/******************************************************************************
*
* Copyright 2003-2016 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 <base/logging.h>
#include <string.h>
#include "avrc_api.h"
#include "avrc_defs.h"
#include "avrc_int.h"
#include "bt_common.h"
#include "bt_utils.h"
#include "osi/include/osi.h"
/*****************************************************************************
* Global data
****************************************************************************/
#define AVRC_ITEM_PLAYER_IS_VALID(_p_player) \
((_p_player)->name.p_str && \
((_p_player)->major_type & AVRC_MJ_TYPE_INVALID) == 0 && \
((_p_player)->sub_type & AVRC_SUB_TYPE_INVALID) == 0 && \
(((_p_player)->play_status <= AVRC_PLAYSTATE_REV_SEEK) || \
((_p_player)->play_status == AVRC_PLAYSTATE_ERROR)))
/* 17 = item_type(1) + item len(2) + min item (14) */
#define AVRC_MIN_LEN_GET_FOLDER_ITEMS_RSP 17
/*******************************************************************************
*
* Function avrc_bld_get_capability_rsp
*
* Description This function builds the Get Capability response.
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* Otherwise, the error code.
*
******************************************************************************/
static tAVRC_STS avrc_bld_get_capability_rsp(tAVRC_GET_CAPS_RSP* p_rsp,
BT_HDR* p_pkt) {
uint8_t *p_data, *p_start, *p_len, *p_count;
uint16_t len = 0;
uint8_t xx;
uint32_t* p_company_id;
uint8_t* p_event_id;
tAVRC_STS status = AVRC_STS_NO_ERROR;
if (!(AVRC_IS_VALID_CAP_ID(p_rsp->capability_id))) {
AVRC_TRACE_ERROR("%s bad parameter. p_rsp: %x", __func__, p_rsp);
status = AVRC_STS_BAD_PARAM;
return status;
}
AVRC_TRACE_API("%s", __func__);
/* get the existing length, if any, and also the num attributes */
p_start = (uint8_t*)(p_pkt + 1) + p_pkt->offset;
p_data = p_len = p_start + 2; /* pdu + rsvd */
BE_STREAM_TO_UINT16(len, p_data);
UINT8_TO_BE_STREAM(p_data, p_rsp->capability_id);
p_count = p_data;
if (len == 0) {
*p_count = p_rsp->count;
p_data++;
len = 2; /* move past the capability_id and count */
} else {
p_data = p_start + p_pkt->len;
*p_count += p_rsp->count;
}
if (p_rsp->capability_id == AVRC_CAP_COMPANY_ID) {
p_company_id = p_rsp->param.company_id;
for (xx = 0; xx < p_rsp->count; xx++) {
UINT24_TO_BE_STREAM(p_data, p_company_id[xx]);
}
len += p_rsp->count * 3;
} else {
p_event_id = p_rsp->param.event_id;
*p_count = 0;
for (xx = 0; xx < p_rsp->count; xx++) {
if (AVRC_IS_VALID_EVENT_ID(p_event_id[xx])) {
(*p_count)++;
UINT8_TO_BE_STREAM(p_data, p_event_id[xx]);
}
}
len += (*p_count);
}
UINT16_TO_BE_STREAM(p_len, len);
p_pkt->len = (p_data - p_start);
status = AVRC_STS_NO_ERROR;
return status;
}
/*******************************************************************************
*
* Function avrc_bld_list_app_settings_attr_rsp
*
* Description This function builds the List Application Settings Attribute
* response.
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* Otherwise, the error code.
*
******************************************************************************/
static tAVRC_STS avrc_bld_list_app_settings_attr_rsp(
tAVRC_LIST_APP_ATTR_RSP* p_rsp, BT_HDR* p_pkt) {
uint8_t *p_data, *p_start, *p_len, *p_num;
uint16_t len = 0;
uint8_t xx;
AVRC_TRACE_API("%s", __func__);
/* get the existing length, if any, and also the num attributes */
p_start = (uint8_t*)(p_pkt + 1) + p_pkt->offset;
p_data = p_len = p_start + 2; /* pdu + rsvd */
BE_STREAM_TO_UINT16(len, p_data);
p_num = p_data;
if (len == 0) {
/* first time initialize the attribute count */
*p_num = 0;
p_data++;
} else {
p_data = p_start + p_pkt->len;
}
for (xx = 0; xx < p_rsp->num_attr; xx++) {
if (AVRC_IsValidPlayerAttr(p_rsp->attrs[xx])) {
(*p_num)++;
UINT8_TO_BE_STREAM(p_data, p_rsp->attrs[xx]);
}
}
len = *p_num + 1;
UINT16_TO_BE_STREAM(p_len, len);
p_pkt->len = (p_data - p_start);
return AVRC_STS_NO_ERROR;
}
/*******************************************************************************
*
* Function avrc_bld_list_app_settings_values_rsp
*
* Description This function builds the List Application Setting Values
* response.
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* Otherwise, the error code.
*
******************************************************************************/
static tAVRC_STS avrc_bld_list_app_settings_values_rsp(
tAVRC_LIST_APP_VALUES_RSP* p_rsp, BT_HDR* p_pkt) {
uint8_t *p_data, *p_start, *p_len, *p_num;
uint8_t xx;
uint16_t len;
AVRC_TRACE_API("%s", __func__);
p_start = (uint8_t*)(p_pkt + 1) + p_pkt->offset;
p_data = p_len = p_start + 2; /* pdu + rsvd */
/* get the existing length, if any, and also the num attributes */
BE_STREAM_TO_UINT16(len, p_data);
p_num = p_data;
/* first time initialize the attribute count */
if (len == 0) {
*p_num = p_rsp->num_val;
p_data++;
} else {
p_data = p_start + p_pkt->len;
*p_num += p_rsp->num_val;
}
for (xx = 0; xx < p_rsp->num_val; xx++) {
UINT8_TO_BE_STREAM(p_data, p_rsp->vals[xx]);
}
len = *p_num + 1;
UINT16_TO_BE_STREAM(p_len, len);
p_pkt->len = (p_data - p_start);
return AVRC_STS_NO_ERROR;
}
/*******************************************************************************
*
* Function avrc_bld_get_cur_app_setting_value_rsp
*
* Description This function builds the Get Current Application Setting
* Value response.
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* Otherwise, the error code.
*
******************************************************************************/
static tAVRC_STS avrc_bld_get_cur_app_setting_value_rsp(
tAVRC_GET_CUR_APP_VALUE_RSP* p_rsp, BT_HDR* p_pkt) {
uint8_t *p_data, *p_start, *p_len, *p_count;
uint16_t len;
uint8_t xx;
if (!p_rsp->p_vals) {
AVRC_TRACE_ERROR("%s NULL parameter", __func__);
return AVRC_STS_BAD_PARAM;
}
AVRC_TRACE_API("%s", __func__);
/* get the existing length, if any, and also the num attributes */
p_start = (uint8_t*)(p_pkt + 1) + p_pkt->offset;
p_data = p_len = p_start + 2; /* pdu + rsvd */
BE_STREAM_TO_UINT16(len, p_data);
p_count = p_data;
if (len == 0) {
/* first time initialize the attribute count */
*p_count = 0;
p_data++;
} else {
p_data = p_start + p_pkt->len;
}
for (xx = 0; xx < p_rsp->num_val; xx++) {
if (avrc_is_valid_player_attrib_value(p_rsp->p_vals[xx].attr_id,
p_rsp->p_vals[xx].attr_val)) {
(*p_count)++;
UINT8_TO_BE_STREAM(p_data, p_rsp->p_vals[xx].attr_id);
UINT8_TO_BE_STREAM(p_data, p_rsp->p_vals[xx].attr_val);
}
}
len = ((*p_count) << 1) + 1;
UINT16_TO_BE_STREAM(p_len, len);
p_pkt->len = (p_data - p_start);
return AVRC_STS_NO_ERROR;
}
/*******************************************************************************
*
* Function avrc_bld_set_app_setting_value_rsp
*
* Description This function builds the Set Application Setting Value
* response.
