Make chan_h323 respect packetization settings

Previously, packetization settings were ignored and now they are not. A new
config option 'autoframing' has been added to mirror the way chan_sip handles
it. Turning on the autoframing option (available both as a global option or per
peer) overrides the local settings with the remote packetization settings.
Testing was performed with varying packetization levels with the following
codecs: ulaw, alaw, gsm, and g729.

(closes issue #12415)
Reported by: pj
Patches:
      2009012200_h323packetization.diff.txt uploaded by mvanbaak (license 7),
      modified by me

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@189991 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/channels/chan_h323.c b/channels/chan_h323.c
index 695e3b406c6b82e9f71ea79e2e0a8029453d9673..6125822dcb9349596061b9919636ba133c72ee5c 100644 (file)
--- a/channels/chan_h323.c
+++ b/channels/chan_h323.c
@@ -1256,6 +1256,8 @@ static int update_common_options(struct ast_variable *v, struct call_options *op
 
        if (!strcasecmp(v->name, "allow")) {
                ast_parse_allow_disallow(&options->prefs, &options->capability, v->value, 1);
+       } else if (!strcasecmp(v->name, "autoframing")) {
+               options->autoframing = ast_true(v->value);
        } else if (!strcasecmp(v->name, "disallow")) {
                ast_parse_allow_disallow(&options->prefs, &options->capability, v->value, 0);
        } else if (!strcasecmp(v->name, "dtmfmode")) {
@@ -2409,8 +2411,15 @@ static void set_peer_capabilities(unsigned call_reference, const char *token, in
                                ast_log(LOG_DEBUG, "prefs[%d]=%s:%d\n", i, (prefs->order[i] ? ast_getformatname(1 << (prefs->order[i]-1)) : "<none>"), prefs->framing[i]);
                        }
                }
-               if (pvt->rtp)
-                       ast_rtp_codec_setpref(pvt->rtp, &pvt->peer_prefs);
+               if (pvt->rtp) {
+                       if (pvt->options.autoframing) {
+                               ast_log(LOG_DEBUG, "Autoframing option set, using peer's packetization settings\n");
+                               ast_rtp_codec_setpref(pvt->rtp, &pvt->peer_prefs);
+                       } else {
+                               ast_log(LOG_DEBUG, "Autoframing option not set, using ignoring peer's packetization settings\n");
+                               ast_rtp_codec_setpref(pvt->rtp, &pvt->options.prefs);
+                       }
+               }
        }
        ast_mutex_unlock(&pvt->lock);
 }
@@ -2434,8 +2443,15 @@ static void set_local_capabilities(unsigned call_reference, const char *token)
        ast_mutex_unlock(&pvt->lock);
        h323_set_capabilities(token, capability, dtmfmode, &prefs, pref_codec);
 
-       if (h323debug)
+       if (h323debug) {
+               int i;
+               for (i = 0; i < 32; i++) {
+                       if (!prefs.order[i])
+                               break;
+                       ast_log(LOG_DEBUG, "local prefs[%d]=%s:%d\n", i, (prefs.order[i] ? ast_getformatname(1 << (prefs.order[i]-1)) : "<none>"), prefs.framing[i]);
+               }
                ast_log(LOG_DEBUG, "Capabilities for connection %s is set\n", token);
+       }
 }
 
 static void *do_monitor(void *data)
@@ -2816,6 +2832,7 @@ static int reload_config(int is_reload)
        global_options.dtmfmode = H323_DTMF_RFC2833;
        global_options.capability = GLOBAL_CAPABILITY;
        global_options.bridge = 1;              /* Do native bridging by default */
+       global_options.autoframing = 0;
        strcpy(default_context, "default");
        h323_signalling_port = 1720;
        gatekeeper_disable = 1;

diff --git a/channels/h323/ast_h323.cxx b/channels/h323/ast_h323.cxx
index 7309f1549b9502f05a0f7f6b03bb7e4d12983969..6c8b39d55f0e63de6b38c0536036c30e1f9b1daf 100644 (file)
--- a/channels/h323/ast_h323.cxx
+++ b/channels/h323/ast_h323.cxx
@@ -1878,7 +1878,6 @@ void MyH323Connection::SetCapabilities(int cap, int dtmf_mode, void *_prefs, int
        struct ast_codec_pref *prefs = (struct ast_codec_pref *)_prefs;
        struct ast_format_list format;
        int frames_per_packet;
-       int max_frames_per_packet;
 
        localCapabilities.RemoveAll();
 
