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// 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.
#ifndef MEDIA_CAST_AUDIO_RECEIVER_AUDIO_DECODER_H_
#define MEDIA_CAST_AUDIO_RECEIVER_AUDIO_DECODER_H_
#include "base/callback.h"
#include "base/synchronization/lock.h"
#include "media/cast/cast_config.h"
#include "media/cast/cast_environment.h"
#include "media/cast/framer/cast_message_builder.h"
#include "media/cast/framer/frame_id_map.h"
#include "media/cast/rtp_receiver/rtp_receiver_defines.h"
namespace webrtc {
class AudioCodingModule;
}
namespace media {
namespace cast {
typedef std::map<uint32, uint32> FrameIdRtpTimestampMap;
// Thread safe class.
class AudioDecoder {
public:
AudioDecoder(scoped_refptr<CastEnvironment> cast_environment,
const AudioReceiverConfig& audio_config,
RtpPayloadFeedback* incoming_payload_feedback);
virtual ~AudioDecoder();
// Extract a raw audio frame from the decoder.
// Set the number of desired 10ms blocks and frequency.
// Should be called from the cast audio decoder thread; however that is not
// required.
bool GetRawAudioFrame(int number_of_10ms_blocks,
int desired_frequency,
PcmAudioFrame* audio_frame,
uint32* rtp_timestamp);
// Insert an RTP packet to the decoder.
// Should be called from the main cast thread; however that is not required.
void IncomingParsedRtpPacket(const uint8* payload_data,
size_t payload_size,
const RtpCastHeader& rtp_header);
bool TimeToSendNextCastMessage(base::TimeTicks* time_to_send);
void SendCastMessage();
private:
scoped_refptr<CastEnvironment> cast_environment_;
// The webrtc AudioCodingModule is threadsafe.
scoped_ptr<webrtc::AudioCodingModule> audio_decoder_;
FrameIdMap frame_id_map_;
CastMessageBuilder cast_message_builder_;
base::Lock lock_;
bool have_received_packets_;
FrameIdRtpTimestampMap frame_id_rtp_timestamp_map_;
uint32 last_played_out_timestamp_;
DISALLOW_COPY_AND_ASSIGN(AudioDecoder);
};
} // namespace cast
} // namespace media
#endif // MEDIA_CAST_AUDIO_RECEIVER_AUDIO_DECODER_H_
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