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 HRESULT CDECL decoder_wrapper_get_metadata_blocks(struct decoder* iface,
  89     UINT frame, UINT *count, struct decoder_block **blocks)
  90 {
  91     struct decoder_wrapper* This = impl_from_decoder(iface);
  92     return unix_funcs->decoder_get_metadata_blocks(This->unix_decoder, frame, count, blocks);
  93 }
  94
  95 HRESULT CDECL decoder_wrapper_get_color_context(struct decoder* iface,
  96     UINT frame, UINT num, BYTE **data, DWORD *datasize)
  97 {
  98     struct decoder_wrapper* This = impl_from_decoder(iface);
  99     return unix_funcs->decoder_get_color_context(This->unix_decoder, frame, num, data, datasize);
 100 }
 101
 102 void CDECL decoder_wrapper_destroy(struct decoder* iface)
 103 {
 104     struct decoder_wrapper* This = impl_from_decoder(iface);
 105     unix_funcs->decoder_destroy(This->unix_decoder);
 106     HeapFree(GetProcessHeap(), 0, This);
 107 }
 108
 109 static const struct decoder_funcs decoder_wrapper_vtable = {
 110     decoder_wrapper_initialize,
 111     decoder_wrapper_get_frame_info,
 112     decoder_wrapper_copy_pixels,
 113     decoder_wrapper_get_metadata_blocks,
 114     decoder_wrapper_get_color_context,
 115     decoder_wrapper_destroy
 116 };
 117
 118 HRESULT get_unix_decoder(const CLSID *decoder_clsid, struct decoder_info *info, struct decoder **result)
 119 {
 120     HRESULT hr;
 121     struct decoder_wrapper *wrapper;
 122     struct decoder *unix_decoder;
 123
 124     init_unixlib();
 125
 126     hr = unix_funcs->decoder_create(decoder_clsid, info, &unix_decoder);
 127
 128     if (SUCCEEDED(hr))
 129     {
 130         wrapper = HeapAlloc(GetProcessHeap(), 0, sizeof(*wrapper));
 131
 132         if (!wrapper)
 133         {
 134             unix_funcs->decoder_destroy(unix_decoder);
 135             return E_OUTOFMEMORY;
 136         }
 137
 138         wrapper->win32_decoder.vtable = &decoder_wrapper_vtable;
 139         wrapper->unix_decoder = unix_decoder;
 140         *result = &wrapper->win32_decoder;
 141     }
 142
 143     return hr;
 144 }