WavePlayer::WavePlayer(void)
: m_hWaveoutDev(NULL)
, m_hThreadPlay(NULL)
, m_hThreadDecode(NULL)
, m_hEventDecode(NULL)
, m_ePlayStat(Play_Stop)
, m_pDecoder(NULL)
, m_msgDecodeThread(TMSG_CLOSE)
, m_msgPlayThread(TMSG_CLOSE)
{
memset(&m_waveData, 0, sizeof(WaveData));
// 为播放缓存申请内存堆
m_wBlock.pWaveHdr = allocBlocks(BLOCK_SIZE, BLOCK_COUNT);
m_wBlock.wfreeblock = BLOCK_COUNT;
m_wBlock.wcurrblock = 0;
m_wBlock.wpos = 0;
m_hEventDecode = CreateEvent(NULL, FALSE, FALSE, NULL);
ATLASSERT(m_hEventDecode);
m_pDecoder = new AMRDecoder();
ATLASSERT(m_pDecoder);
// 初始化临界区
InitializeCriticalSection(&m_cs);
}
static bool replaceParentSave(Block* parentSave, int level)
{
Block replacement;
bool success = allocBlocks(level, 1, &replacement);
setBlockStatus(replacement, SUBDIV);
if(!success)
return false;
*parentSave = replacement;
allocForSub(*parentSave);
//have a new (allocated) parent block
//set the allocation status of that to subdiv
return true;
}
void* mmAlloc(size_t size)
{
/*
puts("");
for(int j = 0; j < 60; j++)
putchar('*');
puts(""); */
//printf("Allocating %lu bytes\n", size);
int parentLevel = 2; //start with smallest block and count up
while(blockSize[parentLevel] < size)
{
parentLevel--;
}
int level = parentLevel + 1;
if(level < 0 || level >= LEVELS)
{
//puts("WARNING: Couldn't pick a good block size.");
level = 0;
}
size_t bsize = blockSize[level];
int numBlocks = size / bsize;
if(size % bsize)
numBlocks++;
//printf("Allocating a group of %d blocks of level %d\n", numBlocks, level);
Block first;
bool success = allocBlocks(level, numBlocks, &first);
if(success)
{
//printf("Allocated %lu bytes, block: ", size);
//printBlock(first);
//puts("");
return getBlockPtr(first);
}
else
{
//puts("Allocation failed!");
return NULL;
}
}
