stack/avrc/avrc_pars_tg.c

   1 /******************************************************************************
   2  *
   3  *  Copyright (C) 2003-2013 Broadcom Corporation
   4  *
   5  *  Licensed under the Apache License, Version 2.0 (the "License");
   6  *  you may not use this file except in compliance with the License.
   7  *  You may obtain a copy of the License at:
   8  *
   9  *  http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  *  Unless required by applicable law or agreed to in writing, software
  12  *  distributed under the License is distributed on an "AS IS" BASIS,
  13  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  *  See the License for the specific language governing permissions and
  15  *  limitations under the License.
  16  *
  17  ******************************************************************************/
  18 #include <string.h>
  19
  20 #include "gki.h"
  21 #include "avrc_api.h"
  22 #include "avrc_defs.h"
  23 #include "avrc_int.h"
  24
  25 /*****************************************************************************
  26 **  Global data
  27 *****************************************************************************/
  28 #if (AVRC_METADATA_INCLUDED == TRUE)
  29
  30 /*******************************************************************************
  31 **
  32 ** Function         avrc_pars_vendor_cmd
  33 **
  34 ** Description      This function parses the vendor specific commands defined by
  35 **                  Bluetooth SIG
  36 **
  37 ** Returns          AVRC_STS_NO_ERROR, if the message in p_data is parsed successfully.
  38 **                  Otherwise, the error code defined by AVRCP 1.4
  39 **
  40 *******************************************************************************/
  41 static tAVRC_STS avrc_pars_vendor_cmd(tAVRC_MSG_VENDOR *p_msg, tAVRC_COMMAND *p_result,
  42                                       UINT8 *p_buf, UINT16 buf_len)
  43 {
  44     tAVRC_STS  status = AVRC_STS_NO_ERROR;
  45     UINT8   *p = p_msg->p_vendor_data;
  46     UINT16  len;
  47     UINT8   xx, yy;
  48     UINT8   *p_u8;
  49     UINT16  *p_u16;
  50     UINT32  u32, u32_2, *p_u32;
  51     tAVRC_APP_SETTING       *p_app_set;
  52     UINT16  size_needed;
  53
  54     p_result->pdu = *p++;
  55     AVRC_TRACE_DEBUG("avrc_pars_vendor_cmd() pdu:0x%x", p_result->pdu);
  56     if (!AVRC_IsValidAvcType (p_result->pdu, p_msg->hdr.ctype))
  57     {
  58         AVRC_TRACE_DEBUG("avrc_pars_vendor_cmd() detects wrong AV/C type!");
  59         status = AVRC_STS_BAD_CMD;
  60     }
  61
  62     p++; /* skip the reserved byte */
  63     BE_STREAM_TO_UINT16 (len, p);
  64     if ((len+4) != (p_msg->vendor_len))
  65     {
  66         status = AVRC_STS_INTERNAL_ERR;
  67     }
  68
  69     if (status != AVRC_STS_NO_ERROR)
  70         return status;
  71
  72     switch (p_result->pdu)
  73     {
  74     case AVRC_PDU_GET_CAPABILITIES:         /* 0x10 */
  75         p_result->get_caps.capability_id = *p++;
  76         if (!AVRC_IS_VALID_CAP_ID(p_result->get_caps.capability_id))
  77             status = AVRC_STS_BAD_PARAM;
  78         else if (len != 1)
  79             status = AVRC_STS_INTERNAL_ERR;
  80         break;
  81
  82     case AVRC_PDU_LIST_PLAYER_APP_ATTR:     /* 0x11 */
  83         /* no additional parameters */
  84         if (len != 0)
  85             status = AVRC_STS_INTERNAL_ERR;
  86         break;
  87
  88     case AVRC_PDU_LIST_PLAYER_APP_VALUES:   /* 0x12 */
  89         p_result->list_app_values.attr_id = *p++;
  90         if (!AVRC_IS_VALID_ATTRIBUTE(p_result->list_app_values.attr_id))
  91             status = AVRC_STS_BAD_PARAM;
  92         else if (len != 1)
  93             status = AVRC_STS_INTERNAL_ERR;
  94         break;
  95
  96     case AVRC_PDU_GET_CUR_PLAYER_APP_VALUE: /* 0x13 */
  97     case AVRC_PDU_GET_PLAYER_APP_ATTR_TEXT: /* 0x15 */
  98         BE_STREAM_TO_UINT8 (p_result->get_cur_app_val.num_attr, p);
  99         if (len != (p_result->get_cur_app_val.num_attr+1))
 100         {
 101             status = AVRC_STS_INTERNAL_ERR;
 102             break;
 103         }
 104         p_u8 = p_result->get_cur_app_val.attrs;
