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lavfi: make vf_colorspace use functions from colorspace.c 

These functions are shared among colorspace related filters.

Signed-off-by: Ruiling Song <ruiling.song@intel.com>
tags/n4.1
Ruiling Song Mark Thompson 7 years ago
parent
8b8b0e2cd2
commit
649d7ca477
2 changed files with 23 additions and 97 deletions
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  1. +1
    -1
      libavfilter/Makefile
  2. +22
    -96
      libavfilter/vf_colorspace.c

+ 1
- 1
libavfilter/Makefile View File

@@ -168,7 +168,7 @@ OBJS-$(CONFIG_COLORCHANNELMIXER_FILTER) += vf_colorchannelmixer.o
OBJS-$(CONFIG_COLORKEY_FILTER) += vf_colorkey.o
OBJS-$(CONFIG_COLORLEVELS_FILTER) += vf_colorlevels.o
OBJS-$(CONFIG_COLORMATRIX_FILTER) += vf_colormatrix.o
OBJS-$(CONFIG_COLORSPACE_FILTER) += vf_colorspace.o colorspacedsp.o
OBJS-$(CONFIG_COLORSPACE_FILTER) += vf_colorspace.o colorspace.o colorspacedsp.o
OBJS-$(CONFIG_CONVOLUTION_FILTER) += vf_convolution.o
OBJS-$(CONFIG_CONVOLUTION_OPENCL_FILTER) += vf_convolution_opencl.o opencl.o \
opencl/convolution.o


+ 22
- 96
libavfilter/vf_colorspace.c View File

@@ -33,6 +33,7 @@
#include "formats.h"
#include "internal.h"
#include "video.h"
#include "colorspace.h"

enum DitherMode {
DITHER_NONE,
@@ -110,21 +111,13 @@ static const enum AVColorSpace default_csp[CS_NB + 1] = {

struct ColorPrimaries {
enum Whitepoint wp;
double xr, yr, xg, yg, xb, yb;
struct PrimaryCoefficients coeff;
};

struct TransferCharacteristics {
double alpha, beta, gamma, delta;
};

struct LumaCoefficients {
double cr, cg, cb;
};

struct WhitepointCoefficients {
double xw, yw;
};

typedef struct ColorSpaceContext {
const AVClass *class;

@@ -286,57 +279,30 @@ static const struct WhitepointCoefficients whitepoint_coefficients[WP_NB] = {
};

static const struct ColorPrimaries color_primaries[AVCOL_PRI_NB] = {
[AVCOL_PRI_BT709] = { WP_D65, 0.640, 0.330, 0.300, 0.600, 0.150, 0.060 },
[AVCOL_PRI_BT470M] = { WP_C, 0.670, 0.330, 0.210, 0.710, 0.140, 0.080 },
[AVCOL_PRI_BT470BG] = { WP_D65, 0.640, 0.330, 0.290, 0.600, 0.150, 0.060,},
[AVCOL_PRI_SMPTE170M] = { WP_D65, 0.630, 0.340, 0.310, 0.595, 0.155, 0.070 },
[AVCOL_PRI_SMPTE240M] = { WP_D65, 0.630, 0.340, 0.310, 0.595, 0.155, 0.070 },
[AVCOL_PRI_SMPTE428] = { WP_E, 0.735, 0.265, 0.274, 0.718, 0.167, 0.009 },
[AVCOL_PRI_SMPTE431] = { WP_DCI, 0.680, 0.320, 0.265, 0.690, 0.150, 0.060 },
[AVCOL_PRI_SMPTE432] = { WP_D65, 0.680, 0.320, 0.265, 0.690, 0.150, 0.060 },
[AVCOL_PRI_FILM] = { WP_C, 0.681, 0.319, 0.243, 0.692, 0.145, 0.049 },
[AVCOL_PRI_BT2020] = { WP_D65, 0.708, 0.292, 0.170, 0.797, 0.131, 0.046 },
[AVCOL_PRI_JEDEC_P22] = { WP_D65, 0.630, 0.340, 0.295, 0.605, 0.155, 0.077 },
[AVCOL_PRI_BT709] = { WP_D65, { 0.640, 0.330, 0.300, 0.600, 0.150, 0.060 } },
[AVCOL_PRI_BT470M] = { WP_C, { 0.670, 0.330, 0.210, 0.710, 0.140, 0.080 } },
[AVCOL_PRI_BT470BG] = { WP_D65, { 0.640, 0.330, 0.290, 0.600, 0.150, 0.060 } },
[AVCOL_PRI_SMPTE170M] = { WP_D65, { 0.630, 0.340, 0.310, 0.595, 0.155, 0.070 } },
[AVCOL_PRI_SMPTE240M] = { WP_D65, { 0.630, 0.340, 0.310, 0.595, 0.155, 0.070 } },
[AVCOL_PRI_SMPTE428] = { WP_E, { 0.735, 0.265, 0.274, 0.718, 0.167, 0.009 } },
[AVCOL_PRI_SMPTE431] = { WP_DCI, { 0.680, 0.320, 0.265, 0.690, 0.150, 0.060 } },
[AVCOL_PRI_SMPTE432] = { WP_D65, { 0.680, 0.320, 0.265, 0.690, 0.150, 0.060 } },
[AVCOL_PRI_FILM] = { WP_C, { 0.681, 0.319, 0.243, 0.692, 0.145, 0.049 } },
[AVCOL_PRI_BT2020] = { WP_D65, { 0.708, 0.292, 0.170, 0.797, 0.131, 0.046 } },
[AVCOL_PRI_JEDEC_P22] = { WP_D65, { 0.630, 0.340, 0.295, 0.605, 0.155, 0.077 } },
};

