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/*

LodeWAV version 20071117



Copyright (c) 2007 Lode Vandevenne



This software is provided 'as-is', without any express or implied

warranty. In no event will the authors be held liable for any damages

arising from the use of this software.



Permission is granted to anyone to use this software for any purpose,

including commercial applications, and to alter it and redistribute it

freely, subject to the following restrictions:



    1. The origin of this software must not be misrepresented; you must not

    claim that you wrote the original software. If you use this software

    in a product, an acknowledgment in the product documentation would be

    appreciated but is not required.



    2. Altered source versions must be plainly marked as such, and must not be

    misrepresented as being the original software.



    3. This notice may not be removed or altered from any source

    distribution.

*/



#ifndef lodewav_h

#define lodewav_h



#include <vector>



//g++ *.cpp -Wall -Wextra -pedantic -ansi -O3



namespace LodeWAV

{



struct InfoWAV

{

  int channels; //amount of channels

  int samplerate; //samples per second

  int bitsPerSample; //bits per sample in the output wav

  

  InfoWAV(int channels, int samplerate, int bitsPerSample)

  {

    this->channels = channels;

    this->samplerate = samplerate;

    this->bitsPerSample = bitsPerSample;

  }

  

  InfoWAV() {}

};



//the input is always assumed to be audio data with an amplitude from -1.0 to +1.0

void encode(std::vector<unsigned char>& out, const std::vector<std::vector<double> >& in, const InfoWAV& info);



//same, but the value is stored in integers. Samples should be in the range -32768 to +32767

void encode(std::vector<unsigned char>& out, const std::vector<std::vector<int> >& in, const InfoWAV& info);

/*

return value is error code

0: no error

10: file too small to contain RIFF header and minimum required chunks

11: no RIFF header

12: no WAVE in RIFF header

13: too small format chunk

14: compression not supported, only wFormatTag 1 (PCM) is supported

15: there must come a format chunk before the data chunk

16: not enough bytes to read chunk type & size of next chunk

17: not enough bytes to read for the full chunksize

*/

//in the output, +1.0 is max amplitude, -1.0 is min amplitude

int decode(std::vector<std::vector<double> >& out, InfoWAV& info, const std::vector<unsigned char>& in);



//same, but the value is stored in integers. Samples will be in the range -32768 to +32767

int decode(std::vector<std::vector<int> >& out, InfoWAV& info, const std::vector<unsigned char>& in);



} //end of namespace LodeWAV



#endif //lodewav_h