Flat, binary, ADPCM vox file format. 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 80 /* 80 bytes, 160 samples */ |
| #define | VOX_SAMPLES 160 |
Functions | |
| static void | __reg_module (void) |
| static void | __unreg_module (void) |
| static int | load_module (void) |
| static int | unload_module (void) |
| static struct ast_frame * | vox_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, .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 | vox_f |
Detailed Description
Define Documentation
| #define BUF_SIZE 80 /* 80 bytes, 160 samples */ |
Definition at line 39 of file format_vox.c.
Referenced by vox_read().
| #define VOX_SAMPLES 160 |
Definition at line 40 of file format_vox.c.
Function Documentation
| static void __reg_module | ( | void | ) | [static] |
Definition at line 165 of file format_vox.c.
| static void __unreg_module | ( | void | ) | [static] |
Definition at line 165 of file format_vox.c.
| static int load_module | ( | void | ) | [static] |
Definition at line 148 of file format_vox.c.
References AST_FORMAT_ADPCM, ast_format_def_register, ast_format_set(), AST_MODULE_LOAD_FAILURE, AST_MODULE_LOAD_SUCCESS, and ast_format_def::format.
{
ast_format_set(&vox_f.format, AST_FORMAT_ADPCM, 0);
if (ast_format_def_register(&vox_f))
return AST_MODULE_LOAD_FAILURE;
return AST_MODULE_LOAD_SUCCESS;
}
| static int unload_module | ( | void | ) | [static] |
Definition at line 156 of file format_vox.c.
References ast_format_def_unregister(), and ast_format_def::name.
{
return ast_format_def_unregister(vox_f.name);
}
| static struct ast_frame* vox_read | ( | struct ast_filestream * | s, |
| int * | whennext | ||
| ) | [static, read] |
Definition at line 42 of file format_vox.c.
References AST_FORMAT_ADPCM, 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, 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_ADPCM, 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)) < 1) {
if (res)
ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno));
return NULL;
}
*whennext = s->fr.samples = res * 2;
s->fr.datalen = res;
return &s->fr;
}
| static int vox_seek | ( | struct ast_filestream * | fs, |
| off_t | sample_offset, | ||
| int | whence | ||
| ) | [static] |
Definition at line 79 of file format_vox.c.
References ast_log(), AST_LOG_WARNING, errno, ast_filestream::f, ast_frame::offset, and SEEK_FORCECUR.
{
off_t offset = 0, min = 0, cur, max, distance;
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;
}
/* have to fudge to frame here, so not fully to sample */
distance = sample_offset/2;
if (whence == SEEK_SET) {
offset = distance;
} else if (whence == SEEK_CUR || whence == SEEK_FORCECUR) {
offset = distance + cur;
} else if (whence == SEEK_END) {
offset = max - distance;
}
if (whence != SEEK_FORCECUR) {
offset = (offset > max)?max:offset;
offset = (offset < min)?min:offset;
}
return fseeko(fs->f, offset, SEEK_SET);
}
| static off_t vox_tell | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 130 of file format_vox.c.
References ast_filestream::f, and ast_frame::offset.
{
off_t offset;
offset = ftello(fs->f) << 1;
return offset;
}
| static int vox_trunc | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 114 of file format_vox.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 vox 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 vox filestream %p: %s\n", fs, strerror(errno));
return -1;
}
/* Truncate file to current length */
return ftruncate(fd, cur);}
| static int vox_write | ( | struct ast_filestream * | s, |
| struct ast_frame * | f | ||
| ) | [static] |
Definition at line 61 of file format_vox.c.
References AST_FORMAT_ADPCM, 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_ADPCM) {
ast_log(LOG_WARNING, "Asked to write non-ADPCM frame (%s)!\n", ast_getformatname(&f->subclass.format));
return -1;
}
if ((res = fwrite(f->data.ptr, 1, f->datalen, s->f)) != f->datalen) {
ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno));
return -1;
}
return 0;
}
Variable Documentation
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, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND } [static] |
Definition at line 165 of file format_vox.c.
struct ast_module_info* ast_module_info = &__mod_info [static] |
Definition at line 165 of file format_vox.c.
struct ast_format_def vox_f [static] |
Definition at line 137 of file format_vox.c.
