84 lines
2.0 KiB
C++
84 lines
2.0 KiB
C++
/**
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* @file communication-container-binary-meta.ino
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* @author Phil Schatzmann
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* @brief generate sine wave -> encoder -> decoder -> audiokit (i2s)
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* We demonstrate how to pass any type of metadata from the encoder to the
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* decoder
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* @version 0.1
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* @date 2023-05-18
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*
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* @copyright Copyright (c) 2022
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*
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*/
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#include "AudioTools.h"
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#include "AudioTools/AudioCodecs/CodecOpus.h"
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#include "AudioTools/AudioCodecs/ContainerBinary.h"
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#include "AudioTools/AudioLibs/AudioBoardStream.h"
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struct MetaData {
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MetaData(const char* typeArg, float vol) {
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volume = vol;
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strncpy(type, typeArg, 5);
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}
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MetaData(MetaData* data) {
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volume = data->volume;
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strncpy(type, data->type, 5);
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}
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void log() {
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Serial.print("====> ");
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Serial.print(type);
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Serial.print(": volume ");
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Serial.println(volume);
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}
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protected:
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float volume;
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char type[5];
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};
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void metaCallback(uint8_t* data, int len, void*ref) {
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assert(sizeof(MetaData)==len);
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MetaData meta((MetaData*)data);
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meta.log();
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}
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AudioInfo info(8000, 1, 16);
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SineWaveGenerator<int16_t> sineWave(32000);
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GeneratedSoundStream<int16_t> sound(sineWave);
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AudioBoardStream out(AudioKitEs8388V1);
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BinaryContainerDecoder cont_dec(new OpusAudioDecoder());
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BinaryContainerEncoder cont_enc(new OpusAudioEncoder());
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EncodedAudioStream decoder(&out, &cont_dec);
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EncodedAudioStream encoder(&decoder, &cont_enc);StreamCopy copier(encoder, sound);
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MetaData meta{"opus", 0.5};
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void setup() {
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Serial.begin(115200);
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AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Warning);
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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 decoder
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decoder.begin(info);
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// start encoder
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encoder.begin(info);
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// receive meta data
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cont_dec.setMetaCallback(metaCallback);
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// write meta data
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cont_enc.writeMeta((const uint8_t*)&meta, sizeof(MetaData));
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Serial.println("Test started...");
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}
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void loop() { copier.copy(); } |