Flat, binary, ADPCM vox file format. 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 80 |
#define | VOX_SAMPLES 160 |
Functions | |
AST_MODULE_INFO (ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER,"Dialogic VOX (ADPCM) File Format",.load=load_module,.unload=unload_module,.load_pri=AST_MODPRI_APP_DEPEND) | |
static int | load_module (void) |
static int | unload_module (void) |
static struct ast_frame * | vox_read (struct ast_filestream *s, int *whennext) |
static int | vox_seek (struct ast_filestream *fs, off_t sample_offset, int whence) |
static off_t | vox_tell (struct ast_filestream *fs) |
static int | vox_trunc (struct ast_filestream *fs) |
static int | vox_write (struct ast_filestream *s, struct ast_frame *f) |
Variables | |
static struct ast_format | vox_f |
Flat, binary, ADPCM vox file format.
Definition in file format_vox.c.
#define BUF_SIZE 80 |
Definition at line 39 of file format_vox.c.
#define VOX_SAMPLES 160 |
Definition at line 40 of file format_vox.c.
AST_MODULE_INFO | ( | ASTERISK_GPL_KEY | , | |
AST_MODFLAG_LOAD_ORDER | , | |||
"Dialogic VOX (ADPCM) File Format" | , | |||
. | load = load_module , |
|||
. | unload = unload_module , |
|||
. | load_pri = AST_MODPRI_APP_DEPEND | |||
) |
static int load_module | ( | void | ) | [static] |
Definition at line 149 of file format_vox.c.
References ast_format_register, AST_MODULE_LOAD_FAILURE, and AST_MODULE_LOAD_SUCCESS.
00150 { 00151 if (ast_format_register(&vox_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_vox.c.
References ast_format_unregister(), and ast_format::name.
00157 { 00158 return ast_format_unregister(vox_f.name); 00159 }
static struct ast_frame* vox_read | ( | struct ast_filestream * | s, | |
int * | whennext | |||
) | [static, read] |
Definition at line 42 of file format_vox.c.
References AST_FORMAT_ADPCM, 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.
00043 { 00044 int res; 00045 00046 /* Send a frame from the file to the appropriate channel */ 00047 s->fr.frametype = AST_FRAME_VOICE; 00048 s->fr.subclass.codec = AST_FORMAT_ADPCM; 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)) < 1) { 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 = res * 2; 00057 s->fr.datalen = res; 00058 return &s->fr; 00059 }
static int vox_seek | ( | struct ast_filestream * | fs, | |
off_t | sample_offset, | |||
int | whence | |||
) | [static] |
Definition at line 79 of file format_vox.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, distance; 00082 00083 if ((cur = ftello(fs->f)) < 0) { 00084 ast_log(AST_LOG_WARNING, "Unable to determine current position in g719 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 g719 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 g719 filestream %p: %s\n", fs, strerror(errno)); 00095 return -1; 00096 } 00097 00098 /* have to fudge to frame here, so not fully to sample */ 00099 distance = sample_offset/2; 00100 if (whence == SEEK_SET) { 00101 offset = distance; 00102 } else if (whence == SEEK_CUR || whence == SEEK_FORCECUR) { 00103 offset = distance + cur; 00104 } else if (whence == SEEK_END) { 00105 offset = max - distance; 00106 } 00107 if (whence != SEEK_FORCECUR) { 00108 offset = (offset > max)?max:offset; 00109 offset = (offset < min)?min:offset; 00110 } 00111 return fseeko(fs->f, offset, SEEK_SET); 00112 }
static off_t vox_tell | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 130 of file format_vox.c.
References ast_filestream::f, and ast_frame::offset.
00131 { 00132 off_t offset; 00133 offset = ftello(fs->f) << 1; 00134 return offset; 00135 }
static int vox_trunc | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 114 of file format_vox.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 vox 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 vox filestream %p: %s\n", fs, strerror(errno)); 00125 return -1; 00126 } 00127 /* Truncate file to current length */ 00128 return ftruncate(fd, cur);}
static int vox_write | ( | struct ast_filestream * | s, | |
struct ast_frame * | f | |||
) | [static] |
Definition at line 61 of file format_vox.c.
References AST_FORMAT_ADPCM, 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.
00062 { 00063 int res; 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_ADPCM) { 00069 ast_log(LOG_WARNING, "Asked to write non-ADPCM frame (%s)!\n", ast_getformatname(f->subclass.codec)); 00070 return -1; 00071 } 00072 if ((res = fwrite(f->data.ptr, 1, f->datalen, s->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 }
struct ast_format vox_f [static] |
Definition at line 137 of file format_vox.c.