void ofApp::audioOut(float* output, int bufferSize, int nChannels) {
float sum = 0;
for (int i = 0; i < bufferSize; i++){
output[i * nChannels] = floatBuffer[bufferPosition * nChannels];
output[i * nChannels + 1] = floatBuffer[bufferPosition * nChannels + 1];
curBuffer[i * nChannels] = output[i * nChannels] * (1<<15);
curBuffer[i * nChannels + 1] = output[i * nChannels + 1] * (1<<15);
if(i % 2 == 0) { // drop 96khz to 48khz
bufferPosition++;
if(bufferPosition == bufferFrames) {
bufferPosition = 0;
relativePosition = 0;
exportXml();
}
}
}
timecoder_submit(&timecoder, &curBuffer[0], bufferSize);
relativeTtm[ttmPosition] = getRelative();
absoluteTtm[ttmPosition] = getAbsolute();
if(exporting) {
wholeBuffer.push_back(absoluteTtm[ttmPosition] );
}
pitchTtm[ttmPosition] = getPitch();
ttmPosition++;
if(ttmPosition == relativeTtm.size()) {
ttmPosition = 0;
}
}
static int capture(struct device_t *dv)
{
int r;
struct alsa_t *alsa = (struct alsa_t*)dv->local;
r = snd_pcm_readi(alsa->capture.pcm, alsa->capture.buf,
alsa->capture.period);
if (r < 0)
return r;
if (r < alsa->capture.period) {
fprintf(stderr, "alsa: capture underrun %d/%ld.\n",
r, alsa->capture.period);
}
if (dv->timecoder)
timecoder_submit(dv->timecoder, alsa->capture.buf, r);
return 0;
}
static void process_deck(struct device_t *dv, jack_nframes_t nframes)
{
int n;
jack_default_audio_sample_t *in[DEVICE_CHANNELS], *out[DEVICE_CHANNELS];
jack_nframes_t remain;
struct jack_t *jack = (struct jack_t*)dv->local;
for (n = 0; n < DEVICE_CHANNELS; n++) {
in[n] = jack_port_get_buffer(jack->input_port[n], nframes);
assert(in[n] != NULL);
out[n] = jack_port_get_buffer(jack->output_port[n], nframes);
assert(out[n] != NULL);
}
/* For large values of nframes, communicate with the timecoder and
* player in smaller blocks */
remain = nframes;
while (remain > 0) {
signed short buf[MAX_BLOCK * DEVICE_CHANNELS];
jack_nframes_t block;
if (remain < MAX_BLOCK)
block = remain;
else
block = MAX_BLOCK;
/* Timecode input */
interleave(buf, in, block);
if (dv->timecoder)
timecoder_submit(dv->timecoder, buf, block);
/* Audio output -- handle in the same loop for finer granularity */
player_collect(dv->player, buf, block, rate);
uninterleave(out, buf, block);
remain -= block;
}
}
void ofxXwax::update(float* input) {
// convert from -1 to 1 to a 16-byte signed short integer
for (int i = 0; i < bufferSize * nChannels; i++) {
shortBuffer[i] = input[i] * (1<<15);
}
timecoder_submit(&timecoder, &shortBuffer[0], bufferSize);
float when;
float curPosition = timecoder_get_position(&timecoder, &when);
pitch = timecoder_get_pitch(&timecoder);
velocity = (msPerSecond * bufferSize / sampleRate) * pitch;
relativePosition += velocity;
if(curPosition == invalidPosition) {
absoluteValid = false;
absolutePosition += velocity;
} else {
absoluteValid = true;
absolutePosition = curPosition;
}
}
void VinylControlXwax::analyzeSamples(CSAMPLE* pSamples, size_t nFrames) {
ScopedTimer t("VinylControlXwax::analyzeSamples");
CSAMPLE gain = m_pVinylControlInputGain->get();
const int kChannels = 2;
// We only support amplifying with the VC pre-amp.
if (gain < 1.0f) {
gain = 1.0f;
}
size_t samplesSize = nFrames * kChannels;
if (samplesSize > m_workBufferSize) {
delete [] m_pWorkBuffer;
m_pWorkBuffer = new short[samplesSize];
m_workBufferSize = samplesSize;
}
// Convert CSAMPLE samples to shorts, preventing overflow.
