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#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
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