 105         for (xx=0, yy=0; xx< p_result->get_cur_app_val.num_attr; xx++)
 106         {
 107             /* only report the valid player app attributes */
 108             if (AVRC_IsValidPlayerAttr(*p))
 109                 p_u8[yy++] = *p;
 110             p++;
 111         }
 112         p_result->get_cur_app_val.num_attr = yy;
 113         if (yy == 0)
 114         {
 115             status = AVRC_STS_BAD_PARAM;
 116         }
 117         break;
 118
 119     case AVRC_PDU_SET_PLAYER_APP_VALUE:     /* 0x14 */
 120         BE_STREAM_TO_UINT8 (p_result->set_app_val.num_val, p);
 121         size_needed = sizeof(tAVRC_APP_SETTING);
 122         if (p_buf && (len == ((p_result->set_app_val.num_val<<1) + 1)))
 123         {
 124             p_result->set_app_val.p_vals = (tAVRC_APP_SETTING *)p_buf;
 125             p_app_set = p_result->set_app_val.p_vals;
 126             for (xx=0; ((xx< p_result->set_app_val.num_val) && (buf_len > size_needed)); xx++)
 127             {
 128                 p_app_set[xx].attr_id = *p++;
 129                 p_app_set[xx].attr_val = *p++;
 130                 if (!avrc_is_valid_player_attrib_value(p_app_set[xx].attr_id, p_app_set[xx].attr_val))
 131                     status = AVRC_STS_BAD_PARAM;
 132             }
 133             if (xx != p_result->set_app_val.num_val)
 134             {
 135                 AVRC_TRACE_ERROR("AVRC_PDU_SET_PLAYER_APP_VALUE not enough room:%d orig num_val:%d",
 136                     xx, p_result->set_app_val.num_val);
 137                 p_result->set_app_val.num_val = xx;
 138             }
 139         }
 140         else
 141         {
 142             AVRC_TRACE_ERROR("AVRC_PDU_SET_PLAYER_APP_VALUE NULL decode buffer or bad len");
 143             status = AVRC_STS_INTERNAL_ERR;
 144         }
 145         break;
 146
 147     case AVRC_PDU_GET_PLAYER_APP_VALUE_TEXT:/* 0x16 */
 148         if (len < 3)
 149             status = AVRC_STS_INTERNAL_ERR;
 150         else
 151         {
 152             BE_STREAM_TO_UINT8 (p_result->get_app_val_txt.attr_id, p);
 153             if (!AVRC_IS_VALID_ATTRIBUTE(p_result->get_app_val_txt.attr_id))
 154                 status = AVRC_STS_BAD_PARAM;
 155             else
 156             {
 157                 BE_STREAM_TO_UINT8 (p_result->get_app_val_txt.num_val, p);
 158                 if ( (len - 2/* attr_id & num_val */) != p_result->get_app_val_txt.num_val)
 159                     status = AVRC_STS_INTERNAL_ERR;
 160                 else
 161                 {
 162                     p_u8 = p_result->get_app_val_txt.vals;
 163                     for (xx=0; xx< p_result->get_app_val_txt.num_val; xx++)
 164                     {
 165                         p_u8[xx] = *p++;
 166                         if (!avrc_is_valid_player_attrib_value(p_result->get_app_val_txt.attr_id,
 167                             p_u8[xx]))
 168                         {
 169                             status = AVRC_STS_BAD_PARAM;
 170                             break;
 171                         }
 172                     }
 173                 }
 174             }
 175         }
 176         break;
 177
 178     case AVRC_PDU_INFORM_DISPLAY_CHARSET:  /* 0x17 */
 179         if (len < 3)
 180             status = AVRC_STS_INTERNAL_ERR;
 181         else
 182         {
 183             BE_STREAM_TO_UINT8 (p_result->inform_charset.num_id, p);
 184             if ( (len - 1/* num_id */) != p_result->inform_charset.num_id * 2)
 185                 status = AVRC_STS_INTERNAL_ERR;
 186             else
 187             {
 188                 p_u16 = p_result->inform_charset.charsets;
 189                 if (p_result->inform_charset.num_id > AVRC_MAX_CHARSET_SIZE)
 190                     p_result->inform_charset.num_id = AVRC_MAX_CHARSET_SIZE;
 191                 for (xx=0; xx< p_result->inform_charset.num_id; xx++)
 192                 {
 193                     BE_STREAM_TO_UINT16 (p_u16[xx], p);
 194                 }
 195             }
 196         }
 197         break;
 198
 199     case AVRC_PDU_INFORM_BATTERY_STAT_OF_CT:/* 0x18 */
 200         if (len != 1)
 201             status = AVRC_STS_INTERNAL_ERR;
 202         else
 203         {
