DecoderAPI: pass rvalue reference to decoder_tag()

src/DecoderAPI.cxx

@@ -471,19 +471,18 @@ decoder_data(struct decoder *decoder,
 
 enum decoder_command
 decoder_tag(G_GNUC_UNUSED struct decoder *decoder, struct input_stream *is,
-	    const Tag *tag)
+	    Tag &&tag)
 {
 	G_GNUC_UNUSED const struct decoder_control *dc = decoder->dc;
 	enum decoder_command cmd;
 
 	assert(dc->state == DECODE_STATE_DECODE);
 	assert(dc->pipe != NULL);
-	assert(tag != NULL);
 
 	/* save the tag */
 
 	delete decoder->decoder_tag;
-	decoder->decoder_tag = new Tag(*tag);
+	decoder->decoder_tag = new Tag(tag);
 
 	/* check for a new stream tag */
 
@@ -509,7 +508,7 @@ decoder_tag(G_GNUC_UNUSED struct decoder *decoder, struct input_stream *is,
 		delete merged;
 	} else
 		/* send only the decoder tag */
-		cmd = do_send_tag(decoder, *tag);
+		cmd = do_send_tag(decoder, *decoder->decoder_tag);
 
 	return cmd;
 }

src/DecoderAPI.hxx

@@ -141,8 +141,7 @@ decoder_data(struct decoder *decoder, struct input_stream *is,
  * command pending
  */
 enum decoder_command
-decoder_tag(struct decoder *decoder, struct input_stream *is,
-	    const Tag *tag);
+decoder_tag(struct decoder *decoder, struct input_stream *is, Tag &&tag);
 
 /**
  * Set replay gain values for the following chunks.

src/decoder/FlacDecoderPlugin.cxx

@@ -174,7 +174,7 @@ flac_decoder_loop(struct flac_data *data, FLAC__StreamDecoder *flac_dec,
 	while (true) {
 		if (data->tag != nullptr && !data->tag->IsEmpty()) {
 			cmd = decoder_tag(data->decoder, data->input_stream,
-					  data->tag);
+					  std::move(*data->tag));
 			delete data->tag;
 			data->tag = new Tag();
 		} else

src/decoder/MadDecoderPlugin.cxx

@@ -1084,7 +1084,8 @@ MadDecoder::Read()
 			ret = DecodeNextFrameHeader(&tag);
 
 			if (tag != nullptr) {
-				decoder_tag(decoder, input_stream, tag);
+				decoder_tag(decoder, input_stream,
+					    std::move(*tag));
 				delete tag;
 			}
 		} while (ret == DECODE_CONT);
@@ -1142,7 +1143,7 @@ mp3_decode(struct decoder *decoder, struct input_stream *input_stream)
 			    data.total_time);
 
 	if (tag != nullptr) {
-		decoder_tag(decoder, input_stream, tag);
+		decoder_tag(decoder, input_stream, std::move(*tag));
 		delete tag;
 	}
 

src/decoder/OpusDecoderPlugin.cxx

@@ -228,7 +228,7 @@ MPDOpusDecoder::HandleTags(const ogg_packet &packet)
 	if (ScanOpusTags(packet.packet, packet.bytes,
 			 &add_tag_handler, &tag) &&
 	    !tag.IsEmpty())
-		cmd = decoder_tag(decoder, input_stream, &tag);
+		cmd = decoder_tag(decoder, input_stream, std::move(tag));
 	else
 		cmd = decoder_get_command(decoder);
 

src/decoder/VorbisDecoderPlugin.cxx

@@ -158,7 +158,7 @@ vorbis_send_comments(struct decoder *decoder, struct input_stream *is,
 	if (!tag)
 		return;
 
-	decoder_tag(decoder, is, tag);
+	decoder_tag(decoder, is, std::move(*tag));
 	delete tag;
 }
 

test/dump_playlist.cxx

@@ -106,7 +106,7 @@ decoder_data(G_GNUC_UNUSED struct decoder *decoder,
 enum decoder_command
 decoder_tag(G_GNUC_UNUSED struct decoder *decoder,
 	    G_GNUC_UNUSED struct input_stream *is,
-	    G_GNUC_UNUSED const Tag *tag)
+	    G_GNUC_UNUSED Tag &&tag)
 {
 	return DECODE_COMMAND_NONE;
 }

test/read_tags.cxx

@@ -92,7 +92,7 @@ decoder_data(G_GNUC_UNUSED struct decoder *decoder,
 enum decoder_command
 decoder_tag(G_GNUC_UNUSED struct decoder *decoder,
 	    G_GNUC_UNUSED struct input_stream *is,
-	    G_GNUC_UNUSED const Tag *tag)
+	    G_GNUC_UNUSED Tag &&tag)
 {
 	return DECODE_COMMAND_NONE;
 }

test/run_decoder.cxx

@@ -113,7 +113,7 @@ decoder_data(G_GNUC_UNUSED struct decoder *decoder,
 enum decoder_command
 decoder_tag(G_GNUC_UNUSED struct decoder *decoder,
 	    G_GNUC_UNUSED struct input_stream *is,
-	    G_GNUC_UNUSED const Tag *tag)
+	    G_GNUC_UNUSED Tag &&tag)
 {
 	return DECODE_COMMAND_NONE;
 }