+/*
+Copyright (C) 2003, 2010 - Wolfire Games
+
+This file is part of Lugaru.
+
+Lugaru 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; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
#if USE_OPENAL
#include <stdlib.h>
#include <string.h>
-#include "MacCompatibility.h"
-#include "fmod.h"
-
-#include "AL/al.h"
-#include "AL/alc.h"
-
-#include "ogg/ogg.h"
-#include "vorbis/vorbisfile.h"
+#include "openal_wrapper.h"
// NOTE:
// FMOD uses a Left Handed Coordinate system, OpenAL uses a Right Handed
// one...so we just need to flip the sign on the Z axis when appropriate.
-
#define DYNAMIC_LOAD_OPENAL 0
#if DYNAMIC_LOAD_OPENAL
#define unload_alsyms()
#endif
-
typedef struct
{
ALuint sid;
- FSOUND_SAMPLE *sample;
+ OPENAL_SAMPLE *sample;
bool startpaused;
+ float position[3];
} OPENAL_Channels;
-typedef struct FSOUND_SAMPLE
+typedef struct OPENAL_SAMPLE
{
char *name;
ALuint bid; // buffer id.
int mode;
int is2d;
-} FSOUND_SAMPLE;
+ float min_distance;
+} OPENAL_SAMPLE;
-typedef struct FSOUND_STREAM
+typedef struct OPENAL_STREAM
{
char *name;
ALuint bid; // buffer id.
int mode;
int is2d;
-} FSOUND_STREAM;
+} OPENAL_STREAM;
static size_t num_channels = 0;
static OPENAL_Channels *channels = NULL;
static bool initialized = false;
+static float listener_position[3];
+
+static inline bool source_too_close(const int channel)
+{
+ const OPENAL_Channels *chan = &channels[channel];
+ const float *pos = chan->position;
+ const float distance = sqrtf(powf((pos[0] - listener_position[0]), 2.0f) +
+ powf((pos[1] - listener_position[1]), 2.0f) +
+ powf((pos[2] - listener_position[2]), 2.0f));
+ return (distance <= chan->sample->min_distance);
+}
+
+
+static void set_channel_position(const int channel, const float x,
+ const float y, const float z)
+{
+ OPENAL_Channels *chan = &channels[channel];
+
+ chan->position[0] = x;
+ chan->position[1] = y;
+ chan->position[2] = z;
+
+ OPENAL_SAMPLE *sptr = chan->sample;
+ if (sptr == NULL)
+ return;
+
+ const ALuint sid = chan->sid;
+ const bool no_attenuate = ((sptr->is2d) || (source_too_close(channel)));
+
+ if (no_attenuate)
+ {
+ alSourcei(sid, AL_SOURCE_RELATIVE, AL_TRUE);
+ alSource3f(sid, AL_POSITION, 0.0f, 0.0f, 0.0f);
+ }
+ else
+ {
+ alSourcei(sid, AL_SOURCE_RELATIVE, AL_FALSE);
+ alSource3f(sid, AL_POSITION, x, y, z);
+ }
+}
-void F_API OPENAL_3D_Listener_SetAttributes(const float *pos, const float *vel, float fx, float fy, float fz, float tx, float ty, float tz)
+AL_API void OPENAL_3D_Listener_SetAttributes(const float *pos, const float *vel, float fx, float fy, float fz, float tx, float ty, float tz)
{
if (!initialized) return;
if (pos != NULL)
+ {
alListener3f(AL_POSITION, pos[0], pos[1], -pos[2]);
+ listener_position[0] = pos[0];
+ listener_position[1] = pos[1];
+ listener_position[2] = -pos[2];
+ }
+
ALfloat vec[6] = { fx, fy, -fz, tz, ty, -tz };
alListenerfv(AL_ORIENTATION, vec);
// we ignore velocity, since doppler's broken in the Linux AL at the moment...
+
+ // adjust existing positions...
