X-Git-Url: http://git.code-monkey.de/?a=blobdiff_plain;ds=sidebyside;f=pv%2Flogicdatasnapshot.h;fp=pv%2Flogicdatasnapshot.h;h=21541202d81cfb6afa8114183f141bbb60dee259;hb=51e77110d4316fd0106f8306f5e1f0523c5bf7d7;hp=0000000000000000000000000000000000000000;hpb=8f94be14588c7a7ca0f483b649d7a7b5b5f45ae9;p=pulseview.git

diff --git a/pv/logicdatasnapshot.h b/pv/logicdatasnapshot.h
new file mode 100644
index 0000000..2154120
--- /dev/null
+++ b/pv/logicdatasnapshot.h
@@ -0,0 +1,101 @@
+/*
+ * 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