git.sesse.net Git - ffmpeg/blob - libavcodec/dxva2_h264.c

   1 /*
   2  * DXVA2 H.264 HW acceleration.
   3  *
   4  * copyright (c) 2009 Laurent Aimar
   5  *
   6  * This file is part of Libav.
   7  *
   8  * Libav is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * Libav is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with Libav; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 #include "dxva2_internal.h"
  24 #include "h264dec.h"
  25 #include "h264data.h"
  26 #include "h264_ps.h"
  27 #include "mpegutils.h"
  28
  29 struct dxva2_picture_context {
  30     DXVA_PicParams_H264   pp;
  31     DXVA_Qmatrix_H264     qm;
  32     unsigned              slice_count;
  33     DXVA_Slice_H264_Short slice_short[MAX_SLICES];
  34     DXVA_Slice_H264_Long  slice_long[MAX_SLICES];
  35     const uint8_t         *bitstream;
  36     unsigned              bitstream_size;
  37 };
  38
  39 static void fill_picture_entry(DXVA_PicEntry_H264 *pic,
  40                                unsigned index, unsigned flag)
  41 {
  42     assert((index&0x7f) == index && (flag&0x01) == flag);
  43     pic->bPicEntry = index | (flag << 7);
  44 }
  45
  46 static void fill_picture_parameters(const AVCodecContext *avctx, AVDXVAContext *ctx, const H264Context *h,
  47                                     DXVA_PicParams_H264 *pp)
  48 {
  49     const H264Picture *current_picture = h->cur_pic_ptr;
  50     const SPS *sps = h->ps.sps;
  51     const PPS *pps = h->ps.pps;
  52     int i, j;
  53
  54     memset(pp, 0, sizeof(*pp));
  55     /* Configure current picture */
  56     fill_picture_entry(&pp->CurrPic,
  57                        ff_dxva2_get_surface_index(avctx, ctx, current_picture->f),
  58                        h->picture_structure == PICT_BOTTOM_FIELD);
  59     /* Configure the set of references */
  60     pp->UsedForReferenceFlags  = 0;
  61     pp->NonExistingFrameFlags  = 0;
  62     for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->RefFrameList); i++) {
  63         const H264Picture *r;
  64         if (j < h->short_ref_count) {
  65             r = h->short_ref[j++];
  66         } else {
  67             r = NULL;
  68             while (!r && j < h->short_ref_count + 16)
  69                 r = h->long_ref[j++ - h->short_ref_count];
  70         }
  71         if (r) {
  72             fill_picture_entry(&pp->RefFrameList[i],
  73                                ff_dxva2_get_surface_index(avctx, ctx, r->f),
  74                                r->long_ref != 0);
  75
  76             if ((r->reference & PICT_TOP_FIELD) && r->field_poc[0] != INT_MAX)
  77                 pp->FieldOrderCntList[i][0] = r->field_poc[0];
  78             if ((r->reference & PICT_BOTTOM_FIELD) && r->field_poc[1] != INT_MAX)
  79                 pp->FieldOrderCntList[i][1] = r->field_poc[1];
  80
  81             pp->FrameNumList[i] = r->long_ref ? r->pic_id : r->frame_num;
  82             if (r->reference & PICT_TOP_FIELD)
  83                 pp->UsedForReferenceFlags |= 1 << (2*i + 0);
  84             if (r->reference & PICT_BOTTOM_FIELD)
  85                 pp->UsedForReferenceFlags |= 1 << (2*i + 1);
  86         } else {
  87             pp->RefFrameList[i].bPicEntry = 0xff;
  88             pp->FieldOrderCntList[i][0]   = 0;
  89             pp->FieldOrderCntList[i][1]   = 0;
  90             pp->FrameNumList[i]           = 0;
  91         }
  92     }
  93
  94     pp->wFrameWidthInMbsMinus1        = h->mb_width  - 1;
  95     pp->wFrameHeightInMbsMinus1       = h->mb_height - 1;
  96     pp->num_ref_frames                = sps->ref_frame_count;
  97
  98     pp->wBitFields                    = ((h->picture_structure != PICT_FRAME) <<  0) |
