sdrangel/sdrbase/dsp/samplesinkfifo.cpp

365 wiersze
8.2 KiB
C++

///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
// written by Christian Daniel //
// //
// This program is free software; you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation as version 3 of the License, or //
// (at your option) any later version. //
// //
// This program is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License V3 for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
///////////////////////////////////////////////////////////////////////////////////
#include "maincore.h"
#include "samplesinkfifo.h"
//#define MIN(x, y) (((x) < (y)) ? (x) : (y))
void SampleSinkFifo::create(unsigned int s)
{
m_fill = 0;
m_head = 0;
m_tail = 0;
m_data.resize(s);
m_size = m_data.size();
}
void SampleSinkFifo::reset()
{
QMutexLocker mutexLocker(&m_mutex);
m_suppressed = -1;
m_fill = 0;
m_head = 0;
m_tail = 0;
}
SampleSinkFifo::SampleSinkFifo(QObject* parent) :
QObject(parent),
m_data(),
m_total(0),
m_writtenSignalCount(0),
m_writtenSignalRateDivider(1),
m_mutex(QMutex::Recursive)
{
m_suppressed = -1;
m_size = 0;
m_fill = 0;
m_head = 0;
m_tail = 0;
}
SampleSinkFifo::SampleSinkFifo(int size, QObject* parent) :
QObject(parent),
m_data(),
m_total(0),
m_writtenSignalCount(0),
m_writtenSignalRateDivider(1),
m_mutex(QMutex::Recursive)
{
m_suppressed = -1;
create(size);
}
SampleSinkFifo::SampleSinkFifo(const SampleSinkFifo& other) :
QObject(other.parent()),
m_data(other.m_data),
m_total(0),
m_writtenSignalCount(0),
m_writtenSignalRateDivider(1),
m_mutex(QMutex::Recursive)
{
m_suppressed = -1;
m_size = m_data.size();
m_fill = 0;
m_head = 0;
m_tail = 0;
}
SampleSinkFifo::~SampleSinkFifo()
{
QMutexLocker mutexLocker(&m_mutex);
m_size = 0;
}
bool SampleSinkFifo::setSize(int size)
{
QMutexLocker mutexLocker(&m_mutex);
create(size);
return m_data.size() == (unsigned int)size;
}
void SampleSinkFifo::setWrittenSignalRateDivider(unsigned int divider)
{
QMutexLocker mutexLocker(&m_mutex);
m_writtenSignalRateDivider = divider;
}
unsigned int SampleSinkFifo::write(const quint8* data, unsigned int count)
{
QMutexLocker mutexLocker(&m_mutex);
if (m_size == 0) {
return 0;
}
unsigned int total;
unsigned int remaining;
unsigned int len;
const Sample* begin = (const Sample*)data;
count /= sizeof(Sample);
total = std::min(count, m_size - m_fill);
if (total < count)
{
if (m_suppressed < 0)
{
m_suppressed = 0;
m_msgRateTimer.start();
qCritical("SampleSinkFifo::write: (%s) overflow - dropping %u samples",
qPrintable(m_label), count - total);
emit overflow(count - total);
}
else
{
if (m_msgRateTimer.elapsed() > 2500)
{
qCritical("SampleSinkFifo::write: (%s) %u messages dropped", qPrintable(m_label), m_suppressed);
qCritical("SampleSinkFifo::write: (%s) overflow - dropping %u samples",
qPrintable(m_label), count - total);
emit overflow(count - total);
m_suppressed = -1;
}
else
{
m_suppressed++;
}
}
}
remaining = total;
while (remaining > 0)
{
len = std::min(remaining, m_size - m_tail);
std::copy(begin, begin + len, m_data.begin() + m_tail);
m_tail += len;
m_tail %= m_size;
m_fill += len;
begin += len;
remaining -= len;
}
if (m_fill > 0) {
emit dataReady();
}
m_total += total;
if (++m_writtenSignalCount >= m_writtenSignalRateDivider)
{
emit written(m_total, MainCore::instance()->getElapsedNsecs());
m_total = 0;
m_writtenSignalCount = 0;
}
return total;
}
unsigned int SampleSinkFifo::write(SampleVector::const_iterator begin, SampleVector::const_iterator end)
