Save to raw, headerless G729 data. 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 20 /* two G729 frames */ |
| #define | G729A_SAMPLES 160 |
Functions | |
| static void | __reg_module (void) |
| static void | __unreg_module (void) |
| static struct ast_frame * | g729_read (struct ast_filestream *s, int *whennext) |
| static int | g729_seek (struct ast_filestream *fs, off_t sample_offset, int whence) |
| static off_t | g729_tell (struct ast_filestream *fs) |
| static int | g729_trunc (struct ast_filestream *fs) |
| static int | g729_write (struct ast_filestream *fs, struct ast_frame *f) |
| static int | load_module (void) |
| static int | unload_module (void) |
Variables | |
| static struct ast_module_info | __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Raw G.729 data" , .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 | g729_f |
Detailed Description
Save to raw, headerless G729 data.
- Note:
- This is not an encoder/decoder. The codec fo g729 is only available with a commercial license from Digium, due to patent restrictions. Check http://www.digium.com for information.
- Extensions: g729
Definition in file format_g729.c.
Define Documentation
Definition at line 45 of file format_g729.c.
Referenced by g729_read(), g729_seek(), and g729_tell().
| #define G729A_SAMPLES 160 |
Definition at line 46 of file format_g729.c.
Referenced by g729_read(), g729_seek(), and g729_tell().
Function Documentation
| static void __reg_module | ( | void | ) | [static] |
Definition at line 165 of file format_g729.c.
| static void __unreg_module | ( | void | ) | [static] |
Definition at line 165 of file format_g729.c.
| static struct ast_frame* g729_read | ( | struct ast_filestream * | s, |
| int * | whennext | ||
| ) | [static, read] |
Definition at line 48 of file format_g729.c.
References AST_FORMAT_G729A, ast_format_set(), AST_FRAME_SET_BUFFER, AST_FRAME_VOICE, 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, ast_frame::frametype, G729A_SAMPLES, 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_G729A, 0);
s->fr.mallocd = 0;
s->fr.samples = G729A_SAMPLES;
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 && (res != 10)) /* XXX what for ? */
ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno));
return NULL;
}
*whennext = s->fr.samples;
return &s->fr;
}
| static int g729_seek | ( | struct ast_filestream * | fs, |
| off_t | sample_offset, | ||
| int | whence | ||
| ) | [static] |
Definition at line 88 of file format_g729.c.
References BUF_SIZE, ast_filestream::f, G729A_SAMPLES, ast_frame::offset, and SEEK_FORCECUR.
{
long bytes;
off_t min,cur,max,offset=0;
min = 0;
cur = ftello(fs->f);
fseeko(fs->f, 0, SEEK_END);
max = ftello(fs->f);
bytes = BUF_SIZE * (sample_offset / G729A_SAMPLES);
if (whence == SEEK_SET)
offset = bytes;
else if (whence == SEEK_CUR || whence == SEEK_FORCECUR)
offset = cur + bytes;
else if (whence == SEEK_END)
offset = max - bytes;
if (whence != SEEK_FORCECUR) {
offset = (offset > max)?max:offset;
}
/* protect against seeking beyond begining. */
offset = (offset < min)?min:offset;
if (fseeko(fs->f, offset, SEEK_SET) < 0)
return -1;
return 0;
}
| static off_t g729_tell | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 131 of file format_g729.c.
References BUF_SIZE, ast_filestream::f, G729A_SAMPLES, and ast_frame::offset.
{
off_t offset = ftello(fs->f);
return (offset/BUF_SIZE)*G729A_SAMPLES;
}
| static int g729_trunc | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 114 of file format_g729.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 g729 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 g729 filestream %p: %s\n", fs, strerror(errno));
return -1;
}
/* Truncate file to current length */
return ftruncate(fd, cur);
}
| static int g729_write | ( | struct ast_filestream * | fs, |
| struct ast_frame * | f | ||
| ) | [static] |
Definition at line 66 of file format_g729.c.
References AST_FORMAT_G729A, 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_G729A) {
ast_log(LOG_WARNING, "Asked to write non-G729 frame (%s)!\n", ast_getformatname(&f->subclass.format));
return -1;
}
if (f->datalen % 10) {
ast_log(LOG_WARNING, "Invalid data length, %d, should be multiple of 10\n", f->datalen);
return -1;
}
if ((res = fwrite(f->data.ptr, 1, f->datalen, fs->f)) != f->datalen) {
ast_log(LOG_WARNING, "Bad write (%d/10): %s\n", res, strerror(errno));
return -1;
}
return 0;
}
| static int load_module | ( | void | ) | [static] |
Definition at line 148 of file format_g729.c.
References ast_format_def_register, AST_FORMAT_G729A, ast_format_set(), AST_MODULE_LOAD_FAILURE, AST_MODULE_LOAD_SUCCESS, and ast_format_def::format.
{
ast_format_set(&g729_f.format, AST_FORMAT_G729A, 0);
if (ast_format_def_register(&g729_f))
return AST_MODULE_LOAD_FAILURE;
return AST_MODULE_LOAD_SUCCESS;
}
| static int unload_module | ( | void | ) | [static] |
Definition at line 156 of file format_g729.c.
References ast_format_def_unregister(), and ast_format_def::name.
{
return ast_format_def_unregister(g729_f.name);
}
Variable Documentation
struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Raw G.729 data" , .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 165 of file format_g729.c.
struct ast_module_info* ast_module_info = &__mod_info [static] |
Definition at line 165 of file format_g729.c.
struct ast_format_def g729_f [static] |
Definition at line 137 of file format_g729.c.
