blob: 640c5794df3c5eed63268ef493a0e73f163900ba (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/*
* Asterisk -- A telephony toolkit for Linux.
*
* Translate via the use of pseudo channels
*
* Copyright (C) 1999, Mark Spencer
*
* Mark Spencer <markster@linux-support.net>
*
* This program is free software, distributed under the terms of
* the GNU General Public License
*/
#ifndef _ASTERISK_TRANSLATE_H
#define _ASTERISK_TRANSLATE_H
#define MAX_FORMAT 32
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
#include <asterisk/frame.h>
/* Declared by individual translators */
struct ast_translator_pvt;
struct ast_translator {
char name[80];
int srcfmt;
int dstfmt;
struct ast_translator_pvt *(*new)(void);
int (*framein)(struct ast_translator_pvt *pvt, struct ast_frame *in);
struct ast_frame * (*frameout)(struct ast_translator_pvt *pvt);
void (*destroy)(struct ast_translator_pvt *pvt);
/* For performance measurements */
/* Generate an example frame */
struct ast_frame * (*sample)(void);
/* Cost in milliseconds for encoding/decoding 1 second of sound */
int cost;
/* For linking, not to be modified by the translator */
struct ast_translator *next;
};
struct ast_trans_pvt;
/* Register a Codec translator */
extern int ast_register_translator(struct ast_translator *t);
/* Unregister same */
extern int ast_unregister_translator(struct ast_translator *t);
/* Given a list of sources, and a designed destination format, which should
I choose? Returns 0 on success, -1 if no path could be found. Modifies
dests and srcs in place */
extern int ast_translator_best_choice(int *dsts, int *srcs);
/* Build a path (possibly NULL) from source to dest */
extern struct ast_trans_pvt *ast_translator_build_path(int dest, int source);
extern void ast_translator_free_path(struct ast_trans_pvt *tr);
/* Apply an input frame into the translator and receive zero or one output frames. Consume
determines whether the original frame should be freed */
extern struct ast_frame *ast_translate(struct ast_trans_pvt *tr, struct ast_frame *f, int consume);
#if defined(__cplusplus) || defined(c_plusplus)
}
#endif
#endif
|