for (int i = 0; i < static_cast<int>(samplesSize); ++i) {
CSAMPLE sample = pSamples[i] * gain * SAMPLE_MAX;
if (sample > SAMPLE_MAX) {
m_pWorkBuffer[i] = SAMPLE_MAX;
} else if (sample < SAMPLE_MIN) {
m_pWorkBuffer[i] = SAMPLE_MIN;
} else {
m_pWorkBuffer[i] = static_cast<short>(sample);
}
}
// Submit the samples to the xwax timecode processor. The size argument is
// in stereo frames.
timecoder_submit(&timecoder, m_pWorkBuffer, nFrames);
bool bHaveSignal = fabs(pSamples[0]) + fabs(pSamples[1]) > kMinSignal;
//qDebug() << "signal?" << bHaveSignal;
//TODO: Move all these config object get*() calls to an "updatePrefs()" function,
// and make that get called when any options get changed in the preferences dialog, rather than
// polling everytime we get a buffer.
// Check if vinyl control is enabled...
m_bIsEnabled = enabled == NULL ? false : checkEnabled(m_bIsEnabled, enabled->get());
if(bHaveSignal) {
// Always analyze the input samples
m_iPosition = timecoder_get_position(&timecoder, NULL);
//Notify the UI if the timecode quality is good
establishQuality(m_iPosition != -1);
}
//are we even playing and enabled at all?
if (!m_bIsEnabled)
return;
double dVinylPitch = timecoder_get_pitch(&timecoder);
// Has a new track been loaded? Currently we use track duration which is
// integer seconds in the song. However, for calculations we need the
// higher-accuracy duration found by dividing the track samples by the
// samplerate.
// TODO(XXX): we should really sync on all track changes
// TODO(rryan): Should we calculate the true duration to check if it
// changed? It's just an extra division by trackSampleRate.
double duration_inaccurate = duration->get();
if (duration_inaccurate != m_dOldDurationInaccurate) {
m_bForceResync = true;
m_bTrackSelectMode = false; //just in case
m_dOldDurationInaccurate = duration_inaccurate;
m_dOldDuration = trackSamples->get() / 2 / trackSampleRate->get();
// we were at record end, so turn it off and restore mode
if(m_bAtRecordEnd) {
disableRecordEndMode();
if (m_iOldVCMode == MIXXX_VCMODE_CONSTANT)
m_iVCMode = MIXXX_VCMODE_RELATIVE;
else
m_iVCMode = m_iOldVCMode;
}
}
// make sure m_dVinylPosition only has good values
if (m_iPosition != -1) {
m_dVinylPosition = static_cast<double>(m_iPosition) / 1000.0 - m_iLeadInTime;
}
// Initialize drift control to zero in case we don't get any position data
// to calculate it with.
double dDriftControl = 0.0;
// Get the playback position in the file in seconds.
double filePosition = playPos->get() * m_dOldDuration;
int reportedMode = mode->get();
bool reportedPlayButton = playButton->get();
if (m_iVCMode != reportedMode) {
//if we are playing, don't allow change
//to absolute mode (would cause sudden track skip)
if (reportedPlayButton && reportedMode == MIXXX_VCMODE_ABSOLUTE) {
m_iVCMode = MIXXX_VCMODE_RELATIVE;
mode->slotSet((double)m_iVCMode);
} else {
// go ahead and switch
m_iVCMode = reportedMode;
if (reportedMode == MIXXX_VCMODE_ABSOLUTE) {
m_bForceResync = true;
}
}
//if we are out of error mode...
if (vinylStatus->get() == VINYL_STATUS_ERROR &&
m_iVCMode == MIXXX_VCMODE_RELATIVE) {
vinylStatus->slotSet(VINYL_STATUS_OK);
}
}
//if looping has been enabled, don't allow absolute mode
if (loopEnabled->get() && m_iVCMode == MIXXX_VCMODE_ABSOLUTE) {
m_iVCMode = MIXXX_VCMODE_RELATIVE;
mode->slotSet((double)m_iVCMode);
}
// Don't allow cueing mode to be enabled in absolute mode.
