al_AudioIOData.hpp

#ifndef INCLUDE_AL_AUDIODATA_IO_HPP
#define INCLUDE_AL_AUDIODATA_IO_HPP
 
/*  Allocore --
        Multimedia / virtual environment application class library
 
        Copyright (C) 2009. AlloSphere Research Group, Media Arts & Technology,
   UCSB. Copyright (C) 2012. The Regents of the University of California. All
   rights reserved.
 
        Redistribution and use in source and binary forms, with or without
        modification, are permitted provided that the following conditions are
   met:
 
                Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
 
                Redistributions in binary form must reproduce the above
   copyright notice, this list of conditions and the following disclaimer in the
                documentation and/or other materials provided with the
   distribution.
 
                Neither the name of the University of California nor the names
   of its contributors may be used to endorse or promote products derived from
                this software without specific prior written permission.
 
        THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
   IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
   OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 
        File description:
        An interface to low-level audio device streams
 
        File author(s):
        Lance Putnam, 2010, putnam.lance@gmail.com
        Andres Cabrera 2017 mantaraya36@gmail.com
*/
 
#include <cassert>
#include <cinttypes>
#include <cstdio>
#include <cstring>
 
namespace al {
 
template <class T>
static void deleteBuf(T*& buf) {
  delete[] buf;
  buf = 0;
}
 
template <class T>
static int resize(T*& buf, int n) {
  deleteBuf(buf);
  buf = new T[n];
  return n;
}
 
template <class T>
static void zero(T* buf, unsigned int n) {
  memset(buf, 0, n * sizeof(T));
}
 
template <class T>
static void deinterleave(T* dst, const T* src, int numFrames, int numChannels) {
  int numSamples = numFrames * numChannels;
  for (int c = 0; c < numChannels; c++) {
    for (int i = c; i < numSamples; i += numChannels) {
      *dst++ = src[i];
    }
  }
}
 
template <class T>
static void interleave(T* dst, const T* src, int numFrames, int numChannels) {
  int numSamples = numFrames * numChannels;
  for (int c = 0; c < numChannels; c++) {
    for (int i = c; i < numSamples; i += numChannels) {
      dst[i] = *src++;
    }
  }
}
 
template <class T>
static void interleave(T *dst, T **src, int numFrames, int numChannels) {
  int numSamples = numFrames * numChannels;
  for (int c = 0; c < numChannels; c++) {
    float *channelSrc = src[c];
    for (int i = c; i < numSamples; i += numChannels) {
      dst[i] = *channelSrc++;
    }
  }
}
 
class AudioDeviceInfo {
 public:
  enum StreamMode {
    INPUT = 1, 
    OUTPUT = 2 
  };
 
  AudioDeviceInfo(int deviceNum);
 
  //    /// @param[in] nameKeyword  Keyword to search for in device name
  //    /// @param[in] stream       Whether to search for input and/or
  // output
  // devices
  //    AudioDeviceInfo(const std::string& nameKeyword, StreamMode stream =
  // StreamMode(INPUT | OUTPUT)) : mID(-1) {}
 
  virtual ~AudioDeviceInfo() {}
 
  virtual bool valid() const;        
  virtual int id() const;            
  virtual const char* name() const;  
  virtual int channelsInMax()
      const;  
  virtual int channelsOutMax()
      const;  
  virtual double defaultSampleRate() const;  
 
  virtual void setID(int iD);        
  virtual void setName(char* name);  
  virtual void setChannelsInMax(
      int num);  
  virtual void setChannelsOutMax(
      int num);  
  virtual void setDefaultSampleRate(double rate);  
 
  virtual bool hasInput() const = 0;   
  virtual bool hasOutput() const = 0;  
 
  virtual void print()
      const = 0;  
 
 protected:
  int mID{-1};
  char mName[128];
  int mChannelsInMax{0};
  int mChannelsOutMax{0};
  double mDefaultSampleRate{0};
  bool mValid{false};
};
 
inline AudioDeviceInfo::StreamMode operator|(
    const AudioDeviceInfo::StreamMode& a,
    const AudioDeviceInfo::StreamMode& b) {
  return static_cast<AudioDeviceInfo::StreamMode>(+a | +b);
}
 
