mpv/video/csputils.c

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/*
* Common code related to colorspaces and conversion
*
* Copyleft (C) 2009 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
*
2012-10-24 18:20:13 +00:00
* mp_invert_yuv2rgb based on DarkPlaces engine, original code (GPL2 or later)
*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* You can alternatively redistribute this file 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.
*/
#include <stdint.h>
#include <math.h>
csputils/vo_gl: rewrite YUV->RGB matrix generation Rewrite the csputils.c code generating a conversion matrix for YUV->RGB conversions (currently used by vo_gl only). Functional differences: - The separate "mplayer default" colorspace is removed, and BT.601 is used instead (the default colorspace was in fact BT.601; see below). - The old code was missing chroma scaling. As a result the "mplayer default" colorspace actually mapped to BT.601, and everything else was buggy (I guess the other colorspaces were added with particular coefficient semantics, without understanding that the original "default colorspace" was actually BT.601 and why its coefficients differed from the added version). - The old code had a bug in the equalizer hue equations. - The old code assumed that for specifying whether input and output were limited-range or full-range YUV or RGB it would make sense to specify "no conversion" meaning full-range YUV to full-range RGB or limited-range YUV to limited-range RGB. This isn't true; limited- range YUV has different ranges for luma and chroma (16-235 vs 16-240) which means you have to scale chroma for limited->limited conversions. The new code assumes limited->limited conversions for the levelconv parameter 2. It'd probably make sense to change the API later to specify the ranges of input and output separately. - The undocumented EBU and XYZ colorspaces are removed. I doubt any videos use these. Also the EBU colorspace looks like it'd expect a different input range - at least no input would map to full RGB red as it was.
2011-08-29 02:38:44 +00:00
#include <assert.h>
#include <libavutil/common.h>
#include "csputils.h"
video, options: implement better YUV->RGB conversion control Rewrite control of the colorspace and input/output level parameters used in YUV-RGB conversions, replacing VO-specific suboptions with new common options and adding configuration support to more cases. Add new option --colormatrix which selects the colorspace the original video is assumed to have in YUV->RGB conversions. The default behavior changes from assuming BT.601 to colorspace autoselection between BT.601 and BT.709 using a simple heuristic based on video size. Add new options --colormatrix-input-range and --colormatrix-output-range which select input YUV and output RGB range. Disable the previously existing VO-specific colorspace and level conversion suboptions in vo_gl and vo_vdpau. Remove the "yuv_colorspace" property and replace it with one named "colormatrix" and semantics matching the new option. Add new properties matching the options for level conversion. Colorspace selection is currently supported by vo_gl, vo_vdpau, vo_xv and vf_scale, and all can change it at runtime (previously only vo_vdpau and vo_xv could). vo_vdpau now uses the same conversion matrix generation as vo_gl instead of libvdpau functionality; the main functional difference is that the "contrast" equalizer control behaves somewhat differently (it scales the Y component around 1/2 instead of around 0, so that contrast 0 makes the image gray rather than black). vo_xv does not support level conversion. vf_scale supports range setting for input, but always outputs full-range RGB. The value of the slave properties is the policy setting used for conversions. This means they can be set to any value regardless of whether the current VO supports that value or whether there currently even is any video. Possibly separate properties could be added to query the conversion actually used at the moment, if any. Because the colorspace and level settings are now set with a single VF/VO control call, the return value of that is no longer used to signal whether all the settings are actually supported. Instead code should set all the details it can support, and ignore the rest. The core will use GET_YUV_COLORSPACE to check which colorspace details have been set and which not. In other words, the return value for SET_YUV_COLORSPACE only signals whether any kind of YUV colorspace conversion handling exists at all, and VOs have to take care to return the actual state with GET_YUV_COLORSPACE instead. To be changed in later commits: add missing option documentation.
2011-10-15 21:50:21 +00:00
char * const mp_csp_names[MP_CSP_COUNT] = {
"Autoselect",
"BT.601 (SD)",
"BT.709 (HD)",
"SMPTE-240M",
"RGB",
video, options: implement better YUV->RGB conversion control Rewrite control of the colorspace and input/output level parameters used in YUV-RGB conversions, replacing VO-specific suboptions with new common options and adding configuration support to more cases. Add new option --colormatrix which selects the colorspace the original video is assumed to have in YUV->RGB conversions. The default behavior changes from assuming BT.601 to colorspace autoselection between BT.601 and BT.709 using a simple heuristic based on video size. Add new options --colormatrix-input-range and --colormatrix-output-range which select input YUV and output RGB range. Disable the previously existing VO-specific colorspace and level conversion suboptions in vo_gl and vo_vdpau. Remove the "yuv_colorspace" property and replace it with one named "colormatrix" and semantics matching the new option. Add new properties matching the options for level conversion. Colorspace selection is currently supported by vo_gl, vo_vdpau, vo_xv and vf_scale, and all can change it at runtime (previously only vo_vdpau and vo_xv could). vo_vdpau now uses the same conversion matrix generation as vo_gl instead of libvdpau functionality; the main functional difference is that the "contrast" equalizer control behaves somewhat differently (it scales the Y component around 1/2 instead of around 0, so that contrast 0 makes the image gray rather than black). vo_xv does not support level conversion. vf_scale supports range setting for input, but always outputs full-range RGB. The value of the slave properties is the policy setting used for conversions. This means they can be set to any value regardless of whether the current VO supports that value or whether there currently even is any video. Possibly separate properties could be added to query the conversion actually used at the moment, if any. Because the colorspace and level settings are now set with a single VF/VO control call, the return value of that is no longer used to signal whether all the settings are actually supported. Instead code should set all the details it can support, and ignore the rest. The core will use GET_YUV_COLORSPACE to check which colorspace details have been set and which not. In other words, the return value for SET_YUV_COLORSPACE only signals whether any kind of YUV colorspace conversion handling exists at all, and VOs have to take care to return the actual state with GET_YUV_COLORSPACE instead. To be changed in later commits: add missing option documentation.
