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-rw-r--r--doc/mpd.conf.53
-rw-r--r--doc/mpdconf.example9
-rw-r--r--src/Makefile.am2
-rw-r--r--src/conf.c1
-rw-r--r--src/conf.h1
-rw-r--r--src/outputBuffer.c20
6 files changed, 35 insertions, 1 deletions
diff --git a/doc/mpd.conf.5 b/doc/mpd.conf.5
index 9f0fe59f1..809ea8dc7 100644
--- a/doc/mpd.conf.5
+++ b/doc/mpd.conf.5
@@ -92,6 +92,9 @@ Musepack, and MP3 (through ID3v2 replaygain tags, not APEv2) are supported.
.B replaygain_preamp <-15 to 15>
This is the gain (in dB) applied to songs with replaygain tags.
.TP
+.B volume_normalization <yes or no>
+If yes, mpd will normalize the volume of songs as they play. Default is no.
+.TP
.B audio_buffer_size <size in KiB>
This specifies the size of the audio output buffer that mpd uses. The default
is 2048.
diff --git a/doc/mpdconf.example b/doc/mpdconf.example
index 1dcfdf686..8f77a4ace 100644
--- a/doc/mpdconf.example
+++ b/doc/mpdconf.example
@@ -126,7 +126,7 @@ pid_file "~/.mpd/mpd.pid"
##########################################################
-################# REPLAYGAIN #############################
+################# Normalization ##########################
#
# Use Replay Gain (album or track)
# http://www.replaygain.org
@@ -138,6 +138,13 @@ pid_file "~/.mpd/mpd.pid"
#
#replaygain_preamp "0"
#
+# Normalization increases the amplitude of the audio
+# waveform to the maximum level without introducing any
+# distortion into the recording. This option will
+# normalize when replaygain is not on, utilizing the
+# CPU for calculation.
+#
+#volume_normalization "yes"
##########################################################
diff --git a/src/Makefile.am b/src/Makefile.am
index d4c8d57f2..d25732728 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -49,6 +49,7 @@ mpd_headers = \
metadataChunk.h \
mpd_types.h \
myfprintf.h \
+ normalize.h \
outputBuffer.h \
path.h \
pcm_utils.h \
@@ -93,6 +94,7 @@ mpd_SOURCES = \
main.c \
metadataChunk.c \
myfprintf.c \
+ normalize.c \
outputBuffer.c \
path.c \
pcm_utils.c \
diff --git a/src/conf.c b/src/conf.c
index 2a0ab2077..995cbf892 100644
--- a/src/conf.c
+++ b/src/conf.c
@@ -171,6 +171,7 @@ void initConf(void)
registerConfigParam(CONF_REPLAYGAIN_PREAMP, 0, 0);
registerConfigParam(CONF_METADATA_TO_USE, 0, 0);
registerConfigParam(CONF_ID3V1_ENCODING, 0, 0);
+ registerConfigParam(CONF_VOLUME_NORMALIZATION, 0, 0);
}
static void addBlockParam(ConfigParam * param, char *name, char *value,
diff --git a/src/conf.h b/src/conf.h
index fd68ca327..e0526b8a0 100644
--- a/src/conf.h
+++ b/src/conf.h
@@ -58,6 +58,7 @@
#define CONF_HTTP_PREBUFFER_SIZE "http_prebuffer_size"
#define CONF_METADATA_TO_USE "metadata_to_use"
#define CONF_ID3V1_ENCODING "id3v1_encoding"
+#define CONF_VOLUME_NORMALIZATION "volume_normalization"
typedef struct _BlockParam {
char *name;
diff --git a/src/outputBuffer.c b/src/outputBuffer.c
index 30a96bd22..02d9234fd 100644
--- a/src/outputBuffer.c
+++ b/src/outputBuffer.c
@@ -22,6 +22,8 @@
#include "playerData.h"
#include "utils.h"
#include "log.h"
+#include "normalize.h"
+#include "conf.h"
#include <string.h>
@@ -76,6 +78,22 @@ int sendDataToOutputBuffer(OutputBuffer * cb, InputStream * inStream,
size_t datalen;
static char *convBuffer = NULL;
static long convBufferLen = 0;
+ static int normalEnable = -1;
+ ConfigParam *param;
+
+ if (normalEnable == -1) {
+ normalEnable = getBoolConfigParam(CONF_VOLUME_NORMALIZATION);
+ if (normalEnable == -1) {
+ /* not set */
+ normalEnable = 0;
+ } else if (normalEnable < 0) {
+ param = getConfigParam(CONF_VOLUME_NORMALIZATION);
+ WARNING("%s is not \"yes\" or \"no\" on line %i, "
+ "disabling\n", CONF_VOLUME_NORMALIZATION,
+ param->line);
+ normalEnable = 0;
+ }
+ }
if (cmpAudioFormat(&(cb->audioFormat), &(dc->audioFormat)) == 0) {
data = dataIn;
@@ -99,6 +117,8 @@ int sendDataToOutputBuffer(OutputBuffer * cb, InputStream * inStream,
if (replayGainInfo) {
doReplayGain(replayGainInfo, data, datalen, &cb->audioFormat);
+ } else if (normalEnable) {
+ normalizeData(data, datalen, &cb->audioFormat);
}
while (datalen) {