/*
* libZPlay example
*
* Play test.mp3 to sound card output,display FFT graph,
* cut all from 5000 Hz to 10000 Hz using equalizer
*
*/

#include <windows.h>
#include <stdio.h>
#include <conio.h>

#include "libzplay.h"

using namespace libZPlay;

int main(int argc, char **argv)
{
    printf("Playing test.mp3\n\nPress q to end\n\n");

    // create class instance using class factory.
    ZPlay *player = CreateZPlay();

    // open file
    int result = player->OpenFile("test.mp3", sfAutodetect);
    if(result == 0)
    {
        // display error message
        printf("Error: %s\n", player->GetError());
        player->Release();
        return 0;
    }

    // get song length
    TStreamInfo info;
    player->GetStreamInfo(&info);

    printf("Length: %02u:%02u:%02u:%03u\n\n", info.Length.hms.hour, 
                                                info.Length.hms.minute,
                                                info.Length.hms.second,
                                                info.Length.hms.millisecond);


    // we will cut all from 5000 Hz to 10000 Hz,
    // so we need to create custom equalizer bands because
    // we need exact frequency bounds.
    
    // band0: 0 - 5000 Hz
    // band1: 5000 - 10000 Hz
    // band2: 10000 - samplerate/2
    
    // define 2 points to devide frequancy range into 3 bands

    // band:    0      1       2
    // range: 0 - 5000 - 10000 - samplerate/2

    int nFreqPoint[2] = {5000, 10000};
    player->SetEqualizerPoints(nFreqPoint, 2);
    
    // now we need to lower gain of band1 for 100 decibels
    // band gain is expressed in millidecibels, thousandth of decibel
    player->SetEqualizerBandGain(1, -100000); 

    // enable equalizer
    player->EnableEqualizer(1);



    // set graph type to AREA, left channel on top
    player->SetFFTGraphParam(gpGraphType, gtAreaLeftOnTop);
    // set linear scale
    player->SetFFTGraphParam(gpHorizontalScale, gsLinear);

    // start playing
    player->Play();

    // display position and wait for song end
    while(1)
    {
        // check key press
        if(kbhit())
        {
            int a = getch();
            if(a == 'q' || a == 'Q')
                break; // end program if Q key is pressed
        }

        // get stream status to check if song is still playing
        TStreamStatus status;
        player->GetStatus(&status); 
        if(status.fPlay == 0)
            break; // exit checking loop

        // get current position
        TStreamTime pos;
        player->GetPosition(&pos);
        // display position
        printf("Pos: %02u:%02u:%02u:%03u\r", pos.hms.hour, pos.hms.minute, pos.hms.second, pos.hms.millisecond);

        // draw FFT graph on desktop window
        player->DrawFFTGraphOnHWND(0, 0, 0, 300, 200);

        Sleep(50); // wait 300 ms
    }

    // destroy class instance
    player->Release();

    // we are drawing directly on desktop window, so we need
    // to remove our graph by redrawind this area on screen
    RECT rc;
    rc.top = 0;
    rc.left = 0;
    rc.right = 300;
    rc.bottom = 200;
    InvalidateRect(0, &rc, TRUE);

    return 0;
}