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   1 /*
   2  * DXVA2 HEVC HW acceleration.
   3  *
   4  * copyright (c) 2014 - 2015 Hendrik Leppkes
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg 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  * FFmpeg 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 FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 #include "libavutil/avassert.h"
  24
  25 #include "hevc.h"
  26
  27 // The headers above may include w32threads.h, which uses the original
  28 // _WIN32_WINNT define, while dxva2_internal.h redefines it to target a
  29 // potentially newer version.
  30 #include "dxva2_internal.h"
  31
  32 #define MAX_SLICES 256
  33
  34 struct hevc_dxva2_picture_context {
  35     DXVA_PicParams_HEVC   pp;
  36     DXVA_Qmatrix_HEVC     qm;
  37     unsigned              slice_count;
  38     DXVA_Slice_HEVC_Short slice_short[MAX_SLICES];
  39     const uint8_t         *bitstream;
  40     unsigned              bitstream_size;
  41 };
  42
  43 static void fill_picture_entry(DXVA_PicEntry_HEVC *pic,
  44                                unsigned index, unsigned flag)
  45 {
  46     av_assert0((index & 0x7f) == index && (flag & 0x01) == flag);
  47     pic->bPicEntry = index | (flag << 7);
  48 }
  49
  50 static int get_refpic_index(const DXVA_PicParams_HEVC *pp, int surface_index)
  51 {
  52     int i;
  53     for (i = 0; i < FF_ARRAY_ELEMS(pp->RefPicList); i++) {
  54         if ((pp->RefPicList[i].bPicEntry & 0x7f) == surface_index)
  55           return i;
  56     }
  57     return 0xff;
  58 }
  59
  60 static void fill_picture_parameters(const AVCodecContext *avctx, AVDXVAContext *ctx, const HEVCContext *h,
  61                                     DXVA_PicParams_HEVC *pp)
  62 {
  63     const HEVCFrame *current_picture = h->ref;
  64     const HEVCSPS *sps = h->ps.sps;
  65     const HEVCPPS *pps = h->ps.pps;
  66     int i, j;
  67
  68     memset(pp, 0, sizeof(*pp));
  69
  70     pp->PicWidthInMinCbsY  = sps->min_cb_width;
  71     pp->PicHeightInMinCbsY = sps->min_cb_height;
  72
  73     pp->wFormatAndSequenceInfoFlags = (sps->chroma_format_idc             <<  0) |
  74                                       (sps->separate_colour_plane_flag    <<  2) |
  75                                       ((sps->bit_depth - 8)               <<  3) |
  76                                       ((sps->bit_depth - 8)               <<  6) |
  77                                       ((sps->log2_max_poc_lsb - 4)        <<  9) |
  78                                       (0                                  << 13) |
  79                                       (0                                  << 14) |
  80                                       (0                                  << 15);
  81
  82     fill_picture_entry(&pp->CurrPic, ff_dxva2_get_surface_index(avctx, ctx, current_picture->frame), 0);
  83
  84     pp->sps_max_dec_pic_buffering_minus1         = sps->temporal_layer[sps->max_sub_layers - 1].max_dec_pic_buffering - 1;
  85     pp->log2_min_luma_coding_block_size_minus3   = sps->log2_min_cb_size - 3;
  86     pp->log2_diff_max_min_luma_coding_block_size = sps->log2_diff_max_min_coding_block_size;
  87     pp->log2_min_transform_block_size_minus2     = sps->log2_min_tb_size - 2;
  88     pp->log2_diff_max_min_transform_block_size   = sps->log2_max_trafo_size  - sps->log2_min_tb_size;
  89     pp->max_transform_hierarchy_depth_inter      = sps->max_transform_hierarchy_depth_inter;
  90     pp->max_transform_hierarchy_depth_intra      = sps->max_transform_hierarchy_depth_intra;
  91     pp->num_short_term_ref_pic_sets              = sps->nb_st_rps;
  92     pp->num_long_term_ref_pics_sps               = sps->num_long_term_ref_pics_sps;
  93
  94     pp->num_ref_idx_l0_default_active_minus1     = pps->num_ref_idx_l0_default_active - 1;
  95     pp->num_ref_idx_l1_default_active_minus1     = pps->num_ref_idx_l1_default_active - 1;
  96     pp->init_qp_minus26                          = pps->pic_init_qp_minus26;
  97
  98     if (h->sh.short_term_ref_pic_set_sps_flag == 0 && h->sh.short_term_rps) {
  99         pp->ucNumDeltaPocsOfRefRpsIdx            = h->sh.short_term_rps->rps_idx_num_delta_pocs;
