71 lines
1.5 KiB
C++
71 lines
1.5 KiB
C++
/**
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* @file player-sd-callback.ino
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* @brief see https://github.com/pschatzmann/arduino-audio-tools/blob/main/examples/examples-player/player-callback-i2s/README.md
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*
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* @author Phil Schatzmann
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* @copyright GPLv3
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*/
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// Install https://github.com/pschatzmann/arduino-libhelix.git
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#include "Arduino.h"
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#include "AudioTools.h"
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#include "AudioTools/AudioCodecs/CodecMP3Helix.h"
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#include <SPI.h>
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#include <SD.h>
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// forward declarations
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void callbackInit();
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Stream* callbackNextStream(int offset);
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// data
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const int chipSelect=PIN_CS;
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AudioSourceCallback source(callbackNextStream, callbackInit);
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I2SStream i2s;
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MP3DecoderHelix decoder;
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AudioPlayer player(source, i2s, decoder);
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File audioFile;
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File dir;
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void callbackInit() {
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// make sure that the directory contains only mp3 files
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dir = SD.open("/TomWaits");
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}
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Stream* callbackNextStream(int offset) {
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audioFile.close();
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// the next files must be a mp3 file
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for (int j=0;j<offset;j++)
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audioFile = dir.openNextFile();
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return &audioFile;
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}
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void callbackPrintMetaData(MetaDataType type, const char* str, int len){
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Serial.print("==> ");
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Serial.print(toStr(type));
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Serial.print(": ");
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Serial.println(str);
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}
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void setup() {
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Serial.begin(115200);
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AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);
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// setup SD
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SD.begin(chipSelect);
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// setup output
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auto cfg = i2s.defaultConfig(TX_MODE);
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i2s.begin(cfg);
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// setup player
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player.setMetadataCallback(callbackPrintMetaData);
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player.begin();
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}
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void loop() {
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player.copy();
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} |