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DDVTech 2021-09-10 23:44:31 +02:00 • committed by Thulinma
parent 5b79f296d6
commit fccf66fba2
280 changed files with 56975 additions and 71885 deletions
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42
lib/rtp_fec.h
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@ -21,16 +21,14 @@ namespace RTP{
public:
PacketFEC();
~PacketFEC();
bool initWithREDPacket(
const char *data,
size_t nbytes); /// Initialize using the given data. `data` must point to the first byte of
/// the RTP packet which contains the RED and FEC headers and data.
bool initWithREDPacket(const char *data,
size_t nbytes); /// Initialize using the given data. `data` must point to the first byte of
/// the RTP packet which contains the RED and FEC headers and data.
uint8_t getExtensionFlag(); ///< From fec header: should be 0, see
///< https://tools.ietf.org/html/rfc5109#section-7.3.
uint8_t
getLongMaskFlag(); ///< From fec header: returns 0 when the short mask version is used (16
///< bits), otherwise 1 (48 bits). The mask is used to calculate what
///< sequence numbers are protected, starting at the base sequence number.
uint8_t getLongMaskFlag(); ///< From fec header: returns 0 when the short mask version is used (16
///< bits), otherwise 1 (48 bits). The mask is used to calculate what
///< sequence numbers are protected, starting at the base sequence number.
uint16_t getSequenceBaseNumber(); ///< From fec header: get the base sequence number. The base
///< sequence number is used together with the mask to
///< determine what the sequence numbers of the media packets
@ -44,15 +42,13 @@ namespace RTP{
/// and paylaod.
char *getFECHeader(); ///< Get a pointer to the first byte of the FEC header.
uint16_t getLevel0ProtectionLength(); ///< Get the length of the `getLevel0Payload()`.
uint16_t
getLengthRecovery(); ///< Get the `length recovery` value (Little Endian). This value is used
///< while XORing to recover the length of the missing media packet.
uint16_t getLengthRecovery(); ///< Get the `length recovery` value (Little Endian). This value is used
///< while XORing to recover the length of the missing media packet.
bool coversSequenceNumber(uint16_t sn); ///< Returns true when this `PacketFEC` instance is used
///< to protect the given sequence number.
void
addReceivedSequenceNumber(uint16_t sn); ///< Whenever you receive a media packet (complete) call
///< this as we need to know if enough media packets
///< exist that are needed to recover another one.
void addReceivedSequenceNumber(uint16_t sn); ///< Whenever you receive a media packet (complete) call
///< this as we need to know if enough media packets
///< exist that are needed to recover another one.
void tryToRecoverMissingPacket(
std::map<uint16_t, RTP::Packet> &receivedMediaPackets,
Packet &reconstructedPacket); ///< Pass in a `std::map` indexed by sequence number of -all-
@ -61,19 +57,16 @@ namespace RTP{
///< will fill the packet passed by reference.
private:
bool
extractCoveringSequenceNumbers(); ///< Used internally to fill the `coveredSeqNums` member which
///< tell us what media packets this FEC packet rotects.
bool extractCoveringSequenceNumbers(); ///< Used internally to fill the `coveredSeqNums` member which
///< tell us what media packets this FEC packet rotects.
public:
Util::ResizeablePointer fecPacketData;
Util::ResizeablePointer recoverData;
std::set<uint16_t>
coveredSeqNums; ///< The sequence numbers of the packets that this FEC protects.
std::set<uint16_t>
receivedSeqNums; ///< We keep track of sequence numbers that were received (at some higher
///< level). We can only recover 1 media packet and this is used to check
///< if this `PacketFEC` instance is capable of recovering anything.
std::set<uint16_t> coveredSeqNums; ///< The sequence numbers of the packets that this FEC protects.
std::set<uint16_t> receivedSeqNums; ///< We keep track of sequence numbers that were received (at some higher
///< level). We can only recover 1 media packet and this is used to check
///< if this `PacketFEC` instance is capable of recovering anything.
};
class FECSorter : public Sorter{
@ -97,4 +90,3 @@ namespace RTP{
};
}// namespace RTP