diff -r b07e87f6430f -r 0ddf641fddee openalbridge/openalbridge.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/openalbridge/openalbridge.c Wed Aug 19 13:49:47 2009 +0000 @@ -0,0 +1,464 @@ +/* + * OpenAL Bridge - a simple portable library for OpenAL interface + * Copyright (c) 2009 Vittorio Giovara + * + * 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 "wrappers.h" +#include "alc.h" +#include "loaders.h" +#include "endianness.h" + +#ifdef __CPLUSPLUS +extern "C" { +#endif + + /*Sources are points emitting sound*/ + ALuint *Sources; + /*Buffers hold sound data*/ + ALuint *Buffers; + /*index for Sources and Buffers*/ + ALuint globalindex, globalsize, increment; + + ALboolean openalReady = AL_FALSE; + + ALboolean openal_close (void) { + /*Stop all sounds, deallocate all memory and close OpenAL */ + ALCcontext *context; + ALCdevice *device; + + if(openalReady == AL_FALSE) { + fprintf(stderr, "ERROR: OpenAL not initialized\n"); + return AL_FALSE; + } + + alSourceStopv (globalsize, Sources); + alDeleteSources (globalsize, Sources); + alDeleteBuffers (globalsize, Buffers); + + free(Sources); + free(Buffers); + + context = alcGetCurrentContext(); + device = alcGetContextsDevice(context); + + alcMakeContextCurrent(NULL); + alcDestroyContext(context); + alcCloseDevice(device); + + openalReady = AL_FALSE; + + return AL_TRUE; + } + + ALboolean openal_ready(void) { + return openalReady; + } + + ALboolean openal_init(uint32_t memorysize) { + /*Initialize an OpenAL contex and allocate memory space for data and buffers*/ + ALCcontext *context; + ALCdevice *device; + const ALCchar *default_device; + + /*Position of the listener*/ + ALfloat ListenerPos[] = { 0.0, 0.0, 0.0 }; + /*Velocity of the listener*/ + ALfloat ListenerVel[] = { 0.0, 0.0, 0.0 }; + /*Orientation of the listener. (first 3 elements are "at", second 3 are "up")*/ + ALfloat ListenerOri[] = { 0.0, 0.0, -1.0, 0.0, 1.0, 0.0 }; + + if(openalReady == AL_TRUE) { + fprintf(stderr, "ERROR: OpenAL already initialized\n"); + return AL_FALSE; + } + + default_device = alcGetString(NULL, ALC_DEFAULT_DEVICE_SPECIFIER); + fprintf(stderr, "Using default device: %s\n", default_device); + + if ((device = alcOpenDevice(default_device)) == NULL) { + fprintf(stderr, "ERROR: Failed to open sound device\n"); + return AL_FALSE; + } + + context = alcCreateContext(device, NULL); + alcMakeContextCurrent(context); + alcProcessContext(context); + + if (AlGetError("ERROR %d: Creating a new contex\n") != AL_TRUE) + return AL_FALSE; + + /*allocate memory space for buffers and sources*/ + if (memorysize == 0) + globalsize = 50; + else + globalsize = memorysize; + increment = globalsize; + 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*/ + alListenerf (AL_GAIN, 1.0f ); + alListenerfv(AL_POSITION, ListenerPos); + alListenerfv(AL_VELOCITY, ListenerVel); + alListenerfv(AL_ORIENTATION, ListenerOri); + + if (AlGetError("ERROR %d: Setting Listener properties\n") != AL_TRUE) + return AL_FALSE; + + openalReady = AL_TRUE; + + alGetError(); /* clear any AL errors beforehand */ + return AL_TRUE; + } + + + ALboolean helper_realloc (void) { + /*expands allocated memory when loading more sound files than expected*/ + int oldsize = globalsize; + globalsize += increment; + +#ifdef DEBUG + fprintf(stderr, "OpenAL: Realloc in process from %d to %d\n", oldsize, globalsize); +#endif + + Buffers = (ALuint*) Realloc(Buffers, sizeof(ALuint)*globalsize); + Sources = (ALuint*) Realloc(Sources, sizeof(ALuint)*globalsize); + + return AL_TRUE; + } + + + ALint 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(openalReady == AL_FALSE) { + fprintf(stderr, "ERROR: OpenAL not initialized\n"); + return