Re-add AC3/EAC3 audio demuxing support

content/browser/media/media_canplaytype_browsertest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <string>
 
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "content/browser/media/media_browsertest.h"
 #include "content/public/test/browser_test_utils.h"
@@ skipping 38 matching lines @@
 #endif
 
 #if BUILDFLAG(ENABLE_MSE_MPEG2TS_STREAM_PARSER)
 const char* kMp2tsMaybe = kPropMaybe;
 const char* kMp2tsProbably = kPropProbably;
 #else
 const char* kMp2tsMaybe = kNot;
 const char* kMp2tsProbably = kNot;
 #endif
 
+#if BUILDFLAG(ENABLE_AC3_EAC3_AUDIO_DEMUXING)
+const char* kAc3Eac3Probably = kPropProbably;
+#else
+const char* kAc3Eac3Probably = kNot;
+#endif
+
+#if BUILDFLAG(ENABLE_MSE_MPEG2TS_STREAM_PARSER) && \
+    BUILDFLAG(ENABLE_AC3_EAC3_AUDIO_DEMUXING)
+const char* kMp2tsAc3Eac3Probably = kPropProbably;
+#else
+const char* kMp2tsAc3Eac3Probably = kNot;
+#endif
+
 namespace content {
 
 class MediaCanPlayTypeTest : public MediaBrowserTest {
  public:
   MediaCanPlayTypeTest() : url_("about:blank") { }
 
   void SetUpOnMainThread() override { NavigateToURL(shell(), url_); }
 
   std::string CanPlay(const std::string& type) {
     std::string command("document.createElement('video').canPlayType(");
@@ skipping 144 matching lines @@
               CanPlay("'" + mime + "; codecs=\", AVC3.64001F, MP4.40.02\"'"));
 
     // Unknown codecs.
     EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"avc2\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"avc4\"'"));
 
     EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"avc1x\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"avc3x\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"mp4ax\"'"));
 
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"ac\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"ec\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"ac-\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"ec-\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"ac-2\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"ec-2\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"ac3\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"ec3\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"ac-4\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"ec-4\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"mp4a.a4\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"mp4a.a7\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"mp4a.a5.\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"mp4a.a6.\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"mp4a.a5.1\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"mp4a.a6.1\"'"));
+
     EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"unknown\"'"));
 
     // Don't allow incomplete/ambiguous codec ids for HEVC.
     // Codec string must have info about codec level/profile, as described in
     // ISO/IEC FDIS 14496-15 section E.3, for example "hev1.1.6.L93.B0"
     EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"hev1\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"hvc1\"'"));
 
     // Invalid codecs that look like something similar to HEVC/H.265
     EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"hev1x\"'"));
@@ skipping 60 matching lines @@
     EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"hvc1.1.6.L93.B0\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"hev1.1.6.L93.B0,opus\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"hvc1.1.6.L93.B0,opus\"'"));
 
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"mp4a.40\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"mp4a.40.2\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"mp4a.40.02\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"theora, mp4a.40.2\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"theora, mp4a.40.02\"'"));
 
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"ac-3\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"ec-3\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"mp4a.A5\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"mp4a.A6\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"mp4a.a5\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"mp4a.a6\"'"));
+
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"1\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"theora, 1\"'"));
 
     // Codecs are case sensitive.
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"Theora\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"Opus\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"Vorbis\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"Theora, Opus\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"Theora, Vorbis\"'"));
 
@@ skipping 29 matching lines @@
     EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"hvc1.1.6.L93.B0,opus\"'"));
 
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"mp4a.40\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"mp4a.40.2\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"mp4a.40.02\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"vp8, mp4a.40\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"vp9, mp4a.40\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"vp8.0, mp4a.40\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"vp9.0, mp4a.40\"'"));
 
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"ac-3\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"ec-3\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"mp4a.A5\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"mp4a.A6\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"mp4a.a5\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"mp4a.a6\"'"));
+
     // Codecs are case sensitive.
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"VP8, Vorbis\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"VP8.0, Opus\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"VP9, Vorbis\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"VP9.0, Opus\"'"));
 
