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#include "audio.hpp"
#include <cstring>
/// -----------------------------------------------------------------------------------
/// @class Audio (base & template class with specializations)
/// @brief General audio handling class, which both initializes & uninitializes audio.
/// -----------------------------------------------------------------------------------
/// Preprocessor definitions:
#define __glox_autocode(data)\
::fread(__ftype, sizeof(char), 4, __file); if(!::strcmp(__ftype, data)) return false;
#define __glox_autocode2(data)\
(__ftype[0] == data[0]) && (__ftype[1] == data[1]) && (__ftype[2] == data[2]) && (__ftype[3] == data[3])
/// Static variable initializations:
template<int I> ::ALCcontext* glox::Audio<I>::ms_opContext = nullptr;
template<int I> ::ALCdevice* glox::Audio<I>::ms_opDevice = nullptr;
/// Constructors & destructors:
template<int I>
glox::Audio<I>::Audio(const char* device){
Audio<I>::Init(*this, device);
}
template<int I>
glox::Audio<I>::~Audio(void){
Audio<I>::Close(*this);
}
/// Member functions:
template<int I>
void glox::Audio<I>::Close(Audio& audio){
::alcMakeContextCurrent(NULL);
::alcDestroyContext(ms_opContext);
::alcCloseDevice(ms_opDevice);
}
template<int I>
void glox::Audio<I>::Init(Audio& audio, const char* device){
ms_opDevice = ::alcOpenDevice(device);
ms_opContext = ::alcCreateContext(ms_opDevice, NULL);
::alcMakeContextCurrent(ms_opContext);
}
/// -------------------------------------------------------------
/// @class Audio<AUDIO_LISTENER> (template specialization)
/// @brief In-game audio listener from which audio can be heard.
/// -------------------------------------------------------------
/// Static member functions:
void glox::AudioListener_t::SetOrientation(::ALfloat x, ::ALfloat y, ::ALfloat z){
::alListener3f(AL_ORIENTATION, x, y, z);
}
void glox::AudioListener_t::SetPosition(::ALfloat x, ::ALfloat y, ::ALfloat z){
::alListener3f(AL_POSITION, x, y, z);
}
void glox::AudioListener_t::SetVelocity(::ALfloat x, ::ALfloat y, ::ALfloat z){
::alListener3f(AL_VELOCITY, x, y, z);
}
/// ----------------------------------------------------
/// @class Audio<AUDIO_SOUND> (template specialization)
/// @brief In-game sound source class.
/// ----------------------------------------------------
/// Constructors & destructors:
glox::AudioSound_t::Audio(const char* file) : m_fGain(1.0f), m_fPitch(1.0f), m_bLooping(false), m_cpFile(file){
m_fOri[0] = m_fOri[1] = m_fOri[2] = m_fPos[0] = m_fPos[1] = m_fPos[2] = m_fVel[0] = m_fVel[1] = m_fVel[2] = 0.0f;
}
glox::AudioSound_t::~Audio(void){
delete[] m_ucpBuffer;
::alDeleteBuffers(1, &m_uiBuffer);
::alDeleteSources(1, &m_uiSource);
}
/// Member variables:
void glox::AudioSound_t::Pause(void){
::alSourcePause(m_uiSource);
}
void glox::AudioSound_t::Play(void){
::alSourcePlay(m_uiSource);
system("PAUSE");
}
void glox::AudioSound_t::SetChanges(void){
AudioSound_t::LoadFile(*this);
}
void glox::AudioSound_t::Stop(void){
::alSourceStop(m_uiSource);
}
/// Static member functions:
bool glox::AudioSound_t::LoadFile(Audio& audio){
// Open requested file (if found):
::FILE* __file = ::fopen(audio.m_cpFile, "rb");
if(!__file) return false;
// Check .wav file validness:
char __ftype[4];
unsigned long __avg_bytes_psec, __rate_sample, __size = 0, __size_chunk, __size_data;
__glox_autocode("RIFF");
::fread(&__size, sizeof(unsigned long), 1, __file);
__glox_autocode("WAVE");
__glox_autocode("fmt ");
// Check & read .wav file data:
short __bits_psample, __bytes_psample, __channels, __type_format;
::fread(&__size_chunk, sizeof(unsigned long), 1, __file);
::fread(&__type_format, sizeof(short), 1, __file);
::fread(&__channels, sizeof(short), 1, __file);
::fread(&__rate_sample, sizeof(unsigned long), 1, __file);
::fread(&__avg_bytes_psec, sizeof(unsigned long), 1, __file);
::fread(&__bytes_psample, sizeof(short), 1, __file);
::fread(&__bits_psample, sizeof(short), 1, __file);
__glox_autocode("data");
// Read data into the buffer (memory allocation process) & generate both the buffers & the sources:
::fread(&__size_data, sizeof(unsigned long), 1, __file);
audio.m_ucpBuffer = new unsigned char[__size_data];
::fread(audio.m_ucpBuffer, sizeof(unsigned char), __size_data, __file);
::alGenBuffers(1, &audio.m_uiBuffer);
::alGenSources(1, &audio.m_uiSource);
::fclose(__file); // The file is not needed anymore (thanks to buffers), so it will be closed.
::ALenum __format = NULL;
if(__bits_psample == 8){
if(__channels == 1){
__format = AL_FORMAT_MONO8;
}
else if(__channels == 2){
__format = AL_FORMAT_STEREO8;
}
}
else if(__bits_psample == 16){
if(__channels == 1){
__format = AL_FORMAT_MONO16;
}
else if(__channels == 2){
__format = AL_FORMAT_STEREO16;
}
}
::alBufferData(audio.m_uiBuffer, __format, audio.m_ucpBuffer, __size_data, __rate_sample);
// Set source properties:
alSourcei(audio.m_uiSource, AL_BUFFER, audio.m_uiBuffer);
alSourcef(audio.m_uiSource, AL_PITCH, audio.m_fPitch);
alSourcef(audio.m_uiSource, AL_GAIN, audio.m_fGain);
alSourcefv(audio.m_uiSource, AL_ORIENTATION, audio.m_fOri);
alSourcefv(audio.m_uiSource, AL_POSITION, audio.m_fPos);
alSourcefv(audio.m_uiSource, AL_VELOCITY, audio.m_fVel);
alSourcei(audio.m_uiSource, AL_LOOPING, audio.m_bLooping);
return true;
}
#undef __glox_autocode
#undef __glox_autocode2
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