Import from shared project.

1 files changed, 112 insertions, 0 deletions

diff --git a/src/test_audio.h b/src/test_audio.h
new file mode 100644
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--- /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__*/