X-Git-Url: https://sigrok.org/gitweb/?p=pulseview.git;a=blobdiff_plain;f=pv%2Fdata%2Fsegment.hpp;h=f5a00c9581530529044cb33d283f52cbb7c1d162;hp=bfb10292f47172edaf1e9cbf4739eb0cc55e8e22;hb=50e56db003055e96c5a12e675889e4afad07b65c;hpb=7a01bd3654ed046216308fa64edfd79be7cd525f

diff --git a/pv/data/segment.hpp b/pv/data/segment.hpp
index bfb10292..f5a00c95 100644
--- a/pv/data/segment.hpp
+++ b/pv/data/segment.hpp
@@ -1,6 +1,7 @@
 /*
  * This file is part of the PulseView project.
  *
+ * Copyright (C) 2017 Soeren Apel <soeren@apelpie.net>
  * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
  *
  * This program is free software; you can redistribute it and/or modify
@@ -14,77 +15,110 @@
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef PULSEVIEW_PV_DATA_SNAPSHOT_HPP
-#define PULSEVIEW_PV_DATA_SNAPSHOT_HPP
+#ifndef PULSEVIEW_PV_DATA_SEGMENT_HPP
+#define PULSEVIEW_PV_DATA_SEGMENT_HPP
+
+#include "pv/util.hpp"
 
-#include <thread>
 #include <mutex>
+#include <thread>
 #include <vector>
 
+#include <QObject>
+
+using std::recursive_mutex;
+using std::vector;
+
+namespace SegmentTest {
+struct SmallSize8Single;
+struct MediumSize8Single;
+struct MaxSize8Single;
+struct MediumSize24Single;
+struct MediumSize32Single;
+struct MaxSize32Single;
+struct MediumSize32Multi;
+struct MaxSize32Multi;
+struct MaxSize32MultiAtOnce;
+struct MaxSize32MultiIterated;
+}  // namespace SegmentTest
+
 namespace pv {
 namespace data {
 
-class Segment
+typedef struct {
+	uint64_t sample_index, chunk_num, chunk_offs;
+	uint8_t* chunk;
+} SegmentDataIterator;
+
+class Segment : public QObject
 {
+	Q_OBJECT
+
+private:
+	static const uint64_t MaxChunkSize;
+
 public:
-	Segment(uint64_t samplerate, unsigned int unit_size);
+	Segment(uint32_t segment_id, uint64_t samplerate, unsigned int unit_size);
 
 	virtual ~Segment();
 
 	uint64_t get_sample_count() const;
 
-	double start_time() const;
+	const pv::util::Timestamp& start_time() const;
 
 	double samplerate() const;
 	void set_samplerate(double samplerate);
 
 	unsigned int unit_size() const;
 
-	/**
-	 * @brief Increase the capacity of the segment.
-	 *
-	 * Increasing the capacity allows samples to be appended without needing
-	 * to reallocate memory.
-	 *
-	 * For the best efficiency @c set_capacity() should be called once before
-	 * @c append_data() is called to set up the segment with the expected number
-	 * of samples that will be appended in total.
-	 *
-	 * @note The capacity will automatically be increased when @c append_data()
-	 * is called if there is not enough capacity in the buffer to store the samples.
-	 *
-	 * @param[in] new_capacity The new capacity of the segment. If this value is
-	 * 	smaller or equal than the current capacity then the method has no effect.
-	 */
-	void set_capacity(uint64_t new_capacity);
-
-	/**
-	 * @brief Get the current capacity of the segment.
-	 *
-	 * The capacity can be increased by calling @c set_capacity().
-	 *
-	 * @return The current capacity of the segment.
-	 */
-	uint64_t capacity() const;
+	uint32_t segment_id() const;
 
-protected:
-	void append_data(void *data, uint64_t samples);
+	void set_complete();
+	bool is_complete() const;
+
+	void free_unused_memory();
 
 protected:
-	mutable std::recursive_mutex mutex_;
-	std::vector<uint8_t> data_;
+	void append_single_sample(void *data);
+	void append_samples(void *data, uint64_t samples);
+	void get_raw_samples(uint64_t start, uint64_t count, uint8_t *dest) const;
+
+	SegmentDataIterator* begin_sample_iteration(uint64_t start);
+	void continue_sample_iteration(SegmentDataIterator* it, uint64_t increase);
+	void end_sample_iteration(SegmentDataIterator* it);
+	uint8_t* get_iterator_value(SegmentDataIterator* it);
+	uint64_t get_iterator_valid_length(SegmentDataIterator* it);
+
+	uint32_t segment_id_;
+	mutable recursive_mutex mutex_;
+	vector<uint8_t*> data_chunks_;
+	uint8_t* current_chunk_;
+	uint64_t used_samples_, unused_samples_;
 	uint64_t sample_count_;
-	double start_time_;
+	pv::util::Timestamp start_time_;
 	double samplerate_;
-	uint64_t capacity_;
+	uint64_t chunk_size_;
 	unsigned int unit_size_;
+	int iterator_count_;
+	bool mem_optimization_requested_;
+	bool is_complete_;
+
+	friend struct SegmentTest::SmallSize8Single;
+	friend struct SegmentTest::MediumSize8Single;
+	friend struct SegmentTest::MaxSize8Single;
+	friend struct SegmentTest::MediumSize24Single;
+	friend struct SegmentTest::MediumSize32Single;
+	friend struct SegmentTest::MaxSize32Single;
+	friend struct SegmentTest::MediumSize32Multi;
+	friend struct SegmentTest::MaxSize32Multi;
+	friend struct SegmentTest::MaxSize32MultiAtOnce;
+	friend struct SegmentTest::MaxSize32MultiIterated;
 };
 
 } // namespace data
 } // namespace pv
 
-#endif // PULSEVIEW_PV_DATA_SNAPSHOT_HPP
+#endif // PULSEVIEW_PV_DATA_SEGMENT_HPP