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

   1 /*
   2  * HEVC HW decode acceleration through NVDEC
   3  *
   4  * Copyright (c) 2017 Anton Khirnov
   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 <stdint.h>
  24 #include <string.h>
  25
  26 #include "avcodec.h"
  27 #include "nvdec.h"
  28 #include "decode.h"
  29 #include "internal.h"
  30 #include "hevcdec.h"
  31 #include "hevc_data.h"
  32
  33 static void dpb_add(CUVIDHEVCPICPARAMS *pp, int idx, const HEVCFrame *src)
  34 {
  35     FrameDecodeData *fdd = (FrameDecodeData*)src->frame->private_ref->data;
  36     const NVDECFrame *cf = fdd->hwaccel_priv;
  37
  38     pp->RefPicIdx[idx]      = cf ? cf->idx : -1;
  39     pp->PicOrderCntVal[idx] = src->poc;
  40     pp->IsLongTerm[idx]     = !!(src->flags & HEVC_FRAME_FLAG_LONG_REF);
  41 }
  42
  43 static void fill_scaling_lists(CUVIDHEVCPICPARAMS *ppc, const HEVCContext *s)
  44 {
  45     const ScalingList *sl = s->ps.pps->scaling_list_data_present_flag ?
  46                             &s->ps.pps->scaling_list : &s->ps.sps->scaling_list;
  47     int i, j, pos;
  48
  49     for (i = 0; i < 6; i++) {
  50         for (j = 0; j < 16; j++) {
  51             pos = 4 * ff_hevc_diag_scan4x4_y[j] + ff_hevc_diag_scan4x4_x[j];
  52             ppc->ScalingList4x4[i][j] = sl->sl[0][i][pos];
  53         }
  54
  55         for (j = 0; j < 64; j++) {
  56             pos = 8 * ff_hevc_diag_scan8x8_y[j] + ff_hevc_diag_scan8x8_x[j];
  57             ppc->ScalingList8x8[i][j]   = sl->sl[1][i][pos];
  58             ppc->ScalingList16x16[i][j] = sl->sl[2][i][pos];
  59
  60             if (i < 2)
  61                 ppc->ScalingList32x32[i][j] = sl->sl[3][i * 3][pos];
  62         }
  63
  64         ppc->ScalingListDCCoeff16x16[i] = sl->sl_dc[0][i];
  65         if (i < 2)
  66             ppc->ScalingListDCCoeff32x32[i] = sl->sl_dc[1][i * 3];
  67     }
  68 }
  69
  70 static int nvdec_hevc_start_frame(AVCodecContext *avctx,
  71                                   const uint8_t *buffer, uint32_t size)
  72 {
  73     const HEVCContext *s = avctx->priv_data;
  74     const HEVCPPS *pps = s->ps.pps;
  75     const HEVCSPS *sps = s->ps.sps;
  76
  77     NVDECContext       *ctx = avctx->internal->hwaccel_priv_data;
  78     CUVIDPICPARAMS      *pp = &ctx->pic_params;
  79     CUVIDHEVCPICPARAMS *ppc = &pp->CodecSpecific.hevc;
  80     FrameDecodeData *fdd;
  81     NVDECFrame *cf;
  82
  83     int i, j, dpb_size, ret;
  84
  85     ret = ff_nvdec_start_frame(avctx, s->ref->frame);
  86     if (ret < 0)
  87         return ret;
  88
  89     fdd = (FrameDecodeData*)s->ref->frame->private_ref->data;
  90     cf  = (NVDECFrame*)fdd->hwaccel_priv;
  91
  92     *pp = (CUVIDPICPARAMS) {
  93         .PicWidthInMbs     = sps->width  / 16,
  94         .FrameHeightInMbs  = sps->height / 16,
  95         .CurrPicIdx        = cf->idx,
  96         .ref_pic_flag      = 1,
  97         .intra_pic_flag    = IS_IRAP(s),
  98
  99         .CodecSpecific.hevc = {
 100             .pic_width_in_luma_samples                    = sps->width,
 101             .pic_height_in_luma_samples                   = sps->height,
 102             .log2_min_luma_coding_block_size_minus3       = sps->log2_min_cb_size - 3,
 103             .log2_diff_max_min_luma_coding_block_size     = sps->log2_diff_max_min_coding_block_size,
