stack/avrc/avrc_sdp.c

/******************************************************************************
 *
 *  Copyright (C) 2003-2013 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.
 *
 ******************************************************************************/

/******************************************************************************
 *
 *  AVRCP SDP related functions
 *
 ******************************************************************************/
#include <string.h>

#include "gki.h"
#include "avrc_api.h"
#include "avrc_int.h"

/*****************************************************************************
**  Global data
*****************************************************************************/
#if AVRC_DYNAMIC_MEMORY == FALSE
tAVRC_CB avrc_cb;
#endif

/* update AVRC_NUM_PROTO_ELEMS if this constant is changed */
const tSDP_PROTOCOL_ELEM  avrc_proto_list [] =
{
    {UUID_PROTOCOL_L2CAP, 1, {AVCT_PSM, 0} },
#if AVRC_METADATA_INCLUDED == TRUE
    {UUID_PROTOCOL_AVCTP, 1, {AVCT_REV_1_2, 0}  }
#else
    {UUID_PROTOCOL_AVCTP, 1, {AVCT_REV_1_0, 0}  }
#endif
};



/******************************************************************************
**
** Function         avrc_sdp_cback
**
** Description      This is the SDP callback function used by A2D_FindService.
**                  This function will be executed by SDP when the service
**                  search is completed.  If the search is successful, it
**                  finds the first record in the database that matches the
**                  UUID of the search.  Then retrieves various parameters
**                  from the record.  When it is finished it calls the
**                  application callback function.
**
** Returns          Nothing.
**
******************************************************************************/
static void avrc_sdp_cback(UINT16 status)
{
    AVRC_TRACE_API1("avrc_sdp_cback status: %d", status);

    /* reset service_uuid, so can start another find service */
    avrc_cb.service_uuid = 0;

    /* return info from sdp record in app callback function */
    (*avrc_cb.p_cback) (status);

    return;
}

/******************************************************************************
**
** Function         AVRC_FindService
**
** Description      This function is called by the application to perform service
**                  discovery and retrieve AVRCP SDP record information from a
**                  peer device.  Information is returned for the first service
**                  record found on the server that matches the service UUID.
**                  The callback function will be executed when service discovery
**                  is complete.  There can only be one outstanding call to
**                  AVRC_FindService() at a time; the application must wait for
**                  the callback before it makes another call to the function.
**                  The application is responsible for allocating memory for the
**                  discovery database.  It is recommended that the size of the
**                  discovery database be at least 300 bytes.  The application
**                  can deallocate the memory after the callback function has
**                  executed.
**
**                  Input Parameters:
**                      service_uuid: Indicates TG(UUID_SERVCLASS_AV_REM_CTRL_TARGET)
**                                           or CT(UUID_SERVCLASS_AV_REMOTE_CONTROL)
**
**                      bd_addr:  BD address of the peer device.
**
**                      p_db:  SDP discovery database parameters.
**
**                      p_cback:  Pointer to the callback function.
**
**                  Output Parameters:
**                      None.
**
** Returns          AVRC_SUCCESS if successful.
**                  AVRC_BAD_PARAMS if discovery database parameters are invalid.
**                  AVRC_NO_RESOURCES if there are not enough resources to
**                                    perform the service search.
**
******************************************************************************/
UINT16 AVRC_FindService(UINT16 service_uuid, BD_ADDR bd_addr,
                tAVRC_SDP_DB_PARAMS *p_db, tAVRC_FIND_CBACK *p_cback)
{
    tSDP_UUID   uuid_list;
    BOOLEAN     result = TRUE;
    UINT16      a2d_attr_list[] = {ATTR_ID_SERVICE_CLASS_ID_LIST, /* update AVRC_NUM_ATTR, if changed */
                                   ATTR_ID_PROTOCOL_DESC_LIST,
                                   ATTR_ID_BT_PROFILE_DESC_LIST,
                                   ATTR_ID_SERVICE_NAME,
                                   ATTR_ID_SUPPORTED_FEATURES,
                                   ATTR_ID_PROVIDER_NAME};

    AVRC_TRACE_API1("AVRC_FindService uuid: %x", service_uuid);
    if( (service_uuid != UUID_SERVCLASS_AV_REM_CTRL_TARGET && service_uuid != UUID_SERVCLASS_AV_REMOTE_CONTROL) ||
        p_db == NULL || p_db->p_db == NULL || p_cback == NULL)
        return AVRC_BAD_PARAM;

    /* check if it is busy */
    if( avrc_cb.service_uuid == UUID_SERVCLASS_AV_REM_CTRL_TARGET ||
        avrc_cb.service_uuid == UUID_SERVCLASS_AV_REMOTE_CONTROL)
        return AVRC_NO_RESOURCES;

    /* set up discovery database */
    uuid_list.len = LEN_UUID_16;
    uuid_list.uu.uuid16 = service_uuid;

    if(p_db->p_attrs == NULL || p_db->num_attr == 0)
    {
        p_db->p_attrs  = a2d_attr_list;
        p_db->num_attr = AVRC_NUM_ATTR;
    }

    result = SDP_InitDiscoveryDb(p_db->p_db, p_db->db_len, 1, &uuid_list, p_db->num_attr,
                                 p_db->p_attrs);

    if (result == TRUE)
    {
        /* store service_uuid and discovery db pointer */
        avrc_cb.p_db = p_db->p_db;
        avrc_cb.service_uuid = service_uuid;
        avrc_cb.p_cback = p_cback;

