Merged revisions 74317 via svnmerge from
[asterisk/asterisk.git] / formats / format_ilbc.c
old mode 100755 (executable)
new mode 100644 (file)
index 0d50900..78d1179
 /*
- * Asterisk -- A telephony toolkit for Linux.
- *
- * Save to raw, headerless iLBC data.
+ * Asterisk -- An open source telephony toolkit.
  *
  * Brian K. West <brian@bkw.org>
  * 
- * Copyright (C) 1999, Mark Spencer
+ * Copyright (C) 1999 - 2005, Digium, Inc.
+ *
+ * Mark Spencer <markster@digium.com>
  *
- * Mark Spencer <markster@linux-support.net>
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
  *
  * This program is free software, distributed under the terms of
- * the GNU General Public License
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*! \file
+ *
+ * \brief Save to raw, headerless iLBC data.
+ * \arg File name extension: ilbc
+ * \ingroup formats
  */
  
-#include <asterisk/lock.h>
-#include <asterisk/channel.h>
-#include <asterisk/file.h>
-#include <asterisk/logger.h>
-#include <asterisk/sched.h>
-#include <asterisk/module.h>
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include <unistd.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <stdlib.h>
 #include <sys/time.h>
 #include <stdio.h>
-#include <unistd.h>
 #include <errno.h>
 #include <string.h>
-#include <pthread.h>
-#ifdef __linux__
-#include <endian.h>
-#else
-#include <machine/endian.h>
-#endif
+
+#include "asterisk/lock.h"
+#include "asterisk/channel.h"
+#include "asterisk/file.h"
+#include "asterisk/logger.h"
+#include "asterisk/sched.h"
+#include "asterisk/module.h"
+#include "asterisk/endian.h"
 
 /* Some Ideas for this code came from makeg729e.c by Jeffrey Chilton */
 
 /* Portions of the conversion code are by guido@sienanet.it */
 
-struct ast_filestream {
-       void *reserved[AST_RESERVED_POINTERS];
-       /* Believe it or not, we must decode/recode to account for the
-          weird MS format */
-       /* This is what a filestream means to us */
-       int fd; /* Descriptor */
-       struct ast_frame fr;                            /* Frame information */
-       char waste[AST_FRIENDLY_OFFSET];        /* Buffer for sending frames, etc */
-       char empty;                                                     /* Empty character */
-       unsigned char ilbc[50];                         /* One Real iLBC Frame */
-};
-
-
-AST_MUTEX_DEFINE_STATIC(ilbc_lock);
-static int glistcnt = 0;
-
-static char *name = "iLBC";
-static char *desc = "Raw iLBC data";
-static char *exts = "ilbc";
-
-static struct ast_filestream *ilbc_open(int fd)
-{
-       /* We don't have any header to read or anything really, but
-          if we did, it would go here.  We also might want to check
-          and be sure it's a valid file.  */
-       struct ast_filestream *tmp;
-       if ((tmp = malloc(sizeof(struct ast_filestream)))) {
-               memset(tmp, 0, sizeof(struct ast_filestream));
-               if (ast_mutex_lock(&ilbc_lock)) {
-                       ast_log(LOG_WARNING, "Unable to lock ilbc list\n");
-                       free(tmp);
-                       return NULL;
-               }
-               tmp->fd = fd;
-               tmp->fr.data = tmp->ilbc;
-               tmp->fr.frametype = AST_FRAME_VOICE;
-               tmp->fr.subclass = AST_FORMAT_ILBC;
-               /* datalen will vary for each frame */
-               tmp->fr.src = name;
-               tmp->fr.mallocd = 0;
-               glistcnt++;
-               ast_mutex_unlock(&ilbc_lock);
-               ast_update_use_count();
-       }
-       return tmp;
-}
-
-static struct ast_filestream *ilbc_rewrite(int fd, char *comment)
-{
-       /* We don't have any header to read or anything really, but
-          if we did, it would go here.  We also might want to check
-          and be sure it's a valid file.  */
-       struct ast_filestream *tmp;
-       if ((tmp = malloc(sizeof(struct ast_filestream)))) {
-               memset(tmp, 0, sizeof(struct ast_filestream));
-               if (ast_mutex_lock(&ilbc_lock)) {
-                       ast_log(LOG_WARNING, "Unable to lock ilbc list\n");
-                       free(tmp);
-                       return NULL;
-               }
-               tmp->fd = fd;
-               glistcnt++;
-               ast_mutex_unlock(&ilbc_lock);
-               ast_update_use_count();
-       } else
-               ast_log(LOG_WARNING, "Out of memory\n");
-       return tmp;
-}
-
-static void ilbc_close(struct ast_filestream *s)
-{
-       if (ast_mutex_lock(&ilbc_lock)) {
-               ast_log(LOG_WARNING, "Unable to lock ilbc list\n");
-               return;
-       }
-       glistcnt--;
-       ast_mutex_unlock(&ilbc_lock);
-       ast_update_use_count();
-       close(s->fd);
-       free(s);
-       s = NULL;
-}
+#define        ILBC_BUF_SIZE   50      /* One Real iLBC Frame */
+#define        ILBC_SAMPLES    240
 
 static struct ast_frame *ilbc_read(struct ast_filestream *s, int *whennext)
 {
@@ -127,17 +59,14 @@ static struct ast_frame *ilbc_read(struct ast_filestream *s, int *whennext)
        /* Send a frame from the file to the appropriate channel */
        s->fr.frametype = AST_FRAME_VOICE;
        s->fr.subclass = AST_FORMAT_ILBC;
-       s->fr.offset = AST_FRIENDLY_OFFSET;
-       s->fr.samples = 240;
-       s->fr.datalen = 50;
        s->fr.mallocd = 0;
-       s->fr.data = s->ilbc;
-       if ((res = read(s->fd, s->ilbc, 50)) != 50) {
+       AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, ILBC_BUF_SIZE);
+       if ((res = fread(s->fr.data, 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;
        }
-       *whennext = s->fr.samples;
+       *whennext = s->fr.samples = ILBC_SAMPLES;
        return &s->fr;
 }
 
