apps/app_playback.c: Add 'mix' option to app_playback

I am adding a mix option that will play by filename and say.conf unlike
say option that will only play with say.conf. It
will look on the format of the name, if it is like say it play with
say.conf if not it will play the file name.

ASTERISK-29662

Change-Id: I815816916a308f0fa8f165140dc15772dcbd547a

apps/app_playback.c

@@ -62,6 +62,12 @@
 						be answered before the sound is played.</para>
 						<note><para>Not all channel types support playing messages while still on hook.</para></note>
 					</option>
+					<option name="say">
+						<para>Play using the say.conf file.</para>
+					</option>
+					<option name="mix">
+						<para>Play using a mix of filename and the say.conf file.</para>
+					</option>
 				</optionlist>
 			</parameter>
 		</syntax>
@@ -446,6 +452,7 @@ static int playback_exec(struct ast_channel *chan, const char *data)
 	char *tmp;
 	int option_skip=0;
 	int option_say=0;
+	int option_mix=0;
 	int option_noanswer = 0;
 
 	AST_DECLARE_APP_ARGS(args,
@@ -466,6 +473,8 @@ static int playback_exec(struct ast_channel *chan, const char *data)
 			option_skip = 1;
 		if (strcasestr(args.options, "say"))
 			option_say = 1;
+		if (strcasestr(args.options, "mix"))
+			option_mix = 1;
 		if (strcasestr(args.options, "noanswer"))
 			option_noanswer = 1;
 	}
@@ -486,6 +495,13 @@ static int playback_exec(struct ast_channel *chan, const char *data)
 		while (!res && (front = strsep(&back, "&"))) {
 			if (option_say)
 				res = say_full(chan, front, "", ast_channel_language(chan), NULL, -1, -1);
+			else if (option_mix){
+				/* Check if it is in say format but not remote audio file */
+				if (strcasestr(front, ":") && !strcasestr(front, "://"))
+					res = say_full(chan, front, "", ast_channel_language(chan), NULL, -1, -1);
+				else
+					res = ast_streamfile(chan, front, ast_channel_language(chan));
+			}
 			else
 				res = ast_streamfile(chan, front, ast_channel_language(chan));
 			if (!res) {

doc/CHANGES-staging/add_mix_option_to_playback.txt

@@ -0,0 +1,7 @@
+Subject: app_playback
+Subject: apps
+
+A new option 'mix' is added to the Playback application that 
+will play by filename and say.conf. It will look on the format of the 
+name, if it is like say format it will play with say.conf if not it 
+will play the file name.