--- a/misc/openalbridge/openalbridge.c Thu Jun 17 16:28:42 2010 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,366 +0,0 @@
-/*
-* OpenAL Bridge - a simple portable library for OpenAL interface
-* Copyright (c) 2009 Vittorio Giovara <vittorio.giovara@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; version 2 of the License
-*
-* 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; if not, write to the Free Software
-* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
-*/
-
-#include "openalbridge.h"
-#include "globals.h"
-#include "al.h"
-#include "alc.h"
-#include "wrappers.h"
-#include "loaders.h"
-
-
-/*Sources are points emitting sound*/
-ALuint *Sources;
-/*Buffers hold sound data*/
-ALuint *Buffers;
-/*index for Sources and Buffers*/
-ALuint globalindex, globalsize, increment;
-
-ALboolean isBridgeReady = AL_FALSE;
-ALfloat old_gain;
-
-int openal_init (int memorysize) {
- /*Initialize an OpenAL contex and allocate memory space for data and buffers*/
- ALCcontext *context;
- ALCdevice *device;
-
- // set the memory dimentsion and the increment width when reallocating
- if (memorysize <= 0)
- globalsize = 50;
- else
- globalsize = memorysize;
- increment = globalsize;
-
- // reuse old context but keep the new value for increment
- if (isBridgeReady == AL_TRUE) {
- fprintf(stderr,"(Bridge Warning) - already initialized");
- return 0;
- }
-
- // open hardware device if present
- device = alcOpenDevice(NULL);
-
- if (device == NULL) {
- fprintf(stderr,"(Bridge Warning) - failed to open sound device, using software renderer");
- device = alcOpenDevice("Generic Software");
- if (device == NULL) {
- fprintf(stderr,"(Bridge Error) - failed to open sound software device, sound will be disabled");
- return -1;
- }
- }
-
- fprintf(stderr,"(Bridge Info) - Output device: %s", alcGetString(device, ALC_DEVICE_SPECIFIER));
-
- context = alcCreateContext(device, NULL);
- alcMakeContextCurrent(context);
- alcProcessContext(context);
-
- if (AL_NO_ERROR != alGetError()) {
- fprintf(stderr,"(Bridge Error) - Failed to create a new contex");
- alcMakeContextCurrent(NULL);
- alcDestroyContext(context);
- alcCloseDevice(device);
- return -2;
- }
-
- // allocate memory space for buffers and sources
- Buffers = (ALuint*) Malloc(sizeof(ALuint)*globalsize);
- Sources = (ALuint*) Malloc(sizeof(ALuint)*globalsize);
-
- // set the listener gain, position (on xyz axes), velocity (one value for each axe) and orientation
- // Position, Velocity and Orientation of the listener
- ALfloat ListenerPos[] = {0.0, 0.0, 0.0};
- ALfloat ListenerVel[] = {0.0, 0.0, 0.0};
- ALfloat ListenerOri[] = {0.0, 0.0, -1.0, 0.0, 1.0, 0.0};
-
- alListenerf (AL_GAIN, 1.0f );
- alListenerfv(AL_POSITION, ListenerPos);
- alListenerfv(AL_VELOCITY, ListenerVel);
- alListenerfv(AL_ORIENTATION, ListenerOri);
-
- if (AL_NO_ERROR != alGetError()) {
- fprintf(stderr,"(Bridge Error) - Failed to set Listener properties");
- return -3;
- }
- isBridgeReady = AL_TRUE;
-
- alGetError(); // clear any AL errors beforehand
- return AL_TRUE;
-}
-
-void openal_close (void) {
- /*Stop all sounds, deallocate all memory and close OpenAL */
- ALCcontext *context;
- ALCdevice *device;
-
- if (isBridgeReady == AL_FALSE) {
