/******************************************************************************
*
* Copyright 2002-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* This module contains API of the audio/video distribution transport
* protocol.
*
******************************************************************************/
#include "avdt_api.h"
#include <string.h>
#include "avdt_int.h"
#include "avdtc_api.h"
#include "bt_target.h"
#include "bt_types.h"
#include "btm_api.h"
#include "btu.h"
#include "l2c_api.h"
#include "stack/include/a2dp_codec_api.h"
/* Control block for AVDTP */
AvdtpCb avdtp_cb;
void avdt_ccb_idle_ccb_timer_timeout(void* data) {
AvdtpCcb* p_ccb = (AvdtpCcb*)data;
uint8_t avdt_event = AVDT_CCB_IDLE_TOUT_EVT;
uint8_t err_code = AVDT_ERR_TIMEOUT;
tAVDT_CCB_EVT avdt_ccb_evt;
avdt_ccb_evt.err_code = err_code;
avdt_ccb_event(p_ccb, avdt_event, &avdt_ccb_evt);
}
void avdt_ccb_ret_ccb_timer_timeout(void* data) {
AvdtpCcb* p_ccb = (AvdtpCcb*)data;
uint8_t avdt_event = AVDT_CCB_RET_TOUT_EVT;
uint8_t err_code = AVDT_ERR_TIMEOUT;
tAVDT_CCB_EVT avdt_ccb_evt;
avdt_ccb_evt.err_code = err_code;
avdt_ccb_event(p_ccb, avdt_event, &avdt_ccb_evt);
}
void avdt_ccb_rsp_ccb_timer_timeout(void* data) {
AvdtpCcb* p_ccb = (AvdtpCcb*)data;
uint8_t avdt_event = AVDT_CCB_RSP_TOUT_EVT;
uint8_t err_code = AVDT_ERR_TIMEOUT;
tAVDT_CCB_EVT avdt_ccb_evt;
avdt_ccb_evt.err_code = err_code;
avdt_ccb_event(p_ccb, avdt_event, &avdt_ccb_evt);
}
void avdt_scb_transport_channel_timer_timeout(void* data) {
AvdtpScb* p_scb = (AvdtpScb*)data;
uint8_t avdt_event = AVDT_SCB_TC_TOUT_EVT;
avdt_scb_event(p_scb, avdt_event, NULL);
}
/*******************************************************************************
*
* Function AVDT_Register
*
* Description This is the system level registration function for the
* AVDTP protocol. This function initializes AVDTP and
* prepares the protocol stack for its use. This function
* must be called once by the system or platform using AVDTP
* before the other functions of the API an be used.
*
*
* Returns void
*
******************************************************************************/
void AVDT_Register(AvdtpRcb* p_reg, tAVDT_CTRL_CBACK* p_cback) {
/* register PSM with L2CAP */
L2CA_Register(AVDT_PSM, (tL2CAP_APPL_INFO*)&avdt_l2c_appl,
true /* enable_snoop */);
/* set security level */
BTM_SetSecurityLevel(true, "", BTM_SEC_SERVICE_AVDTP, p_reg->sec_mask,
AVDT_PSM, BTM_SEC_PROTO_AVDT, AVDT_CHAN_SIG);
BTM_SetSecurityLevel(false, "", BTM_SEC_SERVICE_AVDTP, p_reg->sec_mask,
AVDT_PSM, BTM_SEC_PROTO_AVDT, AVDT_CHAN_SIG);
/* do not use security on the media channel */
BTM_SetSecurityLevel(true, "", BTM_SEC_SERVICE_AVDTP_NOSEC, BTM_SEC_NONE,
AVDT_PSM, BTM_SEC_PROTO_AVDT, AVDT_CHAN_MEDIA);
BTM_SetSecurityLevel(false, "", BTM_SEC_SERVICE_AVDTP_NOSEC, BTM_SEC_NONE,
AVDT_PSM, BTM_SEC_PROTO_AVDT, AVDT_CHAN_MEDIA);
/* do not use security on the reporting channel */
BTM_SetSecurityLevel(true, "", BTM_SEC_SERVICE_AVDTP_NOSEC, BTM_SEC_NONE,
AVDT_PSM, BTM_SEC_PROTO_AVDT, AVDT_CHAN_REPORT);
BTM_SetSecurityLevel(false, "", BTM_SEC_SERVICE_AVDTP_NOSEC, BTM_SEC_NONE,
AVDT_PSM, BTM_SEC_PROTO_AVDT, AVDT_CHAN_REPORT);
/* initialize AVDTP data structures */
avdt_scb_init();
avdt_ccb_init();
avdt_ad_init();
/* copy registration struct */
avdtp_cb.rcb = *p_reg;
avdtp_cb.p_conn_cback = p_cback;
}
/*******************************************************************************
*
* Function AVDT_Deregister
*
* Description This function is called to deregister use AVDTP protocol.
* It is called when AVDTP is no longer being used by any
* application in the system. Before this function can be
* called, all streams must be removed with
* AVDT_RemoveStream().
*
*
* Returns void
*
******************************************************************************/
void AVDT_Deregister(void) {
/* deregister PSM with L2CAP */
L2CA_Deregister(AVDT_PSM);
}
void AVDT_AbortReq(uint8_t handle) {
AVDT_TRACE_WARNING("%s: handle=%d", __func__, handle);
AvdtpScb* p_scb = avdt_scb_by_hdl(handle);
if (p_scb != NULL) {
avdt_scb_event(p_scb, AVDT_SCB_API_ABORT_REQ_EVT, NULL);
} else {
AVDT_TRACE_ERROR("%s Improper SCB, can not abort the stream", __func__);
}
}
/*******************************************************************************
*
* Function AVDT_CreateStream
*
* Description Create a stream endpoint. After a stream endpoint is
* created an application can initiate a connection between
* this endpoint and an endpoint on a peer device. In
* addition, a peer device can discover, get the capabilities,
* and connect to this endpoint.
