[asterisk-dev] Re: [svn-commits] trunk r31413 - in /trunk:
channels/ channels/h323/ configs/
Slav Klenov
slav at securax.org
Thu Jun 1 10:21:45 MST 2006
svn-commits at lists.digium.com wrote:
>Author: russell
>Date: Thu Jun 1 11:47:28 2006
>New Revision: 31413
>
>URL: http://svn.digium.com/view/asterisk?rev=31413&view=rev
>Log:
>- add the ability to configure forced jitterbuffers on h323, jingle,
> and mgcp channels
>- remove the jitterbuffer configuration from the pvt structures in
> the sip, zap, and skinny channel drivers, as copying the same global
> configuration into each pvt structure has no benefit.
>
>
The jitterbuffer configuration was put in the pvt structures with the
idea to implement per peer/user configuration at some future point. I'm
not sure if this can be done without having the configuration in the
pvt, which is in some sense a configuration bridge between the user/peer
structures and the abstract channel - I mean when you create the
channel, you don't have a reference to the user/peer struct already, and
analogously, when you read configuration and build the user/peer
structures, a channel is yet not created.
Slav
>- update and fix some typos in jitterbuffer related documentation
>(issue #7257, north, with additional updates and modifications)
>
>Modified:
> trunk/channels/chan_h323.c
> trunk/channels/chan_jingle.c
> trunk/channels/chan_mgcp.c
> trunk/channels/chan_oss.c
> trunk/channels/chan_sip.c
> trunk/channels/chan_skinny.c
> trunk/channels/chan_zap.c
> trunk/channels/h323/h323.conf.sample
> trunk/configs/alsa.conf.sample
> trunk/configs/mgcp.conf.sample
> trunk/configs/oss.conf.sample
> trunk/configs/sip.conf.sample
> trunk/configs/skinny.conf.sample
> trunk/configs/zapata.conf.sample
>
>Modified: trunk/channels/chan_h323.c
>URL: http://svn.digium.com/view/asterisk/trunk/channels/chan_h323.c?rev=31413&r1=31412&r2=31413&view=diff
>==============================================================================
>--- trunk/channels/chan_h323.c (original)
>+++ trunk/channels/chan_h323.c Thu Jun 1 11:47:28 2006
>@@ -83,6 +83,7 @@
> #include "asterisk/dsp.h"
> #include "asterisk/causes.h"
> #include "asterisk/stringfields.h"
>+#include "asterisk/abstract_jb.h"
> #ifdef __cplusplus
> }
> #endif
>@@ -104,6 +105,16 @@
>
> /* global debug flag */
> int h323debug;
>+
>+/*! Global jitterbuffer configuration - by default, jb is disabled */
>+static struct ast_jb_conf default_jbconf =
>+{
>+ .flags = 0,
>+ .max_size = -1,
>+ .resync_threshold = -1,
>+ .impl = ""
>+};
>+static struct ast_jb_conf global_jbconf;
>
> /** Variables required by Asterisk */
> static const char desc[] = "The NuFone Network's Open H.323 Channel Driver";
>@@ -788,6 +799,10 @@
> ch = NULL;
> }
> }
>+
>+ /* Configure the new channel jb */
>+ if (ch && pvt && pvt->rtp)
>+ ast_jb_configure(ch, &global_jbconf);
> } else {
> ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
> }
>@@ -2020,8 +2035,18 @@
> global_options.dtmfmode = H323_DTMF_RFC2833;
> global_options.capability = GLOBAL_CAPABILITY;
> global_options.bridge = 1; /* Do native bridging by default */
>+
>+ /* Copy the default jb config over global_jbconf */
>+ memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));
>+
> v = ast_variable_browse(cfg, "general");
>- while(v) {
>+ while (v) {
>+ /* handle jb conf */
>+ if (!ast_jb_read_conf(&global_jbconf, v->name, v->value)) {
>+ v = v->next;
>+ continue;
>+ }
>+
> /* Create the interface list */
> if (!strcasecmp(v->name, "port")) {
> h323_signalling_port = (int)strtol(v->value, NULL, 10);
>
>Modified: trunk/channels/chan_jingle.c
