109 lines
2.9 KiB
C++
109 lines
2.9 KiB
C++
#include "ampmanager.h"
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AmpManager::AmpManager(Microcontroller *micro, int relayNumber, QAudioDeviceInfo device, QObject *parent) : QObject(parent), _micro(micro), _relayNumber(relayNumber)
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{
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/* Open PCM device for recording (capture). */
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rc = snd_pcm_open(&handle, "default", SND_PCM_STREAM_CAPTURE, 0);
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if (rc < 0) {
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fprintf(stderr, "unable to open pcm device: %s\n", snd_strerror(rc));
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exit(1);
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}
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/* Allocate a hardware parameters object. */
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snd_pcm_hw_params_alloca(¶ms);
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/* Fill it in with default values. */
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snd_pcm_hw_params_any(handle, params);
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/* Set the desired hardware parameters. */
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/* Interleaved mode */
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snd_pcm_hw_params_set_access(handle, params, SND_PCM_ACCESS_RW_INTERLEAVED);
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/* Signed 16-bit little-endian format */
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snd_pcm_hw_params_set_format(handle, params, SND_PCM_FORMAT_S16_LE);
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s
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/* One channel (mono) */
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snd_pcm_hw_params_set_channels(handle, params, 1);
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/* 16000 bits/second sampling rate */
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val = 16000;
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snd_pcm_hw_params_set_rate_near(handle, params, &val, &dir);
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/* Set period size to 2048 frames. */
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frames = 2048;
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snd_pcm_hw_params_set_period_size_near(handle, params, &frames, &dir);
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/* Write the parameters to the driver */
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rc = snd_pcm_hw_params(handle, params);
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if (rc < 0) {
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fprintf(stderr, "unable to set hw parameters: %s\n", snd_strerror(rc));
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exit(1);
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}
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/* Use a buffer large enough to hold one period */
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snd_pcm_hw_params_get_period_size(params, &frames, &dir);
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size = frames * 2; /* 2 bytes/sample, 1 channels */
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char* buffer = new char[size]();
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}
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AmpManager::~AmpManager()
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{
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abort();
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snd_pcm_drain(handle);
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snd_pcm_close(handle);
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}
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void AmpManager::run()
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{
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abort();
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_ioDevice = _audioDevice->start();
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loop.reset(new QEventLoop);
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QTimer timer;
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connect(&timer, SIGNAL(timeout()), this, SLOT(doTick()));
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timer.setInterval(500);
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timer.start();
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qDebug()<<"Start Auto Amp Manager\n";
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_micro->relayOn(_relayNumber);
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relayState = true;
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loop->exec();
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}
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void AmpManager::abort()
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{
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if (!loop.isNull())loop->quit();
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if(_audioDevice->error() == 0)_audioDevice->stop();
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if(_ioDevice != nullptr)delete _ioDevice;
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qDebug()<<"Stop Auto Amp Manager\n";
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}
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void AmpManager::doTick()
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{
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if(_audioDevice->error() == 0 && _ioDevice != nullptr)
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{
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QByteArray buffer = _ioDevice->readAll();
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for(long i = 0; i < buffer.size(); i++)
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{
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if((uint8_t) buffer.at(i) != 128)
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{
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silenceCount = 0;
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}
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}
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if(silenceCount > 40 && relayState)
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{
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std::cout<<"Auto off Amp\n";
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_micro->relayOff(_relayNumber);
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relayState = false;
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}
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else if(silenceCount == 0 && !relayState)
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{
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std::cout<<"Auto on Amp\n";
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_micro->relayOn(_relayNumber);
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relayState = true;
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}
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silenceCount++;
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}
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}
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