Populate canPlayType to renderer

chrome/renderer/media/encrypted_media_utils_android.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/encrypted_media_utils_android.h"
+
+#include <string>
+
+#include "chrome/common/encrypted_media_messages_android.h"
+
+namespace chrome {
+
+// TODO(qinmin): the conversion is very rough and incomplete. There are multiple
+// container type for each codec.
+const std::string CodecTypeToContainerType(

[ddorwin, 2013/09/16 17:58:10]

This is already handled in AddWidevineWithCodecs().

[qinmin, 2013/09/17 21:26:23]

Done.

+    const std::string& codec_type) {
+  if (codec_type == "mp4v")

[ddorwin, 2013/09/16 17:58:10]

Most of Chrome uses AVC1. We should try to use the same values as the rest of
Chrome as much as possible, meaning we should convert at the lower levels.

[qinmin, 2013/09/17 21:26:23]

Done.

+    return "video/mp4";
+  if (codec_type == "avc1")
+    return "video/mpeg";
+  if (codec_type == "vp8")
+    return "video/webm";
+  if (codec_type == "vp9")
+    return "video/webm";
+  if (codec_type == "mp4a")
+    return "audio/mp4";
+  if (codec_type == "mp3")
+    return "audio/mpeg";
+  if (codec_type == "vorbis")
+    return "audio/webm";
+  return std::string();
+}
+
+content::KeySystemInfo SupportedKeySystemToKeySystemInfo(

[ddorwin, 2013/09/16 17:58:10]

As mentioned earlier, I don't think we need to convert entire structs.

[qinmin, 2013/09/17 21:26:23]

removed
On 2013/09/16 17:58:10, ddorwin wrote:

+    const SupportedKeySystem& key_system) {
+  content::KeySystemInfo key_system_info(key_system.key_system);
+  key_system_info.uuid = key_system.uuid;
+  key_system_info.parent_key_system = key_system.parent_key_system;
+  for (unsigned i = 0; i < key_system.codecs.size(); ++i) {
+    std::string container_type = CodecTypeToContainerType(key_system.codecs[i]);
+    if (!container_type.empty()) {
+      key_system_info.supported_types.push_back(
+          content::KeySystemInfo::ContainerCodecsPair(
+              container_type, key_system.codecs[i]));
+    }
+  }
+  key_system_info.video_composition_enabled =
+      key_system.video_composition_enabled;
+  return key_system_info;
+}
+
+}  // namespace chrome