  99                                         ((sps->mb_aff &&
 100                                         (h->picture_structure == PICT_FRAME)) <<  1) |
 101                                         (sps->residual_color_transform_flag   <<  2) |
 102                                         /* sp_for_switch_flag (not implemented by Libav) */
 103                                         (0                                    <<  3) |
 104                                         (sps->chroma_format_idc               <<  4) |
 105                                         ((h->nal_ref_idc != 0)                <<  6) |
 106                                         (pps->constrained_intra_pred          <<  7) |
 107                                         (pps->weighted_pred                   <<  8) |
 108                                         (pps->weighted_bipred_idc             <<  9) |
 109                                         /* MbsConsecutiveFlag */
 110                                         (1                                    << 11) |
 111                                         (sps->frame_mbs_only_flag             << 12) |
 112                                         (pps->transform_8x8_mode              << 13) |
 113                                         ((sps->level_idc >= 31)               << 14) |
 114                                         /* IntraPicFlag (Modified if we detect a non
 115                                          * intra slice in dxva2_h264_decode_slice) */
 116                                         (1                                    << 15);
 117
 118     pp->bit_depth_luma_minus8         = sps->bit_depth_luma - 8;
 119     pp->bit_depth_chroma_minus8       = sps->bit_depth_chroma - 8;
 120     if (DXVA_CONTEXT_WORKAROUND(avctx, ctx) & FF_DXVA2_WORKAROUND_SCALING_LIST_ZIGZAG)
 121         pp->Reserved16Bits            = 0;
 122     else if (DXVA_CONTEXT_WORKAROUND(avctx, ctx) & FF_DXVA2_WORKAROUND_INTEL_CLEARVIDEO)
 123         pp->Reserved16Bits            = 0x34c;
 124     else
 125         pp->Reserved16Bits            = 3; /* FIXME is there a way to detect the right mode ? */
 126     pp->StatusReportFeedbackNumber    = 1 + DXVA_CONTEXT_REPORT_ID(avctx, ctx)++;
 127     pp->CurrFieldOrderCnt[0] = 0;
 128     if ((h->picture_structure & PICT_TOP_FIELD) &&
 129         current_picture->field_poc[0] != INT_MAX)
 130         pp->CurrFieldOrderCnt[0] = current_picture->field_poc[0];
 131     pp->CurrFieldOrderCnt[1] = 0;
 132     if ((h->picture_structure & PICT_BOTTOM_FIELD) &&
 133         current_picture->field_poc[1] != INT_MAX)
 134         pp->CurrFieldOrderCnt[1] = current_picture->field_poc[1];
 135     pp->pic_init_qs_minus26           = pps->init_qs - 26;
 136     pp->chroma_qp_index_offset        = pps->chroma_qp_index_offset[0];
 137     pp->second_chroma_qp_index_offset = pps->chroma_qp_index_offset[1];
 138     pp->ContinuationFlag              = 1;
 139     pp->pic_init_qp_minus26           = pps->init_qp - 26;
 140     pp->num_ref_idx_l0_active_minus1  = pps->ref_count[0] - 1;
 141     pp->num_ref_idx_l1_active_minus1  = pps->ref_count[1] - 1;
 142     pp->Reserved8BitsA                = 0;
 143     pp->frame_num                     = h->poc.frame_num;
 144     pp->log2_max_frame_num_minus4     = sps->log2_max_frame_num - 4;
 145     pp->pic_order_cnt_type            = sps->poc_type;
 146     if (sps->poc_type == 0)
 147         pp->log2_max_pic_order_cnt_lsb_minus4 = sps->log2_max_poc_lsb - 4;
 148     else if (sps->poc_type == 1)
 149         pp->delta_pic_order_always_zero_flag = sps->delta_pic_order_always_zero_flag;