 100         pp->wNumBitsForShortTermRPSInSlice       = h->sh.short_term_ref_pic_set_size;
 101     }
 102
 103     pp->dwCodingParamToolFlags = (sps->scaling_list_enable_flag                  <<  0) |
 104                                  (sps->amp_enabled_flag                          <<  1) |
 105                                  (sps->sao_enabled                               <<  2) |
 106                                  (sps->pcm_enabled_flag                          <<  3) |
 107                                  ((sps->pcm_enabled_flag ? (sps->pcm.bit_depth - 1) : 0)            <<  4) |
 108                                  ((sps->pcm_enabled_flag ? (sps->pcm.bit_depth_chroma - 1) : 0)     <<  8) |
 109                                  ((sps->pcm_enabled_flag ? (sps->pcm.log2_min_pcm_cb_size - 3) : 0) << 12) |
 110                                  ((sps->pcm_enabled_flag ? (sps->pcm.log2_max_pcm_cb_size - sps->pcm.log2_min_pcm_cb_size) : 0) << 14) |
 111                                  (sps->pcm.loop_filter_disable_flag              << 16) |
 112                                  (sps->long_term_ref_pics_present_flag           << 17) |
 113                                  (sps->sps_temporal_mvp_enabled_flag             << 18) |
 114                                  (sps->sps_strong_intra_smoothing_enable_flag    << 19) |
 115                                  (pps->dependent_slice_segments_enabled_flag     << 20) |
 116                                  (pps->output_flag_present_flag                  << 21) |
 117                                  (pps->num_extra_slice_header_bits               << 22) |
 118                                  (pps->sign_data_hiding_flag                     << 25) |
 119                                  (pps->cabac_init_present_flag                   << 26) |
 120                                  (0                                              << 27);
 121
 122     pp->dwCodingSettingPicturePropertyFlags = (pps->constrained_intra_pred_flag                   <<  0) |
 123                                               (pps->transform_skip_enabled_flag                   <<  1) |
 124                                               (pps->cu_qp_delta_enabled_flag                      <<  2) |
 125                                               (pps->pic_slice_level_chroma_qp_offsets_present_flag <<  3) |
 126                                               (pps->weighted_pred_flag                            <<  4) |
 127                                               (pps->weighted_bipred_flag                          <<  5) |
 128                                               (pps->transquant_bypass_enable_flag                 <<  6) |
 129                                               (pps->tiles_enabled_flag                            <<  7) |
 130                                               (pps->entropy_coding_sync_enabled_flag              <<  8) |
 131                                               (pps->uniform_spacing_flag                          <<  9) |
 132                                               ((pps->tiles_enabled_flag ? pps->loop_filter_across_tiles_enabled_flag : 0) << 10) |
 133                                               (pps->seq_loop_filter_across_slices_enabled_flag    << 11) |
 134                                               (pps->deblocking_filter_override_enabled_flag       << 12) |
 135                                               (pps->disable_dbf                                   << 13) |
 136                                               (pps->lists_modification_present_flag               << 14) |
 137                                               (pps->slice_header_extension_present_flag           << 15) |
 138                                               (IS_IRAP(h)                                         << 16) |
 139                                               (IS_IDR(h)                                          << 17) |
 140                                               /* IntraPicFlag */
 141                                               (IS_IRAP(h)                                         << 18) |
