DecoderAPI: _replay_gain() returns void

Let the function decoder_replay_gain() update
decoder_control::replay_gain_db instead of letting each decoder plugin
take care for that.

src/DecoderAPI.cxx

@@ -519,11 +519,10 @@ decoder_tag(G_GNUC_UNUSED struct decoder *decoder, struct input_stream *is,
 	return cmd;
 }
 
-float
+void
 decoder_replay_gain(struct decoder *decoder,
 		    const struct replay_gain_info *replay_gain_info)
 {
-	float return_db = 0;
 	assert(decoder != NULL);
 
 	if (replay_gain_info != NULL) {
@@ -532,7 +531,7 @@ decoder_replay_gain(struct decoder *decoder,
 			serial = 1;
 
 		if (REPLAY_GAIN_OFF != replay_gain_mode) {
-			return_db = 20.0 * log10f(
+			decoder->dc->replay_gain_db = 20.0 * log10f(
 				replay_gain_tuple_scale(
 					&replay_gain_info->tuples[replay_gain_get_real_mode()],
 					replay_gain_preamp, replay_gain_missing_preamp,
@@ -551,19 +550,16 @@ decoder_replay_gain(struct decoder *decoder,
 		}
 	} else
 		decoder->replay_gain_serial = 0;
-
-	return return_db;
 }
 
 void
-decoder_mixramp(struct decoder *decoder, float replay_gain_db,
+decoder_mixramp(struct decoder *decoder,
 		char *mixramp_start, char *mixramp_end)
 {
 	assert(decoder != NULL);
 	struct decoder_control *dc = decoder->dc;
 	assert(dc != NULL);
 
-	dc->replay_gain_db = replay_gain_db;
 	dc_mixramp_start(dc, mixramp_start);
 	dc_mixramp_end(dc, mixramp_end);
 }

src/decoder/FLACCommon.cxx

@@ -109,7 +109,6 @@ void flac_metadata_common_cb(const FLAC__StreamMetadata * block,
 	struct replay_gain_info rgi;
 	char *mixramp_start;
 	char *mixramp_end;
-	float replay_gain_db = 0;
 
 	switch (block->type) {
 	case FLAC__METADATA_TYPE_STREAMINFO:
@@ -118,10 +117,10 @@ void flac_metadata_common_cb(const FLAC__StreamMetadata * block,
 
 	case FLAC__METADATA_TYPE_VORBIS_COMMENT:
 		if (flac_parse_replay_gain(&rgi, block))
-			replay_gain_db = decoder_replay_gain(data->decoder, &rgi);
+			decoder_replay_gain(data->decoder, &rgi);
 
 		if (flac_parse_mixramp(&mixramp_start, &mixramp_end, block))
-			decoder_mixramp(data->decoder, replay_gain_db,
+			decoder_mixramp(data->decoder,
 					mixramp_start, mixramp_end);
 
 		if (data->tag != nullptr)

src/decoder/mad_decoder_plugin.c

@@ -359,15 +359,14 @@ static void mp3_parse_id3(struct mp3_data *data, size_t tagsize,
 		struct replay_gain_info rgi;
 		char *mixramp_start;
 		char *mixramp_end;
-		float replay_gain_db = 0;
 
 		if (parse_id3_replay_gain_info(&rgi, id3_tag)) {
-			replay_gain_db = decoder_replay_gain(data->decoder, &rgi);
+			decoder_replay_gain(data->decoder, &rgi);
 			data->found_replay_gain = true;
 		}
 
 		if (parse_id3_mixramp(&mixramp_start, &mixramp_end, id3_tag))
-			decoder_mixramp(data->decoder, replay_gain_db,
+			decoder_mixramp(data->decoder,
 					mixramp_start, mixramp_end);
 	}
 

src/decoder_api.h

@@ -152,9 +152,8 @@ decoder_tag(struct decoder *decoder, struct input_stream *is,
  * @param decoder the decoder object
  * @param rgi the replay_gain_info object; may be NULL to invalidate
  * the previous replay gain values
- * @return the replay gain adjustment used
  */
-float
+void
 decoder_replay_gain(struct decoder *decoder,
 		    const struct replay_gain_info *replay_gain_info);
 
@@ -162,12 +161,11 @@ decoder_replay_gain(struct decoder *decoder,
  * Store MixRamp tags.
  *
  * @param decoder the decoder object
- * @param replay_gain_db the ReplayGain adjustment used for this song
  * @param mixramp_start the mixramp_start tag; may be NULL to invalidate
  * @param mixramp_end the mixramp_end tag; may be NULL to invalidate
  */
 void
-decoder_mixramp(struct decoder *decoder, float replay_gain_db,
+decoder_mixramp(struct decoder *decoder,
 		char *mixramp_start, char *mixramp_end);
 
 #endif

test/dump_playlist.cxx

@@ -113,7 +113,7 @@ decoder_tag(G_GNUC_UNUSED struct decoder *decoder,
 	return DECODE_COMMAND_NONE;
 }
 
-float
+void
 decoder_replay_gain(G_GNUC_UNUSED struct decoder *decoder,
 		    const struct replay_gain_info *replay_gain_info)
 {
@@ -127,13 +127,10 @@ decoder_replay_gain(G_GNUC_UNUSED struct decoder *decoder,
 	if (replay_gain_tuple_defined(tuple))
 		g_printerr("replay_gain[track]: gain=%f peak=%f\n",
 			   tuple->gain, tuple->peak);
-
-	return 0.0;
 }
 
 void
 decoder_mixramp(G_GNUC_UNUSED struct decoder *decoder,
-		G_GNUC_UNUSED float replay_gain_db,
 		char *mixramp_start, char *mixramp_end)
 {
 	g_free(mixramp_start);

test/read_tags.c

@@ -118,16 +118,14 @@ decoder_tag(G_GNUC_UNUSED struct decoder *decoder,
 	return DECODE_COMMAND_NONE;
 }
 
-float
+void
 decoder_replay_gain(G_GNUC_UNUSED struct decoder *decoder,
 		    G_GNUC_UNUSED const struct replay_gain_info *replay_gain_info)
 {
-	return 0.0;
 }
 
 void
 decoder_mixramp(G_GNUC_UNUSED struct decoder *decoder,
-		G_GNUC_UNUSED float replay_gain_db,
 		char *mixramp_start, char *mixramp_end)
 {
 	g_free(mixramp_start);

test/run_decoder.c

@@ -139,7 +139,7 @@ decoder_tag(G_GNUC_UNUSED struct decoder *decoder,
 	return DECODE_COMMAND_NONE;
 }
 
-float
+void
 decoder_replay_gain(G_GNUC_UNUSED struct decoder *decoder,
 		    const struct replay_gain_info *replay_gain_info)
 {
@@ -153,13 +153,10 @@ decoder_replay_gain(G_GNUC_UNUSED struct decoder *decoder,
 	if (replay_gain_tuple_defined(tuple))
 		g_printerr("replay_gain[track]: gain=%f peak=%f\n",
 			   tuple->gain, tuple->peak);
-
-	return 0.0;
 }
 
 void
 decoder_mixramp(G_GNUC_UNUSED struct decoder *decoder,
-		G_GNUC_UNUSED float replay_gain_db,
 		char *mixramp_start, char *mixramp_end)
 {
 	g_free(mixramp_start);