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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 "dxva2_internal.h"
  26 #include "hevc_data.h"
  27 #include "hevcdec.h"
  28
  29 #define MAX_SLICES 256
  30
  31 struct hevc_dxva2_picture_context {
  32     DXVA_PicParams_HEVC   pp;
  33     DXVA_Qmatrix_HEVC     qm;
  34     unsigned              slice_count;
  35     DXVA_Slice_HEVC_Short slice_short[MAX_SLICES];
  36     const uint8_t         *bitstream;
  37     unsigned              bitstream_size;
  38 };
  39
  40 static void fill_picture_entry(DXVA_PicEntry_HEVC *pic,
  41                                unsigned index, unsigned flag)
  42 {
  43     av_assert0((index & 0x7f) == index && (flag & 0x01) == flag);
  44     pic->bPicEntry = index | (flag << 7);
  45 }
  46
  47 static int get_refpic_index(const DXVA_PicParams_HEVC *pp, int surface_index)
  48 {
  49     int i;
  50     for (i = 0; i < FF_ARRAY_ELEMS(pp->RefPicList); i++) {
  51         if ((pp->RefPicList[i].bPicEntry & 0x7f) == surface_index)
  52           return i;
  53     }
  54     return 0xff;
  55 }
  56
  57 static void fill_picture_parameters(const AVCodecContext *avctx, AVDXVAContext *ctx, const HEVCContext *h,
  58                                     DXVA_PicParams_HEVC *pp)
  59 {
  60     const HEVCFrame *current_picture = h->ref;
  61     const HEVCSPS *sps = h->ps.sps;
  62     const HEVCPPS *pps = h->ps.pps;
  63     int i, j;
  64
  65     memset(pp, 0, sizeof(*pp));
  66
  67     pp->PicWidthInMinCbsY  = sps->min_cb_width;
  68     pp->PicHeightInMinCbsY = sps->min_cb_height;
  69
  70     pp->wFormatAndSequenceInfoFlags = (sps->chroma_format_idc             <<  0) |
  71                                       (sps->separate_colour_plane_flag    <<  2) |
  72                                       ((sps->bit_depth - 8)               <<  3) |
  73                                       ((sps->bit_depth - 8)               <<  6) |
  74                                       ((sps->log2_max_poc_lsb - 4)        <<  9) |
  75                                       (0                                  << 13) |
  76                                       (0                                  << 14) |
  77                                       (0                                  << 15);
  78
  79     fill_picture_entry(&pp->CurrPic, ff_dxva2_get_surface_index(avctx, ctx, current_picture->frame), 0);
  80
  81     pp->sps_max_dec_pic_buffering_minus1         = sps->temporal_layer[sps->max_sub_layers - 1].max_dec_pic_buffering - 1;
  82     pp->log2_min_luma_coding_block_size_minus3   = sps->log2_min_cb_size - 3;
  83     pp->log2_diff_max_min_luma_coding_block_size = sps->log2_diff_max_min_coding_block_size;
  84     pp->log2_min_transform_block_size_minus2     = sps->log2_min_tb_size - 2;
  85     pp->log2_diff_max_min_transform_block_size   = sps->log2_max_trafo_size  - sps->log2_min_tb_size;
  86     pp->max_transform_hierarchy_depth_inter      = sps->max_transform_hierarchy_depth_inter;
  87     pp->max_transform_hierarchy_depth_intra      = sps->max_transform_hierarchy_depth_intra;
  88     pp->num_short_term_ref_pic_sets              = sps->nb_st_rps;
  89     pp->num_long_term_ref_pics_sps               = sps->num_long_term_ref_pics_sps;
  90
  91     pp->num_ref_idx_l0_default_active_minus1     = pps->num_ref_idx_l0_default_active - 1;
  92     pp->num_ref_idx_l1_default_active_minus1     = pps->num_ref_idx_l1_default_active - 1;
  93     pp->init_qp_minus26                          = pps->pic_init_qp_minus26;
  94
  95     if (h->sh.short_term_ref_pic_set_sps_flag == 0 && h->sh.short_term_rps) {