+ for (int i = 0; i < num_channels; i++)
+ {
+ const float *p = channels[i].position;
+ set_channel_position(i, p[0], p[1], p[2]);
+ }
}
-signed char F_API OPENAL_3D_SetAttributes(int channel, const float *pos, const float *vel)
+AL_API signed char OPENAL_3D_SetAttributes(int channel, const float *pos, const float *vel)
{
- if (!initialized) return FALSE;
- if ((channel < 0) || (channel >= num_channels)) return FALSE;
+ if (!initialized) return false;
+ if ((channel < 0) || (channel >= num_channels)) return false;
- if ((pos != NULL) && (!channels[channel].sample->is2d))
- alSource3f(channels[channel].sid, AL_POSITION, pos[0], pos[1], -pos[2]);
+ if (pos != NULL)
+ set_channel_position(channel, pos[0], pos[1], -pos[2]);
// we ignore velocity, since doppler's broken in the Linux AL at the moment...
- return TRUE;
+
+ return true;
}
-void F_API OPENAL_3D_SetDopplerFactor(float scale)
+AL_API void OPENAL_3D_SetDopplerFactor(float scale)
{
if (!initialized) return;
// unimplemented...looks like init routines just call this with scale == 0.0f anyhow.
}
-signed char F_API OPENAL_Init(int mixrate, int maxsoftwarechannels, unsigned int flags)
+AL_API signed char OPENAL_Init(int mixrate, int maxsoftwarechannels, unsigned int flags)
{
- if (initialized) return FALSE;
- if (maxsoftwarechannels == 0) return FALSE;
+ if (initialized) return false;
+ if (maxsoftwarechannels == 0) return false;
if (flags != 0) // unsupported.
- return FALSE;
+ return false;
if (!lookup_all_alsyms("./openal.so")) // !!! FIXME: linux specific lib name
{
if (!lookup_all_alsyms("openal.so.1")) // !!! FIXME: linux specific lib name
{
if (!lookup_all_alsyms("openal.so")) // !!! FIXME: linux specific lib name
- return FALSE;
+ return false;
}
}
ALCdevice *dev = alcOpenDevice(NULL);
if (!dev)
- return FALSE;
+ return false;
ALint caps[] = { ALC_FREQUENCY, mixrate, 0 };
ALCcontext *ctx = alcCreateContext(dev, caps);
if (!ctx)
{
alcCloseDevice(dev);
- return FALSE;
+ return false;
}
alcMakeContextCurrent(ctx);
alGenSources(1, &channels[i].sid); // !!! FIXME: verify this didn't fail!
initialized = true;
- return TRUE;
+ return true;
}
-void F_API OPENAL_Close()
+AL_API void OPENAL_Close()
{
if (!initialized) return;
initialized = false;
}
-FSOUND_SAMPLE *F_API OPENAL_GetCurrentSample(int channel)
+AL_API OPENAL_SAMPLE *OPENAL_GetCurrentSample(int channel)
{
if (!initialized) return NULL;
if ((channel < 0) || (channel >= num_channels)) return NULL;
return channels[channel].sample;
}
-signed char F_API OPENAL_GetPaused(int channel)
+AL_API signed char OPENAL_GetPaused(int channel)
{
- if (!initialized) return FALSE;
- if ((channel < 0) || (channel >= num_channels)) return FALSE;
+ if (!initialized) return false;
+ if ((channel < 0) || (channel >= num_channels)) return false;
if (channels[channel].startpaused)
- return(TRUE);
+ return(true);
ALint state = 0;
alGetSourceiv(channels[channel].sid, AL_SOURCE_STATE, &state);
- return((state == AL_PAUSED) ? TRUE : FALSE);
+ return((state == AL_PAUSED) ? true : false);
}
-unsigned int F_API OPENAL_GetLoopMode(int channel)
+AL_API unsigned int OPENAL_GetLoopMode(int channel)
{
if (!initialized) return 0;
if ((channel < 0) || (channel >= num_channels)) return 0;
