Ticket #680:

 - Fixed Symbian APS G.711 frame size variation issue.
 - Fixed APS implementation to regard 'samples_per_frame' setting.
 - Added APIs for u-law/a-law <-> PCM bulk conversions.




git-svn-id: http://svn.pjsip.org/repos/pjproject/trunk@2416 74dad513-b988-da41-8d7b-12977e46ad98

1 files changed, 68 insertions, 0 deletions

diff --git a/pjmedia/include/pjmedia/alaw_ulaw.h b/pjmedia/include/pjmedia/alaw_ulaw.h
index 7f7d80cf..3b97ad3d 100644
--- a/pjmedia/include/pjmedia/alaw_ulaw.h
+++ b/pjmedia/include/pjmedia/alaw_ulaw.h
@@ -139,6 +139,74 @@ PJ_DECL(unsigned char) pjmedia_ulaw2alaw(unsigned char uval);
 
 #endif
 
+/**
+ * Encode 16-bit linear PCM data to 8-bit U-Law data.
+ *
+ * @param dst	    Destination buffer for 8-bit U-Law data.
+ * @param src	    Source, 16-bit linear PCM data.
+ * @param len	    Number of samples.
+ */
+PJ_INLINE(void) pjmedia_ulaw_encode(pj_uint8_t *dst, const pj_int16_t *src, 
+				    pj_size_t len)
+{
+    const pj_int16_t *end = src + len;
+    
+    while (src < end) {
+	*dst++ = pjmedia_linear2ulaw(*src++);
+    }
+}
+
+/**
+ * Encode 16-bit linear PCM data to 8-bit A-Law data.
+ *
+ * @param dst	    Destination buffer for 8-bit A-Law data.
+ * @param src	    Source, 16-bit linear PCM data.
+ * @param len	    Number of samples.
+ */
+PJ_INLINE(void) pjmedia_alaw_encode(pj_uint8_t *dst, const pj_int16_t *src, 
+				    pj_size_t len)
+{
+    const pj_int16_t *end = src + len;
+    
+    while (src < end) {
+	*dst++ = pjmedia_linear2alaw(*src++);
+    }
+}
+
+/**
+ * Decode 8-bit U-Law data to 16-bit linear PCM data.
+ *
+ * @param dst	    Destination buffer for 16-bit PCM data.
+ * @param src	    Source, 8-bit U-Law data.
+ * @param len	    Number of samples.
+ */
+PJ_INLINE(void) pjmedia_ulaw_decode(pj_int16_t *dst, const pj_uint8_t *src, 
+				    pj_size_t len)
+{
+    const pj_uint8_t *end = src + len;
+    
+    while (src < end) {
+	*dst++ = pjmedia_ulaw2linear(*src++);
+    }
+}
+
+/**
+ * Decode 8-bit A-Law data to 16-bit linear PCM data.
+ *
+ * @param dst	    Destination buffer for 16-bit PCM data.
+ * @param src	    Source, 8-bit A-Law data.
+ * @param len	    Number of samples.
+ */
+PJ_INLINE(void) pjmedia_alaw_decode(pj_int16_t *dst, const pj_uint8_t *src, 
+				    pj_size_t len)
+{
+    const pj_uint8_t *end = src + len;
+    
+    while (src < end) {
+	*dst++ = pjmedia_alaw2linear(*src++);
+    }
+}
+
 PJ_END_DECL
 
 #endif	/* __PJMEDIA_ALAW_ULAW_H__ */