Wed Oct 28 11:47:59 2009

Asterisk developer's documentation

File List

Here is a list of all files with brief descriptions:
_private.h [code]Prototypes for public functions only of internal interest,
abstract_jb.c [code]Common implementation-independent jitterbuffer stuff
abstract_jb.h [code]Common implementation-independent jitterbuffer stuff
acl.c [code]Various sorts of access control
acl.h [code]Access Control of various sorts
adpcm_slin_ex.h [code]4-bit ADPCM data, 20 milliseconds worth at 8 kHz
adsi.h [code]ADSI Support (built upon Caller*ID)
adsistub.c [code]
ael_structs.h [code]Structures for AEL - the Asterisk extension language
aes.h [code]
aes_internal.h [code]This file contains the definitions required to use AES in C. See aesopt.h for optimisation details
aescrypt.c [code]This file contains the code for implementing encryption and decryption for AES (Rijndael) for block and key sizes of 16, 24 and 32 bytes. It can optionally be replaced by code written in assembler using NASM. For further details see the file aesopt.h
aeskey.c [code]This file contains the code for implementing the key schedule for AES (Rijndael) for block and key sizes of 16, 24, and 32 bytes. See aesopt.h for further details including optimisation
aesopt.h [code]
aestab.c [code]
agi.h [code]AGI Extension interfaces - Asterisk Gateway Interface
alaw.c [code]A-Law to Signed linear conversion
alaw.h [code]A-Law to Signed linear conversion
app.c [code]Convenient Application Routines
app.h [code]Application convenience functions, designed to give consistent look and feel to Asterisk apps
app_adsiprog.c [code]Program Asterisk ADSI Scripts into phone
app_alarmreceiver.c [code]Central Station Alarm receiver for Ademco Contact ID
app_amd.c [code]Answering machine detection
app_authenticate.c [code]Execute arbitrary authenticate commands
app_cdr.c [code]Applications connected with CDR engine
app_chanisavail.c [code]Check if Channel is Available
app_channelredirect.c [code]ChannelRedirect application
app_chanspy.c [code]ChanSpy: Listen in on any channel
app_controlplayback.c [code]Trivial application to control playback of a sound file
app_dahdibarge.c [code]DAHDI Barge support
app_dahdiras.c [code]Execute an ISDN RAS
app_dahdiscan.c [code]DAHDI Scanner
app_db.c [code]Database access functions
app_dial.c [code]Dial() & retrydial() - Trivial application to dial a channel and send an URL on answer
app_dictate.c [code]Virtual Dictation Machine Application For Asterisk
app_directed_pickup.c [code]Directed Call Pickup Support
app_directory.c [code]Provide a directory of extensions
app_disa.c [code]DISA -- Direct Inward System Access Application
app_dumpchan.c [code]Application to dump channel variables
app_echo.c [code]Echo application -- play back what you hear to evaluate latency
app_exec.c [code]Exec application
app_externalivr.c [code]External IVR application interface
app_fax.c [code]
app_festival.c [code]Connect to festival
app_flash.c [code]App to flash a DAHDI trunk
app_followme.c [code]Find-Me Follow-Me application
app_forkcdr.c [code]Fork CDR application
app_getcpeid.c [code]Get ADSI CPE ID
app_ices.c [code]Stream to an icecast server via ICES (see contrib/asterisk-ices.xml)
app_image.c [code]App to transmit an image
app_ivrdemo.c [code]IVR Demo application
app_jack.c [code]Jack Application
app_macro.c [code]Dial plan macro Implementation
app_meetme.c [code]Meet me conference bridge and Shared Line Appearances
app_milliwatt.c [code]Digital Milliwatt Test
app_minivm.c [code]MiniVoiceMail - A Minimal Voicemail System for Asterisk
app_mixmonitor.c [code]MixMonitor() - Record a call and mix the audio during the recording
app_morsecode.c [code]Morsecode application
app_mp3.c [code]Silly application to play an MP3 file -- uses mpg123
app_nbscat.c [code]Silly application to play an NBScat file -- uses nbscat8k
app_osplookup.c [code]Open Settlement Protocol (OSP) Applications
app_page.c [code]Page() - Paging application
app_parkandannounce.c [code]ParkAndAnnounce application for Asterisk
