#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 = "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_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 162 of file format_sln.c.
static void __unreg_module | ( | void | ) | [static] |
Definition at line 162 of file format_sln.c.
static int load_module | ( | void | ) | [static] |
Definition at line 146 of file format_sln.c.
References ast_format_register, AST_MODULE_LOAD_FAILURE, AST_MODULE_LOAD_SUCCESS, and slin_f.
00147 { 00148 if (ast_format_register(&slin_f)) 00149 return AST_MODULE_LOAD_FAILURE; 00150 return AST_MODULE_LOAD_SUCCESS; 00151 }
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_log(), AST_LOG_WARNING, errno, ast_filestream::f, ast_frame::offset, and SEEK_FORCECUR.
00078 { 00079 off_t offset=0, min = 0, cur, max; 00080 00081 sample_offset <<= 1; 00082 00083 if ((cur = ftello(fs->f)) < 0) { 00084 ast_log(AST_LOG_WARNING, "Unable to determine current position in sln filestream %p: %s\n", fs, strerror(errno)); 00085 return -1; 00086 } 00087 00088 if (fseeko(fs->f, 0, SEEK_END) < 0) { 00089 ast_log(AST_LOG_WARNING, "Unable to seek to end of sln filestream %p: %s\n", fs, strerror(errno)); 00090 return -1; 00091 } 00092 00093 if ((max = ftello(fs->f)) < 0) { 00094 ast_log(AST_LOG_WARNING, "Unable to determine max position in sln filestream %p: %s\n", fs, strerror(errno)); 00095 return -1; 00096 } 00097 00098 if (whence == SEEK_SET) 00099 offset = sample_offset; 00100 else if (whence == SEEK_CUR || whence == SEEK_FORCECUR) 00101 offset = sample_offset + cur; 00102 else if (whence == SEEK_END) 00103 offset = max - sample_offset; 00104 if (whence != SEEK_FORCECUR) { 00105 offset = (offset > max)?max:offset; 00106 } 00107 /* always protect against seeking past begining. */ 00108 offset = (offset < min)?min:offset; 00109 return fseeko(fs->f, offset, SEEK_SET); 00110 }
static off_t slinear_tell | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 129 of file format_sln.c.
References ast_filestream::f.
00130 { 00131 return ftello(fs->f) / 2; 00132 }
static int slinear_trunc | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 112 of file format_sln.c.
References ast_log(), AST_LOG_WARNING, errno, and ast_filestream::f.
00113 { 00114 int fd; 00115 off_t cur; 00116 00117 if ((fd = fileno(fs->f)) < 0) { 00118 ast_log(AST_LOG_WARNING, "Unable to determine file descriptor for sln filestream %p: %s\n", fs, strerror(errno)); 00119 return -1; 00120 } 00121 if ((cur = ftello(fs->f)) < 0) { 00122 ast_log(AST_LOG_WARNING, "Unable to determine current position in sln filestream %p: %s\n", fs, strerror(errno)); 00123 return -1; 00124 } 00125 /* Truncate file to current length */ 00126 return ftruncate(fd, cur); 00127 }
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 153 of file format_sln.c.
References ast_format_unregister(), ast_format::name, and slin_f.
00154 { 00155 return ast_format_unregister(slin_f.name); 00156 }
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 = "ac1f6a56484a8820659555499174e588" , .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND } [static] |
Definition at line 162 of file format_sln.c.
struct ast_module_info* ast_module_info = &__mod_info [static] |
Definition at line 162 of file format_sln.c.
struct ast_format slin_f [static] |