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>

2 files changed, 23 insertions, 97 deletions

diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 589682f353..34333aa520 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -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
diff --git a/libavfilter/vf_colorspace.c b/libavfilter/vf_colorspace.c
index 71ea08a20f..b593215daa 100644
--- a/libavfilter/vf_colorspace.c
+++ b/libavfilter/vf_colorspace.c
@@ -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)
@@ -380,49 +346,6 @@ static int fill_gamma_table(ColorSpaceContext *s)
 }
 
 /*
- * 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];