[svn-commits] sruffell: branch 1.8 r293970 - in /branches/1.8: ./ codecs/codec_dahdi.c

[SVN commits to the Digium repositories]

Author: sruffell
Date: Thu Nov  4 19:07:11 2010
New Revision: 293970

URL: http://svnview.digium.com/svn/asterisk?view=rev&rev=293970
Log:
Merged revisions 293969 via svnmerge from 
https://origsvn.digium.com/svn/asterisk/branches/1.6.2

................
  r293969 | sruffell | 2010-11-04 19:06:02 -0500 (Thu, 04 Nov 2010) | 25 lines
  
  Merged revisions 293968 via svnmerge from 
  https://origsvn.digium.com/svn/asterisk/branches/1.4
  
  ........
    r293968 | sruffell | 2010-11-04 19:02:53 -0500 (Thu, 04 Nov 2010) | 17 lines
    
    codecs/codec_dahdi: Prevent "choppy" audio when receiving unexpected frame sizes.
    
    dahdi-linux 2.4.0 (specifically commit 9034) added the capability for
    the wctc4xxp to return more than a single packet of data in response to
    a read.  However, when decoding packets, codec_dahdi was still assuming
    that the default number of samples was in each read.
    
    In other words, each packet your provider sent you, regardless of size,
    would result in 20 ms of decoded data (30 ms if decoding G723). If your
    provider was sending 60 ms packets then codec_dahdi would end up
    stripping 40 ms of data from each transcoded frame resulting in "choppy"
    audio.
    
    This would only affect systems where G729 packets are arriving in sizes
    greater than 20ms or G723 packets arriving in sizes greater than 30ms.
    
    DAHDI-744.
  ........
................

Modified:
    branches/1.8/   (props changed)
    branches/1.8/codecs/codec_dahdi.c

Propchange: branches/1.8/
------------------------------------------------------------------------------
Binary property 'branch-1.6.2-merged' - no diff available.

Modified: branches/1.8/codecs/codec_dahdi.c
URL: http://svnview.digium.com/svn/asterisk/branches/1.8/codecs/codec_dahdi.c?view=diff&rev=293970&r1=293969&r2=293970
==============================================================================
--- branches/1.8/codecs/codec_dahdi.c (original)
+++ branches/1.8/codecs/codec_dahdi.c Thu Nov  4 19:07:11 2010
@@ -92,10 +92,10 @@
 };
 
 /* Only used by a decoder */
-static int ulawtolin(struct ast_trans_pvt *pvt)
-{
-	struct codec_dahdi_pvt *dahdip = pvt->pvt;
-	int i = dahdip->required_samples;
+static int ulawtolin(struct ast_trans_pvt *pvt, int samples)
+{
+	struct codec_dahdi_pvt *dahdip = pvt->pvt;
+	int i = samples;
 	uint8_t *src = &dahdip->ulaw_buffer[0];
 	int16_t *dst = pvt->outbuf.i16 + pvt->datalen;
 
@@ -331,7 +331,7 @@
 		}
 	} else {
 		if (dahdip->softslin) {
-			ulawtolin(pvt);
+			ulawtolin(pvt, res);
 			pvt->f.datalen = res * 2;
 		} else {
 			pvt->f.datalen = res;
@@ -343,7 +343,7 @@
 		pvt->f.offset = AST_FRIENDLY_OFFSET;
 		pvt->f.src = pvt->t->name;
 		pvt->f.data.ptr = pvt->outbuf.c;
-		pvt->f.samples = dahdip->required_samples;
+		pvt->f.samples = res;
 		pvt->samples = 0;
 
 		return ast_frisolate(&pvt->f);