2011-10-15 21:50:21 +00:00
};
char * const mp_csp_equalizer_names[MP_CSP_EQ_COUNT] = {
"brightness",
"contrast",
"hue",
"saturation",
"gamma",
};
enum mp_csp avcol_spc_to_mp_csp(enum AVColorSpace colorspace)
{
switch (colorspace) {
case AVCOL_SPC_BT709: return MP_CSP_BT_709;
case AVCOL_SPC_BT470BG: return MP_CSP_BT_601;
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;
default: return MP_CSP_AUTO;
}
}
enum mp_csp_levels avcol_range_to_mp_csp_levels(enum AVColorRange range)
{
switch (range) {
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 AVColorSpace 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_SMPTE_240M: return AVCOL_SPC_SMPTE240M;
case MP_CSP_RGB: return AVCOL_SPC_RGB;
default: return AVCOL_SPC_UNSPECIFIED;
}
}
enum AVColorRange 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;
}
}
video, options: implement better YUV->RGB conversion control Rewrite control of the colorspace and input/output level parameters used in YUV-RGB conversions, replacing VO-specific suboptions with new common options and adding configuration support to more cases. Add new option --colormatrix which selects the colorspace the original video is assumed to have in YUV->RGB conversions. The default behavior changes from assuming BT.601 to colorspace autoselection between BT.601 and BT.709 using a simple heuristic based on video size. Add new options --colormatrix-input-range and --colormatrix-output-range which select input YUV and output RGB range. Disable the previously existing VO-specific colorspace and level conversion suboptions in vo_gl and vo_vdpau. Remove the "yuv_colorspace" property and replace it with one named "colormatrix" and semantics matching the new option. Add new properties matching the options for level conversion. Colorspace selection is currently supported by vo_gl, vo_vdpau, vo_xv and vf_scale, and all can change it at runtime (previously only vo_vdpau and vo_xv could). vo_vdpau now uses the same conversion matrix generation as vo_gl instead of libvdpau functionality; the main functional difference is that the "contrast" equalizer control behaves somewhat differently (it scales the Y component around 1/2 instead of around 0, so that contrast 0 makes the image gray rather than black). vo_xv does not support level conversion. vf_scale supports range setting for input, but always outputs full-range RGB. The value of the slave properties is the policy setting used for conversions. This means they can be set to any value regardless of whether the current VO supports that value or whether there currently even is any video. Possibly separate properties could be added to query the conversion actually used at the moment, if any. Because the colorspace and level settings are now set with a single VF/VO control call, the return value of that is no longer used to signal whether all the settings are actually supported. Instead code should set all the details it can support, and ignore the rest. The core will use GET_YUV_COLORSPACE to check which colorspace details have been set and which not. In other words, the return value for SET_YUV_COLORSPACE only signals whether any kind of YUV colorspace conversion handling exists at all, and VOs have to take care to return the actual state with GET_YUV_COLORSPACE instead. To be changed in later commits: add missing option documentation.
2011-10-15 21:50:21 +00:00
enum mp_csp mp_csp_guess_colorspace(int width, int height)
{
return width >= 1280 || height > 576 ? MP_CSP_BT_709 : MP_CSP_BT_601;
}
/**
* \brief little helper function to create a lookup table for gamma
* \param map buffer to create map into
* \param size size of buffer
* \param gamma gamma value
*/
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void mp_gen_gamma_map(uint8_t *map, int size, float gamma)
{
if (gamma == 1.0) {
for (int i = 0; i < size; i++)
map[i] = 255 * i / (size - 1);
return;
}
gamma = 1.0 / gamma;
for (int i = 0; i < size; i++) {
float tmp = (float)i / (size - 1.0);
tmp = pow(tmp, gamma);
if (tmp > 1.0)
tmp = 1.0;
if (tmp < 0.0)
tmp = 0.0;
map[i] = 255 * tmp;
}
}
csputils/vo_gl: rewrite YUV->RGB matrix generation Rewrite the csputils.c code generating a conversion matrix for YUV->RGB conversions (currently used by vo_gl only). Functional differences: - The separate "mplayer default" colorspace is removed, and BT.601 is used instead (the default colorspace was in fact BT.601; see below). - The old code was missing chroma scaling. As a result the "mplayer default" colorspace actually mapped to BT.601, and everything else was buggy (I guess the other colorspaces were added with particular coefficient semantics, without understanding that the original "default colorspace" was actually BT.601 and why its coefficients differed from the added version). - The old code had a bug in the equalizer hue equations. - The old code assumed that for specifying whether input and output were limited-range or full-range YUV or RGB it would make sense to specify "no conversion" meaning full-range YUV to full-range RGB or limited-range YUV to limited-range RGB. This isn't true; limited- range YUV has different ranges for luma and chroma (16-235 vs 16-240) which means you have to scale chroma for limited->limited conversions. The new code assumes limited->limited conversions for the levelconv parameter 2. It'd probably make sense to change the API later to specify the ranges of input and output separately. - The undocumented EBU and XYZ colorspaces are removed. I doubt any videos use these. Also the EBU colorspace looks like it'd expect a different input range - at least no input would map to full RGB red as it was.
2011-08-29 02:38:44 +00:00
/* Fill in the Y, U, V vectors of a yuv2rgb 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(float m[3][4], float lr, float lg, float lb)
{
assert(fabs(lr+lg+lb - 1) < 1e-6);
m[0][0] = m[1][0] = m[2][0] = 1;
m[0][1] = 0;
m[1][1] = -2 * (1-lb) * lb/lg;
m[2][1] = 2 * (1-lb);
m[0][2] = 2 * (1-lr);
m[1][2] = -2 * (1-lr) * lr/lg;
m[2][2] = 0;
// Constant coefficients (m[x][3]) not set here
}
/**
* \brief get the coefficients of the yuv -> rgb conversion matrix
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* \param params struct specifying the properties of the conversion like
* brightness, ...
csputils/vo_gl: rewrite YUV->RGB matrix generation Rewrite the csputils.c code generating a conversion matrix for YUV->RGB conversions (currently used by vo_gl only). Functional differences: - The separate "mplayer default" colorspace is removed, and BT.601 is used instead (the default colorspace was in fact BT.601; see below). - The old code was missing chroma scaling. As a result the "mplayer default" colorspace actually mapped to BT.601, and everything else was buggy (I guess the other colorspaces were added with particular coefficient semantics, without understanding that the original "default colorspace" was actually BT.601 and why its coefficients differed from the added version). - The old code had a bug in the equalizer hue equations. - The old code assumed that for specifying whether input and output were limited-range or full-range YUV or RGB it would make sense to specify "no conversion" meaning full-range YUV to full-range RGB or limited-range YUV to limited-range RGB. This isn't true; limited- range YUV has different ranges for luma and chroma (16-235 vs 16-240) which means you have to scale chroma for limited->limited conversions. The new code assumes limited->limited conversions for the levelconv parameter 2. It'd probably make sense to change the API later to specify the ranges of input and output separately. - The undocumented EBU and XYZ colorspaces are removed. I doubt any videos use these. Also the EBU colorspace looks like it'd expect a different input range - at least no input would map to full RGB red as it was.
