#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 640 |
#define | SLIN_SAMPLES 320 |
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_DEFAULT , .description = "Raw Signed Linear 16KHz Audio support (SLN16)" , .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 = "a9c98e5d177805051735cb5b0b16b0a0" , .load = load_module, .unload = unload_module, } |
static struct ast_module_info * | ast_module_info = &__mod_info |
static struct ast_format | slin_f |
Definition in file format_sln16.c.
#define BUF_SIZE 640 |
Definition at line 34 of file format_sln16.c.
#define SLIN_SAMPLES 320 |
Definition at line 35 of file format_sln16.c.
static void __reg_module | ( | void | ) | [static] |
Definition at line 138 of file format_sln16.c.
static void __unreg_module | ( | void | ) | [static] |
Definition at line 138 of file format_sln16.c.
static int load_module | ( | void | ) | [static] |
Definition at line 125 of file format_sln16.c.
References ast_format_register, AST_MODULE_LOAD_FAILURE, AST_MODULE_LOAD_SUCCESS, and slin_f.
00126 { 00127 if (ast_format_register(&slin_f)) 00128 return AST_MODULE_LOAD_FAILURE; 00129 00130 return AST_MODULE_LOAD_SUCCESS; 00131 }
static struct ast_frame* slinear_read | ( | struct ast_filestream * | s, | |
int * | whennext | |||
) | [static] |
Definition at line 37 of file format_sln16.c.
References AST_FORMAT_SLINEAR16, AST_FRAME_SET_BUFFER, AST_FRAME_VOICE, AST_FRIENDLY_OFFSET, ast_log(), BUF_SIZE, errno, LOG_WARNING, and s.
00038 { 00039 int res; 00040 /* Send a frame from the file to the appropriate channel */ 00041 00042 s->fr.frametype = AST_FRAME_VOICE; 00043 s->fr.subclass = AST_FORMAT_SLINEAR16; 00044 s->fr.mallocd = 0; 00045 AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, BUF_SIZE); 00046 if ((res = fread(s->fr.data.ptr, 1, s->fr.datalen, s->f)) < 1) { 00047 if (res) 00048 ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno)); 00049 return NULL; 00050 } 00051 *whennext = s->fr.samples = res/2; 00052 s->fr.datalen = res; 00053 return &s->fr; 00054 }
static int slinear_seek | ( | struct ast_filestream * | fs, | |
off_t | sample_offset, | |||
int | whence | |||
) | [static] |
Definition at line 75 of file format_sln16.c.
References ast_filestream::f, ast_frame::offset, and SEEK_FORCECUR.
00076 { 00077 off_t offset = 0, min = 0, cur, max; 00078 00079 sample_offset <<= 1; 00080 00081 cur = ftello(fs->f); 00082 00083 fseeko(fs->f, 0, SEEK_END); 00084 00085 max = ftello(fs->f); 00086 00087 if (whence == SEEK_SET) 00088 offset = sample_offset; 00089 else if (whence == SEEK_CUR || whence == SEEK_FORCECUR) 00090 offset = sample_offset + cur; 00091 else if (whence == SEEK_END) 00092 offset = max - sample_offset; 00093 00094 if (whence != SEEK_FORCECUR) 00095 offset = (offset > max) ? max : offset; 00096 00097 /* always protect against seeking past begining. */ 00098 offset = (offset < min) ? min : offset; 00099 00100 return fseeko(fs->f, offset, SEEK_SET); 00101 }
static off_t slinear_tell | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 108 of file format_sln16.c.
References ast_filestream::f.
00109 { 00110 return ftello(fs->f) / 2; 00111 }
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 56 of file format_sln16.c.
References AST_FORMAT_SLINEAR16, AST_FRAME_VOICE, ast_log(), errno, ast_filestream::f, f, and LOG_WARNING.
00057 { 00058 int res; 00059 00060 if (f->frametype != AST_FRAME_VOICE) { 00061 ast_log(LOG_WARNING, "Asked to write non-voice frame!\n"); 00062 return -1; 00063 } 00064 if (f->subclass != AST_FORMAT_SLINEAR16) { 00065 ast_log(LOG_WARNING, "Asked to write non-slinear16 frame (%d)!\n", f->subclass); 00066 return -1; 00067 } 00068 if ((res = fwrite(f->data.ptr, 1, f->datalen, fs->f)) != f->datalen) { 00069 ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno)); 00070 return -1; 00071 } 00072 return 0; 00073 }
static int unload_module | ( | void | ) | [static] |
Definition at line 133 of file format_sln16.c.
References ast_format_unregister(), ast_format::name, and slin_f.
00134 { 00135 return ast_format_unregister(slin_f.name); 00136 }
struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "Raw Signed Linear 16KHz Audio support (SLN16)" , .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 = "a9c98e5d177805051735cb5b0b16b0a0" , .load = load_module, .unload = unload_module, } [static] |
Definition at line 138 of file format_sln16.c.
struct ast_module_info* ast_module_info = &__mod_info [static] |
Definition at line 138 of file format_sln16.c.
struct ast_format slin_f [static] |
Definition at line 113 of file format_sln16.c.