Signed-off-by: Konke Radlow <korad...@gmail.com>
libv4l2rds: added support to decode RDS-EON information
Signed-off-by: Konke Radlow <korad...@gmail.com>
libv4l2rds: added support to decode RDS-TMC tuning information
Signed-off-by: Konke Radlow <korad...@gmail.com>
libv4l2rds.c: fixing compiler warnings due to missing pointer dereferencing
and implementing changes proposed in RFC replies (RDS-EON patch)
Signed-off-by: Konke Radlow <korad...@gmail.com>
libv4l2rds: implementing changes proposed in RFC replies (TMC-Tuning patch)
Signed-off-by: Konke Radlow <korad...@gmail.com>
---
lib/include/libv4l2rds.h | 79 +++++++++-
lib/libv4l2rds/libv4l2rds.c | 363 ++++++++++++++++++++++++++++++++++++++++---
2 files changed, 417 insertions(+), 25 deletions(-)
diff --git a/lib/include/libv4l2rds.h b/lib/include/libv4l2rds.h
index 6a6c7f3..e1078de 100644
--- a/lib/include/libv4l2rds.h
+++ b/lib/include/libv4l2rds.h
@@ -37,7 +37,7 @@ extern "C" {
#endif
/* used to define the current version (version field) of the v4l2_rds struct */
-#define V4L2_RDS_VERSION (1)
+#define V4L2_RDS_VERSION (2)
/* Constants used to define the size of arrays used to store RDS information */
#define MAX_ODA_CNT 18 /* there are 16 groups each with type a or b.
Of these
@@ -50,6 +50,16 @@ extern "C" {
* Additional data is limited to 112 bit, and the
smallest
* optional tuple has a size of 4 bit (4 bit identifier +
* 0 bits of data) */
+#define MAX_TMC_ALT_STATIONS 32 /* defined by ISO 14819-1:2003, 7.5.3.3 */
+#define MAX_TMC_AF_CNT 4 /* limit for the numbers of AFs stored per
alternative TMC
+ * station. This value is not defined by the standard,
but based on observation
+ * of real-world RDS-TMC streams. The maximum
encountered number of AFs per
+ * station during testing was 2 */
+#define MAX_EON_CNT 20 /* Maximal number of entries in the EON table (for
storing
+ * information about other radio stations, broadcasted
by the current station).
+ * This value is not defined by the standard, but based
on observation
+ * of real-world RDS-TMC streams. EON doesn't seem to be
a widely used feature
+ * and the maximum number of EON encountered during
testing was 8 */
/* Define Constants for the possible types of RDS information
* used to address the relevant bit in the valid_fields bitmask */
@@ -69,7 +79,10 @@ extern "C" {
#define V4L2_RDS_LC 0x2000 /* Language Code */
#define V4L2_RDS_TMC_SG 0x4000 /* RDS-TMC single group */
#define V4L2_RDS_TMC_MG 0x8000 /* RDS-TMC multi group */
-#define V4L2_RDS_TMC_SYS 0x10000 /* RDS-TMC system information */
+#define V4L2_RDS_TMC_SYS 0x10000 /* RDS-TMC system information */
+#define V4L2_RDS_EON 0x20000 /* Enhanced Other Network Info */
+#define V4L2_RDS_LSF 0x40000 /* Linkage information */
+#define V4L2_RDS_TMC_TUNING 0x80000 /* RDS-TMC tuning information */
/* Define Constants for the state of the RDS decoding process
* used to address the relevant bit in the decode_information bitmask */
@@ -84,9 +97,10 @@ extern "C" {
#define V4L2_RDS_FLAG_STATIC_PTY 0x08
/* TMC related codes
- * used to extract TMC fields from RDS groups */
-#define V4L2_TMC_TUNING_INFO 0x08
-#define V4L2_TMC_SINGLE_GROUP 0x04
+ * used to extract TMC fields from RDS-TMC groups
+ * see ISO 14819-1:2003, Figure 2 - RDS-TMC single-grp full message structure
*/
+#define V4L2_TMC_TUNING_INFO 0x10 /* Bit 4 indicates Tuning Info / User
msg */
+#define V4L2_TMC_SINGLE_GROUP 0x08 /* Bit 3 indicates Single / Multi-group
msg */
/* struct to encapsulate one complete RDS group */
/* This structure is used internally to store data until a complete RDS
@@ -149,6 +163,57 @@ struct v4l2_rds_af_set {
uint32_t af[MAX_AF_CNT]; /* AFs defined in Hz */
};
+/* struct to encapsulate one entry in the EON table (Enhanced Other Network) */
+struct v4l2_rds_eon {
+ uint32_t valid_fields;
+ uint16_t pi;
+ uint8_t ps[9];
+ uint8_t pty;
+ bool ta;
+ bool tp;
+ uint16_t lsf; /* Linkage Set Number */
+ struct v4l2_rds_af_set af;
+};
+
+/* struct to encapsulate a table of EON information */
+struct v4l2_rds_eon_set {
+ uint8_t size; /* size of the table */
+ uint8_t index; /* current position in the table */
+ struct v4l2_rds_eon eon[MAX_EON_CNT]; /* Information about other
+ * radio channels */
+};
+
+/* struct to encapsulate alternative frequencies (AFs) for RDS-TMC stations.
