X-Git-Url: https://sigrok.org/gitweb/?p=pulseview.git;a=blobdiff_plain;f=pv%2Fdata%2Fsnapshot.h;h=48879991fbbcc7d4af1d197ea68accba72512699;hp=e99a7a3c8b449e154b3e91740b96b70395096daa;hb=e8d009288de28cb194bc7964f96677c2baf900c9;hpb=9dbb80b0dbc0fc51a11e42f8e10fc72e9b66f694

diff --git a/pv/data/snapshot.h b/pv/data/snapshot.h
index e99a7a3c..48879991 100644
--- a/pv/data/snapshot.h
+++ b/pv/data/snapshot.h
@@ -21,9 +21,9 @@
 #ifndef PULSEVIEW_PV_DATA_SNAPSHOT_H
 #define PULSEVIEW_PV_DATA_SNAPSHOT_H
 
-#include <libsigrok/libsigrok.h>
-
-#include <boost/thread.hpp>
+#include <thread>
+#include <mutex>
+#include <vector>
 
 namespace pv {
 namespace data {
@@ -31,20 +31,50 @@ namespace data {
 class Snapshot
 {
 public:
-	Snapshot(int unit_size);
+	Snapshot(unsigned int unit_size);
 
 	virtual ~Snapshot();
 
-	uint64_t get_sample_count();
+	uint64_t get_sample_count() const;
+
+	unsigned int unit_size() const;
+
+	/**
+	 * @brief Increase the capacity of the snapshot.
+	 *
+	 * 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 snapshot 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 snapshot. 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 snapshot.
+	 *
+	 * The capacity can be increased by calling @c set_capacity().
+	 *
+	 * @return The current capacity of the snapshot.
+	 */
+	uint64_t capacity() const;
 
 protected:
 	void append_data(void *data, uint64_t samples);
 
 protected:
-	mutable boost::recursive_mutex _mutex;
-	void *_data;
+	mutable std::recursive_mutex _mutex;
+	std::vector<uint8_t> _data;
 	uint64_t _sample_count;
-	int _unit_size;
+	uint64_t _capacity;
+	unsigned int _unit_size;
 };
 
 } // namespace data