#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_LOAD_ORDER , .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 = "ac1f6a56484a8820659555499174e588" , .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_sln16.c.
#define BUF_SIZE 640 |
Definition at line 38 of file format_sln16.c.
#define SLIN_SAMPLES 320 |
Definition at line 39 of file format_sln16.c.
static void __reg_module | ( | void | ) | [static] |
Definition at line 167 of file format_sln16.c.
static void __unreg_module | ( | void | ) | [static] |
Definition at line 167 of file format_sln16.c.
static int load_module | ( | void | ) | [static] |
Definition at line 150 of file format_sln16.c.
References ast_format_register, AST_MODULE_LOAD_FAILURE, AST_MODULE_LOAD_SUCCESS, and slin_f.
00151 { 00152 if (ast_format_register(&slin_f)) 00153 return AST_MODULE_LOAD_FAILURE; 00154 00155 return AST_MODULE_LOAD_SUCCESS; 00156 }
static struct ast_frame* slinear_read | ( | struct ast_filestream * | s, | |
int * | whennext | |||
) | [static] |
Definition at line 41 of file format_sln16.c.
References AST_FORMAT_SLINEAR16, 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.
00042 { 00043 int res; 00044 /* Send a frame from the file to the appropriate channel */ 00045 00046 s->fr.frametype = AST_FRAME_VOICE; 00047 s->fr.subclass.codec = AST_FORMAT_SLINEAR16; 00048 s->fr.mallocd = 0; 00049 AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, BUF_SIZE); 00050 if ((res = fread(s->fr.data.ptr, 1, s->fr.datalen, s->f)) < 1) { 00051 if (res) 00052 ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno)); 00053 return NULL; 00054 } 00055 *whennext = s->fr.samples = res/2; 00056 s->fr.datalen = res; 00057 return &s->fr; 00058 }
static int slinear_seek | ( | struct ast_filestream * | fs, | |
off_t | sample_offset, | |||
int | whence | |||
) | [static] |
Definition at line 79 of file format_sln16.c.
References ast_log(), AST_LOG_WARNING, errno, ast_filestream::f, ast_frame::offset, and SEEK_FORCECUR.
00080 { 00081 off_t offset = 0, min = 0, cur, max; 00082 00083 sample_offset <<= 1; 00084 00085 if ((cur = ftello(fs->f)) < 0) { 00086 ast_log(AST_LOG_WARNING, "Unable to determine current position in sln16 filestream %p: %s\n", fs, strerror(errno)); 00087 return -1; 00088 } 00089 00090 if (fseeko(fs->f, 0, SEEK_END) < 0) { 00091 ast_log(AST_LOG_WARNING, "Unable to seek to end of sln16 filestream %p: %s\n", fs, strerror(errno)); 00092 return -1; 00093 } 00094 00095 if ((max = ftello(fs->f)) < 0) { 00096 ast_log(AST_LOG_WARNING, "Unable to determine max position in sln16 filestream %p: %s\n", fs, strerror(errno)); 00097 return -1; 00098 } 00099 00100 if (whence == SEEK_SET) 00101 offset = sample_offset; 00102 else if (whence == SEEK_CUR || whence == SEEK_FORCECUR) 00103 offset = sample_offset + cur; 00104 else if (whence == SEEK_END) 00105 offset = max - sample_offset; 00106 00107 if (whence != SEEK_FORCECUR) 00108 offset = (offset > max) ? max : offset; 00109 00110 /* always protect against seeking past begining. */ 00111 offset = (offset < min) ? min : offset; 00112 00113 return fseeko(fs->f, offset, SEEK_SET); 00114 }
static off_t slinear_tell | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 133 of file format_sln16.c.
References ast_filestream::f.
00134 { 00135 return ftello(fs->f) / 2; 00136 }
static int slinear_trunc | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 116 of file format_sln16.c.
References ast_log(), AST_LOG_WARNING, errno, and ast_filestream::f.
00117 { 00118 int fd; 00119 off_t cur; 00120 00121 if ((fd = fileno(fs->f)) < 0) { 00122 ast_log(AST_LOG_WARNING, "Unable to determine file descriptor for sln16 filestream %p: %s\n", fs, strerror(errno)); 00123 return -1; 00124 } 00125 if ((cur = ftello(fs->f)) < 0) { 00126 ast_log(AST_LOG_WARNING, "Unable to determine current position in sln16 filestream %p: %s\n", fs, strerror(errno)); 00127 return -1; 00128 } 00129 /* Truncate file to current length */ 00130 return ftruncate(fd, cur); 00131 }
static int slinear_write | ( | struct ast_filestream * | fs, | |
struct ast_frame * | f | |||
) | [static] |
Definition at line 60 of file format_sln16.c.
References AST_FORMAT_SLINEAR16, AST_FRAME_VOICE, ast_getformatname(), ast_log(), errno, ast_filestream::f, f, and LOG_WARNING.
00061 { 00062 int res; 00063 00064 if (f->frametype != AST_FRAME_VOICE) { 00065 ast_log(LOG_WARNING, "Asked to write non-voice frame!\n"); 00066 return -1; 00067 } 00068 if (f->subclass.codec != AST_FORMAT_SLINEAR16) { 00069 ast_log(LOG_WARNING, "Asked to write non-slinear16 frame (%s)!\n", ast_getformatname(f->subclass.codec)); 00070 return -1; 00071 } 00072 if ((res = fwrite(f->data.ptr, 1, f->datalen, fs->f)) != f->datalen) { 00073 ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno)); 00074 return -1; 00075 } 00076 return 0; 00077 }
static int unload_module | ( | void | ) | [static] |
Definition at line 158 of file format_sln16.c.
References ast_format_unregister(), ast_format::name, and slin_f.
00159 { 00160 return ast_format_unregister(slin_f.name); 00161 }
struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .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 = "ac1f6a56484a8820659555499174e588" , .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND } [static] |
Definition at line 167 of file format_sln16.c.
struct ast_module_info* ast_module_info = &__mod_info [static] |
Definition at line 167 of file format_sln16.c.
struct ast_format slin_f [static] |
Definition at line 138 of file format_sln16.c.