Move EME code out of WebMediaPlayerImpl.

content/renderer/media/crypto/encrypted_media_support.h

+// 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 CONTENT_RENDERER_MEDIA_CRYPTO_ENCRYPTED_MEDIA_SUPPORT_H_
+#define CONTENT_RENDERER_MEDIA_CRYPTO_ENCRYPTED_MEDIA_SUPPORT_H_
+
+#include "media/base/decryptor.h"
+#include "media/base/demuxer.h"
+#include "third_party/WebKit/public/platform/WebMediaPlayer.h"
+
+namespace blink {
+class WebContentDecryptionModule;
+class WebContentDecryptionModuleResult;
+class WebLocalFrame;
+class WebMediaPlayerClient;
+class WebString;
+}
+
+namespace content {
+
+class EncryptedMediaSupport {

[xhwang, 2014/08/22 20:52:51]

This seems to be an interface with only one implementation. In that case can we
drop that interface?

[acolwell GONE FROM CHROMIUM, 2014/08/22 21:09:31]

I need the interface so that when I move WMPI, I don't need to pull in all of
EMSI's dependencies with it. When WMPI moves to media/blink so will this
interface, but EMSI will stay in content/renderer/media. Since this interface is
abstract I can still use WMPI in Mojo w/o enabling encrypted media support. Also
one can imagine creating a new implementation of this interface that integrates
with the Mojo world.

+ public:
+  static scoped_ptr<EncryptedMediaSupport> create(
+      blink::WebMediaPlayerClient* client);

[xhwang, 2014/08/22 20:52:51]

Can this return NULL? It seems so based on the new code in WMPI. We should
document this in that case.

[acolwell GONE FROM CHROMIUM, 2014/08/22 21:09:31]

Yes. Done.

+
+  EncryptedMediaSupport() { }
+  virtual ~EncryptedMediaSupport();
+
+  virtual blink::WebMediaPlayer::MediaKeyException generateKeyRequest(

[xhwang, 2014/08/22 20:52:51]

This is Chromium code, use Chromium style function name like GenerateKeyRequest?

[acolwell GONE FROM CHROMIUM, 2014/08/22 21:09:31]

Done.

+      blink::WebLocalFrame* frame,
+      const blink::WebString& key_system,
+      const unsigned char* init_data,
+      unsigned init_data_length) = 0;
+
+  virtual blink::WebMediaPlayer::MediaKeyException addKey(
+      const blink::WebString& key_system,
+      const unsigned char* key,
+      unsigned key_length,
+      const unsigned char* init_data,
+      unsigned init_data_length,
+      const blink::WebString& session_id) = 0;
+
+  virtual blink::WebMediaPlayer::MediaKeyException cancelKeyRequest(
+      const blink::WebString& key_system,
+      const blink::WebString& session_id) = 0;
+
+  virtual void setContentDecryptionModule(
+      blink::WebContentDecryptionModule* cdm) = 0;
+  virtual void setContentDecryptionModule(
+      blink::WebContentDecryptionModule* cdm,
+      blink::WebContentDecryptionModuleResult result) = 0;
+  virtual void setContentDecryptionModuleSync(
+      blink::WebContentDecryptionModule* cdm) = 0;
+
+  virtual media::Demuxer::NeedKeyCB CreateNeedKeyCB() = 0;
+  virtual media::SetDecryptorReadyCB CreateSetDecryptorReadyCB() = 0;
+  virtual void OnDecryptError() = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(EncryptedMediaSupport);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_MEDIA_CRYPTO_ENCRYPTED_MEDIA_SUPPORT_H_