mirror of
https://github.com/f4exb/sdrangel.git
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232 lines
5.6 KiB
C++
232 lines
5.6 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 "dsp/samplefifo.h"
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#define MIN(x, y) (((x) < (y)) ? (x) : (y))
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void SampleFifo::create(uint s)
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{
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m_size = 0;
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m_fill = 0;
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m_head = 0;
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m_tail = 0;
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m_data.resize(s);
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m_size = m_data.size();
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if(m_size != s)
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qCritical("SampleFifo: out of memory");
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}
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SampleFifo::SampleFifo(QObject* parent) :
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QObject(parent),
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m_data()
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{
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m_suppressed = -1;
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m_size = 0;
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m_fill = 0;
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m_head = 0;
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m_tail = 0;
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}
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SampleFifo::SampleFifo(int size, QObject* parent) :
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QObject(parent),
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m_data()
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{
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m_suppressed = -1;
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create(size);
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}
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SampleFifo::~SampleFifo()
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{
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QMutexLocker mutexLocker(&m_mutex);
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m_size = 0;
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}
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bool SampleFifo::setSize(int size)
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{
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create(size);
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return m_data.size() == (uint)size;
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}
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uint SampleFifo::write(const quint8* data, uint count)
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{
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QMutexLocker mutexLocker(&m_mutex);
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uint total;
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uint remaining;
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uint len;
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const Sample* begin = (const Sample*)data;
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count /= 4;
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total = MIN(count, m_size - m_fill);
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if(total < count) {
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if(m_suppressed < 0) {
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m_suppressed = 0;
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m_msgRateTimer.start();
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qCritical("SampleFifo: overflow - dropping %u samples", count - total);
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} else {
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if(m_msgRateTimer.elapsed() > 2500) {
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qCritical("SampleFifo: %u messages dropped", m_suppressed);
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qCritical("SampleFifo: overflow - dropping %u samples", count - total);
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m_suppressed = -1;
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} else {
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m_suppressed++;
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}
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}
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}
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remaining = total;
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while(remaining > 0) {
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len = MIN(remaining, m_size - m_tail);
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std::copy(begin, begin + len, m_data.begin() + m_tail);
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m_tail += len;
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m_tail %= m_size;
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m_fill += len;
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begin += len;
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remaining -= len;
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}
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if(m_fill > 0)
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emit dataReady();
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return total;
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}
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uint SampleFifo::write(SampleVector::const_iterator begin, SampleVector::const_iterator end)
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{
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QMutexLocker mutexLocker(&m_mutex);
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uint count = end - begin;
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uint total;
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uint remaining;
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uint len;
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total = MIN(count, m_size - m_fill);
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if(total < count) {
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if(m_suppressed < 0) {
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m_suppressed = 0;
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m_msgRateTimer.start();
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qCritical("SampleFifo: overflow - dropping %u samples", count - total);
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} else {
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if(m_msgRateTimer.elapsed() > 2500) {
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qCritical("SampleFifo: %u messages dropped", m_suppressed);
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qCritical("SampleFifo: overflow - dropping %u samples", count - total);
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m_suppressed = -1;
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} else {
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m_suppressed++;
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}
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}
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}
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remaining = total;
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while(remaining > 0) {
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len = MIN(remaining, m_size - m_tail);
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std::copy(begin, begin + len, m_data.begin() + m_tail);
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m_tail += len;
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m_tail %= m_size;
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m_fill += len;
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begin += len;
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remaining -= len;
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}
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if(m_fill > 0)
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emit dataReady();
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return total;
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}
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uint SampleFifo::read(SampleVector::iterator begin, SampleVector::iterator end)
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{
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QMutexLocker mutexLocker(&m_mutex);
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uint count = end - begin;
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uint total;
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uint remaining;
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uint len;
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total = MIN(count, m_fill);
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if(total < count)
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qCritical("SampleFifo: underflow - missing %u samples", count - total);
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remaining = total;
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while(remaining > 0) {
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len = MIN(remaining, m_size - m_head);
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std::copy(m_data.begin() + m_head, m_data.begin() + m_head + len, begin);
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m_head += len;
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m_head %= m_size;
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m_fill -= len;
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begin += len;
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remaining -= len;
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}
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return total;
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}
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uint SampleFifo::readBegin(uint count,
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SampleVector::iterator* part1Begin, SampleVector::iterator* part1End,
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SampleVector::iterator* part2Begin, SampleVector::iterator* part2End)
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{
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QMutexLocker mutexLocker(&m_mutex);
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uint total;
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uint remaining;
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uint len;
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uint head = m_head;
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total = MIN(count, m_fill);
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if(total < count)
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qCritical("SampleFifo: underflow - missing %u samples", count - total);
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remaining = total;
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if(remaining > 0) {
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len = MIN(remaining, m_size - head);
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*part1Begin = m_data.begin() + head;
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*part1End = m_data.begin() + head + len;
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head += len;
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head %= m_size;
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remaining -= len;
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} else {
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*part1Begin = m_data.end();
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*part1End = m_data.end();
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}
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if(remaining > 0) {
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len = MIN(remaining, m_size - head);
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*part2Begin = m_data.begin() + head;
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*part2End = m_data.begin() + head + len;
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} else {
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*part2Begin = m_data.end();
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*part2End = m_data.end();
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}
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return total;
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}
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uint SampleFifo::readCommit(uint count)
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{
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QMutexLocker mutexLocker(&m_mutex);
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if(count > m_fill) {
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qCritical("SampleFifo: cannot commit more than available samples");
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count = m_fill;
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}
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m_head = (m_head + count) % m_size;
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m_fill -= count;
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return count;
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}
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