mirror of
https://github.com/f4exb/sdrangel.git
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259 lines
8.0 KiB
C++
259 lines
8.0 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2020 Jon Beniston, M7RCE <jon@beniston.com> //
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// Copyright (C) 2020 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
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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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// (at your option) any later version. //
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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 <errno.h>
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#include <algorithm>
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#include <QDebug>
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#include <uhd/types/stream_cmd.hpp>
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#include "usrpinputthread.h"
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USRPInputThread::USRPInputThread(uhd::rx_streamer::sptr stream, size_t bufSamples,
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SampleSinkFifo* sampleFifo, ReplayBuffer<qint16> *replayBuffer, QObject* parent) :
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QThread(parent),
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m_running(false),
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m_stream(stream),
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m_bufSamples(bufSamples),
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m_convertBuffer(bufSamples),
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m_sampleFifo(sampleFifo),
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m_replayBuffer(replayBuffer),
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m_log2Decim(0)
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{
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// *2 as samples are I+Q
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m_buf = new qint16[2*bufSamples];
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std::fill(m_buf, m_buf + 2*bufSamples, 0);
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}
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USRPInputThread::~USRPInputThread()
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{
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stopWork();
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delete m_buf;
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}
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void USRPInputThread::issueStreamCmd(bool start)
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{
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uhd::stream_cmd_t stream_cmd(start ? uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS : uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);
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stream_cmd.num_samps = size_t(0);
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stream_cmd.stream_now = true;
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stream_cmd.time_spec = uhd::time_spec_t();
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if (m_stream)
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{
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m_stream->issue_stream_cmd(stream_cmd);
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qDebug() << "USRPInputThread::issueStreamCmd " << (start ? "start" : "stop");
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}
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else
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{
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qDebug() << "USRPInputThread::issueStreamCmd m_stream is null";
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}
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}
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void USRPInputThread::startWork()
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{
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if (m_running) return; // return if running already
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try
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{
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// Start streaming
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issueStreamCmd(true);
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// Reset stats
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m_packets = 0;
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m_overflows = 0;
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m_timeouts = 0;
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qDebug("USRPInputThread::startWork: stream started");
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}
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catch (std::exception& e)
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{
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qDebug() << "USRPInputThread::startWork: exception: " << e.what();
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}
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m_startWaitMutex.lock();
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start();
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while(!m_running)
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m_startWaiter.wait(&m_startWaitMutex, 100);
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m_startWaitMutex.unlock();
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}
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void USRPInputThread::stopWork()
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{
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if (!m_running) return; // return if not running
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m_running = false;
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wait();
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try
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{
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uhd::rx_metadata_t md;
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// Stop streaming
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issueStreamCmd(false);
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// Clear out any data left in the stream, otherwise we'll get an
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// exception 'recv buffer smaller than vrt packet offset' when restarting
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md.end_of_burst = false;
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md.error_code = uhd::rx_metadata_t::ERROR_CODE_NONE;
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while (!md.end_of_burst && (md.error_code != uhd::rx_metadata_t::ERROR_CODE_TIMEOUT))
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{
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try
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{
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md.reset();
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m_stream->recv(m_buf, m_bufSamples, md);
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}
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catch (std::exception& e)
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{
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qDebug() << "USRPInputThread::stopWork: exception ignored while flushing buffers: " << e.what();
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}
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}
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qDebug("USRPInputThread::stopWork: stream stopped");
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}
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catch (std::exception& e)
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{
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qDebug() << "USRPInputThread::stopWork: exception: " << e.what();
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}
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}
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void USRPInputThread::setLog2Decimation(unsigned int log2_decim)
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{
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m_log2Decim = log2_decim;
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}
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void USRPInputThread::run()
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{
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uhd::rx_metadata_t md;
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m_running = true;
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m_startWaiter.wakeAll();
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try
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{
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while (m_running)
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{
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md.reset();
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const size_t samples_received = m_stream->recv(m_buf, m_bufSamples, md);
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m_packets++;
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if (samples_received != m_bufSamples)
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{
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qDebug("USRPInputThread::run - received %ld/%ld samples", samples_received, m_bufSamples);
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}
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if (md.error_code == uhd::rx_metadata_t::ERROR_CODE_TIMEOUT)
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{
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qDebug("USRPInputThread::run - timeout - ending thread");
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m_timeouts++;
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// Restart streaming
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issueStreamCmd(false);
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issueStreamCmd(true);
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qDebug("USRPInputThread::run - timeout - restarting");
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}
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else if (md.error_code == uhd::rx_metadata_t::ERROR_CODE_OVERFLOW)
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{
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qDebug("USRPInputThread::run - overflow");
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m_overflows++;
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}
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else if (md.error_code == uhd::rx_metadata_t::ERROR_CODE_LATE_COMMAND)
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qDebug("USRPInputThread::run - late command error");
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else if (md.error_code == uhd::rx_metadata_t::ERROR_CODE_BROKEN_CHAIN)
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qDebug("USRPInputThread::run - broken chain error");
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else if (md.error_code == uhd::rx_metadata_t::ERROR_CODE_ALIGNMENT)
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qDebug("USRPInputThread::run - alignment error");
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else if (md.error_code == uhd::rx_metadata_t::ERROR_CODE_BAD_PACKET)
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qDebug("USRPInputThread::run - bad packet error");
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if (samples_received > 0)
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callbackIQ(m_buf, 2 * samples_received);
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}
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}
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catch (std::exception& e)
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{
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qDebug() << "USRPInputThread::run: exception: " << e.what();
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}
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m_running = false;
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}
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// Decimate according to specified log2 (ex: log2=4 => decim=16)
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void USRPInputThread::callbackIQ(const qint16* inBuf, qint32 len)
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{
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SampleVector::iterator it = m_convertBuffer.begin();
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// Save data to replay buffer
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m_replayBuffer->lock();
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bool replayEnabled = m_replayBuffer->getSize() > 0;
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if (replayEnabled) {
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m_replayBuffer->write(inBuf, len);
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}
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const qint16* buf = inBuf;
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qint32 remaining = len;
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while (remaining > 0)
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{
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// Choose between live data or replayed data
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if (replayEnabled && m_replayBuffer->useReplay()) {
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len = m_replayBuffer->read(remaining, buf);
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} else {
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len = remaining;
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}
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remaining -= len;
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switch (m_log2Decim)
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{
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case 0:
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m_decimatorsIQ.decimate1(&it, buf, len);
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break;
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case 1:
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m_decimatorsIQ.decimate2_cen(&it, buf, len);
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break;
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case 2:
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m_decimatorsIQ.decimate4_cen(&it, buf, len);
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break;
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case 3:
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m_decimatorsIQ.decimate8_cen(&it, buf, len);
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break;
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case 4:
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m_decimatorsIQ.decimate16_cen(&it, buf, len);
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break;
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case 5:
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m_decimatorsIQ.decimate32_cen(&it, buf, len);
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break;
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case 6:
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m_decimatorsIQ.decimate64_cen(&it, buf, len);
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break;
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default:
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break;
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}
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}
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m_replayBuffer->unlock();
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m_sampleFifo->write(m_convertBuffer.begin(), it);
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}
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void USRPInputThread::getStreamStatus(bool& active, quint32& overflows, quint32& timeouts)
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{
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//qDebug() << "USRPInputThread::getStreamStatus " << m_packets << " " << m_overflows << " " << m_timeouts;
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active = m_packets > 0;
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overflows = m_overflows;
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timeouts = m_timeouts;
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}
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