ITU G.722.1 Annex C (Siren14, licensed from Polycom) format, 48kbps bitrate only. More...
#include "asterisk.h"#include "asterisk/mod_format.h"#include "asterisk/module.h"#include "asterisk/endian.h"
Go to the source code of this file.
Defines | |
| #define | BUF_SIZE 120 /* 20 milliseconds == 120 bytes, 640 samples */ |
| #define | BYTES_TO_SAMPLES(x) ((typeof(x)) x * ((float) 640 / 120)) |
| #define | SAMPLES_TO_BYTES(x) ((typeof(x)) x / ((float) 640 / 120)) |
Functions | |
| static void | __reg_module (void) |
| static void | __unreg_module (void) |
| static int | load_module (void) |
| static struct ast_frame * | siren14read (struct ast_filestream *s, int *whennext) |
| static int | siren14seek (struct ast_filestream *fs, off_t sample_offset, int whence) |
| static off_t | siren14tell (struct ast_filestream *fs) |
| static int | siren14trunc (struct ast_filestream *fs) |
| static int | siren14write (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 = "ITU G.722.1 Annex C (Siren14, licensed from Polycom)" , .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, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND } |
| static struct ast_module_info * | ast_module_info = &__mod_info |
| static struct ast_format_def | siren14_f |
Detailed Description
ITU G.722.1 Annex C (Siren14, licensed from Polycom) format, 48kbps bitrate only.
- File name extensions: siren14
Definition in file format_siren14.c.
Define Documentation
| #define BUF_SIZE 120 /* 20 milliseconds == 120 bytes, 640 samples */ |
Definition at line 38 of file format_siren14.c.
Referenced by siren14read().
| #define BYTES_TO_SAMPLES | ( | x | ) | ((typeof(x)) x * ((float) 640 / 120)) |
Definition at line 40 of file format_siren14.c.
Referenced by siren14read(), and siren14tell().
| #define SAMPLES_TO_BYTES | ( | x | ) | ((typeof(x)) x / ((float) 640 / 120)) |
Definition at line 39 of file format_siren14.c.
Referenced by siren14seek().
Function Documentation
| static void __reg_module | ( | void | ) | [static] |
Definition at line 167 of file format_siren14.c.
| static void __unreg_module | ( | void | ) | [static] |
Definition at line 167 of file format_siren14.c.
| static int load_module | ( | void | ) | [static] |
Definition at line 149 of file format_siren14.c.
References ast_format_def_register, ast_format_set(), AST_FORMAT_SIREN14, AST_MODULE_LOAD_DECLINE, AST_MODULE_LOAD_SUCCESS, and ast_format_def::format.
{
ast_format_set(&siren14_f.format, AST_FORMAT_SIREN14, 0);
if (ast_format_def_register(&siren14_f))
return AST_MODULE_LOAD_DECLINE;
return AST_MODULE_LOAD_SUCCESS;
}
| static struct ast_frame* siren14read | ( | struct ast_filestream * | s, |
| int * | whennext | ||
| ) | [static, read] |
Definition at line 42 of file format_siren14.c.
References ast_format_set(), AST_FORMAT_SIREN14, AST_FRAME_SET_BUFFER, AST_FRAME_VOICE, AST_FRIENDLY_OFFSET, ast_log(), ast_filestream::buf, BUF_SIZE, BYTES_TO_SAMPLES, ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, ast_frame_subclass::format, ast_filestream::fr, ast_frame::frametype, LOG_WARNING, ast_frame::mallocd, ast_frame::ptr, ast_frame::samples, and ast_frame::subclass.
{
int res;
/* Send a frame from the file to the appropriate channel */
s->fr.frametype = AST_FRAME_VOICE;
ast_format_set(&s->fr.subclass.format, AST_FORMAT_SIREN14, 0);
s->fr.mallocd = 0;
AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, BUF_SIZE);
if ((res = fread(s->fr.data.ptr, 1, s->fr.datalen, s->f)) != s->fr.datalen) {
if (res)
ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno));
return NULL;
}
*whennext = s->fr.samples = BYTES_TO_SAMPLES(res);
return &s->fr;
}
| static int siren14seek | ( | struct ast_filestream * | fs, |
| off_t | sample_offset, | ||
| int | whence | ||
| ) | [static] |
Definition at line 79 of file format_siren14.c.