@@ -156,27 +85,23 @@ static int ilbc_write(struct ast_filestream *fs, struct ast_frame *f)
                ast_log(LOG_WARNING, "Invalid data length, %d, should be multiple of 50\n", f->datalen);
                return -1;
        }
-       if ((res = write(fs->fd, f->data, f->datalen)) != f->datalen) {
+       if ((res = fwrite(f->data, 1, f->datalen, fs->f)) != f->datalen) {
                        ast_log(LOG_WARNING, "Bad write (%d/50): %s\n", res, strerror(errno));
                        return -1;
        }
        return 0;
 }
 
-static char *ilbc_getcomment(struct ast_filestream *s)
-{
-       return NULL;
-}
-
-static int ilbc_seek(struct ast_filestream *fs, long sample_offset, int whence)
+static int ilbc_seek(struct ast_filestream *fs, off_t sample_offset, int whence)
 {
        long bytes;
        off_t min,cur,max,offset=0;
        min = 0;
-       cur = lseek(fs->fd, 0, SEEK_CUR);
-       max = lseek(fs->fd, 0, SEEK_END);
+       cur = ftello(fs->f);
+       fseeko(fs->f, 0, SEEK_END);
+       max = ftello(fs->f);
        
-       bytes = 50 * (sample_offset / 240);
+       bytes = ILBC_BUF_SIZE * (sample_offset / ILBC_SAMPLES);
        if (whence == SEEK_SET)
                offset = bytes;
        else if (whence == SEEK_CUR || whence == SEEK_FORCECUR)
@@ -186,9 +111,9 @@ static int ilbc_seek(struct ast_filestream *fs, long sample_offset, int whence)
        if (whence != SEEK_FORCECUR) {
                offset = (offset > max)?max:offset;
        }
-       // protect against seeking beyond begining.
+       /* protect against seeking beyond begining. */
        offset = (offset < min)?min:offset;
-       if (lseek(fs->fd, offset, SEEK_SET) < 0)
+       if (fseeko(fs->f, offset, SEEK_SET) < 0)
                return -1;
        return 0;
 }
@@ -196,58 +121,37 @@ static int ilbc_seek(struct ast_filestream *fs, long sample_offset, int whence)
 static int ilbc_trunc(struct ast_filestream *fs)
 {
        /* Truncate file to current length */
-       if (ftruncate(fs->fd, lseek(fs->fd, 0, SEEK_CUR)) < 0)
+       if (ftruncate(fileno(fs->f), ftello(fs->f)) < 0)
                return -1;
        return 0;
 }
 
-static long ilbc_tell(struct ast_filestream *fs)
+static off_t ilbc_tell(struct ast_filestream *fs)
 {
-       off_t offset;
-       offset = lseek(fs->fd, 0, SEEK_CUR);
-       return (offset/50)*240;
+       off_t offset = ftello(fs->f);
+       return (offset/ILBC_BUF_SIZE)*ILBC_SAMPLES;
 }
 
-int load_module()
-{
-       return ast_format_register(name, exts, AST_FORMAT_ILBC,
-                                                               ilbc_open,
-                                                               ilbc_rewrite,
-                                                               ilbc_write,
-                                                               ilbc_seek,
-                                                               ilbc_trunc,
-                                                               ilbc_tell,
-                                                               ilbc_read,
-                                                               ilbc_close,
-                                                               ilbc_getcomment);
-                                                               
-                                                               
-}
-
-int unload_module()
-{
-       return ast_format_unregister(name);
-}      
+static const struct ast_format ilbc_f = {
+       .name = "iLBC",
+       .exts = "ilbc",
+       .format = AST_FORMAT_ILBC,
+       .write = ilbc_write,
+       .seek = ilbc_seek,
+       .trunc = ilbc_trunc,
+       .tell = ilbc_tell,
+       .read = ilbc_read,
+       .buf_size = ILBC_BUF_SIZE + AST_FRIENDLY_OFFSET,
+};
 
-int usecount()
+static int load_module(void)
 {
-       int res;
-       if (ast_mutex_lock(&ilbc_lock)) {
-               ast_log(LOG_WARNING, "Unable to lock ilbc list\n");
-               return -1;
-       }
-       res = glistcnt;
-       ast_mutex_unlock(&ilbc_lock);
-       return res;
+       return ast_format_register(&ilbc_f);
 }
 
-char *description()
+static int unload_module(void)
 {
-       return desc;
-}
-
+       return ast_format_unregister(ilbc_f.name);
+}      
 
-char *key()
-{
-       return ASTERISK_GPL_KEY;
-}
+AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Raw iLBC data");