     // Unknown codec.
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"unknown\"'"));
   }
 
@@ skipping 19 matching lines @@
 
     EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"hev1.1.6.L93.B0\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"hvc1.1.6.L93.B0\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"hev1.1.6.L93.B0,opus\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"hvc1.1.6.L93.B0,opus\"'"));
 
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"mp4a.40\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"mp4a.40.2\"'"));
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"mp4a.40.02\"'"));
 
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"ac-3\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"ec-3\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"mp4a.A5\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"mp4a.A6\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"mp4a.a5\"'"));
+    EXPECT_EQ(kNot, CanPlay("'" + mime + "; codecs=\"mp4a.a6\"'"));
+
     // Unknown codec.
     EXPECT_EQ(kNot, CanPlay("'" + mime +"; codecs=\"unknown\"'"));
   }
 
  private:
   GURL url_;
   DISALLOW_COPY_AND_ASSIGN(MediaCanPlayTypeTest);
 };
 
 IN_PROC_BROWSER_TEST_F(MediaCanPlayTypeTest, CodecSupportTest_wav) {
@@ skipping 188 matching lines @@
             CanPlay("'video/mp4; codecs=\"avc1.42E01E, mp4a.40.2\"'"));
   EXPECT_EQ(kPropProbably,
             CanPlay("'video/mp4; codecs=\"avc1.42E01E, mp4a.40.02\"'"));
   EXPECT_EQ(kPropProbably,
             CanPlay("'video/mp4; codecs=\"avc3.42E01E, mp4a.40.5\"'"));
   EXPECT_EQ(kPropProbably,
             CanPlay("'video/mp4; codecs=\"avc3.42E01E, mp4a.40.05\"'"));
   EXPECT_EQ(kPropProbably,
             CanPlay("'video/mp4; codecs=\"avc3.42E01E, mp4a.40.29\"'"));
 
+  // AC3 and EAC3 (aka Dolby Digital Plus, DD+) audio codecs.
+  // TODO(servolk): Strictly speaking only mp4a.A5 and mp4a.A6 codec ids are
+  // valid according to RFC 6381 section 3.3, 3.4. Lower-case oti (mp4a.a5 and
+  // mp4a.a6) should be rejected. But we used to allow those in older versions
+  // of Chromecast firmware and some apps (notably MPL) depend on those codec
+  // types being supported, so they should be allowed for now (crbug.com/564960)
+  EXPECT_EQ(kAc3Eac3Probably, CanPlay("'video/mp4; codecs=\"ac-3\"'"));
+  EXPECT_EQ(kAc3Eac3Probably, CanPlay("'video/mp4; codecs=\"mp4a.a5\"'"));
+  EXPECT_EQ(kAc3Eac3Probably, CanPlay("'video/mp4; codecs=\"mp4a.A5\"'"));
+  EXPECT_EQ(kAc3Eac3Probably, CanPlay("'video/mp4; codecs=\"ec-3\"'"));
+  EXPECT_EQ(kAc3Eac3Probably, CanPlay("'video/mp4; codecs=\"mp4a.a6\"'"));
+  EXPECT_EQ(kAc3Eac3Probably, CanPlay("'video/mp4; codecs=\"mp4a.A6\"'"));
+  EXPECT_EQ(kAc3Eac3Probably,
+            CanPlay("'video/mp4; codecs=\"avc1.640028,ac-3\"'"));
+  EXPECT_EQ(kAc3Eac3Probably,
+            CanPlay("'video/mp4; codecs=\"avc1.640028,mp4a.a5\"'"));
+  EXPECT_EQ(kAc3Eac3Probably,
+            CanPlay("'video/mp4; codecs=\"avc1.640028,mp4a.A5\"'"));
+  EXPECT_EQ(kAc3Eac3Probably,
+            CanPlay("'video/mp4; codecs=\"avc1.640028,ec-3\"'"));
+  EXPECT_EQ(kAc3Eac3Probably,
+            CanPlay("'video/mp4; codecs=\"avc1.640028,mp4a.a6\"'"));
+  EXPECT_EQ(kAc3Eac3Probably,
+            CanPlay("'video/mp4; codecs=\"avc1.640028,mp4a.A6\"'"));
+
   EXPECT_EQ(kPropMaybe, CanPlay("'video/mp4; codecs=\"avc1, mp4a.40.2\"'"));
   EXPECT_EQ(kPropMaybe, CanPlay("'video/mp4; codecs=\"avc1, mp4a.40.02\"'"));
   EXPECT_EQ(kPropMaybe, CanPlay("'video/mp4; codecs=\"avc3, mp4a.40.2\"'"));
   EXPECT_EQ(kPropMaybe, CanPlay("'video/mp4; codecs=\"avc3, mp4a.40.02\"'"));
   EXPECT_EQ(kPropMaybe,
             CanPlay("'video/mp4; codecs=\"avc1.42E01E, mp4a.40\"'"));
   EXPECT_EQ(kPropMaybe,
             CanPlay("'video/mp4; codecs=\"avc3.42E01E, mp4a.40\"'"));
 
