Changeset 2416 for pjproject/trunk/pjmedia/include/pjmedia/alaw_ulaw.h

Timestamp:

Jan 5, 2009 3:27:02 PM (15 years ago)

Author:

nanang

Message:

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.

File:

• pjproject/trunk/pjmedia/include/pjmedia/alaw_ulaw.h (modified) (1 diff)

pjproject/trunk/pjmedia/include/pjmedia/alaw_ulaw.h

@@ -140 +140 @@
 #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