app_pickupchan.c [code]Pickup a ringing channel
app_playback.c [code]Trivial application to playback a sound file
app_privacy.c [code]Block all calls without Caller*ID, require phone # to be entered
app_queue.c [code]True call queues with optional send URL on answer
app_read.c [code]Trivial application to read a variable
app_readexten.c [code]Trivial application to read an extension into a variable
app_readfile.c [code]ReadFile application -- Reads in a File for you
app_record.c [code]Trivial application to record a sound file
app_rpt.c [code]Radio Repeater / Remote Base program version 0.48 06/13/06
app_sayunixtime.c [code]SayUnixTime application
app_senddtmf.c [code]App to send DTMF digits
app_sendtext.c [code]App to transmit a text message
app_setcallerid.c [code]App to set callerid presentation
app_skel.c [code]Skeleton application
app_sms.c [code]SMS application - ETSI ES 201 912 protocol 1 implementation
app_softhangup.c [code]SoftHangup application
app_speech_utils.c [code]Speech Recognition Utility Applications
app_stack.c [code]Stack applications Gosub, Return, etc
app_system.c [code]Execute arbitrary system commands
app_talkdetect.c [code]Playback a file with audio detect
app_test.c [code]Applications to test connection and produce report in text file
app_transfer.c [code]Transfer a caller
app_url.c [code]App to transmit a URL
app_userevent.c [code]UserEvent application -- send manager event
app_verbose.c [code]Verbose logging application
app_voicemail.c [code]Comedian Mail - Voicemail System
app_waitforring.c [code]Wait for Ring Application
app_waitforsilence.c [code]Wait for Silence
  • Waits for up to 'x' milliseconds of silence, 'y' times
  • WaitForSilence(500,2) will wait for 1/2 second of silence, twice
  • WaitForSilence(1000,1) will wait for 1 second of silence, once
  • WaitForSilence(300,3,10) will wait for 300ms of silence, 3 times, and return after 10sec
app_waituntil.c [code]Sleep until the given epoch
app_while.c [code]While Loop Implementation
app_zapateller.c [code]Playback the special information tone to get rid of telemarketers
ast_expr.h [code]
ast_expr2.c [code]
ast_expr2.h [code]
ast_expr2f.c [code]Dialplan Expression Lexical Scanner
ast_version.h [code]Asterisk version information
astdb.h [code]Persistant data storage (akin to *doze registry)
asterisk.c [code]Top level source file for Asterisk - the Open Source PBX. Implementation of PBX core functions and CLI interface
asterisk.h [code]Asterisk main include file. File version handling, generic pbx functions
astfd.c [code]Debugging routines for file descriptor leaks
astmm.c [code]Memory Management
astmm.h [code]Asterisk memory usage debugging
astobj.h [code]A set of macros implementing objects and containers. Macros are used for maximum performance, to support multiple inheritance, and to be easily integrated into existing structures without additional malloc calls, etc
astobj2.c [code]
astobj2.h [code]
astosp.h [code]Open Settlement Protocol (OSP)
audiohook.c [code]Audiohooks Architecture
audiohook.h [code]Audiohooks Architecture
autoservice.c [code]Automatic channel service routines
buildinfo.c [code]Build timestamp variables
callerid.c [code]CallerID Generation support
callerid.h [code]CallerID (and other GR30) management and generation Includes code and algorithms from the Zapata library
causes.h [code]Internal Asterisk hangup causes
cdr.c [code]Call Detail Record API
cdr.h [code]Call Detail Record API
cdr_adaptive_odbc.c [code]Adaptive ODBC CDR backend
cdr_csv.c [code]Comma Separated Value CDR records
cdr_custom.c [code]Custom Comma Separated Value CDR records
cdr_manager.c [code]Asterisk Call Manager CDR records
cdr_odbc.c [code]ODBC CDR Backend
cdr_pgsql.c [code]PostgreSQL CDR logger
cdr_radius.c [code]RADIUS CDR Support
cdr_sqlite.c [code]Store CDR records in a SQLite database
cdr_sqlite3_custom.c [code]Custom SQLite3 CDR records
cdr_tds.c [code]FreeTDS CDR logger
chan_agent.c [code]Implementation of Agents (proxy channel)
