forked from KolibriOS/kolibrios
453 lines
19 KiB
C
453 lines
19 KiB
C
/*
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* DXVA2 H264 HW acceleration.
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*
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* copyright (c) 2009 Laurent Aimar
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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 "dxva2_internal.h"
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#include "h264.h"
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#include "h264data.h"
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struct dxva2_picture_context {
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DXVA_PicParams_H264 pp;
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DXVA_Qmatrix_H264 qm;
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unsigned slice_count;
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DXVA_Slice_H264_Short slice_short[MAX_SLICES];
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DXVA_Slice_H264_Long slice_long[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_H264 *pic,
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unsigned index, unsigned flag)
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{
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assert((index&0x7f) == index && (flag&0x01) == flag);
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pic->bPicEntry = index | (flag << 7);
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}
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static void fill_picture_parameters(struct dxva_context *ctx, const H264Context *h,
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DXVA_PicParams_H264 *pp)
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{
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const Picture *current_picture = h->cur_pic_ptr;
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int i, j;
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memset(pp, 0, sizeof(*pp));
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/* Configure current picture */
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fill_picture_entry(&pp->CurrPic,
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ff_dxva2_get_surface_index(ctx, current_picture),
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h->picture_structure == PICT_BOTTOM_FIELD);
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/* Configure the set of references */
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pp->UsedForReferenceFlags = 0;
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pp->NonExistingFrameFlags = 0;
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for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->RefFrameList); i++) {
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const Picture *r;
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if (j < h->short_ref_count) {
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r = h->short_ref[j++];
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} else {
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r = NULL;
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while (!r && j < h->short_ref_count + 16)
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r = h->long_ref[j++ - h->short_ref_count];
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}
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if (r) {
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fill_picture_entry(&pp->RefFrameList[i],
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ff_dxva2_get_surface_index(ctx, r),
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r->long_ref != 0);
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if ((r->reference & PICT_TOP_FIELD) && r->field_poc[0] != INT_MAX)
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pp->FieldOrderCntList[i][0] = r->field_poc[0];
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if ((r->reference & PICT_BOTTOM_FIELD) && r->field_poc[1] != INT_MAX)
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pp->FieldOrderCntList[i][1] = r->field_poc[1];
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pp->FrameNumList[i] = r->long_ref ? r->pic_id : r->frame_num;
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if (r->reference & PICT_TOP_FIELD)
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pp->UsedForReferenceFlags |= 1 << (2*i + 0);
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if (r->reference & PICT_BOTTOM_FIELD)
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pp->UsedForReferenceFlags |= 1 << (2*i + 1);
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} else {
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pp->RefFrameList[i].bPicEntry = 0xff;
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pp->FieldOrderCntList[i][0] = 0;
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pp->FieldOrderCntList[i][1] = 0;
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pp->FrameNumList[i] = 0;
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}
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}
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pp->wFrameWidthInMbsMinus1 = h->mb_width - 1;
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pp->wFrameHeightInMbsMinus1 = h->mb_height - 1;
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pp->num_ref_frames = h->sps.ref_frame_count;
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pp->wBitFields = ((h->picture_structure != PICT_FRAME) << 0) |
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((h->sps.mb_aff &&
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(h->picture_structure == PICT_FRAME)) << 1) |
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(h->sps.residual_color_transform_flag << 2) |
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/* sp_for_switch_flag (not implemented by FFmpeg) */
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(0 << 3) |
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(h->sps.chroma_format_idc << 4) |
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((h->nal_ref_idc != 0) << 6) |
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(h->pps.constrained_intra_pred << 7) |
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(h->pps.weighted_pred << 8) |
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(h->pps.weighted_bipred_idc << 9) |
