libavformat/rtmppkt.h File Reference

#include "avformat.h"
#include "url.h"

Go to the source code of this file.

Data Structures

struct  RTMPPacket
 structure for holding RTMP packets More...

Defines

#define RTMP_CHANNELS   65599
 maximum possible number of different RTMP channels

Enumerations

enum  RTMPChannel {
  RTMP_NETWORK_CHANNEL = 2, RTMP_SYSTEM_CHANNEL, RTMP_SOURCE_CHANNEL, RTMP_VIDEO_CHANNEL = 8,
  RTMP_AUDIO_CHANNEL
}
 channels used to for RTMP packets with different purposes (i.e. More...
enum  RTMPPacketType {
  RTMP_PT_CHUNK_SIZE = 1, RTMP_PT_BYTES_READ = 3, RTMP_PT_PING, RTMP_PT_SERVER_BW,
  RTMP_PT_CLIENT_BW, RTMP_PT_AUDIO = 8, RTMP_PT_VIDEO, RTMP_PT_FLEX_STREAM = 15,
  RTMP_PT_FLEX_OBJECT, RTMP_PT_FLEX_MESSAGE, RTMP_PT_NOTIFY, RTMP_PT_SHARED_OBJ,
  RTMP_PT_INVOKE, RTMP_PT_METADATA = 22
}
 known RTMP packet types More...
enum  RTMPPacketSize { RTMP_PS_TWELVEBYTES = 0, RTMP_PS_EIGHTBYTES, RTMP_PS_FOURBYTES, RTMP_PS_ONEBYTE }
 possible RTMP packet header sizes More...

Functions

int ff_rtmp_packet_create (RTMPPacket *pkt, int channel_id, RTMPPacketType type, int timestamp, int size)
 Create new RTMP packet with given attributes.
void ff_rtmp_packet_destroy (RTMPPacket *pkt)
 Free RTMP packet.
int ff_rtmp_packet_read (URLContext *h, RTMPPacket *p, int chunk_size, RTMPPacket *prev_pkt)
 Read RTMP packet sent by the server.
int ff_rtmp_packet_write (URLContext *h, RTMPPacket *p, int chunk_size, RTMPPacket *prev_pkt)
 Send RTMP packet to the server.
void ff_rtmp_packet_dump (void *ctx, RTMPPacket *p)
 Print information and contents of RTMP packet.
Functions used to work with the AMF format (which is also used in .flv)
See also:
amf_* funcs in libavformat/flvdec.c


int ff_amf_tag_size (const uint8_t *data, const uint8_t *data_end)
 Calculate number of bytes taken by first AMF entry in data.
int ff_amf_get_field_value (const uint8_t *data, const uint8_t *data_end, const uint8_t *name, uint8_t *dst, int dst_size)
 Retrieve value of given AMF object field in string form.
void ff_amf_write_bool (uint8_t **dst, int val)
 Write boolean value in AMF format to buffer.
void ff_amf_write_number (uint8_t **dst, double num)
 Write number in AMF format to buffer.
void ff_amf_write_string (uint8_t **dst, const char *str)
 Write string in AMF format to buffer.
void ff_amf_write_null (uint8_t **dst)
 Write AMF NULL value to buffer.
void ff_amf_write_object_start (uint8_t **dst)
 Write marker for AMF object to buffer.
void ff_amf_write_field_name (uint8_t **dst, const char *str)
 Write string used as field name in AMF object to buffer.
void ff_amf_write_object_end (uint8_t **dst)
 Write marker for end of AMF object to buffer.


Define Documentation

#define RTMP_CHANNELS   65599

maximum possible number of different RTMP channels

Definition at line 29 of file rtmppkt.h.


Enumeration Type Documentation

channels used to for RTMP packets with different purposes (i.e.

data, network control, remote procedure calls, etc.)

Enumerator:
RTMP_NETWORK_CHANNEL  channel for network-related messages (bandwidth report, ping, etc)
RTMP_SYSTEM_CHANNEL  channel for sending server control messages
RTMP_SOURCE_CHANNEL  channel for sending a/v to server
RTMP_VIDEO_CHANNEL  channel for video data
RTMP_AUDIO_CHANNEL  channel for audio data

Definition at line 35 of file rtmppkt.h.

possible RTMP packet header sizes

Enumerator:
RTMP_PS_TWELVEBYTES  packet has 12-byte header
RTMP_PS_EIGHTBYTES  packet has 8-byte header
RTMP_PS_FOURBYTES  packet has 4-byte header
RTMP_PS_ONEBYTE  packet is really a next chunk of a packet

Definition at line 66 of file rtmppkt.h.

known RTMP packet types

Enumerator:
RTMP_PT_CHUNK_SIZE  chunk size change
RTMP_PT_BYTES_READ  number of bytes read
RTMP_PT_PING  ping
RTMP_PT_SERVER_BW  server bandwidth
RTMP_PT_CLIENT_BW  client bandwidth
RTMP_PT_AUDIO  audio packet
RTMP_PT_VIDEO  video packet
RTMP_PT_FLEX_STREAM  Flex shared stream.
RTMP_PT_FLEX_OBJECT  Flex shared object.
RTMP_PT_FLEX_MESSAGE  Flex shared message.
RTMP_PT_NOTIFY  some notification
RTMP_PT_SHARED_OBJ  shared object
RTMP_PT_INVOKE  invoke some stream action
RTMP_PT_METADATA  FLV metadata.

Definition at line 46 of file rtmppkt.h.


