420 lines
10 KiB
C++
420 lines
10 KiB
C++
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/******************************Module*Header*******************************\
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* Module Name: scan.c
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*
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* Code for scanning the available CD Rom devices.
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*
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*
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* Created: 02-11-93
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* Author: Stephen Estrop [StephenE]
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*
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* Copyright (c) 1993 Microsoft Corporation
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\**************************************************************************/
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#pragma warning( once : 4201 4214 )
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#define NOOLE
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#include <windows.h> /* required for all Windows applications */
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#include <windowsx.h>
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#include <string.h>
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#include <tchar.h> /* contains portable ascii/unicode macros */
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#include "playres.h"
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#include "cdplayer.h"
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#include "cdapi.h"
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#include "scan.h"
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#include "trklst.h"
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#include "database.h"
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/*****************************Private*Routine******************************\
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* ScanForCdromDevices
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*
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* Returns the number of CD-ROM devices installed in the system.
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*
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* History:
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* 18-11-93 - StephenE - Created
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*
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\**************************************************************************/
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int
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ScanForCdromDevices(
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void
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)
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{
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DWORD dwDrives;
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TCHAR chDrive[] = TEXT("A:\\");
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int iNumDrives;
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iNumDrives = 0;
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for (dwDrives = GetLogicalDrives(); dwDrives != 0; dwDrives >>= 1 ) {
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/*
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** Is there a logical drive ??
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*/
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if (dwDrives & 1) {
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if ( GetDriveType(chDrive) == DRIVE_CDROM ) {
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g_Devices[iNumDrives] = (CDROM*)AllocMemory( sizeof(CDROM) );
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g_Devices[iNumDrives]->drive = chDrive[0];
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g_Devices[iNumDrives]->State = CD_BEING_SCANNED;
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iNumDrives++;
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}
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}
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/*
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** Go look at the next drive
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*/
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chDrive[0] = chDrive[0] + 1;
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}
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return iNumDrives;
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}
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/******************************Public*Routine******************************\
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* RescanDevice
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*
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*
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* This routine is called to scan the disc in a given cdrom by
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* reading its table of contents. If the cdrom is playing the user is
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* notified that the music will stop.
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*
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* History:
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* 18-11-93 - StephenE - Created
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*
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\**************************************************************************/
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void RescanDevice(
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HWND hwndNotify,
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int cdrom
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)
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{
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TOC_THREAD_PARMS *ptoc;
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HWND hwndButton;
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int iMsgBoxRtn;
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if ( g_Devices[cdrom]->State & CD_PLAYING ) {
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TCHAR s1[256];
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TCHAR s2[256];
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_tcscpy( s1, IdStr( STR_CANCEL_PLAY ) );
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_tcscpy( s2, IdStr( STR_RESCAN ) );
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iMsgBoxRtn = MessageBox( g_hwndApp, s1, s2,
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MB_APPLMODAL | MB_DEFBUTTON1 |
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MB_ICONQUESTION | MB_YESNO);
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if ( iMsgBoxRtn == IDYES ) {
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hwndButton = g_hwndControls[INDEX(IDM_PLAYBAR_STOP)];
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SendMessage( hwndButton, WM_LBUTTONDOWN, 0, 0L );
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SendMessage( hwndButton, WM_LBUTTONUP, 0, 0L );
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}
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else {
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return;
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}
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}
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/*
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** Attempt to read table of contents of disc in this drive. We
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** now spawn off a separate thread to do this. Note that the child
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** thread frees the storage allocated below.
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*/
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ptoc = (TOC_THREAD_PARMS*)AllocMemory( sizeof(TOC_THREAD_PARMS) );
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ptoc->hwndNotify = hwndNotify;
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ptoc->cdrom = cdrom;
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ReadTableOfContents( ptoc );
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}
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/*****************************Private*Routine******************************\
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* ReadTableofContents
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*
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* This function reads in the table of contents (TOC) for the specified cdrom.
