libobs: Add Rec. 2020 video_colorspace enum values

One for PQ, and one for HLG. Including transfer function as part of the
color space simplifies logic by avoid invalid combinations.

docs/sphinx/reference-libobs-media-io.rst

@@ -39,10 +39,12 @@ Video Handler
 
    YUV color space.  Can be one of the following values:
 
-   - VIDEO_CS_DEFAULT - Equivalent to VIDEO_CS_709
-   - VIDEO_CS_601     - 601 color space
-   - VIDEO_CS_709     - 709 color space
-   - VIDEO_CS_SRGB    - sRGB color space
+   - VIDEO_CS_DEFAULT  - Equivalent to VIDEO_CS_709
+   - VIDEO_CS_601      - Rec. 601 color space
+   - VIDEO_CS_709      - Rec. 709 color space
+   - VIDEO_CS_SRGB     - sRGB color space
+   - VIDEO_CS_2020_PQ  - Rec. 2020 color space, PQ transfer
+   - VIDEO_CS_2020_HLG - Rec. 2020 color space, HLG transfer
 
 ---------------------
 

docs/sphinx/reference-outputs.rst

@@ -695,6 +695,24 @@ Functions used by outputs
    
            /* planar 4:4:4 */
            VIDEO_FORMAT_I444,
+   
+           /* more packed uncompressed formats */
+           VIDEO_FORMAT_BGR3,
+   
+           /* planar 4:2:2 */
+           VIDEO_FORMAT_I422,
+   
+           /* planar 4:2:0 with alpha */
+           VIDEO_FORMAT_I40A,
+   
+           /* planar 4:2:2 with alpha */
+           VIDEO_FORMAT_I42A,
+   
+           /* planar 4:4:4 with alpha */
+           VIDEO_FORMAT_YUVA,
+   
+           /* packed 4:4:4 with alpha */
+           VIDEO_FORMAT_AYUV,
    };
    
    enum video_colorspace {
@@ -702,6 +720,8 @@ Functions used by outputs
            VIDEO_CS_601,
            VIDEO_CS_709,
            VIDEO_CS_SRGB,
+           VIDEO_CS_2020_PQ,
+           VIDEO_CS_2020_HLG,
    };
    
    enum video_range_type {