mirror of
https://github.com/f4exb/sdrangel.git
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252 lines
7.2 KiB
C++
252 lines
7.2 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2015 Edouard Griffiths, F4EXB //
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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 <stdio.h>
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#include <errno.h>
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#include <assert.h>
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#include <QDebug>
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#include "dsp/filerecord.h"
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#include "filesourcethread.h"
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#include "dsp/samplesinkfifo.h"
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FileSourceThread::FileSourceThread(std::ifstream *samplesStream, SampleSinkFifo* sampleFifo, QObject* parent) :
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QThread(parent),
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m_running(false),
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m_ifstream(samplesStream),
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m_fileBuf(0),
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m_convertBuf(0),
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m_bufsize(0),
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m_chunksize(0),
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m_sampleFifo(sampleFifo),
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m_samplesCount(0),
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m_samplerate(0),
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m_samplesize(0),
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m_samplebytes(0),
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m_throttlems(FILESOURCE_THROTTLE_MS),
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m_throttleToggle(false)
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{
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assert(m_ifstream != 0);
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}
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FileSourceThread::~FileSourceThread()
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{
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if (m_running) {
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stopWork();
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}
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if (m_fileBuf != 0) {
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free(m_fileBuf);
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}
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if (m_convertBuf != 0) {
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free(m_convertBuf);
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}
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}
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void FileSourceThread::startWork()
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{
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qDebug() << "FileSourceThread::startWork: ";
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if (m_ifstream->is_open())
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{
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qDebug() << "FileSourceThread::startWork: file stream open, starting...";
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m_startWaitMutex.lock();
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m_elapsedTimer.start();
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start();
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while(!m_running)
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m_startWaiter.wait(&m_startWaitMutex, 100);
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m_startWaitMutex.unlock();
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}
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else
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{
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qDebug() << "FileSourceThread::startWork: file stream closed, not starting.";
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}
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}
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void FileSourceThread::stopWork()
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{
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qDebug() << "FileSourceThread::stopWork";
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m_running = false;
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wait();
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}
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void FileSourceThread::setSampleRateAndSize(int samplerate, quint32 samplesize)
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{
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qDebug() << "FileSourceThread::setSampleRateAndSize:"
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<< " new rate:" << samplerate
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<< " new size:" << samplesize
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<< " old rate:" << m_samplerate
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<< " old size:" << m_samplesize;
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if ((samplerate != m_samplerate) || (samplesize != m_samplesize))
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{
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if (m_running) {
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stopWork();
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}
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m_samplerate = samplerate;
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m_samplesize = samplesize;
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m_samplebytes = m_samplesize > 16 ? sizeof(int32_t) : sizeof(int16_t);
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// TODO: implement FF and slow motion here. 2 corresponds to live. 1 is half speed, 4 is double speed
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m_chunksize = (m_samplerate * 2 * m_samplebytes * m_throttlems) / 1000;
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setBuffers(m_chunksize);
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}
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//m_samplerate = samplerate;
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}
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void FileSourceThread::setBuffers(std::size_t chunksize)
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{
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if (chunksize > m_bufsize)
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{
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m_bufsize = chunksize;
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int nbSamples = m_bufsize/(2 * m_samplebytes);
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if (m_fileBuf == 0)
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{
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qDebug() << "FileSourceThread::setBuffers: Allocate file buffer";
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m_fileBuf = (quint8*) malloc(m_bufsize);
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}
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else
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{
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qDebug() << "FileSourceThread::setBuffers: Re-allocate file buffer";
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quint8 *buf = m_fileBuf;
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m_fileBuf = (quint8*) realloc((void*) m_fileBuf, m_bufsize);
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if (!m_fileBuf) free(buf);
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}
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if (m_convertBuf == 0)
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{