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* All TOC's are read on a worker thread. The hi-word of thread_info variable
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* is a boolean that states if the display should been updated after the TOC
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* has been reads. The lo-word of thread_info is the id of the cdrom device
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* to be read.
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*
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* History:
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* 18-11-93 - StephenE - Created
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*
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\**************************************************************************/
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void
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ReadTableOfContents(
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TOC_THREAD_PARMS *ptoc
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)
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{
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DWORD dwThreadId;
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int cdrom;
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cdrom = ptoc->cdrom;
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g_Devices[ cdrom ]->fIsTocValid = FALSE;
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g_Devices[cdrom]->fShowLeadIn = FALSE;
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g_Devices[cdrom]->fProcessingLeadIn = FALSE;
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if (g_Devices[ cdrom ]->hThreadToc != NULL) {
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/*
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** We have a thread TOC handle see if the thread is
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** still running. If so just return, otherwise
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*/
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switch ( WaitForSingleObject(g_Devices[ cdrom ]->hThreadToc, 0L) ) {
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/*
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** Thread has finished to continue
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*/
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case WAIT_OBJECT_0:
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break;
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/*
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** The thread is still running so just return
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*/
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case WAIT_TIMEOUT:
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default:
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{
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LocalFree( ptoc );
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return;
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}
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}
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CloseHandle( g_Devices[ cdrom ]->hThreadToc );
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}
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g_Devices[ cdrom ]->hThreadToc = CreateThread(
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NULL, 0L, (LPTHREAD_START_ROUTINE)TableOfContentsThread,
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(LPVOID)ptoc, 0L, &dwThreadId );
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/*
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** For now I will kill the app if I cannot create the
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** ReadTableOfContents thread. This is probably a bit
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** harsh.
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*/
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if (g_Devices[ cdrom ]->hThreadToc == NULL) {
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FatalApplicationError( STR_NO_RES, GetLastError() );
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}
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}
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/*****************************Private*Routine******************************\
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* TableOfContentsThread
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*
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* This is the worker thread that reads the table of contents for the
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* specified cdrom.
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*
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* Before the thread exits we post a message to the UI threads main window to
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* notify it that the TOC for this cdrom has been updated. It then examines the
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* database to determine if this cdrom is known and updates the screen ccordingly.
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*
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*
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* History:
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* 18-11-93 - StephenE - Created
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*
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\**************************************************************************/
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void
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TableOfContentsThread(
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TOC_THREAD_PARMS *ptoc
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)
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{
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DWORD status = 0;
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UCHAR num, numaudio;
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int cdrom;
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HWND hwndNotify;
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// This serializes access to this function
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// between multiple threads and the CDPlayer_OnTocRead
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// function on the main thread.
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// This prevents resource contention on CDROM Multi-changers
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EnterCriticalSection (&g_csTOCSerialize);
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cdrom = ptoc->cdrom;
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hwndNotify = ptoc->hwndNotify;
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LocalFree( ptoc );
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/*
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** Try to read the TOC from the drive.
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*/
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#ifdef USE_IOCTLS
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status = GetCdromTOC( g_Devices[cdrom]->hCd, &(g_Devices[cdrom]->toc) );
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num = g_Devices[cdrom]->toc.LastTrack - g_Devices[cdrom]->toc.FirstTrack+1;
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{
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int i;
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numaudio = 0;
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/*
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** Look for audio tracks...
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*/
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for( i = 0; i < num; i++ ) {
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if ( (g_Devices[cdrom]->toc.TrackData[i].Control &
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TRACK_TYPE_MASK ) == AUDIO_TRACK ) {
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numaudio++;
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}
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}
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}
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/*
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** Need to check if we got data tracks or audio
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** tracks back...if there is a mix, strip out
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** the data tracks...
