Changeset 3641 for pjproject/branches/projects/2.0-dev/pjmedia/include/pjmedia/types.h

Timestamp:

Jul 14, 2011 6:34:29 AM (13 years ago)

Author:

bennylp

Message:

More re #1325 (pjmedia signature): invented pjmedia PJMEDIA_FOURCC macro, and change signature and pjmedia_format_id to use this object. Added pjmedia_fourcc_name( ) too

File:

• pjproject/branches/projects/2.0-dev/pjmedia/include/pjmedia/types.h (modified) (2 diffs)

pjproject/branches/projects/2.0-dev/pjmedia/include/pjmedia/types.h

@@ -192 +192 @@
 } pjmedia_rect;
 
+/**
+ * Macro for packing format from a four character code, similar to FOURCC.
+ */
+#define PJMEDIA_FOURCC(C1, C2, C3, C4) ( C4<<24 | C3<<16 | C2<<8 | C1 )
+
 
 /**
@@ -203 +208 @@
 
 /**
+ * A utility function to convert fourcc type of value to four letters string.
+ *
+ * @param sig           The fourcc value.
+ * @param buf           Buffer to store the string, which MUST be at least
+ *                      five bytes long.
+ *
+ * @return              The string.
+ */
+PJ_INLINE(const char*) pjmedia_fourcc_name(pj_uint32_t sig, char buf[])
+{
+    buf[3] = (char)((sig >> 24) & 0xFF);
+    buf[2] = (char)((sig >> 16) & 0xFF);
+    buf[1] = (char)((sig >>  8) & 0xFF);
+    buf[0] = (char)((sig >>  0) & 0xFF);
+    buf[4] = '\0';
+    return buf;
+}
+
+
+/**
  * @}
  */