Added gain_mul setting to soften effect of replaygain.

contrib/pianobar.1

@@ -364,6 +364,12 @@ Your pandora.com username.
 .B volume = 0
 Initial volume correction in dB. Usually between -30 and +5.
 
+.TP
+.B gain_mul = 1.0
+Pandora sends a ReplayGain value with every song. This sets a multiplier so that the gain adjustment can be
+reduced. 0.0 means no gain adjustment, 1.0 means full gain adjustment, values inbetween reduce the magnitude
+of gain adjustment.
+
 .SH REMOTE CONTROL
 .B pianobar
 can be controlled through a fifo. You have to create it yourself by executing

src/player.c

@@ -94,13 +94,13 @@ void BarPlayerSetVolume (player_t * const player) {
 	 * -> print to string and let them parse it again */
 	char strbuf[16];
 	snprintf (strbuf, sizeof (strbuf), "%fdB",
-			player->settings->volume + player->gain);
+			player->settings->volume + (player->gain * player->settings->gainMul));
 	assert (player->fgraph != NULL);
 	if ((ret = avfilter_graph_send_command (player->fgraph, "volume", "volume",
 					strbuf, NULL, 0, 0)) < 0) {
 #else
 	/* convert from decibel */
-	const double volume = pow (10, (player->settings->volume + player->gain) / 20);
+	const double volume = pow (10, (player->settings->volume + (player->gain * player->settings->gainMul)) / 20);
 	/* libav does not provide other means to set this right now. it might not
 	 * even work everywhere. */
 	assert (player->fvolume != NULL);

src/settings.c

@@ -160,6 +160,7 @@ void BarSettingsRead (BarSettings_t *settings) {
 	settings->autoselect = true;
 	settings->history = 5;
 	settings->volume = 0;
+	settings->gainMul = 1.0;
 	settings->maxPlayerErrors = 5;
 	settings->sortOrder = BAR_SORT_NAME_AZ;
 	settings->loveIcon = strdup (" <3");
@@ -362,6 +363,8 @@ void BarSettingsRead (BarSettings_t *settings) {
 				settings->atIcon = strdup (val);
 			} else if (streq ("volume", key)) {
 				settings->volume = atoi (val);
+			} else if (streq ("gain_mul", key)) {
+				settings->gainMul = atof (val);
 			} else if (streq ("format_nowplaying_song", key)) {
 				free (settings->npSongFormat);
 				settings->npSongFormat = strdup (val);

src/settings.h

@@ -87,6 +87,7 @@ typedef struct {
 	bool autoselect;
 	unsigned int history, maxPlayerErrors;
 	int volume;
+	float gainMul;
 	BarStationSorting_t sortOrder;
 	PianoAudioQuality_t audioQuality;
 	char *username;