--- /dev/null
+/*
+** Copyright (c) 2002-2016, Erik de Castro Lopo <erikd@mega-nerd.com>
+** All rights reserved.
+**
+** This code is released under 2-clause BSD license. Please see the
+** file at : https://github.com/erikd/libsamplerate/blob/master/COPYING
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+#include <samplerate.h>
+
+#include "util.h"
+
+#define SHORT_BUFFER_LEN 2048
+#define LONG_BUFFER_LEN ((1 << 16) - 20)
+
+static void simple_test (int converter) ;
+static void stream_test (int converter, double ratio) ;
+static void init_term_test (int converter, double ratio) ;
+
+static int next_block_length (int reset) ;
+
+int
+main (void)
+{ static double src_ratios [] =
+ { 0.999900, 1.000100, 0.789012, 1.200000, 0.333333, 3.100000,
+ 0.125000, 8.000000, 0.099900, 9.990000, 0.100000, 10.00000
+ } ;
+
+ int k ;
+
+ puts ("\n Zero Order Hold interpolator:") ;
+
+ for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++)
+ init_term_test (SRC_ZERO_ORDER_HOLD, src_ratios [k]) ;
+ puts ("") ;
+ for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++)
+ stream_test (SRC_ZERO_ORDER_HOLD, src_ratios [k]) ;
+
+
+ puts ("\n Linear interpolator:") ;
+ for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++)
+ init_term_test (SRC_LINEAR, src_ratios [k]) ;
+ puts ("") ;
+ for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++)
+ stream_test (SRC_LINEAR, src_ratios [k]) ;
+
+
+ puts ("\n Sinc interpolator:") ;
+ for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++)
+ init_term_test (SRC_SINC_FASTEST, src_ratios [k]) ;
+ puts ("") ;
+ for (k = 0 ; k < ARRAY_LEN (src_ratios) ; k++)
+ stream_test (SRC_SINC_FASTEST, src_ratios [k]) ;
+
+ puts ("") ;
+
+ simple_test (SRC_SINC_FASTEST) ;
+
+ return 0 ;
+} /* main */
+
+static void
+simple_test (int converter)
+{
+ int ilen = 199030, olen = 1000, error ;
+
+ {
+ float in [ilen] ;
+ float out [olen] ;
+ double ratio = (1.0 * olen) / ilen ;
+ SRC_DATA src_data =
+ { in, out,
+ ilen, olen,
+ 0, 0, 0,
+ ratio
+ } ;
+
+ error = src_simple (&src_data, converter, 1) ;
+ if (error)
+ { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ;
+ exit (1) ;
+ } ;
+ } ;
+
+ return ;
+} /* simple_test */
+
+static void
+init_term_test (int converter, double src_ratio)
+{ static float input [SHORT_BUFFER_LEN], output [SHORT_BUFFER_LEN] ;
+
+ SRC_DATA src_data ;
+
+ int k, input_len, output_len, error, terminate ;
+
+ printf ("\tinit_term_test (SRC ratio = %7.4f) .......... ", src_ratio) ;
+ fflush (stdout) ;
+
+ /* Calculate maximun input and output lengths. */
+ if (src_ratio >= 1.0)
+ { output_len = SHORT_BUFFER_LEN ;
+ input_len = (int) floor (SHORT_BUFFER_LEN / src_ratio) ;
+ }
+ else
+ { input_len = SHORT_BUFFER_LEN ;
+ output_len = (int) floor (SHORT_BUFFER_LEN * src_ratio) ;
+ } ;
+
+ /* Reduce input_len by 10 so output is longer than necessary. */
+ input_len -= 10 ;
+
+ for (k = 0 ; k < ARRAY_LEN (input) ; k++)
+ input [k] = 1.0 ;
+
+ if (output_len > SHORT_BUFFER_LEN)
