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Use the plug: ALSA devices for surround sound formats, which have automatic sample format/rate conversion.

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Based on feedback from the ALSA development mailing list:
http://mailman.alsa-project.org/pipermail/alsa-devel/2009-October/022267.html

--HG--
branch : SDL-1.2
This commit is contained in:
Sam Lantinga
2009-10-13 09:59:20 +00:00
parent ffd9005e0f
commit 7d2e20993f
1 changed files with 11 additions and 6 deletions
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17
src/audio/alsa/SDL_alsa_audio.c
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@@ -43,9 +43,6 @@
/* The tag name used by ALSA audio */
#define DRIVER_NAME "alsa"
/* The default ALSA audio driver */
#define DEFAULT_DEVICE "default"
/* Whether we should set the buffer size or the period size */
/*#define SET_PERIOD_SIZE*/
/*#define DEBUG_PERIOD_SIZE*/
@@ -172,9 +169,17 @@ static const char *get_audio_device(int channels)
device = SDL_getenv("AUDIODEV"); /* Is there a standard variable name? */
if ( device == NULL ) {
if (channels == 6) device = "surround51";
else if (channels == 4) device = "surround40";
else device = DEFAULT_DEVICE;
switch (channels) {
case 6:
device = "plug:surround51";
break;
case 4:
device = "plug:surround40";
break;
default:
device = "default";
break;
}
}
return device;
}