1 files changed, 18 insertions, 0 deletions
diff --git a/src/audio/g711.h b/src/audio/g711.h
new file mode 100644
index 0000000..ed2f007
--- /dev/null
+++ b/src/audio/g711.h
@@ -0,0 +1,18 @@
+#ifndef _G711_H
+#define _G711_H
+
+// The linear PCM codes are signed 16 bit values
+
+// G.711 A-law
+unsigned char linear2alaw(short pcm_val);
+short alaw2linear(unsigned char a_val);
+
+// G.711 u-law
+unsigned char linear2ulaw(short pcm_val);
+short ulaw2linear(unsigned char u_val);
+
+// A-law <-> u-law conversions
+unsigned char alaw2ulaw(unsigned char aval);
+unsigned char ulaw2alaw(unsigned char uval);
+
+#endif