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OVMS3-idf/components/bt/bluedroid/stack/avrc/avrc_pars_tg.c
wangmengyang 61bd453c15 component/bt: implement AVRCP Target APIs 
1. Add more notification events to the enum according to the event list in AVRCP specification.
2. Add API and callback events for basic AVRCP target functionalities to do init, deinit, callback-registration, connection status indication.
3. Implement API to set/get supported PASSTHROUGH command on local AVRCP TG, implement callback events for remote passthrough command indication.
4. Implement API to set/get supported notification eventIDs on local AVRCP TG, implement API to send event notifications to remote CT. \
   Currently supported event in TG only includes ESP_AVRC_RN_VOLUME_CHANGE(0xd), which can be extended in later commits.
5. Implement callback events for SetAbsoluteVolume command indication on TG.
6. Add limitation of event_ids supported in RegisterNotification command in CT. The supported event_ids include: \
   ESP_AVRC_RN_PLAY_STATUS_CHANGE(0x1), ESP_AVRC_RN_TRACK_CHANGE(0x2), ESP_AVRC_RN_PLAY_POS_CHANGE(0x5), ESP_AVRC_RN_VOLUME_CHANGE(0xd).
7. Add feature bit mask in parameter of callback event ESP_AVRC_CT_REMOTE_FEATURES_EVT for peer feature information got from SDP.
8. Add API and callback event to AVRCP CT to retrieve remote TG's supported notification event capabilities.
9. Modify data type for parameter of callback event ESP_AVRC_CT_CHANGE_NOTIFY_EVT.
10. Change AVRCP version from 1.3 to 1.4 for compatibility cause in using AbsoluteVolume feature.
11. Modify local AVRCP device to be category 1 as CT and category 2 as TG that applies to bluetooth headphones or speakers.
12. Update the use of AVRCP APIs and events in the two examples: a2dp_sink and a2dp_gatts_coex, which include the demo of volume control and notification.
2019-04-10 16:34:13 +08:00

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/******************************************************************************
*
* 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.
*
******************************************************************************/
#include <string.h>
#include "common/bt_target.h"
#include "stack/avrc_api.h"
#include "stack/avrc_defs.h"
#include "avrc_int.h"
#if (defined(AVRC_INCLUDED) && AVRC_INCLUDED == TRUE)
/*****************************************************************************
** Global data
*****************************************************************************/
#if (AVRC_METADATA_INCLUDED == TRUE)
/*******************************************************************************
**
** Function avrc_pars_vendor_cmd
**
** 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_cmd(tAVRC_MSG_VENDOR *p_msg, tAVRC_COMMAND *p_result,
UINT8 *p_buf, UINT16 buf_len)
{
tAVRC_STS status = AVRC_STS_NO_ERROR;
UINT8 *p;
UINT16 len;
UINT8 xx, yy;
UINT8 *p_u8;
UINT16 *p_u16;
UINT32 u32, u32_2, *p_u32;
tAVRC_APP_SETTING *p_app_set;
UINT16 size_needed;
/* 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;
p_result->pdu = *p++;
AVRC_TRACE_DEBUG("avrc_pars_vendor_cmd() pdu:0x%x", p_result->pdu);
if (!AVRC_IsValidAvcType (p_result->pdu, p_msg->hdr.ctype)) {
