Function csndInit

libctru/source/services/csnd.c:184–230

}

Result csndInit(void)
{
	Result ret=0;

	if (AtomicPostIncrement(&csndRefCount)) return ret;

	ret = srvGetServiceHandle(&csndHandle, "csnd:SND");
	if (R_FAILED(ret)) goto cleanup0;

	// Calculate offsets and sizes required by the CSND module
	csndOffsets[0] = csndCmdBlockSize;                         // Offset to DSP semaphore and irq disable flags
	csndOffsets[1] = csndOffsets[0] + 8;                       // Offset to sound channel information
	csndOffsets[2] = csndOffsets[1] + 32*sizeof(CSND_ChnInfo); // Offset to capture unit information
	csndOffsets[3] = csndOffsets[2] + 2*8;                     // Offset to the input of command 0x00040080
	csndSharedMemSize = csndOffsets[3] + 0x3C;                 // Total size of the CSND shared memory

	ret = CSND_Initialize(&csndMutex, &csndSharedMemBlock, csndSharedMemSize, csndOffsets);
	if (R_FAILED(ret)) goto cleanup1;

	csndSharedMem = (vu32*)mappableAlloc(csndSharedMemSize);
	if(!csndSharedMem)
	{
		ret = -1;
		goto cleanup1;
	}

	ret = svcMapMemoryBlock(csndSharedMemBlock, (u32)csndSharedMem, MEMPERM_READWRITE, MEMPERM_DONTCARE);
	if (R_FAILED(ret)) goto cleanup2;

	memset((void*)csndSharedMem, 0, csndSharedMemSize);

	ret = CSND_AcquireSoundChannels(&csndChannels);
	if (R_SUCCEEDED(ret)) return 0;

cleanup2:
	svcCloseHandle(csndSharedMemBlock);
	if(csndSharedMem != NULL)
	{
		mappableFree((void*) csndSharedMem);
		csndSharedMem = NULL;
	}
cleanup1:
	svcCloseHandle(csndHandle);
cleanup0:
	AtomicDecrement(&csndRefCount);
	return ret;
}

void csndExit(void)
{