Re: [pulseaudio-discuss] Controlling alsa and pulseaudio buffer size?
On Wed, Sep 14, 2011 at 4:30 PM, Kurt Taylor kurt.tay...@linaro.org wrote: On 14 September 2011 16:25, Raymond Toy r...@google.com wrote: In my application, I'm using alsa to set a particular buffer size. Alsa usually complies, but from everything that I can tell, pulse audio is using some other fragment size. This other fragment size also seems to be the time betwen interrupts which my application sees. This messes up my application because it wants the interrupts at regular intervals based on the buffer size I set. Is there some way to make alsa and pulseaudio agree on the size? It is possible to turn off the ALSA period wakes in tschedule mode on some hardware. This would allow pulseaudio to manage it. See this thread: http://lists.freedesktop.org/archives/pulseaudio-discuss/2011-January/008638.html So I should call snd_pcm_hw_params_get_period_wakeup to turn off the ALSA period wakeups? Then pulseaudio will manage it and use the period size that I have set? Ray ___ pulseaudio-discuss mailing list pulseaudio-discuss@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
Re: [pulseaudio-discuss] Controlling alsa and pulseaudio buffer size?
On Wed, Sep 14, 2011 at 5:21 PM, pierre-louis.boss...@linux.intel.comwrote: In my application, I'm using alsa to set a particular buffer size. Alsa usually complies, but from everything that I can tell, pulse audio is using some other fragment size. This other fragment size also seems to be the time betwen interrupts which my application sees. This messes up my application because it wants the interrupts at regular intervals based on the buffer size I set. Is there some way to make alsa and pulseaudio agree on the size? It is possible to turn off the ALSA period wakes in tschedule mode on some hardware. This would allow pulseaudio to manage it. See this thread: http://lists.freedesktop.org/archives/pulseaudio-discuss/2011-January/008638.html Have you played with the ADJUST_LATENCY flag? If it is not set, then the total latency will not match the buffer size you configure. I'm using ALSA, so I don't know how to set the ADJUST_LATENCY flag. Any hints appreciated! Ray ___ pulseaudio-discuss mailing list pulseaudio-discuss@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
[pulseaudio-discuss] Controlling alsa and pulseaudio buffer size?
In my application, I'm using alsa to set a particular buffer size. Alsa usually complies, but from everything that I can tell, pulse audio is using some other fragment size. This other fragment size also seems to be the time betwen interrupts which my application sees. This messes up my application because it wants the interrupts at regular intervals based on the buffer size I set. Is there some way to make alsa and pulseaudio agree on the size? Ray ___ pulseaudio-discuss mailing list pulseaudio-discuss@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
Re: [pulseaudio-discuss] Controlling alsa and pulseaudio buffer size?
On 14 September 2011 16:25, Raymond Toy r...@google.com wrote: In my application, I'm using alsa to set a particular buffer size. Alsa usually complies, but from everything that I can tell, pulse audio is using some other fragment size. This other fragment size also seems to be the time betwen interrupts which my application sees. This messes up my application because it wants the interrupts at regular intervals based on the buffer size I set. Is there some way to make alsa and pulseaudio agree on the size? It is possible to turn off the ALSA period wakes in tschedule mode on some hardware. This would allow pulseaudio to manage it. See this thread: http://lists.freedesktop.org/archives/pulseaudio-discuss/2011-January/008638.html Ray ___ pulseaudio-discuss mailing list pulseaudio-discuss@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss -- Kurt Taylor (irc krtaylor) Linaro Multimedia Team Lead Linaro.org http://www.linaro.org/* **│ *Open source software for ARM SoCs Follow *Linaro: *Facebook http://www.facebook.com/pages/Linaro | Twitterhttp://twitter.com/#%21/linaroorg| Blog http://www.linaro.org/linaro-blog/ ___ pulseaudio-discuss mailing list pulseaudio-discuss@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
Re: [pulseaudio-discuss] Controlling alsa and pulseaudio buffer size?
In my application, I'm using alsa to set a particular buffer size. Alsa usually complies, but from everything that I can tell, pulse audio is using some other fragment size. This other fragment size also seems to be the time betwen interrupts which my application sees. This messes up my application because it wants the interrupts at regular intervals based on the buffer size I set. Is there some way to make alsa and pulseaudio agree on the size? It is possible to turn off the ALSA period wakes in tschedule mode on some hardware. This would allow pulseaudio to manage it. See this thread: http://lists.freedesktop.org/archives/pulseaudio-discuss/2011-January/008638.html Have you played with the ADJUST_LATENCY flag? If it is not set, then the total latency will not match the buffer size you configure. -Pierre ___ pulseaudio-discuss mailing list pulseaudio-discuss@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