+ { printf ("\n\nLine %d : output_len > SHORT_BUFFER_LEN\n\n", __LINE__) ;
+ exit (1) ;
+ } ;
+
+ 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 = SHORT_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) ? 1 : 1.0 / src_ratio) ;
+
+ if (fabs (src_ratio * input_len - src_data.output_frames_gen) > terminate)
+ { printf ("\n\nLine %d : Bad output frame count.\n\n", __LINE__) ;
+ printf ("\tterminate : %d\n", terminate) ;
+ printf ("\tsrc_ratio : %.4f\n", src_ratio) ;
+ printf ("\tinput_len : %d\n"
+ "\tinput_len * src_ratio : %f\n", input_len, input_len * src_ratio) ;
+ printf ("\toutput_frames_gen : %ld\n\n", src_data.output_frames_gen) ;
+ exit (1) ;
+ } ;
+
+ if (labs (src_data.input_frames_used - input_len) > 1)
+ { printf ("\n\nLine %d : input_frames_used should be %d, is %ld.\n\n",
+ __LINE__, input_len, src_data.input_frames_used) ;
+ printf ("\tsrc_ratio : %.4f\n", src_ratio) ;
+ printf ("\tinput_len : %d\n\tinput_used : %ld\n\n", input_len, src_data.input_frames_used) ;
+ exit (1) ;
+ } ;
+
+ if (fabs (output [0]) < 0.1)
+ { printf ("\n\nLine %d : First output sample is bad.\n\n", __LINE__) ;
+ printf ("\toutput [0] == %f\n\n", output [0]) ;
+ exit (1) ;
+ }
+
+ puts ("ok") ;
+
+ return ;
+} /* init_term_test */
+
+static void
+stream_test (int converter, double src_ratio)
+{ static float input [LONG_BUFFER_LEN], output [LONG_BUFFER_LEN] ;
+
+ SRC_STATE *src_state ;
+ SRC_DATA src_data ;
+
+ int input_len, output_len, current_in, current_out ;
+ int k, error, terminate ;
+
+ printf ("\tstream_test (SRC ratio = %7.4f) .......... ", src_ratio) ;
+ fflush (stdout) ;
+
+/* Erik */
+for (k = 0 ; k < LONG_BUFFER_LEN ; k++) input [k] = k * 1.0 ;
+
+ /* Calculate maximun input and output lengths. */
+ if (src_ratio >= 1.0)
+ { output_len = LONG_BUFFER_LEN ;
+ input_len = (int) floor (LONG_BUFFER_LEN / src_ratio) ;
+ }
+ else
+ { input_len = LONG_BUFFER_LEN ;
+ output_len = (int) floor (LONG_BUFFER_LEN * src_ratio) ;
+ } ;
+
+ /* Reduce input_len by 10 so output is longer than necessary. */
+ input_len -= 20 ;
+
+ if (output_len > LONG_BUFFER_LEN)
+ { printf ("\n\nLine %d : output_len > LONG_BUFFER_LEN\n\n", __LINE__) ;
+ exit (1) ;
+ } ;
+
+ current_in = current_out = 0 ;
+
+ /* 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 = 0 ; /* Set this later. */
+
+ src_data.data_in = input ;
+
+ src_data.src_ratio = src_ratio ;
+
+ src_data.data_out = output ;
+ src_data.output_frames = ARRAY_LEN (output) / 10 ;
+
+ terminate = 1 + (int) ceil ((src_ratio >= 1.0) ? src_ratio : 1.0 / src_ratio) ;
+
+ while (1)
+ {
+ src_data.input_frames = next_block_length (0) ;
+ src_data.input_frames = MIN (src_data.input_frames, input_len - current_in) ;
+
+ src_data.output_frames = ARRAY_LEN (output) - current_out ;
+ /*-Erik MIN (src_data.output_frames, output_len - current_out) ;-*/
+
+ src_data.end_of_input = (current_in >= input_len) ? 1 : 0 ;
+
+ 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.end_of_input && src_data.output_frames_gen == 0)
