376 lines
17 KiB
C
376 lines
17 KiB
C
/*
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* DXVA2 HEVC HW acceleration.
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*
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* copyright (c) 2014 - 2015 Hendrik Leppkes
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/avassert.h"
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#include "dxva2_internal.h"
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#include "hevc.h"
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#define MAX_SLICES 256
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struct hevc_dxva2_picture_context {
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DXVA_PicParams_HEVC pp;
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DXVA_Qmatrix_HEVC qm;
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unsigned slice_count;
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DXVA_Slice_HEVC_Short slice_short[MAX_SLICES];
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const uint8_t *bitstream;
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unsigned bitstream_size;
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};
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static void fill_picture_entry(DXVA_PicEntry_HEVC *pic,
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unsigned index, unsigned flag)
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{
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av_assert0((index & 0x7f) == index && (flag & 0x01) == flag);
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pic->bPicEntry = index | (flag << 7);
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}
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static int get_refpic_index(const DXVA_PicParams_HEVC *pp, int surface_index)
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{
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int i;
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for (i = 0; i < FF_ARRAY_ELEMS(pp->RefPicList); i++) {
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if ((pp->RefPicList[i].bPicEntry & 0x7f) == surface_index)
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return i;
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}
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return 0xff;
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}
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static void fill_picture_parameters(struct dxva_context *ctx, const HEVCContext *h,
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DXVA_PicParams_HEVC *pp)
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{
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const HEVCFrame *current_picture = h->ref;
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int i, j, k;
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memset(pp, 0, sizeof(*pp));
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pp->PicWidthInMinCbsY = h->sps->min_cb_width;
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pp->PicHeightInMinCbsY = h->sps->min_cb_height;
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pp->wFormatAndSequenceInfoFlags = (h->sps->chroma_format_idc << 0) |
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(h->sps->separate_colour_plane_flag << 2) |
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((h->sps->bit_depth - 8) << 3) |
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((h->sps->bit_depth - 8) << 6) |
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((h->sps->log2_max_poc_lsb - 4) << 9) |
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(0 << 13) |
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(0 << 14) |
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(0 << 15);
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fill_picture_entry(&pp->CurrPic, ff_dxva2_get_surface_index(ctx, current_picture->frame), 0);
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pp->sps_max_dec_pic_buffering_minus1 = h->sps->temporal_layer[h->sps->max_sub_layers - 1].max_dec_pic_buffering - 1;
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pp->log2_min_luma_coding_block_size_minus3 = h->sps->log2_min_cb_size - 3;
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pp->log2_diff_max_min_luma_coding_block_size = h->sps->log2_diff_max_min_coding_block_size;
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pp->log2_min_transform_block_size_minus2 = h->sps->log2_min_tb_size - 2;
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pp->log2_diff_max_min_transform_block_size = h->sps->log2_max_trafo_size - h->sps->log2_min_tb_size;
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pp->max_transform_hierarchy_depth_inter = h->sps->max_transform_hierarchy_depth_inter;
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pp->max_transform_hierarchy_depth_intra = h->sps->max_transform_hierarchy_depth_intra;
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pp->num_short_term_ref_pic_sets = h->sps->nb_st_rps;
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pp->num_long_term_ref_pics_sps = h->sps->num_long_term_ref_pics_sps;
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pp->num_ref_idx_l0_default_active_minus1 = h->pps->num_ref_idx_l0_default_active - 1;
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pp->num_ref_idx_l1_default_active_minus1 = h->pps->num_ref_idx_l1_default_active - 1;
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pp->init_qp_minus26 = h->pps->pic_init_qp_minus26;
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if (h->sh.short_term_ref_pic_set_sps_flag == 0 && h->sh.short_term_rps) {
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pp->ucNumDeltaPocsOfRefRpsIdx = h->sh.short_term_rps->num_delta_pocs;
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pp->wNumBitsForShortTermRPSInSlice = h->sh.short_term_ref_pic_set_size;
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}
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pp->dwCodingParamToolFlags = (h->sps->scaling_list_enable_flag << 0) |
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(h->sps->amp_enabled_flag << 1) |
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(h->sps->sao_enabled << 2) |
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(h->sps->pcm_enabled_flag << 3) |
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((h->sps->pcm_enabled_flag ? (h->sps->pcm.bit_depth - 1) : 0) << 4) |
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((h->sps->pcm_enabled_flag ? (h->sps->pcm.bit_depth_chroma - 1) : 0) << 8) |
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((h->sps->pcm_enabled_flag ? (h->sps->pcm.log2_min_pcm_cb_size - 3) : 0) << 12) |
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((h->sps->pcm_enabled_flag ? (h->sps->pcm.log2_max_pcm_cb_size - h->sps->pcm.log2_min_pcm_cb_size) : 0) << 14) |
