minetest/src/sound_openal.cpp

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/*
2013-02-24 18:40:43 +01:00
Minetest
2013-02-24 19:38:45 +01:00
Copyright (C) 2013 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 Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser 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(_WIN32)
#include <al.h>
#include <alc.h>
//#include <alext.h>
#elif defined(__APPLE__)
#include <OpenAL/al.h>
#include <OpenAL/alc.h>
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//#include <OpenAL/alext.h>
#else
#include <AL/al.h>
#include <AL/alc.h>
#include <AL/alext.h>
#endif
#include <vorbis/vorbisfile.h>
#include <assert.h>
#include "log.h"
#include "util/numeric.h" // myrand()
#include "porting.h"
#include <vector>
#include <fstream>
#include <unordered_map>
#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>";
}
}
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static ALenum warn_if_error(ALenum err, const char *desc)
{
if(err == AL_NO_ERROR)
return err;
warningstream<<desc<<": "<<alErrorString(err)<<std::endl;
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return err;
}
void f3_set(ALfloat *f3, v3f v)
{
f3[0] = v.X;
f3[1] = v.Y;
f3[2] = v.Z;
}
struct SoundBuffer
{
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ALenum format;
ALsizei freq;
ALuint buffer_id;
std::vector<char> buffer;
};
SoundBuffer *load_opened_ogg_file(OggVorbis_File *oggFile,
const std::string &filename_for_logging)
{
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;
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 "
<< filename_for_logging << std::endl;
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delete snd;
return NULL;
}
// Append to end of buffer
snd->buffer.insert(snd->buffer.end(), array, array + bytes);
} while (bytes > 0);
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alGenBuffers(1, &snd->buffer_id);
alBufferData(snd->buffer_id, 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 "
<< filename_for_logging << " loaded" << std::endl;
// Clean up!
ov_clear(oggFile);
return snd;
}
SoundBuffer *load_ogg_from_file(const std::string &path)
{
OggVorbis_File oggFile;
// Try opening the given file.
// This requires libvorbis >= 1.3.2, as
// previous versions expect a non-const char *
if (ov_fopen(path.c_str(), &oggFile) != 0) {
infostream << "Audio: Error opening " << path
<< " for decoding" << std::endl;
return NULL;
}
return load_opened_ogg_file(&oggFile, path);
}
struct BufferSource {
const char *buf;
size_t cur_offset;
size_t len;
};
size_t buffer_sound_read_func(void *ptr, size_t size, size_t nmemb, void *datasource)
{
BufferSource *s = (BufferSource *)datasource;
size_t copied_size = MYMIN(s->len - s->cur_offset, size);
memcpy(ptr, s->buf + s->cur_offset, copied_size);
s->cur_offset += copied_size;
return copied_size;
}
int buffer_sound_seek_func(void *datasource, ogg_int64_t offset, int whence)
{
BufferSource *s = (BufferSource *)datasource;
if (whence == SEEK_SET) {
if (offset < 0 || (size_t)MYMAX(offset, 0) >= s->len) {
// offset out of bounds
return -1;
}
s->cur_offset = offset;
return 0;
} else if (whence == SEEK_CUR) {
if ((size_t)MYMIN(-offset, 0) > s->cur_offset
|| s->cur_offset + offset > s->len) {
// offset out of bounds
return -1;
}
s->cur_offset += offset;
return 0;
}
// invalid whence param (SEEK_END doesn't have to be supported)
return -1;
}
long BufferSourceell_func(void *datasource)
{
BufferSource *s = (BufferSource *)datasource;
return s->cur_offset;
}
static ov_callbacks g_buffer_ov_callbacks = {
&buffer_sound_read_func,
&buffer_sound_seek_func,
NULL,
&BufferSourceell_func
};
SoundBuffer *load_ogg_from_buffer(const std::string &buf, const std::string &id_for_log)
{
OggVorbis_File oggFile;
BufferSource s;
s.buf = buf.c_str();
s.cur_offset = 0;
s.len = buf.size();
if (ov_open_callbacks(&s, &oggFile, NULL, 0, g_buffer_ov_callbacks) != 0) {
infostream << "Audio: Error opening " << id_for_log
<< " for decoding" << std::endl;
return NULL;
}
return load_opened_ogg_file(&oggFile, id_for_log);
}
struct PlayingSound
{
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ALuint source_id;
bool loop;
};
class OpenALSoundManager: public ISoundManager
{
private:
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OnDemandSoundFetcher *m_fetcher;
ALCdevice *m_device;
ALCcontext *m_context;
int m_next_id;
std::unordered_map<std::string, std::vector<SoundBuffer*>> m_buffers;
