#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