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qDebug() << "FileSourceThread::setBuffers: Allocate conversion buffer";
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m_convertBuf = (quint8*) malloc(nbSamples*sizeof(Sample));
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}
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else
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{
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qDebug() << "FileSourceThread::setBuffers: Re-allocate conversion buffer";
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quint8 *buf = m_convertBuf;
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m_convertBuf = (quint8*) realloc((void*) m_convertBuf, nbSamples*sizeof(Sample));
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if (!m_convertBuf) free(buf);
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}
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qDebug() << "FileSourceThread::setBuffers: size: " << m_bufsize
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<< " #samples: " << nbSamples;
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}
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}
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void FileSourceThread::run()
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{
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m_running = true;
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m_startWaiter.wakeAll();
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while(m_running) // actual work is in the tick() function
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{
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sleep(1);
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}
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m_running = false;
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}
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void FileSourceThread::connectTimer(const QTimer& timer)
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{
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qDebug() << "FileSourceThread::connectTimer";
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connect(&timer, SIGNAL(timeout()), this, SLOT(tick()));
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}
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void FileSourceThread::tick()
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{
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if (m_running)
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{
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qint64 throttlems = m_elapsedTimer.restart();
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if (throttlems != m_throttlems)
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{
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m_throttlems = throttlems;
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m_chunksize = 2 * m_samplebytes * ((m_samplerate * (m_throttlems+(m_throttleToggle ? 1 : 0))) / 1000);
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m_throttleToggle = !m_throttleToggle;
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setBuffers(m_chunksize);
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}
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// read samples directly feeding the SampleFifo (no callback)
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m_ifstream->read(reinterpret_cast<char*>(m_fileBuf), m_chunksize);
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if (m_ifstream->eof())
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{
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writeToSampleFifo(m_fileBuf, (qint32) m_ifstream->gcount());
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//m_sampleFifo->write(m_buf, m_ifstream->gcount());
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// TODO: handle loop playback situation
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m_ifstream->clear();
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m_ifstream->seekg(sizeof(FileRecord::Header), std::ios::beg);
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m_samplesCount = 0;
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//stopWork();
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//m_ifstream->close();
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}
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else
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{
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writeToSampleFifo(m_fileBuf, (qint32) m_chunksize);
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//m_sampleFifo->write(m_buf, m_chunksize);
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m_samplesCount += m_chunksize / (2 * m_samplebytes);
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}
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}
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}
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void FileSourceThread::writeToSampleFifo(const quint8* buf, qint32 nbBytes)
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{
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if (m_samplesize == 16)
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{
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if (SDR_RX_SAMP_SZ == 16)
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{
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m_sampleFifo->write(buf, nbBytes);
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}
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else if (SDR_RX_SAMP_SZ == 24)
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{
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FixReal *convertBuf = (FixReal *) m_convertBuf;
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const int16_t *fileBuf = (int16_t *) buf;
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int nbSamples = nbBytes / (2 * m_samplebytes);
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for (int is = 0; is < nbSamples; is++)
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{
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convertBuf[2*is] = fileBuf[2*is] << 8;
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convertBuf[2*is+1] = fileBuf[2*is+1] << 8;
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}
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m_sampleFifo->write((quint8*) convertBuf, nbSamples*sizeof(Sample));
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}
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}
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else if (m_samplesize == 24)
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{
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if (SDR_RX_SAMP_SZ == 24)
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{
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m_sampleFifo->write(buf, nbBytes);
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}
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else if (SDR_RX_SAMP_SZ == 16)
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{
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FixReal *convertBuf = (FixReal *) m_convertBuf;
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const int32_t *fileBuf = (int32_t *) buf;
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int nbSamples = nbBytes / (2 * m_samplebytes);
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for (int is = 0; is < nbSamples; is++)
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{
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convertBuf[2*is] = fileBuf[2*is] >> 8;
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convertBuf[2*is+1] = fileBuf[2*is+1] >> 8;
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}
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m_sampleFifo->write((quint8*) convertBuf, nbSamples*sizeof(Sample));
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}
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}
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}
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