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* Otherwise, the error code.
*
******************************************************************************/
static tAVRC_STS avrc_bld_set_app_setting_value_rsp(
UNUSED_ATTR tAVRC_RSP* p_rsp, UNUSED_ATTR BT_HDR* p_pkt) {
/* nothing to be added. */
AVRC_TRACE_API("%s", __func__);
return AVRC_STS_NO_ERROR;
}
/*******************************************************************************
*
* Function avrc_bld_app_setting_text_rsp
*
* Description This function builds the Get Application Settings Attribute
* Text or Get Application Settings Value Text response.
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* Otherwise, the error code.
*
******************************************************************************/
static tAVRC_STS avrc_bld_app_setting_text_rsp(
tAVRC_GET_APP_ATTR_TXT_RSP* p_rsp, BT_HDR* p_pkt) {
uint8_t *p_data, *p_start, *p_len, *p_count;
uint16_t len, len_left;
uint8_t xx;
tAVRC_STS sts = AVRC_STS_NO_ERROR;
uint8_t num_added = 0;
if (!p_rsp->p_attrs) {
AVRC_TRACE_ERROR("%s NULL parameter", __func__);
return AVRC_STS_BAD_PARAM;
}
/* get the existing length, if any, and also the num attributes */
p_start = (uint8_t*)(p_pkt + 1) + p_pkt->offset;
p_data = p_len = p_start + 2; /* pdu + rsvd */
/*
* NOTE: The buffer is allocated within avrc_bld_init_rsp_buffer(), and is
* always of size BT_DEFAULT_BUFFER_SIZE.
*/
len_left = BT_DEFAULT_BUFFER_SIZE - BT_HDR_SIZE - p_pkt->offset - p_pkt->len;
BE_STREAM_TO_UINT16(len, p_data);
p_count = p_data;
if (len == 0) {
*p_count = 0;
p_data++;
} else {
p_data = p_start + p_pkt->len;
}
for (xx = 0; xx < p_rsp->num_attr; xx++) {
if (len_left < (p_rsp->p_attrs[xx].str_len + 4)) {
AVRC_TRACE_ERROR("%s out of room (str_len:%d, left:%d)", __func__, xx,
p_rsp->p_attrs[xx].str_len, len_left);
p_rsp->num_attr = num_added;
sts = AVRC_STS_INTERNAL_ERR;
break;
}
if (!p_rsp->p_attrs[xx].str_len || !p_rsp->p_attrs[xx].p_str) {
AVRC_TRACE_ERROR("%s NULL attr text[%d]", __func__, xx);
continue;
}
UINT8_TO_BE_STREAM(p_data, p_rsp->p_attrs[xx].attr_id);
UINT16_TO_BE_STREAM(p_data, p_rsp->p_attrs[xx].charset_id);
UINT8_TO_BE_STREAM(p_data, p_rsp->p_attrs[xx].str_len);
ARRAY_TO_BE_STREAM(p_data, p_rsp->p_attrs[xx].p_str,
p_rsp->p_attrs[xx].str_len);
(*p_count)++;
num_added++;
}
len = p_data - p_count;
UINT16_TO_BE_STREAM(p_len, len);
p_pkt->len = (p_data - p_start);
return sts;
}
/*******************************************************************************
*
* Function avrc_bld_get_app_setting_attr_text_rsp
*
* Description This function builds the Get Application Setting Attribute
* Text response.
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* Otherwise, the error code.
*
******************************************************************************/
static tAVRC_STS avrc_bld_get_app_setting_attr_text_rsp(
tAVRC_GET_APP_ATTR_TXT_RSP* p_rsp, BT_HDR* p_pkt) {
AVRC_TRACE_API("%s", __func__);
return avrc_bld_app_setting_text_rsp(p_rsp, p_pkt);
}
/*******************************************************************************
*
* Function avrc_bld_get_app_setting_value_text_rsp
*
* Description This function builds the Get Application Setting Value Text
* response.
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* Otherwise, the error code.
*
******************************************************************************/
static tAVRC_STS avrc_bld_get_app_setting_value_text_rsp(
tAVRC_GET_APP_ATTR_TXT_RSP* p_rsp, BT_HDR* p_pkt) {
AVRC_TRACE_API("%s", __func__);
return avrc_bld_app_setting_text_rsp(p_rsp, p_pkt);
}
/*******************************************************************************
*
* Function avrc_bld_inform_charset_rsp
*
* Description This function builds the Inform Displayable Character Set
* response.
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* Otherwise, the error code.
*
******************************************************************************/
static tAVRC_STS avrc_bld_inform_charset_rsp(UNUSED_ATTR tAVRC_RSP* p_rsp,
UNUSED_ATTR BT_HDR* p_pkt) {
/* nothing to be added. */
AVRC_TRACE_API("%s", __func__);
return AVRC_STS_NO_ERROR;
}
/*******************************************************************************
*
* Function avrc_bld_inform_battery_status_rsp
*
* Description This function builds the Inform Battery Status
* response.
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* Otherwise, the error code.
*
******************************************************************************/
static tAVRC_STS avrc_bld_inform_battery_status_rsp(
UNUSED_ATTR tAVRC_RSP* p_rsp, UNUSED_ATTR BT_HDR* p_pkt) {
/* nothing to be added. */
AVRC_TRACE_API("%s", __func__);
return AVRC_STS_NO_ERROR;
}
static void avrc_build_attribute_entries(int num_attrs,
tAVRC_ATTR_ENTRY* p_attrs,
int remaining_buffer_capacity,
uint8_t** pp_data,
uint8_t* p_attribute_count) {
AVRC_TRACE_DEBUG("%s num_attrs: %d, remaining_buffer_capacity: %d", __func__,
num_attrs, remaining_buffer_capacity);
uint8_t* p_data = *pp_data;
/* Fill in the Attribute ID, Character Set, Length and Values */
for (int index = 0; index < num_attrs; index++) {
AVRC_TRACE_DEBUG("%s attr id[%d]: %d", __func__, index,
p_attrs[index].attr_id);
CHECK(AVRC_IS_VALID_MEDIA_ATTRIBUTE(p_attrs[index].attr_id));
if (!p_attrs[index].name.p_str) {
p_attrs[index].name.str_len = 0;
}
/* 8 is the size of attr_id, char set and str_len */
remaining_buffer_capacity -= 8;
if (remaining_buffer_capacity < 0) {
AVRC_TRACE_WARNING(
"%s not enough buffer space for attr_id[%d]: %d,"
" skipping %d attributes",
__func__, index, p_attrs[index].attr_id, num_attrs - index);
break;
}
if (remaining_buffer_capacity < p_attrs[index].name.str_len) {
AVRC_TRACE_WARNING(
"%s not enough buffer space for attr_id[%d]: %d,"
" truncating attribute",
__func__, index, p_attrs[index].attr_id);
p_attrs[index].name.str_len = remaining_buffer_capacity;
remaining_buffer_capacity = 0;
}
remaining_buffer_capacity -= p_attrs[index].name.str_len;
UINT32_TO_BE_STREAM(p_data, p_attrs[index].attr_id);
UINT16_TO_BE_STREAM(p_data, p_attrs[index].name.charset_id);
UINT16_TO_BE_STREAM(p_data, p_attrs[index].name.str_len);
ARRAY_TO_BE_STREAM(p_data, p_attrs[index].name.p_str,
p_attrs[index].name.str_len);
(*p_attribute_count)++;
}
*pp_data = p_data;
AVRC_TRACE_DEBUG("%s filled attributes, remaining_buffer_capacity: %d",
__func__, num_attrs, remaining_buffer_capacity);
}
/*******************************************************************************
*
* Function avrc_bld_get_elem_attrs_rsp
*
* Description This function builds the Get Element Attributes
* response.
