mirror of
https://github.com/f4exb/sdrangel.git
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98 lines
5.0 KiB
C++
98 lines
5.0 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2018 Edouard Griffiths, F4EXB. //
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// //
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// Remote sink channel (Rx) data blocks to read queue //
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// //
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// SDRangel can serve as a remote SDR front end that handles the interface //
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// with a physical device and sends or receives the I/Q samples stream via UDP //
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// to or from another SDRangel instance or any program implementing the same //
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// protocol. The remote SDRangel is controlled via its Web REST API. //
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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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#ifndef CHANNEL_REMOTEDATAREADQUEUE_H_
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#define CHANNEL_REMOTEDATAREADQUEUE_H_
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#include <QQueue>
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#include "export.h"
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class RemoteDataFrame;
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struct Sample;
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class SDRBASE_API RemoteDataReadQueue
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{
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public:
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RemoteDataReadQueue();
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~RemoteDataReadQueue();
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void push(RemoteDataFrame* dataFrame); //!< push frame on the queue
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void readSample(Sample& s, bool scaleForTx = false); //!< Read sample from queue possibly scaling to Tx size
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uint32_t length() const { return m_dataReadQueue.size(); } //!< Returns queue length
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uint32_t size() const { return m_maxSize; } //!< Returns queue size (max length)
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void setSize(uint32_t size); //!< Sets the queue size (max length)
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uint32_t readSampleCount() const { return m_sampleCount; } //!< Returns the absolute number of samples read
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static const uint32_t MinimumMaxSize;
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private:
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QQueue<RemoteDataFrame*> m_dataReadQueue;
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RemoteDataFrame *m_dataFrame;
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uint32_t m_maxSize;
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uint32_t m_blockIndex;
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uint32_t m_sampleIndex;
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uint32_t m_sampleCount; //!< use a counter capped below 2^31 as it is going to be converted to an int in the web interface
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RemoteDataFrame* pop(); //!< Pop frame from the queue
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inline void convertDataToSample(Sample& s, uint32_t blockIndex, uint32_t sampleIndex, bool scaleForTx)
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{
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int sampleSize = m_dataFrame->m_superBlocks[blockIndex].m_header.m_sampleBytes * 2; // I/Q sample size in data block
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int samplebits = m_dataFrame->m_superBlocks[blockIndex].m_header.m_sampleBits; // I or Q sample size in bits
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int32_t iconv, qconv;
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if ((sizeof(Sample) == 4) && (sampleSize == 8)) // generally 24->16 bits
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{
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iconv = ((int32_t*) &(m_dataFrame->m_superBlocks[blockIndex].m_protectedBlock.buf[sampleIndex*sampleSize]))[0];
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qconv = ((int32_t*) &(m_dataFrame->m_superBlocks[blockIndex].m_protectedBlock.buf[sampleIndex*sampleSize+4]))[0];
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iconv >>= scaleForTx ? (SDR_TX_SAMP_SZ-SDR_RX_SAMP_SZ) : (samplebits-SDR_RX_SAMP_SZ);
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qconv >>= scaleForTx ? (SDR_TX_SAMP_SZ-SDR_RX_SAMP_SZ) : (samplebits-SDR_RX_SAMP_SZ);
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s.setReal(iconv);
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s.setImag(qconv);
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}
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else if ((sizeof(Sample) == 8) && (sampleSize == 4)) // generally 16->24 bits
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{
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iconv = ((int16_t*) &(m_dataFrame->m_superBlocks[blockIndex].m_protectedBlock.buf[sampleIndex*sampleSize]))[0];
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qconv = ((int16_t*) &(m_dataFrame->m_superBlocks[blockIndex].m_protectedBlock.buf[sampleIndex*sampleSize+2]))[0];
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iconv <<= scaleForTx ? (SDR_TX_SAMP_SZ-samplebits) : (SDR_RX_SAMP_SZ-samplebits);
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qconv <<= scaleForTx ? (SDR_TX_SAMP_SZ-samplebits) : (SDR_RX_SAMP_SZ-samplebits);
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s.setReal(iconv);
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s.setImag(qconv);
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}
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else if ((sampleSize == 4) || (sampleSize == 8)) // generally 16->16 or 24->24 bits
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{
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s = *((Sample*) &(m_dataFrame->m_superBlocks[blockIndex].m_protectedBlock.buf[sampleIndex*sampleSize]));
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}
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else // invalid size
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{
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s = Sample{0, 0};
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}
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}
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};
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#endif /* CHANNEL_REMOTEDATAREADQUEUE_H_ */
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