Asterisk - The Open Source Telephony Project  GIT-master-8beac82
Data Structures | Macros | Functions | Variables
format_h264.c File Reference

Save to raw, headerless h264 data. More...

#include "asterisk.h"
#include "asterisk/mod_format.h"
#include "asterisk/module.h"
#include "asterisk/endian.h"
#include "asterisk/format_cache.h"

Go to the source code of this file.

Data Structures

struct  h264_desc
 

Macros

#define BUF_SIZE   4096 /* Two Real h264 Frames */
 
#define FRAME_ENDED   0x8000
 

Functions

static void __reg_module (void)
 
static void __unreg_module (void)
 
struct ast_moduleAST_MODULE_SELF_SYM (void)
 
static int h264_open (struct ast_filestream *s)
 
static struct ast_frameh264_read (struct ast_filestream *s, int *whennext)
 
static int h264_seek (struct ast_filestream *fs, off_t sample_offset, int whence)
 
static off_t h264_tell (struct ast_filestream *fs)
 
static int h264_trunc (struct ast_filestream *fs)
 
static int h264_write (struct ast_filestream *s, 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.264 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 = AST_BUILDOPT_SUM, .support_level = AST_MODULE_SUPPORT_CORE, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND }
 
static const struct ast_module_infoast_module_info = &__mod_info
 
static struct ast_format_def h264_f
 

Detailed Description

Save to raw, headerless h264 data.

Definition in file format_h264.c.

Macro Definition Documentation

◆ BUF_SIZE

#define BUF_SIZE   4096 /* Two Real h264 Frames */

Definition at line 45 of file format_h264.c.

Referenced by h264_read().

◆ FRAME_ENDED

#define FRAME_ENDED   0x8000
Todo:
Check this buf size estimate, it may be totally wrong for large frame video

Definition at line 43 of file format_h264.c.

Referenced by h264_read(), and h264_write().

Function Documentation

◆ __reg_module()

static void __reg_module ( void  )
static

Definition at line 183 of file format_h264.c.

◆ __unreg_module()

static void __unreg_module ( void  )
static

Definition at line 183 of file format_h264.c.

◆ AST_MODULE_SELF_SYM()

struct ast_module* AST_MODULE_SELF_SYM ( void  )

Definition at line 183 of file format_h264.c.

◆ h264_open()

static int h264_open ( struct ast_filestream s)
static

Definition at line 50 of file format_h264.c.

References ast_log, ast_filestream::f, and LOG_WARNING.

51 {
52  unsigned int ts;
53  if (fread(&ts, 1, sizeof(ts), s->f) != sizeof(ts)) {
54  ast_log(LOG_WARNING, "Empty file!\n");
55  return -1;
56  }
57  return 0;
58 }
#define LOG_WARNING
Definition: logger.h:274
#define ast_log
Definition: astobj2.c:42

◆ h264_read()

static struct ast_frame* h264_read ( struct ast_filestream s,
int *  whennext 
)
static

Definition at line 60 of file format_h264.c.

References ast_filestream::_private, ast_format_get_name(), AST_FRAME_SET_BUFFER, AST_FRIENDLY_OFFSET, ast_log, ast_filestream::buf, BUF_SIZE, ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, ast_frame_subclass::format, ast_filestream::fr, FRAME_ENDED, ast_frame_subclass::frame_ending, if(), h264_desc::lastts, len(), LOG_WARNING, NULL, ast_frame::ptr, ast_frame::samples, ast_frame::subclass, and ast_frame::ts.

61 {
62  size_t res;
63  int mark = 0;
64  unsigned short len;
65  unsigned int ts;
66  struct h264_desc *fs = (struct h264_desc *)s->_private;
67 
68  /* Send a frame from the file to the appropriate channel */
69  if ((res = fread(&len, 1, sizeof(len), s->f)) != sizeof(len))
70  return NULL;
71  len = ntohs(len);
72  mark = (len & FRAME_ENDED) ? 1 : 0;
73  len &= 0x7fff;
74  if (len > BUF_SIZE) {
75  ast_log(LOG_WARNING, "Length %d is too long\n", len);
76  len = BUF_SIZE; /* XXX truncate */
77  }
79  if ((res = fread(s->fr.data.ptr, 1, s->fr.datalen, s->f)) != s->fr.datalen) {
80  if (res) {
81  ast_log(LOG_WARNING, "Short read of %s data (expected %d bytes, read %zu): %s\n",
83  strerror(errno));
84  }
85  return NULL;
86  }
87  s->fr.samples = fs->lastts;
88  s->fr.datalen = len;
89  s->fr.subclass.frame_ending = mark;
90  if ((res = fread(&ts, 1, sizeof(ts), s->f)) == sizeof(ts)) {
91  fs->lastts = ntohl(ts);
92  *whennext = fs->lastts * 4/45;
93  } else
94  *whennext = 0;
95  return &s->fr;
96 }
#define BUF_SIZE
Definition: format_h264.c:45
#define LOG_WARNING
Definition: logger.h:274
if(!yyg->yy_init)
Definition: ast_expr2f.c:868
const char * ast_format_get_name(const struct ast_format *format)
Get the name associated with a format.
Definition: format.c:334
#define NULL
Definition: resample.c:96
struct ast_frame_subclass subclass
#define ast_log
Definition: astobj2.c:42
#define AST_FRIENDLY_OFFSET
Offset into a frame's data buffer.
union ast_frame::@250 data
struct ast_frame fr
frame produced by read, typically
Definition: mod_format.h:122
#define FRAME_ENDED
Definition: format_h264.c:43
void * _private
Definition: mod_format.h:124
#define AST_FRAME_SET_BUFFER(fr, _base, _ofs, _datalen)
static int len(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t buflen)
int errno
unsigned int lastts
Definition: format_h264.c:47
struct ast_format * format

◆ h264_seek()

static int h264_seek ( struct ast_filestream fs,
off_t  sample_offset,
int  whence 
)
static

Definition at line 123 of file format_h264.c.

