Fix comments and color format

Replaced "color space" with "color format" in comments where color
sampling format is concerned, so to differentiate from the concept
defined in COLOR_SPACE.

Change-Id: I8c935034c166b24307a99352dab1686531276bb8

vp9/decoder/vp9_decodeframe.c

diff --git a/vp9/decoder/vp9_decodeframe.c b/vp9/decoder/vp9_decodeframe.c
index 9882940..ffc59a6 100644
--- a/vp9/decoder/vp9_decodeframe.c
+++ b/vp9/decoder/vp9_decodeframe.c
@@ -781,7 +781,7 @@
             cm->subsampling_x,
             cm->subsampling_y))
       vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,
-                         "Referenced frame has incompatible color space");
+                         "Referenced frame has incompatible color format");
   }
 
   resize_context_buffers(cm, width, height);
@@ -1324,7 +1324,7 @@
       } else {
         // NOTE: The intra-only frame header does not include the specification
         // of either the color format or color sub-sampling in profile 0. VP9
-        // specifies that the default color space should be YUV 4:2:0 in this
+        // specifies that the default color format should be YUV 4:2:0 in this
         // case (normative).
         cm->color_space = BT_601;
         cm->subsampling_y = cm->subsampling_x = 1;

vp9/encoder/vp9_encoder.c

diff --git a/vp9/encoder/vp9_encoder.c b/vp9/encoder/vp9_encoder.c
index 49fe7de..510be96 100644
--- a/vp9/encoder/vp9_encoder.c
+++ b/vp9/encoder/vp9_encoder.c
@@ -3438,13 +3438,13 @@
   if ((cm->profile == PROFILE_0 || cm->profile == PROFILE_2) &&
       (subsampling_x != 1 || subsampling_y != 1)) {
     vpx_internal_error(&cm->error, VPX_CODEC_INVALID_PARAM,
-                       "Non-4:2:0 color space requires profile 1 or 3");
+                       "Non-4:2:0 color format requires profile 1 or 3");
     res = -1;
   }
   if ((cm->profile == PROFILE_1 || cm->profile == PROFILE_3) &&
       (subsampling_x == 1 && subsampling_y == 1)) {
     vpx_internal_error(&cm->error, VPX_CODEC_INVALID_PARAM,
-                       "4:2:0 color space requires profile 0 or 2");
+                       "4:2:0 color format requires profile 0 or 2");
     res = -1;
   }
 

vp9/vp9_cx_iface.c

diff --git a/vp9/vp9_cx_iface.c b/vp9/vp9_cx_iface.c
index 7b4b178..531a03e 100644
--- a/vp9/vp9_cx_iface.c
+++ b/vp9/vp9_cx_iface.c
@@ -351,9 +351,9 @@
 }
 
 static vpx_codec_err_t set_encoder_config(
-    VP9EncoderConfig *oxcf,
-    const vpx_codec_enc_cfg_t *cfg,
-    const struct vp9_extracfg *extra_cfg) {
+  VP9EncoderConfig *oxcf,
+  const vpx_codec_enc_cfg_t *cfg,
+  const struct vp9_extracfg *extra_cfg) {
   const int is_vbr = cfg->rc_end_usage == VPX_VBR;
   oxcf->profile = cfg->g_profile;
   oxcf->max_threads = (int)cfg->g_threads;