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

Move part of the `call_play_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: Iaf4e8f72f1492446508fd6b49ba36434cae5f5f0

daemon/call_interfaces.c

@@ -3590,15 +3590,6 @@ const char *call_play_media_ng(ng_command_ctx_t *ctx) {
 	for (__auto_type l = monologues.head; l; l = l->next) {
 		struct call_monologue *monologue = l->data;
 
-		// if mixing is enabled, codec handlers of all sources must be updated
-		codec_update_all_source_handlers(monologue, &flags);
-		// this starts the audio player if needed
-		update_init_subscribers(monologue, OP_PLAY_MEDIA);
-		// media_player_new() now knows that audio player is in use
-
-		// TODO: player options can have changed if already exists
-		media_player_new(&monologue->player, monologue);
-
 		media_player_opts_t opts = MPO(
 				.repeat = flags.repeat_times,
 				.start_pos = flags.start_pos,
@@ -3606,20 +3597,9 @@ const char *call_play_media_ng(ng_command_ctx_t *ctx) {
 				.codec_set = flags.codec_set,
 			);
 
-		if (flags.file.len) {
-			if (!media_player_play_file(monologue->player, &flags.file, opts))
-				return "Failed to start media playback from file";
-		}
-		else if (flags.blob.len) {
-			if (!media_player_play_blob(monologue->player, &flags.blob, opts))
-				return "Failed to start media playback from blob";
-		}
-		else if (flags.db_id > 0) {
-			if (!media_player_play_db(monologue->player, flags.db_id, opts))
-				return "Failed to start media playback from database";
-		}
-		else
-			return "No media file specified";
+		err = call_play_media_for_ml(monologue, opts, &flags.file, &flags.blob, flags.db_id, &flags);
+		if (err)
+			return err;
 
 		if (l == monologues.head && monologue->player->coder.duration)
 			parser->dict_add_int(ctx->resp, "duration", monologue->player->coder.duration);

daemon/media_player.c

@@ -1166,6 +1166,42 @@ bool media_player_init_file(struct media_player *mp, const str *file, media_play
 	return ret == 0;
 }
 
+const char * call_play_media_for_ml(struct call_monologue *ml,
+		media_player_opts_t opts,
+		const str * file,
+		const str * blob,
+		long long db_id,
+		sdp_ng_flags *flags)
+{
+#ifdef WITH_TRANSCODING
+	/* if mixing is enabled, codec handlers of all sources must be updated */
+	codec_update_all_source_handlers(ml, flags);
+
+	/* this starts the audio player if needed */
+	update_init_subscribers(ml, OP_PLAY_MEDIA);
+	/* media_player_new() now knows that audio player is in use
+	 * TODO: player options can have changed if already exists */
+	media_player_new(&ml->player, ml);
+
+	if (file->len) {
+		if (!media_player_play_file(ml->player, file, opts))
+			return "Failed to start media playback from file";
+	}
+	else if (blob->len) {
+		if (!media_player_play_blob(ml->player, blob, opts))
+			return "Failed to start media playback from blob";
+	}
+	else if (db_id > 0) {
+		if (!media_player_play_db(ml->player, db_id, opts))
+			return "Failed to start media playback from database";
+	}
+	else
+		return "No media file specified";
+	return NULL;
+#else
+	return "Not implemented";
+#endif
+}
 
 #ifdef WITH_TRANSCODING
 static int __mp_avio_read_wrap(void *opaque, uint8_t *buf, int buf_size) {

include/media_player.h

@@ -135,6 +135,13 @@ bool media_player_pt_match(const struct media_player *mp, const rtp_payload_type
 void media_player_add_packet(struct media_player *mp, char *buf, size_t len,
 		long long us_dur, unsigned long long pts);
 
+const char * call_play_media_for_ml(struct call_monologue *ml,
+		media_player_opts_t opts,
+		const str * file,
+		const str * blob,
+		long long db_id,
+		sdp_ng_flags *flags);
+
 void media_player_init(void);
 void media_player_free(void);
 void media_player_launch(void);