105 lines
3.0 KiB
C++
105 lines
3.0 KiB
C++
/* Copyright(C) 2007-2018 VoIP objects (voipobjects.com)
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef __AUDIO_RESAMPLER_H
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#define __AUDIO_RESAMPLER_H
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#ifdef USE_WEBRTC_RESAMPLER
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# include "signal_processing_library/signal_processing_library.h"
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#endif
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#include <vector>
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#include <memory>
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#include <map>
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namespace Audio
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{
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class SpeexResampler
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{
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public:
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SpeexResampler();
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~SpeexResampler();
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void start(int channels, int sourceRate, int destRate);
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void stop();
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size_t processBuffer(const void* source, size_t sourceLength, size_t& sourceProcessed,
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void* dest, size_t destCapacity);
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int sourceRate();
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int destRate();
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size_t getDestLength(size_t sourceLen);
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size_t getSourceLength(size_t destLen);
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// Returns instance + speex encoder size in bytes
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size_t getSize() const;
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protected:
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void* mContext;
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int mErrorCode;
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int mSourceRate,
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mDestRate,
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mChannels;
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short mLastSample;
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};
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typedef SpeexResampler Resampler;
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typedef std::shared_ptr<Resampler> PResampler;
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class ChannelConverter
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{
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public:
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static int stereoToMono(const void* source, int sourceLength, void* dest, int destLength);
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static int monoToStereo(const void* source, int sourceLength, void* dest, int destLength);
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};
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// Operates with AUDIO_CHANNELS number of channels
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class UniversalResampler
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{
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public:
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UniversalResampler();
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~UniversalResampler();
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size_t resample(int sourceRate, const void* sourceBuffer, size_t sourceLength, size_t& sourceProcessed,
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int destRate, void* destBuffer, size_t destCapacity);
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size_t getDestLength(int sourceRate, int destRate, size_t sourceLength);
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size_t getSourceLength(int sourceRate, int destRate, size_t destLength);
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protected:
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typedef std::pair<int, int> RatePair;
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typedef std::map<RatePair, PResampler> ResamplerMap;
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ResamplerMap mResamplerMap;
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PResampler findResampler(int sourceRate, int destRate);
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void preload();
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};
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#ifdef USE_WEBRTC_RESAMPLER
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// n*10 milliseconds buffers required!
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class Resampler48kTo16k
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{
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public:
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Resampler48kTo16k();
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~Resampler48kTo16k();
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int process(const void* source, int sourceLen, void* dest, int destLen);
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protected:
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WebRtc_Word32 mTemp[496];
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WebRtcSpl_State48khzTo16khz mContext;
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};
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class Resampler16kto48k
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{
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public:
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Resampler16kto48k();
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~Resampler16kto48k();
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int process(const void* source, int sourceLen, void* dest, int destLen);
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protected:
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WebRtc_Word32 mTemp[336];
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WebRtcSpl_State16khzTo48khz mContext;
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};
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#endif
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} // end of namespace
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#endif
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