2011-08-29 02:38:44 +00:00
* \param m array to store coefficients into
*/
csputils/vo_gl: rewrite YUV->RGB matrix generation Rewrite the csputils.c code generating a conversion matrix for YUV->RGB conversions (currently used by vo_gl only). Functional differences: - The separate "mplayer default" colorspace is removed, and BT.601 is used instead (the default colorspace was in fact BT.601; see below). - The old code was missing chroma scaling. As a result the "mplayer default" colorspace actually mapped to BT.601, and everything else was buggy (I guess the other colorspaces were added with particular coefficient semantics, without understanding that the original "default colorspace" was actually BT.601 and why its coefficients differed from the added version). - The old code had a bug in the equalizer hue equations. - The old code assumed that for specifying whether input and output were limited-range or full-range YUV or RGB it would make sense to specify "no conversion" meaning full-range YUV to full-range RGB or limited-range YUV to limited-range RGB. This isn't true; limited- range YUV has different ranges for luma and chroma (16-235 vs 16-240) which means you have to scale chroma for limited->limited conversions. The new code assumes limited->limited conversions for the levelconv parameter 2. It'd probably make sense to change the API later to specify the ranges of input and output separately. - The undocumented EBU and XYZ colorspaces are removed. I doubt any videos use these. Also the EBU colorspace looks like it'd expect a different input range - at least no input would map to full RGB red as it was.
2011-08-29 02:38:44 +00:00
void mp_get_yuv2rgb_coeffs(struct mp_csp_params *params, float m[3][4])
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{
video, options: implement better YUV->RGB conversion control Rewrite control of the colorspace and input/output level parameters used in YUV-RGB conversions, replacing VO-specific suboptions with new common options and adding configuration support to more cases. Add new option --colormatrix which selects the colorspace the original video is assumed to have in YUV->RGB conversions. The default behavior changes from assuming BT.601 to colorspace autoselection between BT.601 and BT.709 using a simple heuristic based on video size. Add new options --colormatrix-input-range and --colormatrix-output-range which select input YUV and output RGB range. Disable the previously existing VO-specific colorspace and level conversion suboptions in vo_gl and vo_vdpau. Remove the "yuv_colorspace" property and replace it with one named "colormatrix" and semantics matching the new option. Add new properties matching the options for level conversion. Colorspace selection is currently supported by vo_gl, vo_vdpau, vo_xv and vf_scale, and all can change it at runtime (previously only vo_vdpau and vo_xv could). vo_vdpau now uses the same conversion matrix generation as vo_gl instead of libvdpau functionality; the main functional difference is that the "contrast" equalizer control behaves somewhat differently (it scales the Y component around 1/2 instead of around 0, so that contrast 0 makes the image gray rather than black). vo_xv does not support level conversion. vf_scale supports range setting for input, but always outputs full-range RGB. The value of the slave properties is the policy setting used for conversions. This means they can be set to any value regardless of whether the current VO supports that value or whether there currently even is any video. Possibly separate properties could be added to query the conversion actually used at the moment, if any. Because the colorspace and level settings are now set with a single VF/VO control call, the return value of that is no longer used to signal whether all the settings are actually supported. Instead code should set all the details it can support, and ignore the rest. The core will use GET_YUV_COLORSPACE to check which colorspace details have been set and which not. In other words, the return value for SET_YUV_COLORSPACE only signals whether any kind of YUV colorspace conversion handling exists at all, and VOs have to take care to return the actual state with GET_YUV_COLORSPACE instead. To be changed in later commits: add missing option documentation.
2011-10-15 21:50:21 +00:00
int format = params->colorspace.format;
if (format <= MP_CSP_AUTO || format >= MP_CSP_COUNT)
csputils/vo_gl: rewrite YUV->RGB matrix generation Rewrite the csputils.c code generating a conversion matrix for YUV->RGB conversions (currently used by vo_gl only). Functional differences: - The separate "mplayer default" colorspace is removed, and BT.601 is used instead (the default colorspace was in fact BT.601; see below). - The old code was missing chroma scaling. As a result the "mplayer default" colorspace actually mapped to BT.601, and everything else was buggy (I guess the other colorspaces were added with particular coefficient semantics, without understanding that the original "default colorspace" was actually BT.601 and why its coefficients differed from the added version). - The old code had a bug in the equalizer hue equations. - The old code assumed that for specifying whether input and output were limited-range or full-range YUV or RGB it would make sense to specify "no conversion" meaning full-range YUV to full-range RGB or limited-range YUV to limited-range RGB. This isn't true; limited- range YUV has different ranges for luma and chroma (16-235 vs 16-240) which means you have to scale chroma for limited->limited conversions. The new code assumes limited->limited conversions for the levelconv parameter 2. It'd probably make sense to change the API later to specify the ranges of input and output separately. - The undocumented EBU and XYZ colorspaces are removed. I doubt any videos use these. Also the EBU colorspace looks like it'd expect a different input range - at least no input would map to full RGB red as it was.
