qsv_print_error(avctx, err,
 596                                   "Error initializing a child MFX session");
 597
 598     if (handle) {
 599         err = MFXVideoCORE_SetHandle(session, handle_type, handle);
 600         if (err != MFX_ERR_NONE)
 601             return ff_qsv_print_error(avctx, err,
 602                                       "Error setting a HW handle");
 603     }
 604
 605     ret = qsv_load_plugins(session, load_plugins, avctx);
 606     if (ret < 0) {
 607         av_log(avctx, AV_LOG_ERROR, "Error loading plugins\n");
 608         return ret;
 609     }
 610
 611     if (!opaque) {
 612         qsv_frames_ctx->logctx = avctx;
 613
 614         /* allocate the memory ids for the external frames */
 615         av_buffer_unref(&qsv_frames_ctx->mids_buf);
 616         qsv_frames_ctx->mids_buf = qsv_create_mids(qsv_frames_ctx->hw_frames_ctx);
 617         if (!qsv_frames_ctx->mids_buf)
 618             return AVERROR(ENOMEM);
 619         qsv_frames_ctx->mids    = (QSVMid*)qsv_frames_ctx->mids_buf->data;
 620         qsv_frames_ctx->nb_mids = frames_hwctx->nb_surfaces;
 621
 622         err = MFXVideoCORE_SetFrameAllocator(session, &frame_allocator);
 623         if (err != MFX_ERR_NONE)
 624             return ff_qsv_print_error(avctx, err,
 625                                       "Error setting a frame allocator");
 626     }
 627
 628     *psession = session;
 629     return 0;
 630 }