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Extract only the subset of annotations that are in view.
[pulseview.git] / pv / data / decoderstack.h
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, write to the Free Software
18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
19  */
20
21 #ifndef PULSEVIEW_PV_DATA_DECODERSTACK_H
22 #define PULSEVIEW_PV_DATA_DECODERSTACK_H
23
24 #include "signaldata.h"
25
26 #include <list>
27
28 #include <boost/shared_ptr.hpp>
29 #include <boost/thread.hpp>
30
31 #include <QObject>
32 #include <QString>
33
34 struct srd_decoder;
35 struct srd_probe;
36 struct srd_proto_data;
37
38 namespace DecoderStackTest {
39 class TwoDecoderStack;
40 }
41
42 namespace pv {
43
44 namespace view {
45 class LogicSignal;
46 }
47
48 namespace data {
49
50 namespace decode {
51 class Annotation;
52 class Decoder;
53 }
54
55 class Logic;
56
57 class DecoderStack : public QObject, public SignalData
58 {
59         Q_OBJECT
60
61 private:
62         static const double DecodeMargin;
63         static const double DecodeThreshold;
64         static const int64_t DecodeChunkLength;
65
66 public:
67         DecoderStack(const srd_decoder *const decoder);
68
69         virtual ~DecoderStack();
70
71         const std::list< boost::shared_ptr<decode::Decoder> >& stack() const;
72         void push(boost::shared_ptr<decode::Decoder> decoder);
73         void remove(int index);
74
75         int64_t samples_decoded() const;
76
77         /**
78          * Extracts sorted annotations between two period into a vector.
79          */
80         void get_annotation_subset(
81                 std::vector<pv::data::decode::Annotation> &dest,
82                 uint64_t start_sample, uint64_t end_sample) const;
83
84         QString error_message();
85
86         void clear();
87
88         uint64_t get_max_sample_count() const;
89
90         void begin_decode();
91
92 private:
93         void decode_proc(boost::shared_ptr<data::Logic> data);
94
95         bool index_entry_start_sample_gt(
96                 const uint64_t sample, const size_t index) const;
97         bool index_entry_end_sample_lt(
98                 const size_t index, const uint64_t sample) const;
99         bool index_entry_end_sample_gt(
100                 const uint64_t sample, const size_t index) const;
101
102         void insert_annotation_into_start_index(
103                 const pv::data::decode::Annotation &a,
104                 const size_t storage_offset);
105         void insert_annotation_into_end_index(
106                 const pv::data::decode::Annotation &a,
107                 const size_t storage_offset);
108
109         static void annotation_callback(srd_proto_data *pdata,
110                 void *decoder);
111
112 signals:
113         void new_decode_data();
114
115 private:
116
117         /**
118          * This mutex prevents more than one decode operation occuring
119          * concurrently.
120          * @todo A proper solution should be implemented to allow multiple
121          * decode operations.
122          */
123         static boost::mutex _global_decode_mutex;
124
125         std::list< boost::shared_ptr<decode::Decoder> > _stack;
126
127         mutable boost::mutex _mutex;
128         int64_t _samples_decoded;
129         std::vector<pv::data::decode::Annotation> _annotations;
130
131         /**
132          * _ann_start_index and _ann_end_index contain lists of annotions
133          * (represented by offsets in the _annotations vector), sorted in
134          * ascending ordered by the start_sample and end_sample respectively.
135          */
136         std::vector<size_t> _ann_start_index, _ann_end_index;
137
138         QString _error_message;
139
140         boost::thread _decode_thread;
141
142         friend class DecoderStackTest::TwoDecoderStack;
143 };
144
145 } // namespace data
146 } // namespace pv
147
148 #endif // PULSEVIEW_PV_DATA_DECODERSTACK_H