@@ -1904,9 +1903,9 @@ void MyH323Connection::SetCapabilities(int cap, int dtmf_mode, void *_prefs, int
                if (!(cap & codec) || (alreadysent & codec) || !(codec & AST_FORMAT_AUDIO_MASK))
                        continue;
                alreadysent |= codec;
+               /* format.cur_ms will be set to default if packetization is not explicitly set */
                format = ast_codec_pref_getsize(prefs, codec);
                frames_per_packet = (format.inc_ms ? format.cur_ms / format.inc_ms : format.cur_ms);
-               max_frames_per_packet = (format.inc_ms ? format.max_ms / format.inc_ms : 0);
                switch(codec) {
 #if 0
                case AST_FORMAT_SPEEX:
@@ -1926,37 +1925,30 @@ void MyH323Connection::SetCapabilities(int cap, int dtmf_mode, void *_prefs, int
                        AST_G729Capability *g729Cap;
                        lastcap = localCapabilities.SetCapability(0, 0, g729aCap = new AST_G729ACapability(frames_per_packet));
                        lastcap = localCapabilities.SetCapability(0, 0, g729Cap = new AST_G729Capability(frames_per_packet));
-                       if (max_frames_per_packet) {
-                               g729aCap->SetTxFramesInPacket(max_frames_per_packet);
-                               g729Cap->SetTxFramesInPacket(max_frames_per_packet);
-                       }
+                       g729aCap->SetTxFramesInPacket(format.cur_ms);
+                       g729Cap->SetTxFramesInPacket(format.cur_ms);
                        break;
                case AST_FORMAT_G723_1:
                        AST_G7231Capability *g7231Cap;
                        lastcap = localCapabilities.SetCapability(0, 0, g7231Cap = new AST_G7231Capability(frames_per_packet, TRUE));
-                       if (max_frames_per_packet)
-                               g7231Cap->SetTxFramesInPacket(max_frames_per_packet);
+                       g7231Cap->SetTxFramesInPacket(format.cur_ms);
                        lastcap = localCapabilities.SetCapability(0, 0, g7231Cap = new AST_G7231Capability(frames_per_packet, FALSE));
-                       if (max_frames_per_packet)
-                               g7231Cap->SetTxFramesInPacket(max_frames_per_packet);
+                       g7231Cap->SetTxFramesInPacket(format.cur_ms);
                        break;
                case AST_FORMAT_GSM:
                        AST_GSM0610Capability *gsmCap;
                        lastcap = localCapabilities.SetCapability(0, 0, gsmCap = new AST_GSM0610Capability(frames_per_packet));
-                       if (max_frames_per_packet)
-                               gsmCap->SetTxFramesInPacket(max_frames_per_packet);
+                       gsmCap->SetTxFramesInPacket(format.cur_ms);
                        break;
                case AST_FORMAT_ULAW:
                        AST_G711Capability *g711uCap;
                        lastcap = localCapabilities.SetCapability(0, 0, g711uCap = new AST_G711Capability(format.cur_ms, H323_G711Capability::muLaw));
-                       if (format.max_ms)
-                               g711uCap->SetTxFramesInPacket(format.max_ms);
+                       g711uCap->SetTxFramesInPacket(format.cur_ms);
                        break;
                case AST_FORMAT_ALAW:
                        AST_G711Capability *g711aCap;
                        lastcap = localCapabilities.SetCapability(0, 0, g711aCap = new AST_G711Capability(format.cur_ms, H323_G711Capability::ALaw));
-                       if (format.max_ms)
-                               g711aCap->SetTxFramesInPacket(format.max_ms);
+                       g711aCap->SetTxFramesInPacket(format.cur_ms);
                        break;
                default:
                        alreadysent &= ~codec;

diff --git a/channels/h323/chan_h323.h b/channels/h323/chan_h323.h
index f22e48b43482c5247d4c269030b4542589b901c6..fa715b904a2688c62151e2cf6177d8b2178d1545 100644 (file)
--- a/channels/h323/chan_h323.h
+++ b/channels/h323/chan_h323.h
@@ -64,6 +64,7 @@ typedef struct call_options {
        int                             bridge;
        int                             nat;
        int                             tunnelOptions;
+       int                             autoframing; /*!< turn on to override local settings with remote framing length */
        struct ast_codec_pref   prefs;
 } call_options_t;