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Fix #831 by saving/restoring the PD channel mapping
[pulseview.git] / pv / data / decodesignal.hpp
1 /*
2  * This file is part of the PulseView project.
3  *
4  * Copyright (C) 2017 Soeren Apel <soeren@apelpie.net>
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, see <http://www.gnu.org/licenses/>.
18  */
19
20 #ifndef PULSEVIEW_PV_DATA_DECODESIGNAL_HPP
21 #define PULSEVIEW_PV_DATA_DECODESIGNAL_HPP
22
23 #include <atomic>
24 #include <condition_variable>
25 #include <unordered_set>
26 #include <vector>
27
28 #include <QSettings>
29 #include <QString>
30
31 #include <libsigrokdecode/libsigrokdecode.h>
32
33 #include <pv/data/decode/row.hpp>
34 #include <pv/data/decode/rowdata.hpp>
35 #include <pv/data/signalbase.hpp>
36 #include <pv/util.hpp>
37
38 using std::atomic;
39 using std::condition_variable;
40 using std::map;
41 using std::mutex;
42 using std::pair;
43 using std::unordered_set;
44 using std::vector;
45 using std::shared_ptr;
46
47 namespace pv {
48 class Session;
49
50 namespace data {
51
52 namespace decode {
53 class Annotation;
54 class Decoder;
55 class Row;
56 }
57
58 class Logic;
59 class LogicSegment;
60 class SignalBase;
61 class SignalData;
62
63 struct DecodeChannel
64 {
65         uint16_t id;  // Also tells which bit within a sample represents this channel
66         const bool is_optional;
67         const pv::data::SignalBase *assigned_signal;
68         const QString name, desc;
69         int initial_pin_state;
70         const shared_ptr<pv::data::decode::Decoder> decoder_;
71         const srd_channel *pdch_;
72 };
73
74 class DecodeSignal : public SignalBase
75 {
76         Q_OBJECT
77
78 private:
79         static const double DecodeMargin;
80         static const double DecodeThreshold;
81         static const int64_t DecodeChunkLength;
82
83 public:
84         DecodeSignal(pv::Session &session);
85         virtual ~DecodeSignal();
86
87         bool is_decode_signal() const;
88         const vector< shared_ptr<data::decode::Decoder> >& decoder_stack() const;
89
90         void stack_decoder(const srd_decoder *decoder);
91         void remove_decoder(int index);
92         bool toggle_decoder_visibility(int index);
93
94         void reset_decode();
95         void begin_decode();
96         QString error_message() const;
97
98         const vector<data::DecodeChannel> get_channels() const;
99         void auto_assign_signals();
100         void assign_signal(const uint16_t channel_id, const SignalBase *signal);
101         int get_assigned_signal_count() const;
102
103         void set_initial_pin_state(const uint16_t channel_id, const int init_state);
104
105         double samplerate() const;
106         const pv::util::Timestamp& start_time() const;
107
108         /**
109          * Returns the number of samples that can be worked on,
110          * i.e. the number of samples where samples are available
111          * for all connected channels.
112          */
113         int64_t get_working_sample_count() const;
114
115         int64_t get_decoded_sample_count() const;
116
117         vector<decode::Row> visible_rows() const;
118
119         /**
120          * Extracts sorted annotations between two period into a vector.
121          */
122         void get_annotation_subset(
123                 vector<pv::data::decode::Annotation> &dest,
124                 const decode::Row &row, uint64_t start_sample,
125                 uint64_t end_sample) const;
126
127         virtual void save_settings(QSettings &settings) const;
128
129         virtual void restore_settings(QSettings &settings);
130
131 private:
132         void update_channel_list();
133
134         void commit_decoder_channels();
135
136         void mux_logic_samples(const int64_t start, const int64_t end);
137
138         void logic_mux_proc();
139
140         void query_input_metadata();
141
142         void decode_data(const int64_t abs_start_samplenum, const int64_t sample_count);
143
144         void decode_proc();
145
146         void start_srd_session();
147         void stop_srd_session();
148
149         void connect_input_notifiers();
150
151         static void annotation_callback(srd_proto_data *pdata, void *decode_signal);
152
153 Q_SIGNALS:
154         void new_annotations();
155         void decode_finished();
156         void channels_updated();
157
158 private Q_SLOTS:
159         void on_capture_state_changed(int state);
160         void on_data_cleared();
161         void on_data_received();
162
163 private:
164         pv::Session &session_;
165
166         vector<data::DecodeChannel> channels_;
167
168         struct srd_session *srd_session_;
169
170         shared_ptr<Logic> logic_mux_data_;
171         shared_ptr<LogicSegment> segment_;
172         bool logic_mux_data_invalid_;
173
174         pv::util::Timestamp start_time_;
175         double samplerate_;
176
177         int64_t samples_decoded_;
178
179         vector< shared_ptr<decode::Decoder> > stack_;
180         map<const decode::Row, decode::RowData> rows_;
181         map<pair<const srd_decoder*, int>, decode::Row> class_rows_;
182
183         /**
184          * This mutex prevents more than one thread from accessing
185          * libsigrokdecode concurrently.
186          * @todo A proper solution should be implemented to allow multiple
187          * decode operations in parallel.
188          */
189         static mutex global_srd_mutex_;
190
191         mutable mutex input_mutex_, output_mutex_, logic_mux_mutex_;
192         mutable condition_variable decode_input_cond_, logic_mux_cond_;
193         bool frame_complete_;
194
195         std::thread decode_thread_, logic_mux_thread_;
196         atomic<bool> decode_interrupt_, logic_mux_interrupt_;
197
198         QString error_message_;
199 };
200
201 } // namespace data
202 } // namespace pv
203
204 #endif // PULSEVIEW_PV_DATA_DECODESIGNAL_HPP