kopia lustrzana https://github.com/f4exb/sdrangel
96 wiersze
2.0 KiB
C++
96 wiersze
2.0 KiB
C++
/* (C)2015 John Greb
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*
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* Funcube Dongle command line interface
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* Copyright 2011 David Pello EA1IDZ
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* Copyright 2011 Pieter-Tjerk de Boer PA3FWM
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* Copyright 2012-2014 Alexandru Csete OZ9AEC
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public Licence version 3.
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*/
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#include "fcdinput.h"
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#include "fcdthread.h"
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#include "qthid.h"
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bool FCDThread::OpenSource(const char* cardname)
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{
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bool fail = false;
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snd_pcm_hw_params_t* params;
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//fcd_rate = FCDPP_RATE;
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//fcd_channels =2;
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//fcd_format = SND_PCM_SFMT_U16_LE;
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snd_pcm_stream_t fcd_stream = SND_PCM_STREAM_CAPTURE;
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if (fcd_handle)
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return false;
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if ( snd_pcm_open( &fcd_handle, cardname, fcd_stream, 0 ) < 0 )
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return false;
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snd_pcm_hw_params_alloca(¶ms);
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if ( snd_pcm_hw_params_any(fcd_handle, params) < 0 )
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fail = true;
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else if ( snd_pcm_hw_params(fcd_handle, params) < 0 ) {
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fail = true;
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// TODO: check actual samplerate, may be crippled firmware
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} else {
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if ( snd_pcm_start(fcd_handle) < 0 )
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fail = true;
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}
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if (fail) {
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qCritical("Funcube Dongle stream start failed");
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snd_pcm_close( fcd_handle );
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return false;
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} else {
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qDebug("Funcube stream started");
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}
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return true;
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}
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void FCDThread::CloseSource()
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{
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if (fcd_handle)
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snd_pcm_close( fcd_handle );
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fcd_handle = NULL;
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}
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void FCDInput::set_center_freq(double freq)
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{
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if (fcdAppSetFreq(freq) == FCD_MODE_NONE)
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qDebug("No FCD HID found for frquency change");
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}
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void FCDInput::set_bias_t(bool on)
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{
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quint8 cmd = on ? 1 : 0;
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fcdAppSetParam(FCD_CMD_APP_SET_BIAS_TEE, &cmd, 1);
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}
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void FCDInput::set_lna_gain(bool on)
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{
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quint8 cmd = on ? 1 : 0;
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fcdAppSetParam(FCD_CMD_APP_SET_LNA_GAIN, &cmd, 1);
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}
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int FCDThread::work(int n_items)
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{
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int l;
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SampleVector::iterator it;
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void *out;
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it = m_convertBuffer.begin();
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out = (void *)&it[0];
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l = snd_pcm_mmap_readi(fcd_handle, out, (snd_pcm_uframes_t)n_items);
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if (l > 0)
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m_sampleFifo->write(it, it + l);
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if (l == -EPIPE) {
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qDebug("FCD: Overrun detected");
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return 0;
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}
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return l;
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}
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