libavcodec/d3d12va_vc1.c - third_party/ffmpeg - Git at Google

 /*
  * Direct3D12 WMV3/VC-1 HW acceleration
  *
  * copyright (c) 2022-2023 Wu Jianhua <toqsxw@outlook.com>
  *
  * 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 "libavutil/avassert.h"
 #include "libavutil/hwcontext_d3d12va_internal.h"
 #include "mpegutils.h"
 #include "mpegvideodec.h"
 #include "vc1.h"
 #include "vc1data.h"
 #include "d3d12va_decode.h"
 #include "dxva2_internal.h"

 #define MAX_SLICES  1024
 #define INVALID_REF 0xffff

 typedef struct D3D12DecodePictureContext {
     DXVA_PictureParameters pp;
     unsigned               slice_count;
     DXVA_SliceInfo         slices[MAX_SLICES];
     const uint8_t         *bitstream;
     unsigned               bitstream_size;
 } D3D12DecodePictureContext;

 static int d3d12va_vc1_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer,  av_unused uint32_t size)
 {
     const VC1Context          *v       = avctx->priv_data;
     D3D12VADecodeContext      *ctx     = D3D12VA_DECODE_CONTEXT(avctx);
     D3D12DecodePictureContext *ctx_pic = v->s.current_picture_ptr->hwaccel_picture_private;

     if (!ctx)
         return -1;

     av_assert0(ctx_pic);

     ctx->used_mask = 0;

     ff_dxva2_vc1_fill_picture_parameters(avctx, (AVDXVAContext *)ctx, &ctx_pic->pp);
     ctx_pic->pp.wDeblockedPictureIndex = INVALID_REF;

     ctx_pic->bitstream      = NULL;
     ctx_pic->bitstream_size = 0;
     ctx_pic->slice_count    = 0;

     return 0;
 }

 static int d3d12va_vc1_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
 {
     const VC1Context          *v       = avctx->priv_data;
     D3D12DecodePictureContext *ctx_pic = v->s.current_picture_ptr->hwaccel_picture_private;

     if (ctx_pic->slice_count >= MAX_SLICES) {
         return AVERROR(ERANGE);
     }

     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;

     ff_dxva2_vc1_fill_slice(avctx, &ctx_pic->slices[ctx_pic->slice_count++],
                             buffer - ctx_pic->bitstream, size);

     return 0;
 }

 static int update_input_arguments(AVCodecContext *avctx, D3D12_VIDEO_DECODE_INPUT_STREAM_ARGUMENTS *input_args, ID3D12Resource *buffer)
 {
     const VC1Context *v                     = avctx->priv_data;
     const MpegEncContext      *s            = &v->s;
     D3D12DecodePictureContext *ctx_pic      = s->current_picture_ptr->hwaccel_picture_private;
     D3D12_VIDEO_DECODE_FRAME_ARGUMENT *args = &input_args->FrameArguments[input_args->NumFrameArguments++];

     const unsigned mb_count = s->mb_width * (s->mb_height >> v->field_mode);
     uint8_t *mapped_data, *mapped_ptr;

     static const uint8_t start_code[] = { 0, 0, 1, 0x0d };

     if (FAILED(ID3D12Resource_Map(buffer, 0, NULL, (void **)&mapped_data))) {
         av_log(avctx, AV_LOG_ERROR, "Failed to map D3D12 Buffer resource!\n");
         return AVERROR(EINVAL);
     }

     mapped_ptr = mapped_data;
     for (int i = 0; i < ctx_pic->slice_count; i++) {
         DXVA_SliceInfo *slice = &ctx_pic->slices[i];
         unsigned position     = slice->dwSliceDataLocation;
         unsigned size         = slice->dwSliceBitsInBuffer / 8;

         slice->dwSliceDataLocation = mapped_ptr - mapped_data;
         if (i < ctx_pic->slice_count - 1)
             slice->wNumberMBsInSlice = slice[1].wNumberMBsInSlice - slice[0].wNumberMBsInSlice;
         else
             slice->wNumberMBsInSlice = mb_count - slice[0].wNumberMBsInSlice;

         if (avctx->codec_id == AV_CODEC_ID_VC1) {
             memcpy(mapped_ptr, start_code, sizeof(start_code));
             if (i == 0 && v->second_field)
                 mapped_ptr[3] = 0x0c;
             else if (i > 0)
                 mapped_ptr[3] = 0x0b;

             mapped_ptr += sizeof(start_code);
             slice->dwSliceBitsInBuffer += sizeof(start_code) * 8;
         }

         memcpy(mapped_ptr, &ctx_pic->bitstream[position], size);
         mapped_ptr += size;
     }

