audio/avctp.h

   1 /*
   2  *
   3  *  BlueZ - Bluetooth protocol stack for Linux
   4  *
   5  *  Copyright (C) 2006-2010  Nokia Corporation
   6  *  Copyright (C) 2004-2010  Marcel Holtmann <marcel@holtmann.org>
   7  *
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  22  *
  23  */
  24
  25 #define AVCTP_PSM 23
  26
  27 #define AVC_MTU 512
  28 #define AVC_HEADER_LENGTH 3
  29
  30 /* ctype entries */
  31 #define AVC_CTYPE_CONTROL               0x0
  32 #define AVC_CTYPE_STATUS                0x1
  33 #define AVC_CTYPE_NOTIFY                0x3
  34 #define AVC_CTYPE_NOT_IMPLEMENTED       0x8
  35 #define AVC_CTYPE_ACCEPTED              0x9
  36 #define AVC_CTYPE_REJECTED              0xA
  37 #define AVC_CTYPE_STABLE                0xC
  38 #define AVC_CTYPE_CHANGED               0xD
  39 #define AVC_CTYPE_INTERIM               0xF
  40
  41 /* opcodes */
  42 #define AVC_OP_VENDORDEP                0x00
  43 #define AVC_OP_UNITINFO                 0x30
  44 #define AVC_OP_SUBUNITINFO              0x31
  45 #define AVC_OP_PASSTHROUGH              0x7c
  46
  47 /* subunits of interest */
  48 #define AVC_SUBUNIT_PANEL               0x09
  49
  50 /* operands in passthrough commands */
  51 #define VOL_UP_OP                       0x41
  52 #define VOL_DOWN_OP                     0x42
  53 #define MUTE_OP                         0x43
  54 #define PLAY_OP                         0x44
  55 #define STAVC_OP_OP                     0x45
  56 #define PAUSE_OP                        0x46
  57 #define RECORD_OP                       0x47
  58 #define REWIND_OP                       0x48
  59 #define FAST_FORWARD_OP                 0x49
  60 #define EJECT_OP                        0x4a
  61 #define FORWARD_OP                      0x4b
  62 #define BACKWARD_OP                     0x4c
  63
  64 struct avctp;
  65
  66 typedef enum {
  67         AVCTP_STATE_DISCONNECTED = 0,
  68         AVCTP_STATE_CONNECTING,
  69         AVCTP_STATE_CONNECTED
  70 } avctp_state_t;
  71
  72 typedef void (*avctp_state_cb) (struct audio_device *dev,
  73                                 avctp_state_t old_state,
  74                                 avctp_state_t new_state,
  75                                 void *user_data);
  76
  77 typedef size_t (*avctp_pdu_cb) (struct avctp *session, uint8_t transaction,
  78                                         uint8_t *code, uint8_t *subunit,
  79                                         uint8_t *operands, size_t operand_count,
  80                                         void *user_data);
  81
  82 unsigned int avctp_add_state_cb(avctp_state_cb cb, void *user_data);
  83 gboolean avctp_remove_state_cb(unsigned int id);
  84
  85 int avctp_register(const bdaddr_t *src, gboolean master);
  86 void avctp_unregister(const bdaddr_t *src);
  87
  88 struct avctp *avctp_connect(const bdaddr_t *src, const bdaddr_t *dst);
  89 struct avctp *avctp_get(const bdaddr_t *src, const bdaddr_t *dst);
  90 void avctp_disconnect(struct avctp *session);
  91
  92 unsigned int avctp_register_pdu_handler(uint8_t opcode, avctp_pdu_cb cb,
  93                                                         void *user_data);
  94 gboolean avctp_unregister_pdu_handler(unsigned int id);
  95
  96 int avctp_send_passthrough(struct avctp *session, uint8_t op);
  97 int avctp_send_vendordep(struct avctp *session, uint8_t transaction,
  98                                 uint8_t code, uint8_t subunit,
  99                                 uint8_t *operands, size_t operand_count);