File size: 4,149 Bytes
8ead80b |
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 |
/*
* 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_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),
};
|