fork from github

2021-09-27 11:00:34 +02:00
commit 64ecf18a03
555 changed files with 266880 additions and 0 deletions
--- a/examples/PlayFLAC-SD-SPDIF/PlayFLAC-SD-SPDIF.ino
+++ b/examples/PlayFLAC-SD-SPDIF/PlayFLAC-SD-SPDIF.ino
@@ -0,0 +1,68 @@
+#include <Arduino.h>
+#include "AudioFileSourceSD.h"
+#include "AudioOutputSPDIF.h"
+#include "AudioGeneratorFLAC.h"
+
+// For this sketch, you need connected SD card with '.flac' music files in the root
+// directory. Some samples with various sampling rates are available from i.e. 
+// Espressif Audio Development Framework at:
+// https://docs.espressif.com/projects/esp-adf/en/latest/design-guide/audio-samples.html
+//
+// On ESP8266 you might need to reencode FLAC files with max '-2' compression level 
+// (i.e. 1152 maximum block size) or you will run out of memory. FLAC files will be 
+// slightly bigger but you don't loose audio quality with reencoding (lossles codec).
+
+// You may need a fast SD card. Set this as high as it will work (40MHz max).
+#define SPI_SPEED SD_SCK_MHZ(40)
+
+// On ESP32 you can adjust the SPDIF_OUT_PIN (GPIO number). 
+// On ESP8266 it is fixed to GPIO3/RX0 and this setting has no effect
+#define SPDIF_OUT_PIN 27
+
+File dir;
+AudioFileSourceSD *source = NULL;
+AudioOutputSPDIF *output = NULL;
+AudioGeneratorFLAC *decoder = NULL;
+
+void setup() {
+  Serial.begin(115200);
+  Serial.println();
+  delay(1000);
+
+  audioLogger = &Serial;  
+  source = new AudioFileSourceSD();
+  output = new AudioOutputSPDIF(SPDIF_OUT_PIN);
+  decoder = new AudioGeneratorFLAC();
+
+  // NOTE: SD.begin(...) should be called AFTER AudioOutputSPDIF() 
+  //       to takover the the SPI pins if they share some with I2S
+  //       (i.e. D8 on Wemos D1 mini is both I2S BCK and SPI SS)
+  #if defined(ESP8266)
+    SD.begin(SS, SPI_SPEED);
+  #else
+    SD.begin();
+  #endif
+  dir = SD.open("/"); 
+}
+
+void loop() {
+  if ((decoder) && (decoder->isRunning())) {
+    if (!decoder->loop()) decoder->stop();
+  } else {
+    File file = dir.openNextFile();
+    if (file) {      
+      if (String(file.name()).endsWith(".flac")) {
+        source->close();
+        if (source->open(file.name())) { 
+          Serial.printf_P(PSTR("Playing '%s' from SD card...\n"), file.name());
+          decoder->begin(source, output);
+        } else {
+          Serial.printf_P(PSTR("Error opening '%s'\n"), file.name());
+        }
+      } 
+    } else {
+      Serial.println(F("Playback form SD card done\n"));
+      delay(1000);
+    }       
+  }
+}