 104             .log2_min_transform_block_size_minus2         = sps->log2_min_tb_size - 2,
 105             .log2_diff_max_min_transform_block_size       = sps->log2_max_trafo_size - sps->log2_min_tb_size,
 106             .pcm_enabled_flag                             = sps->pcm_enabled_flag,
 107             .log2_min_pcm_luma_coding_block_size_minus3   = sps->pcm_enabled_flag ? sps->pcm.log2_min_pcm_cb_size - 3 : 0,
 108             .log2_diff_max_min_pcm_luma_coding_block_size = sps->pcm.log2_max_pcm_cb_size - sps->pcm.log2_min_pcm_cb_size,
 109             .pcm_sample_bit_depth_luma_minus1             = sps->pcm_enabled_flag ? sps->pcm.bit_depth - 1 : 0,
 110             .pcm_sample_bit_depth_chroma_minus1           = sps->pcm_enabled_flag ? sps->pcm.bit_depth_chroma - 1 : 0,
 111 #if NVDECAPI_CHECK_VERSION(8, 1)
 112             .log2_max_transform_skip_block_size_minus2    = pps->log2_max_transform_skip_block_size - 2,
 113             .log2_sao_offset_scale_luma                   = pps->log2_sao_offset_scale_luma,
 114             .log2_sao_offset_scale_chroma                 = pps->log2_sao_offset_scale_chroma,
 115             .high_precision_offsets_enabled_flag          = sps->high_precision_offsets_enabled_flag,
 116 #endif
 117             .pcm_loop_filter_disabled_flag                = sps->pcm.loop_filter_disable_flag,
 118             .strong_intra_smoothing_enabled_flag          = sps->sps_strong_intra_smoothing_enable_flag,
 119             .max_transform_hierarchy_depth_intra          = sps->max_transform_hierarchy_depth_intra,
 120             .max_transform_hierarchy_depth_inter          = sps->max_transform_hierarchy_depth_inter,
 121             .amp_enabled_flag                             = sps->amp_enabled_flag,
 122             .separate_colour_plane_flag                   = sps->separate_colour_plane_flag,
 123             .log2_max_pic_order_cnt_lsb_minus4            = sps->log2_max_poc_lsb - 4,
 124             .num_short_term_ref_pic_sets                  = sps->nb_st_rps,
 125             .long_term_ref_pics_present_flag              = sps->long_term_ref_pics_present_flag,
 126             .num_long_term_ref_pics_sps                   = sps->num_long_term_ref_pics_sps,
 127             .sps_temporal_mvp_enabled_flag                = sps->sps_temporal_mvp_enabled_flag,
 128             .sample_adaptive_offset_enabled_flag          = sps->sao_enabled,
 129             .scaling_list_enable_flag                     = sps->scaling_list_enable_flag,
 130             .IrapPicFlag                                  = IS_IRAP(s),
 131             .IdrPicFlag                                   = IS_IDR(s),
 132             .bit_depth_luma_minus8                        = sps->bit_depth - 8,
 133             .bit_depth_chroma_minus8                      = sps->bit_depth - 8,
 134 #if NVDECAPI_CHECK_VERSION(9, 0)
 135             .sps_range_extension_flag                     = sps->sps_range_extension_flag,
 136             .transform_skip_rotation_enabled_flag         = sps->transform_skip_rotation_enabled_flag,
 137             .transform_skip_context_enabled_flag          = sps->transform_skip_context_enabled_flag,
 138             .implicit_rdpcm_enabled_flag                  = sps->implicit_rdpcm_enabled_flag,
 139             .explicit_rdpcm_enabled_flag                  = sps->explicit_rdpcm_enabled_flag,