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/* MbsConsecutiveFlag */
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(1 << 11) |
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(h->sps.frame_mbs_only_flag << 12) |
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(h->pps.transform_8x8_mode << 13) |
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((h->sps.level_idc >= 31) << 14) |
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/* IntraPicFlag (Modified if we detect a non
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* intra slice in dxva2_h264_decode_slice) */
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(1 << 15);
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pp->bit_depth_luma_minus8 = h->sps.bit_depth_luma - 8;
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pp->bit_depth_chroma_minus8 = h->sps.bit_depth_chroma - 8;
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if (ctx->workaround & FF_DXVA2_WORKAROUND_SCALING_LIST_ZIGZAG)
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pp->Reserved16Bits = 0;
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else
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pp->Reserved16Bits = 3; /* FIXME is there a way to detect the right mode ? */
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pp->StatusReportFeedbackNumber = 1 + ctx->report_id++;
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pp->CurrFieldOrderCnt[0] = 0;
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if ((h->picture_structure & PICT_TOP_FIELD) &&
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current_picture->field_poc[0] != INT_MAX)
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pp->CurrFieldOrderCnt[0] = current_picture->field_poc[0];
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pp->CurrFieldOrderCnt[1] = 0;
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if ((h->picture_structure & PICT_BOTTOM_FIELD) &&
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current_picture->field_poc[1] != INT_MAX)
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pp->CurrFieldOrderCnt[1] = current_picture->field_poc[1];
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pp->pic_init_qs_minus26 = h->pps.init_qs - 26;
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pp->chroma_qp_index_offset = h->pps.chroma_qp_index_offset[0];
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pp->second_chroma_qp_index_offset = h->pps.chroma_qp_index_offset[1];
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pp->ContinuationFlag = 1;
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pp->pic_init_qp_minus26 = h->pps.init_qp - 26;
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pp->num_ref_idx_l0_active_minus1 = h->pps.ref_count[0] - 1;
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pp->num_ref_idx_l1_active_minus1 = h->pps.ref_count[1] - 1;
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pp->Reserved8BitsA = 0;
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pp->frame_num = h->frame_num;
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pp->log2_max_frame_num_minus4 = h->sps.log2_max_frame_num - 4;
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pp->pic_order_cnt_type = h->sps.poc_type;
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if (h->sps.poc_type == 0)
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pp->log2_max_pic_order_cnt_lsb_minus4 = h->sps.log2_max_poc_lsb - 4;
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else if (h->sps.poc_type == 1)
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pp->delta_pic_order_always_zero_flag = h->sps.delta_pic_order_always_zero_flag;
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pp->direct_8x8_inference_flag = h->sps.direct_8x8_inference_flag;
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pp->entropy_coding_mode_flag = h->pps.cabac;
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pp->pic_order_present_flag = h->pps.pic_order_present;
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pp->num_slice_groups_minus1 = h->pps.slice_group_count - 1;
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pp->slice_group_map_type = h->pps.mb_slice_group_map_type;
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pp->deblocking_filter_control_present_flag = h->pps.deblocking_filter_parameters_present;
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pp->redundant_pic_cnt_present_flag= h->pps.redundant_pic_cnt_present;
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pp->Reserved8BitsB = 0;
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pp->slice_group_change_rate_minus1= 0; /* XXX not implemented by FFmpeg */
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//pp->SliceGroupMap[810]; /* XXX not implemented by FFmpeg */
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}
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static void fill_scaling_lists(struct dxva_context *ctx, const H264Context *h, DXVA_Qmatrix_H264 *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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if (ctx->workaround & FF_DXVA2_WORKAROUND_SCALING_LIST_ZIGZAG) {
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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->bScalingLists4x4[i][j] = h->pps.scaling_matrix4[i][j];
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for (i = 0; i < 64; i++) {
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qm->bScalingLists8x8[0][i] = h->pps.scaling_matrix8[0][i];
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qm->bScalingLists8x8[1][i] = h->pps.scaling_matrix8[3][i];
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}
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} else {
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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->bScalingLists4x4[i][j] = h->pps.scaling_matrix4[i][zigzag_scan[j]];
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for (i = 0; i < 64; i++) {
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qm->bScalingLists8x8[0][i] = h->pps.scaling_matrix8[0][ff_zigzag_direct[i]];
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qm->bScalingLists8x8[1][i] = h->pps.scaling_matrix8[3][ff_zigzag_direct[i]];
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}
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}
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}
