Check whether the Pepper CDM is available before adding the key system.

chrome/renderer/media/chrome_key_systems.cc

 // Copyright 2013 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 "chrome/renderer/media/chrome_key_systems.h"
 
 #include "base/logging.h"
+#include "chrome/common/render_messages.h"
+#include "content/public/renderer/render_thread.h"
 
 #include "widevine_cdm_version.h" // In SHARED_INTERMEDIATE_DIR.
 
 // The following must be after widevine_cdm_version.h.
 
 #if defined(WIDEVINE_CDM_AVAILABLE) && defined(WIDEVINE_CDM_MIN_GLIBC_VERSION)
 #include <gnu/libc-version.h>
 #include "base/version.h"
 #endif
 
 using content::KeySystemInfo;
 
 static const char kClearKeyKeySystem[] = "webkit-org.w3.clearkey";
 
 static const char kAudioWebM[] = "audio/webm";
 static const char kVideoWebM[] = "video/webm";
 static const char kVorbis[] = "vorbis";
 static const char kVorbisVP8[] = "vorbis,vp8,vp8.0";
 
 static const char kAudioMp4[] = "audio/mp4";
 static const char kVideoMp4[] = "video/mp4";
 static const char kMp4a[] = "mp4a";
 static const char kAvc1[] = "avc1";
 static const char kMp4aAvc1[] = "mp4a,avc1";
 
+static void AddClearKey(std::vector<KeySystemInfo>* concrete_key_systems) {
+  KeySystemInfo info(kClearKeyKeySystem);
+
+  info.supported_types.push_back(std::make_pair(kAudioWebM, kVorbis));
+  info.supported_types.push_back(std::make_pair(kVideoWebM, kVorbisVP8));
+#if defined(USE_PROPRIETARY_CODECS)
+  info.supported_types.push_back(std::make_pair(kAudioMp4, kMp4a));
+  info.supported_types.push_back(std::make_pair(kVideoMp4, kMp4aAvc1));
+#endif  // defined(USE_PROPRIETARY_CODECS)
+
+  info.use_aes_decryptor = true;
+
+  concrete_key_systems->push_back(info);
+}
+
+#if defined(ENABLE_PEPPER_CDMS)
+static bool IsPepperCdmRegistered(const std::string& pepper_type) {
+  bool is_registered = false;
+  content::RenderThread::Get()->Send(
+      new ChromeViewHostMsg_IsInternalPluginRegisteredForMimeType(
+          pepper_type, &is_registered));
+
+  return is_registered;
+}
+
+// External Clear Key (used for testing).
+static void AddExternalClearKey(
+    std::vector<KeySystemInfo>* concrete_key_systems) {
+  static const char kExternalClearKeyKeySystem[] =
+      "org.chromium.externalclearkey";
+  static const char kExternalClearKeyPepperType[] =
+      "application/x-ppapi-clearkey-cdm";
+
+  if (!IsPepperCdmRegistered(kExternalClearKeyPepperType))
+    return;
+
+  KeySystemInfo info(kExternalClearKeyKeySystem);
+
+  info.supported_types.push_back(std::make_pair(kAudioWebM, kVorbis));
+  info.supported_types.push_back(std::make_pair(kVideoWebM, kVorbisVP8));
+#if defined(USE_PROPRIETARY_CODECS)
+  info.supported_types.push_back(std::make_pair(kAudioMp4, kMp4a));
+  info.supported_types.push_back(std::make_pair(kVideoMp4, kMp4aAvc1));
+#endif  // defined(USE_PROPRIETARY_CODECS)
+
+  info.pepper_type = kExternalClearKeyPepperType;
+
+  concrete_key_systems->push_back(info);
+}
+#endif  // defined(ENABLE_PEPPER_CDMS)
+
+
 #if defined(WIDEVINE_CDM_AVAILABLE)
 // Defines bitmask values used to specify supported codecs.
 // Each value represents a codec within a specific container.
 enum SupportedCodecs {
   WEBM_VP8_AND_VORBIS = 1 << 0,
 #if defined(USE_PROPRIETARY_CODECS)
   MP4_AAC = 1 << 1,
   MP4_AVC1 = 1 << 2,
 #endif  // defined(USE_PROPRIETARY_CODECS)
 };
 
 static void AddWidevineWithCodecs(
     SupportedCodecs supported_codecs,
     std::vector<KeySystemInfo>* concrete_key_systems) {
   static const char kWidevineParentKeySystem[] = "com.widevine";
 #if defined(OS_ANDROID)
   static const uint8 kWidevineUuid[16] = {
       0xED, 0xEF, 0x8B, 0xA9, 0x79, 0xD6, 0x4A, 0xCE,
       0xA3, 0xC8, 0x27, 0xDC, 0xD5, 0x1D, 0x21, 0xED };
 #endif
 
-#if defined(WIDEVINE_CDM_MIN_GLIBC_VERSION)
-  Version glibc_version(gnu_get_libc_version());
-  DCHECK(glibc_version.IsValid());
-  if (glibc_version.IsOlderThan(WIDEVINE_CDM_MIN_GLIBC_VERSION))
-    return;
-#endif  // defined(WIDEVINE_CDM_MIN_GLIBC_VERSION)
-
   KeySystemInfo info(kWidevineKeySystem);
 
   if (supported_codecs & WEBM_VP8_AND_VORBIS) {
     info.supported_types.push_back(std::make_pair(kAudioWebM, kVorbis));
     info.supported_types.push_back(std::make_pair(kVideoWebM, kVorbisVP8));
   }
 
