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Macros | Functions | Variables
rtpdec.c File Reference
#include "libavutil/mathematics.h"
#include "libavutil/avstring.h"
#include "libavutil/time.h"
#include "libavcodec/get_bits.h"
#include "avformat.h"
#include "network.h"
#include "srtp.h"
#include "url.h"
#include "rtpdec.h"
#include "rtpdec_formats.h"

Go to the source code of this file.

Macros

#define MIN_FEEDBACK_INTERVAL   200000 /* 200 ms in us */
 
#define RTP_SEQ_MOD   (1 << 16)
 

Functions

void ff_register_dynamic_payload_handler (RTPDynamicProtocolHandler *handler)
 
void ff_register_rtp_dynamic_payload_handlers (void)
 
RTPDynamicProtocolHandlerff_rtp_handler_find_by_name (const char *name, enum AVMediaType codec_type)
 
RTPDynamicProtocolHandlerff_rtp_handler_find_by_id (int id, enum AVMediaType codec_type)
 
static int rtcp_parse_packet (RTPDemuxContext *s, const unsigned char *buf, int len)
 
static void rtp_init_statistics (RTPStatistics *s, uint16_t base_sequence)
 
static void rtp_init_sequence (RTPStatistics *s, uint16_t seq)
 
static int rtp_valid_packet_in_sequence (RTPStatistics *s, uint16_t seq)
 
static void rtcp_update_jitter (RTPStatistics *s, uint32_t sent_timestamp, uint32_t arrival_timestamp)
 
int ff_rtp_check_and_send_back_rr (RTPDemuxContext *s, URLContext *fd, AVIOContext *avio, int count)
 some rtp servers assume client is dead if they don't hear from them...
 
void ff_rtp_send_punch_packets (URLContext *rtp_handle)
 Send a dummy packet on both port pairs to set up the connection state in potential NAT routers, so that we're able to receive packets.
 
static int find_missing_packets (RTPDemuxContext *s, uint16_t *first_missing, uint16_t *missing_mask)
 
int ff_rtp_send_rtcp_feedback (RTPDemuxContext *s, URLContext *fd, AVIOContext *avio)
 
RTPDemuxContextff_rtp_parse_open (AVFormatContext *s1, AVStream *st, int payload_type, int queue_size)
 open a new RTP parse context for stream 'st'.
 
void ff_rtp_parse_set_dynamic_protocol (RTPDemuxContext *s, PayloadContext *ctx, RTPDynamicProtocolHandler *handler)
 
void ff_rtp_parse_set_crypto (RTPDemuxContext *s, const char *suite, const char *params)
 
static void finalize_packet (RTPDemuxContext *s, AVPacket *pkt, uint32_t timestamp)
 This was the second switch in rtp_parse packet.
 
static int rtp_parse_packet_internal (RTPDemuxContext *s, AVPacket *pkt, const uint8_t *buf, int len)
 
void ff_rtp_reset_packet_queue (RTPDemuxContext *s)
 
static void enqueue_packet (RTPDemuxContext *s, uint8_t *buf, int len)
 
static int has_next_packet (RTPDemuxContext *s)
 
int64_t ff_rtp_queued_packet_time (RTPDemuxContext *s)
 
static int rtp_parse_queued_packet (RTPDemuxContext *s, AVPacket *pkt)
 
static int rtp_parse_one_packet (RTPDemuxContext *s, AVPacket *pkt, uint8_t **bufptr, int len)
 
int ff_rtp_parse_packet (RTPDemuxContext *s, AVPacket *pkt, uint8_t **bufptr, int len)
 Parse an RTP or RTCP packet directly sent as a buffer.
 
void ff_rtp_parse_close (RTPDemuxContext *s)
 
int ff_parse_fmtp (AVFormatContext *s, AVStream *stream, PayloadContext *data, const char *p, int(*parse_fmtp)(AVFormatContext *s, AVStream *stream, PayloadContext *data, char *attr, char *value))
 
int ff_rtp_finalize_packet (AVPacket *pkt, AVIOContext **dyn_buf, int stream_idx)
 Close the dynamic buffer and make a packet from it.
 

Variables

static RTPDynamicProtocolHandler gsm_dynamic_handler
 
static RTPDynamicProtocolHandler realmedia_mp3_dynamic_handler
 
static RTPDynamicProtocolHandler speex_dynamic_handler
 
static RTPDynamicProtocolHandler opus_dynamic_handler
 
static RTPDynamicProtocolHandlerrtp_first_dynamic_payload_handler = NULL
 

Macro Definition Documentation

#define MIN_FEEDBACK_INTERVAL   200000 /* 200 ms in us */

Definition at line 33 of file rtpdec.c.

