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572e76fe UH |
1 | /* |
2 | * This file is part of the libsigrokflow project. | |
3 | * | |
4 | * Copyright (C) 2018 Uwe Hermann <uwe@hermann-uwe.de> | |
5 | * | |
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. | |
10 | * | |
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. | |
15 | * | |
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/>. | |
18 | */ | |
19 | ||
20 | #include <config.h> | |
21 | #include <libsigrokflow/libsigrokflow.hpp> | |
22 | ||
f7363af1 ML |
23 | #include <iostream> |
24 | ||
b903bb0a UH |
25 | namespace Srf |
26 | { | |
27 | ||
f7363af1 | 28 | using namespace std; |
d03b3a98 | 29 | using namespace std::placeholders; |
f7363af1 | 30 | |
b903bb0a UH |
31 | void init() |
32 | { | |
6d71d36a ML |
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), | |
97513ff0 | 37 | "0.01", "GPL", "sigrok", "libsigrokflow", "http://sigrok.org"); |
6d71d36a ML |
38 | } |
39 | ||
4b7d782a ML |
40 | GstBlock::GstBlock(GstElement *gobj) : |
41 | Gst::Element(gobj) | |
42 | { | |
43 | } | |
44 | ||
45 | Device::Device(GstElement *gobj) : | |
46 | GstBlock(gobj) | |
47 | { | |
48 | } | |
49 | ||
50 | CaptureDevice::CaptureDevice(GstElement *gobj) : | |
51 | Device(gobj) | |
52 | { | |
53 | } | |
54 | ||
6d71d36a ML |
55 | void LegacyCaptureDevice::class_init(Gst::ElementClass<LegacyCaptureDevice> *klass) |
56 | { | |
57 | klass->set_metadata("sigrok legacy capture device", | |
58 | "Source", "Wrapper for capture devices using legacy libsigrok APIs", | |
59 | "Martin Ling"); | |
60 | ||
61 | klass->add_pad_template(Gst::PadTemplate::create( | |
62 | "src", | |
63 | Gst::PAD_SRC, | |
64 | Gst::PAD_ALWAYS, | |
65 | Gst::Caps::create_any())); | |
66 | } | |
67 | ||
68 | bool LegacyCaptureDevice::register_element(Glib::RefPtr<Gst::Plugin> plugin) | |
69 | { | |
70 | Gst::ElementFactory::register_element(plugin, "sigrok_legacy_capture_device", | |
71 | 0, Gst::register_mm_type<LegacyCaptureDevice>( | |
72 | "sigrok_legacy_capture_device")); | |
73 | return true; | |
74 | } | |
75 | ||
76 | LegacyCaptureDevice::LegacyCaptureDevice(GstElement *gobj) : | |
77 | Glib::ObjectBase(typeid(LegacyCaptureDevice)), | |
78 | CaptureDevice(gobj) | |
79 | { | |
80 | add_pad(_src_pad = Gst::Pad::create(get_pad_template("src"), "src")); | |
b903bb0a UH |
81 | } |
82 | ||
64b0db03 ML |
83 | Glib::RefPtr<LegacyCaptureDevice>LegacyCaptureDevice::create( |
84 | shared_ptr<sigrok::HardwareDevice> libsigrok_device) | |
f7363af1 | 85 | { |
64b0db03 | 86 | auto element = Gst::ElementFactory::create_element("sigrok_legacy_capture_device"); |
d75c9a6a ML |
87 | if (!element) |
88 | throw runtime_error("Failed to create element - plugin not registered?"); | |
64b0db03 | 89 | auto device = Glib::RefPtr<LegacyCaptureDevice>::cast_static(element); |
64b0db03 ML |
90 | device->_libsigrok_device = libsigrok_device; |
91 | return device; | |
f7363af1 ML |
92 | } |
93 | ||
d03b3a98 | 94 | shared_ptr<sigrok::HardwareDevice> LegacyCaptureDevice::libsigrok_device() |
f7363af1 | 95 | { |
64b0db03 | 96 | return _libsigrok_device; |
f7363af1 ML |
97 | } |
98 | ||
d03b3a98 ML |
99 | Gst::StateChangeReturn LegacyCaptureDevice::change_state_vfunc(Gst::StateChange transition) |
100 | { | |
101 | switch (transition) | |
102 | { | |
103 | case Gst::STATE_CHANGE_READY_TO_PAUSED: | |
104 | return Gst::StateChangeReturn::STATE_CHANGE_NO_PREROLL; | |
105 | case Gst::STATE_CHANGE_PAUSED_TO_PLAYING: | |
64b0db03 ML |
106 | _libsigrok_device->open(); |
107 | _libsigrok_device->config_set(sigrok::ConfigKey::LIMIT_SAMPLES, | |
d03b3a98 ML |
108 | Glib::Variant<int>::create(10)); |
109 | _task = Gst::Task::create(std::bind(&LegacyCaptureDevice::_run, this)); | |
110 | _task->set_lock(_mutex); | |
111 | _src_pad->set_active(true); | |
112 | _task->start(); | |
113 | return Gst::STATE_CHANGE_SUCCESS; | |
114 | default: | |
115 | return Gst::STATE_CHANGE_SUCCESS; | |
116 | } | |
117 | } | |
118 | ||
119 | void LegacyCaptureDevice::_datafeed_callback( | |
120 | shared_ptr<sigrok::Device> device, | |
121 | shared_ptr<sigrok::Packet> packet) | |
122 | { | |
123 | (void) device; | |
124 | switch (packet->type()->id()) { | |
125 | case SR_DF_LOGIC: | |
126 | { | |
127 | auto logic = static_pointer_cast<sigrok::Logic>(packet->payload()); | |
128 | auto mem = Gst::Memory::create( | |
129 | Gst::MEMORY_FLAG_READONLY, | |
130 | logic->data_pointer(), | |
131 | logic->data_length(), | |
132 | 0, | |
133 | logic->data_length()); | |
134 | auto buf = Gst::Buffer::create(); | |
135 | buf->append_memory(move(mem)); | |
136 | _src_pad->push(move(buf)); | |
137 | break; | |
138 | } | |
139 | case SR_DF_END: | |
140 | _session->stop(); | |
141 | _src_pad->push_event(Gst::EventEos::create()); | |
142 | break; | |
143 | default: | |
144 | break; | |
145 | } | |
146 | } | |
147 | ||
148 | void LegacyCaptureDevice::_run() | |
149 | { | |
64b0db03 ML |
150 | _session = _libsigrok_device->driver()->parent()->create_session(); |
151 | _session->add_device(_libsigrok_device); | |
d03b3a98 ML |
152 | _session->add_datafeed_callback(bind(&LegacyCaptureDevice::_datafeed_callback, this, _1, _2)); |
153 | _session->start(); | |
154 | _session->run(); | |
155 | _task->stop(); | |
156 | } | |
157 | ||
b903bb0a | 158 | } |