+ * AFs listed in af[] can be used unconditionally.
+ * AFs listed in mapped_af[n] should only be used if the current
+ * tuner frequency matches the value in mapped_af_tuning[n] */
+struct v4l2_tmc_alt_freq {
+ uint8_t af_size; /* number of known AFs */
+ uint8_t af_index;
+ uint8_t mapped_af_size; /* number of mapped AFs */
+ uint8_t mapped_af_index;
+ uint32_t af[MAX_TMC_AF_CNT]; /* AFs defined in Hz */
+ uint32_t mapped_af[MAX_TMC_AF_CNT]; /* mapped AFs defined
in Hz */
+ uint32_t mapped_af_tuning[MAX_TMC_AF_CNT]; /* mapped AFs defined
in Hz */
+};
+
+/* struct to encapsulate information about stations carrying RDS-TMC services
*/
+struct v4l2_tmc_station {
+ uint16_t pi;
+ uint8_t ltn; /* database-ID of ON */
+ uint8_t msg; /* msg parameters of ON */
+ uint8_t sid; /* service-ID of ON */
+ struct v4l2_tmc_alt_freq afi;
+};
+
+/* struct to encapsulate tuning information for TMC */
+struct v4l2_tmc_tuning {
+ uint8_t station_cnt; /* number of announced alternative stations */
+ uint8_t index;
+ struct v4l2_tmc_station station[MAX_TMC_ALT_STATIONS]; /* information
+ * about other stations
carrying the same RDS-TMC service */
+};
+
/* struct to encapsulate an additional data field in a TMC message */
struct v4l2_tmc_additional {
uint8_t label;
@@ -199,6 +264,9 @@ struct v4l2_rds_tmc {
uint8_t t_d; /* delay time (only if mode = enhanced */
uint8_t spn[9]; /* service provider name */
struct v4l2_rds_tmc_msg tmc_msg;
+
+ /* tuning information for alternative service providers */
+ struct v4l2_tmc_tuning tuning;
};
/* struct to encapsulate state and RDS information for current decoding
process */
@@ -236,6 +304,7 @@ struct v4l2_rds {
struct v4l2_rds_statistics rds_statistics;
struct v4l2_rds_oda_set rds_oda; /* Open Data Services */
struct v4l2_rds_af_set rds_af; /* Alternative Frequencies */
+ struct v4l2_rds_eon_set rds_eon; /* EON information */
struct v4l2_rds_tmc tmc; /* TMC information */
};
diff --git a/lib/libv4l2rds/libv4l2rds.c b/lib/libv4l2rds/libv4l2rds.c
index 2918061..28b78ce 100644
--- a/lib/libv4l2rds/libv4l2rds.c
+++ b/lib/libv4l2rds/libv4l2rds.c
@@ -92,6 +92,11 @@ enum rds_state {
RDS_C_RECEIVED,
};
+/* function declarations to prevent the need to move large code blocks */
+static int rds_add_tmc_station(struct rds_private_state *priv_state, uint16_t
pi);
+static uint32_t rds_decode_af(uint8_t af, bool is_vhf);
+static bool rds_add_tmc_af(struct rds_private_state *priv_state);
+
static inline uint8_t set_bit(uint8_t input, uint8_t bitmask, bool bitvalue)
{
return bitvalue ? input | bitmask : input & ~bitmask;
@@ -368,7 +373,7 @@ static uint32_t rds_decode_tmc_multi_group(struct
rds_private_state *priv_state)
/* bit 15 of block 3 is the first group indicator */
if (grp->data_c_msb & 0x80) {
/* begine decoding of new message */
- memset(msg, 0, sizeof(msg));
+ memset(msg, 0, sizeof(*msg));
memset(priv_state->optional_tmc, 0, 112*sizeof(bool));
/* bits 0-3 of block 2 contain continuity index */
priv_state->continuity_id = grp->data_b_lsb & 0x07;
@@ -434,6 +439,60 @@ static uint32_t rds_decode_tmc_multi_group(struct