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* Otherwise, the error code.
*
******************************************************************************/
static tAVRC_STS avrc_bld_get_elem_attrs_rsp(tAVRC_GET_ATTRS_RSP* p_rsp,
BT_HDR* p_pkt) {
AVRC_TRACE_API("%s", __func__);
if (!p_rsp->p_attrs) {
AVRC_TRACE_ERROR("%s NULL p_attrs", __func__);
return AVRC_STS_BAD_PARAM;
}
/* Figure out how much we have left in current buffer */
int remaining_buffer_capacity =
BT_DEFAULT_BUFFER_SIZE - BT_HDR_SIZE - p_pkt->offset;
if (remaining_buffer_capacity < 5) {
AVRC_TRACE_ERROR("%s not enough buffer for packet header",
remaining_buffer_capacity);
return AVRC_STS_INTERNAL_ERR;
}
/* Get to the beginning of PDU */
uint8_t* p_pdu_start = (uint8_t*)(p_pkt + 1) + p_pkt->offset;
/* Skip PDU ID and Reserved byte to get pointer to Parameter Length */
uint8_t *p_data, *p_parameter_len;
p_data = p_parameter_len = p_pdu_start + 2;
/* Parse parameter length */
uint16_t parameter_len;
BE_STREAM_TO_UINT16(parameter_len, p_data);
/* Get pointer to Attribute Count */
uint8_t* p_attribute_count = p_data;
/* Initialize field values when Parameter Length is 0 */
if (parameter_len == 0) {
*p_attribute_count = 0;
p_data++;
} else {
// TODO: Why do we need this case?
p_data = p_pdu_start + p_pkt->len;
}
remaining_buffer_capacity -= p_data - p_pdu_start;
;
if (remaining_buffer_capacity < 0) {
AVRC_TRACE_ERROR("%s not enough buffer capacity for response");
return AVRC_STS_BAD_PARAM;
}
/* Fill in the Attribute ID, Character Set, Length and Values */
avrc_build_attribute_entries(p_rsp->num_attrs, p_rsp->p_attrs,
remaining_buffer_capacity, &p_data,
p_attribute_count);
parameter_len = p_data - p_attribute_count;
UINT16_TO_BE_STREAM(p_parameter_len, parameter_len);
p_pkt->len = (p_data - p_pdu_start);
return AVRC_STS_NO_ERROR;
}
/*******************************************************************************
*
* Function avrc_bld_get_play_status_rsp
*
* Description This function builds the Get Play Status
* response.
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* Otherwise, the error code.
*
******************************************************************************/
static tAVRC_STS avrc_bld_get_play_status_rsp(tAVRC_GET_PLAY_STATUS_RSP* p_rsp,
BT_HDR* p_pkt) {
uint8_t *p_data, *p_start;
AVRC_TRACE_API("%s", __func__);
p_start = (uint8_t*)(p_pkt + 1) + p_pkt->offset;
p_data = p_start + 2;
/* add fixed lenth - song len(4) + song position(4) + status(1) */
UINT16_TO_BE_STREAM(p_data, 9);
UINT32_TO_BE_STREAM(p_data, p_rsp->song_len);
UINT32_TO_BE_STREAM(p_data, p_rsp->song_pos);
UINT8_TO_BE_STREAM(p_data, p_rsp->play_status);
p_pkt->len = (p_data - p_start);
return AVRC_STS_NO_ERROR;
}
/*******************************************************************************
*
* Function avrc_bld_notify_rsp
*
* Description This function builds the Notification response.
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* Otherwise, the error code.
*
******************************************************************************/
static tAVRC_STS avrc_bld_notify_rsp(tAVRC_REG_NOTIF_RSP* p_rsp,
BT_HDR* p_pkt) {
uint8_t *p_data, *p_start;
uint8_t* p_len;
uint16_t len = 0;
uint8_t xx;
tAVRC_STS status = AVRC_STS_NO_ERROR;
AVRC_TRACE_API("%s event_id %d", __func__, p_rsp->event_id);
p_start = (uint8_t*)(p_pkt + 1) + p_pkt->offset;
p_data = p_len = p_start + 2; /* pdu + rsvd */
p_data += 2;
UINT8_TO_BE_STREAM(p_data, p_rsp->event_id);
switch (p_rsp->event_id) {
case AVRC_EVT_PLAY_STATUS_CHANGE: /* 0x01 */
/* p_rsp->param.play_status >= AVRC_PLAYSTATE_STOPPED is always true */
if ((p_rsp->param.play_status <= AVRC_PLAYSTATE_REV_SEEK) ||
(p_rsp->param.play_status == AVRC_PLAYSTATE_ERROR)) {
UINT8_TO_BE_STREAM(p_data, p_rsp->param.play_status);
len = 2;
} else {
AVRC_TRACE_ERROR("%s bad play state", __func__);
status = AVRC_STS_BAD_PARAM;
}
break;
case AVRC_EVT_TRACK_CHANGE: /* 0x02 */
ARRAY_TO_BE_STREAM(p_data, p_rsp->param.track, AVRC_UID_SIZE);
len = (uint8_t)(AVRC_UID_SIZE + 1);
break;
case AVRC_EVT_TRACK_REACHED_END: /* 0x03 */
case AVRC_EVT_TRACK_REACHED_START: /* 0x04 */
case AVRC_EVT_NOW_PLAYING_CHANGE: /* 0x09 */
case AVRC_EVT_AVAL_PLAYERS_CHANGE: /* 0x0a */
len = 1;
break;
case AVRC_EVT_PLAY_POS_CHANGED: /* 0x05 */
UINT32_TO_BE_STREAM(p_data, p_rsp->param.play_pos);
len = 5;
break;
case AVRC_EVT_BATTERY_STATUS_CHANGE: /* 0x06 */
if (AVRC_IS_VALID_BATTERY_STATUS(p_rsp->param.battery_status)) {
UINT8_TO_BE_STREAM(p_data, p_rsp->param.battery_status);
len = 2;
} else {
AVRC_TRACE_ERROR("%s bad battery status", __func__);
status = AVRC_STS_BAD_PARAM;
}
break;
case AVRC_EVT_SYSTEM_STATUS_CHANGE: /* 0x07 */
if (AVRC_IS_VALID_SYSTEM_STATUS(p_rsp->param.system_status)) {
UINT8_TO_BE_STREAM(p_data, p_rsp->param.system_status);
len = 2;
} else {
AVRC_TRACE_ERROR("%s bad system status", __func__);
status = AVRC_STS_BAD_PARAM;
}
break;
case AVRC_EVT_APP_SETTING_CHANGE: /* 0x08 */
if (p_rsp->param.player_setting.num_attr > AVRC_MAX_APP_SETTINGS)
p_rsp->param.player_setting.num_attr = AVRC_MAX_APP_SETTINGS;
if (p_rsp->param.player_setting.num_attr > 0) {
