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1 | /* | |
2 | * This file is part of the PulseView project. | |
3 | * | |
4 | * Copyright (C) 2012 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, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #ifndef PULSEVIEW_PV_DATA_DECODERSTACK_HPP | |
21 | #define PULSEVIEW_PV_DATA_DECODERSTACK_HPP | |
22 | ||
23 | #include "signaldata.hpp" | |
24 | ||
25 | #include <atomic> | |
26 | #include <condition_variable> | |
27 | #include <list> | |
28 | #include <map> | |
29 | #include <memory> | |
30 | #include <thread> | |
31 | ||
32 | #include <boost/optional.hpp> | |
33 | ||
34 | #include <QObject> | |
35 | #include <QString> | |
36 | ||
37 | #include <pv/data/decode/row.hpp> | |
38 | #include <pv/data/decode/rowdata.hpp> | |
39 | #include <pv/util.hpp> | |
40 | ||
41 | using std::atomic; | |
42 | using std::condition_variable; | |
43 | using std::list; | |
44 | using std::map; | |
45 | using std::mutex; | |
46 | using std::pair; | |
47 | using std::shared_ptr; | |
48 | using std::vector; | |
49 | ||
50 | struct srd_decoder; | |
51 | struct srd_decoder_annotation_row; | |
52 | struct srd_channel; | |
53 | struct srd_proto_data; | |
54 | struct srd_session; | |
55 | ||
56 | namespace DecoderStackTest { | |
57 | struct TwoDecoderStack; | |
58 | } | |
59 | ||
60 | namespace pv { | |
61 | ||
62 | class Session; | |
63 | ||
64 | namespace view { | |
65 | class LogicSignal; | |
66 | } | |
67 | ||
68 | namespace data { | |
69 | ||
70 | class LogicSegment; | |
71 | ||
72 | namespace decode { | |
73 | class Annotation; | |
74 | class Decoder; | |
75 | } | |
76 | ||
77 | class Logic; | |
78 | ||
79 | class DecoderStack : public QObject | |
80 | { | |
81 | Q_OBJECT | |
82 | ||
83 | private: | |
84 | static const double DecodeMargin; | |
85 | static const double DecodeThreshold; | |
86 | static const int64_t DecodeChunkLength; | |
87 | static const unsigned int DecodeNotifyPeriod; | |
88 | ||
89 | public: | |
90 | DecoderStack(pv::Session &session, const srd_decoder *const dec); | |
91 | ||
92 | virtual ~DecoderStack(); | |
93 | ||
94 | const list< shared_ptr<decode::Decoder> >& stack() const; | |
95 | void push(shared_ptr<decode::Decoder> decoder); | |
96 | void remove(int index); | |
97 | ||
98 | double samplerate() const; | |
99 | ||
100 | const pv::util::Timestamp& start_time() const; | |
101 | ||
102 | int64_t samples_decoded() const; | |
103 | ||
104 | vector<decode::Row> get_visible_rows() const; | |
105 | ||
106 | /** | |
107 | * Extracts sorted annotations between two period into a vector. | |
108 | */ | |
109 | void get_annotation_subset( | |
110 | vector<pv::data::decode::Annotation> &dest, | |
111 | const decode::Row &row, uint64_t start_sample, | |
112 | uint64_t end_sample) const; | |
113 | ||
114 | QString error_message(); | |
115 | ||
116 | void clear(); | |
117 | ||
118 | uint64_t max_sample_count() const; | |
119 | ||
120 | void begin_decode(); | |
121 | ||
122 | private: | |
123 | boost::optional<int64_t> wait_for_data() const; | |
124 | ||
125 | void decode_data(const int64_t abs_start_samplenum, const int64_t sample_count, | |
126 | const unsigned int unit_size, srd_session *const session); | |
127 | ||
128 | void decode_proc(); | |
129 | ||
130 | static void annotation_callback(srd_proto_data *pdata, void *decoder); | |
131 | ||
132 | private Q_SLOTS: | |
133 | void on_new_frame(); | |
134 | ||
135 | void on_data_received(); | |
136 | ||
137 | void on_frame_ended(); | |
138 | ||
139 | Q_SIGNALS: | |
140 | void new_decode_data(); | |
141 | ||
142 | private: | |
143 | pv::Session &session_; | |
144 | ||
145 | pv::util::Timestamp start_time_; | |
146 | double samplerate_; | |
147 | ||
148 | /** | |
149 | * This mutex prevents more than one thread from accessing | |
150 | * libsigrokdecode concurrently. | |
151 | * @todo A proper solution should be implemented to allow multiple | |
152 | * decode operations in parallel. | |
153 | */ | |
154 | static mutex global_srd_mutex_; | |
155 | ||
156 | list< shared_ptr<decode::Decoder> > stack_; | |
157 | ||
158 | shared_ptr<pv::data::LogicSegment> segment_; | |
159 | ||
160 | mutable mutex input_mutex_; | |
161 | mutable condition_variable input_cond_; | |
162 | int64_t sample_count_; | |
163 | bool frame_complete_; | |
164 | ||
165 | mutable mutex output_mutex_; | |
166 | int64_t samples_decoded_; | |
167 | ||
168 | map<const decode::Row, decode::RowData> rows_; | |
169 | ||
170 | map<pair<const srd_decoder*, int>, decode::Row> class_rows_; | |
171 | ||
172 | QString error_message_; | |
173 | ||
174 | std::thread decode_thread_; | |
175 | atomic<bool> interrupt_; | |
176 | ||
177 | friend struct DecoderStackTest::TwoDecoderStack; | |
178 | }; | |
179 | ||
180 | } // namespace data | |
181 | } // namespace pv | |
182 | ||
183 | #endif // PULSEVIEW_PV_DATA_DECODERSTACK_HPP |