Old-style G.723.1 frame/timestamp format. More...
#include "asterisk.h"
#include "asterisk/mod_format.h"
#include "asterisk/module.h"
Go to the source code of this file.
Defines | |
#define | G723_MAX_SIZE 1024 |
Functions | |
AST_MODULE_INFO (ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER,"G.723.1 Simple Timestamp File Format",.load=load_module,.unload=unload_module,.load_pri=AST_MODPRI_APP_DEPEND) | |
static struct ast_frame * | g723_read (struct ast_filestream *s, int *whennext) |
static int | g723_seek (struct ast_filestream *fs, off_t sample_offset, int whence) |
static off_t | g723_tell (struct ast_filestream *fs) |
static int | g723_trunc (struct ast_filestream *fs) |
static int | g723_write (struct ast_filestream *s, struct ast_frame *f) |
static int | load_module (void) |
static int | unload_module (void) |
Variables | |
static struct ast_format | g723_1_f |
Old-style G.723.1 frame/timestamp format.
Definition in file format_g723.c.
#define G723_MAX_SIZE 1024 |
Definition at line 39 of file format_g723.c.
Referenced by g723_read().
AST_MODULE_INFO | ( | ASTERISK_GPL_KEY | , | |
AST_MODFLAG_LOAD_ORDER | , | |||
"G.723.1 Simple Timestamp File Format" | , | |||
. | load = load_module , |
|||
. | unload = unload_module , |
|||
. | load_pri = AST_MODPRI_APP_DEPEND | |||
) |
static struct ast_frame* g723_read | ( | struct ast_filestream * | s, | |
int * | whennext | |||
) | [static, read] |
Definition at line 41 of file format_g723.c.
References AST_FORMAT_G723_1, AST_FRAME_SET_BUFFER, AST_FRAME_VOICE, AST_FRIENDLY_OFFSET, ast_log(), ast_filestream::buf, ast_frame_subclass::codec, ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, ast_filestream::fr, ast_frame::frametype, G723_MAX_SIZE, LOG_WARNING, ast_frame::mallocd, ast_frame::ptr, ast_frame::samples, and ast_frame::subclass.
00042 { 00043 unsigned short size; 00044 int res; 00045 int delay; 00046 /* Read the delay for the next packet, and schedule again if necessary */ 00047 /* XXX is this ignored ? */ 00048 if (fread(&delay, 1, 4, s->f) == 4) 00049 delay = ntohl(delay); 00050 else 00051 delay = -1; 00052 if (fread(&size, 1, 2, s->f) != 2) { 00053 /* Out of data, or the file is no longer valid. In any case 00054 go ahead and stop the stream */ 00055 return NULL; 00056 } 00057 /* Looks like we have a frame to read from here */ 00058 size = ntohs(size); 00059 if (size > G723_MAX_SIZE) { 00060 ast_log(LOG_WARNING, "Size %d is invalid\n", size); 00061 /* The file is apparently no longer any good, as we 00062 shouldn't ever get frames even close to this 00063 size. */ 00064 return NULL; 00065 } 00066 /* Read the data into the buffer */ 00067 s->fr.frametype = AST_FRAME_VOICE; 00068 s->fr.subclass.codec = AST_FORMAT_G723_1; 00069 s->fr.mallocd = 0; 00070 AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, size); 00071 if ((res = fread(s->fr.data.ptr, 1, s->fr.datalen, s->f)) != size) { 00072 ast_log(LOG_WARNING, "Short read (%d of %d bytes) (%s)!\n", res, size, strerror(errno)); 00073 return NULL; 00074 } 00075 *whennext = s->fr.samples = 240; 00076 return &s->fr; 00077 }
static int g723_seek | ( | struct ast_filestream * | fs, | |
off_t | sample_offset, | |||
int | whence | |||
) | [static] |
Definition at line 114 of file format_g723.c.
static off_t g723_tell | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 136 of file format_g723.c.
static int g723_trunc | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 119 of file format_g723.c.
References ast_log(), AST_LOG_WARNING, errno, and ast_filestream::f.
00120 { 00121 int fd; 00122 off_t cur; 00123 00124 if ((fd = fileno(fs->f)) < 0) { 00125 ast_log(AST_LOG_WARNING, "Unable to determine file descriptor for g723 filestream %p: %s\n", fs, strerror(errno)); 00126 return -1; 00127 } 00128 if ((cur = ftello(fs->f)) < 0) { 00129 ast_log(AST_LOG_WARNING, "Unable to determine current position in g723 filestream %p: %s\n", fs, strerror(errno)); 00130 return -1; 00131 } 00132 /* Truncate file to current length */ 00133 return ftruncate(fd, cur); 00134 }
static int g723_write | ( | struct ast_filestream * | s, | |
struct ast_frame * | f | |||
) | [static] |
Definition at line 79 of file format_g723.c.
References AST_FORMAT_G723_1, AST_FRAME_VOICE, 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.
00080 { 00081 uint32_t delay; 00082 uint16_t size; 00083 int res; 00084 /* XXX there used to be a check s->fr means a read stream */ 00085 if (f->frametype != AST_FRAME_VOICE) { 00086 ast_log(LOG_WARNING, "Asked to write non-voice frame!\n"); 00087 return -1; 00088 } 00089 if (f->subclass.codec != AST_FORMAT_G723_1) { 00090 ast_log(LOG_WARNING, "Asked to write non-g723 frame!\n"); 00091 return -1; 00092 } 00093 delay = 0; 00094 if (f->datalen <= 0) { 00095 ast_log(LOG_WARNING, "Short frame ignored (%d bytes long?)\n", f->datalen); 00096 return 0; 00097 } 00098 if ((res = fwrite(&delay, 1, 4, s->f)) != 4) { 00099 ast_log(LOG_WARNING, "Unable to write delay: res=%d (%s)\n", res, strerror(errno)); 00100 return -1; 00101 } 00102 size = htons(f->datalen); 00103 if ((res = fwrite(&size, 1, 2, s->f)) != 2) { 00104 ast_log(LOG_WARNING, "Unable to write size: res=%d (%s)\n", res, strerror(errno)); 00105 return -1; 00106 } 00107 if ((res = fwrite(f->data.ptr, 1, f->datalen, s->f)) != f->datalen) { 00108 ast_log(LOG_WARNING, "Unable to write frame: res=%d (%s)\n", res, strerror(errno)); 00109 return -1; 00110 } 00111 return 0; 00112 }
static int load_module | ( | void | ) | [static] |
Definition at line 153 of file format_g723.c.
References ast_format_register, AST_MODULE_LOAD_FAILURE, and AST_MODULE_LOAD_SUCCESS.
00154 { 00155 if (ast_format_register(&g723_1_f)) 00156 return AST_MODULE_LOAD_FAILURE; 00157 return AST_MODULE_LOAD_SUCCESS; 00158 }
static int unload_module | ( | void | ) | [static] |
Definition at line 160 of file format_g723.c.
References ast_format_unregister(), and ast_format::name.
00161 { 00162 return ast_format_unregister(g723_1_f.name); 00163 }
struct ast_format g723_1_f [static] |
Definition at line 141 of file format_g723.c.