Let PacketSource::NextPacket() return an std::unique_ptr

webrtc/modules/audio_coding/neteq/tools/packet_source.h

 /*
  *  Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #ifndef WEBRTC_MODULES_AUDIO_CODING_NETEQ_TOOLS_PACKET_SOURCE_H_
 #define WEBRTC_MODULES_AUDIO_CODING_NETEQ_TOOLS_PACKET_SOURCE_H_
 
 #include <bitset>
+#include <memory>
 
 #include "webrtc/base/constructormagic.h"
 #include "webrtc/modules/audio_coding/neteq/tools/packet.h"
 #include "webrtc/typedefs.h"
 
 namespace webrtc {
 namespace test {
 
 // Interface class for an object delivering RTP packets to test applications.
 class PacketSource {
  public:
   PacketSource() : use_ssrc_filter_(false), ssrc_(0) {}
   virtual ~PacketSource() {}
 
-  // Returns a pointer to the next packet. Returns NULL if the source is
-  // depleted, or if an error occurred.
-  virtual Packet* NextPacket() = 0;
+  // Returns next packet. Returns nullptr if the source is depleted, or if an
+  // error occurred.
+  virtual std::unique_ptr<Packet> NextPacket() = 0;
 
   virtual void FilterOutPayloadType(uint8_t payload_type) {
     filter_.set(payload_type, true);
   }
 
   virtual void SelectSsrc(uint32_t ssrc) {
     use_ssrc_filter_ = true;
     ssrc_ = ssrc;
   }
 
  protected:
   std::bitset<128> filter_;  // Payload type is 7 bits in the RFC.
   // If SSRC filtering discards all packet that do not match the SSRC.
   bool use_ssrc_filter_;  // True when SSRC filtering is active.
   uint32_t ssrc_;  // The selected SSRC. All other SSRCs will be discarded.
 
  private:
   RTC_DISALLOW_COPY_AND_ASSIGN(PacketSource);
 };
 
 }  // namespace test
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_AUDIO_CODING_NETEQ_TOOLS_PACKET_SOURCE_H_