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 MODULES_AUDIO_CODING_NETEQ_RED_PAYLOAD_SPLITTER_H_ 12 #define MODULES_AUDIO_CODING_NETEQ_RED_PAYLOAD_SPLITTER_H_ 13 14 #include "modules/audio_coding/neteq/packet.h" 15 16 namespace webrtc { 17 18 class DecoderDatabase; 19 20 static const size_t kRedHeaderLength = 4; // 4 bytes RED header. 21 static const size_t kRedLastHeaderLength = 22 1; // reduced size for last RED header. 23 // This class handles splitting of RED payloads into smaller parts. 24 // Codec-specific packet splitting can be performed by 25 // AudioDecoder::ParsePayload. 26 class RedPayloadSplitter { 27 public: RedPayloadSplitter()28 RedPayloadSplitter() {} 29 ~RedPayloadSplitter()30 virtual ~RedPayloadSplitter() {} 31 32 RedPayloadSplitter(const RedPayloadSplitter&) = delete; 33 RedPayloadSplitter& operator=(const RedPayloadSplitter&) = delete; 34 35 // Splits each packet in `packet_list` into its separate RED payloads. Each 36 // RED payload is packetized into a Packet. The original elements in 37 // `packet_list` are properly deleted, and replaced by the new packets. 38 // Note that all packets in `packet_list` must be RED payloads, i.e., have 39 // RED headers according to RFC 2198 at the very beginning of the payload. 40 // Returns kOK or an error. 41 virtual bool SplitRed(PacketList* packet_list); 42 43 // Checks all packets in `packet_list`. Packets that are DTMF events or 44 // comfort noise payloads are kept. Except that, only one single payload type 45 // is accepted. Any packet with another payload type is discarded. 46 virtual void CheckRedPayloads(PacketList* packet_list, 47 const DecoderDatabase& decoder_database); 48 }; 49 50 } // namespace webrtc 51 #endif // MODULES_AUDIO_CODING_NETEQ_RED_PAYLOAD_SPLITTER_H_ 52