int FMOD_Main()
{
FMOD::Channel *channel = NULL;
unsigned int samplesRecorded = 0;
unsigned int samplesPlayed = 0;
bool dspEnabled = false;
void *extraDriverData = NULL;
Common_Init(&extraDriverData);
/*
Create a System object and initialize.
*/
FMOD::System *system = NULL;
FMOD_RESULT result = FMOD::System_Create(&system);
ERRCHECK(result);
unsigned int version = 0;
result = system->getVersion(&version);
ERRCHECK(result);
if (version < FMOD_VERSION)
{
Common_Fatal("FMOD lib version %08x doesn't match header version %08x", version, FMOD_VERSION);
}
result = system->init(100, FMOD_INIT_NORMAL, extraDriverData);
ERRCHECK(result);
int numDrivers = 0;
result = system->getRecordNumDrivers(NULL, &numDrivers);
ERRCHECK(result);
if (numDrivers == 0)
{
Common_Fatal("No recording devices found/plugged in! Aborting.");
}
/*
Determine latency in samples.
*/
int nativeRate = 0;
int nativeChannels = 0;
result = system->getRecordDriverInfo(DEVICE_INDEX, NULL, 0, NULL, &nativeRate, NULL, &nativeChannels, NULL);
ERRCHECK(result);
unsigned int driftThreshold = (nativeRate * DRIFT_MS) / 1000; /* The point where we start compensating for drift */
unsigned int desiredLatency = (nativeRate * LATENCY_MS) / 1000; /* User specified latency */
unsigned int adjustedLatency = desiredLatency; /* User specified latency adjusted for driver update granularity */
int actualLatency = desiredLatency; /* Latency measured once playback begins (smoothened for jitter) */
/*
Create user sound to record into, then start recording.
*/
FMOD_CREATESOUNDEXINFO exinfo = {0};
exinfo.cbsize = sizeof(FMOD_CREATESOUNDEXINFO);
exinfo.numchannels = nativeChannels;
exinfo.format = FMOD_SOUND_FORMAT_PCM16;
exinfo.defaultfrequency = nativeRate;
exinfo.length = nativeRate * sizeof(short) * nativeChannels; /* 1 second buffer, size here doesn't change latency */
FMOD::Sound *sound = NULL;
result = system->createSound(0, FMOD_LOOP_NORMAL | FMOD_OPENUSER, &exinfo, &sound);
ERRCHECK(result);
result = system->recordStart(DEVICE_INDEX, sound, true);
ERRCHECK(result);
unsigned int soundLength = 0;
result = sound->getLength(&soundLength, FMOD_TIMEUNIT_PCM);
ERRCHECK(result);
/*
Main loop
*/
do
{
Common_Update();
/*
Add a DSP effect -- just for fun
*/
if (Common_BtnPress(BTN_ACTION1))
{
FMOD_REVERB_PROPERTIES propOn = FMOD_PRESET_CONCERTHALL;
FMOD_REVERB_PROPERTIES propOff = FMOD_PRESET_OFF;
dspEnabled = !dspEnabled;
result = system->setReverbProperties(0, dspEnabled ? &propOn : &propOff);
ERRCHECK(result);
}
result = system->update();
ERRCHECK(result);
/*
Determine how much has been recorded since we last checked
*/
unsigned int recordPos = 0;
result = system->getRecordPosition(DEVICE_INDEX, &recordPos);
if (result != FMOD_ERR_RECORD_DISCONNECTED)
{
ERRCHECK(result);
}
static unsigned int lastRecordPos = 0;
unsigned int recordDelta = (recordPos >= lastRecordPos) ? (recordPos - lastRecordPos) : (recordPos + soundLength - lastRecordPos);
lastRecordPos = recordPos;
samplesRecorded += recordDelta;
static unsigned int minRecordDelta = (unsigned int)-1;
if (recordDelta && (recordDelta < minRecordDelta))
{
minRecordDelta = recordDelta; /* Smallest driver granularity seen so far */
adjustedLatency = (recordDelta <= desiredLatency) ? desiredLatency : recordDelta; /* Adjust our latency if driver granularity is high */
}
/*
Delay playback until our desired latency is reached.
*/
if (!channel && samplesRecorded >= adjustedLatency)
{
result = system->playSound(sound, 0, false, &channel);
ERRCHECK(result);
}
if (channel)
{
/*
Stop playback if recording stops.
