C++ IDirectSoundBuffer_Unlock函数代码示例

/*
====================
SndSys_UnlockRenderBuffer

Release the exclusive lock on "snd_renderbuffer"
====================
*/
void SndSys_UnlockRenderBuffer (void)
{
#ifdef SUPPORTDIRECTX
	if (pDSBuf)
		IDirectSoundBuffer_Unlock(pDSBuf, dsound_pbuf, dsound_dwSize, dsound_pbuf2, dsound_dwSize2);
#endif
}

HRESULT DSW_ZeroEmptySpace( DSoundWrapper *dsw )
{
	HRESULT hr;
	LPBYTE lpbuf1 = NULL;
	LPBYTE lpbuf2 = NULL;
	DWORD dwsize1 = 0;
	DWORD dwsize2 = 0;
	long  bytesEmpty;
	hr = DSW_QueryOutputSpace( dsw, &bytesEmpty ); // updates dsw_FramesPlayed
	if (hr != DS_OK) return hr;
	if( bytesEmpty == 0 ) return DS_OK;
	// Lock free space in the DS
	hr = IDirectSoundBuffer_Lock( dsw->dsw_OutputBuffer, dsw->dsw_WriteOffset, bytesEmpty, (void **) &lpbuf1, &dwsize1,
		(void **) &lpbuf2, &dwsize2, 0);
	if (hr == DS_OK)
	{
		// Copy the buffer into the DS
		ZeroMemory(lpbuf1, dwsize1);
		if(lpbuf2 != NULL)
		{
			ZeroMemory(lpbuf2, dwsize2);
		}
		// Update our buffer offset and unlock sound buffer
 		dsw->dsw_WriteOffset = (dsw->dsw_WriteOffset + dwsize1 + dwsize2) % dsw->dsw_OutputSize;
		IDirectSoundBuffer_Unlock( dsw->dsw_OutputBuffer, lpbuf1, dwsize1, lpbuf2, dwsize2);
		dsw->dsw_FramesWritten += bytesEmpty / dsw->dsw_BytesPerFrame;
	}
	return hr;
}

static void DS_Update(void)
{
	LPVOID block;
	DWORD bBytes;

	/* Do first update in DS_Update() to be consistent with other
	   non threaded drivers. */
	if (do_update && pSoundBuffer) {
		do_update = 0;

		if (IDirectSoundBuffer_Lock(pSoundBuffer, 0, fragsize, &block, &bBytes, NULL, NULL, 0)
											== DSERR_BUFFERLOST) {
			IDirectSoundBuffer_Restore (pSoundBuffer);
			IDirectSoundBuffer_Lock (pSoundBuffer, 0, fragsize, &block, &bBytes, NULL, NULL, 0);
		}

		if (Player_Paused_internal()) {
			VC_SilenceBytes ((SBYTE *)block, (ULONG)bBytes);
		} else {
			VC_WriteBytes ((SBYTE *)block, (ULONG)bBytes);
		}

		IDirectSoundBuffer_Unlock (pSoundBuffer, block, bBytes, NULL, 0);

		IDirectSoundBuffer_SetCurrentPosition(pSoundBuffer, 0);
		IDirectSoundBuffer_Play(pSoundBuffer, 0, 0, DSBPLAY_LOOPING);

		threadInUse=1;
		ResumeThread (updateBufferHandle);
	}
}

static BOOL AppWriteDataToBuffer(LPDIRECTSOUNDBUFFER lpDsb,  // The buffer.
				 DWORD dwOffset,	      // Our own write cursor.
				 LPBYTE lpbSoundData,	      // Start of our data.
				 DWORD dwSoundBytes)	      // Size of block to copy.
{ 
    LPVOID  lpvPtr1; 
    DWORD dwBytes1; 
    LPVOID  lpvPtr2; 
    DWORD dwBytes2; 
    HRESULT hr; 
    
    // Obtain memory address of write block. This will be in two parts
    // if the block wraps around.
    
