libavcodec/dxva2_hevc.c

   1 /*
   2  * DXVA2 HEVC HW acceleration.
   3  *
   4  * copyright (c) 2014 - 2015 Hendrik Leppkes
   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 "libavutil/avassert.h"
  24
  25 #include "hevc_data.h"
  26 #include "hevcdec.h"
  27
  28 // The headers above may include w32threads.h, which uses the original
  29 // _WIN32_WINNT define, while dxva2_internal.h redefines it to target a
  30 // potentially newer version.
  31 #include "dxva2_internal.h"
  32
  33 #define MAX_SLICES 256
  34
  35 struct hevc_dxva2_picture_context {
  36     DXVA_PicParams_HEVC   pp;
  37     DXVA_Qmatrix_HEVC     qm;
  38     unsigned              slice_count;
  39     DXVA_Slice_HEVC_Short slice_short[MAX_SLICES];
  40     const uint8_t         *bitstream;
  41     unsigned              bitstream_size;
  42 };
  43
  44 static void fill_picture_entry(DXVA_PicEntry_HEVC *pic,
  45                                unsigned index, unsigned flag)
  46 {
  47     av_assert0((index & 0x7f) == index && (flag & 0x01) == flag);
  48     pic->bPicEntry = index | (flag << 7);
  49 }
  50
  51 static int get_refpic_index(const DXVA_PicParams_HEVC *pp, int surface_index)
  52 {
  53     int i;
  54     for (i = 0; i < FF_ARRAY_ELEMS(pp->RefPicList); i++) {
  55         if ((pp->RefPicList[i].bPicEntry & 0x7f) == surface_index)
  56           return i;
  57     }
  58     return 0xff;
  59 }
  60
  61 static void fill_picture_parameters(const AVCodecContext *avctx, AVDXVAContext *ctx, const HEVCContext *h,
  62                                     DXVA_PicParams_HEVC *pp)
  63 {
  64     const HEVCFrame *current_picture = h->ref;
  65     const HEVCSPS *sps = h->ps.sps;
  66     const HEVCPPS *pps = h->ps.pps;
  67     int i, j;
  68
  69     memset(pp, 0, sizeof(*pp));
  70
  71     pp->PicWidthInMinCbsY  = sps->min_cb_width;
  72     pp->PicHeightInMinCbsY = sps->min_cb_height;
  73
  74     pp->wFormatAndSequenceInfoFlags = (sps->chroma_format_idc             <<  0) |
  75                                       (sps->separate_colour_plane_flag    <<  2) |
  76                                       ((sps->bit_depth - 8)               <<  3) |
  77                                       ((sps->bit_depth - 8)               <<  6) |
  78                                       ((sps->log2_max_poc_lsb - 4)        <<  9) |
  79                                       (0                                  << 13) |
  80                                       (0                                  << 14) |
  81                                       (0                                  << 15);
  82
  83     fill_picture_entry(&pp->CurrPic, ff_dxva2_get_surface_index(avctx, ctx, current_picture->frame), 0);
  84
  85     pp->sps_max_dec_pic_buffering_minus1         = sps->temporal_layer[sps->max_sub_layers - 1].max_dec_pic_buffering - 1;
  86     pp->log2_min_luma_coding_block_size_minus3   = sps->log2_min_cb_size - 3;
  87     pp->log2_diff_max_min_luma_coding_block_size = sps->log2_diff_max_min_coding_block_size;
  88     pp->log2_min_transform_block_size_minus2     = sps->log2_min_tb_size - 2;
  89     pp->log2_diff_max_min_transform_block_size   = sps->log2_max_trafo_size  - sps->log2_min_tb_size;
  90     pp->max_transform_hierarchy_depth_inter      = sps->max_transform_hierarchy_depth_inter;
  91     pp->max_transform_hierarchy_depth_intra      = sps->max_transform_hierarchy_depth_intra;
  92     pp->num_short_term_ref_pic_sets              = sps->nb_st_rps;
  93     pp->num_long_term_ref_pics_sps               = sps->num_long_term_ref_pics_sps;
  94
  95     pp->num_ref_idx_l0_default_active_minus1     = pps->num_ref_idx_l0_default_active - 1;
  96     pp->num_ref_idx_l1_default_active_minus1     = pps->num_ref_idx_l1_default_active - 1;
