mirror of
https://github.com/Ysurac/openmptcprouter.git
synced 2025-02-15 04:42:02 +00:00
42 lines
1.6 KiB
Diff
42 lines
1.6 KiB
Diff
|
From e84199df6a504860f7e2b14008bee6f674f6f1c7 Mon Sep 17 00:00:00 2001
|
||
|
|
From: John Cox <jc@kynesim.co.uk>
|
||
|
|
Date: Fri, 22 Oct 2021 13:11:38 +0100
|
||
|
|
Subject: [PATCH 583/634] media: bcm2835-codec: Limit video callbacks
|
||
|
|
|
||
|
|
Limit the number of allowed video callbacks. This helps with limiting
|
||
|
|
the size of the coded input FIFO which in turn helps to control latency.
|
||
|
|
Choose -5 as the magic number as it translates to DPB+5 buffers which
|
||
|
|
has been proven to be a good number in the past.
|
||
|
|
|
||
|
|
Ideally coded buffers would not be returned to the user until they
|
||
|
|
had been decoded into the DPB or been discarded as bad, but that grade
|
||
|
|
of control is unavailable to us.
|
||
|
|
|
||
|
|
Signed-off-by: John Cox <jc@kynesim.co.uk>
|
||
|
|
---
|
||
|
|
.../vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c | 8 ++++++++
|
||
|
|
1 file changed, 8 insertions(+)
|
||
|
|
|
||
|
|
diff --git a/drivers/staging/vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c b/drivers/staging/vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c
|
||
|
|
index 6078d6e2ace0..e8452c82d088 100644
|
||
|
|
--- a/drivers/staging/vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c
|
||
|
|
+++ b/drivers/staging/vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c
|
||
|
|
@@ -2510,6 +2510,14 @@ static int bcm2835_codec_create_component(struct bcm2835_codec_ctx *ctx)
|
||
|
|
MMAL_PARAMETER_VIDEO_STOP_ON_PAR_COLOUR_CHANGE,
|
||
|
|
&enable,
|
||
|
|
sizeof(enable));
|
||
|
|
+
|
||
|
|
+ enable = (unsigned int)-5;
|
||
|
|
+ vchiq_mmal_port_parameter_set(dev->instance,
|
||
|
|
+ &ctx->component->control,
|
||
|
|
+ MMAL_PARAMETER_VIDEO_MAX_NUM_CALLBACKS,
|
||
|
|
+ &enable,
|
||
|
|
+ sizeof(enable));
|
||
|
|
+
|
||
|
|
} else if (dev->role == DEINTERLACE) {
|
||
|
|
/* Select the default deinterlace algorithm. */
|
||
|
|
int half_framerate = 0;
|
||
|
|
--
|
||
|
|
2.33.1
|
||
|
|
|