 150     pp->direct_8x8_inference_flag     = sps->direct_8x8_inference_flag;
 151     pp->entropy_coding_mode_flag      = pps->cabac;
 152     pp->pic_order_present_flag        = pps->pic_order_present;
 153     pp->num_slice_groups_minus1       = pps->slice_group_count - 1;
 154     pp->slice_group_map_type          = pps->mb_slice_group_map_type;
 155     pp->deblocking_filter_control_present_flag = pps->deblocking_filter_parameters_present;
 156     pp->redundant_pic_cnt_present_flag= pps->redundant_pic_cnt_present;
 157     pp->Reserved8BitsB                = 0;
 158     pp->slice_group_change_rate_minus1= 0;  /* XXX not implemented by Libav */
 159     //pp->SliceGroupMap[810];               /* XXX not implemented by Libav */
 160 }
 161
 162 static void fill_scaling_lists(const AVCodecContext *avctx, AVDXVAContext *ctx, const H264Context *h, DXVA_Qmatrix_H264 *qm)
 163 {
 164     unsigned i, j;
 165     const PPS *pps = h->ps.pps;
 166     memset(qm, 0, sizeof(*qm));
 167     if (DXVA_CONTEXT_WORKAROUND(avctx, ctx) & FF_DXVA2_WORKAROUND_SCALING_LIST_ZIGZAG) {
 168         for (i = 0; i < 6; i++)
 169             for (j = 0; j < 16; j++)
 170                 qm->bScalingLists4x4[i][j] = pps->scaling_matrix4[i][j];
 171
 172         for (i = 0; i < 64; i++) {
 173             qm->bScalingLists8x8[0][i] = pps->scaling_matrix8[0][i];
 174             qm->bScalingLists8x8[1][i] = pps->scaling_matrix8[3][i];
 175         }
 176     } else {
 177         for (i = 0; i < 6; i++)
 178             for (j = 0; j < 16; j++)
 179                 qm->bScalingLists4x4[i][j] = pps->scaling_matrix4[i][ff_zigzag_scan[j]];
 180
 181         for (i = 0; i < 64; i++) {
 182             qm->bScalingLists8x8[0][i] = pps->scaling_matrix8[0][ff_zigzag_direct[i]];
 183             qm->bScalingLists8x8[1][i] = pps->scaling_matrix8[3][ff_zigzag_direct[i]];
 184         }
 185     }
 186 }
 187
 188 static int is_slice_short(const AVCodecContext *avctx, AVDXVAContext *ctx)
 189 {
 190     assert(DXVA_CONTEXT_CFG_BITSTREAM(avctx, ctx) == 1 ||
 191            DXVA_CONTEXT_CFG_BITSTREAM(avctx, ctx) == 2);
 192     return DXVA_CONTEXT_CFG_BITSTREAM(avctx, ctx) == 2;
 193 }
 194
 195 static void fill_slice_short(DXVA_Slice_H264_Short *slice,
 196                              unsigned position, unsigned size)
 197 {
 198     memset(slice, 0, sizeof(*slice));
 199     slice->BSNALunitDataLocation = position;
 200     slice->SliceBytesInBuffer    = size;
 201     slice->wBadSliceChopping     = 0;
 202 }
 203
 204 static int get_refpic_index(const DXVA_PicParams_H264 *pp, int surface_index)
 205 {
 206     int i;
 207     for (i = 0; i < FF_ARRAY_ELEMS(pp->RefFrameList); i++) {
 208         if ((pp->RefFrameList[i].bPicEntry & 0x7f) == surface_index)
 209           return i;
 210     }
 211     return 0x7f;
 212 }
 213
 214 static void fill_slice_long(AVCodecContext *avctx, DXVA_Slice_H264_Long *slice,
 215                             const DXVA_PicParams_H264 *pp, unsigned position, unsigned size)
 216 {
 217     const H264Context *h = avctx->priv_data;
 218     H264SliceContext *sl = &h->slice_ctx[0];
 219     AVDXVAContext *ctx = DXVA_CONTEXT(avctx);
 220     unsigned list;
 221
 222     memset(slice, 0, sizeof(*slice));
 223     slice->BSNALunitDataLocation = position;
 224     slice->SliceBytesInBuffer    = size;
 225     slice->wBadSliceChopping     = 0;
 226
 227     slice->first_mb_in_slice     = (sl->mb_y >> FIELD_OR_MBAFF_PICTURE(h)) * h->mb_width + sl->mb_x;
 228     slice->NumMbsForSlice        = 0; /* XXX it is set once we have all slices */
 229     slice->BitOffsetToSliceData  = get_bits_count(&sl->gb);
