Kai Vehmanen wrote: > ... > In both cases, this value (hw_ptr) shows the status of sending data to an > separate entity, and one that has its own buffer (multiple ms) before the > actual DAC/ADC. > > So when application developer uses snd_pcm_delay(), the result is not > quite what the ALSA API says: ... snd_pcm_avail() returns the free part of the buffer. snd_pcm_delay() returns the filled part of the buffer plus the additional delay imposed by the device. The additional delay can be set by the driver in pcm_substream->runtime->delay. (Currently, only the USB audio driver bothers to set this.) HTH Clemens _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