  97     pp->init_qp_minus26                          = pps->pic_init_qp_minus26;
  98
  99     if (h->sh.short_term_ref_pic_set_sps_flag == 0 && h->sh.short_term_rps) {
 100         pp->ucNumDeltaPocsOfRefRpsIdx            = h->sh.short_term_rps->rps_idx_num_delta_pocs;
 101         pp->wNumBitsForShortTermRPSInSlice       = h->sh.short_term_ref_pic_set_size;
 102     }
 103
 104     pp->dwCodingParamToolFlags = (sps->scaling_list_enable_flag                  <<  0) |
 105                                  (sps->amp_enabled_flag                          <<  1) |
 106                                  (sps->sao_enabled                               <<  2) |
 107                                  (sps->pcm_enabled_flag                          <<  3) |
 108                                  ((sps->pcm_enabled_flag ? (sps->pcm.bit_depth - 1) : 0)            <<  4) |
 109                                  ((sps->pcm_enabled_flag ? (sps->pcm.bit_depth_chroma - 1) : 0)     <<  8) |
 110                                  ((sps->pcm_enabled_flag ? (sps->pcm.log2_min_pcm_cb_size - 3) : 0) << 12) |
 111                                  ((sps->pcm_enabled_flag ? (sps->pcm.log2_max_pcm_cb_size - sps->pcm.log2_min_pcm_cb_size) : 0) << 14) |
 112                                  (sps->pcm.loop_filter_disable_flag              << 16) |
 113                                  (sps->long_term_ref_pics_present_flag           << 17) |
 114                                  (sps->sps_temporal_mvp_enabled_flag             << 18) |
 115                                  (sps->sps_strong_intra_smoothing_enable_flag    << 19) |
 116                                  (pps->dependent_slice_segments_enabled_flag     << 20) |
 117                                  (pps->output_flag_present_flag                  << 21) |
 118                                  (pps->num_extra_slice_header_bits               << 22) |
 119                                  (pps->sign_data_hiding_flag                     << 25) |
 120                                  (pps->cabac_init_present_flag                   << 26) |
 121                                  (0                                              << 27);
 122
 123     pp->dwCodingSettingPicturePropertyFlags = (pps->constrained_intra_pred_flag                   <<  0) |
 124                                               (pps->transform_skip_enabled_flag                   <<  1) |
 125                                               (pps->cu_qp_delta_enabled_flag                      <<  2) |
 126                                               (pps->pic_slice_level_chroma_qp_offsets_present_flag <<  3) |
 127                                               (pps->weighted_pred_flag                            <<  4) |
 128                                               (pps->weighted_bipred_flag                          <<  5) |
 129                                               (pps->transquant_bypass_enable_flag                 <<  6) |
 130                                               (pps->tiles_enabled_flag                            <<  7) |
 131                                               (pps->entropy_coding_sync_enabled_flag              <<  8) |
 132                                               (pps->uniform_spacing_flag                          <<  9) |
 133                                               ((pps->tiles_enabled_flag ? pps->loop_filter_across_tiles_enabled_flag : 0) << 10) |
 134                                               (pps->seq_loop_filter_across_slices_enabled_flag    << 11) |
 135                                               (pps->deblocking_filter_override_enabled_flag       << 12) |
 136                                               (pps->disable_dbf                                   << 13) |
