add some code optimizations, see the report for an explanation

(issue #7105, Mithraen)


git-svn-id: http://svn.digium.com/svn/asterisk/trunk@29018 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 4 insertions, 4 deletions

diff --git a/codecs/codec_a_mu.c b/codecs/codec_a_mu.c
index 6ab79be61..f1b35299a 100644
--- a/codecs/codec_a_mu.c
+++ b/codecs/codec_a_mu.c
@@ -55,12 +55,12 @@ static unsigned char a2mu[256];
 /*! \brief convert frame data and store into the buffer */
 static int alawtoulaw_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
 {
-	int i;
+	int x = f->samples;
 	int in_samples = f->samples;
 	unsigned char *src = f->data;
 	unsigned char *dst = (unsigned char *)pvt->outbuf + pvt->samples;
 
-	for (i = 0; i < in_samples; i++)
+	while (x--)
 		*dst++ = a2mu[*src++];
 	pvt->samples += in_samples;
 	pvt->datalen += in_samples;
@@ -70,12 +70,12 @@ static int alawtoulaw_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
 /*! \brief convert frame data and store into the buffer */
 static int ulawtoalaw_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
 {
-	int i;
+	int x = f->samples;
 	int in_samples = f->samples;
 	unsigned char *src = f->data;
 	unsigned char *dst = (unsigned char *)pvt->outbuf + pvt->samples;
 
-	for (i = 0; i < in_samples; i++)
+	while (x--)
 		*dst++ = mu2a[*src++];
 	pvt->samples += in_samples;
 	pvt->datalen += in_samples;