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authorBent Bisballe Nyeng <deva@aasimon.org>2014-06-24 08:13:32 +0200
committerBent Bisballe Nyeng <deva@aasimon.org>2014-06-24 08:13:32 +0200
commit0c835dce3bf01dc31b33311378043b3799150a64 (patch)
tree65197c9aa5eec4cedf9bbf9156b9165532d257df /src/test_audio.h
Import from shared project.
Diffstat (limited to 'src/test_audio.h')
-rw-r--r--src/test_audio.h112
1 files changed, 112 insertions, 0 deletions
diff --git a/src/test_audio.h b/src/test_audio.h
new file mode 100644
index 0000000..68dac67
--- /dev/null
+++ b/src/test_audio.h
@@ -0,0 +1,112 @@
+/* -*- mode: c++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ * File: test_audio.h
+ * This file belongs to the Bifrost project.
+ * [FILL IN DESCRIPTION HERE]
+ * Date: Wed Feb 3 08:04:33 CET 2010
+ * Author: Bent Bisballe Nyeng
+ * Copyright: 2010
+ * Email: deva@aasimon.org
+ ****************************************************************************/
+#ifndef __BIFROST_TEST_AUDIO_H__
+#define __BIFROST_TEST_AUDIO_H__
+
+#include <math.h>
+#include <time.h>
+#include <stdlib.h>
+
+#ifdef VERBOSE
+#include <stdio.h>
+#endif
+
+static inline size_t getBufferSize(size_t samples, size_t channels)
+{
+ return samples * channels * sizeof(short);
+}
+
+static inline char *getBuffer(size_t samples, size_t channels)
+{
+ return (char*)calloc(getBufferSize(samples, channels), 1);
+}
+
+static inline char *getSineBuffer(size_t samples, size_t channels,
+ size_t srate, size_t freq)
+{
+ short *s = (short*)getBuffer(samples, channels);
+ for(size_t i = 0; i < samples; i++) {
+ double x = (double)i / (double)srate;
+ double val = sin(x * 2 * M_PI * freq);
+
+ for(size_t c = 0; c < channels; c++) {
+ s[(i * channels) + c] = val * 32500;
+ }
+
+ }
+ return (char*)s;
+}
+
+static inline char *getNoiseBuffer(size_t samples, size_t channels)
+{
+ srand(time(NULL));
+ short *s = (short*)getBuffer(samples, channels);
+ for(size_t i = 0; i < samples; i++) {
+ for(size_t c = 0; c < channels; c++) {
+ s[(i * channels) + c] = (rand() % 65000) - 32500;
+ }
+ }
+ return (char*)s;
+}
+
+static inline void normaliseBuffer(size_t samples, size_t channels, char *buf)
+{
+ int max = 0;
+
+ short *s = (short*)buf;
+ for(size_t i = 0; i < samples; i++) {
+ for(size_t c = 0; c < channels; c++) {
+ if(max < abs(s[(i * channels) + c])) max = abs(s[(i * channels) + c]);
+ }
+ }
+
+ for(size_t i = 0; i < samples; i++) {
+ for(size_t c = 0; c < channels; c++) {
+ s[(i * channels) + c] *= 32500/max;
+ }
+ }
+
+}
+
+static inline double compareBuffers(size_t samples, size_t channels, char *buf1, char *buf2)
+{
+ double diff = 0.0;
+
+#ifdef NORM
+ normaliseBuffer(samples, channels, buf1);
+ normaliseBuffer(samples, channels, buf2);
+#endif
+
+ short *s1 = (short*)buf1;
+ short *s2 = (short*)buf2;
+
+ for(size_t i = 0; i < samples; i++) {
+ for(size_t c = 0; c < channels; c++) {
+ diff += (double)abs(s1[(i * channels) + c] - s2[(i * channels) + c]) / (double)(samples*channels);
+#ifdef VERBOSE
+ if(c == 0) fprintf(stderr, "%d\t%d\t~%d\t: %f\n",
+ s1[(i * channels) + c], s2[(i * channels) + c],
+ s1[(i * channels) + c] - s2[(i * channels) + c],
+ diff);
+#endif
+
+ }
+ }
+
+#ifdef VERBOSE
+ fprintf(stderr, "Diff: %f\n", diff);
+#endif
+
+ return diff;
+}
+
+
+#endif/*__BIFROST_TEST_AUDIO_H__*/