UINT8_TO_BE_STREAM(p_data, p_rsp->param.player_setting.num_attr);
len = 2;
for (xx = 0; xx < p_rsp->param.player_setting.num_attr; xx++) {
if (avrc_is_valid_player_attrib_value(
p_rsp->param.player_setting.attr_id[xx],
p_rsp->param.player_setting.attr_value[xx])) {
UINT8_TO_BE_STREAM(p_data, p_rsp->param.player_setting.attr_id[xx]);
UINT8_TO_BE_STREAM(p_data,
p_rsp->param.player_setting.attr_value[xx]);
} else {
AVRC_TRACE_ERROR("%s bad player app seeting attribute or value",
__func__);
status = AVRC_STS_BAD_PARAM;
break;
}
len += 2;
}
} else
status = AVRC_STS_BAD_PARAM;
break;
case AVRC_EVT_VOLUME_CHANGE: /* 0x0d */
len = 2;
UINT8_TO_BE_STREAM(p_data, (AVRC_MAX_VOLUME & p_rsp->param.volume));
break;
case AVRC_EVT_ADDR_PLAYER_CHANGE: /* 0x0b */
UINT16_TO_BE_STREAM(p_data, p_rsp->param.addr_player.player_id);
UINT16_TO_BE_STREAM(p_data, p_rsp->param.addr_player.uid_counter);
len = 5;
break;
case AVRC_EVT_UIDS_CHANGE: /* 0x0c */
UINT16_TO_BE_STREAM(p_data, p_rsp->param.uid_counter); /* uid counter */
len = 3;
break;
default:
status = AVRC_STS_BAD_PARAM;
AVRC_TRACE_ERROR("%s unknown event_id", __func__);
}
UINT16_TO_BE_STREAM(p_len, len);
p_pkt->len = (p_data - p_start);
return status;
}
/*******************************************************************************
*
* Function avrc_bld_next_rsp
*
* Description This function builds the Request Continue or Abort
* response.
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* Otherwise, the error code.
*
******************************************************************************/
static tAVRC_STS avrc_bld_next_rsp(tAVRC_NEXT_RSP* p_rsp, BT_HDR* p_pkt) {
uint8_t* p_start = (uint8_t*)(p_pkt + 1) + p_pkt->offset;
uint8_t* p_data = (p_start + 2); /* Skip the pdu and reserved bits */
UINT16_TO_BE_STREAM(p_data, 0x0001); /* only one attribute to be sent */
UINT8_TO_BE_STREAM(p_data, p_rsp->target_pdu);
AVRC_TRACE_API("%s: target_pdu: 0x%02x", __func__, p_rsp->target_pdu);
return AVRC_STS_NO_ERROR;
}
/*****************************************************************************
*
* Function avrc_bld_set_absolute_volume_rsp
*
* Description This function builds the set absolute volume response
*
* Returns AVRC_STS_NO_ERROR, if the response is build successfully
*
*****************************************************************************/
static tAVRC_STS avrc_bld_set_absolute_volume_rsp(uint8_t abs_vol,
BT_HDR* p_pkt) {
AVRC_TRACE_API("%s", __func__);
uint8_t* p_start = (uint8_t*)(p_pkt + 1) + p_pkt->offset;
/* To calculate length */
uint8_t* p_data = p_start + 2;
/* add fixed lenth status(1) */
UINT16_TO_BE_STREAM(p_data, 1);
UINT8_TO_BE_STREAM(p_data, abs_vol);
p_pkt->len = (p_data - p_start);
return AVRC_STS_NO_ERROR;
}
/*******************************************************************************
*
* Function avrc_bld_group_navigation_rsp
*
* Description This function builds the Group Navigation
* response.
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* Otherwise, the error code.
*
******************************************************************************/
tAVRC_STS avrc_bld_group_navigation_rsp(uint16_t navi_id, BT_HDR* p_pkt) {
if (!AVRC_IS_VALID_GROUP(navi_id)) {
AVRC_TRACE_ERROR("%s bad navigation op id: %d", __func__, navi_id);
return AVRC_STS_BAD_PARAM;
}
AVRC_TRACE_API("%s", __func__);
uint8_t* p_data = (uint8_t*)(p_pkt + 1) + p_pkt->offset;
UINT16_TO_BE_STREAM(p_data, navi_id);
p_pkt->len = 2;
return AVRC_STS_NO_ERROR;
}
/*******************************************************************************
*
* Function avrc_bld_rejected_rsp
*
* Description This function builds the General Response response.
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
*
******************************************************************************/
static tAVRC_STS avrc_bld_rejected_rsp(tAVRC_RSP* p_rsp, BT_HDR* p_pkt) {
uint8_t* p_start = (uint8_t*)(p_pkt + 1) + p_pkt->offset;
uint8_t* p_data;
uint8_t opcode = p_rsp->opcode;
AVRC_TRACE_API("%s: status=%d, pdu:x%x, opcode=%x", __func__, p_rsp->status,
p_rsp->pdu, opcode);
if (opcode == AVRC_OP_BROWSE) {
p_data = p_start + 1;
if ((AVRC_PDU_INVALID == *p_start) ||
(avrc_opcode_from_pdu(*p_start) != AVRC_OP_BROWSE)) {
/* if invalid or the given opcode is not recognized as a browsing command
* opcode, */
/* use general reject command */
*p_start = AVRC_PDU_GENERAL_REJECT;
}
} else {
p_data = p_start + 2;
}
AVRC_TRACE_DEBUG("%s pdu:x%x, Opcode:%x", __func__, *p_start, opcode);
UINT16_TO_BE_STREAM(p_data, 1);
UINT8_TO_BE_STREAM(p_data, p_rsp->status);
p_pkt->len = p_data - p_start;
return AVRC_STS_NO_ERROR;
}
/*****************************************************************************
* the following commands are introduced in AVRCP 1.4
****************************************************************************/
/*******************************************************************************
*
* Function avrc_bld_ctrl_status_rsp
*
* Description This function builds the responses with a uint8_t parameter.
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* Otherwise, the error code.
