Populate canPlayType to renderer

chrome/common/encrypted_media_messages_android.h

+// 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.
+
+// IPC messages for EME on android.
+// Multiply-included message file, hence no include guard.
+
+#include <string>
+#include <vector>
+
+#include "ipc/ipc_message_macros.h"
+
+// Singly-included section for enums and custom IPC traits.
+#ifndef CHROME_COMMON_ENCRYPTED_MEDIA_MESSAGES_ANDROID_H
+#define CHROME_COMMON_ENCRYPTED_MEDIA_MESSAGES_ANDROID_H
+
+namespace android {
+
+// Defines bitmask values used to specify supported codecs.
+// Each value represents a codec within a specific container.
+enum SupportedCodecs {
+  NO_SUPPORTED_CODECS = 0,
+  WEBM_VP8_AND_VORBIS = 1 << 0,
+  MP4_AAC = 1 << 1,
+  MP4_AVC1 = 1 << 2,
+};
+
+struct SupportedKeySystemRequest {
+  SupportedKeySystemRequest();
+  ~SupportedKeySystemRequest();
+
+  // Key system UUID.
+  std::vector<uint8> uuid;
+  // Bitmask of requested codecs.
+  SupportedCodecs requested_codecs;

[ddorwin, 2013/09/18 03:58:31]

nit: requested_ is redundant in the type (and hopefully names of instances of
this struct).

[qinmin, 2013/09/18 05:08:21]

Done.

+};
+
+struct SupportedKeySystemResponse {
+  SupportedKeySystemResponse();
+  ~SupportedKeySystemResponse();
+
+  // Key system UUID.
+  std::vector<uint8> uuid;
+  // Bitmask of supported compositing codecs.
+  SupportedCodecs compositing_codecs;
+  // Bitmask of supported non-compositing codecs.
+  SupportedCodecs non_compositing_codecs;
+};
+
+}  // namespace android
+
+#endif  // CHROME_COMMON_RENDER_MESSAGES_H_
+
+
+#define IPC_MESSAGE_START EncryptedMediaMsgStart
+
+IPC_ENUM_TRAITS(android::SupportedCodecs)
+
+IPC_STRUCT_TRAITS_BEGIN(android::SupportedKeySystemRequest)
+  IPC_STRUCT_TRAITS_MEMBER(uuid)
+  IPC_STRUCT_TRAITS_MEMBER(requested_codecs)
+IPC_STRUCT_TRAITS_END()
+
+IPC_STRUCT_TRAITS_BEGIN(android::SupportedKeySystemResponse)
+  IPC_STRUCT_TRAITS_MEMBER(uuid)
+  IPC_STRUCT_TRAITS_MEMBER(compositing_codecs)
+  IPC_STRUCT_TRAITS_MEMBER(non_compositing_codecs)
+IPC_STRUCT_TRAITS_END()
+
+
+// Messages sent from the renderer to the browser.
+
+// Synchronously get a list of supported EME key systems.
+IPC_SYNC_MESSAGE_CONTROL1_1(
+    ChromeViewHostMsg_GetSupportedKeySystems,
+    android::SupportedKeySystemRequest /* key system information request */,
+    android::SupportedKeySystemResponse /* key system information response */)