#include "asterisk.h"
#include <unistd.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <sys/time.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include "asterisk/lock.h"
#include "asterisk/channel.h"
#include "asterisk/file.h"
#include "asterisk/logger.h"
#include "asterisk/sched.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 | |
AST_MODULE_INFO_STANDARD (ASTERISK_GPL_KEY,"Raw Signed Linear Audio support (SLN)") | |
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_format | slin_f |
Definition in file format_sln.c.
#define BUF_SIZE 320 |
Definition at line 46 of file format_sln.c.
#define SLIN_SAMPLES 160 |
Definition at line 47 of file format_sln.c.
AST_MODULE_INFO_STANDARD | ( | ASTERISK_GPL_KEY | , | |
"Raw Signed Linear Audio support (SLN)" | ||||
) |
static int load_module | ( | void | ) | [static] |
Definition at line 131 of file format_sln.c.
References ast_format_register.
00132 { 00133 return ast_format_register(&slin_f); 00134 }
static struct ast_frame* slinear_read | ( | struct ast_filestream * | s, | |
int * | whennext | |||
) | [static, read] |
Definition at line 49 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::data, ast_frame::datalen, errno, ast_filestream::f, ast_filestream::fr, ast_frame::frametype, LOG_WARNING, ast_frame::mallocd, ast_frame::samples, and ast_frame::subclass.
00050 { 00051 int res; 00052 /* Send a frame from the file to the appropriate channel */ 00053 00054 s->fr.frametype = AST_FRAME_VOICE; 00055 s->fr.subclass = AST_FORMAT_SLINEAR; 00056 s->fr.mallocd = 0; 00057 AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, BUF_SIZE); 00058 if ((res = fread(s->fr.data, 1, s->fr.datalen, s->f)) < 1) { 00059 if (res) 00060 ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno)); 00061 return NULL; 00062 } 00063 *whennext = s->fr.samples = res/2; 00064 s->fr.datalen = res; 00065 return &s->fr; 00066 }
static int slinear_seek | ( | struct ast_filestream * | fs, | |
off_t | sample_offset, | |||
int | whence | |||
) | [static] |
Definition at line 86 of file format_sln.c.
References ast_filestream::f, offset, and SEEK_FORCECUR.
00087 { 00088 off_t offset=0,min,cur,max; 00089 00090 min = 0; 00091 sample_offset <<= 1; 00092 cur = ftello(fs->f); 00093 fseeko(fs->f, 0, SEEK_END); 00094 max = ftello(fs->f); 00095 if (whence == SEEK_SET) 00096 offset = sample_offset; 00097 else if (whence == SEEK_CUR || whence == SEEK_FORCECUR) 00098 offset = sample_offset + cur; 00099 else if (whence == SEEK_END) 00100 offset = max - sample_offset; 00101 if (whence != SEEK_FORCECUR) { 00102 offset = (offset > max)?max:offset; 00103 } 00104 /* always protect against seeking past begining. */ 00105 offset = (offset < min)?min:offset; 00106 return fseeko(fs->f, offset, SEEK_SET); 00107 }
static off_t slinear_tell | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 114 of file format_sln.c.
References ast_filestream::f.
00115 { 00116 return ftello(fs->f) / 2; 00117 }
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 68 of file format_sln.c.
References AST_FORMAT_SLINEAR, AST_FRAME_VOICE, ast_log(), ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, ast_frame::frametype, LOG_WARNING, and ast_frame::subclass.
00069 { 00070 int res; 00071 if (f->frametype != AST_FRAME_VOICE) { 00072 ast_log(LOG_WARNING, "Asked to write non-voice frame!\n"); 00073 return -1; 00074 } 00075 if (f->subclass != AST_FORMAT_SLINEAR) { 00076 ast_log(LOG_WARNING, "Asked to write non-slinear frame (%d)!\n", f->subclass); 00077 return -1; 00078 } 00079 if ((res = fwrite(f->data, 1, f->datalen, fs->f)) != f->datalen) { 00080 ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno)); 00081 return -1; 00082 } 00083 return 0; 00084 }
static int unload_module | ( | void | ) | [static] |
Definition at line 136 of file format_sln.c.
References ast_format_unregister(), and ast_format::name.
00137 { 00138 return ast_format_unregister(slin_f.name); 00139 }
struct ast_format slin_f [static] |
Definition at line 119 of file format_sln.c.