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Add G.726-32kbps Codec Transcoder (Tested with Cisco ATA-186)

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@2239 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Mark Spencer
2004-02-25 04:10:32 +00:00
parent 96abbad91d
commit ff976ce055
5 changed files with 1000 additions and 2 deletions
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22
rtp.c
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@@ -468,6 +468,7 @@ struct ast_frame *ast_rtp_read(struct ast_rtp *rtp)
rtp->f.samples = 240 * (rtp->f.datalen / 50);
break;
case AST_FORMAT_ADPCM:
case AST_FORMAT_G726:
rtp->f.samples = rtp->f.datalen * 2;
break;
case AST_FORMAT_G729A:
@@ -912,7 +913,13 @@ static int ast_rtp_raw_write(struct ast_rtp *rtp, struct ast_frame *f, int codec
case AST_FORMAT_ALAW:
/* If we're within +/- 20ms from when where we
predict we should be, use that */
pred = rtp->lastts + f->datalen;
pred = rtp->lastts + f->datalen * 2;
break;
case AST_FORMAT_ADPCM:
case AST_FORMAT_G726:
/* If we're within +/- 20ms from when where we
predict we should be, use that */
pred = rtp->lastts + f->datalen * 2;
break;
case AST_FORMAT_G729A:
pred = rtp->lastts + f->datalen * 8;
@@ -1025,6 +1032,19 @@ int ast_rtp_write(struct ast_rtp *rtp, struct ast_frame *_f)
}
ast_smoother_feed(rtp->smoother, _f);
while((f = ast_smoother_read(rtp->smoother)))
ast_rtp_raw_write(rtp, f, codec);
break;
case AST_FORMAT_G726:
if (!rtp->smoother) {
rtp->smoother = ast_smoother_new(80);
}
if (!rtp->smoother) {
ast_log(LOG_WARNING, "Unable to create smoother :(\n");
return -1;
}
ast_smoother_feed(rtp->smoother, _f);
while((f = ast_smoother_read(rtp->smoother)))
ast_rtp_raw_write(rtp, f, codec);
break;