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FFmpeg/libavcodec/dxva2_hevc.c
wm4 70143a3954 dxva: add support for new dxva2 and d3d11 hwaccel APIs 
This also adds support to avconv (which is trivial due to the new
hwaccel API being generic enough).

The new decoder setup code in dxva2.c is significantly based on work by
Steve Lhomme <robux4@gmail.com>, but with heavy changes/rewrites.

Merges Libav commit f9e7a2f95a.
Also adds untested VP9 support.
The check for DXVA2 COBJs is removed. Just update your MinGW to
something newer than a 5 year old release.

Signed-off-by: Diego Biurrun <diego@biurrun.de>
2017-06-27 18:05:02 +02:00

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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 "hevc_data.h"
#include "hevcdec.h"
// The headers above may include w32threads.h, which uses the original
// _WIN32_WINNT define, while dxva2_internal.h redefines it to target a
// potentially newer version.
#include "dxva2_internal.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(const AVCodecContext *avctx, AVDXVAContext *ctx, const HEVCContext *h,
DXVA_PicParams_HEVC *pp)
{
const HEVCFrame *current_picture = h->ref;
const HEVCSPS *sps = h->ps.sps;
const HEVCPPS *pps = h->ps.pps;
int i, j;
memset(pp, 0, sizeof(*pp));
pp->PicWidthInMinCbsY = sps->min_cb_width;
pp->PicHeightInMinCbsY = sps->min_cb_height;
pp->wFormatAndSequenceInfoFlags = (sps->chroma_format_idc << 0) |
(sps->separate_colour_plane_flag << 2) |
((sps->bit_depth - 8) << 3) |
((sps->bit_depth - 8) << 6) |
((sps->log2_max_poc_lsb - 4) << 9) |
(0 << 13) |
(0 << 14) |
(0 << 15);
fill_picture_entry(&pp->CurrPic, ff_dxva2_get_surface_index(avctx, ctx, current_picture->frame), 0);
pp->sps_max_dec_pic_buffering_minus1 = sps->temporal_layer[sps->max_sub_layers - 1].max_dec_pic_buffering - 1;
pp->log2_min_luma_coding_block_size_minus3 = sps->log2_min_cb_size - 3;
pp->log2_diff_max_min_luma_coding_block_size = sps->log2_diff_max_min_coding_block_size;
pp->log2_min_transform_block_size_minus2 = sps->log2_min_tb_size - 2;
pp->log2_diff_max_min_transform_block_size = sps->log2_max_trafo_size - sps->log2_min_tb_size;
pp->max_transform_hierarchy_depth_inter = sps->max_transform_hierarchy_depth_inter;
pp->max_transform_hierarchy_depth_intra = sps->max_transform_hierarchy_depth_intra;
pp->num_short_term_ref_pic_sets = sps->nb_st_rps;
pp->num_long_term_ref_pics_sps = sps->num_long_term_ref_pics_sps;
pp->num_ref_idx_l0_default_active_minus1 = pps->num_ref_idx_l0_default_active - 1;
pp->num_ref_idx_l1_default_active_minus1 = pps->num_ref_idx_l1_default_active - 1;
pp->init_qp_minus26 = 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->rps_idx_num_delta_pocs;
pp->wNumBitsForShortTermRPSInSlice = h->sh.short_term_ref_pic_set_size;
}
pp->dwCodingParamToolFlags = (sps->scaling_list_enable_flag << 0) |
(sps->amp_enabled_flag << 1) |
(sps->sao_enabled << 2) |
(sps->pcm_enabled_flag << 3) |
((sps->pcm_enabled_flag ? (sps->pcm.bit_depth - 1) : 0) << 4) |
((sps->pcm_enabled_flag ? (sps->pcm.bit_depth_chroma - 1) : 0) << 8) |
((sps->pcm_enabled_flag ? (sps->pcm.log2_min_pcm_cb_size - 3) : 0) << 12) |
((sps->pcm_enabled_flag ? (sps->pcm.log2_max_pcm_cb_size - sps->pcm.log2_min_pcm_cb_size) : 0) << 14) |
