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/*
* Copyright (C) 2010-2011 Mamadou Diop.
*
* Contact: Mamadou Diop <diopmamadou(at)doubango[dot]org>
*
* This file is part of Open Source Doubango Framework.
*
* DOUBANGO is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* DOUBANGO 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with DOUBANGO.
*
*/
/**@file tcomp_compressor.h
* @brief SiComp Deflate compressor (zlib).
*
* @author Mamadou Diop <diopmamadou(at)yahoo.fr>
*
*/
#include "tcomp_deflatedata.h"
#include "tsk_debug.h"
tsk_bool_t tcomp_deflateStream_end(tcomp_deflateStream_t *stream)
{
if(!stream){
TSK_DEBUG_ERROR("NULL defalte stream.");
return tsk_false;
}
return deflateEnd(&(stream->zs));
}
tsk_bool_t tcomp_deflateStream_copy(tcomp_deflateStream_t *stream, tcomp_deflateStream_t *source)
{
if(!stream){
TSK_DEBUG_ERROR("NULL defalte stream.");
return tsk_false;
}
return deflateCopy(&(stream->zs), &(source->zs));
}
tsk_bool_t tcomp_deflatedata_zInit(tcomp_deflatedata_t *deflatedata)
{
if(!deflatedata){
TSK_DEBUG_ERROR("NULL defalte data.");
return tsk_false;
}
/* Already initialized? */
if(deflatedata->isInitialized) {
return tsk_true;
}
/* allocate deflate state */
deflatedata->stream_1.zs.zalloc = deflatedata->stream_acked.zs.zalloc = Z_NULL;
deflatedata->stream_1.zs.zfree = deflatedata->stream_acked.zs.zfree = Z_NULL;
deflatedata->stream_1.zs.opaque = deflatedata->stream_acked.zs.opaque = Z_NULL;
#ifndef __SYMBIAN32__
deflatedata->stream_1.zs.data_type = deflatedata->stream_acked.zs.data_type = Z_TEXT;
#endif
//bool ret = (deflateInit(&this->zStream, this->zLevel) == Z_OK);
if( deflateInit2(&deflatedata->stream_1.zs, deflatedata->zLevel, Z_DEFLATED, -deflatedata->zWindowBits, MAX_MEM_LEVEL, Z_DEFAULT_STRATEGY) != Z_OK
|| deflateInit2(&deflatedata->stream_acked.zs, deflatedata->zLevel, Z_DEFLATED, -deflatedata->zWindowBits, MAX_MEM_LEVEL, Z_DEFAULT_STRATEGY) != Z_OK )
{
return tsk_false;
}
#if USE_DICTS_FOR_COMPRESSION
if( deflateSetDictionary(this->stream_1.zs, (const Bytef*)RFC3485_DICTIONARY_SIP_VALUE, RFC3485_DICTIONARY_SIP_VALUE_LENGTH) != Z_OK
|| deflateSetDictionary(this->stream_acked.zs, (const Bytef*)RFC3485_DICTIONARY_SIP_VALUE, RFC3485_DICTIONARY_SIP_VALUE_LENGTH) != Z_OK )
{
return false;
}
#endif
deflatedata->stream_1.stateful = deflatedata->stream_acked.stateful = 0;
deflatedata->stream_1.dataWaitingAck = deflatedata->stream_acked.dataWaitingAck = 0;
deflatedata->isInitialized = tsk_true;
return tsk_true;
}
tsk_bool_t tcomp_deflatedata_zUnInit(tcomp_deflatedata_t *deflatedata)
{
if(!deflatedata){
TSK_DEBUG_ERROR("NULL defalte data.");
return tsk_false;
}
if(deflatedata->isInitialized){
deflatedata->isInitialized = tsk_false;
deflatedata->stream_1.dataWaitingAck = deflatedata->stream_acked.dataWaitingAck = 0;
deflatedata->stream_1.stateful = deflatedata->stream_acked.stateful = 0;
return (tcomp_deflateStream_end(&deflatedata->stream_1) != Z_STREAM_ERROR) && (tcomp_deflateStream_end(&deflatedata->stream_acked) != Z_STREAM_ERROR);
}
return tsk_true;
}
tsk_bool_t tcomp_deflatedata_zReset(tcomp_deflatedata_t *deflatedata)
{
tsk_bool_t ret;
if(!deflatedata){
TSK_DEBUG_ERROR("NULL defalte data.");
return tsk_false;
}
ret = deflatedata->isInitialized ? tcomp_deflatedata_zUnInit(deflatedata) : tsk_true;
ret &= tcomp_deflatedata_zInit(deflatedata);
return ret;
}
tsk_bool_t tcomp_deflatedata_zCompress(tcomp_deflatedata_t *deflatedata, const void* in, tsk_size_t inLen, void* out, tsk_size_t* outLen, tsk_bool_t *stateChanged)
{
int ret = tsk_false;
/*
Two streams [1] and [2]
* ZINIT/ZUNINIT/ZRESET
XXX([1])
XXX([2])
* COMPRESSION
[1]->END()
[1]<-COPY-[2]
[1]->COMPRESS()
* ACK
[2]->END()
[2]<-COPY-[1]
updateGhost([1])
*/
if(!deflatedata){
TSK_DEBUG_ERROR("Invalid parameter");
return tsk_false;
}
tsk_safeobj_lock(deflatedata);
/* Initialized? */
if(!deflatedata->isInitialized){
if(!tcomp_deflatedata_zInit(deflatedata)){
TSK_DEBUG_ERROR("Failed to initialize zlib resources..");
tsk_safeobj_unlock(deflatedata);
return tsk_false;
}
}
if(deflatedata->useOnlyACKedStates){
if(!deflatedata->stream_acked.dataWaitingAck){
deflatedata->stream_acked.dataWaitingAck = 1;
*stateChanged = tsk_true;
}
else{
*stateChanged = tsk_false;
}
/* END() + COPY() ==> use acked state */
tcomp_deflateStream_end(&(deflatedata->stream_1));
tcomp_deflateStream_copy(&(deflatedata->stream_1), &(deflatedata->stream_acked));
}
else{
*stateChanged = tsk_true;
}
// IN
deflatedata->stream_1.zs.next_in = (Bytef*)in;
deflatedata->stream_1.zs.avail_in = (uInt)inLen;
// OUT
deflatedata->stream_1.zs.next_out = (Bytef*)out;
deflatedata->stream_1.zs.avail_out = (uInt)*outLen;
ret = deflate(&(deflatedata->stream_1.zs), Z_SYNC_FLUSH);
*outLen -= deflatedata->stream_1.zs.avail_out;
tsk_safeobj_unlock(deflatedata);
return (ret == Z_OK);
}
int tcomp_deflatedata_zGetWindowBits(tcomp_deflatedata_t *deflatedata)
{
if(!deflatedata){
TSK_DEBUG_ERROR("Invalid parameter");
return 0;
}
return deflatedata->zWindowBits;
}
void tcomp_deflatedata_zSetWindowBits(tcomp_deflatedata_t *deflatedata, int windowSize)
{
if(!deflatedata){
TSK_DEBUG_ERROR("Invalid parameter");
return;
}
deflatedata->zWindowBits = windowSize;
}
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