   // TODO(servolk): Add more unit test coverage once we have more info about
@@ skipping 54 matching lines @@
 
   EXPECT_EQ(kHevcSupported,
             CanPlay("'video/x-m4v; codecs=\"hev1.1.6.L93.B0\"'"));
   EXPECT_EQ(kHevcSupported,
             CanPlay("'video/x-m4v; codecs=\"hvc1.1.6.L93.B0\"'"));
   EXPECT_EQ(kHevcSupported,
             CanPlay("'video/x-m4v; codecs=\"hev1.1.6.L93.B0, mp4a.40.5\"'"));
   EXPECT_EQ(kHevcSupported,
             CanPlay("'video/x-m4v; codecs=\"hvc1.1.6.L93.B0, mp4a.40.5\"'"));
 
+  EXPECT_EQ(kAc3Eac3Probably, CanPlay("'video/x-m4v; codecs=\"ac-3\"'"));
+  EXPECT_EQ(kAc3Eac3Probably, CanPlay("'video/x-m4v; codecs=\"mp4a.a5\"'"));
+  EXPECT_EQ(kAc3Eac3Probably, CanPlay("'video/x-m4v; codecs=\"mp4a.A5\"'"));
+  EXPECT_EQ(kAc3Eac3Probably, CanPlay("'video/x-m4v; codecs=\"ec-3\"'"));
+  EXPECT_EQ(kAc3Eac3Probably, CanPlay("'video/x-m4v; codecs=\"mp4a.a6\"'"));
+  EXPECT_EQ(kAc3Eac3Probably, CanPlay("'video/x-m4v; codecs=\"mp4a.A6\"'"));
+  EXPECT_EQ(kAc3Eac3Probably,
+            CanPlay("'video/x-m4v; codecs=\"avc1.640028,ac-3\"'"));
+  EXPECT_EQ(kAc3Eac3Probably,
+            CanPlay("'video/x-m4v; codecs=\"avc1.640028,mp4a.a5\"'"));
+  EXPECT_EQ(kAc3Eac3Probably,
+            CanPlay("'video/x-m4v; codecs=\"avc1.640028,mp4a.A5\"'"));
+  EXPECT_EQ(kAc3Eac3Probably,
+            CanPlay("'video/x-m4v; codecs=\"avc1.640028,ec-3\"'"));
+  EXPECT_EQ(kAc3Eac3Probably,
+            CanPlay("'video/x-m4v; codecs=\"avc1.640028,mp4a.a6\"'"));
+  EXPECT_EQ(kAc3Eac3Probably,
+            CanPlay("'video/x-m4v; codecs=\"avc1.640028,mp4a.A6\"'"));
+
   TestMPEGUnacceptableCombinations("video/x-m4v");
 