rds_private_state *priv_state)
return V4L2_RDS_TMC_MG;
}
+/* decode the RDS-TMC tuning information that is contained in type 8A groups
+ * (variants 4 to 9) that announce the presence alternative transmitters
+ * providing the same RDS-TMC service */
+static uint32_t rds_decode_tmc_tuning(struct rds_private_state *priv_state)
+{
+ struct v4l2_rds_group *group = &priv_state->rds_group;
+ struct v4l2_rds_tmc *tmc = &priv_state->handle.tmc;
+ uint8_t variant_code = group->data_b_lsb & 0x0f;
+ uint16_t pi_on = (group->data_d_msb << 8) | group->data_d_lsb;
+ uint8_t index;
+
+ /* variants 4 and 5 carry the service provider name */
+ if (variant_code >= 4 && variant_code <= 5) {
+ int offset = 4 * (variant_code - 4);
+ tmc->spn[0 + offset] = group->data_c_msb;
+ tmc->spn[1 + offset] = group->data_c_lsb;
+ tmc->spn[2 + offset] = group->data_d_msb;
+ tmc->spn[3 + offset] = group->data_d_lsb;
+
+ /* variant 6 provides specific frequencies for the same RDS-TMC service
+ * on a network with a different PI code */
+ /* variant 7 provides mapped frequency pair information which should
only
+ * be used if the terminal is tuned to the tuning frequency */
+ } else if (variant_code == 6 || variant_code == 7) {
+ rds_add_tmc_af(priv_state);
+
+ /* variant 8 indicates up to 2 PI codes of adjacent networks carrying
+ * the same RDS-TMC service on all transmitters of the network */
+ } else if (variant_code == 8) {
+ uint16_t pi_on_2 = (group->data_c_msb << 8) | group->data_c_lsb;
+
+ /* try to add both transmitted PI codes to the table */
+ rds_add_tmc_station(priv_state, pi_on);
+ /* PI = 0 is used as a filler code */
+ if (pi_on_2 != 0)
+ rds_add_tmc_station(priv_state, pi_on_2);
+
+ /* variant 9 provides PI codes of other networks with different system
+ * parameters */
+ } else if (variant_code == 9) {
+ index = rds_add_tmc_station(priv_state, pi_on);
+
+ /* bits 0 - 5 contain the service-ID of the ON */
+ tmc->tuning.station[index].sid = group->data_c_lsb & 0x3F;
+ /* bits 6-10 contain the msg parameters of the ON */
+ tmc->tuning.station[index].msg = (group->data_c_msb & 0x03) <<
2;
+ tmc->tuning.station[index].msg |= (group->data_c_lsb >> 6) &
0x03;
+ /* bits 11-15 contain the database-ID of the ON */
+ tmc->tuning.station[index].ltn = group->data_c_msb >> 2;
+ }
+
+ return V4L2_RDS_TMC_TUNING;
+}
+
static bool rds_add_oda(struct rds_private_state *priv_state, struct
v4l2_rds_oda oda)
{
struct v4l2_rds *handle = &priv_state->handle;
@@ -455,20 +514,11 @@ static bool rds_add_oda(struct rds_private_state
*priv_state, struct v4l2_rds_od
/* add a new AF to the list, if it doesn't exist yet */
static bool rds_add_af_to_list(struct v4l2_rds_af_set *af_set, uint8_t af,
bool is_vhf)
{
- uint32_t freq = 0;
-
- /* AF0 -> "Not to be used" */
- if (af == 0)
+ /* convert the frequency to Hz, skip on errors */
+ uint32_t freq = rds_decode_af(af, is_vhf);
+ if (freq == 0)
return false;
- /* calculate the AF values in HZ */
- if (is_vhf)
- freq = 87500000 + af * 100000;
- else if (freq <= 15)
- freq = 152000 + af * 9000;
- else
- freq = 531000 + af * 9000;
