position_file_pointer

Digital Signal Processing Library

Voice Lab

position_file_pointer

int position_file_pointer(int window_number, int window_size, int data_size,
 int header_length, int sample_rate, int overlap, FILE *input_file)
{
        int file_pos;

        /* The position takes into account the file header size, the window number and size */
        /* In our specific case, we use 50% overlapping windows */

        /*
        ** Overlap values:
        ** 1 -> no overlap
        ** 2 -> 50% overlap
        */

        if(sample_rate == 50000) {
                file_pos = (window_number*window_size*data_size*2) / overlap;
        } else {
                file_pos = (window_number*window_size*data_size) / overlap;
        }
        if(fseek(input_file, (file_pos+header_length), SEEK_SET) == -1) {
                return(-1);
        }
        return(ftell(input_file));
}