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4 commits

Author SHA1 Message Date
Takashi Iwai
04145f2bfb ALSA: ctxfi - Add use_system_timer module option 
Added use_system_timer module option to force to use the system timer
instead of emu20k1 timer irq for debugging.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
 2009-06-08 21:32:26 +02:00
Takashi Iwai
54de6bc8b2 ALSA: ctxfi - Optimize the native timer handling using wc counter 
Optimize the timer update routine to look up wall clock once instead of
checking the position of each stream at each timer update.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
 2009-06-08 12:38:54 +02:00
Takashi Iwai
28cd4aa43d ALSA: ctxfi - Add missing inclusion of linux/math64.h 
Signed-off-by: Takashi Iwai <tiwai@suse.de>
 2009-06-05 18:07:12 +02:00
Takashi Iwai
b7bbf87608 ALSA: ctxfi - Use native timer interrupt on emu20k1 
emu20k1 has a native timer interrupt based on the audio clock, which
is more accurate than the system timer (from the synchronization POV).
This patch adds the code to handle this with multiple streams.

The system timer is still used on emu20k2, and can be used also for
emu20k1 easily by changing USE_SYSTEM_TIMER to 1 in cttimer.c.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
 2009-06-05 16:44:13 +02:00