Implement Chromium side of MediaKeys.isTypeSupported().

BUG=405731

Review URL: https://codereview.chromium.org/557723003

Cr-Commit-Position: refs/heads/master@{#297550}

chrome/renderer/media/chrome_key_systems.cc

@@ -13,6 +13,7 @@
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/common/render_messages.h"
 #include "components/cdm/renderer/widevine_key_systems.h"
+#include "content/public/common/eme_constants.h"
 #include "content/public/renderer/render_thread.h"
 
 #if defined(OS_ANDROID)
@@ -74,8 +75,10 @@ static void AddExternalClearKey(
   KeySystemInfo info(kExternalClearKeyKeySystem);
 
   info.supported_codecs = content::EME_CODEC_WEBM_ALL;
+  info.supported_init_data_types = content::EME_INIT_DATA_TYPE_WEBM;
 #if defined(USE_PROPRIETARY_CODECS)
   info.supported_codecs |= content::EME_CODEC_MP4_ALL;
+  info.supported_init_data_types |= content::EME_INIT_DATA_TYPE_CENC;
 #endif  // defined(USE_PROPRIETARY_CODECS)
 
   info.pepper_type = kExternalClearKeyPepperType;

components/cdm/common/cdm_messages_android.h

@@ -7,7 +7,7 @@
 
 #include <vector>
 
-#include "content/public/common/eme_codec.h"
+#include "content/public/common/eme_constants.h"
 #include "ipc/ipc_message_macros.h"
 
 #define IPC_MESSAGE_START EncryptedMediaMsgStart

components/cdm/renderer/DEPS

 include_rules = [
+  "+content/public/common",
   "+content/public/renderer",
 ]

components/cdm/renderer/android_key_systems.cc

@@ -10,6 +10,7 @@
 #include "base/logging.h"
 #include "components/cdm/common/cdm_messages_android.h"
 #include "components/cdm/renderer/widevine_key_systems.h"
+#include "content/public/common/eme_constants.h"
 #include "content/public/renderer/render_thread.h"
 
 #include "widevine_cdm_version.h"  // In SHARED_INTERMEDIATE_DIR.
@@ -65,6 +66,15 @@ void AddAndroidPlatformKeySystems(
     if (response.compositing_codecs != content::EME_CODEC_NONE) {
       KeySystemInfo info(*it);
       info.supported_codecs = response.compositing_codecs;
+      // Here we assume that support for a container implies support for the
+      // associated initialization data type. KeySystems handles validating
+      // |init_data_type| x |container| pairings.
+      if (response.compositing_codecs & content::EME_CODEC_WEBM_ALL)
+        info.supported_init_data_types |= content::EME_INIT_DATA_TYPE_WEBM;
+#if defined(USE_PROPRIETARY_CODECS)
+      if (response.compositing_codecs & content::EME_CODEC_MP4_ALL)
+        info.supported_init_data_types |= content::EME_INIT_DATA_TYPE_CENC;
+#endif  // defined(USE_PROPRIETARY_CODECS)
       concrete_key_systems->push_back(info);
     }
   }

components/cdm/renderer/widevine_key_systems.cc

@@ -8,6 +8,7 @@
 #include <vector>
 
 #include "base/logging.h"
+#include "content/public/common/eme_constants.h"
 
 #include "widevine_cdm_version.h"  // In SHARED_INTERMEDIATE_DIR.
 
@@ -49,6 +50,16 @@ void AddWidevineWithCodecs(WidevineCdmType widevine_cdm_type,
   // initDataType.
   info.supported_codecs = supported_codecs;
 
+  // Here we assume that support for a container imples support for the
+  // associated initialization data type. KeySystems handles validating
+  // |init_data_type| x |container| pairings.
+  if (supported_codecs & content::EME_CODEC_WEBM_ALL)
+    info.supported_init_data_types |= content::EME_INIT_DATA_TYPE_WEBM;
+#if defined(USE_PROPRIETARY_CODECS)
+  if (supported_codecs & content::EME_CODEC_MP4_ALL)
+    info.supported_init_data_types |= content::EME_INIT_DATA_TYPE_CENC;
+#endif  // defined(USE_PROPRIETARY_CODECS)
+
 #if defined(ENABLE_PEPPER_CDMS)
   info.pepper_type = kWidevineCdmPluginMimeType;
 #endif  // defined(ENABLE_PEPPER_CDMS)

content/content_common.gypi

@@ -57,7 +57,7 @@
       'public/common/context_menu_params.h',
       'public/common/drop_data.cc',
       'public/common/drop_data.h',
-      'public/common/eme_codec.h',
+      'public/common/eme_constants.h',
       'public/common/favicon_url.cc',
       'public/common/favicon_url.h',
       'public/common/file_chooser_params.cc',

content/public/common/eme_codec.h → content/public/common/eme_constants.h

@@ -2,15 +2,30 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CONTENT_PUBLIC_COMMON_EME_CODEC_H_
-#define CONTENT_PUBLIC_COMMON_EME_CODEC_H_
+#ifndef CONTENT_PUBLIC_COMMON_EME_CONSTANTS_H_
+#define CONTENT_PUBLIC_COMMON_EME_CONSTANTS_H_
+
+#include <stdint.h>
 
