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# Date Author Comment
38cc9b60 10/17/2010 11:39 pm Jindrich Makovicka

issue snd_pcm_start() when capturing audio

snd_pcm_start() starts the capture process and ensures that the events
are delivered to the poll handler. Without the call, capture can be started
only when there is simultaneous playback running.

Signed-off-by: Jindrich Makovicka <>...

22d948a2 10/17/2010 11:39 pm Jindrich Makovicka

fix 100% CPU load when idle with ALSA

Playback control function did not disable polling when playback stops.
Caused busy spinning of the main loop due to unprocessed events.

Signed-off-by: Jindrich Makovicka <>
Signed-off-by: malc <>

8bb414d2 04/21/2010 02:40 pm malc

audio/alsa: Avoid snd_pcm_format_t vs audfmt_e mixup

Spotted by Serge Ziryukin and based on his patch, thanks.

Signed-off-by: malc <>

d9812b03 02/28/2010 05:34 pm malc

audio/alsa: Handle SND_PCM_STATE_SETUP in alsa_poll_handler

Signed-off-by: malc <>

f093feb7 02/28/2010 05:20 pm Vagrant Cascadian

audio/alsa: Spelling typo (paramters)

Trivial patch to fix the spelling of "parameters".

Signed-off-by: malc <>

a628b869 10/03/2009 02:30 am malc

oss/alsa: Do not invoke UB described in 7.15.1.1 (this time for ADC)

Signed-off-by: malc <>

de2ca4fb 10/02/2009 02:19 am malc

alsa: Change default buffer/period size

Increase buffer size but do not rely on ALSA picking up default period
size.

Signed-off-by: malc <>

301901b5 10/02/2009 01:37 am malc

oss/alsa: Do not invoke UB described in 7.15.1.1

Additional argument (whether to try poll mode) is only passed with
VOICE_ENABLE command.

Thanks to Markus Armbruster for noticing the potential breakage.

541ba4e7 09/18/2009 01:04 pm malc

alsa: use audio_pcm_hw_clip_out

Signed-off-by: malc <>

bdff253c 09/18/2009 01:04 pm malc

audio: internal API change

pcm_ops.run_out now takes number of live samples (which will be always
greater than zero) as a second argument, every driver was calling
audio_pcm_hw_get_live_out anyway with exception of fmod which used
audio_pcm_hw_get_live_out2 for no good reason....

6ebfda13 09/14/2009 02:55 am malc

alsa/oss: Remove fd transfer handlers before closing oss/alsa fd/handle

Signed-off-by: malc <>

b4f763b8 09/14/2009 02:55 am malc

alsa: Use proper value when testing returned events in alsa_poll_handler

Signed-off-by: malc <>

8b438ba3 09/12/2009 01:50 am malc

alsa: poll mode handling

Signed-off-by: malc <>

1dd3e4d1 08/11/2009 07:51 pm Juan Quintela

use C99 initializers for audio_pcm_ops

Signed-off-by: Juan Quintela <>

1a40d5e2 08/11/2009 07:51 pm Juan Quintela

use C99 initializers for all audio/*

Signed-off-by: Juan Quintela <>

98f9f48c 08/11/2009 07:51 pm malc

Aesthetics

Reformat to make item borders more visible
Fix cases of stray tabs and vertical misalignments

Signed-off-by: malc <>

bee37f32 08/11/2009 07:51 pm Juan Quintela

Use proper struct initializers and remove INIT_FIELD() macro

Signed-off-by: Juan Quintela <>

2700efa3 08/11/2009 07:51 pm Juan Quintela

Use C99 initializers for audio_option

Signed-off-by: Juan Quintela <>

86635821 07/30/2009 01:45 pm Bjørn Mork

alsa: add host suspend/resume support

Both input and output streams may be in SND_PCM_STATE_SUSPENDED
after the host is suspended and resumed, meaning "Hardware is
suspended". snd_pcm_readi() and snd_pcm_writei() will return
-ESTRPIPE if called while the stream is in this state....

2637872b 07/17/2009 04:57 am malc

Ignore -Waddress for alsaaudio.c

/usr/include/alsa/pcm.h contains:

#define snd_pcm_sw_params_alloca(ptr) do { assert(ptr); *ptr = (snd_pcm_sw_params_t *) alloca(snd_pcm_sw_params_sizeof()); memset(*ptr, 0, snd_pcm_sw_params_sizeof()); } while (0)

The assert generates: "error: the address of 'sw_params' will always...