*
*
* Returns AVDT_SUCCESS if successful, otherwise error.
*
******************************************************************************/
uint16_t AVDT_CreateStream(uint8_t peer_id, uint8_t* p_handle,
const AvdtpStreamConfig& avdtp_stream_config) {
uint16_t result = AVDT_SUCCESS;
AvdtpScb* p_scb;
AVDT_TRACE_DEBUG("%s: peer_id=%d", __func__, peer_id);
/* Verify parameters; if invalid, return failure */
if (((avdtp_stream_config.cfg.psc_mask & (~AVDT_PSC)) != 0) ||
(avdtp_stream_config.p_avdt_ctrl_cback == NULL)) {
result = AVDT_BAD_PARAMS;
}
/* Allocate scb; if no scbs, return failure */
else {
p_scb = avdt_scb_alloc(peer_id, avdtp_stream_config);
if (p_scb == NULL) {
result = AVDT_NO_RESOURCES;
} else {
*p_handle = avdt_scb_to_hdl(p_scb);
}
}
AVDT_TRACE_DEBUG("%s: result=%d handle=%d scb_index=%d", __func__, result,
*p_handle, avdtp_stream_config.scb_index);
return result;
}
/*******************************************************************************
*
* Function AVDT_RemoveStream
*
* Description Remove a stream endpoint. This function is called when
* the application is no longer using a stream endpoint.
* If this function is called when the endpoint is connected
* the connection is closed and then the stream endpoint
* is removed.
*
*
* Returns AVDT_SUCCESS if successful, otherwise error.
*
******************************************************************************/
uint16_t AVDT_RemoveStream(uint8_t handle) {
uint16_t result = AVDT_SUCCESS;
AvdtpScb* p_scb;
AVDT_TRACE_DEBUG("%s: handle=%d", __func__, handle);
/* look up scb */
p_scb = avdt_scb_by_hdl(handle);
if (p_scb == NULL) {
result = AVDT_BAD_HANDLE;
} else {
/* send remove event to scb */
avdt_scb_event(p_scb, AVDT_SCB_API_REMOVE_EVT, NULL);
}
AVDT_TRACE_DEBUG("%s: result=%d", __func__, result);
return result;
}
/*******************************************************************************
*
* Function AVDT_DiscoverReq
*
* Description This function initiates a connection to the AVDTP service
* on the peer device, if not already present, and discovers
* the stream endpoints on the peer device. (Please note
* that AVDTP discovery is unrelated to SDP discovery).
* This function can be called at any time regardless of
* whether there is an AVDTP connection to the peer device.
*
* When discovery is complete, an AVDT_DISCOVER_CFM_EVT
* is sent to the application via its callback function.
* The application must not call AVDT_GetCapReq() or
* AVDT_DiscoverReq() again to the same device until
* discovery is complete.
*
* The memory addressed by sep_info is allocated by the
* application. This memory is written to by AVDTP as part
* of the discovery procedure. This memory must remain
* accessible until the application receives the
* AVDT_DISCOVER_CFM_EVT.
*
* Returns AVDT_SUCCESS if successful, otherwise error.
*
******************************************************************************/
uint16_t AVDT_DiscoverReq(const RawAddress& bd_addr, uint8_t channel_index,
tAVDT_SEP_INFO* p_sep_info, uint8_t max_seps,
tAVDT_CTRL_CBACK* p_cback) {
AvdtpCcb* p_ccb;
uint16_t result = AVDT_SUCCESS;
tAVDT_CCB_EVT evt;
AVDT_TRACE_DEBUG("%s", __func__);
/* find channel control block for this bd addr; if none, allocate one */
p_ccb = avdt_ccb_by_bd(bd_addr);
if (p_ccb == NULL) {
p_ccb = avdt_ccb_alloc_by_channel_index(bd_addr, channel_index);
if (p_ccb == NULL) {
/* could not allocate channel control block */
result = AVDT_NO_RESOURCES;
}
}
if (result == AVDT_SUCCESS) {
/* make sure no discovery or get capabilities req already in progress */
if (p_ccb->proc_busy) {
result = AVDT_BUSY;
}
/* send event to ccb */
else {
evt.discover.p_sep_info = p_sep_info;
evt.discover.num_seps = max_seps;
evt.discover.p_cback = p_cback;
avdt_ccb_event(p_ccb, AVDT_CCB_API_DISCOVER_REQ_EVT, &evt);
}
}
AVDT_TRACE_DEBUG("%s: result=%d", __func__, result);
return result;
}
/*******************************************************************************
*
* Function avdt_get_cap_req
*
* Description internal function to serve AVDT_GetCapReq
*
* Returns AVDT_SUCCESS if successful, otherwise error.
*
******************************************************************************/
static uint16_t avdt_get_cap_req(const RawAddress& bd_addr,
uint8_t channel_index,
tAVDT_CCB_API_GETCAP* p_evt) {
AvdtpCcb* p_ccb = NULL;
uint16_t result = AVDT_SUCCESS;
AVDT_TRACE_DEBUG("%s", __func__);
/* verify SEID */
if ((p_evt->single.seid < AVDT_SEID_MIN) ||
(p_evt->single.seid > AVDT_SEID_MAX)) {
AVDT_TRACE_ERROR("seid: %d", p_evt->single.seid);
result = AVDT_BAD_PARAMS;
}
/* find channel control block for this bd addr; if none, allocate one */
else {
p_ccb = avdt_ccb_by_bd(bd_addr);
if (p_ccb == NULL) {
p_ccb = avdt_ccb_alloc_by_channel_index(bd_addr, channel_index);
if (p_ccb == NULL) {
/* could not allocate channel control block */
result = AVDT_NO_RESOURCES;
}
}
}
if (result == AVDT_SUCCESS) {
/* make sure no discovery or get capabilities req already in progress */
if (p_ccb->proc_busy) {
result = AVDT_BUSY;
}
/* send event to ccb */
else {
avdt_ccb_event(p_ccb, AVDT_CCB_API_GETCAP_REQ_EVT, (tAVDT_CCB_EVT*)p_evt);
}
}
AVDT_TRACE_DEBUG("%s: result=%d", __func__, result);
return result;
}
/*******************************************************************************
*
* Function AVDT_GetCapReq
*
* Description This function initiates a connection to the AVDTP service
* on the peer device, if not already present, and gets the
* capabilities of a stream endpoint on the peer device.
