--- /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 "config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <assert.h>
+
+#if (HAVE_FFTW3)
+#include <fftw3.h>
+#else
+static inline void
+fftw_cleanup (void)
+{ return ;
+}
+#endif
+
+#include <samplerate.h>
+
+#include "util.h"
+#define BUFFER_LEN 50000
+#define BLOCK_LEN (12)
+
+#define MAX_CHANNELS 10
+
+static void simple_test (int converter, int channel_count, double target_snr) ;
+static void process_test (int converter, int channel_count, double target_snr) ;
+static void callback_test (int converter, int channel_count, double target_snr) ;
+
+int
+main (void)
+{ double target ;
+ int k ;
+
+ puts ("\n Zero Order Hold interpolator :") ;
+ target = 38.0 ;
+ for (k = 1 ; k <= 3 ; k++)
+ { simple_test (SRC_ZERO_ORDER_HOLD, k, target) ;
+ process_test (SRC_ZERO_ORDER_HOLD, k, target) ;
+ callback_test (SRC_ZERO_ORDER_HOLD, k, target) ;
+ } ;
+
+ puts ("\n Linear interpolator :") ;
+ target = 79.0 ;
+ for (k = 1 ; k <= 3 ; k++)
+ { simple_test (SRC_LINEAR, k, target) ;
+ process_test (SRC_LINEAR, k, target) ;
+ callback_test (SRC_LINEAR, k, target) ;
+ } ;
+
+ puts ("\n Sinc interpolator :") ;
+ target = 100.0 ;
+ for (k = 1 ; k <= MAX_CHANNELS ; k++)
+ { simple_test (SRC_SINC_FASTEST, k, target) ;
+ process_test (SRC_SINC_FASTEST, k, target) ;
+ callback_test (SRC_SINC_FASTEST, k, target) ;
+ } ;
+
+ fftw_cleanup () ;
+ puts ("") ;
+
+ return 0 ;
+} /* main */
+
+/*==============================================================================
+*/
+
+static float input_serial [BUFFER_LEN * MAX_CHANNELS] ;
+static float input_interleaved [BUFFER_LEN * MAX_CHANNELS] ;
+static float output_interleaved [BUFFER_LEN * MAX_CHANNELS] ;
+static float output_serial [BUFFER_LEN * MAX_CHANNELS] ;
+
+static void
+simple_test (int converter, int channel_count, double target_snr)
+{ SRC_DATA src_data ;
+
+ double freq, snr ;
+ int ch, error, frames ;
+
+ printf ("\t%-22s (%2d channel%c) ............ ", "simple_test", channel_count, channel_count > 1 ? 's' : ' ') ;
+ fflush (stdout) ;
+
+ assert (channel_count <= MAX_CHANNELS) ;
+
+ memset (input_serial, 0, sizeof (input_serial)) ;
+ memset (input_interleaved, 0, sizeof (input_interleaved)) ;
+ memset (output_interleaved, 0, sizeof (output_interleaved)) ;
+ memset (output_serial, 0, sizeof (output_serial)) ;
+
+ frames = BUFFER_LEN ;
+
+ /* Calculate channel_count separate windowed sine waves. */
+ for (ch = 0 ; ch < channel_count ; ch++)
+ { freq = (200.0 + 33.333333333 * ch) / 44100.0 ;
+ gen_windowed_sines (1, &freq, 1.0, input_serial + ch * frames, frames) ;
+ } ;
+
+ /* Interleave the data in preparation for SRC. */
+ interleave_data (input_serial, input_interleaved, frames, channel_count) ;
+
+ /* Choose a converstion ratio <= 1.0. */
+ src_data.src_ratio = 0.95 ;
+
+ src_data.data_in = input_interleaved ;
+ src_data.input_frames = frames ;
+
+ src_data.data_out = output_interleaved ;
+ src_data.output_frames = frames ;
+
+ if ((error = src_simple (&src_data, converter, channel_count)))
+ { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ;
+ exit (1) ;
+ } ;
+
+ if (fabs (src_data.output_frames_gen - src_data.src_ratio * src_data.input_frames) > 2)
+ { printf ("\n\nLine %d : bad output data length %ld should be %d.\n", __LINE__,
+ src_data.output_frames_gen, (int) floor (src_data.src_ratio * src_data.input_frames)) ;
+ printf ("\tsrc_ratio : %.4f\n", src_data.src_ratio) ;
+ printf ("\tinput_len : %ld\n", src_data.input_frames) ;
+ printf ("\toutput_len : %ld\n\n", src_data.output_frames_gen) ;
