X-Git-Url: https://sigrok.org/gitweb/?p=pulseview.git;a=blobdiff_plain;f=pv%2Fdata%2Fsegment.cpp;h=ef555292a61a902fbea973298008f0c0bbcd89d3;hp=a71d49ca6d27b9f2098a844b4c425c9fdfe765f3;hb=50e56db003055e96c5a12e675889e4afad07b65c;hpb=65c92359634f672e5f472a5214719dabc7e20883

diff --git a/pv/data/segment.cpp b/pv/data/segment.cpp
index a71d49ca..ef555292 100644
--- a/pv/data/segment.cpp
+++ b/pv/data/segment.cpp
@@ -54,7 +54,7 @@ Segment::Segment(uint32_t segment_id, uint64_t samplerate, unsigned int unit_siz
 	chunk_size_ = min(MaxChunkSize, (MaxChunkSize / unit_size_) * unit_size_);
 
 	// Create the initial chunk
-	current_chunk_ = new uint8_t[chunk_size_];
+	current_chunk_ = new uint8_t[chunk_size_ + 7];  /* FIXME +7 is workaround for #1284 */
 	data_chunks_.push_back(current_chunk_);
 	used_samples_ = 0;
 	unused_samples_ = chunk_size_ / unit_size_;
@@ -121,7 +121,7 @@ void Segment::free_unused_memory()
 
 	if (current_chunk_) {
 		// No more data will come in, so re-create the last chunk accordingly
-		uint8_t* resized_chunk = new uint8_t[used_samples_ * unit_size_];
+		uint8_t* resized_chunk = new uint8_t[used_samples_ * unit_size_ + 7];  /* FIXME +7 is workaround for #1284 */
 		memcpy(resized_chunk, current_chunk_, used_samples_ * unit_size_);
 
 		delete[] current_chunk_;
@@ -144,7 +144,7 @@ void Segment::append_single_sample(void *data)
 	unused_samples_--;
 
 	if (unused_samples_ == 0) {
-		current_chunk_ = new uint8_t[chunk_size_];
+		current_chunk_ = new uint8_t[chunk_size_ + 7];  /* FIXME +7 is workaround for #1284 */
 		data_chunks_.push_back(current_chunk_);
 		used_samples_ = 0;
 		unused_samples_ = chunk_size_ / unit_size_;
@@ -190,7 +190,7 @@ void Segment::append_samples(void* data, uint64_t samples)
 				// This way, memory allocation will fail early enough to let
 				// PV remain alive. Otherwise, PV will crash in a random
 				// memory-allocating part of the application.
-				current_chunk_ = new uint8_t[chunk_size_];
+				current_chunk_ = new uint8_t[chunk_size_ + 7];  /* FIXME +7 is workaround for #1284 */
 
 				const int dummy_size = 2 * chunk_size_;
 				auto dummy_chunk = new uint8_t[dummy_size];
@@ -289,5 +289,13 @@ uint8_t* Segment::get_iterator_value(SegmentDataIterator* it)
 	return (it->chunk + it->chunk_offs);
 }
 
+uint64_t Segment::get_iterator_valid_length(SegmentDataIterator* it)
+{
+	assert(it->sample_index <= (sample_count_ - 1));
+
+	return ((chunk_size_ - it->chunk_offs) / unit_size_);
+}
+
+
 } // namespace data
 } // namespace pv