options: add --mute for setting initial audio mute status

Similar to --volume. Takes this as opportunity to move the variable
corresponding to --volume into MPOpts.

DOCS/man/en/options.rst

@@ -1158,6 +1158,10 @@
 --msgmodule
     Prepend module name in front of each console message.
 
+--mute=<auto|yes|no>
+    Set startup audio mute status. ``auto`` (default) will not change the mute
+    status. Also see ``--volume``.
+
 --name
     Set the window class name for X11-based video output methods.
 

core/cfg-mplayer.h

@@ -570,7 +570,11 @@ const m_option_t mplayer_opts[]={
                 {"auto", SOFTVOL_AUTO})),
     OPT_FLOATRANGE("softvol-max", softvol_max, 0, 10, 10000),
     {"volstep", &volstep, CONF_TYPE_INT, CONF_RANGE, 0, 100, NULL},
-    {"volume", &start_volume, CONF_TYPE_FLOAT, CONF_RANGE, -1, 10000, NULL},
+    OPT_FLOATRANGE("volume", mixer_init_volume, 0, -1, 10000),
+    OPT_CHOICE("mute", mixer_init_mute, 0,
+               ({"auto", -1},
+                {"no", 0},
+                {"yes", 1})),
     OPT_MAKE_FLAGS("gapless-audio", gapless_audio, 0),
     // override audio buffer size (used only by -ao oss/win32, obsolete)
     OPT_INT("abs", ao_buffersize, 0),

core/defaultopts.c

@@ -13,6 +13,8 @@ void set_default_mplayer_options(struct MPOpts *opts)
         .fixed_vo = 1,
         .softvol = SOFTVOL_AUTO,
         .softvol_max = 200,
+        .mixer_init_volume = -1,
+        .mixer_init_mute = -1,
         .ao_buffersize = -1,
         .vo_wintitle = "mpv - ${media-title}",
         .monitor_pixel_aspect = 1.0,

core/mplayer.c

@@ -103,7 +103,6 @@
 
 int slave_mode = 0;
 int enable_mouse_movements = 0;
-float start_volume = -1;
 
 #include "osdep/priority.h"
 
@@ -3947,8 +3946,11 @@ goto_enable_cache:
             audio_delay += mpctx->sh_video->stream_delay;
     }
     if (mpctx->sh_audio) {
-        if (start_volume >= 0)
-            mixer_setvolume(&mpctx->mixer, start_volume, start_volume);
+        if (opts->mixer_init_volume >= 0)
+            mixer_setvolume(&mpctx->mixer, opts->mixer_init_volume,
+                            opts->mixer_init_volume);
+        if (opts->mixer_init_mute >= 0)
+            mixer_setmute(&mpctx->mixer, opts->mixer_init_mute);
         if (!ignore_start)
             audio_delay -= mpctx->sh_audio->stream_delay;
     }

core/options.h

@@ -11,6 +11,8 @@ typedef struct MPOpts {
     char *mixer_device;
     char *mixer_channel;
     int softvol;
+    float mixer_init_volume;
+    int mixer_init_mute;
     float softvol_max;
     int gapless_audio;
     int ao_buffersize;