PWMAudioOutput: provide audioInfoOut()

Author: pschatzmann

src/AudioTools/CoreAudio/AudioPWM/AudioPWM.h

@@ -36,6 +36,7 @@ class PWMAudioOutput : public AudioOutput {
   /// updates the sample rate dynamically
   virtual void setAudioInfo(AudioInfo info) {
     TRACEI();
+    AudioOutput::cfg = info;
     PWMConfig cfg = audio_config;
     if (cfg.sample_rate != info.sample_rate || cfg.channels != info.channels ||
         cfg.bits_per_sample != info.bits_per_sample) {
@@ -48,6 +49,12 @@ class PWMAudioOutput : public AudioOutput {
     }
   }
 
+  AudioInfo audioInfoOut() override {
+    AudioInfo result = audioInfo();
+    result.sample_rate = pwm.effectiveOutputSampleRate();
+    return result;
+  }
+
   /// starts the processing using Streams
   bool begin(PWMConfig config) {
     TRACED();

src/AudioTools/CoreAudio/AudioPWM/PWMAudioBase.h

@@ -232,6 +232,11 @@ class DriverPWMBase {
   /// on the heap and will be cleaned up by this class
   void setBuffer(BaseBuffer<uint8_t> *buffer) { this->buffer = buffer; }
 
+  /// Provides the effective sample rate
+  virtual int effectiveOutputSampleRate() {
+    return audio_config.sample_rate / decimation();
+  }
+
  protected:
   PWMConfig audio_config;
   AudioInfo actual_info;
@@ -326,11 +331,6 @@ class DriverPWMBase {
     return audio_config.sample_rate >= ANALOG_MAX_SAMPLE_RATE;
   }
 
-  /// Provides the effective sample rate
-  virtual int effectiveOutputSampleRate() {
-    return audio_config.sample_rate / decimation();
-  }
-
   /// Decimation factor to reduce the sample rate
   virtual int decimation() { 
     if (decimation_factor == 0){