2011-08-29 02:38:44 +00:00
format = MP_CSP_BT_601;
switch (format) {
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;
default:
abort();
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};
csputils/vo_gl: rewrite YUV->RGB matrix generation Rewrite the csputils.c code generating a conversion matrix for YUV->RGB conversions (currently used by vo_gl only). Functional differences: - The separate "mplayer default" colorspace is removed, and BT.601 is used instead (the default colorspace was in fact BT.601; see below). - The old code was missing chroma scaling. As a result the "mplayer default" colorspace actually mapped to BT.601, and everything else was buggy (I guess the other colorspaces were added with particular coefficient semantics, without understanding that the original "default colorspace" was actually BT.601 and why its coefficients differed from the added version). - The old code had a bug in the equalizer hue equations. - The old code assumed that for specifying whether input and output were limited-range or full-range YUV or RGB it would make sense to specify "no conversion" meaning full-range YUV to full-range RGB or limited-range YUV to limited-range RGB. This isn't true; limited- range YUV has different ranges for luma and chroma (16-235 vs 16-240) which means you have to scale chroma for limited->limited conversions. The new code assumes limited->limited conversions for the levelconv parameter 2. It'd probably make sense to change the API later to specify the ranges of input and output separately. - The undocumented EBU and XYZ colorspaces are removed. I doubt any videos use these. Also the EBU colorspace looks like it'd expect a different input range - at least no input would map to full RGB red as it was.
2011-08-29 02:38:44 +00:00
// Hue is equivalent to rotating input [U, V] subvector around the origin.
// Saturation scales [U, V].
float huecos = params->saturation * cos(params->hue);
float huesin = params->saturation * sin(params->hue);
for (int i = 0; i < 3; i++) {
float u = m[i][COL_U];
m[i][COL_U] = huecos * u - huesin * m[i][COL_V];
m[i][COL_V] = huesin * u + huecos * m[i][COL_V];
}
video, options: implement better YUV->RGB conversion control Rewrite control of the colorspace and input/output level parameters used in YUV-RGB conversions, replacing VO-specific suboptions with new common options and adding configuration support to more cases. Add new option --colormatrix which selects the colorspace the original video is assumed to have in YUV->RGB conversions. The default behavior changes from assuming BT.601 to colorspace autoselection between BT.601 and BT.709 using a simple heuristic based on video size. Add new options --colormatrix-input-range and --colormatrix-output-range which select input YUV and output RGB range. Disable the previously existing VO-specific colorspace and level conversion suboptions in vo_gl and vo_vdpau. Remove the "yuv_colorspace" property and replace it with one named "colormatrix" and semantics matching the new option. Add new properties matching the options for level conversion. Colorspace selection is currently supported by vo_gl, vo_vdpau, vo_xv and vf_scale, and all can change it at runtime (previously only vo_vdpau and vo_xv could). vo_vdpau now uses the same conversion matrix generation as vo_gl instead of libvdpau functionality; the main functional difference is that the "contrast" equalizer control behaves somewhat differently (it scales the Y component around 1/2 instead of around 0, so that contrast 0 makes the image gray rather than black). vo_xv does not support level conversion. vf_scale supports range setting for input, but always outputs full-range RGB. The value of the slave properties is the policy setting used for conversions. This means they can be set to any value regardless of whether the current VO supports that value or whether there currently even is any video. Possibly separate properties could be added to query the conversion actually used at the moment, if any. Because the colorspace and level settings are now set with a single VF/VO control call, the return value of that is no longer used to signal whether all the settings are actually supported. Instead code should set all the details it can support, and ignore the rest. The core will use GET_YUV_COLORSPACE to check which colorspace details have been set and which not. In other words, the return value for SET_YUV_COLORSPACE only signals whether any kind of YUV colorspace conversion handling exists at all, and VOs have to take care to return the actual state with GET_YUV_COLORSPACE instead. To be changed in later commits: add missing option documentation.
2011-10-15 21:50:21 +00:00
int levels_in = params->colorspace.levels_in;
if (levels_in <= MP_CSP_LEVELS_AUTO || levels_in >= MP_CSP_LEVELS_COUNT)
levels_in = MP_CSP_LEVELS_TV;
assert(params->input_bits >= 8);
assert(params->texture_bits >= params->input_bits);
double s = (1 << params->input_bits-8) / ((1<<params->texture_bits)-1.);
csputils/vo_gl: rewrite YUV->RGB matrix generation Rewrite the csputils.c code generating a conversion matrix for YUV->RGB conversions (currently used by vo_gl only). Functional differences: - The separate "mplayer default" colorspace is removed, and BT.601 is used instead (the default colorspace was in fact BT.601; see below). - The old code was missing chroma scaling. As a result the "mplayer default" colorspace actually mapped to BT.601, and everything else was buggy (I guess the other colorspaces were added with particular coefficient semantics, without understanding that the original "default colorspace" was actually BT.601 and why its coefficients differed from the added version). - The old code had a bug in the equalizer hue equations. - The old code assumed that for specifying whether input and output were limited-range or full-range YUV or RGB it would make sense to specify "no conversion" meaning full-range YUV to full-range RGB or limited-range YUV to limited-range RGB. This isn't true; limited- range YUV has different ranges for luma and chroma (16-235 vs 16-240) which means you have to scale chroma for limited->limited conversions. The new code assumes limited->limited conversions for the levelconv parameter 2. It'd probably make sense to change the API later to specify the ranges of input and output separately. - The undocumented EBU and XYZ colorspaces are removed. I doubt any videos use these. Also the EBU colorspace looks like it'd expect a different input range - at least no input would map to full RGB red as it was.
2011-08-29 02:38:44 +00:00
// The values below are written in 0-255 scale
struct yuvlevels { double ymin, ymax, cmin, cmid; }
yuvlim = { 16*s, 235*s, 16*s, 128*s },
yuvfull = { 0*s, 255*s, 1*s, 128*s }, // '1' for symmetry around 128
csputils/vo_gl: rewrite YUV->RGB matrix generation Rewrite the csputils.c code generating a conversion matrix for YUV->RGB conversions (currently used by vo_gl only). Functional differences: - The separate "mplayer default" colorspace is removed, and BT.601 is used instead (the default colorspace was in fact BT.601; see below). - The old code was missing chroma scaling. As a result the "mplayer default" colorspace actually mapped to BT.601, and everything else was buggy (I guess the other colorspaces were added with particular coefficient semantics, without understanding that the original "default colorspace" was actually BT.601 and why its coefficients differed from the added version). - The old code had a bug in the equalizer hue equations. - The old code assumed that for specifying whether input and output were limited-range or full-range YUV or RGB it would make sense to specify "no conversion" meaning full-range YUV to full-range RGB or limited-range YUV to limited-range RGB. This isn't true; limited- range YUV has different ranges for luma and chroma (16-235 vs 16-240) which means you have to scale chroma for limited->limited conversions. The new code assumes limited->limited conversions for the levelconv parameter 2. It'd probably make sense to change the API later to specify the ranges of input and output separately. - The undocumented EBU and XYZ colorspaces are removed. I doubt any videos use these. Also the EBU colorspace looks like it'd expect a different input range - at least no input would map to full RGB red as it was.
