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Diffstat (limited to 'video/csputils.c')
| -rw-r--r-- | video/csputils.c | 1020 |
1 files changed, 1020 insertions, 0 deletions
diff --git a/video/csputils.c b/video/csputils.c new file mode 100644 index 0000000..59200c5 --- /dev/null +++ b/video/csputils.c @@ -0,0 +1,1020 @@ +/* + * Common code related to colorspaces and conversion + * + * Copyleft (C) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de> + * + * mp_invert_cmat based on DarkPlaces engine (relicensed from GPL to LGPL) + * + * This file is part of mpv. + * + * mpv 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. + * + * mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <stdint.h> +#include <math.h> +#include <assert.h> +#include <libavutil/common.h> +#include <libavcodec/avcodec.h> + +#include "mp_image.h" +#include "csputils.h" +#include "options/m_config.h" +#include "options/m_option.h" + +const struct m_opt_choice_alternatives mp_csp_names[] = { + {"auto", MP_CSP_AUTO}, + {"bt.601", MP_CSP_BT_601}, + {"bt.709", MP_CSP_BT_709}, + {"smpte-240m", MP_CSP_SMPTE_240M}, + {"bt.2020-ncl", MP_CSP_BT_2020_NC}, + {"bt.2020-cl", MP_CSP_BT_2020_C}, + {"rgb", MP_CSP_RGB}, + {"xyz", MP_CSP_XYZ}, + {"ycgco", MP_CSP_YCGCO}, + {0} +}; + +const struct m_opt_choice_alternatives mp_csp_levels_names[] = { + {"auto", MP_CSP_LEVELS_AUTO}, + {"limited", MP_CSP_LEVELS_TV}, + {"full", MP_CSP_LEVELS_PC}, + {0} +}; + +const struct m_opt_choice_alternatives mp_csp_prim_names[] = { + {"auto", MP_CSP_PRIM_AUTO}, + {"bt.601-525", MP_CSP_PRIM_BT_601_525}, + {"bt.601-625", MP_CSP_PRIM_BT_601_625}, + {"bt.709", MP_CSP_PRIM_BT_709}, + {"bt.2020", MP_CSP_PRIM_BT_2020}, + {"bt.470m", MP_CSP_PRIM_BT_470M}, + {"apple", MP_CSP_PRIM_APPLE}, + {"adobe", MP_CSP_PRIM_ADOBE}, + {"prophoto", MP_CSP_PRIM_PRO_PHOTO}, + {"cie1931", MP_CSP_PRIM_CIE_1931}, + {"dci-p3", MP_CSP_PRIM_DCI_P3}, + {"display-p3", MP_CSP_PRIM_DISPLAY_P3}, + {"v-gamut", MP_CSP_PRIM_V_GAMUT}, + {"s-gamut", MP_CSP_PRIM_S_GAMUT}, + {"ebu3213", MP_CSP_PRIM_EBU_3213}, + {"film-c", MP_CSP_PRIM_FILM_C}, + {"aces-ap0", MP_CSP_PRIM_ACES_AP0}, + {"aces-ap1", MP_CSP_PRIM_ACES_AP1}, + {0} +}; + +const struct m_opt_choice_alternatives mp_csp_trc_names[] = { + {"auto", MP_CSP_TRC_AUTO}, + {"bt.1886", MP_CSP_TRC_BT_1886}, + {"srgb", MP_CSP_TRC_SRGB}, + {"linear", MP_CSP_TRC_LINEAR}, + {"gamma1.8", MP_CSP_TRC_GAMMA18}, + {"gamma2.0", MP_CSP_TRC_GAMMA20}, + {"gamma2.2", MP_CSP_TRC_GAMMA22}, + {"gamma2.4", MP_CSP_TRC_GAMMA24}, + {"gamma2.6", MP_CSP_TRC_GAMMA26}, + {"gamma2.8", MP_CSP_TRC_GAMMA28}, + {"prophoto", MP_CSP_TRC_PRO_PHOTO}, + {"pq", MP_CSP_TRC_PQ}, + {"hlg", MP_CSP_TRC_HLG}, + {"v-log", MP_CSP_TRC_V_LOG}, + {"s-log1", MP_CSP_TRC_S_LOG1}, + {"s-log2", MP_CSP_TRC_S_LOG2}, + {"st428", MP_CSP_TRC_ST428}, + {0} +}; + +const struct m_opt_choice_alternatives mp_csp_light_names[] = { + {"auto", MP_CSP_LIGHT_AUTO}, + {"display", MP_CSP_LIGHT_DISPLAY}, + {"hlg", MP_CSP_LIGHT_SCENE_HLG}, + {"709-1886", MP_CSP_LIGHT_SCENE_709_1886}, + {"gamma1.2", MP_CSP_LIGHT_SCENE_1_2}, + {0} +}; + +const struct m_opt_choice_alternatives mp_chroma_names[] = { + {"unknown", MP_CHROMA_AUTO}, + {"uhd", MP_CHROMA_TOPLEFT}, + {"mpeg2/4/h264",MP_CHROMA_LEFT}, + {"mpeg1/jpeg", MP_CHROMA_CENTER}, + {0} +}; + +const struct m_opt_choice_alternatives mp_alpha_names[] = { + {"auto", MP_ALPHA_AUTO}, + {"straight", MP_ALPHA_STRAIGHT}, + {"premul", MP_ALPHA_PREMUL}, + {0} +}; + +void mp_colorspace_merge(struct mp_colorspace *orig, struct mp_colorspace *new) +{ + if (!orig->space) + orig->space = new->space; + if (!orig->levels) + orig->levels = new->levels; + if (!orig->primaries) + orig->primaries = new->primaries; + if (!orig->gamma) + orig->gamma = new->gamma; + if (!orig->light) + orig->light = new->light; + pl_hdr_metadata_merge(&orig->hdr, &new->hdr); +} + +// The short name _must_ match with what vf_stereo3d accepts (if supported). +// The long name in comments is closer to the Matroska spec (StereoMode element). +// The numeric index matches the Matroska StereoMode value. If you add entries +// that don't match Matroska, make sure demux_mkv.c