 137                                               (pps->lists_modification_present_flag               << 14) |
 138                                               (pps->slice_header_extension_present_flag           << 15) |
 139                                               (IS_IRAP(h)                                         << 16) |
 140                                               (IS_IDR(h)                                          << 17) |
 141                                               /* IntraPicFlag */
 142                                               (IS_IRAP(h)                                         << 18) |
 143                                               (0                                                  << 19);
 144     pp->pps_cb_qp_offset            = pps->cb_qp_offset;
 145     pp->pps_cr_qp_offset            = pps->cr_qp_offset;
 146     if (pps->tiles_enabled_flag) {
 147         pp->num_tile_columns_minus1 = pps->num_tile_columns - 1;
 148         pp->num_tile_rows_minus1    = pps->num_tile_rows - 1;
 149
 150         if (!pps->uniform_spacing_flag) {
 151             for (i = 0; i < pps->num_tile_columns; i++)
 152                 pp->column_width_minus1[i] = pps->column_width[i] - 1;
 153
 154             for (i = 0; i < pps->num_tile_rows; i++)
 155                 pp->row_height_minus1[i] = pps->row_height[i] - 1;
 156         }
 157     }
 158
 159     pp->diff_cu_qp_delta_depth           = pps->diff_cu_qp_delta_depth;
 160     pp->pps_beta_offset_div2             = pps->beta_offset / 2;
 161     pp->pps_tc_offset_div2               = pps->tc_offset / 2;
 162     pp->log2_parallel_merge_level_minus2 = pps->log2_parallel_merge_level - 2;
 163     pp->CurrPicOrderCntVal               = h->poc;
 164
 165     // fill RefPicList from the DPB
 166     for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->RefPicList); i++) {
 167         const HEVCFrame *frame = NULL;
 168         while (!frame && j < FF_ARRAY_ELEMS(h->DPB)) {
 169             if (&h->DPB[j] != current_picture && (h->DPB[j].flags & (HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF)))
 170                 frame = &h->DPB[j];
 171             j++;
 172         }
 173
 174         if (frame) {
 175             fill_picture_entry(&pp->RefPicList[i], ff_dxva2_get_surface_index(avctx, ctx, frame->frame), !!(frame->flags & HEVC_FRAME_FLAG_LONG_REF));
 176             pp->PicOrderCntValList[i] = frame->poc;
 177         } else {
 178             pp->RefPicList[i].bPicEntry = 0xff;
 179             pp->PicOrderCntValList[i]   = 0;
 180         }
 181     }
 182
 183     #define DO_REF_LIST(ref_idx, ref_list) { \
 184         const RefPicList *rpl = &h->rps[ref_idx]; \
 185         for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->ref_list); i++) { \
 186             const HEVCFrame *frame = NULL; \
 187             while (!frame && j < rpl->nb_refs) \
 188                 frame = rpl->ref[j++]; \
 189             if (frame) \
 190                 pp->ref_list[i] = get_refpic_index(pp, ff_dxva2_get_surface_index(avctx, ctx, frame->frame)); \
 191             else \
 192                 pp->ref_list[i] = 0xff; \
 193         } \
 194     }
 195
 196     // Fill short term and long term lists
 197     DO_REF_LIST(ST_CURR_BEF, RefPicSetStCurrBefore);
 198     DO_REF_LIST(ST_CURR_AFT, RefPicSetStCurrAfter);
 199     DO_REF_LIST(LT_CURR, RefPicSetLtCurr);
 200
 201     pp->StatusReportFeedbackNumber = 1 + DXVA_CONTEXT_REPORT_ID(avctx, ctx)++;
 202 }
 203
 204 static void fill_scaling_lists(AVDXVAContext *ctx, const HEVCContext *h, DXVA_Qmatrix_HEVC *qm)
 205 {
 206     unsigned i, j, pos;
 207     const ScalingList *sl = h->ps.pps->scaling_list_data_present_flag ?
