669 lines
17 KiB
C++
669 lines
17 KiB
C++
/*
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Copyright (C) 2003, 2010 - Wolfire Games
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Copyright (C) 2010-2017 - Lugaru contributors (see AUTHORS file)
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This file is part of Lugaru.
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Lugaru is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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Lugaru is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Lugaru. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "Audio/openal_wrapper.hpp"
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#include "Audio/Sounds.hpp"
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#include "Game.hpp"
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#include "Math/XYZ.hpp"
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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extern float slomofreq;
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// NOTE:
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// FMOD uses a Left Handed Coordinate system, OpenAL uses a Right Handed
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// one...so we just need to flip the sign on the Z axis when appropriate.
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typedef struct
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{
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ALuint sid;
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OPENAL_SAMPLE* sample;
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bool startpaused;
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float position[3];
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} OPENAL_Channels;
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typedef struct OPENAL_SAMPLE
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{
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char* name;
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ALuint bid; // buffer id.
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int mode;
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int is2d;
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} OPENAL_SAMPLE;
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static size_t num_channels = 0;
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static OPENAL_Channels* impl_channels = NULL;
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static bool initialized = false;
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static float listener_position[3];
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static void set_channel_position(const int channel, const float x,
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const float y, const float z)
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{
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OPENAL_Channels* chan = &impl_channels[channel];
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chan->position[0] = x;
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chan->position[1] = y;
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chan->position[2] = z;
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OPENAL_SAMPLE* sptr = chan->sample;
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if (sptr == NULL) {
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return;
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}
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const ALuint sid = chan->sid;
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const bool no_attenuate = sptr->is2d;
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if (no_attenuate) {
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alSourcei(sid, AL_SOURCE_RELATIVE, AL_TRUE);
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alSource3f(sid, AL_POSITION, 0.0f, 0.0f, 0.0f);
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} else {
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alSourcei(sid, AL_SOURCE_RELATIVE, AL_FALSE);
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alSource3f(sid, AL_POSITION, x, y, z);
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}
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}
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AL_API void OPENAL_3D_Listener_SetAttributes(const float* pos, const float*, float fx, float fy, float fz, float tx, float ty, float tz)
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{
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if (!initialized) {
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return;
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}
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if (pos != NULL) {
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alListener3f(AL_POSITION, pos[0], pos[1], -pos[2]);
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listener_position[0] = pos[0];
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listener_position[1] = pos[1];
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listener_position[2] = -pos[2];
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}
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ALfloat vec[6] = { fx, fy, -fz, tx, ty, -tz };
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alListenerfv(AL_ORIENTATION, vec);
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// we ignore velocity, since doppler's broken in the Linux AL at the moment...
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// adjust existing positions...
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for (unsigned i = 0; i < num_channels; i++) {
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const float* p = impl_channels[i].position;
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set_channel_position(i, p[0], p[1], p[2]);
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}
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}
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AL_API signed char OPENAL_3D_SetAttributes(int channel, const float* pos)
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{
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if (!initialized) {
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return false;
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}
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if ((channel < 0) || (channel >= (int)num_channels)) {
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return false;
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}
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if (pos != NULL) {
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set_channel_position(channel, pos[0], pos[1], -pos[2]);
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}
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// we ignore velocity, since doppler's broken in the Linux AL at the moment...
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return true;
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}
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AL_API signed char OPENAL_3D_SetAttributes_(int channel, const XYZ& pos)
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{
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if (!initialized) {
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return false;
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}
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if ((channel < 0) || (channel >= (int)num_channels)) {
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return false;
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}
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set_channel_position(channel, pos.x, pos.y, -pos.z);
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return true;
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}
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AL_API signed char OPENAL_Init(int mixrate, int maxsoftwarechannels, unsigned int flags)
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{
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if (initialized) {
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return false;
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}
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if (maxsoftwarechannels == 0) {
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return false;
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}
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if (flags != 0) { // unsupported.
