Add a new enum type vpx_color_range_t

to make meaning of color_range obvious.

Change-Id: I303582e448b82b3203b497e27b22601cc718dfff

test/vp9_encoder_parms_get_to_decoder.cc

@@ -40,17 +40,17 @@ struct EncodeParameters {
   int32_t lossless;
   int32_t error_resilient;
   int32_t frame_parallel;
-  int32_t color_range;
+  vpx_color_range_t color_range;
   vpx_color_space_t cs;
   int render_size[2];
   // TODO(JBB): quantizers / bitrate
 };
 
 const EncodeParameters kVP9EncodeParameterSet[] = {
-  {0, 0, 0, 1, 0, 0, VPX_CS_BT_601},
-  {0, 0, 0, 0, 0, 1, VPX_CS_BT_709},
-  {0, 0, 1, 0, 0, 1, VPX_CS_BT_2020},
-  {0, 2, 0, 0, 1, 0, VPX_CS_UNKNOWN, { 640, 480 }},
+  {0, 0, 0, 1, 0, VPX_CR_STUDIO_RANGE, VPX_CS_BT_601},
+  {0, 0, 0, 0, 0, VPX_CR_FULL_RANGE, VPX_CS_BT_709},
+  {0, 0, 1, 0, 0, VPX_CR_FULL_RANGE, VPX_CS_BT_2020},
+  {0, 2, 0, 0, 1, VPX_CR_STUDIO_RANGE, VPX_CS_UNKNOWN, { 640, 480 }},
   // TODO(JBB): Test profiles (requires more work).
 };
 

vp9/common/vp9_onyxc_int.h

@@ -112,7 +112,7 @@ typedef struct BufferPool {
 typedef struct VP9Common {
   struct vpx_internal_error_info  error;
   vpx_color_space_t color_space;
-  int color_range;
+  vpx_color_range_t color_range;
   int width;
   int height;
   int render_width;

vp9/decoder/vp9_decodeframe.c

@@ -1795,8 +1795,7 @@ static void read_bitdepth_colorspace_sampling(
   }
   cm->color_space = vpx_rb_read_literal(rb, 3);
   if (cm->color_space != VPX_CS_SRGB) {
-    // [16,235] (including xvycc) vs [0,255] range
-    cm->color_range = vpx_rb_read_bit(rb);
+    cm->color_range = (vpx_color_range_t)vpx_rb_read_bit(rb);
     if (cm->profile == PROFILE_1 || cm->profile == PROFILE_3) {
       cm->subsampling_x = vpx_rb_read_bit(rb);
       cm->subsampling_y = vpx_rb_read_bit(rb);
@@ -1810,7 +1809,7 @@ static void read_bitdepth_colorspace_sampling(
       cm->subsampling_y = cm->subsampling_x = 1;
     }
   } else {
-    cm->color_range = 1;
+    cm->color_range = VPX_CR_FULL_RANGE;
     if (cm->profile == PROFILE_1 || cm->profile == PROFILE_3) {
       // Note if colorspace is SRGB then 4:4:4 chroma sampling is assumed.
       // 4:2:2 or 4:4:0 chroma sampling is not allowed.
@@ -1916,7 +1915,7 @@ static size_t read_uncompressed_header(VP9Decoder *pbi,
         // specifies that the default color format should be YUV 4:2:0 in this
         // case (normative).
         cm->color_space = VPX_CS_BT_601;
-        cm->color_range = 0;
+        cm->color_range = VPX_CR_STUDIO_RANGE;
         cm->subsampling_y = cm->subsampling_x = 1;
         cm->bit_depth = VPX_BITS_8;
 #if CONFIG_VP9_HIGHBITDEPTH

vp9/encoder/vp9_encoder.h

@@ -238,7 +238,7 @@ typedef struct VP9EncoderConfig {
   int use_highbitdepth;
 #endif
   vpx_color_space_t color_space;
-  int color_range;
+  vpx_color_range_t color_range;
   int render_width;
   int render_height;
   VP9E_TEMPORAL_LAYERING_MODE temporal_layering_mode;

vp9/vp9_cx_iface.c

@@ -45,7 +45,7 @@ struct vp9_extracfg {
   vpx_bit_depth_t             bit_depth;
   vp9e_tune_content           content;
   vpx_color_space_t           color_space;
-  int                         color_range;
+  vpx_color_range_t           color_range;
   int                         render_width;
   int                         render_height;
 };
@@ -327,7 +327,8 @@ static vpx_codec_err_t validate_config(vpx_codec_alg_priv_t *ctx,
     ERROR("Codec bit-depth 8 not supported in profile > 1");
   }
   RANGE_CHECK(extra_cfg, color_space, VPX_CS_UNKNOWN, VPX_CS_SRGB);
-  RANGE_CHECK(extra_cfg, color_range, 0, 2);
+  RANGE_CHECK(extra_cfg, color_range,
+              VPX_CR_STUDIO_RANGE, VPX_CR_FULL_RANGE);
   return VPX_CODEC_OK;
 }
 

vpx/vpx_image.h

@@ -78,11 +78,17 @@ extern "C" {
     VPX_CS_SRGB       = 7   /**< sRGB */
   } vpx_color_space_t; /**< alias for enum vpx_color_space */
 
+  /*!\brief List of supported color range */
+  typedef enum vpx_color_range {
+    VPX_CR_STUDIO_RANGE = 0,    /**< Y [16..235], UV [16..240] */
+    VPX_CR_FULL_RANGE   = 1     /**< YUV/RGB [0..255] */
+  } vpx_color_range_t; /**< alias for enum vpx_color_range */
+
   /**\brief Image Descriptor */
   typedef struct vpx_image {
     vpx_img_fmt_t fmt; /**< Image Format */
     vpx_color_space_t cs; /**< Color Space */
-    int range; /**< Limited (0) vs. Full-range (1) sample data */
+    vpx_color_range_t range; /**< Color Range */
 
     /* Image storage dimensions */
     unsigned int  w;           /**< Stored image width */

vpx_scale/yv12config.h

@@ -56,7 +56,7 @@ typedef struct yv12_buffer_config {
   int subsampling_y;
   unsigned int bit_depth;
   vpx_color_space_t color_space;
-  int color_range;
+  vpx_color_range_t color_range;
   int render_width;
   int render_height;