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*/
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if (status == ERROR_SUCCESS) {
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/*
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** If there aren't any audio tracks, then we (most likely)
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** have a data CD loaded.
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*/
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if (numaudio == 0) {
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status == ERROR_UNRECOGNIZED_MEDIA;
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g_Devices[cdrom]->State = CD_DATA_CD_LOADED | CD_STOPPED;
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}
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else {
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g_Devices[cdrom]->State = CD_LOADED | CD_STOPPED;
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}
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}
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else {
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g_Devices[cdrom]->State = CD_NO_CD | CD_STOPPED;
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}
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#else
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{
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MCIDEVICEID wDeviceID;
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DWORD dwCDPlayerMode = 0L;
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OSVERSIONINFO os;
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os.dwOSVersionInfoSize = sizeof(os);
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GetVersionEx(&os);
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if (os.dwPlatformId != VER_PLATFORM_WIN32_NT)
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{
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if (g_Devices[cdrom]->hCd == 0) {
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g_Devices[cdrom]->hCd = OpenCdRom( g_Devices[cdrom]->drive,
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&status );
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}
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wDeviceID = g_Devices[cdrom]->hCd;
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}
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else
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{
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wDeviceID = OpenCdRom( g_Devices[cdrom]->drive, &status );
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}
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if ( wDeviceID != 0 ) {
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int i;
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numaudio = 0;
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status = GetCdromTOC( wDeviceID, &(g_Devices[cdrom]->toc) );
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/*
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** Need to check if we got data tracks or audio
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** tracks back...if there is a mix, strip out
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** the data tracks...
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*/
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if ( status == ERROR_SUCCESS) {
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num = g_Devices[cdrom]->toc.LastTrack -
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g_Devices[cdrom]->toc.FirstTrack + 1;
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for( i = 0; i < num; i++ ) {
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if ( IsCdromTrackAudio(wDeviceID, i) ) {
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numaudio++;
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}
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}
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}
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dwCDPlayerMode = GetCdromMode( wDeviceID );
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OSVERSIONINFO os;
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os.dwOSVersionInfoSize = sizeof(os);
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GetVersionEx(&os);
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if (os.dwPlatformId == VER_PLATFORM_WIN32_NT)
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{
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CloseCdRom( wDeviceID );
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}
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}
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/*
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** Need to check if we got data tracks or audio
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** tracks back...if there is a mix, strip out
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** the data tracks...
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*/
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if (status == ERROR_SUCCESS) {
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/*
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** If there aren't any audio tracks, then we (most likely)
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** have a data CD loaded.
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*/
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if (numaudio == 0) {
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g_Devices[cdrom]->State = CD_DATA_CD_LOADED | CD_STOPPED;
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}
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else {
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g_Devices[cdrom]->State = CD_LOADED;
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switch (dwCDPlayerMode) {
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case MCI_MODE_PAUSE:
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g_Devices[cdrom]->State |= CD_PAUSED;
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break;
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case MCI_MODE_PLAY:
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g_Devices[cdrom]->State |= CD_PLAYING;
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break;
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default:
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g_Devices[cdrom]->State |= CD_STOPPED;
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break;
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}
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}
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}
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else {
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if (status == (DWORD)MCIERR_MUST_USE_SHAREABLE) {
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g_Devices[cdrom]->State = CD_IN_USE;
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}
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if (g_Devices[cdrom]->State != CD_IN_USE) {
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g_Devices[cdrom]->State = CD_NO_CD | CD_STOPPED;
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}
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}
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}
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#endif
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/*
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** Notify the UI thread that a TOC has been read and then terminate the
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** thread.
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*/
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PostMessage( hwndNotify, WM_NOTIFY_TOC_READ,
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(WPARAM)cdrom, (LPARAM)numaudio );
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|
|
||
|
|
LeaveCriticalSection (&g_csTOCSerialize);
|
||
|
|
|
||
|
|
ExitThread( 1L );
|
||
|
|
}
|