     ID3D12Resource_Unmap(buffer, 0, NULL);

     args->Type  = D3D12_VIDEO_DECODE_ARGUMENT_TYPE_SLICE_CONTROL;
     args->Size  = sizeof(DXVA_SliceInfo) * ctx_pic->slice_count;
     args->pData = ctx_pic->slices;

     input_args->CompressedBitstream = (D3D12_VIDEO_DECODE_COMPRESSED_BITSTREAM){
         .pBuffer = buffer,
         .Offset  = 0,
         .Size    = mapped_ptr - mapped_data,
     };

     return 0;
 }

 static int d3d12va_vc1_end_frame(AVCodecContext *avctx)
 {
     const VC1Context          *v       = avctx->priv_data;
     D3D12DecodePictureContext *ctx_pic = v->s.current_picture_ptr->hwaccel_picture_private;

     if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0)
         return -1;

     return ff_d3d12va_common_end_frame(avctx, v->s.current_picture_ptr->f,
                                        &ctx_pic->pp, sizeof(ctx_pic->pp),
                                        NULL, 0,
                                        update_input_arguments);
 }

 static int d3d12va_vc1_decode_init(AVCodecContext *avctx)
 {
     int ret;
     D3D12VADecodeContext *ctx = D3D12VA_DECODE_CONTEXT(avctx);
     ctx->cfg.DecodeProfile = D3D12_VIDEO_DECODE_PROFILE_VC1_D2010;

     ctx->max_num_ref = 3;

     ret = ff_d3d12va_decode_init(avctx);
     if (ret < 0) {
         ctx->cfg.DecodeProfile = D3D12_VIDEO_DECODE_PROFILE_VC1;
         ret = ff_d3d12va_decode_init(avctx);
     }

     return ret;
 }

 #if CONFIG_WMV3_D3D12VA_HWACCEL
 const FFHWAccel ff_wmv3_d3d12va_hwaccel = {
     .p.name               = "wmv3_d3d12va",
     .p.type               = AVMEDIA_TYPE_VIDEO,
     .p.id                 = AV_CODEC_ID_WMV3,
     .p.pix_fmt            = AV_PIX_FMT_D3D12,
     .init                 = d3d12va_vc1_decode_init,
     .uninit               = ff_d3d12va_decode_uninit,
     .start_frame          = d3d12va_vc1_start_frame,
     .decode_slice         = d3d12va_vc1_decode_slice,
     .end_frame            = d3d12va_vc1_end_frame,
     .frame_params         = ff_d3d12va_common_frame_params,
     .frame_priv_data_size = sizeof(D3D12DecodePictureContext),
     .priv_data_size       = sizeof(D3D12VADecodeContext),
 };
 #endif

 #if CONFIG_VC1_D3D12VA_HWACCEL
 const FFHWAccel ff_vc1_d3d12va_hwaccel = {
     .p.name               = "vc1_d3d12va",
     .p.type               = AVMEDIA_TYPE_VIDEO,
     .p.id                 = AV_CODEC_ID_VC1,
     .p.pix_fmt            = AV_PIX_FMT_D3D12,
     .init                 = d3d12va_vc1_decode_init,
     .uninit               = ff_d3d12va_decode_uninit,
     .start_frame          = d3d12va_vc1_start_frame,
     .decode_slice         = d3d12va_vc1_decode_slice,
     .end_frame            = d3d12va_vc1_end_frame,
     .frame_params         = ff_d3d12va_common_frame_params,
     .frame_priv_data_size = sizeof(D3D12DecodePictureContext),
     .priv_data_size       = sizeof(D3D12VADecodeContext),
 };
 #endif
	/*
	* Direct3D12 WMV3/VC-1 HW acceleration
	*
	* copyright (c) 2022-2023 Wu Jianhua <toqsxw@outlook.com>
	*
	* 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 "libavutil/avassert.h"
	#include "libavutil/hwcontext_d3d12va_internal.h"
	#include "mpegutils.h"
	#include "mpegvideodec.h"
	#include "vc1.h"
	#include "vc1data.h"
	#include "d3d12va_decode.h"
	#include "dxva2_internal.h"