    hr = IDirectSoundBuffer_Lock( lpDsb, dwOffset, dwSoundBytes, &lpvPtr1, 
				  &dwBytes1, &lpvPtr2, &dwBytes2, 0); 
    
    // If the buffer was lost, restore and retry lock. 
    if (DSERR_BUFFERLOST == hr) { 
	IDirectSoundBuffer_Restore(lpDsb); 
	hr = IDirectSoundBuffer_Lock( lpDsb, dwOffset, dwSoundBytes, 
				      &lpvPtr1, &dwBytes1, &lpvPtr2, &dwBytes2, 0); 
    } 
    if SUCCEEDED(hr) { 
	pj_memcpy(lpvPtr1, lpbSoundData, dwBytes1); 
	if (NULL != lpvPtr2) 
	    pj_memcpy(lpvPtr2, lpbSoundData+dwBytes1, dwBytes2); 
	
	hr = IDirectSoundBuffer_Unlock(lpDsb, lpvPtr1, dwBytes1, lpvPtr2, dwBytes2); 
	if SUCCEEDED(hr)
	    return TRUE; 
    } 
    
    return FALSE; 
}

HRESULT DSW_WriteBlock( DSoundWrapper *dsw, char *buf, long numBytes )
{
	HRESULT hr;
	LPBYTE lpbuf1 = NULL;
	LPBYTE lpbuf2 = NULL;
	DWORD dwsize1 = 0;
	DWORD dwsize2 = 0;
	// Lock free space in the DS
	hr = IDirectSoundBuffer_Lock( dsw->dsw_OutputBuffer, dsw->dsw_WriteOffset, numBytes, (void **) &lpbuf1, &dwsize1,
		(void **) &lpbuf2, &dwsize2, 0);
	if (hr == DS_OK)
	{
		// Copy the buffer into the DS
		CopyMemory(lpbuf1, buf, dwsize1);
		if(lpbuf2 != NULL)
		{
			CopyMemory(lpbuf2, buf+dwsize1, dwsize2);
		}
		// Update our buffer offset and unlock sound buffer
 		dsw->dsw_WriteOffset = (dsw->dsw_WriteOffset + dwsize1 + dwsize2) % dsw->dsw_OutputSize;
		IDirectSoundBuffer_Unlock( dsw->dsw_OutputBuffer, lpbuf1, dwsize1, lpbuf2, dwsize2);
		dsw->dsw_FramesWritten += numBytes / dsw->dsw_BytesPerFrame;
	}
	return hr;
}

static void dx_clear(void)
{
LPVOID  lpvPtr1;
DWORD   dwBytes1;
LPVOID  lpvPtr2;
DWORD   dwBytes2;
HRESULT result;

    result = IDirectSoundBuffer_Lock(buffer, 0, buffer_size,
                                     &lpvPtr1, &dwBytes1, &lpvPtr2,
                                     &dwBytes2, 0);
    if (result == DSERR_BUFFERLOST) {
        IDirectSoundBuffer_Restore(buffer);
    } else {
        if (is16bit) {
            memset(lpvPtr1, 0, dwBytes1);
            if (lpvPtr2) memset(lpvPtr2, 0, dwBytes2);
        } else {
            memset(lpvPtr1, 0x80, dwBytes1);
            if (lpvPtr2) memset(lpvPtr2, 0x80, dwBytes2);
        }
        result = IDirectSoundBuffer_Unlock(buffer, lpvPtr1, dwBytes1,
                                           lpvPtr2, dwBytes2);
    }
}

void m1sdr_TimeCheck(void)
{
	int nPlaySeg=0, nFollowingSeg=0;
	DWORD nPlay=0, nWrite=0;
	int nRet=0;

	if (!lpDS) return;

	// We should do nothing until nPlay has left nDSoundNextSeg
	IDirectSoundBuffer_GetCurrentPosition(lpSecB, &nPlay, &nWrite);

	nPlaySeg=nPlay/(nDSoundSegLen<<2);

	if (nPlaySeg>nDSoundSegCount-1) nPlaySeg=nDSoundSegCount-1;
	if (nPlaySeg<0) nPlaySeg=0; // important to ensure nPlaySeg clipped for below

	if (nDSoundNextSeg == nPlaySeg)
	{
		Sleep(200); // Don't need to do anything for a bit
		goto End;
	}