ALint loop = 0;
alGetSourceiv(channels[channel].sid, AL_LOOPING, &loop);
if (loop)
- return(FSOUND_LOOP_NORMAL);
- return FSOUND_LOOP_OFF;
+ return(OPENAL_LOOP_NORMAL);
+ return OPENAL_LOOP_OFF;
}
-signed char F_API OPENAL_IsPlaying(int channel)
+AL_API signed char OPENAL_IsPlaying(int channel)
{
- if (!initialized) return FALSE;
- if ((channel < 0) || (channel >= num_channels)) return FALSE;
+ if (!initialized) return false;
+ if ((channel < 0) || (channel >= num_channels)) return false;
ALint state = 0;
alGetSourceiv(channels[channel].sid, AL_SOURCE_STATE, &state);
- return((state == AL_PLAYING) ? TRUE : FALSE);
+ return((state == AL_PLAYING) ? true : false);
}
-int F_API OPENAL_PlaySoundEx(int channel, FSOUND_SAMPLE *sptr, FSOUND_DSPUNIT *dsp, signed char startpaused)
+AL_API int OPENAL_PlaySoundEx(int channel, OPENAL_SAMPLE *sptr, OPENAL_DSPUNIT *dsp, signed char startpaused)
{
if (!initialized) return -1;
if (sptr == NULL) return -1;
if (dsp != NULL) return -1;
- if (channel == FSOUND_FREE)
+ if (channel == OPENAL_FREE)
{
for (int i = 0; i < num_channels; i++)
{
alSourceStop(channels[channel].sid);
channels[channel].sample = sptr;
alSourcei(channels[channel].sid, AL_BUFFER, sptr->bid);
- alSourcei(channels[channel].sid, AL_LOOPING, (sptr->mode == FSOUND_LOOP_OFF) ? AL_FALSE : AL_TRUE);
- alSourcei(channels[channel].sid, AL_SOURCE_RELATIVE, (sptr->is2d) ? AL_TRUE : AL_FALSE);
- alSource3f(channels[channel].sid, AL_POSITION, 0.0f, 0.0f, 0.0f);
+ alSourcei(channels[channel].sid, AL_LOOPING, (sptr->mode == OPENAL_LOOP_OFF) ? AL_FALSE : AL_TRUE);
+ set_channel_position(channel, 0.0f, 0.0f, 0.0f);
channels[channel].startpaused = ((startpaused) ? true : false);
if (!startpaused)
static void *decode_to_pcm(const char *_fname, ALenum &format, ALsizei &size, ALuint &freq)
{
+#ifdef __POWERPC__
+ const int bigendian = 1;
+#else
+ const int bigendian = 0;
+#endif
+
// !!! FIXME: if it's not Ogg, we don't have a decoder. I'm lazy. :/
char *fname = (char *) alloca(strlen(_fname) + 16);
strcpy(fname, _fname);
char *ptr = strchr(fname, '.');
- if (ptr) *ptr = NULL;
+ if (ptr) *ptr = '\0';
strcat(fname, ".ogg");
// just in case...
long rc = 0;
size_t allocated = 64 * 1024;
retval = (ALubyte *) malloc(allocated);
- while ( (rc = ov_read(&vf, buf, sizeof (buf), 0, 2, 1, &bitstream)) != 0 )
+ while ( (rc = ov_read(&vf, buf, sizeof (buf), bigendian, 2, 1, &bitstream)) != 0 )
{
if (rc > 0)
{
}
-FSOUND_SAMPLE * F_API OPENAL_Sample_Load(int index, const char *name_or_data, unsigned int mode, int offset, int length)
+AL_API OPENAL_SAMPLE *OPENAL_Sample_Load(int index, const char *name_or_data, unsigned int mode, int offset, int length)
{
if (!initialized) return NULL;
- if (index != FSOUND_FREE) return NULL; // this is all the game does...
+ if (index != OPENAL_FREE) return NULL; // this is all the game does...
if (offset != 0) return NULL; // this is all the game does...
if (length != 0) return NULL; // this is all the game does...
- if ((mode != FSOUND_HW3D) && (mode != FSOUND_2D)) return NULL; // this is all the game does...
+ if ((mode != OPENAL_HW3D) && (mode != OPENAL_2D)) return NULL; // this is all the game does...
