Motown in-proc streaming framework used to implement media services.

services/media/framework/packet.cc

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/logging.h"
+#include "services/media/framework/allocator.h"
+#include "services/media/framework/packet.h"
+
+namespace mojo {
+namespace media {
+
+class PacketImpl : public Packet {
+ public:
+  PacketImpl(
+      int64_t presentation_time,
+      uint64_t duration,
+      bool end_of_stream,
+      uint64_t size,
+      void* payload,
+      Allocator* allocator) :
+      presentation_time_(presentation_time),
+      duration_(duration),
+      end_of_stream_(end_of_stream),
+      size_(size),
+      payload_(payload),
+      allocator_(allocator) {
+    DCHECK((size == 0) == (payload == nullptr));
+  }
+
+  ~PacketImpl() override {};
+
+  int64_t presentation_time() const override { return presentation_time_; }
+
+  uint64_t duration() const override { return duration_; }
+
+  bool end_of_stream() const override { return end_of_stream_; }
+
+  uint64_t size() const override { return size_; }
+
+  void* payload() const override { return payload_; }
+
+ protected:
+  void Release() override {
+    if (payload_ != nullptr && allocator_ != nullptr) {
+      DCHECK(allocator_);
+      allocator_->ReleasePayloadBuffer(size_, payload_);
+    }
+    delete this;
+  }
+
+ private:
+  int64_t presentation_time_;
+  uint64_t duration_;
+  bool end_of_stream_;
+  uint64_t size_;
+  void* payload_;
+  Allocator* allocator_;
+};
+
+// static
+PacketPtr Packet::Create(
+    int64_t presentation_time,
+    uint64_t duration,
+    bool end_of_stream,
+    uint64_t size,
+    void* payload,
+    Allocator* allocator) {
+  DCHECK(payload == nullptr || allocator != nullptr);
+  return PacketPtr(new PacketImpl(
+      presentation_time,
+      duration,
+      end_of_stream,
+      size,
+      payload,
+      allocator));
+}
+
+// static
+PacketPtr Packet::CreateNoAllocator(
+    int64_t presentation_time,
+    uint64_t duration,
+    bool end_of_stream,
+    uint64_t size,
+    void* payload) {
+  return PacketPtr(new PacketImpl(
+      presentation_time,
+      duration,
+      end_of_stream,
+      size,
+      payload,
+      nullptr));
+}
+
+// static
+PacketPtr Packet::CreateEndOfStream(int64_t presentation_time) {
+  return PacketPtr(new PacketImpl(
+      presentation_time,
+      0, // duration
+      true, // end_of_stream
+      0, // size
+      nullptr, // payload
+      nullptr)); // allocator
+}
+
+}  // namespace media
+}  // namespace mojo