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/*==============================================================================
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Music Callback Example
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Copyright (c), Firelight Technologies Pty, Ltd 2012-2025.
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This example demonstrates beat and named marker callbacks when playing music.
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### See Also ###
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* Studio::EventInstance::setCallback
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* FMOD_STUDIO_EVENT_CALLBACK_TIMELINE_MARKER
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* FMOD_STUDIO_EVENT_CALLBACK_TIMELINE_BEAT
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For information on using FMOD example code in your own programs, visit
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https://www.fmod.com/legal
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==============================================================================*/
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#include "fmod_studio.hpp"
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#include "fmod.hpp"
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#include "common.h"
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#include <vector>
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#include <string>
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static const int MAX_ENTRIES = 6;
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struct CallbackInfo
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{
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Common_Mutex mMutex;
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std::vector<std::string> mEntries;
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};
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FMOD_RESULT F_CALL markerCallback(FMOD_STUDIO_EVENT_CALLBACK_TYPE type, FMOD_STUDIO_EVENTINSTANCE* event, void *parameters);
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int FMOD_Main()
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{
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void *extraDriverData = NULL;
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Common_Init(&extraDriverData);
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FMOD::Studio::System* system = NULL;
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ERRCHECK( FMOD::Studio::System::create(&system) );
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// The example Studio project is authored for 5.1 sound, so set up the system output mode to match
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FMOD::System* coreSystem = NULL;
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ERRCHECK( system->getCoreSystem(&coreSystem) );
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ERRCHECK( coreSystem->setSoftwareFormat(0, FMOD_SPEAKERMODE_5POINT1, 0) );
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ERRCHECK( system->initialize(1024, FMOD_STUDIO_INIT_NORMAL, FMOD_INIT_NORMAL, extraDriverData) );
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FMOD::Studio::Bank* masterBank = NULL;
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ERRCHECK( system->loadBankFile(Common_MediaPath("Master.bank"), FMOD_STUDIO_LOAD_BANK_NORMAL, &masterBank) );
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FMOD::Studio::Bank* stringsBank = NULL;
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ERRCHECK( system->loadBankFile(Common_MediaPath("Master.strings.bank"), FMOD_STUDIO_LOAD_BANK_NORMAL, &stringsBank) );
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FMOD::Studio::Bank* musicBank = NULL;
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FMOD_RESULT result = system->loadBankFile(Common_MediaPath("Music.bank"), FMOD_STUDIO_LOAD_BANK_NORMAL, &musicBank);
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if (result != FMOD_OK)
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{
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// Music bank is not exported by default, you will have to export from the tool first
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Common_Fatal("Please export music.bank from the Studio tool to run this example");
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}
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FMOD::Studio::EventDescription* eventDescription = NULL;
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ERRCHECK( system->getEvent("event:/Music/Level 01", &eventDescription) );
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FMOD::Studio::EventInstance* eventInstance = NULL;
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ERRCHECK( eventDescription->createInstance(&eventInstance) );
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CallbackInfo info;
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Common_Mutex_Create(&info.mMutex);
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ERRCHECK( eventInstance->setUserData(&info) );
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ERRCHECK( eventInstance->setCallback(markerCallback,
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FMOD_STUDIO_EVENT_CALLBACK_TIMELINE_MARKER | FMOD_STUDIO_EVENT_CALLBACK_TIMELINE_BEAT |
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FMOD_STUDIO_EVENT_CALLBACK_SOUND_PLAYED | FMOD_STUDIO_EVENT_CALLBACK_SOUND_STOPPED) );
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ERRCHECK( eventInstance->start() );
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FMOD_STUDIO_PARAMETER_DESCRIPTION parameterDescription;
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ERRCHECK( eventDescription->getParameterDescriptionByName("Progression", ¶meterDescription) );
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FMOD_STUDIO_PARAMETER_ID progressionID = parameterDescription.id;
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float progression = 0.0f;
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ERRCHECK(eventInstance->setParameterByID(progressionID, progression));
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do
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{
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Common_Update();
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if (Common_BtnPress(BTN_MORE))
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{
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progression = (progression == 0.0f ? 1.0f : 0.0f);
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ERRCHECK(eventInstance->setParameterByID(progressionID, progression));