rejects them properly. +const struct m_opt_choice_alternatives mp_stereo3d_names[] = { + {"no", -1}, // disable/invalid + {"mono", 0}, + {"sbs2l", 1}, // "side_by_side_left" + {"ab2r", 2}, // "top_bottom_right" + {"ab2l", 3}, // "top_bottom_left" + {"checkr", 4}, // "checkboard_right" (unsupported by vf_stereo3d) + {"checkl", 5}, // "checkboard_left" (unsupported by vf_stereo3d) + {"irr", 6}, // "row_interleaved_right" + {"irl", 7}, // "row_interleaved_left" + {"icr", 8}, // "column_interleaved_right" (unsupported by vf_stereo3d) + {"icl", 9}, // "column_interleaved_left" (unsupported by vf_stereo3d) + {"arcc", 10}, // "anaglyph_cyan_red" (Matroska: unclear which mode) + {"sbs2r", 11}, // "side_by_side_right" + {"agmc", 12}, // "anaglyph_green_magenta" (Matroska: unclear which mode) + {"al", 13}, // "alternating frames left first" + {"ar", 14}, // "alternating frames right first" + {0} +}; + +enum mp_csp avcol_spc_to_mp_csp(int avcolorspace) +{ + switch (avcolorspace) { + case AVCOL_SPC_BT709: return MP_CSP_BT_709; + case AVCOL_SPC_BT470BG: return MP_CSP_BT_601; + case AVCOL_SPC_BT2020_NCL: return MP_CSP_BT_2020_NC; + case AVCOL_SPC_BT2020_CL: return MP_CSP_BT_2020_C; + case AVCOL_SPC_SMPTE170M: return MP_CSP_BT_601; + case AVCOL_SPC_SMPTE240M: return MP_CSP_SMPTE_240M; + case AVCOL_SPC_RGB: return MP_CSP_RGB; + case AVCOL_SPC_YCOCG: return MP_CSP_YCGCO; + default: return MP_CSP_AUTO; + } +} + +enum mp_csp_levels avcol_range_to_mp_csp_levels(int avrange) +{ + switch (avrange) { + case AVCOL_RANGE_MPEG: return MP_CSP_LEVELS_TV; + case AVCOL_RANGE_JPEG: return MP_CSP_LEVELS_PC; + default: return MP_CSP_LEVELS_AUTO; + } +} + +enum mp_csp_prim avcol_pri_to_mp_csp_prim(int avpri) +{ + switch (avpri) { + case AVCOL_PRI_SMPTE240M: // Same as below + case AVCOL_PRI_SMPTE170M: return MP_CSP_PRIM_BT_601_525; + case AVCOL_PRI_BT470BG: return MP_CSP_PRIM_BT_601_625; + case AVCOL_PRI_BT709: return MP_CSP_PRIM_BT_709; + case AVCOL_PRI_BT2020: return MP_CSP_PRIM_BT_2020; + case AVCOL_PRI_BT470M: return MP_CSP_PRIM_BT_470M; + case AVCOL_PRI_SMPTE431: return MP_CSP_PRIM_DCI_P3; + case AVCOL_PRI_SMPTE432: return MP_CSP_PRIM_DISPLAY_P3; + default: return MP_CSP_PRIM_AUTO; + } +} + +enum mp_csp_trc avcol_trc_to_mp_csp_trc(int avtrc) +{ + switch (avtrc) { + case AVCOL_TRC_BT709: + case AVCOL_TRC_SMPTE170M: + case AVCOL_TRC_SMPTE240M: + case AVCOL_TRC_BT1361_ECG: + case AVCOL_TRC_BT2020_10: + case AVCOL_TRC_BT2020_12: return MP_CSP_TRC_BT_1886; + case AVCOL_TRC_IEC61966_2_1: return MP_CSP_TRC_SRGB; + case AVCOL_TRC_LINEAR: return MP_CSP_TRC_LINEAR; + case AVCOL_TRC_GAMMA22: return MP_CSP_TRC_GAMMA22; + case AVCOL_TRC_GAMMA28: return MP_CSP_TRC_GAMMA28; + case AVCOL_TRC_SMPTEST2084: return MP_CSP_TRC_PQ; + case AVCOL_TRC_ARIB_STD_B67: return MP_CSP_TRC_HLG; + case AVCOL_TRC_SMPTE428: return MP_CSP_TRC_ST428; + default: return MP_CSP_TRC_AUTO; + } +} + +int mp_csp_to_avcol_spc(enum mp_csp colorspace) +{ + switch (colorspace) { + case MP_CSP_BT_709: return AVCOL_SPC_BT709; + case MP_CSP_BT_601: return AVCOL_SPC_BT470BG; + case MP_CSP_BT_2020_NC: return AVCOL_SPC_BT2020_NCL; + case MP_CSP_BT_2020_C: return AVCOL_SPC_BT2020_CL; + case MP_CSP_SMPTE_240M: return AVCOL_SPC_SMPTE240M; + case MP_CSP_RGB: return AVCOL_SPC_RGB; + case MP_CSP_YCGCO: return AVCOL_SPC_YCOCG; + default: return AVCOL_SPC_UNSPECIFIED; + } +} + +int mp_csp_levels_to_avcol_range(enum mp_csp_levels range) +{ + switch (range) { + case MP_CSP_LEVELS_TV: return AVCOL_RANGE_MPEG; + case MP_CSP_LEVELS_PC: return AVCOL_RANGE_JPEG; + default: return AVCOL_RANGE_UNSPECIFIED; + } +} + +int mp_csp_prim_to_avcol_pri(enum mp_csp_prim prim) +{ + switch (prim) { + case MP_CSP_PRIM_BT_601_525: return AVCOL_PRI_SMPTE170M; + case MP_CSP_PRIM_BT_601_625: return AVCOL_PRI_BT470BG; + case MP_CSP_PRIM_BT_709: return AVCOL_PRI_BT709; + case MP_CSP_PRIM_BT_2020: return AVCOL_PRI_BT2020; + case MP_CSP_PRIM_BT_470M: return AVCOL_PRI_BT470M; + case MP_CSP_PRIM_DCI_P3: return AVCOL_PRI_SMPTE431; + case MP_CSP_PRIM_DISPLAY_P3: return AVCOL_PRI_SMPTE432; + default: return AVCOL_PRI_UNSPECIFIED; + } +} + +int mp_csp_trc_to_avcol_trc(enum mp_csp_trc