-
/* prevent buffer overflows */
if (af_set->size >= MAX_AF_CNT || af_set->size >= af_set->announced_af)
return false;
@@ -505,7 +555,7 @@ static bool rds_add_af(struct rds_private_state *priv_state)
updated_af = true;
c_lsb = 0; /* invalidate */
}
- /* 224..249: announcement of AF count (224=0, 249=25)*/
+ /* 224..249: announcement of AF count (224=0, 249=25) */
if (c_msb >= 224 && c_msb <= 249)
af_set->announced_af = c_msb - 224;
/* check if the data represents an AF (for 1 =< val <= 204 the
@@ -522,6 +572,103 @@ static bool rds_add_af(struct rds_private_state
*priv_state)
return updated_af;
}
+/* checks if an entry for the given PI already exists and returns the index
+ * of that entry if so. Else it adds a new entry to the TMC-Tuning table and
returns
+ * the index of the new field */
+static int rds_add_tmc_station(struct rds_private_state *priv_state, uint16_t
pi)
+{
+ struct v4l2_tmc_tuning *tuning = &priv_state->handle.tmc.tuning;
+ uint8_t index = tuning->index;
+ uint8_t size = tuning->station_cnt;
+
+ /* check if there's an entry for the given PI key */
+ for (int i = 0; i < tuning->station_cnt; i++) {
+ if (tuning->station[i].pi == pi) {
+ return i;
+ }
+ }
+ /* if the the maximum table size is reached, overwrite old
+ * entries, starting at the oldest one = 0 */
+ tuning->station[index].pi = pi;
+ tuning->index = (index+1 < MAX_TMC_ALT_STATIONS) ? (index+1) : 0;
+ tuning->station_cnt = (size+1 <= MAX_TMC_ALT_STATIONS) ? (size+1) :
MAX_TMC_ALT_STATIONS;
+ return index;
+}
+
+/* tries to add new AFs to the relevant entry in the list of RDS-TMC providers
*/
+static bool rds_add_tmc_af(struct rds_private_state *priv_state)
+{
+ struct v4l2_rds_group *grp = &priv_state->rds_group;
+ struct v4l2_tmc_alt_freq *afi;
+ uint16_t pi_on = grp->data_d_msb << 8 | grp->data_d_lsb;
+ uint8_t variant = grp->data_b_lsb & 0x0f;
+ uint8_t station_index = rds_add_tmc_station(priv_state, pi_on);
+ uint8_t af_index;
+ uint8_t mapped_af_index;
+ uint32_t freq_a = rds_decode_af(grp->data_c_msb, true);
+ uint32_t freq_b = rds_decode_af(grp->data_c_lsb, true);
+
+ afi = &priv_state->handle.tmc.tuning.station[station_index].afi;
+ af_index = afi->af_index;
+ mapped_af_index = afi->mapped_af_index;
+
+ /* specific frequencies */
+ if (variant == 6) {
+ /* compare the new AFs to the stored ones, reset them to 0 if
the AFs are
+ * already known */
+ for (int i = 0; i < afi->af_size; i++) {
+ freq_a = (freq_a == afi->af[i]) ? 0 : freq_a;
+ freq_b = (freq_b == afi->af[i]) ? 0 : freq_b;
+ }
+ /* return early if there is nothing to do */
+ if (freq_a == 0 && freq_b == 0)
+ return false;
+
+ /* add the new AFs if they were previously unknown */
+ if (freq_a != 0) {
+ afi->af[af_index] = freq_a;
+ af_index = (af_index+1 < MAX_TMC_AF_CNT) ? af_index+1 :
0;
+ afi->af_size++;
+ }
+ if (freq_b != 0) {
+ afi->af[af_index] = freq_b;
+ af_index = (af_index+1 < MAX_TMC_AF_CNT) ? af_index+1 :
0;
+ afi->af_size++;
+ }
+ /* update the information in the handle */
+ afi->af_index = af_index;
+ if (afi->af_size >= MAX_TMC_AF_CNT)