Referenced by ff_rtp_send_rtcp_feedback().

#define RTP_SEQ_MOD   (1 << 16)

Definition at line 167 of file rtpdec.c.

Referenced by rtp_init_sequence(), and rtp_valid_packet_in_sequence().

Function Documentation

void ff_register_dynamic_payload_handler ( RTPDynamicProtocolHandler handler)
void ff_register_rtp_dynamic_payload_handlers ( void  )

Definition at line 67 of file rtpdec.c.

Referenced by av_register_all().

RTPDynamicProtocolHandler* ff_rtp_handler_find_by_name ( const char *  name,
enum AVMediaType  codec_type 
)

Definition at line 107 of file rtpdec.c.

RTPDynamicProtocolHandler* ff_rtp_handler_find_by_id ( int  id,
enum AVMediaType  codec_type 
)

Definition at line 119 of file rtpdec.c.

static int rtcp_parse_packet ( RTPDemuxContext s,
const unsigned char *  buf,
int  len 
)
static

Definition at line 131 of file rtpdec.c.

Referenced by rtp_parse_one_packet().

static void rtp_init_statistics ( RTPStatistics s,
uint16_t  base_sequence 
)
static

Definition at line 169 of file rtpdec.c.

Referenced by ff_rtp_parse_open().

static void rtp_init_sequence ( RTPStatistics s,
uint16_t  seq 
)
static

Definition at line 180 of file rtpdec.c.

Referenced by rtp_valid_packet_in_sequence().

static int rtp_valid_packet_in_sequence ( RTPStatistics s,
uint16_t  seq 
)
static

Definition at line 194 of file rtpdec.c.

Referenced by rtp_parse_packet_internal().

static void rtcp_update_jitter ( RTPStatistics s,
uint32_t  sent_timestamp,
uint32_t  arrival_timestamp 
)
static

Definition at line 240 of file rtpdec.c.

Referenced by rtp_parse_one_packet().

int ff_rtp_check_and_send_back_rr ( RTPDemuxContext s,
URLContext fd,
AVIOContext avio,
int  count 
)

some rtp servers assume client is dead if they don't hear from them...

so we send a Receiver Report to the provided URLContext or AVIOContext (we don't have access to the rtcp handle from here)

Definition at line 258 of file rtpdec.c.

void ff_rtp_send_punch_packets ( URLContext rtp_handle)

Send a dummy packet on both port pairs to set up the connection state in potential NAT routers, so that we're able to receive packets.

Note, this only works if the NAT router doesn't remap ports. This isn't a standardized procedure, but it works in many cases in practice.

The same routine is used with RDT too, even if RDT doesn't use normal RTP packets otherwise.

Definition at line 361 of file rtpdec.c.

static int find_missing_packets ( RTPDemuxContext s,
uint16_t *  first_missing,
uint16_t *  missing_mask 
)
static

Definition at line 399 of file rtpdec.c.

Referenced by ff_rtp_send_rtcp_feedback().

int ff_rtp_send_rtcp_feedback ( RTPDemuxContext s,
URLContext fd,
AVIOContext avio 
)

Definition at line 429 of file rtpdec.c.

RTPDemuxContext* ff_rtp_parse_open ( AVFormatContext s1,
AVStream st,
int  payload_type,
int  queue_size 
)

open a new RTP parse context for stream 'st'.

'st' can be NULL for MPEG2-TS streams.

Definition at line 497 of file rtpdec.c.

Referenced by ff_rtsp_open_transport_ctx().

void ff_rtp_parse_set_dynamic_protocol ( RTPDemuxContext s,
PayloadContext ctx,
RTPDynamicProtocolHandler handler 
)

Definition at line 529 of file rtpdec.c.

Referenced by ff_rtsp_open_transport_ctx().

void ff_rtp_parse_set_crypto ( RTPDemuxContext s,
const char *  suite,
const char *  params 
)

Definition at line 536 of file rtpdec.c.

Referenced by ff_rtsp_open_transport_ctx().

static void finalize_packet ( RTPDemuxContext s,
AVPacket pkt,
uint32_t  timestamp 
)
static

This was the second switch in rtp_parse packet.

