Bluetooth: Iso: Add BT_ISO_SDU_BUF_SIZE macro
Add the BT_ISO_SDU_BUF_SIZE which can be used to declare the TX buffers for ISO, similar to the BT_L2CAP_SDU_BUF_SIZE macro for L2CAP. This also updates the ISO samples to use this as well updating the SDU check to use CONFIG_BT_ISO_TX_MTU/CONFIG_BT_ISO_RX_MTU without subtracting the BT_ISO_CHAN_SEND_RESERVE to make the API more clear. Signed-off-by: Emil Gydesen <emil.gydesen@nordicsemi.no>
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c5634f1b08
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10 changed files with 47 additions and 28 deletions
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@ -68,6 +68,11 @@ struct bt_buf_data {
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/** Helper to calculate needed buffer size for HCI Command packets. */
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#define BT_BUF_CMD_SIZE(size) BT_BUF_SIZE(BT_HCI_CMD_HDR_SIZE + (size))
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/** Helper to calculate needed buffer size for HCI ISO packets. */
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#define BT_BUF_ISO_SIZE(size) BT_BUF_SIZE(BT_HCI_ISO_HDR_SIZE + \
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BT_HCI_ISO_DATA_HDR_SIZE + \
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(size))
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/** Data size needed for HCI ACL RX buffers */
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#define BT_BUF_ACL_RX_SIZE BT_BUF_ACL_SIZE(CONFIG_BT_BUF_ACL_RX_SIZE)
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@ -28,11 +28,20 @@ extern "C" {
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#include <bluetooth/hci.h>
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/** @def BT_ISO_CHAN_SEND_RESERVE
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* @brief Headroom needed for outgoing buffers
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* @brief Headroom needed for outgoing ISO SDUs
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*/
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#define BT_ISO_CHAN_SEND_RESERVE (CONFIG_BT_HCI_RESERVE + \
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BT_HCI_ISO_HDR_SIZE + \
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BT_HCI_ISO_DATA_HDR_SIZE)
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#define BT_ISO_CHAN_SEND_RESERVE BT_BUF_ISO_SIZE(0)
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/** @def BT_ISO_SDU_BUF_SIZE
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*
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* @brief Helper to calculate needed buffer size for ISO SDUs.
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* Useful for creating buffer pools.
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*
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* @param mtu Required ISO SDU size
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*
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* @return Needed buffer size to match the requested ISO SDU MTU.
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*/
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#define BT_ISO_SDU_BUF_SIZE(mtu) BT_BUF_ISO_SIZE(mtu)
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/** Value to set the ISO data path over HCi. */
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#define BT_ISO_DATA_PATH_HCI 0x00
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