Prepare for O_DIRECT

[frescor/ffmpeg.git] / libavformat / file.c

diff --git a/libavformat/file.c b/libavformat/file.c
index fc75ee015cef4ce6d5621a555b4908623820f0a3..c041e562a9ebe0bf5b66a83e48485260aa25671b 100644 (file)
--- a/libavformat/file.c
+++ b/libavformat/file.c
@@ -2,40 +2,49 @@
  * Buffered file io for ffmpeg system
  * Copyright (c) 2001 Fabrice Bellard
  *
- * This library is free software; you can redistribute it and/or
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
  *
- * This library is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
+
+#define _GNU_SOURCE
+#include "libavutil/avstring.h"
 #include "avformat.h"
 #include <fcntl.h>
-#ifndef CONFIG_WIN32
+#if HAVE_SETMODE
+#include <io.h>
+#endif
 #include <unistd.h>
-#include <sys/ioctl.h>
 #include <sys/time.h>
-#else
-#include <io.h>
-#define open(fname,oflag,pmode) _open(fname,oflag,pmode)
-#endif /* CONFIG_WIN32 */
+#include <stdlib.h>
+#include "os_support.h"
 
 
 /* standard file protocol */
 
+struct FileContext {
+    int fd;
+};
+
 static int file_open(URLContext *h, const char *filename, int flags)
 {
+    struct FileContext *s = h->priv_data;
     int access;
     int fd;
 
-    strstart(filename, "file:", &filename);
+    av_strstart(filename, "file:", &filename);
 
     if (flags & URL_RDWR) {
         access = O_CREAT | O_TRUNC | O_RDWR;
@@ -44,45 +53,56 @@ static int file_open(URLContext *h, const char *filename, int flags)
     } else {
         access = O_RDONLY;
     }
-#if defined(CONFIG_WIN32) || defined(CONFIG_OS2) || defined(__CYGWIN__)
+#ifdef O_BINARY
     access |= O_BINARY;
 #endif
+    s = av_malloc(sizeof(struct FileContext));
+    if (!s)
+       return AVERROR(ENOMEM);
+    if (flags & URL_DIRECT)
+       access |= O_DIRECT;
     fd = open(filename, access, 0666);
     if (fd < 0)
-        return -ENOENT;
-    h->priv_data = (void *)(size_t)fd;
+        return AVERROR(ENOENT);
+    s->fd = fd;
+    h->priv_data = (void *) s;
     return 0;
 }
 
 static int file_read(URLContext *h, unsigned char *buf, int size)
 {
-    int fd = (size_t)h->priv_data;
+    struct FileContext *s = h->priv_data;
+    int fd = s->fd;
     return read(fd, buf, size);
 }
 
 static int file_write(URLContext *h, unsigned char *buf, int size)
 {
-    int fd = (size_t)h->priv_data;
+    struct FileContext *s = h->priv_data;
+    int fd = s->fd;
     return write(fd, buf, size);
 }
 
 /* XXX: use llseek */
-static offset_t file_seek(URLContext *h, offset_t pos, int whence)
+static int64_t file_seek(URLContext *h, int64_t pos, int whence)
 {
-    int fd = (size_t)h->priv_data;
-#if defined(CONFIG_WIN32) && !defined(__CYGWIN__) 
-    return _lseeki64(fd, pos, whence);
-#else
+    struct FileContext *s = h->priv_data;
+    int fd = s->fd;
     return lseek(fd, pos, whence);
-#endif
 }
 
 static int file_close(URLContext *h)
 {
-    int fd = (size_t)h->priv_data;
+    struct FileContext *s = h->priv_data;
+    int fd = s->fd;
     return close(fd);
 }
 
+static int file_get_handle(URLContext *h)
+{
+    return (intptr_t) h->priv_data;
+}
+
 URLProtocol file_protocol = {
     "file",
     file_open,
@@ -90,6 +110,7 @@ URLProtocol file_protocol = {
     file_write,
     file_seek,
     file_close,
+    .url_get_file_handle = file_get_handle,
 };
 
 /* pipe protocol */
@@ -97,42 +118,29 @@ URLProtocol file_protocol = {
 static int pipe_open(URLContext *h, const char *filename, int flags)
 {
     int fd;
-
-    if (flags & URL_WRONLY) {
-        fd = 1;
-    } else {
-        fd = 0;
+    char *final;
+    av_strstart(filename, "pipe:", &filename);
+
+    fd = strtol(filename, &final, 10);
+    if((filename == final) || *final ) {/* No digits found, or something like 10ab */
+        if (flags & URL_WRONLY) {
+            fd = 1;
+        } else {
+            fd = 0;
+        }
     }
-#if defined(CONFIG_WIN32) || defined(CONFIG_OS2) || defined(__CYGWIN__)
+#if HAVE_SETMODE
     setmode(fd, O_BINARY);
 #endif
-    h->priv_data = (void *)(size_t)fd;
+    h->priv_data = (void *) (intptr_t) fd;
     h->is_streamed = 1;
     return 0;
 }
 
-static int pipe_read(URLContext *h, unsigned char *buf, int size)
-{
-    int fd = (size_t)h->priv_data;
-    return read(fd, buf, size);
-}
-
-static int pipe_write(URLContext *h, unsigned char *buf, int size)
-{
-    int fd = (size_t)h->priv_data;
-    return write(fd, buf, size);
-}
-
-static int pipe_close(URLContext *h)
-{
-    return 0;
-}
-
 URLProtocol pipe_protocol = {
     "pipe",
     pipe_open,
-    pipe_read,
-    pipe_write,
-    NULL,
-    pipe_close,
+    file_read,
+    file_write,
+    .url_get_file_handle = file_get_handle,
 };