(sps->pcm.loop_filter_disable_flag << 16) |
(sps->long_term_ref_pics_present_flag << 17) |
(sps->sps_temporal_mvp_enabled_flag << 18) |
(sps->sps_strong_intra_smoothing_enable_flag << 19) |
(pps->dependent_slice_segments_enabled_flag << 20) |
(pps->output_flag_present_flag << 21) |
(pps->num_extra_slice_header_bits << 22) |
(pps->sign_data_hiding_flag << 25) |
(pps->cabac_init_present_flag << 26) |
(0 << 27);
pp->dwCodingSettingPicturePropertyFlags = (pps->constrained_intra_pred_flag << 0) |
(pps->transform_skip_enabled_flag << 1) |
(pps->cu_qp_delta_enabled_flag << 2) |
(pps->pic_slice_level_chroma_qp_offsets_present_flag << 3) |
(pps->weighted_pred_flag << 4) |
(pps->weighted_bipred_flag << 5) |
(pps->transquant_bypass_enable_flag << 6) |
(pps->tiles_enabled_flag << 7) |
(pps->entropy_coding_sync_enabled_flag << 8) |
(pps->uniform_spacing_flag << 9) |
((pps->tiles_enabled_flag ? pps->loop_filter_across_tiles_enabled_flag : 0) << 10) |
(pps->seq_loop_filter_across_slices_enabled_flag << 11) |
(pps->deblocking_filter_override_enabled_flag << 12) |
(pps->disable_dbf << 13) |
(pps->lists_modification_present_flag << 14) |
(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 = pps->cb_qp_offset;
pp->pps_cr_qp_offset = pps->cr_qp_offset;
if (pps->tiles_enabled_flag) {
pp->num_tile_columns_minus1 = pps->num_tile_columns - 1;
pp->num_tile_rows_minus1 = pps->num_tile_rows - 1;
if (!pps->uniform_spacing_flag) {
for (i = 0; i < pps->num_tile_columns; i++)
pp->column_width_minus1[i] = pps->column_width[i] - 1;
for (i = 0; i < pps->num_tile_rows; i++)
pp->row_height_minus1[i] = pps->row_height[i] - 1;
}
}
pp->diff_cu_qp_delta_depth = pps->diff_cu_qp_delta_depth;
pp->pps_beta_offset_div2 = pps->beta_offset / 2;
pp->pps_tc_offset_div2 = pps->tc_offset / 2;
pp->log2_parallel_merge_level_minus2 = pps->log2_parallel_merge_level - 2;
pp->CurrPicOrderCntVal = h->poc;
// fill RefPicList from the DPB
for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->RefPicList); i++) {
const HEVCFrame *frame = NULL;
while (!frame && j < FF_ARRAY_ELEMS(h->DPB)) {
if (&h->DPB[j] != current_picture && (h->DPB[j].flags & (HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF)))
frame = &h->DPB[j];
j++;
}
if (frame) {
fill_picture_entry(&pp->RefPicList[i], ff_dxva2_get_surface_index(avctx, ctx, frame->frame), !!(frame->flags & HEVC_FRAME_FLAG_LONG_REF));
pp->PicOrderCntValList[i] = frame->poc;
} else {
pp->RefPicList[i].bPicEntry = 0xff;
pp->PicOrderCntValList[i] = 0;
}
}
#define DO_REF_LIST(ref_idx, ref_list) { \
const RefPicList *rpl = &h->rps[ref_idx]; \
for (i = 0, j = 0; i < FF_ARRAY_ELEMS(pp->ref_list); i++) { \
const HEVCFrame *frame = NULL; \
while (!frame && j < rpl->nb_refs) \
frame = rpl->ref[j++]; \
if (frame) \
pp->ref_list[i] = get_refpic_index(pp, ff_dxva2_get_surface_index(avctx, ctx, frame->frame)); \
else \
pp->ref_list[i] = 0xff; \
} \
}
// 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 + DXVA_CONTEXT_REPORT_ID(avctx, ctx)++;
}
static void fill_scaling_lists(AVDXVAContext *ctx, const HEVCContext *h, DXVA_Qmatrix_HEVC *qm)
{
unsigned i, j, pos;
const ScalingList *sl = h->ps.pps->scaling_list_data_present_flag ?
