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/*
audio/audio.cc
This file is part of the Osirion project and is distributed under
the terms of the GNU General Public License version 2
*/
#include "audio/audio.h"
#include "audio/buffers.h"
#include "audio/pcm.h"
#include "audio/sources.h"
#include "sys/sys.h"
namespace audio
{
ALCdevice *audio_device = 0;
ALCcontext *audio_context = 0;
void init()
{
con_print << "^BInitializing audio..." << std::endl;
// open the default audio device
audio_device = alcOpenDevice(0);
if (!audio_device) {
con_warn << "Could not initialize audio!" << std::endl;
return;
}
// create the audio context
audio_context = alcCreateContext(audio_device , 0);
if (!audio_context) {
alcCloseDevice(audio_device);
audio_device = 0;
con_warn << "Could not create audio context!" << std::endl;
return;
}
alcMakeContextCurrent(audio_context);
// clear errors
alGetError();
Buffers::init();
Sources::init();
//con_debug << " audio device ^B" << alcGetString(audio_device, ALC_DEFAULT_DEVICE_SPECIFIER) << std::endl;
// the "no sound" sound
load("ui/nosnd");
// console sound
load("ui/console");
}
void reset()
{
con_print << "^BInitializing audio..." << std::endl;
Sources::shutdown();
Buffers::shutdown();
Buffers::init();
Sources::init();
load("ui/nosnd");
load("ui/console");
}
void load(const char *name)
{
Buffers::load(std::string(name));
}
void shutdown()
{
con_print << "^BShutting down audio..." << std::endl;
Sources::shutdown();
Buffers::shutdown();
if (audio_context) {
alcMakeContextCurrent(0);
alcDestroyContext(audio_context);
audio_context = 0;
}
if (audio_device) {
alcCloseDevice(audio_device);
audio_device = 0;
}
}
size_t play(const char *name)
{
if (!audio_context)
return 0;
size_t buffer_index = Buffers::load(std::string(name));
for (size_t i = 0; i < MAXUISOURCES; i++) {
ALint srcstate = 0;
ALuint source = Sources::source(i);
alGetSourcei(source , AL_SOURCE_STATE , &srcstate);
if (srcstate != AL_PLAYING) {
Buffers::bind(source, buffer_index);
alSourcef(source, AL_PITCH, 1.0);
alSourcef(source, AL_GAIN, 1.0);
alSourcei(source, AL_SOURCE_RELATIVE, AL_TRUE);
ALfloat location[] = {0.0f, 0.0f, 0.0f};
alSourcefv(source, AL_POSITION, location);
alSourceRewind(source);
alSourcePlay(source);
return buffer_index;
}
}
return 0;
}
size_t play(size_t source_index, size_t buffer_index, float pitch, float gain)
{
if (!audio_context || !buffer_index)
return 0;
ALuint source = Sources::source(source_index);
ALint srcstate = 0;
alGetSourcei(source , AL_SOURCE_STATE , &srcstate);
if (srcstate == AL_PLAYING) {
alSourceStop(source);
}
Buffers::bind(source, buffer_index);
alSourcei(source, AL_SOURCE_RELATIVE, AL_FALSE);
alSourcef(source, AL_PITCH, pitch);
alSourcef(source, AL_GAIN, gain);
alSourcei(source, AL_LOOPING, AL_FALSE);
alSourceRewind(source);
alSourcePlay(source);
return buffer_index;
}
size_t loop(size_t source_index, size_t buffer_index, float pitch, float gain)
{
if (!audio_context || !buffer_index)
return 0;
ALuint source = Sources::source(source_index);
ALint srcstate = 0;
alGetSourcei(source , AL_SOURCE_STATE , &srcstate);
if (srcstate == AL_PLAYING) {
alSourceStop(source);
}
Buffers::bind(source, buffer_index);
//alSourcef(source, AL_REFERENCE_DISTANCE, 2.0f); // might be the cause of cracks in the sound
alSourcei(source, AL_SOURCE_RELATIVE, AL_FALSE);
alSourcef(source, AL_PITCH, pitch);
alSourcef(source, AL_GAIN, gain);
alSourcei(source, AL_LOOPING, AL_TRUE);
alSourceRewind(source);
alSourcePlay(source);
return buffer_index;
}
size_t loop(size_t source_index, const char *name, float pitch, float gain)
{
if (!audio_context)
return 0;
size_t buffer_index = Buffers::load(std::string(name));
if (buffer_index)
loop(source_index, buffer_index, pitch, gain);
return buffer_index;
}
void update_listener(math::Vector3f const &location, math::Axis const &axis, math::Vector3f const & velocity, float gain)
{
if (!audio_context)
return;
alListenerfv(AL_POSITION, location.ptr());
ALfloat orientation[6];
for (size_t i = 0; i < 3; i++) {
orientation[i] = axis.forward()[i];
orientation[i+3] = axis.up()[i];
}
alListenerfv(AL_ORIENTATION, orientation);
alListenerf(AL_GAIN, gain);
alListenerfv(AL_VELOCITY, velocity.ptr());
}
void update_source(size_t source_index, math::Vector3f const & location, math::Vector3f const & velocity, float pitch, float gain)
{
if (!audio_context)
return;
ALuint source = Sources::source(source_index);
alSourcefv(source, AL_POSITION, location.ptr());
alSourcefv(source, AL_VELOCITY, velocity.ptr());
alSourcef(source, AL_PITCH, pitch);
alSourcef(source, AL_GAIN, gain);
}
}
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