get_number_frames

Digital Signal Processing Library

Voice Lab

get_number_frames

int get_number_frames(FILE *in_file, int header_length, int data_length,
 int sample_rate, int window_size, int overlap)
{
        int number;

        fseek(in_file, 0, SEEK_END);
        number = ftell(in_file);

        number -= header_length;

        /* if sample rate = 50K, use half of the values */
        if(sample_rate == 50000) number /= 2;

        /* Truncate number to a multiple of data_length */
        number /= data_length;

        /* Truncate number to a multiple of window_size */
        switch(overlap) {
        case 2:
                number = (number * 2) / window_size;
                number--;
                break;
        case 1:
        default:
                number /= window_size;
                break;
        }

        /* seek to beginning of data segment */
        fseek(in_file, header_length, SEEK_SET);

        return(number);
}