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(h->sps->pcm.loop_filter_disable_flag << 16) |
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(h->sps->long_term_ref_pics_present_flag << 17) |
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(h->sps->sps_temporal_mvp_enabled_flag << 18) |
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(h->sps->sps_strong_intra_smoothing_enable_flag << 19) |
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(h->pps->dependent_slice_segments_enabled_flag << 20) |
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(h->pps->output_flag_present_flag << 21) |
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(h->pps->num_extra_slice_header_bits << 22) |
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(h->pps->sign_data_hiding_flag << 25) |
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(h->pps->cabac_init_present_flag << 26) |
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(0 << 27);
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pp->dwCodingSettingPicturePropertyFlags = (h->pps->constrained_intra_pred_flag << 0) |
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(h->pps->transform_skip_enabled_flag << 1) |
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(h->pps->cu_qp_delta_enabled_flag << 2) |
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(h->pps->pic_slice_level_chroma_qp_offsets_present_flag << 3) |
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(h->pps->weighted_pred_flag << 4) |
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(h->pps->weighted_bipred_flag << 5) |
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(h->pps->transquant_bypass_enable_flag << 6) |
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(h->pps->tiles_enabled_flag << 7) |
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(h->pps->entropy_coding_sync_enabled_flag << 8) |
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(h->pps->uniform_spacing_flag << 9) |
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((h->pps->tiles_enabled_flag ? h->pps->loop_filter_across_tiles_enabled_flag : 0) << 10) |
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(h->pps->seq_loop_filter_across_slices_enabled_flag << 11) |
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(h->pps->deblocking_filter_override_enabled_flag << 12) |
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(h->pps->disable_dbf << 13) |
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(h->pps->lists_modification_present_flag << 14) |
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(h->pps->slice_header_extension_present_flag << 15) |
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(IS_IRAP(h) << 16) |
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(IS_IDR(h) << 17) |
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/* IntraPicFlag */
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(IS_IRAP(h) << 18) |
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(0 << 19);
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pp->pps_cb_qp_offset = h->pps->cb_qp_offset;
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pp->pps_cr_qp_offset = h->pps->cr_qp_offset;
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if (h->pps->tiles_enabled_flag) {
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pp->num_tile_columns_minus1 = h->pps->num_tile_columns - 1;
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pp->num_tile_rows_minus1 = h->pps->num_tile_rows - 1;
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if (!h->pps->uniform_spacing_flag) {
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for (i = 0; i < h->pps->num_tile_columns; i++)
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pp->column_width_minus1[i] = h->pps->column_width[i] - 1;
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for (i = 0; i < h->pps->num_tile_rows; i++)
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pp->row_height_minus1[i] = h->pps->row_height[i] - 1;
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}
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}
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pp->diff_cu_qp_delta_depth = h->pps->diff_cu_qp_delta_depth;
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pp->pps_beta_offset_div2 = h->pps->beta_offset / 2;
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pp->pps_tc_offset_div2 = h->pps->tc_offset / 2;
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pp->log2_parallel_merge_level_minus2 = h->pps->log2_parallel_merge_level - 2;
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pp->CurrPicOrderCntVal = h->poc;
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// empty the lists
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memset(&pp->RefPicList, 0xff, sizeof(pp->RefPicList));
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memset(&pp->RefPicSetStCurrBefore, 0xff, sizeof(pp->RefPicSetStCurrBefore));
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memset(&pp->RefPicSetStCurrAfter, 0xff, sizeof(pp->RefPicSetStCurrAfter));
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memset(&pp->RefPicSetLtCurr, 0xff, sizeof(pp->RefPicSetLtCurr));
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// fill RefPicList from the DPB
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for (i = 0, j = 0; i < FF_ARRAY_ELEMS(h->DPB); i++) {
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const HEVCFrame *frame = &h->DPB[i];
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if (frame != current_picture && (frame->flags & (HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF))) {
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fill_picture_entry(&pp->RefPicList[j], ff_dxva2_get_surface_index(ctx, frame->frame), !!(frame->flags & HEVC_FRAME_FLAG_LONG_REF));
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pp->PicOrderCntValList[j] = frame->poc;
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j++;
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}
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}
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#define DO_REF_LIST(ref_idx, ref_list) { \
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const RefPicList *rpl = &h->rps[ref_idx]; \
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av_assert0(rpl->nb_refs <= FF_ARRAY_ELEMS(pp->ref_list)); \
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for (j = 0, k = 0; j < rpl->nb_refs; j++) { \
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if (rpl->ref[j]) { \
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pp->ref_list[k] = get_refpic_index(pp, ff_dxva2_get_surface_index(ctx, rpl->ref[j]->frame)); \
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k++; \
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} \
