Remove AutoCenter from AnalogAudioStream examples

Author: pschatzmann

examples/examples-basic-api/base-adc-a2dp/base-adc-a2dp.ino

@@ -18,15 +18,12 @@
 
 AnalogAudioStream adc;
 BluetoothA2DPSource a2dp_source;
-// The data has a center of around 26427, so we we need to shift it down to bring the center to 0
-ConverterScaler<int16_t> scaler(1.0, -26427, 32700 );
 
 // callback used by A2DP to provide the sound data
 int32_t get_sound_data(Frame* frames, int32_t frameCount) {
     uint8_t *data = (uint8_t*)frames;
     int frameSize = 4;
     size_t resultBytes = adc.readBytes(data, frameCount*frameSize);   
-    scaler.convert(data, resultBytes);
     return resultBytes/frameSize;
 }
 

examples/examples-stream/streams-adc-i2s/streams-adc-i2s.ino

@@ -13,7 +13,6 @@ AudioInfo info(44100, 2, 16);
 AnalogAudioStream in; 
 I2SStream out;                        
 StreamCopy copier(out, in); // copy in to out
-ConverterAutoCenter converter(info);
 
 // Arduino Setup
 void setup(void) {
@@ -34,5 +33,5 @@ void setup(void) {
 
 // Arduino loop - copy data 
 void loop() {
-  copier.copy(converter);
+  copier.copy();
 }

examples/examples-stream/streams-memory_mp3-analog/streams-memory_mp3-analog.ino

@@ -1,7 +1,7 @@
 /**
- * @file stream-memory_mp3-analog.ino
+ * @file stream-memory_mp3-out.ino
  * @author Phil Schatzmann
- * @brief decode MP3 stream and output as analog signal
+ * @brief decode MP3 stream and output as out signal
  * @version 0.1
  * @date 2021-01-24
  * 
@@ -17,20 +17,20 @@
 
 
 MemoryStream mp3(BabyElephantWalk60_mp3, BabyElephantWalk60_mp3_len);
-AnalogAudioStream analog;  // Analog output 
-EncodedAudioStream out(&analog, new MP3DecoderHelix()); // output to decoder
-StreamCopy copier(out, mp3);    // copy in to analog
+AnalogAudioStream out;  // Analog output 
+EncodedAudioStream out(&out, new MP3DecoderHelix()); // output to decoder
+StreamCopy copier(out, mp3);    // copy in to out
 
 void setup(){
   Serial.begin(115200);
   AudioLogger::instance().begin(Serial, AudioLogger::Info);  
 
   // update audio info with info from decoder
-  out.setNotifyAudioChange(analog);
+  out.setNotifyAudioChange(out);
 
   // begin processing
-  auto cfg = analog.defaultConfig();
-  analog.begin(cfg);
+  auto cfg = out.defaultConfig();
+  out.begin(cfg);
 
   out.begin();
 }
@@ -42,7 +42,7 @@ void loop(){
     auto info = out.decoder().audioInfo();
     LOGI("The audio rate from the mp3 file is %d", info.sample_rate);
     LOGI("The channels from the mp3 file is %d", info.channels);
-    analog.end();
+    out.end();
     stop();
   }
 }

examples/examples-stream/streams-url_mp3-analog/streams-url_mp3-analog.ino

@@ -1,5 +1,5 @@
 /**
- * @file streams-url_mp3-analog.ino
+ * @file streams-url_mp3-out.ino
  * @author Phil Schatzmann
  * @brief decode MP3 stream from url and output it on I2S
  * @version 0.1
@@ -15,21 +15,21 @@
 
 
 URLStream url("ssid","password");
-AnalogAudioStream analog; // final output of decoded stream
-EncodedAudioStream dec(&analog, new MP3DecoderHelix()); // Decoding stream
+AnalogAudioStream out; // final output of decoded stream
+EncodedAudioStream dec(&out, new MP3DecoderHelix()); // Decoding stream
 StreamCopy copier(dec, url); // copy url to decoder
 
 
 void setup(){
   Serial.begin(115200);
   AudioLogger::instance().begin(Serial, AudioLogger::Info);  
 
-  // setup analog
-  auto config = analog.defaultConfig(TX_MODE);
-  analog.begin(config);
+  // setup out
+  auto config = out.defaultConfig(TX_MODE);
+  out.begin(config);
 
   // setup I2S based on sampling rate provided by decoder
-  dec.setNotifyAudioChange(analog);
+  dec.setNotifyAudioChange(out);
   dec.begin();
 
 // mp3 radio