ITU G.719 , 64kbps 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 160 /* 20 milliseconds == 160 bytes, 960 samples */ |
| #define | BYTES_TO_SAMPLES(x) ((typeof(x)) x * ((float) 960 / 160)) |
| #define | SAMPLES_TO_BYTES(x) ((typeof(x)) x / ((float) 960 / 160)) |
Functions | |
| static void | __reg_module (void) |
| static void | __unreg_module (void) |
| static struct ast_frame * | g719read (struct ast_filestream *s, int *whennext) |
| static int | g719seek (struct ast_filestream *fs, off_t sample_offset, int whence) |
| static off_t | g719tell (struct ast_filestream *fs) |
| static int | g719trunc (struct ast_filestream *fs) |
| static int | g719write (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 = "ITU G.719" , .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 | g719_f |
Detailed Description
Define Documentation
| #define BUF_SIZE 160 /* 20 milliseconds == 160 bytes, 960 samples */ |
Definition at line 38 of file format_g719.c.
Referenced by g719read().
| #define BYTES_TO_SAMPLES | ( | x | ) | ((typeof(x)) x * ((float) 960 / 160)) |
Definition at line 40 of file format_g719.c.
Referenced by g719read(), and g719tell().
| #define SAMPLES_TO_BYTES | ( | x | ) | ((typeof(x)) x / ((float) 960 / 160)) |
Definition at line 39 of file format_g719.c.
Referenced by g719seek().
Function Documentation
| static void __reg_module | ( | void | ) | [static] |
Definition at line 165 of file format_g719.c.
| static void __unreg_module | ( | void | ) | [static] |
Definition at line 165 of file format_g719.c.
| static struct ast_frame* g719read | ( | struct ast_filestream * | s, |
| int * | whennext | ||
| ) | [static, read] |
Definition at line 42 of file format_g719.c.
References AST_FORMAT_G719, ast_format_set(), 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_G719, 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 g719seek | ( | struct ast_filestream * | fs, |
| off_t | sample_offset, | ||
| int | whence | ||
| ) | [static] |
Definition at line 79 of file format_g719.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 g719 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 g719 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 g719 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 g719tell | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 132 of file format_g719.c.
References BYTES_TO_SAMPLES, and ast_filestream::f.
{
return BYTES_TO_SAMPLES(ftello(fs->f));
}
| static int g719trunc | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 116 of file format_g719.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 g719 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 g719 filestream %p: %s\n", fs, strerror(errno));
return -1;
}
return ftruncate(fd, cur);
}
| static int g719write | ( | struct ast_filestream * | fs, |
| struct ast_frame * | f | ||
| ) | [static] |
Definition at line 60 of file format_g719.c.
References AST_FORMAT_G719, 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_G719) {
ast_log(LOG_WARNING, "Asked to write non-G.719 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 load_module | ( | void | ) | [static] |
Definition at line 148 of file format_g719.c.
References ast_format_def_register, AST_FORMAT_G719, ast_format_set(), AST_MODULE_LOAD_DECLINE, AST_MODULE_LOAD_SUCCESS, and ast_format_def::format.
{
ast_format_set(&g719_f.format, AST_FORMAT_G719, 0);
if (ast_format_def_register(&g719_f))
return AST_MODULE_LOAD_DECLINE;
return AST_MODULE_LOAD_SUCCESS;
}
| static int unload_module | ( | void | ) | [static] |
Definition at line 156 of file format_g719.c.
References ast_format_def_unregister(), and ast_format_def::name.
{
return ast_format_def_unregister(g719_f.name);
}
Variable Documentation
struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "ITU G.719" , .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_g719.c.
struct ast_module_info* ast_module_info = &__mod_info [static] |
Definition at line 165 of file format_g719.c.
struct ast_format_def g719_f [static] |
Definition at line 137 of file format_g719.c.
