2 * Copyright 2002 Michael Günnewig
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 #define COM_NO_WINDOWS_H
22 #include "extrachunk.h"
28 #include "wine/debug.h"
30 WINE_DEFAULT_DEBUG_CHANNEL(avifile
);
32 /* reads a chunk outof the extrachunk-structure */
33 HRESULT
ReadExtraChunk(LPEXTRACHUNKS extra
,FOURCC ckid
,LPVOID lpData
,
40 assert(extra
!= NULL
);
48 if (((FOURCC
*)lp
)[0] == ckid
) {
49 /* found correct chunk */
50 if (lpData
!= NULL
&& *size
> 0)
51 memcpy(lpData
, lp
+ 2 * sizeof(DWORD
),
52 min(((LPDWORD
)lp
)[1], *(LPDWORD
)size
));
54 *(LPDWORD
)size
= ((LPDWORD
)lp
)[1];
58 /* skip to next chunk */
59 cb
-= ((LPDWORD
)lp
)[1] + 2 * sizeof(DWORD
);
60 lp
+= ((LPDWORD
)lp
)[1] + 2 * sizeof(DWORD
);
65 /* wanted chunk doesn't exist */
71 /* writes a chunk into the extrachunk-structure */
72 HRESULT
WriteExtraChunk(LPEXTRACHUNKS extra
,FOURCC ckid
,LPVOID lpData
,
78 assert(extra
!= NULL
);
79 assert(lpData
!= NULL
);
83 lp
= HeapReAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY
, extra
->lp
, extra
->cb
+ size
+ 2 * sizeof(DWORD
));
85 lp
= HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY
, size
+ 2 * sizeof(DWORD
));
91 lp
= (LPDWORD
) ((LPBYTE
)lp
+ extra
->cb
);
92 extra
->cb
+= size
+ 2 * sizeof(DWORD
);
94 /* insert chunk-header in block */
98 if (lpData
!= NULL
&& size
> 0)
99 memcpy(lp
+ 2, lpData
, size
);
104 /* reads a chunk fomr the HMMIO into the extrachunk-structure */
105 HRESULT
ReadChunkIntoExtra(LPEXTRACHUNKS extra
,HMMIO hmmio
,MMCKINFO
*lpck
)
111 assert(extra
!= NULL
);
112 assert(hmmio
!= NULL
);
113 assert(lpck
!= NULL
);
115 cb
= lpck
->cksize
+ 2 * sizeof(DWORD
);
118 if (extra
->lp
!= NULL
)
119 lp
= HeapReAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY
, extra
->lp
, extra
->cb
+ cb
);
121 lp
= HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY
, cb
);
124 return AVIERR_MEMORY
;
127 lp
= (LPDWORD
) ((LPBYTE
)lp
+ extra
->cb
);
130 /* insert chunk-header in block */
132 lp
[1] = lpck
->cksize
;
134 if (lpck
->cksize
> 0) {
135 if (mmioSeek(hmmio
, lpck
->dwDataOffset
, SEEK_SET
) == -1)
136 return AVIERR_FILEREAD
;
137 if (mmioRead(hmmio
, (HPSTR
)&lp
[2], lpck
->cksize
) != (LONG
)lpck
->cksize
)
138 return AVIERR_FILEREAD
;
144 /* reads all non-junk chunks into the extrachunk-structure until it finds
145 * the given chunk or the optional parent-chunk is at the end */
146 HRESULT
FindChunkAndKeepExtras(LPEXTRACHUNKS extra
,HMMIO hmmio
,MMCKINFO
*lpck
,
147 MMCKINFO
*lpckParent
,UINT flags
)
154 assert(extra
!= NULL
);
155 assert(hmmio
!= NULL
);
156 assert(lpck
!= NULL
);
158 TRACE("({%p,%lu},%p,%p,%p,0x%X)\n", extra
->lp
, extra
->cb
, hmmio
, lpck
,
161 /* what chunk id and form/list type should we search? */
162 if (flags
& MMIO_FINDCHUNK
) {
165 } else if (flags
& MMIO_FINDLIST
) {
167 fccType
= lpck
->fccType
;
168 } else if (flags
& MMIO_FINDRIFF
) {
170 fccType
= lpck
->fccType
;
172 ckid
= fccType
= (FOURCC
)-1; /* collect everything into extra! */
174 TRACE(": find ckid=0x%08lX fccType=0x%08lX\n", ckid
, fccType
);
177 hr
= mmioDescend(hmmio
, lpck
, lpckParent
, 0);
179 /* No extra chunks in front of desired chunk? */
180 if (flags
== 0 && hr
== MMIOERR_CHUNKNOTFOUND
)
185 /* Have we found what we search for? */
186 if ((lpck
->ckid
== ckid
) &&
187 (fccType
== (FOURCC
)0 || lpck
->fccType
== fccType
))
190 /* Skip padding chunks, the others put into the extrachunk-structure */
191 if (lpck
->ckid
== ckidAVIPADDING
||
192 lpck
->ckid
== mmioFOURCC('p','a','d','d'))
193 hr
= mmioAscend(hmmio
, lpck
, 0);
195 hr
= ReadChunkIntoExtra(extra
, hmmio
, lpck
);