+ afi->af_size = MAX_TMC_AF_CNT;
+
+ return true;
+ }
+
+ /* mapped frequency pair */
+ else if (variant == 7) {
+ /* check the if there's already a frequency mapped to the new
tuning
+ * frequency, update the mapped frequency in this case */
+ for (int i = 0; i < afi->mapped_af_size; i++) {
+ if (freq_a == afi->mapped_af_tuning[i])
+ afi->mapped_af[i] = freq_b;
+ return true;
+ }
+ /* new pair is unknown, add it to the list */
+ if (freq_a != 0 && freq_b != 0) {
+ mapped_af_index = (mapped_af_index+1 >= MAX_TMC_AF_CNT)
? 0 : mapped_af_index + 1;
+ afi->mapped_af[mapped_af_index] = freq_b;
+ afi->mapped_af_tuning[mapped_af_index] = freq_a;
+ afi->mapped_af_size++;
+ }
+ /* update the information in the handle */
+ afi->mapped_af_index = mapped_af_index;
+ if (afi->mapped_af_size >= MAX_TMC_AF_CNT)
+ afi->mapped_af_size = MAX_TMC_AF_CNT;
+
+ return true;
+ }
+ return false;
+}
+
/* adds one char of the ps name to temporal storage, the value is validated
* if it is received twice in a row
* @pos: position of the char within the PS name (0..7)
@@ -543,6 +690,44 @@ static bool rds_add_ps(struct rds_private_state
*priv_state, uint8_t pos, uint8_
return true;
}
+/* checks if an entry for the given PI already exists and returns the index
+ * of that entry if so. Else it adds a new entry to the EON table and returns
+ * the index of the new field */
+static uint8_t rds_add_eon_entry(struct rds_private_state *priv_state,
uint16_t pi)
+{
+ struct v4l2_rds *handle = &priv_state->handle;
+ uint8_t index = handle->rds_eon.index;
+ uint8_t size = handle->rds_eon.size;
+
+ /* check if there's an entry for the given PI key */
+ for (int i = 0; i < handle->rds_eon.size; i++) {
+ if (handle->rds_eon.eon[i].pi == pi) {
+ return i;
+ }
+ }
+ /* if the the maximum table size is reached, overwrite old
+ * entries, starting at the oldest one = 0 */
+ handle->rds_eon.eon[index].pi = pi;
+ handle->rds_eon.eon[index].valid_fields |= V4L2_RDS_PI;
+ handle->rds_eon.index = (index+1 < MAX_EON_CNT) ? (index+1) : 0;
+ handle->rds_eon.size = (size+1 <= MAX_EON_CNT) ? (size+1) : MAX_EON_CNT;
+ return index;
+}
+
+/* checks if an entry for the given PI already exists */
+static bool rds_check_eon_entry(struct rds_private_state *priv_state, uint16_t
pi)
+{
+ struct v4l2_rds *handle = &priv_state->handle;
+
+ /* check if there's an entry for the given PI key */
+ for (int i = 0; i <= handle->rds_eon.size; i++) {
+ if (handle->rds_eon.eon[i].pi == pi) {
+ return true;
+ }
+ }
+ return false;
+}
+
/* group of functions to decode successfully received RDS groups into
* easily accessible data fields
*
@@ -790,6 +975,29 @@ static uint32_t rds_decode_group3(struct rds_private_state
*priv_state)
return updated_fields;
}
+/* decodes the RDS radio frequency representation into Hz
+ * @af: 8-bit AF value as transmitted in RDS groups
+ * @is_vhf: boolean value defining which conversion table to use
+ * @return: frequency in Hz, 0 in case of wrong input values */
+static uint32_t rds_decode_af(uint8_t af, bool is_vhf) {
+ uint32_t freq = 0;
+
+ /* AF = 0 => "not to be used"
