Moved session creation into DevInst objects

[pulseview.git] / pv / device / inputfile.cpp

diff --git a/pv/device/inputfile.cpp b/pv/device/inputfile.cpp
new file mode 100644 (file)
index 0000000..55a0fa5
--- /dev/null
+++ b/pv/device/inputfile.cpp
@@ -0,0 +1,143 @@
+/*
+ * This file is part of the PulseView project.
+ *
+ * Copyright (C) 2014 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#include <cassert>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "inputfile.h"
+
+#include <libsigrok/libsigrok.h>
+
+using std::string;
+
+namespace pv {
+namespace device {
+
+InputFile::InputFile(const std::string &path) :
+       File(path),
+       _input(NULL)
+{
+}
+
+sr_dev_inst* InputFile::dev_inst() const
+{
+       assert(_input);
+       return _input->sdi;
+}
+
+void InputFile::use(SigSession *owner) throw(QString)
+{
+       assert(!_input);
+
+       _input = load_input_file_format(_path, NULL);
+       File::use(owner);
+
+       sr_session_new();
+
+       if (sr_session_dev_add(_input->sdi) != SR_OK)
+               throw tr("Failed to add session device.");
+}
+
+void InputFile::release()
+{
+       if (!_owner)
+               return;
+
+       assert(_input);
+       File::release();
+       sr_dev_close(_input->sdi);
+       sr_session_destroy();
+       _input = NULL;
+}
+
+sr_input_format* InputFile::determine_input_file_format(
+       const string &filename)
+{
+       int i;
+
+       /* If there are no input formats, return NULL right away. */
+       sr_input_format *const *const inputs = sr_input_list();
+       if (!inputs) {
+               g_critical("No supported input formats available.");
+               return NULL;
+       }
+
+       /* Otherwise, try to find an input module that can handle this file. */
+       for (i = 0; inputs[i]; i++) {
+               if (inputs[i]->format_match(filename.c_str()))
+                       break;
+       }
+
+       /* Return NULL if no input module wanted to touch this. */
+       if (!inputs[i]) {
+               g_critical("Error: no matching input module found.");
+               return NULL;
+       }
+
+       return inputs[i];
+}
+
+sr_input* InputFile::load_input_file_format(const string &filename,
+       sr_input_format *format)
+{
+       struct stat st;
+       sr_input *in;
+
+       if (!format && !(format =
+               determine_input_file_format(filename.c_str()))) {
+               /* The exact cause was already logged. */
+               throw tr("Failed to load file");
+       }
+
+       if (stat(filename.c_str(), &st) == -1)
+               throw tr("Failed to load file");
+
+       /* Initialize the input module. */
+       if (!(in = new sr_input)) {
+               throw tr("Failed to allocate input module.");
+       }
+
+       in->format = format;
+       in->param = NULL;
+       if (in->format->init &&
+               in->format->init(in, filename.c_str()) != SR_OK) {
+               throw tr("Failed to load file");
+       }
+
+       return in;
+}
+
+void InputFile::start()
+{
+}
+
+void InputFile::run()
+{
+       assert(_input);
+       assert(_input->format);
+       assert(_input->format->loadfile);
+       _input->format->loadfile(_input, _path.c_str());
+}
+
+} // device
+} // pv