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/*
(c) Copyright 2001-2011 The world wide DirectFB Open Source Community (directfb.org)
(c) Copyright 2000-2004 Convergence (integrated media) GmbH
All rights reserved.
Written by Denis Oliver Kropp <dok@directfb.org>,
Andreas Hundt <andi@fischlustig.de>,
Sven Neumann <neo@directfb.org>,
Ville Syrjälä <syrjala@sci.fi> and
Claudio Ciccani <klan@users.sf.net>.
This library 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 of the License, or (at your option) any later version.
This library 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 library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#ifndef __VOODOO__PACKET_H__
#define __VOODOO__PACKET_H__
extern "C" {
#include <direct/fastlz.h>
#include <direct/list.h>
#include <direct/mem.h>
#include <direct/memcpy.h>
#include <voodoo/types.h>
}
typedef enum {
VPHF_NONE = 0x00000000,
VPHF_COMPRESSED = 0x00000001,
VPHF_ALL = 0x00000001
} VoodooPacketHeaderFlags;
typedef struct {
u32 size;
u32 flags;
u32 uncompressed;
u32 align;
} VoodooPacketHeader;
class VoodooPacket {
public:
DirectLink link;
bool sending;
private:
void *data;
void *current;
VoodooPacketHeader header;
VoodooPacket( u32 size,
void *data )
:
sending(false),
data(data),
current(data)
{
memset( &link, 0, sizeof(link) );
header.size = size;
header.flags = VPHF_NONE;
header.uncompressed = size;
}
VoodooPacket( u32 size,
u32 flags,
u32 uncompressed,
void *data )
:
sending(false),
data(data),
current(data)
{
memset( &link, 0, sizeof(link) );
header.size = size;
header.flags = VPHF_COMPRESSED;
header.uncompressed = uncompressed;
}
~VoodooPacket() {};
public:
/*
static VoodooPacket *
New( u32 size )
{
VoodooPacket *packet = (VoodooPacket*) D_MALLOC( sizeof(VoodooPacket) + size );
if (!packet) {
D_OOM();
return NULL;
}
return new (packet) VoodooPacket( size, packet + 1 );
if (data)
this->data = data;
else
this->data = header + 1;
}
*/
static VoodooPacket *
New( u32 size,
void *data )
{
return new VoodooPacket( size, data );
}
static VoodooPacket *
Reset( VoodooPacket *packet,
u32 size,
void *data )
{
return new (packet) VoodooPacket( size, data );
}
static VoodooPacket *
New( void *header,
u32 size )
{
VoodooPacketHeader *h = (VoodooPacketHeader*) header;
h->size = size;
h->flags = VPHF_NONE;
h->uncompressed = size;
return new VoodooPacket( size, (char*) header + sizeof(VoodooPacketHeader) );
}
static VoodooPacket *
New( u32 size )
{
VoodooPacket *p = (VoodooPacket*) D_MALLOC( sizeof(VoodooPacket) + VOODOO_PACKET_MAX );
if (!p) {
D_OOM();
return NULL;
}
return new (p) VoodooPacket( size, p + 1 );
}
static VoodooPacket *
Compressed( VoodooPacket *packet )
{
VoodooPacket *p = (VoodooPacket*) D_MALLOC( sizeof(VoodooPacket) + packet->header.size * 4 / 3 );
if (!p) {
D_OOM();
return NULL;
}
int compressed = direct_fastlz_compress( packet->data, packet->header.uncompressed, p + 1 );
if ((size_t) compressed < packet->header.uncompressed)
return new (p) VoodooPacket( compressed, VPHF_COMPRESSED, packet->header.uncompressed, p + 1 );
D_FREE( p );
return packet;
}
static VoodooPacket *
Copy( VoodooPacket *packet )
{
VoodooPacket *p = (VoodooPacket*) D_MALLOC( sizeof(VoodooPacket) + packet->header.size );
if (!p) {
D_OOM();
return NULL;
}
direct_memcpy( p + 1, packet->data_start(), packet->header.size );
return new (p) VoodooPacket( packet->header.size, packet->header.flags, packet->header.uncompressed, p + 1 );
}
static VoodooPacket *
Copy( u32 size,
u32 flags,
u32 uncompressed,
void *data )
{
VoodooPacket *p = (VoodooPacket*) D_MALLOC( sizeof(VoodooPacket) + size );
if (!p) {
D_OOM();
return NULL;
}
direct_memcpy( p + 1, data, size );
return new (p) VoodooPacket( size, flags, uncompressed, p + 1 );
}
inline u32
size() const
{
return header.size;
}
inline u32
flags() const
{
return header.flags;
}
inline u32
uncompressed() const
{
return header.uncompressed;
}
inline const void *
data_header() const
{
D_ASSERT( data == this + 1 );
return &header;
}
inline const void *
data_start() const
{
return data;
}
inline void *
data_raw() const
{
return current;
}
inline bool
append( size_t size )
{
D_ASSERT( data == this + 1 );
if (header.size + size > VOODOO_PACKET_MAX)
return false;
current = (char*) data + header.size;
header.size += size;
header.uncompressed += size;
return true;
}
inline void
reset( size_t size )
{
D_ASSERT( data == this + 1 );
current = (char*) data;
header.size = size;
header.uncompressed = size;
}
};
#endif
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