113 lines
2.6 KiB
C
113 lines
2.6 KiB
C
/*
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** Copyright 2003-2010, VisualOn, Inc.
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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/*******************************************************************************
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File: mem_align.c
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Content: Memory alloc alignments functions
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*******************************************************************************/
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#include "memalign.h"
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#ifdef _MSC_VER
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#include <stddef.h>
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#else
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#include <stdint.h>
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#endif
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/*****************************************************************************
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*
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* function name: mem_malloc
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* description: malloc the alignments memory
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* returns: the point of the memory
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*
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**********************************************************************************/
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void *
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mem_malloc(VO_MEM_OPERATOR *pMemop, unsigned int size, unsigned char alignment, unsigned int CodecID)
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{
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int ret;
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unsigned char *mem_ptr;
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VO_MEM_INFO MemInfo;
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if (!alignment) {
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MemInfo.Flag = 0;
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MemInfo.Size = size + 1;
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ret = pMemop->Alloc(CodecID, &MemInfo);
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if(ret != 0)
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return 0;
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mem_ptr = (unsigned char *)MemInfo.VBuffer;
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pMemop->Set(CodecID, mem_ptr, 0, size + 1);
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*mem_ptr = (unsigned char)1;
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return ((void *)(mem_ptr+1));
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} else {
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unsigned char *tmp;
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MemInfo.Flag = 0;
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MemInfo.Size = size + alignment;
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ret = pMemop->Alloc(CodecID, &MemInfo);
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if(ret != 0)
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return 0;
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tmp = (unsigned char *)MemInfo.VBuffer;
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pMemop->Set(CodecID, tmp, 0, size + alignment);
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mem_ptr =
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(unsigned char *) ((intptr_t) (tmp + alignment - 1) &
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(~((intptr_t) (alignment - 1))));
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if (mem_ptr == tmp)
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mem_ptr += alignment;
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*(mem_ptr - 1) = (unsigned char) (mem_ptr - tmp);
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return ((void *)mem_ptr);
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}
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return(0);
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}
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/*****************************************************************************
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*
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* function name: mem_free
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* description: free the memory
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*
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*******************************************************************************/
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void
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mem_free(VO_MEM_OPERATOR *pMemop, void *mem_ptr, unsigned int CodecID)
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{
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unsigned char *ptr;
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if (mem_ptr == 0)
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return;
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ptr = mem_ptr;
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ptr -= *(ptr - 1);
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pMemop->Free(CodecID, ptr);
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}
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