   EXPECT_EQ(kPropMaybe, CanPlay("'audio/mp4'"));
   EXPECT_EQ(kPropMaybe, CanPlay("'audio/mp4; codecs=\"mp4a.40\"'"));
   EXPECT_EQ(kPropProbably, CanPlay("'audio/mp4; codecs=\"mp4a.40.2\"'"));
   EXPECT_EQ(kPropProbably, CanPlay("'audio/mp4; codecs=\"mp4a.40.02\"'"));
   EXPECT_EQ(kPropProbably, CanPlay("'audio/mp4; codecs=\"mp4a.40.5\"'"));
   EXPECT_EQ(kPropProbably, CanPlay("'audio/mp4; codecs=\"mp4a.40.05\"'"));
   EXPECT_EQ(kPropProbably, CanPlay("'audio/mp4; codecs=\"mp4a.40.29\"'"));
 
   EXPECT_EQ(kNot, CanPlay("'audio/mp4; codecs=\"avc1\"'"));
   EXPECT_EQ(kNot, CanPlay("'audio/mp4; codecs=\"avc3\"'"));
   EXPECT_EQ(kNot, CanPlay("'audio/mp4; codecs=\"avc1, mp4a.40\"'"));
   EXPECT_EQ(kNot, CanPlay("'audio/mp4; codecs=\"avc3, mp4a.40\"'"));
 
   EXPECT_EQ(kNot, CanPlay("'audio/mp4; codecs=\"avc1.4D401E\"'"));
   EXPECT_EQ(kNot, CanPlay("'audio/mp4; codecs=\"avc3.64001F\"'"));
   EXPECT_EQ(kNot, CanPlay("'audio/mp4; codecs=\"avc1.66.30\"'"));
 
   EXPECT_EQ(kNot, CanPlay("'audio/mp4; codecs=\"hev1.1.6.L93.B0\"'"));
   EXPECT_EQ(kNot, CanPlay("'audio/mp4; codecs=\"hvc1.1.6.L93.B0\"'"));
   EXPECT_EQ(kNot, CanPlay("'audio/mp4; codecs=\"hev1.1.6.L93.B0,mp4a.40.5\"'"));
   EXPECT_EQ(kNot, CanPlay("'audio/mp4; codecs=\"hvc1.1.6.L93.B0,mp4a.40.5\"'"));
 
+  EXPECT_EQ(kAc3Eac3Probably, CanPlay("'audio/mp4; codecs=\"ac-3\"'"));
+  EXPECT_EQ(kAc3Eac3Probably, CanPlay("'audio/mp4; codecs=\"mp4a.a5\"'"));
+  EXPECT_EQ(kAc3Eac3Probably, CanPlay("'audio/mp4; codecs=\"mp4a.A5\"'"));
+  EXPECT_EQ(kAc3Eac3Probably, CanPlay("'audio/mp4; codecs=\"ec-3\"'"));
+  EXPECT_EQ(kAc3Eac3Probably, CanPlay("'audio/mp4; codecs=\"mp4a.a6\"'"));
+  EXPECT_EQ(kAc3Eac3Probably, CanPlay("'audio/mp4; codecs=\"mp4a.A6\"'"));
+
   TestMPEGUnacceptableCombinations("audio/mp4");
 
   EXPECT_EQ(kPropMaybe, CanPlay("'audio/x-m4a'"));
   EXPECT_EQ(kPropMaybe, CanPlay("'audio/x-m4a; codecs=\"mp4a.40\"'"));
   EXPECT_EQ(kPropProbably, CanPlay("'audio/x-m4a; codecs=\"mp4a.40.2\"'"));
   EXPECT_EQ(kPropProbably, CanPlay("'audio/x-m4a; codecs=\"mp4a.40.02\"'"));
   EXPECT_EQ(kPropProbably, CanPlay("'audio/x-m4a; codecs=\"mp4a.40.5\"'"));
   EXPECT_EQ(kPropProbably, CanPlay("'audio/x-m4a; codecs=\"mp4a.40.05\"'"));
   EXPECT_EQ(kPropProbably, CanPlay("'audio/x-m4a; codecs=\"mp4a.40.29\"'"));
 