  96         pp->ucNumDeltaPocsOfRefRpsIdx            = h->sh.short_term_rps->rps_idx_num_delta_pocs;
  97         pp->wNumBitsForShortTermRPSInSlice       = h->sh.short_term_ref_pic_set_size;
  98     }
  99
 100     pp->dwCodingParamToolFlags = (sps->scaling_list_enable_flag                  <<  0) |
 101                                  (sps->amp_enabled_flag                          <<  1) |
 102                                  (sps->sao_enabled                               <<  2) |
 103                                  (sps->pcm_enabled_flag                          <<  3) |
 104                                  ((sps->pcm_enabled_flag ? (sps->pcm.bit_depth - 1) : 0)            <<  4) |
 105                                  ((sps->pcm_enabled_flag ? (sps->pcm.bit_depth_chroma - 1) : 0)     <<  8) |
 106                                  ((sps->pcm_enabled_flag ? (sps->pcm.log2_min_pcm_cb_size - 3) : 0) << 12) |
 107                                  ((sps->pcm_enabled_flag ? (sps->pcm.log2_max_pcm_cb_size - sps->pcm.log2_min_pcm_cb_size) : 0) << 14) |
 108                                  (sps->pcm.loop_filter_disable_flag              << 16) |
 109                                  (sps->long_term_ref_pics_present_flag           << 17) |
 110                                  (sps->sps_temporal_mvp_enabled_flag             << 18) |
 111                                  (sps->sps_strong_intra_smoothing_enable_flag    << 19) |
 112                                  (pps->dependent_slice_segments_enabled_flag     << 20) |
 113                                  (pps->output_flag_present_flag                  << 21) |
 114                                  (pps->num_extra_slice_header_bits               << 22) |
 115                                  (pps->sign_data_hiding_flag                     << 25) |
 116                                  (pps->cabac_init_present_flag                   << 26) |
 117                                  (0                                              << 27);
 118
 119     pp->dwCodingSettingPicturePropertyFlags = (pps->constrained_intra_pred_flag                   <<  0) |
 120                                               (pps->transform_skip_enabled_flag                   <<  1) |
 121                                               (pps->cu_qp_delta_enabled_flag                      <<  2) |
 122                                               (pps->pic_slice_level_chroma_qp_offsets_present_flag <<  3) |
 123                                               (pps->weighted_pred_flag                            <<  4) |
 124                                               (pps->weighted_bipred_flag                          <<  5) |
 125                                               (pps->transquant_bypass_enable_flag                 <<  6) |
 126                                               (pps->tiles_enabled_flag                            <<  7) |
 127                                               (pps->entropy_coding_sync_enabled_flag              <<  8) |
 128                                               (pps->uniform_spacing_flag                          <<  9) |
 129                                               ((pps->tiles_enabled_flag ? pps->loop_filter_across_tiles_enabled_flag : 0) << 10) |
 130                                               (pps->seq_loop_filter_across_slices_enabled_flag    << 11) |
 131                                               (pps->deblocking_filter_override_enabled_flag       << 12) |
 132                                               (pps->disable_dbf                                   << 13) |
 133                                               (pps->lists_modification_present_flag               << 14) |
