Added LogicSnapshot::get_samples

[pulseview.git] / pv / data / logicsnapshot.cpp

diff --git a/pv/data/logicsnapshot.cpp b/pv/data/logicsnapshot.cpp
index f77690e137d6ced0a17b3f54ba0edf18f3ee1b9d..d32274b3322cb4b02808343dad61f92afee57774 100644 (file)
--- a/pv/data/logicsnapshot.cpp
+++ b/pv/data/logicsnapshot.cpp
@@ -70,6 +70,22 @@ void LogicSnapshot::append_payload(
        append_payload_to_mipmap();
 }
 
+void LogicSnapshot::get_samples(uint8_t *const data,
+       int64_t start_sample, int64_t end_sample) const
+{
+       assert(data);
+       assert(start_sample >= 0);
+       assert(start_sample < (int64_t)_sample_count);
+       assert(end_sample >= 0);
+       assert(end_sample < (int64_t)_sample_count);
+       assert(start_sample <= end_sample);
+
+       lock_guard<recursive_mutex> lock(_mutex);
+
+       const size_t size = (end_sample - start_sample) * _unit_size;
+       memcpy(data, (const uint8_t*)_data + start_sample, size);
+}
+
 void LogicSnapshot::reallocate_mipmap_level(MipMapLevel &m)
 {
        const uint64_t new_data_length = ((m.length + MipMapDataUnit - 1) /