Expose optional live source tracking through SoundTouch

lib/soundtouch-master/include/soundtouch/SoundTouch.h

@@ -67,6 +67,7 @@
 
 #include "FIFOSamplePipe.h"
 #include "STTypes.h"
+#include "SourceSpan.h"
 
 namespace soundtouch
 {
@@ -197,6 +198,8 @@ private:
     /// 'virtualPitch' parameters.
     void calcEffectiveRateAndTempo();
 
+    bool sourceProfileSupported() const;
+
 protected :
     /// Number of channels
     uint  channels;
@@ -211,6 +214,13 @@ public:
     SoundTouch();
     ~SoundTouch() override;
 
+    /* uTun: подключать после настройки, до первого putSamples либо после clear.
+     * Поддерживается float PCM, unity pitch/rate, cubic interpolation, AA off, mono/stereo.
+     * Ошибка сообщает Invalid и возвращает false. Изменение профиля после начала и flush
+     * инвалидируют карту; clear начинает новую. nullptr отключает события в любой момент.
+     * События описывают произведённый выход, включая ещё не прочитанные receiveSamples данные. */
+    bool setSourceCallback(SourceCallback callback, void* context);
+
     /// Get SoundTouch library version string
     static const char *getVersionString();
 

lib/soundtouch-master/source/SoundTouch/SoundTouch.cpp

@@ -117,6 +117,28 @@ SoundTouch::~SoundTouch()
     delete pTDStretch;
 }
 
+bool SoundTouch::sourceProfileSupported() const
+{
+#if defined(SOUNDTOUCH_FLOAT_SAMPLES) && !defined(SOUNDTOUCH_PREVENT_CLICK_AT_RATE_CROSSOVER)
+    return rate == 1.0 && virtualPitch == 1.0 && channels >= 1 && channels <= 2
+        && bSrateSet && pRateTransposer->unitySourceOffset() >= 0;
+#else
+    return false;
+#endif
+}
+
+bool SoundTouch::setSourceCallback(SourceCallback callback, void* context)
+{
+    if (!callback) { pTDStretch->setSourceCallback(nullptr, nullptr, 0); return true; }
+    if (samplesExpectedOut != 0 || !sourceProfileSupported())
+    {
+        callback(context, {SourceKind::Invalid, samplesExpectedOut != 0 ? SourceError::LateAttach : SourceError::Profile});
+        return false;
+    }
+    pTDStretch->setSourceCallback(callback, context, (unsigned)pRateTransposer->unitySourceOffset());
+    return true;
+}
+
 
 /// Get SoundTouch library version string
 const char *SoundTouch::getVersionString()
@@ -139,6 +161,8 @@ void SoundTouch::setChannels(uint numChannels)
 {
     if (!verifyNumberOfChannels(numChannels)) return;
 
+    if (samplesExpectedOut != 0) pTDStretch->invalidateSource(SourceError::Reconfigure);
+
     channels = numChannels;
     pRateTransposer->setChannels((int)numChannels);
     pTDStretch->setChannels((int)numChannels);
@@ -223,6 +247,8 @@ void SoundTouch::calcEffectiveRateAndTempo()
     tempo = virtualTempo / virtualPitch;
     rate = virtualPitch * virtualRate;
 
+    if (rate != 1.0 || virtualPitch != 1.0) pTDStretch->invalidateSource(SourceError::Profile);
+
     if (!TEST_FLOAT_EQUAL(rate,oldRate)) pRateTransposer->setRate(rate);
     if (!TEST_FLOAT_EQUAL(tempo, oldTempo)) pTDStretch->setTempo(tempo);
 
@@ -266,6 +292,7 @@ void SoundTouch::calcEffectiveRateAndTempo()
 // Sets sample rate.
 void SoundTouch::setSampleRate(uint srate)
 {
+    if (samplesExpectedOut != 0) pTDStretch->invalidateSource(SourceError::Reconfigure);
     // set sample rate, leave other tempo changer parameters as they are.
     pTDStretch->setParameters((int)srate);
     bSrateSet = true;
@@ -285,6 +312,8 @@ void SoundTouch::putSamples(const SAMPLETYPE *samples, uint nSamples)
         ST_THROW_RT_ERROR("SoundTouch : Number of channels not defined");
     }
 
+    if (!sourceProfileSupported()) pTDStretch->invalidateSource(SourceError::Profile);
+
     // accumulate how many samples are expected out from processing, given the current
     // processing setting
     samplesExpectedOut += (double)nSamples / ((double)rate * (double)tempo);
@@ -317,6 +346,8 @@ void SoundTouch::putSamples(const SAMPLETYPE *samples, uint nSamples)
 // in the middle of a sound stream.
 void SoundTouch::flush()
 {
+    // Padding и обрезка финального выхода не входят в контракт live-карты.
+    pTDStretch->invalidateSource(SourceError::Flush);
     int i;
     int numStillExpected;
     SAMPLETYPE *buff = new SAMPLETYPE[128 * channels];
@@ -350,6 +381,8 @@ void SoundTouch::flush()
 // 'SETTING_...' defines for available setting ID's.
 bool SoundTouch::setSetting(int settingId, int value)
 {
+    if (samplesExpectedOut != 0 && settingId != SETTING_USE_QUICKSEEK)
+        pTDStretch->invalidateSource(SourceError::Reconfigure);
     int sampleRate, sequenceMs, seekWindowMs, overlapMs;
 
     // read current tdstretch routine parameters