Replace AOUT_VOLUME_MIN with 0

This assumption is correct and already present in plenty of code paths
(e.g. when converting to/from float).

include/vlc_aout_intf.h

@@ -29,7 +29,6 @@
 #define AOUT_VOLUME_DEFAULT             256
 #define AOUT_VOLUME_STEP                32
 #define AOUT_VOLUME_MAX                 1024
-#define AOUT_VOLUME_MIN                 0
 
 VLC_API audio_volume_t aout_VolumeGet( vlc_object_t * );
 #define aout_VolumeGet(a) aout_VolumeGet(VLC_OBJECT(a))

modules/control/rc.c

@@ -1498,13 +1498,12 @@ static int Volume( vlc_object_t *p_this, char const *psz_cmd,
         audio_volume_t i_volume = atoi( newval.psz_string );
         if ( (i_volume > (audio_volume_t)AOUT_VOLUME_MAX) )
         {
-            msg_rc( "Volume must be in the range %d-%d.", AOUT_VOLUME_MIN,
-                    AOUT_VOLUME_MAX );
+            msg_rc( "Volume must be in the range 0-%d.", AOUT_VOLUME_MAX );
             i_error = VLC_EBADVAR;
         }
         else
         {
-            if( i_volume == AOUT_VOLUME_MIN )
+            if( i_volume == 0 )
                 aout_ToggleMute( p_playlist, NULL );
             if( !aout_VolumeSet( p_playlist, i_volume ) )
                 i_error = VLC_SUCCESS;

modules/lua/libs/volume.c

@@ -52,8 +52,7 @@
 static int vlclua_volume_set( lua_State *L )
 {
     playlist_t *p_this = vlclua_get_playlist_internal( L );
-    int i_volume = __MAX(__MIN(luaL_checkint( L, 1 ), AOUT_VOLUME_MAX),
-                         AOUT_VOLUME_MIN);
+    int i_volume = __MAX(__MIN(luaL_checkint( L, 1 ), AOUT_VOLUME_MAX), 0);
     int i_ret = aout_VolumeSet( p_this, i_volume );
     return vlclua_push_ret( L, i_ret );
 }

src/audio_output/intf.c

@@ -164,8 +164,8 @@ int aout_VolumeUp (vlc_object_t *obj, int value, audio_volume_t *volp)
 
     prepareVolume (obj, &aout, &volume, &mute);
     value += volume;
-    if (value < AOUT_VOLUME_MIN)
-        volume = AOUT_VOLUME_MIN;
+    if (value < 0)
+        volume = 0;
     else
     if (value > AOUT_VOLUME_MAX)
         volume = AOUT_VOLUME_MAX;
@@ -201,7 +201,7 @@ int aout_ToggleMute (vlc_object_t *obj, audio_volume_t *volp)
     mute = !mute;
     ret = commitVolume (obj, aout, volume, mute);
     if (volp != NULL)
-        *volp = mute ? AOUT_VOLUME_MIN : volume;
+        *volp = mute ? 0 : volume;
     return ret;
 }
 
@@ -234,7 +234,7 @@ int aout_SetMute (vlc_object_t *obj, audio_volume_t *volp, bool mute)
     prepareVolume (obj, &aout, &volume, NULL);
     ret = commitVolume (obj, aout, volume, mute);
     if (volp != NULL)
-        *volp = mute ? AOUT_VOLUME_MIN : volume;
+        *volp = mute ? 0 : volume;
     return ret;
 }
 

src/libvlc-module.c

@@ -1591,10 +1591,10 @@ vlc_module_begin ()
 
     add_bool( "audio", 1, AUDIO_TEXT, AUDIO_LONGTEXT, false )
         change_safe ()
-    add_integer_with_range( "volume", AOUT_VOLUME_DEFAULT, AOUT_VOLUME_MIN,
+    add_integer_with_range( "volume", AOUT_VOLUME_DEFAULT, 0,
                             AOUT_VOLUME_MAX, VOLUME_TEXT,
                             VOLUME_LONGTEXT, false )
-    add_integer_with_range( "volume-step", AOUT_VOLUME_STEP, AOUT_VOLUME_MIN,
+    add_integer_with_range( "volume-step", AOUT_VOLUME_STEP, 0,
                             AOUT_VOLUME_MAX, VOLUME_STEP_TEXT,
                             VOLUME_STEP_LONGTEXT, true )
     add_integer( "aout-rate", 0, AOUT_RATE_TEXT,