Save to raw, headerless h263 data. More...

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

Include dependency graph for format_h263.c:

Go to the source code of this file.

Data Structures
struct	h263_desc
Defines
#define	BUF_SIZE 32768
Functions
static void	__reg_module (void)
static void	__unreg_module (void)
static int	h263_open (struct ast_filestream *s)
static struct ast_frame *	h263_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 = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND }
static struct ast_module_info *	ast_module_info = &__mod_info
static struct ast_format	h263_f

Detailed Description

Save to raw, headerless h263 data.

File name extension: h263

See Video support in Asterisk

Definition in file format_h263.c.

Define Documentation

#define BUF_SIZE 32768

Definition at line 49 of file format_h263.c.

Referenced by h263_read().

Function Documentation

static void __reg_module ( void ) [static]

Definition at line 194 of file format_h263.c.

static void __unreg_module ( void ) [static]

Definition at line 194 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.

{
   unsigned int ts;
   int res;

   if ((res = fread(&ts, 1, sizeof(ts), s->f)) < sizeof(ts)) {
      ast_log(LOG_WARNING, "Empty file!\n");
      return -1;
   }
   return 0;
}

static struct ast_frame* h263_read	(	struct ast_filestream *	s,
		int *	whennext
	)		`[static, read]`

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, h263_desc::lastts, len(), LOG_WARNING, ast_frame::mallocd, ast_frame::ptr, ast_frame::samples, ast_frame::subclass, and ast_frame::ts.

{
   int res;
   format_t mark;
   unsigned short len;
   unsigned int ts;
   struct h263_desc *fs = (struct h263_desc *)s->_private;

   /* Send a frame from the file to the appropriate channel */
   if ((res = fread(&len, 1, sizeof(len), s->f)) < 1)
      return NULL;
   len = ntohs(len);
   mark = (len & 0x8000) ? 1 : 0;
   len &= 0x7fff;
   if (len > BUF_SIZE) {
      ast_log(LOG_WARNING, "Length %d is too long\n", len);
      return NULL;
   }
   s->fr.frametype = AST_FRAME_VIDEO;
   s->fr.subclass.codec = AST_FORMAT_H263;
   s->fr.mallocd = 0;
   AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, len);
   if ((res = fread(s->fr.data.ptr, 1, s->fr.datalen, s->f)) != s->fr.datalen) {
      if (res)
         ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno));
      return NULL;
   }
   s->fr.samples = fs->lastts;   /* XXX what ? */
   s->fr.datalen = len;
   s->fr.subclass.codec |= mark;
   s->fr.delivery.tv_sec = 0;
   s->fr.delivery.tv_usec = 0;
   if ((res = fread(&ts, 1, sizeof(ts), s->f)) == sizeof(ts)) {
      fs->lastts = ntohl(ts);
      *whennext = fs->lastts * 4/45;
   } else
      *whennext = 0;
   return &s->fr;
}

static int h263_seek	(	struct ast_filestream *	fs,
		off_t	sample_offset,
		int	whence
	)		`[static]`

Definition at line 144 of file format_h263.c.

{
   /* No way Jose */
   return -1;
}

static off_t h263_tell ( struct ast_filestream * fs ) [static]

Definition at line 158 of file format_h263.c.

References ast_filestream::f.

{
   off_t offset = ftello(fs->f);
   return offset; /* XXX totally bogus, needs fixing */
}

static int h263_trunc ( struct ast_filestream * fs ) [static]

Definition at line 150 of file format_h263.c.

References ast_filestream::f.

{
   /* Truncate file to current length */
   if (ftruncate(fileno(fs->f), ftello(fs->f)) < 0)
      return -1;
   return 0;
}

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.

{
   int res;
   unsigned int ts;
   unsigned short len;
   format_t subclass;
   format_t mark=0;
   if (f->frametype != AST_FRAME_VIDEO) {
      ast_log(LOG_WARNING, "Asked to write non-video frame!\n");
      return -1;
   }
   subclass = f->subclass.codec;
   if (subclass & 0x1)
      mark=0x8000;
   subclass &= ~0x1;
   if (subclass != AST_FORMAT_H263) {
      ast_log(LOG_WARNING, "Asked to write non-h263 frame (%s)!\n", ast_getformatname(f->subclass.codec));
      return -1;
   }
   ts = htonl(f->samples);
   if ((res = fwrite(&ts, 1, sizeof(ts), fs->f)) != sizeof(ts)) {
         ast_log(LOG_WARNING, "Bad write (%d/4): %s\n", res, strerror(errno));
         return -1;
   }
   len = htons(f->datalen | mark);
   if ((res = fwrite(&len, 1, sizeof(len), fs->f)) != sizeof(len)) {
         ast_log(LOG_WARNING, "Bad write (%d/2): %s\n", res, strerror(errno));
         return -1;
   }
   if ((res = fwrite(f->data.ptr, 1, f->datalen, fs->f)) != f->datalen) {
         ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno));
         return -1;
   }
   return 0;
}

static int load_module ( void ) [static]

Definition at line 178 of file format_h263.c.

References ast_format_register, AST_MODULE_LOAD_FAILURE, and AST_MODULE_LOAD_SUCCESS.

{
   if (ast_format_register(&h263_f))
      return AST_MODULE_LOAD_FAILURE;
   return AST_MODULE_LOAD_SUCCESS;
}

static int unload_module ( void ) [static]

Definition at line 185 of file format_h263.c.

References ast_format_unregister(), and ast_format::name.

{
   return ast_format_unregister(h263_f.name);
}

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 = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND } [static]

Definition at line 194 of file format_h263.c.

struct ast_module_info* ast_module_info = &__mod_info [static]

Definition at line 194 of file format_h263.c.

struct ast_format h263_f [static]

Definition at line 164 of file format_h263.c.

Asterisk developer's documentation

Data Structures

Defines

Functions

Variables

Detailed Description

Define Documentation

Function Documentation

Variable Documentation