decode: Do not overflow the chunk buffer

This should resolve bug #225

diff --git a/pv/data/decoderstack.cpp b/pv/data/decoderstack.cpp
index 5b58761f9c1c3464121299c3c6259a907015a10a..b8eff67ffd02d0dc5ab018806b056b0c9849cf67 100644 (file)
--- a/pv/data/decoderstack.cpp
+++ b/pv/data/decoderstack.cpp
@@ -173,12 +173,13 @@ void DecoderStack::decode_proc(shared_ptr<data::Logic> data)
        const shared_ptr<pv::data::LogicSnapshot> &snapshot =
                snapshots.front();
        const int64_t sample_count = snapshot->get_sample_count() - 1;
+       const unsigned int chunk_sample_count =
+               DecodeChunkLength / snapshot->unit_size();
 
        // Create the session
        srd_session_new(&session);
        assert(session);
 
-
        // Create the decoders
        BOOST_FOREACH(const shared_ptr<decode::Decoder> &dec, _stack)
        {
@@ -209,12 +210,12 @@ void DecoderStack::decode_proc(shared_ptr<data::Logic> data)
        for (int64_t i = 0;
                !boost::this_thread::interruption_requested() &&
                        i < sample_count;
-               i += DecodeChunkLength)
+               i += chunk_sample_count)
        {
                lock_guard<mutex> decode_lock(_global_decode_mutex);
 
                const int64_t chunk_end = min(
-                       i + DecodeChunkLength, sample_count);
+                       i + chunk_sample_count, sample_count);
                snapshot->get_samples(chunk, i, chunk_end);
 
                if (srd_session_send(session, i, i + sample_count,