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add input latency measurement

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add GETOSPACE support to module-oss


git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@205 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2004-09-16 00:05:56 +00:00
parent f5d47a293a
commit f9e2058820
20 changed files with 293 additions and 69 deletions
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28
polyp/polyplib-def.h
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@ -132,20 +132,26 @@ enum pa_subscription_event_type {
/** Return one if an event type t matches an event mask bitfield */
#define pa_subscription_match_flags(m, t) (!!((m) & (1 << ((t) & PA_SUBSCRIPTION_EVENT_FACILITY_MASK))))
/** A structure for latency info. See pa_stream_get_latency(). The
* total latency a sample that is written with pa_stream_write() takes
* to be played may be estimated by
* buffer_usec+sink_usec+transport_usec. The buffer to which
/** A structure for latency info. See pa_stream_get_latency(). The
* total output latency a sample that is written with
* pa_stream_write() takes to be played may be estimated by
* sink_usec+buffer_usec+transport_usec. The output buffer to which
* buffer_usec relates may be manipulated freely (with
* pa_stream_write()'s delta argument, pa_stream_flush() and friends),
* the playback buffer sink_usec relates to is a FIFO which cannot be
* flushed or manipulated in any way. */
* the buffers sink_usec/source_usec relates to is a first-in
* first-out buffer which cannot be flushed or manipulated in any
* way. The total input latency a sample that is recorded takes to be
* delivered to the application is:
* source_usec+buffer_usec+transport_usec-sink_usec. (Take care of
* sign issues!) When connected to a monitor source sink_usec contains
* the latency of the owning sink.*/
struct pa_latency_info {
pa_usec_t buffer_usec; /**< Time in usecs the current buffer takes to play */
pa_usec_t sink_usec; /**< Time in usecs a sample takes to be played on the sink. */
pa_usec_t transport_usec; /**< Estimated time in usecs a sample takes to be transferred to the daemon. \since 0.5 */
int playing; /**< Non-zero when the stream is currently playing */
uint32_t queue_length; /**< Queue size in bytes. */
pa_usec_t buffer_usec; /**< Time in usecs the current buffer takes to play. For both playback and record streams. */
pa_usec_t sink_usec; /**< Time in usecs a sample takes to be played on the sink. For playback streams and record streams connected to a monitor source. */
pa_usec_t source_usec; /**< Time in usecs a sample takes from being recorded to being delivered to the application. Only for record streams. \since 0.5*/
pa_usec_t transport_usec; /**< Estimated time in usecs a sample takes to be transferred to/from the daemon. For both playback and record streams. \since 0.5 */
int playing; /**< Non-zero when the stream is currently playing. Only for playback streams. */
uint32_t queue_length; /**< Queue size in bytes. For both playback and recrd streams. */
int synchronized_clocks; /**< Non-zero if the local and the
* remote machine have synchronized
* clocks. If synchronized clocks are