 230     slice->slice_type            = ff_h264_get_slice_type(sl);
 231     if (sl->slice_type_fixed)
 232         slice->slice_type += 5;
 233     slice->luma_log2_weight_denom       = sl->pwt.luma_log2_weight_denom;
 234     slice->chroma_log2_weight_denom     = sl->pwt.chroma_log2_weight_denom;
 235     if (sl->list_count > 0)
 236         slice->num_ref_idx_l0_active_minus1 = sl->ref_count[0] - 1;
 237     if (sl->list_count > 1)
 238         slice->num_ref_idx_l1_active_minus1 = sl->ref_count[1] - 1;
 239     slice->slice_alpha_c0_offset_div2   = sl->slice_alpha_c0_offset / 2;
 240     slice->slice_beta_offset_div2       = sl->slice_beta_offset     / 2;
 241     slice->Reserved8Bits                = 0;
 242
 243     for (list = 0; list < 2; list++) {
 244         unsigned i;
 245         for (i = 0; i < FF_ARRAY_ELEMS(slice->RefPicList[list]); i++) {
 246             if (list < sl->list_count && i < sl->ref_count[list]) {
 247                 const H264Picture *r = sl->ref_list[list][i].parent;
 248                 unsigned plane;
 249                 unsigned index;
 250                 if (DXVA_CONTEXT_WORKAROUND(avctx, ctx) & FF_DXVA2_WORKAROUND_INTEL_CLEARVIDEO)
 251                     index = ff_dxva2_get_surface_index(avctx, ctx, r->f);
 252                 else
 253                     index = get_refpic_index(pp, ff_dxva2_get_surface_index(avctx, ctx, r->f));
 254                 fill_picture_entry(&slice->RefPicList[list][i], index,
 255                                    r->reference == PICT_BOTTOM_FIELD);
 256                 for (plane = 0; plane < 3; plane++) {
 257                     int w, o;
 258                     if (plane == 0 && sl->pwt.luma_weight_flag[list]) {
 259                         w = sl->pwt.luma_weight[i][list][0];
 260                         o = sl->pwt.luma_weight[i][list][1];
 261                     } else if (plane >= 1 && sl->pwt.chroma_weight_flag[list]) {
 262                         w = sl->pwt.chroma_weight[i][list][plane-1][0];
 263                         o = sl->pwt.chroma_weight[i][list][plane-1][1];
 264                     } else {
 265                         w = 1 << (plane == 0 ? sl->pwt.luma_log2_weight_denom :
 266                                                sl->pwt.chroma_log2_weight_denom);
 267                         o = 0;
 268                     }
 269                     slice->Weights[list][i][plane][0] = w;
 270                     slice->Weights[list][i][plane][1] = o;
 271                 }
 272             } else {
 273                 unsigned plane;
 274                 slice->RefPicList[list][i].bPicEntry = 0xff;
 275                 for (plane = 0; plane < 3; plane++) {
 276                     slice->Weights[list][i][plane][0] = 0;
 277                     slice->Weights[list][i][plane][1] = 0;
 278                 }
 279             }
 280         }
 281     }
 282     slice->slice_qs_delta    = 0; /* XXX not implemented by Libav */
 283     slice->slice_qp_delta    = sl->qscale - h->ps.pps->init_qp;
 284     slice->redundant_pic_cnt = sl->redundant_pic_count;
 285     if (sl->slice_type == AV_PICTURE_TYPE_B)
 286         slice->direct_spatial_mv_pred_flag = sl->direct_spatial_mv_pred;
 287     slice->cabac_init_idc = h->ps.pps->cabac ? sl->cabac_init_idc : 0;
 288     if (sl->deblocking_filter < 2)
 289         slice->disable_deblocking_filter_idc = 1 - sl->deblocking_filter;
 290     else
 291         slice->disable_deblocking_filter_idc = sl->deblocking_filter;
 292     slice->slice_id = h->current_slice - 1;
 293 }
 294
 295 static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
 296                                              DECODER_BUFFER_DESC *bs,