if (m_iVCMode == MIXXX_VCMODE_ABSOLUTE &&
cueing->get() != MIXXX_RELATIVE_CUE_OFF) {
cueing->set(MIXXX_RELATIVE_CUE_OFF);
}
//are we newly playing near the end of the record? (in absolute mode, this happens
//when the filepos is past safe (more accurate),
//but it can also happen in relative mode if the vinylpos is nearing the end
//If so, change to constant mode so DJ can move the needle safely
if (!m_bAtRecordEnd && reportedPlayButton) {
if (m_iVCMode == MIXXX_VCMODE_ABSOLUTE &&
(filePosition + m_iLeadInTime) * 1000.0 > m_uiSafeZone &&
!m_bForceResync) {
// corner case: we are waiting for resync so don't enable just yet
enableRecordEndMode();
} else if (m_iVCMode != MIXXX_VCMODE_ABSOLUTE &&
m_iPosition != -1 &&
m_iPosition > static_cast<int>(m_uiSafeZone)) {
enableRecordEndMode();
}
}
if (m_bAtRecordEnd) {
//if m_bAtRecordEnd was true, maybe it no longer applies:
if (!reportedPlayButton) {
//if we turned off play button, also disable
disableRecordEndMode();
} else if (m_iPosition != -1 &&
m_iPosition <= static_cast<int>(m_uiSafeZone) &&
m_dVinylPosition > 0 &&
checkSteadyPitch(dVinylPitch, filePosition) > 0.5) {
//if good position, and safe, and not in leadin, and steady,
//disable
disableRecordEndMode();
}
if (m_bAtRecordEnd) {
//ok, it's still valid, blink
if ((reportedPlayButton && (int)(filePosition * 2.0) % 2) ||
(!reportedPlayButton && (int)(m_iPosition / 500.0) % 2))
vinylStatus->slotSet(VINYL_STATUS_WARNING);
else
vinylStatus->slotSet(VINYL_STATUS_DISABLED);
}
}
//check here for position > safe, and if no record end mode,
//then trigger track selection mode. just pass position to it
//and ignore pitch
if (!m_bAtRecordEnd) {
if (m_iPosition != -1 && m_iPosition > static_cast<int>(m_uiSafeZone)) {
//only enable if pitch is steady, though. Heavy scratching can
//produce crazy results and trigger this mode
if (m_bTrackSelectMode || checkSteadyPitch(dVinylPitch, filePosition) > 0.1) {
//until I can figure out how to detect "track 2" on serato CD,
//don't try track selection
if (!m_bCDControl) {
if (!m_bTrackSelectMode) {
qDebug() << "position greater than safe, select mode" << m_iPosition << m_uiSafeZone;
m_bTrackSelectMode = true;
togglePlayButton(false);
resetSteadyPitch(0.0, 0.0);
controlScratch->slotSet(0.0);
}
doTrackSelection(true, dVinylPitch, m_iPosition);
}
//hm I wonder if track will keep playing while this happens?
//not sure what we want to do here... probably enforce
//stopped deck.
//but if constant mode... nah, force stop.
return;
}
//if it's not steady yet we process as normal
} else {
//so we're not unsafe.... but
//if no position, but we were in select mode, do select mode
if (m_iPosition == -1 && m_bTrackSelectMode) {
//qDebug() << "no position, but were in select mode";
doTrackSelection(false, dVinylPitch, m_iPosition);
//again, force stop?
return;
} else if (m_bTrackSelectMode) {
//qDebug() << "discontinuing select mode, selecting track";
if (m_pControlTrackLoader == NULL)
m_pControlTrackLoader = new ControlObjectThread(m_group,"LoadSelectedTrack");
if (!m_pControlTrackLoader) {
qDebug() << "ERROR: couldn't get track loading object?";
} else {
m_pControlTrackLoader->slotSet(1.0);
m_pControlTrackLoader->slotSet(0.0); //I think I have to do this...
