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stream: update pw_time docs a little.

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See #2241
This commit is contained in:
Wim Taymans 2022-03-26 20:01:24 +01:00
parent 4dff7f0e5f
commit 34380ff02e
1 changed files with 16 additions and 5 deletions
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21
src/pipewire/stream.h
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@ -193,13 +193,24 @@ struct pw_stream_control {
/** A time structure */
struct pw_time {
int64_t now; /**< the monotonic time in nanoseconds */
struct spa_fraction rate; /**< the rate of \a ticks and delay */
int64_t now; /**< the monotonic time in nanoseconds. This is the time
* when this time report was updated. It is usually
* updated every graph cycle. You can use the current
* monotonic time to calculate the elapsed time between
* this report and the current state and calculate
* updated ticks and delay values. */
struct spa_fraction rate; /**< the rate of \a ticks and delay. This is usually
* expressed in 1/<samplerate>. */
uint64_t ticks; /**< the ticks at \a now. This is the current time that
* the remote end is reading/writing. */
int64_t delay; /**< delay to device, add to ticks to get the time of the
* device. Positive for INPUT streams and
* negative for OUTPUT streams. */
int64_t delay; /**< delay to device. This is the time it will take for
* the next sample in the stream to be presented by
* the playback device or the time a sample traveled
* from the capture device. This delay includes the
* delay introduced by all filters on the path between
* the stream and the device. The delay is normally
* constant in a graph and can change when the topology
* of the graph or the quantum changes. */
uint64_t queued; /**< data queued in the stream, this is the sum
* of the size fields in the pw_buffer that are
* currently queued */