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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::vector;
44 using std::shared_ptr;
45
46 namespace pv {
47 class Session;
48
49 namespace data {
50
51 namespace decode {
52 class Annotation;
53 class Decoder;
54 class Row;
55 }
56
57 class Logic;
58 class LogicSegment;
59 class SignalBase;
60 class SignalData;
61
62 struct DecodeChannel
63 {
64         uint16_t id;  // Also tells which bit within a sample represents this channel
65         const bool is_optional;
66         const pv::data::SignalBase *assigned_signal;
67         const QString name, desc;
68         int initial_pin_state;
69         const shared_ptr<pv::data::decode::Decoder> decoder_;
70         const srd_channel *pdch_;
71 };
72
73 class DecodeSignal : public SignalBase
74 {
75         Q_OBJECT
76
77 private:
78         static const double DecodeMargin;
79         static const double DecodeThreshold;
80         static const int64_t DecodeChunkLength;
81
82 public:
83         DecodeSignal(pv::Session &session);
84         virtual ~DecodeSignal();
85
86         bool is_decode_signal() const;
87         const vector< shared_ptr<data::decode::Decoder> >& decoder_stack() const;
88
89         void stack_decoder(const srd_decoder *decoder);
90         void remove_decoder(int index);
91         bool toggle_decoder_visibility(int index);
92
93         void reset_decode();
94         void begin_decode();
95         QString error_message() const;
96
97         const vector<data::DecodeChannel> get_channels() const;
98         void auto_assign_signals(const shared_ptr<pv::data::decode::Decoder> dec);
99         void assign_signal(const uint16_t channel_id, const SignalBase *signal);
100         int get_assigned_signal_count() const;
101
102         void set_initial_pin_state(const uint16_t channel_id, const int init_state);
103
104         double samplerate() const;
105         const pv::util::Timestamp& start_time() const;
106
107         /**
108          * Returns the number of samples that can be worked on,
109          * i.e. the number of samples where samples are available
110          * for all connected channels.
111          */
112         int64_t get_working_sample_count() const;
113
114         int64_t get_decoded_sample_count() const;
115
116         vector<decode::Row> visible_rows() const;
117
118         /**
119          * Extracts sorted annotations between two period into a vector.
120          */
121         void get_annotation_subset(
122                 vector<pv::data::decode::Annotation> &dest,
123                 const decode::Row &row, uint64_t start_sample,
124                 uint64_t end_sample) const;
125
126         virtual void save_settings(QSettings &settings) const;
127
128         virtual void restore_settings(QSettings &settings);
129
130 private:
131         void update_channel_list();
132
133         void commit_decoder_channels();
134
135         void mux_logic_samples(const int64_t start, const int64_t end);
136
137         void logic_mux_proc();
138
139         void query_input_metadata();
140
141         void decode_data(const int64_t abs_start_samplenum, const int64_t sample_count);
142
143         void decode_proc();
144
145         void start_srd_session();
146         void stop_srd_session();
147
148         void connect_input_notifiers();
149
150         static void annotation_callback(srd_proto_data *pdata, void *decode_signal);
151
152 Q_SIGNALS:
153         void new_annotations();
154         void decode_finished();
155         void channels_updated();
156
157 private Q_SLOTS:
158         void on_capture_state_changed(int state);
159         void on_data_cleared();
160         void on_data_received();
161
162 private:
163         pv::Session &session_;
164
165         vector<data::DecodeChannel> channels_;
166
167         struct srd_session *srd_session_;
168
169         shared_ptr<Logic> logic_mux_data_;
170         shared_ptr<LogicSegment> segment_;
171         bool logic_mux_data_invalid_;
172
173         pv::util::Timestamp start_time_;
174         double samplerate_;
175
176         int64_t samples_decoded_;
177
178         vector< shared_ptr<decode::Decoder> > stack_;
179         map<const decode::Row, decode::RowData> rows_;
180         map<pair<const srd_decoder*, int>, decode::Row> class_rows_;
181
182         mutable mutex input_mutex_, output_mutex_, logic_mux_mutex_;
183         mutable condition_variable decode_input_cond_, logic_mux_cond_;
184         bool frame_complete_;
185
186         std::thread decode_thread_, logic_mux_thread_;
187         atomic<bool> decode_interrupt_, logic_mux_interrupt_;
188
189         QString error_message_;
190 };
191
192 } // namespace data
193 } // namespace pv
194
195 #endif // PULSEVIEW_PV_DATA_DECODESIGNAL_HPP