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113 lines
3.6 KiB
C++
113 lines
3.6 KiB
C++
#ifndef TEST_SOUND_HELPER_H
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#define TEST_SOUND_HELPER_H
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#include "sound/decoders/raw.h"
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#include "common/stream.h"
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#include "common/endian.h"
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#include <math.h>
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#include <limits>
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template<typename T>
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static T *createSine(const int sampleRate, const int time) {
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T *sine = (T *)malloc(sizeof(T) * time * sampleRate);
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const bool isUnsigned = !std::numeric_limits<T>::is_signed;
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const T xorMask = isUnsigned ? (1 << (std::numeric_limits<T>::digits - 1)) : 0;
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const T maxValue = std::numeric_limits<T>::max() ^ xorMask;
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for (int i = 0; i < time * sampleRate; ++i)
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sine[i] = ((T)(sin((double)i / sampleRate * 2 * PI) * maxValue)) ^ xorMask;
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return sine;
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}
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template<typename T>
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static Common::SeekableReadStream *createPartitionStream(T *sine, const int samples, Audio::RawStreamBlockList &blockList) {
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const int block1Len = samples / 2;
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const int block1Size = block1Len * sizeof(T);
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const int block2Len = samples - block1Len;
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const int block2Size = block2Len * sizeof(T);
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const int bufferLen = samples * 2;
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const int bufferSize = bufferLen * sizeof(T);
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T *partition = (T *)calloc(1, bufferSize);
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Audio::RawStreamBlock block;
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// The will layout the buffer like the following:
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// [Zero], [Part2], [Zero], [Part1]
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// The first part of the stream is at the end of the memory buffer
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block.pos = bufferSize - block1Size;
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block.len = block1Len;
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memcpy(partition + bufferLen - block1Len, sine, block1Size);
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blockList.push_back(block);
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// The second part of the stream is near the beginning of the memory buffer
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block.pos = block2Size;
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block.len = block2Len;
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memcpy(partition + block2Len, sine + block1Len, block2Size);
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blockList.push_back(block);
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free(sine);
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return new Common::MemoryReadStream((const byte *)partition, bufferSize, DisposeAfterUse::YES);
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}
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template<typename T>
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static Audio::SeekableAudioStream *createSineStream(const int sampleRate, const int time, int16 **comp, bool le, bool isStereo, bool makePartition = false) {
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T *sine = createSine<T>(sampleRate, time * (isStereo ? 2 : 1));
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const bool isUnsigned = !std::numeric_limits<T>::is_signed;
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const T xorMask = isUnsigned ? (1 << (std::numeric_limits<T>::digits - 1)) : 0;
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const bool is16Bits = (sizeof(T) == 2);
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assert(sizeof(T) == 2 || sizeof(T) == 1);
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const int samples = sampleRate * time * (isStereo ? 2 : 1);
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if (comp) {
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*comp = new int16[samples];
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for (int i = 0; i < samples; ++i) {
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if (is16Bits)
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(*comp)[i] = sine[i] ^ xorMask;
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else
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(*comp)[i] = (sine[i] ^ xorMask) << 8;
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}
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}
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if (is16Bits) {
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if (le) {
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for (int i = 0; i < samples; ++i)
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WRITE_LE_UINT16(&sine[i], sine[i]);
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} else {
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for (int i = 0; i < samples; ++i)
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WRITE_BE_UINT16(&sine[i], sine[i]);
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}
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}
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Audio::SeekableAudioStream *s = 0;
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if (makePartition) {
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Audio::RawStreamBlockList blockList;
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Common::SeekableReadStream *sD = createPartitionStream<T>(sine, samples, blockList);
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s = Audio::makeRawStream(sD, blockList, sampleRate,
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(is16Bits ? Audio::FLAG_16BITS : 0)
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| (isUnsigned ? Audio::FLAG_UNSIGNED : 0)
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| (le ? Audio::FLAG_LITTLE_ENDIAN : 0)
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| (isStereo ? Audio::FLAG_STEREO : 0));
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} else {
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Common::SeekableReadStream *sD = new Common::MemoryReadStream((const byte *)sine, sizeof(T) * samples, DisposeAfterUse::YES);
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s = Audio::makeRawStream(sD, sampleRate,
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(is16Bits ? Audio::FLAG_16BITS : 0)
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| (isUnsigned ? Audio::FLAG_UNSIGNED : 0)
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| (le ? Audio::FLAG_LITTLE_ENDIAN : 0)
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| (isStereo ? Audio::FLAG_STEREO : 0));
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}
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return s;
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}
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#endif
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