wip - linear parameter automation is now working

src/AudioEffectSOS.h

@@ -46,6 +46,8 @@ public:
 
     // *** CONSTRUCTORS ***
     AudioEffectSOS() = delete;
+    AudioEffectSOS(float maxDelayMs);
+    AudioEffectSOS(size_t numSamples);
 
     /// Construct an analog delay using external SPI via an ExtMemSlot. The amount of
     /// delay will be determined by the amount of memory in the slot.
@@ -66,6 +68,9 @@ public:
     /// Note that audio still passes through when bypass is enabled.
     void bypass(bool byp) { m_bypass = byp; }
 
+    /// Activate the gate automation. Input gate will open, then close.
+    void trigger() { m_inputGateAuto.trigger(); }
+
     /// Set the output volume. This affect both the wet and dry signals.
     /// @details The default is 1.0.
     /// @param vol Sets the output volume between -1.0 and +1.0
@@ -74,7 +79,7 @@ public:
     // ** ENABLE  / DISABLE **
 
     /// Enables audio processing. Note: when not enabled, CPU load is nearly zero.
-    void enable() { m_enable = true; }
+    void enable();
 
     /// Disables audio process. When disabled, CPU load is nearly zero.
     void disable() { m_enable = false; }
@@ -123,12 +128,12 @@ private:
     float m_volume = 1.0f;
 
     // Automated Controls
-    BALibrary::ParameterAutomation<float> m_inputGateAuto =
-            BALibrary::ParameterAutomation<float>(0.0f, 1.0f, 0.0f, BALibrary::ParameterAutomation<float>::Function::LINEAR);
+    BALibrary::ParameterAutomationSequence<float> m_inputGateAuto =
+            BALibrary::ParameterAutomationSequence<float>(3);
 
     // Private functions
     void m_preProcessing (audio_block_t *out, audio_block_t *input, audio_block_t *delayedSignal);
-    //void m_postProcessing(audio_block_t *out, audio_block_t *dry, audio_block_t *wet);
+    void m_postProcessing(audio_block_t *out, audio_block_t *input);
 };
 
 }

src/BAHardware.h

@@ -74,11 +74,17 @@ constexpr size_t MEM_MAX_ADDR[NUM_MEM_SLOTS] = { 131071, 131071 };
 /**************************************************************************//**
  * General Purpose SPI Interfaces
  *****************************************************************************/
-enum SpiDeviceId : unsigned {
+enum class SpiDeviceId : unsigned {
 	SPI_DEVICE0 = 0, ///< Arduino SPI device
 	SPI_DEVICE1 = 1  ///< Arduino SPI1 device
 };
 constexpr int SPI_MAX_ADDR = 131071; ///< Max address size per chip
+constexpr size_t SPI_MEM0_SIZE_BYTES = 131072;
+constexpr size_t SPI_MEM0_MAX_AUDIO_SAMPLES = SPI_MEM0_SIZE_BYTES/sizeof(int16_t);
+
+constexpr size_t SPI_MEM1_SIZE_BYTES = 131072;
+constexpr size_t SPI_MEM1_MAX_AUDIO_SAMPLES = SPI_MEM1_SIZE_BYTES/sizeof(int16_t);
+
 
 
 #else

src/LibBasicFunctions.h

@@ -153,6 +153,12 @@ public:
     /// @returns a pointer to the requested audio_block_t
     audio_block_t *getBlock(size_t index);
 
+    /// Returns the max possible delay samples. For INTERNAL memory, the delay can be equal to
+    /// the full maxValue specified. For EXTERNAL memory, the max delay is actually one audio
+    /// block less then the full size to prevent wrapping.
+    /// @returns the maximum delay offset in units of samples.
+    size_t getMaxDelaySamples();
+
     /// Retrieve an audio block (or samples) from the buffer.
     /// @details when using INTERNAL memory, only supported size is AUDIO_BLOCK_SAMPLES. When using
     /// EXTERNAL, a size smaller than AUDIO_BLOCK_SAMPLES can be requested.
@@ -167,6 +173,8 @@ public:
     /// @returns pointer to the underlying ExtMemSlot.
     ExtMemSlot *getSlot() const { return m_slot; }
 
