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
|
/*
* 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 "libavutil/common.h"
#include "libavutil/opt.h"
#include "bsf.h"
#include "cbs.h"
#include "cbs_bsf.h"
#include "cbs_av1.h"
typedef struct AV1MetadataContext {
CBSBSFContext common;
int td;
int color_primaries;
int transfer_characteristics;
int matrix_coefficients;
int color_range;
int chroma_sample_position;
AVRational tick_rate;
int num_ticks_per_picture;
int delete_padding;
} AV1MetadataContext;
static int av1_metadata_update_sequence_header(AVBSFContext *bsf,
AV1RawSequenceHeader *seq)
{
AV1MetadataContext *ctx = bsf->priv_data;
AV1RawColorConfig *clc = &seq->color_config;
AV1RawTimingInfo *tim = &seq->timing_info;
if (ctx->color_primaries >= 0 ||
ctx->transfer_characteristics >= 0 ||
ctx->matrix_coefficients >= 0) {
clc->color_description_present_flag = 1;
if (ctx->color_primaries >= 0)
clc->color_primaries = ctx->color_primaries;
if (ctx->transfer_characteristics >= 0)
clc->transfer_characteristics = ctx->transfer_characteristics;
if (ctx->matrix_coefficients >= 0)
clc->matrix_coefficients = ctx->matrix_coefficients;
}
if (ctx->color_range >= 0) {
if (clc->color_primaries == AVCOL_PRI_BT709 &&
clc->transfer_characteristics == AVCOL_TRC_IEC61966_2_1 &&
clc->matrix_coefficients == AVCOL_SPC_RGB) {
av_log(bsf, AV_LOG_WARNING, "Warning: color_range cannot be set "
"on RGB streams encoded in BT.709 sRGB.\n");
} else {
clc->color_range = ctx->color_range;
}
}
if (ctx->chroma_sample_position >= 0) {
if (clc->mono_chrome || !clc->subsampling_x || !clc->subsampling_y) {
av_log(bsf, AV_LOG_WARNING, "Warning: chroma_sample_position "
"can only be set for 4:2:0 streams.\n");
} else {
clc->chroma_sample_position = ctx->chroma_sample_position;
}
}
if (ctx->tick_rate.num && ctx->tick_rate.den) {
int num, den;
av_reduce(&num, &den, ctx->tick_rate.num, ctx->tick_rate.den,
UINT32_MAX > INT_MAX ? UINT32_MAX : INT_MAX);
tim->time_scale = num;
tim->num_units_in_display_tick = den;
seq->timing_info_present_flag = 1;
if (ctx->num_ticks_per_picture > 0) {
tim->equal_picture_interval = 1;
tim->num_ticks_per_picture_minus_1 =
ctx->num_ticks_per_picture - 1;
}
}
return 0;
}
static int av1_metadata_update_fragment(AVBSFContext *bsf, AVPacket *pkt,
CodedBitstreamFragment *frag)
{
AV1MetadataContext *ctx = bsf->priv_data;
AV1RawOBU td, *obu;
int err, i;
for (i = 0; i < frag->nb_units; i++) {
if (frag->units[i].type == AV1_OBU_SEQUENCE_HEADER) {
obu = frag->units[i].content;
err = av1_metadata_update_sequence_header(bsf, &obu->obu.sequence_header);
if (err < 0)
return err;
}
}
// If a Temporal Delimiter is present, it must be the first OBU.