chan_alsa.c [code]ALSA sound card channel driver
chan_console.c [code]Cross-platform console channel driver
chan_dahdi.c [code]DAHDI for Pseudo TDM
chan_features.c [code]Feature Proxy Channel
chan_gtalk.c [code]Gtalk Channel Driver, until google/libjingle works with jingle spec
chan_h323.c [code]This file is part of the chan_h323 driver for Asterisk
chan_iax2.c [code]Implementation of Inter-Asterisk eXchange Version 2
chan_jingle.c [code]Jingle Channel Driver
chan_local.c [code]Local Proxy Channel
chan_mgcp.c [code]Implementation of Media Gateway Control Protocol
chan_misdn.c [code]Chan_misdn channel driver for Asterisk
chan_misdn_config.h [code]Interface to mISDN - Config
chan_nbs.c [code]Network broadcast sound support channel driver
chan_oss.c [code]Channel driver for OSS sound cards
chan_phone.c [code]Generic Linux Telephony Interface driver
chan_sip.c [code]Implementation of Session Initiation Protocol
chan_skinny.c [code]Implementation of the Skinny protocol
chan_unistim.c [code]Chan_unistim channel driver for Asterisk
chan_usbradio.c [code]Channel driver for CM108 USB Cards with Radio Interface
channel.c [code]Channel Management
channel.h [code]General Asterisk PBX channel definitions
chanvars.c [code]Channel Variables
chanvars.h [code]Channel Variables
cli.c [code]Standard Command Line Interface
cli.h [code]Standard Command Line Interface
codec_a_mu.c [code]Codec_a_mu.c - translate between alaw and ulaw directly
codec_adpcm.c [code]Codec_adpcm.c - translate between signed linear and Dialogic ADPCM
codec_alaw.c [code]Codec_alaw.c - translate between signed linear and alaw
codec_dahdi.c [code]Translate between various formats natively through DAHDI transcoding
codec_g722.c [code]Codec_g722.c - translate between signed linear and ITU G.722-64kbps
codec_g726.c [code]Codec_g726.c - translate between signed linear and ITU G.726-32kbps (both RFC3551 and AAL2 codeword packing)
codec_gsm.c [code]Translate between signed linear and Global System for Mobile Communications (GSM)
codec_ilbc.c [code]Translate between signed linear and Internet Low Bitrate Codec
codec_lpc10.c [code]Translate between signed linear and LPC10 (Linear Predictor Code)
codec_resample.c [code]Resample slinear audio
codec_speex.c [code]Translate between signed linear and Speex (Open Codec)
codec_ulaw.c [code]Codec_ulaw.c - translate between signed linear and ulaw
compat.h [code]General Definitions for Asterisk top level program Included by asterisk.h to handle platform-specific issues especially those related to header files
compiler.h [code]Compiler-specific macros and other items
config.c [code]Configuration File Parser
config.h [code]Configuration File Parser
console_board.c [code]
console_gui.c [code]
console_video.c [code]
console_video.h [code]
crypto.h [code]Provide cryptographic signature routines
cryptostub.c [code]Stubs for res_crypto routines
cygload.c [code]Loader for Asterisk under Cygwin/windows. Open the dll, locate main, run
db.c [code]ASTdb Management
devicestate.c [code]Device state management
devicestate.h [code]Device state management
dial.c [code]Dialing API
dial.h [code]Dialing API
DialTone.h [code]8-bit raw data
dns.c [code]DNS Support for Asterisk
dns.h [code]DNS support for Asterisk
dnsmgr.c [code]Background DNS update manager
dnsmgr.h [code]Background DNS update manager
doxyref.h [code]This file generates Doxygen pages from files in the /doc directory of the Asterisk source code tree
dsp.c [code]Convenience Signal Processing routines
dsp.h [code]Convenient Signal Processing routines
dundi-parser.c [code]Distributed Universal Number Discovery (DUNDi)
dundi-parser.h [code]
dundi.h [code]Distributed Universal Number Discovery (DUNDi) See also
eagi-sphinx-test.c [code]
eagi-test.c [code]
ecdisa.h [code]
endian.h [code]Asterisk architecture endianess compatibility definitions
enter.h [code]
enum.c [code]ENUM Support for Asterisk
enum.h [code]DNS and ENUM functions
event.c [code]Internal generic event system
event.h [code]
event_defs.h [code]Generic event system
