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, see <http://www.gnu.org/licenses/>.
20 #include "segment.hpp"
26 using std::lock_guard;
27 using std::recursive_mutex;
32 Segment::Segment(uint64_t samplerate, unsigned int unit_size) :
35 samplerate_(samplerate),
39 lock_guard<recursive_mutex> lock(mutex_);
40 assert(unit_size_ > 0);
45 lock_guard<recursive_mutex> lock(mutex_);
48 uint64_t Segment::get_sample_count() const
50 lock_guard<recursive_mutex> lock(mutex_);
54 const pv::util::Timestamp& Segment::start_time() const
59 double Segment::samplerate() const
64 void Segment::set_samplerate(double samplerate)
66 samplerate_ = samplerate;
69 unsigned int Segment::unit_size() const
74 void Segment::set_capacity(const uint64_t new_capacity)
76 lock_guard<recursive_mutex> lock(mutex_);
78 assert(capacity_ >= sample_count_);
79 if (new_capacity > capacity_) {
80 // If we're out of memory, this will throw std::bad_alloc
81 data_.resize((new_capacity * unit_size_) + sizeof(uint64_t));
82 capacity_ = new_capacity;
86 uint64_t Segment::capacity() const
88 lock_guard<recursive_mutex> lock(mutex_);
92 void Segment::append_data(void *data, uint64_t samples)
94 lock_guard<recursive_mutex> lock(mutex_);
96 assert(capacity_ >= sample_count_);
98 // Ensure there's enough capacity to copy.
99 const uint64_t free_space = capacity_ - sample_count_;
100 if (free_space < samples)
101 set_capacity(sample_count_ + samples);
103 memcpy((uint8_t*)data_.data() + sample_count_ * unit_size_,
104 data, samples * unit_size_);
105 sample_count_ += samples;