* This function can be called at any time regardless of
* whether there is an AVDTP connection to the peer device.
*
* When the procedure is complete, an AVDT_GETCAP_CFM_EVT is
* sent to the application via its callback function. The
* application must not call AVDT_GetCapReq() or
* AVDT_DiscoverReq() again until the procedure is complete.
*
* The memory pointed to by p_cfg is allocated by the
* application. This memory is written to by AVDTP as part
* of the get capabilities procedure. This memory must
* remain accessible until the application receives
* the AVDT_GETCAP_CFM_EVT.
*
* Returns AVDT_SUCCESS if successful, otherwise error.
*
******************************************************************************/
uint16_t AVDT_GetCapReq(const RawAddress& bd_addr, uint8_t channel_index,
uint8_t seid, AvdtpSepConfig* p_cfg,
tAVDT_CTRL_CBACK* p_cback, bool get_all_cap) {
tAVDT_CCB_API_GETCAP getcap;
uint16_t result = AVDT_SUCCESS;
AVDT_TRACE_DEBUG("%s", __func__);
getcap.single.seid = seid;
if (get_all_cap) {
getcap.single.sig_id = AVDT_SIG_GET_ALLCAP;
} else {
getcap.single.sig_id = AVDT_SIG_GETCAP;
}
getcap.p_cfg = p_cfg;
getcap.p_cback = p_cback;
result = avdt_get_cap_req(bd_addr, channel_index, &getcap);
AVDT_TRACE_DEBUG("%s: result=%d", __func__, result);
return result;
}
/*******************************************************************************
*
* Function AVDT_DelayReport
*
* Description This functions sends a Delay Report to the peer device
* that is associated with a particular SEID.
* This function is called by SNK device.
*
* Returns AVDT_SUCCESS if successful, otherwise error.
*
******************************************************************************/
uint16_t AVDT_DelayReport(uint8_t handle, uint8_t seid, uint16_t delay) {
AvdtpScb* p_scb;
uint16_t result = AVDT_SUCCESS;
tAVDT_SCB_EVT evt;
AVDT_TRACE_DEBUG("%s: handle=%d ceid=%d delay=%d", __func__, handle, seid,
delay);
/* map handle to scb */
p_scb = avdt_scb_by_hdl(handle);
if (p_scb == NULL) {
result = AVDT_BAD_HANDLE;
} else
/* send event to scb */
{
evt.apidelay.hdr.seid = seid;
evt.apidelay.delay = delay;
avdt_scb_event(p_scb, AVDT_SCB_API_DELAY_RPT_REQ_EVT, &evt);
}
AVDT_TRACE_DEBUG("%s: result=%d", __func__, result);
return result;
}
/*******************************************************************************
*
* Function AVDT_OpenReq
*
* Description This function initiates a connection to the AVDTP service
* on the peer device, if not already present, and connects
* to a stream endpoint on a peer device. When the connection
* is completed, an AVDT_OPEN_CFM_EVT is sent to the
* application via the control callback function for this
* handle.
*
* Returns AVDT_SUCCESS if successful, otherwise error.
*
******************************************************************************/
uint16_t AVDT_OpenReq(uint8_t handle, const RawAddress& bd_addr,
uint8_t channel_index, uint8_t seid,
AvdtpSepConfig* p_cfg) {
AvdtpCcb* p_ccb = NULL;
AvdtpScb* p_scb = NULL;
uint16_t result = AVDT_SUCCESS;
tAVDT_SCB_EVT evt;
AVDT_TRACE_DEBUG("%s: handle=%d seid=%d", __func__, handle, seid);
/* verify SEID */
if ((seid < AVDT_SEID_MIN) || (seid > AVDT_SEID_MAX)) {
result = AVDT_BAD_PARAMS;
}
/* map handle to scb */
else {
p_scb = avdt_scb_by_hdl(handle);
if (p_scb == NULL) {
result = AVDT_BAD_HANDLE;
}
/* find channel control block for this bd addr; if none, allocate one */
else {
p_ccb = avdt_ccb_by_bd(bd_addr);
if (p_ccb == NULL) {
p_ccb = avdt_ccb_alloc_by_channel_index(bd_addr, channel_index);
if (p_ccb == NULL) {
/* could not allocate channel control block */
result = AVDT_NO_RESOURCES;
}
}
}
}
/* send event to scb */
if (result == AVDT_SUCCESS) {
AVDT_TRACE_DEBUG("%s: codec: %s", __func__,
A2DP_CodecInfoString(p_cfg->codec_info).c_str());
evt.msg.config_cmd.hdr.seid = seid;
evt.msg.config_cmd.hdr.ccb_idx = avdt_ccb_to_idx(p_ccb);
evt.msg.config_cmd.int_seid = handle;
evt.msg.config_cmd.p_cfg = p_cfg;
avdt_scb_event(p_scb, AVDT_SCB_API_SETCONFIG_REQ_EVT, &evt);
}
AVDT_TRACE_DEBUG("%s: result=%d", __func__, result);
return result;
}
/*******************************************************************************
*
* Function AVDT_ConfigRsp
*
* Description Respond to a configure request from the peer device. This
* function must be called if the application receives an
* AVDT_CONFIG_IND_EVT through its control callback.
