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ffmpeg/libavcodec/dxva2_hevc.c

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/*
* DXVA2 HEVC HW acceleration.
*
* copyright (c) 2014 - 2015 Hendrik Leppkes
*
* 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 "libavutil/avassert.h"
#include "dxva2_internal.h"
#include "hevc.h"
#define MAX_SLICES 256
struct hevc_dxva2_picture_context {
DXVA_PicParams_HEVC pp;
DXVA_Qmatrix_HEVC qm;
unsigned slice_count;
DXVA_Slice_HEVC_Short slice_short[MAX_SLICES];
const uint8_t *bitstream;
unsigned bitstream_size;
};
static void fill_picture_entry(DXVA_PicEntry_HEVC *pic,
unsigned index, unsigned flag)
{
av_assert0((index & 0x7f) == index && (flag & 0x01) == flag);
pic->bPicEntry = index | (flag << 7);
}
static int get_refpic_index(const DXVA_PicParams_HEVC *pp, int surface_index)
{
int i;
for (i = 0; i < FF_ARRAY_ELEMS(pp->RefPicList); i++) {
if ((pp->RefPicList[i].bPicEntry & 0x7f) == surface_index)
return i;
}
return 0xff;
}
static void fill_picture_parameters(struct dxva_context *ctx, const HEVCContext *h,
DXVA_PicParams_HEVC *pp)
{
const HEVCFrame *current_picture = h->ref;
int i, j, k;
memset(pp, 0, sizeof(*pp));
pp->PicWidthInMinCbsY = h->sps->min_cb_width;
pp->PicHeightInMinCbsY = h->sps->min_cb_height;
pp->wFormatAndSequenceInfoFlags = (h->sps->chroma_format_idc << 0) |
(h->sps->separate_colour_plane_flag << 2) |
((h->sps->bit_depth - 8) << 3) |
((h->sps->bit_depth - 8) << 6) |
((h->sps->log2_max_poc_lsb - 4) << 9) |
(0 << 13) |
(0 << 14) |
(0 << 15);
fill_picture_entry(&pp->CurrPic, ff_dxva2_get_surface_index(ctx, current_picture->frame), 0);
pp->sps_max_dec_pic_buffering_minus1 = h->sps->temporal_layer[h->sps->max_sub_layers - 1].max_dec_pic_buffering - 1;
pp->log2_min_luma_coding_block_size_minus3 = h->sps->log2_min_cb_size - 3;
pp->log2_diff_max_min_luma_coding_block_size = h->sps->log2_diff_max_min_coding_block_size;
pp->log2_min_transform_block_size_minus2 = h->sps->log2_min_tb_size - 2;
pp->log2_diff_max_min_transform_block_size = h->sps->log2_max_trafo_size - h->sps->log2_min_tb_size;
pp->max_transform_hierarchy_depth_inter = h->sps->max_transform_hierarchy_depth_inter;
pp->max_transform_hierarchy_depth_intra = h->sps->max_transform_hierarchy_depth_intra;
pp->num_short_term_ref_pic_sets = h->sps->nb_st_rps;
pp->num_long_term_ref_pics_sps = h->sps->num_long_term_ref_pics_sps;
pp->num_ref_idx_l0_default_active_minus1 = h->pps->num_ref_idx_l0_default_active - 1;
pp->num_ref_idx_l1_default_active_minus1 = h->pps->num_ref_idx_l1_default_active - 1;
pp->init_qp_minus26 = h->pps->pic_init_qp_minus26;
if (h->sh.short_term_ref_pic_set_sps_flag == 0 && h->sh.short_term_rps) {
pp->ucNumDeltaPocsOfRefRpsIdx = h->sh.short_term_rps->num_delta_pocs;
pp->wNumBitsForShortTermRPSInSlice = h->sh.short_term_ref_pic_set_size;
}
pp->dwCodingParamToolFlags = (h->sps->scaling_list_enable_flag << 0) |
(h->sps->amp_enabled_flag << 1) |
(h->sps->sao_enabled << 2) |
(h->sps->pcm_enabled_flag << 3) |
((h->sps->pcm_enabled_flag ? (h->sps->pcm.bit_depth - 1) : 0) << 4) |
((h->sps->pcm_enabled_flag ? (h->sps->pcm.bit_depth_chroma - 1) : 0) << 8) |
((h->sps->pcm_enabled_flag ? (h->sps->pcm.log2_min_pcm_cb_size - 3) : 0) << 12) |
((h->sps->pcm_enabled_flag ? (h->sps->pcm.log2_max_pcm_cb_size - h->sps->pcm.log2_min_pcm_cb_size) : 0) << 14) |
(h->sps->pcm.loop_filter_disable_flag << 16) |
(h->sps->long_term_ref_pics_present_flag << 17) |