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static int is_slice_short(struct dxva_context *ctx)
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{
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assert(ctx->cfg->ConfigBitstreamRaw == 1 ||
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ctx->cfg->ConfigBitstreamRaw == 2);
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return ctx->cfg->ConfigBitstreamRaw == 2;
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}
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static void fill_slice_short(DXVA_Slice_H264_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 void fill_slice_long(AVCodecContext *avctx, DXVA_Slice_H264_Long *slice,
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unsigned position, unsigned size)
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{
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const H264Context *h = avctx->priv_data;
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struct dxva_context *ctx = avctx->hwaccel_context;
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unsigned list;
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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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slice->first_mb_in_slice = (h->mb_y >> FIELD_OR_MBAFF_PICTURE(h)) * h->mb_width + h->mb_x;
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slice->NumMbsForSlice = 0; /* XXX it is set once we have all slices */
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slice->BitOffsetToSliceData = get_bits_count(&h->gb);
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slice->slice_type = ff_h264_get_slice_type(h);
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if (h->slice_type_fixed)
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slice->slice_type += 5;
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slice->luma_log2_weight_denom = h->luma_log2_weight_denom;
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slice->chroma_log2_weight_denom = h->chroma_log2_weight_denom;
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if (h->list_count > 0)
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slice->num_ref_idx_l0_active_minus1 = h->ref_count[0] - 1;
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if (h->list_count > 1)
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slice->num_ref_idx_l1_active_minus1 = h->ref_count[1] - 1;
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slice->slice_alpha_c0_offset_div2 = h->slice_alpha_c0_offset / 2 - 26;
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slice->slice_beta_offset_div2 = h->slice_beta_offset / 2 - 26;
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slice->Reserved8Bits = 0;
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for (list = 0; list < 2; list++) {
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unsigned i;
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for (i = 0; i < FF_ARRAY_ELEMS(slice->RefPicList[list]); i++) {
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if (list < h->list_count && i < h->ref_count[list]) {
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const Picture *r = &h->ref_list[list][i];
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unsigned plane;
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fill_picture_entry(&slice->RefPicList[list][i],
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ff_dxva2_get_surface_index(ctx, r),
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r->reference == PICT_BOTTOM_FIELD);
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for (plane = 0; plane < 3; plane++) {
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int w, o;
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if (plane == 0 && h->luma_weight_flag[list]) {
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w = h->luma_weight[i][list][0];
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o = h->luma_weight[i][list][1];
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} else if (plane >= 1 && h->chroma_weight_flag[list]) {
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w = h->chroma_weight[i][list][plane-1][0];
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o = h->chroma_weight[i][list][plane-1][1];
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} else {
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w = 1 << (plane == 0 ? h->luma_log2_weight_denom :
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h->chroma_log2_weight_denom);
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o = 0;
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}
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slice->Weights[list][i][plane][0] = w;
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slice->Weights[list][i][plane][1] = o;
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}
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} else {
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unsigned plane;
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slice->RefPicList[list][i].bPicEntry = 0xff;
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for (plane = 0; plane < 3; plane++) {
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slice->Weights[list][i][plane][0] = 0;
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slice->Weights[list][i][plane][1] = 0;
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}
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}
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}
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}
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slice->slice_qs_delta = 0; /* XXX not implemented by FFmpeg */
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slice->slice_qp_delta = h->qscale - h->pps.init_qp;
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slice->redundant_pic_cnt = h->redundant_pic_count;
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if (h->slice_type == AV_PICTURE_TYPE_B)
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slice->direct_spatial_mv_pred_flag = h->direct_spatial_mv_pred;
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slice->cabac_init_idc = h->pps.cabac ? h->cabac_init_idc : 0;
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if (h->deblocking_filter < 2)
