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1 | /* | |
2 | * This file is part of the PulseView project. | |
3 | * | |
4 | * Copyright (C) 2012-14 Joel Holdsworth <joel@airwebreathe.org.uk> | |
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 2 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, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #ifndef PULSEVIEW_PV_SIGSESSION_H | |
22 | #define PULSEVIEW_PV_SIGSESSION_H | |
23 | ||
24 | #include <map> | |
25 | #include <memory> | |
26 | #include <mutex> | |
27 | #include <set> | |
28 | #include <string> | |
29 | #include <thread> | |
30 | #include <vector> | |
31 | ||
32 | #include <QObject> | |
33 | #include <QString> | |
34 | ||
35 | #include <libsigrok/libsigrok.h> | |
36 | ||
37 | struct srd_decoder; | |
38 | struct srd_channel; | |
39 | ||
40 | namespace pv { | |
41 | ||
42 | class DeviceManager; | |
43 | ||
44 | namespace data { | |
45 | class Analog; | |
46 | class AnalogSnapshot; | |
47 | class Logic; | |
48 | class LogicSnapshot; | |
49 | class SignalData; | |
50 | } | |
51 | ||
52 | namespace device { | |
53 | class DevInst; | |
54 | } | |
55 | ||
56 | namespace view { | |
57 | class DecodeTrace; | |
58 | class LogicSignal; | |
59 | class Signal; | |
60 | } | |
61 | ||
62 | class SigSession : public QObject | |
63 | { | |
64 | Q_OBJECT | |
65 | ||
66 | public: | |
67 | enum capture_state { | |
68 | Stopped, | |
69 | AwaitingTrigger, | |
70 | Running | |
71 | }; | |
72 | ||
73 | public: | |
74 | SigSession(DeviceManager &device_manager); | |
75 | ||
76 | ~SigSession(); | |
77 | ||
78 | std::shared_ptr<device::DevInst> get_device() const; | |
79 | ||
80 | /** | |
81 | * Sets device instance that will be used in the next capture session. | |
82 | */ | |
83 | void set_device(std::shared_ptr<device::DevInst> dev_inst) | |
84 | throw(QString); | |
85 | ||
86 | void set_file(const std::string &name) | |
87 | throw(QString); | |
88 | ||
89 | void set_default_device(); | |
90 | ||
91 | void release_device(device::DevInst *dev_inst); | |
92 | ||
93 | capture_state get_capture_state() const; | |
94 | ||
95 | void start_capture(std::function<void (const QString)> error_handler); | |
96 | ||
97 | void stop_capture(); | |
98 | ||
99 | std::set< std::shared_ptr<data::SignalData> > get_data() const; | |
100 | ||
101 | std::vector< std::shared_ptr<view::Signal> > | |
102 | get_signals() const; | |
103 | ||
104 | #ifdef ENABLE_DECODE | |
105 | bool add_decoder(srd_decoder *const dec); | |
106 | ||
107 | std::vector< std::shared_ptr<view::DecodeTrace> > | |
108 | get_decode_signals() const; | |
109 | ||
110 | void remove_decode_signal(view::DecodeTrace *signal); | |
111 | #endif | |
112 | ||
113 | private: | |
114 | void set_capture_state(capture_state state); | |
115 | ||
116 | void update_signals(std::shared_ptr<device::DevInst> dev_inst); | |
117 | ||
118 | std::shared_ptr<view::Signal> signal_from_channel( | |
119 | const sr_channel *channel) const; | |
120 | ||
121 | void read_sample_rate(const sr_dev_inst *const sdi); | |
122 | ||
123 | private: | |
124 | void sample_thread_proc(std::shared_ptr<device::DevInst> dev_inst, | |
125 | std::function<void (const QString)> error_handler); | |
126 | ||
127 | void feed_in_header(const sr_dev_inst *sdi); | |
128 | ||
129 | void feed_in_meta(const sr_dev_inst *sdi, | |
130 | const sr_datafeed_meta &meta); | |
131 | ||
132 | void feed_in_frame_begin(); | |
133 | ||
134 | void feed_in_logic(const sr_datafeed_logic &logic); | |
135 | ||
136 | void feed_in_analog(const sr_datafeed_analog &analog); | |
137 | ||
138 | void data_feed_in(const struct sr_dev_inst *sdi, | |
139 | const struct sr_datafeed_packet *packet); | |
140 | ||
141 | static void data_feed_in_proc(const struct sr_dev_inst *sdi, | |
142 | const struct sr_datafeed_packet *packet, void *cb_data); | |
143 | ||
144 | private: | |
145 | DeviceManager &_device_manager; | |
146 | ||
147 | /** | |
148 | * The device instance that will be used in the next capture session. | |
149 | */ | |
150 | std::shared_ptr<device::DevInst> _dev_inst; | |
151 | ||
152 | std::vector< std::shared_ptr<view::DecodeTrace> > _decode_traces; | |
153 | ||
154 | mutable std::mutex _sampling_mutex; | |
155 | capture_state _capture_state; | |
156 | ||
157 | mutable std::mutex _signals_mutex; | |
158 | std::vector< std::shared_ptr<view::Signal> > _signals; | |
159 | ||
160 | mutable std::mutex _data_mutex; | |
161 | std::shared_ptr<data::Logic> _logic_data; | |
162 | std::shared_ptr<data::LogicSnapshot> _cur_logic_snapshot; | |
163 | std::map< const sr_channel*, std::shared_ptr<data::AnalogSnapshot> > | |
164 | _cur_analog_snapshots; | |
165 | ||
166 | std::thread _sampling_thread; | |
167 | ||
168 | Q_SIGNALS: | |
169 | void capture_state_changed(int state); | |
170 | ||
171 | void signals_changed(); | |
172 | ||
173 | void frame_began(); | |
174 | ||
175 | void data_received(); | |
176 | ||
177 | void frame_ended(); | |
178 | ||
179 | private: | |
180 | // TODO: This should not be necessary. Multiple concurrent | |
181 | // sessions should should be supported and it should be | |
182 | // possible to associate a pointer with a sr_session. | |
183 | static SigSession *_session; | |
184 | ||
185 | public: | |
186 | // TODO: Even more of a hack. The libsigrok API now allows for | |
187 | // multiple sessions. However sr_session_* calls are scattered | |
188 | // around the PV architecture and a single SigSession object is | |
189 | // being used across multiple sequential sessions, which are | |
190 | // created and destroyed in other classes in pv::device. This | |
191 | // is a mess. For now just keep a single sr_session pointer here | |
192 | // which we can use for all those scattered calls. | |
193 | static struct sr_session *_sr_session; | |
194 | }; | |
195 | ||
196 | } // namespace pv | |
197 | ||
198 | #endif // PULSEVIEW_PV_SIGSESSION_H |