Hi Chris,
> However, after about one flash of the RISC OS cursor, the emulator
> appears to freeze. It appears to still be running as everything else
> slows down as if CPU time is being used.
On Unix, you can get a `CPU %' reading of processes with `ps xu'.
Perhaps the Amiga has ways of monitoring what a process is doing?
> If I comment out this part of sound_poll, I get sound (of sorts, it
> just plays the garbage that was in the buffer when it was first
> allocated):
>
> if (SoundDMAFetch(buffer + localBufferWrite) == 1) {
> return;
> }
>
> What values does SoundDMAFetch return, and does anybody have any ideas
> why the code as above (which presumably works OK in the X version) is
> causing the emulation to hang here?
I don't know the sound code, but it looks like SoundDMAFetch()'s
returning 1 is causing sound_poll() to return. That's causes a more
time consuming poll because the logic is
void sound_poll(void)
{
delayProgress++;
if (delayProgress >= delayTotal) {
if (SoundDMAFetch(buffer + localBufferWrite) == 1) {
return;
}
delayProgress = 0;
}
}
so perhaps the resetting of delayProgress should be before the
SoundDMAFetch() call, i.e.
delayProgress++;
if (delayProgress >= delayTotal) {
delayProgress = 0;
if (SoundDMAFetch(buffer + localBufferWrite) == 1) {
return;
}
}
Or perhaps it's correct that it should only be reset if SoundDMAFetch()
returns something other than 1, hence the `>=' test rather than `=='.
> On a related note, why is there no sound_exit function? It opens the
> audio stream, allocates a buffer, but there is no deallocation that I
> can see? Surely we should have some form of sound clean-up function
> in sound.c?
I'm guessing that on process exit all it's resources are cleaned up
automatically.
Cheers,
Ralph.
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