#include "asterisk.h"
#include <unistd.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <sys/time.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include "asterisk/lock.h"
#include "asterisk/channel.h"
#include "asterisk/file.h"
#include "asterisk/logger.h"
#include "asterisk/sched.h"
#include "asterisk/module.h"
#include "asterisk/endian.h"
Go to the source code of this file.
Defines | |
#define | BUF_SIZE 320 |
#define | SLIN_SAMPLES 160 |
Functions | |
static void | __reg_module (void) |
static void | __unreg_module (void) |
static int | load_module (void) |
static struct ast_frame * | slinear_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_FIRST | AST_MODFLAG_BUILDSUM, .description = "Raw Signed Linear Audio support (SLN)" , .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 = "361d7bb937402d51e4658efb5b4d76e4" , .load = load_module, .unload = unload_module, } |
static const struct ast_module_info * | ast_module_info = &__mod_info |
static struct ast_format | slin_f |
Definition in file format_sln.c.
#define BUF_SIZE 320 |
Definition at line 46 of file format_sln.c.
#define SLIN_SAMPLES 160 |
Definition at line 47 of file format_sln.c.
static void __reg_module | ( | void | ) | [static] |
Definition at line 144 of file format_sln.c.
static void __unreg_module | ( | void | ) | [static] |
Definition at line 144 of file format_sln.c.
static int load_module | ( | void | ) | [static] |
Definition at line 131 of file format_sln.c.
References ast_format_register, and slin_f.
00132 { 00133 return ast_format_register(&slin_f); 00134 }
static struct ast_frame* slinear_read | ( | struct ast_filestream * | s, | |
int * | whennext | |||
) | [static] |
Definition at line 49 of file format_sln.c.
References AST_FORMAT_SLINEAR, AST_FRAME_SET_BUFFER, AST_FRAME_VOICE, AST_FRIENDLY_OFFSET, ast_log(), BUF_SIZE, errno, LOG_WARNING, and s.
00050 { 00051 int res; 00052 /* Send a frame from the file to the appropriate channel */ 00053 00054 s->fr.frametype = AST_FRAME_VOICE; 00055 s->fr.subclass = AST_FORMAT_SLINEAR; 00056 s->fr.mallocd = 0; 00057 AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, BUF_SIZE); 00058 if ((res = fread(s->fr.data, 1, s->fr.datalen, s->f)) < 1) { 00059 if (res) 00060 ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno)); 00061 return NULL; 00062 } 00063 *whennext = s->fr.samples = res/2; 00064 s->fr.datalen = res; 00065 return &s->fr; 00066 }
static int slinear_seek | ( | struct ast_filestream * | fs, | |
off_t | sample_offset, | |||
int | whence | |||
) | [static] |
Definition at line 86 of file format_sln.c.
References ast_filestream::f, offset, and SEEK_FORCECUR.
00087 { 00088 off_t offset=0,min,cur,max; 00089 00090 min = 0; 00091 sample_offset <<= 1; 00092 cur = ftello(fs->f); 00093 fseeko(fs->f, 0, SEEK_END); 00094 max = ftello(fs->f); 00095 if (whence == SEEK_SET) 00096 offset = sample_offset; 00097 else if (whence == SEEK_CUR || whence == SEEK_FORCECUR) 00098 offset = sample_offset + cur; 00099 else if (whence == SEEK_END) 00100 offset = max - sample_offset; 00101 if (whence != SEEK_FORCECUR) { 00102 offset = (offset > max)?max:offset; 00103 } 00104 /* always protect against seeking past begining. */ 00105 offset = (offset < min)?min:offset; 00106 return fseeko(fs->f, offset, SEEK_SET); 00107 }
static off_t slinear_tell | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 114 of file format_sln.c.
References ast_filestream::f.
00115 { 00116 return ftello(fs->f) / 2; 00117 }
static int slinear_trunc | ( | struct ast_filestream * | fs | ) | [static] |
static int slinear_write | ( | struct ast_filestream * | fs, | |
struct ast_frame * | f | |||
) | [static] |
Definition at line 68 of file format_sln.c.
References AST_FORMAT_SLINEAR, AST_FRAME_VOICE, ast_log(), errno, ast_filestream::f, f, and LOG_WARNING.
00069 { 00070 int res; 00071 if (f->frametype != AST_FRAME_VOICE) { 00072 ast_log(LOG_WARNING, "Asked to write non-voice frame!\n"); 00073 return -1; 00074 } 00075 if (f->subclass != AST_FORMAT_SLINEAR) { 00076 ast_log(LOG_WARNING, "Asked to write non-slinear frame (%d)!\n", f->subclass); 00077 return -1; 00078 } 00079 if ((res = fwrite(f->data, 1, f->datalen, fs->f)) != f->datalen) { 00080 ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno)); 00081 return -1; 00082 } 00083 return 0; 00084 }
static int unload_module | ( | void | ) | [static] |
Definition at line 136 of file format_sln.c.
References ast_format_unregister(), ast_format::name, and slin_f.
00137 { 00138 return ast_format_unregister(slin_f.name); 00139 }
struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_FIRST | AST_MODFLAG_BUILDSUM, .description = "Raw Signed Linear Audio support (SLN)" , .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 = "361d7bb937402d51e4658efb5b4d76e4" , .load = load_module, .unload = unload_module, } [static] |
Definition at line 144 of file format_sln.c.
const struct ast_module_info* ast_module_info = &__mod_info [static] |
Definition at line 144 of file format_sln.c.
struct ast_format slin_f [static] |