ITU G.722.1 Annex C (Siren14, licensed from Polycom) format, 48kbps bitrate only. More...
#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 120 |
#define | BYTES_TO_SAMPLES(x) ((typeof(x)) x * ((float) 640 / 120)) |
#define | SAMPLES_TO_BYTES(x) ((typeof(x)) x / ((float) 640 / 120)) |
Functions | |
AST_MODULE_INFO (ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER,"ITU G.722.1 Annex C (Siren14, licensed from Polycom)",.load=load_module,.unload=unload_module,.load_pri=AST_MODPRI_APP_DEPEND) | |
static int | load_module (void) |
static struct ast_frame * | siren14read (struct ast_filestream *s, int *whennext) |
static int | siren14seek (struct ast_filestream *fs, off_t sample_offset, int whence) |
static off_t | siren14tell (struct ast_filestream *fs) |
static int | siren14trunc (struct ast_filestream *fs) |
static int | siren14write (struct ast_filestream *fs, struct ast_frame *f) |
static int | unload_module (void) |
Variables | |
static struct ast_format | siren14_f |
ITU G.722.1 Annex C (Siren14, licensed from Polycom) format, 48kbps bitrate only.
Definition in file format_siren14.c.
#define BUF_SIZE 120 |
Definition at line 38 of file format_siren14.c.
#define BYTES_TO_SAMPLES | ( | x | ) | ((typeof(x)) x * ((float) 640 / 120)) |
Definition at line 40 of file format_siren14.c.
#define SAMPLES_TO_BYTES | ( | x | ) | ((typeof(x)) x / ((float) 640 / 120)) |
Definition at line 39 of file format_siren14.c.
AST_MODULE_INFO | ( | ASTERISK_GPL_KEY | , | |
AST_MODFLAG_LOAD_ORDER | , | |||
"ITU G.722.1 Annex C (Siren14, licensed from Polycom)" | , | |||
. | load = load_module , |
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. | unload = unload_module , |
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. | load_pri = AST_MODPRI_APP_DEPEND | |||
) |
static int load_module | ( | void | ) | [static] |
Definition at line 150 of file format_siren14.c.
References ast_format_register, AST_MODULE_LOAD_DECLINE, and AST_MODULE_LOAD_SUCCESS.
00151 { 00152 if (ast_format_register(&siren14_f)) 00153 return AST_MODULE_LOAD_DECLINE; 00154 00155 return AST_MODULE_LOAD_SUCCESS; 00156 }
static struct ast_frame* siren14read | ( | struct ast_filestream * | s, | |
int * | whennext | |||
) | [static, read] |
Definition at line 42 of file format_siren14.c.
References AST_FORMAT_SIREN14, AST_FRAME_SET_BUFFER, AST_FRAME_VOICE, AST_FRIENDLY_OFFSET, ast_log(), ast_filestream::buf, BUF_SIZE, BYTES_TO_SAMPLES, 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.
00043 { 00044 int res; 00045 /* Send a frame from the file to the appropriate channel */ 00046 00047 s->fr.frametype = AST_FRAME_VOICE; 00048 s->fr.subclass.codec = AST_FORMAT_SIREN14; 00049 s->fr.mallocd = 0; 00050 AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, BUF_SIZE); 00051 if ((res = fread(s->fr.data.ptr, 1, s->fr.datalen, s->f)) != s->fr.datalen) { 00052 if (res) 00053 ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno)); 00054 return NULL; 00055 } 00056 *whennext = s->fr.samples = BYTES_TO_SAMPLES(res); 00057 return &s->fr; 00058 }
static int siren14seek | ( | struct ast_filestream * | fs, | |
off_t | sample_offset, | |||
int | whence | |||
) | [static] |
Definition at line 79 of file format_siren14.c.
References ast_log(), AST_LOG_WARNING, errno, ast_filestream::f, ast_frame::offset, SAMPLES_TO_BYTES, and SEEK_FORCECUR.
00080 { 00081 off_t offset = 0, min = 0, cur, max; 00082 00083 sample_offset = SAMPLES_TO_BYTES(sample_offset); 00084 00085 if ((cur = ftello(fs->f)) < 0) { 00086 ast_log(AST_LOG_WARNING, "Unable to determine current position in siren14 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 siren14 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 siren14 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 siren14tell | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 133 of file format_siren14.c.
References BYTES_TO_SAMPLES, and ast_filestream::f.
00134 { 00135 return BYTES_TO_SAMPLES(ftello(fs->f)); 00136 }
static int siren14trunc | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 116 of file format_siren14.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 siren14 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 siren14 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 siren14write | ( | struct ast_filestream * | fs, | |
struct ast_frame * | f | |||
) | [static] |
Definition at line 60 of file format_siren14.c.
References AST_FORMAT_SIREN14, AST_FRAME_VOICE, ast_getformatname(), ast_log(), ast_frame_subclass::codec, ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, ast_frame::frametype, LOG_WARNING, ast_frame::ptr, and ast_frame::subclass.
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_SIREN14) { 00069 ast_log(LOG_WARNING, "Asked to write non-Siren14 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_siren14.c.
References ast_format_unregister(), and ast_format::name.
00159 { 00160 return ast_format_unregister(siren14_f.name); 00161 }
struct ast_format siren14_f [static] |
Definition at line 138 of file format_siren14.c.