	#define MAX_SLICES 1024
	#define INVALID_REF 0xffff

	typedef struct D3D12DecodePictureContext {
	DXVA_PictureParameters pp;
	unsigned slice_count;
	DXVA_SliceInfo slices[MAX_SLICES];
	const uint8_t *bitstream;
	unsigned bitstream_size;
	} D3D12DecodePictureContext;

	static int d3d12va_vc1_start_frame(AVCodecContext avctx, av_unused const uint8_t buffer, av_unused uint32_t size)
	{
	const VC1Context *v = avctx->priv_data;
	D3D12VADecodeContext *ctx = D3D12VA_DECODE_CONTEXT(avctx);
	D3D12DecodePictureContext *ctx_pic = v->s.current_picture_ptr->hwaccel_picture_private;

	if (!ctx)
	return -1;

	av_assert0(ctx_pic);

	ctx->used_mask = 0;

	ff_dxva2_vc1_fill_picture_parameters(avctx, (AVDXVAContext *)ctx, &ctx_pic->pp);
	ctx_pic->pp.wDeblockedPictureIndex = INVALID_REF;

	ctx_pic->bitstream = NULL;
	ctx_pic->bitstream_size = 0;
	ctx_pic->slice_count = 0;

	return 0;
	}

	static int d3d12va_vc1_decode_slice(AVCodecContext avctx, const uint8_t buffer, uint32_t size)
	{
	const VC1Context *v = avctx->priv_data;
	D3D12DecodePictureContext *ctx_pic = v->s.current_picture_ptr->hwaccel_picture_private;

	if (ctx_pic->slice_count >= MAX_SLICES) {
	return AVERROR(ERANGE);
	}

	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;

	ff_dxva2_vc1_fill_slice(avctx, &ctx_pic->slices[ctx_pic->slice_count++],
	buffer - ctx_pic->bitstream, size);

	return 0;
	}

	static int update_input_arguments(AVCodecContext avctx, D3D12_VIDEO_DECODE_INPUT_STREAM_ARGUMENTS input_args, ID3D12Resource *buffer)
	{
	const VC1Context *v = avctx->priv_data;
	const MpegEncContext *s = &v->s;
	D3D12DecodePictureContext *ctx_pic = s->current_picture_ptr->hwaccel_picture_private;
	D3D12_VIDEO_DECODE_FRAME_ARGUMENT *args = &input_args->FrameArguments[input_args->NumFrameArguments++];

	const unsigned mb_count = s->mb_width * (s->mb_height >> v->field_mode);
	uint8_t mapped_data, mapped_ptr;

	static const uint8_t start_code[] = { 0, 0, 1, 0x0d };

	if (FAILED(ID3D12Resource_Map(buffer, 0, NULL, (void **)&mapped_data))) {
	av_log(avctx, AV_LOG_ERROR, "Failed to map D3D12 Buffer resource!\n");
	return AVERROR(EINVAL);
	}

	mapped_ptr = mapped_data;
	for (int i = 0; i < ctx_pic->slice_count; i++) {
	DXVA_SliceInfo *slice = &ctx_pic->slices[i];
	unsigned position = slice->dwSliceDataLocation;
	unsigned size = slice->dwSliceBitsInBuffer / 8;

	slice->dwSliceDataLocation = mapped_ptr - mapped_data;
	if (i < ctx_pic->slice_count - 1)
	slice->wNumberMBsInSlice = slice[1].wNumberMBsInSlice - slice[0].wNumberMBsInSlice;
	else
	slice->wNumberMBsInSlice = mb_count - slice[0].wNumberMBsInSlice;