 140             .extended_precision_processing_flag           = sps->extended_precision_processing_flag,
 141             .intra_smoothing_disabled_flag                = sps->intra_smoothing_disabled_flag,
 142             .persistent_rice_adaptation_enabled_flag      = sps->persistent_rice_adaptation_enabled_flag,
 143             .cabac_bypass_alignment_enabled_flag          = sps->cabac_bypass_alignment_enabled_flag,
 144 #endif
 145
 146             .dependent_slice_segments_enabled_flag        = pps->dependent_slice_segments_enabled_flag,
 147             .slice_segment_header_extension_present_flag  = pps->slice_header_extension_present_flag,
 148             .sign_data_hiding_enabled_flag                = pps->sign_data_hiding_flag,
 149             .cu_qp_delta_enabled_flag                     = pps->cu_qp_delta_enabled_flag,
 150             .diff_cu_qp_delta_depth                       = pps->diff_cu_qp_delta_depth,
 151             .init_qp_minus26                              = pps->pic_init_qp_minus26,
 152             .pps_cb_qp_offset                             = pps->cb_qp_offset,
 153             .pps_cr_qp_offset                             = pps->cr_qp_offset,
 154             .constrained_intra_pred_flag                  = pps->constrained_intra_pred_flag,
 155             .weighted_pred_flag                           = pps->weighted_pred_flag,
 156             .weighted_bipred_flag                         = pps->weighted_bipred_flag,
 157             .transform_skip_enabled_flag                  = pps->transform_skip_enabled_flag,
 158             .transquant_bypass_enabled_flag               = pps->transquant_bypass_enable_flag,
 159             .entropy_coding_sync_enabled_flag             = pps->entropy_coding_sync_enabled_flag,
 160             .log2_parallel_merge_level_minus2             = pps->log2_parallel_merge_level - 2,
 161             .num_extra_slice_header_bits                  = pps->num_extra_slice_header_bits,
 162             .loop_filter_across_tiles_enabled_flag        = pps->loop_filter_across_tiles_enabled_flag,
 163             .loop_filter_across_slices_enabled_flag       = pps->seq_loop_filter_across_slices_enabled_flag,
 164             .output_flag_present_flag                     = pps->output_flag_present_flag,
 165             .num_ref_idx_l0_default_active_minus1         = pps->num_ref_idx_l0_default_active - 1,
 166             .num_ref_idx_l1_default_active_minus1         = pps->num_ref_idx_l1_default_active - 1,
 167             .lists_modification_present_flag              = pps->lists_modification_present_flag,
 168             .cabac_init_present_flag                      = pps->cabac_init_present_flag,
 169             .pps_slice_chroma_qp_offsets_present_flag     = pps->pic_slice_level_chroma_qp_offsets_present_flag,
 170             .deblocking_filter_override_enabled_flag      = pps->deblocking_filter_override_enabled_flag,
 171             .pps_deblocking_filter_disabled_flag          = pps->disable_dbf,
 172             .pps_beta_offset_div2                         = pps->beta_offset / 2,
 173             .pps_tc_offset_div2                           = pps->tc_offset / 2,
 174             .tiles_enabled_flag                           = pps->tiles_enabled_flag,
 175             .uniform_spacing_flag                         = pps->uniform_spacing_flag,
 176             .num_tile_columns_minus1                      = pps->num_tile_columns - 1,