AL_FALSE; + } + + /*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 -1; + error = fread (&fileformat, sizeof(uint32_t), 1, fp); + fclose (fp); + + if (error < 0) { + fprintf(stderr, "ERROR: file %s is too short \n", filename); + return -2; + } + + /*prepare the buffer to receive data*/ + alGenBuffers(1, &Buffers[globalindex]); + + if (AlGetError("ERROR %d: Allocating memory for buffers\n") != AL_TRUE) + return -3; + + /*prepare the source to emit sound*/ + alGenSources(1, &Sources[globalindex]); + + if (AlGetError("ERROR %d: Allocating memory for sources\n") != AL_TRUE) + return -4; + + + if (fileformat == 0x5367674F) /*check if ogg*/ + error = load_oggvorbis (filename, &format, &data, &bitsize, &freq); + else { + if (fileformat == 0x46464952) /*check if wav*/ + error = load_wavpcm (filename, &format, &data, &bitsize, &freq); + else { + fprintf(stderr, "ERROR: File format (%08X) not supported!\n", invert_endianness(fileformat)); + return -5; + } + } + + /*copy pcm data in one buffer*/ + alBufferData(Buffers[globalindex], format, data, bitsize, freq); + free(data); /*deallocate data to save memory*/ + + if (AlGetError("ERROR %d: Writing data to buffer\n") != AL_TRUE) + return -6; + + /*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 (AlGetError("ERROR %d: Setting source properties\n") != AL_TRUE) + return -7; + + alGetError(); /* clear any AL errors beforehand */ + + /*returns the index of the source you just loaded, increments it and exits*/ + return globalindex++; + } + + + ALboolean openal_toggleloop (uint32_t index){ + /*Set or unset looping mode*/ + ALint loop; + + if(openalReady == AL_FALSE) { + fprintf(stderr, "ERROR: OpenAL not initialized\n"); + return AL_FALSE; + } + + if (index >= globalsize) { + fprintf(stderr, "ERROR: index out of bounds (got %d, max %d)\n", index, globalindex); + return AL_FALSE; + } + + alGetSourcei (Sources[index], AL_LOOPING, &loop); + alSourcei (Sources[index], AL_LOOPING, !((uint8_t) loop) & 0x00000001); + if (AlGetError("ERROR %d: Getting or setting loop property\n") != AL_TRUE) + return AL_FALSE; + + alGetError(); /* clear any AL errors beforehand */ + + return AL_TRUE; + } + + + ALboolean openal_setvolume (uint32_t index, uint8_t percentage) { + if(openalReady == AL_FALSE) { + fprintf(stderr, "ERROR: OpenAL not initialized\n"); + return AL_FALSE; + } + + /*Set volume for sound number index*/ + if (index >= globalindex) { + fprintf(stderr, "ERROR: index out of bounds (got %d, max %d)\n", index, globalindex); + return AL_FALSE; + } + + if (percentage > 100) + percentage = 100; + alSourcef (Sources[index], AL_GAIN, (float) percentage/100.0f); + if (AlGetError2("ERROR %d: setting volume for sound %d\n", index) != AL_TRUE) + return AL_FALSE; + + alGetError(); /* clear any AL errors beforehand */ + + return AL_TRUE; + } + + + ALboolean openal_setglobalvolume (uint8_t percentage) { + if(openalReady == AL_FALSE) { + fprintf(stderr, "ERROR: OpenAL not initialized\n"); + return AL_FALSE; + } + + /*Set volume for all sounds*/ + if (percentage > 100) + percentage = 100; + alListenerf (AL_GAIN, (float) percentage/100.0f); + if (AlGetError("ERROR %d: Setting global volume\n") != AL_TRUE) + return AL_FALSE; + + alGetError(); /* clear any AL errors beforehand */ + + return AL_TRUE; + } + + + ALboolean openal_togglemute () { + /*Mute or unmute sound*/ + ALfloat mute; + + if(openalReady == AL_FALSE) { + fprintf(stderr, "ERROR: OpenAL not initialized\n"); + return AL_FALSE; + } + + alGetListenerf (AL_GAIN, &mute); + if (mute > 0) + mute = 0; + else + mute = 1.0; + alListenerf (AL_GAIN, mute); + if (AlGetError("ERROR %d: Setting mute property\n") != AL_TRUE) + return