   EXPECT_EQ(kNot, CanPlay("'audio/x-m4a; codecs=\"avc1\"'"));
   EXPECT_EQ(kNot, CanPlay("'audio/x-m4a; codecs=\"avc3\"'"));
   EXPECT_EQ(kNot, CanPlay("'audio/x-m4a; codecs=\"avc1, mp4a\"'"));
   EXPECT_EQ(kNot, CanPlay("'audio/x-m4a; codecs=\"avc3, mp4a\"'"));
 
   EXPECT_EQ(kNot, CanPlay("'audio/x-m4a; codecs=\"avc1.4D401E\"'"));
   EXPECT_EQ(kNot, CanPlay("'audio/x-m4a; codecs=\"avc3.64001F\"'"));
   EXPECT_EQ(kNot, CanPlay("'audio/x-m4a; codecs=\"avc1.66.30\"'"));
 
   EXPECT_EQ(kNot, CanPlay("'audio/x-m4a; codecs=\"hev1.1.6.L93.B0\"'"));
   EXPECT_EQ(kNot, CanPlay("'audio/x-m4a; codecs=\"hvc1.1.6.L93.B0\"'"));
   EXPECT_EQ(kNot,
             CanPlay("'audio/x-m4a; codecs=\"hev1.1.6.L93.B0, mp4a.40.5\"'"));
   EXPECT_EQ(kNot,
             CanPlay("'audio/x-m4a; codecs=\"hvc1.1.6.L93.B0, mp4a.40.5\"'"));
 
+  EXPECT_EQ(kAc3Eac3Probably, CanPlay("'audio/x-m4a; codecs=\"ac-3\"'"));
+  EXPECT_EQ(kAc3Eac3Probably, CanPlay("'audio/x-m4a; codecs=\"mp4a.a5\"'"));
+  EXPECT_EQ(kAc3Eac3Probably, CanPlay("'audio/x-m4a; codecs=\"mp4a.A5\"'"));
+  EXPECT_EQ(kAc3Eac3Probably, CanPlay("'audio/x-m4a; codecs=\"ec-3\"'"));
+  EXPECT_EQ(kAc3Eac3Probably, CanPlay("'audio/x-m4a; codecs=\"mp4a.a6\"'"));
+  EXPECT_EQ(kAc3Eac3Probably, CanPlay("'audio/x-m4a; codecs=\"mp4a.A6\"'"));
+
   TestMPEGUnacceptableCombinations("audio/x-m4a");
 }
 
 // When modifying this test, also change CodecSupportTest_Avc3Variants.
 IN_PROC_BROWSER_TEST_F(MediaCanPlayTypeTest, CodecSupportTest_Avc1Variants) {
   // avc1 without extensions results in "maybe" for compatibility.
   EXPECT_EQ(kPropMaybe, CanPlay("'video/mp4; codecs=\"avc1\"'"));
 
   // Any 6-digit hexadecimal number will result in at least "maybe".
   EXPECT_EQ(kPropMaybe, CanPlay("'video/mp4; codecs=\"avc1.123456\"'"));
@@ skipping 366 matching lines @@
 
   EXPECT_EQ(kNot,
       CanPlay("'application/x-mpegurl; codecs=\"hev1.1.6.L93.B0\"'"));
   EXPECT_EQ(kNot,
       CanPlay("'application/x-mpegurl; codecs=\"hvc1.1.6.L93.B0\"'"));
   EXPECT_EQ(kNot,
       CanPlay("'application/x-mpegurl; codecs=\"hev1.1.6.L93.B0,mp4a.40.5\"'"));
   EXPECT_EQ(kNot,
       CanPlay("'application/x-mpegurl; codecs=\"hvc1.1.6.L93.B0,mp4a.40.5\"'"));
 
