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sdrangel/sdrbase/dsp/samplesinkfifo.cpp

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///////////////////////////////////////////////////////////////////////////////////
// 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 //
// //
// 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 "samplesinkfifo.h"
#define MIN(x, y) (((x) < (y)) ? (x) : (y))
void SampleSinkFifo::create(uint s)
{
m_size = 0;
m_fill = 0;
m_head = 0;
m_tail = 0;
m_data.resize(s);
m_size = m_data.size();
if(m_size != s)
qCritical("SampleSinkFifo: out of memory");
}
SampleSinkFifo::SampleSinkFifo(QObject* parent) :
QObject(parent),
m_data()
{
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_suppressed = -1;
create(size);
}
SampleSinkFifo::~SampleSinkFifo()
{
QMutexLocker mutexLocker(&m_mutex);
m_size = 0;
}
bool SampleSinkFifo::setSize(int size)
{
create(size);
return m_data.size() == (uint)size;
}
uint SampleSinkFifo::write(const quint8* data, uint count)
{
QMutexLocker mutexLocker(&m_mutex);
uint total;
uint remaining;
uint len;
const Sample* begin = (const Sample*)data;
count /= 4;
total = MIN(count, m_size - m_fill);
if(total < count) {
if(m_suppressed < 0) {
m_suppressed = 0;
m_msgRateTimer.start();
qCritical("SampleSinkFifo: overflow - dropping %u samples", count - total);
} else {
if(m_msgRateTimer.elapsed() > 2500) {
qCritical("SampleSinkFifo: %u messages dropped", m_suppressed);
qCritical("SampleSinkFifo: overflow - dropping %u samples", count - total);
m_suppressed = -1;
} else {
m_suppressed++;
}
}
}
remaining = total;
while(remaining > 0) {
len = 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();
return total;
}
uint SampleSinkFifo::write(SampleVector::const_iterator begin, SampleVector::const_iterator end)
{
QMutexLocker mutexLocker(&m_mutex);
uint count = end - begin;
uint total;
uint remaining;
uint len;
total = MIN(count, m_size - m_fill);
if(total < count) {
if(m_suppressed < 0) {
m_suppressed = 0;
m_msgRateTimer.start();
qCritical("SampleSinkFifo: overflow - dropping %u samples", count - total);
} else {
if(m_msgRateTimer.elapsed() > 2500) {
qCritical("SampleSinkFifo: %u messages dropped", m_suppressed);
qCritical("SampleSinkFifo: overflow - dropping %u samples", count - total);
m_suppressed = -1;
} else {
m_suppressed++;
}
}
}
remaining = total;
while(remaining > 0) {
len = 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();
return total;
}
uint SampleSinkFifo::read(SampleVector::iterator begin, SampleVector::iterator end)
{
QMutexLocker mutexLocker(&m_mutex);
uint count = end - begin;
uint total;
uint remaining;
uint len;
total = MIN(count, m_fill);
if(total < count)
qCritical("SampleSinkFifo: underflow - missing %u samples", count - total);
remaining = total;
while(remaining > 0) {
len = 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;
}
uint SampleSinkFifo::readBegin(uint count,
SampleVector::iterator* part1Begin, SampleVector::iterator* part1End,
SampleVector::iterator* part2Begin, SampleVector::iterator* part2End)
{
QMutexLocker mutexLocker(&m_mutex);
uint total;
uint remaining;
uint len;
uint head = m_head;
total = MIN(count, m_fill);
if(total < count)
qCritical("SampleSinkFifo: underflow - missing %u samples", count - total);
remaining = total;
if(remaining > 0) {
len = 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 = 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;
}
uint SampleSinkFifo::readCommit(uint count)
{
QMutexLocker mutexLocker(&m_mutex);
if(count > m_fill) {
qCritical("SampleSinkFifo: cannot commit more than available samples");
count = m_fill;
}
m_head = (m_head + count) % m_size;
m_fill -= count;
return count;
}