+ exit (1) ;
+ } ;
+
+ /* De-interleave data so SNR can be calculated for each channel. */
+ deinterleave_data (output_interleaved, output_serial, frames, channel_count) ;
+
+ for (ch = 0 ; ch < channel_count ; ch++)
+ { snr = calculate_snr (output_serial + ch * frames, frames, 1) ;
+ if (snr < target_snr)
+ { printf ("\n\nLine %d: channel %d snr %f should be %f\n", __LINE__, ch, snr, target_snr) ;
+ save_oct_float ("output.dat", input_serial, channel_count * frames, output_serial, channel_count * frames) ;
+ exit (1) ;
+ } ;
+ } ;
+
+ puts ("ok") ;
+
+ return ;
+} /* simple_test */
+
+/*==============================================================================
+*/
+
+static void
+process_test (int converter, int channel_count, double target_snr)
+{ SRC_STATE *src_state ;
+ SRC_DATA src_data ;
+
+ double freq, snr ;
+ int ch, error, frames, current_in, current_out ;
+
+ printf ("\t%-22s (%2d channel%c) ............ ", "process_test", channel_count, channel_count > 1 ? 's' : ' ') ;
+ fflush (stdout) ;
+
+ assert (channel_count <= MAX_CHANNELS) ;
+
+ memset (input_serial, 0, sizeof (input_serial)) ;
+ memset (input_interleaved, 0, sizeof (input_interleaved)) ;
+ memset (output_interleaved, 0, sizeof (output_interleaved)) ;
+ memset (output_serial, 0, sizeof (output_serial)) ;
+
+ frames = BUFFER_LEN ;
+
+ /* Calculate channel_count separate windowed sine waves. */
+ for (ch = 0 ; ch < channel_count ; ch++)
+ { freq = (400.0 + 11.333333333 * ch) / 44100.0 ;
+ gen_windowed_sines (1, &freq, 1.0, input_serial + ch * frames, frames) ;
+ } ;
+
+ /* Interleave the data in preparation for SRC. */
+ interleave_data (input_serial, input_interleaved, frames, channel_count) ;
+
+ /* Perform sample rate conversion. */
+ if ((src_state = src_new (converter, channel_count, &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. */
+
+ /* Choose a converstion ratio < 1.0. */
+ src_data.src_ratio = 0.95 ;
+
+ src_data.data_in = input_interleaved ;
+ src_data.data_out = output_interleaved ;
+
+ current_in = current_out = 0 ;
+
+ while (1)
+ { src_data.input_frames = MAX (MIN (BLOCK_LEN, frames - current_in), 0) ;
+ src_data.output_frames = MAX (MIN (BLOCK_LEN, frames - current_out), 0) ;
+
+ if ((error = src_process (src_state, &src_data)))
+ { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ;
+ exit (1) ;
+ } ;
+
+ if (src_data.end_of_input && src_data.output_frames_gen == 0)
+ break ;
+
+ current_in += src_data.input_frames_used ;
+ current_out += src_data.output_frames_gen ;
+
+ src_data.data_in += src_data.input_frames_used * channel_count ;
+ src_data.data_out += src_data.output_frames_gen * channel_count ;
+
+ src_data.end_of_input = (current_in >= frames) ? 1 : 0 ;
+ } ;
+
+ src_state = src_delete (src_state) ;
+
+ if (fabs (current_out - src_data.src_ratio * current_in) > 2)
+ { printf ("\n\nLine %d : bad output data length %d should be %d.\n", __LINE__,
+ current_out, (int) floor (src_data.src_ratio * current_in)) ;
+ printf ("\tsrc_ratio : %.4f\n", src_data.src_ratio) ;
+ printf ("\tinput_len : %d\n", frames) ;
+ printf ("\toutput_len : %d\n\n", current_out) ;
+ exit (1) ;
+ } ;
+
+ /* De-interleave data so SNR can be calculated for each channel. */
+ deinterleave_data (output_interleaved, output_serial, frames, channel_count) ;
+
+ for (ch = 0 ; ch < channel_count ; ch++)
+ { snr = calculate_snr (output_serial + ch * frames, frames, 1) ;
+ if (snr < target_snr)
+ { printf ("\n\nLine %d: channel %d snr %f should be %f\n", __LINE__, ch, snr, target_snr) ;
