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| author | Robin Gareus <robin@gareus.org> | 2015-12-04 17:08:45 +0100 |
|---|---|---|
| committer | Robin Gareus <robin@gareus.org> | 2015-12-04 17:08:45 +0100 |
| commit | 78a9791b5850e48dfcaf7045f443a082f14f58da (patch) | |
| tree | c45d8489e9c7e625672566e6a5aeaac6887df77d /libs/ardour/ardour/audio_backend.h | |
| parent | e9b0b4bcf036b144ed9ebd69ad6bfb27db44ae67 (diff) | |
add interface for latency updates w/o restarting the backend
This is useful for USB devices. Since there is a ringbuffer in the driver
(common on ALSA but also other platforms) to align the USB stream with
USB bus timing the latency can differ every time the device is re-opened.
Diffstat (limited to 'libs/ardour/ardour/audio_backend.h')
| -rw-r--r-- | libs/ardour/ardour/audio_backend.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libs/ardour/ardour/audio_backend.h b/libs/ardour/ardour/audio_backend.h index 0428c36b44..379eae9fd9 100644 --- a/libs/ardour/ardour/audio_backend.h +++ b/libs/ardour/ardour/audio_backend.h @@ -350,6 +350,11 @@ class LIBARDOUR_API AudioBackend : public PortEngine { */ virtual bool can_change_buffer_size_when_running () const = 0; + /** return true if the backend can measure and update + * systemic latencies without restart. + */ + virtual bool can_change_systemic_latency_when_running () const { return false; } + /* Set the hardware parameters. * * If called when the current state is stopped or paused, |