/*

     File: AudioCDSample.c

 Abstract: Command-line tool demonstrating how to discover audio CDs and

 access the TOC information presented by the CD-DA filesystem.

  Version: 1.5

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*/

#include <CoreFoundation/CoreFoundation.h>

#include <Carbon/Carbon.h>

#include <IOKit/storage/IOCDTypes.h>

#include <string.h>

// Constants

#define kAudioCDFilesystemID        (UInt16)(('J' << 8) | 'H' ) // 'JH'; this avoids compiler warning

// XML property list keys. These constants are not defined in any public header file.

#define kRawTOCDataString           "Format 0x02 TOC Data"

#define kSessionsString             "Sessions"

#define kSessionTypeString          "Session Type"

#define kTrackArrayString           "Track Array"

#define kFirstTrackInSessionString  "First Track"

#define kLastTrackInSessionString   "Last Track"

#define kLeadoutBlockString         "Leadout Block"

#define kDataKeyString              "Data"

#define kPointKeyString             "Point"

#define kSessionNumberKeyString     "Session Number"

#define kStartBlockKeyString        "Start Block"

// Disc/session types

#define kDiscTypeCDDA_CDROM         0x00

#define kDiscTypeCD_I               0x10

#define kDiscTypeCDROM_XA           0x20

void PrintTOCData(const FSRef *theFSRef);

void PrintTOCData(const FSRef *theFSRef)

{

    HFSUniStr255        dataForkName;

    OSErr               result;

    FSIORefNum          forkRefNum;

    SInt64              forkSize;

    UInt8               *forkData;

    ByteCount           actualRead;

    CFDataRef           dataRef = 0;

    CFPropertyListRef   propertyListRef = 0;

    // Open the hidden TOC data plist and read the data from it.

    result = FSGetDataForkName(&dataForkName);

    if (result != noErr) {

        fprintf(stderr, "FSGetDataForkName() returned %d\n", result);

        return;

    }

    result = FSOpenFork(theFSRef, dataForkName.length, dataForkName.unicode, fsRdPerm, &forkRefNum);

    if (result != noErr) {

        fprintf(stderr, "FSOpenFork() returned %d\n", result);

        return;

    }

    // How large is the plist data?

    result = FSGetForkSize(forkRefNum, &forkSize);

    if (result != noErr) {

        fprintf(stderr, "FSGetForkSize() returned %d\n", result);

        return;

    }

    // Allocate memory for the plist data.

    forkData = malloc(forkSize);

    if (forkData == NULL) {

        fprintf(stderr, "malloc() returned NULL while allocating memory for plist data\n");

        return;

    }

    result = FSReadFork(forkRefNum, fsFromStart, 0, forkSize, forkData, &actualRead);

    if (result != noErr) {

        fprintf(stderr, "FSReadFork() returned %d\n", result);

        free(forkData);

        FSCloseFork(forkRefNum);

        return;

    }

    // Done with the plist file.

    FSCloseFork(forkRefNum);

    // Turn the raw plist data into a CFData object.

    dataRef = CFDataCreate(kCFAllocatorDefault, forkData, forkSize);

    if (dataRef != 0) {

        CFStringRef errorString;

        // Now turn the CFData into a CFPropertyList that we can parse using other CoreFoundation calls.

        propertyListRef = CFPropertyListCreateFromXMLData(kCFAllocatorDefault,

                                                          dataRef,

                                                          kCFPropertyListImmutable,

                                                          &errorString);

        // Ignore the error string if we get one back.

        if (errorString != 0) {

            CFRelease(errorString);

        }

        // Now done with the CFData.

        CFRelease(dataRef);

    }

    if (propertyListRef != 0) {

        // Now we have the property list in memory. Parse it.