*
******************************************************************************/
static tAVRC_STS avrc_bld_ctrl_status_rsp(tAVRC_RSP* p_rsp, BT_HDR* p_pkt) {
uint8_t* p_start = (uint8_t*)(p_pkt + 1) + p_pkt->offset;
AVRC_TRACE_DEBUG("pdu:x%x", *p_start);
/* To calculate length */
uint8_t* p_data = p_start + 2; /* pdu + rsvd */
/* add fixed lenth - status(1) */
UINT16_TO_BE_STREAM(p_data, 1);
UINT8_TO_BE_STREAM(p_data, p_rsp->status);
p_pkt->len = (p_data - p_start);
return AVRC_STS_NO_ERROR;
}
/*******************************************************************************
*
* Function avrc_bld_set_addr_player_rsp
*
* Description This function builds the Set Addresses Player response.
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* Otherwise, the error code.
*
******************************************************************************/
static tAVRC_STS avrc_bld_set_addr_player_rsp(tAVRC_RSP* p_rsp, BT_HDR* p_pkt) {
AVRC_TRACE_API("%s", __func__);
return avrc_bld_ctrl_status_rsp(p_rsp, p_pkt);
}
/*******************************************************************************
*
* Function avrc_bld_set_browsed_player_rsp
*
* Description This function builds the Set Browsed Player response.
*
* This message goes through the Browsing channel
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* Otherwise, the error code.
*
******************************************************************************/
static tAVRC_STS avrc_bld_set_browsed_player_rsp(tAVRC_SET_BR_PLAYER_RSP* p_rsp,
BT_HDR* p_pkt) {
uint8_t *p_data, *p_start;
uint8_t* p_len;
uint16_t len;
tAVRC_NAME* p_folders = p_rsp->p_folders;
uint16_t len_left;
uint8_t* p_folder_depth;
uint16_t mtu;
/* make sure the given buffer can accomodate this response */
len_left = BT_DEFAULT_BUFFER_SIZE - BT_HDR_SIZE;
p_data = (uint8_t*)(p_pkt + 1);
BE_STREAM_TO_UINT16(mtu, p_data);
if (len_left > mtu) {
len_left = mtu;
}
len_left = len_left - p_pkt->offset - p_pkt->len;
AVRC_TRACE_DEBUG("len_left:%d, mtu:%d ", len_left, mtu);
/* get the existing length, if any, and also the num attributes */
p_start = (uint8_t*)(p_pkt + 1) + p_pkt->offset;
p_data = p_len = p_start + 1; /* pdu */
/* the existing len */
BE_STREAM_TO_UINT16(len, p_data);
/* find the position to add the folder depth.
* 9 is sizeof (status + uid_counter + num_items + charset_id) */
p_folder_depth = p_data + 9;
if (len == 0) {
/* first time initialize the attribute count */
UINT8_TO_BE_STREAM(p_data, p_rsp->status);
UINT16_TO_BE_STREAM(p_data, p_rsp->uid_counter);
UINT32_TO_BE_STREAM(p_data, p_rsp->num_items);
UINT16_TO_BE_STREAM(p_data, p_rsp->charset_id);
*p_folder_depth = 0;
p_data++;
len = 10;
/* assuming that we would never use a buffer that is too small for headers
*/
len_left -= 12;
} else {
p_data = p_start + p_pkt->len;
}
for (uint8_t xx = 0;
(xx < p_rsp->folder_depth) && (len_left > (p_folders[xx].str_len + 2));
xx++) {
(*p_folder_depth)++;
UINT16_TO_BE_STREAM(p_data, p_folders[xx].str_len);
ARRAY_TO_BE_STREAM(p_data, p_folders[xx].p_str, p_folders[xx].str_len);
len += (p_folders[xx].str_len + 2);
}
UINT16_TO_BE_STREAM(p_len, len);
p_pkt->len = (p_data - p_start);
return AVRC_STS_NO_ERROR;
}
/*******************************************************************************
*
* Function avrc_bld_get_folder_items_rsp
*
* Description This function builds the Get Folder Items response.
* The error code is returned in *p_status.
* AVRC_STS_INTERNAL_ERR means no buffers.
* Try again later or with smaller item_count
*
* This message goes through the Browsing channel
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* AVRC_STS_INTERNAL_ERR, if the given buffer does not have
* enough room
* Otherwise, the error code.
*
******************************************************************************/
static tAVRC_STS avrc_bld_get_folder_items_rsp(tAVRC_GET_ITEMS_RSP* p_rsp,
BT_HDR* p_pkt) {
uint8_t *p_data, *p_start;
uint8_t *p_len, xx;
uint16_t len;
uint16_t item_len;
uint8_t *p_item_len, yy;
tAVRC_ITEM_PLAYER* p_player;
tAVRC_ITEM_FOLDER* p_folder;
tAVRC_ITEM_MEDIA* p_media;
tAVRC_ATTR_ENTRY* p_attr;
tAVRC_ITEM* p_item_list = p_rsp->p_item_list;
tAVRC_STS status = AVRC_STS_NO_ERROR;
uint16_t len_left;
uint8_t *p_num, *p;
uint8_t *p_item_start, *p_attr_count;
uint16_t item_count;
uint16_t mtu;
bool multi_items_add_fail = false;
AVRC_TRACE_API("%s", __func__);
/* make sure the given buffer can accomodate this response */
len_left = BT_DEFAULT_BUFFER_SIZE - BT_HDR_SIZE;
p = (uint8_t*)(p_pkt + 1);
BE_STREAM_TO_UINT16(mtu, p);
if (len_left > mtu) len_left = mtu;
len_left = len_left - p_pkt->offset - p_pkt->len;
/* get the existing length, if any, and also the num attributes */
p_start = (uint8_t*)(p_pkt + 1) + p_pkt->offset;
p_data = p_len = p_start + 1; /* pdu */
/* the existing len */
BE_STREAM_TO_UINT16(len, p_data);
p_num = p_data + 3;
if (len == 0) {
/* first time initialize the attribute count */
UINT8_TO_BE_STREAM(p_data, p_rsp->status);
UINT16_TO_BE_STREAM(p_data, p_rsp->uid_counter);
item_count = 0;
p_data += 2;
len = 5;
len_left -= 5;
} else {
p_data = p_start + p_pkt->len;
p = p_num;
BE_STREAM_TO_UINT16(item_count, p);
}
AVRC_TRACE_DEBUG("len:%d, len_left:%d, num:%d", len, len_left, item_count);
/* min len required = item_type(1) + item len(2) + min item (14) = 17 */
for (xx = 0;
xx < p_rsp->item_count && len_left > AVRC_MIN_LEN_GET_FOLDER_ITEMS_RSP &&
!multi_items_add_fail;
xx++) {
p_item_start = p_data;
UINT8_TO_BE_STREAM(p_data, p_item_list[xx].item_type);
/* variable item lenth - save the location to add length */
p_item_len = p_data;
p_data += 2;
item_len = 0;
len_left -= 3; /* item_type(1) + item len(2) */
switch (p_item_list[xx].item_type) {
case AVRC_ITEM_PLAYER:
/* min len required: 2 + 1 + 4 + 1 + 16 + 2 + 2 = 30 + str_len */
p_player = &p_item_list[xx].u.player;
item_len = AVRC_FEATURE_MASK_SIZE + p_player->name.str_len + 12;
if ((len_left <= item_len) || !AVRC_ITEM_PLAYER_IS_VALID(p_player)) {
p_data = p_item_start;
} else {
UINT16_TO_BE_STREAM(p_data, p_player->player_id);
UINT8_TO_BE_STREAM(p_data, p_player->major_type);
UINT32_TO_BE_STREAM(p_data, p_player->sub_type);
UINT8_TO_BE_STREAM(p_data, p_player->play_status);
ARRAY_TO_BE_STREAM(p_data, p_player->features,
