/******************************************************************************
*
* Copyright (C) 2003-2012 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.
*
******************************************************************************/
/******************************************************************************
*
* Interface to AVRCP optional commands
*
******************************************************************************/
#include <base/logging.h>
#include <string.h>
#include "avrc_api.h"
#include "avrc_int.h"
#include "bt_common.h"
/******************************************************************************
*
* Function avrc_vendor_msg
*
* Description Compose a VENDOR DEPENDENT command according to p_msg
*
* Input Parameters:
* p_msg: Pointer to VENDOR DEPENDENT message structure.
*
* Output Parameters:
* None.
*
* Returns pointer to a valid GKI buffer if successful.
* NULL if p_msg is NULL.
*
*****************************************************************************/
static BT_HDR* avrc_vendor_msg(tAVRC_MSG_VENDOR* p_msg) {
BT_HDR* p_cmd;
uint8_t* p_data;
CHECK(p_msg != NULL);
#if (AVRC_METADATA_INCLUDED == TRUE)
CHECK(AVRC_META_CMD_BUF_SIZE > (AVRC_MIN_CMD_LEN + p_msg->vendor_len));
p_cmd = (BT_HDR*)osi_malloc(AVRC_META_CMD_BUF_SIZE);
#else
CHECK(AVRC_CMD_BUF_SIZE > (AVRC_MIN_CMD_LEN + p_msg->vendor_len));
p_cmd = (BT_HDR*)osi_malloc(AVRC_CMD_BUF_SIZE);
#endif
p_cmd->offset = AVCT_MSG_OFFSET;
p_data = (uint8_t*)(p_cmd + 1) + p_cmd->offset;
*p_data++ = (p_msg->hdr.ctype & AVRC_CTYPE_MASK);
*p_data++ =
(p_msg->hdr.subunit_type << AVRC_SUBTYPE_SHIFT) | p_msg->hdr.subunit_id;
*p_data++ = AVRC_OP_VENDOR;
AVRC_CO_ID_TO_BE_STREAM(p_data, p_msg->company_id);
if (p_msg->vendor_len && p_msg->p_vendor_data)
memcpy(p_data, p_msg->p_vendor_data, p_msg->vendor_len);
p_cmd->len = (uint16_t)(p_data + p_msg->vendor_len - (uint8_t*)(p_cmd + 1) -
p_cmd->offset);
p_cmd->layer_specific = AVCT_DATA_CTRL;
return p_cmd;
}
/******************************************************************************
*
* Function AVRC_UnitCmd
*
* Description Send a UNIT INFO command to the peer device. This
* function can only be called for controller role connections.
* Any response message from the peer is passed back through
* the tAVRC_MSG_CBACK callback function.
*
* Input Parameters:
* handle: Handle of this connection.
*
* label: Transaction label.
*
* Output Parameters:
* None.
*
* Returns AVRC_SUCCESS if successful.
* AVRC_BAD_HANDLE if handle is invalid.
*
*****************************************************************************/
uint16_t AVRC_UnitCmd(uint8_t handle, uint8_t label) {
BT_HDR* p_cmd = (BT_HDR*)osi_malloc(AVRC_CMD_BUF_SIZE);
uint8_t* p_data;
p_cmd->offset = AVCT_MSG_OFFSET;
p_data = (uint8_t*)(p_cmd + 1) + p_cmd->offset;
*p_data++ = AVRC_CMD_STATUS;
/* unit & id ignore */
*p_data++ = (AVRC_SUB_UNIT << AVRC_SUBTYPE_SHIFT) | AVRC_SUBID_IGNORE;
*p_data++ = AVRC_OP_UNIT_INFO;
memset(p_data, AVRC_CMD_OPRND_PAD, AVRC_UNIT_OPRND_BYTES);
p_cmd->len =
p_data + AVRC_UNIT_OPRND_BYTES - (uint8_t*)(p_cmd + 1) - p_cmd->offset;
p_cmd->layer_specific = AVCT_DATA_CTRL;
return AVCT_MsgReq(handle, label, AVCT_CMD, p_cmd);
}
/******************************************************************************
*
* Function AVRC_SubCmd
*
* Description Send a SUBUNIT INFO command to the peer device. This
* function can only be called for controller role connections.
