cleanup experiments

Author: pschatzmann

examples/build-arch.sh

@@ -26,6 +26,7 @@ compile_example "esp8266:esp8266:generic"
 compile_example "arduino:mbed_rp2040:pico" 
 compile_example "rp2040:rp2040:generic" 
 compile_example "arduino:avr:nano" 
+compile_example "arduino:samd:arduino_zero_native"
 #compile_example "STMicroelectronics:stm32:GenF4" 
 
 ./cleanup.sh

src/AudioCodecs/CodecBase64.h

@@ -117,14 +117,14 @@ class DecoderBase64 : public AudioDecoder {
     memset(result.data(), 0, result.size());
 
     for (size_t i = 0, j = 0; i < L; i += 4) {
-      int n = B64index[p[i]] << 18 | B64index[p[i + 1]] << 12 |
+      int32_t n = static_cast<int32_t>(B64index[p[i]]) << 18 | B64index[p[i + 1]] << 12 |
               B64index[p[i + 2]] << 6 | B64index[p[i + 3]];
       result[j++] = n >> 16;
       result[j++] = n >> 8 & 0xFF;
       result[j++] = n & 0xFF;
     }
     if (pad) {
-      int n = B64index[p[L]] << 18 | B64index[p[L + 1]] << 12;
+      int32_t n = static_cast<int32_t>(B64index[p[L]]) << 18 | B64index[p[L + 1]] << 12;
       result[result.size() - 1] = n >> 16;
 
       if (len > L + 2 && p[L + 2] != '=') {

src/AudioConfig.h

@@ -472,6 +472,14 @@ using WiFiServerSecure = BearSSL::WiFiServerSecure;
 #define NO_TRACED
 #define NO_TRACEI
 
+// we use  spi to emulate i2s
+#define PIN_I2S_BCK 13
+#define PIN_I2S_WS 10 
+#define PIN_I2S_DATA_IN 12
+#define PIN_I2S_DATA_OUT 11
+#define PIN_I2S_MUTE -1
+
+
 #endif
 
 //---- STM32 ------------

src/AudioTools/Buffers.h

@@ -195,6 +195,7 @@ class SingleBuffer : public BaseBuffer<T> {
   bool isFull() { return availableForWrite() <= 0; }
 
   T *address() { return buffer.data(); }
+  T *data() { return buffer.data(); }
 
   void reset() {
     current_read_pos = 0;