 134                                               (pps->slice_header_extension_present_flag           << 15) |
 135                                               (IS_IRAP(h)                                         << 16) |
 136                                               (IS_IDR(h)                                          << 17) |
 137                                               /* IntraPicFlag */
 138                                               (IS_IRAP(h)                                         << 18) |
 139                                               (0                                                  << 19);
 140     pp->pps_cb_qp_offset            = pps->cb_qp_offset;
 141     pp->pps_cr_qp_offset            = pps->cr_qp_offset;
 142     if (pps->tiles_enabled_flag) {
 143         pp->num_tile_columns_minus1 = pps->num_tile_columns - 1;
 144         pp->num_tile_rows_minus1    = pps->num_tile_rows - 1;
 145
 146         if (!pps->uniform_spacing_flag) {
 147             for (i = 0; i < pps->num_tile_columns; i++)
 148                 pp->column_width_minus1[i] = pps->column_width[i] - 1;
 149
 150             for (i = 0; i < pps->num_tile_rows; i++)
 151                 pp->row_height_minus1[i] = pps->row_height[i] - 1;
 152         }
 153     }
 154
 155     pp->diff_cu_qp_delta_depth           = pps->diff_cu_qp_delta_depth;
 156     pp->pps_beta_offset_div2             = pps->beta_offset / 2;
 157     pp->pps_tc_offset_div2               = pps->tc_offset / 2;
 158     pp->log2_parallel_merge_level_minus2 = pps->log2_parallel_merge_level - 2;
 159     pp->CurrPicOrderCntVal               = h->poc;
 160
 161     // fill RefPicList from the DPB
 162     for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->RefPicList); i++) {
 163         const HEVCFrame *frame = NULL;
 164         while (!frame && j < FF_ARRAY_ELEMS(h->DPB)) {
 165             if (&h->DPB[j] != current_picture && (h->DPB[j].flags & (HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF)))
 166                 frame = &h->DPB[j];
 167             j++;
 168         }
 169
 170         if (frame) {
 171             fill_picture_entry(&pp->RefPicList[i], ff_dxva2_get_surface_index(avctx, ctx, frame->frame), !!(frame->flags & HEVC_FRAME_FLAG_LONG_REF));
 172             pp->PicOrderCntValList[i] = frame->poc;
 173         } else {
 174             pp->RefPicList[i].bPicEntry = 0xff;
 175             pp->PicOrderCntValList[i]   = 0;
 176         }
 177     }
 178
 179     #define DO_REF_LIST(ref_idx, ref_list) { \
 180         const RefPicList *rpl = &h->rps[ref_idx]; \
 181         for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->ref_list); i++) { \
 182             const HEVCFrame *frame = NULL; \
 183             while (!frame && j < rpl->nb_refs) \
 184                 frame = rpl->ref[j++]; \
 185             if (frame) \
 186                 pp->ref_list[i] = get_refpic_index(pp, ff_dxva2_get_surface_index(avctx, ctx, frame->frame)); \
 187             else \
 188                 pp->ref_list[i] = 0xff; \
 189         } \
 190     }
 191
 192     // Fill short term and long term lists
 193     DO_REF_LIST(ST_CURR_BEF, RefPicSetStCurrBefore);
 194     DO_REF_LIST(ST_CURR_AFT, RefPicSetStCurrAfter);
 195     DO_REF_LIST(LT_CURR, RefPicSetLtCurr);
 196
 197     pp->StatusReportFeedbackNumber = 1 + DXVA_CONTEXT_REPORT_ID(avctx, ctx)++;
 198 }
 199
 200 static void fill_scaling_lists(AVDXVAContext *ctx, const HEVCContext *h, DXVA_Qmatrix_HEVC *qm)
 201 {
 202     unsigned i, j, pos;
 203     const ScalingList *sl = h->ps.pps->scaling_list_data_present_flag ?
