Initial commit

test/audio/helper.h

@@ -0,0 +1,68 @@
+#ifndef TEST_SOUND_HELPER_H
+#define TEST_SOUND_HELPER_H
+
+#include "audio/decoders/raw.h"
+
+#include "common/stream.h"
+#include "common/endian.h"
+
+#include <math.h>
+#include <limits>
+
+template<typename T>
+static T *createSine(const int sampleRate, const int time) {
+	T *sine = (T *)malloc(sizeof(T) * time * sampleRate);
+
+	const bool isUnsigned = !std::numeric_limits<T>::is_signed;
+	const T xorMask = isUnsigned ? (1 << (std::numeric_limits<T>::digits - 1)) : 0;
+	const T maxValue = std::numeric_limits<T>::max() ^ xorMask;
+
+	for (int i = 0; i < time * sampleRate; ++i)
+		sine[i] = ((T)(sin((double)i / sampleRate * 2 * M_PI) * maxValue)) ^ xorMask;
+
+	return sine;
+}
+
+template<typename T>
+static Audio::SeekableAudioStream *createSineStream(const int sampleRate, const int time, int16 **comp, bool le, bool isStereo) {
+	T *sine = createSine<T>(sampleRate, time * (isStereo ? 2 : 1));
+
+	const bool isUnsigned = !std::numeric_limits<T>::is_signed;
+	const T xorMask = isUnsigned ? (1 << (std::numeric_limits<T>::digits - 1)) : 0;
+	const bool is16Bits = (sizeof(T) == 2);
+	assert(sizeof(T) == 2 || sizeof(T) == 1);
+
+	const int samples = sampleRate * time * (isStereo ? 2 : 1);
+
+	if (comp) {
+		*comp = new int16[samples];
+		for (int i = 0; i < samples; ++i) {
+			if (is16Bits)
+				(*comp)[i] = sine[i] ^ xorMask;
+			else
+				(*comp)[i] = (sine[i] ^ xorMask) << 8;
+		}
+	}
+
+	if (is16Bits) {
+		if (le) {
+			for (int i = 0; i < samples; ++i)
+				WRITE_LE_UINT16(&sine[i], sine[i]);
+		} else {
+			for (int i = 0; i < samples; ++i)
+				WRITE_BE_UINT16(&sine[i], sine[i]);
+		}
+	}
+
+	Audio::SeekableAudioStream *s = 0;
+	Common::SeekableReadStream *sD = new Common::MemoryReadStream((const byte *)sine, sizeof(T) * samples, DisposeAfterUse::YES);
+	s = Audio::makeRawStream(sD, sampleRate,
+	                             (is16Bits ? Audio::FLAG_16BITS : 0)
+	                             | (isUnsigned ? Audio::FLAG_UNSIGNED : 0)
+	                             | (le ? Audio::FLAG_LITTLE_ENDIAN : 0)
+	                             | (isStereo ? Audio::FLAG_STEREO : 0));
+
+	return s;
+}
+
+#endif