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

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

Include dependency graph for format_h264.c:

Go to the source code of this file.

Data Structures
struct	h264_desc
Defines
#define	BUF_SIZE 4096 /* Two Real h264 Frames */
Functions
static void	__reg_module (void)
static void	__unreg_module (void)
static int	h264_open (struct ast_filestream *s)
static struct ast_frame *	h264_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, .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_def	h264_f

Detailed Description

Save to raw, headerless h264 data.

File name extension: h264

See Video support in Asterisk

Definition in file format_h264.c.

Define Documentation

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

Todo:: Check this buf size estimate, it may be totally wrong for large frame video

Definition at line 44 of file format_h264.c.

Referenced by h264_read().

Function Documentation

static void __reg_module ( void ) [static]

Definition at line 193 of file format_h264.c.

static void __unreg_module ( void ) [static]

Definition at line 193 of file format_h264.c.

static int h264_open ( struct ast_filestream * s ) [static]

Definition at line 49 of file format_h264.c.

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

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

static struct ast_frame* h264_read	(	struct ast_filestream *	s,
		int *	whennext
	)		`[static, read]`

Definition at line 59 of file format_h264.c.

References ast_filestream::_private, AST_FORMAT_H264, ast_format_set(), ast_format_set_video_mark(), AST_FRAME_SET_BUFFER, AST_FRAME_VIDEO, AST_FRIENDLY_OFFSET, ast_log(), ast_filestream::buf, BUF_SIZE, ast_frame::data, ast_frame::datalen, ast_frame::delivery, errno, ast_filestream::f, ast_frame_subclass::format, ast_filestream::fr, ast_frame::frametype, h264_desc::lastts, len(), LOG_WARNING, ast_frame::mallocd, ast_frame::ptr, ast_frame::samples, ast_frame::subclass, and ast_frame::ts.

{
   int res;
   int mark = 0;
   unsigned short len;
   unsigned int ts;
   struct h264_desc *fs = (struct h264_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);
      len = BUF_SIZE;   /* XXX truncate */
   }
   s->fr.frametype = AST_FRAME_VIDEO;
   ast_format_set(&s->fr.subclass.format, AST_FORMAT_H264, 0);
   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 of %d) (%s)!\n", res, len, strerror(errno));
      return NULL;
   }
   s->fr.samples = fs->lastts;
   s->fr.datalen = len;
   if (mark) {
      ast_format_set_video_mark(&s->fr.subclass.format);
   }
   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 h264_seek	(	struct ast_filestream *	fs,
		off_t	sample_offset,
		int	whence
	)		`[static]`

Definition at line 134 of file format_h264.c.

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

static off_t h264_tell ( struct ast_filestream * fs ) [static]

Definition at line 157 of file format_h264.c.

References ast_filestream::f.

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

static int h264_trunc ( struct ast_filestream * fs ) [static]

Definition at line 140 of file format_h264.c.

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

{
   int fd;
   off_t cur;

   if ((fd = fileno(fs->f)) < 0) {
      ast_log(AST_LOG_WARNING, "Unable to determine file descriptor for h264 filestream %p: %s\n", fs, strerror(errno));
      return -1;
   }
   if ((cur = ftello(fs->f)) < 0) {
      ast_log(AST_LOG_WARNING, "Unable to determine current position in h264 filestream %p: %s\n", fs, strerror(errno));
      return -1;
   }
   /* Truncate file to current length */
   return ftruncate(fd, cur);
}

static int h264_write	(	struct ast_filestream *	s,
		struct ast_frame *	f
	)		`[static]`

Definition at line 101 of file format_h264.c.

References ast_format_get_video_mark(), AST_FORMAT_H264, AST_FRAME_VIDEO, ast_getformatname(), ast_log(), ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, ast_frame_subclass::format, ast_frame::frametype, ast_format::id, len(), LOG_WARNING, ast_frame::ptr, ast_frame::samples, and ast_frame::subclass.

{
   int res;
   unsigned int ts;
   unsigned short len;
   int mark;

   if (f->frametype != AST_FRAME_VIDEO) {
      ast_log(LOG_WARNING, "Asked to write non-video frame!\n");
      return -1;
   }
   mark = ast_format_get_video_mark(&f->subclass.format) ? 0x8000 : 0;
   if (f->subclass.format.id != AST_FORMAT_H264) {
      ast_log(LOG_WARNING, "Asked to write non-h264 frame (%s)!\n", ast_getformatname(&f->subclass.format));
      return -1;
   }
   ts = htonl(f->samples);
   if ((res = fwrite(&ts, 1, sizeof(ts), s->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), s->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, s->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 176 of file format_h264.c.

References ast_format_def_register, AST_FORMAT_H264, ast_format_set(), AST_MODULE_LOAD_FAILURE, AST_MODULE_LOAD_SUCCESS, and ast_format_def::format.

{
   ast_format_set(&h264_f.format, AST_FORMAT_H264, 0);
   if (ast_format_def_register(&h264_f))
      return AST_MODULE_LOAD_FAILURE;
   return AST_MODULE_LOAD_SUCCESS;
}

static int unload_module ( void ) [static]

Definition at line 184 of file format_h264.c.

References ast_format_def_unregister(), and ast_format_def::name.

{
   return ast_format_def_unregister(h264_f.name);
}

Variable Documentation

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

Definition at line 193 of file format_h264.c.

struct ast_module_info* ast_module_info = &__mod_info [static]

Definition at line 193 of file format_h264.c.

struct ast_format_def h264_f [static]

Definition at line 163 of file format_h264.c.

Asterisk developer's documentation

Data Structures

Defines

Functions

Variables

Detailed Description

Define Documentation

Function Documentation

Variable Documentation