 208                             &h->ps.pps->scaling_list : &h->ps.sps->scaling_list;
 209
 210     memset(qm, 0, sizeof(*qm));
 211     for (i = 0; i < 6; i++) {
 212         for (j = 0; j < 16; j++) {
 213             pos = 4 * ff_hevc_diag_scan4x4_y[j] + ff_hevc_diag_scan4x4_x[j];
 214             qm->ucScalingLists0[i][j] = sl->sl[0][i][pos];
 215         }
 216
 217         for (j = 0; j < 64; j++) {
 218             pos = 8 * ff_hevc_diag_scan8x8_y[j] + ff_hevc_diag_scan8x8_x[j];
 219             qm->ucScalingLists1[i][j] = sl->sl[1][i][pos];
 220             qm->ucScalingLists2[i][j] = sl->sl[2][i][pos];
 221
 222             if (i < 2)
 223                 qm->ucScalingLists3[i][j] = sl->sl[3][i * 3][pos];
 224         }
 225
 226         qm->ucScalingListDCCoefSizeID2[i] = sl->sl_dc[0][i];
 227         if (i < 2)
 228             qm->ucScalingListDCCoefSizeID3[i] = sl->sl_dc[1][i * 3];
 229     }
 230 }
 231
 232 static void fill_slice_short(DXVA_Slice_HEVC_Short *slice,
 233                              unsigned position, unsigned size)
 234 {
 235     memset(slice, 0, sizeof(*slice));
 236     slice->BSNALunitDataLocation = position;
 237     slice->SliceBytesInBuffer    = size;
 238     slice->wBadSliceChopping     = 0;
 239 }
 240
 241 static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
 242                                              DECODER_BUFFER_DESC *bs,
 243                                              DECODER_BUFFER_DESC *sc)
 244 {
 245     const HEVCContext *h = avctx->priv_data;
 246     AVDXVAContext *ctx = DXVA_CONTEXT(avctx);
 247     const HEVCFrame *current_picture = h->ref;
 248     struct hevc_dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
 249     DXVA_Slice_HEVC_Short *slice = NULL;
 250     void     *dxva_data_ptr;
 251     uint8_t  *dxva_data, *current, *end;
 252     unsigned dxva_size;
 253     void     *slice_data;
 254     unsigned slice_size;
 255     unsigned padding;
 256     unsigned i;
 257     unsigned type;
 258
 259     /* Create an annex B bitstream buffer with only slice NAL and finalize slice */
 260 #if CONFIG_D3D11VA
 261     if (ff_dxva2_is_d3d11(avctx)) {
 262         type = D3D11_VIDEO_DECODER_BUFFER_BITSTREAM;
 263         if (FAILED(ID3D11VideoContext_GetDecoderBuffer(D3D11VA_CONTEXT(ctx)->video_context,
 264                                                        D3D11VA_CONTEXT(ctx)->decoder,
 265                                                        type,
 266                                                        &dxva_size, &dxva_data_ptr)))
 267             return -1;
 268     }
 269 #endif
 270 #if CONFIG_DXVA2
 271     if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD) {
 272         type = DXVA2_BitStreamDateBufferType;
 273         if (FAILED(IDirectXVideoDecoder_GetBuffer(DXVA2_CONTEXT(ctx)->decoder,
 274                                                   type,
 275                                                   &dxva_data_ptr, &dxva_size)))
 276             return -1;
 277     }
 278 #endif
 279
 280     dxva_data = dxva_data_ptr;
 281     current = dxva_data;
 282     end = dxva_data + dxva_size;
 283
 284     for (i = 0; i < ctx_pic->slice_count; i++) {
 285         static const uint8_t start_code[] = { 0, 0, 1 };
 286         static const unsigned start_code_size = sizeof(start_code);
 287         unsigned position, size;
 288
 289         slice = &ctx_pic->slice_short[i];
 290
 291         position = slice->BSNALunitDataLocation;