Normalizes time, if required, sets stream_index, etc.

Definition at line 547 of file rtpdec.c.

Referenced by rtp_parse_one_packet(), and rtp_parse_packet_internal().

static int rtp_parse_packet_internal ( RTPDemuxContext s,
AVPacket pkt,
const uint8_t buf,
int  len 
)
static

Definition at line 582 of file rtpdec.c.

Referenced by rtp_parse_one_packet(), and rtp_parse_queued_packet().

void ff_rtp_reset_packet_queue ( RTPDemuxContext s)

Definition at line 665 of file rtpdec.c.

Referenced by ff_rtp_parse_close(), and rtsp_read_play().

static void enqueue_packet ( RTPDemuxContext s,
uint8_t buf,
int  len 
)
static

Definition at line 678 of file rtpdec.c.

Referenced by rtp_parse_one_packet().

static int has_next_packet ( RTPDemuxContext s)
static

Definition at line 703 of file rtpdec.c.

Referenced by ff_rtp_parse_packet(), and rtp_parse_queued_packet().

int64_t ff_rtp_queued_packet_time ( RTPDemuxContext s)

Definition at line 708 of file rtpdec.c.

static int rtp_parse_queued_packet ( RTPDemuxContext s,
AVPacket pkt 
)
static

Definition at line 713 of file rtpdec.c.

Referenced by ff_rtp_parse_packet(), and rtp_parse_one_packet().

static int rtp_parse_one_packet ( RTPDemuxContext s,
AVPacket pkt,
uint8_t **  bufptr,
int  len 
)
static

Definition at line 735 of file rtpdec.c.

Referenced by ff_rtp_parse_packet().

int ff_rtp_parse_packet ( RTPDemuxContext s,
AVPacket pkt,
uint8_t **  bufptr,
int  len 
)

Parse an RTP or RTCP packet directly sent as a buffer.

Parameters
sRTP parse context.
pktreturned packet
bufptrpointer to the input buffer or NULL to read the next packets
lenbuffer len
Returns
0 if a packet is returned, 1 if a packet is returned and more can follow (use buf as NULL to read the next). -1 if no packet (error or no more packet).

Definition at line 818 of file rtpdec.c.

void ff_rtp_parse_close ( RTPDemuxContext s)

Definition at line 831 of file rtpdec.c.

Referenced by ff_rtsp_undo_setup().

int ff_parse_fmtp ( AVFormatContext s,
AVStream stream,
PayloadContext data,
const char *  p,
int(*)(AVFormatContext *s, AVStream *stream, PayloadContext *data, char *attr, char *value parse_fmtp 
)
int ff_rtp_finalize_packet ( AVPacket pkt,
AVIOContext **  dyn_buf,
int  stream_idx 
)

Close the dynamic buffer and make a packet from it.

Definition at line 876 of file rtpdec.c.

Referenced by h261_handle_packet(), h263_handle_packet(), jpeg_parse_packet(), svq3_parse_packet(), vp8_handle_packet(), and xiph_handle_packet().

Variable Documentation

RTPDynamicProtocolHandler gsm_dynamic_handler
static
Initial value:
= {
.enc_name = "GSM",
.codec_type = AVMEDIA_TYPE_AUDIO,
.codec_id = AV_CODEC_ID_GSM,
}

Definition at line 35 of file rtpdec.c.

RTPDynamicProtocolHandler realmedia_mp3_dynamic_handler
static
Initial value:
= {
.enc_name = "X-MP3-draft-00",
.codec_type = AVMEDIA_TYPE_AUDIO,
.codec_id = AV_CODEC_ID_MP3ADU,
}

Definition at line 41 of file rtpdec.c.

RTPDynamicProtocolHandler speex_dynamic_handler
static
Initial value:
= {
.enc_name = "speex",
.codec_type = AVMEDIA_TYPE_AUDIO,
.codec_id = AV_CODEC_ID_SPEEX,
}

Definition at line 47 of file rtpdec.c.

RTPDynamicProtocolHandler opus_dynamic_handler
static
Initial value:
= {
.enc_name = "opus",
.codec_type = AVMEDIA_TYPE_AUDIO,
.codec_id = AV_CODEC_ID_OPUS,
}

Definition at line 53 of file rtpdec.c.

RTPDynamicProtocolHandler* rtp_first_dynamic_payload_handler = NULL
static

Definition at line 59 of file rtpdec.c.

Referenced by ff_register_dynamic_payload_handler().