Add CdmService to keep track of CDMs

chrome/common/chrome_content_client.cc

 // Copyright (c) 2012 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/common/chrome_content_client.h"
 
 #include <stdint.h>
 
 #include <memory>
 
@@ skipping 15 matching lines @@
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/crash_keys.h"
 #include "chrome/common/pepper_flash.h"
 #include "chrome/common/secure_origin_whitelist.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/grit/common_resources.h"
 #include "components/data_reduction_proxy/content/common/data_reduction_proxy_messages.h"
 #include "components/dom_distiller/core/url_constants.h"
 #include "components/version_info/version_info.h"
+#include "content/public/common/cdm_info.h"
 #include "content/public/common/content_constants.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/url_constants.h"
 #include "content/public/common/user_agent.h"
 #include "extensions/common/constants.h"
 #include "gpu/config/gpu_info.h"
 #include "net/http/http_util.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/layout.h"
 #include "ui/base/resource/resource_bundle.h"
@@ skipping 46 matching lines @@
 content::PepperPluginInfo::GetInterfaceFunc g_pdf_get_interface;
 content::PepperPluginInfo::PPP_InitializeModuleFunc g_pdf_initialize_module;
 content::PepperPluginInfo::PPP_ShutdownModuleFunc g_pdf_shutdown_module;
 
 #if !defined(DISABLE_NACL)
 content::PepperPluginInfo::GetInterfaceFunc g_nacl_get_interface;
 content::PepperPluginInfo::PPP_InitializeModuleFunc g_nacl_initialize_module;
 content::PepperPluginInfo::PPP_ShutdownModuleFunc g_nacl_shutdown_module;
 #endif
 
+#if defined(WIDEVINE_CDM_AVAILABLE) && defined(ENABLE_PEPPER_CDMS) && \
+    !defined(WIDEVINE_CDM_IS_COMPONENT)
+static bool IsWidevineAvailable(base::FilePath* adapter_path,
+                                base::FilePath* cdm_path,
+                                std::vector<std::string>* codecs_supported) {
+  static bool skip_widevine_cdm_file_check = false;
+  // TODO(jrummell): We should add a new path for DIR_WIDEVINE_CDM and use that
+  // to locate the CDM and the CDM adapter.
+  if (PathService::Get(chrome::FILE_WIDEVINE_CDM_ADAPTER, adapter_path)) {
+    *cdm_path = adapter_path->DirName().AppendASCII(kWidevineCdmFileName);
+    if (skip_widevine_cdm_file_check ||
+        (base::PathExists(*adapter_path) && base::PathExists(*cdm_path))) {
+      skip_widevine_cdm_file_check = true;
+
+      // Add the supported codecs as if they came from the component manifest.
+      // This list must match the CDM that is being bundled with Chrome.
+      codecs_supported->push_back(kCdmSupportedCodecVp8);
+      codecs_supported->push_back(kCdmSupportedCodecVp9);
+#if defined(USE_PROPRIETARY_CODECS)
+      codecs_supported->push_back(kCdmSupportedCodecAvc1);
+#endif  // defined(USE_PROPRIETARY_CODECS)
+      return true;
+    }
+  }
+
+  return false;
+}
+#endif  // defined(WIDEVINE_CDM_AVAILABLE) && defined(ENABLE_PEPPER_CDMS) &&
+        // !defined(WIDEVINE_CDM_IS_COMPONENT)
+
 // Appends the known built-in plugins to the given vector. Some built-in
 // plugins are "internal" which means they are compiled into the Chrome binary,
 // and some are extra shared libraries distributed with the browser (these are
 // not marked internal, aside from being automatically registered, they're just
 // regular plugins).
 void ComputeBuiltInPlugins(std::vector<content::PepperPluginInfo>* plugins) {
 #if defined(ENABLE_PDF)
   content::PepperPluginInfo pdf_info;
   pdf_info.is_internal = true;
   pdf_info.is_out_of_process = true;
   pdf_info.name = ChromeContentClient::kPDFPluginName;
   pdf_info.description = kPDFPluginDescription;
   pdf_info.path = base::FilePath::FromUTF8Unsafe(
       ChromeContentClient::kPDFPluginPath);
   content::WebPluginMimeType pdf_mime_type(
       kPDFPluginOutOfProcessMimeType,
       kPDFPluginExtension,
       kPDFPluginDescription);
   pdf_info.mime_types.push_back(pdf_mime_type);
   pdf_info.internal_entry_points.get_interface = g_pdf_get_interface;
   pdf_info.internal_entry_points.initialize_module = g_pdf_initialize_module;
   pdf_info.internal_entry_points.shutdown_module = g_pdf_shutdown_module;
   pdf_info.permissions = kPDFPluginPermissions;
   plugins->push_back(pdf_info);
 #endif  // defined(ENABLE_PDF)
 