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slice->disable_deblocking_filter_idc = 1 - h->deblocking_filter;
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else
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slice->disable_deblocking_filter_idc = h->deblocking_filter;
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slice->slice_id = h->current_slice - 1;
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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 H264Context *h = avctx->priv_data;
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const unsigned mb_count = h->mb_width * h->mb_height;
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struct dxva_context *ctx = avctx->hwaccel_context;
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const Picture *current_picture = h->cur_pic_ptr;
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struct dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
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DXVA_Slice_H264_Short *slice = NULL;
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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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(void **)&dxva_data, &dxva_size)))
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return -1;
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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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assert(offsetof(DXVA_Slice_H264_Short, BSNALunitDataLocation) ==
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offsetof(DXVA_Slice_H264_Long, BSNALunitDataLocation));
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assert(offsetof(DXVA_Slice_H264_Short, SliceBytesInBuffer) ==
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offsetof(DXVA_Slice_H264_Long, SliceBytesInBuffer));
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if (is_slice_short(ctx))
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slice = &ctx_pic->slice_short[i];
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else
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slice = (DXVA_Slice_H264_Short*)&ctx_pic->slice_long[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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if (!is_slice_short(ctx)) {
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DXVA_Slice_H264_Long *slice_long = (DXVA_Slice_H264_Long*)slice;
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if (i < ctx_pic->slice_count - 1)
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slice_long->NumMbsForSlice =
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slice_long[1].first_mb_in_slice - slice_long[0].first_mb_in_slice;
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else
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slice_long->NumMbsForSlice = mb_count - slice_long->first_mb_in_slice;
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}
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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 = mb_count;
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if (is_slice_short(ctx)) {
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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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} else {
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slice_data = ctx_pic->slice_long;
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slice_size = ctx_pic->slice_count * sizeof(*ctx_pic->slice_long);
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}
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assert((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, mb_count);
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}
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static int dxva2_h264_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 H264Context *h = avctx->priv_data;
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struct dxva_context *ctx = avctx->hwaccel_context;
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struct dxva2_picture_context *ctx_pic = h->cur_pic_ptr->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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assert(ctx_pic);
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/* Fill up DXVA_PicParams_H264 */
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fill_picture_parameters(ctx, h, &ctx_pic->pp);
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/* Fill up DXVA_Qmatrix_H264 */
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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_h264_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 H264Context *h = avctx->priv_data;
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struct dxva_context *ctx = avctx->hwaccel_context;
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const Picture *current_picture = h->cur_pic_ptr;
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struct 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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if (is_slice_short(ctx))
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fill_slice_short(&ctx_pic->slice_short[ctx_pic->slice_count],
|
|
position, size);
|
|
else
|
|
fill_slice_long(avctx, &ctx_pic->slice_long[ctx_pic->slice_count],
|
|
position, size);
|
|
ctx_pic->slice_count++;
|
|
|
|
if (h->slice_type != AV_PICTURE_TYPE_I && h->slice_type != AV_PICTURE_TYPE_SI)
|
|
ctx_pic->pp.wBitFields &= ~(1 << 15); /* Set IntraPicFlag to 0 */
|
|
return 0;
|
|
}
|
|
|
|
static int dxva2_h264_end_frame(AVCodecContext *avctx)
|
|
{
|
|
H264Context *h = avctx->priv_data;
|
|
struct dxva2_picture_context *ctx_pic =
|
|
h->cur_pic_ptr->hwaccel_picture_private;
|
|
int ret;
|
|
|
|
if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0)
|
|
return -1;
|
|
ret = ff_dxva2_common_end_frame(avctx, h->cur_pic_ptr,
|
|
&ctx_pic->pp, sizeof(ctx_pic->pp),
|
|
&ctx_pic->qm, sizeof(ctx_pic->qm),
|
|
commit_bitstream_and_slice_buffer);
|
|
if (!ret)
|
|
ff_h264_draw_horiz_band(h, 0, h->avctx->height);
|
|
return ret;
|
|
}
|
|
|
|
AVHWAccel ff_h264_dxva2_hwaccel = {
|
|
.name = "h264_dxva2",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_H264,
|
|
.pix_fmt = AV_PIX_FMT_DXVA2_VLD,
|
|
.start_frame = dxva2_h264_start_frame,
|
|
.decode_slice = dxva2_h264_decode_slice,
|
|
.end_frame = dxva2_h264_end_frame,
|
|
.priv_data_size = sizeof(struct dxva2_picture_context),
|
|
};
|