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Merge pull request #62 from keithbowes/mono-option

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Added an option for mono output
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LibretroAdmin 2022-12-13 00:24:33 +01:00 committed by GitHub
commit d30c550522
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2 changed files with 36 additions and 3 deletions
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26
libretro/libretro.cpp
View File

@ -75,6 +75,11 @@ static enum {
SHOW_CROSSHAIR_ON, SHOW_CROSSHAIR_ON,
} show_crosshair; } show_crosshair;
static enum {
AUDIO_TYPE_MONO,
AUDIO_TYPE_STEREO,
} audio_type;
static bool libretro_supports_bitmasks = false; static bool libretro_supports_bitmasks = false;
static bool show_advanced_av_settings = true; static bool show_advanced_av_settings = true;
@ -1207,7 +1212,20 @@ static void check_variables(void)
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{ {
sound.SetVolume(Api::Sound::CHANNEL_S5B, atoi(var.value)); sound.SetVolume(Api::Sound::CHANNEL_S5B, atoi(var.value));
} }
var.key = "nestopia_audio_type";
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var))
{
if (strcmp(var.value, "mono") == 0)
{
audio_type = AUDIO_TYPE_MONO;
}
else
{
audio_type = AUDIO_TYPE_STEREO;
}
}
/* "Show settings" are not required if categories are supported */ /* "Show settings" are not required if categories are supported */
option_display.visible = !libretro_supports_option_categories; option_display.visible = !libretro_supports_option_categories;
@ -1264,8 +1282,10 @@ void retro_run(void)
draw_crosshair(crossx, crossy); draw_crosshair(crossx, crossy);
unsigned frames = is_pal ? SAMPLERATE / 50 : SAMPLERATE / 60; unsigned frames = is_pal ? SAMPLERATE / 50 : SAMPLERATE / 60;
for (unsigned i = 0; i < frames; i++) for (unsigned i = 0; i < frames; i++) {
audio_stereo_buffer[(i << 1) + 0] = audio_stereo_buffer[(i << 1) + 1] = audio_buffer[i]; audio_stereo_buffer[(i << 1) + 0] = audio_buffer[i];
audio_stereo_buffer[(i << 1) + 1] = audio_type == AUDIO_TYPE_STEREO ? audio_buffer[i] : 0;
}
bool updated = false; bool updated = false;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated) if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)

13
libretro/libretro_core_options.h
View File

@ -509,6 +509,19 @@ struct retro_core_option_v2_definition option_defs_us[] = {
}, },
"100" "100"
}, },
{
"nestopia_audio_type",
"Audio output",
NULL,
"Specify whether the audio output should be mono or stereo.",
NULL,
"audio",
{
{ "mono", NULL },
{ "stereo", NULL },
},
"stereo"
},
/* Input */ /* Input */