>URL: http://svn.digium.com/view/asterisk/trunk/channels/chan_jingle.c?rev=31413&r1=31412&r2=31413&view=diff
>==============================================================================
>--- trunk/channels/chan_jingle.c (original)
>+++ trunk/channels/chan_jingle.c Thu Jun 1 11:47:28 2006
>@@ -69,10 +69,21 @@
> #include "asterisk/utils.h"
> #include "asterisk/causes.h"
> #include "asterisk/astobj.h"
>+#include "asterisk/abstract_jb.h"
> #include "asterisk/jabber.h"
> #include "asterisk/jingle.h"
>
> #define JINGLE_CONFIG "jingle.conf"
>+
>+/*! Global jitterbuffer configuration - by default, jb is disabled */
>+static struct ast_jb_conf default_jbconf =
>+{
>+ .flags = 0,
>+ .max_size = -1,
>+ .resync_threshold = -1,
>+ .impl = ""
>+};
>+static struct ast_jb_conf global_jbconf;
>
> enum jingle_protocol {
> AJI_PROTOCOL_UDP = 1,
>@@ -773,6 +784,11 @@
> ast_hangup(tmp);
> tmp = NULL;
> }
>+
>+ /* Configure the new channel jb */
>+ if (tmp && i && i->rtp)
>+ ast_jb_configure(tmp, &global_jbconf);
>+
> return tmp;
> }
>
>@@ -1453,8 +1469,15 @@
> return 0;
> }
>
>+ /* Copy the default jb config over global_jbconf */
>+ memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));
>+
> cat = ast_category_browse(cfg, NULL);
> for (var = ast_variable_browse(cfg, "general"); var; var = var->next) {
>+ /* handle jb conf */
>+ if (!ast_jb_read_conf(&global_jbconf, var->name, var->value))
>+ continue;
>+
> if (!strcasecmp(var->name, "allowguest"))
> allowguest =
> (ast_true(ast_variable_retrieve(cfg, "general", "allowguest"))) ? 1 : 0;
>
>Modified: trunk/channels/chan_mgcp.c
>URL: http://svn.digium.com/view/asterisk/trunk/channels/chan_mgcp.c?rev=31413&r1=31412&r2=31413&view=diff
>==============================================================================
>--- trunk/channels/chan_mgcp.c (original)
>+++ trunk/channels/chan_mgcp.c Thu Jun 1 11:47:28 2006
>@@ -117,6 +117,7 @@
> #include "asterisk/dsp.h"
> #include "asterisk/devicestate.h"
> #include "asterisk/stringfields.h"
>+#include "asterisk/abstract_jb.h"
>
> #ifndef IPTOS_MINCOST
> #define IPTOS_MINCOST 0x02
>@@ -136,6 +137,16 @@
> #ifndef INADDR_NONE
> #define INADDR_NONE (in_addr_t)(-1)
> #endif
>+
>+/*! Global jitterbuffer configuration - by default, jb is disabled */
>+static struct ast_jb_conf default_jbconf =
>+{
>+ .flags = 0,
>+ .max_size = -1,
>+ .resync_threshold = -1,
>+ .impl = ""
>+};
>+static struct ast_jb_conf global_jbconf;
>
> static const char tdesc[] = "Media Gateway Control Protocol (MGCP)";
> static const char config[] = "mgcp.conf";
>@@ -353,10 +364,6 @@
> This should be obsoleted */
> char cxident[80];
> char callid[80];
>-/* SC: obsolete
>- time_t lastouttime;
>- int lastout;
>-*/
> int cxmode;
> struct mgcp_request *cx_queue; /*!< SC: pending CX commands */
> ast_mutex_t cx_queue_lock; /*!< SC: CX queue lock */
>@@ -364,10 +371,6 @@
> int iseq; /* Not used? RTP? */
> int outgoing;
> int alreadygone;
>-/* SC: obsolete
>- int messagepending;
>- struct mgcp_message *msgs;
>-*/
> struct mgcp_subchannel *next; /* for out circular linked list */
> };
>
>@@ -1499,6 +1502,10 @@
> ast_verbose(VERBOSE_PREFIX_3 "MGCP mgcp_new(%s) created in state: %s\n",
> tmp->name, ast_state2str(state));
> }
>+
>+ /* Configure the new channel jb */
>+ if (tmp && sub && sub->rtp)
>+ ast_jb_configure(tmp, &global_jbconf);
> } else {
> ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
> }
>@@ -4165,8 +4172,18 @@
> }
> memset(&bindaddr, 0, sizeof(bindaddr));
> dtmfmode = 0;
>+
>+ /* Copy the default jb config over global_jbconf */
>+ memcpy(&global_jbconf, &default_jbconf, sizeof(struct ast_jb_conf));
>+
> v = ast_variable_browse(cfg, "general");