+
+
     /// Ween using INTERNAL memory, thsi function can return a pointer to the underlying RingBuffer that contains
     /// audio_block_t * pointers.
     /// @returns pointer to the underlying RingBuffer
@@ -183,6 +191,7 @@ private:
     MemType m_type;                                      ///< when 0, INTERNAL memory, when 1, external MEMORY.
     RingBuffer<audio_block_t *> *m_ringBuffer = nullptr; ///< When using INTERNAL memory, a RingBuffer will be created.
     ExtMemSlot *m_slot = nullptr;                        ///< When using EXTERNAL memory, an ExtMemSlot must be provided.
+    size_t m_maxDelaySamples = 0;                             ///< stores the number of audio samples in the AudioDelay.
 };
 
 /**************************************************************************//**
@@ -317,6 +326,7 @@ class ParameterAutomation
 public:
     enum class Function : unsigned {
         NOT_CONFIGURED = 0, ///< Initial, unconfigured stage
+        HOLD,         ///< f(x) = constant
         LINEAR,       ///< f(x) = x
         EXPONENTIAL,  ///< f(x) = e^x
         LOGARITHMIC,  ///< f(x) = ln(x)
@@ -350,9 +360,10 @@ private:
     T m_startValue;
     T m_endValue;
     bool m_running = false;
-    T m_currentValueX; ///< the current value of x in f(x)
+    float m_currentValueX; ///< the current value of x in f(x)
     size_t m_duration;
-    T m_coeffs[3]; ///< some general coefficient storage
+    float m_coeffs[3]; ///< some general coefficient storage
+    bool m_positiveSlope = true;
 };
 
 
@@ -380,6 +391,7 @@ private:
     ParameterAutomation<T> *m_paramArray[MAX_PARAMETER_SEQUENCES];
     int m_currentIndex = 0;
     int m_numStages = 0;
+    bool m_running = false;
 };
 
 } // BALibrary

src/common/AudioDelay.cpp

@@ -34,6 +34,7 @@ AudioDelay::AudioDelay(size_t maxSamples)
 	// INTERNAL memory consisting of audio_block_t data structures.
 	QueuePosition pos = calcQueuePosition(maxSamples);
 	m_ringBuffer = new RingBuffer<audio_block_t *>(pos.index+2); // If the delay is in queue x, we need to overflow into x+1, thus x+2 total buffers.
+	m_maxDelaySamples = maxSamples;
 }
 
 AudioDelay::AudioDelay(float maxDelayTimeMs)
@@ -46,6 +47,7 @@ AudioDelay::AudioDelay(ExtMemSlot *slot)
 {
 	m_type = (MemType::MEM_EXTERNAL);
 	m_slot = slot;
+	m_maxDelaySamples = (slot->size() / sizeof(int16_t)) - AUDIO_BLOCK_SAMPLES;
 }
 
 AudioDelay::~AudioDelay()
@@ -93,6 +95,11 @@ audio_block_t* AudioDelay::getBlock(size_t index)
 	return ret;
 }
 
+size_t AudioDelay::getMaxDelaySamples()
+{
+    return m_maxDelaySamples;
+}
+
 bool AudioDelay::getSamples(audio_block_t *dest, size_t offsetSamples, size_t numSamples)
 {
 	if (!dest) {
@@ -159,8 +166,9 @@ bool AudioDelay::getSamples(audio_block_t *dest, size_t offsetSamples, size_t nu
 
 			return true;
 		} else {
-			// numSampmles is > than total slot size
+			// numSamples is > than total slot size
 			Serial.println("getSamples(): ERROR numSamples > total slot size");
+			Serial.println(numSamples + String(" > ") + m_slot->size());
 			return false;
 		}
 	}

src/common/ExternalSramManager.cpp

@@ -37,8 +37,8 @@ ExternalSramManager::ExternalSramManager(unsigned numMemories)
 	// Initialize the static memory configuration structs
 	if (!m_configured) {
 		for (unsigned i=0; i < NUM_MEM_SLOTS; i++) {
-			m_memConfig[i].size           = MEM_MAX_ADDR[i];
-			m_memConfig[i].totalAvailable = MEM_MAX_ADDR[i];
+			m_memConfig[i].size           = MEM_MAX_ADDR[i]+1;
+			m_memConfig[i].totalAvailable = MEM_MAX_ADDR[i]+1;
 			m_memConfig[i].nextAvailable  = 0;
 
