MT#61630 stop media NG: move essential body to a function

Move part of the `call_stop_media_ng` function body
to a separate function, to let it be available
for external function calls not particularly related
to play media NG function call.

Change-Id: I278f7bc5a6663e9232e812d10f6902616c67c497

daemon/call_interfaces.c

@@ -3635,11 +3635,7 @@ const char *call_stop_media_ng(ng_command_ctx_t *ctx) {
 		if (!monologue->player)
 			return "Not currently playing media";
 
-		last_frame_pos = media_player_stop(monologue->player);
-
-		// restore to non-mixing if needed
-		codec_update_all_source_handlers(monologue, NULL);
-		update_init_subscribers(monologue, OP_STOP_MEDIA);
+		last_frame_pos = call_stop_media_for_ml(monologue);
 	}
 	parser->dict_add_int(ctx->resp, "last-frame-pos", last_frame_pos);
 

daemon/media_player.c

@@ -1221,6 +1221,19 @@ const char * call_play_media_for_ml(struct call_monologue *ml,
 #endif
 }
 
+long long call_stop_media_for_ml(struct call_monologue *ml)
+{
+#ifdef WITH_TRANSCODING
+	long long ret = media_player_stop(ml->player);
+	/* restore to non-mixing if needed */
+	codec_update_all_source_handlers(ml, NULL);
+	update_init_subscribers(ml, OP_STOP_MEDIA);
+	return ret;
+#else
+	return 0;
+#endif
+}
+
 #ifdef WITH_TRANSCODING
 static int __mp_avio_read_wrap(void *opaque, uint8_t *buf, int buf_size) {
 	struct media_player_coder *c = opaque;

include/media_player.h

@@ -134,6 +134,7 @@ void media_player_add_packet(struct media_player *mp, char *buf, size_t len,
 
 const char * call_play_media_for_ml(struct call_monologue *ml,
 		media_player_opts_t opts, sdp_ng_flags *flags);
+long long call_stop_media_for_ml(struct call_monologue *ml);
 
 void media_player_init(void);
 void media_player_free(void);