minetest/src/sound_openal.cpp

323 lines
7.4 KiB
C++
Raw Normal View History

/*
Minetest-c55
Copyright (C) 2012 celeron55, Perttu Ahola <celeron55@gmail.com>
OpenAL support based on work by:
Copyright (C) 2011 Sebastian 'Bahamada' Rühl
Copyright (C) 2011 Cyriaque 'Cisoun' Skrapits <cysoun@gmail.com>
Copyright (C) 2011 Giuseppe Bilotta <giuseppe.bilotta@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; ifnot, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "sound_openal.h"
#if defined(_MSC_VER)
#include <al.h>
#include <alc.h>
#include <alext.h>
#elif defined(__APPLE__)
#include <OpenAL/al.h>
#include <OpenAL/alc.h>
#include <OpenAL/alext.h>
#else
#include <AL/al.h>
#include <AL/alc.h>
#include <AL/alext.h>
#endif
#include <vorbis/vorbisfile.h>
#include "log.h"
#include <map>
#include <vector>
#include "utility.h" // myrand()
#define BUFFER_SIZE 30000
static const char *alcErrorString(ALCenum err)
{
switch (err) {
case ALC_NO_ERROR:
return "no error";
case ALC_INVALID_DEVICE:
return "invalid device";
case ALC_INVALID_CONTEXT:
return "invalid context";
case ALC_INVALID_ENUM:
return "invalid enum";
case ALC_INVALID_VALUE:
return "invalid value";
case ALC_OUT_OF_MEMORY:
return "out of memory";
default:
return "<unknown OpenAL error>";
}
}
static const char *alErrorString(ALenum err)
{
switch (err) {
case AL_NO_ERROR:
return "no error";
case AL_INVALID_NAME:
return "invalid name";
case AL_INVALID_ENUM:
return "invalid enum";
case AL_INVALID_VALUE:
return "invalid value";
case AL_INVALID_OPERATION:
return "invalid operation";
case AL_OUT_OF_MEMORY:
return "out of memory";
default:
return "<unknown OpenAL error>";
}
}
void f3_set(ALfloat *f3, v3f v)
{
f3[0] = v.X;
f3[1] = v.Y;
f3[2] = v.Z;
}
struct SoundBuffer
{
ALenum format;
ALsizei freq;
ALuint bufferID;
std::vector<char> buffer;
};
SoundBuffer* loadOggFile(const std::string &filepath)
{
int endian = 0; // 0 for Little-Endian, 1 for Big-Endian
int bitStream;
long bytes;
char array[BUFFER_SIZE]; // Local fixed size array
vorbis_info *pInfo;
OggVorbis_File oggFile;
// Try opening the given file
if(ov_fopen(filepath.c_str(), &oggFile) != 0)
{
infostream<<"Audio: Error opening "<<filepath<<" for decoding"<<std::endl;
return NULL;
}
SoundBuffer *snd = new SoundBuffer;
// Get some information about the OGG file
pInfo = ov_info(&oggFile, -1);
// Check the number of channels... always use 16-bit samples
if(pInfo->channels == 1)
snd->format = AL_FORMAT_MONO16;
else
snd->format = AL_FORMAT_STEREO16;
// The frequency of the sampling rate
snd->freq = pInfo->rate;
// Keep reading until all is read
do
{
// Read up to a buffer's worth of decoded sound data
bytes = ov_read(&oggFile, array, BUFFER_SIZE, endian, 2, 1, &bitStream);
if(bytes < 0)
{
ov_clear(&oggFile);
infostream<<"Audio: Error decoding "<<filepath<<std::endl;
return NULL;
}
// Append to end of buffer
snd->buffer.insert(snd->buffer.end(), array, array + bytes);
} while (bytes > 0);
alGenBuffers(1, &snd->bufferID);
alBufferData(snd->bufferID, snd->format,
&(snd->buffer[0]), snd->buffer.size(),
snd->freq);
ALenum error = alGetError();
if(error != AL_NO_ERROR){
infostream<<"Audio: OpenAL error: "<<alErrorString(error)
<<"preparing sound buffer"<<std::endl;
}
infostream<<"Audio file "<<filepath<<" loaded"<<std::endl;
// Clean up!
