snapshot

libraries/audio-tools/examples/examples-communication/vban/player-sdmmc-vban/player-sdmmc-vban.ino

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+/**
+ * @file player-sdmmc-vban.ino
+ * @author Phil Schatzmann
+ * @brief decodes mp3 to vban: We need to use a queue to prevent delays to get too big.
+ * We try to keep the queue filled, so that we can always provide pcm data to vban 
+ */
+
+#include "AudioTools.h"
+#include "AudioTools/AudioCodecs/CodecMP3Helix.h"
+#include "AudioTools/Communication/VBANStream.h"
+#include "AudioTools/Disk/AudioSourceSDMMC.h" // or AudioSourceIdxSDMMC.h
+
+const char *startFilePath="/";
+const char* ext="mp3";
+const int mp3_pcm_size = 14000;
+AudioInfo info(44100,2,16);
+AudioSourceSDMMC source(startFilePath, ext);
+RingBuffer<uint8_t> ring_buffer(mp3_pcm_size*3);
+QueueStream<uint8_t> queue(ring_buffer);
+MP3DecoderHelix decoder;  // or change to MP3DecoderMAD
+AudioPlayer player(source, queue, decoder);
+
+VBANStream out;
+StreamCopy copier(out, queue, 2048); // 44100 needs 2048
+
+
+void fillQueue(){
+  // fill queue when smaller then limit
+  if(ring_buffer.availableForWrite() >= mp3_pcm_size){
+    player.copy();
+    // activate copy when limit is reached
+    if (!copier.isActive() && ring_buffer.available()>=23000){
+      copier.setActive(true);
+      LOGI("copier active");
+    }
+  }
+  LOGI("available: %d - avail to write: %d", ring_buffer.available(), ring_buffer.availableForWrite());
+}
+
+
+void setup() {
+  Serial.begin(115200);
+  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Warning);
+
+  // 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_us = 0;
+  if (!out.begin(cfg)) stop();
+
+  // setup player
+  player.setVolume(0.7);
+  player.begin();
+
+  // select file with setPath() or setIndex()
+  //player.setPath("/ZZ Top/Unknown Album/Lowrider.mp3");
+  //player.setIndex(1); // 2nd file
+
+  queue.begin(); // start queue
+  copier.setActive(false); // deactivate copy
+
+}
+
+void loop() {
+  fillQueue();
+  // output from queue
+  copier.copy();
+}

libraries/audio-tools/examples/examples-communication/vban/streams-audiokit-vban/streams-audiokit-vban.ino

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+/**
+ * @file streams-i2s-vban.ino
+ * @author Phil Schatzmann
+ * @brief sends signal from i2s (using an AudioKit) to VBAN Receptor App 
+ */
+
+#include "AudioTools.h"
+#include "AudioTools/Communication/VBANStream.h"
+#include "AudioTools/AudioLibs/AudioBoardStream.h" // comment out when not using AudioKit
+
+AudioInfo info(44100, 2, 16);
+AudioBoardStream in(AudioKitEs8388V1);  // 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);
+  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::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 = ADC_INPUT_LINE2; // microphone
+  in.begin(cfg_in);
+}
+
+// Arduino loop - copy sound to out 
+void loop() {
+  copier.copy();
+}

libraries/audio-tools/examples/examples-communication/vban/streams-generator-vban/streams-generator-vban.ino

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+/**
+ * @file streams-generator-vban.ino
+ * @author Phil Schatzmann
+ * @brief sends sine test signal to VBAN Receptor App
+ */
+ 
+#include "AudioTools.h"
+#include "AudioTools/Communication/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);
+  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::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_us = 0; // 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();
+}

libraries/audio-tools/examples/examples-communication/vban/streams-vban-audiokit/streams-vban-audiokit.ino

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+/**
+ * @file streams-i2s-vban.ino
+ * @author Phil Schatzmann
+ * @brief sends signal from i2s (using an AudioKit) to VBAN Receptor App 
+ */
+
+#include "AudioTools.h"
+#include "AudioTools/Communication/VBANStream.h"
+#include "AudioTools/AudioLibs/AudioBoardStream.h" // comment out when not using AudioKit
+
+AudioBoardStream out(AudioKitEs8388V1);  // Audio source e.g. replace with I2SStream
+VBANStream in;
+StreamCopy copier(out, in);              // copies sound into i2s
+
+// Arduino Setup
+void setup(void) {  
+  // Open Serial 
+  Serial.begin(115200);
+  while(!Serial);
+  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);
+
+  // setup output
+  auto cfg_out = out.defaultConfig(TX_MODE);
+  if (!out.begin(cfg_out)) stop();
+
+  // format changes in vban must change the output as well
+  in.addNotifyAudioChange(out);
+
+  // setup input from vban
+  auto cfg_in = in.defaultConfig(RX_MODE);
+  cfg_in.ssid = "ssid";
+  cfg_in.password = "password";
+  cfg_in.stream_name = "Talkie";
+
+  // set parameters for reply to discovery VBAN PING0 packet (So the voicemeter can correctly identify your device)
+  //cfg_in.device_flags = 0x00000001; //reciever only
+  //cfg_in.bitfeature = 0x00000001;  // audio only
+  //cfg_in.device_color = 0x00FF00;
+  //cfg_in.device_name = nullptr; // or "MyDeviceName" if empty replaced with MAC 
+  //cfg_in.manufacturer_name = "Your Name";
+  //cfg_in.application_name = "Your App Name";
+  //cfg_in.host_name = nullptr; // if empty replaced with hostname
+  //cfg_in.user_name = "User";
+  //cfg_in.user_comment = "ESP32 VBAN Audio Device"; //bascially anything goes - just keep under 64 bytes see VBAN docs for more
+
+  in.begin(cfg_in);
+}
+
+// Arduino loop - copy sound to out 
+void loop() {
+  copier.copy();
+}