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
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
/*
* AV1 parser
*
* Copyright (C) 2018 James Almer <jamrial@gmail.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 "av1_parse.h"
#include "cbs.h"
#include "cbs_av1.h"
#include "parser.h"
typedef struct AV1ParseContext {
CodedBitstreamContext *cbc;
CodedBitstreamFragment temporal_unit;
int parsed_extradata;
} AV1ParseContext;
static const enum AVPixelFormat pix_fmts_8bit[2][2] = {
{ AV_PIX_FMT_YUV444P, AV_PIX_FMT_NONE },
{ AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P },
};
static const enum AVPixelFormat pix_fmts_10bit[2][2] = {
{ AV_PIX_FMT_YUV444P10, AV_PIX_FMT_NONE },
{ AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV420P10 },
};
static const enum AVPixelFormat pix_fmts_12bit[2][2] = {
{ AV_PIX_FMT_YUV444P12, AV_PIX_FMT_NONE },
{ AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12 },
};
static int av1_parser_parse(AVCodecParserContext *ctx,
AVCodecContext *avctx,
const uint8_t **out_data, int *out_size,
const uint8_t *data, int size)
{
AV1ParseContext *s = ctx->priv_data;
CodedBitstreamFragment *td = &s->temporal_unit;
CodedBitstreamAV1Context *av1 = s->cbc->priv_data;
int ret;
*out_data = data;
*out_size = size;
ctx->key_frame = -1;
ctx->pict_type = AV_PICTURE_TYPE_NONE;
ctx->picture_structure = AV_PICTURE_STRUCTURE_UNKNOWN;
s->cbc->log_ctx = avctx;
if (avctx->extradata_size && !s->parsed_extradata) {
s->parsed_extradata = 1;
ret = ff_cbs_read(s->cbc, td, avctx->extradata, avctx->extradata_size);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "Failed to parse extradata.\n");
goto end;
}
ff_cbs_fragment_reset(s->cbc, td);
}
ret = ff_cbs_read(s->cbc, td, data, size);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "Failed to parse temporal unit.\n");
goto end;
}
if (!av1->sequence_header) {
av_log(avctx, AV_LOG_ERROR, "No sequence header available\n");
goto end;
}
for (int i = 0; i < td->nb_units; i++) {
CodedBitstreamUnit *unit = &td->units[i];
AV1RawOBU *obu = unit->content;
AV1RawSequenceHeader *seq = av1->sequence_header;
AV1RawColorConfig *color = &seq->color_config;
AV1RawFrameHeader *frame;
int frame_type;
if (unit->type == AV1_OBU_FRAME)
frame = &obu->obu.frame.header;
else if (unit->type == AV1_OBU_FRAME_HEADER)
frame = &obu->obu.frame_header;
else
continue;
if (frame->show_existing_frame) {
AV1ReferenceFrameState *ref = &av1->ref[frame->frame_to_show_map_idx];
if (!ref->valid) {
av_log(avctx, AV_LOG_ERROR, "Invalid reference frame\n");
goto end;
}
ctx->width = ref->frame_width;
ctx->height = ref->frame_height;
frame_type = ref->frame_type;
ctx->key_frame = 0;
} else if (!frame->show_frame) {
continue;
} else {
ctx->width = av1->frame_width;
ctx->height = av1->frame_height;
frame_type = frame->frame_type;
ctx->key_frame = frame_type == AV1_FRAME_KEY;
}
avctx->profile = seq->seq_profile;
avctx->level = seq->seq_level_idx[0];
switch (frame_type) {
case AV1_FRAME_KEY:
case AV1_FRAME_INTRA_ONLY:
ctx->pict_type = AV_PICTURE_TYPE_I;
break;
case AV1_FRAME_INTER:
ctx->pict_type = AV_PICTURE_TYPE_P;
break;
case AV1_FRAME_SWITCH:
ctx->pict_type = AV_PICTURE_TYPE_SP;
break;
}
ctx->picture_structure = AV_PICTURE_STRUCTURE_FRAME;
switch (av1->bit_depth) {
case 8:
ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY8
: pix_fmts_8bit [color->subsampling_x][color->subsampling_y];
break;
case 10:
ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY10
: pix_fmts_10bit[color->subsampling_x][color->subsampling_y];
break;
case 12:
ctx->format = color->mono_chrome ? AV_PIX_FMT_GRAY12
: pix_fmts_12bit[color->subsampling_x][color->subsampling_y];
break;
}
av_assert2(ctx->format != AV_PIX_FMT_NONE);
}
end:
ff_cbs_fragment_reset(s->cbc, td);
s->cbc->log_ctx = NULL;
return size;
}
static const CodedBitstreamUnitType decompose_unit_types[] = {
AV1_OBU_TEMPORAL_DELIMITER,
AV1_OBU_SEQUENCE_HEADER,
AV1_OBU_FRAME_HEADER,
AV1_OBU_TILE_GROUP,
AV1_OBU_FRAME,
};
static av_cold int av1_parser_init(AVCodecParserContext *ctx)
{
AV1ParseContext *s = ctx->priv_data;
int ret;
ret = ff_cbs_init(&s->cbc, AV_CODEC_ID_AV1, NULL);
if (ret < 0)
return ret;
s->cbc->decompose_unit_types = (CodedBitstreamUnitType *)decompose_unit_types;
s->cbc->nb_decompose_unit_types = FF_ARRAY_ELEMS(decompose_unit_types);
return 0;
}
static void av1_parser_close(AVCodecParserContext *ctx)
{
AV1ParseContext *s = ctx->priv_data;
ff_cbs_fragment_free(s->cbc, &s->temporal_unit);
ff_cbs_close(&s->cbc);
}
static int av1_parser_split(AVCodecContext *avctx,
const uint8_t *buf, int buf_size)
{
AV1OBU obu;
const uint8_t *ptr = buf, *end = buf + buf_size;
while (ptr < end) {
int len = ff_av1_extract_obu(&obu, ptr, buf_size, avctx);
if (len < 0)
break;
if (obu.type == AV1_OBU_FRAME_HEADER ||
obu.type == AV1_OBU_FRAME) {
return ptr - buf;
}
ptr += len;
buf_size -= len;
}
return 0;
}
AVCodecParser ff_av1_parser = {
.codec_ids = { AV_CODEC_ID_AV1 },
.priv_data_size = sizeof(AV1ParseContext),
.parser_init = av1_parser_init,
.parser_close = av1_parser_close,
.parser_parse = av1_parser_parse,
.split = av1_parser_split,
};
|
