#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 = "8586c2a7d357cb591cc3a6607a8f62d1" , .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 33 of file format_sln.c.
#define SLIN_SAMPLES 160 |
Definition at line 34 of file format_sln.c.
static void __reg_module | ( | void | ) | [static] |
Definition at line 134 of file format_sln.c.
static void __unreg_module | ( | void | ) | [static] |
Definition at line 134 of file format_sln.c.
static int load_module | ( | void | ) | [static] |
Definition at line 118 of file format_sln.c.
References ast_format_register, AST_MODULE_LOAD_FAILURE, AST_MODULE_LOAD_SUCCESS, and slin_f.
00119 { 00120 if (ast_format_register(&slin_f)) 00121 return AST_MODULE_LOAD_FAILURE; 00122 return AST_MODULE_LOAD_SUCCESS; 00123 }
static struct ast_frame* slinear_read | ( | struct ast_filestream * | s, | |
int * | whennext | |||
) | [static] |
Definition at line 36 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.
00037 { 00038 int res; 00039 /* Send a frame from the file to the appropriate channel */ 00040 00041 s->fr.frametype = AST_FRAME_VOICE; 00042 s->fr.subclass.codec = AST_FORMAT_SLINEAR; 00043 s->fr.mallocd = 0; 00044 AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, BUF_SIZE); 00045 if ((res = fread(s->fr.data.ptr, 1, s->fr.datalen, s->f)) < 1) { 00046 if (res) 00047 ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno)); 00048 return NULL; 00049 } 00050 *whennext = s->fr.samples = res/2; 00051 s->fr.datalen = res; 00052 return &s->fr; 00053 }
static int slinear_seek | ( | struct ast_filestream * | fs, | |
off_t | sample_offset, | |||
int | whence | |||
) | [static] |
Definition at line 73 of file format_sln.c.
References ast_filestream::f, ast_frame::offset, and SEEK_FORCECUR.
00074 { 00075 off_t offset=0,min,cur,max; 00076 00077 min = 0; 00078 sample_offset <<= 1; 00079 cur = ftello(fs->f); 00080 fseeko(fs->f, 0, SEEK_END); 00081 max = ftello(fs->f); 00082 if (whence == SEEK_SET) 00083 offset = sample_offset; 00084 else if (whence == SEEK_CUR || whence == SEEK_FORCECUR) 00085 offset = sample_offset + cur; 00086 else if (whence == SEEK_END) 00087 offset = max - sample_offset; 00088 if (whence != SEEK_FORCECUR) { 00089 offset = (offset > max)?max:offset; 00090 } 00091 /* always protect against seeking past begining. */ 00092 offset = (offset < min)?min:offset; 00093 return fseeko(fs->f, offset, SEEK_SET); 00094 }
static off_t slinear_tell | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 101 of file format_sln.c.
References ast_filestream::f.
00102 { 00103 return ftello(fs->f) / 2; 00104 }
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 55 of file format_sln.c.
References AST_FORMAT_SLINEAR, AST_FRAME_VOICE, ast_getformatname(), ast_log(), errno, ast_filestream::f, f, fwrite, and LOG_WARNING.
00056 { 00057 int res; 00058 if (f->frametype != AST_FRAME_VOICE) { 00059 ast_log(LOG_WARNING, "Asked to write non-voice frame!\n"); 00060 return -1; 00061 } 00062 if (f->subclass.codec != AST_FORMAT_SLINEAR) { 00063 ast_log(LOG_WARNING, "Asked to write non-slinear frame (%s)!\n", ast_getformatname(f->subclass.codec)); 00064 return -1; 00065 } 00066 if ((res = fwrite(f->data.ptr, 1, f->datalen, fs->f)) != f->datalen) { 00067 ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno)); 00068 return -1; 00069 } 00070 return 0; 00071 }
static int unload_module | ( | void | ) | [static] |
Definition at line 125 of file format_sln.c.
References ast_format_unregister(), ast_format::name, and slin_f.
00126 { 00127 return ast_format_unregister(slin_f.name); 00128 }
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 = "8586c2a7d357cb591cc3a6607a8f62d1" , .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND } [static] |
Definition at line 134 of file format_sln.c.
struct ast_module_info* ast_module_info = &__mod_info [static] |
Definition at line 134 of file format_sln.c.
struct ast_format slin_f [static] |