*/
bool isRecording = false;
result = system->isRecording(DEVICE_INDEX, &isRecording);
if (result != FMOD_ERR_RECORD_DISCONNECTED)
{
ERRCHECK(result);
}
if (!isRecording)
{
result = channel->setPaused(true);
ERRCHECK(result);
}
/*
Determine how much has been played since we last checked.
*/
unsigned int playPos = 0;
result = channel->getPosition(&playPos, FMOD_TIMEUNIT_PCM);
ERRCHECK(result);
static unsigned int lastPlayPos = 0;
unsigned int playDelta = (playPos >= lastPlayPos) ? (playPos - lastPlayPos) : (playPos + soundLength - lastPlayPos);
lastPlayPos = playPos;
samplesPlayed += playDelta;
/*
Compensate for any drift.
*/
int latency = samplesRecorded - samplesPlayed;
actualLatency = (0.97f * actualLatency) + (0.03f * latency);
int playbackRate = nativeRate;
if (actualLatency < (adjustedLatency - driftThreshold))
{
/* Play position is catching up to the record position, slow playback down by 2% */
playbackRate = nativeRate - (nativeRate / 50);
}
else if (actualLatency > (adjustedLatency + driftThreshold))
{
/* Play position is falling behind the record position, speed playback up by 2% */
playbackRate = nativeRate + (nativeRate / 50);
}
channel->setFrequency((float)playbackRate);
ERRCHECK(result);
}
Common_Draw("==================================================");
Common_Draw("Record Example.");
Common_Draw("Copyright (c) Firelight Technologies 2004-2015.");
Common_Draw("==================================================");
Common_Draw("");
Common_Draw("Adjust LATENCY define to compensate for stuttering");
Common_Draw("Current value is %dms", LATENCY_MS);
Common_Draw("");
Common_Draw("Press %s to %s DSP effect", Common_BtnStr(BTN_ACTION1), dspEnabled ? "disable" : "enable");
Common_Draw("Press %s to quit", Common_BtnStr(BTN_QUIT));
Common_Draw("");
Common_Draw("Adjusted latency: %4d (%dms)", adjustedLatency, adjustedLatency * 1000 / nativeRate);
Common_Draw("Actual latency: %4d (%dms)", actualLatency, actualLatency * 1000 / nativeRate);
Common_Draw("");
Common_Draw("Recorded: %5d (%ds)", samplesRecorded, samplesRecorded / nativeRate);
Common_Draw("Played: %5d (%ds)", samplesPlayed, samplesPlayed / nativeRate);
Common_Sleep(10);
} while (!Common_BtnPress(BTN_QUIT));
/*
Shut down
*/
result = sound->release();
ERRCHECK(result);
result = system->release();
ERRCHECK(result);
Common_Close();
return 0;
}
/*==============================================================================
Record example
Copyright (c), Firelight Technologies Pty, Ltd 2004-2014.
This example shows how to record continuously, and play back the same data as
closely to the record cursor as possible without stuttering.
==============================================================================*/
#include "fmod.hpp"
#include "common.h"
#define LATENCY_MS (50) /* Some devices will require higher latency to avoid glitches */
int FMOD_Main()
{
FMOD::System *system = 0;
FMOD::Sound *sound = 0;
FMOD::Channel *channel = 0;
FMOD_RESULT result = FMOD_OK;
unsigned int version = 0;
unsigned int soundlength = 0;
bool dspenabled = false;
void *extradriverdata = 0;
unsigned int recordpos = 0;
unsigned int recorddelta = 0;
unsigned int minrecorddelta = (unsigned int)-1;
unsigned int lastrecordpos = 0;
unsigned int samplesrecorded = 0;
unsigned int playpos = 0;
float smootheddelta = 0;
FMOD_CREATESOUNDEXINFO exinfo;
Common_Init(&extradriverdata);
/*
Create a System object and initialize.