	// work out which seg we will fill next
	nFollowingSeg = nDSoundNextSeg; 
	WRAP_INC(nFollowingSeg)

	while (nDSoundNextSeg != nPlaySeg)
	{
		void *pData=NULL,*pData2=NULL; DWORD cbLen=0,cbLen2=0;

		// fill nNextSeg
		// Lock the relevant seg of the loop buffer
		nRet = IDirectSoundBuffer_Lock(lpSecB, nDSoundNextSeg*(nDSoundSegLen<<2), nDSoundSegLen<<2, &pData, &cbLen, &pData2, &cbLen2, 0);

		if (nRet>=0 && pData!=NULL)
		{
		  // Locked the seg okay - write the sound we calculated last time
			memcpy(pData, samples, nDSoundSegLen<<2);
		}
		// Unlock (2nd 0 is because we wrote nothing to second part)
		if (nRet>=0) IDirectSoundBuffer_Unlock(lpSecB, pData, cbLen, pData2, 0); 

		// generate more samples
		if (m1sdr_Callback)
		{
			m1sdr_Callback(nDSoundSegLen, samples);
			playtime++;
		}
		else
		{
			memset(samples, 0, nDSoundSegLen*4);
		}

		nDSoundNextSeg = nFollowingSeg;
		WRAP_INC(nFollowingSeg)
	}

End:
	return;
}

static void DX5_PlayAudio(_THIS)
{
	/* Unlock the buffer, allowing it to play */
	if ( locked_buf ) {
		IDirectSoundBuffer_Unlock(mixbuf, locked_buf, mixlen, NULL, 0);
	}

}

void DSSoundFeedVoiceData(unsigned char* pSound,long lBytes)
{
	LPVOID lpvPtr1, lpvPtr2;
	unsigned long dwBytes1,dwBytes2;
	unsigned long *lpSS, *lpSD;
	unsigned long dw,cplay,cwrite;
	HRESULT hr;
	unsigned long status;

	IDirectSoundBuffer_GetStatus(lpDSBSECONDARY1,&status);
	if (status & DSBSTATUS_BUFFERLOST)
	{
		if (IDirectSoundBuffer_Restore(lpDSBSECONDARY1) != DS_OK) return;
		IDirectSoundBuffer_Play(lpDSBSECONDARY1,0,0,DSBPLAY_LOOPING);
	}

	IDirectSoundBuffer_GetCurrentPosition(lpDSBSECONDARY1,&cplay,&cwrite);

	if(LastWrite == 0xffffffff) LastWrite=cwrite;

	hr = IDirectSoundBuffer_Lock(lpDSBSECONDARY1,LastWrite,lBytes,
        &lpvPtr1, &dwBytes1, &lpvPtr2, &dwBytes2, 0);

	if (hr != DS_OK)
	{
		LastWrite=0xffffffff;
		return;
	}

	lpSS = (unsigned long *)pSound;
	lpSD = (unsigned long *)lpvPtr1;
	dw = dwBytes1 >> 2;

	while(dw)
	{
		*lpSD++=*lpSS++;
		dw--;
	}

	if (lpvPtr2)
	{
		lpSD = (unsigned long *)lpvPtr2;
		dw = dwBytes2 >> 2;

		while(dw)
		{
			*lpSD++ = *lpSS++;
			dw--;
		}
	}

	IDirectSoundBuffer_Unlock(lpDSBSECONDARY1,lpvPtr1,dwBytes1,lpvPtr2,dwBytes2);
	LastWrite += lBytes;
	if(LastWrite >= SOUNDSIZE) LastWrite -= SOUNDSIZE;
	LastPlay = cplay;
}

