Asterisk - The Open Source Telephony Project GIT-master-0bf3178
Functions | Variables
format_sln.c File Reference

RAW SLINEAR Formats. 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_sln.c:

Go to the source code of this file.

Functions

static void __reg_module (void)
 
static void __unreg_module (void)
 
struct ast_moduleAST_MODULE_SELF_SYM (void)
 
static struct ast_framegeneric_read (struct ast_filestream *s, int *whennext, unsigned int buf_size)
 
static int load_module (void)
 
static struct ast_frameslinear12_read (struct ast_filestream *s, int *whennext)
 
static struct ast_frameslinear16_read (struct ast_filestream *s, int *whennext)
 
static struct ast_frameslinear192_read (struct ast_filestream *s, int *whennext)
 
static struct ast_frameslinear24_read (struct ast_filestream *s, int *whennext)
 
static struct ast_frameslinear32_read (struct ast_filestream *s, int *whennext)
 
static struct ast_frameslinear44_read (struct ast_filestream *s, int *whennext)
 
static struct ast_frameslinear48_read (struct ast_filestream *s, int *whennext)
 
static struct ast_frameslinear96_read (struct ast_filestream *s, int *whennext)
 
static struct ast_frameslinear_read (struct ast_filestream *s, int *whennext)
 
static int slinear_seek (struct ast_filestream *fs, off_t sample_offset, int whence)
 
static off_t slinear_tell (struct ast_filestream *fs)
 
static int slinear_trunc (struct ast_filestream *fs)
 
static int slinear_write (struct ast_filestream *fs, struct ast_frame *f)
 
static int unload_module (void)
 

Variables

static struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Raw Signed Linear Audio support (SLN) 8khz-192khz" , .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_CORE, .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 slin12_f
 
static struct ast_format_def slin16_f
 
static struct ast_format_def slin192_f
 
static struct ast_format_def slin24_f
 
static struct ast_format_def slin32_f
 
static struct ast_format_def slin44_f
 
static struct ast_format_def slin48_f
 
static struct ast_format_def slin96_f
 
static struct ast_format_def slin_f
 
static struct ast_format_defslin_list []
 

Detailed Description

RAW SLINEAR Formats.

Definition in file format_sln.c.

Function Documentation

◆ __reg_module()

static void __reg_module ( void  )
static

Definition at line 289 of file format_sln.c.

◆ __unreg_module()

static void __unreg_module ( void  )
static

Definition at line 289 of file format_sln.c.

◆ AST_MODULE_SELF_SYM()

struct ast_module * AST_MODULE_SELF_SYM ( void  )

Definition at line 289 of file format_sln.c.

◆ generic_read()

static struct ast_frame * generic_read ( struct ast_filestream s,
int *  whennext,
unsigned int  buf_size 
)
static

Definition at line 35 of file format_sln.c.

36{
37 size_t res;
38
39 /* Send a frame from the file to the appropriate channel */
41 if ((res = fread(s->fr.data.ptr, 1, s->fr.datalen, s->f)) < 1) {
42 if (res) {
43 ast_log(LOG_WARNING, "Short read of %s data (expected %d bytes, read %zu): %s\n",
45 strerror(errno));
46 }
47 return NULL;
48 }
49 *whennext = s->fr.samples = res/2;
50 s->fr.datalen = res;
51 return &s->fr;
52}
#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 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, 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.

Referenced by slinear12_read(), slinear16_read(), slinear192_read(), slinear24_read(), slinear32_read(), slinear44_read(), slinear48_read(), slinear96_read(), and slinear_read().

◆ load_module()

static int load_module ( void  )
static

Definition at line 260 of file format_sln.c.