 			m_memConfig[i].m_spi = nullptr;
@@ -111,7 +111,9 @@ bool ExternalSramManager::requestMemory(ExtMemSlot *slot, size_t sizeBytes, BAGu
 		return true;
 	} else {
 		// there is not enough memory available for the request
-
+	    Serial.println(String("ExternalSramManager::requestMemory(): Insufficient memory in slot, request/available: ")
+	            + sizeBytes + String(" : ")
+	            + m_memConfig[mem].totalAvailable);
 		return false;
 	}
 }

src/common/ParameterAutomation.cpp

@@ -28,6 +28,7 @@ namespace BALibrary {
 // ParameterAutomation
 ///////////////////////////////////////////////////////////////////////////////
 constexpr int LINEAR_SLOPE = 0;
+
 template <class T>
 ParameterAutomation<T>::ParameterAutomation()
 {
@@ -64,10 +65,20 @@ void ParameterAutomation<T>::reconfigure(T startValue, T endValue, size_t durati
     m_function = function;
     m_startValue = startValue;
     m_endValue = endValue;
-    m_currentValueX = startValue;
+    m_currentValueX = static_cast<float>(startValue);
     m_duration = durationSamples;
     m_running = false;
 
+    if (endValue >= startValue) {
+        // value is increasing
+        m_positiveSlope = true;
+    } else {
+        // value is decreasing
+        m_positiveSlope = false;
+    }
+
+    float duration = m_duration / static_cast<float>(AUDIO_BLOCK_SAMPLES);
+
     // Pre-compute any necessary coefficients
     switch(m_function) {
     case Function::EXPONENTIAL :
@@ -80,9 +91,14 @@ void ParameterAutomation<T>::reconfigure(T startValue, T endValue, size_t durati
         break;
 
     // Default will be same as LINEAR
+    case Function::HOLD   :
+        m_coeffs[LINEAR_SLOPE] = (1.0f / static_cast<float>(duration)); // convert duration from ms to sec
+        break;
     case Function::LINEAR :
     default :
-        m_coeffs[LINEAR_SLOPE] = (endValue - startValue) / static_cast<T>(m_duration);
+        // The number of parameter updates will be duration in samples divided by audio sample block size since
+        // we only update once per block.
+        m_coeffs[LINEAR_SLOPE] = static_cast<float>(endValue - startValue) / duration; // convert duration from ms to sec
         break;
     }
 }
@@ -91,13 +107,33 @@ void ParameterAutomation<T>::reconfigure(T startValue, T endValue, size_t durati
 template <class T>
 void ParameterAutomation<T>::trigger()
 {
-    m_currentValueX = m_startValue;
+    if (m_function == Function::HOLD) {
+        // The HOLD function will move currentValueX from 0 to 1.0 over the desired duration,
+        // but will always return the startValue.
+        m_currentValueX = 0.0f;
+    } else {
+        m_currentValueX = static_cast<float>(m_startValue);
+    }
     m_running = true;
+    //Serial.println("ParameterAutomation<T>::trigger() called");
 }
 
 template <class T>
 T ParameterAutomation<T>::getNextValue()
 {
+    if (m_running == false) {
+        return m_startValue;
+    }
+
+    if (m_function == Function::HOLD) {
+        // HOLD is treated as a special case
+        m_currentValueX += m_coeffs[LINEAR_SLOPE];
+        if (m_currentValueX >= 1.0) {
+            m_running = false;
+        }
+        return m_startValue;
+    }
+
     switch(m_function) {
     case Function::EXPONENTIAL :
         break;
@@ -107,24 +143,28 @@ T ParameterAutomation<T>::getNextValue()
         break;
     case Function::LOOKUP_TABLE :
         break;
-
-    // Default will be same as LINEAR
     case Function::LINEAR :
     default :
         // output = m_currentValueX + slope
         m_currentValueX += m_coeffs[LINEAR_SLOPE];
-        if (m_currentValueX >= m_endValue) {
-            m_currentValueX = m_endValue;
-            m_running = false;
-        }
         break;
     }
-    return m_currentValueX;
+
+    // Check if the automation is finished.
+    if ( ( m_positiveSlope && (m_currentValueX >= m_endValue)) ||
+         (!m_positiveSlope && (m_currentValueX <= m_endValue)) ) {
+        m_running = false;
+        return m_endValue;
+    } else {
+        return static_cast<T>(m_currentValueX);
+    }
 }
 
