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v4l2: set latency on port

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Use the duration of one frame as the latency.

See #3910
This commit is contained in:
Wim Taymans 2024-03-22 11:15:10 +01:00
parent 58d626fec8
commit 842ac9e110
2 changed files with 15 additions and 9 deletions
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15
spa/plugins/v4l2/v4l2-utils.c
View file

@ -1012,10 +1012,6 @@ static int spa_v4l2_set_format(struct impl *this, struct spa_video_info *format,
dev->have_format = true;
size->width = fmt.fmt.pix.width;
size->height = fmt.fmt.pix.height;
port->rate.denom = framerate->num = streamparm.parm.capture.timeperframe.denominator;
port->rate.num = framerate->denom = streamparm.parm.capture.timeperframe.numerator;
probe_expbuf(this);
port->fmt = fmt;
port->info.change_mask |= SPA_PORT_CHANGE_MASK_FLAGS | SPA_PORT_CHANGE_MASK_RATE;
@ -1023,7 +1019,10 @@ static int spa_v4l2_set_format(struct impl *this, struct spa_video_info *format,
SPA_PORT_FLAG_LIVE |
SPA_PORT_FLAG_PHYSICAL |
SPA_PORT_FLAG_TERMINAL;
port->info.rate = SPA_FRACTION(port->rate.num, port->rate.denom);
port->info.rate.num = streamparm.parm.capture.timeperframe.numerator;
port->info.rate.denom = streamparm.parm.capture.timeperframe.denominator;
probe_expbuf(this);
return match ? 0 : 1;
}
@ -1376,16 +1375,16 @@ static int mmap_read(struct impl *this)
if (this->clock) {
/* FIXME, we should follow the driver clock and target_ values.
* for now we ignore and use our own. */
this->clock->target_rate = port->rate;
this->clock->target_rate = port->info.rate;
this->clock->target_duration = 1;
this->clock->nsec = pts;
this->clock->rate = port->rate;
this->clock->rate = port->info.rate;
this->clock->position = buf.sequence;
this->clock->duration = 1;
this->clock->delay = 0;
this->clock->rate_diff = 1.0;
this->clock->next_nsec = pts + 1000000000LL / port->rate.denom;
this->clock->next_nsec = pts + port->info.rate.num * SPA_NSEC_PER_SEC / port->info.rate.denom;
}
b = &port->buffers[buf.index];