 142                                               (0                                                  << 19);
 143     pp->pps_cb_qp_offset            = pps->cb_qp_offset;
 144     pp->pps_cr_qp_offset            = pps->cr_qp_offset;
 145     if (pps->tiles_enabled_flag) {
 146         pp->num_tile_columns_minus1 = pps->num_tile_columns - 1;
 147         pp->num_tile_rows_minus1    = pps->num_tile_rows - 1;
 148
 149         if (!pps->uniform_spacing_flag) {
 150             for (i = 0; i < pps->num_tile_columns; i++)
 151                 pp->column_width_minus1[i] = pps->column_width[i] - 1;
 152
 153             for (i = 0; i < pps->num_tile_rows; i++)
 154                 pp->row_height_minus1[i] = pps->row_height[i] - 1;
 155         }
 156     }
 157
 158     pp->diff_cu_qp_delta_depth           = pps->diff_cu_qp_delta_depth;
 159     pp->pps_beta_offset_div2             = pps->beta_offset / 2;
 160     pp->pps_tc_offset_div2               = pps->tc_offset / 2;
 161     pp->log2_parallel_merge_level_minus2 = pps->log2_parallel_merge_level - 2;
 162     pp->CurrPicOrderCntVal               = h->poc;
 163
 164     // fill RefPicList from the DPB
 165     for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->RefPicList); i++) {
 166         const HEVCFrame *frame = NULL;
 167         while (!frame && j < FF_ARRAY_ELEMS(h->DPB)) {
 168             if (&h->DPB[j] != current_picture && (h->DPB[j].flags & (HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF)))
 169                 frame = &h->DPB[j];
 170             j++;
 171         }
 172
 173         if (frame) {
 174             fill_picture_entry(&pp->RefPicList[i], ff_dxva2_get_surface_index(avctx, ctx, frame->frame), !!(frame->flags & HEVC_FRAME_FLAG_LONG_REF));
 175             pp->PicOrderCntValList[i] = frame->poc;
 176         } else {
 177             pp->RefPicList[i].bPicEntry = 0xff;
 178             pp->PicOrderCntValList[i]   = 0;
 179         }
 180     }
 181
 182     #define DO_REF_LIST(ref_idx, ref_list) { \
 183         const RefPicList *rpl = &h->rps[ref_idx]; \
 184         for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->ref_list); i++) { \
 185             const HEVCFrame *frame = NULL; \
 186             while (!frame && j < rpl->nb_refs) \
 187                 frame = rpl->ref[j++]; \
 188             if (frame) \
 189                 pp->ref_list[i] = get_refpic_index(pp, ff_dxva2_get_surface_index(avctx, ctx, frame->frame)); \
 190             else \
 191                 pp->ref_list[i] = 0xff; \
 192         } \
 193     }
 194
 195     // Fill short term and long term lists
 196     DO_REF_LIST(ST_CURR_BEF, RefPicSetStCurrBefore);
 197     DO_REF_LIST(ST_CURR_AFT, RefPicSetStCurrAfter);
 198     DO_REF_LIST(LT_CURR, RefPicSetLtCurr);
 199
 200     pp->StatusReportFeedbackNumber = 1 + DXVA_CONTEXT_REPORT_ID(avctx, ctx)++;
 201 }
 202
 203 static void fill_scaling_lists(AVDXVAContext *ctx, const HEVCContext *h, DXVA_Qmatrix_HEVC *qm)
 204 {
 205     unsigned i, j, pos;
 206     const ScalingList *sl = h->ps.pps->scaling_list_data_present_flag ?
 207                             &h->ps.pps->scaling_list : &h->ps.sps->scaling_list;
 208
 209     memset(qm, 0, sizeof(*qm));
 210     for (i = 0; i < 6; i++) {
 211         for (j = 0; j < 16; j++) {
 212             pos = 4 * ff_hevc_diag_scan4x4_y[j] + ff_hevc_diag_scan4x4_x[j];
 213             qm->ucScalingLists0[i][j] = sl->sl[0][i][pos];
 214         }
 215
 216         for (j = 0; j < 64; j++) {
 217             pos = 8 * ff_hevc_diag_scan8x8_y[j] + ff_hevc_diag_scan8x8_x[j];
 218             qm->ucScalingLists1[i][j] = sl->sl[1][i][pos];
 219             qm->ucScalingLists2[i][j] = sl->sl[2][i][pos];
 220
 221             if (i < 2)
 222                 qm->ucScalingLists3[i][j] = sl->sl[3][i * 3][pos];
 223         }
 224
 225         qm->ucScalingListDCCoefSizeID2[i] = sl->sl_dc[0][i];
 226         if (i < 2)
 227             qm->ucScalingListDCCoefSizeID3[i] = sl->sl_dc[1][i * 3];
 228     }
 229 }
 230
 231 static void fill_slice_short(DXVA_Slice_HEVC_Short *slice,
 232                              unsigned position, unsigned size)
 233 {
 234     memset(slice, 0, sizeof(*slice));