*
*
* Returns AVDT_SUCCESS if successful, otherwise error.
*
******************************************************************************/
uint16_t AVDT_ConfigRsp(uint8_t handle, uint8_t label, uint8_t error_code,
uint8_t category) {
AvdtpScb* p_scb;
tAVDT_SCB_EVT evt;
uint16_t result = AVDT_SUCCESS;
uint8_t event_code;
AVDT_TRACE_DEBUG("%s: handle=%d label=%d error_code=0x%x category=%d",
__func__, handle, label, error_code, category);
/* map handle to scb */
p_scb = avdt_scb_by_hdl(handle);
if (p_scb == NULL) {
result = AVDT_BAD_HANDLE;
}
/* handle special case when this function is called but peer has not send
** a configuration cmd; ignore and return error result
*/
else if (!p_scb->in_use) {
result = AVDT_BAD_HANDLE;
}
/* send event to scb */
else {
evt.msg.hdr.err_code = error_code;
evt.msg.hdr.err_param = category;
evt.msg.hdr.label = label;
if (error_code == 0) {
event_code = AVDT_SCB_API_SETCONFIG_RSP_EVT;
} else {
event_code = AVDT_SCB_API_SETCONFIG_REJ_EVT;
}
avdt_scb_event(p_scb, event_code, &evt);
}
AVDT_TRACE_DEBUG("%s: result=%d", __func__, result);
return result;
}
/*******************************************************************************
*
* Function AVDT_StartReq
*
* Description Start one or more stream endpoints. This initiates the
* transfer of media packets for the streams. All stream
* endpoints must previously be opened. When the streams
* are started, an AVDT_START_CFM_EVT is sent to the
* application via the control callback function for each
* stream.
*
*
* Returns AVDT_SUCCESS if successful, otherwise error.
*
******************************************************************************/
uint16_t AVDT_StartReq(uint8_t* p_handles, uint8_t num_handles) {
AvdtpScb* p_scb = NULL;
tAVDT_CCB_EVT evt;
uint16_t result = AVDT_SUCCESS;
int i;
AVDT_TRACE_DEBUG("%s: num_handles=%d", __func__, num_handles);
if ((num_handles == 0) || (num_handles > AVDT_NUM_SEPS)) {
result = AVDT_BAD_PARAMS;
} else {
/* verify handles */
for (i = 0; i < num_handles; i++) {
p_scb = avdt_scb_by_hdl(p_handles[i]);
if (p_scb == NULL) {
result = AVDT_BAD_HANDLE;
break;
}
}
}
if (result == AVDT_SUCCESS) {
if (p_scb->p_ccb == NULL) {
result = AVDT_BAD_HANDLE;
} else {
/* send event to ccb */
memcpy(evt.msg.multi.seid_list, p_handles, num_handles);
evt.msg.multi.num_seps = num_handles;
avdt_ccb_event(p_scb->p_ccb, AVDT_CCB_API_START_REQ_EVT, &evt);
}
}
AVDT_TRACE_DEBUG("%s: result=%d", __func__, result);
return result;
}
/*******************************************************************************
*
* Function AVDT_SuspendReq
*
* Description Suspend one or more stream endpoints. This suspends the
* transfer of media packets for the streams. All stream
* endpoints must previously be open and started. When the
* streams are suspended, an AVDT_SUSPEND_CFM_EVT is sent to
* the application via the control callback function for
* each stream.
*
*
* Returns AVDT_SUCCESS if successful, otherwise error.
*
******************************************************************************/
uint16_t AVDT_SuspendReq(uint8_t* p_handles, uint8_t num_handles) {
AvdtpScb* p_scb = NULL;
tAVDT_CCB_EVT evt;
uint16_t result = AVDT_SUCCESS;
int i;
AVDT_TRACE_DEBUG("%s: num_handles=%d", __func__, num_handles);
if ((num_handles == 0) || (num_handles > AVDT_NUM_SEPS)) {
result = AVDT_BAD_PARAMS;
} else {
/* verify handles */
for (i = 0; i < num_handles; i++) {
p_scb = avdt_scb_by_hdl(p_handles[i]);
if (p_scb == NULL) {
result = AVDT_BAD_HANDLE;
break;
}
}
}
if (result == AVDT_SUCCESS) {
if (p_scb->p_ccb == NULL) {
result = AVDT_BAD_HANDLE;
} else {
/* send event to ccb */
memcpy(evt.msg.multi.seid_list, p_handles, num_handles);
evt.msg.multi.num_seps = num_handles;
avdt_ccb_event(p_scb->p_ccb, AVDT_CCB_API_SUSPEND_REQ_EVT, &evt);
}
}
AVDT_TRACE_DEBUG("%s: result=%d", __func__, result);
return result;
}
/*******************************************************************************
*
* Function AVDT_CloseReq
*
* Description Close a stream endpoint. This stops the transfer of media
* packets and closes the transport channel associated with
* this stream endpoint. When the stream is closed, an
* AVDT_CLOSE_CFM_EVT is sent to the application via the
* control callback function for this handle.
*
*
* Returns AVDT_SUCCESS if successful, otherwise error.
*
******************************************************************************/
uint16_t AVDT_CloseReq(uint8_t handle) {
AvdtpScb* p_scb;
uint16_t result = AVDT_SUCCESS;
AVDT_TRACE_DEBUG("%s: handle=%d", __func__, handle);
/* map handle to scb */
p_scb = avdt_scb_by_hdl(handle);
if (p_scb == NULL) {
result = AVDT_BAD_HANDLE;
} else
/* send event to scb */
{
avdt_scb_event(p_scb, AVDT_SCB_API_CLOSE_REQ_EVT, NULL);
}
AVDT_TRACE_DEBUG("%s: result=%d", __func__, result);
return result;
}
/*******************************************************************************
*
* Function AVDT_ReconfigReq
*
* Description Reconfigure a stream endpoint. This allows the application
* to change the codec or content protection capabilities of
* a stream endpoint after it has been opened. This function
* can only be called if the stream is opened but not started
* or if the stream has been suspended. When the procedure
* is completed, an AVDT_RECONFIG_CFM_EVT is sent to the
* application via the control callback function for this
* handle.