References ast_log(), AST_LOG_WARNING, errno, ast_filestream::f, ast_frame::offset, SAMPLES_TO_BYTES, and SEEK_FORCECUR.
{
off_t offset = 0, min = 0, cur, max;
sample_offset = SAMPLES_TO_BYTES(sample_offset);
if ((cur = ftello(fs->f)) < 0) {
ast_log(AST_LOG_WARNING, "Unable to determine current position in siren14 filestream %p: %s\n", fs, strerror(errno));
return -1;
}
if (fseeko(fs->f, 0, SEEK_END) < 0) {
ast_log(AST_LOG_WARNING, "Unable to seek to end of siren14 filestream %p: %s\n", fs, strerror(errno));
return -1;
}
if ((max = ftello(fs->f)) < 0) {
ast_log(AST_LOG_WARNING, "Unable to determine max position in siren14 filestream %p: %s\n", fs, strerror(errno));
return -1;
}
if (whence == SEEK_SET)
offset = sample_offset;
else if (whence == SEEK_CUR || whence == SEEK_FORCECUR)
offset = sample_offset + cur;
else if (whence == SEEK_END)
offset = max - sample_offset;
if (whence != SEEK_FORCECUR)
offset = (offset > max) ? max : offset;
/* always protect against seeking past begining. */
offset = (offset < min) ? min : offset;
return fseeko(fs->f, offset, SEEK_SET);
}
| static off_t siren14tell | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 133 of file format_siren14.c.
References BYTES_TO_SAMPLES, and ast_filestream::f.
{
return BYTES_TO_SAMPLES(ftello(fs->f));
}
| static int siren14trunc | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 116 of file format_siren14.c.
References ast_log(), AST_LOG_WARNING, errno, and ast_filestream::f.
{
int fd;
off_t cur;
if ((fd = fileno(fs->f)) < 0) {
ast_log(AST_LOG_WARNING, "Unable to determine file descriptor for siren14 filestream %p: %s\n", fs, strerror(errno));
return -1;
}
if ((cur = ftello(fs->f)) < 0) {
ast_log(AST_LOG_WARNING, "Unable to determine current position in siren14 filestream %p: %s\n", fs, strerror(errno));
return -1;
}
/* Truncate file to current length */
return ftruncate(fd, cur);
}
| static int siren14write | ( | struct ast_filestream * | fs, |
| struct ast_frame * | f | ||
| ) | [static] |
Definition at line 60 of file format_siren14.c.
References AST_FORMAT_SIREN14, AST_FRAME_VOICE, ast_getformatname(), ast_log(), ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, ast_frame_subclass::format, ast_frame::frametype, ast_format::id, LOG_WARNING, ast_frame::ptr, and ast_frame::subclass.
{
int res;
if (f->frametype != AST_FRAME_VOICE) {
ast_log(LOG_WARNING, "Asked to write non-voice frame!\n");
return -1;
}
if (f->subclass.format.id != AST_FORMAT_SIREN14) {
ast_log(LOG_WARNING, "Asked to write non-Siren14 frame (%s)!\n", ast_getformatname(&f->subclass.format));
return -1;
}
if ((res = fwrite(f->data.ptr, 1, f->datalen, fs->f)) != f->datalen) {
ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno));
return -1;
}
return 0;
}
| static int unload_module | ( | void | ) | [static] |
Definition at line 158 of file format_siren14.c.
References ast_format_def_unregister(), and ast_format_def::name.
{
return ast_format_def_unregister(siren14_f.name);
}
Variable Documentation
struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "ITU G.722.1 Annex C (Siren14, licensed from Polycom)" , .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, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND } [static] |
Definition at line 167 of file format_siren14.c.
struct ast_module_info* ast_module_info = &__mod_info [static] |
Definition at line 167 of file format_siren14.c.
struct ast_format_def siren14_f [static] |
Definition at line 138 of file format_siren14.c.