* Any response message from the peer is passed back through
* the tAVRC_MSG_CBACK callback function.
*
* Input Parameters:
* handle: Handle of this connection.
*
* label: Transaction label.
*
* page: Specifies which part of the subunit type table
* is requested. For AVRCP it is typically zero.
* Value range is 0-7.
*
* Output Parameters:
* None.
*
* Returns AVRC_SUCCESS if successful.
* AVRC_BAD_HANDLE if handle is invalid.
*
*****************************************************************************/
uint16_t AVRC_SubCmd(uint8_t handle, uint8_t label, uint8_t page) {
BT_HDR* p_cmd = (BT_HDR*)osi_malloc(AVRC_CMD_BUF_SIZE);
uint8_t* p_data;
p_cmd->offset = AVCT_MSG_OFFSET;
p_data = (uint8_t*)(p_cmd + 1) + p_cmd->offset;
*p_data++ = AVRC_CMD_STATUS;
/* unit & id ignore */
*p_data++ = (AVRC_SUB_UNIT << AVRC_SUBTYPE_SHIFT) | AVRC_SUBID_IGNORE;
*p_data++ = AVRC_OP_SUB_INFO;
*p_data++ =
((page & AVRC_SUB_PAGE_MASK) << AVRC_SUB_PAGE_SHIFT) | AVRC_SUB_EXT_CODE;
memset(p_data, AVRC_CMD_OPRND_PAD, AVRC_SUB_OPRND_BYTES);
p_cmd->len =
p_data + AVRC_SUB_OPRND_BYTES - (uint8_t*)(p_cmd + 1) - p_cmd->offset;
p_cmd->layer_specific = AVCT_DATA_CTRL;
return AVCT_MsgReq(handle, label, AVCT_CMD, p_cmd);
}
/******************************************************************************
*
* Function AVRC_VendorCmd
*
* Description Send a VENDOR DEPENDENT command to the peer device. This
* function can only be called for controller role connections.
* Any response message from the peer is passed back through
* the tAVRC_MSG_CBACK callback function.
*
* Input Parameters:
* handle: Handle of this connection.
*
* label: Transaction label.
*
* p_msg: Pointer to VENDOR DEPENDENT message structure.
*
* Output Parameters:
* None.
*
* Returns AVRC_SUCCESS if successful.
* AVRC_BAD_HANDLE if handle is invalid.
*
*****************************************************************************/
uint16_t AVRC_VendorCmd(uint8_t handle, uint8_t label,
tAVRC_MSG_VENDOR* p_msg) {
BT_HDR* p_buf = avrc_vendor_msg(p_msg);
if (p_buf)
return AVCT_MsgReq(handle, label, AVCT_CMD, p_buf);
else
return AVCT_NO_RESOURCES;
}
/******************************************************************************
*
* Function AVRC_VendorRsp
*
* Description Send a VENDOR DEPENDENT response to the peer device. This
* function can only be called for target role connections.
* This function must be called when a VENDOR DEPENDENT
* command message is received from the peer through the
* tAVRC_MSG_CBACK callback function.
*
* Input Parameters:
* handle: Handle of this connection.
*
* label: Transaction label. Must be the same value as
* passed with the command message in the callback
* function.
*
* p_msg: Pointer to VENDOR DEPENDENT message structure.
*
* Output Parameters:
* None.
*
* Returns AVRC_SUCCESS if successful.
* AVRC_BAD_HANDLE if handle is invalid.
*
*****************************************************************************/
uint16_t AVRC_VendorRsp(uint8_t handle, uint8_t label,
tAVRC_MSG_VENDOR* p_msg) {
BT_HDR* p_buf = avrc_vendor_msg(p_msg);
if (p_buf)
return AVCT_MsgReq(handle, label, AVCT_RSP, p_buf);
else
return AVCT_NO_RESOURCES;
}