1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
/*
* Direct3D 12 h264 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 "h264dec.h"
#include "h264data.h"
#include "h264_ps.h"
#include "mpegutils.h"
#include "dxva2_internal.h"
#include "d3d12va_decode.h"
#include "libavutil/hwcontext_d3d12va_internal.h"
#include <dxva.h>
typedef struct H264DecodePictureContext {
DXVA_PicParams_H264 pp;
DXVA_Qmatrix_H264 qm;
unsigned slice_count;
DXVA_Slice_H264_Short slice_short[MAX_SLICES];
const uint8_t *bitstream;
unsigned bitstream_size;
} H264DecodePictureContext;
static void fill_slice_short(DXVA_Slice_H264_Short *slice,
unsigned position, unsigned size)
{
memset(slice, 0, sizeof(*slice));
slice->BSNALunitDataLocation = position;
slice->SliceBytesInBuffer = size;
slice->wBadSliceChopping = 0;
}
static int d3d12va_h264_start_frame(AVCodecContext *avctx,
av_unused const uint8_t *buffer,
av_unused uint32_t size)
{
const H264Context *h = avctx->priv_data;
H264DecodePictureContext *ctx_pic = h->cur_pic_ptr->hwaccel_picture_private;
D3D12VADecodeContext *ctx = D3D12VA_DECODE_CONTEXT(avctx);
if (!ctx)
return -1;
assert(ctx_pic);
ctx->used_mask = 0;
ff_dxva2_h264_fill_picture_parameters(avctx, (AVDXVAContext *)ctx, &ctx_pic->pp);
ff_dxva2_h264_fill_scaling_lists(avctx, (AVDXVAContext *)ctx, &ctx_pic->qm);
ctx_pic->slice_count = 0;
ctx_pic->bitstream_size = 0;
ctx_pic->bitstream = NULL;
return 0;
}
static int d3d12va_h264_decode_slice(AVCodecContext *avctx, const uint8_t *buffer, uint32_t size)
{
unsigned position;
const H264Context *h = avctx->priv_data;
const H264SliceContext *sl = &h->slice_ctx[0];
const H264Picture *current_picture = h->cur_pic_ptr;
H264DecodePictureContext *ctx_pic = current_picture->hwaccel_picture_private;
if (ctx_pic->slice_count >= MAX_SLICES)
return AVERROR(ERANGE);
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++;
if (sl->slice_type != AV_PICTURE_TYPE_I && sl->slice_type != AV_PICTURE_TYPE_SI)
ctx_pic->pp.wBitFields &= ~(1 << 15); /* Set IntraPicFlag to 0 */
return 0;
}
#define START_CODE 65536
#define START_CODE_SIZE 3
static int update_input_arguments(AVCodecContext *avctx, D3D12_VIDEO_DECODE_INPUT_STREAM_ARGUMENTS *input_args, ID3D12Resource *buffer)
{
D3D12VADecodeContext *ctx = D3D12VA_DECODE_CONTEXT(avctx);
AVHWFramesContext *frames_ctx = D3D12VA_FRAMES_CONTEXT(avctx);
AVD3D12VAFramesContext *frames_hwctx = frames_ctx->hwctx;
const H264Context *h = avctx->priv_data;
const H264Picture *current_picture = h->cur_pic_ptr;
H264DecodePictureContext *ctx_pic = current_picture->hwaccel_picture_private;
int i;
uint8_t *mapped_data, *mapped_ptr;
DXVA_Slice_H264_Short *slice;
D3D12_VIDEO_DECODE_FRAME_ARGUMENT *args;
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);
}
mapped_ptr = mapped_data;
for (i = 0; i < ctx_pic->slice_count; i++) {
UINT position, size;
slice = &ctx_pic->slice_short[i];
position = slice->BSNALunitDataLocation;
size = slice->SliceBytesInBuffer;
slice->SliceBytesInBuffer += START_CODE_SIZE;
slice->BSNALunitDataLocation = mapped_ptr - mapped_data;
*(uint32_t *)mapped_ptr = START_CODE;
mapped_ptr += START_CODE_SIZE;
memcpy(mapped_ptr, &ctx_pic->bitstream[position], size);
mapped_ptr += size;
}
ID3D12Resource_Unmap(buffer, 0, NULL);
input_args->CompressedBitstream = (D3D12_VIDEO_DECODE_COMPRESSED_BITSTREAM){
.pBuffer = buffer,
.Offset = 0,
.Size = mapped_ptr - mapped_data,
};
args = &input_args->FrameArguments[input_args->NumFrameArguments++];
args->Type = D3D12_VIDEO_DECODE_ARGUMENT_TYPE_SLICE_CONTROL;
args->Size = sizeof(DXVA_Slice_H264_Short) * ctx_pic->slice_count;
args->pData = ctx_pic->slice_short;
return 0;
}
static int d3d12va_h264_end_frame(AVCodecContext *avctx)
{
H264Context *h = avctx->priv_data;
H264DecodePictureContext *ctx_pic = h->cur_pic_ptr->hwaccel_picture_private;
H264SliceContext *sl = &h->slice_ctx[0];
int ret;
if (ctx_pic->slice_count <= 0 || ctx_pic->bitstream_size <= 0)
return -1;
ret = ff_d3d12va_common_end_frame(avctx, h->cur_pic_ptr->f,
&ctx_pic->pp, sizeof(ctx_pic->pp),
&ctx_pic->qm, sizeof(ctx_pic->qm),
update_input_arguments);
if (!ret)
ff_h264_draw_horiz_band(h, sl, 0, h->avctx->height);
return ret;
}
static int d3d12va_h264_decode_init(AVCodecContext *avctx)
{
D3D12VADecodeContext *ctx = D3D12VA_DECODE_CONTEXT(avctx);
DXVA_PicParams_H264 pp;
ctx->cfg.DecodeProfile = D3D12_VIDEO_DECODE_PROFILE_H264;
ctx->max_num_ref = FF_ARRAY_ELEMS(pp.RefFrameList) + 1;
return ff_d3d12va_decode_init(avctx);
}
#if CONFIG_H264_D3D12VA_HWACCEL
const FFHWAccel ff_h264_d3d12va_hwaccel = {
.p.name = "h264_d3d12va",
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_H264,
.p.pix_fmt = AV_PIX_FMT_D3D12,
.init = d3d12va_h264_decode_init,
.uninit = ff_d3d12va_decode_uninit,
.start_frame = d3d12va_h264_start_frame,
.decode_slice = d3d12va_h264_decode_slice,
.end_frame = d3d12va_h264_end_frame,
.frame_params = ff_d3d12va_common_frame_params,
.frame_priv_data_size = sizeof(H264DecodePictureContext),
.priv_data_size = sizeof(D3D12VADecodeContext),
};
#endif
|