/**
\brief fill sound buffer
\param data pointer to the sound data to copy
\param len length of the data to copy in bytes
\return number of copyed bytes
*/
static int write_buffer(struct ao *ao, unsigned char *data, int len)
{
    struct priv *p = ao->priv;
    HRESULT res;
    LPVOID lpvPtr1;
    DWORD dwBytes1;
    LPVOID lpvPtr2;
    DWORD dwBytes2;

    p->underrun_check = 0;

    // Lock the buffer
    res = IDirectSoundBuffer_Lock(p->hdsbuf, p->write_offset, len, &lpvPtr1,
                                  &dwBytes1, &lpvPtr2, &dwBytes2, 0);
    // If the buffer was lost, restore and retry lock.
    if (DSERR_BUFFERLOST == res) {
        IDirectSoundBuffer_Restore(p->hdsbuf);
        res = IDirectSoundBuffer_Lock(p->hdsbuf, p->write_offset, len, &lpvPtr1,
                                      &dwBytes1, &lpvPtr2, &dwBytes2, 0);
    }


    if (SUCCEEDED(res)) {
        if (!AF_FORMAT_IS_AC3(ao->format)) {
            memcpy(lpvPtr1, data, dwBytes1);
            if (lpvPtr2 != NULL)
                memcpy(lpvPtr2, (char *)data + dwBytes1, dwBytes2);

            p->write_offset += dwBytes1 + dwBytes2;
            if (p->write_offset >= p->buffer_size)
                p->write_offset = dwBytes2;
        } else {
            // Write to pointers without reordering.
            memcpy(lpvPtr1, data, dwBytes1);
            if (NULL != lpvPtr2)
                memcpy(lpvPtr2, data + dwBytes1, dwBytes2);
            p->write_offset += dwBytes1 + dwBytes2;
            if (p->write_offset >= p->buffer_size)
                p->write_offset = dwBytes2;
        }

        // Release the data back to DirectSound.
        res = IDirectSoundBuffer_Unlock(p->hdsbuf, lpvPtr1, dwBytes1, lpvPtr2,
                                        dwBytes2);
        if (SUCCEEDED(res)) {
            // Success.
            DWORD status;
            IDirectSoundBuffer_GetStatus(p->hdsbuf, &status);
            if (!(status & DSBSTATUS_PLAYING))
                res = IDirectSoundBuffer_Play(p->hdsbuf, 0, 0, DSBPLAY_LOOPING);
            return dwBytes1 + dwBytes2;
        }
    }
    // Lock, Unlock, or Restore failed.
    return 0;
}

static void
DSOUND_PlayDevice(_THIS)
{
    /* Unlock the buffer, allowing it to play */
    if (this->hidden->locked_buf) {
        IDirectSoundBuffer_Unlock(this->hidden->mixbuf,
                                  this->hidden->locked_buf,
                                  this->spec.size, NULL, 0);
    }
}

static void dsound_clear_buffer(dsound_t *ds)
{
   IDirectSoundBuffer_SetCurrentPosition(ds->dsb, 0);
   void *ptr;
   DWORD size;

   if (IDirectSoundBuffer_Lock(ds->dsb, 0, 0, &ptr, &size, NULL, NULL, DSBLOCK_ENTIREBUFFER) == DS_OK)
   {
      memset(ptr, 0, size);
      IDirectSoundBuffer_Unlock(ds->dsb, ptr, size, NULL, 0);
   }
}

static void clear_buffers(ds_t *ds)
{
    ds->writering = ds->rings - 1;

    DWORD size;
    void *output;
    if (IDirectSoundBuffer_Lock(ds->dsb, 0, 0, &output, &size, 0, 0, DSBLOCK_ENTIREBUFFER) == DS_OK)
    {
        memset(output, 0, size);
        IDirectSoundBuffer_Unlock(ds->dsb, output, size, 0, 0);
    }
}

int DSOUND_UpdatePlayback(soundplay_t *sp, int samplechunks, char *buffer)
{
	int ret;
	dsplay_t *dsp = (dsplay_t*)sp;
	char *sbuf;
	int sbufsize;
	int writable;
	int remaining = samplechunks;

	if (!samplechunks)
		return 0;