-  base::FilePath path;
-
 #if !defined(DISABLE_NACL)
   // Handle Native Client just like the PDF plugin. This means that it is
   // enabled by default for the non-portable case.  This allows apps installed
   // from the Chrome Web Store to use NaCl even if the command line switch
   // isn't set.  For other uses of NaCl we check for the command line switch.
+  base::FilePath path;
   if (PathService::Get(chrome::FILE_NACL_PLUGIN, &path)) {
     content::PepperPluginInfo nacl;
     // The nacl plugin is now built into the Chromium binary.
     nacl.is_internal = true;
     nacl.path = path;
     nacl.name = nacl::kNaClPluginName;
     content::WebPluginMimeType nacl_mime_type(nacl::kNaClPluginMimeType,
                                               nacl::kNaClPluginExtension,
                                               nacl::kNaClPluginDescription);
     nacl.mime_types.push_back(nacl_mime_type);
     content::WebPluginMimeType pnacl_mime_type(nacl::kPnaclPluginMimeType,
                                                nacl::kPnaclPluginExtension,
                                                nacl::kPnaclPluginDescription);
     nacl.mime_types.push_back(pnacl_mime_type);
     nacl.internal_entry_points.get_interface = g_nacl_get_interface;
     nacl.internal_entry_points.initialize_module = g_nacl_initialize_module;
     nacl.internal_entry_points.shutdown_module = g_nacl_shutdown_module;
     nacl.permissions = ppapi::PERMISSION_PRIVATE | ppapi::PERMISSION_DEV;
     plugins->push_back(nacl);
   }
 #endif  // !defined(DISABLE_NACL)
 
 #if defined(WIDEVINE_CDM_AVAILABLE) && defined(ENABLE_PEPPER_CDMS) && \
     !defined(WIDEVINE_CDM_IS_COMPONENT)
-  static bool skip_widevine_cdm_file_check = false;
-  if (PathService::Get(chrome::FILE_WIDEVINE_CDM_ADAPTER, &path)) {
-    if (skip_widevine_cdm_file_check || base::PathExists(path)) {
-      content::PepperPluginInfo widevine_cdm;
-      widevine_cdm.is_out_of_process = true;
-      widevine_cdm.path = path;
-      widevine_cdm.name = kWidevineCdmDisplayName;
-      widevine_cdm.description = kWidevineCdmDescription +
-                                 std::string(" (version: ") +
-                                 WIDEVINE_CDM_VERSION_STRING + ")";
-      widevine_cdm.version = WIDEVINE_CDM_VERSION_STRING;
-      content::WebPluginMimeType widevine_cdm_mime_type(
-          kWidevineCdmPluginMimeType,
-          kWidevineCdmPluginExtension,
-          kWidevineCdmPluginMimeTypeDescription);
+  base::FilePath adapter_path;
+  base::FilePath cdm_path;
+  std::vector<std::string> codecs_supported;
+  if (IsWidevineAvailable(&adapter_path, &cdm_path, &codecs_supported)) {
+    content::PepperPluginInfo widevine_cdm;
+    widevine_cdm.is_out_of_process = true;
+    widevine_cdm.path = adapter_path;
+    widevine_cdm.name = kWidevineCdmDisplayName;
+    widevine_cdm.description = kWidevineCdmDescription +

[Sorin Jianu, 2016/04/15 01:53:26]

Could use stringprintf.h for more efficient formatting of these literals. It
will eliminate several temporaries created when the rhs of the assignment is
evaluated.

[jrummell, 2016/04/18 20:39:47]

Done.

+                               std::string(" (version: ") +
+                               WIDEVINE_CDM_VERSION_STRING + ")";
+    widevine_cdm.version = WIDEVINE_CDM_VERSION_STRING;
+    content::WebPluginMimeType widevine_cdm_mime_type(
+        kWidevineCdmPluginMimeType, kWidevineCdmPluginExtension,
+        kWidevineCdmPluginMimeTypeDescription);
 