2011-08-29 02:38:44 +00:00
yuvlev;
video, options: implement better YUV->RGB conversion control Rewrite control of the colorspace and input/output level parameters used in YUV-RGB conversions, replacing VO-specific suboptions with new common options and adding configuration support to more cases. Add new option --colormatrix which selects the colorspace the original video is assumed to have in YUV->RGB conversions. The default behavior changes from assuming BT.601 to colorspace autoselection between BT.601 and BT.709 using a simple heuristic based on video size. Add new options --colormatrix-input-range and --colormatrix-output-range which select input YUV and output RGB range. Disable the previously existing VO-specific colorspace and level conversion suboptions in vo_gl and vo_vdpau. Remove the "yuv_colorspace" property and replace it with one named "colormatrix" and semantics matching the new option. Add new properties matching the options for level conversion. Colorspace selection is currently supported by vo_gl, vo_vdpau, vo_xv and vf_scale, and all can change it at runtime (previously only vo_vdpau and vo_xv could). vo_vdpau now uses the same conversion matrix generation as vo_gl instead of libvdpau functionality; the main functional difference is that the "contrast" equalizer control behaves somewhat differently (it scales the Y component around 1/2 instead of around 0, so that contrast 0 makes the image gray rather than black). vo_xv does not support level conversion. vf_scale supports range setting for input, but always outputs full-range RGB. The value of the slave properties is the policy setting used for conversions. This means they can be set to any value regardless of whether the current VO supports that value or whether there currently even is any video. Possibly separate properties could be added to query the conversion actually used at the moment, if any. Because the colorspace and level settings are now set with a single VF/VO control call, the return value of that is no longer used to signal whether all the settings are actually supported. Instead code should set all the details it can support, and ignore the rest. The core will use GET_YUV_COLORSPACE to check which colorspace details have been set and which not. In other words, the return value for SET_YUV_COLORSPACE only signals whether any kind of YUV colorspace conversion handling exists at all, and VOs have to take care to return the actual state with GET_YUV_COLORSPACE instead. To be changed in later commits: add missing option documentation.
2011-10-15 21:50:21 +00:00
switch (levels_in) {
case MP_CSP_LEVELS_TV: yuvlev = yuvlim; break;
case MP_CSP_LEVELS_PC: yuvlev = yuvfull; break;
default:
abort();
}
int levels_out = params->colorspace.levels_out;
if (levels_out <= MP_CSP_LEVELS_AUTO || levels_out >= MP_CSP_LEVELS_COUNT)
levels_out = MP_CSP_LEVELS_PC;
csputils/vo_gl: rewrite YUV->RGB matrix generation Rewrite the csputils.c code generating a conversion matrix for YUV->RGB conversions (currently used by vo_gl only). Functional differences: - The separate "mplayer default" colorspace is removed, and BT.601 is used instead (the default colorspace was in fact BT.601; see below). - The old code was missing chroma scaling. As a result the "mplayer default" colorspace actually mapped to BT.601, and everything else was buggy (I guess the other colorspaces were added with particular coefficient semantics, without understanding that the original "default colorspace" was actually BT.601 and why its coefficients differed from the added version). - The old code had a bug in the equalizer hue equations. - The old code assumed that for specifying whether input and output were limited-range or full-range YUV or RGB it would make sense to specify "no conversion" meaning full-range YUV to full-range RGB or limited-range YUV to limited-range RGB. This isn't true; limited- range YUV has different ranges for luma and chroma (16-235 vs 16-240) which means you have to scale chroma for limited->limited conversions. The new code assumes limited->limited conversions for the levelconv parameter 2. It'd probably make sense to change the API later to specify the ranges of input and output separately. - The undocumented EBU and XYZ colorspaces are removed. I doubt any videos use these. Also the EBU colorspace looks like it'd expect a different input range - at least no input would map to full RGB red as it was.
2011-08-29 02:38:44 +00:00
struct rgblevels { double min, max; }
rgblim = { 16/255., 235/255. },
rgbfull = { 0, 1 },
csputils/vo_gl: rewrite YUV->RGB matrix generation Rewrite the csputils.c code generating a conversion matrix for YUV->RGB conversions (currently used by vo_gl only). Functional differences: - The separate "mplayer default" colorspace is removed, and BT.601 is used instead (the default colorspace was in fact BT.601; see below). - The old code was missing chroma scaling. As a result the "mplayer default" colorspace actually mapped to BT.601, and everything else was buggy (I guess the other colorspaces were added with particular coefficient semantics, without understanding that the original "default colorspace" was actually BT.601 and why its coefficients differed from the added version). - The old code had a bug in the equalizer hue equations. - The old code assumed that for specifying whether input and output were limited-range or full-range YUV or RGB it would make sense to specify "no conversion" meaning full-range YUV to full-range RGB or limited-range YUV to limited-range RGB. This isn't true; limited- range YUV has different ranges for luma and chroma (16-235 vs 16-240) which means you have to scale chroma for limited->limited conversions. The new code assumes limited->limited conversions for the levelconv parameter 2. It'd probably make sense to change the API later to specify the ranges of input and output separately. - The undocumented EBU and XYZ colorspaces are removed. I doubt any videos use these. Also the EBU colorspace looks like it'd expect a different input range - at least no input would map to full RGB red as it was.