}
//if position is known and safe then no track select mode
m_bTrackSelectMode = false;
}
}
}
if (m_iVCMode == MIXXX_VCMODE_CONSTANT) {
//when we enabled constant mode we set the rate slider
//now we just either set scratch val to 0 (stops playback)
//or 1 (plays back at that rate)
double newScratch = reportedPlayButton ? rateDir->get() *
(rateSlider->get() * rateRange->get()) + 1.0 : 0.0;
controlScratch->slotSet(newScratch);
//is there any reason we'd need to do anything else?
return;
}
//CONSTANT MODE NO LONGER APPLIES...
// When there's a timecode signal available
// This is set when we analyze samples (no need for lock I think)
if(bHaveSignal) {
//POSITION: MAYBE PITCH: YES
//We have pitch, but not position. so okay signal but not great (scratching / cueing?)
//qDebug() << "Pitch" << dVinylPitch;
if (m_iPosition != -1) {
//POSITION: YES PITCH: YES
//add a value to the pitch ring (for averaging / smoothing the pitch)
//qDebug() << fabs(((m_dVinylPosition - m_dVinylPositionOld) * (dVinylPitch / fabs(dVinylPitch))));
//save the absolute amount of drift for when we need to estimate vinyl position
m_dDriftAmt = m_dVinylPosition - filePosition;
//qDebug() << "drift" << m_dDriftAmt;
if (m_bForceResync) {
//if forceresync was set but we're no longer absolute,
//it no longer applies
//if we're in relative mode then we'll do a sync
//because it might select a cue
if (m_iVCMode == MIXXX_VCMODE_ABSOLUTE ||
(m_iVCMode == MIXXX_VCMODE_RELATIVE && cueing->get())) {
syncPosition();
resetSteadyPitch(dVinylPitch, m_dVinylPosition);
}
m_bForceResync = false;
} else if (fabs(m_dVinylPosition - filePosition) > 0.1 &&
m_dVinylPosition < -2.0) {
//At first I thought it was a bug to resync to leadin in relative mode,
//but after using it that way it's actually pretty convenient.
//qDebug() << "Vinyl leadin";
syncPosition();
resetSteadyPitch(dVinylPitch, m_dVinylPosition);
if (uiUpdateTime(filePosition))
rateSlider->slotSet(rateDir->get() * (fabs(dVinylPitch) - 1.0) / rateRange->get());
} else if (m_iVCMode == MIXXX_VCMODE_ABSOLUTE &&
(fabs(m_dVinylPosition - m_dVinylPositionOld) >= 5.0)) {
//If the position from the timecode is more than a few seconds off, resync the position.
//qDebug() << "resync position (>15.0 sec)";
//qDebug() << m_dVinylPosition << m_dVinylPositionOld << m_dVinylPosition - m_dVinylPositionOld;
syncPosition();
resetSteadyPitch(dVinylPitch, m_dVinylPosition);
} else if (m_iVCMode == MIXXX_VCMODE_ABSOLUTE && m_bCDControl &&
fabs(m_dVinylPosition - m_dVinylPositionOld) >= 0.1) {
//qDebug() << "CDJ resync position (>0.1 sec)";
syncPosition();
resetSteadyPitch(dVinylPitch, m_dVinylPosition);
} else if (playPos->get() >= 1.0 && dVinylPitch > 0) {
//end of track, force stop
togglePlayButton(false);
resetSteadyPitch(0.0, 0.0);
controlScratch->slotSet(0.0);
m_iPitchRingPos = 0;
m_iPitchRingFilled = 0;
return;
} else {
togglePlayButton(checkSteadyPitch(dVinylPitch, filePosition) > 0.5);
}
// Calculate how much the vinyl's position has drifted from it's timecode and compensate for it.
// (This is caused by the manufacturing process of the vinyl.)
