merge new_loader_completion branch, including (at least):
[asterisk/asterisk.git] / formats / format_sln.c
old mode 100755 (executable)
new mode 100644 (file)
index 911163d..c8c5cc0
@@ -1,27 +1,40 @@
 /*
- * Asterisk -- A telephony toolkit for Linux.
+ * Asterisk -- An open source telephony toolkit.
  *
- * RAW SLINEAR Format
+ * Copyright (C) 1999 - 2005, Anthony Minessale
  * Anthony Minessale (anthmct@yahoo.com)
- * Derived from format_pcm.c in the asterisk distro
+ *
+ * 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 RAW SLINEAR Format
+ * \arg File name extensions: sln, raw
+ * \ingroup formats
  */
  
+#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 "asterisk.h"
-
-ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
-
 #include "asterisk/lock.h"
 #include "asterisk/channel.h"
 #include "asterisk/file.h"
@@ -30,111 +43,25 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 #include "asterisk/module.h"
 #include "asterisk/endian.h"
 
-#define BUF_SIZE 320           /* 320 samples */
-
-struct ast_filestream {
-       void *reserved[AST_RESERVED_POINTERS];
-       /* This is what a filestream means to us */
-       int fd; /* Descriptor */
-       struct ast_channel *owner;
-       struct ast_frame fr;                            /* Frame information */
-       char waste[AST_FRIENDLY_OFFSET];        /* Buffer for sending frames, etc */
-       char empty;                                                     /* Empty character */
-       unsigned char buf[BUF_SIZE];                            /* Output Buffer */
-       struct timeval last;
-};
-
-
-AST_MUTEX_DEFINE_STATIC(slinear_lock);
-static int glistcnt = 0;
-
-static char *name = "sln";
-static char *desc = "Raw Signed Linear Audio support (SLN)";
-static char *exts = "sln|raw";
-
-static struct ast_filestream *slinear_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(&slinear_lock)) {
-                       ast_log(LOG_WARNING, "Unable to lock slinear list\n");
-                       free(tmp);
-                       return NULL;
-               }
-               tmp->fd = fd;
-               tmp->fr.data = tmp->buf;
-               tmp->fr.frametype = AST_FRAME_VOICE;
-               tmp->fr.subclass = AST_FORMAT_SLINEAR;
-               /* datalen will vary for each frame */
-               tmp->fr.src = name;
-               tmp->fr.mallocd = 0;
-               glistcnt++;
-               ast_mutex_unlock(&slinear_lock);
-               ast_update_use_count();
-       }
-       return tmp;
-}
-
-static struct ast_filestream *slinear_rewrite(int fd, const 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(&slinear_lock)) {
-                       ast_log(LOG_WARNING, "Unable to lock slinear list\n");
-                       free(tmp);
-                       return NULL;
-               }
-               tmp->fd = fd;
-               glistcnt++;
-               ast_mutex_unlock(&slinear_lock);
-               ast_update_use_count();
-       } else
-               ast_log(LOG_WARNING, "Out of memory\n");
-       return tmp;
-}
-
-static void slinear_close(struct ast_filestream *s)
-{
-       if (ast_mutex_lock(&slinear_lock)) {
-               ast_log(LOG_WARNING, "Unable to lock slinear list\n");
-               return;
-       }
-       glistcnt--;
-       ast_mutex_unlock(&slinear_lock);
-       ast_update_use_count();
-       close(s->fd);
-       free(s);
-       s = NULL;
-}
+#define BUF_SIZE       320             /* 320 bytes, 160 samples */
+#define        SLIN_SAMPLES    160
 
 static struct ast_frame *slinear_read(struct ast_filestream *s, int *whennext)
 {
        int res;
-       int delay;
        /* Send a frame from the file to the appropriate channel */
 
        s->fr.frametype = AST_FRAME_VOICE;
        s->fr.subclass = AST_FORMAT_SLINEAR;
-       s->fr.offset = AST_FRIENDLY_OFFSET;
        s->fr.mallocd = 0;
-       s->fr.data = s->buf;
-       if ((res = read(s->fd, s->buf, BUF_SIZE)) < 1) {
+       AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, BUF_SIZE);
+       if ((res = fread(s->fr.data, 1, s->fr.datalen, s->f)) < 1) {
                if (res)
                        ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno));
                return NULL;
        }
-       s->fr.samples = res/2;
+       *whennext = s->fr.samples = res/2;
        s->fr.datalen = res;
-       delay = s->fr.samples;
-       *whennext = delay;
        return &s->fr;
 }
 
