mirror of https://github.com/f4exb/sdrangel.git
114 lines
4.0 KiB
C++
114 lines
4.0 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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// Copyright (C) 2016-2017, 2019 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 <QDebug>
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#include "dsp/devicesamplestatic.h"
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#include "dsp/devicesamplesink.h"
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DeviceSampleSink::DeviceSampleSink() :
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m_sampleSourceFifo(1<<19),
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m_guiMessageQueue(0)
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{
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connect(&m_inputMessageQueue, SIGNAL(messageEnqueued()), this, SLOT(handleInputMessages()));
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}
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DeviceSampleSink::~DeviceSampleSink()
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{
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}
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void DeviceSampleSink::handleInputMessages()
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{
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Message* message;
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while ((message = m_inputMessageQueue.pop()) != 0)
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{
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if (handleMessage(*message))
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{
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delete message;
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}
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}
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}
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qint64 DeviceSampleSink::calculateDeviceCenterFrequency(
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quint64 centerFrequency,
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qint64 transverterDeltaFrequency,
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int log2Interp,
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fcPos_t fcPos,
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quint32 devSampleRate,
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bool transverterMode)
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{
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return DeviceSampleStatic::calculateSinkDeviceCenterFrequency(
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centerFrequency,
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transverterDeltaFrequency,
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log2Interp,
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(DeviceSampleStatic::fcPos_t) fcPos,
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devSampleRate,
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transverterMode
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);
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}
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qint64 DeviceSampleSink::calculateCenterFrequency(
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quint64 deviceCenterFrequency,
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qint64 transverterDeltaFrequency,
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int log2Interp,
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fcPos_t fcPos,
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quint32 devSampleRate,
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bool transverterMode)
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{
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return DeviceSampleStatic::calculateSinkCenterFrequency(
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deviceCenterFrequency,
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transverterDeltaFrequency,
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log2Interp,
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(DeviceSampleStatic::fcPos_t) fcPos,
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devSampleRate,
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transverterMode
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);
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}
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/**
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* log2Interp = 0: no shift
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*
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* log2Interp = 1: middle of side band (inf or sup: 1/2)
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* ^ | ^
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* | inf | inf | sup | sup |
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*
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* log2Interp = 2: middle of far side half side band (inf, inf or sup, sup: 1/2 + 1/4)
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* ^ | ^
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* | inf | inf | sup | sup |
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*
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* log2Interp = 3: inf, inf, sup or sup, sup, inf: 1/2 + 1/4 - 1/8 = 5/8
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* log2Interp = 4: inf, inf, sup, inf or sup, sup, inf, sup: 1/2 + 1/4 - 1/8 + 1/16 = 11/16
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* log2Interp = 5: inf, inf, sup, inf, sup or sup, sup, inf, sup, inf: 1/2 + 1/4 - 1/8 + 1/16 - 1/32 = 21/32
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* log2Interp = 6: inf, sup, inf, sup, inf, sup or sup, inf, sup, inf, sup, inf: 1/2 - 1/4 + 1/8 -1/16 + 1/32 - 1/64 = 21/64
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*
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*/
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qint32 DeviceSampleSink::calculateFrequencyShift(
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int log2Interp,
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fcPos_t fcPos,
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quint32 devSampleRate)
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{
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return DeviceSampleStatic::calculateSinkFrequencyShift(
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log2Interp,
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(DeviceSampleStatic::fcPos_t) fcPos,
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devSampleRate
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);
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}
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