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Re: [Qemu-devel] [PATCH 09/11] paaudio: fix playback glitches
From: |
Zoltán Kővágó |
Subject: |
Re: [Qemu-devel] [PATCH 09/11] paaudio: fix playback glitches |
Date: |
Sun, 14 Jul 2019 17:21:09 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 |
On 2019-07-10 21:58, Marc-André Lureau wrote:
> On Tue, Jul 9, 2019 at 10:49 PM Kővágó, Zoltán <address@hidden> wrote:
>>
>> Pulseaudio normally assumes that when the server wants it, the client
>> can generate the audio samples and send it right away. Unfortunately
>> this is not the case with QEMU -- it's up to the emulated system when
>> does it generate the samples. Buffering the samples and sending them
>> from a background thread is just a workaround, that doesn't work too
>> well. Instead enable pa's compatibility support and let pa worry about
>> the details.
>>
>> Signed-off-by: Kővágó, Zoltán <address@hidden>
>
> Could you explain how this is related to PA_STREAM_ADJUST_LATENCY ?
According to the pulseaudio documentation[1], you can't use
PA_STREAM_ADJUST_LATENCY and PA_STREAM_EARLY_REQUESTS at the same time.
[1]:
https://www.freedesktop.org/software/pulseaudio/doxygen/def_8h.html#a6966d809483170bc6d2e6c16188850fca98e436f686fc385697e565eb1ecb2609
>> ---
>> audio/paaudio.c | 6 ++----
>> 1 file changed, 2 insertions(+), 4 deletions(-)
>>
>> diff --git a/audio/paaudio.c b/audio/paaudio.c
>> index 9d46f11b0a..d320d2e453 100644
>> --- a/audio/paaudio.c
>> +++ b/audio/paaudio.c
>> @@ -512,10 +512,8 @@ static pa_stream *qpa_simple_new (
>>
>> flags =
>> PA_STREAM_INTERPOLATE_TIMING
>> -#ifdef PA_STREAM_ADJUST_LATENCY
>> - | PA_STREAM_ADJUST_LATENCY
>> -#endif
>> - | PA_STREAM_AUTO_TIMING_UPDATE;
>> + | PA_STREAM_AUTO_TIMING_UPDATE
>> + | PA_STREAM_EARLY_REQUESTS;
>>
>> if (dev) {
>> /* don't move the stream if the user specified a sink/source */
>> --
>> 2.22.0
>>
>>
>
>
> --
> Marc-André Lureau
>
- [Qemu-devel] [PATCH 00/11] Multiple simultaneous audio backends, Kővágó, Zoltán, 2019/07/09
- [Qemu-devel] [PATCH 08/11] audio: do not run each backend in audio_run, Kővágó, Zoltán, 2019/07/09
- [Qemu-devel] [PATCH 06/11] paaudio: properly disconnect streams in fini_*, Kővágó, Zoltán, 2019/07/09
- [Qemu-devel] [PATCH 09/11] paaudio: fix playback glitches, Kővágó, Zoltán, 2019/07/09
- [Qemu-devel] [PATCH 05/11] paaudio: do not move stream when sink/source name is specified, Kővágó, Zoltán, 2019/07/09
- [Qemu-devel] [PATCH 03/11] audio: add audiodev properties to frontends, Kővágó, Zoltán, 2019/07/09
- [Qemu-devel] [PATCH 10/11] audio: remove read and write pcm_ops, Kővágó, Zoltán, 2019/07/09
- [Qemu-devel] [PATCH 01/11] audio: reduce glob_audio_state usage, Kővágó, Zoltán, 2019/07/09
- [Qemu-devel] [PATCH 02/11] audio: basic support for multi backend audio, Kővágó, Zoltán, 2019/07/09