|
|
/*++
Copyright (C) Microsoft Corporation, 1998 - 1999
Module Name:
thread.c
Abstract:
Author:
Environment:
kernel mode only
Notes:
Revision History:
--*/
#include "redbook.h"
#include "ntddredb.h"
#include "proto.h"
#include <scsi.h> // for SetKnownGoodDrive()
#include <stdio.h> // vsprintf()
#include "thread.tmh"
//
// this is how many seconds until resources are free'd from
// a play, and also how long (in seconds) before a frozen state
// is detected (and a fix attempted).
//
#define REDBOOK_THREAD_FIXUP_SECONDS 10
#define REDBOOK_THREAD_SYSAUDIO_CACHE_SECONDS 2
#define REDBOOK_PERFORM_STUTTER_CONTROL 0
#if DBG
//
// allows me to send silence to ks as needed
//
ULONG RedBookForceSilence = FALSE;
#endif
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, RedBookAllocatePlayResources )
#pragma alloc_text(PAGE, RedBookCacheToc )
#pragma alloc_text(PAGE, RedBookDeallocatePlayResources )
#pragma alloc_text(PAGERW, RedBookReadRaw )
#pragma alloc_text(PAGERW, RedBookStream )
#pragma alloc_text(PAGE, RedBookSystemThread )
#pragma alloc_text(PAGE, RedBookCheckForAudioDeviceRemoval )
#pragma alloc_text(PAGE, RedBookThreadDigitalHandler )
/*
but last two CANNOT be unlocked when playing, so they are (temporarily) commented out. eventually will only have them locked when playing
#pragma alloc_text(PAGERW, RedBookReadRawCompletion )
#pragma alloc_text(PAGERW, RedBookStreamCompletion )
*/
#endif ALLOC_PRAGMA
VOIDRedBookSystemThread( PVOID Context )/*++
Routine Description:
This system thread will wait on events, sending buffers to Kernel Streaming as they become available.
Arguments:
Context - deviceExtension
Return Value:
status
--*/{ PREDBOOK_DEVICE_EXTENSION deviceExtension = Context; LARGE_INTEGER timeout; NTSTATUS waitStatus; NTSTATUS status; ULONG i; ULONG timeouts; LARGE_INTEGER stopTime;
//
// some per-thread state
//
BOOLEAN killed = FALSE;
PAGED_CODE();
deviceExtension->Thread.SelfPointer = PsGetCurrentThread(); //
// perf fix -- run at low realtime priority
//
KeSetPriorityThread(KeGetCurrentThread(), LOW_REALTIME_PRIORITY); timeouts = 0; stopTime.QuadPart = 0;
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "Thread => UpdateMixerPin at %p\n", &deviceExtension->Stream.UpdateMixerPin));
//
// Just loop waiting for events.
//
//waitForNextEvent:
while ( 1 ) {
//
// if are killed, just wait on singular event--EVENT_DIGITAL until
// can finish processing. there should not be anything left in the
// IOCTL_LIST (since the kill calls RemoveLockAndWait() first)
//
// this also implies that a kill will never occur while ioctls are
// still being processed. this does not guarantee the state will
// be STOPPED, just that no IO will be occurring.
//
//
// nanosecond is 10^-9, units is 100 nanoseconds
// so seconds is 10,000,000 units
// must wait in relative time, which requires negative numbers
//
timeout.QuadPart = (LONGLONG)(-1 * 10 * 1000 * (LONGLONG)1000);
//
// note: we are using a timeout mechanism mostly to catch bugs
// where the state would lock up. we also "auto adjust"
// our internal state if things get too wierd, basically
// auto-fixing ourselves. note that this does cause the
// thread's stack to be swapped in, so this shouldn't
// be done when we're 100% stopped.
//
if (deviceExtension->Thread.IoctlCurrent == NULL) { //
// wait on an ioctl, but not the ioctl completion event
//
ULONG state = GetCdromState(deviceExtension); if ((state == CD_STOPPED) && (!RedBookArePlayResourcesAllocated(deviceExtension)) ) {
//
// if we've got no current ioctl and we haven't allocated
// any resources, there're no need to timeout.
// this will prevent this stack from getting swapped in
// needlessly, reducing effective footprint a bit
//
stopTime.QuadPart = 0; waitStatus = KeWaitForMultipleObjects(EVENT_MAXIMUM - 1, (PVOID)(&deviceExtension->Thread.Events[0]), WaitAny, Executive, UserMode, FALSE, // Alertable
NULL, deviceExtension->Thread.EventBlock );
} else {
//
// we've got no current ioctl, but we're also not stopped.
// it is also possible to be waiting to cleanup resources here.
// even if we're paused, we want to keep track of what's
// going on, since it's possible for the state to get
// messed up here.
//
waitStatus = KeWaitForMultipleObjects(EVENT_MAXIMUM - 1, (PVOID)(&deviceExtension->Thread.Events[0]), WaitAny, Executive, UserMode, FALSE, // Alertable
&timeout, deviceExtension->Thread.EventBlock );
}
} else { //
// wait on the ioctl completion, but not the ioctl event
//
waitStatus = KeWaitForMultipleObjects(EVENT_MAXIMUM - 1, (PVOID)(&deviceExtension->Thread.Events[1]), WaitAny, Executive, UserMode, FALSE, // Alertable
&timeout, deviceExtension->Thread.EventBlock ); if (waitStatus != STATUS_TIMEOUT) { waitStatus ++; // to account for offset
}
}
//
// need to check if we are stopped for too long -- if so, free
// the resources.
//
{ ULONG state = GetCdromState(deviceExtension);
if (!TEST_FLAG(state, CD_PLAYING) && !TEST_FLAG(state, CD_PAUSED)) { LARGE_INTEGER now; // not playing,
if (stopTime.QuadPart == 0) { LONGLONG offset; KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "StopTime => Determining when to dealloc\n")); // query the time
KeQueryTickCount( &stopTime ); // add appropriate offset
// nanosecond is 10^-9, units is 100 nanoseconds
// so seconds is 10,000,000 units
//
offset = REDBOOK_THREAD_SYSAUDIO_CACHE_SECONDS; offset *= (LONGLONG)(10 * 1000 * (LONGLONG)1000); // divide offset by time increment
offset /= (LONGLONG)KeQueryTimeIncrement(); // add those ticks to store when we should release
// our resources
stopTime.QuadPart += offset; } KeQueryTickCount(&now); KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "StopTime => Is %I64x >= %I64x?\n", now.QuadPart, stopTime.QuadPart )); if (now.QuadPart >= stopTime.QuadPart) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "StopTime => Deallocating resources\n")); RedBookDeallocatePlayResources(deviceExtension); } } else { stopTime.QuadPart = 0; } }
RedBookCheckForAudioDeviceRemoval(deviceExtension);
//
// To enable a single thread for multiple cdroms, just set events
// at offset of (DEVICE_ID * EVENT_MAX) + EVENT_TO_SET
// set deviceExtension = waitStatus / EVENT_MAX
// switch ( waitStatus % EVENT_MAX )
//
if (waitStatus == EVENT_DIGITAL) { timeouts = 0; }
switch ( waitStatus ) {
case EVENT_IOCTL: {
PLIST_ENTRY listEntry; while ((listEntry = ExInterlockedRemoveHeadList( &deviceExtension->Thread.IoctlList, &deviceExtension->Thread.IoctlLock)) != NULL) {
RedBookThreadIoctlHandler(deviceExtension, listEntry);
if (deviceExtension->Thread.IoctlCurrent) { // special case
break; }
}
break; } case EVENT_COMPLETE: { RedBookThreadIoctlCompletionHandler(deviceExtension); break; }
case EVENT_WMI: {
PLIST_ENTRY listEntry; while ((listEntry = ExInterlockedRemoveHeadList( &deviceExtension->Thread.WmiList, &deviceExtension->Thread.WmiLock)) != NULL) {
RedBookThreadWmiHandler(deviceExtension, listEntry);
} break; }
case EVENT_DIGITAL: {
PLIST_ENTRY listEntry; while ((listEntry = ExInterlockedRemoveHeadList( &deviceExtension->Thread.DigitalList, &deviceExtension->Thread.DigitalLock)) != NULL) {
RedBookThreadDigitalHandler(deviceExtension, listEntry);
} break; }
case EVENT_KILL_THREAD: {
ULONG state = GetCdromState(deviceExtension);
killed = TRUE;
//
// i don't think this can occur with outstanding io, since
// the remove lock is taken first. nonetheless, it's better
// to be safe than sorry.
//
if (!TEST_FLAG(state, CD_STOPPED)) { state = SetCdromState(deviceExtension, state, CD_STOPPING); break; }
RedBookDeallocatePlayResources(deviceExtension);
//
// else we can safely terminate.
//
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "STExit => Thread was killed\n")); ASSERT(deviceExtension->Thread.PendingRead == 0); ASSERT(deviceExtension->Thread.PendingStream == 0); PsTerminateSystemThread(STATUS_SUCCESS); ASSERT(!"[redbook] Thread should never reach past self-terminate code"); break; }
case STATUS_TIMEOUT: {
ULONG state = GetCdromState(deviceExtension);
timeouts++;
if (timeouts < REDBOOK_THREAD_FIXUP_SECONDS) { break; } else { timeouts = 0; }
//
// these tests all occur once every ten seconds.
// the most basic case is where we want to deallocate
// our cached TOC, but we also perform lots of
// sanity testing here -- ASSERTing on CHK builds and
// trying to fix ourselves up when possible.
//
if (!TEST_FLAG(state, CD_PLAYING) && !TEST_FLAG(state, CD_PAUSED)) { // !handling ioctls
// not playing, so free resources
RedBookDeallocatePlayResources(deviceExtension);
} else if (TEST_FLAG(state, CD_STOPPING)) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugError, "[redbook] " "STTime !! %x seconds inactivity\n", REDBOOK_THREAD_FIXUP_SECONDS));
if (IsListEmpty(&deviceExtension->Thread.DigitalList)) {
if ((deviceExtension->Thread.PendingRead == 0) && (deviceExtension->Thread.PendingStream == 0) && (deviceExtension->Thread.IoctlCurrent != NULL)) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugError, "[redbook] " "STTime !! No Reads, No Streams, In a temp " "state (%x) and have STOP irp %p " "pending?!\n", state, ((PREDBOOK_THREAD_IOCTL_DATA)deviceExtension->Thread.IoctlCurrent)->Irp )); ASSERT(!"STTime !! CD_STOPPING Fixup with no reads nor streams but STOP pending\n"); SetCdromState(deviceExtension, state, CD_STOPPED); KeSetEvent(deviceExtension->Thread.Events[EVENT_COMPLETE], IO_NO_INCREMENT, FALSE); } else {
ASSERT(!"STTime !! CD_STOPPING Fixup with empty list and no pending ioctl?\n");
}
} else { ASSERT(!"STTime !! CD_STOPPING Fixup with list items\n"); KeSetEvent(deviceExtension->Thread.Events[EVENT_DIGITAL], IO_NO_INCREMENT, FALSE);
}
} else if (TEST_FLAG(state, CD_PAUSING)) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugError, "[redbook] " "STTime !! %x seconds inactivity\n", REDBOOK_THREAD_FIXUP_SECONDS));
if (IsListEmpty(&deviceExtension->Thread.DigitalList)) { if ((deviceExtension->Thread.PendingRead == 0) && (deviceExtension->Thread.PendingStream == 0) && (deviceExtension->Thread.IoctlCurrent != NULL)) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugError, "[redbook] " "STTime !! No Reads, No Streams, In a temp " "state (%x) and have PAUSE irp %p " "pending?!\n", state, ((PREDBOOK_THREAD_IOCTL_DATA)deviceExtension->Thread.IoctlCurrent)->Irp )); ASSERT(!"STTime !! CD_PAUSING Fixup with no reads nor streams but PAUSE pending\n"); SetCdromState(deviceExtension, state, CD_PAUSED); KeSetEvent(deviceExtension->Thread.Events[EVENT_COMPLETE], IO_NO_INCREMENT, FALSE); } else {
ASSERT(!"STTime !! CD_PAUSING Fixup with empty list and no pending ioctl?\n");
}
} else {
ASSERT(!"STTime !! CD_PAUSING Fixup with list items\n"); KeSetEvent(deviceExtension->Thread.Events[EVENT_DIGITAL], IO_NO_INCREMENT, FALSE);
}
} else if (TEST_FLAG(state, CD_PAUSED)) {
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "STTime => Still paused\n"));
} else {
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "STTime !! %x seconds inactivity\n", REDBOOK_THREAD_FIXUP_SECONDS));
if (IsListEmpty(&deviceExtension->Thread.DigitalList)) { ASSERT(!"STTime !! CD_PLAYING Fixup with empty list\n"); } else { ASSERT(!"STTime !! CD_PLAYING Fixup with list items\n"); KeSetEvent(deviceExtension->Thread.Events[EVENT_DIGITAL], IO_NO_INCREMENT, FALSE); }
} break;
}
default: {
if (waitStatus > 0 && waitStatus < EVENT_MAXIMUM) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugError, "[redbook] " "ST !! Unhandled event: %lx\n", waitStatus)); } else { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugError, "[redbook] " "ST !! event too large/small: %lx\n", waitStatus)); }
ASSERT(!"[redbook] ST !! Unhandled event"); break; }
} // end of the huge case statement.
//
// check if ioctl waiting or killed. if so, and state is no longer
// in an intermediate state, set the appropriate event.
// ordered to short-curcuit quickly.
//
{ ULONG state = GetCdromState(deviceExtension);
if (killed && deviceExtension->Thread.PendingRead == 0 && deviceExtension->Thread.PendingStream == 0) {
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "ST => Killing Thread %p\n", deviceExtension->Thread.SelfPointer));
ASSERT(!TEST_FLAG(state, CD_MASK_TEMP));
state = SetCdromState(deviceExtension, state, CD_STOPPED);
KeSetEvent(deviceExtension->Thread.Events[EVENT_KILL_THREAD], IO_NO_INCREMENT, FALSE); } }
continue; } // while(1) loop
ASSERT(!"[redbook] ST !! somehow broke out of while(1) loop?");}
VOIDRedBookReadRaw( PREDBOOK_DEVICE_EXTENSION DeviceExtension, PREDBOOK_COMPLETION_CONTEXT Context )
/*++
Routine Description:
Reads raw audio data off the cdrom. Must either reinsert Context into queue and set an event or set a completion routine which will do so.
Arguments:
DeviceObject - CDROM class driver object or lower level filter
Return Value:
status
--*/{ NTSTATUS status; PIO_STACK_LOCATION nextIrpStack; PRAW_READ_INFO readInfo;
PAGED_CODE(); VerifyCalledByThread(DeviceExtension);
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugDigitalR, "[redbook] " "ReadRaw => Entering\n"));
status = IoAcquireRemoveLock(&DeviceExtension->RemoveLock, Context->Irp);
if (!NT_SUCCESS(status)) {
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugDigitalR, "[redbook] " "ReadRaw !! RemoveLock failed %lx\n", status));
// end of thread loop will check for no outstanding io
// and on too many errors set stopping
// don't forget perf info
Context->TimeReadSent.QuadPart = 0; // special value
Context->Irp->IoStatus.Status = status; Context->Reason = REDBOOK_CC_READ_COMPLETE;
//
// put it on the queue and set the event
//
ExInterlockedInsertTailList(&DeviceExtension->Thread.DigitalList, &Context->ListEntry, &DeviceExtension->Thread.DigitalLock); KeSetEvent(DeviceExtension->Thread.Events[EVENT_DIGITAL], IO_CD_ROM_INCREMENT, FALSE); return; }
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugDigitalR, "[redbook] " "ReadRaw => Index %x sending Irp %p\n", Context->Index, Context->Irp));
//
// (no failure from this point forward)
//
IoReuseIrp(Context->Irp, STATUS_UNSUCCESSFUL);
Context->Irp->MdlAddress = Context->Mdl;
//
// irp is from kernel mode
//
Context->Irp->AssociatedIrp.SystemBuffer = NULL;
//
// fill in the completion context
//
ASSERT(Context->DeviceExtension == DeviceExtension);
//
// setup the irpstack for the raw read
//
nextIrpStack = IoGetNextIrpStackLocation(Context->Irp);
SET_FLAG(nextIrpStack->Flags, SL_OVERRIDE_VERIFY_VOLUME);
nextIrpStack->MajorFunction = IRP_MJ_DEVICE_CONTROL; nextIrpStack->Parameters.DeviceIoControl.IoControlCode = IOCTL_CDROM_RAW_READ; nextIrpStack->Parameters.DeviceIoControl.Type3InputBuffer = Context->Buffer; nextIrpStack->Parameters.DeviceIoControl.InputBufferLength = sizeof(RAW_READ_INFO); nextIrpStack->Parameters.DeviceIoControl.OutputBufferLength = (RAW_SECTOR_SIZE * DeviceExtension->WmiData.SectorsPerRead);
//
// setup the read info (uses same buffer)
//
readInfo = (PRAW_READ_INFO)(Context->Buffer); readInfo->DiskOffset.QuadPart = (ULONGLONG)(DeviceExtension->CDRom.NextToRead)*COOKED_SECTOR_SIZE; readInfo->SectorCount = DeviceExtension->WmiData.SectorsPerRead; readInfo->TrackMode = CDDA;
//
// send it.
//
IoSetCompletionRoutine(Context->Irp, RedBookReadRawCompletion, Context, TRUE, TRUE, TRUE); KeQueryTickCount(&Context->TimeReadSent); IoCallDriver(DeviceExtension->TargetDeviceObject, Context->Irp);
return;}
NTSTATUSRedBookReadRawCompletion( PVOID UnusableParameter, PIRP Irp, PREDBOOK_COMPLETION_CONTEXT Context )/*++
Routine Description:
When a read completes, use zero'd buffer if error occurred. Make buffer available to ks, then set ks event.
Arguments:
DeviceObject - NULL, due to being originator of IRP
Irp - pointer to buffer to send to KS must check error to increment/clear error count
Context - REDBOOK_COMPLETION_CONTEXT
Return Value:
STATUS_MORE_PROCESSING_REQUIRED
--*/{ PREDBOOK_DEVICE_EXTENSION deviceExtension = Context->DeviceExtension;
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugDigitalR, "[redbook] " "ReadRaw => Completed Irp %p\n", Irp));
KeQueryTickCount(&Context->TimeStreamReady); Context->Reason = REDBOOK_CC_READ_COMPLETE;
ExInterlockedInsertTailList(&deviceExtension->Thread.DigitalList, &Context->ListEntry, &deviceExtension->Thread.DigitalLock);
KeSetEvent(deviceExtension->Thread.Events[EVENT_DIGITAL], IO_CD_ROM_INCREMENT, FALSE); //
// safe to release it since we wait for thread termination
//
IoReleaseRemoveLock(&deviceExtension->RemoveLock, Context->Irp);
return STATUS_MORE_PROCESSING_REQUIRED;}
VOIDRedBookStream( PREDBOOK_DEVICE_EXTENSION DeviceExtension, PREDBOOK_COMPLETION_CONTEXT Context )/*++
Routine Description:
Send buffer to KS. Must either reinsert Context into queue and set an event or set a completion routine which will do so.
Arguments:
Context - DeviceExtension
Return Value:
status
--*/{ NTSTATUS status; PIO_STACK_LOCATION nextIrpStack;
PUCHAR buffer; PKSSTREAM_HEADER header;
ULONG bufferSize;
PULONG streamOk;
PAGED_CODE(); VerifyCalledByThread(DeviceExtension);
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugDigitalS, "[redbook] " "Stream => Entering\n"));
bufferSize = DeviceExtension->WmiData.SectorsPerRead * RAW_SECTOR_SIZE;
status = IoAcquireRemoveLock(&DeviceExtension->RemoveLock, Context->Irp);
if (!NT_SUCCESS(status)) {
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugDigitalS, "[redbook] " "Stream !! RemoveLock failed %lx\n", status));
// end of thread loop will check for no outstanding io
// and on too many errors set CD_STOPPING
// don't forget perf info
Context->TimeReadSent.QuadPart = 0; // special value
Context->Irp->IoStatus.Status = status; Context->Reason = REDBOOK_CC_STREAM_COMPLETE;
//
// put it on the queue and set the event
//
ExInterlockedInsertTailList(&DeviceExtension->Thread.DigitalList, &Context->ListEntry, &DeviceExtension->Thread.DigitalLock); KeSetEvent(DeviceExtension->Thread.Events[EVENT_DIGITAL], IO_CD_ROM_INCREMENT, FALSE); return; }
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugDigitalS, "[redbook] " "Stream => Index %x sending Irp %p\n", Context->Index, Context->Irp));
//
// CONSIDER - how does STOPPED occur?
// SUGGEST - out of loop, if no error and none pending, set to STOPPED?
//
//
// (no failure from this point forward)
//
//
// use a zero'd buffer if an error occurred during the read
//
if (NT_SUCCESS(Context->Irp->IoStatus.Status)) { IoReuseIrp(Context->Irp, STATUS_SUCCESS); buffer = Context->Buffer; // good data
Context->Irp->MdlAddress = Context->Mdl; } else { IoReuseIrp(Context->Irp, STATUS_SUCCESS); buffer = DeviceExtension->Buffer.SilentBuffer; // zero'd data
Context->Irp->MdlAddress = DeviceExtension->Buffer.SilentMdl; }
#if DBG
if (RedBookForceSilence) { buffer = DeviceExtension->Buffer.SilentBuffer; // zero'd data
Context->Irp->MdlAddress = DeviceExtension->Buffer.SilentMdl; }#endif // RedBookUseSilence
nextIrpStack = IoGetNextIrpStackLocation(Context->Irp);
//
// get and fill in the context
//
ASSERT(Context->DeviceExtension == DeviceExtension);
//
// setup the irpstack for streaming the buffer
//
nextIrpStack->MajorFunction = IRP_MJ_DEVICE_CONTROL; nextIrpStack->Parameters.DeviceIoControl.IoControlCode = IOCTL_KS_WRITE_STREAM; nextIrpStack->Parameters.DeviceIoControl.OutputBufferLength = sizeof(KSSTREAM_HEADER); nextIrpStack->Parameters.DeviceIoControl.InputBufferLength = sizeof(KSSTREAM_HEADER); nextIrpStack->FileObject = DeviceExtension->Stream.PinFileObject;
Context->Header.FrameExtent = bufferSize; Context->Header.DataUsed = bufferSize; Context->Header.Size = sizeof(KSSTREAM_HEADER); Context->Header.TypeSpecificFlags = 0; Context->Header.Data = buffer; Context->Header.OptionsFlags = 0;
Context->Irp->AssociatedIrp.SystemBuffer = &Context->Header;
#if REDBOOK_PERFORM_STUTTER_CONTROL
#if REDBOOK_WMI_BUFFERS_MIN < 3
#error "The minimum number of buffers must be at least three due to the method used to prevent stuttering"
#endif // REDBOOK_WMI_BUFFERS_MIN < 3
//
// perform my own pausing to prevent stuttering
//
if (DeviceExtension->Thread.PendingStream <= 3 && DeviceExtension->Buffer.Paused == 0) {
//
// only one buffer (or less) was pending play,
// so pause the output to prevent horrible
// stuttering.
// since this is serialized from a thread,
// can set a simple boolean in the extension
//
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugDigitalS, "[redbook] " "Stream => Pausing, few buffers pending\n"));
if (DeviceExtension->Buffer.FirstPause == 0) { RedBookLogError(DeviceExtension, REDBOOK_ERR_INSUFFICIENT_DATA_STREAM_PAUSED, STATUS_SUCCESS ); InterlockedIncrement(&DeviceExtension->WmiPerf.StreamPausedCount); } else { DeviceExtension->Buffer.FirstPause = 0; }
DeviceExtension->Buffer.Paused = 1; SetNextDeviceState(DeviceExtension, KSSTATE_PAUSE);
} else if (DeviceExtension->Buffer.Paused == 1 && DeviceExtension->Thread.PendingStream == DeviceExtension->WmiData.NumberOfBuffers ) {
ULONG i;
//
// are now using the maximum number of buffers,
// all pending stream. this allows smooth play again.
//
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugDigitalS, "[redbook] " "Stream => Resuming, %d buffers pending\n", DeviceExtension->WmiData.NumberOfBuffers)); DeviceExtension->Buffer.Paused = 0;
//
// prevent these statistics from being added.
//
for (i=0;i<DeviceExtension->WmiData.NumberOfBuffers;i++) { (DeviceExtension->Buffer.Contexts + i)->TimeReadSent.QuadPart = 0; }
//
// let the irps go!
//
SetNextDeviceState(DeviceExtension, KSSTATE_RUN);
} // end of stutter prevention
#endif // REDBOOK_PERFORM_STUTTER_CONTROL
//
// get perf counters at last possible second
//
KeQueryTickCount(&Context->TimeStreamSent); IoSetCompletionRoutine(Context->Irp, RedBookStreamCompletion, Context, TRUE, TRUE, TRUE); IoCallDriver(DeviceExtension->Stream.PinDeviceObject, Context->Irp);
return;}
NTSTATUSRedBookStreamCompletion( PVOID UnusableParameter, PIRP Irp, PREDBOOK_COMPLETION_CONTEXT Context )/*++
Routine Description:
Arguments:
DeviceObject - CDROM class driver object or lower level filter
Irp - pointer to buffer to send to KS must check error to increment/clear error count
Context - sector of disk (ordered number)
Return Value:
status
--*/{ PREDBOOK_DEVICE_EXTENSION deviceExtension = Context->DeviceExtension;
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugDigitalS, "[redbook] " "Stream => Completed Irp %p\n", Irp));
KeQueryTickCount(&Context->TimeReadReady); Context->Reason = REDBOOK_CC_STREAM_COMPLETE;
ExInterlockedInsertTailList(&deviceExtension->Thread.DigitalList, &Context->ListEntry, &deviceExtension->Thread.DigitalLock);
KeSetEvent(deviceExtension->Thread.Events[EVENT_DIGITAL], IO_CD_ROM_INCREMENT, FALSE);
//
// safe to release it since we wait for thread termination
//
IoReleaseRemoveLock(&deviceExtension->RemoveLock, Context->Irp);
return STATUS_MORE_PROCESSING_REQUIRED;}
#if DBG
VOIDValidateCdromState(ULONG State){ ULONG temp;
if (State == 0) { ASSERT(!"Invalid Cdrom State"); } else if (TEST_FLAG(State, ~CD_MASK_ALL)) { ASSERT(!"Invalid Cdrom State"); }
temp = State & CD_MASK_TEMP; if (temp & (temp - 1)) { // see if zero or one bits are set
ASSERT(!"Invalid Cdrom State"); }
temp = State & CD_MASK_STATE; if (temp == 0) { // dis-allow zero bits for STATE
ASSERT(!"Invalid Cdrom State"); } else if (temp & (temp - 1)) { // see if zero or one bits are set
ASSERT(!"Invalid Cdrom State"); }
return;}
#else
VOID ValidateCdromState(ULONG State) {return;}#endif
ULONGGetCdromState( PREDBOOK_DEVICE_EXTENSION DeviceExtension ){ //
// this routine may be called by anyone, whether in the thread's
// context or not. setting the state is restricted, however.
//
ULONG state; state = InterlockedCompareExchange(&DeviceExtension->CDRom.StateNow,0,0); ValidateCdromState(state); return state;}
LONGSetCdromState( IN PREDBOOK_DEVICE_EXTENSION DeviceExtension, IN LONG ExpectedOldState, IN LONG NewState ){ LONG trueOldState;
PAGED_CODE(); VerifyCalledByThread(DeviceExtension);
// ensure when set to: also setting:
// CD_PAUSING CD_PLAYING
// CD_STOPPING CD_PLAYING
if (TEST_FLAG(NewState, CD_PAUSING)) { SET_FLAG(NewState, CD_PLAYING); }
if (TEST_FLAG(NewState, CD_STOPPING)) { SET_FLAG(NewState, CD_PLAYING); }
ValidateCdromState(ExpectedOldState); ValidateCdromState(NewState);
//attempt to change it
trueOldState = InterlockedCompareExchange( &DeviceExtension->CDRom.StateNow, NewState, ExpectedOldState );
ASSERTMSG("State set outside of thread", trueOldState == ExpectedOldState);
//
// see if an event should be fired, volume set, and/or
// stream state set
//
if (ExpectedOldState == NewState) {
//
// if state is not changing, don't do anything
//
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "Setting state to same as expected?! %x == %x\n", ExpectedOldState, NewState));
} else if (TEST_FLAG(ExpectedOldState, CD_MASK_TEMP)) {
//
// should not go from temp state to temp state
//
ASSERT(!TEST_FLAG(NewState, CD_MASK_TEMP));
//
// ioctl is being processed, and state is no longer
// in a temp state, so should process the ioctl again
//
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "SetState => EVENT_COMPLETE should be set soon " "for %p\n", DeviceExtension->Thread.IoctlCurrent));
} else if (TEST_FLAG(NewState, CD_MASK_TEMP)) {
//
// going to either pausing or stopping, both of which must
// be specially handled by stopping the KS stream also.
//
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "SetState => %s, setting device state " "to KSSTATE_STOP\n", (TEST_FLAG(NewState, CD_STOPPING) ? "STOP" : "PAUSE")));
SetNextDeviceState(DeviceExtension, KSSTATE_STOP);
} else if (TEST_FLAG(NewState, CD_PAUSED)) {
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "SetState => Finishing a PAUSE operation\n"));
} else if (TEST_FLAG(NewState, CD_PLAYING)) {
ULONG i; PREDBOOK_COMPLETION_CONTEXT context;
ASSERT(NewState == CD_PLAYING);
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "SetState => Starting a PLAY operation\n"));
//
// not same state, not from temp state,
// so must either be paused or stopped.
//
ASSERT(TEST_FLAG(ExpectedOldState,CD_STOPPED) || TEST_FLAG(ExpectedOldState,CD_PAUSED));
//
// set some deviceextension stuff
//
RtlZeroMemory(&DeviceExtension->WmiPerf, sizeof(REDBOOK_WMI_PERF_DATA)); DeviceExtension->CDRom.ReadErrors = 0; DeviceExtension->CDRom.StreamErrors = 0; DeviceExtension->Buffer.Paused = 0; DeviceExtension->Buffer.FirstPause = 1; DeviceExtension->Buffer.IndexToRead = 0; DeviceExtension->Buffer.IndexToStream = 0;
//
// reset the buffer state
//
ASSERT(DeviceExtension->Buffer.Contexts); context = DeviceExtension->Buffer.Contexts;
for (i=0; i<DeviceExtension->WmiData.NumberOfBuffers;i++) {
*(DeviceExtension->Buffer.ReadOk_X + i) = 0; *(DeviceExtension->Buffer.StreamOk_X + i) = 0;
context->Reason = REDBOOK_CC_READ; context->Irp->IoStatus.Status = STATUS_SUCCESS;
ExInterlockedInsertTailList(&DeviceExtension->Thread.DigitalList, &context->ListEntry, &DeviceExtension->Thread.DigitalLock);
context++; // pointer arithmetic
} context = NULL;
//
// start the digital playback
//
SetNextDeviceState(DeviceExtension, KSSTATE_RUN); RedBookKsSetVolume(DeviceExtension); KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "SetState => Setting DIGITAL event\n")); KeSetEvent(DeviceExtension->Thread.Events[EVENT_DIGITAL], IO_CD_ROM_INCREMENT, FALSE);
} else {
//
// ReadQ Channel or some such nonsense
//
}
return GetCdromState(DeviceExtension);}
VOIDRedBookDeallocatePlayResources( PREDBOOK_DEVICE_EXTENSION DeviceExtension ){ PREDBOOK_COMPLETION_CONTEXT context; ULONG i; BOOLEAN freedSomething = FALSE;
PAGED_CODE(); VerifyCalledByThread(DeviceExtension);#if DBG
{ ULONG state = GetCdromState(DeviceExtension); ASSERT(!TEST_FLAG(state, CD_PLAYING) && !TEST_FLAG(state, CD_PAUSED)); }#endif
//
// free all resources
//
if (DeviceExtension->Buffer.StreamOk_X) { freedSomething = TRUE; ExFreePool(DeviceExtension->Buffer.StreamOk_X); DeviceExtension->Buffer.StreamOk_X = NULL; }
if (DeviceExtension->Buffer.ReadOk_X) { freedSomething = TRUE; ExFreePool(DeviceExtension->Buffer.ReadOk_X); DeviceExtension->Buffer.ReadOk_X = NULL; }
if (DeviceExtension->Buffer.Contexts) {
context = DeviceExtension->Buffer.Contexts; for (i=0;i<DeviceExtension->WmiData.NumberOfBuffers;i++) { if (context->Irp) { IoFreeIrp(context->Irp); } if (context->Mdl) { IoFreeMdl(context->Mdl); } context++; // pointer arithmetic
} context = NULL;
freedSomething = TRUE; ExFreePool(DeviceExtension->Buffer.Contexts); DeviceExtension->Buffer.Contexts = NULL; }
if (DeviceExtension->Buffer.SilentMdl) { freedSomething = TRUE; IoFreeMdl(DeviceExtension->Buffer.SilentMdl); DeviceExtension->Buffer.SilentMdl = NULL; }
if (DeviceExtension->Buffer.SkipBuffer) { freedSomething = TRUE; ExFreePool(DeviceExtension->Buffer.SkipBuffer); DeviceExtension->Buffer.SkipBuffer = NULL; }
if (DeviceExtension->Thread.CheckVerifyIrp) { PIRP irp = DeviceExtension->Thread.CheckVerifyIrp; freedSomething = TRUE; if (irp->MdlAddress) { IoFreeMdl(irp->MdlAddress); } if (irp->AssociatedIrp.SystemBuffer) { ExFreePool(irp->AssociatedIrp.SystemBuffer); }
IoFreeIrp(DeviceExtension->Thread.CheckVerifyIrp); DeviceExtension->Thread.CheckVerifyIrp = NULL; }
if (DeviceExtension->Stream.PinFileObject) { freedSomething = TRUE; CloseSysAudio(DeviceExtension); }
if (DeviceExtension->CDRom.Toc) { freedSomething = TRUE; ExFreePool(DeviceExtension->CDRom.Toc); DeviceExtension->CDRom.Toc = NULL; }
if (freedSomething) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugAllocPlay, "[redbook] " "DeallocatePlay => Deallocated play resources\n")); }
return;} BOOLEANRedBookArePlayResourcesAllocated( PREDBOOK_DEVICE_EXTENSION DeviceExtension )//
// just choose one, since it's all done in a batch in
// one thread context it's always safe.
//
{ PAGED_CODE(); VerifyCalledByThread(DeviceExtension); return (DeviceExtension->Stream.PinFileObject != NULL);}
NTSTATUSRedBookAllocatePlayResources( PREDBOOK_DEVICE_EXTENSION DeviceExtension )//
// allocate resources if they are not already allocated
//
{ PREDBOOK_COMPLETION_CONTEXT context; NTSTATUS status; KEVENT event; ULONG numBufs; ULONG numSectors; ULONG bufSize; ULONG i; CCHAR maxStack; BOOLEAN sysAudioOpened = FALSE;
PAGED_CODE(); VerifyCalledByThread(DeviceExtension);
//
// NOTE:
// The call to update the mixer Id may de-allocate all play
// resources, since the stack sizes may change. it must
// therefore be the first call within this routine.
//
if (DeviceExtension->Stream.MixerPinId == -1) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugAllocPlay, "[redbook] " "AllocatePlay => No mixer set?\n")); return STATUS_UNSUCCESSFUL; }
if (DeviceExtension->Buffer.Contexts != NULL) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugAllocPlay, "[redbook] " "AllocatePlay => Using existing resources\n")); return STATUS_SUCCESS; }
#if DBG
{ ULONG state = GetCdromState(DeviceExtension); ASSERT(!TEST_FLAG(state, CD_PLAYING) && !TEST_FLAG(state, CD_PAUSED)); }#endif
ASSERT(DeviceExtension->Buffer.Contexts == NULL); ASSERT(DeviceExtension->Buffer.SkipBuffer == NULL);
numBufs = DeviceExtension->WmiData.NumberOfBuffers; numSectors = DeviceExtension->WmiData.SectorsPerRead; bufSize = RAW_SECTOR_SIZE * numSectors;
TRY {
ASSERT(DeviceExtension->Stream.MixerPinId != -1);
//
// may need to allocate the CheckVerifyIrp
//
{ PIO_STACK_LOCATION irpStack; PIRP irp; irp = DeviceExtension->Thread.CheckVerifyIrp;
if (irp == NULL) { irp = IoAllocateIrp( (CCHAR)(DeviceExtension->SelfDeviceObject->StackSize+1), FALSE); } if (irp == NULL) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugAllocPlay, "[redbook] " "AllocatePlay => No CheckVerifyIrp\n")); status = STATUS_NO_MEMORY; LEAVE; }
irp->AssociatedIrp.SystemBuffer = irp->MdlAddress = NULL;
irp->AssociatedIrp.SystemBuffer = ExAllocatePoolWithTag(NonPagedPoolCacheAligned, sizeof(ULONG), TAG_CV_BUFFER); if (irp->AssociatedIrp.SystemBuffer == NULL) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugAllocPlay, "[redbook] " "AllocatePlay => No CheckVerify Buffer\n")); status = STATUS_NO_MEMORY; LEAVE; }
irp->MdlAddress = IoAllocateMdl(irp->AssociatedIrp.SystemBuffer, sizeof(ULONG), FALSE, FALSE, NULL); if (irp->MdlAddress == NULL) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugAllocPlay, "[redbook] " "AllocatePlay => No CheckVerify Mdl\n")); status = STATUS_NO_MEMORY; LEAVE; }
MmBuildMdlForNonPagedPool(irp->MdlAddress);
IoSetNextIrpStackLocation(irp); irpStack = IoGetCurrentIrpStackLocation(irp);
irpStack->MajorFunction = IRP_MJ_DEVICE_CONTROL;
irpStack->Parameters.DeviceIoControl.InputBufferLength = 0; irpStack->Parameters.DeviceIoControl.OutputBufferLength = sizeof(ULONG); irpStack->Parameters.DeviceIoControl.IoControlCode = IOCTL_CDROM_CHECK_VERIFY;
DeviceExtension->Thread.CheckVerifyIrp = irp; }
//
// connect to sysaudio
//
{ KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugAllocPlay, "[redbook] " "AllocatePlay => Preparing to open sysaudio\n"));
ASSERT(DeviceExtension->Stream.MixerPinId != MAXULONG);
status = OpenSysAudio(DeviceExtension);
if ( !NT_SUCCESS(status) ) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugWarning, "[redbook] " "AllocatePlay !! Unable to open sysaudio %lx\n", status)); LEAVE; }
// else the pin is open
sysAudioOpened = TRUE; }
maxStack = MAX(DeviceExtension->TargetDeviceObject->StackSize, DeviceExtension->Stream.PinDeviceObject->StackSize); DeviceExtension->Buffer.MaxIrpStack = maxStack;
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugAllocPlay, "[redbook] " "AllocateePlay => Stacks: Cdrom %x Stream %x\n", DeviceExtension->TargetDeviceObject->StackSize, DeviceExtension->Stream.PinDeviceObject->StackSize)); KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugAllocPlay, "[redbook] " "AllocateePlay => Allocating %x stacks per irp\n", maxStack));
DeviceExtension->Buffer.SkipBuffer = ExAllocatePoolWithTag(NonPagedPoolCacheAligned, bufSize * (numBufs + 1), TAG_BUFFER);
if (DeviceExtension->Buffer.SkipBuffer == NULL) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugAllocPlay, "[redbook] " "AllocatePlay => No Skipbuffer\n")); status = STATUS_NO_MEMORY; LEAVE; } RtlZeroMemory(DeviceExtension->Buffer.SkipBuffer, bufSize * (numBufs + 1));
DeviceExtension->Buffer.Contexts = ExAllocatePoolWithTag(NonPagedPool, sizeof(REDBOOK_COMPLETION_CONTEXT) * numBufs, TAG_CC);
if (DeviceExtension->Buffer.Contexts == NULL) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugAllocPlay, "[redbook] " "AllocatePlay => No Contexts\n")); status = STATUS_NO_MEMORY; LEAVE; }
RtlZeroMemory(DeviceExtension->Buffer.Contexts, sizeof(REDBOOK_COMPLETION_CONTEXT) * numBufs);
context = DeviceExtension->Buffer.Contexts; for (i=0;i<numBufs;i++) {
context->DeviceExtension = DeviceExtension; context->Reason = REDBOOK_CC_READ; context->Index = i; context->Buffer = DeviceExtension->Buffer.SkipBuffer + (bufSize * i); // pointer arithmetic of UCHARS
//
// allocate irp, mdl
//
context->Irp = IoAllocateIrp(maxStack, FALSE); context->Mdl = IoAllocateMdl(context->Buffer, bufSize, FALSE, FALSE, NULL); if (context->Irp == NULL || context->Mdl == NULL) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugAllocPlay, "[redbook] " "AllocatePlay => Irp/Mdl %x failed\n", i)); status = STATUS_NO_MEMORY; LEAVE; }
MmBuildMdlForNonPagedPool(context->Mdl);
context++; // pointer arithmetic of CONTEXTS
} context = NULL; // safety
//
// allocated above as part of SkipBuffer
//
DeviceExtension->Buffer.SilentBuffer = DeviceExtension->Buffer.SkipBuffer + (bufSize * numBufs);
DeviceExtension->Buffer.SilentMdl = IoAllocateMdl(DeviceExtension->Buffer.SkipBuffer, bufSize, FALSE, FALSE, NULL); if (DeviceExtension->Buffer.SilentMdl == NULL) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugAllocPlay, "[redbook] " "AllocatePlay => Silent Mdl failed\n")); status = STATUS_NO_MEMORY; LEAVE; }
DeviceExtension->Buffer.ReadOk_X = ExAllocatePoolWithTag(NonPagedPoolCacheAligned, sizeof(ULONG) * numBufs, TAG_READX); if (DeviceExtension->Buffer.ReadOk_X == NULL) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugAllocPlay, "[redbook] " "AllocatePlay => ReadOk_X failed\n")); status = STATUS_NO_MEMORY; LEAVE; } RtlZeroMemory(DeviceExtension->Buffer.ReadOk_X, sizeof(ULONG) * numBufs);
DeviceExtension->Buffer.StreamOk_X = ExAllocatePoolWithTag(NonPagedPoolCacheAligned, sizeof(ULONG) * numBufs, TAG_STREAMX); if (DeviceExtension->Buffer.StreamOk_X == NULL) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugAllocPlay, "[redbook] " "AllocatePlay => ReadOk_X failed\n")); status = STATUS_NO_MEMORY; LEAVE; } RtlZeroMemory(DeviceExtension->Buffer.StreamOk_X, sizeof(ULONG) * numBufs);
MmBuildMdlForNonPagedPool(DeviceExtension->Buffer.SilentMdl);
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugAllocPlay, "[redbook] " "AllocatePlay => Allocated All Resources\n"));
status = STATUS_SUCCESS;
} FINALLY {
if (!NT_SUCCESS(status)) {
RedBookDeallocatePlayResources(DeviceExtension); return status; } }
//
// else all resources allocated
//
return STATUS_SUCCESS;
}
NTSTATUSRedBookCacheToc( PREDBOOK_DEVICE_EXTENSION DeviceExtension ){ PCDROM_TOC newToc; PIRP irp; ULONG mediaChangeCount; IO_STATUS_BLOCK ioStatus; KEVENT event; NTSTATUS status;
PAGED_CODE(); VerifyCalledByThread(DeviceExtension);
//
// cache the number of times the media has changed
// use this to prevent redundant reads of the toc
// and to return Q channel info during playback
//
KeInitializeEvent(&event, SynchronizationEvent, FALSE);
//
// first get the mediaChangeCount to see if we've already
// cached this toc
//
irp = IoBuildDeviceIoControlRequest(IOCTL_CDROM_CHECK_VERIFY, DeviceExtension->TargetDeviceObject, NULL, 0, &mediaChangeCount, sizeof(ULONG), FALSE, &event, &ioStatus); if (irp == NULL) { return STATUS_NO_MEMORY; }
SET_FLAG(IoGetNextIrpStackLocation(irp)->Flags, SL_OVERRIDE_VERIFY_VOLUME);
status = IoCallDriver(DeviceExtension->TargetDeviceObject, irp);
if (status == STATUS_PENDING) { KeWaitForSingleObject(&event, Executive, KernelMode, FALSE, NULL); status = ioStatus.Status; }
if (!NT_SUCCESS(status)) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugAllocPlay, "[redbook] " "CacheToc !! CheckVerify failed %lx\n", status)); return status; }
//
// read TOC only we don't have the correct copy cached
//
if (DeviceExtension->CDRom.Toc != NULL && DeviceExtension->CDRom.CheckVerify == mediaChangeCount) {
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugAllocPlay, "[redbook] " "CacheToc => Using cached toc\n")); return STATUS_SUCCESS;
}
//
// Allocate for the cached TOC
//
newToc = ExAllocatePoolWithTag(NonPagedPoolCacheAligned, sizeof(CDROM_TOC), TAG_TOC);
if (newToc == NULL) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugAllocPlay, "[redbook] " "CacheToc !! Unable to allocate new TOC\n")); return STATUS_NO_MEMORY; }
KeClearEvent(&event);
irp = IoBuildDeviceIoControlRequest(IOCTL_CDROM_READ_TOC, DeviceExtension->TargetDeviceObject, NULL, 0, newToc, sizeof(CDROM_TOC), FALSE, &event, &ioStatus); if (irp == NULL) { ExFreePool(newToc); newToc = NULL; return STATUS_NO_MEMORY; }
SET_FLAG(IoGetNextIrpStackLocation(irp)->Flags, SL_OVERRIDE_VERIFY_VOLUME);
status = IoCallDriver(DeviceExtension->TargetDeviceObject, irp); if (status == STATUS_PENDING) { KeWaitForSingleObject(&event, Executive, KernelMode, FALSE, NULL); status = ioStatus.Status; }
//
// set the new toc, or if error free it
// return the status
//
if (!NT_SUCCESS(status)) {
ExFreePool(newToc); newToc = NULL; KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugAllocPlay, "[redbook] " "CacheToc !! Failed to get TOC %lx\n", status));
} else {
if (DeviceExtension->CDRom.Toc) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugAllocPlay, "[redbook] " "CacheToc => Freeing old toc %p\n", DeviceExtension->CDRom.Toc)); ExFreePool(DeviceExtension->CDRom.Toc); } DeviceExtension->CDRom.Toc = newToc; DeviceExtension->CDRom.CheckVerify = mediaChangeCount;
} return status;}
VOIDRedBookThreadDigitalHandler( IN PREDBOOK_DEVICE_EXTENSION DeviceExtension, IN PLIST_ENTRY ListEntry )//
// DECREMENT StreamPending/ReadPending if it's a completion
// SET stopped, error, etc. states
// INCREMENT StreamPending/ReadPending if it's to be sent again
//
{ PREDBOOK_COMPLETION_CONTEXT Context; ULONG index; ULONG mod; ULONG state;
PAGED_CODE(); VerifyCalledByThread(DeviceExtension); ASSERT(DeviceExtension->WmiData.NumberOfBuffers); ASSERT(DeviceExtension->Buffer.SkipBuffer);
//
// Increment/Decrement PendingRead/PendingStream
//
Context = CONTAINING_RECORD(ListEntry, REDBOOK_COMPLETION_CONTEXT, ListEntry);
index = Context->Index; mod = DeviceExtension->WmiData.NumberOfBuffers;
state = GetCdromState(DeviceExtension);
//
// decrement the number reading/streaming if needed
//
if (Context->Reason == REDBOOK_CC_READ_COMPLETE) {
if (!NT_SUCCESS(Context->Irp->IoStatus.Status)) {
if (IoIsErrorUserInduced(Context->Irp->IoStatus.Status)) {
DeviceExtension->CDRom.ReadErrors = REDBOOK_MAX_CONSECUTIVE_ERRORS;
} else {
DeviceExtension->CDRom.ReadErrors++; }
} else { DeviceExtension->CDRom.ReadErrors = 0; }
DeviceExtension->Thread.PendingRead--; Context->Reason = REDBOOK_CC_STREAM;
} else if (Context->Reason == REDBOOK_CC_STREAM_COMPLETE) {
if (!NT_SUCCESS(Context->Irp->IoStatus.Status)) { DeviceExtension->CDRom.StreamErrors++; } else { DeviceExtension->CDRom.StreamErrors = 0; }
//
// if stream succeeded OR we are _NOT_ stopping audio,
// increment FinishedStreaming and save wmi stats
//
if (NT_SUCCESS(Context->Irp->IoStatus.Status) || !TEST_FLAG(state, CD_MASK_TEMP)) {
DeviceExtension->CDRom.FinishedStreaming += DeviceExtension->WmiData.SectorsPerRead;
AddWmiStats(DeviceExtension, Context);
}
DeviceExtension->Thread.PendingStream--; Context->Reason = REDBOOK_CC_READ;
}
if (DeviceExtension->CDRom.StreamErrors >= REDBOOK_MAX_CONSECUTIVE_ERRORS && !TEST_FLAG(state, CD_MASK_TEMP)) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "Digital => Too many stream errors, beginning STOP\n")); ASSERT(!TEST_FLAG(state, CD_STOPPED)); ASSERT(!TEST_FLAG(state, CD_PAUSED)); state = SetCdromState(DeviceExtension, state, CD_STOPPING); }
if (DeviceExtension->CDRom.ReadErrors >= REDBOOK_MAX_CONSECUTIVE_ERRORS && !TEST_FLAG(state, CD_MASK_TEMP)) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "Digital => Too many read errors, beginning STOP\n"));
state = SetCdromState(DeviceExtension, state, CD_STOPPING); }
//
// if stopping/pausing/etc, and no reads/streams are pending,
// set the new state and return.
// the while() loop in the thread will do the right thing
// when there is no more outstanding io--it will call the ioctl
// completion handler to do whatever post-processing is needed.
//
if (TEST_FLAG(state, CD_MASK_TEMP)) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "Digital => Temp state %x, not continuing (%d, %d)\n", state, DeviceExtension->Thread.PendingRead, DeviceExtension->Thread.PendingStream ));
if (DeviceExtension->Thread.PendingRead == 0 && DeviceExtension->Thread.PendingStream == 0) {
//
// Set NextToRead and NextToStream to FinishedStreaming
//
DeviceExtension->CDRom.NextToRead = DeviceExtension->CDRom.NextToStream = DeviceExtension->CDRom.FinishedStreaming;
if (TEST_FLAG(state, CD_PAUSING)) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "Digital => completing PAUSED\n")); state = SetCdromState(DeviceExtension, state, CD_PAUSED); } else if (TEST_FLAG(state, CD_STOPPING)) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "Digital => completing STOPPED\n")); state = SetCdromState(DeviceExtension, state, CD_STOPPED); } else { ASSERT(!"Unknown state?"); }
if (DeviceExtension->Thread.IoctlCurrent) { KeSetEvent(DeviceExtension->Thread.Events[EVENT_COMPLETE], IO_CD_ROM_INCREMENT, FALSE); } } return; }
if (DeviceExtension->CDRom.NextToRead >= DeviceExtension->CDRom.EndPlay && Context->Reason == REDBOOK_CC_READ) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "Digital => End play, ignoring READ\n")); if (DeviceExtension->Thread.PendingRead == 0 && DeviceExtension->Thread.PendingStream == 0) {
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "Digital => All IO done, setting STOPPED\n")); state = SetCdromState(DeviceExtension, state, CD_STOPPED); } return; }
if (DeviceExtension->CDRom.NextToStream >= DeviceExtension->CDRom.EndPlay && Context->Reason == REDBOOK_CC_STREAM) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "Digital => End play, ignoring STREAM\n")); if (DeviceExtension->Thread.PendingRead == 0 && DeviceExtension->Thread.PendingStream == 0) {
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "Digital => All IO done, setting STOPPED\n")); state = SetCdromState(DeviceExtension, state, CD_STOPPED);
} return; }
switch(Context->Reason) {
case REDBOOK_CC_READ: {
// mark this buffer as off the queue/usable
ASSERT(DeviceExtension->Buffer.ReadOk_X[index] == 0); DeviceExtension->Buffer.ReadOk_X[index] = 1;
if (index != DeviceExtension->Buffer.IndexToRead) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "Digital => Delaying read, index %x\n", index)); return; }
if (DeviceExtension->CDRom.NextToRead > DeviceExtension->CDRom.EndPlay) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "Digital => End of Play\n")); return; }
for (index = Context->Index; DeviceExtension->Buffer.ReadOk_X[index] != 0; index = (index + 1) % mod) {
// mark this buffer as in use BEFORE attempting to read
DeviceExtension->Buffer.ReadOk_X[index] = 0; DeviceExtension->Thread.PendingRead++;
RedBookReadRaw(DeviceExtension, &DeviceExtension->Buffer.Contexts[index]);
// increment where reading from AFTER attempting to read
DeviceExtension->CDRom.NextToRead += DeviceExtension->WmiData.SectorsPerRead;
// inc/mod the index AFTER attempting to read
DeviceExtension->Buffer.IndexToRead++; DeviceExtension->Buffer.IndexToRead %= mod; }
break; }
case REDBOOK_CC_STREAM: {
// mark this buffer as off the queue/usable
ASSERT(DeviceExtension->Buffer.StreamOk_X[index] == 0); DeviceExtension->Buffer.StreamOk_X[index] = 1;
if (index != DeviceExtension->Buffer.IndexToStream) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugThread, "[redbook] " "Delaying stream of index %x\n", index)); return; }
for (index = Context->Index; DeviceExtension->Buffer.StreamOk_X[index] != 0; index = (index + 1) % mod) {
// mark this buffer as in use BEFORE attempting to read
DeviceExtension->Buffer.StreamOk_X[index] = 0; DeviceExtension->Thread.PendingStream++;
RedBookStream(DeviceExtension, &DeviceExtension->Buffer.Contexts[index]);
// increment where reading from AFTER attempting to read
DeviceExtension->CDRom.NextToStream += DeviceExtension->WmiData.SectorsPerRead;
// inc/mod the index AFTER attempting to read
DeviceExtension->Buffer.IndexToStream++; DeviceExtension->Buffer.IndexToStream %= mod; }
break; }
default: { ASSERT(!"Unhandled Context->Reason\n"); break; }
} // end switch (Context->Reason)
return;}
VOIDAddWmiStats( PREDBOOK_DEVICE_EXTENSION DeviceExtension, PREDBOOK_COMPLETION_CONTEXT Context ){ KIRQL oldIrql; ULONG timeIncrement;
if (Context->TimeReadSent.QuadPart == 0) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugWmi, "[redbook] " "Not Saving WMI Stats for REASON:\n")); KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugWmi, "[redbook] " "(ReadError, StreamError, Paused?)\n")); return; }
timeIncrement = KeQueryTimeIncrement(); // amount of time for each tick
KeAcquireSpinLock(&DeviceExtension->WmiPerfLock, &oldIrql);
DeviceExtension->WmiPerf.TimeReadDelay += (Context->TimeReadSent.QuadPart - Context->TimeReadReady.QuadPart ) * timeIncrement; DeviceExtension->WmiPerf.TimeReading += (Context->TimeStreamReady.QuadPart - Context->TimeReadSent.QuadPart ) * timeIncrement; DeviceExtension->WmiPerf.TimeStreamDelay += (Context->TimeStreamSent.QuadPart - Context->TimeStreamReady.QuadPart ) * timeIncrement; DeviceExtension->WmiPerf.TimeStreaming += (Context->TimeReadReady.QuadPart - Context->TimeStreamSent.QuadPart ) * timeIncrement;
DeviceExtension->WmiPerf.DataProcessed += DeviceExtension->WmiData.SectorsPerRead * RAW_SECTOR_SIZE;
KeReleaseSpinLock( &DeviceExtension->WmiPerfLock, oldIrql ); return;}////////////////////////////////////////////////////////////////////////////////
VOIDRedBookCheckForAudioDeviceRemoval( PREDBOOK_DEVICE_EXTENSION DeviceExtension ){ ULONG state = GetCdromState(DeviceExtension);
PAGED_CODE(); VerifyCalledByThread(DeviceExtension);
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugSysaudio, "[redbook] " "STCheckForRemoval => Checking if audio device changed\n"));
if (TEST_FLAG(state, CD_MASK_TEMP)) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugSysaudio, "[redbook] " "STCheckForRemoval => delaying -- temp state\n")); return; }
if (DeviceExtension->Stream.UpdateMixerPin == 0) { return; }
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugSysaudio, "[redbook] " "STCheckForRemoval => Audio Device may have changed\n"));
if (TEST_FLAG(state, CD_PLAYING)) { KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugSysaudio, "[redbook] " "STCheckForRemoval => playing, so stopping\n")); state = SetCdromState(DeviceExtension, state, CD_STOPPING); return; }
if (TEST_FLAG(state, CD_STOPPED)) {
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugSysaudio, "[redbook] " "STCheckForRemoval => stopped, updating\n"));
} else if (TEST_FLAG(state, CD_PAUSED)) {
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugSysaudio, "[redbook] " "STCheckForRemoval => paused, updating\n")); //
// ISSUE-2000/5/24-henrygab - may not need to stop
// unless mixer becomes -1,
// since we could then send
// to the new audio device.
//
state = SetCdromState(DeviceExtension, state, CD_STOPPED);
}
ASSERT(TEST_FLAG(GetCdromState(DeviceExtension), CD_STOPPED));
//
// set the value to zero (iff the value was one)
// check if the value was one, and if so, update the mixerpin
//
if (InterlockedCompareExchange(&DeviceExtension->Stream.UpdateMixerPin, 0, 1) == 1) {
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugSysaudio, "[redbook] " "STCheckForRemoval => Updating MixerPin\n"));
//
// free any in-use play resources
//
RedBookDeallocatePlayResources(DeviceExtension);
if (DeviceExtension->Stream.MixerPinId != -1) { UninitializeVirtualSource(DeviceExtension); }
InitializeVirtualSource(DeviceExtension);
if (DeviceExtension->Stream.MixerPinId == -1) {
KdPrintEx((DPFLTR_REDBOOK_ID, RedbookDebugSysaudio, "[redbook] " "STCheckForRemoval => Update of mixerpin " "failed -- will retry later\n")); InterlockedExchange(&DeviceExtension->Stream.UpdateMixerPin, 1); return; } }
return;}
|
