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Diffstat (limited to 'indra/llaudio/llaudioengine_fmodstudio.cpp')
| -rw-r--r-- | indra/llaudio/llaudioengine_fmodstudio.cpp | 753 |
1 files changed, 753 insertions, 0 deletions
diff --git a/indra/llaudio/llaudioengine_fmodstudio.cpp b/indra/llaudio/llaudioengine_fmodstudio.cpp new file mode 100644 index 0000000000..70b3a08473 --- /dev/null +++ b/indra/llaudio/llaudioengine_fmodstudio.cpp @@ -0,0 +1,753 @@ +/** + * @file audioengine_fmodstudio.cpp + * @brief Implementation of LLAudioEngine class abstracting the audio + * support as a FMODSTUDIO implementation + * + * $LicenseInfo:firstyear=2020&license=viewerlgpl$ + * Second Life Viewer Source Code + * Copyright (C) 2020, Linden Research, Inc. + * + * This library 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 2.1 of the License only. + * + * This library 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 library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + * + * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA + * $/LicenseInfo$ + */ + +#include "linden_common.h" + +#include "llstreamingaudio.h" +#include "llstreamingaudio_fmodstudio.h" + +#include "llaudioengine_fmodstudio.h" +#include "lllistener_fmodstudio.h" + +#include "llerror.h" +#include "llmath.h" +#include "llrand.h" + +#include "fmodstudio/fmod.hpp" +#include "fmodstudio/fmod_errors.h" +#include "lldir.h" +#include "llapr.h" + +#include "sound_ids.h" + +FMOD_RESULT F_CALLBACK windCallback(FMOD_DSP_STATE *dsp_state, float *inbuffer, float *outbuffer, unsigned int length, int inchannels, int *outchannels); + +FMOD::ChannelGroup *LLAudioEngine_FMODSTUDIO::mChannelGroups[LLAudioEngine::AUDIO_TYPE_COUNT] = {0}; + +LLAudioEngine_FMODSTUDIO::LLAudioEngine_FMODSTUDIO(bool enable_profiler) +: mInited(false), + mWindGen(NULL), + mWindDSP(NULL), + mSystem(NULL), + mEnableProfiler(enable_profiler), + mWindDSPDesc(NULL) +{ +} + + +LLAudioEngine_FMODSTUDIO::~LLAudioEngine_FMODSTUDIO() +{ + // mWindDSPDesc, mWindGen and mWindDSP get cleaned up on cleanupWind in LLAudioEngine::shutdown() + // mSystem gets cleaned up at shutdown() +} + + +static inline bool Check_FMOD_Error(FMOD_RESULT result, const char *string) +{ + if (result == FMOD_OK) + return false; + LL_DEBUGS("FMOD") << string << " Error: " << FMOD_ErrorString(result) << LL_ENDL; + return true; +} + +bool LLAudioEngine_FMODSTUDIO::init(const S32 num_channels, void* userdata, const std::string &app_title) +{ + U32 version; + FMOD_RESULT result; + + LL_DEBUGS("AppInit") << "LLAudioEngine_FMODSTUDIO::init() initializing FMOD" << LL_ENDL; + + result = FMOD::System_Create(&mSystem); + if (Check_FMOD_Error(result, "FMOD::System_Create")) + return false; + + //will call LLAudioEngine_FMODSTUDIO::allocateListener, which needs a valid mSystem pointer. + LLAudioEngine::init(num_channels, userdata, app_title); + + result = mSystem->getVersion(&version); + Check_FMOD_Error(result, "FMOD::System::getVersion"); + + if (version < FMOD_VERSION) + { + LL_WARNS("AppInit") << "FMOD Studio version mismatch, actual: " << version + << " expected:" << FMOD_VERSION << LL_ENDL; + } + + // In this case, all sounds, PLUS wind and stream will be software. + result = mSystem->setSoftwareChannels(num_channels + 2); + Check_FMOD_Error(result, "FMOD::System::setSoftwareChannels"); + + FMOD_ADVANCEDSETTINGS settings; + memset(&settings, 0, sizeof(settings)); + settings.cbSize = sizeof(FMOD_ADVANCEDSETTINGS); + settings.resamplerMethod = FMOD_DSP_RESAMPLER_LINEAR; + + result = mSystem->setAdvancedSettings(&settings); + Check_FMOD_Error(result, "FMOD::System::setAdvancedSettings"); + + // FMOD_INIT_THREAD_UNSAFE Disables thread safety for API calls. + // Only use this if FMOD is being called from a single thread, and if Studio API is not being used. + U32 fmod_flags = FMOD_INIT_NORMAL | FMOD_INIT_3D_RIGHTHANDED | FMOD_INIT_THREAD_UNSAFE; + if (mEnableProfiler) + { + fmod_flags |= FMOD_INIT_PROFILE_ENABLE; + } + +#if LL_LINUX + bool audio_ok = false; + + if (!audio_ok) + { + const char* env_string = getenv("LL_BAD_FMOD_PULSEAUDIO"); + if (NULL == env_string) + { + LL_DEBUGS("AppInit") << "Trying PulseAudio audio output..." << LL_ENDL; + if (mSystem->setOutput(FMOD_OUTPUTTYPE_PULSEAUDIO) == FMOD_OK && + (result = mSystem->init(num_channels + 2, fmod_flags, const_cast<char*>(app_title.c_str()))) == FMOD_OK) + { + LL_DEBUGS("AppInit") << "PulseAudio output initialized OKAY" << LL_ENDL; + audio_ok = true; + } + else + { + Check_FMOD_Error(result, "PulseAudio audio output FAILED to initialize"); + } + } + else + { + LL_DEBUGS("AppInit") << "PulseAudio audio output SKIPPED" << LL_ENDL; + } + } + if (!audio_ok) + { + const char* env_string = getenv("LL_BAD_FMOD_ALSA"); + if (NULL == env_string) + { + LL_DEBUGS("AppInit") << "Trying ALSA audio output..." << LL_ENDL; + if (mSystem->setOutput(FMOD_OUTPUTTYPE_ALSA) == FMOD_OK && + (result = mSystem->init(num_channels + 2, fmod_flags, 0)) == FMOD_OK) + { + LL_DEBUGS("AppInit") << "ALSA audio output initialized OKAY" << LL_ENDL; + audio_ok = true; + } + else + { + Check_FMOD_Error(result, "ALSA audio output FAILED to initialize"); + } + } + else + { + LL_DEBUGS("AppInit") << "ALSA audio output SKIPPED" << LL_ENDL; + } + } + if (!audio_ok) + { + LL_WARNS("AppInit") << "Overall audio init failure." << LL_ENDL; + return false; + } + + // We're interested in logging which output method we + // ended up with, for QA purposes. + FMOD_OUTPUTTYPE output_type; + mSystem->getOutput(&output_type); + switch (output_type) + { + case FMOD_OUTPUTTYPE_NOSOUND: + LL_INFOS("AppInit") << "Audio output: NoSound" << LL_ENDL; break; + case FMOD_OUTPUTTYPE_PULSEAUDIO: + LL_INFOS("AppInit") << "Audio output: PulseAudio" << LL_ENDL; break; + case FMOD_OUTPUTTYPE_ALSA: + LL_INFOS("AppInit") << "Audio output: ALSA" << LL_ENDL; break; + default: + LL_INFOS("AppInit") << "Audio output: Unknown!" << LL_ENDL; break; + }; +#else // LL_LINUX + + // initialize the FMOD engine + // number of channel in this case looks to be identiacal to number of max simultaneously + // playing objects and we can set practically any number + result = mSystem->init(num_channels + 2, fmod_flags, 0); + if (Check_FMOD_Error(result, "Error initializing FMOD Studio with default settins, retrying with other format")) + { + result = mSystem->setSoftwareFormat(44100, FMOD_SPEAKERMODE_STEREO, 0/*- ignore*/); + if (Check_FMOD_Error(result, "Error setting sotware format. Can't init.")) + { + return false; + } + result = mSystem->init(num_channels + 2, fmod_flags, 0); + } + if (Check_FMOD_Error(result, "Error initializing FMOD Studio")) + { + // If it fails here and (result == FMOD_ERR_OUTPUT_CREATEBUFFER), + // we can retry with other settings + return false; + } +#endif + + // set up our favourite FMOD-native streaming audio implementation if none has already been added + if (!getStreamingAudioImpl()) // no existing implementation added + setStreamingAudioImpl(new LLStreamingAudio_FMODSTUDIO(mSystem)); + + LL_INFOS("AppInit") << "LLAudioEngine_FMODSTUDIO::init() FMOD Studio initialized correctly" << LL_ENDL; + + int r_numbuffers, r_samplerate, r_channels; + unsigned int r_bufferlength; + char r_name[512]; + int latency = 100; + mSystem->getDSPBufferSize(&r_bufferlength, &r_numbuffers); + LL_INFOS("AppInit") << "LLAudioEngine_FMODSTUDIO::init(): r_bufferlength=" << r_bufferlength << " bytes" << LL_ENDL; + LL_INFOS("AppInit") << "LLAudioEngine_FMODSTUDIO::init(): r_numbuffers=" << r_numbuffers << LL_ENDL; + + mSystem->getDriverInfo(0, r_name, 511, NULL, &r_samplerate, NULL, &r_channels); + r_name[511] = '\0'; + LL_INFOS("AppInit") << "LLAudioEngine_FMODSTUDIO::init(): r_name=\"" << r_name << "\"" << LL_ENDL; + + if (r_samplerate != 0) + latency = (int)(1000.0f * r_bufferlength * r_numbuffers / r_samplerate); + LL_INFOS("AppInit") << "LLAudioEngine_FMODSTUDIO::init(): latency=" << latency << "ms" << LL_ENDL; + + mInited = true; + + LL_INFOS("AppInit") << "LLAudioEngine_FMODSTUDIO::init(): initialization complete." << LL_ENDL; + + return true; +} + + +std::string LLAudioEngine_FMODSTUDIO::getDriverName(bool verbose) +{ + llassert_always(mSystem); + if (verbose) + { + U32 version; + if (!Check_FMOD_Error(mSystem->getVersion(&version), "FMOD::System::getVersion")) + { + return llformat("FMOD Studio %1x.%02x.%02x", version >> 16, version >> 8 & 0x000000FF, version & 0x000000FF); + } + } + return "FMOD STUDIO"; +} + + +void LLAudioEngine_FMODSTUDIO::allocateListener(void) +{ + mListenerp = (LLListener *) new LLListener_FMODSTUDIO(mSystem); + if (!mListenerp) + { + LL_WARNS("FMOD") << "Listener creation failed" << LL_ENDL; + } +} + + +void LLAudioEngine_FMODSTUDIO::shutdown() +{ + stopInternetStream(); + + LL_INFOS("FMOD") << "About to LLAudioEngine::shutdown()" << LL_ENDL; + LLAudioEngine::shutdown(); + + LL_INFOS("FMOD") << "LLAudioEngine_FMODSTUDIO::shutdown() closing FMOD Studio" << LL_ENDL; + if (mSystem) + { + mSystem->close(); + mSystem->release(); + } + LL_INFOS("FMOD") << "LLAudioEngine_FMODSTUDIO::shutdown() done closing FMOD Studio" << LL_ENDL; + + delete mListenerp; + mListenerp = NULL; +} + + +LLAudioBuffer * LLAudioEngine_FMODSTUDIO::createBuffer() +{ + return new LLAudioBufferFMODSTUDIO(mSystem); +} + + +LLAudioChannel * LLAudioEngine_FMODSTUDIO::createChannel() +{ + return new LLAudioChannelFMODSTUDIO(mSystem); +} + +bool LLAudioEngine_FMODSTUDIO::initWind() +{ + mNextWindUpdate = 0.0; + + if (!mWindDSPDesc) + { + mWindDSPDesc = new FMOD_DSP_DESCRIPTION(); + } + + if (!mWindDSP) + { + memset(mWindDSPDesc, 0, sizeof(*mWindDSPDesc)); //Set everything to zero + strncpy(mWindDSPDesc->name, "Wind Unit", sizeof(mWindDSPDesc->name)); + mWindDSPDesc->pluginsdkversion = FMOD_PLUGIN_SDK_VERSION; + mWindDSPDesc->read = &windCallback; // Assign callback - may be called from arbitrary threads + if (Check_FMOD_Error(mSystem->createDSP(mWindDSPDesc, &mWindDSP), "FMOD::createDSP")) + return false; + + if (mWindGen) + delete mWindGen; + + int frequency = 44100; + + FMOD_SPEAKERMODE mode; + if (Check_FMOD_Error(mSystem->getSoftwareFormat(&frequency, &mode, nullptr), "FMOD::System::getSoftwareFormat")) + { + cleanupWind(); + return false; + } + + mWindGen = new LLWindGen<MIXBUFFERFORMAT>((U32)frequency); + + if (Check_FMOD_Error(mWindDSP->setUserData((void*)mWindGen), "FMOD::DSP::setUserData")) + { + cleanupWind(); + return false; + } + if (Check_FMOD_Error(mWindDSP->setChannelFormat(FMOD_CHANNELMASK_STEREO, 2, mode), "FMOD::DSP::setChannelFormat")) + { + cleanupWind(); + return false; + } + } + + // *TODO: Should this guard against multiple plays? + if (Check_FMOD_Error(mSystem->playDSP(mWindDSP, nullptr, false, nullptr), "FMOD::System::playDSP")) + { + cleanupWind(); + return false; + } + return true; +} + + +void LLAudioEngine_FMODSTUDIO::cleanupWind() +{ + if (mWindDSP) + { + FMOD::ChannelGroup* master_group = NULL; + if (!Check_FMOD_Error(mSystem->getMasterChannelGroup(&master_group), "FMOD::System::getMasterChannelGroup") + && master_group) + { + master_group->removeDSP(mWindDSP); + } + mWindDSP->release(); + mWindDSP = NULL; + } + + delete mWindDSPDesc; + mWindDSPDesc = NULL; + + delete mWindGen; + mWindGen = NULL; +} + + +//----------------------------------------------------------------------- +void LLAudioEngine_FMODSTUDIO::updateWind(LLVector3 wind_vec, F32 camera_height_above_water) +{ + LLVector3 wind_pos; + F64 pitch; + F64 center_freq; + + if (!mEnableWind) + { + return; + } + + if (mWindUpdateTimer.checkExpirationAndReset(LL_WIND_UPDATE_INTERVAL)) + { + + // wind comes in as Linden coordinate (+X = forward, +Y = left, +Z = up) + // need to convert this to the conventional orientation DS3D and OpenAL use + // where +X = right, +Y = up, +Z = backwards + + wind_vec.setVec(-wind_vec.mV[1], wind_vec.mV[2], -wind_vec.mV[0]); + + // cerr << "Wind update" << endl; + + pitch = 1.0 + mapWindVecToPitch(wind_vec); + center_freq = 80.0 * pow(pitch, 2.5*(mapWindVecToGain(wind_vec) + 1.0)); + + mWindGen->mTargetFreq = (F32)center_freq; + mWindGen->mTargetGain = (F32)mapWindVecToGain(wind_vec) * mMaxWindGain; + mWindGen->mTargetPanGainR = (F32)mapWindVecToPan(wind_vec); + } +} + +//----------------------------------------------------------------------- +void LLAudioEngine_FMODSTUDIO::setInternalGain(F32 gain) +{ + if (!mInited) + { + return; + } + + gain = llclamp(gain, 0.0f, 1.0f); + + FMOD::ChannelGroup* master_group = NULL; + if (!Check_FMOD_Error(mSystem->getMasterChannelGroup(&master_group), "FMOD::System::getMasterChannelGroup") + && master_group) + { + master_group->setVolume(gain); + } + + LLStreamingAudioInterface *saimpl = getStreamingAudioImpl(); + if (saimpl) + { + // fmod likes its streaming audio channel gain re-asserted after + // master volume change. + saimpl->setGain(saimpl->getGain()); + } +} + +// +// LLAudioChannelFMODSTUDIO implementation +// + +LLAudioChannelFMODSTUDIO::LLAudioChannelFMODSTUDIO(FMOD::System *system) : LLAudioChannel(), mSystemp(system), mChannelp(NULL), mLastSamplePos(0) +{ +} + + +LLAudioChannelFMODSTUDIO::~LLAudioChannelFMODSTUDIO() +{ + cleanup(); +} + +bool LLAudioChannelFMODSTUDIO::updateBuffer() +{ + if (!mCurrentSourcep) + { + // This channel isn't associated with any source, nothing + // to be updated + return false; + } + + if (LLAudioChannel::updateBuffer()) + { + // Base class update returned true, which means that we need to actually + // set up the channel for a different buffer. + + LLAudioBufferFMODSTUDIO *bufferp = (LLAudioBufferFMODSTUDIO *)mCurrentSourcep->getCurrentBuffer(); + + // Grab the FMOD sample associated with the buffer + FMOD::Sound *soundp = bufferp->getSound(); + if (!soundp) + { + // This is bad, there should ALWAYS be a sound associated with a legit + // buffer. + LL_ERRS() << "No FMOD sound!" << LL_ENDL; + return false; + } + + + // Actually play the sound. Start it off paused so we can do all the necessary + // setup. + if (!mChannelp) + { + FMOD_RESULT result = getSystem()->playSound(soundp, NULL /*free channel?