+ * AF >= 205 => special meanings */
+ if (af == 0 || af >= 205)
+ return 0;
+
+ /* calculate the AF values in HZ */
+ if (is_vhf)
+ freq = 87500000 + af * 100000;
+ else if (freq <= 15)
+ freq = 152000 + af * 9000;
+ else
+ freq = 531000 + af * 9000;
+
+ return freq;
+}
+
/* decodes the RDS date/time representation into a standard c representation
* that can be used with c-library functions */
static time_t rds_decode_mjd(const struct rds_private_state *priv_state)
@@ -880,7 +1088,6 @@ static uint32_t rds_decode_group4(struct rds_private_state
*priv_state)
handle->time = rds_decode_mjd(priv_state);
updated_fields |= V4L2_RDS_TIME;
handle->valid_fields |= V4L2_RDS_TIME;
- printf("\nLIB: time_t: %ld", handle->time);
return updated_fields;
}
@@ -916,13 +1123,13 @@ static uint32_t rds_decode_group8(struct
rds_private_state *priv_state)
!(grp->data_b_lsb & V4L2_TMC_TUNING_INFO)) {
return rds_decode_tmc_multi_group(priv_state);
}
- /* -> tuning information message, defined for variants 4..9, submitted
- * in bits 0-3 of block 2 */
+ /* -> tuning information message, defined for variants 4..9,
+ * submitted in bits 0-3 of block 2 */
tuning_variant = grp->data_b_lsb & 0x0f;
if ((grp->data_b_lsb & V4L2_TMC_TUNING_INFO) && tuning_variant >= 4 &&
tuning_variant <= 9) {
- /* TODO: Implement tuning information decoding */
- return 0;
+ priv_state->handle.valid_fields |= V4L2_RDS_TMC_TUNING;
+ return rds_decode_tmc_tuning(priv_state);
}
return 0;
@@ -981,6 +1188,121 @@ static uint32_t rds_decode_group10(struct
rds_private_state *priv_state)
return updated_fields;
}
+/* group 14: EON (Enhanced Other Network) information */
+static uint32_t rds_decode_group14(struct rds_private_state* priv_state)
+{
+ struct v4l2_rds *handle = &priv_state->handle;
+ struct v4l2_rds_group *grp = &priv_state->rds_group;
+ struct v4l2_rds_eon *eon_entry;
+ uint32_t updated_fields = 0;
+ uint16_t pi_on;
+ uint16_t lsf_on;
+ uint8_t variant_code;
+ uint8_t eon_index;
+ uint8_t pty_on;
+ bool tp_on, ta_on;
+ bool new_a = false, new_b = false;
+
+ if (grp->group_version != 'A')
+ return 0;
+
+ /* bits 0-3 of group b contain the variant code */
+ variant_code = grp->data_b_lsb & 0x0f;
+
+ /* group d contains the PI code of the ON (Other Network) */
+ pi_on = (grp->data_d_msb << 8) | grp->data_d_lsb;
+
+ /* bit 4 of group b contains the TP status of the ON*/
+ tp_on = grp->data_b_lsb & 0x10;
+ if (rds_check_eon_entry(priv_state, pi_on)) {
+ /* if there's an entry for this PI(ON) update the TP field */
+ eon_index = rds_add_eon_entry(priv_state, pi_on);
+ eon_entry = &handle->rds_eon.eon[eon_index];
+ eon_entry->tp = tp_on;
+ eon_entry->valid_fields |= V4L2_RDS_TP;
+ updated_fields |= V4L2_RDS_EON;
+ }
+
+ /* perform group variant dependent decoding */
+ if ((variant_code >=5 && variant_code <= 11) || variant_code >= 14) {
+ /* 5-9 = mapped FM frequencies -> unsupported
+ * 10-11 = unallocated
+ * 14 = PIN(ON) -> unsupported (unused RDS feature)
+ * 15 = reserved for broadcasters use */
+ return updated_fields;
+ }
+
+ /* retrieve the EON entry corresponding to the PI(ON) code or add a new