 235     slice->BSNALunitDataLocation = position;
 236     slice->SliceBytesInBuffer    = size;
 237     slice->wBadSliceChopping     = 0;
 238 }
 239
 240 static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
 241                                              DECODER_BUFFER_DESC *bs,
 242                                              DECODER_BUFFER_DESC *sc)
 243 {
 244     const HEVCContext *h = avctx->priv_data;
 245     AVDXVAContext *ctx = avctx->hwaccel_context;
 246     const HEVCFrame *current_picture = h->ref;
 247     struct hevc_dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
 248     DXVA_Slice_HEVC_Short *slice = NULL;
 249     void     *dxva_data_ptr;
 250     uint8_t  *dxva_data, *current, *end;
 251     unsigned dxva_size;
 252     void     *slice_data;
 253     unsigned slice_size;
 254     unsigned padding;
 255     unsigned i;
 256     unsigned type;
 257
 258     /* Create an annex B bitstream buffer with only slice NAL and finalize slice */
 259 #if CONFIG_D3D11VA
 260     if (avctx->pix_fmt == AV_PIX_FMT_D3D11VA_VLD) {
 261         type = D3D11_VIDEO_DECODER_BUFFER_BITSTREAM;
 262         if (FAILED(ID3D11VideoContext_GetDecoderBuffer(D3D11VA_CONTEXT(ctx)->video_context,
 263                                                        D3D11VA_CONTEXT(ctx)->decoder,
 264                                                        type,
 265                                                        &dxva_size, &dxva_data_ptr)))
 266             return -1;
 267     }
 268 #endif
 269 #if CONFIG_DXVA2
 270     if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD) {
 271         type = DXVA2_BitStreamDateBufferType;
 272         if (FAILED(IDirectXVideoDecoder_GetBuffer(DXVA2_CONTEXT(ctx)->decoder,
 273                                                   type,
 274                                                   &dxva_data_ptr, &dxva_size)))
 275             return -1;
 276     }
 277 #endif
 278
 279     dxva_data = dxva_data_ptr;
 280     current = dxva_data;
 281     end = dxva_data + dxva_size;
 282
 283     for (i = 0; i < ctx_pic->slice_count; i++) {
 284         static const uint8_t start_code[] = { 0, 0, 1 };
 285         static const unsigned start_code_size = sizeof(start_code);
 286         unsigned position, size;
 287
 288         slice = &ctx_pic->slice_short[i];
 289
 290         position = slice->BSNALunitDataLocation;
 291         size     = slice->SliceBytesInBuffer;
 292         if (start_code_size + size > end - current) {
 293             av_log(avctx, AV_LOG_ERROR, "Failed to build bitstream");
 294             break;
 295         }
 296
 297         slice->BSNALunitDataLocation = current - dxva_data;
 298         slice->SliceBytesInBuffer    = start_code_size + size;
 299
 300         memcpy(current, start_code, start_code_size);
 301         current += start_code_size;
 302
 303         memcpy(current, &ctx_pic->bitstream[position], size);
 304         current += size;
 305     }
 306     padding = FFMIN(128 - ((current - dxva_data) & 127), end - current);
 307     if (slice && padding > 0) {
 308         memset(current, 0, padding);
 309         current += padding;
 310
 311         slice->SliceBytesInBuffer += padding;
 312     }
 313 #if CONFIG_D3D11VA
 314     if (avctx->pix_fmt == AV_PIX_FMT_D3D11VA_VLD)
 315         if (FAILED(ID3D11VideoContext_ReleaseDecoderBuffer(D3D11VA_CONTEXT(ctx)->video_context, D3D11VA_CONTEXT(ctx)->decoder, type)))
 316             return -1;
 317 #endif
 318 #if CONFIG_DXVA2
 319     if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD)
 320         if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(DXVA2_CONTEXT(ctx)->decoder, type)))
 321             return -1;
 322 #endif
 323     if (i < ctx_pic->slice_count)
 324         return -1;
 325
 326 #if CONFIG_D3D11VA
 327     if (avctx->pix_fmt == AV_PIX_FMT_D3D11VA_VLD) {
 328         D3D11_VIDEO_DECODER_BUFFER_DESC *dsc11 = bs;
 329         memset(dsc11, 0, sizeof(*dsc11));
 330         dsc11->BufferType           = type;
 331         dsc11->DataSize             = current - dxva_data;
 332         dsc11->NumMBsInBuffer       = 0;
 333
 334         type = D3D11_VIDEO_DECODER_BUFFER_SLICE_CONTROL;
 335     }
 336 #endif
