Hi Jiunn,
This is a lot better. Just a few more comments:
On 9/19/19 7:47 PM, Jiunn Chang wrote:
> Implement the following tuner control features:
> - <Select Analogue Service>
> - <Give Tuner Device Status> and reply <Tuner Device Status>
>
> Signed-off-by: Jiunn Chang <c0d1n61...@gmail.com>
> ---
>
> Changes made since v1:
> - Fix typos/bugs
> - Import reply_feature_abort() from cec-processing.cpp
> - Add functionality to choose nearest frequency
>
> Changes made since v2:
> - Fix typos/bugs
> - Use state from node in cec-follower.h
> - Rename functions to analog_ prefix
>
> Changes made since v3:
> - Refactor lines numbers since a fix patch was needed for cec-tuner.cpp
>
> Changes made since v4:
> - Remove int casting in abs()
> - Add temp variables: info, freq to make code easier to read
> - Use NUM_ANALOG_FREQS macro
>
> ---
> utils/cec-follower/cec-follower.h | 1 +
> utils/cec-follower/cec-tuner.cpp | 62 +++++++++++++++++++++++++------
> 2 files changed, 51 insertions(+), 12 deletions(-)
>
> diff --git a/utils/cec-follower/cec-follower.h
> b/utils/cec-follower/cec-follower.h
> index 03b52217..91b9e037 100644
> --- a/utils/cec-follower/cec-follower.h
> +++ b/utils/cec-follower/cec-follower.h
> @@ -51,6 +51,7 @@ struct state {
> __u64 rc_press_rx_ts;
> unsigned rc_press_hold_count;
> unsigned rc_duration_sum;
> + struct cec_op_tuner_device_info tuner_dev_info;
> };
>
> struct node {
> diff --git a/utils/cec-follower/cec-tuner.cpp
> b/utils/cec-follower/cec-tuner.cpp
> index bdeda342..87425083 100644
> --- a/utils/cec-follower/cec-tuner.cpp
> +++ b/utils/cec-follower/cec-tuner.cpp
> @@ -4,6 +4,7 @@
> */
>
> #include <sys/ioctl.h>
> +#include <stdlib.h>
>
> #include "cec-follower.h"
>
> @@ -89,6 +90,40 @@ static unsigned int
> analog_freqs_khz[3][9][NUM_ANALOG_FREQS] =
> }
> };
>
> +static void analog_set_tuner_chan_freq(struct node *node)
> +{
> + struct cec_op_tuner_device_info *info = &node->state.tuner_dev_info;
> + int ana_freq_khz = (info->analog.ana_freq * 625) / 10;
> + int nearest =
> analog_freqs_khz[info->analog.ana_bcast_type][info->analog.bcast_system][0];
> +
> + for (int i = 0; i < NUM_ANALOG_FREQS; i++) {
> + int freq =
> analog_freqs_khz[info->analog.ana_bcast_type][info->analog.bcast_system][i];
> +
> + if (abs(ana_freq_khz - freq) < abs(ana_freq_khz - nearest)) {
> + nearest = freq;
> + }
You can drop the { } as per the kernel coding style.
> + }
> + info->analog.ana_freq = (nearest * 10) / 625;
> +}
> +
> +static bool analog_set_tuner_dev_info(struct node *node, struct cec_msg *msg)
> +{
> + struct cec_op_tuner_device_info *info = &node->state.tuner_dev_info;
> +
> + info->rec_flag = CEC_OP_REC_FLAG_NOT_USED;
> + info->tuner_display_info = CEC_OP_TUNER_DISPLAY_INFO_ANALOGUE;
> + info->is_analog = true;
> + cec_ops_select_analogue_service(msg,
> + &info->analog.ana_bcast_type,
> + &info->analog.ana_freq,
> + &info->analog.bcast_system);
> + if (info->analog.ana_bcast_type > 2 ||
> + info->analog.bcast_system > 8)
> + return false;
cec_ops_select_analogue_service should store the results in temp variables first
and this function should only change node->state.tuner_dev_info if the test
above
succeeds. Otherwise you would change the internal state to invalid values.
I also think that analog_set_tuner_chan_freq() shouldn't set
info->analog.ana_freq.
That really should happen in this function as that keeps the code that updates
node->state.tuner_dev_info in a single place. Instead that function should just
find the nearest valid frequency, so the prototype becomes something like this:
static unsigned int analog_get_nearest_freq(__u8 ana_bcast_type, __u8
ana_bcast_system,
int ana_freq_khz);
This will be needed for e.g. timer/record support as well.
> + analog_set_tuner_chan_freq(node);
> + return true;
> +}
> +
> void process_tuner_record_timer_msgs(struct node *node, struct cec_msg &msg,
> unsigned me)
> {
> bool is_bcast = cec_msg_is_broadcast(&msg);
> @@ -105,21 +140,11 @@ void process_tuner_record_timer_msgs(struct node *node,
> struct cec_msg &msg, uns
> */
>
> case CEC_MSG_GIVE_TUNER_DEVICE_STATUS: {
> - if (!cec_has_tuner(1 << me))
> + if (!cec_has_tuner(1 << me) && !cec_has_tv(1 << me))
> break;
>
> - struct cec_op_tuner_device_info tuner_dev_info = {};
> -
> cec_msg_set_reply_to(&msg, &msg);
> - tuner_dev_info.rec_flag = CEC_OP_REC_FLAG_NOT_USED;
> - tuner_dev_info.tuner_display_info =
> CEC_OP_TUNER_DISPLAY_INFO_NONE;
> - tuner_dev_info.is_analog = false;
> - tuner_dev_info.digital.service_id_method =
> CEC_OP_SERVICE_ID_METHOD_BY_CHANNEL;
> - tuner_dev_info.digital.dig_bcast_system =
> CEC_OP_DIG_SERVICE_BCAST_SYSTEM_DVB_C;
> - tuner_dev_info.digital.channel.channel_number_fmt =
> CEC_OP_CHANNEL_NUMBER_FMT_1_PART;
> - tuner_dev_info.digital.channel.minor = 1;
> -
> - cec_msg_tuner_device_status(&msg, &tuner_dev_info);
> + cec_msg_tuner_device_status(&msg, &node->state.tuner_dev_info);
> transmit(node, &msg);
> return;
> }
> @@ -128,6 +153,19 @@ void process_tuner_record_timer_msgs(struct node *node,
> struct cec_msg &msg, uns
> return;
>
> case CEC_MSG_SELECT_ANALOGUE_SERVICE:
> + if (!cec_has_tuner(1 << me) && !cec_has_tv(1 << me))
> + break;
> +
> + if (node->state.tuner_dev_info.rec_flag ==
> CEC_OP_REC_FLAG_USED) {
> + reply_feature_abort(node, &msg, CEC_OP_ABORT_REFUSED);
> + return;
> + }
> + if (!analog_set_tuner_dev_info(node, &msg)) {
> + reply_feature_abort(node, &msg,
> CEC_OP_ABORT_INVALID_OP);
> + return;
> + }
> + return;
> +
> case CEC_MSG_SELECT_DIGITAL_SERVICE:
> case CEC_MSG_TUNER_STEP_DECREMENT:
> case CEC_MSG_TUNER_STEP_INCREMENT:
>
I think there is one more thing to do here: state_init() in cec-follower.cpp
should
initialize node->state.tuner_dev_info with sane initial values.
It is probably best to have it call a analog_tuner_init() function in
cec-tuner.cpp
since it will need to access the analog_freqs_khz table.
Regards,
Hans
