--- a/misc/openalbridge/openalbridge.c Thu Jun 17 19:57:51 2010 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,265 +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"
-#include "string.h"
-
-// Sources are points emitting sound, their number is limited, but a single source can play many buffers
-// Buffers hold sound data and are unlimited
-ALuint *Sources;
-ALuint cache_size, cache_index, sources_number;
-ALboolean instances_number;
-al_sound_t *the_sounds;
-ALint cache_pointer;
-
-// Initialize an OpenAL contex and allocate memory space for data and buffers
-// It can be called twice to increase the cache size
-int openal_init (int memorysize) {
- ALCcontext *context;
- ALCdevice *device;
- int i;
-
- // reuse old context and resize the existing
- if (openal_ready() == AL_TRUE) {
- cache_size += memorysize;
- fprintf(stderr,"(Bridge Info) - already initialized, resizing cache to %d\n", cache_size);
- the_sounds = (al_sound_t *)Realloc (the_sounds, sizeof(al_sound_t) * cache_size);
- for (i = cache_size - memorysize; i < cache_size; i++) {
- the_sounds[i].filename = NULL;
- the_sounds[i].buffer = -1;
- the_sounds[i].source_index = -1;
- the_sounds[i].stats = 0;
- }
- instances_number++;
- return AL_TRUE;
- }
-
- cache_pointer = 0;
- instances_number++;
-
- // set the memory dimentsion and the increment width when reallocating
- if (memorysize <= 0)
- cache_size = 50;
- else
- cache_size = memorysize;
-
- // open hardware device if present
- device = alcOpenDevice(NULL);
- sources_number = 16;
- if (device == NULL) {
- fprintf(stderr,"(Bridge Warning) - failed to open sound device, using software renderer\n");
- device = alcOpenDevice("Generic Software");
- sources_number = 32;
- if (device == NULL) {
- fprintf(stderr,"(Bridge ERROR) - failed to start software renderer, sound will be disabled\n");
- return -1;
- }
- }
-
- fprintf(stderr,"(Bridge Info) - output device: %s\n", 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\n");
- alcMakeContextCurrent(NULL);
- alcDestroyContext(context);
- alcCloseDevice(device);
- return -2;
- }
-
- Sources = (ALuint *)Malloc (sizeof(ALuint) * sources_number);
- alGenSources(sources_number, Sources);
-
- // 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\n");
- return -3;
- }
-
- the_sounds = (al_sound_t *)Malloc (sizeof(al_sound_t) * cache_size);
- for (i = 0; i < cache_size; i++) {
- the_sounds[i].filename = NULL;
- the_sounds[i].buffer = -1;
- the_sounds[i].source_index = -1;
- the_sounds[i].stats = 0;
- }
-
- alGetError();
- return AL_TRUE;
-}
-
-
-// Stop all sounds, deallocate all memory and close OpenAL context
-void openal_close (void) {
- ALCcontext *context;
- ALCdevice *device;
- int i;
-
- if (instances_number == 0) {
- fprintf(stderr,"(Bridge Warning) - OpenAL not initialized\n");
- return;
- }
-
- instances_number--;
- if (instances_number > 0) {
- return;
- }
-
- //TODO: free other stuff also
- for (i = 0; i < cache_size; i++)
- alDeleteBuffers (1, &the_sounds[i].buffer);
- free(the_sounds);
-
- alSourceStopv (sources_number, Sources);
- alDeleteSources (sources_number, Sources);
-
- free(Sources);
-
- context = alcGetCurrentContext();
- device = alcGetContextsDevice(context);
-
- alcMakeContextCurrent(NULL);
- alcDestroyContext(context);
- alcCloseDevice(device);
-
- fprintf(stderr,"(Bridge Info) - closed\n");
-
- return;
-}
-
-
-ALboolean openal_ready (void) {
- if (instances_number >= 1)
- return AL_TRUE;
- else
- return AL_FALSE;
-}
-
-
-// Open a file, load into memory and allocate the Source buffer for playing
-int openal_loadfile (const char *filename){
- ALenum format, error;
- ALsizei bitsize, freq;
- uint32_t fileformat;
- al_sound_t soundData;
- int len, i;
- char *data;
- FILE *fp;
-
- if (openal_ready() == AL_FALSE) {
- fprintf(stderr,"(Bridge Warning) - not initialized\n");
- return -1;
- }
-
- // if this sound is already loaded return the index from the_sounds
- len = strlen(filename);
- for (i = 0; i < cache_size; i++) {
- if (the_sounds[i].filename != NULL && strncmp(the_sounds[i].filename, filename, len) == 0) {
-#ifdef DEBUG
- fprintf(stderr,"(Bridge Debug) - sound %d is already loaded\n", i);
-#endif
- return i;
- }
- }
-
- if (cache_pointer >= cache_size) {
- fprintf(stderr,"(Bridge ERROR) - Cache size limit reached; consider allocating more space\n", filename);
- return -2;
- }
-
- // detect the file format, as written in the first 4 bytes of the header
- fp = Fopen (filename, "rb");
-
- if (fp == NULL) {
- fprintf(stderr,"(Bridge ERROR) - File %s not loaded\n", filename);
- return -3;
- }
-
- error = fread (&fileformat, sizeof(uint32_t), 1, fp);
- fclose (fp);
-
- if (error < 0) {
- fprintf(stderr,"(Bridge ERROR) - File %s is too short\n", filename);
- return -4;
- }
-
- 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\n", ENDIAN_BIG_32(fileformat));
- return -5;
- break;
- }
-
- if (error != 0) {
- fprintf(stderr,"(Bridge ERROR) - error loading file %s\n", filename);
- free(data);
- return -6;
- }
-
- alGenBuffers(1, &soundData.buffer);
- soundData.filename = filename;
- soundData.source_index = -1;
- soundData.stats = 0;
-
- if (AL_NO_ERROR != alGetError()) {
- fprintf(stderr,"(Bridge ERROR) - Failed to allocate memory for buffers\n");
- return -5;
- }
-
- // copy pcm data in one buffer and free it
- alBufferData(soundData.buffer, format, data, bitsize, freq);
- free(data);
-
- if (AL_NO_ERROR != alGetError()) {
- fprintf(stderr,"(Bridge ERROR) - Failed to write data to buffers\n");
- return -8;
- }
-
- // clear any AL errors beforehand
- alGetError();
-
- fprintf(stderr,"(Bridge Info) - successfully loaded %s\n", filename);
-
- // returns the index of the source you just loaded, increments it and exits
- the_sounds[cache_pointer] = soundData;
- return cache_pointer++;
-}