261{
262 int i;
263
273
274 for (i = 0; i < ARRAY_LEN(slin_list); i++) {
278 }
279 }
280
282}
struct ast_format * ast_format_slin44
Built-in cached signed linear 44kHz format.
Definition: format_cache.c:66
struct ast_format * ast_format_slin24
Built-in cached signed linear 24kHz format.
Definition: format_cache.c:56
struct ast_format * ast_format_slin32
Built-in cached signed linear 32kHz format.
Definition: format_cache.c:61
struct ast_format * ast_format_slin192
Built-in cached signed linear 192kHz format.
Definition: format_cache.c:81
struct ast_format * ast_format_slin16
Built-in cached signed linear 16kHz format.
Definition: format_cache.c:51
struct ast_format * ast_format_slin96
Built-in cached signed linear 96kHz format.
Definition: format_cache.c:76
struct ast_format * ast_format_slin48
Built-in cached signed linear 48kHz format.
Definition: format_cache.c:71
struct ast_format * ast_format_slin
Built-in cached signed linear 8kHz format.
Definition: format_cache.c:41
struct ast_format * ast_format_slin12
Built-in cached signed linear 12kHz format.
Definition: format_cache.c:46
static struct ast_format_def slin16_f
Definition: format_sln.c:152
static struct ast_format_def slin_f
Definition: format_sln.c:128
static struct ast_format_def slin44_f
Definition: format_sln.c:188
static struct ast_format_def * slin_list[]
Definition: format_sln.c:235
static struct ast_format_def slin12_f
Definition: format_sln.c:140
static struct ast_format_def slin48_f
Definition: format_sln.c:200
static struct ast_format_def slin32_f
Definition: format_sln.c:176
static struct ast_format_def slin24_f
Definition: format_sln.c:164
static int unload_module(void)
Definition: format_sln.c:247
static struct ast_format_def slin192_f
Definition: format_sln.c:224
static struct ast_format_def slin96_f
Definition: format_sln.c:212
#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
#define ARRAY_LEN(a)
Definition: utils.h:666

References ARRAY_LEN, ast_format_def_register, ast_format_slin, ast_format_slin12, ast_format_slin16, ast_format_slin192, ast_format_slin24, ast_format_slin32, ast_format_slin44, ast_format_slin48, ast_format_slin96, AST_MODULE_LOAD_DECLINE, AST_MODULE_LOAD_SUCCESS, ast_format_def::format, slin12_f, slin16_f, slin192_f, slin24_f, slin32_f, slin44_f, slin48_f, slin96_f, slin_f, slin_list, and unload_module().

◆ slinear12_read()

static struct ast_frame * slinear12_read ( struct ast_filestream s,
int *  whennext 
)
static

Definition at line 139 of file format_sln.c.

139{return generic_read(s, whennext, 480);}
static struct ast_frame * generic_read(struct ast_filestream *s, int *whennext, unsigned int buf_size)
Definition: format_sln.c:35

References generic_read().

◆ slinear16_read()

static struct ast_frame * slinear16_read ( struct ast_filestream s,
int *  whennext 
)
static

Definition at line 151 of file format_sln.c.

151{return generic_read(s, whennext, 640);}

References generic_read().

◆ slinear192_read()

static struct ast_frame * slinear192_read ( struct ast_filestream s,
int *  whennext 
)
static

Definition at line 223 of file format_sln.c.

223{return generic_read(s, whennext, 7680);}

References generic_read().

◆ slinear24_read()

static struct ast_frame * slinear24_read ( struct ast_filestream s,
int *  whennext 
)
static

Definition at line 163 of file format_sln.c.

163{return generic_read(s, whennext, 960);}

References generic_read().

◆ slinear32_read()

static struct ast_frame * slinear32_read ( struct ast_filestream s,
int *  whennext 
)
static

Definition at line 175 of file format_sln.c.

175{return generic_read(s, whennext, 1280);}

References generic_read().

◆ slinear44_read()

static struct ast_frame * slinear44_read ( struct ast_filestream s,
int *  whennext 
)
static

Definition at line 187 of file format_sln.c.

187{return generic_read(s, whennext, 1764);}

References generic_read().

◆ slinear48_read()

static struct ast_frame * slinear48_read ( struct ast_filestream s,
int *  whennext 
)
static

Definition at line 199 of file format_sln.c.

199{return generic_read(s, whennext, 1920);}

References generic_read().

◆ slinear96_read()

static struct ast_frame * slinear96_read ( struct ast_filestream s,
int *  whennext 
)
static

Definition at line 211 of file format_sln.c.

211{return generic_read(s, whennext, 3840);}

References generic_read().

◆ slinear_read()

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

Definition at line 127 of file format_sln.c.

127{return generic_read(s, whennext, 320);}

References generic_read().

◆ slinear_seek()

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

Definition at line 70 of file format_sln.c.