        /* perform service search */
        result = SDP_ServiceSearchAttributeRequest(bd_addr, p_db->p_db, avrc_sdp_cback);
    }

    return (result ? AVRC_SUCCESS : AVRC_FAIL);
}

/******************************************************************************
**
** Function         AVRC_AddRecord
**
** Description      This function is called to build an AVRCP SDP record.
**                  Prior to calling this function the application must
**                  call SDP_CreateRecord() to create an SDP record.
**
**                  Input Parameters:
**                      service_uuid:  Indicates TG(UUID_SERVCLASS_AV_REM_CTRL_TARGET)
**                                            or CT(UUID_SERVCLASS_AV_REMOTE_CONTROL)
**
**                      p_service_name:  Pointer to a null-terminated character
**                      string containing the service name.
**                      If service name is not used set this to NULL.
**
**                      p_provider_name:  Pointer to a null-terminated character
**                      string containing the provider name.
**                      If provider name is not used set this to NULL.
**
**                      categories:  Supported categories.
**
**                      sdp_handle:  SDP handle returned by SDP_CreateRecord().
**
**                  Output Parameters:
**                      None.
**
** Returns          AVRC_SUCCESS if successful.
**                  AVRC_NO_RESOURCES if not enough resources to build the SDP record.
**
******************************************************************************/
UINT16 AVRC_AddRecord(UINT16 service_uuid, char *p_service_name,
                char *p_provider_name, UINT16 categories, UINT32 sdp_handle)
{
    UINT16      browse_list[1];
    BOOLEAN     result = TRUE;
    UINT8       temp[8];
    UINT8       *p;
    UINT16      count = 1;
    UINT16      class_list[2];


    AVRC_TRACE_API1("AVRC_AddRecord uuid: %x", service_uuid);

    if( service_uuid != UUID_SERVCLASS_AV_REM_CTRL_TARGET && service_uuid != UUID_SERVCLASS_AV_REMOTE_CONTROL )
        return AVRC_BAD_PARAM;

    /* add service class id list */
    class_list[0] = service_uuid;
    result &= SDP_AddServiceClassIdList(sdp_handle, count, class_list);

    /* add protocol descriptor list   */
    result &= SDP_AddProtocolList(sdp_handle, AVRC_NUM_PROTO_ELEMS, (tSDP_PROTOCOL_ELEM *)avrc_proto_list);

    /* add profile descriptor list   */
#if AVRC_METADATA_INCLUDED == TRUE
    result &= SDP_AddProfileDescriptorList(sdp_handle, UUID_SERVCLASS_AV_REMOTE_CONTROL, AVRC_REV_1_3);
#else
    result &= SDP_AddProfileDescriptorList(sdp_handle, UUID_SERVCLASS_AV_REMOTE_CONTROL, AVRC_REV_1_0);
#endif


    /* add supported categories */
    p = temp;
    UINT16_TO_BE_STREAM(p, categories);
    result &= SDP_AddAttribute(sdp_handle, ATTR_ID_SUPPORTED_FEATURES, UINT_DESC_TYPE,
              (UINT32)2, (UINT8*)temp);

    /* add provider name */
    if (p_provider_name != NULL)
    {
        result &= SDP_AddAttribute(sdp_handle, ATTR_ID_PROVIDER_NAME, TEXT_STR_DESC_TYPE,
                    (UINT32)(strlen(p_provider_name)+1), (UINT8 *) p_provider_name);
    }

    /* add service name */
    if (p_service_name != NULL)
    {
        result &= SDP_AddAttribute(sdp_handle, ATTR_ID_SERVICE_NAME, TEXT_STR_DESC_TYPE,
                    (UINT32)(strlen(p_service_name)+1), (UINT8 *) p_service_name);
    }

    /* add browse group list */
    browse_list[0] = UUID_SERVCLASS_PUBLIC_BROWSE_GROUP;
    result &= SDP_AddUuidSequence(sdp_handle, ATTR_ID_BROWSE_GROUP_LIST, 1, browse_list);


    return (result ? AVRC_SUCCESS : AVRC_FAIL);
}



/******************************************************************************
**
** Function         AVRC_SetTraceLevel
**
** Description      Sets the trace level for AVRC. If 0xff is passed, the
**                  current trace level is returned.
**
**                  Input Parameters:
**                      new_level:  The level to set the AVRC 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 AVRC_SetTraceLevel (UINT8 new_level)
{
    if (new_level != 0xFF)
        avrc_cb.trace_level = new_level;

    return (avrc_cb.trace_level);
}

/*******************************************************************************
**
** Function         AVRC_Init
**
** Description      This function is called at stack startup to allocate the
**                  control block (if using dynamic memory), and initializes the
**                  control block and tracing level.
**
** Returns          void
**
*******************************************************************************/
void AVRC_Init(void)
{
    memset(&avrc_cb, 0, sizeof(tAVRC_CB));

#if defined(AVRC_INITIAL_TRACE_LEVEL)
    avrc_cb.trace_level  = AVRC_INITIAL_TRACE_LEVEL;
#else
    avrc_cb.trace_level  = BT_TRACE_LEVEL_NONE;
#endif
}