void WavePlayer::Stop()
{
m_ePlayStat = Play_Stop;
UnInit();
OnPlayFinished();
}
void KUiPlayVideo::CloseVideo(bool bFinished)
{
m_nbAlreadyPaintBlack = false;
m_nBlackHeight = m_nBlackWidth = 0;
if(m_bnk)
{
m_KLVideoClose( m_bnk );
m_bnk = NULL;
if (m_uBitmapId)
{
g_pRepresentShell->FreeImage(m_szBitmapName);
m_uBitmapId = 0;
}
if (bFinished)
OnPlayFinished();
}
}
unsigned int WavePlayer::PlayThreadProcImpl()
{
/// 定义为寄存器变量，因为它将会被高频率的使用，用于编译器优化
register ThreadMsg tmsg = TMSG_ALIVE;
/// 线程循环
while (tmsg)
{
// 每次循环后，交出CPU控制权，放在此处，因为下面有continue语句
Sleep(10);
/// 首先检查线程消息
EnterCriticalSection(&m_cs);
tmsg = m_msgPlayThread;
LeaveCriticalSection(&m_cs);
// 线程要结束，退出线程循环
if (!tmsg) break;
// 如果设备为空，表示还没有打开设备，需要打开设备
if (m_hWaveoutDev == NULL)
{
EnterCriticalSection(&m_cs);
MMRESULT mmres = waveOutOpen(&m_hWaveoutDev, WAVE_MAPPER, &m_waveData.wfmtx, (DWORD_PTR)WaveOutProc, (DWORD_PTR)this, CALLBACK_FUNCTION);
LeaveCriticalSection(&m_cs);
if (mmres != MMSYSERR_NOERROR)
{
// failed, try again.
continue;
}
}
// 检查空闲缓存块
EnterCriticalSection(&m_cs);
int free = m_wBlock.wfreeblock;
LeaveCriticalSection(&m_cs);
// 如果没有空闲的缓存了，等待...
if (free < BP_TURN)
{
continue;
}
/////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////
/// < 播放主循环 > ///
/////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////
WAVEHDR *current = NULL;
/// BP_TURN为每次写入播放队列的块数
for (unsigned int m = 0; m < BP_TURN; m++)
{
/// 当前空闲播放缓存块
current = &m_wBlock.pWaveHdr[m_wBlock.wcurrblock];
// 首先需要检查有没有被Unprepare掉
if (current->dwFlags & WHDR_PREPARED)
{
waveOutUnprepareHeader(m_hWaveoutDev, current, sizeof(WAVEHDR));
}
/// 计算剩余需要播放的数据
EnterCriticalSection(&m_cs);
unsigned long left = m_waveData.dwSize - m_wBlock.wpos;
unsigned int bDecodeFinished = m_waveData.bDecodeFinished;
LeaveCriticalSection(&m_cs);
unsigned long chunk = 0;
if (left >= BLOCK_SIZE)
{
chunk = BLOCK_SIZE;
}
else if (!bDecodeFinished)
{
// 如果解码还没有结束，现有的数据量有不足以填满一个缓存块，先不写入缓存
break;
}
else if (left && left < BLOCK_SIZE)
{
chunk = left;
}
else
{
//////////////////////////////////////////////////////////////////////
/// < 播放完成> ///
//////////////////////////////////////////////////////////////////////
/// 获取空闲缓存块数量
EnterCriticalSection(&m_cs);
int free = m_wBlock.wfreeblock;
LeaveCriticalSection(&m_cs);
/// 当所有的缓存块都播放完了，才意味着播放真正完成
if (free == BLOCK_COUNT)
{
/// Unprepare缓存块
for (int j = 0; j < m_wBlock.wfreeblock; j++)
{
if (m_wBlock.pWaveHdr[j].dwFlags & WHDR_PREPARED)
{
waveOutUnprepareHeader(m_hWaveoutDev, &m_wBlock.pWaveHdr[j], sizeof(WAVEHDR));
}
}
// 此时，才算真正的播放完成，关闭线程
tmsg = TMSG_CLOSE;
// 处理播放完成事件
OnPlayFinished();
}
// 此break仅跳出该循环，没有跳出线程循环
break;
}
/// prepare current wave data block header
EnterCriticalSection(&m_cs);
memcpy(current->lpData, &m_waveData.pData[m_wBlock.wpos], chunk);
LeaveCriticalSection(&m_cs);
current->dwBufferLength = chunk; // sizeof block
m_wBlock.wpos += chunk; // update position
/// prepare for playback
waveOutPrepareHeader(m_hWaveoutDev, current, sizeof(WAVEHDR));
/// push to the queue
waveOutWrite(m_hWaveoutDev, current, sizeof(WAVEHDR));
/// 减小空闲块计数
EnterCriticalSection(&m_cs);
m_wBlock.wfreeblock--;
LeaveCriticalSection(&m_cs);
/// 使当前空闲块指向下一个
m_wBlock.wcurrblock++;
m_wBlock.wcurrblock %= BLOCK_COUNT;
}
}/// thread
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
///
/// < force to close device which are still playing >
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
if (m_hWaveoutDev)
{
waveOutReset(m_hWaveoutDev);
/// unprepare any blocks that are still prepared
for (int j = 0; j < BLOCK_COUNT; j++)
{
if (m_wBlock.pWaveHdr[j].dwFlags & WHDR_PREPARED)
{
waveOutUnprepareHeader(m_hWaveoutDev, &m_wBlock.pWaveHdr[j], sizeof(WAVEHDR));
}
}
waveOutClose(m_hWaveoutDev);
m_hWaveoutDev = NULL;
}
return THREAD_EXIT;
}