*/
result = FMOD::System_Create(&system);
ERRCHECK(result);
result = system->getVersion(&version);
ERRCHECK(result);
if (version < FMOD_VERSION)
{
Common_Fatal("FMOD lib version %08x doesn't match header version %08x", version, FMOD_VERSION);
}
result = system->init(100, FMOD_INIT_NORMAL, extradriverdata);
ERRCHECK(result);
int recordrate;
int recordchannels;
result = system->getRecordDriverInfo(0, NULL, NULL, 0, 0, &recordrate, 0, &recordchannels);
ERRCHECK(result);
unsigned int adjustedlatency = (recordrate * LATENCY_MS) / 1000;
unsigned int driftthreshold = adjustedlatency / 2;
/*
Create user sound to record into.
*/
memset(&exinfo, 0, sizeof(FMOD_CREATESOUNDEXINFO));
exinfo.cbsize = sizeof(FMOD_CREATESOUNDEXINFO);
exinfo.numchannels = recordchannels;
exinfo.format = FMOD_SOUND_FORMAT_PCM16;
exinfo.defaultfrequency = recordrate;
exinfo.length = exinfo.defaultfrequency * sizeof(short) * exinfo.numchannels * 5; /* 5 second buffer, doesnt really matter how big this is, but not too small of course. */
result = system->createSound(0, FMOD_LOOP_NORMAL | FMOD_OPENUSER, &exinfo, &sound);
ERRCHECK(result);
result = system->recordStart(0, sound, true);
ERRCHECK(result);
result = sound->getLength(&soundlength, FMOD_TIMEUNIT_PCM);
ERRCHECK(result);
/*
Main loop
*/
do
{
Common_Update();
if (Common_BtnPress(BTN_ACTION1))
{
FMOD_REVERB_PROPERTIES propon = FMOD_PRESET_CONCERTHALL;
FMOD_REVERB_PROPERTIES propoff = FMOD_PRESET_OFF;
dspenabled = !dspenabled;
result = system->setReverbProperties(0, dspenabled ? &propon : &propoff);
ERRCHECK(result);
}
result = system->update();
ERRCHECK(result);
system->getRecordPosition(0, &recordpos);
ERRCHECK(result);
recorddelta = (recordpos >= lastrecordpos) ? (recordpos - lastrecordpos) : (recordpos + soundlength - lastrecordpos);
lastrecordpos = recordpos;
samplesrecorded += recorddelta;
if (samplesrecorded >= adjustedlatency && !channel)
{
result = system->playSound(sound, 0, false, &channel);
ERRCHECK(result);
}
if (channel && recorddelta)
{
/*
If the record driver steps the position of the record cursor in larger increments than the user
defined latency value, then we should increase our latency value to match.
*/
if (recorddelta < minrecorddelta)
{
minrecorddelta = recorddelta;
if (adjustedlatency < recorddelta)
{
adjustedlatency = recorddelta;
}
}
result = channel->getPosition(&playpos, FMOD_TIMEUNIT_PCM);
ERRCHECK(result);
/*
Smooth total
*/
{
const float dampratio = 0.97f;
static float total = 0;
total *= dampratio;
total += (recordpos >= playpos) ? (recordpos - playpos) : (recordpos + soundlength - playpos);
smootheddelta = total * (1.0f - dampratio);
}
if (smootheddelta < (adjustedlatency - driftthreshold) || smootheddelta > soundlength / 2) /* If play cursor is catching up to record (or passed it), slow playback down */
{
channel->setFrequency(recordrate - (recordrate / 50)); /* Decrease speed by 2% */
}
else if (smootheddelta > (adjustedlatency + driftthreshold)) /* If play cursor is falling too far behind record, speed playback up */
{
channel->setFrequency(recordrate + (recordrate / 50)); /* Increase speed by 2% */
}
else
{
channel->setFrequency(recordrate); /* Otherwise set to normal rate */
}
}
Common_Draw("==================================================");
Common_Draw("Record Example.");
Common_Draw("Copyright (c) Firelight Technologies 2004-2014.");
Common_Draw("==================================================");
Common_Draw("");
Common_Draw("Adjust LATENCY define to compensate for stuttering");
Common_Draw("");
Common_Draw("Press %s to %s DSP effect", Common_BtnStr(BTN_ACTION1), dspenabled ? "disable" : "enable");
Common_Draw("Press %s to quit", Common_BtnStr(BTN_QUIT));
Common_Draw("");
Common_Draw("Default playback latency: %4d (%dms)", (recordrate * LATENCY_MS) / 1000, LATENCY_MS);
Common_Draw("Current playback latency: %4d (%dms)", (int)smootheddelta, (int)smootheddelta * 1000 / recordrate);
Common_Draw("Record position: %6d", recordpos);
Common_Draw("Play Position: %6d", playpos);
Common_Sleep(10);
} while (!Common_BtnPress(BTN_QUIT));
/*
Shut down
*/
result = sound->release();
ERRCHECK(result);
result = system->release();
ERRCHECK(result);
Common_Close();
return 0;
}
int main(int argc, char *argv[])
{
FMOD::System *system = 0;
FMOD::Sound *sound = 0;
FMOD::Channel *channel = 0;
FMOD::DSP *dsp = 0;
FMOD_RESULT result;
FMOD_CREATESOUNDEXINFO exinfo;
FMOD_SPEAKERMODE speakermode;
FMOD_CAPS caps;
int key, numdrivers;
unsigned int version;
unsigned int datalength = 0, soundlength;
char name[256];
unsigned int adjustedlatency;
/*
Create a System object and initialize.
