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/*
* 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 <vector>
#include <QDebug>
#include <QString>
#include <pv/globalsettings.hpp>
#include "inputfile.hpp"
using sigrok::InputFormat;
using std::map;
using std::out_of_range;
using std::pair;
using std::shared_ptr;
using std::streamsize;
using std::string;
using std::ifstream;
using std::ios;
using std::vector;
namespace pv {
namespace devices {
// Use a 4MB chunk size for reading a file into memory. Larger values don't
// seem to provide any substancial performance improvements, but can cause
// UI lag and a visually "stuttering" display of the data currently loading.
const streamsize InputFile::BufferSize = (4 * 1024 * 1024);
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)
{
}
InputFile::InputFile(const shared_ptr<sigrok::Context> &context,
QSettings &settings):
File(""),
context_(context),
interrupt_(false)
{
file_name_ = settings.value("filename").toString().toStdString();
QString format_name = settings.value("format").toString();
// Find matching format
const map<string, shared_ptr<InputFormat> > formats = context->input_formats();
try {
format_ = formats.at(format_name.toStdString());
// Restore all saved options
int options = settings.value("options").toInt();
for (int i = 0; i < options; i++) {
settings.beginGroup("option" + QString::number(i));
QString name = settings.value("name").toString();
options_[name.toStdString()] = GlobalSettings::restore_variantbase(settings);
settings.endGroup();
}
} catch (out_of_range&) {
qWarning() << "Could not find input format" << format_name <<
"needed to restore session input file";
}
}
void InputFile::save_meta_to_settings(QSettings &settings)
{
settings.setValue("filename", QString::fromStdString(file_name_));
settings.setValue("format", QString::fromStdString(format_->name()));
settings.setValue("options", (int)options_.size());
int i = 0;
for (const pair<string, Glib::VariantBase>& option : options_) {
settings.beginGroup("option" + QString::number(i));
settings.setValue("name", QString::fromStdString(option.first));
GlobalSettings::store_variantbase(settings, option.second);
settings.endGroup();
i++;
}
}
void InputFile::open()
{
if (session_)
close();
else
session_ = context_->create_session();
if (!format_)
return;
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);
vector<char> buffer(BufferSize);
f->read(buffer.data(), BufferSize);
const streamsize size = f->gcount();
if (size == 0)
throw QString("Failed to read file");
input_->send(buffer.data(), size);
try {
device_ = input_->device();
} catch (sigrok::Error& e) {
throw e;
}
session_->add_device(device_);
}
void InputFile::close()
{
if (session_)
session_->remove_devices();
}
void InputFile::start()
{
}
void InputFile::run()
{
if (!input_)
return;
if (!f) {
// Previous call to run() processed the entire file already
f = new ifstream(file_name_, ios::binary);
input_->reset();
}
vector<char> buffer(BufferSize);
interrupt_ = false;
while (!interrupt_ && !f->eof()) {
f->read(buffer.data(), BufferSize);
const streamsize size = f->gcount();
if (size == 0)
break;
input_->send(buffer.data(), size);
if (size != BufferSize)
break;
}
input_->end();
delete f;
f = nullptr;
}
void InputFile::stop()
{
interrupt_ = true;
}
} // namespace devices
} // namespace pv
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