[pulseaudio-tickets] [Bug 88503] New: ALSA application gets no timestamp information when using pulse plugin

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88503

            Bug ID: 88503
           Summary: ALSA application gets no timestamp information when
                    using pulse plugin
           Product: PulseAudio
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: alsa
          Assignee: pulseaudio-bugs at lists.freedesktop.org
          Reporter: sqweek at gmail.com
        QA Contact: pulseaudio-bugs at lists.freedesktop.org
                CC: lennart at poettering.net

In normal ALSA operation, you can enable timestamps on an audio stream using
the SND_PCM_TSTAMP_ENABLE flag to alsa_snd_pcm_sw_params_set_tstamp_mode().

Subsequently, calling alsa_snd_pcm_status_get_tstamp() (or the higher precision
get_htstamp) gives timing information.

On my machine this works fine with vanilla ALSA, but once I install an asoundrc
which specifies "type pulse" for pcm.!default and ctl.!default timing
information is no longer available (get_tstamp and get_htstamp always return
zero).

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