2 * This file is part of the libsigrokflow project.
4 * Copyright (C) 2018 Uwe Hermann <uwe@hermann-uwe.de>
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
21 #include <libsigrokflow/libsigrokflow.hpp>
29 using namespace std::placeholders;
33 Gst::Plugin::register_static(GST_VERSION_MAJOR, GST_VERSION_MINOR,
34 "sigrok_legacy_capture_device",
35 "Wrapper for capture devices using legacy libsigrok APIs",
36 sigc::ptr_fun(&LegacyCaptureDevice::register_element),
37 "0.01", "GPLv3+", "sigrok", "libsigrokflow", "http://sigrok.org");
40 void LegacyCaptureDevice::class_init(Gst::ElementClass<LegacyCaptureDevice> *klass)
42 klass->set_metadata("sigrok legacy capture device",
43 "Source", "Wrapper for capture devices using legacy libsigrok APIs",
46 klass->add_pad_template(Gst::PadTemplate::create(
50 Gst::Caps::create_any()));
53 bool LegacyCaptureDevice::register_element(Glib::RefPtr<Gst::Plugin> plugin)
55 Gst::ElementFactory::register_element(plugin, "sigrok_legacy_capture_device",
56 0, Gst::register_mm_type<LegacyCaptureDevice>(
57 "sigrok_legacy_capture_device"));
61 LegacyCaptureDevice::LegacyCaptureDevice(GstElement *gobj) :
62 Glib::ObjectBase(typeid(LegacyCaptureDevice)),
65 add_pad(_src_pad = Gst::Pad::create(get_pad_template("src"), "src"));
68 Glib::RefPtr<LegacyCaptureDevice>LegacyCaptureDevice::create(
69 shared_ptr<sigrok::HardwareDevice> libsigrok_device)
71 auto element = Gst::ElementFactory::create_element("sigrok_legacy_capture_device");
73 throw runtime_error("Failed to create element - plugin not registered?");
74 auto device = Glib::RefPtr<LegacyCaptureDevice>::cast_static(element);
75 device->_libsigrok_device = libsigrok_device;
79 shared_ptr<sigrok::HardwareDevice> LegacyCaptureDevice::libsigrok_device()
81 return _libsigrok_device;
84 Gst::StateChangeReturn LegacyCaptureDevice::change_state_vfunc(Gst::StateChange transition)
88 case Gst::STATE_CHANGE_READY_TO_PAUSED:
89 return Gst::StateChangeReturn::STATE_CHANGE_NO_PREROLL;
90 case Gst::STATE_CHANGE_PAUSED_TO_PLAYING:
91 _libsigrok_device->open();
92 _libsigrok_device->config_set(sigrok::ConfigKey::LIMIT_SAMPLES,
93 Glib::Variant<int>::create(10));
94 _task = Gst::Task::create(std::bind(&LegacyCaptureDevice::_run, this));
95 _task->set_lock(_mutex);
96 _src_pad->set_active(true);
98 return Gst::STATE_CHANGE_SUCCESS;
100 return Gst::STATE_CHANGE_SUCCESS;
104 void LegacyCaptureDevice::_datafeed_callback(
105 shared_ptr<sigrok::Device> device,
106 shared_ptr<sigrok::Packet> packet)
109 switch (packet->type()->id()) {
112 auto logic = static_pointer_cast<sigrok::Logic>(packet->payload());
113 auto mem = Gst::Memory::create(
114 Gst::MEMORY_FLAG_READONLY,
115 logic->data_pointer(),
116 logic->data_length(),
118 logic->data_length());
119 auto buf = Gst::Buffer::create();
120 buf->append_memory(move(mem));
121 _src_pad->push(move(buf));
126 _src_pad->push_event(Gst::EventEos::create());
133 void LegacyCaptureDevice::_run()
135 _session = _libsigrok_device->driver()->parent()->create_session();
136 _session->add_device(_libsigrok_device);
137 _session->add_datafeed_callback(bind(&LegacyCaptureDevice::_datafeed_callback, this, _1, _2));