std::unordered_map<int, PlayingSound*> m_sounds_playing;
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v3f m_listener_pos;
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struct FadeState {
FadeState() {}
FadeState(float step, float current_gain, float target_gain):
step(step),
current_gain(current_gain),
target_gain(target_gain) {}
float step;
float current_gain;
float target_gain;
};
std::unordered_map<int, FadeState> m_sounds_fading;
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float m_fade_delay;
public:
bool m_is_initialized;
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OpenALSoundManager(OnDemandSoundFetcher *fetcher):
m_fetcher(fetcher),
m_device(NULL),
m_context(NULL),
m_next_id(1),
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m_fade_delay(0),
m_is_initialized(false)
{
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;
}
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_INVERSE_DISTANCE);
infostream<<"Audio: Initialized: OpenAL "<<alGetString(AL_VERSION)
<<", using "<<alcGetString(m_device, ALC_DEVICE_SPECIFIER)
<<std::endl;
m_is_initialized = true;
}
~OpenALSoundManager()
{
infostream<<"Audio: Deinitializing..."<<std::endl;
// KABOOM!
// TODO: Clear SoundBuffers
alcMakeContextCurrent(NULL);
alcDestroyContext(m_context);
m_context = NULL;
alcCloseDevice(m_device);
m_device = NULL;
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for (std::unordered_map<std::string, std::vector<SoundBuffer*>>::iterator i =
m_buffers.begin(); i != m_buffers.end(); ++i) {
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for (std::vector<SoundBuffer*>::iterator iter = (*i).second.begin();
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iter != (*i).second.end(); ++iter) {
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delete *iter;
}
(*i).second.clear();
}
m_buffers.clear();
infostream<<"Audio: Deinitialized."<<std::endl;
}
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void step(float dtime)
{
doFades(dtime);
}
void addBuffer(const std::string &name, SoundBuffer *buf)
{
std::unordered_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);
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m_buffers[name] = bufs;
return;
}
SoundBuffer* getBuffer(const std::string &name)
{
std::unordered_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];
}
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PlayingSound* createPlayingSound(SoundBuffer *buf, bool loop,
float volume, float pitch)
{
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infostream<<"OpenALSoundManager: Creating playing sound"<<std::endl;
assert(buf);
PlayingSound *sound = new PlayingSound;
assert(sound);
warn_if_error(alGetError(), "before createPlayingSound");
alGenSources(1, &sound->source_id);
alSourcei(sound->source_id, AL_BUFFER, buf->buffer_id);
alSourcei(sound->source_id, AL_SOURCE_RELATIVE, true);
alSource3f(sound->source_id, AL_POSITION, 0, 0, 0);
alSource3f(sound->source_id, AL_VELOCITY, 0, 0, 0);
alSourcei(sound->source_id, AL_LOOPING, loop ? AL_TRUE : AL_FALSE);
volume = MYMAX(0.0, volume);
alSourcef(sound->source_id, AL_GAIN, volume);
alSourcef(sound->source_id, AL_PITCH, pitch);
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alSourcePlay(sound->source_id);
warn_if_error(alGetError(), "createPlayingSound");
return sound;
}
PlayingSound* createPlayingSoundAt(SoundBuffer *buf, bool loop,
float volume, v3f pos, float pitch)
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{
infostream<<"OpenALSoundManager: Creating positional playing sound"
<<std::endl;
assert(buf);
PlayingSound *sound = new PlayingSound;
assert(sound);
warn_if_error(alGetError(), "before createPlayingSoundAt");
alGenSources(1, &sound->source_id);
alSourcei(sound->source_id, AL_BUFFER, buf->buffer_id);
alSourcei(sound->source_id, AL_SOURCE_RELATIVE, false);
alSource3f(sound->source_id, AL_POSITION, pos.X, pos.Y, pos.Z);
alSource3f(sound->source_id, AL_VELOCITY, 0, 0, 0);
alSourcef(sound->source_id, AL_REFERENCE_DISTANCE, 30.0);
alSourcei(sound->source_id, AL_LOOPING, loop ? AL_TRUE : AL_FALSE);
volume = MYMAX(0.0, volume);
alSourcef(sound->source_id, AL_GAIN, volume);
alSourcef(sound->source_id, AL_PITCH, pitch);
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alSourcePlay(sound->source_id);
warn_if_error(alGetError(), "createPlayingSoundAt");
return sound;
}
