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Win32 support for av_file_map()

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Originally committed as revision 26221 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Daniel Verkamp 2011-01-05 05:16:33 +00:00
parent db61329607
commit 73f6d31e6c
2 changed files with 28 additions and 0 deletions
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2
configure vendored
View File

@ -1040,6 +1040,7 @@ HAVE_LIST="
machine_ioctl_bt848_h
machine_ioctl_meteor_h
malloc_h
MapViewOfFile
memalign
mkstemp
mmap
@ -2687,6 +2688,7 @@ check_func_headers io.h setmode
check_func_headers lzo/lzo1x.h lzo1x_999_compress
check_lib2 "windows.h psapi.h" GetProcessMemoryInfo -lpsapi
check_func_headers windows.h GetProcessTimes
check_func_headers windows.h MapViewOfFile
check_func_headers windows.h VirtualAlloc
check_header conio.h

26
libavutil/file.c
View File

@ -22,6 +22,9 @@
#include <unistd.h>
#if HAVE_MMAP
#include <sys/mman.h>
#elif HAVE_MAPVIEWOFFILE
#include <io.h>
#include <windows.h>
#endif
typedef struct {
@ -81,6 +84,27 @@ 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) {
@ -99,6 +123,8 @@ 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