fix: Prefer Dolby Vision p5 over Dolby Vision p8 (#7745)

Author: avelad

lib/util/mime_utils.js

@@ -179,6 +179,9 @@ shaka.util.MimeUtils = class {
         return 'vvc'; // H266
       case base === 'dvh1':
       case base === 'dvhe':
+        if (profile && profile.startsWith('05')) {
+          return 'dovi-p5'; // Dolby Vision profile 5
+        }
         return 'dovi-hevc'; // Dolby Vision based in HEVC
       case base === 'dvav':
       case base === 'dva1':

lib/util/stream_utils.js

@@ -146,9 +146,10 @@ shaka.util.StreamUtils = class {
       'vp09': 0.9,
       'hevc': 0.85,
       'dovi-hevc': 0.8,
-      'av01': 0.75,
-      'dovi-av1': 0.7,
-      'vvc': 0.65,
+      'dovi-p5': 0.75,
+      'av01': 0.7,
+      'dovi-av1': 0.65,
+      'vvc': 0.6,
     };
 
     const videoStreams = Array.from(videoStreamsSet)

test/util/mime_utils_unit.js

@@ -54,8 +54,11 @@ describe('MimeUtils', () => {
     expect(getNormalizedCodec('vvc1')).toBe('vvc');
     expect(getNormalizedCodec('vvi1')).toBe('vvc');
 
-    expect(getNormalizedCodec('dvh1.05')).toBe('dovi-hevc');
-    expect(getNormalizedCodec('dvhe.05')).toBe('dovi-hevc');
+    expect(getNormalizedCodec('dvh1.05')).toBe('dovi-p5');
+    expect(getNormalizedCodec('dvhe.05')).toBe('dovi-p5');
+
+    expect(getNormalizedCodec('dvh1.08')).toBe('dovi-hevc');
+    expect(getNormalizedCodec('dvhe.08')).toBe('dovi-hevc');
 
     expect(getNormalizedCodec('dva1.05')).toBe('dovi-avc');
     expect(getNormalizedCodec('dvav.05')).toBe('dovi-avc');

test/util/stream_utils_unit.js

@@ -1084,6 +1084,45 @@ describe('StreamUtils', () => {
       expect(manifest.variants[0].video.codecs).toBe('dav1.10.01');
     });
 
+    it('prefer Dolby Vision p5 over Dolby Vision p8', async () => {
+      // Dolby Vision profile 5 has a proprietary color space that produces a
+      // better image than Dolby Vision profile 8 which must be backward
+      // compatible with HEVC.
+      manifest = shaka.test.ManifestGenerator.generate((manifest) => {
+        manifest.addVariant(1, (variant) => {
+          variant.addVideo(2, (stream) => {
+            stream.bandwidth = 4000000;
+            stream.size(1920, 1080);
+            stream.mime('video/mp4', 'dvh1.08.06');
+          });
+        });
+        manifest.addVariant(2, (variant) => {
+          variant.addVideo(3, (stream) => {
+            stream.bandwidth = 4000000;
+            stream.size(1920, 1080);
+            stream.mime('video/mp4', 'dvh1.05.06');
+          });
+        });
+      });
+      navigator.mediaCapabilities.decodingInfo =
+          shaka.test.Util.spyFunc(decodingInfoSpy);
+      decodingInfoSpy.and.callFake((config) => {
+        return Promise.resolve({supported: true, smooth: true});
+      });
+
+      await StreamUtils.getDecodingInfosForVariants(manifest.variants,
+          /* usePersistentLicenses= */false, /* srcEquals= */ false,
+          /* preferredKeySystems= */ []);
+
+      shaka.util.StreamUtils.chooseCodecsAndFilterManifest(manifest,
+          /* preferredVideoCodecs= */[],
+          /* preferredAudioCodecs= */[],
+          /* preferredDecodingAttributes= */[],
+          /* preferredTextFormats= */ []);
+      expect(manifest.variants.length).toBe(1);
+      expect(manifest.variants[0].video.codecs).toBe('dvh1.05.06');
+    });
+
     it('chooses variants by decoding attributes', async () => {
       manifest = shaka.test.ManifestGenerator.generate((manifest) => {
         manifest.addVariant(0, (variant) => {