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FFmpeg/libavcodec/dxva2_vc1.c
Andreas Rheinhardt fe6037fd04 avcodec/mpegpicture: Split MPVPicture into WorkPicture and ordinary Pic 
There are two types of MPVPictures: Three (cur_pic, last_pic, next_pic)
that are directly part of MpegEncContext and an array of MPVPictures
that are separately allocated and are mostly accessed via pointers
(cur|last|next)_pic_ptr; they are also used to store AVFrames in the
encoder (necessary due to B-frames). As the name implies, each of the
former is directly associated with one of the _ptr pointers:
They actually share the same underlying buffers, but the ones
that are part of the context can have their data pointers offset
and their linesize doubled for field pictures.

Up until now, each of these had their own references; in particular,
there was an underlying av_frame_ref() to sync cur_pic and cur_pic_ptr
etc. This is wasteful.

This commit changes this relationship: cur_pic, last_pic and next_pic
now become MPVWorkPictures; this structure does not have an AVFrame
at all any more, but only the cached values of data and linesize.
It also contains a pointer to the corresponding MPVPicture, establishing
a more natural relationsship between the two.
This already means that creating the context-pictures from the pointers
can no longer fail.

What has not been changed is the fact that the MPVPicture* pointers
are not ownership pointers and that the MPVPictures are part of an
array of MPVPictures that is owned by a single AVCodecContext.
Doing so will be done in a latter commit.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-06-12 11:38:13 +02:00

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/*
* DXVA2 WMV3/VC-1 HW acceleration.
*
* copyright (c) 2010 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 "config_components.h"
#include "dxva2_internal.h"
#include "hwaccel_internal.h"
#include "mpegutils.h"
#include "mpegvideodec.h"
#include "vc1.h"
#include "vc1data.h"
#define MAX_SLICES 1024
struct dxva2_picture_context {
DXVA_PictureParameters pp;
unsigned slice_count;
DXVA_SliceInfo slice[MAX_SLICES];
const uint8_t *bitstream;
unsigned bitstream_size;
};
void ff_dxva2_vc1_fill_picture_parameters(AVCodecContext *avctx,
AVDXVAContext *ctx,
DXVA_PictureParameters *pp)
{
const VC1Context *v = avctx->priv_data;
const MpegEncContext *s = &v->s;
const MPVPicture *current_picture = s->cur_pic.ptr;
int intcomp = 0;
// determine if intensity compensation is needed
if (s->pict_type == AV_PICTURE_TYPE_P) {
if ((v->fcm == ILACE_FRAME && v->intcomp) || (v->fcm != ILACE_FRAME && v->mv_mode == MV_PMODE_INTENSITY_COMP)) {
if (v->lumscale != 32 || v->lumshift != 0 || (s->picture_structure != PICT_FRAME && (v->lumscale2 != 32 || v->lumshift2 != 0)))
intcomp = 1;
}
}
memset(pp, 0, sizeof(*pp));
if (s->pict_type != AV_PICTURE_TYPE_I && !v->bi_type && s->last_pic.ptr)
pp->wForwardRefPictureIndex = ff_dxva2_get_surface_index(avctx, ctx, s->last_pic.ptr->f, 0);
else
pp->wForwardRefPictureIndex = 0xffff;
if (s->pict_type == AV_PICTURE_TYPE_B && !v->bi_type && s->next_pic.ptr)
pp->wBackwardRefPictureIndex = ff_dxva2_get_surface_index(avctx, ctx, s->next_pic.ptr->f, 0);
else
pp->wBackwardRefPictureIndex = 0xffff;
pp->wDecodedPictureIndex =
pp->wDeblockedPictureIndex = ff_dxva2_get_surface_index(avctx, ctx, current_picture->f, 1);
if (v->profile == PROFILE_ADVANCED) {
/* It is the cropped width/height -1 of the frame */
pp->wPicWidthInMBminus1 = avctx->width - 1;
pp->wPicHeightInMBminus1= avctx->height - 1;
} else {
/* It is the coded width/height in macroblock -1 of the frame */
