#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 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_ORDER , .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 = "88eaa8f5c1bd988bedd71113385e0886" , .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 | slin_f |
Definition in file format_sln.c.
#define BUF_SIZE 320 |
Definition at line 37 of file format_sln.c.
#define SLIN_SAMPLES 160 |
Definition at line 38 of file format_sln.c.
static void __reg_module | ( | void | ) | [static] |
Definition at line 138 of file format_sln.c.
static void __unreg_module | ( | void | ) | [static] |
Definition at line 138 of file format_sln.c.
static int load_module | ( | void | ) | [static] |
Definition at line 122 of file format_sln.c.
References ast_format_register, AST_MODULE_LOAD_FAILURE, AST_MODULE_LOAD_SUCCESS, and slin_f.
00123 { 00124 if (ast_format_register(&slin_f)) 00125 return AST_MODULE_LOAD_FAILURE; 00126 return AST_MODULE_LOAD_SUCCESS; 00127 }
static struct ast_frame* slinear_read | ( | struct ast_filestream * | s, | |
int * | whennext | |||
) | [static] |
Definition at line 40 of file format_sln.c.
References AST_FORMAT_SLINEAR, AST_FRAME_SET_BUFFER, AST_FRAME_VOICE, AST_FRIENDLY_OFFSET, ast_log(), ast_filestream::buf, BUF_SIZE, ast_frame_subclass::codec, ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, ast_filestream::fr, ast_frame::frametype, LOG_WARNING, ast_frame::mallocd, ast_frame::ptr, ast_frame::samples, and ast_frame::subclass.
00041 { 00042 int res; 00043 /* Send a frame from the file to the appropriate channel */ 00044 00045 s->fr.frametype = AST_FRAME_VOICE; 00046 s->fr.subclass.codec = AST_FORMAT_SLINEAR; 00047 s->fr.mallocd = 0; 00048 AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, BUF_SIZE); 00049 if ((res = fread(s->fr.data.ptr, 1, s->fr.datalen, s->f)) < 1) { 00050 if (res) 00051 ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno)); 00052 return NULL; 00053 } 00054 *whennext = s->fr.samples = res/2; 00055 s->fr.datalen = res; 00056 return &s->fr; 00057 }
static int slinear_seek | ( | struct ast_filestream * | fs, | |
off_t | sample_offset, | |||
int | whence | |||
) | [static] |
Definition at line 77 of file format_sln.c.
References ast_filestream::f, ast_frame::offset, and SEEK_FORCECUR.
00078 { 00079 off_t offset=0,min,cur,max; 00080 00081 min = 0; 00082 sample_offset <<= 1; 00083 cur = ftello(fs->f); 00084 fseeko(fs->f, 0, SEEK_END); 00085 max = ftello(fs->f); 00086 if (whence == SEEK_SET) 00087 offset = sample_offset; 00088 else if (whence == SEEK_CUR || whence == SEEK_FORCECUR) 00089 offset = sample_offset + cur; 00090 else if (whence == SEEK_END) 00091 offset = max - sample_offset; 00092 if (whence != SEEK_FORCECUR) { 00093 offset = (offset > max)?max:offset; 00094 } 00095 /* always protect against seeking past begining. */ 00096 offset = (offset < min)?min:offset; 00097 return fseeko(fs->f, offset, SEEK_SET); 00098 }
static off_t slinear_tell | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 105 of file format_sln.c.
References ast_filestream::f.
00106 { 00107 return ftello(fs->f) / 2; 00108 }
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 59 of file format_sln.c.
References AST_FORMAT_SLINEAR, AST_FRAME_VOICE, ast_getformatname(), ast_log(), errno, ast_filestream::f, f, and LOG_WARNING.
00060 { 00061 int res; 00062 if (f->frametype != AST_FRAME_VOICE) { 00063 ast_log(LOG_WARNING, "Asked to write non-voice frame!\n"); 00064 return -1; 00065 } 00066 if (f->subclass.codec != AST_FORMAT_SLINEAR) { 00067 ast_log(LOG_WARNING, "Asked to write non-slinear frame (%s)!\n", ast_getformatname(f->subclass.codec)); 00068 return -1; 00069 } 00070 if ((res = fwrite(f->data.ptr, 1, f->datalen, fs->f)) != f->datalen) { 00071 ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno)); 00072 return -1; 00073 } 00074 return 0; 00075 }
static int unload_module | ( | void | ) | [static] |
Definition at line 129 of file format_sln.c.
References ast_format_unregister(), ast_format::name, and slin_f.
00130 { 00131 return ast_format_unregister(slin_f.name); 00132 }
struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .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 = "88eaa8f5c1bd988bedd71113385e0886" , .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND } [static] |
Definition at line 138 of file format_sln.c.
struct ast_module_info* ast_module_info = &__mod_info [static] |
Definition at line 138 of file format_sln.c.
struct ast_format slin_f [static] |