>- while(v) {
>+ while (v) {
>+ /* handle jb conf */
>+ if (!ast_jb_read_conf(&global_jbconf, v->name, v->value)) {
>+ v = v->next;
>+ continue;
>+ }
>+
> /* Create the interface list */
> if (!strcasecmp(v->name, "bindaddr")) {
> if (!(hp = ast_gethostbyname(v->value, &ahp))) {
>
>Modified: trunk/channels/chan_oss.c
>URL: http://svn.digium.com/view/asterisk/trunk/channels/chan_oss.c?rev=31413&r1=31412&r2=31413&view=diff
>==============================================================================
>--- trunk/channels/chan_oss.c (original)
>+++ trunk/channels/chan_oss.c Thu Jun 1 11:47:28 2006
>@@ -156,13 +156,9 @@
> ; jbenable = yes ; Enables the use of a jitterbuffer on the receiving side of an
> ; OSS channel. Defaults to "no". An enabled jitterbuffer will
> ; be used only if the sending side can create and the receiving
>- ; side can not accept jitter. The ZAP channel can't accept jitter,
>- ; thus an enabled jitterbuffer on the receive ZAP side will always
>- ; be used if the sending side can create jitter or if ZAP jb is
>- ; forced.
>-
>- ; jbforce = no ; Forces the use of a jitterbuffer on the receive side of a ZAP
>- ; channel. Defaults to "no".
>+ ; side can not accept jitter. The OSS channel can't accept jitter,
>+ ; thus an enabled jitterbuffer on the receive OSS side will always
>+ ; be used if the sending side can create jitter.
>
> ; jbmaxsize = 200 ; Max length of the jitterbuffer in milliseconds.
>
>@@ -171,8 +167,8 @@
> ; big jumps in/broken timestamps, usualy sent from exotic devices
> ; and programs. Defaults to 1000.
>
>- ; jbimpl = fixed ; Jitterbuffer implementation, used on the receiving side of a SIP
>- ; channel. Two implementation are currenlty available - "fixed"
>+ ; jbimpl = fixed ; Jitterbuffer implementation, used on the receiving side of an OSS
>+ ; channel. Two implementations are currenlty available - "fixed"
> ; (with size always equals to jbmax-size) and "adaptive" (with
> ; variable size, actually the new jb of IAX2). Defaults to fixed.
>
>
>Modified: trunk/channels/chan_sip.c
>URL: http://svn.digium.com/view/asterisk/trunk/channels/chan_sip.c?rev=31413&r1=31412&r2=31413&view=diff
>==============================================================================
>--- trunk/channels/chan_sip.c (original)
>+++ trunk/channels/chan_sip.c Thu Jun 1 11:47:28 2006
>@@ -857,7 +857,6 @@
> struct ast_variable *chanvars; /*!< Channel variables to set for inbound call */
> struct sip_pvt *next; /*!< Next dialog in chain */
> struct sip_invite_param *options; /*!< Options for INVITE */
>- struct ast_jb_conf jbconf;
> } *iflist = NULL;
>
> #define FLAG_RESPONSE (1 << 0)
>@@ -3357,7 +3356,7 @@
>
> /* Configure the new channel jb */
> if (tmp && i && i->rtp)
>- ast_jb_configure(tmp, &i->jbconf);
>+ ast_jb_configure(tmp, &global_jbconf);
>
> return tmp;
> }
>@@ -3692,9 +3691,6 @@
> (ast_test_flag(&p->flags[0], SIP_DTMF) == SIP_DTMF_AUTO))
> p->noncodeccapability |= AST_RTP_DTMF;
> ast_string_field_set(p, context, default_context);
>-
>- /* Assign default jb conf to the new sip_pvt */
>- memcpy(&p->jbconf, &global_jbconf, sizeof(struct ast_jb_conf));
>
> /* Add to active dialog list */
> ast_mutex_lock(&iflock);
>
>Modified: trunk/channels/chan_skinny.c
>URL: http://svn.digium.com/view/asterisk/trunk/channels/chan_skinny.c?rev=31413&r1=31412&r2=31413&view=diff
>==============================================================================
>--- trunk/channels/chan_skinny.c (original)
>+++ trunk/channels/chan_skinny.c Thu Jun 1 11:47:28 2006
>@@ -826,8 +826,6 @@
> int nat;
> int outgoing;
> int alreadygone;
>- struct ast_jb_conf jbconf;
