esp32 i2s: mclk_multiple

Author: pschatzmann

src/AudioI2S/I2SConfigESP32V1.h

@@ -67,6 +67,8 @@ class I2SConfigESP32V1 : public AudioInfo {
     bool use_apll = I2S_USE_APLL; 
     /// Select left or right channel when channels == 1
     I2SChannelSelect channel_format = I2SChannelSelect::Default;
+    /// masterclock multiple (-1 = use default)
+    int mclk_multiple = -1;
 
     void logInfo(const char* source="") {
       AudioInfo::logInfo(source);

src/AudioI2S/I2SESP32V1.h

@@ -208,6 +208,9 @@ class I2SDriverESP32V1 {
         // mclk_multiple' should be the multiple of 3 while using 24-bit
         clk_cfg.mclk_multiple = I2S_MCLK_MULTIPLE_384;
       }
+      if (cfg.mclk_multiple > 0){
+        clk_cfg.mclk_multiple = cfg.mclk_multiple;
+      } 
       return clk_cfg;
     }