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rtc: support parse rtp packet extension

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jinxue.cgh 2020-05-19 18:04:36 +08:00 • committed by winlin
parent 69e4a1b5e7
commit 705843b512
2 changed files with 161 additions and 16 deletions
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44
trunk/src/kernel/srs_kernel_rtc_rtp.hpp
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@ -82,6 +82,41 @@ bool srs_seq_is_newer(uint16_t value, uint16_t pre_value);
bool srs_seq_is_rollback(uint16_t value, uint16_t pre_value);
int32_t srs_seq_distance(uint16_t value, uint16_t pre_value);
enum SrsRtpExtensionType : int {
kRtpExtensionNone,
kRtpExtensionTransportSequenceNumber,
kRtpExtensionNumberOfExtensions // Must be the last entity in the enum.
};
struct SrsExtensionInfo {
SrsRtpExtensionType type;
std::string uri;
};
const SrsExtensionInfo kExtensions[] = {
{kRtpExtensionTransportSequenceNumber, std::string("http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01")}
};
class SrsRtpHeaderExtensionMap{
public:
static const SrsRtpExtensionType kInvalidType = kRtpExtensionNone;
static const int kInvalidId = 0;
public:
bool register_by_uri(int id, std::string uri);
SrsRtpExtensionType get_type(int id) const;
public:
SrsRtpHeaderExtensionMap();
virtual ~SrsRtpHeaderExtensionMap();
private:
bool register_id(int id, SrsRtpExtensionType type, std::string uri);
private:
uint8_t ids_[kRtpExtensionNumberOfExtensions];
};
class SrsRtpHeaderExtension{
public:
bool has_transport_sequence_number;
uint16_t transport_sequence_number;
public:
SrsRtpHeaderExtension();
virtual ~SrsRtpHeaderExtension();
};
class SrsRtpHeader
{
private:
@ -95,12 +130,14 @@ private:
uint32_t ssrc;
uint32_t csrc[15];
uint16_t extension_length;
// TODO:extension field.
SrsRtpHeaderExtension header_extension;
public:
SrsRtpHeader();
virtual ~SrsRtpHeader();
private:
srs_error_t parse_extension(SrsBuffer* buf, const SrsRtpHeaderExtensionMap* extension_map);
public:
virtual srs_error_t decode(SrsBuffer* buf);
virtual srs_error_t decode(SrsBuffer* buf, const SrsRtpHeaderExtensionMap* extmap = nullptr);
virtual srs_error_t encode(SrsBuffer* buf);
virtual int nb_bytes();
public:
@ -116,6 +153,7 @@ public:
uint32_t get_ssrc() const;
void set_padding(uint8_t v);
uint8_t get_padding() const;
srs_error_t get_twcc_sequence_number(uint16_t& twcc_sn);
};
class ISrsRtpPayloader : public ISrsCodec
@ -175,7 +213,7 @@ public:
public:
virtual int nb_bytes();
virtual srs_error_t encode(SrsBuffer* buf);
virtual srs_error_t decode(SrsBuffer* buf);
virtual srs_error_t decode(SrsBuffer* buf, const SrsRtpHeaderExtensionMap* extmap = nullptr);
};
// Single payload data.