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return false;
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}
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ALCdevice* dev = alcOpenDevice(NULL);
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if (!dev) {
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return false;
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}
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ALint caps[] = { ALC_FREQUENCY, mixrate, 0 };
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ALCcontext* ctx = alcCreateContext(dev, caps);
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if (!ctx) {
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alcCloseDevice(dev);
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return false;
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}
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alcMakeContextCurrent(ctx);
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alcProcessContext(ctx);
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if (commandLineOptions[OPENALINFO]) {
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printf("AL_VENDOR: %s\n", (char*)alGetString(AL_VENDOR));
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printf("AL_RENDERER: %s\n", (char*)alGetString(AL_RENDERER));
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printf("AL_VERSION: %s\n", (char*)alGetString(AL_VERSION));
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printf("AL_EXTENSIONS: %s\n", (char*)alGetString(AL_EXTENSIONS));
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}
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num_channels = maxsoftwarechannels;
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impl_channels = new OPENAL_Channels[maxsoftwarechannels];
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memset(impl_channels, '\0', sizeof(OPENAL_Channels) * num_channels);
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for (unsigned i = 0; i < num_channels; i++) {
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alGenSources(1, &impl_channels[i].sid); // !!! FIXME: verify this didn't fail!
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}
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initialized = true;
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return true;
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}
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AL_API void OPENAL_Close()
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{
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if (!initialized) {
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return;
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}
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ALCcontext* ctx = alcGetCurrentContext();
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if (ctx) {
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for (unsigned i = 0; i < num_channels; i++) {
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alSourceStop(impl_channels[i].sid);
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alSourcei(impl_channels[i].sid, AL_BUFFER, 0);
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alDeleteSources(1, &impl_channels[i].sid);
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}
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ALCdevice* dev = alcGetContextsDevice(ctx);
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alcMakeContextCurrent(NULL);
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alcSuspendContext(ctx);
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alcDestroyContext(ctx);
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alcCloseDevice(dev);
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}
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num_channels = 0;
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delete[] impl_channels;
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impl_channels = NULL;
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initialized = false;
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}
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static OPENAL_SAMPLE* OPENAL_GetCurrentSample(int channel)
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{
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if (!initialized) {
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return NULL;
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}
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if ((channel < 0) || (channel >= (int)num_channels)) {
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return NULL;
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}
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return impl_channels[channel].sample;
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}
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static signed char OPENAL_GetPaused(int channel)
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{
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if (!initialized) {
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return false;
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}
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if ((channel < 0) || (channel >= (int)num_channels)) {
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return false;
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}
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if (impl_channels[channel].startpaused) {
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return (true);
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}
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ALint state = 0;
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alGetSourceiv(impl_channels[channel].sid, AL_SOURCE_STATE, &state);
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return ((state == AL_PAUSED) ? true : false);
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}
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static unsigned int OPENAL_GetLoopMode(int channel)
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{
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if (!initialized) {
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return 0;
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}
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if ((channel < 0) || (channel >= (int)num_channels)) {
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return 0;
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}
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ALint loop = 0;
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alGetSourceiv(impl_channels[channel].sid, AL_LOOPING, &loop);
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if (loop) {
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return (OPENAL_LOOP_NORMAL);
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}
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return OPENAL_LOOP_OFF;
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}
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static signed char OPENAL_IsPlaying(int channel)
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{
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if (!initialized) {
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return false;
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}
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if ((channel < 0) || (channel >= (int)num_channels)) {
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return false;
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}
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ALint state = 0;
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alGetSourceiv(impl_channels[channel].sid, AL_SOURCE_STATE, &state);
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return ((state == AL_PLAYING) ? true : false);
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}
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static int OPENAL_PlaySoundEx(int channel, OPENAL_SAMPLE* sptr, OPENAL_DSPUNIT* dsp, signed char startpaused)
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{
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if (!initialized) {
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return -1;
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}
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if (sptr == NULL) {
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return -1;
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}
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if (dsp != NULL) {
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return -1;
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}
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if (channel == OPENAL_FREE) {
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for (unsigned i = 0; i < num_channels; i++) {
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ALint state = 0;
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alGetSourceiv(impl_channels[i].sid, AL_SOURCE_STATE, &state);
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if ((state != AL_PLAYING) && (state != AL_PAUSED)) {
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channel = i;
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break;
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}
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}
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}
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if ((channel < 0) || (channel >= (int)num_channels)) {
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return -1;
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}
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alSourceStop(impl_channels[channel].sid);
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impl_channels[channel].sample = sptr;
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alSourcei(impl_channels[channel].sid, AL_BUFFER, sptr->bid);
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alSourcei(impl_channels[channel].sid, AL_LOOPING, (sptr->mode == OPENAL_LOOP_OFF) ? AL_FALSE : AL_TRUE);
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set_channel_position(channel, 0.0f, 0.0f, 0.0f);
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impl_channels[channel].startpaused = ((startpaused) ? true : false);
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if (!startpaused) {
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alSourcePlay(impl_channels[channel].sid);
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}
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return channel;
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}
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static void* decode_to_pcm(const char* _fname, ALenum& format, ALsizei& size, ALuint& freq)
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{
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#ifdef __POWERPC__
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const int bigendian = 1;
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#else
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const int bigendian = 0;
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#endif
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// !!! FIXME: if it's not Ogg, we don't have a decoder. I'm lazy. :/
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char* fname = (char*)alloca(strlen(_fname) + 16);
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strcpy(fname, _fname);
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char* ptr = strchr(fname, '.');
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if (ptr) {
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*ptr = '\0';
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}
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strcat(fname, ".ogg");
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// just in case...
