TT#50652 add support for 8-bit unsigned PCM

Change-Id: I8a75c81ee90c2593a24367f86107863cfd5f680f

lib/codeclib.c

@@ -345,7 +345,7 @@ static codec_def_t __codec_defs[] = {
 		.default_clockrate = 8000,
 		.default_channels = 1,
 	},
-	// for file writing
+	// for file reading and writing
 	{
 		.rtpname = "PCM-S16LE",
 		.avcodec_id = AV_CODEC_ID_PCM_S16LE,
@@ -354,6 +354,14 @@ static codec_def_t __codec_defs[] = {
 		.media_type = MT_AUDIO,
 		.codec_type = &codec_type_avcodec,
 	},
+	{
+		.rtpname = "PCM-U8",
+		.avcodec_id = AV_CODEC_ID_PCM_U8,
+		.avcodec_name = NULL,
+		.packetizer = packetizer_passthrough,
+		.media_type = MT_AUDIO,
+		.codec_type = &codec_type_avcodec,
+	},
 	{
 		.rtpname = "MP3",
 		.avcodec_id = AV_CODEC_ID_MP3,