1 files changed, 112 insertions, 0 deletions
diff --git a/test/audio/helper.h b/test/audio/helper.h
new file mode 100644
index 0000000000..262ca1c060
--- /dev/null
+++ b/test/audio/helper.h
@@ -0,0 +1,112 @@
+#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 * PI) * maxValue)) ^ xorMask;
+
+	return sine;
+}
+
+template<typename T>
+static Common::SeekableReadStream *createPartitionStream(T *sine, const int samples, Audio::RawStreamBlockList &blockList) {
+	const int block1Len = samples / 2;
+	const int block1Size = block1Len * sizeof(T);
+	const int block2Len = samples - block1Len;
+	const int block2Size = block2Len * sizeof(T);
+
+	const int bufferLen = samples * 2;
+	const int bufferSize = bufferLen * sizeof(T);
+	T *partition = (T *)calloc(1, bufferSize);
+
+	Audio::RawStreamBlock block;
+
+	// The will layout the buffer like the following:
+	// [Zero], [Part2], [Zero], [Part1]
+
+	// The first part of the stream is at the end of the memory buffer
+	block.pos = bufferSize - block1Size;
+	block.len = block1Len;
+	memcpy(partition + bufferLen - block1Len, sine, block1Size);
+	blockList.push_back(block);
+
+	// The second part of the stream is near the beginning of the memory buffer
+	block.pos = block2Size;
+	block.len = block2Len;
+	memcpy(partition + block2Len, sine + block1Len, block2Size);
+	blockList.push_back(block);
+
+	free(sine);
+
+	return new Common::MemoryReadStream((const byte *)partition, bufferSize, DisposeAfterUse::YES);
+}
+
+template<typename T>
+static Audio::SeekableAudioStream *createSineStream(const int sampleRate, const int time, int16 **comp, bool le, bool isStereo, bool makePartition = false) {
+	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;
+	if (makePartition) {
+		Audio::RawStreamBlockList blockList;
+		Common::SeekableReadStream *sD = createPartitionStream<T>(sine, samples, blockList);
+		s = Audio::makeRawStream(sD, blockList, sampleRate,
+		                             (is16Bits ? Audio::FLAG_16BITS : 0)
+		                             | (isUnsigned ? Audio::FLAG_UNSIGNED : 0)
+		                             | (le ? Audio::FLAG_LITTLE_ENDIAN : 0)
+		                             | (isStereo ? Audio::FLAG_STEREO : 0));
+	} else {
+		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
+