sws: support xyz input

The implementation is heavily based on Matthias Buerchers and Nicolas Bertrands vf_xyz2rgb.c
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 9 insertions, 0 deletions

diff --git a/libswscale/swscale_internal.h b/libswscale/swscale_internal.h
index be5a80e73b..36ce1ea661 100644
--- a/libswscale/swscale_internal.h
+++ b/libswscale/swscale_internal.h
@@ -380,6 +380,8 @@ typedef struct SwsContext {
     int dstRange;                 ///< 0 = MPG YUV range, 1 = JPG YUV range (destination image).
     int src0Alpha;
     int dst0Alpha;
+    int srcXYZ;
+    int dstXYZ;
     int yuv2rgb_y_offset;
     int yuv2rgb_y_coeff;
     int yuv2rgb_v2r_coeff;
@@ -473,6 +475,13 @@ typedef struct SwsContext {
 #endif
     int use_mmx_vfilter;
 
+/* pre defined color-spaces gamma */
+#define XYZ_GAMMA (2.6f)
+#define RGB_GAMMA (2.2f)
+    int16_t xyzgamma[4096];
+    int16_t rgbgamma[4096];
+    int16_t xyz2rgb_matrix[3][4];
+
     /* function pointers for swScale() */
     yuv2planar1_fn yuv2plane1;
     yuv2planarX_fn yuv2planeX;