 337 #if CONFIG_DXVA2
 338     if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD) {
 339         DXVA2_DecodeBufferDesc *dsc2 = bs;
 340         memset(dsc2, 0, sizeof(*dsc2));
 341         dsc2->CompressedBufferType = type;
 342         dsc2->DataSize             = current - dxva_data;
 343         dsc2->NumMBsInBuffer       = 0;
 344
 345         type = DXVA2_SliceControlBufferType;
 346     }
 347 #endif
 348
 349     slice_data = ctx_pic->slice_short;
 350     slice_size = ctx_pic->slice_count * sizeof(*ctx_pic->slice_short);
 351
 352     av_assert0(((current - dxva_data) & 127) == 0);
 353     return ff_dxva2_commit_buffer(avctx, ctx, sc,
 354                                   type,
 355                                   slice_data, slice_size, 0);
 356 }
 357
 358
 359 static int dxva2_hevc_start_frame(AVCodecContext *avctx,
 360                                   av_unused const uint8_t *buffer,
 361                                   av_unused uint32_t size)
 362 {
 363     const HEVCContext *h = avctx->priv_data;
 364     AVDXVAContext *ctx = avctx->hwaccel_context;
 365     struct hevc_dxva2_picture_context *ctx_pic = h->ref->hwaccel_picture_private;
 366
 367     if (!DXVA_CONTEXT_VALID(avctx, ctx))
 368         return -1;
 369     av_assert0(ctx_pic);
 370
 371     /* Fill up DXVA_PicParams_HEVC */
 372     fill_picture_parameters(avctx, ctx, h, &ctx_pic->pp);
 373
 374     /* Fill up DXVA_Qmatrix_HEVC */
 375     fill_scaling_lists(ctx, h, &ctx_pic->qm);
 376
 377     ctx_pic->slice_count    = 0;
 378     ctx_pic->bitstream_size = 0;
 379     ctx_pic->bitstream      = NULL;
 380     return 0;
 381 }
 382
 383 static int dxva2_hevc_decode_slice(AVCodecContext *avctx,
 384                                    const uint8_t *buffer,
 385                                    uint32_t size)
 386 {
 387     const HEVCContext *h = avctx->priv_data;
 388     const HEVCFrame *current_picture = h->ref;
 389     struct hevc_dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
 390     unsigned position;
 391
 392     if (ctx_pic->slice_count >= MAX_SLICES)
 393         return -1;
 394
 395     if (!ctx_pic->bitstream)
 396         ctx_pic->bitstream = buffer;
 397     ctx_pic->bitstream_size += size;
 398
 399     position = buffer - ctx_pic->bitstream;
 400     fill_slice_short(&ctx_pic->slice_short[ctx_pic->slice_count], position, size);
 401     ctx_pic->slice_count++;
 402
 403     return 0;
 404 }
 405
 406 static int dxva2_hevc_end_frame(AVCodecContext *avctx)
 407 {
 408     HEVCContext *h = avctx->priv_data;
 409     struct hevc_dxva2_picture_context *ctx_pic = h->ref->hwaccel_picture_private;
 410     int scale = ctx_pic->pp.dwCodingParamToolFlags & 1;
 411     int ret;
 412
 413     if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0)
 414         return -1;
 415
 416     ret = ff_dxva2_common_end_frame(avctx, h->ref->frame,
 417                                     &ctx_pic->pp, sizeof(ctx_pic->pp),
 418                                     scale ? &ctx_pic->qm : NULL, scale ? sizeof(ctx_pic->qm) : 0,
 419                                     commit_bitstream_and_slice_buffer);
 420     return ret;
 421 }
 422
 423 #if CONFIG_HEVC_DXVA2_HWACCEL
 424 AVHWAccel ff_hevc_dxva2_hwaccel = {
 425     .name           = "hevc_dxva2",
 426     .type           = AVMEDIA_TYPE_VIDEO,
 427     .id             = AV_CODEC_ID_HEVC,
 428     .pix_fmt        = AV_PIX_FMT_DXVA2_VLD,
 429     .start_frame    = dxva2_hevc_start_frame,
 430     .decode_slice   = dxva2_hevc_decode_slice,
 431     .end_frame      = dxva2_hevc_end_frame,
 432     .frame_priv_data_size = sizeof(struct hevc_dxva2_picture_context),
 433 };
 434 #endif
 435
 436 #if CONFIG_HEVC_D3D11VA_HWACCEL
 437 AVHWAccel ff_hevc_d3d11va_hwaccel = {
 438     .name           = "hevc_d3d11va",
 439     .type           = AVMEDIA_TYPE_VIDEO,
 440     .id             = AV_CODEC_ID_HEVC,
 441     .pix_fmt        = AV_PIX_FMT_D3D11VA_VLD,
 442     .start_frame    = dxva2_hevc_start_frame,
 443     .decode_slice   = dxva2_hevc_decode_slice,
 444     .end_frame      = dxva2_hevc_end_frame,
 445     .frame_priv_data_size = sizeof(struct hevc_dxva2_picture_context),
 446 };
 447 #endif