        // First, make sure the root item is a CFDictionary. If not, release and bail.

        if (CFGetTypeID(propertyListRef) == CFDictionaryGetTypeID()) {

            CFDataRef   theRawTOCDataRef = 0;

            CFArrayRef  theSessionArrayRef = 0;

            CFIndex     numSessions = 0;

            UInt32      index = 0;

            // This is how we can get the raw TOC data. You can use the routines in <IOKit/storage/IOCDTypes.h>

            // to access the contents of the raw TOC data.

            theRawTOCDataRef = (CFDataRef) CFDictionaryGetValue(propertyListRef, CFSTR(kRawTOCDataString));

            UInt32 descriptorCount = CDTOCGetDescriptorCount((CDTOC *)CFDataGetBytePtr(theRawTOCDataRef));

            printf("Descriptor count = %u\n\n", descriptorCount);

            // Get the session array info.

            theSessionArrayRef = (CFArrayRef) CFDictionaryGetValue(propertyListRef, CFSTR(kSessionsString));

            // Find out how many sessions there are.

            numSessions = CFArrayGetCount(theSessionArrayRef);

            printf("Number of sessions = %u\n\n", (UInt32) numSessions);

            // Iterate across the sessions on the disc.

            for (index = 0; index < numSessions; index++) {

                CFDictionaryRef theSessionDict = 0;

                CFNumberRef     firstTrackNumber = 0;

                CFNumberRef     lastTrackNumber = 0;

                CFNumberRef     leadoutBlock = 0;

                CFNumberRef     sessionNumber = 0;

                CFNumberRef     sessionType = 0;

                CFArrayRef      trackArray = 0;

                CFIndex         numTracks = 0;

                UInt32          trackIndex = 0;

                UInt32          value = 0;

                theSessionDict = (CFDictionaryRef) CFArrayGetValueAtIndex(theSessionArrayRef, index);

                firstTrackNumber = (CFNumberRef) CFDictionaryGetValue(theSessionDict, CFSTR(kFirstTrackInSessionString));

                lastTrackNumber = (CFNumberRef) CFDictionaryGetValue(theSessionDict, CFSTR(kLastTrackInSessionString));

                leadoutBlock = (CFNumberRef) CFDictionaryGetValue(theSessionDict, CFSTR(kLeadoutBlockString));

                sessionType = (CFNumberRef) CFDictionaryGetValue(theSessionDict, CFSTR(kSessionTypeString));

                sessionNumber = (CFNumberRef) CFDictionaryGetValue(theSessionDict, CFSTR(kSessionNumberKeyString));

                if (CFNumberGetValue(sessionNumber, kCFNumberSInt32Type, &value)) {

                    printf("-----------------------------------\n");

                    printf("Session Number %u\n", value);

                    printf("-----------------------------------\n");

                }

                if (CFNumberGetValue(firstTrackNumber, kCFNumberSInt32Type, &value)) {

                    printf("First Track in session = %u\n", value);

                }

                if (CFNumberGetValue(lastTrackNumber, kCFNumberSInt32Type, &value)) {

                    printf("Last Track in session = %u\n", value);

                }

                if (CFNumberGetValue(leadoutBlock, kCFNumberSInt32Type, &value)) {

                    printf("Leadout block for session = %u\n", value);

                }

                if (CFNumberGetValue(sessionType, kCFNumberSInt32Type, &value)) {

                    switch (value) {

                        case kDiscTypeCDDA_CDROM:

                            printf("Session Type is CD-DA or CD-ROM with first track in Mode 1\n");

                            break;

                        case kDiscTypeCD_I:

                            printf("Session Type is CD-I\n");

                            break;

                        case kDiscTypeCDROM_XA:

                            printf ("Session Type is CD-ROM XA with first track in Mode 2\n");

                            break;

                        default:

                            break;

                    }

                }

                trackArray = (CFArrayRef) CFDictionaryGetValue(theSessionDict, CFSTR(kTrackArrayString));

                numTracks = CFArrayGetCount(trackArray);

                printf ( "\n" );

                // Now iterate across the tracks in this session.

                for (trackIndex = 0; trackIndex < numTracks; trackIndex++) {

                    CFDictionaryRef theTrackDict = 0;

                    CFNumberRef     trackNumber = 0;

                    CFNumberRef     startBlock = 0;