 297                                              DECODER_BUFFER_DESC *sc)
 298 {
 299     const H264Context *h = avctx->priv_data;
 300     const unsigned mb_count = h->mb_width * h->mb_height;
 301     AVDXVAContext *ctx = DXVA_CONTEXT(avctx);
 302     const H264Picture *current_picture = h->cur_pic_ptr;
 303     struct dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
 304     DXVA_Slice_H264_Short *slice = NULL;
 305     void     *dxva_data_ptr;
 306     uint8_t  *dxva_data, *current, *end;
 307     unsigned dxva_size;
 308     void     *slice_data;
 309     unsigned slice_size;
 310     unsigned padding;
 311     unsigned i;
 312     unsigned type;
 313
 314     /* Create an annex B bitstream buffer with only slice NAL and finalize slice */
 315 #if CONFIG_D3D11VA
 316     if (ff_dxva2_is_d3d11(avctx)) {
 317         type = D3D11_VIDEO_DECODER_BUFFER_BITSTREAM;
 318         if (FAILED(ID3D11VideoContext_GetDecoderBuffer(D3D11VA_CONTEXT(ctx)->video_context,
 319                                                        D3D11VA_CONTEXT(ctx)->decoder,
 320                                                        type,
 321                                                        &dxva_size, &dxva_data_ptr)))
 322             return -1;
 323     }
 324 #endif
 325 #if CONFIG_DXVA2
 326     if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD) {
 327         type = DXVA2_BitStreamDateBufferType;
 328         if (FAILED(IDirectXVideoDecoder_GetBuffer(DXVA2_CONTEXT(ctx)->decoder,
 329                                                   type,
 330                                                   &dxva_data_ptr, &dxva_size)))
 331             return -1;
 332     }
 333 #endif
 334
 335     dxva_data = dxva_data_ptr;
 336     current = dxva_data;
 337     end = dxva_data + dxva_size;
 338
 339     for (i = 0; i < ctx_pic->slice_count; i++) {
 340         static const uint8_t start_code[] = { 0, 0, 1 };
 341         static const unsigned start_code_size = sizeof(start_code);
 342         unsigned position, size;
 343
 344         assert(offsetof(DXVA_Slice_H264_Short, BSNALunitDataLocation) ==
 345                offsetof(DXVA_Slice_H264_Long,  BSNALunitDataLocation));
 346         assert(offsetof(DXVA_Slice_H264_Short, SliceBytesInBuffer) ==
 347                offsetof(DXVA_Slice_H264_Long,  SliceBytesInBuffer));
 348
 349         if (is_slice_short(avctx, ctx))
 350             slice = &ctx_pic->slice_short[i];
 351         else
 352             slice = (DXVA_Slice_H264_Short*)&ctx_pic->slice_long[i];
 353
 354         position = slice->BSNALunitDataLocation;
 355         size     = slice->SliceBytesInBuffer;
 356         if (start_code_size + size > end - current) {
 357             av_log(avctx, AV_LOG_ERROR, "Failed to build bitstream");
 358             break;
 359         }
 360
 361         slice->BSNALunitDataLocation = current - dxva_data;
 362         slice->SliceBytesInBuffer    = start_code_size + size;
 363
 364         if (!is_slice_short(avctx, ctx)) {
 365             DXVA_Slice_H264_Long *slice_long = (DXVA_Slice_H264_Long*)slice;
 366             if (i < ctx_pic->slice_count - 1)
 367                 slice_long->NumMbsForSlice =
 368                     slice_long[1].first_mb_in_slice - slice_long[0].first_mb_in_slice;
 369             else
 370                 slice_long->NumMbsForSlice = mb_count - slice_long->first_mb_in_slice;
 371         }
 372
 373         memcpy(current, start_code, start_code_size);
 374         current += start_code_size;
 375
 376         memcpy(current, &ctx_pic->bitstream[position], size);
 377         current += size;
 378     }