 177             .num_tile_rows_minus1                         = pps->num_tile_rows - 1,
 178 #if NVDECAPI_CHECK_VERSION(9, 0)
 179             .pps_range_extension_flag                     = pps->pps_range_extensions_flag,
 180             .cross_component_prediction_enabled_flag      = pps->cross_component_prediction_enabled_flag,
 181             .chroma_qp_offset_list_enabled_flag           = pps->chroma_qp_offset_list_enabled_flag,
 182             .diff_cu_chroma_qp_offset_depth               = pps->diff_cu_chroma_qp_offset_depth,
 183             .chroma_qp_offset_list_len_minus1             = pps->chroma_qp_offset_list_len_minus1,
 184 #endif
 185
 186             .NumBitsForShortTermRPSInSlice                = s->sh.short_term_rps ? s->sh.short_term_ref_pic_set_size : 0,
 187             .NumDeltaPocsOfRefRpsIdx                      = s->sh.short_term_rps ? s->sh.short_term_rps->rps_idx_num_delta_pocs : 0,
 188             .NumPocTotalCurr                              = ff_hevc_frame_nb_refs(s),
 189             .NumPocStCurrBefore                           = s->rps[ST_CURR_BEF].nb_refs,
 190             .NumPocStCurrAfter                            = s->rps[ST_CURR_AFT].nb_refs,
 191             .NumPocLtCurr                                 = s->rps[LT_CURR].nb_refs,
 192             .CurrPicOrderCntVal                           = s->ref->poc,
 193         },
 194     };
 195
 196     if (pps->num_tile_columns > FF_ARRAY_ELEMS(ppc->column_width_minus1) ||
 197         pps->num_tile_rows    > FF_ARRAY_ELEMS(ppc->row_height_minus1)) {
 198         av_log(avctx, AV_LOG_ERROR, "Too many tiles\n");
 199         return AVERROR(ENOSYS);
 200     }
 201     for (i = 0; i < pps->num_tile_columns; i++)
 202         ppc->column_width_minus1[i] = pps->column_width[i] - 1;
 203     for (i = 0; i < pps->num_tile_rows; i++)
 204         ppc->row_height_minus1[i] = pps->row_height[i] - 1;
 205
 206 #if NVDECAPI_CHECK_VERSION(9, 0)
 207     if (pps->chroma_qp_offset_list_len_minus1 > FF_ARRAY_ELEMS(ppc->cb_qp_offset_list) ||
 208         pps->chroma_qp_offset_list_len_minus1 > FF_ARRAY_ELEMS(ppc->cr_qp_offset_list)) {
 209         av_log(avctx, AV_LOG_ERROR, "Too many chroma_qp_offsets\n");
 210         return AVERROR(ENOSYS);
 211     }
 212     for (i = 0; i <= pps->chroma_qp_offset_list_len_minus1; i++) {
 213         ppc->cb_qp_offset_list[i] = pps->cb_qp_offset_list[i];
 214         ppc->cr_qp_offset_list[i] = pps->cr_qp_offset_list[i];
 215     }
 216 #endif
 217
 218     if (s->rps[LT_CURR].nb_refs     > FF_ARRAY_ELEMS(ppc->RefPicSetLtCurr)       ||
 219         s->rps[ST_CURR_BEF].nb_refs > FF_ARRAY_ELEMS(ppc->RefPicSetStCurrBefore) ||
 220         s->rps[ST_CURR_AFT].nb_refs > FF_ARRAY_ELEMS(ppc->RefPicSetStCurrAfter)) {
 221         av_log(avctx, AV_LOG_ERROR, "Too many reference frames\n");
 222         return AVERROR(ENOSYS);
 223     }
 224
 225     dpb_size = 0;
 226     for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
 227         const HEVCFrame *ref = &s->DPB[i];
 228         if (!(ref->flags & (HEVC_FRAME_FLAG_SHORT_REF | HEVC_FRAME_FLAG_LONG_REF)))
 229             continue;
 230         if (dpb_size >= FF_ARRAY_ELEMS(ppc->RefPicIdx)) {
 231             av_log(avctx, AV_LOG_ERROR, "Too many reference frames\n");
 232             return AVERROR_INVALIDDATA;
 233         }
 234         dpb_add(ppc, dpb_size++, ref);
