snapshot

libraries/audio-tools/tests-cmake/codec/wav/wav.cpp

@@ -0,0 +1,63 @@
+/**
+ * @file test-codec-adpcm.ino
+ * @author Phil Schatzmann
+ * @brief generate sine wave -> encoder -> decoder -> PortAudioStream
+ * We can select between PCM and ADPCM
+ * @version 0.1
+ * @date 2022-04-30
+ * 
+ * @copyright Copyright (c) 2022
+ * 
+ */
+#include "AudioTools.h"
+#include "AudioTools/AudioCodecs/CodecWAV.h" 
+#include "AudioTools/AudioCodecs/CodecADPCM.h"
+#include "AudioTools/AudioLibs/PortAudioStream.h"
+
+#define USE_ADPCM true
+
+AudioInfo info(16000, 2, 16);
+SineWaveGenerator<int16_t> sineWave( 32000);  // subclass of SoundGenerator with max amplitude of 32000
+GeneratedSoundStream<int16_t> sound( sineWave); // Stream generated from sine wave
+//I2SStream out; 
+//PortAudioStream out; 
+CsvOutput<int16_t> out(Serial);
+#if USE_ADPCM
+ADPCMDecoder adpcm_decoder(AV_CODEC_ID_ADPCM_IMA_WAV); 
+ADPCMEncoder adpcm_encoder(AV_CODEC_ID_ADPCM_IMA_WAV); 
+EncodedAudioStream decoder(&out, new WAVDecoder(adpcm_decoder, AudioFormat::ADPCM)); // encode and write
+EncodedAudioStream encoder(&decoder, new WAVEncoder(adpcm_encoder, AudioFormat::ADPCM)); // encode and write
+#else
+EncodedAudioStream decoder(&out, new WAVDecoder()); // encode and write
+EncodedAudioStream encoder(&decoder, new WAVEncoder()); // encode and write
+#endif
+StreamCopy copier(encoder, sound);     
+
+void setup() {
+  Serial.begin(115200);
+  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Debug);
+
+  // start I2S
+  Serial.println("starting Output...");
+  auto cfgi = out.defaultConfig(TX_MODE);
+  cfgi.copyFrom(info);
+  out.begin(cfgi);
+
+  // Setup sine wave
+  auto cfgs = sineWave.defaultConfig();
+  cfgs.copyFrom(info);
+  sineWave.begin(info, N_B4);
+
+  // start decoder
+  decoder.begin(info);
+
+  // start encoder
+  encoder.begin(info);
+
+  Serial.println("Test started...");
+}
+
+
+void loop() { 
+  copier.copy();
+}