rtttl example

Author: pschatzmann

examples/examples-audiokit/streams-rtttl-audiokit/streams-rtttl-audiokit.ino

@@ -0,0 +1,32 @@
+#include "AudioTools.h"
+#include "AudioTools/AudioLibs/AudioBoardStream.h"
+
+AudioInfo info(44100, 2, 16);
+SineWaveGenerator<int16_t> sineWave(32000);  // subclass of SoundGenerator with max amplitude of 32000
+AudioBoardStream out(AudioKitEs8388V1);
+RTTTLOutput<int16_t> rtttl(sineWave, out);
+
+// Arduino Setup
+void setup(void) {
+  // Open Serial
+  Serial.begin(115200);
+  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);
+  delay(5000);
+
+  // start I2S
+  Serial.println("starting I2S...");
+  auto config = out.defaultConfig(TX_MODE);
+  config.copyFrom(info);
+  out.begin(config);
+
+  // Setup sine wave (optional)
+  sineWave.begin(info);
+  Serial.println("started...");
+}
+
+// Arduino loop - copy sound to out
+void loop() {
+  rtttl.begin(info);
+  rtttl.print("ComplexDemo: d=8, o=5, b=140: c4 e g c6 a5 g4 e g a g4 e c4 e2 g4 c6 a5 g4 e g a g4 e c2 p c4 e g c6 a5 g4 e g a g4 e c4 e2 g4 c6 a5 g4 e g a g4 e c2");
+  delay(1000);
+}

src/AudioTools/CoreAudio/RTTTLOutput.h

@@ -139,6 +139,7 @@ class RTTTLOutput : public AudioOutput {
    * successful.
    */
   bool begin() override {
+    LOGD("RTTTLOutput::begin");
     if (p_generator) {
       p_generator->begin(audioInfo());
     }
@@ -169,6 +170,7 @@ class RTTTLOutput : public AudioOutput {
     ring_buffer.writeArray(const_cast<uint8_t*>(data), len);
     // If we haven't started yet and we find a ':', we need to call begin()
     if (!is_start && find_byte(data, len, ':') >= 0) {
+      LOGI("found ':' - resetting parser state by calling begin()");
       begin();
     }
     // start parsing of new rtttl string
@@ -207,11 +209,11 @@ class RTTTLOutput : public AudioOutput {
   bool is_start = true;
   char m_actual = 0;
   char m_prec = 0;
-  Str m_title{100};
-  int m_octave{4};
-  int m_duration{4};
-  int m_bpm{120};
-  float m_msec_semi{750};
+  Str m_title{40};
+  int m_octave = 4;
+  int m_duration = 4;
+  int m_bpm = 120;
+  float m_msec_semi = 750;
   void* reference = nullptr;
   std::function<void(float, int, int, void*)> noteCallback;