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} \
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}
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// Fill short term and long term lists
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DO_REF_LIST(ST_CURR_BEF, RefPicSetStCurrBefore);
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DO_REF_LIST(ST_CURR_AFT, RefPicSetStCurrAfter);
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DO_REF_LIST(LT_CURR, RefPicSetLtCurr);
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pp->StatusReportFeedbackNumber = 1 + ctx->report_id++;
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}
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static void fill_scaling_lists(struct dxva_context *ctx, const HEVCContext *h, DXVA_Qmatrix_HEVC *qm)
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{
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unsigned i, j;
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memset(qm, 0, sizeof(*qm));
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for (i = 0; i < 6; i++) {
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for (j = 0; j < 16; j++)
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qm->ucScalingLists0[i][j] = h->pps->scaling_list.sl[0][i][j];
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for (j = 0; j < 64; j++) {
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qm->ucScalingLists1[i][j] = h->pps->scaling_list.sl[1][i][j];
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qm->ucScalingLists2[i][j] = h->pps->scaling_list.sl[2][i][j];
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if (i < 2)
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qm->ucScalingLists3[i][j] = h->pps->scaling_list.sl[3][i][j];
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}
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qm->ucScalingListDCCoefSizeID2[i] = h->pps->scaling_list.sl_dc[0][i];
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if (i < 2)
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qm->ucScalingListDCCoefSizeID3[i] = h->pps->scaling_list.sl_dc[1][i];
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}
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}
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static void fill_slice_short(DXVA_Slice_HEVC_Short *slice,
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unsigned position, unsigned size)
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{
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memset(slice, 0, sizeof(*slice));
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slice->BSNALunitDataLocation = position;
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slice->SliceBytesInBuffer = size;
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slice->wBadSliceChopping = 0;
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}
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static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
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DXVA2_DecodeBufferDesc *bs,
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DXVA2_DecodeBufferDesc *sc)
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{
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const HEVCContext *h = avctx->priv_data;
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struct dxva_context *ctx = avctx->hwaccel_context;
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const HEVCFrame *current_picture = h->ref;
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struct hevc_dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
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DXVA_Slice_HEVC_Short *slice = NULL;
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void *dxva_data_ptr;
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uint8_t *dxva_data, *current, *end;
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unsigned dxva_size;
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void *slice_data;
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unsigned slice_size;
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unsigned padding;
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unsigned i;
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/* Create an annex B bitstream buffer with only slice NAL and finalize slice */
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if (FAILED(IDirectXVideoDecoder_GetBuffer(ctx->decoder,
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DXVA2_BitStreamDateBufferType,
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&dxva_data_ptr, &dxva_size)))
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return -1;
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dxva_data = dxva_data_ptr;
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current = dxva_data;
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end = dxva_data + dxva_size;
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for (i = 0; i < ctx_pic->slice_count; i++) {
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static const uint8_t start_code[] = { 0, 0, 1 };
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static const unsigned start_code_size = sizeof(start_code);
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unsigned position, size;
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slice = &ctx_pic->slice_short[i];
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position = slice->BSNALunitDataLocation;
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size = slice->SliceBytesInBuffer;
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if (start_code_size + size > end - current) {
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av_log(avctx, AV_LOG_ERROR, "Failed to build bitstream");
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break;
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}
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slice->BSNALunitDataLocation = current - dxva_data;
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slice->SliceBytesInBuffer = start_code_size + size;
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memcpy(current, start_code, start_code_size);
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current += start_code_size;
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memcpy(current, &ctx_pic->bitstream[position], size);
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current += size;
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}
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padding = FFMIN(128 - ((current - dxva_data) & 127), end - current);
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if (slice && padding > 0) {
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memset(current, 0, padding);