(h->sps->sps_temporal_mvp_enabled_flag << 18) |
(h->sps->sps_strong_intra_smoothing_enable_flag << 19) |
(h->pps->dependent_slice_segments_enabled_flag << 20) |
(h->pps->output_flag_present_flag << 21) |
(h->pps->num_extra_slice_header_bits << 22) |
(h->pps->sign_data_hiding_flag << 25) |
(h->pps->cabac_init_present_flag << 26) |
(0 << 27);
pp->dwCodingSettingPicturePropertyFlags = (h->pps->constrained_intra_pred_flag << 0) |
(h->pps->transform_skip_enabled_flag << 1) |
(h->pps->cu_qp_delta_enabled_flag << 2) |
(h->pps->pic_slice_level_chroma_qp_offsets_present_flag << 3) |
(h->pps->weighted_pred_flag << 4) |
(h->pps->weighted_bipred_flag << 5) |
(h->pps->transquant_bypass_enable_flag << 6) |
(h->pps->tiles_enabled_flag << 7) |
(h->pps->entropy_coding_sync_enabled_flag << 8) |
(h->pps->uniform_spacing_flag << 9) |
((h->pps->tiles_enabled_flag ? h->pps->loop_filter_across_tiles_enabled_flag : 0) << 10) |
(h->pps->seq_loop_filter_across_slices_enabled_flag << 11) |
(h->pps->deblocking_filter_override_enabled_flag << 12) |
(h->pps->disable_dbf << 13) |
(h->pps->lists_modification_present_flag << 14) |
(h->pps->slice_header_extension_present_flag << 15) |
(IS_IRAP(h) << 16) |
(IS_IDR(h) << 17) |
/* IntraPicFlag */
(IS_IRAP(h) << 18) |
(0 << 19);
pp->pps_cb_qp_offset = h->pps->cb_qp_offset;
pp->pps_cr_qp_offset = h->pps->cr_qp_offset;
if (h->pps->tiles_enabled_flag) {
pp->num_tile_columns_minus1 = h->pps->num_tile_columns - 1;
pp->num_tile_rows_minus1 = h->pps->num_tile_rows - 1;
if (!h->pps->uniform_spacing_flag) {
for (i = 0; i < h->pps->num_tile_columns; i++)
pp->column_width_minus1[i] = h->pps->column_width[i] - 1;
for (i = 0; i < h->pps->num_tile_rows; i++)
pp->row_height_minus1[i] = h->pps->row_height[i] - 1;
}
}
pp->diff_cu_qp_delta_depth = h->pps->diff_cu_qp_delta_depth;
pp->pps_beta_offset_div2 = h->pps->beta_offset / 2;
pp->pps_tc_offset_div2 = h->pps->tc_offset / 2;
pp->log2_parallel_merge_level_minus2 = h->pps->log2_parallel_merge_level - 2;
pp->CurrPicOrderCntVal = h->poc;
// empty the lists
memset(&pp->RefPicList, 0xff, sizeof(pp->RefPicList));
memset(&pp->RefPicSetStCurrBefore, 0xff, sizeof(pp->RefPicSetStCurrBefore));
memset(&pp->RefPicSetStCurrAfter, 0xff, sizeof(pp->RefPicSetStCurrAfter));
memset(&pp->RefPicSetLtCurr, 0xff, sizeof(pp->RefPicSetLtCurr));
// fill RefPicList from the DPB
for (i = 0, j = 0; i < FF_ARRAY_ELEMS(h->DPB); i++) {
const HEVCFrame *frame = &h->DPB[i];
if (frame != current_picture && (frame->flags & (HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF))) {
fill_picture_entry(&pp->RefPicList[j], ff_dxva2_get_surface_index(ctx, frame->frame), !!(frame->flags & HEVC_FRAME_FLAG_LONG_REF));
pp->PicOrderCntValList[j] = frame->poc;
j++;
}
}
#define DO_REF_LIST(ref_idx, ref_list) { \
const RefPicList *rpl = &h->rps[ref_idx]; \
av_assert0(rpl->nb_refs <= FF_ARRAY_ELEMS(pp->ref_list)); \
for (j = 0, k = 0; j < rpl->nb_refs; j++) { \
if (rpl->ref[j]) { \
pp->ref_list[k] = get_refpic_index(pp, ff_dxva2_get_surface_index(ctx, rpl->ref[j]->frame)); \
k++; \
} \
} \
}
// Fill short term and long term lists
DO_REF_LIST(ST_CURR_BEF, RefPicSetStCurrBefore);
DO_REF_LIST(ST_CURR_AFT, RefPicSetStCurrAfter);
DO_REF_LIST(LT_CURR, RefPicSetLtCurr);
pp->StatusReportFeedbackNumber = 1 + ctx->report_id++;
}
static void fill_scaling_lists(struct dxva_context *ctx, const HEVCContext *h, DXVA_Qmatrix_HEVC *qm)
{
unsigned i, j, pos;
const ScalingList *sl = h->pps->scaling_list_data_present_flag ?