 292         size     = slice->SliceBytesInBuffer;
 293         if (start_code_size + size > end - current) {
 294             av_log(avctx, AV_LOG_ERROR, "Failed to build bitstream");
 295             break;
 296         }
 297
 298         slice->BSNALunitDataLocation = current - dxva_data;
 299         slice->SliceBytesInBuffer    = start_code_size + size;
 300
 301         memcpy(current, start_code, start_code_size);
 302         current += start_code_size;
 303
 304         memcpy(current, &ctx_pic->bitstream[position], size);
 305         current += size;
 306     }
 307     padding = FFMIN(128 - ((current - dxva_data) & 127), end - current);
 308     if (slice && padding > 0) {
 309         memset(current, 0, padding);
 310         current += padding;
 311
 312         slice->SliceBytesInBuffer += padding;
 313     }
 314 #if CONFIG_D3D11VA
 315     if (ff_dxva2_is_d3d11(avctx))
 316         if (FAILED(ID3D11VideoContext_ReleaseDecoderBuffer(D3D11VA_CONTEXT(ctx)->video_context, D3D11VA_CONTEXT(ctx)->decoder, type)))
 317             return -1;
 318 #endif
 319 #if CONFIG_DXVA2
 320     if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD)
 321         if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(DXVA2_CONTEXT(ctx)->decoder, type)))
 322             return -1;
 323 #endif
 324     if (i < ctx_pic->slice_count)
 325         return -1;
 326
 327 #if CONFIG_D3D11VA
 328     if (ff_dxva2_is_d3d11(avctx)) {
 329         D3D11_VIDEO_DECODER_BUFFER_DESC *dsc11 = bs;
 330         memset(dsc11, 0, sizeof(*dsc11));
 331         dsc11->BufferType           = type;
 332         dsc11->DataSize             = current - dxva_data;
 333         dsc11->NumMBsInBuffer       = 0;
 334
 335         type = D3D11_VIDEO_DECODER_BUFFER_SLICE_CONTROL;
 336     }
 337 #endif
 338 #if CONFIG_DXVA2
 339     if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD) {
 340         DXVA2_DecodeBufferDesc *dsc2 = bs;
 341         memset(dsc2, 0, sizeof(*dsc2));
 342         dsc2->CompressedBufferType = type;
 343         dsc2->DataSize             = current - dxva_data;
 344         dsc2->NumMBsInBuffer       = 0;
 345
 346         type = DXVA2_SliceControlBufferType;
 347     }
 348 #endif
 349
 350     slice_data = ctx_pic->slice_short;
 351     slice_size = ctx_pic->slice_count * sizeof(*ctx_pic->slice_short);
 352
 353     av_assert0(((current - dxva_data) & 127) == 0);
 354     return ff_dxva2_commit_buffer(avctx, ctx, sc,
 355                                   type,
 356                                   slice_data, slice_size, 0);
 357 }
 358
 359
 360 static int dxva2_hevc_start_frame(AVCodecContext *avctx,
 361                                   av_unused const uint8_t *buffer,
 362                                   av_unused uint32_t size)
 363 {
 364     const HEVCContext *h = avctx->priv_data;
 365     AVDXVAContext *ctx = DXVA_CONTEXT(avctx);
 366     struct hevc_dxva2_picture_context *ctx_pic = h->ref->hwaccel_picture_private;
 367
 368     if (!DXVA_CONTEXT_VALID(avctx, ctx))
 369         return -1;
 370     av_assert0(ctx_pic);
 371
 372     /* Fill up DXVA_PicParams_HEVC */
 373     fill_picture_parameters(avctx, ctx, h, &ctx_pic->pp);
 374
 375     /* Fill up DXVA_Qmatrix_HEVC */
 376     fill_scaling_lists(ctx, h, &ctx_pic->qm);
 377
 378     ctx_pic->slice_count    = 0;
 379     ctx_pic->bitstream_size = 0;
 380     ctx_pic->bitstream      = NULL;
 381     return 0;
 382 }
 383
 384 static int dxva2_hevc_decode_slice(AVCodecContext *avctx,
