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222 lines
8.1 KiB
222 lines
8.1 KiB
/******************************************************************************
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*
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* Copyright 2003-2012 Broadcom Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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/******************************************************************************
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*
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* Interface to AVRCP optional commands
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*
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******************************************************************************/
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#include <base/logging.h>
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#include <string.h>
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#include "avrc_api.h"
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#include "avrc_int.h"
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#include "bt_common.h"
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/******************************************************************************
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*
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* Function avrc_vendor_msg
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*
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* Description Compose a VENDOR DEPENDENT command according to p_msg
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*
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* Input Parameters:
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* p_msg: Pointer to VENDOR DEPENDENT message structure.
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*
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* Output Parameters:
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* None.
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*
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* Returns pointer to a valid GKI buffer if successful.
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* NULL if p_msg is NULL.
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*
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*****************************************************************************/
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static BT_HDR* avrc_vendor_msg(tAVRC_MSG_VENDOR* p_msg) {
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BT_HDR* p_cmd;
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uint8_t* p_data;
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CHECK(p_msg != NULL);
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CHECK(AVRC_META_CMD_BUF_SIZE > (AVRC_MIN_CMD_LEN + p_msg->vendor_len));
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p_cmd = (BT_HDR*)osi_calloc(AVRC_META_CMD_BUF_SIZE);
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p_cmd->offset = AVCT_MSG_OFFSET;
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p_data = (uint8_t*)(p_cmd + 1) + p_cmd->offset;
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*p_data++ = (p_msg->hdr.ctype & AVRC_CTYPE_MASK);
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*p_data++ =
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(p_msg->hdr.subunit_type << AVRC_SUBTYPE_SHIFT) | p_msg->hdr.subunit_id;
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*p_data++ = AVRC_OP_VENDOR;
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AVRC_CO_ID_TO_BE_STREAM(p_data, p_msg->company_id);
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if (p_msg->vendor_len && p_msg->p_vendor_data)
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memcpy(p_data, p_msg->p_vendor_data, p_msg->vendor_len);
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p_cmd->len = (uint16_t)(p_data + p_msg->vendor_len - (uint8_t*)(p_cmd + 1) -
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p_cmd->offset);
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p_cmd->layer_specific = AVCT_DATA_CTRL;
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return p_cmd;
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}
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/******************************************************************************
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*
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* Function AVRC_UnitCmd
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*
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* Description Send a UNIT INFO command to the peer device. This
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* function can only be called for controller role connections.
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* Any response message from the peer is passed back through
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* the tAVRC_MSG_CBACK callback function.
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*
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* Input Parameters:
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* handle: Handle of this connection.
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*
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* label: Transaction label.
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*
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* Output Parameters:
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* None.
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*
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* Returns AVRC_SUCCESS if successful.
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* AVRC_BAD_HANDLE if handle is invalid.
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*
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*****************************************************************************/
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uint16_t AVRC_UnitCmd(uint8_t handle, uint8_t label) {
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BT_HDR* p_cmd = (BT_HDR*)osi_calloc(AVRC_CMD_BUF_SIZE);
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uint8_t* p_data;
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p_cmd->offset = AVCT_MSG_OFFSET;
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p_data = (uint8_t*)(p_cmd + 1) + p_cmd->offset;
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*p_data++ = AVRC_CMD_STATUS;
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/* unit & id ignore */
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*p_data++ = (AVRC_SUB_UNIT << AVRC_SUBTYPE_SHIFT) | AVRC_SUBID_IGNORE;
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*p_data++ = AVRC_OP_UNIT_INFO;
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memset(p_data, AVRC_CMD_OPRND_PAD, AVRC_UNIT_OPRND_BYTES);
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p_cmd->len =
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p_data + AVRC_UNIT_OPRND_BYTES - (uint8_t*)(p_cmd + 1) - p_cmd->offset;
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p_cmd->layer_specific = AVCT_DATA_CTRL;
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return AVCT_MsgReq(handle, label, AVCT_CMD, p_cmd);
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}
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/******************************************************************************
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*
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* Function AVRC_SubCmd
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*
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* Description Send a SUBUNIT INFO command to the peer device. This
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* function can only be called for controller role connections.
