| Message ID | 03c855c4a2072a4a174415198e2e44932af75fcd.1619389023.git.deborahbrouwer3563@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | cec-follower: increase accuracy Audio Rate Control | expand |
On 26/04/2021 00:54, Deborah Brouwer wrote: > If the controlling device simply stops sending audio rate messages, give > the cec-follower the ability to detect that it has not received an audio > rate message within 2 seconds as required. The cec-follower will quit the > audio rate controlled mode. Eliminate the need to measure an interval > between two audio rate messages. > > Signed-off-by: Deborah Brouwer <deborahbrouwer3563@gmail.com> > --- > utils/cec-follower/cec-processing.cpp | 20 +++++++++++++------- > 1 file changed, 13 insertions(+), 7 deletions(-) > > diff --git a/utils/cec-follower/cec-processing.cpp b/utils/cec-follower/cec-processing.cpp > index 243c9d09..dd6fd05c 100644 > --- a/utils/cec-follower/cec-processing.cpp > +++ b/utils/cec-follower/cec-processing.cpp > @@ -233,19 +233,22 @@ static __u8 current_power_state(struct node *node) > return CEC_OP_POWER_STATUS_TO_STANDBY; > } > > -static void aud_rate_msg_interval_check(__u64 ts_new, __u64 ts_old) > +static void aud_rate_msg_interval_check(struct node *node, __u64 ts_new) > { > /* > - * The interval between messages is not relevant if this is the > - * first audio rate control message or if the previous message > - * turned off the audio rate control. > + * The interval since the last audio rate message is not relevant > + * unless the Source is currently in audio rate controlled mode. I think this can be clarified if you extend the comment a bit and avoid the double negation (not...unless): * The interval since the last audio rate message is only relevant * if the Source is currently in audio rate controlled mode * (i.e. state.last_aud_rate_rx_ts != 0). > */ > + __u64 ts_old = node->state.last_aud_rate_rx_ts; > + > if (ts_old) { > __u64 interval = ts_new - ts_old; > > if (interval > MAX_AUD_RATE_MSG_INTERVAL) { > - warn("The interval between Audio Rate Control messages was greater\n"); > + warn("The interval since the last Audio Rate Control message was greater\n"); > warn("than the Maxiumum Audio Rate Message Interval (2s).\n"); This is a bit too verbose. How about this: warn("The interval since the last Audio Rate Control message was > 2s.\n"); Regards, Hans > + warn("Turning off audio rate control.\n"); > + node->state.last_aud_rate_rx_ts = 0; > } > } > } > @@ -803,7 +806,7 @@ static void processMsg(struct node *node, struct cec_msg &msg, unsigned me) > > switch (msg.msg[2]) { > case CEC_OP_AUD_RATE_OFF: > - aud_rate_msg_interval_check(msg.rx_ts, node->state.last_aud_rate_rx_ts); > + aud_rate_msg_interval_check(node, msg.rx_ts); > node->state.last_aud_rate_rx_ts = 0; > return; > case CEC_OP_AUD_RATE_WIDE_STD: > @@ -812,7 +815,7 @@ static void processMsg(struct node *node, struct cec_msg &msg, unsigned me) > case CEC_OP_AUD_RATE_NARROW_STD: > case CEC_OP_AUD_RATE_NARROW_FAST: > case CEC_OP_AUD_RATE_NARROW_SLOW: > - aud_rate_msg_interval_check(msg.rx_ts, node->state.last_aud_rate_rx_ts); > + aud_rate_msg_interval_check(node, msg.rx_ts); > node->state.last_aud_rate_rx_ts = msg.rx_ts; > return; > default: > @@ -1034,6 +1037,9 @@ void testProcessing(struct node *node, bool wallclock) > node->state.rc_state = NOPRESS; > } > } > + > + if (node->has_aud_rate) > + aud_rate_msg_interval_check(node, ts_now); > } > mode = CEC_MODE_INITIATOR; > doioctl(node, CEC_S_MODE, &mode); >
diff --git a/utils/cec-follower/cec-processing.cpp b/utils/cec-follower/cec-processing.cpp index 243c9d09..dd6fd05c 100644 --- a/utils/cec-follower/cec-processing.cpp +++ b/utils/cec-follower/cec-processing.cpp @@ -233,19 +233,22 @@ static __u8 current_power_state(struct node *node) return CEC_OP_POWER_STATUS_TO_STANDBY; } -static void aud_rate_msg_interval_check(__u64 ts_new, __u64 ts_old) +static void aud_rate_msg_interval_check(struct node *node, __u64 ts_new) { /* - * The interval between messages is not relevant if this is the - * first audio rate control message or if the previous message - * turned off the audio rate control. + * The interval since the last audio rate message is not relevant + * unless the Source is currently in audio rate controlled mode. */ + __u64 ts_old = node->state.last_aud_rate_rx_ts; + if (ts_old) { __u64 interval = ts_new - ts_old; if (interval > MAX_AUD_RATE_MSG_INTERVAL) { - warn("The interval between Audio Rate Control messages was greater\n"); + warn("The interval since the last Audio Rate Control message was greater\n"); warn("than the Maxiumum Audio Rate Message Interval (2s).\n"); + warn("Turning off audio rate control.\n"); + node->state.last_aud_rate_rx_ts = 0; } } } @@ -803,7 +806,7 @@ static void processMsg(struct node *node, struct cec_msg &msg, unsigned me) switch (msg.msg[2]) { case CEC_OP_AUD_RATE_OFF: - aud_rate_msg_interval_check(msg.rx_ts, node->state.last_aud_rate_rx_ts); + aud_rate_msg_interval_check(node, msg.rx_ts); node->state.last_aud_rate_rx_ts = 0; return; case CEC_OP_AUD_RATE_WIDE_STD: @@ -812,7 +815,7 @@ static void processMsg(struct node *node, struct cec_msg &msg, unsigned me) case CEC_OP_AUD_RATE_NARROW_STD: case CEC_OP_AUD_RATE_NARROW_FAST: case CEC_OP_AUD_RATE_NARROW_SLOW: - aud_rate_msg_interval_check(msg.rx_ts, node->state.last_aud_rate_rx_ts); + aud_rate_msg_interval_check(node, msg.rx_ts); node->state.last_aud_rate_rx_ts = msg.rx_ts; return; default: @@ -1034,6 +1037,9 @@ void testProcessing(struct node *node, bool wallclock) node->state.rc_state = NOPRESS; } } + + if (node->has_aud_rate) + aud_rate_msg_interval_check(node, ts_now); } mode = CEC_MODE_INITIATOR; doioctl(node, CEC_S_MODE, &mode);
If the controlling device simply stops sending audio rate messages, give the cec-follower the ability to detect that it has not received an audio rate message within 2 seconds as required. The cec-follower will quit the audio rate controlled mode. Eliminate the need to measure an interval between two audio rate messages. Signed-off-by: Deborah Brouwer <deborahbrouwer3563@gmail.com> --- utils/cec-follower/cec-processing.cpp | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-)