Wed Jan 8 2020 09:50:12

Asterisk developer's documentation


format_h263.c File Reference

Save to raw, headerless h263 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.

Data Structures

struct  h263_desc
 

Macros

#define BUF_SIZE   32768 /* Four real h.263 Frames */
 

Functions

static void __reg_module (void)
 
static void __unreg_module (void)
 
static int h263_open (struct ast_filestream *s)
 
static struct ast_frameh263_read (struct ast_filestream *s, int *whennext)
 
static int h263_seek (struct ast_filestream *fs, off_t sample_offset, int whence)
 
static off_t h263_tell (struct ast_filestream *fs)
 
static int h263_trunc (struct ast_filestream *fs)
 
static int h263_write (struct ast_filestream *fs, struct ast_frame *f)
 
static int load_module (void)
 
static int unload_module (void)
 

Variables

static struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Raw H.263 data" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = "ac1f6a56484a8820659555499174e588" , .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND }
 
static struct ast_module_infoast_module_info = &__mod_info
 
static struct ast_format h263_f
 

Detailed Description

Save to raw, headerless h263 data.

  • File name extension: h263

Definition in file format_h263.c.

Macro Definition Documentation

#define BUF_SIZE   32768 /* Four real h.263 Frames */

Definition at line 49 of file format_h263.c.

Referenced by h263_read().

Function Documentation

static void __reg_module ( void  )
static

Definition at line 203 of file format_h263.c.

static void __unreg_module ( void  )
static

Definition at line 203 of file format_h263.c.

static int h263_open ( struct ast_filestream s)
static

Definition at line 56 of file format_h263.c.

References ast_log(), ast_filestream::f, and LOG_WARNING.

57 {
58  unsigned int ts;
59  int res;
60 
61  if ((res = fread(&ts, 1, sizeof(ts), s->f)) < sizeof(ts)) {
62  ast_log(LOG_WARNING, "Empty file!\n");
63  return -1;
64  }
65  return 0;
66 }
#define LOG_WARNING
Definition: logger.h:144
void ast_log(int level, const char *file, int line, const char *function, const char *fmt,...)
Used for sending a log message This is the standard logger function. Probably the only way you will i...
Definition: logger.c:1207
static struct ast_frame* h263_read ( struct ast_filestream s,
int *  whennext 
)
static

Definition at line 68 of file format_h263.c.

References ast_filestream::_private, AST_FORMAT_H263, AST_FRAME_SET_BUFFER, AST_FRAME_VIDEO, AST_FRIENDLY_OFFSET, ast_log(), ast_filestream::buf, BUF_SIZE, ast_frame_subclass::codec, ast_frame::data, ast_frame::datalen, ast_frame::delivery, errno, ast_filestream::f, ast_filestream::fr, ast_frame::frametype, if(), h263_desc::lastts, len(), LOG_WARNING, ast_frame::mallocd, ast_frame::ptr, ast_frame::samples, ast_frame::subclass, and ast_frame::ts.

69 {
70  int res;
71  format_t mark;
72  unsigned short len;
73  unsigned int ts;
74  struct h263_desc *fs = (struct h263_desc *)s->_private;
75 
76  /* Send a frame from the file to the appropriate channel */
77  if ((res = fread(&len, 1, sizeof(len), s->f)) < 1)
78  return NULL;
79  len = ntohs(len);
80  mark = (len & 0x8000) ? 1 : 0;
81  len &= 0x7fff;
82  if (len > BUF_SIZE) {
83  ast_log(LOG_WARNING, "Length %d is too long\n", len);
84  return NULL;
85  }
88  s->fr.mallocd = 0;
90  if ((res = fread(s->fr.data.ptr, 1, s->fr.datalen, s->f)) != s->fr.datalen) {
91  if (res)
92  ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno));
93  return NULL;
94  }
95  s->fr.samples = fs->lastts; /* XXX what ? */
96  s->fr.datalen = len;
97  s->fr.subclass.codec |= mark;
98  s->fr.delivery.tv_sec = 0;
99  s->fr.delivery.tv_usec = 0;
100  if ((res = fread(&ts, 1, sizeof(ts), s->f)) == sizeof(ts)) {
101  fs->lastts = ntohl(ts);
102  *whennext = fs->lastts * 4/45;
103  } else
104  *whennext = 0;
105  return &s->fr;
106 }
union ast_frame_subclass subclass
Definition: frame.h:146
unsigned int lastts
Definition: format_h263.c:52
void * ptr
Definition: frame.h:160
#define LOG_WARNING
Definition: logger.h:144
format_t codec
Definition: frame.h:137
#define AST_FRAME_SET_BUFFER(fr, _base, _ofs, _datalen)
Definition: frame.h:183
#define AST_FRIENDLY_OFFSET
Offset into a frame&#39;s data buffer.
Definition: frame.h:204
int datalen
Definition: frame.h:148
struct ast_frame fr
Definition: mod_format.h:117
#define AST_FORMAT_H263
Definition: frame.h:283
void * _private
Definition: mod_format.h:119
int64_t format_t
Definition: frame_defs.h:32
static int len(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t buflen)
void ast_log(int level, const char *file, int line, const char *function, const char *fmt,...)
Used for sending a log message This is the standard logger function. Probably the only way you will i...
Definition: logger.c:1207
int errno
if(yyss+yystacksize-1<=yyssp)
Definition: ast_expr2.c:1874
struct timeval delivery
Definition: frame.h:162
int mallocd
Definition: frame.h:152
#define BUF_SIZE
Definition: format_h263.c:49
enum ast_frame_type frametype
Definition: frame.h:144
union ast_frame::@172 data
int samples
Definition: frame.h:150
static int h263_seek ( struct ast_filestream fs,
off_t  sample_offset,
int  whence 
)
static

Definition at line 144 of file format_h263.c.

