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Added --nostereo option

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Ability to disable stereo panning effect (e.g., paint brush, UI
elements sound effect feedback, etc.), useful for users with
hearing impairment in one ear, or situations where one speaker or
headphone is being used.  Use "--nostereo" command-line option
or "nostereo=yes" config. file option.
This commit is contained in:
Bill Kendrick 2019-09-21 16:33:55 -07:00
parent 9db366237c
commit f7d30d3222
13 changed files with 367 additions and 310 deletions
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38
src/playsound.c
View file

@ -1,7 +1,7 @@
/*
playsound.c
Copyright (c) 2002-2009
Copyright (c) 2002-2019
http://www.tuxpaint.org/
This program is free software; you can redistribute it and/or modify
@ -31,6 +31,7 @@ Mix_Chunk *sounds[NUM_SOUNDS];
int mute;
int use_sound = 1;
int use_stereo = 1;
static int old_sound[4] = { -1, -1, -1, -1 };
/**
@ -80,22 +81,31 @@ void playsound(SDL_Surface * screen, int chan, int s, int override, int x, int y
dist = (255 * ((screen->h - 1) - y)) / (screen->h - 1);
}
if (x == SNDPOS_LEFT)
left = 255 - dist;
else if (x == SNDPOS_CENTER)
left = (255 - dist) / 2;
else if (x == SNDPOS_RIGHT)
left = 0;
if (use_stereo)
{
if (x == SNDPOS_LEFT)
left = 255 - dist;
else if (x == SNDPOS_CENTER)
left = (255 - dist) / 2;
else if (x == SNDPOS_RIGHT)
left = 0;
else
{
if (x < 0)
x = 0;
else if (x >= screen->w)
x = screen->w - 1;
left = ((255 - dist) * ((screen->w - 1) - x)) / (screen->w - 1);
}
}
else
{
if (x < 0)
x = 0;
else if (x >= screen->w)
x = screen->w - 1;
left = ((255 - dist) * ((screen->w - 1) - x)) / (screen->w - 1);
/* Stereo disabled; treat everything like a SNDPOS_CENTER
(equal amount in each of the left/right channels) */
left = (255 - dist) / 2;
}
#ifdef DEBUG
printf("Panning of sound #%d in channel %d, left=%d, right=%d\n", s, chan, left, (255 - dist) - left);
fflush(stdout);