*/
result = FMOD::System_Create(&system);
ERRCHECK(result);
result = system->getVersion(&version);
ERRCHECK(result);
if (version < FMOD_VERSION)
{
printf("Error! You are using an old version of FMOD %08x. This program requires %08x\n", version, FMOD_VERSION);
return 0;
}
/*
System initialization (recommended startup sequence)
*/
result = system->getNumDrivers(&numdrivers);
ERRCHECK(result);
if (numdrivers == 0)
{
result = system->setOutput(FMOD_OUTPUTTYPE_NOSOUND);
ERRCHECK(result);
}
else
{
result = system->getDriverCaps(0, &caps, 0, &speakermode);
ERRCHECK(result);
result = system->setSpeakerMode(speakermode); /* Set the user selected speaker mode. */
ERRCHECK(result);
if (caps & FMOD_CAPS_HARDWARE_EMULATED) /* The user has the 'Acceleration' slider set to off! This is really bad for latency!. */
{ /* You might want to warn the user about this. */
result = system->setDSPBufferSize(1024, 10);
ERRCHECK(result);
}
#ifdef LOWLATENCY
else
{
result = system->setDSPBufferSize(256, 4);
}
#endif
result = system->getDriverInfo(0, name, 256, 0);
ERRCHECK(result);
if (strstr(name, "SigmaTel")) /* Sigmatel sound devices crackle for some reason if the format is PCM 16bit. PCM floating point output seems to solve it. */
{
result = system->setSoftwareFormat(48000, FMOD_SOUND_FORMAT_PCMFLOAT, 0,0, FMOD_DSP_RESAMPLER_LINEAR);
ERRCHECK(result);
}
}
result = system->init(100, FMOD_INIT_NORMAL, 0);
if (result == FMOD_ERR_OUTPUT_CREATEBUFFER) /* Ok, the speaker mode selected isn't supported by this soundcard. Switch it back to stereo... */
{
result = system->setSpeakerMode(FMOD_SPEAKERMODE_STEREO);
ERRCHECK(result);
result = system->init(100, FMOD_INIT_NORMAL, 0);/* ... and re-init. */
ERRCHECK(result);
}
/*
System initialization complete (recommended startup sequence)
*/
/*
Create user sound to record into. Set it to loop for playback.
*/
memset(&exinfo, 0, sizeof(FMOD_CREATESOUNDEXINFO));
exinfo.cbsize = sizeof(FMOD_CREATESOUNDEXINFO);
exinfo.numchannels = 1;
exinfo.format = FMOD_SOUND_FORMAT_PCM16;
exinfo.defaultfrequency = RECORDRATE;
exinfo.length = exinfo.defaultfrequency * sizeof(short) * exinfo.numchannels * 5; /* 5 second buffer, doesnt really matter how big this is, but not too small of course. */
result = system->createSound(0, FMOD_2D | FMOD_SOFTWARE | FMOD_LOOP_NORMAL | FMOD_OPENUSER, &exinfo, &sound);
ERRCHECK(result);
printf("========================================================================\n");
printf("Record with realtime playback example.\n");
printf("Copyright (c) Firelight Technologies 2004-2014.\n");
printf("\n");
printf("Try #define LOWLATENCY to reduce latency for more modern machines!\n");
printf("========================================================================\n");
printf("\n");
printf("Press a key to start recording. Playback will start %d samples (%d ms) later.\n", LATENCY, LATENCY * 1000 / RECORDRATE);
printf("\n");
_getch();
printf("Press 'E' to toggle an effect on/off.\n");
printf("Press 'Esc' to quit\n");
printf("\n");
result = system->recordStart(0, sound, true);
ERRCHECK(result);
result = sound->getLength(&soundlength, FMOD_TIMEUNIT_PCM);
ERRCHECK(result);
/*
Create a DSP effect to play with.