 // Template instantiation
 //template class MyStack<int, 6>;
 template class ParameterAutomation<float>;
+template class ParameterAutomation<int>;
+template class ParameterAutomation<unsigned>;
 
 ///////////////////////////////////////////////////////////////////////////////
 // ParameterAutomationSequence
@@ -132,7 +172,6 @@ template class ParameterAutomation<float>;
 template <class T>
 ParameterAutomationSequence<T>::ParameterAutomationSequence(int numStages)
 {
-    //m_paramArray = malloc(sizeof(ParameterAutomation<T>*) * numStages);
     if (numStages < MAX_PARAMETER_SEQUENCES) {
         for (int i=0; i<numStages; i++) {
             m_paramArray[i] = new ParameterAutomation<T>();
@@ -147,37 +186,65 @@ ParameterAutomationSequence<T>::ParameterAutomationSequence(int numStages)
 template <class T>
 ParameterAutomationSequence<T>::~ParameterAutomationSequence()
 {
-    //if (m_paramArray) {
     for (int i=0; i<m_numStages; i++) {
         if (m_paramArray[i]) {
             delete m_paramArray[i];
         }
     }
-    //    delete m_paramArray;
-    //}
 }
 
 template <class T>
 void ParameterAutomationSequence<T>::setupParameter(int index, T startValue, T endValue, size_t durationSamples, typename ParameterAutomation<T>::Function function)
 {
     m_paramArray[index]->reconfigure(startValue, endValue, durationSamples, function);
+    m_currentIndex = 0;
 }
 
 template <class T>
 void ParameterAutomationSequence<T>::setupParameter(int index, T startValue, T endValue, float durationMilliseconds, typename ParameterAutomation<T>::Function function)
 {
     m_paramArray[index]->reconfigure(startValue, endValue, durationMilliseconds, function);
+    m_currentIndex = 0;
 }
 
 template <class T>
 void ParameterAutomationSequence<T>::trigger(void)
 {
     m_currentIndex = 0;
-    for (int i=0; i<m_numStages; i++) {
-        m_paramArray[i]->trigger();
+    m_paramArray[0]->trigger();
+    m_running = true;
+    //Serial.println("ParameterAutomationSequence<T>::trigger() called");
+}
+
+template <class T>
+T ParameterAutomationSequence<T>::getNextValue()
+{
+    // Get the next value
+    T nextValue = m_paramArray[m_currentIndex]->getNextValue();
+
+    if (m_running) {
+        //Serial.println(String("ParameterAutomationSequence<T>::getNextValue() is ") + nextValue
+        //        + String(" from stage ") + m_currentIndex);
+
+        // If current stage is done, trigger the next
+        if (m_paramArray[m_currentIndex]->isFinished()) {
+            Serial.println(String("Finished stage ") + m_currentIndex);
+            m_currentIndex++;
+
+            if (m_currentIndex >= m_numStages) {
+                // Last stage already finished
+                m_running = false;
+                m_currentIndex = 0;
+            } else {
+                // trigger the next stage
+                m_paramArray[m_currentIndex]->trigger();
+            }
         }
     }
 
+    return nextValue;
+}
+
 template <class T>
 bool ParameterAutomationSequence<T>::isFinished()
 {
@@ -188,6 +255,7 @@ bool ParameterAutomationSequence<T>::isFinished()
             break;
         }
     }
+    m_running = !finished;
     return finished;
 }
 

src/effects/AudioEffectAnalogDelay.cpp

@@ -166,6 +166,11 @@ void AudioEffectAnalogDelay::delay(float milliseconds)
 {
 	size_t delaySamples = calcAudioSamples(milliseconds);
 
