Line data    Source code

       1             : /*
       2             :  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
       3             :  *
       4             :  *  Use of this source code is governed by a BSD-style license
       5             :  *  that can be found in the LICENSE file in the root of the source
       6             :  *  tree. An additional intellectual property rights grant can be found
       7             :  *  in the file PATENTS.  All contributing project authors may
       8             :  *  be found in the AUTHORS file in the root of the source tree.
       9             :  */
      10             : 
      11             : #ifndef WEBRTC_MODULES_AUDIO_CODING_NETEQ_RED_PAYLOAD_SPLITTER_H_
      12             : #define WEBRTC_MODULES_AUDIO_CODING_NETEQ_RED_PAYLOAD_SPLITTER_H_
      13             : 
      14             : #include "webrtc/base/constructormagic.h"
      15             : #include "webrtc/modules/audio_coding/neteq/packet.h"
      16             : 
      17             : namespace webrtc {
      18             : 
      19             : // Forward declarations.
      20             : class DecoderDatabase;
      21             : 
      22             : // This class handles splitting of RED payloads into smaller parts.
      23             : // Codec-specific packet splitting can be performed by
      24             : // AudioDecoder::ParsePayload.
      25             : class RedPayloadSplitter {
      26             :  public:
      27           0 :   RedPayloadSplitter() {}
      28             : 
      29           0 :   virtual ~RedPayloadSplitter() {}
      30             : 
      31             :   // Splits each packet in |packet_list| into its separate RED payloads. Each
      32             :   // RED payload is packetized into a Packet. The original elements in
      33             :   // |packet_list| are properly deleted, and replaced by the new packets.
      34             :   // Note that all packets in |packet_list| must be RED payloads, i.e., have
      35             :   // RED headers according to RFC 2198 at the very beginning of the payload.
      36             :   // Returns kOK or an error.
      37             :   virtual bool SplitRed(PacketList* packet_list);
      38             : 
      39             :   // Checks all packets in |packet_list|. Packets that are DTMF events or
      40             :   // comfort noise payloads are kept. Except that, only one single payload type
      41             :   // is accepted. Any packet with another payload type is discarded.  Returns
      42             :   // the number of discarded packets.
      43             :   virtual int CheckRedPayloads(PacketList* packet_list,
      44             :                                const DecoderDatabase& decoder_database);
      45             : 
      46             :  private:
      47             :   RTC_DISALLOW_COPY_AND_ASSIGN(RedPayloadSplitter);
      48             : };
      49             : 
      50             : }  // namespace webrtc
      51             : #endif  // WEBRTC_MODULES_AUDIO_CODING_NETEQ_RED_PAYLOAD_SPLITTER_H_