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1 | /* |
2 | * This file is part of the libsigrokflow project. | |
3 | * | |
4 | * Copyright (C) 2018 Martin Ling <martin-sigrok@earth.li> | |
5 | * Copyright (C) 2018 Uwe Hermann <uwe@hermann-uwe.de> | |
6 | * | |
7 | * This program is free software: you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation, either version 3 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | ||
21 | #include <config.h> | |
a43e2005 | 22 | #include <libsigrokflow/legacy_capture_device.hpp> |
4f0c2351 UH |
23 | #include <functional> |
24 | #include <memory> | |
25 | #include <stdexcept> | |
26 | #include <utility> | |
a43e2005 | 27 | #include <gstreamermm/private/element_p.h> |
58e83724 UH |
28 | |
29 | namespace Srf | |
30 | { | |
31 | ||
f638442b UH |
32 | using std::move; |
33 | using std::placeholders::_1; | |
34 | using std::placeholders::_2; | |
35 | using std::runtime_error; | |
36 | using std::shared_ptr; | |
37 | using std::static_pointer_cast; | |
58e83724 UH |
38 | |
39 | #ifdef HAVE_LIBSIGROKCXX | |
40 | void LegacyCaptureDevice::class_init(Gst::ElementClass<LegacyCaptureDevice> *klass) | |
41 | { | |
42 | klass->set_metadata("sigrok legacy capture device", | |
43 | "Source", "Wrapper for capture devices using legacy libsigrok APIs", | |
44 | "Martin Ling"); | |
45 | ||
46 | klass->add_pad_template(Gst::PadTemplate::create( | |
47 | "src", | |
48 | Gst::PAD_SRC, | |
49 | Gst::PAD_ALWAYS, | |
50 | Gst::Caps::create_any())); | |
51 | } | |
52 | ||
53 | bool LegacyCaptureDevice::register_element(Glib::RefPtr<Gst::Plugin> plugin) | |
54 | { | |
55 | Gst::ElementFactory::register_element(plugin, "sigrok_legacy_capture_device", | |
56 | 0, Gst::register_mm_type<LegacyCaptureDevice>( | |
57 | "sigrok_legacy_capture_device")); | |
58 | ||
59 | return true; | |
60 | } | |
61 | ||
62 | LegacyCaptureDevice::LegacyCaptureDevice(GstElement *gobj) : | |
63 | Glib::ObjectBase(typeid(LegacyCaptureDevice)), | |
64 | CaptureDevice(gobj) | |
65 | { | |
66 | add_pad(src_pad_ = Gst::Pad::create(get_pad_template("src"), "src")); | |
67 | } | |
68 | ||
69 | Glib::RefPtr<LegacyCaptureDevice>LegacyCaptureDevice::create( | |
70 | shared_ptr<sigrok::HardwareDevice> libsigrok_device) | |
71 | { | |
72 | auto element = Gst::ElementFactory::create_element("sigrok_legacy_capture_device"); | |
73 | if (!element) | |
74 | throw runtime_error("Failed to create element - plugin not registered?"); | |
75 | auto device = Glib::RefPtr<LegacyCaptureDevice>::cast_static(element); | |
76 | device->libsigrok_device_ = libsigrok_device; | |
77 | ||
78 | return device; | |
79 | } | |
80 | ||
81 | shared_ptr<sigrok::HardwareDevice> LegacyCaptureDevice::libsigrok_device() | |
82 | { | |
83 | return libsigrok_device_; | |
84 | } | |
85 | ||
86 | Gst::StateChangeReturn LegacyCaptureDevice::change_state_vfunc(Gst::StateChange transition) | |
87 | { | |
88 | switch (transition) { | |
89 | case Gst::STATE_CHANGE_READY_TO_PAUSED: | |
90 | return Gst::StateChangeReturn::STATE_CHANGE_NO_PREROLL; | |
91 | case Gst::STATE_CHANGE_PAUSED_TO_PLAYING: | |
897cb509 | 92 | task_ = Gst::Task::create(std::bind(&LegacyCaptureDevice::run, this)); |
58e83724 UH |
93 | task_->set_lock(mutex_); |
94 | src_pad_->set_active(true); | |
95 | task_->start(); | |
96 | return Gst::STATE_CHANGE_SUCCESS; | |
97 | default: | |
98 | return Gst::STATE_CHANGE_SUCCESS; | |
99 | } | |
100 | } | |
101 | ||
897cb509 | 102 | void LegacyCaptureDevice::datafeed_callback( |
58e83724 UH |
103 | shared_ptr<sigrok::Device> device, |
104 | shared_ptr<sigrok::Packet> packet) | |
105 | { | |
106 | (void)device; | |
107 | ||
108 | switch (packet->type()->id()) { | |
109 | case SR_DF_LOGIC: { | |
110 | auto logic = static_pointer_cast<sigrok::Logic>(packet->payload()); | |
111 | auto mem = Gst::Memory::create( | |
112 | Gst::MEMORY_FLAG_READONLY, | |
113 | logic->data_pointer(), | |
114 | logic->data_length(), | |
115 | 0, | |
116 | logic->data_length()); | |
117 | auto buf = Gst::Buffer::create(); | |
118 | buf->append_memory(move(mem)); | |
119 | src_pad_->push(move(buf)); | |
120 | break; | |
121 | } | |
122 | case SR_DF_END: | |
123 | session_->stop(); | |
124 | src_pad_->push_event(Gst::EventEos::create()); | |
125 | break; | |
126 | default: | |
127 | break; | |
128 | } | |
129 | } | |
130 | ||
897cb509 | 131 | void LegacyCaptureDevice::run() |
58e83724 UH |
132 | { |
133 | session_ = libsigrok_device_->driver()->parent()->create_session(); | |
134 | session_->add_device(libsigrok_device_); | |
897cb509 | 135 | session_->add_datafeed_callback(bind(&LegacyCaptureDevice::datafeed_callback, this, _1, _2)); |
58e83724 UH |
136 | session_->start(); |
137 | session_->run(); | |
138 | task_->stop(); | |
139 | } | |
140 | #endif | |
141 | ||
142 | } |