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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> | |
22 | #include <libsigrokflow/libsigrokflow.hpp> | |
23 | ||
24 | namespace Srf | |
25 | { | |
26 | ||
27 | using namespace std; | |
28 | using namespace std::placeholders; | |
29 | ||
30 | #ifdef HAVE_LIBSIGROKCXX | |
31 | void LegacyCaptureDevice::class_init(Gst::ElementClass<LegacyCaptureDevice> *klass) | |
32 | { | |
33 | klass->set_metadata("sigrok legacy capture device", | |
34 | "Source", "Wrapper for capture devices using legacy libsigrok APIs", | |
35 | "Martin Ling"); | |
36 | ||
37 | klass->add_pad_template(Gst::PadTemplate::create( | |
38 | "src", | |
39 | Gst::PAD_SRC, | |
40 | Gst::PAD_ALWAYS, | |
41 | Gst::Caps::create_any())); | |
42 | } | |
43 | ||
44 | bool LegacyCaptureDevice::register_element(Glib::RefPtr<Gst::Plugin> plugin) | |
45 | { | |
46 | Gst::ElementFactory::register_element(plugin, "sigrok_legacy_capture_device", | |
47 | 0, Gst::register_mm_type<LegacyCaptureDevice>( | |
48 | "sigrok_legacy_capture_device")); | |
49 | ||
50 | return true; | |
51 | } | |
52 | ||
53 | LegacyCaptureDevice::LegacyCaptureDevice(GstElement *gobj) : | |
54 | Glib::ObjectBase(typeid(LegacyCaptureDevice)), | |
55 | CaptureDevice(gobj) | |
56 | { | |
57 | add_pad(src_pad_ = Gst::Pad::create(get_pad_template("src"), "src")); | |
58 | } | |
59 | ||
60 | Glib::RefPtr<LegacyCaptureDevice>LegacyCaptureDevice::create( | |
61 | shared_ptr<sigrok::HardwareDevice> libsigrok_device) | |
62 | { | |
63 | auto element = Gst::ElementFactory::create_element("sigrok_legacy_capture_device"); | |
64 | if (!element) | |
65 | throw runtime_error("Failed to create element - plugin not registered?"); | |
66 | auto device = Glib::RefPtr<LegacyCaptureDevice>::cast_static(element); | |
67 | device->libsigrok_device_ = libsigrok_device; | |
68 | ||
69 | return device; | |
70 | } | |
71 | ||
72 | shared_ptr<sigrok::HardwareDevice> LegacyCaptureDevice::libsigrok_device() | |
73 | { | |
74 | return libsigrok_device_; | |
75 | } | |
76 | ||
77 | Gst::StateChangeReturn LegacyCaptureDevice::change_state_vfunc(Gst::StateChange transition) | |
78 | { | |
79 | switch (transition) { | |
80 | case Gst::STATE_CHANGE_READY_TO_PAUSED: | |
81 | return Gst::StateChangeReturn::STATE_CHANGE_NO_PREROLL; | |
82 | case Gst::STATE_CHANGE_PAUSED_TO_PLAYING: | |
83 | task_ = Gst::Task::create(std::bind(&LegacyCaptureDevice::run_, this)); | |
84 | task_->set_lock(mutex_); | |
85 | src_pad_->set_active(true); | |
86 | task_->start(); | |
87 | return Gst::STATE_CHANGE_SUCCESS; | |
88 | default: | |
89 | return Gst::STATE_CHANGE_SUCCESS; | |
90 | } | |
91 | } | |
92 | ||
93 | void LegacyCaptureDevice::datafeed_callback_( | |
94 | shared_ptr<sigrok::Device> device, | |
95 | shared_ptr<sigrok::Packet> packet) | |
96 | { | |
97 | (void)device; | |
98 | ||
99 | switch (packet->type()->id()) { | |
100 | case SR_DF_LOGIC: { | |
101 | auto logic = static_pointer_cast<sigrok::Logic>(packet->payload()); | |
102 | auto mem = Gst::Memory::create( | |
103 | Gst::MEMORY_FLAG_READONLY, | |
104 | logic->data_pointer(), | |
105 | logic->data_length(), | |
106 | 0, | |
107 | logic->data_length()); | |
108 | auto buf = Gst::Buffer::create(); | |
109 | buf->append_memory(move(mem)); | |
110 | src_pad_->push(move(buf)); | |
111 | break; | |
112 | } | |
113 | case SR_DF_END: | |
114 | session_->stop(); | |
115 | src_pad_->push_event(Gst::EventEos::create()); | |
116 | break; | |
117 | default: | |
118 | break; | |
119 | } | |
120 | } | |
121 | ||
122 | void LegacyCaptureDevice::run_() | |
123 | { | |
124 | session_ = libsigrok_device_->driver()->parent()->create_session(); | |
125 | session_->add_device(libsigrok_device_); | |
126 | session_->add_datafeed_callback(bind(&LegacyCaptureDevice::datafeed_callback_, this, _1, _2)); | |
127 | session_->start(); | |
128 | session_->run(); | |
129 | task_->stop(); | |
130 | } | |
131 | #endif | |
132 | ||
133 | } |