ref: 1def46dcae12a86d446caf130d8b2aa712d4c48a
dir: /tests/varispeed_test.c/
/* ** Copyright (C) 2006 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 <math.h> #include <string.h> #include <samplerate.h> #include "util.h" #define BUFFER_LEN (1 << 16) static void varispeed_test (int converter, double target_snr) ; int main (void) { puts ("") ; printf (" Zero Order Hold interpolator : ") ; varispeed_test (SRC_ZERO_ORDER_HOLD, 10.0) ; printf (" Linear interpolator : ") ; varispeed_test (SRC_LINEAR, 10.0) ; printf (" Sinc interpolator : ") ; varispeed_test (SRC_SINC_FASTEST, 115.0) ; puts ("") ; return 0 ; } /* main */ static void varispeed_test (int converter, double target_snr) { static float input [BUFFER_LEN], output [BUFFER_LEN] ; double sine_freq, snr ; SRC_STATE *src_state ; SRC_DATA src_data ; int input_len, error ; memset (input, 0, sizeof (input)) ; input_len = ARRAY_LEN (input) / 2 ; sine_freq = 0.0111 ; gen_windowed_sines (1, &sine_freq, 1.0, input, input_len) ; /* Perform sample rate conversion. */ if ((src_state = src_new (converter, 1, &error)) == NULL) { printf ("\n\nLine %d : src_new() failed : %s\n\n", __LINE__, src_strerror (error)) ; exit (1) ; } ; src_data.end_of_input = 1 ; src_data.data_in = input ; src_data.input_frames = input_len ; src_data.src_ratio = 3.0 ; src_data.data_out = output ; src_data.output_frames = ARRAY_LEN (output) ; if ((error = src_set_ratio (src_state, 1.0 / src_data.src_ratio))) { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ; exit (1) ; } ; if ((error = src_process (src_state, &src_data))) { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ; printf (" src_data.input_frames : %ld\n", src_data.input_frames) ; printf (" src_data.output_frames : %ld\n\n", src_data.output_frames) ; exit (1) ; } ; if (src_data.input_frames_used != input_len) { printf ("\n\nLine %d : unused input.\n", __LINE__) ; printf ("\tinput_len : %d\n", input_len) ; printf ("\tinput_frames_used : %ld\n\n", src_data.input_frames_used) ; exit (1) ; } ; /* Copy the last output to the input. */ memcpy (input, output, sizeof (input)) ; reverse_data (input, src_data.output_frames_gen) ; if ((error = src_reset (src_state))) { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ; exit (1) ; } ; src_data.end_of_input = 1 ; src_data.data_in = input ; input_len = src_data.input_frames = src_data.output_frames_gen ; src_data.data_out = output ; src_data.output_frames = ARRAY_LEN (output) ; if ((error = src_set_ratio (src_state, 1.0 / src_data.src_ratio))) { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ; exit (1) ; } ; if ((error = src_process (src_state, &src_data))) { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ; printf (" src_data.input_frames : %ld\n", src_data.input_frames) ; printf (" src_data.output_frames : %ld\n\n", src_data.output_frames) ; exit (1) ; } ; if (src_data.input_frames_used != input_len) { printf ("\n\nLine %d : unused input.\n", __LINE__) ; printf ("\tinput_len : %d\n", input_len) ; printf ("\tinput_frames_used : %ld\n\n", src_data.input_frames_used) ; exit (1) ; } ; src_state = src_delete (src_state) ; snr = calculate_snr (output, src_data.output_frames_gen, 1) ; if (target_snr > snr) { printf ("\n\nLine %d : snr (%3.1f) does not meet target (%3.1f)\n\n", __LINE__, snr, target_snr) ; save_oct_float ("varispeed.mat", input, src_data.input_frames, output, src_data.output_frames_gen) ; exit (1) ; } ; puts ("ok") ; return ; } /* varispeed_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: 0c9492de-9c59-4690-ba38-f384b547dc74 */