Asterisk - The Open Source Telephony Project GIT-master-2de1a68
Macros | Functions | Variables
format_vox.c File Reference

Flat, binary, ADPCM vox file format. More...

#include "asterisk.h"
#include "asterisk/mod_format.h"
#include "asterisk/module.h"
#include "asterisk/endian.h"
#include "asterisk/format_cache.h"
Include dependency graph for format_vox.c:

Go to the source code of this file.

Macros

#define BUF_SIZE   80 /* 80 bytes, 160 samples */
 
#define VOX_SAMPLES   160
 

Functions

static void __reg_module (void)
 
static void __unreg_module (void)
 
struct ast_moduleAST_MODULE_SELF_SYM (void)
 
static int load_module (void)
 
static int unload_module (void)
 
static struct ast_framevox_read (struct ast_filestream *s, int *whennext)
 
static int vox_seek (struct ast_filestream *fs, off_t sample_offset, int whence)
 
static off_t vox_tell (struct ast_filestream *fs)
 
static int vox_trunc (struct ast_filestream *fs)
 
static int vox_write (struct ast_filestream *s, struct ast_frame *f)
 

Variables

static struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Dialogic VOX (ADPCM) File Format" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = AST_BUILDOPT_SUM, .support_level = AST_MODULE_SUPPORT_EXTENDED, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND }
 
static const struct ast_module_infoast_module_info = &__mod_info
 
static struct ast_format_def vox_f
 

Detailed Description

Flat, binary, ADPCM vox file format.

Definition in file format_vox.c.

Macro Definition Documentation

◆ BUF_SIZE

#define BUF_SIZE   80 /* 80 bytes, 160 samples */

Definition at line 38 of file format_vox.c.

◆ VOX_SAMPLES

#define VOX_SAMPLES   160

Definition at line 39 of file format_vox.c.

Function Documentation

◆ __reg_module()

static void __reg_module ( void  )
static

Definition at line 158 of file format_vox.c.

◆ __unreg_module()

static void __unreg_module ( void  )
static

Definition at line 158 of file format_vox.c.

◆ AST_MODULE_SELF_SYM()

struct ast_module * AST_MODULE_SELF_SYM ( void  )

Definition at line 158 of file format_vox.c.

◆ load_module()

static int load_module ( void  )
static

Definition at line 140 of file format_vox.c.

141{
146}
struct ast_format * ast_format_adpcm
Built-in cached adpcm format.
Definition: format_cache.c:101
static struct ast_format_def vox_f
Definition: format_vox.c:128
#define ast_format_def_register(f)
Definition: mod_format.h:136
@ AST_MODULE_LOAD_SUCCESS
Definition: module.h:70
@ AST_MODULE_LOAD_DECLINE
Module has failed to load, may be in an inconsistent state.
Definition: module.h:78
struct ast_format * format
Definition: mod_format.h:48

References ast_format_adpcm, ast_format_def_register, AST_MODULE_LOAD_DECLINE, AST_MODULE_LOAD_SUCCESS, ast_format_def::format, and vox_f.

◆ unload_module()

static int unload_module ( void  )
static

Definition at line 148 of file format_vox.c.

149{
151}
int ast_format_def_unregister(const char *name)
Unregisters a file format.
Definition: file.c:162
char name[80]
Definition: mod_format.h:44

References ast_format_def_unregister(), ast_format_def::name, and vox_f.

◆ vox_read()

static struct ast_frame * vox_read ( struct ast_filestream s,
int *  whennext 
)
static

Definition at line 41 of file format_vox.c.

42{
43 size_t res;
44
45 /* Send a frame from the file to the appropriate channel */
47 if ((res = fread(s->fr.data.ptr, 1, s->fr.datalen, s->f)) < 1) {
48 if (res) {
49 ast_log(LOG_WARNING, "Short read of %s data (expected %d bytes, read %zu): %s\n",
51 strerror(errno));
52 }
53 return NULL;
54 }
55 *whennext = s->fr.samples = res * 2;
56 s->fr.datalen = res;
57 return &s->fr;
58}
#define ast_log
Definition: astobj2.c:42
const char * ast_format_get_name(const struct ast_format *format)
Get the name associated with a format.
Definition: format.c:334
#define BUF_SIZE
Definition: format_vox.c:38
#define AST_FRAME_SET_BUFFER(fr, _base, _ofs, _datalen)
#define AST_FRIENDLY_OFFSET
Offset into a frame's data buffer.
#define LOG_WARNING
int errno
#define NULL
Definition: resample.c:96
struct ast_frame fr
frame produced by read, typically
Definition: mod_format.h:122
struct ast_format * format
struct ast_frame_subclass subclass
union ast_frame::@226 data

References ast_format_get_name(), AST_FRAME_SET_BUFFER, AST_FRIENDLY_OFFSET, ast_log, ast_filestream::buf, BUF_SIZE, ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, ast_frame_subclass::format, ast_filestream::fr, LOG_WARNING, NULL, ast_frame::ptr, ast_frame::samples, and ast_frame::subclass.