+	if (delaySamples > m_memory->getMaxDelaySamples()) {
+	    // this exceeds max delay value, limit it.
+	    delaySamples = m_memory->getMaxDelaySamples();
+	}
+
 	if (!m_memory) { Serial.println("delay(): m_memory is not valid"); }
 
 	if (!m_externalMemory) {

src/effects/AudioEffectSOS.cpp

@@ -19,18 +19,51 @@ constexpr int MIDI_CONTROL = 1;
 constexpr float MAX_GATE_OPEN_TIME_MS = 3000.0f;
 constexpr float MAX_GATE_CLOSE_TIME_MS = 3000.0f;
 
+constexpr int GATE_OPEN_STAGE = 0;
+constexpr int GATE_HOLD_STAGE = 1;
+constexpr int GATE_CLOSE_STAGE = 2;
+
+AudioEffectSOS::AudioEffectSOS(float maxDelayMs)
+: AudioStream(1, m_inputQueueArray)
+{
+    m_memory = new AudioDelay(maxDelayMs);
+    m_maxDelaySamples = calcAudioSamples(maxDelayMs);
+    m_externalMemory = false;
+}
+
+AudioEffectSOS::AudioEffectSOS(size_t numSamples)
+: AudioStream(1, m_inputQueueArray)
+{
+    m_memory = new AudioDelay(numSamples);
+    m_maxDelaySamples = numSamples;
+    m_externalMemory = false;
+}
+
 AudioEffectSOS::AudioEffectSOS(ExtMemSlot *slot)
 : AudioStream(1, m_inputQueueArray)
 {
     m_memory = new AudioDelay(slot);
-    m_maxDelaySamples = (slot->size() / sizeof(int16_t));
-    m_delaySamples = m_maxDelaySamples;
     m_externalMemory = true;
 }
 
 AudioEffectSOS::~AudioEffectSOS()
 {
+    if (m_memory) delete m_memory;
+}
 
+void AudioEffectSOS::enable(void)
+{
+    m_enable = true;
+    if (m_externalMemory) {
+        // Because we hold the previous output buffer for an update cycle, the maximum delay is actually
+        // 1 audio block mess then the max delay returnable from the memory.
+        m_maxDelaySamples = m_memory->getMaxDelaySamples();
+        Serial.println(String("SOS Enabled with delay length ") + m_maxDelaySamples + String(" samples"));
+    }
+    m_delaySamples = m_maxDelaySamples;
+    m_inputGateAuto.setupParameter(GATE_OPEN_STAGE, 0.0f, 1.0f, 1000.0f, ParameterAutomation<float>::Function::LINEAR);
+    m_inputGateAuto.setupParameter(GATE_HOLD_STAGE, 1.0f, 1.0f, 1000.0f, ParameterAutomation<float>::Function::HOLD);
+    m_inputGateAuto.setupParameter(GATE_CLOSE_STAGE, 1.0f, 0.0f, 1000.0f, ParameterAutomation<float>::Function::LINEAR);
 }
 
 void AudioEffectSOS::update(void)
@@ -58,7 +91,7 @@ void AudioEffectSOS::update(void)
     }
 
     // Check is block is bypassed, if so either transmit input directly or create silence
-    if (m_bypass == true) {
+    if ( (m_bypass == true) || (!inputAudioBlock) ) {
         // transmit the input directly
         if (!inputAudioBlock) {
             // create silence
@@ -73,6 +106,8 @@ void AudioEffectSOS::update(void)
         return;
     }
 
+    if (!inputAudioBlock) return;
+
     // Otherwise perform normal processing
     // In order to make use of the SPI DMA, we need to request the read from memory first,
     // then do other processing while it fills in the back.
@@ -83,6 +118,8 @@ void AudioEffectSOS::update(void)
     // get the data. If using external memory with DMA, this won't be filled until
     // later.
     m_memory->getSamples(blockToOutput, m_delaySamples);
+    //Serial.println(String("Delay samples:") + m_delaySamples);
+    //Serial.println(String("Use dma: ") + m_memory->getSlot()->isUseDma());
 
