libavcodec/vaapi_encode.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 <inttypes.h>
  20 #include <string.h>
  21
  22 #include "libavutil/avassert.h"
  23 #include "libavutil/common.h"
  24 #include "libavutil/log.h"
  25 #include "libavutil/pixdesc.h"
  26
  27 #include "vaapi_encode.h"
  28 #include "avcodec.h"
  29
  30 static const char *picture_type_name[] = { "IDR", "I", "P", "B" };
  31
  32 static int vaapi_encode_make_packed_header(AVCodecContext *avctx,
  33                                            VAAPIEncodePicture *pic,
  34                                            int type, char *data, size_t bit_len)
  35 {
  36     VAAPIEncodeContext *ctx = avctx->priv_data;
  37     VAStatus vas;
  38     VABufferID param_buffer, data_buffer;
  39     VAEncPackedHeaderParameterBuffer params = {
  40         .type = type,
  41         .bit_length = bit_len,
  42         .has_emulation_bytes = 1,
  43     };
  44
  45     av_assert0(pic->nb_param_buffers + 2 <= MAX_PARAM_BUFFERS);
  46
  47     vas = vaCreateBuffer(ctx->hwctx->display, ctx->va_context,
  48                          VAEncPackedHeaderParameterBufferType,
  49                          sizeof(params), 1, &params, &param_buffer);
  50     if (vas != VA_STATUS_SUCCESS) {
  51         av_log(avctx, AV_LOG_ERROR, "Failed to create parameter buffer "
  52                "for packed header (type %d): %d (%s).\n",
  53                type, vas, vaErrorStr(vas));
  54         return AVERROR(EIO);
  55     }
  56     pic->param_buffers[pic->nb_param_buffers++] = param_buffer;
  57
  58     vas = vaCreateBuffer(ctx->hwctx->display, ctx->va_context,
  59                          VAEncPackedHeaderDataBufferType,
  60                          (bit_len + 7) / 8, 1, data, &data_buffer);
  61     if (vas != VA_STATUS_SUCCESS) {
  62         av_log(avctx, AV_LOG_ERROR, "Failed to create data buffer "
  63                "for packed header (type %d): %d (%s).\n",
  64                type, vas, vaErrorStr(vas));
  65         return AVERROR(EIO);
  66     }
  67     pic->param_buffers[pic->nb_param_buffers++] = data_buffer;
  68
  69     av_log(avctx, AV_LOG_DEBUG, "Packed header buffer (%d) is %#x/%#x "
  70            "(%zu bits).\n", type, param_buffer, data_buffer, bit_len);
  71     return 0;
  72 }
  73
  74 static int vaapi_encode_make_param_buffer(AVCodecContext *avctx,
  75                                           VAAPIEncodePicture *pic,
  76                                           int type, char *data, size_t len)
  77 {
  78     VAAPIEncodeContext *ctx = avctx->priv_data;
  79     VAStatus vas;
  80     VABufferID buffer;
  81
  82     av_assert0(pic->nb_param_buffers + 1 <= MAX_PARAM_BUFFERS);
  83
  84     vas = vaCreateBuffer(ctx->hwctx->display, ctx->va_context,
  85                          type, len, 1, data, &buffer);
  86     if (vas != VA_STATUS_SUCCESS) {
  87         av_log(avctx, AV_LOG_ERROR, "Failed to create parameter buffer "
  88                "(type %d): %d (%s).\n", type, vas, vaErrorStr(vas));
  89         return AVERROR(EIO);
  90     }
  91     pic->param_buffers[pic->nb_param_buffers++] = buffer;
  92
  93     av_log(avctx, AV_LOG_DEBUG, "Param buffer (%d) is %#x.\n",
  94            type, buffer);
  95     return 0;
  96 }
  97
  98 static int vaapi_encode_wait(AVCodecContext *avctx,
  99                              VAAPIEncodePicture *pic)
 100 {
 101     VAAPIEncodeContext *ctx = avctx->priv_data;
 102     VAStatus vas;
 103
 104     av_assert0(pic->encode_issued);
 105
 106     if (pic->encode_complete) {
 107         // Already waited for this picture.
 108         return 0;
 109     }
 110
 111     av_log(avctx, AV_LOG_DEBUG, "Sync to pic %"PRId64"/%"PRId64" "
 112            "(recon surface %#x).\n", pic->display_order,
 113            pic->encode_order, pic->recon_surface);
 114
 115     vas = vaSyncSurface(ctx->hwctx->display, pic->recon_surface);
 116     if (vas != VA_STATUS_SUCCESS) {
 117         av_log(avctx, AV_LOG_ERROR, "Failed to sync to picture completion: "
 118                "%d (%s).\n", vas, vaErrorStr(vas));
 119         return AVERROR(EIO);
 120     }
 121
 122     // Input is definitely finished with now.
 123     av_frame_free(&pic->input_image);
 124
 125     pic->encode_complete = 1;
 126     return 0;
 127 }
 128
 129 static int vaapi_encode_issue(AVCodecContext *avctx,
 130                               VAAPIEncodePicture *pic)
 131 {
 132     VAAPIEncodeContext *ctx = avctx->priv_data;
 133     VAAPIEncodeSlice *slice;
 134     VAStatus vas;
 135     int err, i;
 136     char data[MAX_PARAM_BUFFER_SIZE];
 137     size_t bit_len;
 138
 139     av_log(avctx, AV_LOG_DEBUG, "Issuing encode for pic %"PRId64"/%"PRId64" "
 140            "as type %s.\n", pic->display_order, pic->encode_order,
 141            picture_type_name[pic->type]);
 142     if (pic->nb_refs == 0) {
 143         av_log(avctx, AV_LOG_DEBUG, "No reference pictures.\n");
 144     } else {
 145         av_log(avctx, AV_LOG_DEBUG, "Refers to:");
 146         for (i = 0; i < pic->nb_refs; i++) {
 147             av_log(avctx, AV_LOG_DEBUG, " %"PRId64"/%"PRId64,
 148                    pic->refs[i]->display_order, pic->refs[i]->encode_order);
 149         }
 150         av_log(avctx, AV_LOG_DEBUG, ".\n");
 151     }
 152
 153     av_assert0(pic->input_available && !pic->encode_issued);
 154     for (i = 0; i < pic->nb_refs; i++) {
 155         av_assert0(pic->refs[i]);
 156         // If we are serialised then the references must have already
 157         // completed.  If not, they must have been issued but need not
 158         // have completed yet.
