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Diffstat (limited to 'Source/DirectFB/lib/voodoo/packet.h')
| -rwxr-xr-x | Source/DirectFB/lib/voodoo/packet.h | 285 |
1 files changed, 285 insertions, 0 deletions
diff --git a/Source/DirectFB/lib/voodoo/packet.h b/Source/DirectFB/lib/voodoo/packet.h new file mode 100755 index 0000000..3f97071 --- /dev/null +++ b/Source/DirectFB/lib/voodoo/packet.h @@ -0,0 +1,285 @@ +/* + (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 |