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FILE* io = fopen(fname, "rb");
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if (io == NULL) {
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return NULL;
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}
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ALubyte* retval = NULL;
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#if 0 // untested, so disable this!
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// Can we just feed it to the AL compressed?
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if (alIsExtensionPresent((const ALubyte *) "AL_EXT_vorbis")) {
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format = alGetEnumValue((const ALubyte *) "AL_FORMAT_VORBIS_EXT");
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freq = 44100;
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fseek(io, 0, SEEK_END);
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size = ftell(io);
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fseek(io, 0, SEEK_SET);
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retval = (ALubyte *) malloc(size);
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size_t rc = fread(retval, size, 1, io);
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fclose(io);
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if (rc != 1) {
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free(retval);
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return NULL;
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}
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return retval;
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}
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#endif
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// Uncompress and feed to the AL.
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OggVorbis_File vf;
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memset(&vf, '\0', sizeof(vf));
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if (ov_open(io, &vf, NULL, 0) == 0) {
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int bitstream = 0;
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vorbis_info* info = ov_info(&vf, -1);
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size = 0;
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format = (info->channels == 1) ? AL_FORMAT_MONO16 : AL_FORMAT_STEREO16;
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freq = info->rate;
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if ((info->channels != 1) && (info->channels != 2)) {
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ov_clear(&vf);
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return NULL;
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}
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char buf[1024 * 16];
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long rc = 0;
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size_t allocated = 64 * 1024;
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retval = (ALubyte*)malloc(allocated);
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while ((rc = ov_read(&vf, buf, sizeof(buf), bigendian, 2, 1, &bitstream)) != 0) {
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if (rc > 0) {
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size += rc;
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if (size >= (int)allocated) {
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allocated *= 2;
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ALubyte* tmp = (ALubyte*)realloc(retval, allocated);
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if (tmp == NULL) {
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free(retval);
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retval = NULL;
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break;
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}
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retval = tmp;
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}
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memcpy(retval + (size - rc), buf, rc);
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}
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}
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ov_clear(&vf);
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return retval;
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}
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fclose(io);
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return NULL;
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}
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AL_API OPENAL_SAMPLE* OPENAL_Sample_Load(int index, const char* name_or_data, unsigned int mode, int offset, int length)
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{
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if (!initialized) {
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return NULL;
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}
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if (index != OPENAL_FREE) {
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return NULL; // this is all the game does...
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}
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if (offset != 0) {
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return NULL; // this is all the game does...
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}
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if (length != 0) {
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return NULL; // this is all the game does...
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}
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if ((mode != OPENAL_HW3D) && (mode != OPENAL_2D)) {
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return NULL; // this is all the game does...
