Adding COLOR_SPACE enum.

Change-Id: If5711eb166609cce0a88b3cb5b56b3afeebc4fb0

vp9/common/vp9_enums.h

@@ -76,4 +76,15 @@ typedef enum {
   ADST_ADST = 3                       // ADST in both directions
 } TX_TYPE;
 
+typedef enum {
+  UNKNOWN    = 0,
+  BT_601     = 1,  // YUV
+  BT_709     = 2,  // YUV
+  SMPTE_170  = 3,  // YUV
+  SMPTE_240  = 4,  // YUV
+  RESERVED_1 = 5,
+  RESERVED_2 = 6,
+  SRGB       = 7   // RGB
+} COLOR_SPACE;
+
 #endif  // VP9_COMMON_VP9_ENUMS_H_

vp9/common/vp9_onyxc_int.h

@@ -90,6 +90,8 @@ typedef struct VP9Common {
   DECLARE_ALIGNED(16, int16_t, a_dequant[QINDEX_RANGE][8]);
 #endif
 
+  COLOR_SPACE color_space;
+
   int width;
   int height;
   int display_width;

vp9/decoder/vp9_decodframe.c

@@ -898,12 +898,10 @@ static size_t read_uncompressed_header(VP9D_COMP *pbi,
   cm->error_resilient_mode = vp9_rb_read_bit(rb);
 
   if (cm->frame_type == KEY_FRAME) {
-    int csp;
-
     check_sync_code(cm, rb);
 
-    csp = vp9_rb_read_literal(rb, 3);  // colorspace
-    if (csp != 7) {  // != sRGB
+    cm->color_space = vp9_rb_read_literal(rb, 3);  // colorspace
+    if (cm->color_space != SRGB) {
       vp9_rb_read_bit(rb);  // [16,235] (including xvycc) vs [0,255] range
       if (cm->version == 1) {
         cm->subsampling_x = vp9_rb_read_bit(rb);

vp9/encoder/vp9_bitstream.c

@@ -1318,18 +1318,10 @@ static void write_uncompressed_header(VP9_COMP *cpi,
   vp9_wb_write_bit(wb, cm->error_resilient_mode);
 
   if (cm->frame_type == KEY_FRAME) {
+    const COLOR_SPACE cs = UNKNOWN;
     write_sync_code(wb);
-    // colorspaces
-    // 000 - Unknown
-    // 001 - BT.601
-    // 010 - BT.709
-    // 011 - SMPTE-170
-    // 100 - SMPTE-240
-    // 101 - Reserved
-    // 110 - Reserved
-    // 111 - sRGB (RGB)
-    vp9_wb_write_literal(wb, 0, 3);
-    if (1 /* colorspace != sRGB */) {
+    vp9_wb_write_literal(wb, cs, 3);
+    if (cs != SRGB) {
       vp9_wb_write_bit(wb, 0);  // 0: [16, 235] (i.e. xvYCC), 1: [0, 255]
       if (cm->version == 1) {
         vp9_wb_write_bit(wb, cm->subsampling_x);