 159         if (ctx->issue_mode == ISSUE_MODE_SERIALISE_EVERYTHING)
 160             av_assert0(pic->refs[i]->encode_complete);
 161         else
 162             av_assert0(pic->refs[i]->encode_issued);
 163     }
 164
 165     av_log(avctx, AV_LOG_DEBUG, "Input surface is %#x.\n", pic->input_surface);
 166
 167     pic->recon_image = av_frame_alloc();
 168     if (!pic->recon_image) {
 169         err = AVERROR(ENOMEM);
 170         goto fail;
 171     }
 172
 173     err = av_hwframe_get_buffer(ctx->recon_frames_ref, pic->recon_image, 0);
 174     if (err < 0) {
 175         err = AVERROR(ENOMEM);
 176         goto fail;
 177     }
 178     pic->recon_surface = (VASurfaceID)(uintptr_t)pic->recon_image->data[3];
 179     av_log(avctx, AV_LOG_DEBUG, "Recon surface is %#x.\n", pic->recon_surface);
 180
 181     vas = vaCreateBuffer(ctx->hwctx->display, ctx->va_context,
 182                          VAEncCodedBufferType,
 183                          MAX_OUTPUT_BUFFER_SIZE, 1, 0,
 184                          &pic->output_buffer);
 185     if (vas != VA_STATUS_SUCCESS) {
 186         av_log(avctx, AV_LOG_ERROR, "Failed to create bitstream "
 187                "output buffer: %d (%s).\n", vas, vaErrorStr(vas));
 188         err = AVERROR(ENOMEM);
 189         goto fail;
 190     }
 191     av_log(avctx, AV_LOG_DEBUG, "Output buffer is %#x.\n",
 192            pic->output_buffer);
 193
 194     if (ctx->codec->picture_params_size > 0) {
 195         pic->codec_picture_params = av_malloc(ctx->codec->picture_params_size);
 196         if (!pic->codec_picture_params)
 197             goto fail;
 198         memcpy(pic->codec_picture_params, ctx->codec_picture_params,
 199                ctx->codec->picture_params_size);
 200     } else {
 201         av_assert0(!ctx->codec_picture_params);
 202     }
 203
 204     pic->nb_param_buffers = 0;
 205
 206     if (pic->encode_order == 0) {
 207         // Global parameter buffers are set on the first picture only.
 208
 209         for (i = 0; i < ctx->nb_global_params; i++) {
 210             err = vaapi_encode_make_param_buffer(avctx, pic,
 211                                                  VAEncMiscParameterBufferType,
 212                                                  (char*)ctx->global_params[i],
 213                                                  ctx->global_params_size[i]);
 214             if (err < 0)
 215                 goto fail;
 216         }
 217     }
 218
 219     if (pic->type == PICTURE_TYPE_IDR && ctx->codec->init_sequence_params) {
 220         err = vaapi_encode_make_param_buffer(avctx, pic,
 221                                              VAEncSequenceParameterBufferType,
 222                                              ctx->codec_sequence_params,
 223                                              ctx->codec->sequence_params_size);
 224         if (err < 0)
 225             goto fail;
 226     }
 227
 228     if (ctx->codec->init_picture_params) {
 229         err = ctx->codec->init_picture_params(avctx, pic);
 230         if (err < 0) {
 231             av_log(avctx, AV_LOG_ERROR, "Failed to initialise picture "
 232                    "parameters: %d.\n", err);
 233             goto fail;
 234         }
 235         err = vaapi_encode_make_param_buffer(avctx, pic,
 236                                              VAEncPictureParameterBufferType,
 237                                              pic->codec_picture_params,
 238                                              ctx->codec->picture_params_size);
 239         if (err < 0)
 240             goto fail;
 241     }
 242
 243     if (pic->type == PICTURE_TYPE_IDR) {
 244         if (ctx->codec->write_sequence_header) {
 245             bit_len = 8 * sizeof(data);
 246             err = ctx->codec->write_sequence_header(avctx, data, &bit_len);
 247             if (err < 0) {
 248                 av_log(avctx, AV_LOG_ERROR, "Failed to write per-sequence "
 249                        "header: %d.\n", err);
 250                 goto fail;
 251             }
 252             err = vaapi_encode_make_packed_header(avctx, pic,
 253                                                   ctx->codec->sequence_header_type,
 254                                                   data, bit_len);
 255             if (err < 0)
 256                 goto fail;
 257         }
 258     }
 259
 260     if (ctx->codec->write_picture_header) {
 261         bit_len = 8 * sizeof(data);
 262         err = ctx->codec->write_picture_header(avctx, pic, data, &bit_len);
 263         if (err < 0) {
 264             av_log(avctx, AV_LOG_ERROR, "Failed to write per-picture "
 265                    "header: %d.\n", err);
 266             goto fail;
 267         }
 268         err = vaapi_encode_make_packed_header(avctx, pic,
 269                                               ctx->codec->picture_header_type,
 270                                               data, bit_len);
 271         if (err < 0)
 272             goto fail;
 273     }
 274
 275     if (ctx->codec->write_extra_buffer) {
 276         for (i = 0;; i++) {
 277             size_t len = sizeof(data);
 278             int type;
 279             err = ctx->codec->write_extra_buffer(avctx, pic, i, &type,
 280                                                  data, &len);
 281             if (err == AVERROR_EOF)
 282                 break;
 283             if (err < 0) {
 284                 av_log(avctx, AV_LOG_ERROR, "Failed to write extra "
 285                        "buffer %d: %d.\n", i, err);
 286                 goto fail;
 287             }
 288
 289             err = vaapi_encode_make_param_buffer(avctx, pic, type,
 290                                                  data, len);
 291             if (err < 0)
 292                 goto fail;