*
*
* Returns AVDT_SUCCESS if successful, otherwise error.
*
******************************************************************************/
uint16_t AVDT_ReconfigReq(uint8_t handle, AvdtpSepConfig* p_cfg) {
AvdtpScb* p_scb;
uint16_t result = AVDT_SUCCESS;
tAVDT_SCB_EVT evt;
AVDT_TRACE_DEBUG("%s: handle=%d", __func__, handle);
/* map handle to scb */
p_scb = avdt_scb_by_hdl(handle);
if (p_scb == NULL) {
result = AVDT_BAD_HANDLE;
}
/* send event to scb */
else {
/* force psc_mask to zero */
p_cfg->psc_mask = 0;
evt.msg.reconfig_cmd.p_cfg = p_cfg;
avdt_scb_event(p_scb, AVDT_SCB_API_RECONFIG_REQ_EVT, &evt);
}
AVDT_TRACE_DEBUG("%s: result=%d", __func__, result);
return result;
}
/*******************************************************************************
*
* Function AVDT_ReconfigRsp
*
* Description Respond to a reconfigure request from the peer device.
* This function must be called if the application receives
* an AVDT_RECONFIG_IND_EVT through its control callback.
*
*
* Returns AVDT_SUCCESS if successful, otherwise error.
*
******************************************************************************/
uint16_t AVDT_ReconfigRsp(uint8_t handle, uint8_t label, uint8_t error_code,
uint8_t category) {
AvdtpScb* p_scb;
tAVDT_SCB_EVT evt;
uint16_t result = AVDT_SUCCESS;
AVDT_TRACE_DEBUG("%s: handle=%d label=%d error_code=0x%x category=%d",
__func__, handle, label, error_code, category);
/* map handle to scb */
p_scb = avdt_scb_by_hdl(handle);
if (p_scb == NULL) {
result = AVDT_BAD_HANDLE;
}
/* send event to scb */
else {
evt.msg.hdr.err_code = error_code;
evt.msg.hdr.err_param = category;
evt.msg.hdr.label = label;
avdt_scb_event(p_scb, AVDT_SCB_API_RECONFIG_RSP_EVT, &evt);
}
AVDT_TRACE_DEBUG("%s: result=%d", __func__, result);
return result;
}
/*******************************************************************************
*
* Function AVDT_SecurityReq
*
* Description Send a security request to the peer device. When the
* security procedure is completed, an AVDT_SECURITY_CFM_EVT
* is sent to the application via the control callback function
* for this handle. (Please note that AVDTP security
* procedures are unrelated to Bluetooth link level security.)
*
*
* Returns AVDT_SUCCESS if successful, otherwise error.
*
******************************************************************************/
uint16_t AVDT_SecurityReq(uint8_t handle, uint8_t* p_data, uint16_t len) {
AvdtpScb* p_scb;
uint16_t result = AVDT_SUCCESS;
tAVDT_SCB_EVT evt;
AVDT_TRACE_DEBUG("%s: handle=%d len=%d", __func__, handle, len);
/* map handle to scb */
p_scb = avdt_scb_by_hdl(handle);
if (p_scb == NULL) {
result = AVDT_BAD_HANDLE;
}
/* send event to scb */
else {
evt.msg.security_rsp.p_data = p_data;
evt.msg.security_rsp.len = len;
avdt_scb_event(p_scb, AVDT_SCB_API_SECURITY_REQ_EVT, &evt);
}
AVDT_TRACE_DEBUG("%s: result=%d", __func__, result);
return result;
}
/*******************************************************************************
*
* Function AVDT_SecurityRsp
*
* Description Respond to a security request from the peer device.
* This function must be called if the application receives
* an AVDT_SECURITY_IND_EVT through its control callback.
* (Please note that AVDTP security procedures are unrelated
* to Bluetooth link level security.)
*
*
* Returns AVDT_SUCCESS if successful, otherwise error.
*
******************************************************************************/
uint16_t AVDT_SecurityRsp(uint8_t handle, uint8_t label, uint8_t error_code,
uint8_t* p_data, uint16_t len) {
AvdtpScb* p_scb;
uint16_t result = AVDT_SUCCESS;
tAVDT_SCB_EVT evt;
AVDT_TRACE_DEBUG("%s: handle=%d label=%d error_code=0x%x len=%d", __func__,
handle, label, error_code, len);
/* map handle to scb */
p_scb = avdt_scb_by_hdl(handle);
if (p_scb == NULL) {
result = AVDT_BAD_HANDLE;
}
/* send event to scb */
else {
evt.msg.security_rsp.hdr.err_code = error_code;
evt.msg.security_rsp.hdr.label = label;
evt.msg.security_rsp.p_data = p_data;
evt.msg.security_rsp.len = len;
avdt_scb_event(p_scb, AVDT_SCB_API_SECURITY_RSP_EVT, &evt);
}
AVDT_TRACE_DEBUG("%s: result=%d", __func__, result);
return result;
}
/*******************************************************************************
*
* Function AVDT_WriteReqOpt
*
* Description Send a media packet to the peer device. The stream must
* be started before this function is called. Also, this
* function can only be called if the stream is a SRC.
*
* When AVDTP has sent the media packet and is ready for the
* next packet, an AVDT_WRITE_CFM_EVT is sent to the
* application via the control callback. The application must
* wait for the AVDT_WRITE_CFM_EVT before it makes the next
* call to AVDT_WriteReq(). If the applications calls
* AVDT_WriteReq() before it receives the event the packet
* will not be sent. The application may make its first call
* to AVDT_WriteReq() after it receives an AVDT_START_CFM_EVT
* or AVDT_START_IND_EVT.