-      // Add the supported codecs as if they came from the component manifest.
-      // This list must match the CDM that is being bundled with Chrome.
-      std::vector<std::string> codecs;
-      codecs.push_back(kCdmSupportedCodecVp8);
-      codecs.push_back(kCdmSupportedCodecVp9);
-#if defined(USE_PROPRIETARY_CODECS)
-      codecs.push_back(kCdmSupportedCodecAvc1);
-#endif  // defined(USE_PROPRIETARY_CODECS)
-      std::string codec_string = base::JoinString(
-          codecs, std::string(1, kCdmSupportedCodecsValueDelimiter));
-      widevine_cdm_mime_type.additional_param_names.push_back(
-          base::ASCIIToUTF16(kCdmSupportedCodecsParamName));
-      widevine_cdm_mime_type.additional_param_values.push_back(
-          base::ASCIIToUTF16(codec_string));
+    widevine_cdm_mime_type.additional_param_names.push_back(
+        base::ASCIIToUTF16(kCdmSupportedCodecsParamName));
+    widevine_cdm_mime_type.additional_param_values.push_back(base::ASCIIToUTF16(
+        base::JoinString(codecs_supported,
+                         std::string(1, kCdmSupportedCodecsValueDelimiter))));
 
-      widevine_cdm.mime_types.push_back(widevine_cdm_mime_type);
-      widevine_cdm.permissions = kWidevineCdmPluginPermissions;
-      plugins->push_back(widevine_cdm);
-
-      skip_widevine_cdm_file_check = true;
-    }
+    widevine_cdm.mime_types.push_back(widevine_cdm_mime_type);
+    widevine_cdm.permissions = kWidevineCdmPluginPermissions;
+    plugins->push_back(widevine_cdm);
   }
 #endif  // defined(WIDEVINE_CDM_AVAILABLE) && defined(ENABLE_PEPPER_CDMS) &&
         // !defined(WIDEVINE_CDM_IS_COMPONENT)
 }
 
 content::PepperPluginInfo CreatePepperFlashInfo(const base::FilePath& path,
                                                 const std::string& version,
                                                 bool is_debug) {
   content::PepperPluginInfo plugin;
 
@@ skipping 308 matching lines @@
     flash_versions.push_back(system_flash.release());
 
   // This function will return only the most recent version of the flash plugin.
   content::PepperPluginInfo* max_flash =
       FindMostRecentPlugin(flash_versions.get());
   if (max_flash)
     plugins->push_back(*max_flash);
 #endif  // defined(ENABLE_PLUGINS)
 }
 
+void ChromeContentClient::AddContentDecryptionModules(
+    std::vector<content::CdmInfo>* cdms) {
+// TODO(jrummell): Need to have a better flag to indicate systems Widevine
+// is available on. For now we continue to use ENABLE_PEPPER_CDMS so that
+// we can experiment between pepper and mojo.
+#if defined(WIDEVINE_CDM_AVAILABLE) && defined(ENABLE_PEPPER_CDMS) && \
+    !defined(WIDEVINE_CDM_IS_COMPONENT)
+  base::FilePath adapter_path;
+  base::FilePath cdm_path;
+  std::vector<std::string> codecs_supported;
+  if (IsWidevineAvailable(&adapter_path, &cdm_path, &codecs_supported)) {
+    // CdmInfo needs |path| to be the actual Widevine library,
+    // not the adapter, so adjust as necessary. It will be in the
+    // same directory as the installed adapter.
+    base::Version version(WIDEVINE_CDM_VERSION_STRING);

[Sorin Jianu, 2016/04/15 01:53:26]

const

[jrummell, 2016/04/18 20:39:47]

Done.

+    DCHECK(version.IsValid());
+    cdms->push_back(content::CdmInfo(kWidevineCdmType, version, cdm_path,
+                                     codecs_supported));
+  }
+#endif  // defined(WIDEVINE_CDM_AVAILABLE) && defined(ENABLE_PEPPER_CDMS) &&
+        // !defined(WIDEVINE_CDM_IS_COMPONENT)
+
+  // TODO(jrummell): Add External Clear Key CDM for testing, if it's available.
+}
+
 #if defined(OS_CHROMEOS)
 static const int kNumChromeStandardURLSchemes = 6;
 #else
 static const int kNumChromeStandardURLSchemes = 5;
 #endif
 static const url::SchemeWithType kChromeStandardURLSchemes[
     kNumChromeStandardURLSchemes] = {
   {extensions::kExtensionScheme, url::SCHEME_WITHOUT_PORT},
   {chrome::kChromeNativeScheme, url::SCHEME_WITHOUT_PORT},
   {extensions::kExtensionResourceScheme, url::SCHEME_WITHOUT_PORT},
@@ skipping 106 matching lines @@
 #if defined(ENABLE_EXTENSIONS)
   return extensions::IsIsolateExtensionsEnabled();
 #else
   return false;
 #endif
 }
 
 base::StringPiece ChromeContentClient::GetOriginTrialPublicKey() {
   return origin_trial_key_manager_.GetPublicKey();
 }