ref: c4f4d148a77541d6569bcd425e738982a13f7441
dir: /tests/simple_test.c/
/* ** Copyright (C) 2002-2004 Erik de Castro Lopo <[email protected]> ** ** This program is free software; you can redistribute it and/or modify ** it under the terms of the GNU General Public License as published by ** the Free Software Foundation; either version 2 of the License, or ** (at your option) any later version. ** ** This program is distributed in the hope that it will be useful, ** but WITHOUT ANY WARRANTY; without even the implied warranty of ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ** GNU General Public License for more details. ** ** You should have received a copy of the GNU General Public License ** along with this program; if not, write to the Free Software ** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <math.h> #include <samplerate.h> #include "util.h" #define BUFFER_LEN 2048 static void simple_test (int converter, double ratio) ; int main (void) { static double src_ratios [] = { 1.0001, 0.099, 0.1, 0.33333333, 0.789, 1.9, 3.1, 9.9 } ; int k ; /* Force output of the Electric Fence banner message. */ force_efence_banner () ; puts ("") ; puts (" Zero Order Hold interpolator :") ; for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++) simple_test (SRC_ZERO_ORDER_HOLD, src_ratios [k]) ; puts (" Linear interpolator :") ; for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++) simple_test (SRC_LINEAR, src_ratios [k]) ; puts (" Sinc interpolator :") ; for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++) simple_test (SRC_SINC_FASTEST, src_ratios [k]) ; puts ("") ; return 0 ; } /* main */ static void simple_test (int converter, double src_ratio) { static float input [BUFFER_LEN], output [BUFFER_LEN] ; SRC_DATA src_data ; int input_len, output_len, error, terminate ; printf ("\tsimple_test (SRC ratio = %6.4f) ........... ", src_ratio) ; fflush (stdout) ; /* Calculate maximun input and output lengths. */ if (src_ratio >= 1.0) { output_len = BUFFER_LEN ; input_len = (int) floor (BUFFER_LEN / src_ratio) ; } else { input_len = BUFFER_LEN ; output_len = (int) floor (BUFFER_LEN * src_ratio) ; } ; /* Reduce input_len by 10 so output is longer than necessary. */ input_len -= 10 ; if (output_len > BUFFER_LEN) { printf ("\n\nLine %d : output_len > BUFFER_LEN\n\n", __LINE__) ; exit (1) ; } ; memset (&src_data, 0, sizeof (src_data)) ; src_data.data_in = input ; src_data.input_frames = input_len ; src_data.src_ratio = src_ratio ; src_data.data_out = output ; src_data.output_frames = BUFFER_LEN ; if ((error = src_simple (&src_data, converter, 1))) { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ; exit (1) ; } ; terminate = (int) ceil ((src_ratio >= 1.0) ? src_ratio : 1.0 / src_ratio) ; if (fabs (src_data.output_frames_gen - src_ratio * input_len) > 2 * terminate) { printf ("\n\nLine %d : bad output data length %ld should be %d.\n", __LINE__, src_data.output_frames_gen, (int) floor (src_ratio * input_len)) ; printf ("\tsrc_ratio : %.4f\n", src_ratio) ; printf ("\tinput_len : %d\n\toutput_len : %d\n\n", input_len, output_len) ; exit (1) ; } ; puts ("ok") ; return ; } /* simple_test */ /* ** Do not edit or modify anything in this comment block. ** The arch-tag line is a file identity tag for the GNU Arch ** revision control system. ** ** arch-tag: d60f8f5f-154b-4541-958e-e1062140e085 */