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FEC

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This commit is contained in:
Marco van Dijk 2022-04-26 15:40:58 +02:00 • committed by Thulinma
parent bd283fab1d
commit 2485c16dfc
4 changed files with 325 additions and 8 deletions
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37
lib/rtp.h
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@ -29,6 +29,33 @@ namespace RTP{
extern unsigned int PACKET_REORDER_WAIT;
extern unsigned int PACKET_DROP_TIMEOUT;
struct FecData{
public:
uint16_t sequence;
uint32_t timestamp;
uint8_t *bitstring;
};
struct FEC{
public:
bool needsInit;
bool isFirst;
uint16_t maxIndex;
// Track the amount of row/column FEC packets were sent, as they have their own index
uint16_t columnSN;
uint16_t rowSN;
// Determines what row/column of FEC data we are currently on
uint8_t rows;
uint8_t columns;
uint16_t index;
uint16_t lengthRecovery;
uint32_t pktSize;
uint32_t rtpBufSize;
uint32_t bitstringSize;
FecData fecBufferRows; // Stores intermediate results or XOR'd RTP packets
std::map<uint8_t, FecData> fecBufferColumns;
};
/// This class is used to make RTP packets. Currently, H264, and AAC are supported. RTP
/// mechanisms, like increasing sequence numbers and setting timestamps are all taken care of in
/// here.
@ -39,6 +66,8 @@ namespace RTP{
uint32_t maxDataLen; ///< Amount of reserved bytes for the packet(s)
uint32_t sentPackets;
uint32_t sentBytes; // Because ugly is beautiful
bool fecEnabled;
FEC fecContext;
public:
static double startRTCP;
uint32_t getHsize() const;
@ -58,6 +87,14 @@ namespace RTP{
void setTimestamp(uint32_t t);
void increaseSequence();
void initFEC(uint64_t bufSize);
void applyXOR(const uint8_t *in1, const uint8_t *in2, uint8_t *out, uint64_t size);
void generateBitstring(const char *payload, unsigned int payloadlen, uint8_t *bitstring);
bool configureFEC(uint8_t rows, uint8_t columns);
void sendFec(void *socket, FecData *fecData, bool isColumn);
void parseFEC(void *columnSocket, void *rowSocket, uint64_t & bytesSent, const char *payload, unsigned int payloadlen);
void sendNoPacket(unsigned int payloadlen);
void sendTS(void *socket, const char *payload, unsigned int payloadlen);
void sendH264(void *socket, void callBack(void *, const char *, size_t, uint8_t), const char *payload,
unsigned int payloadlen, unsigned int channel, bool lastOfAccessUnit);
void sendVP8(void *socket, void callBack(void *, const char *, size_t, uint8_t),