vban support

examples/examples-communication/vban/streams-audiokit-vban/streams-audiokit-vban

@@ -0,0 +1,47 @@
+/**
+ * @file streams-i2s-vban.ino
+ * @author Phil Schatzmann
+ * @brief sends signal from i2s (using an AudioKit) to VBAN Receptor App 
+ */
+
+#include "AudioTools.h"
+#include "AudioLibs/VBANStream.h"
+#include "AudioLibs/AudioKit.h" // comment out when not using AudioKit
+
+AudioInfo info(44100, 2, 16);
+AudioKitStream in;  // Audio source e.g. replace with I2SStream
+VBANStream out;
+StreamCopy copier(out, in, 2048);                             // copies sound into i2s
+
+// Arduino Setup
+void setup(void) {  
+  // Open Serial 
+  Serial.begin(115200);
+  while(!Serial);
+  AudioLogger::instance().begin(Serial, AudioLogger::Info);
+
+  // setup output
+  auto cfg = out.defaultConfig(TX_MODE);
+  cfg.copyFrom(info);
+  cfg.ssid = "ssid";
+  cfg.password = "password";
+  cfg.stream_name = "Stream1";
+  cfg.target_ip = IPAddress{192,168,1,37}; // comment out to broadcast
+  cfg.throttle_active = false; // generator is much too fast, we need to stall
+  if (!out.begin(cfg)) stop();
+
+  // Setup input from mic 
+  // setup input
+  auto cfg_in = in.defaultConfig(RX_MODE);
+  cfg_in.sd_active = false;
+  cfg_in.buffer_size = 256;
+  cfg_in.buffer_count = 4;
+  cfg_in.copyFrom(info);
+  cfg_in.input_device = AUDIO_HAL_ADC_INPUT_LINE2; // microphone
+  in.begin(cfg_in);
+}
+
+// Arduino loop - copy sound to out 
+void loop() {
+  copier.copy();
+}

examples/examples-communication/vban/streams-generator-vban/streams-generator-vban.ino

@@ -0,0 +1,42 @@
+/**
+ * @file streams-generator-vban.ino
+ * @author Phil Schatzmann
+ * @brief sends sine test signal to VBAN Receptor App
+ */
+
+#include "AudioTools.h"
+#include "AudioLibs/VBANStream.h"
+
+AudioInfo info(44100, 2, 16);
+SineWaveGenerator<int16_t> sineWave(32000);                // subclass of SoundGenerator with max amplitude of 32000
+GeneratedSoundStream<int16_t> sound(sineWave);             // Stream generated from sine wave
+VBANStream out;
+StreamCopy copier(out, sound, 2048);                       // 44100 needs 2048
+
+// Arduino Setup
+void setup(void) {  
+  // Open Serial 
+  Serial.begin(115200);
+  while(!Serial);
+  AudioLogger::instance().begin(Serial, AudioLogger::Info);
+
+  // setup output
+  auto cfg = out.defaultConfig(TX_MODE);
+  cfg.copyFrom(info);
+  cfg.ssid = "ssid";
+  cfg.password = "password";
+  cfg.stream_name = "Stream1";
+  cfg.target_ip = IPAddress{192,168,1,37}; 
+  cfg.throttle_active = true;
+  cfg.throttle_correction_ms = -4; // optimize overload and underrun
+  if (!out.begin(cfg)) stop();
+
+  // Setup sine wave
+  sineWave.begin(info, N_B4);
+  Serial.println("started...");
+}
+
+// Arduino loop - copy sound to out 
+void loop() {
+  copier.copy();
+}

src/AudioLibs/Communication.h

@@ -780,6 +780,7 @@ class Throttle {
     int durationMsEff = millis() - start_time;
     int durationToBe = (samples * 1000) / info.sample_rate;
     int waitMs = durationToBe - durationMsEff + info.correction_ms;
+    LOGI("wait: %d", waitMs);
     if (waitMs > 0) {
       delay(waitMs);
     }