57 lines
1.5 KiB
C++
57 lines
1.5 KiB
C++
#include <Arduino.h>
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#include <AudioTools.h>
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#include <AudioTools/AudioCodecs/CodecOpus.h>
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using namespace audio_tools;
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constexpr int I2S_BCLK = 6;
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constexpr int I2S_LRC = 7;
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constexpr int I2S_DIN = 5;
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// Keep the test intentionally light so it is realistic for an ESP32-C3.
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AudioInfo audioInfo(16000, 1, 16);
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SineWaveGenerator<int16_t> sineWave(10000);
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GeneratedSoundStream<int16_t> source(sineWave);
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I2SStream i2s;
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OpusAudioEncoder opusEncoder;
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OpusAudioDecoder opusDecoder;
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EncodedAudioStream decodedAudio(&i2s, &opusDecoder);
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EncodedAudioStream encodedAudio(&decodedAudio, &opusEncoder);
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StreamCopy copier(encodedAudio, source);
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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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auto i2sConfig = i2s.defaultConfig(TX_MODE);
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i2sConfig.copyFrom(audioInfo);
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i2sConfig.pin_bck = I2S_BCLK;
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i2sConfig.pin_ws = I2S_LRC;
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i2sConfig.pin_data = I2S_DIN;
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i2sConfig.buffer_count = 8;
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i2sConfig.buffer_size = 256;
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i2s.begin(i2sConfig);
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auto sineConfig = sineWave.defaultConfig();
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sineConfig.copyFrom(audioInfo);
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sineWave.begin(sineConfig, N_B4);
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auto &encoderConfig = opusEncoder.config();
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encoderConfig.copyFrom(audioInfo);
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encoderConfig.application = OPUS_APPLICATION_RESTRICTED_LOWDELAY;
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encoderConfig.bitrate = 24000;
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encoderConfig.complexity = 1;
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encoderConfig.frame_sizes_ms_x2 = OPUS_FRAMESIZE_20_MS;
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decodedAudio.begin(audioInfo);
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encodedAudio.begin(audioInfo);
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Serial.println("Opus loopback test started");
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}
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void loop() {
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if (copier.copy() == 0) {
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delay(1);
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}
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}
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