+ * entry to the table if no entry exists */
+ eon_index = rds_add_eon_entry(priv_state, pi_on);
+ eon_entry = &handle->rds_eon.eon[eon_index];
+
+ /* PS Name */
+ if (variant_code < 4) {
+ eon_entry->ps[variant_code*2] = grp->data_c_msb;
+ eon_entry->ps[variant_code*2+1] = grp->data_c_lsb;
+ eon_entry->valid_fields |= V4L2_RDS_PS;
+ updated_fields |= V4L2_RDS_EON;
+ }
+ /* Alternative frequencies */
+ else if (variant_code == 4) {
+ uint8_t c_msb = grp->data_c_msb;
+ uint8_t c_lsb = grp->data_c_lsb;
+
+ /* 224..249: announcement of AF count (224=0, 249=25) */
+ if (c_msb >= 224 && c_msb <= 249)
+ eon_entry->af.announced_af = c_msb - 224;
+ /* check if the data represents an AF (for 1 =< val <= 204 the
+ * value represents an AF) */
+ if (c_msb < 205)
+ new_a = rds_add_af_to_list(&eon_entry->af,
+ grp->data_c_msb, true);
+ if (c_lsb < 205)
+ new_b = rds_add_af_to_list(&eon_entry->af,
+ grp->data_c_lsb, true);
+ /* check if one of the frequencies was previously unknown */
+ if (new_a || new_b) {
+ eon_entry->valid_fields |= V4L2_RDS_AF;
+ updated_fields |= V4L2_RDS_EON;
+ }
+ }
+ /* Linkage information */
+ else if (variant_code == 12) {
+ /* group c contains the lsf code */
+ lsf_on = (grp->data_c_msb << 8) | grp->data_c_lsb;
+ /* check if the lsf code is already known */
+ new_a = (eon_entry->lsf == lsf_on);
+ if (new_a) {
+ eon_entry->lsf = lsf_on;
+ eon_entry->valid_fields |= V4L2_RDS_LSF;
+ updated_fields |= V4L2_RDS_EON;
+ }
+ }
+ /* PTY(ON) and TA(ON) */
+ else if (variant_code == 13) {
+ /* bits 15-10 of group c contain the PTY(ON) */
+ pty_on = grp->data_c_msb >> 3;
+ /* bit 0 of group c contains the TA code */
+ ta_on = grp->data_c_lsb & 0x01;
+ /* check if the data is new */
+ new_a = (eon_entry->pty == pty_on);
+ if (new_a) {
+ eon_entry->pty = pty_on;
+ eon_entry->valid_fields |= V4L2_RDS_PTY;
+ }
+ new_b = (eon_entry->ta == ta_on);
+ eon_entry->ta = ta_on;
+ eon_entry->valid_fields |= V4L2_RDS_TA;
+ if (new_a || new_b)
+ updated_fields |= V4L2_RDS_EON;
+ }
+ /* set valid field for EON data, if EON table contains entries */
+ if (handle->rds_eon.size > 0)
+ handle->valid_fields |= V4L2_RDS_EON;
+
+ return updated_fields;
+}
+
typedef uint32_t (*decode_group_func)(struct rds_private_state *);
/* array of function pointers to contain all group specific decoding functions
*/
@@ -992,6 +1314,7 @@ static const decode_group_func decode_group[16] = {
[4] = rds_decode_group4,
[8] = rds_decode_group8,
[10] = rds_decode_group10,
+ [14] = rds_decode_group14
};
static uint32_t rds_decode_group(struct rds_private_state *priv_state)
@@ -1068,7 +1391,7 @@ uint32_t v4l2_rds_add(struct v4l2_rds *handle, struct
v4l2_rds_data *rds_data)
if (block_id == 0) {
*decode_state = RDS_A_RECEIVED;
/* begin reception of a new data group, reset raw
buffer to 0 */
- memset(rds_data_raw, 0, sizeof(rds_data_raw));
+ memset(rds_data_raw, 0, sizeof(*rds_data_raw));
rds_data_raw[0] = *rds_data;
} else {
/* ignore block if it is not the first block of a group
*/
--
1.7.10.4
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