amr_block_buf.cpp

来自「symbian 下的helix player源代码」· C++ 代码 · 共 117 行

/* ***** BEGIN LICENSE BLOCK ***** 
 * Version: RCSL 1.0/RPSL 1.0 
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 * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved. 
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 * the file under the RealNetworks Community Source License Version 1.0 
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 * in which case the RCSL will apply. You may also obtain the license terms 
 * directly from RealNetworks.  You may not use this file except in 
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 * This file is part of the Helix DNA Technology. RealNetworks is the 
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#include "hxtypes.h"
#include "hxcom.h"
#include "hxstrutl.h"
#include "amr_block_buf.h"
#include "amr_frame_info.h"

AMRBlockBuffer::AMRBlockBuffer() :
    m_ulBlockCount(0),
    m_ulBlockSize(0),
    m_ulMaxBlocks(0),
    m_pBlockBuf(0),
    m_pBlockSizes(0)
{}

AMRBlockBuffer::~AMRBlockBuffer()
{
    delete [] m_pBlockBuf;
    m_pBlockBuf = 0;

    delete [] m_pBlockSizes;
    m_pBlockSizes = 0;
}

void AMRBlockBuffer::Init(AMRFlavor flavor, ULONG32 ulChannels)
{
    m_ulBlockSize = 1 + ((CAMRFrameInfo::MaxFrameBits(flavor) + 7) >> 3);

    m_ulBlockCount = 0;
}

void AMRBlockBuffer::SetBlockSize(ULONG32 ulBlockIndex, ULONG32 ulBlockSize)
{
    if (ulBlockIndex < m_ulBlockCount)
	m_pBlockSizes[ulBlockIndex] = ulBlockSize;
}

ULONG32 AMRBlockBuffer::GetBlockSize(ULONG32 ulBlockIndex) const
{
    return (ulBlockIndex < m_ulBlockCount) ? m_pBlockSizes[ulBlockIndex] : 0;
}

UINT8* AMRBlockBuffer::GetBlockBuf(ULONG32 ulBlockIndex) const
{
    UINT8* pRet = 0;

    if (m_pBlockBuf && (ulBlockIndex < m_ulBlockCount))
    {
	pRet = m_pBlockBuf + ulBlockIndex * m_ulBlockSize;
    }

    return pRet;
}

void AMRBlockBuffer::SetBlockCount(ULONG32 ulBlockCount)
{
    if (ulBlockCount > m_ulMaxBlocks)
    {
	Resize(ulBlockCount);
    }

    m_ulBlockCount = ulBlockCount;

    // Clear sizes
    ::memset(m_pBlockSizes, 0, sizeof(ULONG32) * m_ulMaxBlocks);
}

ULONG32 AMRBlockBuffer::GetBlockCount() const
{
    return m_ulBlockCount;
}

void AMRBlockBuffer::Resize(ULONG32 ulBlockCount)
{
    m_ulMaxBlocks = ulBlockCount;
    
    delete [] m_pBlockBuf;
    m_pBlockBuf = new UINT8[m_ulMaxBlocks * m_ulBlockSize];
    
    delete [] m_pBlockSizes;
    m_pBlockSizes = new ULONG32[m_ulMaxBlocks];
    ::memset(m_pBlockSizes, 0, sizeof(ULONG32) * m_ulMaxBlocks);
}