pp->wPicWidthInMBminus1 = s->mb_width - 1;
pp->wPicHeightInMBminus1= s->mb_height - 1;
}
pp->bMacroblockWidthMinus1 = 15;
pp->bMacroblockHeightMinus1 = 15;
pp->bBlockWidthMinus1 = 7;
pp->bBlockHeightMinus1 = 7;
pp->bBPPminus1 = 7;
if (s->picture_structure & PICT_TOP_FIELD)
pp->bPicStructure |= 0x01;
if (s->picture_structure & PICT_BOTTOM_FIELD)
pp->bPicStructure |= 0x02;
pp->bSecondField = v->interlace && v->fcm == ILACE_FIELD && v->second_field;
pp->bPicIntra = s->pict_type == AV_PICTURE_TYPE_I || v->bi_type;
pp->bPicBackwardPrediction = s->pict_type == AV_PICTURE_TYPE_B && !v->bi_type;
pp->bBidirectionalAveragingMode = (1 << 7) |
((DXVA_CONTEXT_CFG_INTRARESID(avctx, ctx) != 0) << 6) |
((DXVA_CONTEXT_CFG_RESIDACCEL(avctx, ctx) != 0) << 5) |
(intcomp << 4) |
((v->profile == PROFILE_ADVANCED) << 3);
pp->bMVprecisionAndChromaRelation = ((v->mv_mode == MV_PMODE_1MV_HPEL_BILIN) << 3) |
(1 << 2) |
(0 << 1) |
(!s->quarter_sample );
pp->bChromaFormat = v->chromaformat;
DXVA_CONTEXT_REPORT_ID(avctx, ctx)++;
if (DXVA_CONTEXT_REPORT_ID(avctx, ctx) >= (1 << 16))
DXVA_CONTEXT_REPORT_ID(avctx, ctx) = 1;
pp->bPicScanFixed = DXVA_CONTEXT_REPORT_ID(avctx, ctx) >> 8;
pp->bPicScanMethod = DXVA_CONTEXT_REPORT_ID(avctx, ctx) & 0xff;
pp->bPicReadbackRequests = 0;
pp->bRcontrol = v->rnd;
pp->bPicSpatialResid8 = (v->panscanflag << 7) |
(v->refdist_flag << 6) |
(s->loop_filter << 5) |
(v->fastuvmc << 4) |
(v->extended_mv << 3) |
(v->dquant << 1) |
(v->vstransform );
pp->bPicOverflowBlocks = (v->quantizer_mode << 6) |
(v->multires << 5) |
(v->resync_marker << 4) |
(v->rangered << 3) |
(s->max_b_frames );
pp->bPicExtrapolation = (!v->interlace || v->fcm == PROGRESSIVE) ? 1 : 2;
pp->bPicDeblocked = ((!pp->bPicBackwardPrediction && v->overlap) << 6) |
((v->profile != PROFILE_ADVANCED && v->rangeredfrm) << 5) |
(s->loop_filter << 1);
pp->bPicDeblockConfined = (v->postprocflag << 7) |
(v->broadcast << 6) |
(v->interlace << 5) |
(v->tfcntrflag << 4) |
(v->finterpflag << 3) |
((s->pict_type != AV_PICTURE_TYPE_B) << 2) |
(v->psf << 1) |
(v->extended_dmv );
if (s->pict_type != AV_PICTURE_TYPE_I)
pp->bPic4MVallowed = v->mv_mode == MV_PMODE_MIXED_MV ||
(v->mv_mode == MV_PMODE_INTENSITY_COMP &&
v->mv_mode2 == MV_PMODE_MIXED_MV);
if (v->profile == PROFILE_ADVANCED)
pp->bPicOBMC = (v->range_mapy_flag << 7) |
(v->range_mapy << 4) |
(v->range_mapuv_flag << 3) |
(v->range_mapuv );
pp->bPicBinPB = 0;
pp->bMV_RPS = (v->fcm == ILACE_FIELD && pp->bPicBackwardPrediction) ? v->refdist + 9 : 0;
pp->bReservedBits = v->pq;
if (s->picture_structure == PICT_FRAME) {
if (intcomp) {
pp->wBitstreamFcodes = v->lumscale;
pp->wBitstreamPCEelements = v->lumshift;
} else {
pp->wBitstreamFcodes = 32;
pp->wBitstreamPCEelements = 0;
}
} else {
/* Syntax: (top_field_param << 8) | bottom_field_param */
if (intcomp) {
pp->wBitstreamFcodes = (v->lumscale << 8) | v->lumscale2;
pp->wBitstreamPCEelements = (v->lumshift << 8) | v->lumshift2;
} else {
pp->wBitstreamFcodes = (32 << 8) | 32;
pp->wBitstreamPCEelements = 0;
}
}
pp->bBitstreamConcealmentNeed = 0;
pp->bBitstreamConcealmentMethod = 0;
}
void ff_dxva2_vc1_fill_slice(AVCodecContext *avctx, DXVA_SliceInfo *slice,
unsigned position, unsigned size)
{
const VC1Context *v = avctx->priv_data;
const MpegEncContext *s = &v->s;
memset(slice, 0, sizeof(*slice));
slice->wHorizontalPosition = 0;
slice->wVerticalPosition = s->mb_y;
slice->dwSliceBitsInBuffer = 8 * size;
slice->dwSliceDataLocation = position;
slice->bStartCodeBitOffset = 0;
slice->bReservedBits = (s->pict_type == AV_PICTURE_TYPE_B && !v->bi_type) ? v->bfraction_lut_index + 9 : 0;
