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// 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 "base/callback.h"
#include "base/macros.h"
#include "media/base/media_export.h"
namespace media {
class Decryptor;
// An interface representing the context that a media player needs from a
// content decryption module (CDM) to decrypt (and decode) encrypted buffers.
// This is used to pass the CDM to the media player (e.g. SetCdm()).
class MEDIA_EXPORT CdmContext {
// Indicates an invalid CDM ID. See GetCdmId() for details.
static const int kInvalidCdmId;
virtual ~CdmContext();
// Gets the Decryptor object associated with the CDM. Returns nullptr if the
// CDM does not support a Decryptor (i.e. platform-based CDMs where decryption
// occurs implicitly along with decoding). The returned object is only
// guaranteed to be valid during the CDM's lifetime.
virtual Decryptor* GetDecryptor() = 0;
// Returns an ID that can be used to find a remote CDM, in which case this CDM
// serves as a proxy to the remote one. Returns kInvalidCdmId when remote CDM
// is not supported (e.g. this CDM is a local CDM).
virtual int GetCdmId() const = 0;
// Returns a unique class identifier. Some subclasses override and use this
// method to provide safe down-casting to their type.
virtual void* GetClassIdentifier() const;
// Callback to notify that the CdmContext has been completely attached to
// the media pipeline. Parameter indicates whether the operation succeeded.
typedef base::Callback<void(bool)> CdmAttachedCB;
// A dummy implementation of CdmAttachedCB.
MEDIA_EXPORT void IgnoreCdmAttached(bool success);
} // namespace media