 385                                    const uint8_t *buffer,
 386                                    uint32_t size)
 387 {
 388     const HEVCContext *h = avctx->priv_data;
 389     const HEVCFrame *current_picture = h->ref;
 390     struct hevc_dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
 391     unsigned position;
 392
 393     if (ctx_pic->slice_count >= MAX_SLICES)
 394         return -1;
 395
 396     if (!ctx_pic->bitstream)
 397         ctx_pic->bitstream = buffer;
 398     ctx_pic->bitstream_size += size;
 399
 400     position = buffer - ctx_pic->bitstream;
 401     fill_slice_short(&ctx_pic->slice_short[ctx_pic->slice_count], position, size);
 402     ctx_pic->slice_count++;
 403
 404     return 0;
 405 }
 406
 407 static int dxva2_hevc_end_frame(AVCodecContext *avctx)
 408 {
 409     HEVCContext *h = avctx->priv_data;
 410     struct hevc_dxva2_picture_context *ctx_pic = h->ref->hwaccel_picture_private;
 411     int scale = ctx_pic->pp.dwCodingParamToolFlags & 1;
 412     int ret;
 413
 414     if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0)
 415         return -1;
 416
 417     ret = ff_dxva2_common_end_frame(avctx, h->ref->frame,
 418                                     &ctx_pic->pp, sizeof(ctx_pic->pp),
 419                                     scale ? &ctx_pic->qm : NULL, scale ? sizeof(ctx_pic->qm) : 0,
 420                                     commit_bitstream_and_slice_buffer);
 421     return ret;
 422 }
 423
 424 #if CONFIG_HEVC_DXVA2_HWACCEL
 425 AVHWAccel ff_hevc_dxva2_hwaccel = {
 426     .name           = "hevc_dxva2",
 427     .type           = AVMEDIA_TYPE_VIDEO,
 428     .id             = AV_CODEC_ID_HEVC,
 429     .pix_fmt        = AV_PIX_FMT_DXVA2_VLD,
 430     .init           = ff_dxva2_decode_init,
 431     .uninit         = ff_dxva2_decode_uninit,
 432     .start_frame    = dxva2_hevc_start_frame,
 433     .decode_slice   = dxva2_hevc_decode_slice,
 434     .end_frame      = dxva2_hevc_end_frame,
 435     .frame_priv_data_size = sizeof(struct hevc_dxva2_picture_context),
 436     .priv_data_size = sizeof(FFDXVASharedContext),
 437 };
 438 #endif
 439
 440 #if CONFIG_HEVC_D3D11VA_HWACCEL
 441 AVHWAccel ff_hevc_d3d11va_hwaccel = {
 442     .name           = "hevc_d3d11va",
 443     .type           = AVMEDIA_TYPE_VIDEO,
 444     .id             = AV_CODEC_ID_HEVC,
 445     .pix_fmt        = AV_PIX_FMT_D3D11VA_VLD,
 446     .init           = ff_dxva2_decode_init,
 447     .uninit         = ff_dxva2_decode_uninit,
 448     .start_frame    = dxva2_hevc_start_frame,
 449     .decode_slice   = dxva2_hevc_decode_slice,
 450     .end_frame      = dxva2_hevc_end_frame,
 451     .frame_priv_data_size = sizeof(struct hevc_dxva2_picture_context),
 452     .priv_data_size = sizeof(FFDXVASharedContext),
 453 };
 454 #endif
 455
 456 #if CONFIG_HEVC_D3D11VA2_HWACCEL
 457 AVHWAccel ff_hevc_d3d11va2_hwaccel = {
 458     .name           = "hevc_d3d11va2",
 459     .type           = AVMEDIA_TYPE_VIDEO,
 460     .id             = AV_CODEC_ID_HEVC,
 461     .pix_fmt        = AV_PIX_FMT_D3D11,
 462     .init           = ff_dxva2_decode_init,
 463     .uninit         = ff_dxva2_decode_uninit,
 464     .start_frame    = dxva2_hevc_start_frame,
 465     .decode_slice   = dxva2_hevc_decode_slice,
 466     .end_frame      = dxva2_hevc_end_frame,
 467     .frame_priv_data_size = sizeof(struct hevc_dxva2_picture_context),
 468     .priv_data_size = sizeof(FFDXVASharedContext),
 469 };
 470 #endif