*
* The application passes the packet using the BT_HDR
* structure.
* This structure is described in section 2.1. The offset
* field must be equal to or greater than AVDT_MEDIA_OFFSET
* (if NO_RTP is specified, L2CAP_MIN_OFFSET can be used).
* This allows enough space in the buffer for the L2CAP and
* AVDTP headers.
*
* The memory pointed to by p_pkt must be a GKI buffer
* allocated by the application. This buffer will be freed
* by the protocol stack; the application must not free
* this buffer.
*
* The opt parameter allows passing specific options like:
* - NO_RTP : do not add the RTP header to buffer
*
* Returns AVDT_SUCCESS if successful, otherwise error.
*
******************************************************************************/
uint16_t AVDT_WriteReqOpt(uint8_t handle, BT_HDR* p_pkt, uint32_t time_stamp,
uint8_t m_pt, tAVDT_DATA_OPT_MASK opt) {
AvdtpScb* p_scb;
tAVDT_SCB_EVT evt;
uint16_t result = AVDT_SUCCESS;
AVDT_TRACE_DEBUG("%s: handle=%d timestamp=%d m_pt=0x%x opt=0x%x", __func__,
handle, time_stamp, m_pt, opt);
/* map handle to scb */
p_scb = avdt_scb_by_hdl(handle);
if (p_scb == NULL) {
result = AVDT_BAD_HANDLE;
} else {
evt.apiwrite.p_buf = p_pkt;
evt.apiwrite.time_stamp = time_stamp;
evt.apiwrite.m_pt = m_pt;
evt.apiwrite.opt = opt;
avdt_scb_event(p_scb, AVDT_SCB_API_WRITE_REQ_EVT, &evt);
}
AVDT_TRACE_DEBUG("%s: result=%d", __func__, result);
return result;
}
/*******************************************************************************
*
* Function AVDT_WriteReq
*
* Description Send a media packet to the peer device. The stream must
* be started before this function is called. Also, this
* function can only be called if the stream is a SRC.
*
* When AVDTP has sent the media packet and is ready for the
* next packet, an AVDT_WRITE_CFM_EVT is sent to the
* application via the control callback. The application must
* wait for the AVDT_WRITE_CFM_EVT before it makes the next
* call to AVDT_WriteReq(). If the applications calls
* AVDT_WriteReq() before it receives the event the packet
* will not be sent. The application may make its first call
* to AVDT_WriteReq() after it receives an AVDT_START_CFM_EVT
* or AVDT_START_IND_EVT.
*
* The application passes the packet using the BT_HDR
* structure.
* This structure is described in section 2.1. The offset
* field must be equal to or greater than AVDT_MEDIA_OFFSET.
* This allows enough space in the buffer for the L2CAP and
* AVDTP headers.
*
* The memory pointed to by p_pkt must be a GKI buffer
* allocated by the application. This buffer will be freed
* by the protocol stack; the application must not free
* this buffer.
*
*
* Returns AVDT_SUCCESS if successful, otherwise error.
*
******************************************************************************/
uint16_t AVDT_WriteReq(uint8_t handle, BT_HDR* p_pkt, uint32_t time_stamp,
uint8_t m_pt) {
return AVDT_WriteReqOpt(handle, p_pkt, time_stamp, m_pt, AVDT_DATA_OPT_NONE);
}
/*******************************************************************************
*
* Function AVDT_ConnectReq
*
* Description This function initiates an AVDTP signaling connection
* to the peer device. When the connection is completed, an
* AVDT_CONNECT_IND_EVT is sent to the application via its
* control callback function. If the connection attempt fails
* an AVDT_DISCONNECT_IND_EVT is sent. The security mask
* parameter overrides the outgoing security mask set in
* AVDT_Register().
*
* Returns AVDT_SUCCESS if successful, otherwise error.
*
******************************************************************************/
uint16_t AVDT_ConnectReq(const RawAddress& bd_addr, uint8_t channel_index,
uint8_t sec_mask, tAVDT_CTRL_CBACK* p_cback) {
AvdtpCcb* p_ccb = NULL;
uint16_t result = AVDT_SUCCESS;
tAVDT_CCB_EVT evt;
AVDT_TRACE_WARNING("%s: address=%s channel_index=%d sec_mask=0x%x", __func__,
bd_addr.ToString().c_str(), channel_index, sec_mask);
/* find channel control block for this bd addr; if none, allocate one */
p_ccb = avdt_ccb_by_bd(bd_addr);
if (p_ccb == NULL) {
p_ccb = avdt_ccb_alloc_by_channel_index(bd_addr, channel_index);
if (p_ccb == NULL) {
/* could not allocate channel control block */
result = AVDT_NO_RESOURCES;
}
} else if (!p_ccb->ll_opened) {
AVDT_TRACE_WARNING("AVDT_ConnectReq: CCB LL is in the middle of opening");
/* ccb was already allocated for the incoming signalling. */
result = AVDT_BUSY;
}
if (result == AVDT_SUCCESS) {
/* send event to ccb */
evt.connect.p_cback = p_cback;
evt.connect.sec_mask = sec_mask;
avdt_ccb_event(p_ccb, AVDT_CCB_API_CONNECT_REQ_EVT, &evt);
}
AVDT_TRACE_WARNING("%s: address=%s result=%d", __func__,
bd_addr.ToString().c_str(), result);
return result;
}
/*******************************************************************************
*
* Function AVDT_DisconnectReq
*
* Description This function disconnect an AVDTP signaling connection
* to the peer device. When disconnected an
* AVDT_DISCONNECT_IND_EVT is sent to the application via its
* control callback function.
