#include "AmRingTone.h"
#include <math.h>

#include "log.h"

#define PI 3.14159

AmRingTone::AmRingTone(int length, int on, int off, int f, int f2)
    : AmAudio(),
      length(length),
      on_period(on), 
      off_period(off),
      freq(f),freq2(f2)
{}

AmRingTone::~AmRingTone()
{}

int AmRingTone::read(unsigned int user_ts, unsigned int size)
{
    int t = user_ts % ((on_period + off_period)<<3);

    if(length < 0)
	return -1;

    if(t >= on_period<<3){

	memset((unsigned char*)samples,0,size);

	return size;
    }

    short* s = (short*)((unsigned char*)samples);
    for(unsigned int i=0; i<PCM16_B2S(size); i++, s++, t++){

	if(t < on_period<<3){
	    float fs = sin((float(t*freq)/8000.0)*2.0*PI)*15000.0;
	    if(freq2 != 0)
		fs += sin((float(t*freq2)/8000.0)*2.0*PI)*15000.0;
	    *s = (short)(fs);
	}
	else
	    *s = 0;

    }

    if(length != 0){
	length -= PCM16_B2S(size) / 8;
	if(!length)
	    length--;
    }

    return size;
}

int AmRingTone::write(unsigned int user_ts, unsigned int size)
{
    return -1;
}