AVRC_TRACE_DEBUG("avrc_pars_vendor_cmd() detects wrong AV/C type!");
status = AVRC_STS_BAD_CMD;
}
p++; /* skip the reserved byte */
BE_STREAM_TO_UINT16 (len, p);
if ((len + 4) != (p_msg->vendor_len)) {
status = AVRC_STS_INTERNAL_ERR;
}
if (status != AVRC_STS_NO_ERROR) {
return status;
}
switch (p_result->pdu) {
case AVRC_PDU_GET_CAPABILITIES: /* 0x10 */
p_result->get_caps.capability_id = *p++;
if (!AVRC_IS_VALID_CAP_ID(p_result->get_caps.capability_id)) {
status = AVRC_STS_BAD_PARAM;
} else if (len != 1) {
status = AVRC_STS_INTERNAL_ERR;
}
break;
case AVRC_PDU_LIST_PLAYER_APP_ATTR: /* 0x11 */
/* no additional parameters */
if (len != 0) {
status = AVRC_STS_INTERNAL_ERR;
}
break;
case AVRC_PDU_LIST_PLAYER_APP_VALUES: /* 0x12 */
p_result->list_app_values.attr_id = *p++;
if (!AVRC_IS_VALID_ATTRIBUTE(p_result->list_app_values.attr_id)) {
status = AVRC_STS_BAD_PARAM;
} else if (len != 1) {
status = AVRC_STS_INTERNAL_ERR;
}
break;
case AVRC_PDU_GET_CUR_PLAYER_APP_VALUE: /* 0x13 */
case AVRC_PDU_GET_PLAYER_APP_ATTR_TEXT: /* 0x15 */
BE_STREAM_TO_UINT8 (p_result->get_cur_app_val.num_attr, p);
if (len != (p_result->get_cur_app_val.num_attr + 1)) {
status = AVRC_STS_INTERNAL_ERR;
break;
}
p_u8 = p_result->get_cur_app_val.attrs;
for (xx = 0, yy = 0; xx < p_result->get_cur_app_val.num_attr; xx++) {
/* only report the valid player app attributes */
if (AVRC_IsValidPlayerAttr(*p)) {
p_u8[yy++] = *p;
}
p++;
}
p_result->get_cur_app_val.num_attr = yy;
if (yy == 0) {
status = AVRC_STS_BAD_PARAM;
}
break;
case AVRC_PDU_SET_PLAYER_APP_VALUE: /* 0x14 */
BE_STREAM_TO_UINT8 (p_result->set_app_val.num_val, p);
size_needed = sizeof(tAVRC_APP_SETTING);
if (p_buf && (len == ((p_result->set_app_val.num_val << 1) + 1))) {
p_result->set_app_val.p_vals = (tAVRC_APP_SETTING *)p_buf;
p_app_set = p_result->set_app_val.p_vals;
for (xx = 0; ((xx < p_result->set_app_val.num_val) && (buf_len > size_needed)); xx++) {
p_app_set[xx].attr_id = *p++;
p_app_set[xx].attr_val = *p++;
if (!avrc_is_valid_player_attrib_value(p_app_set[xx].attr_id, p_app_set[xx].attr_val)) {
status = AVRC_STS_BAD_PARAM;
}
}
if (xx != p_result->set_app_val.num_val) {
AVRC_TRACE_ERROR("AVRC_PDU_SET_PLAYER_APP_VALUE not enough room:%d orig num_val:%d",
xx, p_result->set_app_val.num_val);
p_result->set_app_val.num_val = xx;
}
} else {
AVRC_TRACE_ERROR("AVRC_PDU_SET_PLAYER_APP_VALUE NULL decode buffer or bad len");
status = AVRC_STS_INTERNAL_ERR;
}
break;
case AVRC_PDU_GET_PLAYER_APP_VALUE_TEXT:/* 0x16 */
if (len < 3) {
status = AVRC_STS_INTERNAL_ERR;
} else {
BE_STREAM_TO_UINT8 (p_result->get_app_val_txt.attr_id, p);
if (!AVRC_IS_VALID_ATTRIBUTE(p_result->get_app_val_txt.attr_id)) {
status = AVRC_STS_BAD_PARAM;
} else {
BE_STREAM_TO_UINT8 (p_result->get_app_val_txt.num_val, p);
if ( (len - 2/* attr_id & num_val */) != p_result->get_app_val_txt.num_val) {
status = AVRC_STS_INTERNAL_ERR;
} else {
p_u8 = p_result->get_app_val_txt.vals;
for (xx = 0; xx < p_result->get_app_val_txt.num_val; xx++) {
p_u8[xx] = *p++;
if (!avrc_is_valid_player_attrib_value(p_result->get_app_val_txt.attr_id,
p_u8[xx])) {
status = AVRC_STS_BAD_PARAM;
break;
}
}
}
}
}
break;
