linux-toradex.git/include/sound/compress_driver.h, branch v3.12.2

ALSA: compress: fix drain calls blocking other compress functions (v6)

2013-11-29T19:27:58+00:00

commit f44f2a5417b2968a8724b352cc0b2545a6bcb1f4 upstream.

The drain and drain_notify callback were blocked by low level driver
until the draining was complete. Due to this being invoked with big
fat mutex held, others ops like reading timestamp, calling pause, drop
were blocked.

So to fix this we add a new snd_compr_drain_notify() API. This would
be required to be invoked by low level driver when drain or partial
drain has been completed by the DSP. Thus we make the drain and
partial_drain callback as non blocking and driver returns immediately
after notifying DSP.  The waiting is done while releasing the lock so
that other ops can go ahead.

[ The commit 917f4b5cba78 was wrongly applied from the preliminary
  patch.  This commit corrects to the final version.
  Sorry for inconvenience!  -- tiwai ]

Signed-off-by: Vinod Koul 
Signed-off-by: Takashi Iwai 
Signed-off-by: Greg Kroah-Hartman

ALSA: compress: fix drain calls blocking other compress functions

2013-11-29T19:27:58+00:00

commit 917f4b5cba78980a527098a910d94139d3e82c8d upstream.

The drain and drain_notify callback were blocked by low level driver untill the
draining was complete. Due to this being invoked with big fat mutex held, others
ops like reading timestamp, calling pause, drop were blocked.

So to fix this we add a new snd_compr_drain_notify() API. This would be required
to be invoked by low level driver when drain or partial drain has been completed
by the DSP. Thus we make the drain and partial_drain callback as non blocking
and driver returns immediately after notifying DSP.
The waiting is done while relasing the lock so that other ops can go ahead.

Signed-off-by: Vinod Koul 
Signed-off-by: Takashi Iwai 
Signed-off-by: Greg Kroah-Hartman

ALSA: compress_core: Rework writes to use cumulative values

2013-04-21T07:54:11+00:00

This patch reworks the writes to use cumulative values thus making the
app_pointer unecessary and removing it.

Only tested as far as build.

Signed-off-by: Charles Keepax 
Signed-off-by: Richard Fitzgerald 
Acked-by: Vinod Koul 
Signed-off-by: Takashi Iwai

ALSA: compress_core: Remove unused hw_pointer

2013-04-21T07:53:56+00:00

Only tested as far as build.

Signed-off-by: Charles Keepax 
Signed-off-by: Richard Fitzgerald 
Acked-by: Vinod Koul 
Signed-off-by: Takashi Iwai

ALSA: compress_core: Deconstify copy callback buffer

2013-04-21T07:53:00+00:00

The buffer passed to the copy callback should not be const because the
copy callback can be used for capture and playback.

Signed-off-by: Charles Keepax 
Signed-off-by: Richard Fitzgerald 
Acked-by: Vinod Koul 
Signed-off-by: Takashi Iwai

ALSA: compress: add support for gapless playback

2013-02-14T11:30:22+00:00

this add new API for sound compress to support gapless playback.
As noted in Documentation change, we add API to send metadata of encoder and
padding delay to DSP. Also add API for indicating EOF and switching to
subsequent track

Also bump the compress API version

Signed-off-by: Jeeja KP 
Signed-off-by: Vinod Koul 
Signed-off-by: Takashi Iwai

ASoC: add definations for compressed operations

2012-08-20T19:50:37+00:00

Here we update the asoc structures to add compress stream definations
First the struct snd_soc_dai_driver adds a new member to indicate if the dai is
compressed or pcm. Next we add a new structre the struct snd_soc_compr_ops in
the struct snd_soc_dai_link. This is to be used for machine driver to perform
any opertaions required for setting up compressed audio streams

next is the compressed data operations, they are added using struct
snd_compr_ops in the struct snd_soc_platform_driver.

Signed-off-by: Namarta Kohli 
Signed-off-by: Ramesh Babu K V 
Signed-off-by: Vinod Koul 
Signed-off-by: Mark Brown

ALSA: core: add API header and driver header files

2011-12-23T09:08:11+00:00

This patch adds the header files for ioctl definitions and header file for
driver APIs for lower level device drivers to use

Signed-off-by: Vinod Koul 
Signed-off-by: Pierre-Louis Bossart 
Signed-off-by: Takashi Iwai