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SDL/WASM Port
This commit is contained in:
TheBrokenRail
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iProgramInCpp
iProgramInCpp
parent
0b16b2843a
commit
0fbe90752d
245
platforms/sdl/SoundSystemAL.cpp
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245
platforms/sdl/SoundSystemAL.cpp
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#include "SoundSystemAL.hpp"
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#include "client/common/Utils.hpp"
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SoundSystemAL::SoundSystemAL() {
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device = alcOpenDevice(NULL);
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if (!device) {
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LogMsg("Unable To Load Audio Engine");
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return;
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}
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// Create Context
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context = alcCreateContext(device, NULL);
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ALCenum err = alcGetError(device);
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if (err != ALC_NO_ERROR) {
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LogMsg("Unable To Open Audio Context: %s", alcGetString(device, err));
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return;
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}
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// Select Context
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alcMakeContextCurrent(context);
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err = alcGetError(device);
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if (err != ALC_NO_ERROR) {
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LogMsg("Unable To Select Audio Context: %s", alcGetString(device, err));
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return;
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}
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// Set Distance Model
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alDistanceModel(AL_LINEAR_DISTANCE_CLAMPED);
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// Mark As Loaded
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loaded = true;
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}
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SoundSystemAL::~SoundSystemAL() {
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if (loaded) {
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// Delete Audio Sources
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delete_sources();
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// Delete Audio Buffers
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delete_buffers();
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// Deselect Context
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alcMakeContextCurrent(NULL);
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ALCenum err = alcGetError(device);
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if (err != ALC_NO_ERROR) {
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LogMsg("Unable To Deselect Audio Context: %s", alcGetString(device, err));
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}
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// Destroy Context
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alcDestroyContext(context);
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err = alcGetError(device);
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if (err != ALC_NO_ERROR) {
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LogMsg("Unable To Destroy Audio Context: %s", alcGetString(device, err));
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}
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// Close Device
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alcCloseDevice(device);
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err = alcGetError(device);
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if (err != ALC_NO_ERROR) {
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LogMsg("Unable To Close Audio Device: %s", alcGetString(device, err));
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}
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}
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}
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// Error Checking
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#define AL_ERROR_CHECK() AL_ERROR_CHECK_MANUAL(alGetError())
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#define AL_ERROR_CHECK_MANUAL(val) \
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{ \
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ALenum __err = val; \
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if (__err != AL_NO_ERROR) { \
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LogMsg("(%s:%i) OpenAL Error: %s", __FILE__, __LINE__, alGetString(__err)); \
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exit(EXIT_FAILURE); \
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} \
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}
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// Delete Sources
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void SoundSystemAL::delete_sources() {
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if (loaded) {
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for (ALuint source : idle_sources) {
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alDeleteSources(1, &source);
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AL_ERROR_CHECK();
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}
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for (ALuint source : sources) {
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alDeleteSources(1, &source);
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AL_ERROR_CHECK();
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}
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}
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idle_sources.clear();
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sources.clear();
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}
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// Delete Buffers
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void SoundSystemAL::delete_buffers() {
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if (loaded) {
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for (auto &it : buffers) {
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if (it.second && alIsBuffer(it.second)) {
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alDeleteBuffers(1, &it.second);
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AL_ERROR_CHECK();
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}
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}
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}
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buffers.clear();
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}
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// Get Buffer
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ALuint SoundSystemAL::get_buffer(const SoundDesc &sound) {
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if (buffers.count(sound.m_pData) > 0) {
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return buffers[sound.m_pData];
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} else {
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// Sound Format
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ALenum format = AL_NONE;
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if (sound.m_header.m_channels == 1) {
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format = sound.m_header.m_bytes_per_sample == 2 ? AL_FORMAT_MONO16 : AL_FORMAT_MONO8;
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} else if (sound.m_header.m_channels == 2) {
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format = sound.m_header.m_bytes_per_sample == 2 ? AL_FORMAT_STEREO16 : AL_FORMAT_STEREO8;
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}
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// Sound Data Size
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int size = sound.m_header.m_length * sound.m_header.m_bytes_per_sample;
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// Create Buffer
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ALuint buffer;