 235
 236     }
 237     for (i = dpb_size; i < FF_ARRAY_ELEMS(ppc->RefPicIdx); i++)
 238         ppc->RefPicIdx[i] = -1;
 239
 240     for (i = 0; i < s->rps[ST_CURR_BEF].nb_refs; i++) {
 241         for (j = 0; j < dpb_size; j++) {
 242             if (ppc->PicOrderCntVal[j] == s->rps[ST_CURR_BEF].list[i]) {
 243                 ppc->RefPicSetStCurrBefore[i] = j;
 244                 break;
 245             }
 246         }
 247     }
 248     for (i = 0; i < s->rps[ST_CURR_AFT].nb_refs; i++) {
 249         for (j = 0; j < dpb_size; j++) {
 250             if (ppc->PicOrderCntVal[j] == s->rps[ST_CURR_AFT].list[i]) {
 251                 ppc->RefPicSetStCurrAfter[i] = j;
 252                 break;
 253             }
 254         }
 255     }
 256     for (i = 0; i < s->rps[LT_CURR].nb_refs; i++) {
 257         for (j = 0; j < dpb_size; j++) {
 258             if (ppc->PicOrderCntVal[j] == s->rps[LT_CURR].list[i]) {
 259                 ppc->RefPicSetLtCurr[i] = j;
 260                 break;
 261             }
 262         }
 263     }
 264
 265     fill_scaling_lists(ppc, s);
 266
 267     return 0;
 268 }
 269
 270 static int nvdec_hevc_decode_slice(AVCodecContext *avctx, const uint8_t *buffer,
 271                                    uint32_t size)
 272 {
 273     NVDECContext *ctx = avctx->internal->hwaccel_priv_data;
 274     void *tmp;
 275
 276     tmp = av_fast_realloc(ctx->bitstream, &ctx->bitstream_allocated,
 277                           ctx->bitstream_len + size + 3);
 278     if (!tmp)
 279         return AVERROR(ENOMEM);
 280     ctx->bitstream = tmp;
 281
 282     tmp = av_fast_realloc(ctx->slice_offsets, &ctx->slice_offsets_allocated,
 283                           (ctx->nb_slices + 1) * sizeof(*ctx->slice_offsets));
 284     if (!tmp)
 285         return AVERROR(ENOMEM);
 286     ctx->slice_offsets = tmp;
 287
 288     AV_WB24(ctx->bitstream + ctx->bitstream_len, 1);
 289     memcpy(ctx->bitstream + ctx->bitstream_len + 3, buffer, size);
 290     ctx->slice_offsets[ctx->nb_slices] = ctx->bitstream_len ;
 291     ctx->bitstream_len += size + 3;
 292     ctx->nb_slices++;
 293
 294     return 0;
 295 }
 296
 297 static int nvdec_hevc_frame_params(AVCodecContext *avctx,
 298                                    AVBufferRef *hw_frames_ctx)
 299 {
 300     const HEVCContext *s = avctx->priv_data;
 301     const HEVCSPS *sps = s->ps.sps;
 302     return ff_nvdec_frame_params(avctx, hw_frames_ctx, sps->temporal_layer[sps->max_sub_layers - 1].max_dec_pic_buffering + 1, 1);
 303 }
 304
 305 static int nvdec_hevc_decode_init(AVCodecContext *avctx) {
 306     NVDECContext *ctx = avctx->internal->hwaccel_priv_data;
 307     ctx->supports_444 = 1;
 308     return ff_nvdec_decode_init(avctx);
 309 }
 310
 311 const AVHWAccel ff_hevc_nvdec_hwaccel = {
 312     .name                 = "hevc_nvdec",
 313     .type                 = AVMEDIA_TYPE_VIDEO,
 314     .id                   = AV_CODEC_ID_HEVC,
 315     .pix_fmt              = AV_PIX_FMT_CUDA,
 316     .start_frame          = nvdec_hevc_start_frame,
 317     .end_frame            = ff_nvdec_end_frame,
 318     .decode_slice         = nvdec_hevc_decode_slice,
 319     .frame_params         = nvdec_hevc_frame_params,
 320     .init                 = nvdec_hevc_decode_init,
 321     .uninit               = ff_nvdec_decode_uninit,
 322     .priv_data_size       = sizeof(NVDECContext),
 323 };