trc) +{ + switch (trc) { + // We just call it BT.1886 since we're decoding, but it's still BT.709 + case MP_CSP_TRC_BT_1886: return AVCOL_TRC_BT709; + case MP_CSP_TRC_SRGB: return AVCOL_TRC_IEC61966_2_1; + case MP_CSP_TRC_LINEAR: return AVCOL_TRC_LINEAR; + case MP_CSP_TRC_GAMMA22: return AVCOL_TRC_GAMMA22; + case MP_CSP_TRC_GAMMA28: return AVCOL_TRC_GAMMA28; + case MP_CSP_TRC_PQ: return AVCOL_TRC_SMPTEST2084; + case MP_CSP_TRC_HLG: return AVCOL_TRC_ARIB_STD_B67; + case MP_CSP_TRC_ST428: return AVCOL_TRC_SMPTE428; + default: return AVCOL_TRC_UNSPECIFIED; + } +} + +enum mp_csp mp_csp_guess_colorspace(int width, int height) +{ + return width >= 1280 || height > 576 ? MP_CSP_BT_709 : MP_CSP_BT_601; +} + +enum mp_csp_prim mp_csp_guess_primaries(int width, int height) +{ + // HD content + if (width >= 1280 || height > 576) + return MP_CSP_PRIM_BT_709; + + switch (height) { + case 576: // Typical PAL content, including anamorphic/squared + return MP_CSP_PRIM_BT_601_625; + + case 480: // Typical NTSC content, including squared + case 486: // NTSC Pro or anamorphic NTSC + return MP_CSP_PRIM_BT_601_525; + + default: // No good metric, just pick BT.709 to minimize damage + return MP_CSP_PRIM_BT_709; + } +} + +enum mp_chroma_location avchroma_location_to_mp(int avloc) +{ + switch (avloc) { + case AVCHROMA_LOC_TOPLEFT: return MP_CHROMA_TOPLEFT; + case AVCHROMA_LOC_LEFT: return MP_CHROMA_LEFT; + case AVCHROMA_LOC_CENTER: return MP_CHROMA_CENTER; + default: return MP_CHROMA_AUTO; + } +} + +int mp_chroma_location_to_av(enum mp_chroma_location mploc) +{ + switch (mploc) { + case MP_CHROMA_TOPLEFT: return AVCHROMA_LOC_TOPLEFT; + case MP_CHROMA_LEFT: return AVCHROMA_LOC_LEFT; + case MP_CHROMA_CENTER: return AVCHROMA_LOC_CENTER; + default: return AVCHROMA_LOC_UNSPECIFIED; + } +} + +// Return location of chroma samples relative to luma samples. 0/0 means +// centered. Other possible values are -1 (top/left) and +1 (right/bottom). +void mp_get_chroma_location(enum mp_chroma_location loc, int *x, int *y) +{ + *x = 0; + *y = 0; + if (loc == MP_CHROMA_LEFT || loc == MP_CHROMA_TOPLEFT) + *x = -1; + if (loc == MP_CHROMA_TOPLEFT) + *y = -1; +} + +void mp_invert_matrix3x3(float m[3][3]) +{ + float m00 = m[0][0], m01 = m[0][1], m02 = m[0][2], + m10 = m[1][0], m11 = m[1][1], m12 = m[1][2], + m20 = m[2][0], m21 = m[2][1], m22 = m[2][2]; + + // calculate the adjoint + m[0][0] = (m11 * m22 - m21 * m12); + m[0][1] = -(m01 * m22 - m21 * m02); + m[0][2] = (m01 * m12 - m11 * m02); + m[1][0] = -(m10 * m22 - m20 * m12); + m[1][1] = (m00 * m22 - m20 * m02); + m[1][2] = -(m00 * m12 - m10 * m02); + m[2][0] = (m10 * m21 - m20 * m11); + m[2][1] = -(m00 * m21 - m20 * m01); + m[2][2] = (m00 * m11 - m10 * m01); + + // calculate the determinant (as inverse == 1/det * adjoint, + // adjoint * m == identity * det, so this calculates the det) + float det = m00 * m[0][0] + m10 * m[0][1] + m20 * m[0][2]; + det = 1.0f / det; + + for (int i = 0; i < 3; i++) { + for (int j = 0; j < 3; j++) + m[i][j] *= det; + } +} + +// A := A * B +static void mp_mul_matrix3x3(float a[3][3], float b[3][3]) +{ + float a00 = a[0][0], a01 = a[0][1], a02 = a[0][2], + a10 = a[1][0], a11 = a[1][1], a12 = a[1][2], + a20 = a[2][0], a21 = a[2][1], a22 = a[2][2]; + + for (int i = 0; i < 3; i++) { + a[0][i] = a00 * b[0][i] + a01 * b[1][i] + a02 * b[2][i]; + a[1][i] = a10 * b[0][i] + a11 * b[1][i] + a12 * b[2][i]; + a[2][i] = a20 * b[0][i] + a21 * b[1][i] + a22 * b[2][i]; + } +} + +// return the primaries associated with a certain mp_csp_primaries val +struct mp_csp_primaries mp_get_csp_primaries(enum mp_csp_prim spc) +{ + /* + Values from: ITU-R Recommendations BT.470-6, BT.601-7, BT.709-5, BT.2020-0 + + https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.470-6-199811-S!!PDF-E.pdf + https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.601-7-201103-I!!PDF-E.pdf + https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.709-5-200204-I!!PDF-E.pdf + https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.2020-0-201208-I!!PDF-E.pdf + + Other colorspaces from https://en.wikipedia.org/wiki/RGB_color_space#Specifications + */ + + // CIE