 #if defined(USE_PROPRIETARY_CODECS)
   if (supported_codecs & MP4_AAC)
     info.supported_types.push_back(std::make_pair(kAudioMp4, kMp4a));
@@ skipping 12 matching lines @@
   info.uuid.assign(kWidevineUuid, kWidevineUuid + arraysize(kWidevineUuid));
 #endif  // defined(ENABLE_PEPPER_CDMS)
 
   concrete_key_systems->push_back(info);
 }
 
 #if defined(ENABLE_PEPPER_CDMS)
 // Supported types are determined at compile time.
 static void AddPepperBasedWidevine(
     std::vector<KeySystemInfo>* concrete_key_systems) {
+#if defined(WIDEVINE_CDM_MIN_GLIBC_VERSION)
+  Version glibc_version(gnu_get_libc_version());
+  DCHECK(glibc_version.IsValid());
+  if (glibc_version.IsOlderThan(WIDEVINE_CDM_MIN_GLIBC_VERSION))
+    return;
+#endif  // defined(WIDEVINE_CDM_MIN_GLIBC_VERSION)
+
+  if (!IsPepperCdmRegistered(kWidevineCdmPluginMimeType)) {
+    DVLOG(1) << "Widevine CDM is not currently available.";
+    return;
+  }
+
   SupportedCodecs supported_codecs = WEBM_VP8_AND_VORBIS;
 
 #if defined(USE_PROPRIETARY_CODECS)
 #if defined(WIDEVINE_CDM_AAC_SUPPORT_AVAILABLE)
   supported_codecs = static_cast<SupportedCodecs>(supported_codecs | MP4_AAC);
 #endif
 #if defined(WIDEVINE_CDM_AVC1_SUPPORT_AVAILABLE)
   supported_codecs = static_cast<SupportedCodecs>(supported_codecs | MP4_AVC1);
 #endif
 #endif  // defined(USE_PROPRIETARY_CODECS)
 
   AddWidevineWithCodecs(supported_codecs, concrete_key_systems);
 }
 #elif defined(OS_ANDROID)
 static void AddAndroidWidevine(
     std::vector<KeySystemInfo>* concrete_key_systems) {
 #if defined(USE_PROPRIETARY_CODECS)
   SupportedCodecs supported_codecs =
       static_cast<SupportedCodecs>(MP4_AAC | MP4_AVC1);
   AddWidevineWithCodecs(supported_codecs, concrete_key_systems);
 #endif  // defined(USE_PROPRIETARY_CODECS)
 }
 #endif  // defined(ENABLE_PEPPER_CDMS)
 #endif  // defined(WIDEVINE_CDM_AVAILABLE)
 
-static void AddClearKey(std::vector<KeySystemInfo>* concrete_key_systems) {
-  KeySystemInfo info(kClearKeyKeySystem);
-
-  info.supported_types.push_back(std::make_pair(kAudioWebM, kVorbis));
-  info.supported_types.push_back(std::make_pair(kVideoWebM, kVorbisVP8));
-#if defined(USE_PROPRIETARY_CODECS)
-  info.supported_types.push_back(std::make_pair(kAudioMp4, kMp4a));
-  info.supported_types.push_back(std::make_pair(kVideoMp4, kMp4aAvc1));
-#endif  // defined(USE_PROPRIETARY_CODECS)
-
-  info.use_aes_decryptor = true;
-
-  concrete_key_systems->push_back(info);
-}
-
-#if defined(ENABLE_PEPPER_CDMS)
-// External Clear Key (used for testing).
-static void AddExternalClearKey(
-    std::vector<KeySystemInfo>* concrete_key_systems) {
-  static const char kExternalClearKeyKeySystem[] =
-      "org.chromium.externalclearkey";
-  static const char kExternalClearKeyPepperType[] =
-      "application/x-ppapi-clearkey-cdm";
-
-  KeySystemInfo info(kExternalClearKeyKeySystem);
-
-  info.supported_types.push_back(std::make_pair(kAudioWebM, kVorbis));
-  info.supported_types.push_back(std::make_pair(kVideoWebM, kVorbisVP8));
-#if defined(USE_PROPRIETARY_CODECS)
-  info.supported_types.push_back(std::make_pair(kAudioMp4, kMp4a));
-  info.supported_types.push_back(std::make_pair(kVideoMp4, kMp4aAvc1));
-#endif  // defined(USE_PROPRIETARY_CODECS)
-
-  info.pepper_type = kExternalClearKeyPepperType;
-
-  concrete_key_systems->push_back(info);
-}
-#endif  // defined(ENABLE_PEPPER_CDMS)
-
 void AddChromeKeySystems(std::vector<KeySystemInfo>* key_systems_info) {
   AddClearKey(key_systems_info);
 
 #if defined(ENABLE_PEPPER_CDMS)
   AddExternalClearKey(key_systems_info);
 #endif
 
 #if defined(WIDEVINE_CDM_AVAILABLE)
 #if defined(ENABLE_PEPPER_CDMS)
   AddPepperBasedWidevine(key_systems_info);
 #elif defined(OS_ANDROID)
   AddAndroidWidevine(key_systems_info);
 #endif
 #endif
 }