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current += padding;
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slice->SliceBytesInBuffer += padding;
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}
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if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(ctx->decoder,
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DXVA2_BitStreamDateBufferType)))
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return -1;
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if (i < ctx_pic->slice_count)
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return -1;
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memset(bs, 0, sizeof(*bs));
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bs->CompressedBufferType = DXVA2_BitStreamDateBufferType;
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bs->DataSize = current - dxva_data;
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bs->NumMBsInBuffer = 0;
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slice_data = ctx_pic->slice_short;
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slice_size = ctx_pic->slice_count * sizeof(*ctx_pic->slice_short);
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av_assert0((bs->DataSize & 127) == 0);
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return ff_dxva2_commit_buffer(avctx, ctx, sc,
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DXVA2_SliceControlBufferType,
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slice_data, slice_size, 0);
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}
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static int dxva2_hevc_start_frame(AVCodecContext *avctx,
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av_unused const uint8_t *buffer,
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av_unused uint32_t size)
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{
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const HEVCContext *h = avctx->priv_data;
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struct dxva_context *ctx = avctx->hwaccel_context;
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struct hevc_dxva2_picture_context *ctx_pic = h->ref->hwaccel_picture_private;
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if (!ctx->decoder || !ctx->cfg || ctx->surface_count <= 0)
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return -1;
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av_assert0(ctx_pic);
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/* Fill up DXVA_PicParams_HEVC */
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fill_picture_parameters(ctx, h, &ctx_pic->pp);
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/* Fill up DXVA_Qmatrix_HEVC */
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fill_scaling_lists(ctx, h, &ctx_pic->qm);
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ctx_pic->slice_count = 0;
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ctx_pic->bitstream_size = 0;
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ctx_pic->bitstream = NULL;
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return 0;
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}
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static int dxva2_hevc_decode_slice(AVCodecContext *avctx,
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const uint8_t *buffer,
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uint32_t size)
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{
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const HEVCContext *h = avctx->priv_data;
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const HEVCFrame *current_picture = h->ref;
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struct hevc_dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
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unsigned position;
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if (ctx_pic->slice_count >= MAX_SLICES)
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return -1;
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if (!ctx_pic->bitstream)
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ctx_pic->bitstream = buffer;
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ctx_pic->bitstream_size += size;
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position = buffer - ctx_pic->bitstream;
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fill_slice_short(&ctx_pic->slice_short[ctx_pic->slice_count], position, size);
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ctx_pic->slice_count++;
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return 0;
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}
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static int dxva2_hevc_end_frame(AVCodecContext *avctx)
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{
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HEVCContext *h = avctx->priv_data;
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struct hevc_dxva2_picture_context *ctx_pic = h->ref->hwaccel_picture_private;
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int scale = ctx_pic->pp.dwCodingParamToolFlags & 1;
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int ret;
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if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0)
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return -1;
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ret = ff_dxva2_common_end_frame(avctx, h->ref->frame,
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&ctx_pic->pp, sizeof(ctx_pic->pp),
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scale ? &ctx_pic->qm : NULL, scale ? sizeof(ctx_pic->qm) : 0,
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commit_bitstream_and_slice_buffer);
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return ret;
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}
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AVHWAccel ff_hevc_dxva2_hwaccel = {
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.name = "hevc_dxva2",
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.type = AVMEDIA_TYPE_VIDEO,
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.id = AV_CODEC_ID_HEVC,
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.pix_fmt = AV_PIX_FMT_DXVA2_VLD,
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.start_frame = dxva2_hevc_start_frame,
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.decode_slice = dxva2_hevc_decode_slice,
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.end_frame = dxva2_hevc_end_frame,
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.frame_priv_data_size = sizeof(struct hevc_dxva2_picture_context),
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};
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