case AVRC_PDU_INFORM_DISPLAY_CHARSET: /* 0x17 */
if (len < 3) {
status = AVRC_STS_INTERNAL_ERR;
} else {
BE_STREAM_TO_UINT8 (p_result->inform_charset.num_id, p);
if ( (len - 1/* num_id */) != p_result->inform_charset.num_id * 2) {
status = AVRC_STS_INTERNAL_ERR;
} else {
p_u16 = p_result->inform_charset.charsets;
if (p_result->inform_charset.num_id > AVRC_MAX_CHARSET_SIZE) {
p_result->inform_charset.num_id = AVRC_MAX_CHARSET_SIZE;
}
for (xx = 0; xx < p_result->inform_charset.num_id; xx++) {
BE_STREAM_TO_UINT16 (p_u16[xx], p);
}
}
}
break;
case AVRC_PDU_INFORM_BATTERY_STAT_OF_CT:/* 0x18 */
if (len != 1) {
status = AVRC_STS_INTERNAL_ERR;
} else {
p_result->inform_battery_status.battery_status = *p++;
if (!AVRC_IS_VALID_BATTERY_STATUS(p_result->inform_battery_status.battery_status)) {
status = AVRC_STS_BAD_PARAM;
}
}
break;
case AVRC_PDU_GET_ELEMENT_ATTR: /* 0x20 */
if (len < 9) { /* UID/8 and num_attr/1 */
status = AVRC_STS_INTERNAL_ERR;
} else {
BE_STREAM_TO_UINT32 (u32, p);
BE_STREAM_TO_UINT32 (u32_2, p);
if (u32 == 0 && u32_2 == 0) {
BE_STREAM_TO_UINT8 (p_result->get_elem_attrs.num_attr, p);
if ( (len - 9/* UID/8 and num_attr/1 */) != (p_result->get_elem_attrs.num_attr * 4)) {
status = AVRC_STS_INTERNAL_ERR;
} else {
p_u32 = p_result->get_elem_attrs.attrs;
if (p_result->get_elem_attrs.num_attr > AVRC_MAX_ELEM_ATTR_SIZE) {
p_result->get_elem_attrs.num_attr = AVRC_MAX_ELEM_ATTR_SIZE;
}
for (xx = 0; xx < p_result->get_elem_attrs.num_attr; xx++) {
BE_STREAM_TO_UINT32 (p_u32[xx], p);
}
}
} else {
status = AVRC_STS_NOT_FOUND;
}
}
break;
case AVRC_PDU_GET_PLAY_STATUS: /* 0x30 */
/* no additional parameters */
if (len != 0) {
status = AVRC_STS_INTERNAL_ERR;
}
break;
case AVRC_PDU_REGISTER_NOTIFICATION: /* 0x31 */
if (len != 5) {
status = AVRC_STS_INTERNAL_ERR;
} else {
BE_STREAM_TO_UINT8 (p_result->reg_notif.event_id, p);
BE_STREAM_TO_UINT32 (p_result->reg_notif.param, p);
}
break;
case AVRC_PDU_SET_ABSOLUTE_VOLUME: {
if (len != 1) {
status = AVRC_STS_INTERNAL_ERR;
} else {
BE_STREAM_TO_UINT8 (p_result->volume.volume, p);
p_result->volume.volume &= 0x7F; // remove the top bit
}
break;
}
/* case AVRC_PDU_REQUEST_CONTINUATION_RSP: 0x40 */
/* case AVRC_PDU_ABORT_CONTINUATION_RSP: 0x41 */
default:
status = AVRC_STS_BAD_CMD;
break;
}
return status;
}
/*******************************************************************************
**
** Function AVRC_ParsCommand
**
** Description This function is a superset of AVRC_ParsMetadata to parse the command.
**
** 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_ParsCommand (tAVRC_MSG *p_msg, tAVRC_COMMAND *p_result, UINT8 *p_buf, UINT16 buf_len)
{
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_cmd(&p_msg->vendor, p_result, p_buf, buf_len);
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_ParsCommand() unknown opcode:0x%x", p_msg->hdr.opcode);
break;
}
p_result->cmd.opcode = p_msg->hdr.opcode;
p_result->cmd.status = status;
}
AVRC_TRACE_DEBUG("AVRC_ParsCommand() return status:0x%x", status);
return status;
}
#endif /* (AVRC_METADATA_INCLUDED == TRUE) */
#endif /* #if (defined(AVRC_INCLUDED) && AVRC_INCLUDED == TRUE) */
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