&h->ps.pps->scaling_list : &h->ps.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 * 3][pos];
}
qm->ucScalingListDCCoefSizeID2[i] = sl->sl_dc[0][i];
if (i < 2)
qm->ucScalingListDCCoefSizeID3[i] = sl->sl_dc[1][i * 3];
}
}
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,
DECODER_BUFFER_DESC *bs,
DECODER_BUFFER_DESC *sc)
{
const HEVCContext *h = avctx->priv_data;
AVDXVAContext *ctx = DXVA_CONTEXT(avctx);
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;
unsigned type;
/* Create an annex B bitstream buffer with only slice NAL and finalize slice */
#if CONFIG_D3D11VA
if (ff_dxva2_is_d3d11(avctx)) {
type = D3D11_VIDEO_DECODER_BUFFER_BITSTREAM;
if (FAILED(ID3D11VideoContext_GetDecoderBuffer(D3D11VA_CONTEXT(ctx)->video_context,
D3D11VA_CONTEXT(ctx)->decoder,
type,
&dxva_size, &dxva_data_ptr)))
return -1;
}
#endif
#if CONFIG_DXVA2
if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD) {
type = DXVA2_BitStreamDateBufferType;
if (FAILED(IDirectXVideoDecoder_GetBuffer(DXVA2_CONTEXT(ctx)->decoder,
type,
&dxva_data_ptr, &dxva_size)))
return -1;
}
#endif
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 CONFIG_D3D11VA
if (ff_dxva2_is_d3d11(avctx))
if (FAILED(ID3D11VideoContext_ReleaseDecoderBuffer(D3D11VA_CONTEXT(ctx)->video_context, D3D11VA_CONTEXT(ctx)->decoder, type)))
return -1;
#endif
#if CONFIG_DXVA2
if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD)
if (FAILED(IDirectXVideoDecoder_ReleaseBuffer(DXVA2_CONTEXT(ctx)->decoder, type)))
return -1;
#endif
if (i < ctx_pic->slice_count)
return -1;
#if CONFIG_D3D11VA
if (ff_dxva2_is_d3d11(avctx)) {
D3D11_VIDEO_DECODER_BUFFER_DESC *dsc11 = bs;
memset(dsc11, 0, sizeof(*dsc11));
dsc11->BufferType = type;
dsc11->DataSize = current - dxva_data;
dsc11->NumMBsInBuffer = 0;
type = D3D11_VIDEO_DECODER_BUFFER_SLICE_CONTROL;
}
#endif
#if CONFIG_DXVA2
if (avctx->pix_fmt == AV_PIX_FMT_DXVA2_VLD) {
DXVA2_DecodeBufferDesc *dsc2 = bs;
memset(dsc2, 0, sizeof(*dsc2));
dsc2->CompressedBufferType = type;
dsc2->DataSize = current - dxva_data;
dsc2->NumMBsInBuffer = 0;
type = DXVA2_SliceControlBufferType;
}
#endif
slice_data = ctx_pic->slice_short;
slice_size = ctx_pic->slice_count * sizeof(*ctx_pic->slice_short);
av_assert0(((current - dxva_data) & 127) == 0);
return ff_dxva2_commit_buffer(avctx, ctx, sc,
type,
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;
AVDXVAContext *ctx = DXVA_CONTEXT(avctx);
struct hevc_dxva2_picture_context *ctx_pic = h->ref->hwaccel_picture_private;
if (!DXVA_CONTEXT_VALID(avctx, ctx))
return -1;
av_assert0(ctx_pic);
/* Fill up DXVA_PicParams_HEVC */
fill_picture_parameters(avctx, 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;
}
#if CONFIG_HEVC_DXVA2_HWACCEL
AVHWAccel ff_hevc_dxva2_hwaccel = {
.name = "hevc_dxva2",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_HEVC,
.pix_fmt = AV_PIX_FMT_DXVA2_VLD,
.init = ff_dxva2_decode_init,
.uninit = ff_dxva2_decode_uninit,
.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),
.priv_data_size = sizeof(FFDXVASharedContext),
};
#endif
#if CONFIG_HEVC_D3D11VA_HWACCEL
AVHWAccel ff_hevc_d3d11va_hwaccel = {
.name = "hevc_d3d11va",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_HEVC,
.pix_fmt = AV_PIX_FMT_D3D11VA_VLD,
.init = ff_dxva2_decode_init,
.uninit = ff_dxva2_decode_uninit,
.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),
.priv_data_size = sizeof(FFDXVASharedContext),
};
#endif
#if CONFIG_HEVC_D3D11VA2_HWACCEL
AVHWAccel ff_hevc_d3d11va2_hwaccel = {
.name = "hevc_d3d11va2",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_HEVC,
.pix_fmt = AV_PIX_FMT_D3D11,
.init = ff_dxva2_decode_init,
.uninit = ff_dxva2_decode_uninit,
.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),
.priv_data_size = sizeof(FFDXVASharedContext),
};
#endif
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