 namespace content {
 
+// Defines bitmask values that specify registered initialization data types used
+// in Encrypted Media Extensions (EME).
+// The mask values are stored in a SupportedInitDataTypes.
+enum EmeInitDataType {
+  EME_INIT_DATA_TYPE_NONE = 0,
+  EME_INIT_DATA_TYPE_WEBM = 1 << 0,
+#if defined(USE_PROPRIETARY_CODECS)
+  EME_INIT_DATA_TYPE_CENC = 1 << 1,
+#endif  // defined(USE_PROPRIETARY_CODECS)
+};
+
 // Defines bitmask values that specify codecs used in Encrypted Media Extension
 // (EME). Each value represents a codec within a specific container.
 // The mask values are stored in a SupportedCodecs.
 enum EmeCodec {
+  // *_ALL values should only be used for masking, do not use them to specify
+  // codec support because they may be extended to include more codecs.
   EME_CODEC_NONE = 0,
   EME_CODEC_WEBM_VORBIS = 1 << 0,
   EME_CODEC_WEBM_AUDIO_ALL = EME_CODEC_WEBM_VORBIS,
@@ -30,8 +45,9 @@ enum EmeCodec {
 #endif  // defined(USE_PROPRIETARY_CODECS)
 };
 
-typedef uint32 SupportedCodecs;
+typedef uint32_t SupportedInitDataTypes;
+typedef uint32_t SupportedCodecs;
 
 }  // namespace content
 
-#endif  // CONTENT_PUBLIC_COMMON_EME_CODEC_H_
+#endif  // CONTENT_PUBLIC_COMMON_EME_CONSTANTS_H_

content/public/renderer/key_system_info.cc

@@ -8,6 +8,8 @@ namespace content {
 
 KeySystemInfo::KeySystemInfo(const std::string& key_system)
     : key_system(key_system),
+      supported_init_data_types(EME_INIT_DATA_TYPE_NONE),
+      supported_codecs(EME_CODEC_NONE),
       use_aes_decryptor(false) {
 }
 

content/public/renderer/key_system_info.h

@@ -11,7 +11,7 @@
 #include "base/basictypes.h"
 #include "base/containers/hash_tables.h"
 #include "content/common/content_export.h"
-#include "content/public/common/eme_codec.h"
+#include "content/public/common/eme_constants.h"
 
 // Definitions:
 // * Key system
@@ -38,6 +38,9 @@ struct CONTENT_EXPORT KeySystemInfo {
 
   std::string key_system;
 
+  // Specifies registered initialization data types supported by |key_system|.
+  SupportedInitDataTypes supported_init_data_types;
+
   // Specifies codecs supported by |key_system|.
   SupportedCodecs supported_codecs;
 

content/renderer/media/crypto/key_systems.h

@@ -24,6 +24,24 @@ std::string GetUnprefixedKeySystemName(const std::string& key_system);
 // Gets the prefixed key system name for |key_system|.
 std::string GetPrefixedKeySystemName(const std::string& key_system);
 
+// Returns false if a container-specific |init_data_type| is specified with an
+// inappropriate container.
+// TODO(sandersd): Remove this essentially internal detail if the spec is
+// updated to not convolve the two in a single method call.
+// TODO(sandersd): Use enum values instead of strings. http://crbug.com/417440
+bool IsSaneInitDataTypeWithContainer(
+    const std::string& init_data_type,
+    const std::string& container);
+
+// Note: Shouldn't be used for prefixed API as the original
+// IsSupportedKeySystemWithMediaMimeType() path reports UMAs, but this path does
+// not.
+bool IsSupportedKeySystem(const std::string& key_system);
+
+bool IsSupportedKeySystemWithInitDataType(
+    const std::string& key_system,
+    const std::string& init_data_type);
+
 // Returns whether |key_system| is a real supported key system that can be
 // instantiated.
 // Abstract parent |key_system| strings will return false.

content/renderer/media/crypto/key_systems_unittest.cc

@@ -6,6 +6,7 @@
 #include <vector>
 
 #include "content/public/common/content_client.h"
+#include "content/public/common/eme_constants.h"
 #include "content/public/renderer/content_renderer_client.h"
 #include "content/public/renderer/key_system_info.h"
 #include "content/renderer/media/crypto/key_systems.h"
@@ -100,12 +101,14 @@ void TestContentRendererClient::AddKeySystems(
   KeySystemInfo aes(kUsesAes);
   aes.supported_codecs = EME_CODEC_WEBM_ALL;
   aes.supported_codecs |= TEST_CODEC_FOO_ALL;
+  aes.supported_init_data_types = EME_INIT_DATA_TYPE_WEBM;
   aes.use_aes_decryptor = true;
   key_systems->push_back(aes);
 
   KeySystemInfo ext(kExternal);
   ext.supported_codecs = EME_CODEC_WEBM_ALL;
   ext.supported_codecs |= TEST_CODEC_FOO_ALL;
+  ext.supported_init_data_types = EME_INIT_DATA_TYPE_WEBM;
   ext.parent_key_system = kExternalParent;
 #if defined(ENABLE_PEPPER_CDMS)
   ext.pepper_type = "application/x-ppapi-external-cdm";
@@ -113,6 +116,7 @@ void TestContentRendererClient::AddKeySystems(
   key_systems->push_back(ext);
 }
 
+// TODO(sandersd): Refactor. http://crbug.com/417444
 class KeySystemsTest : public testing::Test {
  protected:
   KeySystemsTest() {