nvenc: Add an explicit auto alias

[ffmpeg] / libavutil / file.c

diff --git a/libavutil/file.c b/libavutil/file.c
index 1ccb692f92d597c0af58002e05782eb5b296b435..05ed2479a248dce2772a49eafcd031d5be6ec6c4 100644 (file)
--- a/libavutil/file.c
+++ b/libavutil/file.c
@@ -1,50 +1,64 @@
 /*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
  *
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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 2.1 of the License, or (at your option) any later version.
  *
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include "config.h"
 #include "file.h"
+#include "internal.h"
+#include "log.h"
+#include "mem.h"
 #include <fcntl.h>
 #include <sys/stat.h>
+#if HAVE_UNISTD_H
 #include <unistd.h>
+#endif
+#if HAVE_IO_H
+#include <io.h>
+#endif
 #if HAVE_MMAP
 #include <sys/mman.h>
+#elif HAVE_MAPVIEWOFFILE
+#include <windows.h>
 #endif
 
-typedef struct {
+typedef struct FileLogContext {
     const AVClass *class;
     int   log_offset;
     void *log_ctx;
 } FileLogContext;
 
 static const AVClass file_log_ctx_class = {
-    "FILE", av_default_item_name, NULL, LIBAVUTIL_VERSION_INT,
-    offsetof(FileLogContext, log_offset), offsetof(FileLogContext, log_ctx)
+    .class_name                = "FILE",
+    .item_name                 = av_default_item_name,
+    .option                    = NULL,
+    .version                   = LIBAVUTIL_VERSION_INT,
+    .log_level_offset_offset   = offsetof(FileLogContext, log_offset),
+    .parent_log_context_offset = offsetof(FileLogContext, log_ctx),
 };
 
 int av_file_map(const char *filename, uint8_t **bufptr, size_t *size,
                 int log_offset, void *log_ctx)
 {
     FileLogContext file_log_ctx = { &file_log_ctx_class, log_offset, log_ctx };
-    int err, fd = open(filename, O_RDONLY);
+    int err, fd = avpriv_open(filename, O_RDONLY);
     struct stat st;
     av_unused void *ptr;
     off_t off_size;
     char errbuf[128];
-    size_t max_size = HAVE_MMAP ? SIZE_MAX : FF_INTERNAL_MEM_TYPE_MAX_VALUE;
     *bufptr = NULL;
 
     if (fd < 0) {
@@ -63,7 +77,7 @@ int av_file_map(const char *filename, uint8_t **bufptr, size_t *size,
     }
 
     off_size = st.st_size;
-    if (off_size > max_size) {
+    if (off_size > SIZE_MAX) {
         av_log(&file_log_ctx, AV_LOG_ERROR,
                "File size for file '%s' is too big\n", filename);
         close(fd);
@@ -73,7 +87,7 @@ int av_file_map(const char *filename, uint8_t **bufptr, size_t *size,
 
 #if HAVE_MMAP
     ptr = mmap(NULL, *size, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
-    if ((int)(ptr) == -1) {
+    if (ptr == MAP_FAILED) {
         err = AVERROR(errno);
         av_strerror(err, errbuf, sizeof(errbuf));
         av_log(&file_log_ctx, AV_LOG_ERROR, "Error occurred in mmap(): %s\n", errbuf);
@@ -81,6 +95,27 @@ int av_file_map(const char *filename, uint8_t **bufptr, size_t *size,
         return err;
     }
     *bufptr = ptr;
+#elif HAVE_MAPVIEWOFFILE
+    {
+        HANDLE mh, fh = (HANDLE)_get_osfhandle(fd);
+
+        mh = CreateFileMapping(fh, NULL, PAGE_READONLY, 0, 0, NULL);
+        if (!mh) {
+            av_log(&file_log_ctx, AV_LOG_ERROR, "Error occurred in CreateFileMapping()\n");
+            close(fd);
+            return -1;
+        }
+
+        ptr = MapViewOfFile(mh, FILE_MAP_READ, 0, 0, *size);
+        CloseHandle(mh);
+        if (!ptr) {
+            av_log(&file_log_ctx, AV_LOG_ERROR, "Error occurred in MapViewOfFile()\n");
+            close(fd);
+            return -1;
+        }
+
+        *bufptr = ptr;
+    }
 #else
     *bufptr = av_malloc(*size);
     if (!*bufptr) {
@@ -99,25 +134,9 @@ void av_file_unmap(uint8_t *bufptr, size_t size)
 {
 #if HAVE_MMAP
     munmap(bufptr, size);
+#elif HAVE_MAPVIEWOFFILE
+    UnmapViewOfFile(bufptr);
 #else
     av_free(bufptr);
 #endif
 }
-
-#ifdef TEST
-
-#undef printf
-
-int main(void)
-{
-    uint8_t *buf;
-    size_t size;
-    if (av_file_map("file.c", &buf, &size, 0, NULL) < 0)
-        return 1;
-
-    buf[0] = 's';
-    printf("%s", buf);
-    av_file_unmap(buf, size);
-    return 0;
-}
-#endif