Save to raw, headerless G729 data. 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 20 |
#define | G729A_SAMPLES 160 |
Functions | |
AST_MODULE_INFO (ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER,"Raw G.729 data",.load=load_module,.unload=unload_module,.load_pri=AST_MODPRI_APP_DEPEND) | |
static struct ast_frame * | g729_read (struct ast_filestream *s, int *whennext) |
static int | g729_seek (struct ast_filestream *fs, off_t sample_offset, int whence) |
static off_t | g729_tell (struct ast_filestream *fs) |
static int | g729_trunc (struct ast_filestream *fs) |
static int | g729_write (struct ast_filestream *fs, struct ast_frame *f) |
static int | load_module (void) |
static int | unload_module (void) |
Variables | |
static struct ast_format | g729_f |
Save to raw, headerless G729 data.
Definition in file format_g729.c.
#define BUF_SIZE 20 |
Definition at line 45 of file format_g729.c.
#define G729A_SAMPLES 160 |
Definition at line 46 of file format_g729.c.
Referenced by g729_read(), g729_seek(), and g729_tell().
AST_MODULE_INFO | ( | ASTERISK_GPL_KEY | , | |
AST_MODFLAG_LOAD_ORDER | , | |||
"Raw G.729 data" | , | |||
. | load = load_module , |
|||
. | unload = unload_module , |
|||
. | load_pri = AST_MODPRI_APP_DEPEND | |||
) |
static struct ast_frame* g729_read | ( | struct ast_filestream * | s, | |
int * | whennext | |||
) | [static, read] |
Definition at line 48 of file format_g729.c.
References AST_FORMAT_G729A, 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, G729A_SAMPLES, LOG_WARNING, ast_frame::mallocd, ast_frame::ptr, ast_frame::samples, and ast_frame::subclass.
00049 { 00050 int res; 00051 /* Send a frame from the file to the appropriate channel */ 00052 s->fr.frametype = AST_FRAME_VOICE; 00053 s->fr.subclass.codec = AST_FORMAT_G729A; 00054 s->fr.mallocd = 0; 00055 s->fr.samples = G729A_SAMPLES; 00056 AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, BUF_SIZE); 00057 if ((res = fread(s->fr.data.ptr, 1, s->fr.datalen, s->f)) != s->fr.datalen) { 00058 if (res && (res != 10)) /* XXX what for ? */ 00059 ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno)); 00060 return NULL; 00061 } 00062 *whennext = s->fr.samples; 00063 return &s->fr; 00064 }
static int g729_seek | ( | struct ast_filestream * | fs, | |
off_t | sample_offset, | |||
int | whence | |||
) | [static] |
Definition at line 88 of file format_g729.c.
References BUF_SIZE, ast_filestream::f, G729A_SAMPLES, ast_frame::offset, and SEEK_FORCECUR.
00089 { 00090 long bytes; 00091 off_t min,cur,max,offset=0; 00092 min = 0; 00093 cur = ftello(fs->f); 00094 fseeko(fs->f, 0, SEEK_END); 00095 max = ftello(fs->f); 00096 00097 bytes = BUF_SIZE * (sample_offset / G729A_SAMPLES); 00098 if (whence == SEEK_SET) 00099 offset = bytes; 00100 else if (whence == SEEK_CUR || whence == SEEK_FORCECUR) 00101 offset = cur + bytes; 00102 else if (whence == SEEK_END) 00103 offset = max - bytes; 00104 if (whence != SEEK_FORCECUR) { 00105 offset = (offset > max)?max:offset; 00106 } 00107 /* protect against seeking beyond begining. */ 00108 offset = (offset < min)?min:offset; 00109 if (fseeko(fs->f, offset, SEEK_SET) < 0) 00110 return -1; 00111 return 0; 00112 }
static off_t g729_tell | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 131 of file format_g729.c.
References BUF_SIZE, ast_filestream::f, G729A_SAMPLES, and ast_frame::offset.
00132 { 00133 off_t offset = ftello(fs->f); 00134 return (offset/BUF_SIZE)*G729A_SAMPLES; 00135 }
static int g729_trunc | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 114 of file format_g729.c.
References ast_log(), AST_LOG_WARNING, errno, and ast_filestream::f.
00115 { 00116 int fd; 00117 off_t cur; 00118 00119 if ((fd = fileno(fs->f)) < 0) { 00120 ast_log(AST_LOG_WARNING, "Unable to determine file descriptor for g729 filestream %p: %s\n", fs, strerror(errno)); 00121 return -1; 00122 } 00123 if ((cur = ftello(fs->f)) < 0) { 00124 ast_log(AST_LOG_WARNING, "Unable to determine current position in g729 filestream %p: %s\n", fs, strerror(errno)); 00125 return -1; 00126 } 00127 /* Truncate file to current length */ 00128 return ftruncate(fd, cur); 00129 }
static int g729_write | ( | struct ast_filestream * | fs, | |
struct ast_frame * | f | |||
) | [static] |
Definition at line 66 of file format_g729.c.
References AST_FORMAT_G729A, 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.
00067 { 00068 int res; 00069 if (f->frametype != AST_FRAME_VOICE) { 00070 ast_log(LOG_WARNING, "Asked to write non-voice frame!\n"); 00071 return -1; 00072 } 00073 if (f->subclass.codec != AST_FORMAT_G729A) { 00074 ast_log(LOG_WARNING, "Asked to write non-G729 frame (%s)!\n", ast_getformatname(f->subclass.codec)); 00075 return -1; 00076 } 00077 if (f->datalen % 10) { 00078 ast_log(LOG_WARNING, "Invalid data length, %d, should be multiple of 10\n", f->datalen); 00079 return -1; 00080 } 00081 if ((res = fwrite(f->data.ptr, 1, f->datalen, fs->f)) != f->datalen) { 00082 ast_log(LOG_WARNING, "Bad write (%d/10): %s\n", res, strerror(errno)); 00083 return -1; 00084 } 00085 return 0; 00086 }
static int load_module | ( | void | ) | [static] |
Definition at line 149 of file format_g729.c.
References ast_format_register, AST_MODULE_LOAD_FAILURE, and AST_MODULE_LOAD_SUCCESS.
00150 { 00151 if (ast_format_register(&g729_f)) 00152 return AST_MODULE_LOAD_FAILURE; 00153 return AST_MODULE_LOAD_SUCCESS; 00154 }
static int unload_module | ( | void | ) | [static] |
Definition at line 156 of file format_g729.c.
References ast_format_unregister(), and ast_format::name.
00157 { 00158 return ast_format_unregister(g729_f.name); 00159 }
struct ast_format g729_f [static] |
Definition at line 137 of file format_g729.c.