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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.
#ifndef CHROMECAST_MEDIA_CMA_IPC_STREAMER_AV_STREAMER_PROXY_H_
#define CHROMECAST_MEDIA_CMA_IPC_STREAMER_AV_STREAMER_PROXY_H_
#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/threading/thread_checker.h"
#include "media/base/audio_decoder_config.h"
#include "media/base/video_decoder_config.h"
namespace chromecast {
namespace media {
class CodedFrameProvider;
class DecoderBufferBase;
class MediaMessageFifo;
// AvStreamerProxy streams audio/video data from a coded frame provider
// to a media message fifo.
class AvStreamerProxy {
public:
AvStreamerProxy();
~AvStreamerProxy();
// AvStreamerProxy gets frames and audio/video config
// from the |frame_provider| and feed them into the |fifo|.
void SetCodedFrameProvider(scoped_ptr<CodedFrameProvider> frame_provider);
void SetMediaMessageFifo(scoped_ptr<MediaMessageFifo> fifo);
// Starts fetching A/V buffers.
void Start();
// Stops fetching A/V buffers and flush the pending buffers,
// invoking |flush_cb| when done.
void StopAndFlush(const base::Closure& flush_cb);
// Event invoked when some data have been read from the fifo.
// This means some data can now possibly be written into the fifo.
void OnFifoReadEvent();
private:
void RequestBufferIfNeeded();
void OnNewBuffer(const scoped_refptr<DecoderBufferBase>& buffer,
const ::media::AudioDecoderConfig& audio_config,
const ::media::VideoDecoderConfig& video_config);
void ProcessPendingData();
bool SendAudioDecoderConfig(const ::media::AudioDecoderConfig& config);
bool SendVideoDecoderConfig(const ::media::VideoDecoderConfig& config);
bool SendBuffer(const scoped_refptr<DecoderBufferBase>& buffer);
base::ThreadChecker thread_checker_;
scoped_ptr<CodedFrameProvider> frame_provider_;
// Fifo used to convey A/V configs and buffers.
scoped_ptr<MediaMessageFifo> fifo_;
// State.
bool is_running_;
// Indicates if there is a pending request to the coded frame provider.
bool pending_read_;
// Pending config & buffer.
// |pending_av_data_| is set as long as one of the pending audio/video
// config or buffer is valid.
bool pending_av_data_;
::media::AudioDecoderConfig pending_audio_config_;
::media::VideoDecoderConfig pending_video_config_;
scoped_refptr<DecoderBufferBase> pending_buffer_;
base::WeakPtr<AvStreamerProxy> weak_this_;
base::WeakPtrFactory<AvStreamerProxy> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(AvStreamerProxy);
};
} // namespace media
} // namespace chromecast
#endif // CHROMECAST_MEDIA_CMA_IPC_STREAMER_AV_STREAMER_PROXY_H_
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