Re: au88x0_synth

[Raymond <rayau@netvigator.com>]

Takashi Iwai wrote:
> At Sun, 20 Mar 2005 09:11:08 +0800,
> Raymond wrote:
> 
>>
>>>>Lee Revell wrote:
>>>>Looks like this chipset has a wavetable synth.  And I noticed some
>>>>references to a driver on the openvortex list.  Would it be possible 
>>>>for ALSA to support it?
>>
>>>Manuel Jander wrote:
>>> Of course, but there are some unresolved hardware issues. The
>>> WaveTable helper hardware is very similar to the trident
>>> Wavetable helper hardware. It does not interpret MIDI directly, but
>>> at least does some effect processing in hardware.
>>
>>
>>http://sourceforge.net/mailarchive/message.php?msg_id=6004190
>>
>>1) Is the Trident Wavetable working ?
> 
> 
> Very limited.  It's no proper "MIDI" wavetable implementation.
> IIRC, only a module player worked with trident driver.
> 
> 
> 

If WT code compiled as a separate module au88x0-synth , it cannot direct 
call those functions in au88x0 module (e.g vortex_mix_setvolumebyte() )

Also there are a lot of warning messages "static function declared 
static but never defined" in au88x0.h because WT code need to include 
au88x0.h to get the definition of vortex_t.

#define SNDRV_SEQ_DEV_ID_AU88X0_SYNTH CARD_NAME_SHORT "-synth"

	if (snd_seq_device_new(card, 1, SNDRV_SEQ_DEV_ID_AU88X0_SYNTH,
			       sizeof(snd_vortex_synth_arg_t), &wt) < 0
	    || wt == NULL) {
		printk(KERN_INFO "Can't initialize au88x0 wavetable synth\n");
	} else {
		snd_vortex_synth_arg_t *arg;
		arg = SNDRV_SEQ_DEVICE_ARGPTR(wt);
		sprintf(wt->name, "%s Synth",CARD_NAME_SHORT);
		arg->chip = chip;
		arg->index = 1;
	}


As WT is present on the au8820/au8830 chip and not on another chip of
the sound card. (WT registers can be accessed by using vortex->mmio )

Is there any alternative way for keeping the WT code within module
au88x0 instead of a seperate module au88x0-synth ?


	if ((err = snd_device_new(card, SNDRV_DEV_SEQUENCER, wt, &ops)) < 0) {
		return err;
	}














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