1 files changed, 57 insertions, 0 deletions
diff --git a/src/audio/pipeline.cpp b/src/audio/pipeline.cpp
new file mode 100644
index 00000000..bab2f3ff
--- /dev/null
+++ b/src/audio/pipeline.cpp
@@ -0,0 +1,57 @@
+#include "pipeline.hpp"
+#include <memory>
+#include "stream_info.hpp"
+
+namespace audio {
+
+Pipeline::Pipeline(IAudioElement* output) : root_(output), subtrees_() {
+  assert(output != nullptr);
+}
+
+Pipeline::~Pipeline() {}
+
+auto Pipeline::AddInput(IAudioElement* input) -> Pipeline* {
+  subtrees_.push_back(std::make_unique<Pipeline>(input));
+  return subtrees_.back().get();
+}
+
+auto Pipeline::OutputElement() const -> IAudioElement* {
+  return root_;
+}
+
+auto Pipeline::NumInputs() const -> std::size_t {
+  return subtrees_.size();
+}
+
+auto Pipeline::InStreams(
+    std::vector<MappableRegion<kPipelineBufferSize>>* regions,
+    std::vector<RawStream>* out) -> void {
+  for (int i = 0; i < subtrees_.size(); i++) {
+    RawStream s = subtrees_[i]->OutStream(&regions->at(i));
+    out->push_back(s);
+  }
+}
+
+auto Pipeline::OutStream(MappableRegion<kPipelineBufferSize>* region)
+    -> RawStream {
+  return {&output_info_, region->Map(output_buffer_)};
+}
+
+auto Pipeline::GetIterationOrder() -> std::vector<Pipeline*> {
+  std::vector<Pipeline*> to_search{this};
+  std::vector<Pipeline*> found;
+
+  while (!to_search.empty()) {
+    Pipeline* current = to_search.back();
+    to_search.pop_back();
+    found.push_back(current);
+
+    for (const auto& i : current->subtrees_) {
+      to_search.push_back(i.get());
+    }
+  }
+
+  return found;
+}
+
+}  // namespace audio