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}
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OPENAL_SAMPLE* retval = NULL;
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ALenum format = AL_NONE;
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ALsizei size = 0;
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ALuint frequency = 0;
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void* data = decode_to_pcm(name_or_data, format, size, frequency);
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if (data == NULL) {
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return NULL;
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}
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ALuint bid = 0;
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alGetError();
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alGenBuffers(1, &bid);
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if (alGetError() == AL_NO_ERROR) {
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alBufferData(bid, format, data, size, frequency);
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retval = new OPENAL_SAMPLE;
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retval->bid = bid;
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retval->mode = OPENAL_LOOP_OFF;
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retval->is2d = (mode == OPENAL_2D);
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retval->name = new char[strlen(name_or_data) + 1];
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if (retval->name) {
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strcpy(retval->name, name_or_data);
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}
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}
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free(data);
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return (retval);
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}
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AL_API void OPENAL_Sample_Free(OPENAL_SAMPLE* sptr)
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{
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if (!initialized) {
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return;
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}
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if (sptr) {
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for (unsigned i = 0; i < num_channels; i++) {
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if (impl_channels[i].sample == sptr) {
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alSourceStop(impl_channels[i].sid);
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alSourcei(impl_channels[i].sid, AL_BUFFER, 0);
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impl_channels[i].sample = NULL;
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}
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}
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alDeleteBuffers(1, &sptr->bid);
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delete[] sptr->name;
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delete sptr;
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}
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}
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static signed char OPENAL_Sample_SetMode(OPENAL_SAMPLE* sptr, unsigned int mode)
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{
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if (!initialized) {
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return false;
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}
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if ((mode != OPENAL_LOOP_NORMAL) && (mode != OPENAL_LOOP_OFF)) {
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return false;
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}
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if (!sptr) {
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return false;
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}
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sptr->mode = mode;
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return true;
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}
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AL_API signed char OPENAL_SetFrequency(int channel, bool slomo)
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{
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if (!initialized) {
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return false;
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}
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if (channel == OPENAL_ALL) {
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for (unsigned i = 0; i < num_channels; i++) {
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OPENAL_SetFrequency(i, slomo);
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}
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return true;
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}
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if ((channel < 0) || (channel >= (int)num_channels)) {
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return false;
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}
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if (slomo) {
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alSourcef(impl_channels[channel].sid, AL_PITCH, ((ALfloat)slomofreq) / 44100.0f);
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} else {
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alSourcef(impl_channels[channel].sid, AL_PITCH, 1.0f);
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}
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return true;
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}
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AL_API signed char OPENAL_SetVolume(int channel, int vol)
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{
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if (!initialized) {
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return false;
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}
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if (channel == OPENAL_ALL) {