static const struct ColorPrimaries *get_color_primaries(enum AVColorPrimaries prm)
{
const struct ColorPrimaries *coeffs;
const struct ColorPrimaries *p;

if (prm >= AVCOL_PRI_NB)
return NULL;
coeffs = &color_primaries[prm];
if (!coeffs->xr)
p = &color_primaries[prm];
if (!p->coeff.xr)
return NULL;

return coeffs;
}

static void invert_matrix3x3(const double in[3][3], double out[3][3])
{
double m00 = in[0][0], m01 = in[0][1], m02 = in[0][2],
m10 = in[1][0], m11 = in[1][1], m12 = in[1][2],
m20 = in[2][0], m21 = in[2][1], m22 = in[2][2];
int i, j;
double det;

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);

det = m00 * out[0][0] + m10 * out[0][1] + m20 * out[0][2];
det = 1.0 / det;

for (i = 0; i < 3; i++) {
for (j = 0; j < 3; j++)
out[i][j] *= det;
}
return p;
}

static int fill_gamma_table(ColorSpaceContext *s)
@@ -379,49 +345,6 @@ static int fill_gamma_table(ColorSpaceContext *s)
return 0;
}

/*
* see e.g. http://www.brucelindbloom.com/index.html?Eqn_RGB_XYZ_Matrix.html
*/
static void fill_rgb2xyz_table(const struct ColorPrimaries *coeffs,
double rgb2xyz[3][3])
{
const struct WhitepointCoefficients *wp = &whitepoint_coefficients[coeffs->wp];
double i[3][3], sr, sg, sb, zw;

rgb2xyz[0][0] = coeffs->xr / coeffs->yr;
rgb2xyz[0][1] = coeffs->xg / coeffs->yg;
rgb2xyz[0][2] = coeffs->xb / coeffs->yb;
rgb2xyz[1][0] = rgb2xyz[1][1] = rgb2xyz[1][2] = 1.0;
rgb2xyz[2][0] = (1.0 - coeffs->xr - coeffs->yr) / coeffs->yr;
rgb2xyz[2][1] = (1.0 - coeffs->xg - coeffs->yg) / coeffs->yg;
rgb2xyz[2][2] = (1.0 - coeffs->xb - coeffs->yb) / coeffs->yb;
invert_matrix3x3(rgb2xyz, i);
zw = 1.0 - wp->xw - wp->yw;
sr = i[0][0] * wp->xw + i[0][1] * wp->yw + i[0][2] * zw;
sg = i[1][0] * wp->xw + i[1][1] * wp->yw + i[1][2] * zw;
sb = i[2][0] * wp->xw + i[2][1] * wp->yw + i[2][2] * zw;
rgb2xyz[0][0] *= sr;
rgb2xyz[0][1] *= sg;
rgb2xyz[0][2] *= sb;
rgb2xyz[1][0] *= sr;
rgb2xyz[1][1] *= sg;
rgb2xyz[1][2] *= sb;
rgb2xyz[2][0] *= sr;
rgb2xyz[2][1] *= sg;
rgb2xyz[2][2] *= sb;
}

static void mul3x3(double dst[3][3], const double src1[3][3], const double src2[3][3])
{
int m, n;

for (m = 0; m < 3; m++)
for (n = 0; n < 3; n++)
dst[m][n] = src2[m][0] * src1[0][n] +
src2[m][1] * src1[1][n] +
src2[m][2] * src1[2][n];
}

/*
* See http://www.brucelindbloom.com/index.html?Eqn_ChromAdapt.html
* This function uses the Bradford mechanism.
@@ -661,10 +584,13 @@ static int create_filtergraph(AVFilterContext *ctx,
sizeof(*s->in_primaries));
if (!s->lrgb2lrgb_passthrough) {
double rgb2xyz[3][3], xyz2rgb[3][3], rgb2rgb[3][3];
const struct WhitepointCoefficients *wp_out, *wp_in;

fill_rgb2xyz_table(s->out_primaries, rgb2xyz);
wp_out = &whitepoint_coefficients[s->out_primaries->wp];
wp_in = &whitepoint_coefficients[s->in_primaries->wp];
fill_rgb2xyz_table(&s->out_primaries->coeff, wp_out, rgb2xyz);
invert_matrix3x3(rgb2xyz, xyz2rgb);
fill_rgb2xyz_table(s->in_primaries, rgb2xyz);
fill_rgb2xyz_table(&s->in_primaries->coeff, wp_in, rgb2xyz);
if (s->out_primaries->wp != s->in_primaries->wp &&
s->wp_adapt != WP_ADAPT_IDENTITY) {
double wpconv[3][3], tmp[3][3];


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