Prepare for O_DIRECT

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

diff --git a/libavformat/file.c b/libavformat/file.c
index 827541d1ae7b50634e98da762fa9a6113c9b5e9c..c041e562a9ebe0bf5b66a83e48485260aa25671b 100644 (file)
--- a/libavformat/file.c
+++ b/libavformat/file.c
@@ -19,10 +19,11 @@
  * 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>
-#ifdef HAVE_SETMODE
+#if HAVE_SETMODE
 #include <io.h>
 #endif
 #include <unistd.h>
@@ -33,8 +34,13 @@
 
 /* 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;
 
@@ -50,38 +56,53 @@ static int file_open(URLContext *h, const char *filename, int flags)
 #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 AVERROR(ENOENT);
-    h->priv_data = (void *)(size_t)fd;
+    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 int64_t file_seek(URLContext *h, int64_t pos, int whence)
 {
-    int fd = (size_t)h->priv_data;
+    struct FileContext *s = h->priv_data;
+    int fd = s->fd;
     return lseek(fd, pos, whence);
 }
 
 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,
@@ -89,6 +110,7 @@ URLProtocol file_protocol = {
     file_write,
     file_seek,
     file_close,
+    .url_get_file_handle = file_get_handle,
 };
 
 /* pipe protocol */
@@ -107,10 +129,10 @@ static int pipe_open(URLContext *h, const char *filename, int flags)
             fd = 0;
         }
     }
-#ifdef HAVE_SETMODE
+#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;
 }
@@ -120,4 +142,5 @@ URLProtocol pipe_protocol = {
     pipe_open,
     file_read,
     file_write,
+    .url_get_file_handle = file_get_handle,
 };