mirror of git://sigrok.org/pulseview
130 lines
2.6 KiB
C++
130 lines
2.6 KiB
C++
/*
|
|
* This file is part of the PulseView project.
|
|
*
|
|
* Copyright (C) 2015 Joel Holdsworth <joel@airwebreathe.org.uk>
|
|
*
|
|
* 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; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* 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 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 <cassert>
|
|
#include <fstream>
|
|
|
|
#include <QString>
|
|
|
|
#include "inputfile.hpp"
|
|
|
|
using std::map;
|
|
using std::shared_ptr;
|
|
using std::streamsize;
|
|
using std::string;
|
|
using std::ifstream;
|
|
using std::ios;
|
|
|
|
namespace pv {
|
|
namespace devices {
|
|
|
|
const streamsize InputFile::BufferSize = 16384;
|
|
|
|
InputFile::InputFile(const shared_ptr<sigrok::Context> &context,
|
|
const string &file_name,
|
|
shared_ptr<sigrok::InputFormat> format,
|
|
const map<string, Glib::VariantBase> &options) :
|
|
File(file_name),
|
|
context_(context),
|
|
format_(format),
|
|
options_(options),
|
|
interrupt_(false)
|
|
{
|
|
}
|
|
|
|
void InputFile::open()
|
|
{
|
|
if (session_)
|
|
close();
|
|
else
|
|
session_ = context_->create_session();
|
|
|
|
input_ = format_->create_input(options_);
|
|
|
|
if (!input_)
|
|
throw QString("Failed to create input");
|
|
|
|
// open() should add the input device to the session but
|
|
// we can't open the device without sending some data first
|
|
f = new ifstream(file_name_, ios::binary);
|
|
|
|
char buffer[BufferSize];
|
|
f->read(buffer, BufferSize);
|
|
const streamsize size = f->gcount();
|
|
if (size == 0)
|
|
return;
|
|
|
|
input_->send(buffer, size);
|
|
|
|
try {
|
|
device_ = input_->device();
|
|
} catch (sigrok::Error) {
|
|
return;
|
|
}
|
|
|
|
session_->add_device(device_);
|
|
}
|
|
|
|
void InputFile::close()
|
|
{
|
|
if (session_)
|
|
session_->remove_devices();
|
|
}
|
|
|
|
void InputFile::start()
|
|
{
|
|
}
|
|
|
|
void InputFile::run()
|
|
{
|
|
char buffer[BufferSize];
|
|
|
|
if (!f) {
|
|
// Previous call to run() processed the entire file already
|
|
f = new ifstream(file_name_, ios::binary);
|
|
input_->reset();
|
|
}
|
|
|
|
interrupt_ = false;
|
|
while (!interrupt_ && !f->eof()) {
|
|
f->read(buffer, BufferSize);
|
|
const streamsize size = f->gcount();
|
|
if (size == 0)
|
|
break;
|
|
|
|
input_->send(buffer, size);
|
|
|
|
if (size != BufferSize)
|
|
break;
|
|
}
|
|
|
|
input_->end();
|
|
|
|
delete f;
|
|
f = nullptr;
|
|
}
|
|
|
|
void InputFile::stop()
|
|
{
|
|
interrupt_ = true;
|
|
}
|
|
|
|
} // namespace devices
|
|
} // namespace pv
|