2011-08-29 02:38:44 +00:00
rgblev;
video, options: implement better YUV->RGB conversion control Rewrite control of the colorspace and input/output level parameters used in YUV-RGB conversions, replacing VO-specific suboptions with new common options and adding configuration support to more cases. Add new option --colormatrix which selects the colorspace the original video is assumed to have in YUV->RGB conversions. The default behavior changes from assuming BT.601 to colorspace autoselection between BT.601 and BT.709 using a simple heuristic based on video size. Add new options --colormatrix-input-range and --colormatrix-output-range which select input YUV and output RGB range. Disable the previously existing VO-specific colorspace and level conversion suboptions in vo_gl and vo_vdpau. Remove the "yuv_colorspace" property and replace it with one named "colormatrix" and semantics matching the new option. Add new properties matching the options for level conversion. Colorspace selection is currently supported by vo_gl, vo_vdpau, vo_xv and vf_scale, and all can change it at runtime (previously only vo_vdpau and vo_xv could). vo_vdpau now uses the same conversion matrix generation as vo_gl instead of libvdpau functionality; the main functional difference is that the "contrast" equalizer control behaves somewhat differently (it scales the Y component around 1/2 instead of around 0, so that contrast 0 makes the image gray rather than black). vo_xv does not support level conversion. vf_scale supports range setting for input, but always outputs full-range RGB. The value of the slave properties is the policy setting used for conversions. This means they can be set to any value regardless of whether the current VO supports that value or whether there currently even is any video. Possibly separate properties could be added to query the conversion actually used at the moment, if any. Because the colorspace and level settings are now set with a single VF/VO control call, the return value of that is no longer used to signal whether all the settings are actually supported. Instead code should set all the details it can support, and ignore the rest. The core will use GET_YUV_COLORSPACE to check which colorspace details have been set and which not. In other words, the return value for SET_YUV_COLORSPACE only signals whether any kind of YUV colorspace conversion handling exists at all, and VOs have to take care to return the actual state with GET_YUV_COLORSPACE instead. To be changed in later commits: add missing option documentation.
2011-10-15 21:50:21 +00:00
switch (levels_out) {
case MP_CSP_LEVELS_TV: rgblev = rgblim; break;
case MP_CSP_LEVELS_PC: rgblev = rgbfull; break;
csputils/vo_gl: rewrite YUV->RGB matrix generation Rewrite the csputils.c code generating a conversion matrix for YUV->RGB conversions (currently used by vo_gl only). Functional differences: - The separate "mplayer default" colorspace is removed, and BT.601 is used instead (the default colorspace was in fact BT.601; see below). - The old code was missing chroma scaling. As a result the "mplayer default" colorspace actually mapped to BT.601, and everything else was buggy (I guess the other colorspaces were added with particular coefficient semantics, without understanding that the original "default colorspace" was actually BT.601 and why its coefficients differed from the added version). - The old code had a bug in the equalizer hue equations. - The old code assumed that for specifying whether input and output were limited-range or full-range YUV or RGB it would make sense to specify "no conversion" meaning full-range YUV to full-range RGB or limited-range YUV to limited-range RGB. This isn't true; limited- range YUV has different ranges for luma and chroma (16-235 vs 16-240) which means you have to scale chroma for limited->limited conversions. The new code assumes limited->limited conversions for the levelconv parameter 2. It'd probably make sense to change the API later to specify the ranges of input and output separately. - The undocumented EBU and XYZ colorspaces are removed. I doubt any videos use these. Also the EBU colorspace looks like it'd expect a different input range - at least no input would map to full RGB red as it was.
2011-08-29 02:38:44 +00:00
default:
abort();
}
video, options: implement better YUV->RGB conversion control Rewrite control of the colorspace and input/output level parameters used in YUV-RGB conversions, replacing VO-specific suboptions with new common options and adding configuration support to more cases. Add new option --colormatrix which selects the colorspace the original video is assumed to have in YUV->RGB conversions. The default behavior changes from assuming BT.601 to colorspace autoselection between BT.601 and BT.709 using a simple heuristic based on video size. Add new options --colormatrix-input-range and --colormatrix-output-range which select input YUV and output RGB range. Disable the previously existing VO-specific colorspace and level conversion suboptions in vo_gl and vo_vdpau. Remove the "yuv_colorspace" property and replace it with one named "colormatrix" and semantics matching the new option. Add new properties matching the options for level conversion. Colorspace selection is currently supported by vo_gl, vo_vdpau, vo_xv and vf_scale, and all can change it at runtime (previously only vo_vdpau and vo_xv could). vo_vdpau now uses the same conversion matrix generation as vo_gl instead of libvdpau functionality; the main functional difference is that the "contrast" equalizer control behaves somewhat differently (it scales the Y component around 1/2 instead of around 0, so that contrast 0 makes the image gray rather than black). vo_xv does not support level conversion. vf_scale supports range setting for input, but always outputs full-range RGB. The value of the slave properties is the policy setting used for conversions. This means they can be set to any value regardless of whether the current VO supports that value or whether there currently even is any video. Possibly separate properties could be added to query the conversion actually used at the moment, if any. Because the colorspace and level settings are now set with a single VF/VO control call, the return value of that is no longer used to signal whether all the settings are actually supported. Instead code should set all the details it can support, and ignore the rest. The core will use GET_YUV_COLORSPACE to check which colorspace details have been set and which not. In other words, the return value for SET_YUV_COLORSPACE only signals whether any kind of YUV colorspace conversion handling exists at all, and VOs have to take care to return the actual state with GET_YUV_COLORSPACE instead. To be changed in later commits: add missing option documentation.
2011-10-15 21:50:21 +00:00
csputils/vo_gl: rewrite YUV->RGB matrix generation Rewrite the csputils.c code generating a conversion matrix for YUV->RGB conversions (currently used by vo_gl only). Functional differences: - The separate "mplayer default" colorspace is removed, and BT.601 is used instead (the default colorspace was in fact BT.601; see below). - The old code was missing chroma scaling. As a result the "mplayer default" colorspace actually mapped to BT.601, and everything else was buggy (I guess the other colorspaces were added with particular coefficient semantics, without understanding that the original "default colorspace" was actually BT.601 and why its coefficients differed from the added version). - The old code had a bug in the equalizer hue equations. - The old code assumed that for specifying whether input and output were limited-range or full-range YUV or RGB it would make sense to specify "no conversion" meaning full-range YUV to full-range RGB or limited-range YUV to limited-range RGB. This isn't true; limited- range YUV has different ranges for luma and chroma (16-235 vs 16-240) which means you have to scale chroma for limited->limited conversions. The new code assumes limited->limited conversions for the levelconv parameter 2. It'd probably make sense to change the API later to specify the ranges of input and output separately. - The undocumented EBU and XYZ colorspaces are removed. I doubt any videos use these. Also the EBU colorspace looks like it'd expect a different input range - at least no input would map to full RGB red as it was.
