From: Marcus Comstedt <redacted>
Date: Sun, 26 Feb 2017 13:31:02 +0000 (+0100)
Subject: DecoderStack: Avoid re-feeding old data after wait_for_data()
X-Git-Tag: pulseview-0.4.0~182
X-Git-Url: https://sigrok.org/gitweb/?p=pulseview.git;a=commitdiff_plain;h=e8bb7c69bce723ed2b116598012cf85deb191ba8

DecoderStack: Avoid re-feeding old data after wait_for_data()

This fixes #876 and #850.
---

diff --git a/pv/data/decoderstack.cpp b/pv/data/decoderstack.cpp
index 5402df4f..c5a0e4a7 100644
--- a/pv/data/decoderstack.cpp
+++ b/pv/data/decoderstack.cpp
@@ -301,13 +301,13 @@ optional<int64_t> DecoderStack::wait_for_data() const
 }
 
 void DecoderStack::decode_data(
-	const int64_t sample_count, const unsigned int unit_size,
+	const int64_t abs_start_samplenum, const int64_t sample_count, const unsigned int unit_size,
 	srd_session *const session)
 {
 	const unsigned int chunk_sample_count =
 		DecodeChunkLength / segment_->unit_size();
 
-	for (int64_t i = 0; !interrupt_ && i < sample_count;
+	for (int64_t i = abs_start_samplenum; !interrupt_ && i < sample_count;
 			i += chunk_sample_count) {
 
 		const int64_t chunk_end = min(
@@ -380,8 +380,10 @@ void DecoderStack::decode_proc()
 
 	srd_session_start(session);
 
+	int64_t abs_start_samplenum = 0;
 	do {
-		decode_data(*sample_count, unit_size, session);
+		decode_data(abs_start_samplenum, *sample_count, unit_size, session);
+		abs_start_samplenum = *sample_count;
 	} while (error_message_.isEmpty() && (sample_count = wait_for_data()));
 
 	// Destroy the session
diff --git a/pv/data/decoderstack.hpp b/pv/data/decoderstack.hpp
index 37f7ca88..19a060f2 100644
--- a/pv/data/decoderstack.hpp
+++ b/pv/data/decoderstack.hpp
@@ -113,7 +113,7 @@ public:
 private:
 	boost::optional<int64_t> wait_for_data() const;
 
-	void decode_data(const int64_t sample_count,
+	void decode_data(const int64_t abs_start_samplenum, const int64_t sample_count,
 		const unsigned int unit_size, srd_session *const session);
 
 	void decode_proc();