class AudioIOData {
 public:
  AudioIOData(void* user = nullptr);
 
  virtual ~AudioIOData();
 
  typedef enum { PORTAUDIO, RTAUDIO, DUMMY } Backend;
 
  bool operator()() const { return (++mFrame) < framesPerBuffer(); }
 
  unsigned int frame() const { return mFrame; }
 
  float& bus(unsigned int chan) const { return bus(chan, frame()); }
 
  float& bus(unsigned int chan, unsigned int frame) const;
 
  float* busBuffer(unsigned int chan = 0) const { return &bus(chan, 0); }
 
  const float& in(unsigned int chan) const { return in(chan, frame()); }
 
  const float& in(unsigned int chan, unsigned int frame) const;
 
  const float* inBuffer(unsigned int chan = 0) const { return &in(chan, 0); }
 
  float& out(unsigned int chan) const { return out(chan, frame()); }
 
  float& out(unsigned int chan, unsigned int frame) const;
 
  float* outBuffer(unsigned int chan = 0) const { return &out(chan, 0); }
 
  void sum(float v, unsigned int chan) const { out(chan) += v; }
 
  void sum(float v, unsigned int ch1, unsigned int ch2) const {
    sum(v, ch1);
    sum(v, ch2);
  }
 
  float& temp(unsigned int frame) const;
 
  float* tempBuffer() const { return &temp(0); }
 
  void* user() const { return mUser; }  
 
  template <class UserDataType>
  UserDataType& user() const {
    return *(static_cast<UserDataType*>(mUser));
  }
 
  int channels(bool forOutput) const;
  unsigned int channelsIn() const;  
  unsigned int channelsOut()
      const;  
  unsigned int channelsBus() const;  
  uint64_t framesPerBuffer() const;  
  double framesPerSecond() const;    
  double fps() const { return framesPerSecond(); }
  double secondsPerBuffer() const;  
 
  void user(void* v) { mUser = v; }  
  void frame(unsigned int v) {
    assert(v >= 0);
    mFrame = v - 1;
  }                
  void zeroBus();  
  void zeroOut();  
 
 
  virtual void channels(int num, bool forOutput);
 
  void channelsIn(int n);             
  void channelsOut(int n);            
  virtual void channelsBus(int num);  
 
  virtual void framesPerSecond(double v);  
  virtual void framesPerBuffer(
      unsigned int n);  
 
  AudioIOData& gain(float v) {
    mGain = v;
    return *this;
  }
  bool usingGain() const { return mGain != 1.f || mGainPrev != 1.f; }
 
  float mGain, mGainPrev;
 
 protected:
  void* mUser;  // User specified data
  mutable unsigned int mFrame;
  unsigned int mFramesPerBuffer;
  double mFramesPerSecond;
  float *mBufI, *mBufO, *mBufB;      // input, output, and aux buffers
  float* mBufT;                      // temporary one channel buffer
  unsigned int mNumI, mNumO, mNumB;  // input, output, and aux channels
 
  void resizeBuffer(bool forOutput);
 
 private:
  void operator=(const AudioIOData&);  // Disallow copy
};
 
class AudioCallback {
 public:
  virtual ~AudioCallback() {}
  virtual void onAudioCB(AudioIOData& io) = 0;  
};
 
//==============================================================================
inline float& AudioIOData::bus(unsigned int c, unsigned int f) const {
  assert(c < mNumB);
  assert(f < framesPerBuffer());
  return mBufB[c * framesPerBuffer() + f];
}
 
inline const float& AudioIOData::in(unsigned int c, unsigned int f) const {
  assert(c < mNumI);
  assert(f < framesPerBuffer());
  return mBufI[c * framesPerBuffer() + f];
}
 
inline float& AudioIOData::out(unsigned int c, unsigned int f) const {
  assert(c < mNumO);
  assert(f < framesPerBuffer());
  return mBufO[c * framesPerBuffer() + f];
}
inline float& AudioIOData::temp(unsigned int f) const { return mBufT[f]; }
 
}  // namespace al
 
#endif