extconf.h [code]External configuration handlers (realtime and static configuration)
features.c [code]Routines implementing call features as call pickup, parking and transfer
features.h [code]Call Parking and Pickup API Includes code and algorithms from the Zapata library
file.c [code]Generic File Format Support
file.h [code]Generic File Format Support. Should be included by clients of the file handling routines. File service providers should instead include mod_format.h
fixedjitterbuf.c [code]Jitterbuffering algorithm
fixedjitterbuf.h [code]Jitterbuffering algorithm
format_g723.c [code]Old-style G.723.1 frame/timestamp format
format_g726.c [code]Headerless G.726 (16/24/32/40kbps) data format for Asterisk
format_g729.c [code]Save to raw, headerless G729 data
format_gsm.c [code]Save to raw, headerless GSM data
format_h263.c [code]Save to raw, headerless h263 data
format_h264.c [code]Save to raw, headerless h264 data
format_ilbc.c [code]Save to raw, headerless iLBC data
format_jpeg.c [code]JPEG File format support
format_ogg_vorbis.c [code]OGG/Vorbis streams
format_pcm.c [code]Flat, binary, ulaw PCM file format
format_sln.c [code]RAW SLINEAR Format
format_sln16.c [code]RAW SLINEAR 16 Format
format_vox.c [code]Flat, binary, ADPCM vox file format
format_wav.c [code]Work with WAV in the proprietary Microsoft format. Microsoft WAV format (8000hz Signed Linear)
format_wav_gsm.c [code]Save GSM in the proprietary Microsoft format
frame.c [code]Frame and codec manipulation routines
frame.h [code]Asterisk internal frame definitions
fskmodem.c [code]FSK Modem Support
fskmodem.h [code]FSK Modem Support
fskmodem_float.c [code]FSK Modulator/Demodulator
fskmodem_float.h [code]FSK Modem Support
fskmodem_int.c [code]FSK Modulator/Demodulator
fskmodem_int.h [code]FSK Modem Support
func_audiohookinherit.c [code]Audiohook inheritance function
func_base64.c [code]Use the base64 as functions
func_blacklist.c [code]Function to lookup the callerid number, and see if it is blacklisted
func_callerid.c [code]Caller ID related dialplan functions
func_cdr.c [code]Call Detail Record related dialplan functions
func_channel.c [code]Channel info dialplan function
func_curl.c [code]Curl - Load a URL
func_cut.c [code]CUT function
func_db.c [code]Functions for interaction with the Asterisk database
func_devstate.c [code]Manually controlled blinky lights
func_dialgroup.c [code]Dial group dialplan function
func_dialplan.c [code]Dialplan group functions check if a dialplan entry exists
func_enum.c [code]ENUM Functions
func_env.c [code]Environment related dialplan functions
func_extstate.c [code]Get the state of a hinted extension for dialplan control
func_global.c [code]Global variable dialplan functions
func_groupcount.c [code]Channel group related dialplan functions
func_iconv.c [code]Charset conversions
func_lock.c [code]Dialplan mutexes
func_logic.c [code]Conditional logic dialplan functions
func_math.c [code]Math related dialplan function
func_md5.c [code]MD5 digest related dialplan functions
func_module.c [code]Simple module check function
func_odbc.c [code]ODBC lookups
func_rand.c [code]Generate Random Number
func_realtime.c [code]REALTIME dialplan function
func_sha1.c [code]SHA1 digest related dialplan functions
func_shell.c [code]
func_strings.c [code]String manipulation dialplan functions
func_sysinfo.c [code]
func_timeout.c [code]Channel timeout related dialplan functions
func_uri.c [code]URI encoding / decoding
func_version.c [code]Return the current Version strings
func_vmcount.c [code]VMCOUNT dialplan function
func_volume.c [code]Technology independent volume control
g722_slin_ex.h [code]G722_slin_ex.h --
g726_slin_ex.h [code]4-bit G.726 data, 20 milliseconds worth at 8 kHz
global_datastores.c [code]Globally-accessible datastore information and callbacks
global_datastores.h [code]Globally accessible channel datastores
gsm_slin_ex.h [code]8-bit raw data
hashtab.c [code]Code to implement generic hash tables