int playSoundRaw(SoundBuffer *buf, bool loop, float volume, float pitch)
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{
assert(buf);
PlayingSound *sound = createPlayingSound(buf, loop, volume, pitch);
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if(!sound)
return -1;
int id = m_next_id++;
m_sounds_playing[id] = sound;
return id;
}
int playSoundRawAt(SoundBuffer *buf, bool loop, float volume, v3f pos, float pitch)
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{
assert(buf);
PlayingSound *sound = createPlayingSoundAt(buf, loop, volume, pos, pitch);
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if(!sound)
return -1;
int id = m_next_id++;
m_sounds_playing[id] = sound;
return id;
}
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void deleteSound(int id)
{
std::unordered_map<int, PlayingSound*>::iterator i = m_sounds_playing.find(id);
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if(i == m_sounds_playing.end())
return;
PlayingSound *sound = i->second;
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alDeleteSources(1, &sound->source_id);
delete sound;
m_sounds_playing.erase(id);
}
/* If buffer does not exist, consult the fetcher */
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SoundBuffer* getFetchBuffer(const std::string &name)
{
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SoundBuffer *buf = getBuffer(name);
if(buf)
return buf;
if(!m_fetcher)
return NULL;
std::set<std::string> paths;
std::set<std::string> datas;
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m_fetcher->fetchSounds(name, paths, datas);
for(std::set<std::string>::iterator i = paths.begin();
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i != paths.end(); ++i){
loadSoundFile(name, *i);
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}
for(std::set<std::string>::iterator i = datas.begin();
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i != datas.end(); ++i){
loadSoundData(name, *i);
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}
return getBuffer(name);
}
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// Remove stopped sounds
void maintain()
{
verbosestream<<"OpenALSoundManager::maintain(): "
<<m_sounds_playing.size()<<" playing sounds, "
<<m_buffers.size()<<" sound names loaded"<<std::endl;
std::set<int> del_list;
for(std::unordered_map<int, PlayingSound*>::iterator i = m_sounds_playing.begin();
i != m_sounds_playing.end(); ++i) {
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int id = i->first;
PlayingSound *sound = i->second;
// If not playing, remove it
{
ALint state;
alGetSourcei(sound->source_id, AL_SOURCE_STATE, &state);
if(state != AL_PLAYING){
del_list.insert(id);
}
}
}
if(!del_list.empty())
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verbosestream<<"OpenALSoundManager::maintain(): deleting "
<<del_list.size()<<" playing sounds"<<std::endl;
for(std::set<int>::iterator i = del_list.begin();
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i != del_list.end(); ++i)
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{
deleteSound(*i);
}
}
/* Interface */
bool loadSoundFile(const std::string &name,
const std::string &filepath)
{
SoundBuffer *buf = load_ogg_from_file(filepath);
if (buf)
addBuffer(name, buf);
return false;
}
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bool loadSoundData(const std::string &name,
const std::string &filedata)
{
SoundBuffer *buf = load_ogg_from_buffer(filedata, name);
if (buf)
addBuffer(name, buf);
return false;
}
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void updateListener(v3f pos, v3f vel, v3f at, v3f up)
{
m_listener_pos = pos;
alListener3f(AL_POSITION, pos.X, pos.Y, pos.Z);
alListener3f(AL_VELOCITY, vel.X, vel.Y, vel.Z);
ALfloat f[6];
f3_set(f, at);
f3_set(f+3, -up);
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alListenerfv(AL_ORIENTATION, f);
warn_if_error(alGetError(), "updateListener");
}
void setListenerGain(float gain)
{
alListenerf(AL_GAIN, gain);
}
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int playSound(const std::string &name, bool loop, float volume, float fade, float pitch)
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{
maintain();
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if(name == "")
return 0;
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SoundBuffer *buf = getFetchBuffer(name);
if(!buf){
infostream<<"OpenALSoundManager: \""<<name<<"\" not found."