 204             p_result->inform_battery_status.battery_status = *p++;
 205             if (!AVRC_IS_VALID_BATTERY_STATUS(p_result->inform_battery_status.battery_status))
 206                 status = AVRC_STS_BAD_PARAM;
 207         }
 208         break;
 209
 210     case AVRC_PDU_GET_ELEMENT_ATTR:         /* 0x20 */
 211         if (len < 9) /* UID/8 and num_attr/1 */
 212             status = AVRC_STS_INTERNAL_ERR;
 213         else
 214         {
 215             BE_STREAM_TO_UINT32 (u32, p);
 216             BE_STREAM_TO_UINT32 (u32_2, p);
 217             if (u32== 0 && u32_2 == 0)
 218             {
 219                 BE_STREAM_TO_UINT8 (p_result->get_elem_attrs.num_attr, p);
 220                 if ( (len - 9/* UID/8 and num_attr/1 */) != (p_result->get_elem_attrs.num_attr * 4))
 221                     status = AVRC_STS_INTERNAL_ERR;
 222                 else
 223                 {
 224                     p_u32 = p_result->get_elem_attrs.attrs;
 225                     if (p_result->get_elem_attrs.num_attr > AVRC_MAX_ELEM_ATTR_SIZE)
 226                         p_result->get_elem_attrs.num_attr = AVRC_MAX_ELEM_ATTR_SIZE;
 227                     for (xx=0; xx< p_result->get_elem_attrs.num_attr; xx++)
 228                     {
 229                         BE_STREAM_TO_UINT32 (p_u32[xx], p);
 230                     }
 231                 }
 232             }
 233             else
 234                 status = AVRC_STS_NOT_FOUND;
 235         }
 236         break;
 237
 238     case AVRC_PDU_GET_PLAY_STATUS:          /* 0x30 */
 239         /* no additional parameters */
 240         if (len != 0)
 241             status = AVRC_STS_INTERNAL_ERR;
 242         break;
 243
 244     case AVRC_PDU_REGISTER_NOTIFICATION:    /* 0x31 */
 245         if (len != 5)
 246             status = AVRC_STS_INTERNAL_ERR;
 247         else
 248         {
 249             BE_STREAM_TO_UINT8 (p_result->reg_notif.event_id, p);
 250             BE_STREAM_TO_UINT32 (p_result->reg_notif.param, p);
 251         }
 252         break;
 253
 254     case AVRC_PDU_SET_ABSOLUTE_VOLUME:
 255     {
 256         if(len!=1)
 257             status = AVRC_STS_INTERNAL_ERR;
 258         break;
 259     }
 260
 261     /* case AVRC_PDU_REQUEST_CONTINUATION_RSP: 0x40 */
 262     /* case AVRC_PDU_ABORT_CONTINUATION_RSP:   0x41 */
 263
 264     default:
 265         status = AVRC_STS_BAD_CMD;
 266         break;
 267     }
 268
 269     return status;
 270 }
 271
 272 /*******************************************************************************
 273 **
 274 ** Function         AVRC_ParsCommand
 275 **
 276 ** Description      This function is a superset of AVRC_ParsMetadata to parse the command.
 277 **
 278 ** Returns          AVRC_STS_NO_ERROR, if the message in p_data is parsed successfully.
 279 **                  Otherwise, the error code defined by AVRCP 1.4
 280 **
 281 *******************************************************************************/
 282 tAVRC_STS AVRC_ParsCommand (tAVRC_MSG *p_msg, tAVRC_COMMAND *p_result, UINT8 *p_buf, UINT16 buf_len)
 283 {
 284     tAVRC_STS  status = AVRC_STS_INTERNAL_ERR;
 285     UINT16  id;
 286
 287     if (p_msg && p_result)
 288     {
 289         switch (p_msg->hdr.opcode)
 290         {
 291         case AVRC_OP_VENDOR:     /*  0x00    Vendor-dependent commands */
 292             status = avrc_pars_vendor_cmd(&p_msg->vendor, p_result, p_buf, buf_len);
 293             break;
 294
 295         case AVRC_OP_PASS_THRU:  /*  0x7C    panel subunit opcode */
 296             status = avrc_pars_pass_thru(&p_msg->pass, &id);
 297             if (status == AVRC_STS_NO_ERROR)
 298             {
 299                 p_result->pdu = (UINT8)id;
 300             }
 301             break;
 302
 303         default:
 304             AVRC_TRACE_ERROR("AVRC_ParsCommand() unknown opcode:0x%x", p_msg->hdr.opcode);
 305             break;
 306         }
 307         p_result->cmd.opcode = p_msg->hdr.opcode;
 308         p_result->cmd.status = status;
 309     }
 310     AVRC_TRACE_DEBUG("AVRC_ParsCommand() return status:0x%x", status);
 311     return status;
 312 }
 313
 314 #endif /* (AVRC_METADATA_INCLUDED == TRUE) */
 315