Chris@41: /* Chris@41: ** Copyright (c) 2002-2016, Erik de Castro Lopo Chris@41: ** All rights reserved. Chris@41: ** Chris@41: ** This code is released under 2-clause BSD license. Please see the Chris@41: ** file at : https://github.com/erikd/libsamplerate/blob/master/COPYING Chris@41: */ Chris@41: Chris@41: #include Chris@41: #include Chris@41: #include Chris@41: #include Chris@41: Chris@41: #include Chris@41: Chris@41: #include "util.h" Chris@41: Chris@41: #define BUFFER_LEN 2048 Chris@41: Chris@41: static void simple_test (int converter, double ratio) ; Chris@41: Chris@41: int Chris@41: main (void) Chris@41: { static double src_ratios [] = Chris@41: { 1.0001, 0.099, 0.1, 0.33333333, 0.789, 1.9, 3.1, 9.9 Chris@41: } ; Chris@41: Chris@41: int k ; Chris@41: Chris@41: puts ("") ; Chris@41: Chris@41: puts (" Zero Order Hold interpolator :") ; Chris@41: for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++) Chris@41: simple_test (SRC_ZERO_ORDER_HOLD, src_ratios [k]) ; Chris@41: Chris@41: puts (" Linear interpolator :") ; Chris@41: for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++) Chris@41: simple_test (SRC_LINEAR, src_ratios [k]) ; Chris@41: Chris@41: puts (" Sinc interpolator :") ; Chris@41: for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++) Chris@41: simple_test (SRC_SINC_FASTEST, src_ratios [k]) ; Chris@41: Chris@41: puts ("") ; Chris@41: Chris@41: return 0 ; Chris@41: } /* main */ Chris@41: Chris@41: static void Chris@41: simple_test (int converter, double src_ratio) Chris@41: { static float input [BUFFER_LEN], output [BUFFER_LEN] ; Chris@41: Chris@41: SRC_DATA src_data ; Chris@41: Chris@41: int input_len, output_len, error, terminate ; Chris@41: Chris@41: printf ("\tsimple_test (SRC ratio = %6.4f) ........... ", src_ratio) ; Chris@41: fflush (stdout) ; Chris@41: Chris@41: /* Calculate maximun input and output lengths. */ Chris@41: if (src_ratio >= 1.0) Chris@41: { output_len = BUFFER_LEN ; Chris@41: input_len = (int) floor (BUFFER_LEN / src_ratio) ; Chris@41: } Chris@41: else Chris@41: { input_len = BUFFER_LEN ; Chris@41: output_len = (int) floor (BUFFER_LEN * src_ratio) ; Chris@41: } ; Chris@41: Chris@41: /* Reduce input_len by 10 so output is longer than necessary. */ Chris@41: input_len -= 10 ; Chris@41: Chris@41: if (output_len > BUFFER_LEN) Chris@41: { printf ("\n\nLine %d : output_len > BUFFER_LEN\n\n", __LINE__) ; Chris@41: exit (1) ; Chris@41: } ; Chris@41: Chris@41: memset (&src_data, 0, sizeof (src_data)) ; Chris@41: Chris@41: src_data.data_in = input ; Chris@41: src_data.input_frames = input_len ; Chris@41: Chris@41: src_data.src_ratio = src_ratio ; Chris@41: Chris@41: src_data.data_out = output ; Chris@41: src_data.output_frames = BUFFER_LEN ; Chris@41: Chris@41: if ((error = src_simple (&src_data, converter, 1))) Chris@41: { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ; Chris@41: exit (1) ; Chris@41: } ; Chris@41: Chris@41: terminate = (int) ceil ((src_ratio >= 1.0) ? src_ratio : 1.0 / src_ratio) ; Chris@41: Chris@41: if (fabs (src_data.output_frames_gen - src_ratio * input_len) > 2 * terminate) Chris@41: { printf ("\n\nLine %d : bad output data length %ld should be %d.\n", __LINE__, Chris@41: src_data.output_frames_gen, (int) floor (src_ratio * input_len)) ; Chris@41: printf ("\tsrc_ratio : %.4f\n", src_ratio) ; Chris@41: printf ("\tinput_len : %d\n\toutput_len : %d\n\n", input_len, output_len) ; Chris@41: exit (1) ; Chris@41: } ; Chris@41: Chris@41: puts ("ok") ; Chris@41: Chris@41: return ; Chris@41: } /* simple_test */ Chris@41: