mirror of
https://github.com/reactos/reactos.git
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138 lines
3.7 KiB
C
138 lines
3.7 KiB
C
/*
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* COPYRIGHT: GPL - See COPYING in the top level directory
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* PROJECT: ReactOS Virtual DOS Machine
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* FILE: speaker.c
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* PURPOSE: PC Speaker emulation
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* PROGRAMMERS: Hermes Belusca-Maito (hermes.belusca@sfr.fr)
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*/
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/* INCLUDES *******************************************************************/
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#define NDEBUG
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#include "emulator.h"
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#include "speaker.h"
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#include "io.h"
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#include "timer.h"
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/* Extra PSDK/NDK Headers */
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#include <ndk/iofuncs.h>
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#include <ndk/obfuncs.h>
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#include <ndk/rtlfuncs.h>
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/* DDK Driver Headers */
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#include <ntddbeep.h>
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/* PRIVATE VARIABLES **********************************************************/
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static HANDLE hBeep = NULL;
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/* PRIVATE FUNCTIONS **********************************************************/
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static DWORD OldReloadValue = 0;
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static PIT_MODE OldMode = 0;
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/* PUBLIC FUNCTIONS ***********************************************************/
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VOID PlaySound(DWORD Frequency,
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DWORD Duration)
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{
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/* Adapted from kernel32:Beep() */
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IO_STATUS_BLOCK IoStatusBlock;
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BEEP_SET_PARAMETERS BeepSetParameters;
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/* Set beep data */
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BeepSetParameters.Frequency = Frequency;
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BeepSetParameters.Duration = Duration;
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/* Send the beep */
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NtDeviceIoControlFile(hBeep,
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NULL,
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NULL,
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NULL,
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&IoStatusBlock,
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IOCTL_BEEP_SET,
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&BeepSetParameters,
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sizeof(BeepSetParameters),
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NULL,
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0);
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}
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VOID SpeakerChange(VOID)
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{
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BYTE Port61hState = IOReadB(CONTROL_SYSTEM_PORT61H);
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BOOLEAN IsConnectedToPITChannel2 = !!(Port61hState & 0x01);
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BOOLEAN SpeakerDataOn = !!(Port61hState & 0x02);
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if (PitChannel2 && IsConnectedToPITChannel2 && SpeakerDataOn)
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{
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/* Start beeping */
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DWORD Frequency, Duration;
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DWORD PitChannel2ReloadValue = PitChannel2->ReloadValue;
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if (PitChannel2ReloadValue == 0) PitChannel2ReloadValue = 65536;
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DPRINT("(1) PitChannel2(Mode = %d ; ReloadValue = %d)\n", PitChannel2->Mode, PitChannel2ReloadValue);
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if (OldMode == PitChannel2->Mode && OldReloadValue == PitChannel2ReloadValue)
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return;
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OldMode = PitChannel2->Mode;
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OldReloadValue = PitChannel2ReloadValue;
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DPRINT("(2) PitChannel2(Mode = %d ; ReloadValue = %d)\n", PitChannel2->Mode, PitChannel2ReloadValue);
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Frequency = (PIT_BASE_FREQUENCY / PitChannel2ReloadValue);
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Duration = INFINITE;
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PlaySound(Frequency, Duration);
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}
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else
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{
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/* Stop beeping */
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OldMode = 0;
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OldReloadValue = 0;
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PlaySound(0x00, 0x00);
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}
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}
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VOID SpeakerInitialize(VOID)
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{
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NTSTATUS Status;
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UNICODE_STRING BeepDevice;
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OBJECT_ATTRIBUTES ObjectAttributes;
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IO_STATUS_BLOCK IoStatusBlock;
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/* Adapted from kernel32:Beep() */
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/* Open the device */
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RtlInitUnicodeString(&BeepDevice, L"\\Device\\Beep");
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InitializeObjectAttributes(&ObjectAttributes, &BeepDevice, 0, NULL, NULL);
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Status = NtCreateFile(&hBeep,
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FILE_READ_DATA | FILE_WRITE_DATA,
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&ObjectAttributes,
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&IoStatusBlock,
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NULL,
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0,
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FILE_SHARE_READ | FILE_SHARE_WRITE,
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FILE_OPEN_IF,
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0,
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NULL,
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0);
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("Failed to open Beep driver, Status 0x%08lx\n", Status);
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}
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}
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VOID SpeakerCleanup(VOID)
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{
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NtClose(hBeep);
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}
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/* EOF */
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