 379     padding = FFMIN(128 - ((current - dxva_data) & 127), end - current);
 380     if (slice && padding > 0) {
 381         memset(current, 0, padding);
 382         current += padding;
 383
 384         slice->SliceBytesInBuffer += padding;
 385     }
 386 #if CONFIG_D3D11VA
 387     if (ff_dxva2_is_d3d11(avctx))
 388         if (FAILED(ID3D11VideoContext_ReleaseDecoderBuffer(D3D11VA_CONTEXT(ctx)->video_context, D3D11VA_CONTEXT(ctx)->decoder, type)))
 389             return -1;
 390 #endif
 391 #if CONFIG_DXVA2
 392     if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD)
 393         if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(DXVA2_CONTEXT(ctx)->decoder, type)))
 394             return -1;
 395 #endif
 396     if (i < ctx_pic->slice_count)
 397         return -1;
 398
 399 #if CONFIG_D3D11VA
 400     if (ff_dxva2_is_d3d11(avctx)) {
 401         D3D11_VIDEO_DECODER_BUFFER_DESC *dsc11 = bs;
 402         memset(dsc11, 0, sizeof(*dsc11));
 403         dsc11->BufferType           = type;
 404         dsc11->DataSize             = current - dxva_data;
 405         dsc11->NumMBsInBuffer       = mb_count;
 406
 407         type = D3D11_VIDEO_DECODER_BUFFER_SLICE_CONTROL;
 408     }
 409 #endif
 410 #if CONFIG_DXVA2
 411     if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD) {
 412         DXVA2_DecodeBufferDesc *dsc2 = bs;
 413         memset(dsc2, 0, sizeof(*dsc2));
 414         dsc2->CompressedBufferType = type;
 415         dsc2->DataSize             = current - dxva_data;
 416         dsc2->NumMBsInBuffer       = mb_count;
 417
 418         type = DXVA2_SliceControlBufferType;
 419     }
 420 #endif
 421
 422     if (is_slice_short(avctx, ctx)) {
 423         slice_data = ctx_pic->slice_short;
 424         slice_size = ctx_pic->slice_count * sizeof(*ctx_pic->slice_short);
 425     } else {
 426         slice_data = ctx_pic->slice_long;
 427         slice_size = ctx_pic->slice_count * sizeof(*ctx_pic->slice_long);
 428     }
 429     assert((bs->DataSize & 127) == 0);
 430     return ff_dxva2_commit_buffer(avctx, ctx, sc,
 431                                   type,
 432                                   slice_data, slice_size, mb_count);
 433 }
 434
 435
 436 static int dxva2_h264_start_frame(AVCodecContext *avctx,
 437                                   av_unused const uint8_t *buffer,
 438                                   av_unused uint32_t size)
 439 {
 440     const H264Context *h = avctx->priv_data;
 441     AVDXVAContext *ctx = DXVA_CONTEXT(avctx);
 442     struct dxva2_picture_context *ctx_pic = h->cur_pic_ptr->hwaccel_picture_private;
 443
 444     if (!DXVA_CONTEXT_VALID(avctx, ctx))
 445         return -1;
 446     assert(ctx_pic);
 447
 448     /* Fill up DXVA_PicParams_H264 */
 449     fill_picture_parameters(avctx, ctx, h, &ctx_pic->pp);
 450
 451     /* Fill up DXVA_Qmatrix_H264 */
 452     fill_scaling_lists(avctx, ctx, h, &ctx_pic->qm);
 453
 454     ctx_pic->slice_count    = 0;
 455     ctx_pic->bitstream_size = 0;
 456     ctx_pic->bitstream      = NULL;
 457     return 0;
 458 }
 459
 460 static int dxva2_h264_decode_slice(AVCodecContext *avctx,
 461                                    const uint8_t *buffer,
 462                                    uint32_t size)
 463 {
 464     const H264Context *h = avctx->priv_data;
 465     const H264SliceContext *sl = &h->slice_ctx[0];
 466     AVDXVAContext *ctx = DXVA_CONTEXT(avctx);
 467     const H264Picture *current_picture = h->cur_pic_ptr;
 468     struct dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
 469     unsigned position;
 470
 471     if (ctx_pic->slice_count >= MAX_SLICES)
 472         return -1;
 473
 474     if (!ctx_pic->bitstream)
