Re: PCM questions

[Takashi Iwai <tiwai@suse.de>]

At Thu, 04 Mar 2004 17:02:09 +0100,
Ove Kaaven wrote:
> 
> And for sound cards capable of hardware mixing, is there a way to have
> two PCMs that share a buffer, but can be still be started and stopped
> independently?

such a hardware also doesn't share the "buffer".
it supports the h/w mixing but each stream needs to have indepednet
buffer.

>  For example, if I've loaded an explosion sound into a PCM
> buffer, how can I start a lot of explosion sounds, without wasting a lot
> of RAM? Perhaps there's also a way to specify that this sound should be
> loaded into the sound card's onboard memory, instead of streamed from
> system RAM?

it sounds like wavetable function.  currently, it's designed for
MIDI-like apps, but it might be used for games, too.
anyway, it's under development (for a long long time)...

or, with PCM API, you can open several PCMs in a single application.
if the number of voices are limited, it won't be too heavy.


Takashi


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