Index: cfg-common.h
===================================================================
RCS file: /cvsroot/mplayer/main/cfg-common.h,v
retrieving revision 1.138
diff -u -p -r1.138 cfg-common.h
--- cfg-common.h	19 Jan 2005 18:05:03 -0000	1.138
+++ cfg-common.h	15 Feb 2005 09:19:24 -0000
@@ -139,6 +139,7 @@
 
 #ifdef USE_LIBA52
         {"a52drc", &a52_drc_level, CONF_TYPE_FLOAT, CONF_RANGE, 0, 1, NULL},
+        {"a52volume", &a52_volume, CONF_TYPE_FLOAT, CONF_RANGE, -200, 60, NULL},
 #endif
 
 // ------------------------- codec/vfilter options --------------------
@@ -315,6 +316,7 @@ extern int network_ipv4_only_proxy;
 #endif
 
 extern float a52_drc_level;
+extern float a52_volume;
 
 /* defined in libmpdemux: */
 extern int hr_mp3_seek;
Index: libmpcodecs/ad_liba52.c
===================================================================
RCS file: /cvsroot/mplayer/main/libmpcodecs/ad_liba52.c,v
retrieving revision 1.14
diff -u -p -r1.14 ad_liba52.c
--- libmpcodecs/ad_liba52.c	21 Sep 2004 20:34:46 -0000	1.14
+++ libmpcodecs/ad_liba52.c	15 Feb 2005 09:19:24 -0000
@@ -24,6 +24,9 @@ static uint32_t a52_flags=0;
 #define DRC_NO_COMPRESSION 1
 #define DRC_CALLBACK       2
 
+#define clamp(a,min,max) (((a)>(max))?(max):(((a)<(min))?(min):(a)))
+
+float a52_volume = 0.0;
 float a52_drc_level = 1.0;
 static int a52_drc_action = DRC_NO_ACTION;
 
@@ -122,7 +125,7 @@ static int preinit(sh_audio_t *sh)
 static int init(sh_audio_t *sh_audio)
 {
   uint32_t a52_accel=0;
-  sample_t level=1, bias=384;
+  sample_t level=pow(10.0,a52_volume/20.0), bias=384;
   int flags=0;
   /* Dolby AC3 audio:*/
   if(gCpuCaps.hasSSE) a52_accel|=MM_ACCEL_X86_SSE;
@@ -199,13 +202,16 @@ static int control(sh_audio_t *sh,int cm
       case ADCTRL_SKIP_FRAME:
 	  a52_fillbuff(sh); break; // skip AC3 frame
 	  return CONTROL_TRUE;
+      case ADCTRL_SET_VOLUME:
+	  a52_volume = clamp(*(float*)arg, -200.0, 60.0);
+	  return CONTROL_TRUE;
     }
   return CONTROL_UNKNOWN;
 }
 
 static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
 {
-    sample_t level=1, bias=384;
+    sample_t level=pow(10.0,a52_volume/20.0), bias=384;
     int flags=a52_flags|A52_ADJUST_LEVEL;
     int i,len=-1;
 	if(!sh_audio->a_in_buffer_len) 
Index: DOCS/man/en/mplayer.1
===================================================================
RCS file: /cvsroot/mplayer/main/DOCS/man/en/mplayer.1,v
retrieving revision 1.874
diff -u -p -r1.874 mplayer.1
--- DOCS/man/en/mplayer.1	13 Feb 2005 23:51:41 -0000	1.874
+++ DOCS/man/en/mplayer.1	15 Feb 2005 09:19:27 -0000
@@ -709,6 +709,14 @@ This option only shows an effect if the 
 compression information.
 .
 .TP
+.B \-a52volume <level>
+Adjusts the volume level for AC3 audio streams.
+<level> is a float value of the desired gain in dB ranging from -200dB to
++60dB.
+The result is similar to using the volume filter, but it is slightly
+faster and more accurate.
+.
+.TP
 .B \-aid <ID> (also see \-alang)
 Select audio channel (MPEG: 0\-31, AVI/\:OGM: 1\-99, ASF/\:RM: 0\-127,
 VOB(AC3): 128\-159, VOB(LPCM): 160\-191, MPEG-TS 17\-8190).