esp-idf/components/bt/host/bluedroid/stack/avrc/avrc_pars_ct.c

/******************************************************************************
 *
 *  Copyright (C) 2006-2013 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.
 *
 ******************************************************************************/
#include <string.h>
#include "common/bt_target.h"
#include "stack/avrc_api.h"
#include "stack/avrc_defs.h"
#include "avrc_int.h"
#include "common/bt_defs.h"

#if (defined(AVRC_INCLUDED) && AVRC_INCLUDED == TRUE)

/*****************************************************************************
**  Global data
*****************************************************************************/

#if (AVRC_METADATA_INCLUDED == TRUE)

/*******************************************************************************
**
** Function         avrc_pars_vendor_rsp
**
** Description      This function parses the vendor specific commands defined by
**                  Bluetooth SIG
**
** Returns          AVRC_STS_NO_ERROR, if the message in p_data is parsed successfully.
**                  Otherwise, the error code defined by AVRCP 1.4
**
*******************************************************************************/
static tAVRC_STS avrc_pars_vendor_rsp(tAVRC_MSG_VENDOR *p_msg, tAVRC_RESPONSE *p_result)
{
    tAVRC_STS  status = AVRC_STS_NO_ERROR;
    UINT8   *p;
    UINT16  len;
    UINT8 eventid = 0;

    /* Check the vendor data */
    if (p_msg->vendor_len == 0) {
        return AVRC_STS_NO_ERROR;
    }
    if (p_msg->p_vendor_data == NULL) {
        return AVRC_STS_INTERNAL_ERR;
    }

    p = p_msg->p_vendor_data;
    BE_STREAM_TO_UINT8 (p_result->pdu, p);
    p++; /* skip the reserved/packe_type byte */
    BE_STREAM_TO_UINT16 (len, p);
    AVRC_TRACE_DEBUG("avrc_pars_vendor_rsp() ctype:0x%x pdu:0x%x, len:%d/0x%x", p_msg->hdr.ctype, p_result->pdu, len, len);
    if (p_msg->hdr.ctype == AVRC_RSP_REJ) {
        p_result->rsp.status = *p;
        return p_result->rsp.status;
    }

    switch (p_result->pdu) {
        /* case AVRC_PDU_REQUEST_CONTINUATION_RSP: 0x40 */
        /* case AVRC_PDU_ABORT_CONTINUATION_RSP:   0x41 */

#if (AVRC_ADV_CTRL_INCLUDED == TRUE)
    case AVRC_PDU_SET_ABSOLUTE_VOLUME:      /* 0x50 */
        if (len != 1) {
            status = AVRC_STS_INTERNAL_ERR;
        } else {
            BE_STREAM_TO_UINT8 (p_result->volume.volume, p);
        }
        break;
#endif /* (AVRC_ADV_CTRL_INCLUDED == TRUE) */

    case AVRC_PDU_REGISTER_NOTIFICATION:    /* 0x31 */
#if (AVRC_ADV_CTRL_INCLUDED == TRUE)
        BE_STREAM_TO_UINT8 (eventid, p);
        if (AVRC_EVT_VOLUME_CHANGE == eventid
                && (AVRC_RSP_CHANGED == p_msg->hdr.ctype || AVRC_RSP_INTERIM == p_msg->hdr.ctype
                    || AVRC_RSP_REJ == p_msg->hdr.ctype || AVRC_RSP_NOT_IMPL == p_msg->hdr.ctype)) {
            p_result->reg_notif.status = p_msg->hdr.ctype;
            p_result->reg_notif.event_id = eventid;
            BE_STREAM_TO_UINT8 (p_result->reg_notif.param.volume, p);
        }
        // todo: parse the response for other event_ids
        AVRC_TRACE_DEBUG("avrc_pars_vendor_rsp PDU reg notif response:event 0x%x", eventid);
        break;
#endif /* (AVRC_ADV_CTRL_INCLUDED == TRUE) */
    case AVRC_PDU_GET_CAPABILITIES:        /* 0x10 */
        BE_STREAM_TO_UINT8 (p_result->get_caps.capability_id, p);
        BE_STREAM_TO_UINT8 (p_result->get_caps.count, p);
        if (p_result->get_caps.capability_id == AVRC_CAP_EVENTS_SUPPORTED) {
            if (p_result->get_caps.count > AVRC_CAP_MAX_NUM_EVT_ID) {
                status = AVRC_STS_INTERNAL_ERR;
            } else {
                BE_STREAM_TO_ARRAY(p, p_result->get_caps.param.event_id, p_result->get_caps.count);
            }
        } else if (p_result->get_caps.capability_id == AVRC_CAP_COMPANY_ID) {
            if (p_result->get_caps.count > AVRC_CAP_MAX_NUM_COMP_ID) {
                status = AVRC_STS_INTERNAL_ERR;
            } else {
                for (int i = 0; i < p_result->get_caps.count; ++i) {
                    BE_STREAM_TO_UINT24(p_result->get_caps.param.company_id[i], p);
                }
            }
        }
        break;
    default:
        status = AVRC_STS_BAD_CMD;
        break;
    }

    return status;
}

/*******************************************************************************
**
** Function         AVRC_ParsResponse
**
** Description      This function is a superset of AVRC_ParsMetadata to parse the response.
**
** Returns          AVRC_STS_NO_ERROR, if the message in p_data is parsed successfully.
**                  Otherwise, the error code defined by AVRCP 1.4
**
*******************************************************************************/
tAVRC_STS AVRC_ParsResponse (tAVRC_MSG *p_msg, tAVRC_RESPONSE *p_result)
{
    tAVRC_STS  status = AVRC_STS_INTERNAL_ERR;
    UINT16  id;

    if (p_msg && p_result) {
        switch (p_msg->hdr.opcode) {
        case AVRC_OP_VENDOR:     /*  0x00    Vendor-dependent commands */
            status = avrc_pars_vendor_rsp(&p_msg->vendor, p_result);
            break;

        case AVRC_OP_PASS_THRU:  /*  0x7C    panel subunit opcode */
            status = avrc_pars_pass_thru(&p_msg->pass, &id);
            if (status == AVRC_STS_NO_ERROR) {
                p_result->pdu = (UINT8)id;
            }
            break;

        default:
            AVRC_TRACE_ERROR("AVRC_ParsResponse() unknown opcode:0x%x", p_msg->hdr.opcode);
            break;
        }
        p_result->rsp.opcode = p_msg->hdr.opcode;
        p_result->rsp.status = status;
    }
    return status;
}


#endif /* (AVRC_METADATA_INCLUDED == TRUE) */

#endif /* #if (defined(AVRC_INCLUDED) && AVRC_INCLUDED == TRUE) */