	IDirectSoundBuffer_GetCurrentPosition(dsp->dsbuf, &dsp->readpos, NULL);
	dsp->readpos /= dsp->sampbytes;

	while (ret = IDirectSoundBuffer_Lock(dsp->dsbuf, 0, dsp->buffersize*dsp->sampbytes, (void**)&sbuf, &sbufsize, NULL, NULL, 0))
	{
		if (!FAILED(ret))
			break;
		if (ret == DSERR_BUFFERLOST)
			printf("Buffer lost\n");
		else
			break;

//			if (FAILED(IDirectSoundBuffer_Resore(dsp->dsbuf)))
//				return 0;
	}
	//memset(sbuf, 0, sbufsize);
	writable = remaining;
	if (writable > sbufsize/dsp->sampbytes - dsp->writepos)
		writable = sbufsize/dsp->sampbytes - dsp->writepos;
	memcpy(sbuf+dsp->writepos*dsp->sampbytes, buffer, writable*dsp->sampbytes);
	remaining -= writable;
	buffer += writable*dsp->sampbytes;
	dsp->writepos += writable;
	dsp->writepos %= dsp->buffersize;
	if (samplechunks > 0)
	{
		writable = remaining;
		if (writable > dsp->readpos)
			writable = dsp->readpos;
		memcpy(sbuf, buffer, writable*dsp->sampbytes);
		remaining -= writable;
		dsp->writepos += writable;
		dsp->writepos %= dsp->buffersize;
	}
	IDirectSoundBuffer_Unlock(dsp->dsbuf, sbuf, sbufsize, NULL, 0);

	printf("%i %i\n", 100*dsp->readpos / dsp->buffersize, 100*dsp->writepos / dsp->buffersize);

	return samplechunks - remaining;
}

static HRESULT DSoundRender_SendSampleData(DSoundRenderImpl* This, REFERENCE_TIME tStart, REFERENCE_TIME tStop, const BYTE *data, DWORD size)
{
    HRESULT hr;

    while (size && This->renderer.filter.state != State_Stopped) {
        DWORD writepos, skip = 0, free, size1, size2, ret;
        BYTE *buf1, *buf2;

        if (This->renderer.filter.state == State_Running)
            hr = DSoundRender_GetWritePos(This, &writepos, tStart, &free, &skip);
        else
            hr = S_FALSE;

        if (hr != S_OK) {
            This->in_loop = 1;
            LeaveCriticalSection(&This->renderer.csRenderLock);
            ret = WaitForSingleObject(This->blocked, 10);
            EnterCriticalSection(&This->renderer.csRenderLock);
            This->in_loop = 0;
            if (This->renderer.pInputPin->flushing ||
                This->renderer.filter.state == State_Stopped) {
                return This->renderer.filter.state == State_Paused ? S_OK : VFW_E_WRONG_STATE;
            }
            if (ret != WAIT_TIMEOUT)
                ERR("%x\n", ret);
            continue;
        }
        tStart = -1;

        if (skip)
            FIXME("Sample dropped %u of %u bytes\n", skip, size);
        if (skip >= size)
            return S_OK;
        data += skip;
        size -= skip;

        hr = IDirectSoundBuffer_Lock(This->dsbuffer, writepos, min(free, size), (void**)&buf1, &size1, (void**)&buf2, &size2, 0);
        if (hr != DS_OK) {
            ERR("Unable to lock sound buffer! (%x)\n", hr);
            break;
        }
        memcpy(buf1, data, size1);
        if (size2)
            memcpy(buf2, data+size1, size2);
        IDirectSoundBuffer_Unlock(This->dsbuffer, buf1, size1, buf2, size2);
        This->writepos = (writepos + size1 + size2) % This->buf_size;
        TRACE("Wrote %u bytes at %u, next at %u - (%u/%u)\n", size1+size2, writepos, This->writepos, free, size);
        data += size1 + size2;
        size -= size1 + size2;
    }
    return S_OK;
}