- fprintf(stderr,"(Bridge Warning) - OpenAL not initialized");
- return;
- }
-
- alSourceStopv (globalsize, Sources);
- alDeleteSources (globalsize, Sources);
- alDeleteBuffers (globalsize, Buffers);
-
- free(Sources);
- free(Buffers);
-
- context = alcGetCurrentContext();
- device = alcGetContextsDevice(context);
-
- alcMakeContextCurrent(NULL);
- alcDestroyContext(context);
- alcCloseDevice(device);
-
- isBridgeReady = AL_FALSE;
-
- fprintf(stderr,"(Bridge Info) - closed");
-
- return;
-}
-
-ALboolean openal_ready (void) {
- return isBridgeReady;
-}
-
-
-void helper_realloc (void) {
- /*expands allocated memory when loading more sound files than expected*/
- int oldsize = globalsize;
- globalsize += increment;
-
- fprintf(stderr,"(Bridge Info) - Realloc in process from %d to %d\n", oldsize, globalsize);
-
- Buffers = (ALuint*) Realloc(Buffers, sizeof(ALuint)*globalsize);
- Sources = (ALuint*) Realloc(Sources, sizeof(ALuint)*globalsize);
-
- return;
-}
-
-
-int openal_loadfile (const char *filename){
- /*Open a file, load into memory and allocate the Source buffer for playing*/
- ALfloat SourcePos[] = { 0.0, 0.0, 0.0 }; /*Position of the source sound*/
- ALfloat SourceVel[] = { 0.0, 0.0, 0.0 }; /*Velocity of the source sound*/
- ALenum format;
- ALsizei bitsize, freq;
- char *data;
- uint32_t fileformat;
- ALenum error;
- FILE *fp;
-
- if (isBridgeReady == AL_FALSE) {
- fprintf(stderr,"(Bridge Warning) - not initialized");
- return -1;
- }
-
- /*when the buffers are all used, we can expand memory to accept new files*/
- if (globalindex == globalsize)
- helper_realloc();
-
- /*detect the file format, as written in the first 4 bytes of the header*/
- fp = Fopen (filename, "rb");
-
- if (fp == NULL)
- return -2;
-
- error = fread (&fileformat, sizeof(uint32_t), 1, fp);
- fclose (fp);
-
- if (error < 0) {
- fprintf(stderr,"(Bridge Error) - File %s is too short", filename);
- return -3;
- }
-
- /*prepare the buffer to receive data*/
- alGenBuffers(1, &Buffers[globalindex]);
-
- if (AL_NO_ERROR != alGetError()) {
- fprintf(stderr,"(Bridge Error) - Failed to allocate memory for buffers");
- return -4;
- }
-
- /*prepare the source to emit sound*/
- alGenSources(1, &Sources[globalindex]);
-
- if (AL_NO_ERROR != alGetError()) {
- fprintf(stderr,"(Bridge Error) - Failed to allocate memory for sources");
- return -5;
- }
-
- switch (ENDIAN_BIG_32(fileformat)) {
- case OGG_FILE_FORMAT:
- error = load_oggvorbis (filename, &format, &data, &bitsize, &freq);
- break;
- case WAV_FILE_FORMAT:
- error = load_wavpcm (filename, &format, &data, &bitsize, &freq);
- break;
- default:
- fprintf(stderr,"(Bridge Error) - File format (%08X) not supported", ENDIAN_BIG_32(fileformat));
- return -6;
- break;
- }
-
- if (error != 0) {
- fprintf(stderr,"(Bridge Error) - error loading file %s", filename);
- free(data);
- return -7;
- }
-
- //copy pcm data in one buffer and free it
- alBufferData(Buffers[globalindex], format, data, bitsize, freq);
- free(data);
-
- if (AL_NO_ERROR != alGetError()) {
- fprintf(stderr,"(Bridge Error) - Failed to write data to buffers");
- return -8;
- }
-
- /*set source properties that it will use when it's in playback*/
- alSourcei (Sources[globalindex], AL_BUFFER, Buffers[globalindex] );