Function Documentation

int ff_amf_get_field_value ( const uint8_t *  data,
const uint8_t *  data_end,
const uint8_t *  name,
uint8_t *  dst,
int  dst_size 
)

Retrieve value of given AMF object field in string form.

Parameters:
data AMF object data
data_end input buffer end
name name of field to retrieve
dst buffer for storing result
dst_size output buffer size
Returns:
0 if search and retrieval succeeded, negative value otherwise

Definition at line 295 of file rtmppkt.c.

Referenced by rtmp_parse_result().

int ff_amf_tag_size ( const uint8_t *  data,
const uint8_t *  data_end 
)

Calculate number of bytes taken by first AMF entry in data.

Parameters:
data input data
data_end input buffer end
Returns:
number of bytes used by first AMF entry

Definition at line 259 of file rtmppkt.c.

Referenced by ff_amf_get_field_value(), ff_amf_tag_contents(), ff_amf_tag_size(), ff_rtmp_packet_dump(), and rtmp_parse_result().

void ff_amf_write_bool ( uint8_t **  dst,
int  val 
)

Write boolean value in AMF format to buffer.

Parameters:
dst pointer to the input buffer (will be modified)
val value to write

Definition at line 30 of file rtmppkt.c.

Referenced by gen_connect().

void ff_amf_write_field_name ( uint8_t **  dst,
const char *  str 
)

Write string used as field name in AMF object to buffer.

Parameters:
dst pointer to the input buffer (will be modified)
str string to write

Definition at line 59 of file rtmppkt.c.

Referenced by gen_connect().

void ff_amf_write_null ( uint8_t **  dst  ) 

Write AMF NULL value to buffer.

Parameters:
dst pointer to the input buffer (will be modified)

Definition at line 49 of file rtmppkt.c.

Referenced by gen_create_stream(), gen_delete_stream(), gen_fcpublish_stream(), gen_fcunpublish_stream(), gen_play(), gen_publish(), and gen_release_stream().

void ff_amf_write_number ( uint8_t **  dst,
double  num 
)

Write number in AMF format to buffer.

Parameters:
dst pointer to the input buffer (will be modified)
num value to write

Definition at line 36 of file rtmppkt.c.

Referenced by gen_connect(), gen_create_stream(), gen_delete_stream(), gen_fcpublish_stream(), gen_fcunpublish_stream(), gen_play(), gen_publish(), and gen_release_stream().

void ff_amf_write_object_end ( uint8_t **  dst  ) 

Write marker for end of AMF object to buffer.

Parameters:
dst pointer to the input buffer (will be modified)

Definition at line 65 of file rtmppkt.c.

Referenced by gen_connect().

void ff_amf_write_object_start ( uint8_t **  dst  ) 

Write marker for AMF object to buffer.

Parameters:
dst pointer to the input buffer (will be modified)

Definition at line 54 of file rtmppkt.c.

Referenced by gen_connect().

void ff_amf_write_string ( uint8_t **  dst,
const char *  str 
)

Write string in AMF format to buffer.

Parameters:
dst pointer to the input buffer (will be modified)
str string to write

Definition at line 42 of file rtmppkt.c.

Referenced by gen_connect(), gen_create_stream(), gen_delete_stream(), gen_fcpublish_stream(), gen_fcunpublish_stream(), gen_play(), gen_publish(), gen_release_stream(), and rtmp_write().

int ff_rtmp_packet_create ( RTMPPacket pkt,
int  channel_id,
RTMPPacketType  type,
int  timestamp,
int  size 
)

Create new RTMP packet with given attributes.

Parameters:
pkt packet
channel_id packet channel ID
type packet type
timestamp packet timestamp
size packet size
Returns:
zero on success, negative value otherwise

Definition at line 233 of file rtmppkt.c.

Referenced by ff_rtmp_packet_read(), gen_bytes_read(), gen_connect(), gen_create_stream(), gen_delete_stream(), gen_fcpublish_stream(), gen_fcunpublish_stream(), gen_play(), gen_pong(), gen_publish(), gen_release_stream(), and rtmp_write().

void ff_rtmp_packet_destroy ( RTMPPacket pkt  ) 

void ff_rtmp_packet_dump ( void *  ctx,
RTMPPacket p 
)

Print information and contents of RTMP packet.

Parameters:
ctx output context
p packet to dump

Definition at line 425 of file rtmppkt.c.

Referenced by rtmp_parse_result().

int ff_rtmp_packet_read ( URLContext h,
RTMPPacket p,
int  chunk_size,
RTMPPacket prev_pkt 
)

Read RTMP packet sent by the server.

Parameters:
h reader context
p packet
chunk_size current chunk size
prev_pkt previously read packet headers for all channels (may be needed for restoring incomplete packet header)
Returns:
number of bytes read on success, negative value otherwise

Definition at line 73 of file rtmppkt.c.

Referenced by get_packet().

int ff_rtmp_packet_write ( URLContext h,
RTMPPacket p,
int  chunk_size,
RTMPPacket prev_pkt 
)

Send RTMP packet to the server.

Parameters:
h reader context
p packet to send
chunk_size current chunk size
prev_pkt previously sent packet headers for all channels (may be used for packet header compressing)
Returns:
number of bytes written on success, negative value otherwise

Definition at line 160 of file rtmppkt.c.

Referenced by gen_bytes_read(), gen_connect(), gen_create_stream(), gen_delete_stream(), gen_fcpublish_stream(), gen_fcunpublish_stream(), gen_play(), gen_pong(), gen_publish(), gen_release_stream(), rtmp_parse_result(), and rtmp_write().


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