 293         }
 294     }
 295
 296     if (ctx->codec->write_extra_header) {
 297         for (i = 0;; i++) {
 298             int type;
 299             bit_len = 8 * sizeof(data);
 300             err = ctx->codec->write_extra_header(avctx, pic, i, &type,
 301                                                  data, &bit_len);
 302             if (err == AVERROR_EOF)
 303                 break;
 304             if (err < 0) {
 305                 av_log(avctx, AV_LOG_ERROR, "Failed to write extra "
 306                        "header %d: %d.\n", i, err);
 307                 goto fail;
 308             }
 309
 310             err = vaapi_encode_make_packed_header(avctx, pic, type,
 311                                                   data, bit_len);
 312             if (err < 0)
 313                 goto fail;
 314         }
 315     }
 316
 317     av_assert0(pic->nb_slices <= MAX_PICTURE_SLICES);
 318     for (i = 0; i < pic->nb_slices; i++) {
 319         slice = av_mallocz(sizeof(*slice));
 320         if (!slice) {
 321             err = AVERROR(ENOMEM);
 322             goto fail;
 323         }
 324         pic->slices[i] = slice;
 325
 326         if (ctx->codec->slice_params_size > 0) {
 327             slice->codec_slice_params = av_mallocz(ctx->codec->slice_params_size);
 328             if (!slice->codec_slice_params) {
 329                 err = AVERROR(ENOMEM);
 330                 goto fail;
 331             }
 332         }
 333
 334         if (ctx->codec->init_slice_params) {
 335             err = ctx->codec->init_slice_params(avctx, pic, slice);
 336             if (err < 0) {
 337                 av_log(avctx, AV_LOG_ERROR, "Failed to initalise slice "
 338                        "parameters: %d.\n", err);
 339                 goto fail;
 340             }
 341         }
 342
 343         if (ctx->codec->write_slice_header) {
 344             bit_len = 8 * sizeof(data);
 345             err = ctx->codec->write_slice_header(avctx, pic, slice,
 346                                                  data, &bit_len);
 347             if (err < 0) {
 348                 av_log(avctx, AV_LOG_ERROR, "Failed to write per-slice "
 349                        "header: %d.\n", err);
 350                 goto fail;
 351             }
 352             err = vaapi_encode_make_packed_header(avctx, pic,
 353                                                   ctx->codec->slice_header_type,
 354                                                   data, bit_len);
 355             if (err < 0)
 356                 goto fail;
 357         }
 358
 359         if (ctx->codec->init_slice_params) {
 360             err = vaapi_encode_make_param_buffer(avctx, pic,
 361                                                  VAEncSliceParameterBufferType,
 362                                                  slice->codec_slice_params,
 363                                                  ctx->codec->slice_params_size);
 364             if (err < 0)
 365                 goto fail;
 366         }
 367     }
 368
 369     vas = vaBeginPicture(ctx->hwctx->display, ctx->va_context,
 370                          pic->input_surface);
 371     if (vas != VA_STATUS_SUCCESS) {
 372         av_log(avctx, AV_LOG_ERROR, "Failed to begin picture encode issue: "
 373                "%d (%s).\n", vas, vaErrorStr(vas));
 374         err = AVERROR(EIO);
 375         goto fail_with_picture;
 376     }
 377
 378     vas = vaRenderPicture(ctx->hwctx->display, ctx->va_context,
 379                           pic->param_buffers, pic->nb_param_buffers);
 380     if (vas != VA_STATUS_SUCCESS) {
 381         av_log(avctx, AV_LOG_ERROR, "Failed to upload encode parameters: "
 382                "%d (%s).\n", vas, vaErrorStr(vas));
 383         err = AVERROR(EIO);
 384         goto fail_with_picture;
 385     }
 386
 387     vas = vaEndPicture(ctx->hwctx->display, ctx->va_context);
 388     if (vas != VA_STATUS_SUCCESS) {
 389         av_log(avctx, AV_LOG_ERROR, "Failed to end picture encode issue: "
 390                "%d (%s).\n", vas, vaErrorStr(vas));
 391         err = AVERROR(EIO);
 392         goto fail_at_end;
 393     }
 394
 395     pic->encode_issued = 1;
 396
 397     if (ctx->issue_mode == ISSUE_MODE_SERIALISE_EVERYTHING)
 398         return vaapi_encode_wait(avctx, pic);
 399     else
 400         return 0;
 401
 402 fail_with_picture:
 403     vaEndPicture(ctx->hwctx->display, ctx->va_context);
 404 fail:
 405     for(i = 0; i < pic->nb_param_buffers; i++)
 406         vaDestroyBuffer(ctx->hwctx->display, pic->param_buffers[i]);
 407 fail_at_end:
 408     av_freep(&pic->codec_picture_params);
 409     av_frame_free(&pic->recon_image);
 410     return err;
 411 }
 412
 413 static int vaapi_encode_output(AVCodecContext *avctx,
 414                                VAAPIEncodePicture *pic, AVPacket *pkt)
 415 {
 416     VAAPIEncodeContext *ctx = avctx->priv_data;
 417     VACodedBufferSegment *buf_list, *buf;
 418     VAStatus vas;
 419     int err;
 420
 421     err = vaapi_encode_wait(avctx, pic);
 422     if (err < 0)
 423         return err;
 424
 425     buf_list = NULL;
 426     vas = vaMapBuffer(ctx->hwctx->display, pic->output_buffer,
 427                       (void**)&buf_list);
 428     if (vas != VA_STATUS_SUCCESS) {
 429         av_log(avctx, AV_LOG_ERROR, "Failed to map output buffers: "
 430                "%d (%s).\n", vas, vaErrorStr(vas));
 431         err = AVERROR(EIO);
 432         goto fail;
 433     }
 434
 435     for (buf = buf_list; buf; buf = buf->next) {
 436         av_log(avctx, AV_LOG_DEBUG, "Output buffer: %u bytes "
 437                "(status %08x).\n", buf->size, buf->status);
 438
 439         err = av_new_packet(pkt, buf->size);
 440         if (err < 0)
 441             goto fail;
 442