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for (unsigned i = 0; i < num_channels; i++) {
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OPENAL_SetVolume(i, vol);
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}
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return true;
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}
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if ((channel < 0) || (channel >= (int)num_channels)) {
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return false;
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}
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if (vol < 0) {
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vol = 0;
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} else if (vol > 255) {
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vol = 255;
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}
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ALfloat gain = ((ALfloat)vol) / 255.0f;
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alSourcef(impl_channels[channel].sid, AL_GAIN, gain);
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return true;
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}
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AL_API signed char OPENAL_SetPaused(int channel, signed char paused)
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{
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if (!initialized) {
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return false;
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}
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|
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if (channel == OPENAL_ALL) {
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for (unsigned i = 0; i < num_channels; i++) {
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OPENAL_SetPaused(i, paused);
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}
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return true;
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}
|
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|
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if ((channel < 0) || (channel >= (int)num_channels)) {
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return false;
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}
|
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|
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ALint state = 0;
|
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if (impl_channels[channel].startpaused) {
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state = AL_PAUSED;
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} else {
|
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alGetSourceiv(impl_channels[channel].sid, AL_SOURCE_STATE, &state);
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|
}
|
|
|
|
if ((paused) && (state == AL_PLAYING)) {
|
|
alSourcePause(impl_channels[channel].sid);
|
|
} else if ((!paused) && (state == AL_PAUSED)) {
|
|
alSourcePlay(impl_channels[channel].sid);
|
|
impl_channels[channel].startpaused = false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
AL_API void OPENAL_SetSFXMasterVolume(int volume)
|
|
{
|
|
if (!initialized) {
|
|
return;
|
|
}
|
|
ALfloat gain = ((ALfloat)volume) / 255.0f;
|
|
alListenerf(AL_GAIN, gain);
|
|
}
|
|
|
|
AL_API signed char OPENAL_StopSound(int channel)
|
|
{
|
|
if (!initialized) {
|
|
return false;
|
|
}
|
|
|
|
if (channel == OPENAL_ALL) {
|
|
for (unsigned i = 0; i < num_channels; i++) {
|
|
OPENAL_StopSound(i);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
if ((channel < 0) || (channel >= (int)num_channels)) {
|
|
return false;
|
|
}
|
|
alSourceStop(impl_channels[channel].sid);
|
|
impl_channels[channel].startpaused = false;
|
|
return true;
|
|
}
|
|
|
|
static OPENAL_SAMPLE* OPENAL_Stream_GetSample(OPENAL_STREAM* stream)
|
|
{
|
|
if (!initialized) {
|
|
return NULL;
|
|
}
|
|
return (OPENAL_SAMPLE*)stream;
|
|
}
|
|
|
|
static int OPENAL_Stream_PlayEx(int channel, OPENAL_STREAM* stream, OPENAL_DSPUNIT* dsp, signed char startpaused)
|
|
{
|
|
return OPENAL_PlaySoundEx(channel, (OPENAL_SAMPLE*)stream, dsp, startpaused);
|
|
}
|
|
|
|
static signed char OPENAL_Stream_Stop(OPENAL_STREAM* stream)
|
|
{
|
|
if (!initialized) {
|
|
return false;
|
|
}
|
|
for (unsigned i = 0; i < num_channels; i++) {
|
|
if (impl_channels[i].sample == (OPENAL_SAMPLE*)stream) {
|
|
alSourceStop(impl_channels[i].sid);
|
|
impl_channels[i].startpaused = false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
AL_API signed char OPENAL_Stream_SetMode(OPENAL_STREAM* stream, unsigned int mode)
|
|
{
|
|
return OPENAL_Sample_SetMode((OPENAL_SAMPLE*)stream, mode);
|
|
}
|
|
|
|
AL_API void OPENAL_Update()
|
|
{
|
|
if (!initialized) {
|
|
return;
|
|
}
|
|
alcProcessContext(alcGetCurrentContext());
|
|
}
|
|
|
|
extern int channels[];
|
|
|
|
extern "C" void PlaySoundEx(int chan, OPENAL_SAMPLE* sptr, OPENAL_DSPUNIT* dsp, signed char startpaused)
|
|
{
|
|
const OPENAL_SAMPLE* currSample = OPENAL_GetCurrentSample(channels[chan]);
|
|
if (currSample && currSample == samp[chan]) {
|
|
if (OPENAL_GetPaused(channels[chan])) {
|
|
OPENAL_StopSound(channels[chan]);
|
|
channels[chan] = OPENAL_FREE;
|
|
} else if (OPENAL_IsPlaying(channels[chan])) {
|
|
int loop_mode = OPENAL_GetLoopMode(channels[chan]);
|
|
if (loop_mode & OPENAL_LOOP_OFF) {
|
|
channels[chan] = OPENAL_FREE;
|
|
}
|
|
}
|
|
} else {
|
|
channels[chan] = OPENAL_FREE;
|
|
}
|
|
|
|
channels[chan] = OPENAL_PlaySoundEx(channels[chan], sptr, dsp, startpaused);
|
|
if (channels[chan] < 0) {
|
|
channels[chan] = OPENAL_PlaySoundEx(OPENAL_FREE, sptr, dsp, startpaused);
|
|
}
|
|
}
|
|
|
|
extern "C" void PlayStreamEx(int chan, OPENAL_STREAM* sptr, OPENAL_DSPUNIT* dsp, signed char startpaused)
|
|
{
|
|
const OPENAL_SAMPLE* currSample = OPENAL_GetCurrentSample(channels[chan]);
|
|
if (currSample && currSample == OPENAL_Stream_GetSample(sptr)) {
|
|
OPENAL_StopSound(channels[chan]);
|
|
OPENAL_Stream_Stop(sptr);
|
|
} else {
|
|
OPENAL_Stream_Stop(sptr);
|
|
channels[chan] = OPENAL_FREE;
|
|
}
|
|
|
|
channels[chan] = OPENAL_Stream_PlayEx(channels[chan], sptr, dsp, startpaused);
|
|
if (channels[chan] < 0) {
|
|
channels[chan] = OPENAL_Stream_PlayEx(OPENAL_FREE, sptr, dsp, startpaused);
|
|
}
|
|
}
|