*/
result = system->createDSPByType(FMOD_DSP_TYPE_FLANGE, &dsp);
ERRCHECK(result);
result = dsp->setParameter(FMOD_DSP_FLANGE_RATE, 4.0f);
ERRCHECK(result);
result = dsp->setBypass(true);
ERRCHECK(result);
adjustedlatency = LATENCY; /* This might change depending on record block size. */
/*
Main loop.
*/
do
{
static unsigned int lastrecordpos = 0, samplesrecorded = 0;
unsigned int recordpos = 0, recorddelta;
key = 0;
if (_kbhit())
{
key = _getch();
}
if (key == 'e' || key == 'E')
{
bool bypass;
dsp->getBypass(&bypass);
dsp->setBypass(!bypass);
if (bypass)
{
FMOD_REVERB_PROPERTIES prop = FMOD_PRESET_CONCERTHALL;
system->setReverbProperties(&prop);
}
else
{
FMOD_REVERB_PROPERTIES prop = FMOD_PRESET_OFF;
system->setReverbProperties(&prop);
}
printf("\n\n *** TURN DSP EFFECT %s ** \n\n", bypass ? "ON" : "OFF");
}
system->getRecordPosition(0, &recordpos);
ERRCHECK(result);
recorddelta = recordpos >= lastrecordpos ? recordpos - lastrecordpos : recordpos + soundlength - lastrecordpos;
samplesrecorded += recorddelta;
if (samplesrecorded >= adjustedlatency && !channel)
{
result = system->playSound(FMOD_CHANNEL_FREE, sound, 0, &channel);
ERRCHECK(result);
result = channel->addDSP(dsp, 0);
ERRCHECK(result);
}
if (channel && recorddelta)
{
unsigned int playrecorddelta;
unsigned int playpos = 0;
int adjusting = 0;
float smootheddelta;
float dampratio = 0.97f;
static unsigned int minrecorddelta = (unsigned int)-1;
/*
If the record driver steps the position of the record cursor in larger increments than the user defined latency value, then we should
increase our latency value to match.
*/
if (recorddelta < minrecorddelta)
{
minrecorddelta = recorddelta;
if (adjustedlatency < recorddelta)
{
adjustedlatency = recorddelta;
}
}
channel->getPosition(&playpos, FMOD_TIMEUNIT_PCM);
playrecorddelta = recordpos >= playpos ? recordpos - playpos : recordpos + soundlength - playpos;
/*
Smooth total
*/
{
static float total = 0;
total = total * dampratio;
total += playrecorddelta;
smootheddelta = total * (1.0f - dampratio);
}
if (smootheddelta < adjustedlatency - DRIFTTHRESHOLD || smootheddelta > soundlength / 2) /* if play cursor is catching up to record (or passed it), slow playback down */
{
channel->setFrequency(RECORDRATE - (RECORDRATE / 50)); /* Decrease speed by 2% */
adjusting = 1;
}
else if (smootheddelta > adjustedlatency + DRIFTTHRESHOLD) /* if play cursor is falling too far behind record, speed playback up */
{
channel->setFrequency(RECORDRATE + (RECORDRATE / 50)); /* Increase speed by 2% */
adjusting = 2;
}
else
{
channel->setFrequency(RECORDRATE); /* Otherwise set to normal rate */
adjusting = 0;
}
printf("REC %5d (REC delta %5d) : PLAY %5d, PLAY/REC diff %5d %s\r", recordpos, recorddelta, playpos, (int)smootheddelta, adjusting == 1 ? "DECREASE SPEED" : adjusting == 2 ? "INCREASE SPEED" : " ");
}
lastrecordpos = recordpos;
system->update();
Sleep(10);
} while (key != 27);
printf("\n");
/*
Shut down
*/
result = sound->release();
ERRCHECK(result);
result = system->release();
ERRCHECK(result);
return 0;
}