2011-08-29 02:38:44 +00:00
double ymul = (rgblev.max - rgblev.min) / (yuvlev.ymax - yuvlev.ymin);
double cmul = (rgblev.max - rgblev.min) / (yuvlev.cmid - yuvlev.cmin) / 2;
for (int i = 0; i < 3; i++) {
m[i][COL_Y] *= ymul;
m[i][COL_U] *= cmul;
m[i][COL_V] *= cmul;
// Set COL_C so that Y=umin,UV=cmid maps to RGB=min (black to black)
m[i][COL_C] = rgblev.min - m[i][COL_Y] * yuvlev.ymin
-(m[i][COL_U] + m[i][COL_V]) * yuvlev.cmid;
csputils/vo_gl: rewrite YUV->RGB matrix generation Rewrite the csputils.c code generating a conversion matrix for YUV->RGB conversions (currently used by vo_gl only). Functional differences: - The separate "mplayer default" colorspace is removed, and BT.601 is used instead (the default colorspace was in fact BT.601; see below). - The old code was missing chroma scaling. As a result the "mplayer default" colorspace actually mapped to BT.601, and everything else was buggy (I guess the other colorspaces were added with particular coefficient semantics, without understanding that the original "default colorspace" was actually BT.601 and why its coefficients differed from the added version). - The old code had a bug in the equalizer hue equations. - The old code assumed that for specifying whether input and output were limited-range or full-range YUV or RGB it would make sense to specify "no conversion" meaning full-range YUV to full-range RGB or limited-range YUV to limited-range RGB. This isn't true; limited- range YUV has different ranges for luma and chroma (16-235 vs 16-240) which means you have to scale chroma for limited->limited conversions. The new code assumes limited->limited conversions for the levelconv parameter 2. It'd probably make sense to change the API later to specify the ranges of input and output separately. - The undocumented EBU and XYZ colorspaces are removed. I doubt any videos use these. Also the EBU colorspace looks like it'd expect a different input range - at least no input would map to full RGB red as it was.
2011-08-29 02:38:44 +00:00
}
csputils/vo_gl: rewrite YUV->RGB matrix generation Rewrite the csputils.c code generating a conversion matrix for YUV->RGB conversions (currently used by vo_gl only). Functional differences: - The separate "mplayer default" colorspace is removed, and BT.601 is used instead (the default colorspace was in fact BT.601; see below). - The old code was missing chroma scaling. As a result the "mplayer default" colorspace actually mapped to BT.601, and everything else was buggy (I guess the other colorspaces were added with particular coefficient semantics, without understanding that the original "default colorspace" was actually BT.601 and why its coefficients differed from the added version). - The old code had a bug in the equalizer hue equations. - The old code assumed that for specifying whether input and output were limited-range or full-range YUV or RGB it would make sense to specify "no conversion" meaning full-range YUV to full-range RGB or limited-range YUV to limited-range RGB. This isn't true; limited- range YUV has different ranges for luma and chroma (16-235 vs 16-240) which means you have to scale chroma for limited->limited conversions. The new code assumes limited->limited conversions for the levelconv parameter 2. It'd probably make sense to change the API later to specify the ranges of input and output separately. - The undocumented EBU and XYZ colorspaces are removed. I doubt any videos use these. Also the EBU colorspace looks like it'd expect a different input range - at least no input would map to full RGB red as it was.
2011-08-29 02:38:44 +00:00
// Brightness adds a constant to output R,G,B.
// Contrast scales Y around 1/2 (not 0 in this implementation).
for (int i = 0; i < 3; i++) {
m[i][COL_C] += params->brightness;
m[i][COL_Y] *= params->contrast;
m[i][COL_C] += (rgblev.max-rgblev.min) * (1 - params->contrast)/2;
2011-08-28 02:52:46 +00:00
}
int in_bits = FFMAX(params->int_bits_in, 1);
int out_bits = FFMAX(params->int_bits_out, 1);
double in_scale = (1 << in_bits) - 1.0;
double out_scale = (1 << out_bits) - 1.0;
for (int i = 0; i < 3; i++) {
m[i][COL_C] *= out_scale; // constant is 1.0
for (int x = 0; x < 3; x++)
m[i][x] *= out_scale / in_scale;
}
}
//! size of gamma map use to avoid slow exp function in gen_yuv2rgb_map
#define GMAP_SIZE (1024)
/**
* \brief generate a 3D YUV -> RGB map
* \param params struct containing parameters like brightness, gamma, ...
