ref: ebf803b2021a0738c3cb0292794b06a3f18649b9
dir: /tests/callback_test.c/
/* ** Copyright (C) 2003 Erik de Castro Lopo <erikd@mega-nerd.com> ** ** 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 90000 #define CB_READ_LEN 256 static void callback_test (int converter, double ratio) ; int main (void) { static double src_ratios [] = { 1.0, 0.099, 0.1, 0.33333333, 0.789, 1.0001, 1.9, 3.1, 9.9 } ; int k ; puts ("") ; puts (" Zero Order Hold interpolator :") ; for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++) callback_test (SRC_ZERO_ORDER_HOLD, src_ratios [k]) ; puts (" Linear interpolator :") ; for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++) callback_test (SRC_LINEAR, src_ratios [k]) ; puts (" Sinc interpolator :") ; for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++) callback_test (SRC_SINC_FASTEST, src_ratios [k]) ; puts ("") ; return 0 ; } /* main */ /*===================================================================================== */ typedef struct { int channels ; long count, total ; float data [BUFFER_LEN] ; } TEST_CB_DATA ; static long test_callback_func (void *cb_data, float **data) { TEST_CB_DATA *pcb_data ; long frames ; if ((pcb_data = cb_data) == NULL) return 0 ; if (data == NULL) return 0 ; if (pcb_data->total - pcb_data->count > CB_READ_LEN) frames = CB_READ_LEN ; else frames = pcb_data->total - pcb_data->count ; *data = pcb_data->data + pcb_data->count ; pcb_data->count += frames ; return frames ; } /* test_callback_func */ static void callback_test (int converter, double src_ratio) { static TEST_CB_DATA test_callback_data ; static float output [BUFFER_LEN] ; SRC_STATE *src_state ; long read_count, read_total ; int input_len, output_len, error ; printf ("\tcallback_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) ; } ; test_callback_data.channels = 1 ; test_callback_data.count = 0 ; test_callback_data.total = input_len ; if ((src_state = src_callback_new (test_callback_func, converter, 1, &error, &test_callback_data)) == NULL) { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ; exit (1) ; } ; read_total = 0 ; do { read_count = (ARRAY_LEN (output) - read_total > CB_READ_LEN) ? CB_READ_LEN : ARRAY_LEN (output) - read_total ; read_count = src_callback_read (src_state, src_ratio, read_count, output + read_total) ; read_total += read_count ; } while (read_count > 0) ; if ((error = src_error (src_state)) != 0) { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ; exit (1) ; } ; src_state = src_delete (src_state) ; if (fabs (read_total - src_ratio * input_len) > 2) { printf ("\n\nLine %d : input / output length mismatch.\n\n", __LINE__) ; printf (" input len : %d\n", input_len) ; printf (" output len : %ld (should be %g +/- 2)\n\n", read_total, floor (0.5 + src_ratio * input_len)) ; exit (1) ; } ; puts ("ok") ; return ; } /* callback_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: bf1edd96-b137-48bc-a3ab-194007fadb55 */