Hi, (I'm using alsa-driver-1.0.0rc1)
I have a question about the SNDRV_CARDS. normally it is defined as 8 ./alsa-kernel/core/memalloc.c: #define SNDRV_CARDS 8
Does that mean we can have a maximum of 8 soundcards in the PC or is this simply how many instances a certain module supports ? (eg I could have 8 emu10k instances, 8 sb16 instances etc ?).
Plus I noticed something in
./alsa-kernel/core/memalloc.c: static int enable[8] = {[0 ... (SNDRV_CARDS-1)] = 1};
shouldn't that be:
static int enable[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; ?is this a bug ? what happens if we set SNDRV_CARDS to a value > 8 ?
Does this generate memory corruption problems ?
(keep in mind I'm not familiar with the alsa-driver sourcebase so I could say nonsense)
I grepped the entire source for 'enable[' and the only place where I found enable[8] was
in the ./alsa-kernel/core/memalloc.c file.
Basically the reason why I wrote this mail is to ask if I can use more than 8 snd-serialmidi devices. Takashi gave me the module parameter options to make it work. (BTWthanks Takashi ! :-) )
options snd-serialmidi enable=1,1,1,1 sdev=/dev/ttyS2,/dev/ttyS3,/dev/ttyS4,/dev/ttyS5
but if you look at the drivers/serialmidi.c source
....
static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;static char *sdev[SNDRV_CARDS] = {"/dev/ttyS0", [1 ... (SNDRV_CARDS - 1)] = ""};
....
all arrays are of size SNDRV_CARDS this means that I can have max 8 serial devices.
So what do you suggest to allow for example 12 serial midi devices ? (via multi port serial card).
just set SNDRV_CARDS to 12 and fix the enable[8] statement in memalloc.c ?
Or should I simply use a local SNDRV_CARDS in serialmidi.c ? (eg #define SERIAL_SNDRV_CARDS 12) ?
(the latter is a hack so I guess it's more convenient to change the global SNDRV_CARDS define right ?).
I posted this mail just to be sure that alsa does not becomes unstable or something breaks because of the
define change.
Let me know please.
thanks, Benno http://www.linuxsampler.org
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