- FSOUND_SAMPLE *retval = NULL;
+ OPENAL_SAMPLE *retval = NULL;
ALuint bufferName = 0;
ALenum format = AL_NONE;
ALsizei size = 0;
if (alGetError() == AL_NO_ERROR)
{
alBufferData(bid, format, data, size, frequency);
- retval = new FSOUND_SAMPLE;
+ retval = new OPENAL_SAMPLE;
retval->bid = bid;
- retval->mode = FSOUND_LOOP_OFF;
- retval->is2d = (mode == FSOUND_2D);
+ retval->mode = OPENAL_LOOP_OFF;
+ retval->is2d = (mode == OPENAL_2D);
retval->name = new char[strlen(name_or_data) + 1];
if (retval->name)
strcpy(retval->name, name_or_data);
return(retval);
}
-void F_API OPENAL_Sample_Free(FSOUND_SAMPLE *sptr)
+AL_API void OPENAL_Sample_Free(OPENAL_SAMPLE *sptr)
{
if (!initialized) return;
if (sptr)
}
}
-signed char F_API OPENAL_Sample_SetMode(FSOUND_SAMPLE *sptr, unsigned int mode)
+AL_API signed char OPENAL_Sample_SetMode(OPENAL_SAMPLE *sptr, unsigned int mode)
{
- if (!initialized) return FALSE;
- if ((mode != FSOUND_LOOP_NORMAL) && (mode != FSOUND_LOOP_OFF)) return FALSE;
- if (!sptr) return FALSE;
+ if (!initialized) return false;
+ if ((mode != OPENAL_LOOP_NORMAL) && (mode != OPENAL_LOOP_OFF)) return false;
+ if (!sptr) return false;
sptr->mode = mode;
- return TRUE;
+ return true;
}
-signed char F_API OPENAL_Sample_SetMinMaxDistance(FSOUND_SAMPLE *sptr, float min, float max)
+AL_API signed char OPENAL_Sample_SetMinMaxDistance(OPENAL_SAMPLE *sptr, float mindist, float maxdist)
{
- if (!initialized) return FALSE;
- if (sptr == NULL) return FALSE;
- // !!! FIXME: write me
+ if (!initialized) return false;
+ if (sptr == NULL) return false;
+ sptr->min_distance = mindist;
+ // we ignore maxdist. It's not really important to this game, and the
+ // FMOD docs suggest that it's worthless anyhow.
+
+ // recalc sources to see if we need to adjust attenuation.
+ for (int i = 0; i < num_channels; i++)
+ {
+ if (channels[i].sample == sptr)
+ {
+ const float *p = channels[i].position;
+ set_channel_position(i, p[0], p[1], p[2]);
+ }
+ }
+
return 0;
}
-signed char F_API OPENAL_SetFrequency(int channel, int freq)
+AL_API signed char OPENAL_SetFrequency(int channel, int freq)
{
- if (!initialized) return FALSE;
- if (channel == FSOUND_ALL)
+ if (!initialized) return false;
+ if (channel == OPENAL_ALL)
{
for (int i = 0; i < num_channels; i++)
OPENAL_SetFrequency(i, freq);
- return TRUE;
+ return true;
}
- if ((channel < 0) || (channel >= num_channels)) return FALSE;
+ if ((channel < 0) || (channel >= num_channels)) return false;
if (freq == 8012) // hack
alSourcef(channels[channel].sid, AL_PITCH, 8012.0f / 44100.0f);
else
alSourcef(channels[channel].sid, AL_PITCH, 1.0f);
- return TRUE;
+ return true;
}
-signed char F_API OPENAL_SetVolume(int channel, int vol)
+AL_API signed char OPENAL_SetVolume(int channel, int vol)
{
- if (!initialized) return FALSE;
+ if (!initialized) return false;
- if (channel == FSOUND_ALL)
+ if (channel == OPENAL_ALL)
{
for (int i = 0; i < num_channels; i++)
OPENAL_SetVolume(i, vol);
- return TRUE;
+ return true;
}
- if ((channel < 0) || (channel >= num_channels)) return FALSE;
+ if ((channel < 0) || (channel >= num_channels)) return false;
if (vol < 0) vol = 0;
else if (vol > 255) vol = 255;
ALfloat gain = ((ALfloat) vol) / 255.0f;
alSourcef(channels[channel].sid, AL_GAIN, gain);
- return TRUE;
+ return true;
}
-signed char F_API OPENAL_SetPaused(int channel, signed char paused)
+AL_API signed char OPENAL_SetPaused(int channel, signed char paused)
{
- if (!initialized) return FALSE;
+ if (!initialized) return false;
- if (channel == FSOUND_ALL)