* \param map where to store map. Must provide space for (size + 2)^3 elements
* \param size size of the map, excluding border
*/
2011-08-28 02:52:46 +00:00
void mp_gen_yuv2rgb_map(struct mp_csp_params *params, unsigned char *map, int size)
{
int i, j, k, l;
float step = 1.0 / size;
float y, u, v;
float yuv2rgb[3][4];
unsigned char gmaps[3][GMAP_SIZE];
mp_gen_gamma_map(gmaps[0], GMAP_SIZE, params->rgamma);
mp_gen_gamma_map(gmaps[1], GMAP_SIZE, params->ggamma);
mp_gen_gamma_map(gmaps[2], GMAP_SIZE, params->bgamma);
mp_get_yuv2rgb_coeffs(params, yuv2rgb);
for (i = 0; i < 3; i++)
for (j = 0; j < 4; j++)
yuv2rgb[i][j] *= GMAP_SIZE - 1;
v = 0;
for (i = -1; i <= size; i++) {
u = 0;
for (j = -1; j <= size; j++) {
y = 0;
for (k = -1; k <= size; k++) {
for (l = 0; l < 3; l++) {
float rgb = yuv2rgb[l][COL_Y] * y + yuv2rgb[l][COL_U] * u +
yuv2rgb[l][COL_V] * v + yuv2rgb[l][COL_C];
*map++ = gmaps[l][av_clip(rgb, 0, GMAP_SIZE - 1)];
}
y += (k == -1 || k == size - 1) ? step / 2 : step;
}
u += (j == -1 || j == size - 1) ? step / 2 : step;
}
2011-08-28 02:52:46 +00:00
v += (i == -1 || i == size - 1) ? step / 2 : step;
}
}
video, options: implement better YUV->RGB conversion control Rewrite control of the colorspace and input/output level parameters used in YUV-RGB conversions, replacing VO-specific suboptions with new common options and adding configuration support to more cases. Add new option --colormatrix which selects the colorspace the original video is assumed to have in YUV->RGB conversions. The default behavior changes from assuming BT.601 to colorspace autoselection between BT.601 and BT.709 using a simple heuristic based on video size. Add new options --colormatrix-input-range and --colormatrix-output-range which select input YUV and output RGB range. Disable the previously existing VO-specific colorspace and level conversion suboptions in vo_gl and vo_vdpau. Remove the "yuv_colorspace" property and replace it with one named "colormatrix" and semantics matching the new option. Add new properties matching the options for level conversion. Colorspace selection is currently supported by vo_gl, vo_vdpau, vo_xv and vf_scale, and all can change it at runtime (previously only vo_vdpau and vo_xv could). vo_vdpau now uses the same conversion matrix generation as vo_gl instead of libvdpau functionality; the main functional difference is that the "contrast" equalizer control behaves somewhat differently (it scales the Y component around 1/2 instead of around 0, so that contrast 0 makes the image gray rather than black). vo_xv does not support level conversion. vf_scale supports range setting for input, but always outputs full-range RGB. The value of the slave properties is the policy setting used for conversions. This means they can be set to any value regardless of whether the current VO supports that value or whether there currently even is any video. Possibly separate properties could be added to query the conversion actually used at the moment, if any. Because the colorspace and level settings are now set with a single VF/VO control call, the return value of that is no longer used to signal whether all the settings are actually supported. Instead code should set all the details it can support, and ignore the rest. The core will use GET_YUV_COLORSPACE to check which colorspace details have been set and which not. In other words, the return value for SET_YUV_COLORSPACE only signals whether any kind of YUV colorspace conversion handling exists at all, and VOs have to take care to return the actual state with GET_YUV_COLORSPACE instead. To be changed in later commits: add missing option documentation.
2011-10-15 21:50:21 +00:00
// Copy settings from eq into params.
void mp_csp_copy_equalizer_values(struct mp_csp_params *params,
const struct mp_csp_equalizer *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 * 3.1415927;
params->saturation = (eq->values[MP_CSP_EQ_SATURATION] + 100) / 100.0;
float gamma = exp(log(8.0) * eq->values[MP_CSP_EQ_GAMMA] / 100.0);
params->rgamma = gamma;
params->ggamma = gamma;
params->bgamma = gamma;
}
static int find_eq(int capabilities, const char *name)
{
for (int i = 0; i < MP_CSP_EQ_COUNT; i++) {
if (strcmp(name, mp_csp_equalizer_names[i]) == 0)
return ((1 << i) & capabilities) ? i : -1;
}
return -1;
}
int mp_csp_equalizer_get(struct mp_csp_equalizer *eq, const char *property,
int *out_value)
{
int index = find_eq(eq->capabilities, property);
if (index < 0)
return -1;
*out_value = eq->values[index];
return 0;
}
int mp_csp_equalizer_set(struct mp_csp_equalizer *eq, const char *property,
int value)
{
int index = find_eq(eq->capabilities, property);
if (index < 0)
return 0;
eq->values[index] = value;
return 1;
}
void mp_invert_yuv2rgb(float out[3][4], float in[3][4])
{
float m00 = in[0][0], m01 = in[0][1], m02 = in[0][2], m03 = in[0][3],
m10 = in[1][0], m11 = in[1][1], m12 = in[1][2], m13 = in[1][3],
m20 = in[2][0], m21 = in[2][1], m22 = in[2][2], m23 = in[2][3];
// calculate the adjoint
out[0][0] = (m11 * m22 - m21 * m12);
out[0][1] = -(m01 * m22 - m21 * m02);
out[0][2] = (m01 * m12 - m11 * m02);
out[1][0] = -(m10 * m22 - m20 * m12);
out[1][1] = (m00 * m22 - m20 * m02);
out[1][2] = -(m00 * m12 - m10 * m02);
out[2][0] = (m10 * m21 - m20 * m11);
out[2][1] = -(m00 * m21 - m20 * m01);
out[2][2] = (m00 * m11 - m10 * m01);
2012-10-24 18:20:13 +00:00
// calculate the determinant (as inverse == 1/det * adjoint,
// adjoint * m == identity * det, so this calculates the det)
float det = m00 * out[0][0] + m10 * out[0][1] + m20 * out[0][2];
det = 1.0f / det;
out[0][0] *= det;
out[0][1] *= det;
out[0][2] *= det;
out[1][0] *= det;
out[1][1] *= det;
out[1][2] *= det;
out[2][0] *= det;
out[2][1] *= det;
out[2][2] *= det;
// fix the constant coefficient
// rgb = M * yuv + C
// M^-1 * rgb = yuv + M^-1 * C
// yuv = M^-1 * rgb - M^-1 * C
// ^^^^^^^^^^
out[0][3] = -(out[0][0] * m03 + out[0][1] * m13 + out[0][2] * m23);
out[1][3] = -(out[1][0] * m03 + out[1][1] * m13 + out[1][2] * m23);
out[2][3] = -(out[2][0] * m03 + out[2][1] * m13 + out[2][2] * m23);
}
// Multiply the color in c with the given matrix.
// c is {R, G, B} or {Y, U, V} (depending on input/output and matrix).
// Output is clipped to the given number of bits.
void mp_map_int_color(float matrix[3][4], int clip_bits, int c[3])
{
int in[3] = {c[0], c[1], c[2]};
for (int i = 0; i < 3; i++) {
double val = matrix[i][3];
for (int x = 0; x < 3; x++)
val += matrix[i][x] * in[x];
int ival = lrint(val);
c[i] = av_clip(ival, 0, (1 << clip_bits) - 1);
}
}