red_payload_splitter.h (2081B)
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 <cstddef> 15 16 #include "modules/audio_coding/neteq/packet.h" 17 18 namespace webrtc { 19 20 class DecoderDatabase; 21 22 static const size_t kRedHeaderLength = 4; // 4 bytes RED header. 23 static const size_t kRedLastHeaderLength = 24 1; // reduced size for last RED header. 25 // This class handles splitting of RED payloads into smaller parts. 26 // Codec-specific packet splitting can be performed by 27 // AudioDecoder::ParsePayload. 28 class RedPayloadSplitter { 29 public: 30 RedPayloadSplitter() {} 31 32 virtual ~RedPayloadSplitter() {} 33 34 RedPayloadSplitter(const RedPayloadSplitter&) = delete; 35 RedPayloadSplitter& operator=(const RedPayloadSplitter&) = delete; 36 37 // Splits each packet in `packet_list` into its separate RED payloads. Each 38 // RED payload is packetized into a Packet. The original elements in 39 // `packet_list` are properly deleted, and replaced by the new packets. 40 // Note that all packets in `packet_list` must be RED payloads, i.e., have 41 // RED headers according to RFC 2198 at the very beginning of the payload. 42 // Returns kOK or an error. 43 virtual bool SplitRed(PacketList* packet_list); 44 45 // Checks all packets in `packet_list`. Packets that are DTMF events or 46 // comfort noise payloads are kept. Except that, only one single payload type 47 // is accepted. Any packet with another payload type is discarded. 48 virtual void CheckRedPayloads(PacketList* packet_list, 49 const DecoderDatabase& decoder_database); 50 }; 51 52 } // namespace webrtc 53 #endif // MODULES_AUDIO_CODING_NETEQ_RED_PAYLOAD_SPLITTER_H_