/* * DXVA2 H264 HW acceleration. * * copyright (c) 2009 Laurent Aimar * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "dxva2_internal.h" #include "h264.h" #include "h264data.h" struct dxva2_picture_context { DXVA_PicParams_H264 pp; DXVA_Qmatrix_H264 qm; unsigned slice_count; DXVA_Slice_H264_Short slice_short[MAX_SLICES]; DXVA_Slice_H264_Long slice_long[MAX_SLICES]; const uint8_t *bitstream; unsigned bitstream_size; }; static void fill_picture_entry(DXVA_PicEntry_H264 *pic, unsigned index, unsigned flag) { assert((index&0x7f) == index && (flag&0x01) == flag); pic->bPicEntry = index | (flag << 7); } static void fill_picture_parameters(struct dxva_context *ctx, const H264Context *h, DXVA_PicParams_H264 *pp) { const MpegEncContext *s = &h->s; const Picture *current_picture = s->current_picture_ptr; int i, j; memset(pp, 0, sizeof(*pp)); /* Configure current picture */ fill_picture_entry(&pp->CurrPic, ff_dxva2_get_surface_index(ctx, current_picture), s->picture_structure == PICT_BOTTOM_FIELD); /* Configure the set of references */ pp->UsedForReferenceFlags = 0; pp->NonExistingFrameFlags = 0; for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->RefFrameList); i++) { const Picture *r; if (j < h->short_ref_count) { r = h->short_ref[j++]; } else { r = NULL; while (!r && j < h->short_ref_count + 16) r = h->long_ref[j++ - h->short_ref_count]; } if (r) { fill_picture_entry(&pp->RefFrameList[i], ff_dxva2_get_surface_index(ctx, r), r->long_ref != 0); if ((r->f.reference & PICT_TOP_FIELD) && r->field_poc[0] != INT_MAX) pp->FieldOrderCntList[i][0] = r->field_poc[0]; if ((r->f.reference & PICT_BOTTOM_FIELD) && r->field_poc[1] != INT_MAX) pp->FieldOrderCntList[i][1] = r->field_poc[1]; pp->FrameNumList[i] = r->long_ref ? r->pic_id : r->frame_num; if (r->f.reference & PICT_TOP_FIELD) pp->UsedForReferenceFlags |= 1 << (2*i + 0); if (r->f.reference & PICT_BOTTOM_FIELD) pp->UsedForReferenceFlags |= 1 << (2*i + 1); } else { pp->RefFrameList[i].bPicEntry = 0xff; pp->FieldOrderCntList[i][0] = 0; pp->FieldOrderCntList[i][1] = 0; pp->FrameNumList[i] = 0; } } pp->wFrameWidthInMbsMinus1 = s->mb_width - 1; pp->wFrameHeightInMbsMinus1 = s->mb_height - 1; pp->num_ref_frames = h->sps.ref_frame_count; pp->wBitFields = ((s->picture_structure != PICT_FRAME) << 0) | ((h->sps.mb_aff && (s->picture_structure == PICT_FRAME)) << 1) | (h->sps.residual_color_transform_flag << 2) | /* sp_for_switch_flag (not implemented by FFmpeg) */ (0 << 3) | (h->sps.chroma_format_idc << 4) | ((h->nal_ref_idc != 0) << 6) | (h->pps.constrained_intra_pred << 7) | (h->pps.weighted_pred << 8) | (h->pps.weighted_bipred_idc << 9) | /* MbsConsecutiveFlag */ (1 << 11) | (h->sps.frame_mbs_only_flag << 12) | (h->pps.transform_8x8_mode << 13) | ((h->sps.level_idc >= 31) << 14) | /* IntraPicFlag (Modified if we detect a non * intra slice in decode_slice) */ (1 << 15); pp->bit_depth_luma_minus8 = h->sps.bit_depth_luma - 8; pp->bit_depth_chroma_minus8 = h->sps.bit_depth_chroma - 8; if (ctx->workaround & FF_DXVA2_WORKAROUND_SCALING_LIST_ZIGZAG) pp->Reserved16Bits = 0; else pp->Reserved16Bits = 3; /* FIXME is there a way to detect the right mode ? */ pp->StatusReportFeedbackNumber = 1 + ctx->report_id++; pp->CurrFieldOrderCnt[0] = 0; if ((s->picture_structure & PICT_TOP_FIELD) && current_picture->field_poc[0] != INT_MAX) pp->CurrFieldOrderCnt[0] = current_picture->field_poc[0]; pp->CurrFieldOrderCnt[1] = 