>-
> struct skinny_subchannel *next;
> };
>
>@@ -1615,10 +1613,6 @@
> callnums++;
> sub->cxmode = SKINNY_CX_INACTIVE;
> sub->nat = nat;
>-
>- /* Assign default jb conf to the new skinny_subchannel */
>- memcpy(&sub->jbconf, &global_jbconf, sizeof(struct ast_jb_conf));
>-
> sub->next = l->sub;
> l->sub = sub;
> } else {
>@@ -2311,7 +2305,7 @@
>
> /* Configure the new channel jb */
> if (tmp && sub && sub->rtp)
>- ast_jb_configure(tmp, &sub->jbconf);
>+ ast_jb_configure(tmp, &global_jbconf);
> } else {
> ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
> }
>@@ -3121,7 +3115,7 @@
>
> /* load the general section */
> v = ast_variable_browse(cfg, "general");
>- while(v) {
>+ while (v) {
> /* handle jb conf */
> if (!ast_jb_read_conf(&global_jbconf, v->name, v->value)) {
> v = v->next;
>
>Modified: trunk/channels/chan_zap.c
>URL: http://svn.digium.com/view/asterisk/trunk/channels/chan_zap.c?rev=31413&r1=31412&r2=31413&view=diff
>==============================================================================
>--- trunk/channels/chan_zap.c (original)
>+++ trunk/channels/chan_zap.c Thu Jun 1 11:47:28 2006
>@@ -698,8 +698,6 @@
> #endif
> int polarity;
> int dsp_features;
>- struct ast_jb_conf jbconf;
>-
> } *iflist = NULL, *ifend = NULL;
>
> static struct ast_channel *zt_request(const char *type, int format, void *data, int *cause);
>@@ -5215,7 +5213,7 @@
> ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
> /* Configure the new channel jb */
> if (tmp && i)
>- ast_jb_configure(tmp, &i->jbconf);
>+ ast_jb_configure(tmp, &global_jbconf);
> return tmp;
> }
>
>@@ -7011,8 +7009,6 @@
> for (x = 0; x < 3; x++)
> tmp->subs[x].zfd = -1;
> tmp->channel = channel;
>- /* Assign default jb conf to the new zt_pvt */
>- memcpy(&tmp->jbconf, &global_jbconf, sizeof(struct ast_jb_conf));
> }
>
> if (tmp) {
>
>Modified: trunk/channels/h323/h323.conf.sample
>URL: http://svn.digium.com/view/asterisk/trunk/channels/h323/h323.conf.sample?rev=31413&r1=31412&r2=31413&view=diff
>==============================================================================
>--- trunk/channels/h323/h323.conf.sample (original)
>+++ trunk/channels/h323/h323.conf.sample Thu Jun 1 11:47:28 2006
>@@ -63,6 +63,32 @@
> ; use user authentication at all.
> ;
> ;context=default
>+;------------------------------ JITTER BUFFER CONFIGURATION --------------------------
>+; jbenable = yes ; Enables the use of a jitterbuffer on the receiving side of a
>+ ; H323 channel. Defaults to "no". An enabled jitterbuffer will
>+ ; be used only if the sending side can create and the receiving
>+ ; side can not accept jitter. The H323 channel can accept jitter,
>+ ; thus an enabled jitterbuffer on the receive H323 side will only
>+ ; be used if the sending side can create jitter and jbforce is
>+ ; also set to yes.
>+
>+; jbforce = no ; Forces the use of a jitterbuffer on the receive side of a H323
>+ ; channel. Defaults to "no".
>+
>+; jbmaxsize = 200 ; Max length of the jitterbuffer in milliseconds.
>+
>+; jbresyncthreshold = 1000 ; Jump in the frame timestamps over which the jitterbuffer is
>+ ; resynchronized. Useful to improve the quality of the voice, with
>+ ; big jumps in/broken timestamps, usualy sent from exotic devices
>+ ; and programs. Defaults to 1000.
>+
>+; jbimpl = fixed ; Jitterbuffer implementation, used on the receiving side of a H323
>+ ; channel. Two implementations are currenlty available - "fixed"
>+ ; (with size always equals to jbmax-size) and "adaptive" (with
>+ ; variable size, actually the new jb of IAX2). Defaults to fixed.
>+
>+; jblog = no ; Enables jitterbuffer frame logging. Defaults to "no".
