1 files changed, 103 insertions, 0 deletions
diff --git a/lib/topology_handler.cpp b/lib/topology_handler.cpp
new file mode 100644
index 0000000..53c4961
--- /dev/null
+++ b/lib/topology_handler.cpp
@@ -0,0 +1,103 @@
+//
+// 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/>.
+
+#include <gras_impl/block_actor.hpp>
+#include <gras_impl/vector_utils.hpp>
+
+using namespace gnuradio;
+
+void BlockActor::handle_topology(
+    const Apology::WorkerTopologyMessage &,
+    const Theron::Address from
+){
+    MESSAGE_TRACER();
+
+    const size_t num_inputs = this->get_num_inputs();
+    const size_t num_outputs = this->get_num_outputs();
+
+    //call check_topology on block before committing settings
+    this->block_ptr->check_topology(num_inputs, num_outputs);
+
+    //fill the item sizes from the IO signatures
+    fill_item_sizes_from_sig(this->input_items_sizes, block_ptr->input_signature(), num_inputs);
+    fill_item_sizes_from_sig(this->output_items_sizes, block_ptr->output_signature(), num_outputs);
+
+    //resize and fill port properties
+    resize_fill_back(this->input_history_items, num_inputs);
+    resize_fill_back(this->output_multiple_items, num_outputs);
+    resize_fill_grow(this->input_inline_enables, num_inputs, false);
+
+    //resize the bytes consumed/produced
+    resize_fill_grow(this->items_consumed, num_inputs, 0);
+    resize_fill_grow(this->items_produced, num_outputs, 0);
+
+    //resize all work buffers to match current connections
+    this->work_input_items.resize(num_inputs);
+    this->work_output_items.resize(num_outputs);
+    this->work_ninput_items.resize(num_inputs);
+    this->fcast_ninput_items.resize(num_inputs);
+    this->input_items.resize(num_inputs);
+    this->output_items.resize(num_outputs);
+    this->consume_items.resize(num_inputs, 0);
+    this->consume_called.resize(num_inputs, false);
+    this->produce_items.resize(num_outputs, 0);
+    this->input_queues.resize(num_inputs);
+    this->output_queues.resize(num_outputs);
+    this->forecast_enable = num_outputs != 0 and num_inputs != 0;
+
+    this->input_tokens.resize(num_inputs);
+    this->output_tokens.resize(num_outputs);
+    this->output_allocation_hints.resize(num_outputs);
+
+    //resize tags vector to match sizes
+    this->input_tags_changed.resize(num_inputs);
+    this->input_tags.resize(num_inputs);
+
+    //a block looses all connections, allow it to free
+    if (num_inputs == 0 and num_outputs == 0)
+    {
+        this->mark_done();
+    }
+
+    this->topology_init = true;
+    this->handle_update_inputs(UpdateInputsMessage(), Theron::Address());
+
+    this->Send(0, from); //ACK
+}
+
+void BlockActor::handle_update_inputs(
+    const UpdateInputsMessage &,
+    const Theron::Address
+){
+    const size_t num_inputs = this->get_num_inputs();
+    const size_t num_outputs = this->get_num_outputs();
+
+    //impose input reserve requirements based on relative rate and output multiple
+    resize_fill_grow(this->input_multiple_items, num_inputs, 1);
+    for (size_t i = 0; i < num_inputs; i++)
+    {
+        //TODO, this is a little cheap, we only look at output multiple [0]
+        const size_t multiple = (num_outputs)?this->output_multiple_items.front():1;
+        if (this->enable_fixed_rate)
+        {
+            this->input_multiple_items[i] = size_t(std::ceil(multiple/this->relative_rate));
+        }
+        if (this->input_multiple_items[i] == 0) this->input_multiple_items[i] = 1;
+    }
+
+    //init the history comprehension on input queues
+    this->input_queues.init(this->input_history_items, this->input_multiple_items, this->input_items_sizes);
+}