145 {
146  /* No way Jose */
147  return -1;
148 }
static off_t h263_tell ( struct ast_filestream fs)
static

Definition at line 167 of file format_h263.c.

References ast_filestream::f.

168 {
169  off_t offset = ftello(fs->f);
170  return offset; /* XXX totally bogus, needs fixing */
171 }
static int h263_trunc ( struct ast_filestream fs)
static

Definition at line 150 of file format_h263.c.

References ast_log(), AST_LOG_WARNING, errno, and ast_filestream::f.

151 {
152  int fd;
153  off_t cur;
154 
155  if ((fd = fileno(fs->f)) < 0) {
156  ast_log(AST_LOG_WARNING, "Unable to determine file descriptor for h263 filestream %p: %s\n", fs, strerror(errno));
157  return -1;
158  }
159  if ((cur = ftello(fs->f)) < 0) {
160  ast_log(AST_LOG_WARNING, "Unable to determine current position in h263 filestream %p: %s\n", fs, strerror(errno));
161  return -1;
162  }
163  /* Truncate file to current length */
164  return ftruncate(fd, cur);
165 }
#define AST_LOG_WARNING
Definition: logger.h:149
void ast_log(int level, const char *file, int line, const char *function, const char *fmt,...)
Used for sending a log message This is the standard logger function. Probably the only way you will i...
Definition: logger.c:1207
int errno
static int h263_write ( struct ast_filestream fs,
struct ast_frame f 
)
static

Definition at line 108 of file format_h263.c.

References AST_FORMAT_H263, AST_FRAME_VIDEO, ast_getformatname(), ast_log(), ast_frame_subclass::codec, ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, ast_frame::frametype, len(), LOG_WARNING, ast_frame::ptr, ast_frame::samples, and ast_frame::subclass.

109 {
110  int res;
111  unsigned int ts;
112  unsigned short len;
113  format_t subclass;
114  format_t mark=0;
115  if (f->frametype != AST_FRAME_VIDEO) {
116  ast_log(LOG_WARNING, "Asked to write non-video frame!\n");
117  return -1;
118  }
119  subclass = f->subclass.codec;
120  if (subclass & 0x1)
121  mark=0x8000;
122  subclass &= ~0x1;
123  if (subclass != AST_FORMAT_H263) {
124  ast_log(LOG_WARNING, "Asked to write non-h263 frame (%s)!\n", ast_getformatname(f->subclass.codec));
125  return -1;
126  }
127  ts = htonl(f->samples);
128  if ((res = fwrite(&ts, 1, sizeof(ts), fs->f)) != sizeof(ts)) {
129  ast_log(LOG_WARNING, "Bad write (%d/4): %s\n", res, strerror(errno));
130  return -1;
131  }
132  len = htons(f->datalen | mark);
133  if ((res = fwrite(&len, 1, sizeof(len), fs->f)) != sizeof(len)) {
134  ast_log(LOG_WARNING, "Bad write (%d/2): %s\n", res, strerror(errno));
135  return -1;
136  }
137  if ((res = fwrite(f->data.ptr, 1, f->datalen, fs->f)) != f->datalen) {
138  ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno));
139  return -1;
140  }
141  return 0;
142 }
union ast_frame_subclass subclass
Definition: frame.h:146
void * ptr
Definition: frame.h:160
#define LOG_WARNING
Definition: logger.h:144
format_t codec
Definition: frame.h:137
int datalen
Definition: frame.h:148
#define AST_FORMAT_H263
Definition: frame.h:283
char * ast_getformatname(format_t format)
Get the name of a format.
Definition: frame.c:578
int64_t format_t
Definition: frame_defs.h:32
static int len(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t buflen)
void ast_log(int level, const char *file, int line, const char *function, const char *fmt,...)
Used for sending a log message This is the standard logger function. Probably the only way you will i...
Definition: logger.c:1207
int errno
enum ast_frame_type frametype
Definition: frame.h:144
union ast_frame::@172 data
int samples
Definition: frame.h:150
static int load_module ( void  )
static

Definition at line 187 of file format_h263.c.

References ast_format_register, AST_MODULE_LOAD_FAILURE, and AST_MODULE_LOAD_SUCCESS.

188 {
192 }
#define ast_format_register(f)
Definition: mod_format.h:131
static struct ast_format h263_f
Definition: format_h263.c:173
static int unload_module ( void  )
static

Definition at line 194 of file format_h263.c.

References ast_format_unregister(), and ast_format::name.

195 {
197 }
static struct ast_format h263_f
Definition: format_h263.c:173
int ast_format_unregister(const char *name)
Unregisters a file format.
Definition: file.c:104
char name[80]
Definition: mod_format.h:44

Variable Documentation

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Raw H.263 data" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = "ac1f6a56484a8820659555499174e588" , .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND }
static

Definition at line 203 of file format_h263.c.

Definition at line 203 of file format_h263.c.

struct ast_format h263_f
static

Definition at line 173 of file format_h263.c.