0; if ((s->picture_structure & PICT_BOTTOM_FIELD) && current_picture->field_poc[1] != INT_MAX) pp->CurrFieldOrderCnt[1] = current_picture->field_poc[1]; pp->pic_init_qs_minus26 = h->pps.init_qs - 26; pp->chroma_qp_index_offset = h->pps.chroma_qp_index_offset[0]; pp->second_chroma_qp_index_offset = h->pps.chroma_qp_index_offset[1]; pp->ContinuationFlag = 1; pp->pic_init_qp_minus26 = h->pps.init_qp - 26; pp->num_ref_idx_l0_active_minus1 = h->pps.ref_count[0] - 1; pp->num_ref_idx_l1_active_minus1 = h->pps.ref_count[1] - 1; pp->Reserved8BitsA = 0; pp->frame_num = h->frame_num; pp->log2_max_frame_num_minus4 = h->sps.log2_max_frame_num - 4; pp->pic_order_cnt_type = h->sps.poc_type; if (h->sps.poc_type == 0) pp->log2_max_pic_order_cnt_lsb_minus4 = h->sps.log2_max_poc_lsb - 4; else if (h->sps.poc_type == 1) pp->delta_pic_order_always_zero_flag = h->sps.delta_pic_order_always_zero_flag; pp->direct_8x8_inference_flag = h->sps.direct_8x8_inference_flag; pp->entropy_coding_mode_flag = h->pps.cabac; pp->pic_order_present_flag = h->pps.pic_order_present; pp->num_slice_groups_minus1 = h->pps.slice_group_count - 1; pp->slice_group_map_type = h->pps.mb_slice_group_map_type; pp->deblocking_filter_control_present_flag = h->pps.deblocking_filter_parameters_present; pp->redundant_pic_cnt_present_flag= h->pps.redundant_pic_cnt_present; pp->Reserved8BitsB = 0; pp->slice_group_change_rate_minus1= 0; /* XXX not implemented by FFmpeg */ //pp->SliceGroupMap[810]; /* XXX not implemented by FFmpeg */ } static void fill_scaling_lists(struct dxva_context *ctx, const H264Context *h, DXVA_Qmatrix_H264 *qm) { unsigned i, j; memset(qm, 0, sizeof(*qm)); if (ctx->workaround & FF_DXVA2_WORKAROUND_SCALING_LIST_ZIGZAG) { for (i = 0; i < 6; i++) for (j = 0; j < 16; j++) qm->bScalingLists4x4[i][j] = h->pps.scaling_matrix4[i][j]; for (i = 0; i < 64; i++) { qm->bScalingLists8x8[0][i] = h->pps.scaling_matrix8[0][i]; qm->bScalingLists8x8[1][i] = h->pps.scaling_matrix8[3][i]; } } else { for (i = 0; i < 6; i++) for (j = 0; j < 16; j++) qm->bScalingLists4x4[i][j] = h->pps.scaling_matrix4[i][zigzag_scan[j]]; for (i = 0; i < 64; i++) { qm->bScalingLists8x8[0][i] = h->pps.scaling_matrix8[0][ff_zigzag_direct[i]]; qm->bScalingLists8x8[1][i] = h->pps.scaling_matrix8[3][ff_zigzag_direct[i]]; } } } static int is_slice_short(struct dxva_context *ctx) { assert(ctx->cfg->ConfigBitstreamRaw == 1 || ctx->cfg->ConfigBitstreamRaw == 2); return ctx->cfg->ConfigBitstreamRaw == 2; } static void fill_slice_short(DXVA_Slice_H264_Short *slice, unsigned position, unsigned size) { memset(slice, 0, sizeof(*slice)); slice->BSNALunitDataLocation = position; slice->SliceBytesInBuffer = size; slice->wBadSliceChopping = 0; } static void fill_slice_long(AVCodecContext *avctx, DXVA_Slice_H264_Long *slice, unsigned position, unsigned size) { const H264Context *h = avctx->priv_data; struct dxva_context *ctx = avctx->hwaccel_context; const MpegEncContext *s = &h->s; unsigned list; memset(slice, 0, sizeof(*slice)); slice->BSNALunitDataLocation = position; slice->SliceBytesInBuffer = size; slice->wBadSliceChopping = 0; slice->first_mb_in_slice = (s->mb_y >> FIELD_OR_MBAFF_PICTURE) * s->mb_width + s->mb_x; slice->NumMbsForSlice = 0; /* XXX it is set once we have all slices */ slice->BitOffsetToSliceData = get_bits_count(&s->gb); slice->slice_type = ff_h264_get_slice_type(h); if (h->slice_type_fixed) slice->slice_type += 