     // If using DMA, we need something else to do while that read executes, so
     // move on to input preprocessing
@@ -95,6 +132,8 @@ void AudioEffectSOS::update(void)
     // consider doing the BBD post processing here to use up more time while waiting
     // for the read data to come back
     audio_block_t *blockToRelease = m_memory->addBlock(preProcessed);
+    //audio_block_t *blockToRelease = m_memory->addBlock(inputAudioBlock);
+    //Serial.println("Done adding new block");
 
 
     // BACK TO OUTPUT PROCESSING
@@ -105,13 +144,19 @@ void AudioEffectSOS::update(void)
     }
 
     // perform the wet/dry mix mix
-    //m_postProcessing(blockToOutput, inputAudioBlock, blockToOutput);
+    m_postProcessing(blockToOutput, blockToOutput);
     transmit(blockToOutput);
 
     release(inputAudioBlock);
+
+    if (m_previousBlock)
         release(m_previousBlock);
     m_previousBlock = blockToOutput;
 
+    if (m_blockToRelease == m_previousBlock) {
+        Serial.println("ERROR: POINTER COLLISION");
+    }
+
     if (m_blockToRelease) release(m_blockToRelease);
     m_blockToRelease = blockToRelease;
 }
@@ -121,12 +166,13 @@ void AudioEffectSOS::gateOpenTime(float milliseconds)
 {
     // TODO - change the paramter automation to an automation sequence
     m_openTimeMs = milliseconds;
-    //m_inputGateAuto.reconfigure();
+    m_inputGateAuto.setupParameter(GATE_OPEN_STAGE, 0.0f, 1.0f, m_openTimeMs, ParameterAutomation<float>::Function::LINEAR);
 }
 
 void AudioEffectSOS::gateCloseTime(float milliseconds)
 {
     m_closeTimeMs = milliseconds;
+    m_inputGateAuto.setupParameter(GATE_CLOSE_STAGE, 1.0f, 0.0f, m_closeTimeMs, ParameterAutomation<float>::Function::LINEAR);
 }
 
 ////////////////////////////////////////////////////////////////////////
@@ -149,7 +195,7 @@ void AudioEffectSOS::processMidi(int channel, int control, int value)
         (m_midiConfig[GATE_CLOSE_TIME][MIDI_CONTROL] == control)) {
         // Gate Close Time
         gateCloseTime(val * MAX_GATE_CLOSE_TIME_MS);
-        Serial.println(String("AudioEffectSOS::gate close time (ms): ") + m_openTimeMs);
+        Serial.println(String("AudioEffectSOS::gate close time (ms): ") + m_closeTimeMs);
         return;
     }
 
@@ -180,8 +226,8 @@ void AudioEffectSOS::processMidi(int channel, int control, int value)
     if ((m_midiConfig[GATE_TRIGGER][MIDI_CHANNEL] == channel) &&
         (m_midiConfig[GATE_TRIGGER][MIDI_CONTROL] == control)) {
         // The gate is trigged by any value
-        m_inputGateAuto.trigger();
         Serial.println(String("AudioEffectSOS::Gate Triggered!"));
+        m_inputGateAuto.trigger();
         return;
     }
 }
@@ -203,17 +249,25 @@ void AudioEffectSOS::m_preProcessing (audio_block_t *out, audio_block_t *input,
     if ( out && input && delayedSignal) {
         // Multiply the input signal by the automated gate value
         // Multiply the delayed signal by the user set feedback value
-        // then mix together.
+
         float gateVol = m_inputGateAuto.getNextValue();
+
+        //float gateVol = 1.0f;
         audio_block_t tempAudioBuffer;
         gainAdjust(out, input, gateVol, 0); // last paremeter is coeff shift, 0 bits
-        gainAdjust(&tempAudioBuffer, delayedSignal, m_feedback, 0); // last paremeter is coeff shift, 0 bits
+        gainAdjust(&tempAudioBuffer, delayedSignal, m_feedback, 0); // last parameter is coeff shift, 0 bits
         combine(out, out, &tempAudioBuffer);
+
     } else if (input) {
         memcpy(out->data, input->data, sizeof(int16_t) * AUDIO_BLOCK_SAMPLES);
     }
 }
 
+void AudioEffectSOS::m_postProcessing(audio_block_t *out, audio_block_t *in)
+{
+    gainAdjust(out, out, m_volume, 0);
+}
+
 
 } // namespace BAEffects