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/*
* Direct3D 12 AV1 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 "libavutil/mem.h"
#include "av1dec.h"
#include "dxva2_internal.h"
#include "d3d12va_decode.h"
#define MAX_TILES 256
typedef struct D3D12AV1DecodeContext {
D3D12VADecodeContext ctx;
uint8_t *bitstream_buffer;
} D3D12AV1DecodeContext;
#define D3D12_AV1_DECODE_CONTEXT(avctx) ((D3D12AV1DecodeContext *)D3D12VA_DECODE_CONTEXT(avctx))
typedef struct AV1DecodePictureContext {
DXVA_PicParams_AV1 pp;
unsigned tile_count;
DXVA_Tile_AV1 tiles[MAX_TILES];
uint8_t *bitstream;
unsigned bitstream_size;
} AV1DecodePictureContext;
static int d3d12va_av1_start_frame(AVCodecContext *avctx, av_unused const uint8_t *buffer, av_unused uint32_t size)
{
const AV1DecContext *h = avctx->priv_data;
AV1DecodePictureContext *ctx_pic = h->cur_frame.hwaccel_picture_private;
D3D12VADecodeContext *ctx = D3D12VA_DECODE_CONTEXT(avctx);
if (!ctx)
return -1;
av_assert0(ctx_pic);
ctx->used_mask = 0;
if (ff_dxva2_av1_fill_picture_parameters(avctx, (AVDXVAContext *)ctx, &ctx_pic->pp) < 0)
return -1;
ctx_pic->bitstream = NULL;
ctx_pic->bitstream_size = 0;
ctx_pic->tile_count = 0;
return 0;
}
static int d3d12va_av1_decode_slice(AVCodecContext *avctx,
const uint8_t *buffer,
uint32_t size)
{
const AV1DecContext *h = avctx->priv_data;
const AV1RawFrameHeader *frame_header = h->raw_frame_header;
AV1DecodePictureContext *ctx_pic = h->cur_frame.hwaccel_picture_private;
int offset = 0;
uint32_t tg_start, tg_end;
ctx_pic->tile_count = frame_header->tile_cols * frame_header->tile_rows;
if (ctx_pic->tile_count > MAX_TILES)
return AVERROR(ENOSYS);
if (ctx_pic->tile_count == h->tg_end - h->tg_start + 1) {
tg_start = 0;
tg_end = ctx_pic->tile_count - 1;
ctx_pic->bitstream = (uint8_t *)buffer;
ctx_pic->bitstream_size = size;
} else {
ctx_pic->bitstream = D3D12_AV1_DECODE_CONTEXT(avctx)->bitstream_buffer;
memcpy(ctx_pic->bitstream + ctx_pic->bitstream_size, buffer, size);
tg_start = h->tg_start;
tg_end = h->tg_end;
offset = ctx_pic->bitstream_size;
ctx_pic->bitstream_size += size;
}
for (uint32_t tile_num = tg_start; tile_num <= tg_end; tile_num++) {
ctx_pic->tiles[tile_num].DataOffset = offset + h->tile_group_info[tile_num].tile_offset;
ctx_pic->tiles[tile_num].DataSize = h->tile_group_info[tile_num].tile_size;
ctx_pic->tiles[tile_num].row = h->tile_group_info[tile_num].tile_row;
ctx_pic->tiles[tile_num].column = h->tile_group_info[tile_num].tile_column;
ctx_pic->tiles[tile_num].anchor_frame = 0xFF;
}
return 0;
}
static int update_input_arguments(AVCodecContext *avctx, D3D12_VIDEO_DECODE_INPUT_STREAM_ARGUMENTS *input_args, ID3D12Resource *buffer)
{
const AV1DecContext *h = avctx->priv_data;
AV1DecodePictureContext *ctx_pic = h->cur_frame.hwaccel_picture_private;
void *mapped_data;
D3D12_VIDEO_DECODE_FRAME_ARGUMENT *args = &input_args->FrameArguments[input_args->NumFrameArguments++];
args->Type = D3D12_VIDEO_DECODE_ARGUMENT_TYPE_SLICE_CONTROL;
args->Size = sizeof(DXVA_Tile_AV1) * ctx_pic->tile_count;
args->pData = ctx_pic->tiles;
input_args->CompressedBitstream = (D3D12_VIDEO_DECODE_COMPRESSED_BITSTREAM){
.pBuffer = buffer,
.Offset = 0,
.Size = ctx_pic->bitstream_size,
};
if (FAILED(ID3D12Resource_Map(buffer, 0, NULL, &mapped_data))) {
av_log(avctx, AV_LOG_ERROR, "Failed to map D3D12 Buffer resource!\n");
return AVERROR(EINVAL);
}
memcpy(mapped_data, ctx_pic->bitstream, ctx_pic->bitstream_size);
ID3D12Resource_Unmap(buffer, 0, NULL);
return 0;
}
static int d3d12va_av1_end_frame(AVCodecContext *avctx)
{
int ret;
const AV1DecContext *h = avctx->priv_data;
AV1DecodePictureContext *ctx_pic = h->cur_frame.hwaccel_picture_private;
if (ctx_pic->tiles <= 0 || ctx_pic->bitstream_size <= 0)
return -1;
ret = ff_d3d12va_common_end_frame(avctx, h->cur_frame.f, &ctx_pic->pp, sizeof(ctx_pic->pp),
NULL, 0, update_input_arguments);
return ret;
}
static int d3d12va_av1_decode_init(AVCodecContext *avctx)
{
D3D12VADecodeContext *ctx = D3D12VA_DECODE_CONTEXT(avctx);
D3D12AV1DecodeContext *av1_ctx = D3D12_AV1_DECODE_CONTEXT(avctx);
DXVA_PicParams_AV1 pp;
int ret;
if (avctx->profile != AV_PROFILE_AV1_MAIN)
return AVERROR(EINVAL);
ctx->cfg.DecodeProfile = D3D12_VIDEO_DECODE_PROFILE_AV1_PROFILE0;
ctx->max_num_ref = FF_ARRAY_ELEMS(pp.RefFrameMapTextureIndex) + 1;
ret = ff_d3d12va_decode_init(avctx);
if (ret < 0)
return ret;
if (!av1_ctx->bitstream_buffer) {
av1_ctx->bitstream_buffer = av_malloc(ff_d3d12va_get_suitable_max_bitstream_size(avctx));
if (!av1_ctx->bitstream_buffer)
return AVERROR(ENOMEM);
}
return 0;
}
static int d3d12va_av1_decode_uninit(AVCodecContext *avctx)
{
D3D12AV1DecodeContext *ctx = D3D12_AV1_DECODE_CONTEXT(avctx);
if (ctx->bitstream_buffer)
av_freep(&ctx->bitstream_buffer);
return ff_d3d12va_decode_uninit(avctx);
}
#if CONFIG_AV1_D3D12VA_HWACCEL
const FFHWAccel ff_av1_d3d12va_hwaccel = {
.p.name = "av1_d3d12va",
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_AV1,
.p.pix_fmt = AV_PIX_FMT_D3D12,
.init = d3d12va_av1_decode_init,
.uninit = d3d12va_av1_decode_uninit,
.start_frame = d3d12va_av1_start_frame,
.decode_slice = d3d12va_av1_decode_slice,
.end_frame = d3d12va_av1_end_frame,
.frame_params = ff_d3d12va_common_frame_params,
.frame_priv_data_size = sizeof(AV1DecodePictureContext),
.priv_data_size = sizeof(D3D12AV1DecodeContext),
};
#endif
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