hashtab.h [code]Generic (perhaps overly so) hashtable implementation Hash Table support in Asterisk
http.c [code]Http server for AMI access
http.h [code]Support for Private Asterisk HTTP Servers
iax2-parser.c [code]Implementation of Inter-Asterisk eXchange Protocol, v 2
iax2-parser.h [code]Implementation of the IAX2 protocol
iax2-provision.c [code]IAX Provisioning Protocol
iax2-provision.h [code]IAX2 Provisioning protocol
iax2.h [code]Implementation of Inter-Asterisk eXchange, version 2 iax2-parser.c iax2-parser.h chan_iax2.c
ie.c [code]Interface to mISDN
ilbc_slin_ex.h [code]Raw 8-bit data
image.c [code]Image Management
image.h [code]General Asterisk channel definitions for image handling
indications.c [code]Tone Management
indications.h [code]BSD Telephony Of Mexico "Tormenta" Tone Zone Support 2/22/01
inline_api.h [code]Inlinable API function macro
io.c [code]I/O Managment (Derived from Cheops-NG)
io.h [code]I/O Management (derived from Cheops-NG)
isdn_lib.c [code]Interface to mISDN
isdn_lib.h [code]Interface to mISDN
isdn_lib_intern.h [code]
isdn_msg_parser.c [code]Interface to mISDN - message parser
jabber.h [code]AJI - The Asterisk Jabber Interface
jingle.h [code]Jingle definitions for chan_jingle
jitterbuf.c [code]Jitterbuf: an application-independent jitterbuffer
jitterbuf.h [code]Jitterbuf: an application-independent jitterbuffer jitterbuf.c
leave.h [code]
linkedlists.h [code]A set of macros to manage forward-linked lists
loader.c [code]Module Loader
localtime.c [code]
localtime.h [code]Custom localtime functions for multiple timezones
lock.h [code]Asterisk locking-related definitions:
  • ast_mutext_t, ast_rwlock_t and related functions;
  • atomic arithmetic instructions;
  • wrappers for channel locking
log2comp.h [code]Log2comp.h - various base 2 log computation versions
logger.c [code]Asterisk Logger
logger.h [code]Support for logging to various files, console and syslog Configuration in file logger.conf
lpc10_slin_ex.h [code]8-bit raw data
manager.c [code]The Asterisk Management Interface - AMI
manager.h [code]The AMI - Asterisk Manager Interface - is a TCP protocol created to manage Asterisk with third-party software
md5.c [code]MD5 checksum routines used for authentication. Not covered by GPL, but in the public domain as per the copyright below
md5.h [code]MD5 digest functions
misdn_config.c [code]Chan_misdn configuration management
mod_format.h [code]Header for providers of file and format handling routines. Clients of these routines should include "asterisk/file.h" instead
module.h [code]Asterisk module definitions
monitor.h [code]Channel monitoring
msgsm.h [code]
musiconhold.h [code]Music on hold handling
netsock.c [code]Network socket handling
netsock.h [code]Network socket handling
network.h [code]Wrapper for network related headers, masking differences between various operating systems. On passing, we also provide here trivial functions or other simple wrappers to network-related functions
options.h [code]Options provided by main asterisk program
paths.h [code]Asterisk file paths, configured in asterisk.conf
pbx.c [code]Core PBX routines
pbx.h [code]Core PBX routines and definitions
pbx_ael.c [code]Compile symbolic Asterisk Extension Logic into Asterisk extensions, version 2
pbx_config.c [code]Populate and remember extensions from static config file
pbx_dundi.c [code]Distributed Universal Number Discovery (DUNDi)
pbx_gtkconsole.c [code]GTK Console monitor -- very kludgy right now
pbx_loopback.c [code]Loopback PBX Module
pbx_lua.c [code]Lua PBX Switch
pbx_realtime.c [code]Realtime PBX Module
pbx_spool.c [code]Full-featured outgoing call spool support
plc.c [code]SpanDSP - a series of DSP components for telephony
plc.h [code]SpanDSP - a series of DSP components for telephony
poll-compat.h [code]
poll.c [code]
portinfo.c [code]Interface to mISDN - port info
privacy.c [code]Privacy Routines
privacy.h [code]Persistant data storage (akin to *doze registry)
private.h [code]
pval.h [code]
res_adsi.c [code]ADSI support
res_ael_share.c [code]Shareable AEL code -- mainly between internal and external modules
