2 * This file is part of the PulseView project.
4 * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
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.
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.
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
21 #include <libsigrokdecode/libsigrokdecode.h>
23 #include <boost/foreach.hpp>
24 #include <boost/thread/thread.hpp>
30 #include "decoderstack.h"
32 #include <pv/data/logic.h>
33 #include <pv/data/logicsnapshot.h>
34 #include <pv/data/decode/decoder.h>
35 #include <pv/view/logicsignal.h>
36 #include <pv/view/decode/annotation.h>
38 using namespace boost;
44 const double DecoderStack::DecodeMargin = 1.0;
45 const double DecoderStack::DecodeThreshold = 0.2;
46 const int64_t DecoderStack::DecodeChunkLength = 4096;
48 mutex DecoderStack::_global_decode_mutex;
50 DecoderStack::DecoderStack(const srd_decoder *const dec) :
53 _stack.push_back(shared_ptr<decode::Decoder>(
54 new decode::Decoder(dec)));
57 DecoderStack::~DecoderStack()
59 _decode_thread.interrupt();
60 _decode_thread.join();
63 const std::list< boost::shared_ptr<decode::Decoder> >&
64 DecoderStack::stack() const
69 void DecoderStack::push(boost::shared_ptr<decode::Decoder> decoder)
72 _stack.push_back(decoder);
75 void DecoderStack::remove(int index)
77 using pv::data::decode::Decoder;
80 assert(index < (int)_stack.size());
82 // Find the decoder in the stack
83 list< shared_ptr<Decoder> >::iterator iter = _stack.begin();
84 for(int i = 0; i < index; i++, iter++)
85 assert(iter != _stack.end());
91 int64_t DecoderStack::samples_decoded() const
93 lock_guard<mutex> decode_lock(_mutex);
94 return _samples_decoded;
97 const vector<view::decode::Annotation> DecoderStack::annotations() const
99 lock_guard<mutex> lock(_mutex);
103 QString DecoderStack::error_message()
105 lock_guard<mutex> lock(_mutex);
106 return _error_message;
109 void DecoderStack::begin_decode()
111 shared_ptr<pv::view::LogicSignal> logic_signal;
112 shared_ptr<pv::data::Logic> data;
114 _decode_thread.interrupt();
115 _decode_thread.join();
117 _samples_decoded = 0;
119 _annotations.clear();
121 // We get the logic data of the first probe in the list.
122 // This works because we are currently assuming all
123 // LogicSignals have the same data/snapshot
124 BOOST_FOREACH (const shared_ptr<decode::Decoder> &dec, _stack)
125 if (dec && !dec->probes().empty() &&
126 ((logic_signal = (*dec->probes().begin()).second)) &&
127 ((data = logic_signal->logic_data())))
133 // Get the samplerate and start time
134 _start_time = data->get_start_time();
135 _samplerate = data->samplerate();
136 if (_samplerate == 0.0)
139 _decode_thread = boost::thread(&DecoderStack::decode_proc, this,
143 void DecoderStack::clear()
145 _annotations.clear();
148 uint64_t DecoderStack::get_max_sample_count() const
150 if (_annotations.empty())
152 return _annotations.back().end_sample();
155 void DecoderStack::decode_proc(shared_ptr<data::Logic> data)
157 srd_session *session;
158 uint8_t chunk[DecodeChunkLength];
159 srd_decoder_inst *prev_di = NULL;
163 const deque< shared_ptr<pv::data::LogicSnapshot> > &snapshots =
164 data->get_snapshots();
165 if (snapshots.empty())
168 const shared_ptr<pv::data::LogicSnapshot> &snapshot =
170 const int64_t sample_count = snapshot->get_sample_count() - 1;
172 // Create the session
173 srd_session_new(&session);
177 // Create the decoders
178 BOOST_FOREACH(const shared_ptr<decode::Decoder> &dec, _stack)
180 srd_decoder_inst *const di = dec->create_decoder_inst(session);
184 _error_message = tr("Failed to initialise decoder");
185 srd_session_destroy(session);
190 srd_inst_stack (session, prev_di, di);
196 srd_session_metadata_set(session, SRD_CONF_SAMPLERATE,
197 g_variant_new_uint64((uint64_t)_samplerate));
199 srd_pd_output_callback_add(session, SRD_OUTPUT_ANN,
200 DecoderStack::annotation_callback, this);
202 srd_session_start(session);
205 !this_thread::interruption_requested() && i < sample_count;
206 i += DecodeChunkLength)
208 lock_guard<mutex> decode_lock(_global_decode_mutex);
210 const int64_t chunk_end = min(
211 i + DecodeChunkLength, sample_count);
212 snapshot->get_samples(chunk, i, chunk_end);
214 if (srd_session_send(session, i, i + sample_count,
215 chunk, chunk_end - i) != SRD_OK) {
216 _error_message = tr("Failed to initialise decoder");
221 lock_guard<mutex> lock(_mutex);
222 _samples_decoded = chunk_end;
226 // Destroy the session
227 srd_session_destroy(session);
230 void DecoderStack::annotation_callback(srd_proto_data *pdata, void *decoder)
232 using namespace pv::view::decode;
237 DecoderStack *const d = (DecoderStack*)decoder;
239 lock_guard<mutex> lock(d->_mutex);
240 d->_annotations.push_back(Annotation(pdata));
242 d->new_decode_data();