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
|
/*
* Copyright (c) 2022 Niklas Haas
* 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
*/
/**
* @file
* filter for generating ICC profiles
*/
#include <lcms2.h>
#include "libavutil/csp.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "fflcms2.h"
#include "internal.h"
#include "video.h"
typedef struct IccDetectContext {
const AVClass *class;
FFIccContext icc;
int force;
/* (cached) detected ICC profile values */
AVBufferRef *profile;
enum AVColorPrimaries profile_prim;
enum AVColorTransferCharacteristic profile_trc;
} IccDetectContext;
#define OFFSET(x) offsetof(IccDetectContext, x)
#define VF AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
static const AVOption iccdetect_options[] = {
{ "force", "overwrite existing tags", OFFSET(force), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, VF },
{ NULL }
};
AVFILTER_DEFINE_CLASS(iccdetect);
static av_cold void iccdetect_uninit(AVFilterContext *avctx)
{
IccDetectContext *s = avctx->priv;
av_buffer_unref(&s->profile);
ff_icc_context_uninit(&s->icc);
}
static av_cold int iccdetect_init(AVFilterContext *avctx)
{
IccDetectContext *s = avctx->priv;
return ff_icc_context_init(&s->icc, avctx);
}
static int iccdetect_filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
AVFilterContext *avctx = inlink->dst;
IccDetectContext *s = avctx->priv;
const AVFrameSideData *sd;
AVColorPrimariesDesc coeffs;
cmsHPROFILE profile;
int ret;
sd = av_frame_get_side_data(frame, AV_FRAME_DATA_ICC_PROFILE);
if (!sd)
return ff_filter_frame(inlink->dst->outputs[0], frame);
if (s->profile && s->profile->data == sd->buf->data) {
/* No change from previous ICC profile */
goto done;
}
if ((ret = av_buffer_replace(&s->profile, sd->buf)) < 0)
return ret;
s->profile_prim = AVCOL_PRI_UNSPECIFIED;
s->profile_trc = AVCOL_TRC_UNSPECIFIED;
profile = cmsOpenProfileFromMemTHR(s->icc.ctx, sd->data, sd->size);
if (!profile)
return AVERROR_INVALIDDATA;
ret = ff_icc_profile_sanitize(&s->icc, profile);
if (!ret)
ret = ff_icc_profile_read_primaries(&s->icc, profile, &coeffs);
if (!ret)
ret = ff_icc_profile_detect_transfer(&s->icc, profile, &s->profile_trc);
cmsCloseProfile(profile);
if (ret < 0)
return ret;
s->profile_prim = av_csp_primaries_id_from_desc(&coeffs);
done:
if (s->profile_prim != AVCOL_PRI_UNSPECIFIED) {
if (s->force || frame->color_primaries == AVCOL_PRI_UNSPECIFIED)
frame->color_primaries = s->profile_prim;
}
if (s->profile_trc != AVCOL_TRC_UNSPECIFIED) {
if (s->force || frame->color_trc == AVCOL_TRC_UNSPECIFIED)
frame->color_trc = s->profile_trc;
}
return ff_filter_frame(inlink->dst->outputs[0], frame);
}
static const AVFilterPad iccdetect_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = iccdetect_filter_frame,
},
};
const AVFilter ff_vf_iccdetect = {
.name = "iccdetect",
.description = NULL_IF_CONFIG_SMALL("Detect and parse ICC profiles."),
.priv_size = sizeof(IccDetectContext),
.priv_class = &iccdetect_class,
.flags = AVFILTER_FLAG_METADATA_ONLY,
.init = &iccdetect_init,
.uninit = &iccdetect_uninit,
FILTER_INPUTS(iccdetect_inputs),
FILTER_OUTPUTS(ff_video_default_filterpad),
};
|
