fix trim tags ordering vs production of samples

moved tags stuff into header thats called
within the existing work input for loops

1 files changed, 85 insertions, 0 deletions

diff --git a/lib/tag_handlers.hpp b/lib/tag_handlers.hpp
new file mode 100644
index 0000000..b49be96
--- /dev/null
+++ b/lib/tag_handlers.hpp
@@ -0,0 +1,85 @@
+//
+// Copyright 2012 Josh Blum
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with io_sig program.  If not, see <http://www.gnu.org/licenses/>.
+
+#ifndef INCLUDED_LIBGRAS_TAG_HANDLERS_HPP
+#define INCLUDED_LIBGRAS_TAG_HANDLERS_HPP
+
+#include "element_impl.hpp"
+#include <algorithm>
+
+namespace gnuradio
+{
+
+GRAS_FORCE_INLINE void ElementImpl::sort_tags(const size_t i)
+{
+    if (not this->input_tags_changed[i]) return;
+    std::vector<Tag> &tags_i = this->input_tags[i];
+    std::sort(tags_i.begin(), tags_i.end(), Tag::offset_compare);
+    this->input_tags_changed[i] = false;
+}
+
+GRAS_FORCE_INLINE void ElementImpl::trim_tags(const tsbe::TaskInterface &task_iface, const size_t i)
+{
+    const size_t num_outputs = task_iface.get_num_outputs();
+
+    //------------------------------------------------------------------
+    //-- trim the input tags that are past the consumption zone
+    //-- and post trimmed tags to the downstream based on policy
+    //------------------------------------------------------------------
+
+    std::vector<Tag> &tags_i = this->input_tags[i];
+    const size_t items_consumed_i = this->items_consumed[i];
+    size_t last = 0;
+    while (last < tags_i.size() and tags_i[last].offset < items_consumed_i)
+    {
+        last++;
+    }
+
+    //follow the tag propagation policy before erasure
+    switch (this->tag_prop_policy)
+    {
+    case Block::TPP_DONT: break; //well that was ez
+    case Block::TPP_ALL_TO_ALL:
+        for (size_t out_i = 0; out_i < num_outputs; out_i++)
+        {
+            for (size_t tag_i = 0; tag_i < last; tag_i++)
+            {
+                Tag t = tags_i[tag_i];
+                t.offset = myullround(t.offset * this->relative_rate);
+                task_iface.post_downstream(out_i, t);
+            }
+        }
+        break;
+    case Block::TPP_ONE_TO_ONE:
+        if (i < num_outputs)
+        {
+            for (size_t tag_i = 0; tag_i < last; tag_i++)
+            {
+                Tag t = tags_i[tag_i];
+                t.offset = myullround(t.offset * this->relative_rate);
+                task_iface.post_downstream(i, t);
+            }
+        }
+        break;
+    };
+
+    //now its safe to perform the erasure
+    if (last != 0) tags_i.erase(tags_i.begin(), tags_i.begin()+last);
+}
+
+} //namespace gnuradio
+
+#endif /*INCLUDED_LIBGRAS_TAG_HANDLERS_HPP*/