71{
72 off_t offset=0, min = 0, cur, max;
73
74 sample_offset <<= 1;
75
76 if ((cur = ftello(fs->f)) < 0) {
77 ast_log(AST_LOG_WARNING, "Unable to determine current position in sln filestream %p: %s\n", fs, strerror(errno));
78 return -1;
79 }
80
81 if (fseeko(fs->f, 0, SEEK_END) < 0) {
82 ast_log(AST_LOG_WARNING, "Unable to seek to end of sln filestream %p: %s\n", fs, strerror(errno));
83 return -1;
84 }
85
86 if ((max = ftello(fs->f)) < 0) {
87 ast_log(AST_LOG_WARNING, "Unable to determine max position in sln filestream %p: %s\n", fs, strerror(errno));
88 return -1;
89 }
90
91 if (whence == SEEK_SET)
92 offset = sample_offset;
93 else if (whence == SEEK_CUR || whence == SEEK_FORCECUR)
94 offset = sample_offset + cur;
95 else if (whence == SEEK_END)
96 offset = max - sample_offset;
97 if (whence != SEEK_FORCECUR) {
98 offset = (offset > max)?max:offset;
99 }
100 /* always protect against seeking past begining. */
101 offset = (offset < min)?min:offset;
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.

◆ slinear_tell()

static off_t slinear_tell ( struct ast_filestream fs)
static

Definition at line 122 of file format_sln.c.

123{
124 return ftello(fs->f) / 2;
125}

References ast_filestream::f.

◆ slinear_trunc()

static int slinear_trunc ( struct ast_filestream fs)
static

Definition at line 105 of file format_sln.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 sln 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 sln filestream %p: %s\n", fs, strerror(errno));
116 return -1;
117 }
118 /* Truncate file to current length */
119 return ftruncate(fd, cur);
120}

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

◆ slinear_write()

static int slinear_write ( struct ast_filestream fs,
struct ast_frame f 
)
static

Definition at line 54 of file format_sln.c.

55{
56 int res;
57
58 /* Don't try to write an interpolated frame */
59 if (f->datalen == 0) {
60 return 0;
61 }
62
63 if ((res = fwrite(f->data.ptr, 1, f->datalen, fs->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.

◆ unload_module()

static int unload_module ( void  )
static

Definition at line 247 of file format_sln.c.

248{
249 int res = 0;
250 int i = 0;
251
252 for (i = 0; i < ARRAY_LEN(slin_list); i++) {
254 res = -1;
255 }
256 }
257 return res;
258}
static const char name[]
Definition: format_mp3.c:68
int ast_format_def_unregister(const char *name)
Unregisters a file format.
Definition: file.c:162

References ARRAY_LEN, ast_format_def_unregister(), name, and slin_list.

Referenced by load_module().

Variable Documentation

◆ __mod_info

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Raw Signed Linear Audio support (SLN) 8khz-192khz" , .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_CORE, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND }
static

Definition at line 289 of file format_sln.c.

◆ ast_module_info

const struct ast_module_info* ast_module_info = &__mod_info
static

Definition at line 289 of file format_sln.c.

◆ slin12_f

struct ast_format_def slin12_f
static

Definition at line 140 of file format_sln.c.

Referenced by load_module().

◆ slin16_f

struct ast_format_def slin16_f
static

Definition at line 152 of file format_sln.c.

Referenced by load_module().

◆ slin192_f

struct ast_format_def slin192_f
static

Definition at line 224 of file format_sln.c.

Referenced by load_module().

◆ slin24_f

struct ast_format_def slin24_f
static

Definition at line 164 of file format_sln.c.

Referenced by load_module().

◆ slin32_f

struct ast_format_def slin32_f
static

Definition at line 176 of file format_sln.c.

Referenced by load_module().

◆ slin44_f

struct ast_format_def slin44_f
static

Definition at line 188 of file format_sln.c.

Referenced by load_module().

◆ slin48_f

struct ast_format_def slin48_f
static

Definition at line 200 of file format_sln.c.

Referenced by load_module().

◆ slin96_f

struct ast_format_def slin96_f
static

Definition at line 212 of file format_sln.c.

Referenced by load_module().

◆ slin_f

struct ast_format_def slin_f
static

Definition at line 128 of file format_sln.c.

Referenced by load_module().

◆ slin_list

struct ast_format_def* slin_list[]
static

Definition at line 235 of file format_sln.c.

Referenced by load_module(), and unload_module().