kernel_optimize_test/sound
Clemens Ladisch 7efd8bc800 [ALSA] usb-audio: double-buffer all playback data
USB generic driver
We always had to use double buffering when capturing, and when playback
data for one URB crosses a buffer boundary.  The latter would make hwptr
updates less precise because the double-buffered data is read from the
buffer much earlier than the other data is read by the host controller.

Double-buffering all data allows to update hwptr immediately after the
data was copied to the USB buffer(s), which has the additional benefit
of avoiding the latency imposed by the host controller's delay of up to
one frame when interrupting.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
2005-08-30 08:45:43 +02:00
..
arm [ALSA] Fix compiler warnings in PXA2XX-AC97 2005-08-30 08:44:29 +02:00
core [ALSA] make local objects static 2005-08-30 08:45:01 +02:00
drivers [ALSA] use PCM interface for IEC958 controls 2005-08-30 08:43:39 +02:00
i2c [ALSA] ak4114: removed duplicate wake_up() 2005-07-28 12:09:18 +02:00
isa [ALSA] opl3sa2 - fixed typo in PnP BIOS IDs (YMF0021 -> YMH0021) 2005-08-30 08:45:32 +02:00
mips Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
oss Merge head 'upstream-fixes' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/misc-2.6 2005-08-23 20:00:48 -07:00
parisc Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pci [ALSA] Add new card ID. Fixes ALSA bug #1297 2005-08-30 08:45:38 +02:00
pcmcia [ALSA] vxpocket - Remove unused code 2005-07-28 12:09:58 +02:00
ppc [PATCH] Stop snd-powermac oopsing on non-pmac hardware. 2005-08-17 14:55:37 -07:00
sparc [ALSA] Add DBRI driver on Sparcs 2005-07-28 12:21:18 +02:00
synth [PATCH] create a kstrdup library function 2005-06-23 09:45:18 -07:00
usb [ALSA] usb-audio: double-buffer all playback data 2005-08-30 08:45:43 +02:00
Kconfig [PATCH] Kconfig fix (ISA_DMA_API and sound/*) 2005-08-23 18:43:40 -07:00
last.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
Makefile Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sound_core.c [PATCH] class: convert sound/* to use the new class api instead of class_simple 2005-06-20 15:15:07 -07:00
sound_firmware.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00