update compat layer, mainly for MSVC14 issue

src/compat.h

@@ -20,9 +20,18 @@
 
 int64_t aacenc_timer(void);
 FILE *aacenc_fopen(const char *name, const char *mode);
+#ifdef _WIN32
 void aacenc_getmainargs(int *argc, char ***argv);
+#else
+#define aacenc_getmainargs(argc, argv) (void)0
+#endif
 char *aacenc_to_utf8(const char *s);
+#ifdef _WIN32
 int aacenc_fprintf(FILE *fp, const char *fmt, ...);
+#else
+#define aacenc_fprintf fprintf
+#endif
 const char *aacenc_basename(const char *path);
+int aacenc_seekable(FILE *fp);
 
 #endif

src/compat_posix.c

@@ -32,20 +32,9 @@ FILE *aacenc_fopen(const char *name, const char *mode)
     return fp;
 }
 
-void aacenc_getmainargs(int *argc, char ***argv)
+int aacenc_seekable(FILE *fp)
 {
-    return;
-}
-
-int aacenc_fprintf(FILE *fp, const char *fmt, ...)
-{
-    va_list ap;
-    int cnt;
-
-    va_start(ap, fmt);
-    cnt = vfprintf(fp, fmt, ap);
-    va_end(ap);
-    return cnt;
+    return fseek(fp, 0, SEEK_CUR) == 0;
 }
 
 /*

src/compat_win32.c

@@ -20,14 +20,7 @@
 #include "compat.h"
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
-
-typedef struct
-{
-    int newmode;
-} _startupinfo;
-
-extern
-int __wgetmainargs(int *, wchar_t ***, wchar_t ***, int, _startupinfo *);
+#include <shellapi.h>
 
 int64_t aacenc_timer(void)
 {
@@ -41,6 +34,11 @@ int64_t aacenc_timer(void)
     return (int64_t)tv.time * 1000 + tv.millitm;
 }
 
+int aacenc_seekable(FILE *fp)
+{
+    return GetFileType((HANDLE)_get_osfhandle(_fileno(fp))) == FILE_TYPE_DISK;
+}
+
 static
 int codepage_decode_wchar(int codepage, const char *from, wchar_t **to)
 {
@@ -97,19 +95,14 @@ void aacenc_free_mainargs(void)
 
 void aacenc_getmainargs(int *argc, char ***argv)
 {
-    static int (*fp__wgetmainargs)(int *, wchar_t ***, wchar_t ***,
-                                   int, _startupinfo *);
-    int i;
-    wchar_t **wargv, **envp;
-    _startupinfo si = { 0 };
-    HMODULE h = LoadLibraryA("msvcrt.dll");
-    fp__wgetmainargs = (void *)GetProcAddress(h, "__wgetmainargs");
-    (*fp__wgetmainargs)(argc, &wargv, &envp, 1, &si);
-    FreeLibrary(h);
+	int i;
+	wchar_t **wargv;
 
-    *argv = malloc((*argc + 1) * sizeof(char*));
+	wargv = CommandLineToArgvW(GetCommandLineW(), argc);
+	*argv = malloc((*argc + 1) * sizeof(char*));
     for (i = 0; i < *argc; ++i)
         codepage_encode_wchar(CP_UTF8, wargv[i], &(*argv)[i]);
+	LocalFree(wargv);
     (*argv)[*argc] = 0;
     __aacenc_argv__ = *argv;
     atexit(aacenc_free_mainargs);

src/main.c

@@ -702,7 +702,6 @@ pcm_reader_t *open_input(aacenc_param_ex_t *params)
 {
     pcm_io_context_t io = { 0 };
     pcm_reader_t *reader = 0;
-    struct stat stb = { 0 };
 
     if ((params->input_fp = aacenc_fopen(params->input_filename, "rb")) == 0) {
         aacenc_fprintf(stderr, "ERROR: %s: %s\n", params->input_filename,
@@ -710,8 +709,7 @@ pcm_reader_t *open_input(aacenc_param_ex_t *params)
         goto FAIL;
     }
     io.cookie = params->input_fp;
-    if (fstat(fileno(params->input_fp), &stb) == 0
-            && (stb.st_mode & S_IFMT) == S_IFREG)
+    if (aacenc_seekable(params->input_fp))
         io.vtbl = &pcm_io_vtbl;
     else
         io.vtbl = &pcm_io_vtbl_noseek;