Adds initial key systems support for Chromecast.

R=lcwu@chromium.org,byungchul@chromium.org
BUG=400914

Review URL: https://codereview.chromium.org/568243002

Cr-Commit-Position: refs/heads/master@{#295226}

11 files changed, 212 insertions, 0 deletions

diff --git a/chromecast/chromecast.gyp b/chromecast/chromecast.gyp
index 644273e..90c3c87 100644
--- a/chromecast/chromecast.gyp
+++ b/chromecast/chromecast.gyp
@@ -200,10 +200,12 @@
         'cast_version_header',
         'chromecast_locales.gyp:chromecast_locales_pak',
         'chromecast_locales.gyp:chromecast_settings',
+        'media/media.gyp:media_base',
         '../components/components.gyp:component_metrics_proto',
         '../content/content.gyp:content',
         '../content/content.gyp:content_app_browser',
         '../skia/skia.gyp:skia',
+        '../third_party/widevine/cdm/widevine_cdm.gyp:widevine_cdm_version_h',
       ],
       'sources': [
         'shell/app/cast_main_delegate.cc',
@@ -231,6 +233,8 @@
         'shell/common/cast_content_client.h',
         'shell/renderer/cast_content_renderer_client.cc',
         'shell/renderer/cast_content_renderer_client.h',
+        'shell/renderer/key_systems_cast.cc',
+        'shell/renderer/key_systems_cast.h',
       ],
       'conditions': [
         ['chromecast_branding=="Chrome"', {
@@ -241,6 +245,7 @@
           'sources': [
             'shell/browser/devtools/remote_debugging_server_simple.cc',
             'shell/browser/webui/webui_cast_simple.cc',
+            'shell/renderer/key_systems_cast_simple.cc',
           ],
         }],
       ],
diff --git a/chromecast/media/DEPS b/chromecast/media/DEPS
index cc5cd70..1891d1a 100644
--- a/chromecast/media/DEPS
+++ b/chromecast/media/DEPS
@@ -1,3 +1,4 @@
 include_rules = [
   "+media/base",
+  "+media/cdm",
 ]
diff --git a/chromecast/media/base/key_systems_common.cc b/chromecast/media/base/key_systems_common.cc
new file mode 100644
index 0000000..8925719
--- /dev/null
+++ b/chromecast/media/base/key_systems_common.cc
@@ -0,0 +1,39 @@
+// 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 "chromecast/media/base/key_systems_common.h"
+
+#include <cstddef>
+
+#include "media/cdm/key_system_names.h"
+
+#include "widevine_cdm_version.h" // In SHARED_INTERMEDIATE_DIR.
+
+namespace chromecast {
+namespace media {
+
+const char kChromecastPlayreadyKeySystem[] = "com.chromecast.playready";
+
+CastKeySystem GetKeySystemByName(const std::string& key_system_name) {
+#if defined(WIDEVINE_CDM_AVAILABLE)
+  if (key_system_name.compare(kWidevineKeySystem) == 0) {
+    return KEY_SYSTEM_WIDEVINE;
+  }
+#endif  // defined(WIDEVINE_CDM_AVAILABLE)
+
+#if defined(PLAYREADY_CDM_AVAILABLE)
+  if (key_system_name.compare(kChromecastPlayreadyKeySystem) == 0) {
+    return KEY_SYSTEM_PLAYREADY;
+  }
+#endif  // defined(PLAYREADY_CDM_AVAILABLE)
+
+  if (key_system_name.compare(::media::kClearKey) == 0) {
+    return KEY_SYSTEM_CLEAR_KEY;
+  }
+
+  return GetPlatformKeySystemByName(key_system_name);
+}
+
+}  // namespace media
+}  // namespace chromecast
diff --git a/chromecast/media/base/key_systems_common.h b/chromecast/media/base/key_systems_common.h
new file mode 100644
index 0000000..9c0906b
--- /dev/null
+++ b/chromecast/media/base/key_systems_common.h
@@ -0,0 +1,33 @@
+// 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.
+
+#ifndef CHROMECAST_MEDIA_BASE_KEY_SYSTEMS_COMMON_H_
+#define CHROMECAST_MEDIA_BASE_KEY_SYSTEMS_COMMON_H_
+
+#include <string>
+
+namespace chromecast {
+namespace media {
+
+extern const char kChromecastPlayreadyKeySystem[];
+
+enum CastKeySystem {
+  KEY_SYSTEM_NONE = 0,
+  KEY_SYSTEM_CLEAR_KEY,
+  KEY_SYSTEM_PLAYREADY,
+  KEY_SYSTEM_WIDEVINE
+};
+
+// Translates a key system string into a CastKeySystem, calling into the
+// platform for known key systems if needed.
+CastKeySystem GetKeySystemByName(const std::string& key_system_name);
+
+// Translates a platform-specific key system string into a CastKeySystem.
+// TODO(gunsch): Remove when prefixed EME is removed.
+CastKeySystem GetPlatformKeySystemByName(const std::string& key_system_name);
+
+}  // namespace media
+}  // namespace chromecast
+
+#endif  // CHROMECAST_MEDIA_BASE_KEY_SYSTEMS_COMMON_H_
diff --git a/chromecast/media/base/key_systems_common_simple.cc b/chromecast/media/base/key_systems_common_simple.cc
new file mode 100644
index 0000000..e6dbd02
--- /dev/null
+++ b/chromecast/media/base/key_systems_common_simple.cc
@@ -0,0 +1,15 @@
+// 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 "chromecast/media/base/key_systems_common.h"
+
+namespace chromecast {
+namespace media {
+
+CastKeySystem GetPlatformKeySystemByName(const std::string& key_system_name) {
+  return KEY_SYSTEM_NONE;
+}
+
+}  // namespace media
+}  // namespace chromecast
diff --git a/chromecast/media/media.gyp b/chromecast/media/media.gyp
index 0674a9e..3cebc65 100644
--- a/chromecast/media/media.gyp
+++ b/chromecast/media/media.gyp
@@ -3,8 +3,34 @@
 # found in the LICENSE file.
 