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}
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ERRCHECK( system->update() );
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int position;
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ERRCHECK( eventInstance->getTimelinePosition(&position) );
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Common_Draw("==================================================");
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Common_Draw("Music Callback Example.");
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Common_Draw("Copyright (c) Firelight Technologies 2012-2025.");
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Common_Draw("==================================================");
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Common_Draw("");
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Common_Draw("Timeline = %d", position);
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Common_Draw("");
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// Obtain lock and look at our strings
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Common_Mutex_Enter(&info.mMutex);
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for (size_t i=0; i<info.mEntries.size(); ++i)
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{
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Common_Draw(" %s\n", info.mEntries[i].c_str());
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}
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Common_Mutex_Leave(&info.mMutex);
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Common_Draw("");
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Common_Draw("Press %s to toggle progression (currently %g)", Common_BtnStr(BTN_MORE), progression);
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Common_Draw("Press %s to quit", Common_BtnStr(BTN_QUIT));
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Common_Sleep(50);
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} while (!Common_BtnPress(BTN_QUIT));
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ERRCHECK( system->release() );
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Common_Mutex_Destroy(&info.mMutex);
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Common_Close();
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return 0;
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}
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// Obtain a lock and add a string entry to our list
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void markerAddString(CallbackInfo* info, const char* format, ...)
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{
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char buf[256];
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va_list args;
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va_start(args, format);
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Common_vsnprintf(buf, 256, format, args);
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va_end(args);
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buf[255] = '\0';
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Common_Mutex_Enter(&info->mMutex);
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if (info->mEntries.size() >= MAX_ENTRIES)
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{
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info->mEntries.erase(info->mEntries.begin());
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}
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info->mEntries.push_back(std::string(buf));
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Common_Mutex_Leave(&info->mMutex);
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}
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// Callback from Studio - Remember these callbacks will occur in the Studio update thread, NOT the game thread.
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FMOD_RESULT F_CALL markerCallback(FMOD_STUDIO_EVENT_CALLBACK_TYPE type, FMOD_STUDIO_EVENTINSTANCE* event, void *parameters)
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{
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CallbackInfo* callbackInfo;
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ERRCHECK(((FMOD::Studio::EventInstance*)event)->getUserData((void**)&callbackInfo));
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if (type == FMOD_STUDIO_EVENT_CALLBACK_TIMELINE_MARKER)
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{
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FMOD_STUDIO_TIMELINE_MARKER_PROPERTIES* props = (FMOD_STUDIO_TIMELINE_MARKER_PROPERTIES*)parameters;
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markerAddString(callbackInfo, "Named marker '%s'", props->name);
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}
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else if (type == FMOD_STUDIO_EVENT_CALLBACK_TIMELINE_BEAT)
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{
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FMOD_STUDIO_TIMELINE_BEAT_PROPERTIES* props = (FMOD_STUDIO_TIMELINE_BEAT_PROPERTIES*)parameters;
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markerAddString(callbackInfo, "beat %d, bar %d (tempo %.1f %d:%d)", props->beat, props->bar, props->tempo, props->timesignatureupper, props->timesignaturelower);
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}
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if (type == FMOD_STUDIO_EVENT_CALLBACK_SOUND_PLAYED || type == FMOD_STUDIO_EVENT_CALLBACK_SOUND_STOPPED)
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{
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FMOD::Sound* sound = (FMOD::Sound*)parameters;
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char name[256];
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ERRCHECK(sound->getName(name, 256));
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unsigned int len;
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ERRCHECK(sound->getLength(&len, FMOD_TIMEUNIT_MS));
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markerAddString(callbackInfo, "Sound '%s' (length %.3f) %s",
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name, (float)len/1000.0f,
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type == FMOD_STUDIO_EVENT_CALLBACK_SOUND_PLAYED ? "Started" : "Stopped");
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}
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return FMOD_OK;
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}
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