 443         memcpy(pkt->data, buf->buf, buf->size);
 444     }
 445
 446     if (pic->type == PICTURE_TYPE_IDR)
 447         pkt->flags |= AV_PKT_FLAG_KEY;
 448
 449     pkt->pts = pic->pts;
 450
 451     vas = vaUnmapBuffer(ctx->hwctx->display, pic->output_buffer);
 452     if (vas != VA_STATUS_SUCCESS) {
 453         av_log(avctx, AV_LOG_ERROR, "Failed to unmap output buffers: "
 454                "%d (%s).\n", vas, vaErrorStr(vas));
 455         err = AVERROR(EIO);
 456         goto fail;
 457     }
 458
 459     vaDestroyBuffer(ctx->hwctx->display, pic->output_buffer);
 460     pic->output_buffer = VA_INVALID_ID;
 461
 462     av_log(avctx, AV_LOG_DEBUG, "Output read for pic %"PRId64"/%"PRId64".\n",
 463            pic->display_order, pic->encode_order);
 464     return 0;
 465
 466 fail:
 467     if (pic->output_buffer != VA_INVALID_ID) {
 468         vaUnmapBuffer(ctx->hwctx->display, pic->output_buffer);
 469         vaDestroyBuffer(ctx->hwctx->display, pic->output_buffer);
 470         pic->output_buffer = VA_INVALID_ID;
 471     }
 472     return err;
 473 }
 474
 475 static int vaapi_encode_discard(AVCodecContext *avctx,
 476                                 VAAPIEncodePicture *pic)
 477 {
 478     VAAPIEncodeContext *ctx = avctx->priv_data;
 479
 480     vaapi_encode_wait(avctx, pic);
 481
 482     if (pic->output_buffer != VA_INVALID_ID) {
 483         av_log(avctx, AV_LOG_DEBUG, "Discard output for pic "
 484                "%"PRId64"/%"PRId64".\n",
 485                pic->display_order, pic->encode_order);
 486
 487         vaDestroyBuffer(ctx->hwctx->display, pic->output_buffer);
 488         pic->output_buffer = VA_INVALID_ID;
 489     }
 490
 491     return 0;
 492 }
 493
 494 static VAAPIEncodePicture *vaapi_encode_alloc(void)
 495 {
 496     VAAPIEncodePicture *pic;
 497
 498     pic = av_mallocz(sizeof(*pic));
 499     if (!pic)
 500         return NULL;
 501
 502     pic->input_surface = VA_INVALID_ID;
 503     pic->recon_surface = VA_INVALID_ID;
 504     pic->output_buffer = VA_INVALID_ID;
 505
 506     return pic;
 507 }
 508
 509 static int vaapi_encode_free(AVCodecContext *avctx,
 510                              VAAPIEncodePicture *pic)
 511 {
 512     int i;
 513
 514     if (pic->encode_issued)
 515         vaapi_encode_discard(avctx, pic);
 516
 517     for (i = 0; i < pic->nb_slices; i++) {
 518         av_freep(&pic->slices[i]->priv_data);
 519         av_freep(&pic->slices[i]->codec_slice_params);
 520         av_freep(&pic->slices[i]);
 521     }
 522     av_freep(&pic->codec_picture_params);
 523
 524     av_frame_free(&pic->input_image);
 525     av_frame_free(&pic->recon_image);
 526
 527     // Output buffer should already be destroyed.
 528     av_assert0(pic->output_buffer == VA_INVALID_ID);
 529
 530     av_freep(&pic->priv_data);
 531     av_freep(&pic->codec_picture_params);
 532
 533     av_free(pic);
 534
 535     return 0;
 536 }
 537
 538 static int vaapi_encode_step(AVCodecContext *avctx,
 539                              VAAPIEncodePicture *target)
 540 {
 541     VAAPIEncodeContext *ctx = avctx->priv_data;
 542     VAAPIEncodePicture *pic;
 543     int i, err;
 544
 545     if (ctx->issue_mode == ISSUE_MODE_SERIALISE_EVERYTHING ||
 546         ctx->issue_mode == ISSUE_MODE_MINIMISE_LATENCY) {
 547         // These two modes are equivalent, except that we wait for
 548         // immediate completion on each operation if serialised.
 549
 550         if (!target) {
 551             // No target, nothing to do yet.
 552             return 0;
 553         }
 554
 555         if (target->encode_complete) {
 556             // Already done.
 557             return 0;
 558         }
 559
 560         pic = target;
 561         for (i = 0; i < pic->nb_refs; i++) {
 562             if (!pic->refs[i]->encode_complete) {
 563                 err = vaapi_encode_step(avctx, pic->refs[i]);
 564                 if (err < 0)
 565                     return err;
 566             }
 567         }
 568
 569         err = vaapi_encode_issue(avctx, pic);
 570         if (err < 0)
 571             return err;
 572
 573     } else if (ctx->issue_mode == ISSUE_MODE_MAXIMISE_THROUGHPUT) {
 574         int activity;
 575
 576         do {
 577             activity = 0;
 578             for (pic = ctx->pic_start; pic; pic = pic->next) {
 579                 if (!pic->input_available || pic->encode_issued)
 580                     continue;
 581                 for (i = 0; i < pic->nb_refs; i++) {
 582                     if (!pic->refs[i]->encode_issued)
 583                         break;
 584                 }
 585                 if (i < pic->nb_refs)
 586                     continue;
 587                 err = vaapi_encode_issue(avctx, pic);
 588                 if (err < 0)
 589                     return err;
 590                 activity = 1;
 591             }
 592         } while(activity);
 593
 594         if (target) {
 595             av_assert0(target->encode_issued && "broken dependencies?");
 596         }
 597
 598     } else {
 599         av_assert0(0);
 600     }
 601
 602     return 0;
 603 }
 604
 605 static int vaapi_encode_get_next(AVCodecContext *avctx,
 606                                  VAAPIEncodePicture **pic_out)
 607 {
 608     VAAPIEncodeContext *ctx = avctx->priv_data;
 609     VAAPIEncodePicture *start, *end, *pic;
 610     int i;
 611
 612     for (pic = ctx->pic_start; pic; pic = pic->next) {
 613         if (pic->next)
 614             av_assert0(pic->display_order + 1 == pic->next->display_order);
 615         if (pic->display_order == ctx->input_order) {
 616             *pic_out = pic;
 617             return 0;
 618         }
 619     }
 620
 621     if (ctx->input_order == 0) {
 622         // First frame is always an IDR frame.
