--- /dev/null
+/*
+ * This file is part of the PulseView project.
+ *
+ * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * 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
+ */
+
+#include "datasnapshot.h"
+
+#include <utility>
+#include <vector>
+
+namespace LogicDataSnapshotTest {
+ class Pow2;
+ class Basic;
+ class LargeData;
+ class Pulses;
+ class LongPulses;
+}
+
+namespace pv {
+
+class LogicDataSnapshot : public DataSnapshot
+{
+private:
+ struct MipMapLevel
+ {
+ uint64_t length;
+ uint64_t data_length;
+ void *data;
+ };
+
+private:
+ static const int ScaleStepCount = 10;
+ static const int MipMapScalePower;
+ static const int MipMapScaleFactor;
+ static const float LogMipMapScaleFactor;
+ static const uint64_t MipMapDataUnit;
+
+public:
+ typedef std::pair<int64_t, bool> EdgePair;
+
+public:
+ LogicDataSnapshot(const sr_datafeed_logic &logic);
+
+ virtual ~LogicDataSnapshot();
+
+ void append_payload(const sr_datafeed_logic &logic);
+
+private:
+ void reallocate_mip_map(MipMapLevel &m);
+
+ void append_payload_to_mipmap();
+
+public:
+ uint64_t get_sample(uint64_t index) const;
+
+ /**
+ * Parses a logic data snapshot to generate a list of transitions
+ * in a time interval to a given level of detail.
+ * @param[out] edges The vector to place the edges into.
+ * @param[in] start The start sample index.
+ * @param[in] end The end sample index.
+ * @param[in] min_length The minimum number of samples that
+ * can be resolved at this level of detail.
+ * @param[in] sig_index The index of the signal.
+ **/
+ void get_subsampled_edges(std::vector<EdgePair> &edges,
+ int64_t start, int64_t end,
+ float min_length, int sig_index);
+
+private:
+ uint64_t get_subsample(int level, uint64_t offset) const;
+
+ static int64_t pow2_ceil(int64_t x, unsigned int power);
+
+private:
+ struct MipMapLevel _mip_map[ScaleStepCount];
+ uint64_t _last_append_sample;
+
+ friend class LogicDataSnapshotTest::Pow2;
+ friend class LogicDataSnapshotTest::Basic;
+ friend class LogicDataSnapshotTest::LargeData;
+ friend class LogicDataSnapshotTest::Pulses;
+ friend class LogicDataSnapshotTest::LongPulses;
+};
+
+} // namespace pv