 204                             &h->ps.pps->scaling_list : &h->ps.sps->scaling_list;
 205
 206     memset(qm, 0, sizeof(*qm));
 207     for (i = 0; i < 6; i++) {
 208         for (j = 0; j < 16; j++) {
 209             pos = 4 * ff_hevc_diag_scan4x4_y[j] + ff_hevc_diag_scan4x4_x[j];
 210             qm->ucScalingLists0[i][j] = sl->sl[0][i][pos];
 211         }
 212
 213         for (j = 0; j < 64; j++) {
 214             pos = 8 * ff_hevc_diag_scan8x8_y[j] + ff_hevc_diag_scan8x8_x[j];
 215             qm->ucScalingLists1[i][j] = sl->sl[1][i][pos];
 216             qm->ucScalingLists2[i][j] = sl->sl[2][i][pos];
 217
 218             if (i < 2)
 219                 qm->ucScalingLists3[i][j] = sl->sl[3][i * 3][pos];
 220         }
 221
 222         qm->ucScalingListDCCoefSizeID2[i] = sl->sl_dc[0][i];
 223         if (i < 2)
 224             qm->ucScalingListDCCoefSizeID3[i] = sl->sl_dc[1][i * 3];
 225     }
 226 }
 227
 228 static void fill_slice_short(DXVA_Slice_HEVC_Short *slice,
 229                              unsigned position, unsigned size)
 230 {
 231     memset(slice, 0, sizeof(*slice));
 232     slice->BSNALunitDataLocation = position;
 233     slice->SliceBytesInBuffer    = size;
 234     slice->wBadSliceChopping     = 0;
 235 }
 236
 237 static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
 238                                              DECODER_BUFFER_DESC *bs,
 239                                              DECODER_BUFFER_DESC *sc)
 240 {
 241     const HEVCContext *h = avctx->priv_data;
 242     AVDXVAContext *ctx = DXVA_CONTEXT(avctx);
 243     const HEVCFrame *current_picture = h->ref;
 244     struct hevc_dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
 245     DXVA_Slice_HEVC_Short *slice = NULL;
 246     void     *dxva_data_ptr;
 247     uint8_t  *dxva_data, *current, *end;
 248     unsigned dxva_size;
 249     void     *slice_data;
 250     unsigned slice_size;
 251     unsigned padding;
 252     unsigned i;
 253     unsigned type;
 254
 255     /* Create an annex B bitstream buffer with only slice NAL and finalize slice */
 256 #if CONFIG_D3D11VA
 257     if (ff_dxva2_is_d3d11(avctx)) {
 258         type = D3D11_VIDEO_DECODER_BUFFER_BITSTREAM;
 259         if (FAILED(ID3D11VideoContext_GetDecoderBuffer(D3D11VA_CONTEXT(ctx)->video_context,
 260                                                        D3D11VA_CONTEXT(ctx)->decoder,
 261                                                        type,
 262                                                        &dxva_size, &dxva_data_ptr)))
 263             return -1;
 264     }
 265 #endif
 266 #if CONFIG_DXVA2
 267     if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD) {
 268         type = DXVA2_BitStreamDateBufferType;
 269         if (FAILED(IDirectXVideoDecoder_GetBuffer(DXVA2_CONTEXT(ctx)->decoder,
 270                                                   type,
 271                                                   &dxva_data_ptr, &dxva_size)))
 272             return -1;
 273     }
 274 #endif
 275
 276     dxva_data = dxva_data_ptr;
 277     current = dxva_data;
 278     end = dxva_data + dxva_size;
 279
 280     for (i = 0; i < ctx_pic->slice_count; i++) {
 281         static const uint8_t start_code[] = { 0, 0, 1 };
 282         static const unsigned start_code_size = sizeof(start_code);
 283         unsigned position, size;
 284
 285         slice = &ctx_pic->slice_short[i];
 286
 287         position = slice->BSNALunitDataLocation;
 288         size     = slice->SliceBytesInBuffer;