AVRC_FEATURE_MASK_SIZE);
UINT16_TO_BE_STREAM(p_data, p_player->name.charset_id);
UINT16_TO_BE_STREAM(p_data, p_player->name.str_len);
ARRAY_TO_BE_STREAM(p_data, p_player->name.p_str,
p_player->name.str_len);
}
break;
case AVRC_ITEM_FOLDER:
/* min len required: 8 + 1 + 1 + 2 + 2 = 14 + str_len */
p_folder = &p_item_list[xx].u.folder;
item_len = AVRC_UID_SIZE + p_folder->name.str_len + 6;
if ((len_left > item_len) && p_folder->name.p_str &&
p_folder->type <= AVRC_FOLDER_TYPE_YEARS) {
ARRAY_TO_BE_STREAM(p_data, p_folder->uid, AVRC_UID_SIZE);
UINT8_TO_BE_STREAM(p_data, p_folder->type);
UINT8_TO_BE_STREAM(p_data, p_folder->playable);
UINT16_TO_BE_STREAM(p_data, p_folder->name.charset_id);
UINT16_TO_BE_STREAM(p_data, p_folder->name.str_len);
ARRAY_TO_BE_STREAM(p_data, p_folder->name.p_str,
p_folder->name.str_len);
} else {
p_data = p_item_start;
}
break;
case AVRC_ITEM_MEDIA:
/* min len required: 8 + 1 + 2 + 2 + 1 = 14 + str_len */
p_media = &p_item_list[xx].u.media;
item_len = AVRC_UID_SIZE + p_media->name.str_len + 6;
if ((len_left >= item_len) && p_media->name.p_str &&
p_media->type <= AVRC_MEDIA_TYPE_VIDEO) {
ARRAY_TO_BE_STREAM(p_data, p_media->uid, AVRC_UID_SIZE);
UINT8_TO_BE_STREAM(p_data, p_media->type);
UINT16_TO_BE_STREAM(p_data, p_media->name.charset_id);
UINT16_TO_BE_STREAM(p_data, p_media->name.str_len);
ARRAY_TO_BE_STREAM(p_data, p_media->name.p_str,
p_media->name.str_len);
p_attr_count = p_data++;
*p_attr_count = 0;
len_left -= item_len;
if (p_media->attr_count > 0) {
p_attr = p_media->p_attr_list;
for (yy = 0; yy < p_media->attr_count; yy++) {
if (p_attr[yy].name.p_str &&
AVRC_IS_VALID_MEDIA_ATTRIBUTE(p_attr[yy].attr_id) &&
(len_left >= (p_attr[yy].name.str_len + 8))) {
(*p_attr_count)++;
UINT32_TO_BE_STREAM(p_data, p_attr[yy].attr_id);
UINT16_TO_BE_STREAM(p_data, p_attr[yy].name.charset_id);
UINT16_TO_BE_STREAM(p_data, p_attr[yy].name.str_len);
ARRAY_TO_BE_STREAM(p_data, p_attr[yy].name.p_str,
p_attr[yy].name.str_len);
item_len += (p_attr[yy].name.str_len + 8);
len_left -= (p_attr[yy].name.str_len + 8);
} else if ((len_left < (p_attr[yy].name.str_len + 8)) &&
item_count > 0) {
p_data = p_item_start;
multi_items_add_fail = TRUE;
break;
}
}
}
} else {
if (len_left < item_len && item_count > 0)
multi_items_add_fail = TRUE;
p_data = p_item_start;
}
break;
} /* switch item_type */
if (p_item_start != p_data) {
/* successfully added the item */
item_count++;
/* fill in variable item lenth */
UINT16_TO_BE_STREAM(p_item_len, item_len);
} else {
if (!multi_items_add_fail) {
/* some item is not added properly - set an error status */
if (len_left < item_len)
status = AVRC_STS_INTERNAL_ERR;
else
status = AVRC_STS_BAD_PARAM;
}
}
if (!multi_items_add_fail) {
len += item_len;
len += 3; /* the item_type(1) and item_len(2) */
}
AVRC_TRACE_DEBUG("len:%d, len_left:%d, num:%d, item_len:%d", len, len_left,
item_count, item_len);
} /* for item_count */
UINT16_TO_BE_STREAM(p_num, item_count);
UINT16_TO_BE_STREAM(p_len, len);
p_pkt->len = (p_data - p_start);
return status;
}
/*******************************************************************************
*
* Function avrc_bld_change_path_rsp
*
* Description This function builds the Change Path response.
*
* This message goes through the Browsing channel
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* Otherwise, the error code.
*
******************************************************************************/
static tAVRC_STS avrc_bld_change_path_rsp(tAVRC_CHG_PATH_RSP* p_rsp,
BT_HDR* p_pkt) {
uint8_t *p_data, *p_start;
/* get the existing length, if any, and also the num attributes */
p_start = (uint8_t*)(p_pkt + 1) + p_pkt->offset;
p_data = p_start + 1; /* pdu */
/* add fixed length - status(1) + num_items(4) */
UINT16_TO_BE_STREAM(p_data, 5);
UINT8_TO_BE_STREAM(p_data, p_rsp->status);
UINT32_TO_BE_STREAM(p_data, p_rsp->num_items);
p_pkt->len = (p_data - p_start);
return AVRC_STS_NO_ERROR;
}
/*******************************************************************************
*
* Function avrc_bld_get_attrs_rsp
*
* Description This function builds the GetItemAttributes response,
*
* The Get Item Attributes message goes through the
* Browsing channel (already specified in the |p_pkt|)
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* AVRC_STS_INTERNAL_ERR, if the given buffer does not have
* enough room
* Otherwise, the error code.
*
******************************************************************************/
static tAVRC_STS avrc_bld_get_item_attrs_rsp(tAVRC_GET_ATTRS_RSP* p_rsp,
BT_HDR* p_pkt) {
AVRC_TRACE_API("%s", __func__);
if (!p_rsp->p_attrs) {
AVRC_TRACE_ERROR("%s NULL p_attrs", __func__);
return AVRC_STS_BAD_PARAM;
}
/* Figure out how much we have left in current buffer */
int remaining_buffer_capacity =
BT_DEFAULT_BUFFER_SIZE - BT_HDR_SIZE - p_pkt->offset;
/* Get to the beginning of data section in buffer */
uint8_t* p_data = (uint8_t*)(p_pkt + 1);
/* Get the MTU size that is filled in earlier */
uint16_t mtu;
BE_STREAM_TO_UINT16(mtu, p_data);
if (remaining_buffer_capacity > mtu) {
remaining_buffer_capacity = mtu;
}
AVRC_TRACE_DEBUG("%s: remaining_buffer_capacity:%d, mtu:%d", __func__,
remaining_buffer_capacity, mtu);
if (remaining_buffer_capacity < 5) {
AVRC_TRACE_ERROR("%s: not enough space for packet header, remaining:%d < 5",
__func__, remaining_buffer_capacity);
return AVRC_STS_INTERNAL_ERR;
}
/* Get to the beginning of PDU */
uint8_t* p_pdu_start = (uint8_t*)(p_pkt + 1) + p_pkt->offset;
/* Skip PDU ID to get pointer to Parameter length */
uint8_t* p_parameter_len;
p_data = p_parameter_len = p_pdu_start + 1;
/* Parse existing parameter length */
uint16_t parameter_len;
BE_STREAM_TO_UINT16(parameter_len, p_data);
/* Skip one byte to Number of Attributes */
uint8_t* p_status = p_data++;
uint8_t* p_attribute_count = p_data++;
if (parameter_len == 0) {
/* First time, initialize the status byte */
*p_status = p_rsp->status;
if (p_rsp->status != AVRC_STS_NO_ERROR) {
// TODO(siyuanh): This is a hack
parameter_len = 1;
UINT16_TO_BE_STREAM(p_parameter_len, parameter_len);
p_pkt->len = p_status - p_pdu_start;
return AVRC_STS_NO_ERROR;
}
*p_attribute_count = 0;
} else {
// TODO(siyuanh): Why do wee need this case?