 {
+  'variables': {
+    'chromecast_branding%': 'Chromium',
+  },
   'targets': [
     {
+      'target_name': 'media_base',
+      'type': '<(component)',
+      'dependencies': [
+        '../../base/base.gyp:base',
+        '../../third_party/widevine/cdm/widevine_cdm.gyp:widevine_cdm_version_h',
+      ],
+      'sources': [
+        'base/key_systems_common.cc',
+        'base/key_systems_common.h',
+      ],
+      'conditions': [
+        ['chromecast_branding=="Chrome"', {
+          'dependencies': [
+            'internal/chromecast_internal.gyp:media_base_internal',
+          ],
+        }, {
+          'sources': [
+            'base/key_systems_common_simple.cc',
+          ],
+        }],
+      ],
+    },
+    {
       'target_name': 'cma_base',
       'type': '<(component)',
       'dependencies': [
diff --git a/chromecast/shell/renderer/DEPS b/chromecast/shell/renderer/DEPS
index ad0391c..161949b 100644
--- a/chromecast/shell/renderer/DEPS
+++ b/chromecast/shell/renderer/DEPS
@@ -1,4 +1,5 @@
 include_rules = [
+  "+components/cdm/renderer",
   "+content/public/renderer",
   "+third_party/WebKit/public/platform",
   "+third_party/WebKit/public/web",
diff --git a/chromecast/shell/renderer/cast_content_renderer_client.cc b/chromecast/shell/renderer/cast_content_renderer_client.cc
index e07e227..7d278ee 100644
--- a/chromecast/shell/renderer/cast_content_renderer_client.cc
+++ b/chromecast/shell/renderer/cast_content_renderer_client.cc
@@ -8,6 +8,7 @@
 
 #include "base/command_line.h"
 #include "base/memory/memory_pressure_listener.h"
+#include "chromecast/shell/renderer/key_systems_cast.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/renderer/render_view.h"
 #include "crypto/nss_util.h"
@@ -46,6 +47,8 @@ void CastContentRendererClient::RenderViewCreated(
 
 void CastContentRendererClient::AddKeySystems(
     std::vector<content::KeySystemInfo>* key_systems) {
+  AddChromecastKeySystems(key_systems);
+  AddChromecastPlatformKeySystems(key_systems);
 }
 
