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139 lines
4.1 KiB
139 lines
4.1 KiB
/* |
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* Copyright (c) 2022 Niklas Haas |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file |
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* filter for generating ICC profiles |
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*/ |
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#include <lcms2.h> |
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#include "libavutil/csp.h" |
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#include "libavutil/opt.h" |
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#include "libavutil/pixdesc.h" |
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#include "avfilter.h" |
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#include "fflcms2.h" |
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#include "filters.h" |
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#include "video.h" |
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typedef struct IccDetectContext { |
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const AVClass *class; |
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FFIccContext icc; |
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int force; |
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/* (cached) detected ICC profile values */ |
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AVBufferRef *profile; |
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enum AVColorPrimaries profile_prim; |
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enum AVColorTransferCharacteristic profile_trc; |
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} IccDetectContext; |
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#define OFFSET(x) offsetof(IccDetectContext, x) |
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#define VF AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM |
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static const AVOption iccdetect_options[] = { |
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{ "force", "overwrite existing tags", OFFSET(force), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, VF }, |
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{ NULL } |
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}; |
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AVFILTER_DEFINE_CLASS(iccdetect); |
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static av_cold void iccdetect_uninit(AVFilterContext *avctx) |
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{ |
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IccDetectContext *s = avctx->priv; |
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av_buffer_unref(&s->profile); |
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ff_icc_context_uninit(&s->icc); |
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} |
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static av_cold int iccdetect_init(AVFilterContext *avctx) |
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{ |
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IccDetectContext *s = avctx->priv; |
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return ff_icc_context_init(&s->icc, avctx); |
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} |
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static int iccdetect_filter_frame(AVFilterLink *inlink, AVFrame *frame) |
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{ |
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AVFilterContext *avctx = inlink->dst; |
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IccDetectContext *s = avctx->priv; |
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const AVFrameSideData *sd; |
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AVColorPrimariesDesc coeffs; |
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cmsHPROFILE profile; |
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int ret; |
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sd = av_frame_get_side_data(frame, AV_FRAME_DATA_ICC_PROFILE); |
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if (!sd) |
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return ff_filter_frame(inlink->dst->outputs[0], frame); |
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if (s->profile && s->profile->data == sd->buf->data) { |
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/* No change from previous ICC profile */ |
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goto done; |
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} |
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if ((ret = av_buffer_replace(&s->profile, sd->buf)) < 0) |
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return ret; |
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s->profile_prim = AVCOL_PRI_UNSPECIFIED; |
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s->profile_trc = AVCOL_TRC_UNSPECIFIED; |
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profile = cmsOpenProfileFromMemTHR(s->icc.ctx, sd->data, sd->size); |
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if (!profile) |
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return AVERROR_INVALIDDATA; |
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ret = ff_icc_profile_sanitize(&s->icc, profile); |
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if (!ret) |
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ret = ff_icc_profile_read_primaries(&s->icc, profile, &coeffs); |
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if (!ret) |
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ret = ff_icc_profile_detect_transfer(&s->icc, profile, &s->profile_trc); |
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cmsCloseProfile(profile); |
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if (ret < 0) |
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return ret; |
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s->profile_prim = av_csp_primaries_id_from_desc(&coeffs); |
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done: |
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if (s->profile_prim != AVCOL_PRI_UNSPECIFIED) { |
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if (s->force || frame->color_primaries == AVCOL_PRI_UNSPECIFIED) |
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frame->color_primaries = s->profile_prim; |
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} |
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if (s->profile_trc != AVCOL_TRC_UNSPECIFIED) { |
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if (s->force || frame->color_trc == AVCOL_TRC_UNSPECIFIED) |
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frame->color_trc = s->profile_trc; |
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} |
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return ff_filter_frame(inlink->dst->outputs[0], frame); |
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} |
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static const AVFilterPad iccdetect_inputs[] = { |
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{ |
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.name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.filter_frame = iccdetect_filter_frame, |
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}, |
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}; |
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const AVFilter ff_vf_iccdetect = { |
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.name = "iccdetect", |
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.description = NULL_IF_CONFIG_SMALL("Detect and parse ICC profiles."), |
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.priv_size = sizeof(IccDetectContext), |
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.priv_class = &iccdetect_class, |
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.flags = AVFILTER_FLAG_METADATA_ONLY, |
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.init = &iccdetect_init, |
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.uninit = &iccdetect_uninit, |
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FILTER_INPUTS(iccdetect_inputs), |
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FILTER_OUTPUTS(ff_video_default_filterpad), |
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};
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