124 {
125  /* No way Jose */
126  return -1;
127 }

◆ h264_tell()

static off_t h264_tell ( struct ast_filestream fs)
static

Definition at line 146 of file format_h264.c.

References ast_filestream::f.

147 {
148  off_t offset = ftell(fs->f);
149  return offset; /* XXX totally bogus, needs fixing */
150 }

◆ h264_trunc()

static int h264_trunc ( struct ast_filestream fs)
static

Definition at line 129 of file format_h264.c.

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

130 {
131  int fd;
132  off_t cur;
133 
134  if ((fd = fileno(fs->f)) < 0) {
135  ast_log(AST_LOG_WARNING, "Unable to determine file descriptor for h264 filestream %p: %s\n", fs, strerror(errno));
136  return -1;
137  }
138  if ((cur = ftello(fs->f)) < 0) {
139  ast_log(AST_LOG_WARNING, "Unable to determine current position in h264 filestream %p: %s\n", fs, strerror(errno));
140  return -1;
141  }
142  /* Truncate file to current length */
143  return ftruncate(fd, cur);
144 }
#define AST_LOG_WARNING
Definition: logger.h:279
#define ast_log
Definition: astobj2.c:42
int errno

◆ h264_write()

static int h264_write ( struct ast_filestream s,
struct ast_frame f 
)
static

Definition at line 98 of file format_h264.c.

References ast_log, ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, FRAME_ENDED, ast_frame_subclass::frame_ending, len(), LOG_WARNING, ast_frame::ptr, ast_frame::samples, and ast_frame::subclass.

99 {
100  int res;
101  unsigned int ts;
102  unsigned short len;
103  int mark;
104 
105  mark = f->subclass.frame_ending ? FRAME_ENDED : 0;
106  ts = htonl(f->samples);
107  if ((res = fwrite(&ts, 1, sizeof(ts), s->f)) != sizeof(ts)) {
108  ast_log(LOG_WARNING, "Bad write (%d/4): %s\n", res, strerror(errno));
109  return -1;
110  }
111  len = htons(f->datalen | mark);
112  if ((res = fwrite(&len, 1, sizeof(len), s->f)) != sizeof(len)) {
113  ast_log(LOG_WARNING, "Bad write (%d/2): %s\n", res, strerror(errno));
114  return -1;
115  }
116  if ((res = fwrite(f->data.ptr, 1, f->datalen, s->f)) != f->datalen) {
117  ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno));
118  return -1;
119  }
120  return 0;
121 }
#define LOG_WARNING
Definition: logger.h:274
struct ast_frame_subclass subclass
#define ast_log
Definition: astobj2.c:42
union ast_frame::@250 data
#define FRAME_ENDED
Definition: format_h264.c:43
static int len(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t buflen)
int errno

◆ load_module()

static int load_module ( void  )
static

Definition at line 165 of file format_h264.c.

References ast_format_def_register, ast_format_h264, AST_MODULE_LOAD_DECLINE, AST_MODULE_LOAD_SUCCESS, and ast_format_def::format.

Referenced by unload_module().

166 {
171 }
#define ast_format_def_register(f)
Definition: mod_format.h:136
struct ast_format * format
Definition: mod_format.h:48
struct ast_format * ast_format_h264
Built-in cached h264 format.
Definition: format_cache.c:176
Module has failed to load, may be in an inconsistent state.
Definition: module.h:78
static struct ast_format_def h264_f
Definition: format_h264.c:152

◆ unload_module()

static int unload_module ( void  )
static

Definition at line 173 of file format_h264.c.

References ast_format_def_unregister(), AST_MODFLAG_LOAD_ORDER, AST_MODPRI_APP_DEPEND, AST_MODULE_INFO(), AST_MODULE_SUPPORT_CORE, ASTERISK_GPL_KEY, load_module(), and ast_format_def::name.

174 {
176 }
int ast_format_def_unregister(const char *name)
Unregisters a file format.
Definition: file.c:162
char name[80]
Definition: mod_format.h:44
static struct ast_format_def h264_f
Definition: format_h264.c:152

Variable Documentation

◆ __mod_info

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Raw H.264 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 = AST_BUILDOPT_SUM, .support_level = AST_MODULE_SUPPORT_CORE, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND }
static

Definition at line 183 of file format_h264.c.

◆ ast_module_info

const struct ast_module_info* ast_module_info = &__mod_info
static

Definition at line 183 of file format_h264.c.

◆ h264_f

struct ast_format_def h264_f
static

Definition at line 152 of file format_h264.c.