 289         if (start_code_size + size > end - current) {
 290             av_log(avctx, AV_LOG_ERROR, "Failed to build bitstream");
 291             break;
 292         }
 293
 294         slice->BSNALunitDataLocation = current - dxva_data;
 295         slice->SliceBytesInBuffer    = start_code_size + size;
 296
 297         memcpy(current, start_code, start_code_size);
 298         current += start_code_size;
 299
 300         memcpy(current, &ctx_pic->bitstream[position], size);
 301         current += size;
 302     }
 303     padding = FFMIN(128 - ((current - dxva_data) & 127), end - current);
 304     if (slice && padding > 0) {
 305         memset(current, 0, padding);
 306         current += padding;
 307
 308         slice->SliceBytesInBuffer += padding;
 309     }
 310 #if CONFIG_D3D11VA
 311     if (ff_dxva2_is_d3d11(avctx))
 312         if (FAILED(ID3D11VideoContext_ReleaseDecoderBuffer(D3D11VA_CONTEXT(ctx)->video_context, D3D11VA_CONTEXT(ctx)->decoder, type)))
 313             return -1;
 314 #endif
 315 #if CONFIG_DXVA2
 316     if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD)
 317         if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(DXVA2_CONTEXT(ctx)->decoder, type)))
 318             return -1;
 319 #endif
 320     if (i < ctx_pic->slice_count)
 321         return -1;
 322
 323 #if CONFIG_D3D11VA
 324     if (ff_dxva2_is_d3d11(avctx)) {
 325         D3D11_VIDEO_DECODER_BUFFER_DESC *dsc11 = bs;
 326         memset(dsc11, 0, sizeof(*dsc11));
 327         dsc11->BufferType           = type;
 328         dsc11->DataSize             = current - dxva_data;
 329         dsc11->NumMBsInBuffer       = 0;
 330
 331         type = D3D11_VIDEO_DECODER_BUFFER_SLICE_CONTROL;
 332     }
 333 #endif
 334 #if CONFIG_DXVA2
 335     if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD) {
 336         DXVA2_DecodeBufferDesc *dsc2 = bs;
 337         memset(dsc2, 0, sizeof(*dsc2));
 338         dsc2->CompressedBufferType = type;
 339         dsc2->DataSize             = current - dxva_data;
 340         dsc2->NumMBsInBuffer       = 0;
 341
 342         type = DXVA2_SliceControlBufferType;
 343     }
 344 #endif
 345
 346     slice_data = ctx_pic->slice_short;
 347     slice_size = ctx_pic->slice_count * sizeof(*ctx_pic->slice_short);
 348
 349     av_assert0(((current - dxva_data) & 127) == 0);
 350     return ff_dxva2_commit_buffer(avctx, ctx, sc,
 351                                   type,
 352                                   slice_data, slice_size, 0);
 353 }
 354
 355
 356 static int dxva2_hevc_start_frame(AVCodecContext *avctx,
 357                                   av_unused const uint8_t *buffer,
 358                                   av_unused uint32_t size)
 359 {
 360     const HEVCContext *h = avctx->priv_data;
 361     AVDXVAContext *ctx = DXVA_CONTEXT(avctx);
 362     struct hevc_dxva2_picture_context *ctx_pic = h->ref->hwaccel_picture_private;
 363
 364     if (!DXVA_CONTEXT_VALID(avctx, ctx))
 365         return -1;
 366     av_assert0(ctx_pic);
 367
 368     /* Fill up DXVA_PicParams_HEVC */
 369     fill_picture_parameters(avctx, ctx, h, &ctx_pic->pp);
 370
 371     /* Fill up DXVA_Qmatrix_HEVC */
 372     fill_scaling_lists(ctx, h, &ctx_pic->qm);
 373
 374     ctx_pic->slice_count    = 0;
 375     ctx_pic->bitstream_size = 0;
 376     ctx_pic->bitstream      = NULL;
 377     return 0;
 378 }
 379
 380 static int dxva2_hevc_decode_slice(AVCodecContext *avctx,
 381                                    const uint8_t *buffer,
 382                                    uint32_t size)
