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/*****************************************************************************
* buffer.c : DirectMedia Object decoder module for vlc
*****************************************************************************
* Copyright (C) 2002, 2003 VLC authors and VideoLAN
* $Id$
*
* Author: Gildas Bazin <gbazin@videolan.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_codec.h>
#ifndef _WIN32
# define LOADER
#else
# include <objbase.h>
#endif
#ifdef LOADER
# include <wine/winerror.h>
# include <wine/windef.h>
#endif
#include <vlc_codecs.h>
#include "dmo.h"
static long STDCALL QueryInterface( IUnknown *This,
const GUID *riid, void **ppv )
{
CMediaBuffer *p_mb = (CMediaBuffer *)This;
if( !memcmp( riid, &IID_IUnknown, sizeof(GUID) ) ||
!memcmp( riid, &IID_IMediaBuffer, sizeof(GUID) ) )
{
p_mb->i_ref++;
*ppv = (void *)This;
return NOERROR;
}
else
{
*ppv = NULL;
return E_NOINTERFACE;
}
}
static long STDCALL AddRef( IUnknown *This )
{
CMediaBuffer *p_mb = (CMediaBuffer *)This;
return p_mb->i_ref++;
}
static long STDCALL Release( IUnknown *This )
{
CMediaBuffer *p_mb = (CMediaBuffer *)This;
p_mb->i_ref--;
if( p_mb->i_ref == 0 )
{
if( p_mb->b_own ) block_Release( p_mb->p_block );
free( p_mb->vt );
free( p_mb );
}
return 0;
}
static long STDCALL SetLength( IMediaBuffer *This, uint32_t cbLength )
{
CMediaBuffer *p_mb = (CMediaBuffer *)This;
if( cbLength > (uint32_t)p_mb->i_max_size ) return E_INVALIDARG;
p_mb->p_block->i_buffer = cbLength;
return S_OK;
}
static long STDCALL GetMaxLength( IMediaBuffer *This, uint32_t *pcbMaxLength )
{
CMediaBuffer *p_mb = (CMediaBuffer *)This;
if( !pcbMaxLength ) return E_POINTER;
*pcbMaxLength = p_mb->i_max_size;
return S_OK;
}
static long STDCALL GetBufferAndLength( IMediaBuffer *This,
char **ppBuffer, uint32_t *pcbLength )
{
CMediaBuffer *p_mb = (CMediaBuffer *)This;
if( !ppBuffer && !pcbLength ) return E_POINTER;
if( ppBuffer ) *ppBuffer = (char*)p_mb->p_block->p_buffer;
if( pcbLength ) *pcbLength = p_mb->p_block->i_buffer;
return S_OK;
}
CMediaBuffer *CMediaBufferCreate( block_t *p_block, int i_max_size,
bool b_own )
{
CMediaBuffer *p_mb = (CMediaBuffer *)malloc( sizeof(CMediaBuffer) );
if( !p_mb ) return NULL;
p_mb->vt = (IMediaBuffer_vt *)malloc( sizeof(IMediaBuffer_vt) );
if( !p_mb->vt )
{
free( p_mb );
return NULL;
}
p_mb->i_ref = 1;
p_mb->p_block = p_block;
p_mb->i_max_size = i_max_size;
p_mb->b_own = b_own;
p_mb->vt->QueryInterface = QueryInterface;
p_mb->vt->AddRef = AddRef;
p_mb->vt->Release = Release;
p_mb->vt->SetLength = SetLength;
p_mb->vt->GetMaxLength = GetMaxLength;
p_mb->vt->GetBufferAndLength = GetBufferAndLength;
return p_mb;
}
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