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/*
* Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_G722_AUDIO_DECODER_G722_H_
#define WEBRTC_MODULES_AUDIO_CODING_CODECS_G722_AUDIO_DECODER_G722_H_
#include "webrtc/modules/audio_coding/codecs/audio_decoder.h"
typedef struct WebRtcG722DecInst G722DecInst;
namespace webrtc {
class AudioDecoderG722 final : public AudioDecoder {
public:
AudioDecoderG722();
~AudioDecoderG722() override;
bool HasDecodePlc() const override;
void Reset() override;
int PacketDuration(const uint8_t* encoded, size_t encoded_len) const override;
size_t Channels() const override;
protected:
int DecodeInternal(const uint8_t* encoded,
size_t encoded_len,
int sample_rate_hz,
int16_t* decoded,
SpeechType* speech_type) override;
private:
G722DecInst* dec_state_;
RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderG722);
};
class AudioDecoderG722Stereo final : public AudioDecoder {
public:
AudioDecoderG722Stereo();
~AudioDecoderG722Stereo() override;
void Reset() override;
protected:
int DecodeInternal(const uint8_t* encoded,
size_t encoded_len,
int sample_rate_hz,
int16_t* decoded,
SpeechType* speech_type) override;
size_t Channels() const override;
private:
// Splits the stereo-interleaved payload in |encoded| into separate payloads
// for left and right channels. The separated payloads are written to
// |encoded_deinterleaved|, which must hold at least |encoded_len| samples.
// The left channel starts at offset 0, while the right channel starts at
// offset encoded_len / 2 into |encoded_deinterleaved|.
void SplitStereoPacket(const uint8_t* encoded,
size_t encoded_len,
uint8_t* encoded_deinterleaved);
G722DecInst* dec_state_left_;
G722DecInst* dec_state_right_;
RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderG722Stereo);
};
} // namespace webrtc
#endif // WEBRTC_MODULES_AUDIO_CODING_CODECS_G722_AUDIO_DECODER_G722_H_
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