◆ vox_seek()

static int vox_seek ( struct ast_filestream fs,
off_t  sample_offset,
int  whence 
)
static

Definition at line 70 of file format_vox.c.

71{
72 off_t offset = 0, min = 0, cur, max, distance;
73
74 if ((cur = ftello(fs->f)) < 0) {
75 ast_log(AST_LOG_WARNING, "Unable to determine current position in g719 filestream %p: %s\n", fs, strerror(errno));
76 return -1;
77 }
78
79 if (fseeko(fs->f, 0, SEEK_END) < 0) {
80 ast_log(AST_LOG_WARNING, "Unable to seek to end of g719 filestream %p: %s\n", fs, strerror(errno));
81 return -1;
82 }
83
84 if ((max = ftello(fs->f)) < 0) {
85 ast_log(AST_LOG_WARNING, "Unable to determine max position in g719 filestream %p: %s\n", fs, strerror(errno));
86 return -1;
87 }
88
89 /* have to fudge to frame here, so not fully to sample */
90 distance = sample_offset/2;
91 if (whence == SEEK_SET) {
92 offset = distance;
93 } else if (whence == SEEK_CUR || whence == SEEK_FORCECUR) {
94 offset = distance + cur;
95 } else if (whence == SEEK_END) {
96 offset = max - distance;
97 }
98 if (whence != SEEK_FORCECUR) {
99 offset = (offset > max)?max:offset;
100 offset = (offset < min)?min:offset;
101 }
102 return fseeko(fs->f, offset, SEEK_SET);
103}
#define min(a, b)
Definition: f2c.h:197
#define max(a, b)
Definition: f2c.h:198
#define SEEK_FORCECUR
Definition: file.h:51
#define AST_LOG_WARNING

References ast_log, AST_LOG_WARNING, errno, ast_filestream::f, max, min, ast_frame::offset, and SEEK_FORCECUR.

◆ vox_tell()

static off_t vox_tell ( struct ast_filestream fs)
static

Definition at line 121 of file format_vox.c.

122{
123 off_t offset;
124 offset = ftello(fs->f) << 1;
125 return offset;
126}

References ast_filestream::f, and ast_frame::offset.

◆ vox_trunc()

static int vox_trunc ( struct ast_filestream fs)
static

Definition at line 105 of file format_vox.c.

106{
107 int fd;
108 off_t cur;
109
110 if ((fd = fileno(fs->f)) < 0) {
111 ast_log(AST_LOG_WARNING, "Unable to determine file descriptor for vox filestream %p: %s\n", fs, strerror(errno));
112 return -1;
113 }
114 if ((cur = ftello(fs->f)) < 0) {
115 ast_log(AST_LOG_WARNING, "Unable to determine current position in vox filestream %p: %s\n", fs, strerror(errno));
116 return -1;
117 }
118 /* Truncate file to current length */
119 return ftruncate(fd, cur);}

References ast_log, AST_LOG_WARNING, errno, and ast_filestream::f.

◆ vox_write()

static int vox_write ( struct ast_filestream s,
struct ast_frame f 
)
static

Definition at line 60 of file format_vox.c.

61{
62 int res;
63 if ((res = fwrite(f->data.ptr, 1, f->datalen, s->f)) != f->datalen) {
64 ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno));
65 return -1;
66 }
67 return 0;
68}

References ast_log, ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, LOG_WARNING, and ast_frame::ptr.

Variable Documentation

◆ __mod_info

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Dialogic VOX (ADPCM) File Format" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = AST_BUILDOPT_SUM, .support_level = AST_MODULE_SUPPORT_EXTENDED, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND }
static

Definition at line 158 of file format_vox.c.

◆ ast_module_info

const struct ast_module_info* ast_module_info = &__mod_info
static

Definition at line 158 of file format_vox.c.

◆ vox_f

struct ast_format_def vox_f
static

Definition at line 128 of file format_vox.c.

Referenced by load_module(), and unload_module().