slice->wMBbitOffset = v->p_frame_skipped ? 0xffff : get_bits_count(&s->gb) + (avctx->codec_id == AV_CODEC_ID_VC1 ? 32 : 0);
/* XXX We store the index of the first MB and it will be fixed later */
slice->wNumberMBsInSlice = (s->mb_y >> v->field_mode) * s->mb_width + s->mb_x;
slice->wQuantizerScaleCode = v->pq;
slice->wBadSliceChopping = 0;
}
static int commit_bitstream_and_slice_buffer(AVCodecContext *avctx,
DECODER_BUFFER_DESC *bs,
DECODER_BUFFER_DESC *sc)
{
const VC1Context *v = avctx->priv_data;
AVDXVAContext *ctx = DXVA_CONTEXT(avctx);
const MpegEncContext *s = &v->s;
struct dxva2_picture_context *ctx_pic = s->cur_pic.ptr->hwaccel_picture_private;
static const uint8_t start_code[] = { 0, 0, 1, 0x0d };
const unsigned start_code_size = avctx->codec_id == AV_CODEC_ID_VC1 ? sizeof(start_code) : 0;
const unsigned mb_count = s->mb_width * (s->mb_height >> v->field_mode);
DXVA_SliceInfo *slice = NULL;
void *dxva_data_ptr;
uint8_t *dxva_data, *current, *end;
unsigned dxva_size;
unsigned padding;
unsigned i;
unsigned type;
#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++) {
unsigned position, size;
slice = &ctx_pic->slice[i];
position = slice->dwSliceDataLocation;
size = slice->dwSliceBitsInBuffer / 8;
if (start_code_size + size > end - current) {
av_log(avctx, AV_LOG_ERROR, "Failed to build bitstream");
break;
}
slice->dwSliceDataLocation = current - dxva_data;
if (i < ctx_pic->slice_count - 1)
slice->wNumberMBsInSlice =
slice[1].wNumberMBsInSlice - slice[0].wNumberMBsInSlice;
else
slice->wNumberMBsInSlice =
mb_count - slice[0].wNumberMBsInSlice;
/* write the appropriate frame, field or slice start code */
if (start_code_size) {
memcpy(current, start_code, start_code_size);
if (i == 0 && v->second_field)
current[3] = 0x0c;
else if (i > 0)
current[3] = 0x0b;
current += start_code_size;
slice->dwSliceBitsInBuffer += start_code_size * 8;
}
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->dwSliceBitsInBuffer += padding * 8;
}
#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 = mb_count;
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 = mb_count;
type = DXVA2_SliceControlBufferType;
}
#endif
return ff_dxva2_commit_buffer(avctx, ctx, sc,
type,
ctx_pic->slice,
ctx_pic->slice_count * sizeof(*ctx_pic->slice),
mb_count);
}
static int dxva2_vc1_start_frame(AVCodecContext *avctx,
av_unused const uint8_t *buffer,
av_unused uint32_t size)
{
const VC1Context *v = avctx->priv_data;
AVDXVAContext *ctx = DXVA_CONTEXT(avctx);
struct dxva2_picture_context *ctx_pic = v->s.cur_pic.ptr->hwaccel_picture_private;
if (!DXVA_CONTEXT_VALID(avctx, ctx))
return -1;
av_assert0(ctx_pic);
ff_dxva2_vc1_fill_picture_parameters(avctx, ctx, &ctx_pic->pp);
ctx_pic->slice_count = 0;
ctx_pic->bitstream_size = 0;
ctx_pic->bitstream = NULL;
return 0;
}
static int dxva2_vc1_decode_slice(AVCodecContext *avctx,
const uint8_t *buffer,
uint32_t size)
{
const VC1Context *v = avctx->priv_data;
const MPVPicture *current_picture = v->s.cur_pic.ptr;
struct dxva2_picture_context *ctx_pic = current_picture->hwaccel_picture_private;
unsigned position;
if (ctx_pic->slice_count >= MAX_SLICES) {
avpriv_request_sample(avctx, "%d slices in dxva2",
ctx_pic->slice_count);
return -1;
}
if (avctx->codec_id == AV_CODEC_ID_VC1 &&
size >= 4 && IS_MARKER(AV_RB32(buffer))) {
buffer += 4;
size -= 4;
}
if (!ctx_pic->bitstream)
ctx_pic->bitstream = buffer;
ctx_pic->bitstream_size += size;
position = buffer - ctx_pic->bitstream;
ff_dxva2_vc1_fill_slice(avctx, &ctx_pic->slice[ctx_pic->slice_count++], position, size);
return 0;
}
static int dxva2_vc1_end_frame(AVCodecContext *avctx)
{