 623         av_assert0(!ctx->pic_start && !ctx->pic_end);
 624
 625         pic = vaapi_encode_alloc();
 626         if (!pic)
 627             return AVERROR(ENOMEM);
 628
 629         pic->type = PICTURE_TYPE_IDR;
 630         pic->display_order = 0;
 631         pic->encode_order  = 0;
 632
 633         ctx->pic_start = ctx->pic_end = pic;
 634
 635         *pic_out = pic;
 636         return 0;
 637     }
 638
 639     pic = vaapi_encode_alloc();
 640     if (!pic)
 641         return AVERROR(ENOMEM);
 642
 643     if (ctx->p_per_i == 0 || ctx->p_counter == ctx->p_per_i) {
 644         if (ctx->i_per_idr == 0 || ctx->i_counter == ctx->i_per_idr) {
 645             pic->type = PICTURE_TYPE_IDR;
 646             ctx->i_counter = 0;
 647         } else {
 648             pic->type = PICTURE_TYPE_I;
 649             ++ctx->i_counter;
 650         }
 651         ctx->p_counter = 0;
 652     } else {
 653         pic->type = PICTURE_TYPE_P;
 654         pic->refs[0] = ctx->pic_end;
 655         pic->nb_refs = 1;
 656         ++ctx->p_counter;
 657     }
 658     start = end = pic;
 659
 660     if (pic->type != PICTURE_TYPE_IDR) {
 661         // If that was not an IDR frame, add B-frames display-before and
 662         // encode-after it.
 663
 664         for (i = 0; i < ctx->b_per_p; i++) {
 665             pic = vaapi_encode_alloc();
 666             if (!pic)
 667                 goto fail;
 668
 669             pic->type = PICTURE_TYPE_B;
 670             pic->refs[0] = ctx->pic_end;
 671             pic->refs[1] = end;
 672             pic->nb_refs = 2;
 673
 674             pic->next = start;
 675             pic->display_order = ctx->input_order + ctx->b_per_p - i - 1;
 676             pic->encode_order  = pic->display_order + 1;
 677             start = pic;
 678         }
 679     }
 680
 681     for (i = 0, pic = start; pic; i++, pic = pic->next) {
 682         pic->display_order = ctx->input_order + i;
 683         if (end->type == PICTURE_TYPE_IDR)
 684             pic->encode_order = ctx->input_order + i;
 685         else if (pic == end)
 686             pic->encode_order = ctx->input_order;
 687         else
 688             pic->encode_order = ctx->input_order + i + 1;
 689     }
 690
 691     av_assert0(ctx->pic_end);
 692     ctx->pic_end->next = start;
 693     ctx->pic_end = end;
 694
 695     *pic_out = start;
 696
 697     av_log(avctx, AV_LOG_DEBUG, "Pictures:");
 698     for (pic = ctx->pic_start; pic; pic = pic->next) {
 699         av_log(avctx, AV_LOG_DEBUG, " %s (%"PRId64"/%"PRId64")",
 700                picture_type_name[pic->type],
 701                pic->display_order, pic->encode_order);
 702     }
 703     av_log(avctx, AV_LOG_DEBUG, "\n");
 704
 705     return 0;
 706
 707 fail:
 708     while (start) {
 709         pic = start->next;
 710         vaapi_encode_free(avctx, start);
 711         start = pic;
 712     }
 713     return AVERROR(ENOMEM);
 714 }
 715
 716 static int vaapi_encode_mangle_end(AVCodecContext *avctx)
 717 {
 718     VAAPIEncodeContext *ctx = avctx->priv_data;
 719     VAAPIEncodePicture *pic, *last_pic, *next;
 720
 721     // Find the last picture we actually have input for.
 722     for (pic = ctx->pic_start; pic; pic = pic->next) {
 723         if (!pic->input_available)
 724             break;
 725         last_pic = pic;
 726     }
 727
 728     if (pic) {
 729         av_assert0(last_pic);
 730
 731         if (last_pic->type == PICTURE_TYPE_B) {
 732             // Some fixing up is required.  Change the type of this
 733             // picture to P, then modify preceding B references which
 734             // point beyond it to point at it instead.
 735
 736             last_pic->type = PICTURE_TYPE_P;
 737             last_pic->encode_order = last_pic->refs[1]->encode_order;
 738
 739             for (pic = ctx->pic_start; pic != last_pic; pic = pic->next) {
 740                 if (pic->type == PICTURE_TYPE_B &&
 741                     pic->refs[1] == last_pic->refs[1])
 742                     pic->refs[1] = last_pic;
 743             }
 744
 745             last_pic->nb_refs = 1;
 746             last_pic->refs[1] = NULL;
 747         } else {
 748             // We can use the current structure (no references point
 749             // beyond the end), but there are unused pics to discard.
 750         }
 751
 752         // Discard all following pics, they will never be used.
 753         for (pic = last_pic->next; pic; pic = next) {
 754             next = pic->next;
 755             vaapi_encode_free(avctx, pic);
 756         }
 757
 758         last_pic->next = NULL;
 759         ctx->pic_end = last_pic;
 760
 761     } else {
 762         // Input is available for all pictures, so we don't need to
 763         // mangle anything.
 764     }
 765
 766     av_log(avctx, AV_LOG_DEBUG, "Pictures at end of stream:");
 767     for (pic = ctx->pic_start; pic; pic = pic->next) {
 768         av_log(avctx, AV_LOG_DEBUG, " %s (%"PRId64"/%"PRId64")",
 769                picture_type_name[pic->type],
 770                pic->display_order, pic->encode_order);
 771     }
 772     av_log(avctx, AV_LOG_DEBUG, "\n");
 773
 774     return 0;
 775 }
 776
 777 static int vaapi_encode_clear_old(AVCodecContext *avctx)
 778 {
 779     VAAPIEncodeContext *ctx = avctx->priv_data;
 780     VAAPIEncodePicture *pic, *old;
 781     int i;
 782
 783     while (ctx->pic_start != ctx->pic_end) {
 784         old = ctx->pic_start;
 785         if (old->encode_order > ctx->output_order)
 786             break;
 787
 788         for (pic = old->next; pic; pic = pic->next) {
 789             if (pic->encode_complete)
 790                 continue;
 791             for (i = 0; i < pic->nb_refs; i++) {
 792                 if (pic->refs[i] == old) {
 793                     // We still need this picture because it's referred to
 794                     // directly by a later one, so it and all following
 795                     // pictures have to stay.