standard illuminant series + static const struct mp_csp_col_xy + d50 = {0.34577, 0.35850}, + d65 = {0.31271, 0.32902}, + c = {0.31006, 0.31616}, + dci = {0.31400, 0.35100}, + e = {1.0/3.0, 1.0/3.0}; + + switch (spc) { + case MP_CSP_PRIM_BT_470M: + return (struct mp_csp_primaries) { + .red = {0.670, 0.330}, + .green = {0.210, 0.710}, + .blue = {0.140, 0.080}, + .white = c + }; + case MP_CSP_PRIM_BT_601_525: + return (struct mp_csp_primaries) { + .red = {0.630, 0.340}, + .green = {0.310, 0.595}, + .blue = {0.155, 0.070}, + .white = d65 + }; + case MP_CSP_PRIM_BT_601_625: + return (struct mp_csp_primaries) { + .red = {0.640, 0.330}, + .green = {0.290, 0.600}, + .blue = {0.150, 0.060}, + .white = d65 + }; + // This is the default assumption if no colorspace information could + // be determined, eg. for files which have no video channel. + case MP_CSP_PRIM_AUTO: + case MP_CSP_PRIM_BT_709: + return (struct mp_csp_primaries) { + .red = {0.640, 0.330}, + .green = {0.300, 0.600}, + .blue = {0.150, 0.060}, + .white = d65 + }; + case MP_CSP_PRIM_BT_2020: + return (struct mp_csp_primaries) { + .red = {0.708, 0.292}, + .green = {0.170, 0.797}, + .blue = {0.131, 0.046}, + .white = d65 + }; + case MP_CSP_PRIM_APPLE: + return (struct mp_csp_primaries) { + .red = {0.625, 0.340}, + .green = {0.280, 0.595}, + .blue = {0.115, 0.070}, + .white = d65 + }; + case MP_CSP_PRIM_ADOBE: + return (struct mp_csp_primaries) { + .red = {0.640, 0.330}, + .green = {0.210, 0.710}, + .blue = {0.150, 0.060}, + .white = d65 + }; + case MP_CSP_PRIM_PRO_PHOTO: + return (struct mp_csp_primaries) { + .red = {0.7347, 0.2653}, + .green = {0.1596, 0.8404}, + .blue = {0.0366, 0.0001}, + .white = d50 + }; + case MP_CSP_PRIM_CIE_1931: + return (struct mp_csp_primaries) { + .red = {0.7347, 0.2653}, + .green = {0.2738, 0.7174}, + .blue = {0.1666, 0.0089}, + .white = e + }; + // From SMPTE RP 431-2 and 432-1 + case MP_CSP_PRIM_DCI_P3: + case MP_CSP_PRIM_DISPLAY_P3: + return (struct mp_csp_primaries) { + .red = {0.680, 0.320}, + .green = {0.265, 0.690}, + .blue = {0.150, 0.060}, + .white = spc == MP_CSP_PRIM_DCI_P3 ? dci : d65 + }; + // From Panasonic VARICAM reference manual + case MP_CSP_PRIM_V_GAMUT: + return (struct mp_csp_primaries) { + .red = {0.730, 0.280}, + .green = {0.165, 0.840}, + .blue = {0.100, -0.03}, + .white = d65 + }; + // From Sony S-Log reference manual + case MP_CSP_PRIM_S_GAMUT: + return (struct mp_csp_primaries) { + .red = {0.730, 0.280}, + .green = {0.140, 0.855}, + .blue = {0.100, -0.05}, + .white = d65 + }; + // from EBU Tech. 3213-E + case MP_CSP_PRIM_EBU_3213: + return (struct mp_csp_primaries) { + .red = {0.630, 0.340}, + .green = {0.295, 0.605}, + .blue = {0.155, 0.077}, + .white = d65 + }; + // From H.273, traditional film with Illuminant C + case MP_CSP_PRIM_FILM_C: + return (struct mp_csp_primaries) { + .red = {0.681, 0.319}, + .green = {0.243, 0.692}, + .blue = {0.145, 0.049}, + .white = c + }; + // From libplacebo source code + case MP_CSP_PRIM_ACES_AP0: + return (struct mp_csp_primaries) { + .red = {0.7347, 0.2653}, + .green = {0.0000, 1.0000}, + .blue = {0.0001, -0.0770}, + .white = {0.32168, 0.33767}, + }; + // From libplacebo source code + case MP_CSP_PRIM_ACES_AP1: + return (struct mp_csp_primaries) { + .red = {0.713, 0.293}, + .green = {0.165, 0.830}, + .blue = {0.128, 0.044}, + .white = {0.32168, 0.33767}, + }; + default: + return (struct mp_csp_primaries) {{0}}; + } +} + +// Get the nominal peak for a given colorspace, relative to the reference white +// level. In other words, this returns the brightest encodable value that can +// be represented by a given transfer curve. +float mp_trc_nom_peak(enum mp_csp_trc trc) +{ + switch (trc) { + case MP_CSP_TRC_PQ: return 10000.0 / MP_REF_WHITE; + case MP_CSP_TRC_HLG: return 12.0 / MP_REF_WHITE_HLG; + case MP_CSP_TRC_V_LOG: return 46.0855; + case MP_CSP_TRC_S_LOG1: return 6.52; + case MP_CSP_TRC_S_LOG2: return 9.212; + } + + return 1.0; +} + +bool mp_trc_is_hdr(enum mp_csp_trc trc) +{ + return mp_trc_nom_peak(trc) > 1.0; +} + +// Compute the RGB/XYZ matrix as described here: +// http://www.brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html +void mp_get_rgb2xyz_matrix(struct mp_csp_primaries space, float m[3][3]) +{ + float S[3], X[4], Z[4]; + + // Convert from CIE xyY to XYZ. Note that Y=1 holds true for all primaries + X[0] = space.red.x / space.red.y; + X[1] = space.green.x / space.green.y; + X[2] = space.blue.x / space.blue.y; + X[3] = space.white.x / space.white.y; + + Z[0] = (1 - space.red.x - space.red.y) / space.red.y; + Z[1] = (1 - space.green.x - space.green.y) / space.green.y; + Z[2] = (1 - space.blue.x - space.blue.y) / space.blue.y; + Z[3] = (1 - space.white.x - space.white.y) / space.white.y; + + // S = XYZ^-1 * W + for (int i = 0; i < 3; i++) { + m[0][i] = X[i]; + m[1][i] = 1; + m[2][i] = Z[i]; + } + + mp_invert_matrix3x3(m); + + for (int i = 0; i < 3; i++) + S[i] = m[i][0] * X[3] + m[i][1] * 1 + m[i][2] * Z[3]; + + // M = [Sc * XYZc] + for (int i = 0; i < 3; i++) { + m[0][i] = S[i] * X[i]; + m[1][i] = S[i] * 1; + m[2][i] = S[i] * Z[i]; + } +} + +// M := M * XYZd<-XYZs +static void mp_apply_chromatic_adaptation(struct mp_csp_col_xy src, + struct mp_csp_col_xy dest, float m[3][3]) +{ + // If the white points are nearly identical, this is a wasteful identity + // operation. + if (fabs(src.x - dest.x) < 1e-6 && fabs(src.y - dest.y) < 1e-6) + return; + + // XYZd<-XYZs = Ma^-1 * (I*[Cd/Cs]) * Ma + // http://www.brucelindbloom.com/index.html?Eqn_ChromAdapt.html + float C[3][2], tmp[3][3] = {{0}}; + + // Ma = Bradford matrix, arguably most popular method in use today. + // This is derived experimentally and thus hard-coded. + float bradford[3][3] = { + { 0.8951, 0.2664, -0.1614 }, + { -0.7502, 1.7135, 0.0367 }, + { 0.0389, -0.0685, 1.0296 }, + }; + + for (int i = 0; i < 3; i++) { + // source cone + C[i][0] = bradford[i][0] * mp_xy_X(src) + + bradford[i][1] * 1 + + bradford[i][2] * mp_xy_Z(src); + + // dest cone + C[i][1] = bradford[i][0] * mp_xy_X(dest) + + bradford[i][1] * 1 + + bradford[i][2] * mp_xy_Z(dest); + } + + // tmp := I * [Cd/Cs] * Ma + for (int i = 0; i < 3; i++) + tmp[i][i] = C[i][1] / C[i][0]; + + mp_mul_matrix3x3(tmp, bradford); + + // M := M * Ma^-1 * tmp + mp_invert_matrix3x3(bradford); + mp_mul_matrix3x3(m, bradford); + mp_mul_matrix3x3(m, tmp); +} + +// get the coefficients of the source -> dest cms matrix +void mp_get_cms_matrix(struct mp_csp_primaries src, struct mp_csp_primaries dest, + enum mp_render_intent intent, float m[3][3]) +{ + float tmp[3][3]; + + // In saturation mapping, we don't care about accuracy and just want + // primaries to map to primaries, making this an identity transformation. + if (intent == MP_INTENT_SATURATION) { + for (int i = 0; i < 3; i++) + m[i][i] = 1; + return; + } + + // RGBd<-RGBs = RGBd<-XYZd * XYZd<-XYZs * XYZs<-RGBs + // Equations from: http://www.brucelindbloom.com/index.html?Math.html + // Note: Perceptual is treated like relative colorimetric. There's no + // definition for perceptual other than "make it look good". + + // RGBd<-XYZd, inverted from XYZd<-RGBd + mp_get_rgb2xyz_matrix(dest, m); + mp_invert_matrix3x3(m); + + // Chromatic adaptation, except in absolute colorimetric intent + if (intent != MP_INTENT_ABSOLUTE_COLORIMETRIC) + mp_apply_chromatic_adaptation(src.white, dest.white, m); + + // XYZs<-RGBs + mp_get_rgb2xyz_matrix(src, tmp); + mp_mul_matrix3x3(m, tmp); +} + +// get the coefficients of an ST 428-1 xyz -> rgb conversion matrix +// intent = the rendering intent used to convert to the target primaries +static void mp_get_xyz2rgb_coeffs(struct mp_csp_params *params, + enum mp_render_intent intent, struct mp_cmat *m) +{ + // Convert to DCI-P3 + struct mp_csp_primaries prim = mp_get_csp_primaries(MP_CSP_PRIM_DCI_P3); + float brightness = params->brightness; + mp_get_rgb2xyz_matrix(prim, m->m); + mp_invert_matrix3x3(m->m); + + // All non-absolute mappings want to map source white to target white + if (intent != MP_INTENT_ABSOLUTE_COLORIMETRIC) { + // SMPTE EG 432-1 Annex H defines the white point as equal energy + static const struct mp_csp_col_xy smpte432 = {1.0/3.0, 1.0/3.0}; + mp_apply_chromatic_adaptation(smpte432, prim.white, m->m); + } + + // Since this outputs linear RGB rather than companded RGB, we + // want to linearize any brightness additions. 