AL_FALSE; + + alGetError(); /* clear any AL errors beforehand */ + + return AL_TRUE; + } + + + ALboolean openal_fade (uint32_t index, uint16_t quantity, ALboolean direction) { + /*Fade in or out by calling a helper thread*/ +#ifndef _WIN32 + pthread_t thread; +#else + HANDLE Thread; + DWORD threadID; +#endif + fade_t *fade; + + if(openalReady == AL_FALSE) { + fprintf(stderr, "ERROR: OpenAL not initialized\n"); + return AL_FALSE; + } + + fade = (fade_t*) Malloc(sizeof(fade_t)); + fade->index = index; + fade->quantity = quantity; + + if (index >= globalindex) { + fprintf(stderr, "ERROR: index out of bounds (got %d, max %d)\n", index, globalindex); + return AL_FALSE; + } + + if (direction == FADE_IN) +#ifndef _WIN32 + pthread_create(&thread, NULL, helper_fadein, (void*) fade); +#else + Thread = _beginthread(&helper_fadein, 0, (void*) fade); +#endif + else { + if (direction == FADE_OUT) +#ifndef _WIN32 + pthread_create(&thread, NULL, helper_fadeout, (void*) fade); +#else + Thread = _beginthread(&helper_fadeout, 0, (void*) fade); +#endif + else { + fprintf(stderr, "ERROR: unknown direction for fade (%d)\n", direction); + free(fade); + return AL_FALSE; + } + } + +#ifndef _WIN32 + pthread_detach(thread); +#endif + + alGetError(); /* clear any AL errors beforehand */ + + return AL_TRUE; + } + + + ALboolean openal_fadeout (uint32_t index, uint16_t quantity) { + /*wrapper for fadeout*/ + return openal_fade(index, quantity, FADE_OUT); + } + + + ALboolean openal_fadein (uint32_t index, uint16_t quantity) { + /*wrapper for fadein*/ + return openal_fade(index, quantity, FADE_IN); + } + + + ALboolean openal_setposition (uint32_t index, float x, float y, float z) { + if(openalReady == AL_FALSE) { + fprintf(stderr, "ERROR: OpenAL not initialized\n"); + return AL_FALSE; + } + if (index >= globalindex) { + fprintf(stderr, "ERROR: index out of bounds (got %d, max %d)\n", index, globalindex); + return AL_FALSE; + } + + alSource3f(Sources[index], AL_POSITION, x, y, z); + if (AlGetError2("ERROR %d: setting position for sound %d\n", index) != AL_TRUE) + return AL_FALSE; + + return AL_TRUE; + } + + + ALboolean openal_playsound (uint32_t index){ + if(openalReady == AL_FALSE) { + fprintf(stderr, "ERROR: OpenAL not initialized\n"); + return AL_FALSE; + } + + /*Play sound number index*/ + if (index >= globalindex) { + fprintf(stderr, "ERROR: index out of bounds (got %d, max %d)\n", index, globalindex); + return AL_FALSE; + } + alSourcePlay(Sources[index]); + if (AlGetError2("ERROR %d: Playing sound %d\n", index) != AL_TRUE) + return AL_FALSE; + + alGetError(); /* clear any AL errors beforehand */ + + return AL_TRUE; + } + + + ALboolean openal_pausesound(uint32_t index){ + if(openalReady == AL_FALSE) { + fprintf(stderr, "ERROR: OpenAL not initialized\n"); + return AL_FALSE; + } + + /*Pause sound number index*/ + if (index >= globalindex) { + fprintf(stderr, "ERROR: index out of bounds (got %d, max %d)\n", index, globalindex); + return AL_FALSE; + } + alSourcePause(Sources[index]); + if (AlGetError2("ERROR %d: Pausing sound %d\n", index) != AL_TRUE) + return AL_FALSE; + + return AL_TRUE; + } + + + ALboolean openal_stopsound(uint32_t index){ + if(openalReady == AL_FALSE) { + fprintf(stderr, "ERROR: OpenAL not initialized\n"); + return AL_FALSE; + } + + /*Stop sound number index*/ + if (index >= globalindex) { + fprintf(stderr, "ERROR: index out of bounds (got %d, max %d)\n", index, globalindex); + return AL_FALSE; + } + alSourceStop(Sources[index]); + if (AlGetError2("ERROR %d: Stopping sound %d\n", index) != AL_TRUE) + return AL_FALSE; + + alGetError(); /* clear any AL errors beforehand */ + + return AL_TRUE; + } + +#ifdef __CPLUSPLUS +} +#endif