diff options
| -rw-r--r-- | libavcodec/Makefile | 1 | ||||
| -rw-r--r-- | libavcodec/fflcms2.c | 311 | ||||
| -rw-r--r-- | libavcodec/fflcms2.h | 87 | ||||
| -rw-r--r-- | libavfilter/fflcms2.c | 294 | ||||
| -rw-r--r-- | libavfilter/fflcms2.h | 65 |
5 files changed, 401 insertions, 357 deletions
diff --git a/libavcodec/Makefile b/libavcodec/Makefile index a4fab108d6..6751b6b591 100644 --- a/libavcodec/Makefile +++ b/libavcodec/Makefile @@ -1240,6 +1240,7 @@ SKIPHEADERS-$(CONFIG_AMF) += amfenc.h SKIPHEADERS-$(CONFIG_D3D11VA) += d3d11va.h dxva2_internal.h SKIPHEADERS-$(CONFIG_DXVA2) += dxva2.h dxva2_internal.h SKIPHEADERS-$(CONFIG_JNI) += ffjni.h +SKIPHEADERS-$(CONFIG_LCMS2) += fflcms2.h SKIPHEADERS-$(CONFIG_LIBJXL) += libjxl.h SKIPHEADERS-$(CONFIG_LIBVPX) += libvpx.h SKIPHEADERS-$(CONFIG_LIBWEBP_ENCODER) += libwebpenc_common.h diff --git a/libavcodec/fflcms2.c b/libavcodec/fflcms2.c new file mode 100644 index 0000000000..fd370fb310 --- /dev/null +++ b/libavcodec/fflcms2.c @@ -0,0 +1,311 @@ +/* + * 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 + */ + +#include "libavutil/color_utils.h" +#include "libavutil/csp.h" + +#include "fflcms2.h" + +static void log_cb(cmsContext ctx, cmsUInt32Number error, const char *str) +{ + FFIccContext *s = cmsGetContextUserData(ctx); + av_log(s->avctx, AV_LOG_ERROR, "lcms2: [%"PRIu32"] %s\n", error, str); +} + +int ff_icc_context_init(FFIccContext *s, void *avctx) +{ + memset(s, 0, sizeof(*s)); + s->avctx = avctx; + s->ctx = cmsCreateContext(NULL, s); + if (!s->ctx) + return AVERROR(ENOMEM); + + cmsSetLogErrorHandlerTHR(s->ctx, log_cb); + return 0; +} + +void ff_icc_context_uninit(FFIccContext *s) +{ + for (int i = 0; i < FF_ARRAY_ELEMS(s->curves); i++) + cmsFreeToneCurve(s->curves[i]); + cmsDeleteContext(s->ctx); + memset(s, 0, sizeof(*s)); +} + +static int get_curve(FFIccContext *s, enum AVColorTransferCharacteristic trc, + cmsToneCurve **out_curve) +{ + if (trc >= AVCOL_TRC_NB) + return AVERROR_INVALIDDATA; + + if (s->curves[trc]) + goto done; + + switch (trc) { + case AVCOL_TRC_LINEAR: + s->curves[trc] = cmsBuildGamma(s->ctx, 1.0); + break; + case AVCOL_TRC_GAMMA22: + s->curves[trc] = cmsBuildGamma(s->ctx, 2.2); + break; + case AVCOL_TRC_GAMMA28: + s->curves[trc] = cmsBuildGamma(s->ctx, 2.8); + break; + case AVCOL_TRC_BT709: + case AVCOL_TRC_SMPTE170M: + case AVCOL_TRC_BT2020_10: + case AVCOL_TRC_BT2020_12: + s->curves[trc] = cmsBuildParametricToneCurve(s->ctx, 4, (double[5]) { + /* γ = */ 1/0.45, + /* a = */ 1/1.099296826809442, + /* b = */ 1 - 1/1.099296826809442, + /* c = */ 1/4.5, + /* d = */ 4.5 * 0.018053968510807, + }); + break; + case AVCOL_TRC_SMPTE240M: + s->curves[trc] = cmsBuildParametricToneCurve(s->ctx, 4, (double[5]) { + /* γ = */ 1/0.45, + /* a = */ 1/1.1115, + /* b = */ 1 - 1/1.1115, + /* c = */ 1/4.0, + /* d = */ 4.0 * 0.0228, + }); + break; + case AVCOL_TRC_LOG: + s->curves[trc] = cmsBuildParametricToneCurve(s->ctx, 8, (double[5]) { + /* a = */ 1.0, + /* b = */ 10.0, + /* c = */ 2.0, + /* d = */ -1.0, + /* e = */ 0.0 + }); + break; + case AVCOL_TRC_LOG_SQRT: + s->curves[trc] = cmsBuildParametricToneCurve(s->ctx, 8, (double[5]) { + /* a = */ 1.0, + /* b = */ 10.0, + /* c = */ 2.5, + /* d = */ -1.0, + /* e = */ 0.0 + }); + break; + case AVCOL_TRC_IEC61966_2_1: + s->curves[trc] = cmsBuildParametricToneCurve(s->ctx, 4, (double[5]) { + /* γ = */ 2.4, + /* a = */ 1/1.055, + /* b = */ 1 - 1/1.055, + /* c = */ 1/12.92, + /* d = */ 12.92 * 0.0031308, + }); + break; + case AVCOL_TRC_SMPTE428: + s->curves[trc] = cmsBuildParametricToneCurve(s->ctx, 2, (double[3]) { + /* γ = */ 2.6, + /* a = */ pow(52.37/48.0, 1/2.6), + /* b = */ 0.0 + }); + break; + + /* Can't be represented using the existing parametric tone curves. + * FIXME: use cmsBuildTabulatedToneCurveFloat instead */ + case AVCOL_TRC_IEC61966_2_4: + case AVCOL_TRC_BT1361_ECG: + case AVCOL_TRC_SMPTE2084: + case AVCOL_TRC_ARIB_STD_B67: + return AVERROR_PATCHWELCOME; + + default: + return AVERROR_INVALIDDATA; + } + + if (!s->curves[trc]) + return AVERROR(ENOMEM); + +done: + *out_curve = s->curves[trc]; + return 0; +} + +int ff_icc_profile_generate(FFIccContext *s, + enum AVColorPrimaries color_prim, + enum AVColorTransferCharacteristic color_trc, + cmsHPROFILE *out_profile) +{ + cmsToneCurve *tonecurve; + const AVColorPrimariesDesc *prim; + int ret; + + if (!(prim = av_csp_primaries_desc_from_id(color_prim))) + return AVERROR_INVALIDDATA; + if ((ret = get_curve(s, color_trc, &tonecurve)) < 0) + return ret; + + *out_profile = cmsCreateRGBProfileTHR(s->ctx, + &(cmsCIExyY) { av_q2d(prim->wp.x), av_q2d(prim->wp.y), 1.0 }, + &(cmsCIExyYTRIPLE) { + .Red = { av_q2d(prim->prim.r.x), av_q2d(prim->prim.r.y), 1.0 }, + .Green = { av_q2d(prim->prim.g.x), av_q2d(prim->prim.g.y), 1.0 }, + .Blue = { av_q2d(prim->prim.b.x), av_q2d(prim->prim.b.y), 1.0 }, + }, + (cmsToneCurve *[3]) { tonecurve, tonecurve, tonecurve } + ); + + return *out_profile == NULL ? AVERROR(ENOMEM) : 0; +} + +int ff_icc_profile_attach(FFIccContext *s, cmsHPROFILE profile, AVFrame *frame) +{ + cmsUInt32Number size; + AVBufferRef *buf; + + if (!cmsSaveProfileToMem(profile, NULL, &size)) + return AVERROR_EXTERNAL; + + buf = av_buffer_alloc(size); + if (!buf) + return AVERROR(ENOMEM); + + if (!cmsSaveProfileToMem(profile, buf->data, &size) || size != buf->size) { + av_buffer_unref(&buf); + return AVERROR_EXTERNAL; + } + + if (!av_frame_new_side_data_from_buf(frame, AV_FRAME_DATA_ICC_PROFILE, buf)) { + av_buffer_unref(&buf); + return AVERROR(ENOMEM); + } + + return 0; +} + +static av_always_inline void XYZ_xy(cmsCIEXYZ XYZ, AVCIExy *xy) +{ + double k = 1.0 / (XYZ.X + XYZ.Y + XYZ.Z); + xy->x = av_d2q(k * XYZ.X, 100000); + xy->y = av_d2q(k * XYZ.Y, 100000); +} + +int ff_icc_profile_read_primaries(FFIccContext *s, cmsHPROFILE profile, + AVColorPrimariesDesc *out_primaries) +{ + static const uint8_t testprimaries[4][3] = { + { 0xFF, 0, 0 }, /* red */ + { 0, 0xFF, 0 }, /* green */ + { 0, 0, 0xFF }, /* blue */ + { 0xFF, 0xFF, 0xFF }, /* white */ + }; + + AVWhitepointCoefficients *wp = &out_primaries->wp; + AVPrimaryCoefficients *prim = &out_primaries->prim; + cmsFloat64Number prev_adapt; + cmsHPROFILE xyz; + cmsHTRANSFORM tf; + cmsCIEXYZ dst[4]; + + xyz = cmsCreateXYZProfileTHR(s->ctx); + if (!xyz) + return AVERROR(ENOMEM); + + /* We need to use an unadapted observer to get the raw values */ + prev_adapt = cmsSetAdaptationStateTHR(s->ctx, 0.0); + tf = cmsCreateTransformTHR(s->ctx, profile, TYPE_RGB_8, xyz, TYPE_XYZ_DBL, + INTENT_ABSOLUTE_COLORIMETRIC, + /* Note: These flags mostly don't do anything + * anyway, but specify them regardless */ + cmsFLAGS_NOCACHE | + cmsFLAGS_NOOPTIMIZE | + cmsFLAGS_LOWRESPRECALC | + cmsFLAGS_GRIDPOINTS(2)); + cmsSetAdaptationStateTHR(s->ctx, prev_adapt); + cmsCloseProfile(xyz); + if (!tf) { + av_log(s->avctx, AV_LOG_ERROR, "Invalid ICC profile (e.g. CMYK)\n"); + return AVERROR_INVALIDDATA; + } + + cmsDoTransform(tf, testprimaries, dst, 4); + cmsDeleteTransform(tf); + XYZ_xy(dst[0], &prim->r); + XYZ_xy(dst[1], &prim->g); + XYZ_xy(dst[2], &prim->b); + XYZ_xy(dst[3], wp); + return 0; +} + +int ff_icc_profile_detect_transfer(FFIccContext *s, cmsHPROFILE profile, + enum AVColorTransferCharacteristic *out_trc) +{ + /* 8-bit linear grayscale ramp */ + static const uint8_t testramp[16][3] = { + { 1, 1, 1}, /* avoid exact zero due to log100 etc. */ + { 17, 17, 17}, + { 34, 34, 34}, + { 51, 51, 51}, + { 68, 68, 68}, + { 85, 85, 85}, + { 02, 02, 02}, + {119, 119, 119}, + {136, 136, 136}, + {153, 153, 153}, + {170, 170, 170}, + {187, 187, 187}, + {204, 204, 204}, + {221, 221, 221}, + {238, 238, 238}, + {255, 255, 255}, + }; + + double dst[FF_ARRAY_ELEMS(testramp)]; + + for (enum AVColorTransferCharacteristic trc = 0; trc < AVCOL_TRC_NB; trc++) { + cmsToneCurve *tonecurve; + cmsHPROFILE ref; + cmsHTRANSFORM tf; + double delta = 0.0; + if (get_curve(s, trc, &tonecurve) < 0) + continue; + + ref = cmsCreateGrayProfileTHR(s->ctx, cmsD50_xyY(), tonecurve); + if (!ref) + return AVERROR(ENOMEM); + + tf = cmsCreateTransformTHR(s->ctx, profile, TYPE_RGB_8, ref, TYPE_GRAY_DBL, + INTENT_RELATIVE_COLORIMETRIC, + cmsFLAGS_NOCACHE | cmsFLAGS_NOOPTIMIZE); + cmsCloseProfile(ref); + if (!tf) { + av_log(s->avctx, AV_LOG_ERROR, "Invalid ICC profile (e.g. CMYK)\n"); + return AVERROR_INVALIDDATA; + } + + cmsDoTransform(tf, testramp, dst, FF_ARRAY_ELEMS(dst)); + cmsDeleteTransform(tf); + + for (int i = 0; i < FF_ARRAY_ELEMS(dst); i++) + delta += fabs(testramp[i][0] / 255.0 - dst[i]); + if (delta < 0.01) { + *out_trc = trc; + return 0; + } + } + + *out_trc = AVCOL_TRC_UNSPECIFIED; + return 0; +} diff --git a/libavcodec/fflcms2.h b/libavcodec/fflcms2.h new file mode 100644 index 0000000000..af63c9a13c --- /dev/null +++ b/libavcodec/fflcms2.h @@ -0,0 +1,87 @@ +/* + * 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 + * Various functions for dealing with ICC profiles + */ + +#ifndef AVCODEC_FFLCMS2_H +#define AVCODEC_FFLCMS2_H + +#include "libavutil/csp.h" +#include "libavutil/frame.h" +#include "libavutil/pixfmt.h" + +#include <lcms2.h> + +typedef struct FFIccContext { + void *avctx; + cmsContext ctx; + cmsToneCurve *curves[AVCOL_TRC_NB]; /* tone curve cache */ +} FFIccContext; + +/** + * Initializes an FFIccContext. This must be done prior to using it. + * + * Returns 0 on success, or a negative error code. + */ +int ff_icc_context_init(FFIccContext *s, void *avctx); +void ff_icc_context_uninit(FFIccContext *s); + +/** + * Generate an ICC profile for a given combination of color primaries and + * transfer function. Both values must be set to valid entries (not + * "undefined") for this function to work. + * + * Returns 0 on success, or a negative error code. + */ +int ff_icc_profile_generate(FFIccContext *s, + enum AVColorPrimaries color_prim, + enum AVColorTransferCharacteristic color_trc, + cmsHPROFILE *out_profile); + +/** + * Attach an ICC profile to a frame. Helper wrapper around cmsSaveProfileToMem + * and av_frame_new_side_data_from_buf. + * + * Returns 0 on success, or a negative error code. + */ +int ff_icc_profile_attach(FFIccContext *s, cmsHPROFILE profile, AVFrame *frame); + +/** + * Read the color primaries and white point coefficients encoded by an ICC + * profile, and return the raw values in `out_primaries`. + * + * Returns 0 on success, or a negative error code. + */ +int ff_icc_profile_read_primaries(FFIccContext *s, cmsHPROFILE profile, + AVColorPrimariesDesc *out_primaries); + +/** + * Attempt detecting the transfer characteristic that best approximates the + * transfer function encoded by an ICC profile. Sets `out_trc` to + * AVCOL_TRC_UNSPECIFIED if no clear match can be identified. + * + * Returns 0 on success (including no match), or a negative error code. + */ +int ff_icc_profile_detect_transfer(FFIccContext *s, cmsHPROFILE profile, + enum AVColorTransferCharacteristic *out_trc); + +#endif /* AVCODEC_FFLCMS2_H */ diff --git a/libavfilter/fflcms2.c b/libavfilter/fflcms2.c index fd370fb310..822462de87 100644 --- a/libavfilter/fflcms2.c +++ b/libavfilter/fflcms2.c @@ -1,5 +1,4 @@ /* - * Copyright (c) 2022 Niklas Haas * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or @@ -17,295 +16,4 @@ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ -#include "libavutil/color_utils.h" -#include "libavutil/csp.h" - -#include "fflcms2.h" - -static void log_cb(cmsContext ctx, cmsUInt32Number error, const char *str) -{ - FFIccContext *s = cmsGetContextUserData(ctx); - av_log(s->avctx, AV_LOG_ERROR, "lcms2: [%"PRIu32"] %s\n", error, str); -} - -int ff_icc_context_init(FFIccContext *s, void *avctx) -{ - memset(s, 0, sizeof(*s)); - s->avctx = avctx; - s->ctx = cmsCreateContext(NULL, s); - if (!s->ctx) - return AVERROR(ENOMEM); - - cmsSetLogErrorHandlerTHR(s->ctx, log_cb); - return 0; -} - -void ff_icc_context_uninit(FFIccContext *s) -{ - for (int i = 0; i < FF_ARRAY_ELEMS(s->curves); i++) - cmsFreeToneCurve(s->curves[i]); - cmsDeleteContext(s->ctx); - memset(s, 0, sizeof(*s)); -} - -static int get_curve(FFIccContext *s, enum AVColorTransferCharacteristic trc, - cmsToneCurve **out_curve) -{ - if (trc >= AVCOL_TRC_NB) - return AVERROR_INVALIDDATA; - - if (s->curves[trc]) - goto done; - - switch (trc) { - case AVCOL_TRC_LINEAR: - s->curves[trc] = cmsBuildGamma(s->ctx, 1.0); - break; - case AVCOL_TRC_GAMMA22: - s->curves[trc] = cmsBuildGamma(s->ctx, 2.2); - break; - case AVCOL_TRC_GAMMA28: - s->curves[trc] = cmsBuildGamma(s->ctx, 2.8); - break; - case AVCOL_TRC_BT709: - case AVCOL_TRC_SMPTE170M: - case AVCOL_TRC_BT2020_10: - case AVCOL_TRC_BT2020_12: - s->curves[trc] = cmsBuildParametricToneCurve(s->ctx, 4, (double[5]) { - /* γ = */ 1/0.45, - /* a = */ 1/1.099296826809442, - /* b = */ 1 - 1/1.099296826809442, - /* c = */ 1/4.5, - /* d = */ 4.5 * 0.018053968510807, - }); - break; - case AVCOL_TRC_SMPTE240M: - s->curves[trc] = cmsBuildParametricToneCurve(s->ctx, 4, (double[5]) { - /* γ = */ 1/0.45, - /* a = */ 1/1.1115, - /* b = */ 1 - 1/1.1115, - /* c = */ 1/4.0, - /* d = */ 4.0 * 0.0228, - }); - break; - case AVCOL_TRC_LOG: - s->curves[trc] = cmsBuildParametricToneCurve(s->ctx, 8, (double[5]) { - /* a = */ 1.0, - /* b = */ 10.0, - /* c = */ 2.0, - /* d = */ -1.0, - /* e = */ 0.0 - }); - break; - case AVCOL_TRC_LOG_SQRT: - s->curves[trc] = cmsBuildParametricToneCurve(s->ctx, 8, (double[5]) { - /* a = */ 1.0, - /* b = */ 10.0, - /* c = */ 2.5, - /* d = */ -1.0, - /* e = */ 0.0 - }); - break; - case AVCOL_TRC_IEC61966_2_1: - s->curves[trc] = cmsBuildParametricToneCurve(s->ctx, 4, (double[5]) { - /* γ = */ 2.4, - /* a = */ 1/1.055, - /* b = */ 1 - 1/1.055, - /* c = */ 1/12.92, - /* d = */ 12.92 * 0.0031308, - }); - break; - case AVCOL_TRC_SMPTE428: - s->curves[trc] = cmsBuildParametricToneCurve(s->ctx, 2, (double[3]) { - /* γ = */ 2.6, - /* a = */ pow(52.37/48.0, 1/2.6), - /* b = */ 0.0 - }); - break; - - /* Can't be represented using the existing parametric tone curves. - * FIXME: use cmsBuildTabulatedToneCurveFloat instead */ - case AVCOL_TRC_IEC61966_2_4: - case AVCOL_TRC_BT1361_ECG: - case AVCOL_TRC_SMPTE2084: - case AVCOL_TRC_ARIB_STD_B67: - return AVERROR_PATCHWELCOME; - - default: - return AVERROR_INVALIDDATA; - } - - if (!s->curves[trc]) - return AVERROR(ENOMEM); - -done: - *out_curve = s->curves[trc]; - return 0; -} - -int ff_icc_profile_generate(FFIccContext *s, - enum AVColorPrimaries color_prim, - enum AVColorTransferCharacteristic color_trc, - cmsHPROFILE *out_profile) -{ - cmsToneCurve *tonecurve; - const AVColorPrimariesDesc *prim; - int ret; - - if (!(prim = av_csp_primaries_desc_from_id(color_prim))) - return AVERROR_INVALIDDATA; - if ((ret = get_curve(s, color_trc, &tonecurve)) < 0) - return ret; - - *out_profile = cmsCreateRGBProfileTHR(s->ctx, - &(cmsCIExyY) { av_q2d(prim->wp.x), av_q2d(prim->wp.y), 1.0 }, - &(cmsCIExyYTRIPLE) { - .Red = { av_q2d(prim->prim.r.x), av_q2d(prim->prim.r.y), 1.0 }, - .Green = { av_q2d(prim->prim.g.x), av_q2d(prim->prim.g.y), 1.0 }, - .Blue = { av_q2d(prim->prim.b.x), av_q2d(prim->prim.b.y), 1.0 }, - }, - (cmsToneCurve *[3]) { tonecurve, tonecurve, tonecurve } - ); - - return *out_profile == NULL ? AVERROR(ENOMEM) : 0; -} - -int ff_icc_profile_attach(FFIccContext *s, cmsHPROFILE