2 is a reasonable + // approximation for any sort of gamma function that could be in use. + // As this is an aesthetic setting only, any exact values do not matter. + brightness *= fabs(brightness); + + for (int i = 0; i < 3; i++) + m->c[i] = brightness; +} + +// Get multiplication factor required if image data is fit within the LSBs of a +// higher smaller bit depth fixed-point texture data. +// This is broken. Use mp_get_csp_uint_mul(). +double mp_get_csp_mul(enum mp_csp csp, int input_bits, int texture_bits) +{ + assert(texture_bits >= input_bits); + + // Convenience for some irrelevant cases, e.g. rgb565 or disabling expansion. + if (!input_bits) + return 1; + + // RGB always uses the full range available. + if (csp == MP_CSP_RGB) + return ((1LL << input_bits) - 1.) / ((1LL << texture_bits) - 1.); + + if (csp == MP_CSP_XYZ) + return 1; + + // High bit depth YUV uses a range shifted from 8 bit. + return (1LL << input_bits) / ((1LL << texture_bits) - 1.) * 255 / 256; +} + +// Return information about color fixed point representation.his is needed for +// converting color from integer formats to or from float. Use as follows: +// float_val = uint_val * m + o +// uint_val = clamp(round((float_val - o) / m)) +// See H.264/5 Annex E. +// csp: colorspace +// levels: full range flag +// component: ID of the channel, as in mp_regular_imgfmt: +// 1 is red/luminance/gray, 2 is green/Cb, 3 is blue/Cr, 4 is alpha. +// bits: number of significant bits, e.g. 10 for yuv420p10, 16 for p010 +// out_m: returns factor to multiply the uint number with +// out_o: returns offset to add after multiplication +void mp_get_csp_uint_mul(enum mp_csp csp, enum mp_csp_levels levels, + int bits, int component, double *out_m, double *out_o) +{ + uint16_t i_min = 0; + uint16_t i_max = (1u << bits) - 1; + double f_min = 0; // min. float value + + if (csp != MP_CSP_RGB && component != 4) { + if (component == 2 || component == 3) { + f_min = (1u << (bits - 1)) / -(double)i_max; // force center => 0 + + if (levels != MP_CSP_LEVELS_PC && bits >= 8) { + i_min = 16 << (bits - 8); // => -0.5 + i_max = 240 << (bits - 8); // => 0.5 + f_min = -0.5; + } + } else { + if (levels != MP_CSP_LEVELS_PC && bits >= 8) { + i_min = 16 << (bits - 8); // => 0 + i_max = 235 << (bits - 8); // => 1 + } + } + } + + *out_m = 1.0 / (i_max - i_min); + *out_o = (1 + f_min) - i_max * *out_m; +} + +/* Fill in the Y, U, V vectors of a yuv-to-rgb conversion matrix + * based on the given luma weights of the R, G and B components (lr, lg, lb). + * lr+lg+lb is assumed to equal 1. + * This function is meant for colorspaces satisfying the following + * conditions (which are true for common YUV colorspaces): + * - The mapping from input [Y, U, V] to output [R, G, B] is linear. + * - Y is the vector [1, 1, 1]. (meaning input Y component maps to 1R+1G+1B) + * - U maps to a value with zero R and positive B ([0, x, y], y > 0; + * i.e. blue and green only). + * - V maps to a value with zero B and positive R ([x, y, 0], x > 0; + * i.e. red and green only). + * - U and V are orthogonal to the luma vector [lr, lg, lb]. + * - The magnitudes of the vectors U and V are the minimal ones for which + * the image of the set Y=[0...1],U=[-0.5...0.5],V=[-0.5...0.5] under the + * conversion function will cover the set R=[0...1],G=[0...1],B=[0...1] + * (the resulting matrix can be converted for other input/output ranges + * outside this function). + * Under these conditions the given parameters lr, lg, lb uniquely + * determine the mapping of Y, U, V to R, G, B. + */ +static void luma_coeffs(struct mp_cmat *mat, float lr, float lg, float lb) +{ + assert(fabs(lr+lg+lb - 1) < 1e-6); + *mat = (struct mp_cmat) { + { {1, 0, 2 * (1-lr) }, + {1, -2 * (1-lb) * lb/lg, -2 * (1-lr) * lr/lg }, + {1, 2 * (1-lb), 0 } }, + // Constant coefficients (mat->c) not set here + }; +} + +// get the coefficients of the yuv -> rgb conversion matrix +void mp_get_csp_matrix(struct mp_csp_params *params, struct mp_cmat *m) +{ + enum mp_csp colorspace = params->color.space; + if (colorspace <= MP_CSP_AUTO || colorspace >= MP_CSP_COUNT) + colorspace = MP_CSP_BT_601; + enum mp_csp_levels levels_in = params->color.levels; + if (levels_in <= MP_CSP_LEVELS_AUTO || levels_in >= MP_CSP_LEVELS_COUNT) + levels_in = MP_CSP_LEVELS_TV; + + switch (colorspace) { + case MP_CSP_BT_601: luma_coeffs(m, 0.299, 0.587, 0.114 ); break; + case MP_CSP_BT_709: luma_coeffs(m, 0.2126, 0.7152, 0.0722); break; + case MP_CSP_SMPTE_240M: luma_coeffs(m, 0.2122, 0.7013, 0.0865); break; + case MP_CSP_BT_2020_NC: luma_coeffs(m, 0.2627, 0.6780, 0.0593); break; + case MP_CSP_BT_2020_C: { + // Note: This outputs into the [-0.5,0.5] range for chroma information. + // If this clips on any VO, a constant 0.5 coefficient can be added + // to the chroma channels to normalize them into [0,1]. This is not + // currently needed by anything, though. + *m = (struct mp_cmat){{{0, 0, 1}, {1, 0, 0}, {0, 1, 0}}}; + break; + } + case MP_CSP_RGB: { + *m = (struct mp_cmat){{{1, 0, 0}, {0, 1, 0}, {0, 0, 1}}}; + levels_in = -1; + break; + } + case MP_CSP_XYZ: { + // The vo should probably not be using a matrix generated by this + // function for XYZ sources, but if it does, let's just convert it to + // an equivalent RGB space based on the colorimetry metadata it + // provided in mp_csp_params. (At the risk of clipping, if the + // chosen primaries are too small to fit the actual data) + mp_get_xyz2rgb_coeffs(params, MP_INTENT_RELATIVE_COLORIMETRIC, m); + levels_in = -1; + break; + } + case MP_CSP_YCGCO: { + *m = (struct mp_cmat) { + {{1, -1, 1}, + {1, 1, 0}, + {1, -1, -1}}, + }; + break; + } + default: + MP_ASSERT_UNREACHABLE(); + }; + + if (params->is_float) + levels_in = -1; + + if ((colorspace == MP_CSP_BT_601 || colorspace == MP_CSP_BT_709 || + colorspace == MP_CSP_SMPTE_240M || colorspace == MP_CSP_BT_2020_NC)) + { + // Hue is equivalent to rotating input [U, V] subvector around the origin. + // Saturation scales [U, V]. + float huecos = params->gray ? 0 : params->saturation * cos(params->hue); + float huesin = params->gray ? 0 : params->saturation * sin(params->hue); + for (int i = 0; i < 3; i++) { + float u = m->m[i][1], v = m->m[i][2]; + m->m[i][1] = huecos * u - huesin * v; + m->m[i][2] = huesin * u + huecos * v; + } + } + + // The values below are written in 0-255 scale - thus bring s into range. + double s = + mp_get_csp_mul(colorspace, params->input_bits, params->texture_bits) / 255; + // NOTE: The yuvfull ranges as presented here are arguably ambiguous, + // and conflict with at least the full-range YCbCr/ICtCp values as defined + // by ITU-R BT.2100. If somebody ever complains about full-range YUV looking + // different from their reference display, this comment is probably why. + struct yuvlevels { double ymin, ymax, cmax, cmid; } + yuvlim = { 16*s, 235*s, 240*s, 128*s }, + yuvfull = { 0*s, 255*s, 255*s, 128*s }, + anyfull = { 0*s, 255*s, 255*s/2, 0 }, // cmax picked to make cmul=ymul + yuvlev; + switch (levels_in) { + case MP_CSP_LEVELS_TV: yuvlev = yuvlim; break; + case MP_CSP_LEVELS_PC: yuvlev = yuvfull; break; + case -1: yuvlev = anyfull; break; + default: + MP_ASSERT_UNREACHABLE(); + } + + int levels_out = params->levels_out; + if (levels_out <= MP_CSP_LEVELS_AUTO || levels_out >= MP_CSP_LEVELS_COUNT) + levels_out = MP_CSP_LEVELS_PC; + struct rgblevels { double min, max; } + rgblim = { 16/255., 235/255. }, + rgbfull = { 0, 1 }, + rgblev; + switch (levels_out) { + case MP_CSP_LEVELS_TV: rgblev = rgblim; break; + case MP_CSP_LEVELS_PC: rgblev = rgbfull; break; + default: + MP_ASSERT_UNREACHABLE(); + } + + double ymul = (rgblev.max - rgblev.min) / (yuvlev.ymax - yuvlev.ymin); + double cmul = (rgblev.max - rgblev.min) / (yuvlev.cmax - yuvlev.cmid) / 2; + + // Contrast scales the output value range (gain) + ymul *= params->contrast; + cmul *= params->contrast; + + for (int i = 0; i < 3; i++) { + m->m[i][0] *= ymul; + m->m[i][1] *= cmul; + m->m[i][2] *= cmul; + // Set c so that Y=umin,UV=cmid maps to RGB=min (black to black), + // also add brightness offset (black lift) + m->c[i] = rgblev.min - m->m[i][0] * yuvlev.ymin + - (m->m[i][1] + m->m[i][2]) * yuvlev.cmid + + params->brightness; + } +} + +// Set colorspace