This adds a shared/bap helper to parse BASE. Any plugin that wishes to
parse a BASE structure can call this helper and provide a callback to
process each BIS.
---
src/shared/bap.c | 125 +++++++++++++++++++++++++++++++++++++++++++++++
src/shared/bap.h | 10 ++++
2 files changed, 135 insertions(+)
diff --git a/src/shared/bap.c b/src/shared/bap.c
index 658ee1370..167501282 100644
--- a/src/shared/bap.c
+++ b/src/shared/bap.c
@@ -7067,3 +7067,128 @@ void bt_bap_verify_bis(struct bt_bap *bap, uint8_t bis_index,
}
}
+
+bool bt_bap_parse_base(struct iovec *iov,
+ struct bt_bap_qos *qos,
+ util_debug_func_t func,
+ bt_bap_bis_func_t handler,
+ void *user_data)
+{
+ uint32_t delay;
+ uint8_t sgrps;
+ bool ret = true;
+
+ util_debug(func, NULL, "BASE len: %ld", iov->iov_len);
+
+ if (!util_iov_pull_le24(iov, &delay))
+ return false;
+
+ util_debug(func, NULL, "PresentationDelay: %d", delay);
+
+ if (!util_iov_pull_u8(iov, &sgrps))
+ return false;
+
+ util_debug(func, NULL, "Number of Subgroups: %d", sgrps);
+
+ /* Loop subgroups */
+ for (int idx = 0; idx < sgrps; idx++) {
+ uint8_t num_bis;
+ struct bt_bap_codec *codec;
+ struct iovec l2_cc;
+ uint8_t l2_cc_len;
+ struct iovec meta;
+ uint8_t meta_len;
+
+ util_debug(func, NULL, "Subgroup #%d", idx);
+
+ if (!util_iov_pull_u8(iov, &num_bis)) {
+ ret = false;
+ goto done;
+ }
+
+ util_debug(func, NULL, "Number of BISes: %d", num_bis);
+
+ codec = util_iov_pull_mem(iov, sizeof(*codec));
+
+ util_debug(func, NULL, "Codec: ID %d CID 0x%2.2x VID 0x%2.2x",
+ codec->id, codec->cid, codec->vid);
+
+ /* Level 2 */
+ /* Read Codec Specific Configuration */
+ if (!util_iov_pull_u8(iov, &l2_cc_len)) {
+ ret = false;
+ goto done;
+ }
+
+ l2_cc.iov_base = util_iov_pull_mem(iov, l2_cc_len);
+ l2_cc.iov_len = l2_cc_len;
+
+ /* Print Codec Specific Configuration */
+ util_debug(func, NULL, "CC len: %ld", l2_cc.iov_len);
+ bt_bap_debug_config(l2_cc.iov_base, l2_cc.iov_len,
+ func, NULL);
+
+ /* Read Metadata */
+ if (!util_iov_pull_u8(iov, &meta_len)) {
+ ret = false;
+ goto done;
+ }
+
+ meta.iov_base = util_iov_pull_mem(iov, meta_len);
+ meta.iov_len = meta_len;
+
+ /* Print Metadata */
+ util_debug(func, NULL, "Metadata len: %i",
+ (uint8_t)meta.iov_len);
+ bt_bap_debug_metadata(meta.iov_base, meta.iov_len,
+ func, NULL);
+
+ /* Level 3 */
+ for (; num_bis; num_bis--) {
+ uint8_t bis_index;
+ struct iovec l3_cc;
+ uint8_t l3_cc_len;
+ struct iovec *bis_cc;
+
+ if (!util_iov_pull_u8(iov, &bis_index)) {
+ ret = false;
+ goto done;
+ }
+
+ util_debug(func, NULL, "BIS #%d", bis_index);
+
+ /* Read Codec Specific Configuration */
+ if (!util_iov_pull_u8(iov, &l3_cc_len)) {
+ ret = false;
+ goto done;
+ }
+
+ l3_cc.iov_base = util_iov_pull_mem(iov,
+ l3_cc_len);
+ l3_cc.iov_len = l3_cc_len;
+
+ /* Print Codec Specific Configuration */
+ util_debug(func, NULL, "CC Len: %d",
+ (uint8_t)l3_cc.iov_len);
+
+ bt_bap_debug_config(l3_cc.iov_base,
+ l3_cc.iov_len,
+ func, NULL);
+
+ bis_cc = bt_bap_merge_caps(&l2_cc, &l3_cc);
+ if (!bis_cc)
+ continue;
+
+ handler(bis_index, idx, bis_cc, &meta,
+ qos, user_data);
+
+ util_iov_free(bis_cc, 1);
+ }
+ }
+
+done:
+ if (!ret)
+ util_debug(func, NULL, "Unable to parse Base");
+
+ return ret;
+}
diff --git a/src/shared/bap.h b/src/shared/bap.h
index 126348e81..200dc8f13 100644
--- a/src/shared/bap.h
+++ b/src/shared/bap.h
@@ -40,6 +40,10 @@ typedef void (*bt_bap_stream_func_t)(struct bt_bap_stream *stream,
void *user_data);
typedef void (*bt_bap_func_t)(struct bt_bap *bap, void *user_data);
+typedef void (*bt_bap_bis_func_t)(uint8_t bis, uint8_t sgrp,
+ struct iovec *caps, struct iovec *meta,
+ struct bt_bap_qos *qos, void *user_data);
+
/* Local PAC related functions */
struct bt_bap_pac_qos {
uint8_t framing;
@@ -259,3 +263,9 @@ void bt_bap_verify_bis(struct bt_bap *bap, uint8_t bis_index,
struct iovec *caps,
struct bt_bap_pac **lpac);
+bool bt_bap_parse_base(struct iovec *base,
+ struct bt_bap_qos *qos,
+ util_debug_func_t func,
+ bt_bap_bis_func_t handler,
+ void *user_data);
+
--
2.43.0
