1 /*****************************************************************************
2 * buffer.c : DirectMedia Object decoder module for vlc
3 *****************************************************************************
4 * Copyright (C) 2002, 2003 the VideoLAN team
7 * Author: Gildas Bazin <gbazin@videolan.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_codec.h>
43 # include <wine/winerror.h>
44 # include <wine/windef.h>
47 #include <vlc_codecs.h>
50 static long STDCALL QueryInterface( IUnknown *This,
51 const GUID *riid, void **ppv )
53 CMediaBuffer *p_mb = (CMediaBuffer *)This;
54 if( !memcmp( riid, &IID_IUnknown, sizeof(GUID) ) ||
55 !memcmp( riid, &IID_IMediaBuffer, sizeof(GUID) ) )
68 static long STDCALL AddRef( IUnknown *This )
70 CMediaBuffer *p_mb = (CMediaBuffer *)This;
74 static long STDCALL Release( IUnknown *This )
76 CMediaBuffer *p_mb = (CMediaBuffer *)This;
79 if( p_mb->i_ref == 0 )
81 if( p_mb->b_own ) block_Release( p_mb->p_block );
89 static long STDCALL SetLength( IMediaBuffer *This, uint32_t cbLength )
91 CMediaBuffer *p_mb = (CMediaBuffer *)This;
92 if( cbLength > (uint32_t)p_mb->i_max_size ) return E_INVALIDARG;
93 p_mb->p_block->i_buffer = cbLength;
97 static long STDCALL GetMaxLength( IMediaBuffer *This, uint32_t *pcbMaxLength )
99 CMediaBuffer *p_mb = (CMediaBuffer *)This;
100 if( !pcbMaxLength ) return E_POINTER;
101 *pcbMaxLength = p_mb->i_max_size;
105 static long STDCALL GetBufferAndLength( IMediaBuffer *This,
106 char **ppBuffer, uint32_t *pcbLength )
108 CMediaBuffer *p_mb = (CMediaBuffer *)This;
110 if( !ppBuffer && !pcbLength ) return E_POINTER;
111 if( ppBuffer ) *ppBuffer = (char*)p_mb->p_block->p_buffer;
112 if( pcbLength ) *pcbLength = p_mb->p_block->i_buffer;
116 CMediaBuffer *CMediaBufferCreate( block_t *p_block, int i_max_size,
119 CMediaBuffer *p_mb = (CMediaBuffer *)malloc( sizeof(CMediaBuffer) );
120 if( !p_mb ) return NULL;
122 p_mb->vt = (IMediaBuffer_vt *)malloc( sizeof(IMediaBuffer_vt) );
130 p_mb->p_block = p_block;
131 p_mb->i_max_size = i_max_size;
134 p_mb->vt->QueryInterface = QueryInterface;
135 p_mb->vt->AddRef = AddRef;
136 p_mb->vt->Release = Release;
138 p_mb->vt->SetLength = SetLength;
139 p_mb->vt->GetMaxLength = GetMaxLength;
140 p_mb->vt->GetBufferAndLength = GetBufferAndLength;