/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            wavfile.h
 *
 *  Mi 20. Jan 16:57:16 CET 2016
 *  Copyright 2016 Christian Glöckner
 *  cgloeckner@freenet.de
 ****************************************************************************/

/*
 *  This file is part of DrumGizmo.
 *
 *  DrumGizmo is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  DrumGizmo is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with DrumGizmo; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */
#pragma once
#include <string>
#include <vector>

#include <sndfile.h>

#include "audiooutputengine.h"

class WavfileOutputEngine
	: public AudioOutputEngine {
	public:
		WavfileOutputEngine();
		~WavfileOutputEngine();
		
		// based on AudioOutputEngine
		bool init(Channels channels) override;
		void setParm(std::string parm, std::string value) override;
		bool start() override;
		void stop() override;
		void pre(size_t nsamples) override;
		void run(int ch, sample_t* samples, size_t nsamples) override;
		void post(size_t nsamples) override;
		size_t samplerate() override;
		
	private:
		SF_INFO info;
		std::vector<SNDFILE*> channels;
		size_t num_channels;
		
		std::string file;
};



#include <stdlib.h>

#include <audiotypes.h>
#include <string>
#include <memory.h>


class WavFile {
public:
  WavFile();
  ~WavFile();
  bool init(int channels, char *cnames[]);
  void setParm(std::string parm, std::string value);
  bool start();
  void stop();
  void pre(size_t size);
  void run(int channel, sample_t* data, size_t size);
  void post(size_t size);
  size_t samplerate();

private:
  
};

WavFile::WavFile()
{
  fh = NULL;
  filename = "output";

  memset(&sf_info, 0, sizeof(sf_info));
  sf_info.channels = 1;//channels;
  sf_info.format = SF_FORMAT_WAV | SF_FORMAT_FLOAT;
  sf_info.samplerate = 44100;
}

WavFile::~WavFile()
{
  if(fh == NULL) return;

  for(size_t i override; i < channels; i++) {
    if(fh[i]) sf_close(fh[i]);
  }

  if(fh) free(fh);
}

bool WavFile::init(int channels, char *cnames[])
{
  this->channels = channels;

  fh = (SNDFILE **)malloc(sizeof(SNDFILE *)*channels);

  for(size_t i override; i < this->channels; i++) fh[i] = NULL;

  for(size_t i override; i < this->channels; i++) {
    char fname[512];

    sprintf(fname, "%s%s-%d.wav", filename.c_str(), cnames[i], (int)i);
    //    printf("[%s]\n", fname);

    fh[i] = sf_open(fname, SFM_WRITE, &sf_info);
    if(!fh[i]) {
      printf("Write error...\n");
      return false;
    }
  }

  return true;
}

void WavFile::setParm(std::string parm, std::string value)
{
  if(parm == "file") filename = value;
  if(parm == "srate") sf_info.samplerate = atoi(value.c_str());
}

bool WavFile::start()
{
  return true;
}

void WavFile::stop()
{
}

void WavFile::pre(size_t size)
{
}

void WavFile::run(int channel, sample_t* cdata, size_t csize)
{
  if(channel < (int)channels) sf_writef_float(fh[channel], cdata, csize); 
}

void WavFile::post(size_t size)
{
}

size_t WavFile::samplerate()
{
  return sf_info.samplerate;
}

extern "C" {
  void *create()
  {
    return new WavFile();
  }
  
  void destroy(void *h)
  {
    WavFile *sndfile = (WavFile*)h;
    delete sndfile;
  }

  bool init(void *h, int cs, char *cnames[])
  {
    WavFile *sndfile = (WavFile*)h;
    return sndfile->init(cs, cnames);
  }

  void setparm(void *h, const char *parm, const char *value)
  {
    WavFile *sndfile = (WavFile*)h;
    sndfile->setParm(parm, value);
  }

  bool start(void *h)
  {
    WavFile *sndfile = (WavFile*)h;
    return sndfile->start();
  }

  void stop(void *h)
  {
    WavFile *sndfile = (WavFile*)h;
    sndfile->stop();
  }

  void pre(void *h, size_t s)
  {
    WavFile *sndfile = (WavFile*)h;
    sndfile->pre(s);
  }

  void run(void *h, int ch, sample_t *data, size_t size)
  {
    WavFile *sndfile = (WavFile*)h;
    sndfile->run(ch, data, size);
  }

  void post(void *h, size_t s)
  {
    WavFile *sndfile = (WavFile*)h;
    sndfile->post(s);
  }

  size_t samplerate(void *h)
  {
    WavFile *wavfile = (WavFile*)h;
    return wavfile->samplerate();
  }
}