mirror of
https://github.com/f4exb/sdrangel.git
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138 lines
3.2 KiB
C++
138 lines
3.2 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
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// written by Christian Daniel //
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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 License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#include <stdio.h>
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#include <errno.h>
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#include "fcdthread.h"
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#include "dsp/samplefifo.h"
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FCDThread::FCDThread(SampleFifo* sampleFifo, QObject* parent) :
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QThread(parent),
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fcd_handle(NULL),
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m_running(false),
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m_convertBuffer(FCD_BLOCKSIZE),
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m_sampleFifo(sampleFifo)
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{
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start();
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}
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FCDThread::~FCDThread()
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{
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}
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void FCDThread::stopWork()
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{
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m_running = false;
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wait();
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}
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void FCDThread::run()
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{
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if ( !OpenSource("hw:CARD=V10") ) // FIXME: original is V10 pro is V20. Make it an option
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return;
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// TODO: fallback to original fcd
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m_running = true;
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while(m_running) {
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if ( work(FCD_BLOCKSIZE) < 0)
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break;
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}
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CloseSource();
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}
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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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{
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return false;
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}
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if (snd_pcm_open(&fcd_handle, cardname, fcd_stream, 0) < 0)
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{
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return false;
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}
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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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{
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fail = true;
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}
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else if (snd_pcm_hw_params(fcd_handle, params) < 0)
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{
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fail = true;
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// TODO: check actual samplerate, may be crippled firmware
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}
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else
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{
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if (snd_pcm_start(fcd_handle) < 0)
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{
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fail = true;
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}
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}
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if (fail)
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{
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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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}
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else
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{
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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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{
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snd_pcm_close( fcd_handle );
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}
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fcd_handle = NULL;
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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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