profile, AVFrame *frame) -{ - cmsUInt32Number size; - AVBufferRef *buf; - - if (!cmsSaveProfileToMem(profile, NULL, &size)) - return AVERROR_EXTERNAL; - - buf = av_buffer_alloc(size); - if (!buf) - return AVERROR(ENOMEM); - - if (!cmsSaveProfileToMem(profile, buf->data, &size) || size != buf->size) { - av_buffer_unref(&buf); - return AVERROR_EXTERNAL; - } - - if (!av_frame_new_side_data_from_buf(frame, AV_FRAME_DATA_ICC_PROFILE, buf)) { - av_buffer_unref(&buf); - return AVERROR(ENOMEM); - } - - return 0; -} - -static av_always_inline void XYZ_xy(cmsCIEXYZ XYZ, AVCIExy *xy) -{ - double k = 1.0 / (XYZ.X + XYZ.Y + XYZ.Z); - xy->x = av_d2q(k * XYZ.X, 100000); - xy->y = av_d2q(k * XYZ.Y, 100000); -} - -int ff_icc_profile_read_primaries(FFIccContext *s, cmsHPROFILE profile, - AVColorPrimariesDesc *out_primaries) -{ - static const uint8_t testprimaries[4][3] = { - { 0xFF, 0, 0 }, /* red */ - { 0, 0xFF, 0 }, /* green */ - { 0, 0, 0xFF }, /* blue */ - { 0xFF, 0xFF, 0xFF }, /* white */ - }; - - AVWhitepointCoefficients *wp = &out_primaries->wp; - AVPrimaryCoefficients *prim = &out_primaries->prim; - cmsFloat64Number prev_adapt; - cmsHPROFILE xyz; - cmsHTRANSFORM tf; - cmsCIEXYZ dst[4]; - - xyz = cmsCreateXYZProfileTHR(s->ctx); - if (!xyz) - return AVERROR(ENOMEM); - - /* We need to use an unadapted observer to get the raw values */ - prev_adapt = cmsSetAdaptationStateTHR(s->ctx, 0.0); - tf = cmsCreateTransformTHR(s->ctx, profile, TYPE_RGB_8, xyz, TYPE_XYZ_DBL, - INTENT_ABSOLUTE_COLORIMETRIC, - /* Note: These flags mostly don't do anything - * anyway, but specify them regardless */ - cmsFLAGS_NOCACHE | - cmsFLAGS_NOOPTIMIZE | - cmsFLAGS_LOWRESPRECALC | - cmsFLAGS_GRIDPOINTS(2)); - cmsSetAdaptationStateTHR(s->ctx, prev_adapt); - cmsCloseProfile(xyz); - if (!tf) { - av_log(s->avctx, AV_LOG_ERROR, "Invalid ICC profile (e.g. CMYK)\n"); - return AVERROR_INVALIDDATA; - } - - cmsDoTransform(tf, testprimaries, dst, 4); - cmsDeleteTransform(tf); - XYZ_xy(dst[0], &prim->r); - XYZ_xy(dst[1], &prim->g); - XYZ_xy(dst[2], &prim->b); - XYZ_xy(dst[3], wp); - return 0; -} - -int ff_icc_profile_detect_transfer(FFIccContext *s, cmsHPROFILE profile, - enum AVColorTransferCharacteristic *out_trc) -{ - /* 8-bit linear grayscale ramp */ - static const uint8_t testramp[16][3] = { - { 1, 1, 1}, /* avoid exact zero due to log100 etc. */ - { 17, 17, 17}, - { 34, 34, 34}, - { 51, 51, 51}, - { 68, 68, 68}, - { 85, 85, 85}, - { 02, 02, 02}, - {119, 119, 119}, - {136, 136, 136}, - {153, 153, 153}, - {170, 170, 170}, - {187, 187, 187}, - {204, 204, 204}, - {221, 221, 221}, - {238, 238, 238}, - {255, 255, 255}, - }; - - double dst[FF_ARRAY_ELEMS(testramp)]; - - for (enum AVColorTransferCharacteristic trc = 0; trc < AVCOL_TRC_NB; trc++) { - cmsToneCurve *tonecurve; - cmsHPROFILE ref; - cmsHTRANSFORM tf; - double delta = 0.0; - if (get_curve(s, trc, &tonecurve) < 0) - continue; - - ref = cmsCreateGrayProfileTHR(s->ctx, cmsD50_xyY(), tonecurve); - if (!ref) - return AVERROR(ENOMEM); - - tf = cmsCreateTransformTHR(s->ctx, profile, TYPE_RGB_8, ref, TYPE_GRAY_DBL, - INTENT_RELATIVE_COLORIMETRIC, - cmsFLAGS_NOCACHE | cmsFLAGS_NOOPTIMIZE); - cmsCloseProfile(ref); - if (!tf) { - av_log(s->avctx, AV_LOG_ERROR, "Invalid ICC profile (e.g. CMYK)\n"); - return AVERROR_INVALIDDATA; - } - - cmsDoTransform(tf, testramp, dst, FF_ARRAY_ELEMS(dst)); - cmsDeleteTransform(tf); - - for (int i = 0; i < FF_ARRAY_ELEMS(dst); i++) - delta += fabs(testramp[i][0] / 255.0 - dst[i]); - if (delta < 0.01) { - *out_trc = trc; - return 0; - } - } - - *out_trc = AVCOL_TRC_UNSPECIFIED; - return 0; -} +#include "libavcodec/fflcms2.c" diff --git a/libavfilter/fflcms2.h b/libavfilter/fflcms2.h index 0d238c679f..1ac29e357b 100644 --- a/libavfilter/fflcms2.h +++ b/libavfilter/fflcms2.h @@ -1,5 +1,4 @@ /* - * Copyright (c) 2022 Niklas Haas * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or @@ -17,71 +16,9 @@ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ -/** - * @file - * Various functions for dealing with ICC profiles - */ - #ifndef AVFILTER_FFLCMS2_H #define AVFILTER_FFLCMS2_H -#include "libavutil/csp.h" -#include "libavutil/frame.h" -#include "libavutil/pixfmt.h" - -#include <lcms2.h> - -typedef struct FFIccContext { - void *avctx; - cmsContext ctx; - cmsToneCurve *curves[AVCOL_TRC_NB]; /* tone curve cache */ -} FFIccContext; - -/** - * Initializes an FFIccContext. This must be done prior to using it. - * - * Returns 0 on success, or a negative error code. - */ -int ff_icc_context_init(FFIccContext *s, void *avctx); -void ff_icc_context_uninit(FFIccContext *s); - -/** - * Generate an ICC profile for a given combination of color primaries and - * transfer function. Both values must be set to valid entries (not - * "undefined") for this function to work. - * - * Returns 0 on success, or a negative error code. - */ -int ff_icc_profile_generate(FFIccContext *s, - enum AVColorPrimaries color_prim, - enum AVColorTransferCharacteristic color_trc, - cmsHPROFILE *out_profile); - -/** - * Attach an ICC profile to a frame. Helper wrapper around cmsSaveProfileToMem - * and av_frame_new_side_data_from_buf. - * - * Returns 0 on success, or a negative error code. - */ -int ff_icc_profile_attach(FFIccContext *s, cmsHPROFILE profile, AVFrame *frame); - -/** - * Read the color primaries and white point coefficients encoded by an ICC - * profile, and return the raw values in `out_primaries`. - * - * Returns 0 on success, or a negative error code. - */ -int ff_icc_profile_read_primaries(FFIccContext *s, cmsHPROFILE profile, - AVColorPrimariesDesc *out_primaries); - -/** - * Attempt detecting the transfer characteristic that best approximates the - * transfer function encoded by an ICC profile. Sets `out_trc` to - * AVCOL_TRC_UNSPECIFIED if no clear match can be identified. - * - * Returns 0 on success (including no match), or a negative error code. - */ -int ff_icc_profile_detect_transfer(FFIccContext *s, cmsHPROFILE profile, - enum AVColorTransferCharacteristic *out_trc); +#include "libavcodec/fflcms2.h" #endif /* AVFILTER_FFLCMS2_H */ |