 796                     return 0;
 797                 }
 798             }
 799         }
 800
 801         pic = ctx->pic_start;
 802         ctx->pic_start = pic->next;
 803         vaapi_encode_free(avctx, pic);
 804     }
 805
 806     return 0;
 807 }
 808
 809 int ff_vaapi_encode2(AVCodecContext *avctx, AVPacket *pkt,
 810                      const AVFrame *input_image, int *got_packet)
 811 {
 812     VAAPIEncodeContext *ctx = avctx->priv_data;
 813     VAAPIEncodePicture *pic;
 814     int err;
 815
 816     if (input_image) {
 817         av_log(avctx, AV_LOG_DEBUG, "Encode frame: %ux%u (%"PRId64").\n",
 818                input_image->width, input_image->height, input_image->pts);
 819
 820         err = vaapi_encode_get_next(avctx, &pic);
 821         if (err) {
 822             av_log(avctx, AV_LOG_ERROR, "Input setup failed: %d.\n", err);
 823             return err;
 824         }
 825
 826         pic->input_image = av_frame_alloc();
 827         if (!pic->input_image) {
 828             err = AVERROR(ENOMEM);
 829             goto fail;
 830         }
 831         err = av_frame_ref(pic->input_image, input_image);
 832         if (err < 0)
 833             goto fail;
 834         pic->input_surface = (VASurfaceID)(uintptr_t)input_image->data[3];
 835         pic->pts = input_image->pts;
 836
 837         if (ctx->input_order == 0)
 838             ctx->first_pts = pic->pts;
 839         if (ctx->input_order == ctx->decode_delay)
 840             ctx->dts_pts_diff = pic->pts - ctx->first_pts;
 841         if (ctx->output_delay > 0)
 842             ctx->ts_ring[ctx->input_order % (3 * ctx->output_delay)] = pic->pts;
 843
 844         pic->input_available = 1;
 845
 846     } else {
 847         if (!ctx->end_of_stream) {
 848             err = vaapi_encode_mangle_end(avctx);
 849             if (err < 0)
 850                 goto fail;
 851             ctx->end_of_stream = 1;
 852         }
 853     }
 854
 855     ++ctx->input_order;
 856     ++ctx->output_order;
 857     av_assert0(ctx->output_order + ctx->output_delay + 1 == ctx->input_order);
 858
 859     for (pic = ctx->pic_start; pic; pic = pic->next)
 860         if (pic->encode_order == ctx->output_order)
 861             break;
 862
 863     // pic can be null here if we don't have a specific target in this
 864     // iteration.  We might still issue encodes if things can be overlapped,
 865     // even though we don't intend to output anything.
 866
 867     err = vaapi_encode_step(avctx, pic);
 868     if (err < 0) {
 869         av_log(avctx, AV_LOG_ERROR, "Encode failed: %d.\n", err);
 870         goto fail;
 871     }
 872
 873     if (!pic) {
 874         *got_packet = 0;
 875     } else {
 876         err = vaapi_encode_output(avctx, pic, pkt);
 877         if (err < 0) {
 878             av_log(avctx, AV_LOG_ERROR, "Output failed: %d.\n", err);
 879             goto fail;
 880         }
 881
 882         if (ctx->output_delay == 0) {
 883             pkt->dts = pkt->pts;
 884         } else if (ctx->output_order < ctx->decode_delay) {
 885             if (ctx->ts_ring[ctx->output_order] < INT64_MIN + ctx->dts_pts_diff)
 886                 pkt->dts = INT64_MIN;
 887             else
 888                 pkt->dts = ctx->ts_ring[ctx->output_order] - ctx->dts_pts_diff;
 889         } else {
 890             pkt->dts = ctx->ts_ring[(ctx->output_order - ctx->decode_delay) %
 891                                     (3 * ctx->output_delay)];
 892         }
 893
 894         *got_packet = 1;
 895     }
 896
 897     err = vaapi_encode_clear_old(avctx);
 898     if (err < 0) {
 899         av_log(avctx, AV_LOG_ERROR, "List clearing failed: %d.\n", err);
 900         goto fail;
 901     }
 902
 903     return 0;
 904
 905 fail:
 906     // Unclear what to clean up on failure.  There are probably some things we
 907     // could do usefully clean up here, but for now just leave them for uninit()
 908     // to do instead.
 909     return err;
 910 }
 911
 912 static av_cold int vaapi_encode_check_config(AVCodecContext *avctx)
 913 {
 914     VAAPIEncodeContext *ctx = avctx->priv_data;
 915     VAStatus vas;
 916     int i, n, err;
 917     VAProfile    *profiles    = NULL;
 918     VAEntrypoint *entrypoints = NULL;
 919     VAConfigAttrib attr[] = {
 920         { VAConfigAttribRateControl     },
 921         { VAConfigAttribEncMaxRefFrames },
 922     };
 923
 924     n = vaMaxNumProfiles(ctx->hwctx->display);
 925     profiles = av_malloc_array(n, sizeof(VAProfile));
 926     if (!profiles) {
 927         err = AVERROR(ENOMEM);
 928         goto fail;
 929     }
 930     vas = vaQueryConfigProfiles(ctx->hwctx->display, profiles, &n);
 931     if (vas != VA_STATUS_SUCCESS) {
 932         av_log(ctx, AV_LOG_ERROR, "Failed to query profiles: %d (%s).\n",
 933                vas, vaErrorStr(vas));
 934         err = AVERROR(ENOSYS);
 935         goto fail;
 936     }
 937     for (i = 0; i < n; i++) {
 938         if (profiles[i] == ctx->va_profile)
 939             break;
 940     }
 941     if (i >= n) {
 942         av_log(ctx, AV_LOG_ERROR, "Encoding profile not found (%d).\n",
 943                ctx->va_profile);
 944         err = AVERROR(ENOSYS);
 945         goto fail;
 946     }
 947
 948     n = vaMaxNumEntrypoints(ctx->hwctx->display);
 949     entrypoints = av_malloc_array(n, sizeof(VAEntrypoint));
 950     if (!entrypoints) {
 951         err = AVERROR(ENOMEM);
 952         goto fail;
 953     }
 954     vas = vaQueryConfigEntrypoints(ctx->hwctx->display, ctx->va_profile,
 955                                    entrypoints, &n);
 956     if (vas != VA_STATUS_SUCCESS) {
 957         av_log(ctx, AV_LOG_ERROR, "Failed to query entrypoints for "
 958                "profile %u: %d (%s).\n", ctx->va_profile,
 959                vas, vaErrorStr(vas));
 960         err = AVERROR(ENOSYS);
 961         goto fail;
 962     }
 963     for (i = 0; i < n; i++) {
 964         if (entrypoints[i] == ctx->va_entrypoint)
 965             break;
 966     }
 967     if (i >= n) {
 968         av_log(ctx, AV_LOG_ERROR, "Encoding entrypoint not found "
 969                "(%d / %d).\n", ctx->va_profile, ctx->va_entrypoint);
 970         err = AVERROR(ENOSYS);
 971         goto fail;
 972     }
 973
 974     vas = vaGetConfigAttributes(ctx->hwctx->display,
 975                                 ctx->va_profile, ctx->va_entrypoint,
 976                                 attr, FF_ARRAY_ELEMS(attr));
 977     if (vas != VA_STATUS_SUCCESS) {
 978         av_log(avctx, AV_LOG_ERROR, "Failed to fetch config "
 979                "attributes: %d (%s).\n", vas, vaErrorStr(vas));
 980         return AVERROR(EINVAL);
 981     }
 982
 983     for (i = 0; i < FF_ARRAY_ELEMS(attr); i++) {
 984         if (attr[i].value == VA_ATTRIB_NOT_SUPPORTED) {
 985             // Unfortunately we have to treat this as "don't know" and hope
 986             // for the best, because the Intel MJPEG encoder returns this
 987             // for all the interesting attributes.