 383 {
 384     const HEVCContext *h = avctx->priv_data;
 385     const HEVCFrame *current_picture = h->ref;
 386     struct hevc_dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
 387     unsigned position;
 388
 389     if (ctx_pic->slice_count >= MAX_SLICES)
 390         return -1;
 391
 392     if (!ctx_pic->bitstream)
 393         ctx_pic->bitstream = buffer;
 394     ctx_pic->bitstream_size += size;
 395
 396     position = buffer - ctx_pic->bitstream;
 397     fill_slice_short(&ctx_pic->slice_short[ctx_pic->slice_count], position, size);
 398     ctx_pic->slice_count++;
 399
 400     return 0;
 401 }
 402
 403 static int dxva2_hevc_end_frame(AVCodecContext *avctx)
 404 {
 405     HEVCContext *h = avctx->priv_data;
 406     struct hevc_dxva2_picture_context *ctx_pic = h->ref->hwaccel_picture_private;
 407     int scale = ctx_pic->pp.dwCodingParamToolFlags & 1;
 408     int ret;
 409
 410     if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0)
 411         return -1;
 412
 413     ret = ff_dxva2_common_end_frame(avctx, h->ref->frame,
 414                                     &ctx_pic->pp, sizeof(ctx_pic->pp),
 415                                     scale ? &ctx_pic->qm : NULL, scale ? sizeof(ctx_pic->qm) : 0,
 416                                     commit_bitstream_and_slice_buffer);
 417     return ret;
 418 }
 419
 420 #if CONFIG_HEVC_DXVA2_HWACCEL
 421 const AVHWAccel ff_hevc_dxva2_hwaccel = {
 422     .name           = "hevc_dxva2",
 423     .type           = AVMEDIA_TYPE_VIDEO,
 424     .id             = AV_CODEC_ID_HEVC,
 425     .pix_fmt        = AV_PIX_FMT_DXVA2_VLD,
 426     .init           = ff_dxva2_decode_init,
 427     .uninit         = ff_dxva2_decode_uninit,
 428     .start_frame    = dxva2_hevc_start_frame,
 429     .decode_slice   = dxva2_hevc_decode_slice,
 430     .end_frame      = dxva2_hevc_end_frame,
 431     .frame_params   = ff_dxva2_common_frame_params,
 432     .frame_priv_data_size = sizeof(struct hevc_dxva2_picture_context),
 433     .priv_data_size = sizeof(FFDXVASharedContext),
 434 };
 435 #endif
 436
 437 #if CONFIG_HEVC_D3D11VA_HWACCEL
 438 const AVHWAccel ff_hevc_d3d11va_hwaccel = {
 439     .name           = "hevc_d3d11va",
 440     .type           = AVMEDIA_TYPE_VIDEO,
 441     .id             = AV_CODEC_ID_HEVC,
 442     .pix_fmt        = AV_PIX_FMT_D3D11VA_VLD,
 443     .init           = ff_dxva2_decode_init,
 444     .uninit         = ff_dxva2_decode_uninit,
 445     .start_frame    = dxva2_hevc_start_frame,
 446     .decode_slice   = dxva2_hevc_decode_slice,
 447     .end_frame      = dxva2_hevc_end_frame,
 448     .frame_params   = ff_dxva2_common_frame_params,
 449     .frame_priv_data_size = sizeof(struct hevc_dxva2_picture_context),
 450     .priv_data_size = sizeof(FFDXVASharedContext),
 451 };
 452 #endif
 453
 454 #if CONFIG_HEVC_D3D11VA2_HWACCEL
 455 const AVHWAccel ff_hevc_d3d11va2_hwaccel = {
 456     .name           = "hevc_d3d11va2",
 457     .type           = AVMEDIA_TYPE_VIDEO,
 458     .id             = AV_CODEC_ID_HEVC,
 459     .pix_fmt        = AV_PIX_FMT_D3D11,
 460     .init           = ff_dxva2_decode_init,
 461     .uninit         = ff_dxva2_decode_uninit,
 462     .start_frame    = dxva2_hevc_start_frame,
 463     .decode_slice   = dxva2_hevc_decode_slice,
 464     .end_frame      = dxva2_hevc_end_frame,
 465     .frame_params   = ff_dxva2_common_frame_params,
 466     .frame_priv_data_size = sizeof(struct hevc_dxva2_picture_context),
 467     .priv_data_size = sizeof(FFDXVASharedContext),
 468 };
 469 #endif