- alSourcef (Sources[globalindex], AL_PITCH, 1.0f );
- alSourcef (Sources[globalindex], AL_GAIN, 1.0f );
- alSourcefv(Sources[globalindex], AL_POSITION, SourcePos );
- alSourcefv(Sources[globalindex], AL_VELOCITY, SourceVel );
- alSourcei (Sources[globalindex], AL_LOOPING, 0 );
-
- if (AL_NO_ERROR != alGetError()) {
- fprintf(stderr,"(Bridge Error) - Failed to set Source properties");
- return -9;
- }
-
- alGetError(); /* clear any AL errors beforehand */
-
- /*returns the index of the source you just loaded, increments it and exits*/
- return globalindex++;
-}
-
-
-void openal_playsound (uint32_t index) {
- openal_playsound_loop (index, 0);
-}
-
-
-void openal_pausesound (uint32_t index) {
- if (isBridgeReady == AL_TRUE && index < globalsize)
- alSourcePause(Sources[index]);
-}
-
-
-void openal_stopsound (uint32_t index) {
- openal_stopsound_free(index, 0);
-}
-
-
-void openal_freesound (uint32_t index){
- if (isBridgeReady == AL_TRUE && index < globalsize)
- alSourceStop(Sources[index]);
- // STUB
-}
-
-
-void openal_playsound_loop (unsigned int index, char loops) {
- if (isBridgeReady == AL_TRUE && index < globalsize) {
- alSourcePlay(Sources[index]);
- if (loops != 0)
- openal_toggleloop(index);
- }
-}
-
-void openal_stopsound_free (unsigned int index, char freesource) {
- if (isBridgeReady == AL_TRUE && index < globalsize) {
- alSourceStop(Sources[index]);
- if (freesource != 0)
- openal_freesound(index);
- }
-}
-
-void openal_toggleloop (uint32_t index) {
- ALint loop;
-
- if (isBridgeReady == AL_TRUE && index < globalsize) {
- alGetSourcei (Sources[index], AL_LOOPING, &loop);
- alSourcei (Sources[index], AL_LOOPING, !((uint8_t) loop) & 0x00000001);
- }
-
-}
-
-
-void openal_setvolume (uint32_t index, float gain) {
- if (isBridgeReady == AL_TRUE && index < globalsize)
- alSourcef (Sources[index], AL_GAIN, gain);
-}
-
-
-void openal_setglobalvolume (float gain) {
- if (isBridgeReady == AL_TRUE)
- alListenerf (AL_GAIN, gain);
-}
-
-void openal_togglemute () {
- ALfloat gain;
-
- if (isBridgeReady == AL_TRUE) {
- alGetListenerf (AL_GAIN, &gain);
- if (gain > 0) {
- old_gain = gain;
- gain = 0;
- } else
- gain = old_gain;
-
- alListenerf (AL_GAIN, gain);
- }
-}
-
-// Fade in or out by calling a helper thread
-void openal_fade (uint32_t index, uint16_t quantity, al_fade_t direction) {
-#ifndef _WIN32
- pthread_t thread;
-#else
- HANDLE Thread;
-#endif
- fade_t *fade;
-
- if (isBridgeReady == AL_TRUE && index < globalsize) {
- fade = (fade_t*) Malloc(sizeof(fade_t));
- fade->index = index;
- fade->quantity = quantity;
- fade->type = direction;
-
-#ifndef _WIN32
- pthread_create(&thread, NULL, (void *)helper_fade, (void *)fade);
- pthread_detach(thread);
-#else
- Thread = (HANDLE) _beginthread((void *)helper_fade, 0, (void *)fade);
-#endif
- }
-}
-
-void openal_fadein (uint32_t index, uint16_t quantity) {
- openal_fade(index, quantity, AL_FADE_IN);
-}
-
-void openal_fadeout (uint32_t index, uint16_t quantity) {
- openal_fade(index, quantity, AL_FADE_OUT);
-}
-
-
-void openal_setposition (uint32_t index, float x, float y, float z) {
- if (isBridgeReady == AL_TRUE && index < globalsize)
- alSource3f(Sources[index], AL_POSITION, x, y, z);;
-}