+ save_oct_float ("output.dat", input_serial, channel_count * frames, output_serial, channel_count * frames) ;
+ exit (1) ;
+ } ;
+ } ;
+
+ puts ("ok") ;
+
+ return ;
+} /* process_test */
+
+/*==============================================================================
+*/
+
+typedef struct
+{ int channels ;
+ long total_frames ;
+ long current_frame ;
+ float *data ;
+} 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 ;
+
+ *data = pcb_data->data + (pcb_data->current_frame * pcb_data->channels) ;
+
+ if (pcb_data->total_frames - pcb_data->current_frame < BLOCK_LEN)
+ frames = pcb_data->total_frames - pcb_data->current_frame ;
+ else
+ frames = BLOCK_LEN ;
+
+ pcb_data->current_frame += frames ;
+
+ return frames ;
+} /* test_callback_func */
+
+static void
+callback_test (int converter, int channel_count, double target_snr)
+{ TEST_CB_DATA test_callback_data ;
+ SRC_STATE *src_state = NULL ;
+
+ double freq, snr, src_ratio ;
+ int ch, error, frames, read_total, read_count ;
+
+ printf ("\t%-22s (%2d channel%c) ............ ", "callback_test", channel_count, channel_count > 1 ? 's' : ' ') ;
+ fflush (stdout) ;
+
+ assert (channel_count <= MAX_CHANNELS) ;
+
+ memset (input_serial, 0, sizeof (input_serial)) ;
+ memset (input_interleaved, 0, sizeof (input_interleaved)) ;
+ memset (output_interleaved, 0, sizeof (output_interleaved)) ;
+ memset (output_serial, 0, sizeof (output_serial)) ;
+ memset (&test_callback_data, 0, sizeof (test_callback_data)) ;
+
+ frames = BUFFER_LEN ;
+
+ /* Calculate channel_count separate windowed sine waves. */
+ for (ch = 0 ; ch < channel_count ; ch++)
+ { freq = (200.0 + 33.333333333 * ch) / 44100.0 ;
+ gen_windowed_sines (1, &freq, 1.0, input_serial + ch * frames, frames) ;
+ } ;
+
+ /* Interleave the data in preparation for SRC. */
+ interleave_data (input_serial, input_interleaved, frames, channel_count) ;
+
+ /* Perform sample rate conversion. */
+ src_ratio = 0.95 ;
+ test_callback_data.channels = channel_count ;
+ test_callback_data.total_frames = frames ;
+ test_callback_data.current_frame = 0 ;
+ test_callback_data.data = input_interleaved ;
+
+ if ((src_state = src_callback_new (test_callback_func, converter, channel_count, &error, &test_callback_data)) == NULL)
+ { printf ("\n\nLine %d : %s\n\n", __LINE__, src_strerror (error)) ;
+ exit (1) ;
+ } ;
+
+ read_total = 0 ;
+ while (read_total < frames)
+ { read_count = src_callback_read (src_state, src_ratio, frames - read_total, output_interleaved + read_total * channel_count) ;
+
+ if (read_count <= 0)
+ break ;
+
+ read_total += read_count ;
+ } ;
+
+ 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 * frames) > 2)
+ { printf ("\n\nLine %d : bad output data length %d should be %d.\n", __LINE__,
+ read_total, (int) floor (src_ratio * frames)) ;
+ printf ("\tsrc_ratio : %.4f\n", src_ratio) ;
+ printf ("\tinput_len : %d\n", frames) ;
+ printf ("\toutput_len : %d\n\n", read_total) ;
+ exit (1) ;
+ } ;
+
+ /* De-interleave data so SNR can be calculated for each channel. */
+ deinterleave_data (output_interleaved, output_serial, frames, channel_count) ;
+
+ for (ch = 0 ; ch < channel_count ; ch++)
+ { snr = calculate_snr (output_serial + ch * frames, frames, 1) ;
+ if (snr < target_snr)
+ { printf ("\n\nLine %d: channel %d snr %f should be %f\n", __LINE__, ch, snr, target_snr) ;
+ save_oct_float ("output.dat", input_serial, channel_count * frames, output_serial, channel_count * frames) ;
+ exit (1) ;
+ } ;
+ } ;
+
+ puts ("ok") ;
+
+ return ;
+} /* callback_test */
+
projects / audio-libsamplerate.git / blobdiff