related fields in p from f. Don't touch other fields. +void mp_csp_set_image_params(struct mp_csp_params *params, + const struct mp_image_params *imgparams) +{ + struct mp_image_params p = *imgparams; + mp_image_params_guess_csp(&p); // ensure consistency + params->color = p.color; +} + +bool mp_colorspace_equal(struct mp_colorspace c1, struct mp_colorspace c2) +{ + return c1.space == c2.space && + c1.levels == c2.levels && + c1.primaries == c2.primaries && + c1.gamma == c2.gamma && + c1.light == c2.light && + pl_hdr_metadata_equal(&c1.hdr, &c2.hdr); +} + +enum mp_csp_equalizer_param { + MP_CSP_EQ_BRIGHTNESS, + MP_CSP_EQ_CONTRAST, + MP_CSP_EQ_HUE, + MP_CSP_EQ_SATURATION, + MP_CSP_EQ_GAMMA, + MP_CSP_EQ_COUNT, +}; + +// Default initialization with 0 is enough, except for the capabilities field +struct mp_csp_equalizer_opts { + // Value for each property is in the range [-100.0, 100.0]. + // 0.0 is default, meaning neutral or no change. + float values[MP_CSP_EQ_COUNT]; + int output_levels; +}; + +#define OPT_BASE_STRUCT struct mp_csp_equalizer_opts + +const struct m_sub_options mp_csp_equalizer_conf = { + .opts = (const m_option_t[]) { + {"brightness", OPT_FLOAT(values[MP_CSP_EQ_BRIGHTNESS]), + M_RANGE(-100, 100)}, + {"saturation", OPT_FLOAT(values[MP_CSP_EQ_SATURATION]), + M_RANGE(-100, 100)}, + {"contrast", OPT_FLOAT(values[MP_CSP_EQ_CONTRAST]), + M_RANGE(-100, 100)}, + {"hue", OPT_FLOAT(values[MP_CSP_EQ_HUE]), + M_RANGE(-100, 100)}, + {"gamma", OPT_FLOAT(values[MP_CSP_EQ_GAMMA]), + M_RANGE(-100, 100)}, + {"video-output-levels", + OPT_CHOICE_C(output_levels, mp_csp_levels_names)}, + {0} + }, + .size = sizeof(struct mp_csp_equalizer_opts), +}; + +// Copy settings from eq into params. +static void mp_csp_copy_equalizer_values(struct mp_csp_params *params, + const struct mp_csp_equalizer_opts *eq) +{ + params->brightness = eq->values[MP_CSP_EQ_BRIGHTNESS] / 100.0; + params->contrast = (eq->values[MP_CSP_EQ_CONTRAST] + 100) / 100.0; + params->hue = eq->values[MP_CSP_EQ_HUE] / 100.0 * M_PI; + params->saturation = (eq->values[MP_CSP_EQ_SATURATION] + 100) / 100.0; + params->gamma = exp(log(8.0) * eq->values[MP_CSP_EQ_GAMMA] / 100.0); + params->levels_out = eq->output_levels; +} + +struct mp_csp_equalizer_state *mp_csp_equalizer_create(void *ta_parent, + struct mpv_global *global) +{ + struct m_config_cache *c = m_config_cache_alloc(ta_parent, global, + &mp_csp_equalizer_conf); + // The terrible, terrible truth. + return (struct mp_csp_equalizer_state *)c; +} + +bool mp_csp_equalizer_state_changed(struct mp_csp_equalizer_state *state) +{ + struct m_config_cache *c = (struct m_config_cache *)state; + return m_config_cache_update(c); +} + +void mp_csp_equalizer_state_get(struct mp_csp_equalizer_state *state, + struct mp_csp_params *params) +{ + struct m_config_cache *c = (struct m_config_cache *)state; + m_config_cache_update(c); + struct mp_csp_equalizer_opts *opts = c->opts; + mp_csp_copy_equalizer_values(params, opts); +} + +void mp_invert_cmat(struct mp_cmat *out, struct mp_cmat *in) +{ + *out = *in; + mp_invert_matrix3x3(out->m); + + // fix the constant coefficient + // rgb = M * yuv + C + // M^-1 * rgb = yuv + M^-1 * C + // yuv = M^-1 * rgb - M^-1 * C + // ^^^^^^^^^^ + out->c[0] = -(out->m[0][0] * in->c[0] + out->m[0][1] * in->c[1] + out->m[0][2] * in->c[2]); + out->c[1] = -(out->m[1][0] * in->c[0] + out->m[1][1] * in->c[1] + out->m[1][2] * in->c[2]); + out->c[2] = -(out->m[2][0] * in->c[0] + out->m[2][1] * in->c[1] + out->m[2][2] * in->c[2]); +} + +// Multiply the color in c with the given matrix. +// i/o is {R, G, B} or {Y, U, V} (depending on input/output and matrix), using +// a fixed point representation with the given number of bits (so for bits==8, +// [0,255] maps to [0,1]). The output is clipped to the range as needed. +void mp_map_fixp_color(struct mp_cmat *matrix, int ibits, int in[3], + int obits, int out[3]) +{ + for (int i = 0; i < 3; i++) { + double val = matrix->c[i]; + for (int x = 0; x < 3; x++) + val += matrix->m[i][x] * in[x] / ((1 << ibits) - 1); + int ival = lrint(val * ((1 << obits) - 1)); + out[i] = av_clip(ival, 0, (1 << obits) - 1); + } +} |