From 92442b5699b03791afd63d4517b08eb14b888bb0 Mon Sep 17 00:00:00 2001
From: boblark <bob@janbob.com>
Date: Thu, 9 Mar 2023 19:50:06 -0800
Subject: [PATCH] Add AudioMathConstant_F32

---
 AudioMathConstant_F32.cpp | 13 +++++++++++++
 AudioMathConstant_F32.h   | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 49 insertions(+)
 create mode 100644 AudioMathConstant_F32.cpp
 create mode 100644 AudioMathConstant_F32.h

diff --git a/AudioMathConstant_F32.cpp b/AudioMathConstant_F32.cpp
new file mode 100644
index 0000000..897d652
--- /dev/null
+++ b/AudioMathConstant_F32.cpp
@@ -0,0 +1,13 @@
+#include "AudioMathConstant_F32.h"
+
+void AudioMathConstant_F32::update(void) {
+  audio_block_f32_t *block;
+
+  block = AudioStream_F32::allocate_f32();
+  if (!block) return;
+
+  for(int i=0; i<128; i++)
+     block->data[i] = constant;
+  AudioStream_F32::transmit(block);
+  AudioStream_F32::release(block);
+  }
diff --git a/AudioMathConstant_F32.h b/AudioMathConstant_F32.h
new file mode 100644
index 0000000..125f891
--- /dev/null
+++ b/AudioMathConstant_F32.h
@@ -0,0 +1,36 @@
+/*
+ * AudioMathConstant_F32
+ *
+ * Created: Bob Larkin, March 2023
+ * Purpose: Outputs a block of floating point numbers, all the same.
+ * Default value is 0.0f
+ *
+ * This outputs a single, constant stream of audio data (ie, it is mono)
+ *
+ * MIT License.  use at your own risk.
+*/
+#ifndef _AudioMathConstant_F32_H
+#define _AudioMathConstant_F32_H
+
+#include "AudioStream_F32.h"
+
+class AudioMathConstant_F32 : public AudioStream_F32
+{
+  //GUI: inputs:0, outputs:1  //this line used for automatic generation of GUI node
+  public:
+    AudioMathConstant_F32(void) : AudioStream_F32(0, NULL) {};
+	AudioMathConstant_F32(const AudioSettings_F32 &settings) : AudioStream_F32(0, NULL) {
+		sample_rate_Hz = settings.sample_rate_Hz;
+        block_size = settings.audio_block_samples;
+        };
+
+    void setConstant(float32_t _constant) { constant = _constant; }
+
+    virtual void update(void);
+
+  private:
+    float sample_rate_Hz = AUDIO_SAMPLE_RATE;
+    uint16_t block_size = AUDIO_BLOCK_SAMPLES;
+    float32_t constant = 0.0f;
+};
+#endif