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* Any response message from the peer is passed back through
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* the tAVRC_MSG_CBACK callback function.
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*
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* Input Parameters:
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* handle: Handle of this connection.
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*
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* label: Transaction label.
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*
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* page: Specifies which part of the subunit type table
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* is requested. For AVRCP it is typically zero.
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* Value range is 0-7.
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*
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* Output Parameters:
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* None.
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*
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* Returns AVRC_SUCCESS if successful.
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* AVRC_BAD_HANDLE if handle is invalid.
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*
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*****************************************************************************/
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uint16_t AVRC_SubCmd(uint8_t handle, uint8_t label, uint8_t page) {
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BT_HDR* p_cmd = (BT_HDR*)osi_calloc(AVRC_CMD_BUF_SIZE);
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uint8_t* p_data;
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p_cmd->offset = AVCT_MSG_OFFSET;
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p_data = (uint8_t*)(p_cmd + 1) + p_cmd->offset;
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*p_data++ = AVRC_CMD_STATUS;
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/* unit & id ignore */
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*p_data++ = (AVRC_SUB_UNIT << AVRC_SUBTYPE_SHIFT) | AVRC_SUBID_IGNORE;
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*p_data++ = AVRC_OP_SUB_INFO;
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*p_data++ =
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((page & AVRC_SUB_PAGE_MASK) << AVRC_SUB_PAGE_SHIFT) | AVRC_SUB_EXT_CODE;
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memset(p_data, AVRC_CMD_OPRND_PAD, AVRC_SUB_OPRND_BYTES);
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p_cmd->len =
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p_data + AVRC_SUB_OPRND_BYTES - (uint8_t*)(p_cmd + 1) - p_cmd->offset;
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p_cmd->layer_specific = AVCT_DATA_CTRL;
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return AVCT_MsgReq(handle, label, AVCT_CMD, p_cmd);
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}
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/******************************************************************************
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*
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* Function AVRC_VendorCmd
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*
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* Description Send a VENDOR DEPENDENT command to the peer device. This
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* function can only be called for controller role connections.
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* Any response message from the peer is passed back through
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* the tAVRC_MSG_CBACK callback function.
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*
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* Input Parameters:
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* handle: Handle of this connection.
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*
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* label: Transaction label.
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*
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* p_msg: Pointer to VENDOR DEPENDENT message structure.
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*
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* Output Parameters:
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* None.
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*
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* Returns AVRC_SUCCESS if successful.
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* AVRC_BAD_HANDLE if handle is invalid.
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*
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*****************************************************************************/
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uint16_t AVRC_VendorCmd(uint8_t handle, uint8_t label,
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tAVRC_MSG_VENDOR* p_msg) {
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BT_HDR* p_buf = avrc_vendor_msg(p_msg);
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if (p_buf)
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return AVCT_MsgReq(handle, label, AVCT_CMD, p_buf);
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else
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return AVCT_NO_RESOURCES;
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}
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/******************************************************************************
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*
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* Function AVRC_VendorRsp
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*
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* Description Send a VENDOR DEPENDENT response to the peer device. This
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* function can only be called for target role connections.
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* This function must be called when a VENDOR DEPENDENT
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* command message is received from the peer through the
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* tAVRC_MSG_CBACK callback function.
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*
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* Input Parameters:
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* handle: Handle of this connection.
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*
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* label: Transaction label. Must be the same value as
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* passed with the command message in the callback
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* function.
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*
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* p_msg: Pointer to VENDOR DEPENDENT message structure.
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*
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* Output Parameters:
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* None.
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*
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* Returns AVRC_SUCCESS if successful.
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* AVRC_BAD_HANDLE if handle is invalid.
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*
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*****************************************************************************/
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uint16_t AVRC_VendorRsp(uint8_t handle, uint8_t label,
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tAVRC_MSG_VENDOR* p_msg) {
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BT_HDR* p_buf = avrc_vendor_msg(p_msg);
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if (p_buf)
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return AVCT_MsgReq(handle, label, AVCT_RSP, p_buf);
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else
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return AVCT_NO_RESOURCES;
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}
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