*/, true, &mChannelp); + Check_FMOD_Error(result, "FMOD::System::playSound"); + } + + // Setting up channel mChannelID + } + + // If we have a source for the channel, we need to update its gain. + if (mCurrentSourcep) + { + // SJB: warnings can spam and hurt framerate, disabling + //FMOD_RESULT result; + + mChannelp->setVolume(getSecondaryGain() * mCurrentSourcep->getGain()); + //Check_FMOD_Error(result, "FMOD::Channel::setVolume"); + + mChannelp->setMode(mCurrentSourcep->isLoop() ? FMOD_LOOP_NORMAL : FMOD_LOOP_OFF); + /*if(Check_FMOD_Error(result, "FMOD::Channel::setMode")) + { + S32 index; + mChannelp->getIndex(&index); + LL_WARNS() << "Channel " << index << "Source ID: " << mCurrentSourcep->getID() + << " at " << mCurrentSourcep->getPositionGlobal() << LL_ENDL; + }*/ + } + + return true; +} + + +void LLAudioChannelFMODSTUDIO::update3DPosition() +{ + if (!mChannelp) + { + // We're not actually a live channel (i.e., we're not playing back anything) + return; + } + + LLAudioBufferFMODSTUDIO *bufferp = (LLAudioBufferFMODSTUDIO *)mCurrentBufferp; + if (!bufferp) + { + // We don't have a buffer associated with us (should really have been picked up + // by the above if. + return; + } + + if (mCurrentSourcep->isAmbient()) + { + // Ambient sound, don't need to do any positional updates. + set3DMode(false); + } + else + { + // Localized sound. Update the position and velocity of the sound. + set3DMode(true); + + LLVector3 float_pos; + float_pos.setVec(mCurrentSourcep->getPositionGlobal()); + FMOD_RESULT result = mChannelp->set3DAttributes((FMOD_VECTOR*)float_pos.mV, (FMOD_VECTOR*)mCurrentSourcep->getVelocity().mV); + Check_FMOD_Error(result, "FMOD::Channel::set3DAttributes"); + } +} + + +void LLAudioChannelFMODSTUDIO::updateLoop() +{ + if (!mChannelp) + { + // May want to clear up the loop/sample counters. + return; + } + + // + // Hack: We keep track of whether we looped or not by seeing when the + // sample position looks like it's going backwards. Not reliable; may + // yield false negatives. + // + U32 cur_pos; + mChannelp->getPosition(&cur_pos, FMOD_TIMEUNIT_PCMBYTES); + + if (cur_pos < (U32)mLastSamplePos) + { + mLoopedThisFrame = true; + } + mLastSamplePos = cur_pos; +} + + +void LLAudioChannelFMODSTUDIO::cleanup() +{ + if (!mChannelp) + { + // Aborting cleanup with no channel handle. + return; + } + + //Cleaning up channel mChannelID + Check_FMOD_Error(mChannelp->stop(), "FMOD::Channel::stop"); + + mCurrentBufferp = NULL; + mChannelp = NULL; +} + + +void LLAudioChannelFMODSTUDIO::play() +{ + if (!mChannelp) + { + LL_WARNS() << "Playing without a channel handle, aborting" << LL_ENDL; + return; + } + + Check_FMOD_Error(mChannelp->setPaused(false), "FMOD::Channel::pause"); + + getSource()->setPlayedOnce(true); + + if (LLAudioEngine_FMODSTUDIO::mChannelGroups[getSource()->getType()]) + mChannelp->setChannelGroup(LLAudioEngine_FMODSTUDIO::mChannelGroups[getSource()->getType()]); +} + + +void LLAudioChannelFMODSTUDIO::playSynced(LLAudioChannel *channelp) +{ + LLAudioChannelFMODSTUDIO *fmod_channelp = (LLAudioChannelFMODSTUDIO*)channelp; + if (!