format_jpeg.c File Reference

JPEG File format support. More...

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

Include dependency graph for format_jpeg.c:

Go to the source code of this file.

Functions

static void __reg_module (void)
static void __unreg_module (void)
static int jpeg_identify (int fd)
static struct ast_framejpeg_read_image (int fd, int len)
static int jpeg_write_image (int fd, struct ast_frame *fr)
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 = "jpeg (joint picture experts group) image format" , .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_EXTENDED, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND }
static struct ast_module_infoast_module_info = &__mod_info
static struct ast_imager jpeg_format


Detailed Description

JPEG File format support.

Definition in file format_jpeg.c.


Function Documentation

static void __reg_module ( void   )  [static]

Definition at line 117 of file format_jpeg.c.

static void __unreg_module ( void   )  [static]

Definition at line 117 of file format_jpeg.c.

static int jpeg_identify ( int  fd  )  [static]

Definition at line 63 of file format_jpeg.c.

References buf.

00064 {
00065    char buf[10];
00066    int res;
00067    res = read(fd, buf, sizeof(buf));
00068    if (res < sizeof(buf))
00069       return 0;
00070    if (memcmp(buf + 6, "JFIF", 4))
00071       return 0;
00072    return 1;
00073 }

static struct ast_frame* jpeg_read_image ( int  fd,
int  len 
) [static, read]

Definition at line 41 of file format_jpeg.c.

References ast_format_jpeg, AST_FRAME_IMAGE, ast_frisolate(), ast_log, buf, ast_frame::data, ast_frame::datalen, errno, ast_frame_subclass::format, ast_frame::frametype, LOG_WARNING, NULL, ast_frame::ptr, ast_frame::src, and ast_frame::subclass.

00042 {
00043    struct ast_frame fr;
00044    int res;
00045    char buf[65536];
00046    if (len > sizeof(buf) || len < 0) {
00047       ast_log(LOG_WARNING, "JPEG image too large to read\n");
00048       return NULL;
00049    }
00050    res = read(fd, buf, len);
00051    if (res < len) {
00052       ast_log(LOG_WARNING, "Only read %d of %d bytes: %s\n", res, len, strerror(errno));
00053    }
00054    memset(&fr, 0, sizeof(fr));
00055    fr.frametype = AST_FRAME_IMAGE;
00056    fr.subclass.format = ast_format_jpeg;
00057    fr.data.ptr = buf;
00058    fr.src = "JPEG Read";
00059    fr.datalen = len;
00060    return ast_frisolate(&fr);
00061 }

static int jpeg_write_image ( int  fd,
struct ast_frame fr 
) [static]

Definition at line 75 of file format_jpeg.c.

References ast_log, ast_frame::data, ast_frame::datalen, errno, LOG_WARNING, and ast_frame::ptr.

00076 {
00077    int res=0;
00078    if (fr->datalen) {
00079       res = write(fd, fr->data.ptr, fr->datalen);
00080       if (res != fr->datalen) {
00081          ast_log(LOG_WARNING, "Only wrote %d of %d bytes: %s\n", res, fr->datalen, strerror(errno));
00082          return -1;
00083       }
00084    }
00085    return res;
00086 }

static int load_module ( void   )  [static]

static int unload_module ( void   )  [static]

Definition at line 105 of file format_jpeg.c.

References ast_image_unregister().

00106 {
00107    ast_image_unregister(&jpeg_format);
00108 
00109    return 0;
00110 }


Variable Documentation

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "jpeg (joint picture experts group) image format" , .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_EXTENDED, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND } [static]

Definition at line 117 of file format_jpeg.c.

Definition at line 117 of file format_jpeg.c.

struct ast_imager jpeg_format [static]

Definition at line 88 of file format_jpeg.c.


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