Fix Audio player issue.

Wrong Audo.begin preBufferSize (default 1024).
As write gave a buffer of 1024 nothing was written.

Signed-off-by: Frederic.Pillon <frederic.pillon@st.com>

Author: fpistm

libraries/Audio/example/SimpleAudioPlayer/SimpleAudioPlayer.ino

@@ -49,7 +49,6 @@ void loop() {
   WAVE_FormatTypeDef WaveFormat;
   const int S = 1024; // Number of samples to read in block
   uint32_t buffer[S];
-  int duration;
   delay(1000);        // delay for console
 
   File myFile = SD.open(recFile);
@@ -68,7 +67,7 @@ void loop() {
   delay(1000);
   SerialUSB.println("Starting Playback");
   delay(1000);
-  Audio.begin(WaveFormat.SampleRate, 100);
+  Audio.begin(WaveFormat.SampleRate);
 
   delay(1000);
 

libraries/Audio/src/Audio.cpp

@@ -140,7 +140,7 @@ size_t AudioClass::write(const uint32_t *data, size_t size) {
 	if (!audio_out_init) return 0;
 
 	if (size > (bufferOutSize / 2))
-		return size;
+		return 0;
 
     /* Not running yet, need to fill-in full FIFO */
 	if (running == NULL) {