Asterisk.org: Developer Documentation (28 Oct 2009)

Wed Oct 28 15:47:56 2009

## Asterisk developer's documentation

# transcap.h

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    00001 /*
    00002  * Asterisk -- An open source telephony toolkit.
    00003  *
    00004  * Copyright (C) 1999 - 2005, Digium, Inc.
    00005  *
    00006  * Matthew Fredrickson <creslin@digium.com>
    00007  *
    00008  * See http://www.asterisk.org for more information about
    00009  * the Asterisk project. Please do not directly contact
    00010  * any of the maintainers of this project for assistance;
    00011  * the project provides a web site, mailing lists and IRC
    00012  * channels for your use.
    00013  *
    00014  * This program is free software, distributed under the terms of
    00015  * the GNU General Public License Version 2. See the LICENSE file
    00016  * at the top of the source tree.
    00017  */
    00018
    00019 /*! \file
    00020  * \brief General Asterisk channel transcoding definitions.
    00021  */
    00022
    00023 #ifndef _ASTERISK_TRANSCAP_H
    00024 #define _ASTERISK_TRANSCAP_H
    00025
    00026 /* These definitions are taken directly out of libpri.h and used here.
    00027  * DO NOT change them as it will cause unexpected behavior in channels
    00028  * that utilize these fields.
    00029  */
    00030
    00031 #define AST_TRANS_CAP_SPEECH           0x0
    00032 #define AST_TRANS_CAP_DIGITAL          0x08
    00033 #define AST_TRANS_CAP_RESTRICTED_DIGITAL     0x09
    00034 #define AST_TRANS_CAP_3_1K_AUDIO       0x10
    00035 #define AST_TRANS_CAP_7K_AUDIO            0x11  /* Depriciated ITU Q.931 (05/1998)*/
    00036 #define AST_TRANS_CAP_DIGITAL_W_TONES        0x11
    00037 #define AST_TRANS_CAP_VIDEO            0x18
    00038
    00039 #define IS_DIGITAL(cap)\
    00040    (cap) & AST_TRANS_CAP_DIGITAL ? 1 : 0
    00041
    00042 #endif /* _ASTERISK_TRANSCAP_H */