p_data = p_pdu_start + p_pkt->len;
}
remaining_buffer_capacity -= p_data - p_pdu_start;
/* Fill in the Attribute ID, Character Set, Length and Values */
avrc_build_attribute_entries(p_rsp->num_attrs, p_rsp->p_attrs,
remaining_buffer_capacity, &p_data,
p_attribute_count);
parameter_len = p_data - p_status;
UINT16_TO_BE_STREAM(p_parameter_len, parameter_len);
p_pkt->len = p_data - p_pdu_start;
return AVRC_STS_NO_ERROR;
}
/*******************************************************************************
*
* Function avrc_bld_get_num_of_item_rsp
*
* Description This function builds the Get Total Number of Items response.
*
* This message goes through the Browsing channel
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* AVRC_STS_INTERNAL_ERR, if the given buffer does not have
* enough room
* Otherwise, the error code.
*
******************************************************************************/
static tAVRC_STS avrc_bld_get_num_of_item_rsp(tAVRC_GET_NUM_OF_ITEMS_RSP* p_rsp,
BT_HDR* p_pkt) {
uint8_t *p_data, *p_start, *p_len;
AVRC_TRACE_API("%s", __func__);
/* get the existing length, if any, and also the num attributes */
p_start = (uint8_t*)(p_pkt + 1) + p_pkt->offset;
p_data = p_len = p_start + 1; /* pdu */
if (p_rsp->status == AVRC_STS_NO_ERROR) {
/* add fixed lenth - status(1) + uid_counter(2) + num_items(4) */
UINT16_TO_BE_STREAM(p_data, 7);
UINT8_TO_BE_STREAM(p_data, p_rsp->status);
UINT16_TO_BE_STREAM(p_data, p_rsp->uid_counter);
UINT32_TO_BE_STREAM(p_data, p_rsp->num_items);
p_pkt->len = (p_data - p_start);
return AVRC_STS_NO_ERROR;
} else {
/* add fixed lenth - status(1) */
UINT16_TO_BE_STREAM(p_data, 7);
UINT8_TO_BE_STREAM(p_data, p_rsp->status);
p_pkt->len = (p_data - p_start);
return p_rsp->status;
}
}
/*******************************************************************************
*
* Function avrc_bld_search_rsp
*
* Description This function builds the Search response.
*
* This message goes through the Browsing channel
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* Otherwise, the error code.
*
******************************************************************************/
static tAVRC_STS avrc_bld_search_rsp(tAVRC_SEARCH_RSP* p_rsp, BT_HDR* p_pkt) {
uint8_t *p_data, *p_start, *p_len;
AVRC_TRACE_API("%s", __func__);
/* get the existing length, if any, and also the num attributes */
p_start = (uint8_t*)(p_pkt + 1) + p_pkt->offset;
p_data = p_len = p_start + 1; /* pdu */
/* add fixed lenth - status(1) + uid_counter(2) + num_items(4) */
UINT16_TO_BE_STREAM(p_data, 7);
UINT8_TO_BE_STREAM(p_data, p_rsp->status);
UINT16_TO_BE_STREAM(p_data, p_rsp->uid_counter);
UINT32_TO_BE_STREAM(p_data, p_rsp->num_items);
p_pkt->len = (p_data - p_start);
return AVRC_STS_NO_ERROR;
}
/*******************************************************************************
*
* Function avrc_bld_play_item_rsp
*
* Description This function builds the Play Item response.
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* Otherwise, the error code.
*
******************************************************************************/
static tAVRC_STS avrc_bld_play_item_rsp(tAVRC_RSP* p_rsp, BT_HDR* p_pkt) {
AVRC_TRACE_API("%s", __func__);
return avrc_bld_ctrl_status_rsp(p_rsp, p_pkt);
}
/*******************************************************************************
*
* Function avrc_bld_add_to_now_playing_rsp
*
* Description This function builds the Add to Now Playing response.
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* Otherwise, the error code.
*
******************************************************************************/
static tAVRC_STS avrc_bld_add_to_now_playing_rsp(tAVRC_RSP* p_rsp,
BT_HDR* p_pkt) {
AVRC_TRACE_API("%s", __func__);
return avrc_bld_ctrl_status_rsp(p_rsp, p_pkt);
}
/*******************************************************************************
*
* Function avrc_bld_init_rsp_buffer
*
* Description This function initializes the response buffer based on PDU
*
* Returns NULL, if no buffer or failure to build the message.
* Otherwise, the buffer that contains the initialized message.
*
******************************************************************************/
static BT_HDR* avrc_bld_init_rsp_buffer(tAVRC_RESPONSE* p_rsp) {
uint16_t offset = 0;
uint16_t chnl = AVCT_DATA_CTRL;
uint8_t opcode = avrc_opcode_from_pdu(p_rsp->pdu);
AVRC_TRACE_API("%s: pdu=%x, opcode=%x/%x", __func__, p_rsp->pdu, opcode,
p_rsp->rsp.opcode);
if (opcode != p_rsp->rsp.opcode && p_rsp->rsp.status != AVRC_STS_NO_ERROR &&
avrc_is_valid_opcode(p_rsp->rsp.opcode)) {
opcode = p_rsp->rsp.opcode;
AVRC_TRACE_API("%s opcode=%x", __func__, opcode);
}
switch (opcode) {
case AVRC_OP_BROWSE:
chnl = AVCT_DATA_BROWSE;
offset = AVCT_BROWSE_OFFSET;
break;
case AVRC_OP_PASS_THRU:
offset = AVRC_MSG_PASS_THRU_OFFSET;
break;
case AVRC_OP_VENDOR:
offset = AVRC_MSG_VENDOR_OFFSET;
break;
}
/* allocate and initialize the buffer */
BT_HDR* p_pkt = (BT_HDR*)osi_malloc(BT_DEFAULT_BUFFER_SIZE);
uint8_t *p_data, *p_start;
p_pkt->layer_specific = chnl;
p_pkt->event = opcode;
p_pkt->offset = offset;
p_data = (uint8_t*)(p_pkt + 1) + p_pkt->offset;
p_start = p_data;
/* pass thru - group navigation - has a two byte op_id, so dont do it here */
if (opcode != AVRC_OP_PASS_THRU) *p_data++ = p_rsp->pdu;
switch (opcode) {
case AVRC_OP_VENDOR:
/* reserved 0, packet_type 0 */
UINT8_TO_BE_STREAM(p_data, 0);
/* continue to the next "case to add length */
case AVRC_OP_BROWSE:
/* add fixed lenth - 0 */
UINT16_TO_BE_STREAM(p_data, 0);
break;
}
p_pkt->len = (p_data - p_start);
p_rsp->rsp.opcode = opcode;
return p_pkt;
}
/*******************************************************************************
*
* Function AVRC_BldResponse
*
* Description This function builds the given AVRCP response to the given
* buffer
*
* Returns AVRC_STS_NO_ERROR, if the response is built successfully
* Otherwise, the error code.