                    CFBooleanRef    isDataTrack = kCFBooleanFalse;

                    theTrackDict = (CFDictionaryRef) CFArrayGetValueAtIndex(trackArray, trackIndex);

                    trackNumber = (CFNumberRef) CFDictionaryGetValue(theTrackDict, CFSTR(kPointKeyString));

                    sessionNumber = (CFNumberRef) CFDictionaryGetValue(theTrackDict, CFSTR(kSessionNumberKeyString));

                    startBlock = (CFNumberRef) CFDictionaryGetValue(theTrackDict, CFSTR(kStartBlockKeyString));

                    isDataTrack = (CFBooleanRef) CFDictionaryGetValue(theTrackDict, CFSTR(kDataKeyString));

                    if (CFNumberGetValue(trackNumber, kCFNumberSInt32Type, &value)) {

                        printf("Track Number = %u\n", value);

                    }

                    if (CFNumberGetValue(sessionNumber, kCFNumberSInt32Type, &value)) {

                        printf("It resides in session %u\n", value);

                    }

                    if (CFNumberGetValue(startBlock, kCFNumberSInt32Type, &value)) {

                        printf("Track starts at block = %u\n", value);

                    }

                    if (isDataTrack == kCFBooleanTrue) {

                        printf("This is a DATA track\n");

                    }

                    else {

                        printf("This is an AUDIO track\n");

                    }

                    printf("\n");

                }

            }

        }

        // Now done with the property list.

        CFRelease(propertyListRef);

    }

}

//ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

//  main

//ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ

int main(int argc, char* argv[])

{

    OSErr       result = noErr;

    ItemCount   volumeIndex;

    // Enumerate all of the mounted volumes on the system looking for audio CDs.

    for (volumeIndex = 1; result == noErr || result != nsvErr; volumeIndex++) {

        FSVolumeRefNum  actualVolume;

        HFSUniStr255    volumeName;

        FSVolumeInfo    volumeInfo;

        FSRef           rootDirectory;

        bzero((void *) &volumeInfo, sizeof(volumeInfo));

        // Get the volume info, which includes the filesystem ID.

        result = FSGetVolumeInfo(kFSInvalidVolumeRefNum,

                                 volumeIndex,

                                 &actualVolume,

                                 kFSVolInfoFSInfo,

                                 &volumeInfo,

                                 &volumeName,

                                 &rootDirectory); 

        if (result == noErr) {

            // Work around a bug in Mac OS X 10.0.x where the filesystem ID and signature bytes were

            // erroneously swapped. This was fixed in Mac OS X 10.1 (r. 2653443), broken again in Jaguar (r. 3015107),

            // and finally fixed in 10.2.3.

            //

            // This is the same workaround used by iTunes, so if iTunes thinks a disc is an audio CD,

            // so should this sample.

            if (volumeInfo.signature == kAudioCDFilesystemID ||

                volumeInfo.filesystemID == kAudioCDFilesystemID) {

                // It's an audio CD.

                FSRef           tocPlistFSRef;

                OSStatus        status;

                pid_t           dissenter;

                // The CD-DA (Digital Audio) filesystem makes every track appear as a separate AIFF audio file.

                // These files can be played using QuickTime or Core Audio.

                // The filesystem also makes the table of contents (TOC) appear as a hidden XML property list file

                // named ".TOC.plist". The plist file contains both the raw and parsed TOC data.

                // Create an FSRef referring to the TOC plist file.                                                

                const char plistName[] = ".TOC.plist";

                CFURLRef rootURL = CFURLCreateFromFSRef(kCFAllocatorDefault, &rootDirectory);

                CFURLRef plistURL = CFURLCreateFromFileSystemRepresentationRelativeToBase(kCFAllocatorDefault,

                                                                                          (const UInt8 *)plistName, 

                                                                                          strlen(plistName), 

                                                                                          false, 

                                                                                          rootURL);

                if (CFURLGetFSRef(plistURL, &tocPlistFSRef)) {

                    PrintTOCData(&tocPlistFSRef);

                }

                else {

                    printf("CFURLGetFSRef() returned false\n");

                }

                CFRelease(plistURL);

                CFRelease(rootURL);

                // Eject the disc.

                status = FSEjectVolumeSync(actualVolume, kNilOptions, &dissenter);               

                if (status != noErr) {

                    printf("FSEjectVolumeSync returned %d\n", status);

                }

            }

        }

    }

    return 0;

}