61 lines
1.7 KiB
C++
61 lines
1.7 KiB
C++
/**
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* @file test-codec-alac.ino
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* @author Phil Schatzmann
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* @brief generate sine wave -> encoder -> decoder -> audiokit (i2s)
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* @note Activate PSRAM or dicrease the frame size e.g. by adding 1024 to the constructor of the enc_alac and dec_alac
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* @version 0.1
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*
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* @copyright Copyright (c) 2025
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*
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*/
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#include "AudioTools.h"
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#include "AudioTools/AudioCodecs/CodecALAC.h"
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#include "AudioTools/AudioLibs/AudioBoardStream.h"
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// SET_LOOP_TASK_STACK_SIZE(16*1024); // 16KB - not needed
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AudioInfo info(44100, 2, 16);
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SineWaveGenerator<int16_t> sineWave( 32000); // subclass of SoundGenerator with max amplitude of 32000
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GeneratedSoundStream<int16_t> sound( sineWave); // Stream generated from sine wave
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AudioBoardStream out(AudioKitEs8388V1);
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//I2SStream out;
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//CsvOutput<int16_t> out(Serial);
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EncoderALAC enc_alac;
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DecoderALAC dec_alac;
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CodecNOP dec_nop;
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EncodedAudioStream decoder(&out, &dec_alac); // encode and write
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EncodedAudioStream encoder(&decoder, &enc_alac); // encode and write
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StreamCopy copier(encoder, sound);
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void setup() {
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Serial.begin(115200);
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AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Debug);
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// start I2S
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Serial.println("starting I2S...");
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auto cfgi = out.defaultConfig(TX_MODE);
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cfgi.copyFrom(info);
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out.begin(cfgi);
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// Setup sine wave
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sineWave.begin(info, N_B4);
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// start encoder
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encoder.begin(info);
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// start decoder
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decoder.begin(info);
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// optionally copy config from encoder to decoder
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// since decoder already has audio info and frames
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// dec_alac.setCodecConfig(enc_alac.config());
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// dec_alac.setCodecConfig(enc_alac.binaryConfig());
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Serial.println("Test started...");
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}
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void loop() {
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copier.copy();
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}
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