Function ndspFindAndLoadComponent

libctru/source/ndsp/ndsp.c:462–521

}

static bool ndspFindAndLoadComponent(void)
{
	Result rc;
	Handle rsrc;
	void* bin;

	componentProgMask = 0xFF;
	componentDataMask = 0xFF;

	// Try loading the DSP component from the filesystem
	do
	{
		static const char dsp_filename[] = "/3ds/dspfirm.cdc";
		FS_Path archPath = { PATH_EMPTY, 1, "" };
		FS_Path filePath = { PATH_ASCII, sizeof(dsp_filename), dsp_filename };

		rc = FSUSER_OpenFileDirectly(&rsrc, ARCHIVE_SDMC, archPath, filePath, FS_OPEN_READ, 0);
		if (R_FAILED(rc)) break;

		u64 size = 0;
		rc = FSFILE_GetSize(rsrc, &size);
		if (R_FAILED(rc)) { FSFILE_Close(rsrc); break; }

		bin = malloc(size);
		if (!bin) { FSFILE_Close(rsrc); break; }

		u32 dummy = 0;
		rc = FSFILE_Read(rsrc, &dummy, 0, bin, size);
		FSFILE_Close(rsrc);
		if (R_FAILED(rc)) { free(bin); return false; }

		componentBin = bin;
		componentSize = size;
		componentFree = true;
		return true;
	} while (0);

	// Try loading the DSP component from hb:ndsp
	rsrc = envGetHandle("hb:ndsp");
	if (rsrc) do
	{
		extern char* fake_heap_end;
		u32 mapAddr = ((u32)fake_heap_end+0xFFF) &~ 0xFFF;
		rc = svcMapMemoryBlock(rsrc, mapAddr, MEMPERM_READWRITE, MEMPERM_READWRITE);
		if (R_FAILED(rc)) break;

		componentSize = *(u32*)(mapAddr + 0x104);
		bin = malloc(componentSize);
		if (bin)
			memcpy(bin, (void*)mapAddr, componentSize);
		svcUnmapMemoryBlock(rsrc, mapAddr);
		if (!bin) break;

		componentBin = bin;
		componentFree = true;
		return true;
	} while (0);