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/*
* 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
*/
|
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#include "dxva2_internal.h" |
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#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)
{ |
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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));
/* Configure current picture */
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 */
pp->UsedForReferenceFlags = 0;
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;
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];
} |
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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];
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);
} else {
pp->RefFrameList[i].bPicEntry = 0xff;
pp->FieldOrderCntList[i][0] = 0;
pp->FieldOrderCntList[i][1] = 0;
pp->FrameNumList[i] = 0;
}
}
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pp->wFrameWidthInMbsMinus1 = h->mb_width - 1;
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) |
(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 |
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* intra slice in dxva2_h264_decode_slice) */ |
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(1 << 15);
pp->bit_depth_luma_minus8 = h->sps.bit_depth_luma - 8;
pp->bit_depth_chroma_minus8 = h->sps.bit_depth_chroma - 8; |
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if (ctx->workaround & FF_DXVA2_WORKAROUND_SCALING_LIST_ZIGZAG)
pp->Reserved16Bits = 0;
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++;
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)
pp->CurrFieldOrderCnt[0] = current_picture->field_poc[0];
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)
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; |
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pp->slice_group_change_rate_minus1= 0; /* XXX not implemented by FFmpeg */
//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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{
unsigned i, j;
memset(qm, 0, sizeof(*qm)); |
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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];
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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]; |
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} |
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} else { |
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for (i = 0; i < 6; i++)
for (j = 0; j < 16; j++)
qm->bScalingLists4x4[i][j] = h->pps.scaling_matrix4[i][zigzag_scan[j]]; |
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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]]; |
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} |
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} |
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}
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)
{ |
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const H264Context *h = avctx->priv_data; |
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struct dxva_context *ctx = avctx->hwaccel_context;
unsigned list;
memset(slice, 0, sizeof(*slice));
slice->BSNALunitDataLocation = position;
slice->SliceBytesInBuffer = size;
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);
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; |
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slice->slice_alpha_c0_offset_div2 = h->slice_alpha_c0_offset / 2;
slice->slice_beta_offset_div2 = h->slice_beta_offset / 2; |
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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], |
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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++) {
int w, o;
if (plane == 0 && h->luma_weight_flag[list]) { |
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w = h->luma_weight[i][list][0];
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];
o = h->chroma_weight[i][list][plane-1][1]; |
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} 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;
}
}
}
} |
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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;
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, |
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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;
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, |
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(void **)&dxva_data, &dxva_size))) |
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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); |
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return ff_dxva2_commit_buffer(avctx, ctx, sc,
DXVA2_SliceControlBufferType,
slice_data, slice_size, mb_count); |
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}
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static int dxva2_h264_start_frame(AVCodecContext *avctx,
av_unused const uint8_t *buffer,
av_unused uint32_t size) |
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{
const H264Context *h = avctx->priv_data;
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)
return -1;
assert(ctx_pic);
/* Fill up DXVA_PicParams_H264 */
fill_picture_parameters(ctx, h, &ctx_pic->pp);
/* 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;
ctx_pic->bitstream_size = 0;
ctx_pic->bitstream = NULL;
return 0;
}
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static int dxva2_h264_decode_slice(AVCodecContext *avctx,
const uint8_t *buffer,
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;
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++;
|
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if (h->slice_type != AV_PICTURE_TYPE_I && h->slice_type != AV_PICTURE_TYPE_SI) |
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ctx_pic->pp.wBitFields &= ~(1 << 15); /* Set IntraPicFlag to 0 */
return 0;
}
|
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static int dxva2_h264_end_frame(AVCodecContext *avctx) |
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{
H264Context *h = avctx->priv_data;
struct dxva2_picture_context *ctx_pic = |
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h->cur_pic_ptr->hwaccel_picture_private; |
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int ret; |
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if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0)
return -1; |
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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; |
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}
|
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AVHWAccel ff_h264_dxva2_hwaccel = { |
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.name = "h264_dxva2", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.id = AV_CODEC_ID_H264, |
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.pix_fmt = AV_PIX_FMT_DXVA2_VLD, |
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.start_frame = dxva2_h264_start_frame,
.decode_slice = dxva2_h264_decode_slice,
.end_frame = dxva2_h264_end_frame, |
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.priv_data_size = sizeof(struct dxva2_picture_context),
}; |