VC1Context *v = avctx->priv_data;
struct dxva2_picture_context *ctx_pic = v->s.cur_pic.ptr->hwaccel_picture_private;
int ret;
if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0)
return -1;
ret = ff_dxva2_common_end_frame(avctx, v->s.cur_pic.ptr->f,
&ctx_pic->pp, sizeof(ctx_pic->pp),
NULL, 0,
commit_bitstream_and_slice_buffer);
return ret;
}
#if CONFIG_WMV3_DXVA2_HWACCEL
const FFHWAccel ff_wmv3_dxva2_hwaccel = {
.p.name = "wmv3_dxva2",
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_WMV3,
.p.pix_fmt = AV_PIX_FMT_DXVA2_VLD,
.init = ff_dxva2_decode_init,
.uninit = ff_dxva2_decode_uninit,
.start_frame = dxva2_vc1_start_frame,
.decode_slice = dxva2_vc1_decode_slice,
.end_frame = dxva2_vc1_end_frame,
.frame_params = ff_dxva2_common_frame_params,
.frame_priv_data_size = sizeof(struct dxva2_picture_context),
.priv_data_size = sizeof(FFDXVASharedContext),
};
#endif
#if CONFIG_VC1_DXVA2_HWACCEL
const FFHWAccel ff_vc1_dxva2_hwaccel = {
.p.name = "vc1_dxva2",
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_VC1,
.p.pix_fmt = AV_PIX_FMT_DXVA2_VLD,
.init = ff_dxva2_decode_init,
.uninit = ff_dxva2_decode_uninit,
.start_frame = dxva2_vc1_start_frame,
.decode_slice = dxva2_vc1_decode_slice,
.end_frame = dxva2_vc1_end_frame,
.frame_params = ff_dxva2_common_frame_params,
.frame_priv_data_size = sizeof(struct dxva2_picture_context),
.priv_data_size = sizeof(FFDXVASharedContext),
};
#endif
#if CONFIG_WMV3_D3D11VA_HWACCEL
const FFHWAccel ff_wmv3_d3d11va_hwaccel = {
.p.name = "wmv3_d3d11va",
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_WMV3,
.p.pix_fmt = AV_PIX_FMT_D3D11VA_VLD,
.init = ff_dxva2_decode_init,
.uninit = ff_dxva2_decode_uninit,
.start_frame = dxva2_vc1_start_frame,
.decode_slice = dxva2_vc1_decode_slice,
.end_frame = dxva2_vc1_end_frame,
.frame_params = ff_dxva2_common_frame_params,
.frame_priv_data_size = sizeof(struct dxva2_picture_context),
.priv_data_size = sizeof(FFDXVASharedContext),
};
#endif
#if CONFIG_WMV3_D3D11VA2_HWACCEL
const FFHWAccel ff_wmv3_d3d11va2_hwaccel = {
.p.name = "wmv3_d3d11va2",
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_WMV3,
.p.pix_fmt = AV_PIX_FMT_D3D11,
.init = ff_dxva2_decode_init,
.uninit = ff_dxva2_decode_uninit,
.start_frame = dxva2_vc1_start_frame,
.decode_slice = dxva2_vc1_decode_slice,
.end_frame = dxva2_vc1_end_frame,
.frame_params = ff_dxva2_common_frame_params,
.frame_priv_data_size = sizeof(struct dxva2_picture_context),
.priv_data_size = sizeof(FFDXVASharedContext),
};
#endif
#if CONFIG_VC1_D3D11VA_HWACCEL
const FFHWAccel ff_vc1_d3d11va_hwaccel = {
.p.name = "vc1_d3d11va",
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_VC1,
.p.pix_fmt = AV_PIX_FMT_D3D11VA_VLD,
.init = ff_dxva2_decode_init,
.uninit = ff_dxva2_decode_uninit,
.start_frame = dxva2_vc1_start_frame,
.decode_slice = dxva2_vc1_decode_slice,
.end_frame = dxva2_vc1_end_frame,
.frame_params = ff_dxva2_common_frame_params,
.frame_priv_data_size = sizeof(struct dxva2_picture_context),
.priv_data_size = sizeof(FFDXVASharedContext),
};
#endif
#if CONFIG_VC1_D3D11VA2_HWACCEL
const FFHWAccel ff_vc1_d3d11va2_hwaccel = {
.p.name = "vc1_d3d11va2",
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_VC1,
.p.pix_fmt = AV_PIX_FMT_D3D11,
.init = ff_dxva2_decode_init,
.uninit = ff_dxva2_decode_uninit,
.start_frame = dxva2_vc1_start_frame,
.decode_slice = dxva2_vc1_decode_slice,
.end_frame = dxva2_vc1_end_frame,
.frame_params = ff_dxva2_common_frame_params,
.frame_priv_data_size = sizeof(struct dxva2_picture_context),
.priv_data_size = sizeof(FFDXVASharedContext),
};
#endif
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