>+;-----------------------------------------------------------------------------------
> ;
> ; H.323 Alias definitions
> ;
>
>Modified: trunk/configs/alsa.conf.sample
>URL: http://svn.digium.com/view/asterisk/trunk/configs/alsa.conf.sample?rev=31413&r1=31412&r2=31413&view=diff
>==============================================================================
>--- trunk/configs/alsa.conf.sample (original)
>+++ trunk/configs/alsa.conf.sample Thu Jun 1 11:47:28 2006
>@@ -34,13 +34,9 @@
> ; jbenable = yes ; Enables the use of a jitterbuffer on the receiving side of an
> ; ALSA channel. Defaults to "no". An enabled jitterbuffer will
> ; be used only if the sending side can create and the receiving
>- ; side can not accept jitter. The ZAP channel can't accept jitter,
>- ; thus an enabled jitterbuffer on the receive ZAP side will always
>- ; be used if the sending side can create jitter or if ZAP jb is
>- ; forced.
>-
>-; jbforce = no ; Forces the use of a jitterbuffer on the receive side of a ZAP
>- ; channel. Defaults to "no".
>+ ; side can not accept jitter. The ALSA channel can't accept jitter,
>+ ; thus an enabled jitterbuffer on the receive ALSA side will always
>+ ; be used if the sending side can create jitter.
>
> ; jbmaxsize = 200 ; Max length of the jitterbuffer in milliseconds.
>
>
>Modified: trunk/configs/mgcp.conf.sample
>URL: http://svn.digium.com/view/asterisk/trunk/configs/mgcp.conf.sample?rev=31413&r1=31412&r2=31413&view=diff
>==============================================================================
>--- trunk/configs/mgcp.conf.sample (original)
>+++ trunk/configs/mgcp.conf.sample Thu Jun 1 11:47:28 2006
>@@ -4,6 +4,33 @@
> [general]
> ;port = 2427
> ;bindaddr = 0.0.0.0
>+
>+;------------------------------ JITTER BUFFER CONFIGURATION --------------------------
>+; jbenable = yes ; Enables the use of a jitterbuffer on the receiving side of a
>+ ; MGCP channel. Defaults to "no". An enabled jitterbuffer will
>+ ; be used only if the sending side can create and the receiving
>+ ; side can not accept jitter. The MGCP channel can accept jitter,
>+ ; thus an enabled jitterbuffer on the receive MGCP side will only
>+ ; be used if the sending side can create jitter and jbforce is
>+ ; also set to yes.
>+
>+; jbforce = no ; Forces the use of a jitterbuffer on the receive side of a MGCP
>+ ; channel. Defaults to "no".
>+
>+; jbmaxsize = 200 ; Max length of the jitterbuffer in milliseconds.
>+
>+; jbresyncthreshold = 1000 ; Jump in the frame timestamps over which the jitterbuffer is
>+ ; resynchronized. Useful to improve the quality of the voice, with
>+ ; big jumps in/broken timestamps, usualy sent from exotic devices
>+ ; and programs. Defaults to 1000.
>+
>+; jbimpl = fixed ; Jitterbuffer implementation, used on the receiving side of a MGCP
>+ ; channel. Two implementations are currenlty available - "fixed"
>+ ; (with size always equals to jbmax-size) and "adaptive" (with
>+ ; variable size, actually the new jb of IAX2). Defaults to fixed.
>+
>+; jblog = no ; Enables jitterbuffer frame logging. Defaults to "no".
>+;-----------------------------------------------------------------------------------
>
> ;[dlinkgw]
> ;host = 192.168.0.64
>
>Modified: trunk/configs/oss.conf.sample
>URL: http://svn.digium.com/view/asterisk/trunk/configs/oss.conf.sample?rev=31413&r1=31412&r2=31413&view=diff
>==============================================================================
>--- trunk/configs/oss.conf.sample (original)
>+++ trunk/configs/oss.conf.sample Thu Jun 1 11:47:28 2006
>@@ -50,13 +50,9 @@
> ; jbenable = yes ; Enables the use of a jitterbuffer on the receiving side of an
> ; OSS channel. Defaults to "no". An enabled jitterbuffer will
> ; be used only if the sending side can create and the receiving
>- ; side can not accept jitter. The ZAP channel can't accept jitter,
>- ; thus an enabled jitterbuffer on the receive ZAP side will always
>- ; be used if the sending side can create jitter or if ZAP jb is
>- ; forced.