if (frag->units[0].type == AV1_OBU_TEMPORAL_DELIMITER) {
if (ctx->td == BSF_ELEMENT_REMOVE)
ff_cbs_delete_unit(frag, 0);
} else if (pkt && ctx->td == BSF_ELEMENT_INSERT) {
td = (AV1RawOBU) {
.header.obu_type = AV1_OBU_TEMPORAL_DELIMITER,
};
err = ff_cbs_insert_unit_content(frag, 0, AV1_OBU_TEMPORAL_DELIMITER,
&td, NULL);
if (err < 0) {
av_log(bsf, AV_LOG_ERROR, "Failed to insert Temporal Delimiter.\n");
return err;
}
}
if (ctx->delete_padding) {
for (i = frag->nb_units - 1; i >= 0; i--) {
if (frag->units[i].type == AV1_OBU_PADDING)
ff_cbs_delete_unit(frag, i);
}
}
return 0;
}
static const CBSBSFType av1_metadata_type = {
.codec_id = AV_CODEC_ID_AV1,
.fragment_name = "temporal unit",
.unit_name = "OBU",
.update_fragment = &av1_metadata_update_fragment,
};
static int av1_metadata_init(AVBSFContext *bsf)
{
return ff_cbs_bsf_generic_init(bsf, &av1_metadata_type);
}
#define OFFSET(x) offsetof(AV1MetadataContext, x)
#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_BSF_PARAM)
static const AVOption av1_metadata_options[] = {
BSF_ELEMENT_OPTIONS_PIR("td", "Temporal Delimiter OBU",
td, FLAGS),
{ "color_primaries", "Set color primaries (section 6.4.2)",
OFFSET(color_primaries), AV_OPT_TYPE_INT,
{ .i64 = -1 }, -1, 255, FLAGS },
{ "transfer_characteristics", "Set transfer characteristics (section 6.4.2)",
OFFSET(transfer_characteristics), AV_OPT_TYPE_INT,
{ .i64 = -1 }, -1, 255, FLAGS },
{ "matrix_coefficients", "Set matrix coefficients (section 6.4.2)",
OFFSET(matrix_coefficients), AV_OPT_TYPE_INT,
{ .i64 = -1 }, -1, 255, FLAGS },
{ "color_range", "Set color range flag (section 6.4.2)",
OFFSET(color_range), AV_OPT_TYPE_INT,
{ .i64 = -1 }, -1, 1, FLAGS, "cr" },
{ "tv", "TV (limited) range", 0, AV_OPT_TYPE_CONST,
{ .i64 = 0 }, .flags = FLAGS, .unit = "cr" },
{ "pc", "PC (full) range", 0, AV_OPT_TYPE_CONST,
{ .i64 = 1 }, .flags = FLAGS, .unit = "cr" },
{ "chroma_sample_position", "Set chroma sample position (section 6.4.2)",
OFFSET(chroma_sample_position), AV_OPT_TYPE_INT,
{ .i64 = -1 }, -1, 3, FLAGS, "csp" },
{ "unknown", "Unknown chroma sample position", 0, AV_OPT_TYPE_CONST,
{ .i64 = AV1_CSP_UNKNOWN }, .flags = FLAGS, .unit = "csp" },
{ "vertical", "Left chroma sample position", 0, AV_OPT_TYPE_CONST,
{ .i64 = AV1_CSP_VERTICAL }, .flags = FLAGS, .unit = "csp" },
{ "colocated", "Top-left chroma sample position", 0, AV_OPT_TYPE_CONST,
{ .i64 = AV1_CSP_COLOCATED }, .flags = FLAGS, .unit = "csp" },
{ "tick_rate", "Set display tick rate (num_units_in_display_tick / time_scale)",
OFFSET(tick_rate), AV_OPT_TYPE_RATIONAL,
{ .dbl = 0.0 }, 0, UINT_MAX, FLAGS },
{ "num_ticks_per_picture", "Set display ticks per picture for CFR streams",
OFFSET(num_ticks_per_picture), AV_OPT_TYPE_INT,
{ .i64 = -1 }, -1, INT_MAX, FLAGS },
{ "delete_padding", "Delete all Padding OBUs",
OFFSET(delete_padding), AV_OPT_TYPE_BOOL,
{ .i64 = 0 }, 0, 1, FLAGS},
{ NULL }
};
static const AVClass av1_metadata_class = {
.class_name = "av1_metadata_bsf",
.item_name = av_default_item_name,
.option = av1_metadata_options,
.version = LIBAVUTIL_VERSION_INT,
};
static const enum AVCodecID av1_metadata_codec_ids[] = {
AV_CODEC_ID_AV1, AV_CODEC_ID_NONE,
};
const AVBitStreamFilter ff_av1_metadata_bsf = {
.name = "av1_metadata",
.priv_data_size = sizeof(AV1MetadataContext),
.priv_class = &av1_metadata_class,
.init = &av1_metadata_init,
.close = &ff_cbs_bsf_generic_close,
.filter = &ff_cbs_bsf_generic_filter,
.codec_ids = av1_metadata_codec_ids,
};
|
