Add libsamplerate for resampling decoder output

1 files changed, 134 insertions, 0 deletions

diff --git a/lib/libsamplerate/libsamplerate-0.2.2/tests/clone_test.c b/lib/libsamplerate/libsamplerate-0.2.2/tests/clone_test.c
new file mode 100755
index 00000000..0e420e1f
--- /dev/null
+++ b/lib/libsamplerate/libsamplerate-0.2.2/tests/clone_test.c
@@ -0,0 +1,134 @@
+/*
+** 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/libsndfile/libsamplerate/blob/master/COPYING
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <samplerate.h>
+
+#include "util.h"
+
+#define	BUFFER_LEN		(1 << 16)
+#define NUM_CHANNELS 	2
+#define FRAMES_PER_PASS (BUFFER_LEN >> 1)
+
+static void
+clone_test (int converter)
+{	static float input_serial [BUFFER_LEN * NUM_CHANNELS], input_interleaved [BUFFER_LEN * NUM_CHANNELS] ;
+	static float output [BUFFER_LEN * NUM_CHANNELS], output_cloned [BUFFER_LEN * NUM_CHANNELS] ;
+	double sine_freq ;
+
+	SRC_STATE* src_state ;
+	SRC_STATE* src_state_cloned ;
+	SRC_DATA src_data, src_data_cloned ;
+
+	int error, frame, ch, idx ;
+
+	printf ("        clone_test          (%-28s) ....... ", src_get_name (converter)) ;
+	fflush (stdout) ;
+
+	memset (input_serial, 0, sizeof (input_serial)) ;
+	memset (input_interleaved, 0, sizeof (input_interleaved)) ;
+	memset (output, 0, sizeof (output)) ;
+	memset (output_cloned, 0, sizeof (output_cloned)) ;
+
+	/* Fill input buffer with an n-channel interleaved sine wave */
+	sine_freq = 0.0111 ;
+	gen_windowed_sines (1, &sine_freq, 1.0, input_serial, BUFFER_LEN) ;
+	gen_windowed_sines (1, &sine_freq, 1.0, input_serial + BUFFER_LEN, BUFFER_LEN) ;
+	interleave_data (input_serial, input_interleaved, BUFFER_LEN, NUM_CHANNELS) ;
+
+	if ((src_state = src_new (converter, NUM_CHANNELS, &error)) == NULL)
+	{	printf ("\n\nLine %d : src_new() failed : %s\n\n", __LINE__, src_strerror (error)) ;
+		exit (1) ;
+		} ;
+
+	/* Perform initial pass using first half of buffer so that src_state has non-trivial state */
+	src_data.src_ratio = 1.1 ;
+	src_data.input_frames = FRAMES_PER_PASS ;
+	src_data.output_frames = FRAMES_PER_PASS ;
+	src_data.data_in = input_interleaved ;
+	src_data.data_out = output ;
+	src_data.output_frames_gen = 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) ;
+		} ;
+
+	/* Clone handle */
+	if ((src_state_cloned = src_clone (src_state, &error)) == NULL)
+	{	printf ("\n\nLine %d : src_clone() failed : %s\n\n", __LINE__, src_strerror (error)) ;
+		exit (1) ;
+		} ;
+
+	/* Process second half of buffer with both handles */
+	src_data.data_in = input_interleaved + FRAMES_PER_PASS ;
+
+	src_data_cloned = src_data ;
+	src_data_cloned.data_out = output_cloned ;
+
+	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 ((error = src_process (src_state_cloned, &src_data_cloned)))
+	{	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) ;
+		} ;
+
+	/* Check that both handles generated the same number of output frames */
+	if (src_data.output_frames_gen != src_data_cloned.output_frames_gen)
+	{	printf ("\n\nLine %d : cloned output_frames_gen (%ld) != original (%ld)\n\n", __LINE__,
+				src_data_cloned.output_frames_gen, src_data.output_frames_gen) ;
+		exit (1) ;
+		} ;
+
+	for (ch = 0 ; ch < NUM_CHANNELS ; ch++)
+	{	for (frame = 0 ; frame < src_data.output_frames_gen ; frame++)
+		{	idx = ch * NUM_CHANNELS + ch ;
+			if (output[idx] != output_cloned[idx])
+			{	printf ("\n\nLine %d : cloned data does not equal original data at channel %d, frame %d\n\n",
+						__LINE__, ch, frame) ;
+				exit (1) ;
+				} ;
+			} ;
+		} ;
+
+	src_delete (src_state) ;
+	src_delete (src_state_cloned) ;
+
+	puts ("ok") ;
+} /* clone_test */
+
+int
+main (void)
+{
+	puts("");
+
+	clone_test (SRC_ZERO_ORDER_HOLD) ;
+	clone_test (SRC_LINEAR) ;
+#ifdef ENABLE_SINC_FAST_CONVERTER
+	clone_test (SRC_SINC_FASTEST) ;
+#endif
+	puts("");
+
+	return 0 ;
+} /* main */