@@ -149,21 +76,22 @@ static int slinear_write(struct ast_filestream *fs, struct ast_frame *f)
                ast_log(LOG_WARNING, "Asked to write non-slinear frame (%d)!\n", f->subclass);
                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/%d): %s\n", res, f->datalen, strerror(errno));
                        return -1;
        }
        return 0;
 }
 
-static int slinear_seek(struct ast_filestream *fs, long sample_offset, int whence)
+static int slinear_seek(struct ast_filestream *fs, off_t sample_offset, int whence)
 {
        off_t offset=0,min,cur,max;
 
        min = 0;
        sample_offset <<= 1;
-       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);
        if (whence == SEEK_SET)
                offset = sample_offset;
        else if (whence == SEEK_CUR || whence == SEEK_FORCECUR)
@@ -175,66 +103,39 @@ static int slinear_seek(struct ast_filestream *fs, long sample_offset, int whenc
        }
        /* always protect against seeking past begining. */
        offset = (offset < min)?min:offset;
-       return lseek(fs->fd, offset, SEEK_SET);
+       return fseeko(fs->f, offset, SEEK_SET);
 }
 
 static int slinear_trunc(struct ast_filestream *fs)
 {
-       return ftruncate(fs->fd, lseek(fs->fd,0,SEEK_CUR));
+       return ftruncate(fileno(fs->f), ftello(fs->f));
 }
 
-static long slinear_tell(struct ast_filestream *fs)
+static off_t slinear_tell(struct ast_filestream *fs)
 {
-       off_t offset;
-       offset = lseek(fs->fd, 0, SEEK_CUR);
-       return offset;
+       return ftello(fs->f) / 2;
 }
 
-static char *slinear_getcomment(struct ast_filestream *s)
-{
-       return NULL;
-}
+static const struct ast_format slin_f = {
+       .name = "sln",
+       .exts = "sln|raw",
+       .format = AST_FORMAT_SLINEAR,
+       .write = slinear_write,
+       .seek = slinear_seek,
+       .trunc = slinear_trunc,
+       .tell = slinear_tell,
+       .read = slinear_read,
+       .buf_size = BUF_SIZE + AST_FRIENDLY_OFFSET,
+};
 
-int load_module()
+static int load_module(void)
 {
-       return ast_format_register(name, exts, AST_FORMAT_SLINEAR,
-                                                               slinear_open,
-                                                               slinear_rewrite,
-                                                               slinear_write,
-                                                               slinear_seek,
-                                                               slinear_trunc,
-                                                               slinear_tell,
-                                                               slinear_read,
-                                                               slinear_close,
-                                                               slinear_getcomment);
-                                                               
-                                                               
+       return ast_format_register(&slin_f);
 }
 
-int unload_module()
+static int unload_module(void)
 {
-       return ast_format_unregister(name);
+       return ast_format_unregister(slin_f.name);
 }      
 
-int usecount()
-{
-       int res;
-       if (ast_mutex_lock(&slinear_lock)) {
-               ast_log(LOG_WARNING, "Unable to lock slinear list\n");
-               return -1;
-       }
-       res = glistcnt;
-       ast_mutex_unlock(&slinear_lock);
-       return res;
-}
-
-char *description()
-{
-       return desc;
-}
-
-
-char *key()
-{
-       return ASTERISK_GPL_KEY;
-}
+AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Raw Signed Linear Audio support (SLN)");