&h->pps->scaling_list : &h->sps->scaling_list;
memset(qm, 0, sizeof(*qm));
for (i = 0; i < 6; i++) {
for (j = 0; j < 16; j++) {
pos = 4 * ff_hevc_diag_scan4x4_y[j] + ff_hevc_diag_scan4x4_x[j];
qm->ucScalingLists0[i][j] = sl->sl[0][i][pos];
}
for (j = 0; j < 64; j++) {
pos = 8 * ff_hevc_diag_scan8x8_y[j] + ff_hevc_diag_scan8x8_x[j];
qm->ucScalingLists1[i][j] = sl->sl[1][i][pos];
qm->ucScalingLists2[i][j] = sl->sl[2][i][pos];
if (i < 2)
qm->ucScalingLists3[i][j] = sl->sl[3][i][pos];
}
qm->ucScalingListDCCoefSizeID2[i] = sl->sl_dc[0][i];
if (i < 2)
qm->ucScalingListDCCoefSizeID3[i] = sl->sl_dc[1][i];
}
}
static void fill_slice_short(DXVA_Slice_HEVC_Short *slice,
unsigned position, unsigned size)
{
memset(slice, 0, sizeof(*slice));
slice->BSNALunitDataLocation = position;
slice->SliceBytesInBuffer = size;
slice->wBadSliceChopping = 0;
}
static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
DXVA2_DecodeBufferDesc *bs,
DXVA2_DecodeBufferDesc *sc)
{
const HEVCContext *h = avctx->priv_data;
struct dxva_context *ctx = avctx->hwaccel_context;
const HEVCFrame *current_picture = h->ref;
struct hevc_dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
DXVA_Slice_HEVC_Short *slice = NULL;
void *dxva_data_ptr;
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,
&dxva_data_ptr, &dxva_size)))
return -1;
dxva_data = dxva_data_ptr;
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;
slice = &ctx_pic->slice_short[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;
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 = 0;
slice_data = ctx_pic->slice_short;
slice_size = ctx_pic->slice_count * sizeof(*ctx_pic->slice_short);
av_assert0((bs->DataSize & 127) == 0);
return ff_dxva2_commit_buffer(avctx, ctx, sc,
DXVA2_SliceControlBufferType,
slice_data, slice_size, 0);
}
static int dxva2_hevc_start_frame(AVCodecContext *avctx,
av_unused const uint8_t *buffer,
av_unused uint32_t size)
{
const HEVCContext *h = avctx->priv_data;
struct dxva_context *ctx = avctx->hwaccel_context;
struct hevc_dxva2_picture_context *ctx_pic = h->ref->hwaccel_picture_private;
if (!ctx->decoder || !ctx->cfg || ctx->surface_count <= 0)
return -1;
av_assert0(ctx_pic);
/* Fill up DXVA_PicParams_HEVC */
fill_picture_parameters(ctx, h, &ctx_pic->pp);
/* Fill up DXVA_Qmatrix_HEVC */
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 dxva2_hevc_decode_slice(AVCodecContext *avctx,
const uint8_t *buffer,
uint32_t size)
{
const HEVCContext *h = avctx->priv_data;
const HEVCFrame *current_picture = h->ref;
struct hevc_dxva2_picture_context *ctx_pic = current_picture->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;
fill_slice_short(&ctx_pic->slice_short[ctx_pic->slice_count], position, size);
ctx_pic->slice_count++;
return 0;
}
static int dxva2_hevc_end_frame(AVCodecContext *avctx)
{
HEVCContext *h = avctx->priv_data;
struct hevc_dxva2_picture_context *ctx_pic = h->ref->hwaccel_picture_private;
int scale = ctx_pic->pp.dwCodingParamToolFlags & 1;
int ret;
if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0)
return -1;
ret = ff_dxva2_common_end_frame(avctx, h->ref->frame,
&ctx_pic->pp, sizeof(ctx_pic->pp),
scale ? &ctx_pic->qm : NULL, scale ? sizeof(ctx_pic->qm) : 0,
commit_bitstream_and_slice_buffer);
return ret;
}
AVHWAccel ff_hevc_dxva2_hwaccel = {
.name = "hevc_dxva2",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_HEVC,
.pix_fmt = AV_PIX_FMT_DXVA2_VLD,
.start_frame = dxva2_hevc_start_frame,
.decode_slice = dxva2_hevc_decode_slice,
.end_frame = dxva2_hevc_end_frame,
.frame_priv_data_size = sizeof(struct hevc_dxva2_picture_context),
};
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