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alGenBuffers(1, &buffer);
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AL_ERROR_CHECK();
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alBufferData(buffer, format, sound.m_pData, size, sound.m_header.m_sample_rate);
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AL_ERROR_CHECK();
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// Store
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buffers[sound.m_pData] = buffer;
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return buffer;
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}
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}
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void SoundSystemAL::update(float x, float y, float z, float yaw) {
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// Check
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if (loaded) {
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// Update Listener Volume
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float volume = 1;
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alListenerf(AL_GAIN, volume);
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AL_ERROR_CHECK();
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// Update Listener Position
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alListener3f(AL_POSITION, x, y, z);
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AL_ERROR_CHECK();
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// Update Listener Orientation
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float radian_yaw = yaw * (M_PI / 180);
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ALfloat orientation[] = {-sinf(radian_yaw), 0.0f, cosf(radian_yaw), 0.0f, 1.0f, 0.0f};
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alListenerfv(AL_ORIENTATION, orientation);
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AL_ERROR_CHECK();
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// Clear Finished Sources
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std::vector<ALuint>::iterator it = sources.begin();
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while (it != sources.end()) {
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ALuint source = *it;
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bool remove = false;
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// Check
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if (source && alIsSource(source)) {
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// Is Valid Source
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ALint source_state;
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alGetSourcei(source, AL_SOURCE_STATE, &source_state);
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AL_ERROR_CHECK();
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if (source_state != AL_PLAYING) {
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// Finished Playing
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remove = true;
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if (idle_sources.size() < MAX_IDLE_SOURCES) {
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idle_sources.push_back(source);
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} else {
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alDeleteSources(1, &source);
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AL_ERROR_CHECK();
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}
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}
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} else {
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// Not A Source
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remove = true;
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}
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// Remove If Needed
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if (remove) {
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it = sources.erase(it);
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} else {
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++it;
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}
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}
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}
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}
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void SoundSystemAL::play(const SoundDesc &sound, float x, float y, float z, float volume, float pitch, bool is_ui) {
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if (loaded) {
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// Load Sound
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ALuint buffer = get_buffer(sound);
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if (volume > 0.0f && buffer) {
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// Get Source
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ALuint al_source;
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if (idle_sources.size() > 0) {
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// Use Idle Source
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al_source = idle_sources.back();
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idle_sources.pop_back();
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} else {
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// Create Source
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alGenSources(1, &al_source);
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// Special Out-Of-Memory Handling
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{
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ALenum err = alGetError();
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if (err == AL_OUT_OF_MEMORY) {
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return;
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} else {
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AL_ERROR_CHECK_MANUAL(err);
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}
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}
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}
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// Set Properties
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alSourcef(al_source, AL_PITCH, pitch);
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AL_ERROR_CHECK();
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alSourcef(al_source, AL_GAIN, volume);
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AL_ERROR_CHECK();
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alSource3f(al_source, AL_POSITION, x, y, z);
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AL_ERROR_CHECK();
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alSource3f(al_source, AL_VELOCITY, 0, 0, 0);
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AL_ERROR_CHECK();
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alSourcei(al_source, AL_LOOPING, AL_FALSE);
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AL_ERROR_CHECK();
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alSourcei(al_source, AL_SOURCE_RELATIVE, is_ui ? AL_TRUE : AL_FALSE);
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AL_ERROR_CHECK();
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// Set Attenuation
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alSourcef(al_source, AL_MAX_DISTANCE, 16.0f);
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AL_ERROR_CHECK();
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alSourcef(al_source, AL_ROLLOFF_FACTOR, 6.0f);
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AL_ERROR_CHECK();
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alSourcef(al_source, AL_REFERENCE_DISTANCE, 5.0f);
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AL_ERROR_CHECK();
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// Set Buffer
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alSourcei(al_source, AL_BUFFER, buffer);
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AL_ERROR_CHECK();
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// Play
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alSourcePlay(al_source);
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AL_ERROR_CHECK();
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sources.push_back(al_source);
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}
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}
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}
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