{

if (argc != 5)

{

printf("Invalid argumen!\n");

printf("-- LightMusic <camera_number> <buffer_length> <low_freq> <hi_freq>\n");

printf("-- Press Esc to exit\n");

printf("ex : LightMusic 1 5620 261 1760\n");

printf("-- <camera_number> : device number of camera (from 1 to 99)\n");

printf("-- <buffer_lenght> : buffer lenght used (from 1000 to 20000)\n");

printf("-- <low_freq> : freq of lowest tone, low 261, mid 523, hi 1046\n");

printf("-- <hi_freq> : freq of highest tone, low 493, mid 987, hi 1760\n");

printf("CAUTION!!\n");

printf("-- bigger number of buffer length, slower frame scan run\n");

printf("-- smaller number of buffer length, bigger playback sound glitch occur\n");

printf("-- find right number of buffer length depending on your hardware\n");

printf("LightMusic -- developed by Lonehack\n");

return 0;

}

int cam = atoi(argv[1]);

BUFFER_LEN = atoi(argv[2]);

lotone = atoi(argv[3]);

hitone = atoi(argv[4]);

//-- Video prepare

VideoCapture capture;

capture.set(CV_CAP_PROP_FRAME_WIDTH, 640);

capture.set(CV_CAP_PROP_FRAME_HEIGHT, 360);

Mat frame;

time_t start, finish;

//-- Sound error handling

if ((err = snd_pcm_open(&handle, device, SND_PCM_STREAM_PLAYBACK, 0)) < 0)

{

printf(" --(!) Playback open error: %s --\n", snd_strerror(err));

exit(EXIT_FAILURE);

}

if ((err = snd_pcm_set_params(handle,

SND_PCM_FORMAT_FLOAT,

SND_PCM_ACCESS_RW_INTERLEAVED,

1,

44100, //samplerate, standart 44100

1,

80200)) < 0) //latency, standart 2x samplerate

{

printf(" --(!) Playback open error: %s --\n", snd_strerror(err));

exit(EXIT_FAILURE);

}

//-- Opening video stream

// for (int cam=1;cam<100;cam++)

// {

// capture.open( cam ); //-- opening input : ( -1 ) any camera or camera number (1,...,99), ( argv[1] ) video file

// }

capture.open( cam ); //-- opening input : ( -1 ) any camera or camera number (1,...,99), ( argv[1] ) video file

//-- Checking interface

if ( ! capture.isOpened() )

{

printf("--(!)Error opening video capture --\n");

return -1;

}

//-- Start the clock

time(&start);

int counter=0;

//-- Read captured

while ( capture.read(frame) )

{

if( frame.empty() )

{

printf(" --(!) No captured frame -- Break!\n");

break;

}

//-- fix image resolution

resize(frame, frame, Size(640, 360), 0, 0, INTER_CUBIC);

//-- Show original frame

//namedWindow(window_name_0,CV_WINDOW_NORMAL|CV_WINDOW_KEEPRATIO);

//imshow( window_name_0,frame );

//-- flip frame

flip(frame, frame, -1);

//-- Apply the lightDetect

lightDetect(frame);

//printf("X = %d, Y = %d, Inten = %d \n", PosX, PosY, inten_frame);

//-- apply sound parameter

SineWave(PosX, PosY);

//Stop the clock and show FPS

time(&finish);

counter++;

double sec=difftime(finish,start);

double fps=counter/sec;

printf("fps = %lf\n",fps);

//-- bail out if escape was pressed

int c = waitKey(10);

if( (char)c == 27 )

{

printf("\nStoped by User\n");

break;

}

}

//-- Closing program

snd_pcm_close(handle);

capture.release();

return 0;

{

Mat frame_gray(frame.size(),frame.type());

Point highPos;

int bigest = 0;

//-- convert to grayscale

cvtColor(frame,frame_gray,CV_BGR2GRAY);

//-- detecting light

for (int y = 0; y < frame_gray.rows; y++)

{

for (int x = 0; x < frame_gray.cols; x++)

{

inten_frame = frame_gray.at<unsigned char>(Point(x,y));

if(inten_frame > Thresh)

{

if(bigest < inten_frame)

{

bigest=inten_frame;

highPos.x=x;

highPos.y=y;

}

}

}

}

PosX = highPos.x;

PosY = highPos.y;

inten_frame = bigest;

//-- Show Result

//printf("X = %d,Y = %d,Inten = %d \n", highPos.x,highPos.y,bigest);

circle(frame,Point(highPos.x,highPos.y), 5,Scalar(100,0,190), -1);

flip(frame, frame, 0);

namedWindow(window_name_1,CV_WINDOW_NORMAL|CV_WINDOW_KEEPRATIO);

imshow( window_name_1,frame );

{

float buffer [BUFFER_LEN];

int k, f, ft;

double amp;

int fs = BUFFER_LEN; //sampling freq

f = (hitone-lotone)*PosX/640+lotone; //freq

if(PosX == 0)

{

f = 0;

}

amp = 100*PosY/360; //amplify

ft = fs*f/44100;

//-- generating sine wave

for (k=0; k<BUFFER_LEN; k++)

{

buffer[k] = ((amp/100)*sin(2*M_PI*ft/fs*k));

}

//-- play sound

frames = snd_pcm_writei(handle, buffer, BUFFER_LEN);

//-- show sound play

printf("\nX = %i, Y = %i \n", PosX, PosY);

printf("tone %dHz amp %.2f\n",f, amp);