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node: add xrun counter in clock io

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Add an xrun counter in the clock that accumulated the duration of
xruns. Fill this in in alsa-pcm.

A client could use this to dectect xruns (when it changes) and to align
the position and nsec after an xrun.
This commit is contained in:
Wim Taymans 2023-08-28 12:26:11 +02:00
parent f134abdac0
commit e90cab1cde
2 changed files with 9 additions and 5 deletions
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6
spa/include/spa/node/io.h
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@ -117,7 +117,7 @@ struct spa_io_clock {
* is unique per clock and can be used to check if nodes
* share the same clock. */
uint64_t nsec; /**< time in nanoseconds against monotonic clock */
struct spa_fraction rate; /**< rate for position/duration/delay */
struct spa_fraction rate; /**< rate for position/duration/delay/xrun */
uint64_t position; /**< current position */
uint64_t duration; /**< duration of current cycle */
int64_t delay; /**< delay between position and hardware,
@ -129,8 +129,8 @@ struct spa_io_clock {
uint64_t target_duration; /**< target duration of next cycle */
uint32_t target_seq; /**< seq counter. must be equal at start and
* end of read and lower bit must be 0 */
uint32_t padding[3];
uint32_t padding;
uint64_t xrun; /**< estimated accumulated xrun duration */
};
/* the size of the video in this cycle */