{
QMutexLocker mutexLocker(&m_mutex);
if (m_size == 0) {
return 0;
}
unsigned int count = end - begin;
unsigned int total;
unsigned int remaining;
unsigned int len;
total = std::min(count, m_size - m_fill);
if (total < count)
{
if (m_suppressed < 0)
{
m_suppressed = 0;
m_msgRateTimer.start();
qCritical("SampleSinkFifo::write: (%s) overflow - dropping %u samples",
qPrintable(m_label), count - total);
emit overflow(count - total);
}
else
{
if (m_msgRateTimer.elapsed() > 2500)
{
qCritical("SampleSinkFifo::write: (%s) %u messages dropped", qPrintable(m_label), m_suppressed);
qCritical("SampleSinkFifo::write: (%s) overflow - dropping %u samples",
qPrintable(m_label), count - total);
emit overflow(count - total);
m_suppressed = -1;
}
else
{
m_suppressed++;
}
}
}
remaining = total;
while (remaining > 0)
{
len = std::min(remaining, m_size - m_tail);
std::copy(begin, begin + len, m_data.begin() + m_tail);
m_tail += len;
m_tail %= m_size;
m_fill += len;
begin += len;
remaining -= len;
}
if (m_fill > 0) {
emit dataReady();
}
m_total += total;
if (++m_writtenSignalCount >= m_writtenSignalRateDivider)
{
emit written(m_total, MainCore::instance()->getElapsedNsecs());
m_total = 0;
m_writtenSignalCount = 0;
}
return total;
}
unsigned int SampleSinkFifo::read(SampleVector::iterator begin, SampleVector::iterator end)
{
QMutexLocker mutexLocker(&m_mutex);
if (m_size == 0) {
return 0;
}
unsigned int count = end - begin;
unsigned int total;
unsigned int remaining;
unsigned int len;
total = std::min(count, m_fill);
if (total < count)
{
qCritical("SampleSinkFifo::read: (%s) underflow - missing %u samples",
qPrintable(m_label), count - total);
emit underflow(count - total);
}
remaining = total;
while (remaining > 0)
{
len = std::min(remaining, m_size - m_head);
std::copy(m_data.begin() + m_head, m_data.begin() + m_head + len, begin);
m_head += len;
m_head %= m_size;
m_fill -= len;
begin += len;
remaining -= len;
}
return total;
}
unsigned int SampleSinkFifo::readBegin(unsigned int count,
SampleVector::iterator* part1Begin, SampleVector::iterator* part1End,
SampleVector::iterator* part2Begin, SampleVector::iterator* part2End)
{
QMutexLocker mutexLocker(&m_mutex);
if (m_size == 0) {
return 0;
}
unsigned int total;
unsigned int remaining;
unsigned int len;
unsigned int head = m_head;
total = std::min(count, m_fill);
if (total < count)
{
qCritical("SampleSinkFifo::readBegin: (%s) underflow - missing %u samples",
qPrintable(m_label), count - total);
emit underflow(count - total);
}
remaining = total;
if (remaining > 0)
{
len = std::min(remaining, m_size - head);
*part1Begin = m_data.begin() + head;
*part1End = m_data.begin() + head + len;
head += len;
head %= m_size;
remaining -= len;
}
else
{
*part1Begin = m_data.end();
*part1End = m_data.end();
}
if (remaining > 0)
{
len = std::min(remaining, m_size - head);
*part2Begin = m_data.begin() + head;
*part2End = m_data.begin() + head + len;
}
else
{
*part2Begin = m_data.end();
*part2End = m_data.end();
}
return total;
}
unsigned int SampleSinkFifo::readCommit(unsigned int count)
{
QMutexLocker mutexLocker(&m_mutex);
if (m_size == 0) {
return 0;
}
if (count > m_fill)
{
qCritical("SampleSinkFifo::readCommit: (%s) cannot commit more than available samples", qPrintable(m_label));
count = m_fill;
}
m_head = (m_head + count) % m_size;
m_fill -= count;
return count;
}
unsigned int SampleSinkFifo::getSizePolicy(unsigned int sampleRate)
{
return (sampleRate/100)*64; // .64s
}