+ if (channel == OPENAL_ALL)
{
for (int i = 0; i < num_channels; i++)
OPENAL_SetPaused(i, paused);
- return TRUE;
+ return true;
}
- if ((channel < 0) || (channel >= num_channels)) return FALSE;
+ if ((channel < 0) || (channel >= num_channels)) return false;
ALint state = 0;
if (channels[channel].startpaused)
alSourcePlay(channels[channel].sid);
channels[channel].startpaused = false;
}
- return TRUE;
+ return true;
}
-void F_API OPENAL_SetSFXMasterVolume(int volume)
+AL_API void OPENAL_SetSFXMasterVolume(int volume)
{
if (!initialized) return;
ALfloat gain = ((ALfloat) volume) / 255.0f;
alListenerf(AL_GAIN, gain);
}
-signed char F_API OPENAL_StopSound(int channel)
+AL_API signed char OPENAL_StopSound(int channel)
{
- if (!initialized) return FALSE;
+ if (!initialized) return false;
- if (channel == FSOUND_ALL)
+ if (channel == OPENAL_ALL)
{
for (int i = 0; i < num_channels; i++)
OPENAL_StopSound(i);
- return TRUE;
+ return true;
}
- if ((channel < 0) || (channel >= num_channels)) return FALSE;
+ if ((channel < 0) || (channel >= num_channels)) return false;
alSourceStop(channels[channel].sid);
channels[channel].startpaused = false;
- return TRUE;
+ return true;
}
-FSOUND_STREAM * F_API OPENAL_Stream_Open(const char *name_or_data, unsigned int mode, int offset, int length)
+AL_API OPENAL_STREAM *OPENAL_Stream_Open(const char *name_or_data, unsigned int mode, int offset, int length)
{
- return (FSOUND_STREAM *) OPENAL_Sample_Load(FSOUND_FREE, name_or_data, mode, offset, length);
+ return (OPENAL_STREAM *) OPENAL_Sample_Load(OPENAL_FREE, name_or_data, mode, offset, length);
}
-signed char F_API OPENAL_Stream_Close(FSOUND_STREAM *stream)
+AL_API void OPENAL_Stream_Close(OPENAL_STREAM *stream)
{
- OPENAL_Sample_Free((FSOUND_SAMPLE *) stream);
+ OPENAL_Sample_Free((OPENAL_SAMPLE *) stream);
}
-FSOUND_SAMPLE * F_API OPENAL_Stream_GetSample(FSOUND_STREAM *stream)
+AL_API OPENAL_SAMPLE *OPENAL_Stream_GetSample(OPENAL_STREAM *stream)
{
if (!initialized) return NULL;
- return (FSOUND_SAMPLE *) stream;
+ return (OPENAL_SAMPLE *) stream;
}
-int F_API OPENAL_Stream_PlayEx(int channel, FSOUND_STREAM *stream, FSOUND_DSPUNIT *dsp, signed char startpaused)
+AL_API int OPENAL_Stream_PlayEx(int channel, OPENAL_STREAM *stream, OPENAL_DSPUNIT *dsp, signed char startpaused)
{
- return OPENAL_PlaySoundEx(channel, (FSOUND_SAMPLE *) stream, dsp, startpaused);
+ return OPENAL_PlaySoundEx(channel, (OPENAL_SAMPLE *) stream, dsp, startpaused);
}
-signed char F_API OPENAL_Stream_Stop(FSOUND_STREAM *stream)
+AL_API signed char OPENAL_Stream_Stop(OPENAL_STREAM *stream)
{
- if (!initialized) return FALSE;
+ if (!initialized) return false;
for (int i = 0; i < num_channels; i++)
{
- if (channels[i].sample == (FSOUND_SAMPLE *) stream)
+ if (channels[i].sample == (OPENAL_SAMPLE *) stream)
{
alSourceStop(channels[i].sid);
channels[i].startpaused = false;
}
}
- return TRUE;
+ return true;
}
-signed char F_API OPENAL_Stream_SetMode(FSOUND_STREAM *stream, unsigned int mode)
+AL_API signed char OPENAL_Stream_SetMode(OPENAL_STREAM *stream, unsigned int mode)
{
- return OPENAL_Sample_SetMode((FSOUND_SAMPLE *) stream, mode);
+ return OPENAL_Sample_SetMode((OPENAL_SAMPLE *) stream, mode);
}
-void F_API OPENAL_Update()
+AL_API void OPENAL_Update()
{
if (!initialized) return;
alcProcessContext(alcGetCurrentContext());
}
-signed char F_API OPENAL_SetOutput(int outputtype)
+AL_API signed char OPENAL_SetOutput(int outputtype)
{
- return TRUE;
+ return true;
}
#endif
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