--- a/misc/libopenalbridge/openalbridge.c Fri Oct 11 11:55:31 2013 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,273 +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 (void) {
- ALCcontext *context;
- ALCdevice *device;
- int i;
-
- // reuse old context and resize the existing
- if (openal_ready() == AL_TRUE) {
- fprintf(stderr,"(Bridge Info) - already initialized\n");
- instances_number++;
- return AL_TRUE;
- }
-
- cache_pointer = 0;
- instances_number++;
-
- // initial memory size
- cache_size = 50;
-
- // 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] = new_sound_el();
-
- 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) {
- // release memory only when last session ends
- return;
- }
-
- for (i = 0; i < cache_size; i++) {
- openal_unloadfile(i);
- }
- 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 sound_data;
- int len, i, index = -1;
- 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 we don't have memory available search for a free element
- if (cache_pointer >= cache_size)
- if (the_sounds[i].is_used == AL_FALSE)
- index = i;
- }
-
- if (index == -1 && cache_pointer >= cache_size) {
- fprintf(stderr,"(Bridge Info) - No free spots found; doubling cache size\n", filename);
- cache_size *= 2;
- the_sounds = (al_sound_t *)Realloc (the_sounds, sizeof(al_sound_t) * cache_size);
- for (i = cache_size - 50; i < cache_size; i++)
- the_sounds[i] = new_sound_el();
- } else
- index = ++cache_pointer;
-
-
- // 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);
- if(data)
- free(data);
- return -6;
- }
-
- // alGenBuffers happens here
- sound_data = init_sound_el(filename);
-
- if (AL_NO_ERROR != alGetError()) {
- fprintf(stderr,"(Bridge ERROR) - Failed to allocate memory for buffer %d\n", index);
- free(data);
- return -5;
- }
-
- // copy pcm data in one buffer and free it
- alBufferData(sound_data.buffer, format, data, bitsize, freq);
- free(data);
-
- if (AL_NO_ERROR != alGetError()) {
- fprintf(stderr,"(Bridge ERROR) - Failed to write data to buffer %d\n", index);
- 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[index] = sound_data;
- return index;
-}
-
-
-void openal_unloadfile (uint32_t index) {
- ALint state;
-
- if (openal_ready() == AL_TRUE && index < cache_size && the_sounds[index].is_used == AL_TRUE) {
- alGetSourcei (Sources[the_sounds[index].source_index], AL_SOURCE_STATE, &state);
- if (state == AL_PLAYING || state == AL_PAUSED)
- openal_stopsound(index);
-
- // free memory and
- alDeleteBuffers (1, &the_sounds[index].buffer);
- the_sounds[index] = new_sound_el();
- }
-}