mirror of
https://github.com/JvanKatwijk/dab-cmdline
synced 2025-10-05 23:52:50 +02:00
92 lines
2.5 KiB
C++
92 lines
2.5 KiB
C++
#
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/*
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* Copyright (C) 2013 .. 2017
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* Jan van Katwijk (J.vanKatwijk@gmail.com)
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* Lazy Chair Computing
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*
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* This file is part of the DAB library
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*
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* DAB library 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; either version 2 of the License, or
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* (at your option) any later version.
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*
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* DAB library 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 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 DAB library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "streamer.h"
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#include <sys/time.h>
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#include <time.h>
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#include <unistd.h>
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#include <stdlib.h>
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static inline
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int64_t getMyTime () {
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struct timeval tv;
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gettimeofday (&tv, NULL);
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return ((int64_t)tv. tv_sec * 1000000 + (int64_t)tv. tv_usec);
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}
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streamer::streamer () {
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theBuffer = new RingBuffer <int16_t> (16 * 32768);
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running. store (false);
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workerHandle = std::thread (&streamer::run, this);
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}
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streamer::~streamer () {
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stop ();
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delete theBuffer;
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}
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void streamer::stop () {
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if (running. load ()) {
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running. store (false);
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workerHandle. join ();
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}
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}
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bool streamer::isRunning () {
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return running. load ();
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}
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bool streamer::restart (void) {
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return false;
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}
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//
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//
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// amount is the number of 16 bit value, i.e. 2 values per sample
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void streamer::addBuffer (void *buffer, int amount, int elsize) {
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(void)elsize;
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if (running. load ())
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// fprintf (stderr, "putting data into buffer\n");
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theBuffer -> putDataIntoBuffer (buffer, amount);
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}
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int16_t lbuf [2 * 4800];
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void streamer::run () {
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int period = 100000; // usec
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int64_t nextStop = (int64_t)(getMyTime ());
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running. store (true);
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while (running. load ()) {
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int a = theBuffer -> getDataFromBuffer (lbuf, 2 * 4800);
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// fprintf (stderr, "got data from buffer a = %d\n", a);
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if (a < 2 * 4800)
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memset (&lbuf [a], 0, (4800 * 2 - a) * sizeof (int16_t));
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nextStop = nextStop + period;
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// fprintf (stderr, "writing data out\n");
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fwrite (lbuf, 2 * 4800, sizeof (int16_t), stdout);
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if (nextStop - getMyTime () > 0)
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usleep (nextStop - getMyTime ());
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}
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}
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