97f155dd 06/18/2009 09:57 pm Gerd Hoffmann

alsa: fix warning

Signed-off-by: Gerd Hoffmann <>

1ea879e5 12/04/2008 12:48 am malc

Make audio violate POSIX less

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5864 c046a42c-6fe2-441c-8c8c-71466251a162

35f4b58c 10/06/2008 09:08 pm blueswir1

Prepare for changing audio_pcm_ops dynamically (partially revert r5422)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5435 c046a42c-6fe2-441c-8c8c-71466251a162

8869defe 10/05/2008 01:01 pm blueswir1

Make audio_pcm_opsstatic const

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5422 c046a42c-6fe2-441c-8c8c-71466251a162

adf7d8fb 07/09/2008 10:25 pm malc

Restore old value of buffer_size

This brings latency down to acceptable levels when using dmix

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4865 c046a42c-6fe2-441c-8c8c-71466251a162

64333899 07/09/2008 10:25 pm malc

Warn about rejected buffer/period size/time when it was specified by the user

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4864 c046a42c-6fe2-441c-8c8c-71466251a162

a7bb29ba 07/09/2008 10:25 pm malc

Call proper function when trying to set period size

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4863 c046a42c-6fe2-441c-8c8c-71466251a162

23fb600b 07/03/2008 02:29 pm malc

Fix typo

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4835 c046a42c-6fe2-441c-8c8c-71466251a162

f3b52983 06/21/2008 11:09 pm malc

Emit warning message if user supplied buffer/period size/time was rejected

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4773 c046a42c-6fe2-441c-8c8c-71466251a162

7a24c800 06/21/2008 08:14 pm malc

Rework period/buffer size setting

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4768 c046a42c-6fe2-441c-8c8c-71466251a162

ca9cc28c 01/14/2008 06:24 am balrog

pthreads-based audio and miscellaneous audio clean-up (malc).
ESD support (malc, Frederick Reeve).

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3917 c046a42c-6fe2-441c-8c8c-71466251a162

60fe76f3 12/16/2007 05:02 am ths

Fix wrong signedness, by Andre Przywara.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3815 c046a42c-6fe2-441c-8c8c-71466251a162

749bc4bf 11/17/2007 07:35 pm pbrook

Remove stray uses of vl.h.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3675 c046a42c-6fe2-441c-8c8c-71466251a162

fe8f096b 07/12/2007 01:59 pm ths

Spelling fix, by Stuart Brady.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3076 c046a42c-6fe2-441c-8c8c-71466251a162

5a1237c4 05/02/2007 05:11 am balrog

Don't define HIGH_LATENCY for ARM, this was a workaround for an ALSA problem.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2766 c046a42c-6fe2-441c-8c8c-71466251a162

f941aa25 02/18/2007 12:19 am ths

Qemu support for S32 and U32 alsa output, by Vassili Karpov.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2427 c046a42c-6fe2-441c-8c8c-71466251a162

d929eba5 07/05/2006 12:47 am bellard

audio endianness API changes (malc)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2042 c046a42c-6fe2-441c-8c8c-71466251a162

8ead62cf 07/04/2006 07:51 pm bellard

audio fixes + initial audio capture support (malc)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2040 c046a42c-6fe2-441c-8c8c-71466251a162

32d448c4 11/20/2005 08:53 pm bellard

added LF missing in logs (malc)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1637 c046a42c-6fe2-441c-8c8c-71466251a162

571ec3d6 11/20/2005 06:24 pm bellard

audio merge (malc)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1636 c046a42c-6fe2-441c-8c8c-71466251a162

4787c71d 11/11/2005 02:06 am bellard

debug fix (malc)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1619 c046a42c-6fe2-441c-8c8c-71466251a162

c0fe3827 11/05/2005 08:55 pm bellard

audio merge (malc)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1601 c046a42c-6fe2-441c-8c8c-71466251a162

1d14ffa9 10/30/2005 08:58 pm bellard

merged 15a_aqemu.patch audio patch (malc)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1584 c046a42c-6fe2-441c-8c8c-71466251a162