[alsa-devel] pointer callback question

hi all,

one question about the pointer callback.

the docs say:

This callback is called when the PCM middle layer inquires the current hardware position on the buffer. The position must be returned in

frames,

ranging from 0 to buffer_size - 1.

i am using a ringbuffer to communicate with my audio device. but when the position is reset to 0, alsa requests to stop the stream (SNDRV_PCM_TRIGGER_STOP).

the brief log is (4 periods of 64 frames): stream_pointer at 64 stream_pointer at 128 stream_pointer at 192 stream_pointer at 256 stream_pointer at 0

after returning 0, a stop is requested.

am i missing something? thanks, tim