>-
>- ; jbforce = no ; Forces the use of a jitterbuffer on the receive side of a ZAP
>- ; channel. Defaults to "no".
>+ ; side can not accept jitter. The OSS channel can't accept jitter,
>+ ; thus an enabled jitterbuffer on the receive OSS side will always
>+ ; be used if the sending side can create jitter.
>
> ; jbmaxsize = 200 ; Max length of the jitterbuffer in milliseconds.
>
>@@ -65,8 +61,8 @@
> ; big jumps in/broken timestamps, usualy sent from exotic devices
> ; and programs. Defaults to 1000.
>
>- ; jbimpl = fixed ; Jitterbuffer implementation, used on the receiving side of a SIP
>- ; channel. Two implementation are currenlty available - "fixed"
>+ ; jbimpl = fixed ; Jitterbuffer implementation, used on the receiving side of an OSS
>+ ; channel. Two implementations are currenlty available - "fixed"
> ; (with size always equals to jbmax-size) and "adaptive" (with
> ; variable size, actually the new jb of IAX2). Defaults to fixed.
>
>
>Modified: trunk/configs/sip.conf.sample
>URL: http://svn.digium.com/view/asterisk/trunk/configs/sip.conf.sample?rev=31413&r1=31412&r2=31413&view=diff
>==============================================================================
>--- trunk/configs/sip.conf.sample (original)
>+++ trunk/configs/sip.conf.sample Thu Jun 1 11:47:28 2006
>@@ -321,7 +321,7 @@
> ; and programs. Defaults to 1000.
>
> ; jbimpl = fixed ; Jitterbuffer implementation, used on the receiving side of a SIP
>- ; channel. Two implementation are currenlty available - "fixed"
>+ ; channel. Two implementations are currenlty available - "fixed"
> ; (with size always equals to jbmaxsize) and "adaptive" (with
> ; variable size, actually the new jb of IAX2). Defaults to fixed.
>
>
>Modified: trunk/configs/skinny.conf.sample
>URL: http://svn.digium.com/view/asterisk/trunk/configs/skinny.conf.sample?rev=31413&r1=31412&r2=31413&view=diff
>==============================================================================
>--- trunk/configs/skinny.conf.sample (original)
>+++ trunk/configs/skinny.conf.sample Thu Jun 1 11:47:28 2006
>@@ -29,7 +29,7 @@
> ; and programs. Defaults to 1000.
>
> ;jbimpl = fixed ; Jitterbuffer implementation, used on the receiving side of a
>- ; skinny channel. Two implementation are currently available
>+ ; skinny channel. Two implementations are currently available
> ; - "fixed" (with size always equals to jbmaxsize)
> ; - "adaptive" (with variable size, actually the new jb of IAX2).
> ; Defaults to fixed.
>
>Modified: trunk/configs/zapata.conf.sample
>URL: http://svn.digium.com/view/asterisk/trunk/configs/zapata.conf.sample?rev=31413&r1=31412&r2=31413&view=diff
>==============================================================================
>--- trunk/configs/zapata.conf.sample (original)
>+++ trunk/configs/zapata.conf.sample Thu Jun 1 11:47:28 2006
>@@ -501,11 +501,7 @@
> ; be used only if the sending side can create and the receiving
> ; side can not accept jitter. The ZAP channel can't accept jitter,
> ; thus an enabled jitterbuffer on the receive ZAP side will always
>- ; be used if the sending side can create jitter or if ZAP jb is
>- ; forced.
>-
>-; jbforce = no ; Forces the use of a jitterbuffer on the receive side of a ZAP
>- ; channel. Defaults to "no".
>+ ; be used if the sending side can create jitter.
>
> ; jbmaxsize = 200 ; Max length of the jitterbuffer in milliseconds.
>
>@@ -514,8 +510,8 @@
> ; big jumps in/broken timestamps, usualy sent from exotic devices
> ; and programs. Defaults to 1000.
>
>-; jbimpl = fixed ; Jitterbuffer implementation, used on the receiving side of a SIP
>- ; channel. Two implementation are currenlty available - "fixed"
>+; jbimpl = fixed ; Jitterbuffer implementation, used on the receiving side of a ZAP
>+ ; channel. Two implementations are currenlty available - "fixed"
> ; (with size always equals to jbmax-size) and "adaptive" (with
> ; variable size, actually the new jb of IAX2). Defaults to fixed.
>
>
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