*
******************************************************************************/
tAVRC_STS AVRC_BldResponse(uint8_t handle, tAVRC_RESPONSE* p_rsp,
BT_HDR** pp_pkt) {
tAVRC_STS status = AVRC_STS_BAD_PARAM;
BT_HDR* p_pkt;
bool alloc = false;
uint8_t* p;
uint16_t peer_mtu;
if (!p_rsp || !pp_pkt) {
AVRC_TRACE_API("%s Invalid parameters passed. p_rsp=%p, pp_pkt=%p",
__func__, p_rsp, pp_pkt);
return AVRC_STS_BAD_PARAM;
}
if (*pp_pkt == NULL) {
*pp_pkt = avrc_bld_init_rsp_buffer(p_rsp);
if (*pp_pkt == NULL) {
AVRC_TRACE_API("%s Failed to initialize response buffer", __func__);
return AVRC_STS_INTERNAL_ERR;
}
if ((*pp_pkt)->layer_specific == AVCT_DATA_BROWSE) {
p = (uint8_t*)((*pp_pkt) + 1);
peer_mtu = AVCT_GetBrowseMtu(handle) - AVCT_HDR_LEN_SINGLE;
UINT16_TO_BE_STREAM(p, peer_mtu);
}
alloc = true;
}
status = AVRC_STS_NO_ERROR;
p_pkt = *pp_pkt;
AVRC_TRACE_API("%s pdu=%x status=%x", __func__, p_rsp->rsp.pdu,
p_rsp->rsp.status);
if (p_rsp->rsp.status != AVRC_STS_NO_ERROR) {
return (avrc_bld_rejected_rsp(&p_rsp->rsp, p_pkt));
}
switch (p_rsp->pdu) {
case AVRC_PDU_NEXT_GROUP:
case AVRC_PDU_PREV_GROUP:
status = avrc_bld_group_navigation_rsp(p_rsp->pdu, p_pkt);
break;
case AVRC_PDU_GET_CAPABILITIES:
status = avrc_bld_get_capability_rsp(&p_rsp->get_caps, p_pkt);
break;
case AVRC_PDU_LIST_PLAYER_APP_ATTR:
status =
avrc_bld_list_app_settings_attr_rsp(&p_rsp->list_app_attr, p_pkt);
break;
case AVRC_PDU_LIST_PLAYER_APP_VALUES:
status =
avrc_bld_list_app_settings_values_rsp(&p_rsp->list_app_values, p_pkt);
break;
case AVRC_PDU_GET_CUR_PLAYER_APP_VALUE:
status = avrc_bld_get_cur_app_setting_value_rsp(&p_rsp->get_cur_app_val,
p_pkt);
break;
case AVRC_PDU_SET_PLAYER_APP_VALUE:
status = avrc_bld_set_app_setting_value_rsp(&p_rsp->set_app_val, p_pkt);
break;
case AVRC_PDU_GET_PLAYER_APP_ATTR_TEXT:
status = avrc_bld_get_app_setting_attr_text_rsp(&p_rsp->get_app_attr_txt,
p_pkt);
break;
case AVRC_PDU_GET_PLAYER_APP_VALUE_TEXT:
status = avrc_bld_get_app_setting_value_text_rsp(&p_rsp->get_app_val_txt,
p_pkt);
break;
case AVRC_PDU_INFORM_DISPLAY_CHARSET:
status = avrc_bld_inform_charset_rsp(&p_rsp->inform_charset, p_pkt);
break;
case AVRC_PDU_INFORM_BATTERY_STAT_OF_CT:
status = avrc_bld_inform_battery_status_rsp(&p_rsp->inform_battery_status,
p_pkt);
break;
case AVRC_PDU_GET_ELEMENT_ATTR:
status = avrc_bld_get_elem_attrs_rsp(&p_rsp->get_attrs, p_pkt);
break;
case AVRC_PDU_GET_PLAY_STATUS:
status = avrc_bld_get_play_status_rsp(&p_rsp->get_play_status, p_pkt);
break;
case AVRC_PDU_REGISTER_NOTIFICATION:
status = avrc_bld_notify_rsp(&p_rsp->reg_notif, p_pkt);
break;
case AVRC_PDU_REQUEST_CONTINUATION_RSP:
status = avrc_bld_next_rsp(&p_rsp->continu, p_pkt);
break;
case AVRC_PDU_ABORT_CONTINUATION_RSP:
status = avrc_bld_next_rsp(&p_rsp->abort, p_pkt);
break;
case AVRC_PDU_SET_ADDRESSED_PLAYER:
status = avrc_bld_set_addr_player_rsp(&p_rsp->addr_player, p_pkt);
break;
case AVRC_PDU_PLAY_ITEM:
status = avrc_bld_play_item_rsp(&p_rsp->play_item, p_pkt);
break;
case AVRC_PDU_SET_ABSOLUTE_VOLUME:
status = avrc_bld_set_absolute_volume_rsp(p_rsp->volume.volume, p_pkt);
break;
case AVRC_PDU_ADD_TO_NOW_PLAYING:
status = avrc_bld_add_to_now_playing_rsp(&p_rsp->add_to_play, p_pkt);
break;
case AVRC_PDU_SET_BROWSED_PLAYER:
status = avrc_bld_set_browsed_player_rsp(&p_rsp->br_player, p_pkt);
break;
case AVRC_PDU_GET_FOLDER_ITEMS:
status = avrc_bld_get_folder_items_rsp(&p_rsp->get_items, p_pkt);
break;
case AVRC_PDU_CHANGE_PATH:
status = avrc_bld_change_path_rsp(&p_rsp->chg_path, p_pkt);
break;
case AVRC_PDU_GET_ITEM_ATTRIBUTES:
status = avrc_bld_get_item_attrs_rsp(&p_rsp->get_attrs, p_pkt);
break;
case AVRC_PDU_GET_TOTAL_NUM_OF_ITEMS:
status = avrc_bld_get_num_of_item_rsp(&p_rsp->get_num_of_items, p_pkt);
break;
case AVRC_PDU_SEARCH:
status = avrc_bld_search_rsp(&p_rsp->search, p_pkt);
break;
}
if (alloc && (status != AVRC_STS_NO_ERROR)) {
osi_free(p_pkt);
*pp_pkt = NULL;
}
AVRC_TRACE_API("%s returning %d", __func__, status);
return status;
}