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// Copyright 2015 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 MEDIA_MOJO_SERVICES_MOJO_DECRYPTOR_H_
#define MEDIA_MOJO_SERVICES_MOJO_DECRYPTOR_H_
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/threading/thread_checker.h"
#include "media/base/decryptor.h"
#include "media/mojo/interfaces/decryptor.mojom.h"
#include "mojo/public/cpp/bindings/binding.h"
#include "mojo/public/cpp/system/data_pipe.h"
namespace media {
// A Decryptor implementation based on interfaces::DecryptorPtr.
// This class is single threaded. The |remote_decryptor| is connected before
// being passed to MojoDecryptor, but it is bound to the thread MojoDecryptor
// lives on the first time it is used in this class.
class MojoDecryptor : public Decryptor {
public:
explicit MojoDecryptor(interfaces::DecryptorPtr remote_decryptor);
~MojoDecryptor() final;
// Decryptor implementation.
void RegisterNewKeyCB(StreamType stream_type,
const NewKeyCB& key_added_cb) final;
void Decrypt(StreamType stream_type,
const scoped_refptr<DecoderBuffer>& encrypted,
const DecryptCB& decrypt_cb) final;
void CancelDecrypt(StreamType stream_type) final;
void InitializeAudioDecoder(const AudioDecoderConfig& config,
const DecoderInitCB& init_cb) final;
void InitializeVideoDecoder(const VideoDecoderConfig& config,
const DecoderInitCB& init_cb) final;
void DecryptAndDecodeAudio(const scoped_refptr<DecoderBuffer>& encrypted,
const AudioDecodeCB& audio_decode_cb) final;
void DecryptAndDecodeVideo(const scoped_refptr<DecoderBuffer>& encrypted,
const VideoDecodeCB& video_decode_cb) final;
void ResetDecoder(StreamType stream_type) final;
void DeinitializeDecoder(StreamType stream_type) final;
// Called when keys have changed and an additional key is available.
void OnKeyAdded();
private:
// Called when a buffer is decrypted.
void OnBufferDecrypted(const DecryptCB& decrypt_cb,
interfaces::Decryptor::Status status,
interfaces::DecoderBufferPtr buffer);
void OnAudioDecoded(const AudioDecodeCB& audio_decode_cb,
interfaces::Decryptor::Status status,
mojo::Array<interfaces::AudioBufferPtr> audio_buffers);
void OnVideoDecoded(const VideoDecodeCB& video_decode_cb,
interfaces::Decryptor::Status status,
interfaces::VideoFramePtr video_frame);
// To pass DecoderBuffers to and from the MojoDecryptorService, 2 data pipes
// are required (one each way). At initialization both pipes are created,
// and then the handles are passed to the MojoDecryptorService.
void CreateDataPipes();
// Helper functions to write and read a DecoderBuffer.
interfaces::DecoderBufferPtr TransferDecoderBuffer(
const scoped_refptr<DecoderBuffer>& buffer);
scoped_refptr<DecoderBuffer> ReadDecoderBuffer(
interfaces::DecoderBufferPtr buffer);
base::ThreadChecker thread_checker_;
interfaces::DecryptorPtr remote_decryptor_;
// DataPipes for serializing the data section of DecoderBuffer into/from.
mojo::ScopedDataPipeProducerHandle producer_handle_;
mojo::ScopedDataPipeConsumerHandle consumer_handle_;
NewKeyCB new_audio_key_cb_;
NewKeyCB new_video_key_cb_;
base::WeakPtrFactory<MojoDecryptor> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(MojoDecryptor);
};
} // namespace media
#endif // MEDIA_MOJO_SERVICES_MOJO_DECRYPTOR_H_