dlls/windowscodecs/unix_iface.c

   1 /*
   2  * unix_iface.c - This is the Win32 side of the Unix interface.
   3  *
   4  * Copyright 2020 Esme Povirk
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include <stdarg.h>
  25
  26 #define NONAMELESSUNION
  27 #define COBJMACROS
  28
  29 #include "windef.h"
  30 #include "winbase.h"
  31 #include "objbase.h"
  32 #include "winternl.h"
  33
  34 #include "wincodecs_private.h"
  35
  36 #include "wine/debug.h"
  37
  38 static INIT_ONCE init_once = INIT_ONCE_STATIC_INIT;
  39
  40 static const struct unix_funcs *unix_funcs;
  41
  42 static const struct win32_funcs win32_funcs = {
  43     stream_read,
  44     stream_seek
  45 };
  46
  47 static BOOL WINAPI load_unixlib( INIT_ONCE *once, void *param, void **context )
  48 {
  49     __wine_init_unix_lib( windowscodecs_module, DLL_PROCESS_ATTACH, &win32_funcs, &unix_funcs );
  50     return TRUE;
  51 }
  52
  53 static void init_unixlib(void)
  54 {
  55     InitOnceExecuteOnce( &init_once, load_unixlib, NULL, NULL );
  56 }
  57
  58 struct decoder_wrapper
  59 {
  60     struct decoder win32_decoder;
  61     struct decoder *unix_decoder;
  62 };
  63
  64 static inline struct decoder_wrapper *impl_from_decoder(struct decoder* iface)
  65 {
  66     return CONTAINING_RECORD(iface, struct decoder_wrapper, win32_decoder);
  67 }
  68
  69 HRESULT CDECL decoder_wrapper_initialize(struct decoder* iface, IStream* stream, struct decoder_stat *st)
  70 {
  71     struct decoder_wrapper* This = impl_from_decoder(iface);
  72     return unix_funcs->decoder_initialize(This->unix_decoder, stream, st);
  73 }
  74
  75 HRESULT CDECL decoder_wrapper_get_frame_info(struct decoder* iface, UINT frame, struct decoder_frame *info)
  76 {
  77     struct decoder_wrapper* This = impl_from_decoder(iface);
  78     return unix_funcs->decoder_get_frame_info(This->unix_decoder, frame, info);
  79 }
  80
  81 HRESULT CDECL decoder_wrapper_copy_pixels(struct decoder* iface, UINT frame,
  82     const WICRect *prc, UINT stride, UINT buffersize, BYTE *buffer)
  83 {
  84     struct decoder_wrapper* This = impl_from_decoder(iface);
  85     return unix_funcs->decoder_copy_pixels(This->unix_decoder, frame, prc, stride, buffersize, buffer);
  86 }
  87
  88 void CDECL decoder_wrapper_destroy(struct decoder* iface)
  89 {
  90     struct decoder_wrapper* This = impl_from_decoder(iface);
  91     unix_funcs->decoder_destroy(This->unix_decoder);
  92     HeapFree(GetProcessHeap(), 0, This);
  93 }
  94
  95 static const struct decoder_funcs decoder_wrapper_vtable = {
  96     decoder_wrapper_initialize,
  97     decoder_wrapper_get_frame_info,
  98     decoder_wrapper_copy_pixels,
  99     decoder_wrapper_destroy
 100 };
 101
 102 HRESULT get_unix_decoder(const CLSID *decoder_clsid, struct decoder_info *info, struct decoder **result)
 103 {
 104     HRESULT hr;
 105     struct decoder_wrapper *wrapper;
 106     struct decoder *unix_decoder;
 107
 108     init_unixlib();
 109
 110     hr = unix_funcs->decoder_create(decoder_clsid, info, &unix_decoder);
 111
 112     if (SUCCEEDED(hr))
 113     {
 114         wrapper = HeapAlloc(GetProcessHeap(), 0, sizeof(*wrapper));
 115
 116         if (!wrapper)
 117         {
 118             unix_funcs->decoder_destroy(unix_decoder);
 119             return E_OUTOFMEMORY;
 120         }
 121
 122         wrapper->win32_decoder.vtable = &decoder_wrapper_vtable;
 123         wrapper->unix_decoder = unix_decoder;
 124         *result = &wrapper->win32_decoder;
 125     }
 126
 127     return hr;
 128 }