ov_clear(&oggFile);
return snd;
}
struct PlayingSound
{
};
class OpenALSoundManager: public ISoundManager
{
private:
ALCdevice *m_device;
ALCcontext *m_context;
bool m_can_vorbis;
int m_next_id;
std::map<std::string, std::vector<SoundBuffer*> > m_buffers;
std::map<int, PlayingSound*> m_sounds_playing;
public:
OpenALSoundManager():
m_device(NULL),
m_context(NULL),
m_can_vorbis(false),
m_next_id(1)
{
ALCenum error = ALC_NO_ERROR;
infostream<<"Audio: Initializing..."<<std::endl;
m_device = alcOpenDevice(NULL);
if(!m_device){
infostream<<"Audio: No audio device available, audio system "
<<"not initialized"<<std::endl;
return;
}
if(alcIsExtensionPresent(m_device, "EXT_vorbis")){
infostream<<"Audio: Vorbis extension present"<<std::endl;
m_can_vorbis = true;
} else{
infostream<<"Audio: Vorbis extension NOT present"<<std::endl;
m_can_vorbis = false;
}
m_context = alcCreateContext(m_device, NULL);
if(!m_context){
error = alcGetError(m_device);
infostream<<"Audio: Unable to initialize audio context, "
<<"aborting audio initialization ("<<alcErrorString(error)
<<")"<<std::endl;
alcCloseDevice(m_device);
m_device = NULL;
return;
}
if(!alcMakeContextCurrent(m_context) ||
(error = alcGetError(m_device) != ALC_NO_ERROR))
{
infostream<<"Audio: Error setting audio context, aborting audio "
<<"initialization ("<<alcErrorString(error)<<")"<<std::endl;
alcDestroyContext(m_context);
m_context = NULL;
alcCloseDevice(m_device);
m_device = NULL;
return;
}
alDistanceModel(AL_EXPONENT_DISTANCE);
infostream<<"Audio: Initialized: OpenAL "<<alGetString(AL_VERSION)
<<", using "<<alcGetString(m_device, ALC_DEVICE_SPECIFIER)
<<std::endl;
}
~OpenALSoundManager()
{
infostream<<"Audio: Deinitializing..."<<std::endl;
// KABOOM!
// TODO: Clear SoundBuffers
alcMakeContextCurrent(NULL);
alcDestroyContext(m_context);
m_context = NULL;
alcCloseDevice(m_device);
m_device = NULL;
infostream<<"Audio: Deinitialized."<<std::endl;
}
void addBuffer(const std::string &name, SoundBuffer *buf)
{
std::map<std::string, std::vector<SoundBuffer*> >::iterator i =
m_buffers.find(name);
if(i != m_buffers.end()){
i->second.push_back(buf);
return;
}
std::vector<SoundBuffer*> bufs;
bufs.push_back(buf);
return;
}
SoundBuffer* getBuffer(const std::string &name)
{
std::map<std::string, std::vector<SoundBuffer*> >::iterator i =
m_buffers.find(name);
if(i == m_buffers.end())
return NULL;
std::vector<SoundBuffer*> &bufs = i->second;
int j = myrand() % bufs.size();
return bufs[j];
}
void updateListener(v3f pos, v3f vel, v3f at, v3f up)
{
ALfloat f[6];
f3_set(f, pos);
alListenerfv(AL_POSITION, f);
f3_set(f, vel);
alListenerfv(AL_VELOCITY, f);
f3_set(f, at);
f3_set(f+3, up);
alListenerfv(AL_ORIENTATION, f);
}
bool loadSound(const std::string &name,
const std::string &filepath)
{
SoundBuffer *buf = loadOggFile(filepath);
if(buf)
addBuffer(name, buf);
return false;
}
bool loadSound(const std::string &name,
const std::vector<char> &filedata)
{
errorstream<<"OpenALSoundManager: Loading from filedata not"
" implemented"<<std::endl;
return false;
}
int playSound(const std::string &name, int loopcount,
float volume)
{
return -1;
}
int playSoundAt(const std::string &name, int loopcount,
v3f pos, float volume)
{
return -1;
}
void stopSound(int sound)
{
}
};
ISoundManager *createSoundManager()
{
return new OpenALSoundManager();
};