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