 475         ctx_pic->bitstream = buffer;
 476     ctx_pic->bitstream_size += size;
 477
 478     position = buffer - ctx_pic->bitstream;
 479     if (is_slice_short(avctx, ctx))
 480         fill_slice_short(&ctx_pic->slice_short[ctx_pic->slice_count],
 481                          position, size);
 482     else
 483         fill_slice_long(avctx, &ctx_pic->slice_long[ctx_pic->slice_count],
 484                         &ctx_pic->pp, position, size);
 485     ctx_pic->slice_count++;
 486
 487     if (sl->slice_type != AV_PICTURE_TYPE_I && sl->slice_type != AV_PICTURE_TYPE_SI)
 488         ctx_pic->pp.wBitFields &= ~(1 << 15); /* Set IntraPicFlag to 0 */
 489     return 0;
 490 }
 491
 492 static int dxva2_h264_end_frame(AVCodecContext *avctx)
 493 {
 494     H264Context *h = avctx->priv_data;
 495     H264SliceContext *sl = &h->slice_ctx[0];
 496     struct dxva2_picture_context *ctx_pic =
 497         h->cur_pic_ptr->hwaccel_picture_private;
 498     int ret;
 499
 500     if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0)
 501         return -1;
 502     ret = ff_dxva2_common_end_frame(avctx, h->cur_pic_ptr->f,
 503                                     &ctx_pic->pp, sizeof(ctx_pic->pp),
 504                                     &ctx_pic->qm, sizeof(ctx_pic->qm),
 505                                     commit_bitstream_and_slice_buffer);
 506     if (!ret)
 507         ff_h264_draw_horiz_band(h, sl, 0, h->avctx->height);
 508     return ret;
 509 }
 510
 511 #if CONFIG_H264_DXVA2_HWACCEL
 512 const AVHWAccel ff_h264_dxva2_hwaccel = {
 513     .name           = "h264_dxva2",
 514     .type           = AVMEDIA_TYPE_VIDEO,
 515     .id             = AV_CODEC_ID_H264,
 516     .pix_fmt        = AV_PIX_FMT_DXVA2_VLD,
 517     .init           = ff_dxva2_decode_init,
 518     .uninit         = ff_dxva2_decode_uninit,
 519     .start_frame    = dxva2_h264_start_frame,
 520     .decode_slice   = dxva2_h264_decode_slice,
 521     .end_frame      = dxva2_h264_end_frame,
 522     .frame_params   = ff_dxva2_common_frame_params,
 523     .frame_priv_data_size = sizeof(struct dxva2_picture_context),
 524     .priv_data_size = sizeof(FFDXVASharedContext),
 525 };
 526 #endif
 527
 528 #if CONFIG_H264_D3D11VA_HWACCEL
 529 const AVHWAccel ff_h264_d3d11va_hwaccel = {
 530     .name           = "h264_d3d11va",
 531     .type           = AVMEDIA_TYPE_VIDEO,
 532     .id             = AV_CODEC_ID_H264,
 533     .pix_fmt        = AV_PIX_FMT_D3D11VA_VLD,
 534     .init           = ff_dxva2_decode_init,
 535     .uninit         = ff_dxva2_decode_uninit,
 536     .start_frame    = dxva2_h264_start_frame,
 537     .decode_slice   = dxva2_h264_decode_slice,
 538     .end_frame      = dxva2_h264_end_frame,
 539     .frame_params   = ff_dxva2_common_frame_params,
 540     .frame_priv_data_size = sizeof(struct dxva2_picture_context),
 541     .priv_data_size = sizeof(FFDXVASharedContext),
 542 };
 543 #endif
 544
 545 #if CONFIG_H264_D3D11VA2_HWACCEL
 546 const AVHWAccel ff_h264_d3d11va2_hwaccel = {
 547     .name           = "h264_d3d11va2",
 548     .type           = AVMEDIA_TYPE_VIDEO,
 549     .id             = AV_CODEC_ID_H264,
 550     .pix_fmt        = AV_PIX_FMT_D3D11,
 551     .init           = ff_dxva2_decode_init,
 552     .uninit         = ff_dxva2_decode_uninit,
 553     .start_frame    = dxva2_h264_start_frame,
 554     .decode_slice   = dxva2_h264_decode_slice,
 555     .end_frame      = dxva2_h264_end_frame,
 556     .frame_params   = ff_dxva2_common_frame_params,
 557     .frame_priv_data_size = sizeof(struct dxva2_picture_context),
 558     .priv_data_size = sizeof(FFDXVASharedContext),
 559 };
 560 #endif