*
* Returns AVDT_SUCCESS if successful, otherwise error.
*
******************************************************************************/
uint16_t AVDT_DisconnectReq(const RawAddress& bd_addr,
tAVDT_CTRL_CBACK* p_cback) {
AvdtpCcb* p_ccb = NULL;
uint16_t result = AVDT_SUCCESS;
tAVDT_CCB_EVT evt;
AVDT_TRACE_WARNING("%s: address=%s", __func__, bd_addr.ToString().c_str());
/* find channel control block for this bd addr; if none, error */
p_ccb = avdt_ccb_by_bd(bd_addr);
if (p_ccb == NULL) {
result = AVDT_BAD_PARAMS;
}
if (result == AVDT_SUCCESS) {
/* send event to ccb */
evt.disconnect.p_cback = p_cback;
avdt_ccb_event(p_ccb, AVDT_CCB_API_DISCONNECT_REQ_EVT, &evt);
}
AVDT_TRACE_DEBUG("%s: address=%s result=%d", __func__,
bd_addr.ToString().c_str(), result);
return result;
}
/*******************************************************************************
*
* Function AVDT_GetL2CapChannel
*
* Description Get the L2CAP CID used by the handle.
*
* Returns CID if successful, otherwise 0.
*
******************************************************************************/
uint16_t AVDT_GetL2CapChannel(uint8_t handle) {
AvdtpScb* p_scb;
AvdtpCcb* p_ccb;
uint8_t tcid;
uint16_t lcid = 0;
/* map handle to scb */
if (((p_scb = avdt_scb_by_hdl(handle)) != NULL) &&
((p_ccb = p_scb->p_ccb) != NULL)) {
/* get tcid from type, scb */
tcid = avdt_ad_type_to_tcid(AVDT_CHAN_MEDIA, p_scb);
lcid = avdtp_cb.ad.rt_tbl[avdt_ccb_to_idx(p_ccb)][tcid].lcid;
}
return (lcid);
}
/*******************************************************************************
*
* Function AVDT_GetSignalChannel
*
* Description Get the L2CAP CID used by the signal channel of the given
* handle.
*
* Returns CID if successful, otherwise 0.
*
******************************************************************************/
uint16_t AVDT_GetSignalChannel(uint8_t handle, const RawAddress& bd_addr) {
AvdtpScb* p_scb;
AvdtpCcb* p_ccb;
uint8_t tcid = 0; /* tcid is always 0 for signal channel */
uint16_t lcid = 0;
/* map handle to scb */
if (((p_scb = avdt_scb_by_hdl(handle)) != NULL) &&
((p_ccb = p_scb->p_ccb) != NULL)) {
lcid = avdtp_cb.ad.rt_tbl[avdt_ccb_to_idx(p_ccb)][tcid].lcid;
} else {
p_ccb = avdt_ccb_by_bd(bd_addr);
if (p_ccb != NULL) {
lcid = avdtp_cb.ad.rt_tbl[avdt_ccb_to_idx(p_ccb)][tcid].lcid;
}
}
return (lcid);
}
/*******************************************************************************
*
* Function AVDT_SendReport
*
* Description
*
*
*
* Returns
*
******************************************************************************/
uint16_t AVDT_SendReport(uint8_t handle, AVDT_REPORT_TYPE type,
tAVDT_REPORT_DATA* p_data) {
AvdtpScb* p_scb;
uint16_t result = AVDT_BAD_PARAMS;
AvdtpTransportChannel* p_tbl;
uint8_t *p, *plen, *pm1, *p_end;
uint32_t ssrc;
uint16_t len;
AVDT_TRACE_DEBUG("%s: handle=%d type=%d", __func__, handle, type);
/* map handle to scb && verify parameters */
if (((p_scb = avdt_scb_by_hdl(handle)) != NULL) && (p_scb->p_ccb != NULL) &&
(((type == AVDT_RTCP_PT_SR) &&
(p_scb->stream_config.tsep == AVDT_TSEP_SRC)) ||
((type == AVDT_RTCP_PT_RR) &&
(p_scb->stream_config.tsep == AVDT_TSEP_SNK)) ||
(type == AVDT_RTCP_PT_SDES))) {
result = AVDT_NO_RESOURCES;
/* build SR - assume fit in one packet */
p_tbl = avdt_ad_tc_tbl_by_type(AVDT_CHAN_REPORT, p_scb->p_ccb, p_scb);
if (p_tbl->state == AVDT_AD_ST_OPEN) {
BT_HDR* p_pkt = (BT_HDR*)osi_malloc(p_tbl->peer_mtu + sizeof(BT_HDR));
p_pkt->offset = L2CAP_MIN_OFFSET;
p = (uint8_t*)(p_pkt + 1) + p_pkt->offset;
pm1 = p;
*p++ = AVDT_MEDIA_OCTET1 | 1;
*p++ = type;
/* save the location for length */
plen = p;
p += 2;
ssrc = avdt_scb_gen_ssrc(p_scb);
UINT32_TO_BE_STREAM(p, ssrc);
switch (type) {
case AVDT_RTCP_PT_SR: /* Sender Report */
*pm1 = AVDT_MEDIA_OCTET1;
UINT32_TO_BE_STREAM(p, p_data->sr.ntp_sec);
UINT32_TO_BE_STREAM(p, p_data->sr.ntp_frac);
UINT32_TO_BE_STREAM(p, p_data->sr.rtp_time);
UINT32_TO_BE_STREAM(p, p_data->sr.pkt_count);
UINT32_TO_BE_STREAM(p, p_data->sr.octet_count);
break;
case AVDT_RTCP_PT_RR: /* Receiver Report */
*p++ = p_data->rr.frag_lost;
AVDT_TRACE_API("packet_lost: %d", p_data->rr.packet_lost);
p_data->rr.packet_lost &= 0xFFFFFF;
AVDT_TRACE_API("packet_lost: %d", p_data->rr.packet_lost);
UINT24_TO_BE_STREAM(p, p_data->rr.packet_lost);
UINT32_TO_BE_STREAM(p, p_data->rr.seq_num_rcvd);
UINT32_TO_BE_STREAM(p, p_data->rr.jitter);
UINT32_TO_BE_STREAM(p, p_data->rr.lsr);
UINT32_TO_BE_STREAM(p, p_data->rr.dlsr);
break;
case AVDT_RTCP_PT_SDES: /* Source Description */
*p++ = AVDT_RTCP_SDES_CNAME;
len = strlen((char*)p_data->cname);
if (len > AVDT_MAX_CNAME_SIZE) len = AVDT_MAX_CNAME_SIZE;
*p++ = (uint8_t)len;
strlcpy((char*)p, (char*)p_data->cname, len + 1);
p += len;
break;
}
p_end = p;
len = p - pm1 - 1;
UINT16_TO_BE_STREAM(plen, len);
/* set the actual payload length */
p_pkt->len = p_end - p;
/* send the packet */
if (L2CAP_DW_FAILED !=
avdt_ad_write_req(AVDT_CHAN_REPORT, p_scb->p_ccb, p_scb, p_pkt))
result = AVDT_SUCCESS;
}
}
AVDT_TRACE_DEBUG("%s: result=%d", __func__, result);
return result;
}
/******************************************************************************
*
* Function AVDT_SetTraceLevel
*
* Description Sets the trace level for AVDT. If 0xff is passed, the
* current trace level is returned.