 988             continue;
 989         }
 990         switch (attr[i].type) {
 991         case VAConfigAttribRateControl:
 992             if (!(ctx->va_rc_mode & attr[i].value)) {
 993                 av_log(avctx, AV_LOG_ERROR, "Rate control mode is not "
 994                        "supported: %x\n", attr[i].value);
 995                 err = AVERROR(EINVAL);
 996                 goto fail;
 997             }
 998             break;
 999         case VAConfigAttribEncMaxRefFrames:
1000         {
1001             unsigned int ref_l0 = attr[i].value & 0xffff;
1002             unsigned int ref_l1 = (attr[i].value >> 16) & 0xffff;
1003
1004             if (avctx->gop_size > 1 && ref_l0 < 1) {
1005                 av_log(avctx, AV_LOG_ERROR, "P frames are not "
1006                        "supported (%x).\n", attr[i].value);
1007                 err = AVERROR(EINVAL);
1008                 goto fail;
1009             }
1010             if (avctx->max_b_frames > 0 && ref_l1 < 1) {
1011                 av_log(avctx, AV_LOG_ERROR, "B frames are not "
1012                        "supported (%x).\n", attr[i].value);
1013                 err = AVERROR(EINVAL);
1014                 goto fail;
1015             }
1016         }
1017         break;
1018         }
1019     }
1020
1021     err = 0;
1022 fail:
1023     av_freep(&profiles);
1024     av_freep(&entrypoints);
1025     return err;
1026 }
1027
1028 av_cold int ff_vaapi_encode_init(AVCodecContext *avctx,
1029                                  const VAAPIEncodeType *type)
1030 {
1031     VAAPIEncodeContext *ctx = avctx->priv_data;
1032     AVVAAPIFramesContext *recon_hwctx = NULL;
1033     AVVAAPIHWConfig *hwconfig = NULL;
1034     AVHWFramesConstraints *constraints = NULL;
1035     enum AVPixelFormat recon_format;
1036     VAStatus vas;
1037     int err, i;
1038
1039     if (!avctx->hw_frames_ctx) {
1040         av_log(avctx, AV_LOG_ERROR, "A hardware frames reference is "
1041                "required to associate the encoding device.\n");
1042         return AVERROR(EINVAL);
1043     }
1044
1045     ctx->codec = type;
1046     ctx->codec_options = ctx->codec_options_data;
1047
1048     ctx->va_config  = VA_INVALID_ID;
1049     ctx->va_context = VA_INVALID_ID;
1050
1051     ctx->priv_data = av_mallocz(type->priv_data_size);
1052     if (!ctx->priv_data) {
1053         err = AVERROR(ENOMEM);
1054         goto fail;
1055     }
1056
1057     ctx->input_frames_ref = av_buffer_ref(avctx->hw_frames_ctx);
1058     if (!ctx->input_frames_ref) {
1059         err = AVERROR(ENOMEM);
1060         goto fail;
1061     }
1062     ctx->input_frames = (AVHWFramesContext*)ctx->input_frames_ref->data;
1063
1064     ctx->device_ref = av_buffer_ref(ctx->input_frames->device_ref);
1065     if (!ctx->device_ref) {
1066         err = AVERROR(ENOMEM);
1067         goto fail;
1068     }
1069     ctx->device = (AVHWDeviceContext*)ctx->device_ref->data;
1070     ctx->hwctx = ctx->device->hwctx;
1071
1072     err = ctx->codec->init(avctx);
1073     if (err < 0)
1074         goto fail;
1075
1076     err = vaapi_encode_check_config(avctx);
1077     if (err < 0)
1078         goto fail;
1079
1080     vas = vaCreateConfig(ctx->hwctx->display,
1081                          ctx->va_profile, ctx->va_entrypoint,
1082                          ctx->config_attributes, ctx->nb_config_attributes,
1083                          &ctx->va_config);
1084     if (vas != VA_STATUS_SUCCESS) {
1085         av_log(avctx, AV_LOG_ERROR, "Failed to create encode pipeline "
1086                "configuration: %d (%s).\n", vas, vaErrorStr(vas));
1087         err = AVERROR(EIO);
1088         goto fail;
1089     }
1090
1091     hwconfig = av_hwdevice_hwconfig_alloc(ctx->device_ref);
1092     if (!hwconfig) {
1093         err = AVERROR(ENOMEM);
1094         goto fail;
1095     }
1096     hwconfig->config_id = ctx->va_config;
1097
1098     constraints = av_hwdevice_get_hwframe_constraints(ctx->device_ref,
1099                                                       hwconfig);
1100     if (!constraints) {
1101         err = AVERROR(ENOMEM);
1102         goto fail;
1103     }
1104
1105     // Probably we can use the input surface format as the surface format
1106     // of the reconstructed frames.  If not, we just pick the first (only?)
1107     // format in the valid list and hope that it all works.