<<std::endl;
return -1;
}
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int handle = -1;
if (fade > 0) {
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handle = playSoundRaw(buf, loop, 0.0f, pitch);
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fadeSound(handle, fade, volume);
} else {
handle = playSoundRaw(buf, loop, volume, pitch);
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}
return handle;
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}
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int playSoundAt(const std::string &name, bool loop, float volume, v3f pos, float pitch)
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{
maintain();
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if(name == "")
return 0;
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SoundBuffer *buf = getFetchBuffer(name);
if(!buf){
infostream<<"OpenALSoundManager: \""<<name<<"\" not found."
<<std::endl;
return -1;
}
return playSoundRawAt(buf, loop, volume, pos, pitch);
}
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void stopSound(int sound)
{
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maintain();
deleteSound(sound);
}
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void fadeSound(int soundid, float step, float gain)
{
m_sounds_fading[soundid] = FadeState(step, getSoundGain(soundid), gain);
}
void doFades(float dtime)
{
m_fade_delay += dtime;
if (m_fade_delay < 0.1f)
return;
float chkGain = 0;
for (std::unordered_map<int, FadeState>::iterator i = m_sounds_fading.begin();
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i != m_sounds_fading.end();) {
if (i->second.step < 0.f)
chkGain = -(i->second.current_gain);
else
chkGain = i->second.current_gain;
if (chkGain < i->second.target_gain) {
i->second.current_gain += (i->second.step * m_fade_delay);
i->second.current_gain = rangelim(i->second.current_gain, 0, 1);
updateSoundGain(i->first, i->second.current_gain);
++i;
} else {
if (i->second.target_gain <= 0.f)
stopSound(i->first);
m_sounds_fading.erase(i++);
}
}
m_fade_delay = 0;
}
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bool soundExists(int sound)
{
maintain();
return (m_sounds_playing.count(sound) != 0);
}
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void updateSoundPosition(int id, v3f pos)
{
std::unordered_map<int, PlayingSound*>::iterator i = m_sounds_playing.find(id);
if (i == m_sounds_playing.end())
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return;
PlayingSound *sound = i->second;
alSourcei(sound->source_id, AL_SOURCE_RELATIVE, false);
alSource3f(sound->source_id, AL_POSITION, pos.X, pos.Y, pos.Z);
alSource3f(sound->source_id, AL_VELOCITY, 0, 0, 0);
alSourcef(sound->source_id, AL_REFERENCE_DISTANCE, 30.0);
}
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bool updateSoundGain(int id, float gain)
{
std::unordered_map<int, PlayingSound*>::iterator i = m_sounds_playing.find(id);
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if (i == m_sounds_playing.end())
return false;
PlayingSound *sound = i->second;
alSourcef(sound->source_id, AL_GAIN, gain);
return true;
}
float getSoundGain(int id)
{
std::unordered_map<int, PlayingSound*>::iterator i = m_sounds_playing.find(id);
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if (i == m_sounds_playing.end())
return 0;
PlayingSound *sound = i->second;
ALfloat gain;
alGetSourcef(sound->source_id, AL_GAIN, &gain);
return gain;
}
};
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ISoundManager *createOpenALSoundManager(OnDemandSoundFetcher *fetcher)
{
OpenALSoundManager *m = new OpenALSoundManager(fetcher);
if(m->m_is_initialized)
return m;
delete m;
return NULL;
};