+  EXPECT_EQ(kNot, CanPlay("'application/x-mpegurl; codecs=\"ac-3\"'"));
+  EXPECT_EQ(kNot, CanPlay("'application/x-mpegurl; codecs=\"ec-3\"'"));
+  EXPECT_EQ(kNot, CanPlay("'application/x-mpegurl; codecs=\"mp4a.A5\"'"));
+  EXPECT_EQ(kNot, CanPlay("'application/x-mpegurl; codecs=\"mp4a.A6\"'"));
+  EXPECT_EQ(kNot, CanPlay("'application/x-mpegurl; codecs=\"mp4a.a5\"'"));
+  EXPECT_EQ(kNot, CanPlay("'application/x-mpegurl; codecs=\"mp4a.a6\"'"));
+
   EXPECT_EQ(maybeCanPlayHLS,
             CanPlay("'application/x-mpegurl; codecs=\"avc1, mp4a.40.2\"'"));
   EXPECT_EQ(maybeCanPlayHLS,
             CanPlay("'application/x-mpegurl; codecs=\"avc1, mp4a.40.02\"'"));
   EXPECT_EQ(maybeCanPlayHLS,
             CanPlay("'application/x-mpegurl; codecs=\"avc3, mp4a.40.2\"'"));
   EXPECT_EQ(maybeCanPlayHLS,
             CanPlay("'application/x-mpegurl; codecs=\"avc3, mp4a.40.02\"'"));
   EXPECT_EQ(maybeCanPlayHLS,
       CanPlay("'application/x-mpegurl; codecs=\"avc1.42E01E, mp4a.40\"'"));
@@ skipping 63 matching lines @@
       CanPlay("'application/vnd.apple.mpegurl; codecs=\"hev1.1.6.L93.B0\"'"));
   EXPECT_EQ(kNot,
       CanPlay("'application/vnd.apple.mpegurl; codecs=\"hvc1.1.6.L93.B0\"'"));
   EXPECT_EQ(kNot,
       CanPlay("'application/vnd.apple.mpegurl; "
               "codecs=\"hev1.1.6.L93.B0,mp4a.40.5\"'"));
   EXPECT_EQ(kNot,
       CanPlay("'application/vnd.apple.mpegurl; "
               "codecs=\"hvc1.1.6.L93.B0,mp4a.40.5\"'"));
 
+  EXPECT_EQ(kNot, CanPlay("'application/vnd.apple.mpegurl; codecs=\"ac-3\"'"));
+  EXPECT_EQ(kNot, CanPlay("'application/vnd.apple.mpegurl; codecs=\"ec-3\"'"));
+  EXPECT_EQ(kNot,
+            CanPlay("'application/vnd.apple.mpegurl; codecs=\"mp4a.A5\"'"));
+  EXPECT_EQ(kNot,
+            CanPlay("'application/vnd.apple.mpegurl; codecs=\"mp4a.A6\"'"));
+  EXPECT_EQ(kNot,
+            CanPlay("'application/vnd.apple.mpegurl; codecs=\"mp4a.a5\"'"));
+  EXPECT_EQ(kNot,
+            CanPlay("'application/vnd.apple.mpegurl; codecs=\"mp4a.a6\"'"));
+
   TestMPEGUnacceptableCombinations("application/vnd.apple.mpegurl");
 }
 
 IN_PROC_BROWSER_TEST_F(MediaCanPlayTypeTest, CodecSupportTest_AAC_ADTS) {
   EXPECT_EQ(kPropProbably, CanPlay("'audio/aac'"));
 
   // audio/aac doesn't support the codecs parameter.
   EXPECT_EQ(kNot, CanPlay("'audio/aac; codecs=\"1\"'"));
   EXPECT_EQ(kNot, CanPlay("'audio/aac; codecs=\"aac\"'"));
   EXPECT_EQ(kNot, CanPlay("'audio/aac; codecs=\"mp4a.40.2\"'"));
 }
 