1108     recon_format = AV_PIX_FMT_NONE;
1109     if (constraints->valid_sw_formats) {
1110         for (i = 0; constraints->valid_sw_formats[i] != AV_PIX_FMT_NONE; i++) {
1111             if (ctx->input_frames->sw_format ==
1112                 constraints->valid_sw_formats[i]) {
1113                 recon_format = ctx->input_frames->sw_format;
1114                 break;
1115             }
1116         }
1117         if (recon_format == AV_PIX_FMT_NONE)
1118             recon_format = constraints->valid_sw_formats[i];
1119     } else {
1120         // No idea what to use; copy input format.
1121         recon_format = ctx->input_frames->sw_format;
1122     }
1123     av_log(avctx, AV_LOG_DEBUG, "Using %s as format of "
1124            "reconstructed frames.\n", av_get_pix_fmt_name(recon_format));
1125
1126     if (ctx->aligned_width  < constraints->min_width  ||
1127         ctx->aligned_height < constraints->min_height ||
1128         ctx->aligned_width  > constraints->max_width ||
1129         ctx->aligned_height > constraints->max_height) {
1130         av_log(avctx, AV_LOG_ERROR, "Hardware does not support encoding at "
1131                "size %dx%d (constraints: width %d-%d height %d-%d).\n",
1132                ctx->aligned_width, ctx->aligned_height,
1133                constraints->min_width,  constraints->max_width,
1134                constraints->min_height, constraints->max_height);
1135         err = AVERROR(EINVAL);
1136         goto fail;
1137     }
1138
1139     av_freep(&hwconfig);
1140     av_hwframe_constraints_free(&constraints);
1141
1142     ctx->recon_frames_ref = av_hwframe_ctx_alloc(ctx->device_ref);
1143     if (!ctx->recon_frames_ref) {
1144         err = AVERROR(ENOMEM);
1145         goto fail;
1146     }
1147     ctx->recon_frames = (AVHWFramesContext*)ctx->recon_frames_ref->data;
1148
1149     ctx->recon_frames->format    = AV_PIX_FMT_VAAPI;
1150     ctx->recon_frames->sw_format = recon_format;
1151     ctx->recon_frames->width     = ctx->aligned_width;
1152     ctx->recon_frames->height    = ctx->aligned_height;
1153     ctx->recon_frames->initial_pool_size = ctx->nb_recon_frames;
1154
1155     err = av_hwframe_ctx_init(ctx->recon_frames_ref);
1156     if (err < 0) {
1157         av_log(avctx, AV_LOG_ERROR, "Failed to initialise reconstructed "
1158                "frame context: %d.\n", err);
1159         goto fail;
1160     }
1161     recon_hwctx = ctx->recon_frames->hwctx;
1162
1163     vas = vaCreateContext(ctx->hwctx->display, ctx->va_config,
1164                           ctx->aligned_width, ctx->aligned_height,
1165                           VA_PROGRESSIVE,
1166                           recon_hwctx->surface_ids,
1167                           recon_hwctx->nb_surfaces,
1168                           &ctx->va_context);
1169     if (vas != VA_STATUS_SUCCESS) {
1170         av_log(avctx, AV_LOG_ERROR, "Failed to create encode pipeline "
1171                "context: %d (%s).\n", vas, vaErrorStr(vas));
1172         err = AVERROR(EIO);
1173         goto fail;
1174     }
1175
1176     ctx->input_order  = 0;
1177     ctx->output_delay = avctx->max_b_frames;
1178     ctx->decode_delay = 1;
1179     ctx->output_order = - ctx->output_delay - 1;
1180
1181     if (ctx->codec->sequence_params_size > 0) {
1182         ctx->codec_sequence_params =
1183             av_mallocz(ctx->codec->sequence_params_size);
1184         if (!ctx->codec_sequence_params) {
1185             err = AVERROR(ENOMEM);
1186             goto fail;
1187         }
1188     }
1189     if (ctx->codec->picture_params_size > 0) {
1190         ctx->codec_picture_params =
1191             av_mallocz(ctx->codec->picture_params_size);
1192         if (!ctx->codec_picture_params) {
1193             err = AVERROR(ENOMEM);
1194             goto fail;
1195         }
1196     }
1197
1198     if (ctx->codec->init_sequence_params) {
1199         err = ctx->codec->init_sequence_params(avctx);
1200         if (err < 0) {
1201             av_log(avctx, AV_LOG_ERROR, "Codec sequence initialisation "
1202                    "failed: %d.\n", err);
1203             goto fail;
1204         }
1205     }
1206
1207     // All I are IDR for now.
1208     ctx->i_per_idr = 0;
1209     ctx->p_per_i = ((avctx->gop_size + avctx->max_b_frames) /
1210                     (avctx->max_b_frames + 1));
1211     ctx->b_per_p = avctx->max_b_frames;
1212
1213     // This should be configurable somehow.  (Needs testing on a machine
1214     // where it actually overlaps properly, though.)
1215     ctx->issue_mode = ISSUE_MODE_MAXIMISE_THROUGHPUT;
1216
1217     return 0;
1218
1219 fail:
1220     av_freep(&hwconfig);
1221     av_hwframe_constraints_free(&constraints);
1222     ff_vaapi_encode_close(avctx);
1223     return err;
1224 }
1225
1226 av_cold int ff_vaapi_encode_close(AVCodecContext *avctx)
1227 {
1228     VAAPIEncodeContext *ctx = avctx->priv_data;
1229     VAAPIEncodePicture *pic, *next;
1230
1231     for (pic = ctx->pic_start; pic; pic = next) {
1232         next = pic->next;
1233         vaapi_encode_free(avctx, pic);
1234     }
1235
1236     if (ctx->va_context != VA_INVALID_ID) {
1237         vaDestroyContext(ctx->hwctx->display, ctx->va_context);
1238         ctx->va_context = VA_INVALID_ID;
1239     }
1240
1241     if (ctx->va_config != VA_INVALID_ID) {
1242         vaDestroyConfig(ctx->hwctx->display, ctx->va_config);
1243         ctx->va_config = VA_INVALID_ID;
1244     }
1245
1246     if (ctx->codec->close)
1247         ctx->codec->close(avctx);
1248
1249     av_freep(&ctx->codec_sequence_params);
1250     av_freep(&ctx->codec_picture_params);
1251
1252     av_buffer_unref(&ctx->recon_frames_ref);
1253     av_buffer_unref(&ctx->input_frames_ref);
1254     av_buffer_unref(&ctx->device_ref);
1255
1256     av_freep(&ctx->priv_data);
1257
1258     return 0;
1259 }