On Thursday 03 September 2009 21:10, Manuel Jander wrote:

does anybody still have a AU88x0 card ? I know they are quite ancient now, but if anyone could give the attached patch a try ? Would be nice. I made the patch against linux-2.6.30.4 http://micro.homelinux.net/~mjander/au88x0.diff.gz http://micro.homelinux.net/%7Emjander/au88x0.diff.gz

Best Regards, Manuel

Which version of audaicous (1.5.x or 2.1) are you testing ? (alsa-gapless or alsa-ng plugin)

au88x0 most likely cannot support 1 sample per period because of the FIFO as described in patent 6167465.

if you look at the source code of alsa-ng and alsa-gapless plugin both of them use the own way to calculate the buffer size instead of using snd_pcm_hw_params_get_buffer_size()

http://hg.atheme.org/audacious-plugins/file/2c0a9bba77d7/src/alsa-ng/alsa-co...

CHECK_FAIL (snd_pcm_hw_params_set_access (pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED), "snd_pcm_hw_params_set_access"); CHECK_FAIL (snd_pcm_hw_params_set_format (pcm_handle, hwparams, afmt), "snd_pcm_hw_params_set_format"); CHECK_FAIL (snd_pcm_hw_params_set_channels (pcm_handle, hwparams, nch), "snd_pcm_hw_params_set_channels"); CHECK_FAIL (snd_pcm_hw_params_set_rate (pcm_handle, hwparams, rate, 0), "snd_pcm_hw_params_set_rate"); CHECK_FAIL (snd_pcm_hw_params (pcm_handle, hwparams), "snd_pcm_hw_params"); bitwidth = snd_pcm_format_physical_width(afmt); bps = (rate * bitwidth * nch) >> 3; buf_size = MAX(aud_cfg->output_buffer_size, 100); ringbuf_size = buf_size * bps / 1000;

How do you get the "ADB Ctrl failure" error ?

There are two main problem of the au88x0 driver 1) alsa is unable to calculate the correct value for the three functions snd_pcm_hw_params_set_buffer_time_near() , snd_pcm_hw_params_set_period_time_near() and snd_pcm_set_params()

https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1724

Test case :

alsa-lib/test/pcm_min.c ( change default to hw:0,0 )

Real world case:

gstreamer and winealsa.drv

2) unable to recover when the number of available src is not enough (FATAL: ResManager: resource type 1 exhaust)

https://bugtrack.alsa-project.org/alsa-bug/view.php?id=2228

test case :

running application to use 15 src ( 7 stereo and one mono stream ) and open another stereo stream