res_agi.c [code]AGI - the Asterisk Gateway Interface
res_clioriginate.c [code]Originate calls via the CLI
res_config_curl.c [code]Curl plugin for portable configuration engine
res_config_ldap.c [code]Ldap plugin for portable configuration engine (ARA)
res_config_odbc.c [code]Odbc+odbc plugin for portable configuration engine
res_config_pgsql.c [code]PostgreSQL plugin for Asterisk RealTime Architecture
res_config_sqlite.c [code]Res_config_sqlite module
res_convert.c [code]File format conversion CLI command using Asterisk formats and translators
res_crypto.c [code]Provide Cryptographic Signature capability
res_indications.c [code]Load the indications
res_jabber.c [code]A resource for interfacing Asterisk directly as a client or a component to a XMPP/Jabber compliant server
res_limit.c [code]Resource limits
res_monitor.c [code]PBX channel monitoring
res_musiconhold.c [code]Routines implementing music on hold
res_odbc.c [code]ODBC resource manager
res_odbc.h [code]ODBC resource manager
res_phoneprov.c [code]Phone provisioning application for the asterisk internal http server
res_realtime.c [code]RealTime CLI
res_smdi.c [code]SMDI support for Asterisk
res_snmp.c [code]SNMP Agent / SubAgent support for Asterisk
res_speech.c [code]Generic Speech Recognition API
rtp.c [code]Supports RTP and RTCP with Symmetric RTP support for NAT traversal
rtp.h [code]Supports RTP and RTCP with Symmetric RTP support for NAT traversal
say.c [code]Say numbers and dates (maybe words one day too)
say.h [code]Say numbers and dates (maybe words one day too)
sched.c [code]Scheduler Routines (from cheops-NG)
sched.h [code]Scheduler Routines (derived from cheops)
sha1.c [code]Based on the RFC 3174
sha1.h [code]
slin_adpcm_ex.h [code]Slin_adpcm_ex.h --
slin_g722_ex.h [code]Slin_g722_ex.h --
slin_g726_ex.h [code]Slin_adpcm_ex.h --
slin_gsm_ex.h [code]Signed 16-bit audio data
slin_ilbc_ex.h [code]Signed 16-bit audio data
slin_lpc10_ex.h [code]Signed 16-bit audio data
slin_resample_ex.h [code]Slin_resample_ex.h --
slin_speex_ex.h [code]Signed 16-bit audio data, 500ms of speech at 8kHz to ensure no DTX triggered
slin_ulaw_ex.h [code]Slin_ulaw_ex.h --
slinfactory.c [code]A machine to gather up arbitrary frames and convert them to raw slinear on demand
slinfactory.h [code]A machine to gather up arbitrary frames and convert them to raw slinear on demand
smdi.h [code]SMDI support for Asterisk
speech.h [code]Generic Speech Recognition API
speex_slin_ex.h [code]Random Data data
srv.c [code]DNS SRV Record Lookup Support for Asterisk
srv.h [code]Support for DNS SRV records, used in to locate SIP services
ssl.c [code]Common OpenSSL support code
strcompat.c [code]Compatibility functions for strsep and strtoq missing on Solaris
stringfields.h [code]String fields in structures
strings.h [code]String manipulation functions
tcptls.c [code]Code to support TCP and TLS server/client
tcptls.h [code]Generic support for tcp/tls servers in Asterisk
tdd.c [code]TTY/TDD Generation support
tdd.h [code]TTY/TDD Generation support
term.c [code]Terminal Routines
term.h [code]Handy terminal functions for vt* terms
test.c [code]Testing localtime functionality
threadstorage.c [code]Debugging support for thread-local-storage objects
threadstorage.h [code]Definitions to aid in the use of thread local storage
time.h [code]Time-related functions and macros
transcap.h [code]General Asterisk channel transcoding definitions
translate.c [code]Translate via the use of pseudo channels
translate.h [code]Support for translation of data formats. translate.c
tzfile.h [code]
udptl.c [code]UDPTL support for T.38 faxing
udptl.h [code]UDPTL support for T.38
ulaw.c [code]U-Law to Signed linear conversion
ulaw.h [code]U-Law to Signed linear conversion
ulaw_slin_ex.h [code]Ulaw_slin_ex.h --
unaligned.h [code]Handle unaligned data access
utils.c [code]Utility functions
utils.h [code]Utility functions
vcodecs.c [code]
vgrabbers.c [code]

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