(fmod_channelp->mChannelp && mChannelp)) + { + // Don't have channels allocated to both the master and the slave + return; + } + + U32 cur_pos; + if (Check_FMOD_Error(mChannelp->getPosition(&cur_pos, FMOD_TIMEUNIT_PCMBYTES), "Unable to retrieve current position")) + return; + + cur_pos %= mCurrentBufferp->getLength(); + + // Try to match the position of our sync master + Check_FMOD_Error(mChannelp->setPosition(cur_pos, FMOD_TIMEUNIT_PCMBYTES), "Unable to set current position"); + + // Start us playing + play(); +} + + +bool LLAudioChannelFMODSTUDIO::isPlaying() +{ + if (!mChannelp) + { + return false; + } + + bool paused, playing; + mChannelp->getPaused(&paused); + mChannelp->isPlaying(&playing); + return !paused && playing; +} + + +// +// LLAudioChannelFMODSTUDIO implementation +// + + +LLAudioBufferFMODSTUDIO::LLAudioBufferFMODSTUDIO(FMOD::System *system) : mSystemp(system), mSoundp(NULL) +{ +} + + +LLAudioBufferFMODSTUDIO::~LLAudioBufferFMODSTUDIO() +{ + if (mSoundp) + { + mSoundp->release(); + mSoundp = NULL; + } +} + + +bool LLAudioBufferFMODSTUDIO::loadWAV(const std::string& filename) +{ + // Try to open a wav file from disk. This will eventually go away, as we don't + // really want to block doing this. + if (filename.empty()) + { + // invalid filename, abort. + return false; + } + + if (!LLAPRFile::isExist(filename, NULL, LL_APR_RPB)) + { + // File not found, abort. + return false; + } + + if (mSoundp) + { + // If there's already something loaded in this buffer, clean it up. + mSoundp->release(); + mSoundp = NULL; + } + + FMOD_MODE base_mode = FMOD_LOOP_NORMAL; + FMOD_CREATESOUNDEXINFO exinfo; + memset(&exinfo, 0, sizeof(exinfo)); + exinfo.cbsize = sizeof(exinfo); + exinfo.suggestedsoundtype = FMOD_SOUND_TYPE_WAV; //Hint to speed up loading. + // Load up the wav file into an fmod sample (since 1.05 fmod studio expects everything in UTF-8) + FMOD_RESULT result = getSystem()->createSound(filename.c_str(), base_mode, &exinfo, &mSoundp); + + if (result != FMOD_OK) + { + // We failed to load the file for some reason. + LL_WARNS() << "Could not load data '" << filename << "': " << FMOD_ErrorString(result) << LL_ENDL; + + // + // If we EVER want to load wav files provided by end users, we need + // to rethink this! + // + // file is probably corrupt - remove it. + LLFile::remove(filename); + return false; + } + + // Everything went well, return true + return true; +} + + +U32 LLAudioBufferFMODSTUDIO::getLength() +{ + if (!mSoundp) + { + return 0; + } + + U32 length; + mSoundp->getLength(&length, FMOD_TIMEUNIT_PCMBYTES); + return length; +} + + +void LLAudioChannelFMODSTUDIO::set3DMode(bool use3d) +{ + FMOD_MODE current_mode; + if (mChannelp->getMode(¤t_mode) != FMOD_OK) + return; + FMOD_MODE new_mode = current_mode; + new_mode &= ~(use3d ? FMOD_2D : FMOD_3D); + new_mode |= use3d ? FMOD_3D : FMOD_2D; + + if (current_mode != new_mode) + { + mChannelp->setMode(new_mode); + } +} + +// *NOTE: This is almost certainly being called on the mixer thread, +// not the main thread. May have implications for callees or audio +// engine shutdown. + +FMOD_RESULT F_CALLBACK windCallback(FMOD_DSP_STATE *dsp_state, float *inbuffer, float *outbuffer, unsigned int length, int inchannels, int *outchannels) +{ + // inbuffer = fmod's original mixbuffer. + // outbuffer = the buffer passed from the previous DSP unit. + // length = length in samples at this mix time. + + LLWindGen<LLAudioEngine_FMODSTUDIO::MIXBUFFERFORMAT> *windgen = NULL; + FMOD::DSP *thisdsp = (FMOD::DSP *)dsp_state->instance; + + thisdsp->getUserData((void **)&windgen); + + if (windgen) + { + windgen->windGenerate((LLAudioEngine_FMODSTUDIO::MIXBUFFERFORMAT *)outbuffer, length); + } + + return FMOD_OK; +} |