*
* Input Parameters:
* new_level: The level to set the AVDT tracing to:
* 0xff-returns the current setting.
* 0-turns off tracing.
* >= 1-Errors.
* >= 2-Warnings.
* >= 3-APIs.
* >= 4-Events.
* >= 5-Debug.
*
* Returns The new trace level or current trace level if
* the input parameter is 0xff.
*
*****************************************************************************/
uint8_t AVDT_SetTraceLevel(uint8_t new_level) {
if (new_level != 0xFF) avdtp_cb.SetTraceLevel(new_level);
return avdtp_cb.TraceLevel();
}
void stack_debug_avdtp_api_dump(int fd) {
if (appl_trace_level < BT_TRACE_LEVEL_DEBUG) return;
dprintf(fd, "\nAVDTP Stack State:\n");
dprintf(fd, " AVDTP signalling L2CAP channel MTU: %d\n",
avdtp_cb.rcb.ctrl_mtu);
dprintf(fd, " Security mask: 0x%x\n", avdtp_cb.rcb.sec_mask);
for (size_t i = 0; i < AVDT_NUM_LINKS; i++) {
const AvdtpCcb& ccb = avdtp_cb.ccb[i];
if (ccb.peer_addr.IsEmpty()) {
continue;
}
dprintf(fd, "\n Channel control block: %zu peer: %s\n", i,
ccb.peer_addr.ToString().c_str());
dprintf(fd, " Allocated: %s\n", ccb.allocated ? "true" : "false");
dprintf(fd, " State: %d\n", ccb.state);
dprintf(fd, " Link-layer opened: %s\n",
ccb.ll_opened ? "true" : "false");
dprintf(fd, " Discover in progress: %s\n",
ccb.proc_busy ? "true" : "false");
dprintf(fd, " Congested: %s\n", ccb.cong ? "true" : "false");
dprintf(fd, " Reinitiate connection on idle: %s\n",
ccb.reconn ? "true" : "false");
dprintf(fd, " Command retransmission count: %d\n", ccb.ret_count);
dprintf(fd, " BTA AV SCB index: %d\n", ccb.BtaAvScbIndex());
for (size_t i = 0; i < AVDT_NUM_SEPS; i++) {
const AvdtpScb& scb = ccb.scb[i];
if (!scb.in_use) {
continue;
}
dprintf(fd, "\n Stream control block: %zu\n", i);
dprintf(fd, " SEP codec: %s\n",
A2DP_CodecName(scb.stream_config.cfg.codec_info));
dprintf(fd, " SEP protocol service capabilities: 0x%x\n",
scb.stream_config.cfg.psc_mask);
dprintf(fd, " SEP type: 0x%x\n", scb.stream_config.tsep);
dprintf(fd, " Media type: 0x%x\n", scb.stream_config.media_type);
dprintf(fd, " MTU: %d\n", scb.stream_config.mtu);
dprintf(fd, " SCB handle: %d\n", scb.ScbHandle());
dprintf(fd, " SCB index: %d\n", scb.stream_config.scb_index);
dprintf(fd, " Configured codec: %s\n",
A2DP_CodecName(scb.curr_cfg.codec_info));
dprintf(fd, " Requested codec: %s\n",
A2DP_CodecName(scb.req_cfg.codec_info));
dprintf(fd, " Transport channel connect timer: %s\n",
alarm_is_scheduled(scb.transport_channel_timer)
? "Scheduled"
: "Not scheduled");
dprintf(fd, " Channel control block peer: %s\n",
(scb.p_ccb != nullptr) ? scb.p_ccb->peer_addr.ToString().c_str()
: "null");
dprintf(fd, " Allocated: %s\n", scb.allocated ? "true" : "false");
dprintf(fd, " In use: %s\n", scb.in_use ? "true" : "false");
dprintf(fd, " Role: 0x%x\n", scb.role);
dprintf(fd, " Remove: %s\n", scb.remove ? "true" : "false");
dprintf(fd, " State: %d\n", scb.state);
dprintf(fd, " Peer SEID: %d\n", scb.peer_seid);
dprintf(fd, " Current event: %d\n", scb.curr_evt);
dprintf(fd, " Congested: %s\n", scb.cong ? "true" : "false");
dprintf(fd, " Close response code: %d\n", scb.close_code);
}
}
}