 }  // namespace shell
diff --git a/chromecast/shell/renderer/key_systems_cast.cc b/chromecast/shell/renderer/key_systems_cast.cc
new file mode 100644
index 0000000..8e9fe4d
--- /dev/null
+++ b/chromecast/shell/renderer/key_systems_cast.cc
@@ -0,0 +1,48 @@
+// 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 "chromecast/shell/renderer/key_systems_cast.h"
+
+#include <string>
+
+#include "base/command_line.h"
+#include "base/logging.h"
+#include "chromecast/media/base/key_systems_common.h"
+#include "components/cdm/renderer/widevine_key_systems.h"
+#include "content/public/common/eme_codec.h"
+
+#include "widevine_cdm_version.h" // In SHARED_INTERMEDIATE_DIR.
+
+namespace {
+
+#if defined(PLAYREADY_CDM_AVAILABLE)
+void AddKeySystemWithCodecs(
+    const std::string& key_system_name,
+    std::vector<content::KeySystemInfo>* concrete_key_systems) {
+  content::KeySystemInfo info(key_system_name);
+  info.supported_codecs = content::EME_CODEC_MP4_ALL;
+  concrete_key_systems->push_back(info);
+}
+#endif  // defined(PLAYREADY_CDM_AVAILABLE)
+
+}  // namespace
+
+namespace chromecast {
+namespace shell {
+
+void AddChromecastKeySystems(
+    std::vector<content::KeySystemInfo>* key_systems_info) {
+#if defined(WIDEVINE_CDM_AVAILABLE)
+  AddWidevineWithCodecs(cdm::WIDEVINE,
+                        content::EME_CODEC_MP4_ALL,
+                        key_systems_info);
+#endif
+
+#if defined(PLAYREADY_CDM_AVAILABLE)
+  AddKeySystemWithCodecs(kChromecastPlayreadyKeySystem, key_systems_info);
+#endif
+}
+
+}  // namespace shell
+}  // namespace chromecast
diff --git a/chromecast/shell/renderer/key_systems_cast.h b/chromecast/shell/renderer/key_systems_cast.h
new file mode 100644
index 0000000..7b0a9eb
--- /dev/null
+++ b/chromecast/shell/renderer/key_systems_cast.h
@@ -0,0 +1,25 @@
+// 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.
+
+#ifndef CHROMECAST_SHELL_RENDERER_KEY_SYSTEMS_CAST_H_
+#define CHROMECAST_SHELL_RENDERER_KEY_SYSTEMS_CAST_H_
+
+#include <vector>
+
+#include "content/public/renderer/key_system_info.h"
+
+namespace chromecast {
+namespace shell {
+
+void AddChromecastKeySystems(
+    std::vector<content::KeySystemInfo>* key_systems_info);
+
+// TODO(gunsch): Remove when prefixed EME is removed.
+void AddChromecastPlatformKeySystems(
+    std::vector<content::KeySystemInfo>* key_systems_info);
+
+}  // namespace shell
+}  // namespace chromecast
+
+#endif  // CHROMECAST_SHELL_RENDERER_KEY_SYSTEMS_CAST_H_
diff --git a/chromecast/shell/renderer/key_systems_cast_simple.cc b/chromecast/shell/renderer/key_systems_cast_simple.cc
new file mode 100644
index 0000000..752669f
--- /dev/null
+++ b/chromecast/shell/renderer/key_systems_cast_simple.cc
@@ -0,0 +1,16 @@
+// 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 "chromecast/shell/renderer/key_systems_cast.h"
+
+namespace chromecast {
+namespace shell {
+
+void AddChromecastPlatformKeySystems(
+    std::vector<content::KeySystemInfo>* key_systems_info) {
+  // Intentional no-op for public build.
+}
+
+}  // namespace shell
+}  // namespace chromecast