feat: more work

packages/react-native-audio-api/common/cpp/core/AudioArray.cpp

@@ -1,4 +1,5 @@
 #include "AudioArray.h"
+#include "VectorMath.h"
 
 namespace audioapi {
 
@@ -47,4 +48,27 @@ void AudioArray::copy(const AudioArray &source) {
   memcpy(data_, source.data_, size_ * sizeof(float));
 }
 
-}
+float AudioArray::getMaxAbsValue() const {
+  return VectorMath::maximumMagnitude(data_, size_);
+};
+
+void AudioArray::normalize() {
+  float maxAbsValue = getMaxAbsValue();
+
+  if (maxAbsValue == 0.0f || maxAbsValue == 1.0f) {
+    return;
+  }
+
+  VectorMath::multiplyByScalar(data_, 1.0f / maxAbsValue, data_, size_);
+};
+
+void AudioArray::scale(float value) {
+  VectorMath::multiplyByScalar(data_, value, data_, size_);
+};
+
+void AudioArray::sum(const AudioArray &source) {
+  VectorMath::add(data_, source.data_, data_, size_);
+};
+
+} // namespace audioapi
+

packages/react-native-audio-api/common/cpp/core/AudioArray.h

@@ -19,6 +19,12 @@ class AudioArray {
     void resize(int size);
     void copy(const AudioArray &source);
 
+    float getMaxAbsValue() const;
+
+    void normalize();
+    void scale(float value);
+    void sum(const AudioArray &source);
+
   private:
     float *data_;
     int size_;

packages/react-native-audio-api/common/cpp/core/AudioChannel.cpp

@@ -0,0 +1,18 @@
+#include "AudioChannel.h"
+#include "AudioArray.h"
+
+namespace audioapi {
+
+explicit AudioChannel::AudioChannel(int length, int sampleRate) : length_(length), sampleRate_(sampleRate) {
+  data_ = std::make_unique<AudioArray>(length_);
+};
+
+int AudioChannel::getLength() const {
+  return length_;
+};
+
+int AudioChannel::getSampleRate() const {
+  return sampleRate_;
+};
+
+} // namespace audioapi

packages/react-native-audio-api/common/cpp/core/AudioChannel.h

@@ -13,12 +13,18 @@ class AudioChannel {
     [[nodiscard]] int getSampleRate() const;
 
     void zero();
-    void scale(float scale);
+    void copy(const AudioChannel &source);
+
+    float& operator[](int index);
+    const float& operator[](int index) const;
+
 
-    void sumFrom(const AudioChannel &source);
-    void copyFrom(const AudioChannel &source);
+    float getMaxAbsValue() const;
+
+    void normalize();
+    void scale(float scale);
+    void sum(const AudioChannel &source);
 
-    float maxAbsValue() const;
 
   private:
 

packages/react-native-audio-api/common/cpp/core/AudioDestinationNode.cpp

@@ -1,5 +1,6 @@
 #include "AudioDestinationNode.h"
 #include "BaseAudioContext.h"
+#include "VectorMath.h"
 
 namespace audioapi {
 

packages/react-native-audio-api/common/cpp/core/AudioDestinationNode.h

@@ -5,7 +5,6 @@
 #include <vector>
 
 #include "AudioNode.h"
-#include "VectorMath.h"
 
 namespace audioapi {
 

packages/react-native-audio-api/common/cpp/core/StereoPannerNode.h

@@ -5,7 +5,6 @@
 
 #include "AudioNode.h"
 #include "AudioParam.h"
-#include "VectorMath.h"
 
 namespace audioapi {