diff options
| author | Deborah Brouwer <deborahbrouwer3563@gmail.com> | 2021-04-26 20:29:47 -0700 |
|---|---|---|
| committer | Hans Verkuil <hverkuil-cisco@xs4all.nl> | 2021-04-27 08:03:14 +0200 |
| commit | 44c27e506c1eec1a011f47cd9f146f4ac7caf14b (patch) | |
| tree | 7bafe9e90ffaa6ce7c3237d7da2b8ee4b599be20 | |
| parent | b36d9f24c14eb7b761d9bdbd636ac65ed5c00232 (diff) | |
| download | v4l-utils-44c27e506c1eec1a011f47cd9f146f4ac7caf14b.tar.gz | |
cec-follower: increase precision of Audio Rate Control active sensing
Measure the interval since the last audio rate control message in
nanoseconds instead of seconds. Increasing the precision catches audio
rate messages that are late by less than a second.
Signed-off-by: Deborah Brouwer <deborahbrouwer3563@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
| -rw-r--r-- | utils/cec-follower/cec-processing.cpp | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/utils/cec-follower/cec-processing.cpp b/utils/cec-follower/cec-processing.cpp index 93db4059..fcb55df2 100644 --- a/utils/cec-follower/cec-processing.cpp +++ b/utils/cec-follower/cec-processing.cpp @@ -29,8 +29,8 @@ /* Time between each polling message sent to a device */ #define POLL_PERIOD 15000 -/* The maximum interval in seconds between audio rate messages as defined in the spec */ -#define MAX_AUD_RATE_MSG_INTERVAL 2 +/* The maximum interval in nanoseconds between audio rate messages as defined in the spec */ +#define MAX_AUD_RATE_MSG_INTERVAL_NS (2 * 1000000000ULL) struct cec_enum_values { const char *type_name; @@ -241,8 +241,8 @@ static void aud_rate_msg_interval_check(__u64 ts_new, __u64 ts_old) * turned off the audio rate control. */ if (ts_old) { - unsigned interval = (ts_new - ts_old) / 1000000000; - if (interval > MAX_AUD_RATE_MSG_INTERVAL) { + __u64 interval = ts_new - ts_old; + if (interval > MAX_AUD_RATE_MSG_INTERVAL_NS) { warn("The interval between Audio Rate Control messages was greater\n"); warn("than the Maxiumum Audio Rate Message Interval (2s).\n"); } |