if (m_iVCMode == MIXXX_VCMODE_ABSOLUTE &&
fabs(m_dDriftAmt) > 0.1 && fabs(m_dDriftAmt) < 5.0) {
dDriftControl = m_dDriftAmt * .01;
} else {
dDriftControl = 0.0;
}
m_dVinylPositionOld = m_dVinylPosition;
} else {
//POSITION: NO PITCH: YES
//if we don't have valid position, we're not playing so reset time to current
//estimate vinyl position
if (playPos->get() >= 1.0 && dVinylPitch > 0) {
//end of track, force stop
togglePlayButton(false);
resetSteadyPitch(0.0, 0.0);
controlScratch->slotSet(0.0);
m_iPitchRingPos = 0;
m_iPitchRingFilled = 0;
return;
}
if (m_iVCMode == MIXXX_VCMODE_ABSOLUTE &&
fabs(dVinylPitch) < 0.05 &&
fabs(m_dDriftAmt) >= 0.3) {
//qDebug() << "slow, out of sync, syncing position";
syncPosition();
}
m_dVinylPositionOld = filePosition + m_dDriftAmt;
if (dVinylPitch > 0.2) {
togglePlayButton(checkSteadyPitch(dVinylPitch, filePosition) > 0.5);
}
}
//playbutton status may have changed
reportedPlayButton = playButton->get();
if (reportedPlayButton) {
// Only add to the ring if pitch is stable
m_pPitchRing[m_iPitchRingPos] = dVinylPitch;
if (m_iPitchRingFilled < m_iPitchRingSize) {
m_iPitchRingFilled++;
}
m_iPitchRingPos = (m_iPitchRingPos + 1) % m_iPitchRingSize;
} else {
// Reset ring if pitch isn't steady
m_iPitchRingPos = 0;
m_iPitchRingFilled = 0;
}
//only smooth when we have good position (no smoothing for scratching)
double averagePitch = 0.0;
if (m_iPosition != -1 && reportedPlayButton) {
for (int i = 0; i < m_iPitchRingFilled; ++i) {
averagePitch += m_pPitchRing[i];
}
averagePitch /= m_iPitchRingFilled;
// Round out some of the noise
averagePitch = round(averagePitch * 10000.0);
averagePitch /= 10000.0;
} else {
averagePitch = dVinylPitch;
}
controlScratch->slotSet(averagePitch + dDriftControl);
if (m_iPosition != -1 && reportedPlayButton && uiUpdateTime(filePosition)) {
double true_pitch = averagePitch + dDriftControl;
double pitch_difference = true_pitch - m_dDisplayPitch;
// The true pitch can show a misleading amount of variance --
// differences of .1% or less can show up as 1 or 2 bpm changes.
// Therefore we react slowly to bpm changes to show a more steady
// number to the user.
if (fabs(pitch_difference) > 0.5) {
// For large changes in pitch (start/stop, usually), immediately
// update the display.
m_dDisplayPitch = true_pitch;
} else if (fabs(pitch_difference) > 0.005) {
// For medium changes in pitch, take 4 callback loops to
// converge on the correct amount.
m_dDisplayPitch += pitch_difference * .25;
} else {
// For extremely small changes, converge very slowly.
m_dDisplayPitch += pitch_difference * .01;
}
rateSlider->slotSet(rateDir->get() * (m_dDisplayPitch - 1.0) / rateRange->get());
m_dUiUpdateTime = filePosition;
}
m_dOldFilePos = filePosition;
} else {
// No pitch data available (the needle is up/stopped.... or *really*
// crappy signal)
//POSITION: NO PITCH: NO
//if it's been a long time, we're stopped.
//if it hasn't been long,
//let the track play a wee bit more before deciding we've stopped
rateSlider->slotSet(0.0);
if (m_iVCMode == MIXXX_VCMODE_ABSOLUTE &&
fabs(m_dVinylPosition - filePosition) >= 0.1) {
//qDebug() << "stopped, out of sync, syncing position";
syncPosition();
}
if(fabs(filePosition - m_dOldFilePos) >= 0.1 ||
filePosition == m_dOldFilePos) {
//We are not playing any more
togglePlayButton(false);
resetSteadyPitch(0.0, 0.0);
controlScratch->slotSet(0.0);
//resetSteadyPitch(dVinylPitch, filePosition);
// Notify the UI that the timecode quality is garbage/missing.
m_fTimecodeQuality = 0.0f;
m_iPitchRingPos = 0;
m_iPitchRingFilled = 0;
m_iQualPos = 0;
m_iQualFilled = 0;
m_bForceResync = true;
vinylStatus->slotSet(VINYL_STATUS_OK);
}
}
}
void device_submit(struct device *dv, signed short *pcm, size_t n)
{
assert(dv->timecoder != NULL);
timecoder_submit(dv->timecoder, pcm, n);
}