 IN_PROC_BROWSER_TEST_F(MediaCanPlayTypeTest, CodecSupportTest_Mpeg2Ts) {
   EXPECT_EQ(kMp2tsMaybe, CanPlay("'video/mp2t'"));
 
   // video/mp2t must support standard RFC 6381 compliant H.264 / AAC codec ids.
   // H.264 baseline, main, high profiles
   EXPECT_EQ(kMp2tsProbably, CanPlay("'video/mp2t; codecs=\"avc1.42E01E\"'"));
   EXPECT_EQ(kMp2tsProbably, CanPlay("'video/mp2t; codecs=\"avc1.4D401E\"'"));
   EXPECT_EQ(kMp2tsProbably, CanPlay("'video/mp2t; codecs=\"avc1.640028\"'"));
   // AAC LC audio
   EXPECT_EQ(kMp2tsProbably, CanPlay("'video/mp2t; codecs=\"mp4a.40.2\"'"));
   // H.264 + AAC audio combinations
   EXPECT_EQ(kMp2tsProbably,
             CanPlay("'video/mp2t; codecs=\"avc1.42E01E,mp4a.40.2\"'"));
   EXPECT_EQ(kMp2tsProbably,
             CanPlay("'video/mp2t; codecs=\"avc1.4D401E,mp4a.40.2\"'"));
   EXPECT_EQ(kMp2tsProbably,
             CanPlay("'video/mp2t; codecs=\"avc1.640028,mp4a.40.2\"'"));
+  // H.264 + AC3/EAC3 audio combinations
+  EXPECT_EQ(kMp2tsAc3Eac3Probably,
+            CanPlay("'video/mp2t; codecs=\"avc1.640028,ac-3\"'"));
+  EXPECT_EQ(kMp2tsAc3Eac3Probably,
+            CanPlay("'video/mp2t; codecs=\"avc1.640028,ec-3\"'"));
+  EXPECT_EQ(kMp2tsAc3Eac3Probably,
+            CanPlay("'video/mp2t; codecs=\"avc1.640028,mp4a.A5\"'"));
+  EXPECT_EQ(kMp2tsAc3Eac3Probably,
+            CanPlay("'video/mp2t; codecs=\"avc1.640028,mp4a.A6\"'"));
+  EXPECT_EQ(kMp2tsAc3Eac3Probably,
+            CanPlay("'video/mp2t; codecs=\"avc1.640028,mp4a.a5\"'"));
+  EXPECT_EQ(kMp2tsAc3Eac3Probably,
+            CanPlay("'video/mp2t; codecs=\"avc1.640028,mp4a.a6\"'"));
 
   TestMPEGUnacceptableCombinations("video/mp2t");
 }
 
 IN_PROC_BROWSER_TEST_F(MediaCanPlayTypeTest,
                        CodecSupportTest_Mpeg2Ts_LegacyAvc1_codec_ids) {
   // Old-style avc1/H.264 codec ids that are still being used by some HLS
   // streaming apps for backward compatibility.
   // H.264 baseline profile
   EXPECT_EQ(kMp2tsProbably, CanPlay("'video/mp2t; codecs=\"avc1.66.10\"'"));
@@ skipping 35 matching lines @@
   EXPECT_EQ(kMp2tsProbably,
             CanPlay("'video/mp2t; codecs=\"avc1.100.40,mp4a.40.2\"'"));
 }
 
 IN_PROC_BROWSER_TEST_F(MediaCanPlayTypeTest, CodecSupportTest_Mpeg2TsAudio) {
   // audio/mp2t is currently not supported (see also crbug.com/556837).
   EXPECT_EQ(kNot, CanPlay("'audio/mp2t; codecs=\"mp4a.40.2\"'"));
 }
 
 }  // namespace content