Standardise clearing and copying frame with pjmedia_zero_samples() and pjmedia_copy_samples()

git-svn-id: http://svn.pjsip.org/repos/pjproject/trunk@506 74dad513-b988-da41-8d7b-12977e46ad98

1 files changed, 18 insertions, 2 deletions

diff --git a/pjmedia/include/pjmedia/types.h b/pjmedia/include/pjmedia/types.h
index f41edeb9..90f90b50 100644
--- a/pjmedia/include/pjmedia/types.h
+++ b/pjmedia/include/pjmedia/types.h
@@ -115,8 +115,9 @@ typedef struct pjmedia_sock_info
 
 /**
  * This is a general purpose function set PCM samples to zero.
- * Since this function is needed by many parts of the library, it is important
- * that the library should select the best performance for this.
+ * Since this function is needed by many parts of the library, 
+ * by putting this functionality in one place, it enables some.
+ * clever people to optimize this function.
  *
  * @param samples	The 16bit PCM samples.
  * @param count		Number of samples.
@@ -129,5 +130,20 @@ PJ_INLINE(void) pjmedia_zero_samples(pj_int16_t *samples, unsigned count)
 }
 
 
+/**
+ * This is a general purpose function to copy samples from/to buffers with
+ * equal size. Since this function is needed by many parts of the library, 
+ * by putting this functionality in one place, it enables some.
+ * clever people to optimize this function.
+ */
+PJ_INLINE(void) pjmedia_copy_samples(pj_int16_t *dst, const pj_int16_t *src,
+				     unsigned count)
+{
+    unsigned i;
+    for (i=0; i<count; ++i)
+	dst[i] = src[i];
+}
+
+
 #endif	/* __PJMEDIA_TYPES_H__ */