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Commit 9a115540 authored by kuanyuhuang's avatar kuanyuhuang
Browse files

Support setting BT controller Low Latency mode(2/2) 

Handle bta latency event and set acl priority and latency by sending vendor vsc.

Bug: 240637363
Bug: 223126227
Tag: #feature
Ignore-AOSP-First: TM QPR1 feature
Test: test on sink device support dynamic spatial audio
Change-Id: I55188cc7a316f213156c39d2985420f0617421e2
parent ca4a03aa

system/bta/av/bta_av_act.cc

+19 −0
Original line number Diff line number Diff line
@@ -1352,6 +1352,25 @@ void bta_av_set_use_latency_mode(tBTA_AV_SCB* p_scb, bool use_latency_mode) { 
  L2CA_UseLatencyMode(p_scb->PeerAddress(), use_latency_mode);

}



/*******************************************************************************

 *

 * Function         bta_av_api_set_latency

 *

 * Description      set stream latency.

 *

 * Returns          void

 *

 ******************************************************************************/

void bta_av_api_set_latency(tBTA_AV_DATA* p_data) {

  tBTA_AV_SCB* p_scb =

      bta_av_hndl_to_scb(p_data->api_set_latency.hdr.layer_specific);



  tL2CAP_LATENCY latency = p_data->api_set_latency.is_low_latency

                               ? L2CAP_LATENCY_LOW

                               : L2CAP_LATENCY_NORMAL;

  L2CA_SetAclLatency(p_scb->PeerAddress(), latency);

}



/**

 * Find the index for the free LCB entry to use.

 *

system/bta/av/bta_av_int.h

+1 −0
Original line number Diff line number Diff line
@@ -741,6 +741,7 @@ extern bool bta_av_link_role_ok(tBTA_AV_SCB* p_scb, uint8_t bits); 
extern void bta_av_api_disconnect(tBTA_AV_DATA* p_data);

extern void bta_av_set_use_latency_mode(tBTA_AV_SCB* p_scb,

                                        bool use_latency_mode);

extern void bta_av_api_set_latency(tBTA_AV_DATA* p_data);

extern void bta_av_sig_chg(tBTA_AV_DATA* p_data);

extern void bta_av_signalling_timer(tBTA_AV_DATA* p_data);

extern void bta_av_rc_disc_done(tBTA_AV_DATA* p_data);

system/bta/av/bta_av_main.cc

+3 −0
Original line number Diff line number Diff line
@@ -1105,6 +1105,9 @@ static void bta_av_non_state_machine_event(uint16_t event, 
    case BTA_AV_API_DISCONNECT_EVT:

      bta_av_api_disconnect(p_data);

      break;

    case BTA_AV_API_SET_LATENCY_EVT:

      bta_av_api_set_latency(p_data);

      break;

    case BTA_AV_CI_SRC_DATA_READY_EVT:

      bta_av_ci_data(p_data);

      break;

system/stack/include/hcidefs.h

+6 −2
Original line number Diff line number Diff line
@@ -888,9 +888,13 @@ typedef struct { 


/* Parameter information for HCI_BRCM_SET_ACL_PRIORITY */

#define HCI_BRCM_ACL_PRIORITY_PARAM_SIZE 3

#define HCI_BRCM_ACL_PRIORITY_LOW 0x00

#define HCI_BRCM_ACL_PRIORITY_HIGH 0xFF

#define HCI_BRCM_SET_ACL_PRIORITY (0x0057 | HCI_GRP_VENDOR_SPECIFIC)

#define HCI_BRCM_ACL_HIGH_PRIORITY_TO_NORMAL_PRIORITY 0x00

#define HCI_BRCM_ACL_NORMAL_PRIORITY_TO_HIGH_PRIORITY 0xFF

#define HCI_BRCM_ACL_NORMAL_PRIORITY_TO_HIGH_PRIORITY_LOW_LATENCY 0xF3

#define HCI_BRCM_ACL_HIGH_PRIORITY_LOW_LATENCY_TO_NORMAL_PRIORITY 0xF2

#define HCI_BRCM_ACL_HIGH_PRIORITY_TO_HIGH_PRIORITY_LOW_LATENCY 0xF1

#define HCI_BRCM_ACL_HIGH_PRIORITY_LOW_LATENCY_TO_HIGH_PRIORITY 0xF0



#define LMP_COMPID_GOOGLE 0xE0

system/stack/include/l2c_api.h

+18 −0
Original line number Diff line number Diff line
@@ -63,6 +63,12 @@ typedef enum : uint8_t { 
  L2CAP_PRIORITY_HIGH = 1,

} tL2CAP_PRIORITY;



/* Values for priority parameter to L2CA_SetAclLatency */

typedef enum : uint8_t {

  L2CAP_LATENCY_NORMAL = 0,

  L2CAP_LATENCY_LOW = 1,

} tL2CAP_LATENCY;



/* Values for priority parameter to L2CA_SetTxPriority */

#define L2CAP_CHNL_PRIORITY_HIGH 0

#define L2CAP_CHNL_PRIORITY_LOW 2
@@ -660,6 +666,18 @@ extern bool L2CA_UseLatencyMode(const RawAddress& bd_addr, 
extern bool L2CA_SetAclPriority(const RawAddress& bd_addr,

                                tL2CAP_PRIORITY priority);



/*******************************************************************************

 *

 * Function         L2CA_SetAclLatency

 *

 * Description      Sets the transmission latency for a channel.

 *

 * Returns          true if a valid channel, else false

 *

 ******************************************************************************/

extern bool L2CA_SetAclLatency(const RawAddress& bd_addr,

                               tL2CAP_LATENCY latency);



/*******************************************************************************

 *

 * Function         L2CA_SetTxPriority