5; slice->luma_log2_weight_denom = h->luma_log2_weight_denom; slice->chroma_log2_weight_denom = h->chroma_log2_weight_denom; if (h->list_count > 0) slice->num_ref_idx_l0_active_minus1 = h->ref_count[0] - 1; if (h->list_count > 1) slice->num_ref_idx_l1_active_minus1 = h->ref_count[1] - 1; slice->slice_alpha_c0_offset_div2 = h->slice_alpha_c0_offset / 2 - 26; slice->slice_beta_offset_div2 = h->slice_beta_offset / 2 - 26; slice->Reserved8Bits = 0; for (list = 0; list < 2; list++) { unsigned i; for (i = 0; i < FF_ARRAY_ELEMS(slice->RefPicList[list]); i++) { if (list < h->list_count && i < h->ref_count[list]) { const Picture *r = &h->ref_list[list][i]; unsigned plane; fill_picture_entry(&slice->RefPicList[list][i], ff_dxva2_get_surface_index(ctx, r), r->f.reference == PICT_BOTTOM_FIELD); for (plane = 0; plane < 3; plane++) { int w, o; if (plane == 0 && h->luma_weight_flag[list]) { w = h->luma_weight[i][list][0]; o = h->luma_weight[i][list][1]; } else if (plane >= 1 && h->chroma_weight_flag[list]) { w = h->chroma_weight[i][list][plane-1][0]; o = h->chroma_weight[i][list][plane-1][1]; } else { w = 1 << (plane == 0 ? h->luma_log2_weight_denom : h->chroma_log2_weight_denom); o = 0; } slice->Weights[list][i][plane][0] = w; slice->Weights[list][i][plane][1] = o; } } else { unsigned plane; slice->RefPicList[list][i].bPicEntry = 0xff; for (plane = 0; plane < 3; plane++) { slice->Weights[list][i][plane][0] = 0; slice->Weights[list][i][plane][1] = 0; } } } } slice->slice_qs_delta = 0; /* XXX not implemented by FFmpeg */ slice->slice_qp_delta = s->qscale - h->pps.init_qp; slice->redundant_pic_cnt = h->redundant_pic_count; if (h->slice_type == AV_PICTURE_TYPE_B) slice->direct_spatial_mv_pred_flag = h->direct_spatial_mv_pred; slice->cabac_init_idc = h->pps.cabac ? h->cabac_init_idc : 0; if (h->deblocking_filter < 2) slice->disable_deblocking_filter_idc = 1 - h->deblocking_filter; else slice->disable_deblocking_filter_idc = h->deblocking_filter; slice->slice_id = h->current_slice - 1; } static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx, DXVA2_DecodeBufferDesc *bs, DXVA2_DecodeBufferDesc *sc) { const H264Context *h = avctx->priv_data; const MpegEncContext *s = &h->s; const unsigned mb_count = s->mb_width * s->mb_height; struct dxva_context *ctx = avctx->hwaccel_context; const Picture *current_picture = h->s.current_picture_ptr; struct dxva2_picture_context *ctx_pic = current_picture->f.hwaccel_picture_private; DXVA_Slice_H264_Short *slice = NULL; uint8_t *dxva_data, *current, *end; unsigned dxva_size; void *slice_data; unsigned slice_size; unsigned padding; unsigned i; /* Create an annex B bitstream buffer with only slice NAL and finalize slice */ if (FAILED(IDirectXVideoDecoder_GetBuffer(ctx->decoder, DXVA2_BitStreamDateBufferType, (void **)&dxva_data, &dxva_size))) return -1; current = dxva_data; end = dxva_data + dxva_size; for (i = 0; i < ctx_pic->slice_count; i++) { static const uint8_t start_code[] = { 0, 0, 1 }; static const unsigned start_code_size = sizeof(start_code); unsigned position, size; assert(offsetof(DXVA_Slice_H264_Short, BSNALunitDataLocation) == offsetof(DXVA_Slice_H264_Long, BSNALunitDataLocation)); assert(offsetof(DXVA_Slice_H264_Short, SliceBytesInBuffer) == offsetof(DXVA_Slice_H264_Long, SliceBytesInBuffer)); if (is_slice_short(ctx)) slice = &ctx_pic->slice_short[i]; else slice = (DXVA_Slice_H264_Short*)&ctx_pic->slice_long[i]; position = slice->BSNALunitDataLocation; size = slice->SliceBytesInBuffer; if (start_code_size + size > end - current) { av_log(avctx, AV_LOG_ERROR, "Failed to build bitstream"); break; } slice->BSNALunitDataLocation = current - dxva_data; slice->SliceBytesInBuffer = start_code_size + size; if (!is_slice_short(ctx)) { DXVA_Slice_H264_Long *slice_long = (DXVA_Slice_H264_Long*)slice; if (i < ctx_pic->slice_count - 1) slice_long->NumMbsForSlice = slice_long[1].first_mb_in_slice - slice_long[0].first_mb_in_slice; else slice_long->NumMbsForSlice = mb_count - slice_long->first_mb_in_slice; } memcpy(current, start_code, start_code_size); current += start_code_size; memcpy(current, &ctx_pic->bitstream[position], size); current += size; } padding = FFMIN(128 - ((current - dxva_data) & 127), end - current); if (slice && padding > 0) { memset(current, 0, padding); current += padding; slice->SliceBytesInBuffer += padding; } if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(ctx->decoder, DXVA2_BitStreamDateBufferType))) return -1; if (i < ctx_pic->slice_count) return -1; memset(bs, 0, sizeof(*bs)); bs->CompressedBufferType = DXVA2_BitStreamDateBufferType; bs->DataSize = current - dxva_data; bs->NumMBsInBuffer = mb_count; if (is_slice_short(ctx)) { slice_data = ctx_pic->slice_short; slice_size = ctx_pic->slice_count * sizeof(*ctx_pic->slice_short); } else { slice_data = ctx_pic->slice_long; slice_size = ctx_pic->slice_count * sizeof(*ctx_pic->slice_long); } assert((bs->DataSize & 127) == 0); return ff_dxva2_commit_buffer(avctx, ctx, sc, DXVA2_SliceControlBufferType, slice_data, slice_size, mb_count); } static int start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size) { const H264Context *h = avctx->priv_data; struct dxva_context *ctx = avctx->hwaccel_context; struct dxva2_picture_context *ctx_pic = h->s.current_picture_ptr->f.hwaccel_picture_private; if (!ctx->decoder || !ctx->cfg || ctx->surface_count <= 0) return -1; assert(ctx_pic); /* Fill up DXVA_PicParams_H264 */ fill_picture_parameters(ctx, h, &ctx_pic->pp); /* Fill up DXVA_Qmatrix_H264 */ fill_scaling_lists(ctx, h, &ctx_pic->qm); ctx_pic->slice_count = 0; ctx_pic->bitstream_size = 0; ctx_pic->bitstream = NULL; return 0; } static int decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size) { const H264Context *h = avctx->priv_data; struct dxva_context *ctx = avctx->hwaccel_context; const Picture *current_picture = h->s.current_picture_ptr; struct dxva2_picture_context *ctx_pic = current_picture->f.hwaccel_picture_private; unsigned position; if (ctx_pic->slice_count >= MAX_SLICES) return -1; if (!ctx_pic->bitstream) ctx_pic->bitstream = buffer; ctx_pic->bitstream_size += size; position = buffer - ctx_pic->bitstream; if (is_slice_short(ctx)) 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 end_frame(AVCodecContext *avctx) { H264Context *h = avctx->priv_data; MpegEncContext *s = &h->s; struct dxva2_picture_context *ctx_pic = h->s.current_picture_ptr->f.hwaccel_picture_private; if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0) return -1; return ff_dxva2_common_end_frame(avctx, s, &ctx_pic->pp, sizeof(ctx_pic->pp), &ctx_pic->qm, sizeof(ctx_pic->qm), commit_bitstream_and_slice_buffer); } 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 = start_frame, .decode_slice = decode_slice, .end_frame = end_frame, .priv_data_size = sizeof(struct dxva2_picture_context), };