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437 lines
18 KiB
437 lines
18 KiB
/* |
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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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|
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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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|
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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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|
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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 MpegEncContext *s = &h->s; |
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const Picture *current_picture = s->current_picture_ptr; |
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int i; |
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|
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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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s->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; i < FF_ARRAY_ELEMS(pp->RefFrameList); i++) { |
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if (i < h->short_ref_count + h->long_ref_count) { |
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const Picture *r; |
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if (i < h->short_ref_count) { |
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r = h->short_ref[i]; |
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assert(!r->long_ref); |
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} else { |
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r = h->long_ref[i - h->short_ref_count]; |
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assert(r->long_ref); |
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} |
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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 = s->mb_width - 1; |
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pp->wFrameHeightInMbsMinus1 = s->mb_height - 1; |
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pp->num_ref_frames = h->sps.ref_frame_count; |
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pp->wBitFields = ((s->picture_structure != PICT_FRAME) << 0) | |
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(h->sps.mb_aff << 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 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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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 ((s->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 ((s->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(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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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 < 2; i++) |
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for (j = 0; j < 64; j++) |
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qm->bScalingLists8x8[i][j] = h->pps.scaling_matrix8[i][ff_zigzag_direct[j]]; |
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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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H264Context *h = avctx->priv_data; /* FIXME Can't use const because of get_bits_count */ |
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struct dxva_context *ctx = avctx->hwaccel_context; |
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MpegEncContext *s = &h->s; |
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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 = (s->mb_y >> FIELD_OR_MBAFF_PICTURE) * s->mb_width + s->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(&s->gb) + 8; |
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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[list][i]; |
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o = h->luma_offset[list][i]; |
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} else if (plane >= 1 && h->chroma_weight_flag[list]) { |
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w = h->chroma_weight[list][i][plane-1]; |
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o = h->chroma_offset[list][i][plane-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 = s->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 == FF_B_TYPE) |
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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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H264Context *h = avctx->priv_data; |
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MpegEncContext *s = &h->s; |
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const unsigned mb_count = s->mb_width * s->mb_height; |
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struct dxva_context *ctx = avctx->hwaccel_context; |
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const Picture *current_picture = h->s.current_picture_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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&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 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->s.current_picture_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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|
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/* Fill up DXVA_Qmatrix_H264 */ |
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fill_scaling_lists(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 decode_slice(AVCodecContext *avctx, |
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const uint8_t *buffer, uint32_t size) |
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{ |
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H264Context *h = avctx->priv_data; /* FIXME Can't use const because of get_bits_count */ |
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struct dxva_context *ctx = avctx->hwaccel_context; |
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const Picture *current_picture = h->s.current_picture_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], |
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position, size); |
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else |
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fill_slice_long(avctx, &ctx_pic->slice_long[ctx_pic->slice_count], |
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position, size); |
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ctx_pic->slice_count++; |
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if (h->slice_type != FF_I_TYPE && h->slice_type != FF_SI_TYPE) |
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ctx_pic->pp.wBitFields &= ~(1 << 15); /* Set IntraPicFlag to 0 */ |
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return 0; |
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} |
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static int end_frame(AVCodecContext *avctx) |
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{ |
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H264Context *h = avctx->priv_data; |
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MpegEncContext *s = &h->s; |
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struct dxva2_picture_context *ctx_pic = |
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h->s.current_picture_ptr->hwaccel_picture_private; |
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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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return ff_dxva2_common_end_frame(avctx, s, |
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&ctx_pic->pp, sizeof(ctx_pic->pp), |
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&ctx_pic->qm, sizeof(ctx_pic->qm), |
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commit_bitstream_and_slice_buffer); |
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} |
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AVHWAccel h264_dxva2_hwaccel = { |
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.name = "h264_dxva2", |
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.type = CODEC_TYPE_VIDEO, |
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.id = CODEC_ID_H264, |
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.pix_fmt = PIX_FMT_DXVA2_VLD, |
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.capabilities = 0, |
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.start_frame = start_frame, |
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.decode_slice = decode_slice, |
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.end_frame = end_frame, |
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.priv_data_size = sizeof(struct dxva2_picture_context), |
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}; |
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