	if (avctx->codec_id == AV_CODEC_ID_VC1) {
	memcpy(mapped_ptr, start_code, sizeof(start_code));
	if (i == 0 && v->second_field)
	mapped_ptr[3] = 0x0c;
	else if (i > 0)
	mapped_ptr[3] = 0x0b;

	mapped_ptr += sizeof(start_code);
	slice->dwSliceBitsInBuffer += sizeof(start_code) * 8;
	}

	memcpy(mapped_ptr, &ctx_pic->bitstream[position], size);
	mapped_ptr += size;
	}

	ID3D12Resource_Unmap(buffer, 0, NULL);

	args->Type = D3D12_VIDEO_DECODE_ARGUMENT_TYPE_SLICE_CONTROL;
	args->Size = sizeof(DXVA_SliceInfo) * ctx_pic->slice_count;
	args->pData = ctx_pic->slices;

	input_args->CompressedBitstream = (D3D12_VIDEO_DECODE_COMPRESSED_BITSTREAM){
	.pBuffer = buffer,
	.Offset = 0,
	.Size = mapped_ptr - mapped_data,
	};

	return 0;
	}

	static int d3d12va_vc1_end_frame(AVCodecContext *avctx)
	{
	const VC1Context *v = avctx->priv_data;
	D3D12DecodePictureContext *ctx_pic = v->s.current_picture_ptr->hwaccel_picture_private;

	if (ctx_pic->slice_count <= 0 \|\| ctx_pic->bitstream_size <= 0)
	return -1;

	return ff_d3d12va_common_end_frame(avctx, v->s.current_picture_ptr->f,
	&ctx_pic->pp, sizeof(ctx_pic->pp),
	NULL, 0,
	update_input_arguments);
	}

	static int d3d12va_vc1_decode_init(AVCodecContext *avctx)
	{
	int ret;
	D3D12VADecodeContext *ctx = D3D12VA_DECODE_CONTEXT(avctx);
	ctx->cfg.DecodeProfile = D3D12_VIDEO_DECODE_PROFILE_VC1_D2010;

	ctx->max_num_ref = 3;

	ret = ff_d3d12va_decode_init(avctx);
	if (ret < 0) {
	ctx->cfg.DecodeProfile = D3D12_VIDEO_DECODE_PROFILE_VC1;
	ret = ff_d3d12va_decode_init(avctx);
	}

	return ret;
	}

	#if CONFIG_WMV3_D3D12VA_HWACCEL
	const FFHWAccel ff_wmv3_d3d12va_hwaccel = {
	.p.name = "wmv3_d3d12va",
	.p.type = AVMEDIA_TYPE_VIDEO,
	.p.id = AV_CODEC_ID_WMV3,
	.p.pix_fmt = AV_PIX_FMT_D3D12,
	.init = d3d12va_vc1_decode_init,
	.uninit = ff_d3d12va_decode_uninit,
	.start_frame = d3d12va_vc1_start_frame,
	.decode_slice = d3d12va_vc1_decode_slice,
	.end_frame = d3d12va_vc1_end_frame,
	.frame_params = ff_d3d12va_common_frame_params,
	.frame_priv_data_size = sizeof(D3D12DecodePictureContext),
	.priv_data_size = sizeof(D3D12VADecodeContext),
	};
	#endif

	#if CONFIG_VC1_D3D12VA_HWACCEL
	const FFHWAccel ff_vc1_d3d12va_hwaccel = {
	.p.name = "vc1_d3d12va",
	.p.type = AVMEDIA_TYPE_VIDEO,
	.p.id = AV_CODEC_ID_VC1,
	.p.pix_fmt = AV_PIX_FMT_D3D12,
	.init = d3d12va_vc1_decode_init,
	.uninit = ff_d3d12va_decode_uninit,
	.start_frame = d3d12va_vc1_start_frame,
	.decode_slice = d3d12va_vc1_decode_slice,
	.end_frame = d3d12va_vc1_end_frame,
	.frame_params = ff_d3d12va_common_frame_params,
	.frame_priv_data_size = sizeof(D3D12DecodePictureContext),
	.priv_data_size = sizeof(D3D12VADecodeContext),
	};
	#endif