+ break ;
+
+ if (src_data.input_frames_used > src_data.input_frames)
+ { printf ("\n\nLine %d : input_frames_used > input_frames\n\n", __LINE__) ;
+ printf (" src_data.input_frames : %ld\n", src_data.input_frames) ;
+ printf (" src_data.input_frames_used : %ld\n", src_data.input_frames_used) ;
+ printf (" src_data.output_frames : %ld\n", src_data.output_frames) ;
+ printf (" src_data.output_frames_gen : %ld\n\n", src_data.output_frames_gen) ;
+ exit (1) ;
+ } ;
+
+ if (src_data.input_frames_used < 0)
+ { printf ("\n\nLine %d : input_frames_used (%ld) < 0\n\n", __LINE__, src_data.input_frames_used) ;
+ exit (1) ;
+ } ;
+
+ if (src_data.output_frames_gen < 0)
+ { printf ("\n\nLine %d : output_frames_gen (%ld) < 0\n\n", __LINE__, src_data.output_frames_gen) ;
+ exit (1) ;
+ } ;
+
+ current_in += src_data.input_frames_used ;
+ current_out += src_data.output_frames_gen ;
+
+ if (current_in > input_len + terminate)
+ { printf ("\n\nLine %d : current_in (%d) > input_len (%d + %d)\n\n", __LINE__, current_in, input_len, terminate) ;
+ exit (1) ;
+ } ;
+
+ if (current_out > output_len)
+ { printf ("\n\nLine %d : current_out (%d) > output_len (%d)\n\n", __LINE__, current_out, output_len) ;
+ exit (1) ;
+ } ;
+
+ if (src_data.input_frames_used > input_len)
+ { printf ("\n\nLine %d : input_frames_used (%ld) > %d\n\n", __LINE__, src_data.input_frames_used, input_len) ;
+ exit (1) ;
+ } ;
+
+ if (src_data.output_frames_gen > output_len)
+ { printf ("\n\nLine %d : output_frames_gen (%ld) > %d\n\n", __LINE__, src_data.output_frames_gen, output_len) ;
+ exit (1) ;
+ } ;
+
+ if (src_data.data_in == NULL && src_data.output_frames_gen == 0)
+ break ;
+
+
+ src_data.data_in += src_data.input_frames_used ;
+ src_data.data_out += src_data.output_frames_gen ;
+ } ;
+
+ src_state = src_delete (src_state) ;
+
+ if (fabs (current_out - src_ratio * input_len) > terminate)
+ { printf ("\n\nLine %d : bad output data length %d should be %2.1f +/- %d.\n", __LINE__,
+ current_out, src_ratio * input_len, terminate) ;
+ printf ("\tsrc_ratio : %.4f\n", src_ratio) ;
+ printf ("\tinput_len : %d\n\tinput_used : %d\n", input_len, current_in) ;
+ printf ("\toutput_len : %d\n\toutput_gen : %d\n\n", output_len, current_out) ;
+ exit (1) ;
+ } ;
+
+ if (current_in != input_len)
+ { printf ("\n\nLine %d : unused input.\n", __LINE__) ;
+ printf ("\tinput_len : %d\n", input_len) ;
+ printf ("\tinput_frames_used : %d\n\n", current_in) ;
+ exit (1) ;
+ } ;
+
+ puts ("ok") ;
+
+ return ;
+} /* stream_test */
+
+static int
+next_block_length (int reset)
+{ static int block_lengths [] = /* Should be an odd length. */
+ { /*-2, 500, 5, 400, 10, 300, 20, 200, 50, 100, 70 -*/
+ 5, 400, 10, 300, 20, 200, 50, 100, 70
+ } ;
+ static int block_len_index = 0 ;
+
+ if (reset)
+ block_len_index = 0 ;
+ else
+ block_len_index = (block_len_index + 1) % ARRAY_LEN (block_lengths) ;
+
+ return block_lengths [block_len_index] ;
+} /* next_block_length */
+
projects / audio-libsamplerate.git / blobdiff