blob: a3e1b1d91c76bd047995407d0f8d80932941e4a4 [file] [log] [blame]
* Copyright (c) 2012 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.
#include "webrtc/base/constructormagic.h"
#include "webrtc/modules/audio_coding/neteq/packet.h"
namespace webrtc {
// Forward declarations.
class DecoderDatabase;
// This class handles splitting of payloads into smaller parts.
// For RED and FEC the splitting is done internally. Other codecs' packets are
// split by calling AudioDecoder::SplitPacket.
class PayloadSplitter {
enum SplitterReturnCodes {
kOK = 0,
kNoSplit = 1,
kFrameSplitError = -2,
kUnknownPayloadType = -3,
kRedLengthMismatch = -4,
kFecSplitError = -5,
PayloadSplitter() {}
virtual ~PayloadSplitter() {}
// Splits each packet in |packet_list| into its separate RED payloads. Each
// RED payload is packetized into a Packet. The original elements in
// |packet_list| are properly deleted, and replaced by the new packets.
// Note that all packets in |packet_list| must be RED payloads, i.e., have
// RED headers according to RFC 2198 at the very beginning of the payload.
// Returns kOK or an error.
virtual int SplitRed(PacketList* packet_list);
// Iterates through |packet_list| and, duplicate each audio payload that has
// FEC as new packet for redundant decoding. The decoder database is needed to
// get information about which payload type each packet contains.
virtual int SplitFec(PacketList* packet_list,
DecoderDatabase* decoder_database);
// Checks all packets in |packet_list|. Packets that are DTMF events or
// comfort noise payloads are kept. Except that, only one single payload type
// is accepted. Any packet with another payload type is discarded.
virtual int CheckRedPayloads(PacketList* packet_list,
const DecoderDatabase& decoder_database);
} // namespace webrtc