diff CollidoscopeApp/include/BufferToWaveRecorderNode.h @ 0:02467299402e

First import

CollidoscopeApp for Raspberry Pi
JackDevice
Teensy code for Collidoscope

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/CollidoscopeApp/include/BufferToWaveRecorderNode.h	Thu Jun 30 14:50:06 2016 +0200
@@ -0,0 +1,92 @@
+#pragma once
+
+#include "cinder/Cinder.h"
+#include "cinder/audio/Node.h"
+#include "cinder/audio/SampleRecorderNode.h"
+#include "cinder/audio/dsp/RingBuffer.h"
+#include "cinder/Filesystem.h"
+
+#include "Messages.h"
+
+typedef std::shared_ptr<class BufferToWaveRecorderNode>	BufferToWaveRecorderNodeRef;
+
+typedef ci::audio::dsp::RingBufferT<RecordWaveMsg> RecordWaveMsgRingBuffer;
+
+
+class BufferToWaveRecorderNode : public ci::audio::SampleRecorderNode {
+public:
+
+    static const float kRampTime;
+
+    //! Constructor. numChunks is the total number of chunks this biffer has to be borken down in. 
+    //! numSeconds lenght of the buffer in seconds 
+    BufferToWaveRecorderNode( std::size_t numChunks, double numSeconds );
+
+    //! Starts recording. Resets the write position to zero (call disable() to pause recording).
+    void start();
+    //! Stops recording. Same as calling disable().
+    void stop();
+
+    //! \brief Sets the length of the recording buffer in frames.
+    //!
+    //! If the write position is non-zero, the old contents will be preserved (by copying it to the newly allocated Buffer).
+    //! If \a shrinkToFit is set to `true`, the internal Buffer will be down-sized if necessary, otherwise it will only re-allocate when growing while changing its dimensions to match \a numFrames (default shrinkToFit = false).
+    void setNumFrames(size_t numFrames, bool shrinkToFit = false);
+    //! Sets the length of the recording buffer in seconds. \see setNumFrames
+    void setNumSeconds(double numSeconds, bool shrinkToFit = false);
+
+    //! Returns the length of the recording buffer in frames.
+    size_t		getNumFrames() const	{ return mRecorderBuffer.getNumFrames(); }
+    //! Returns the length of the recording buffer in seconds.
+    double		getNumSeconds() const;
+
+    //! \brief Returns a copy of the recored samples, up to the current write position.
+    //!
+    //! This method is non locking, and as such any resizing calls must be performed on the same thread or be otherwise synchronized.
+    ci::audio::BufferRef	getRecordedCopy() const;
+
+    //! \brief Writes the currently recorded samples to a file at \a filePath
+    //!
+    //! The encoding format is derived from \a filePath's extension and \a sampleType (default = SampleType::INT_16).
+    //! \note throws AudioFileExc if the write request cannot be completed.
+    void writeToFile(const ci::fs::path &filePath, ci::audio::SampleType sampleType = ci::audio::SampleType::INT_16);
+
+    //! Returns the frame of the last buffer overrun or 0 if none since the last time this method was called. When this happens, it means the recorded buffer probably has skipped some frames.
+    uint64_t getLastOverrun();
+
+    RecordWaveMsgRingBuffer& getRingBuffer() { return mRingBuffer; }
+
+    ci::audio::Buffer* getRecorderBuffer() { return &mRecorderBuffer; }
+
+
+protected:
+    void initialize()				override;
+    void process(ci::audio::Buffer *buffer)	override;
+
+    void initBuffers(size_t numFrames);
+
+    static const float kMinAudioVal; 
+    static const float kMaxAudioVal;
+
+    ci::audio::BufferDynamic		mRecorderBuffer;
+    ci::audio::BufferDynamicRef		mCopiedBuffer;
+    std::atomic<uint64_t>	mLastOverrun;
+
+    RecordWaveMsgRingBuffer mRingBuffer;
+
+    const std::size_t mNumChunks;
+    const double mNumSeconds;
+    std::size_t mNumSamplesPerChunk;
+    std::atomic<std::size_t> mChunkIndex;
+
+    size_t mChunkSampleCounter;
+    float mChunkMaxAudioVal;
+    float mChunkMinAudioVal;
+
+    float mEnvRamp;
+    float mEnvRampRate;
+    size_t mEnvRampLen;
+    size_t mEnvDecayStart;
+
+};
+