/
CDPlayer.c
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Sam Lantinga
slouken@libsdl.org
*/
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#include "SDL_config.h"
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#include "CDPlayer.h"
#include "AudioFilePlayer.h"
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#include "SDLOSXCAGuard.h"
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/* we're exporting these functions into C land for SDL_syscdrom.c */
/*extern "C" {*/
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/*///////////////////////////////////////////////////////////////////////////
Constants
//////////////////////////////////////////////////////////////////////////*/
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#define kAudioCDFilesystemID (UInt16)(('J' << 8) | 'H') /* 'JH'; this avoids compiler warning */
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/* XML PList keys */
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#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"
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/*///////////////////////////////////////////////////////////////////////////
Globals
//////////////////////////////////////////////////////////////////////////*/
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#pragma mark -- Globals --
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static int playBackWasInit = 0;
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static AudioUnit theUnit;
static AudioFilePlayer* thePlayer = NULL;
static CDPlayerCompletionProc completionProc = NULL;
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static SDL_mutex *apiMutex = NULL;
static SDL_sem *callbackSem;
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static SDL_CD* theCDROM;
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/*///////////////////////////////////////////////////////////////////////////
Prototypes
//////////////////////////////////////////////////////////////////////////*/
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#pragma mark -- Prototypes --
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static OSStatus CheckInit ();
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static void FilePlayNotificationHandler (void* inRefCon, OSStatus inStatus);
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static int RunCallBackThread (void* inRefCon);
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#pragma mark -- Public Functions --
void Lock ()
{
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if (!apiMutex) {
apiMutex = SDL_CreateMutex();
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}
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SDL_mutexP(apiMutex);
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}
void Unlock ()
{
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SDL_mutexV(apiMutex);
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}
int DetectAudioCDVolumes(FSVolumeRefNum *volumes, int numVolumes)
{
int volumeIndex;
int cdVolumeCount = 0;
OSStatus result = noErr;
for (volumeIndex = 1; result == noErr || result != nsvErr; volumeIndex++)
{
FSVolumeRefNum actualVolume;
FSVolumeInfo volumeInfo;
memset (&volumeInfo, 0, sizeof(volumeInfo));
result = FSGetVolumeInfo (kFSInvalidVolumeRefNum,
volumeIndex,
&actualVolume,
kFSVolInfoFSInfo,
&volumeInfo,
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NULL,
NULL);
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if (result == noErr)
{
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if (volumeInfo.filesystemID == kAudioCDFilesystemID) /* It's an audio CD */
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{
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if (volumes != NULL && cdVolumeCount < numVolumes)
volumes[cdVolumeCount] = actualVolume;
cdVolumeCount++;
}
}
else
{
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/* I'm commenting this out because it seems to be harmless */
/*SDL_SetError ("DetectAudioCDVolumes: FSGetVolumeInfo returned %d", result);*/
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}
}
return cdVolumeCount;
}
int ReadTOCData (FSVolumeRefNum theVolume, SDL_CD *theCD)
{
HFSUniStr255 dataForkName;
OSStatus theErr;
SInt16 forkRefNum;
SInt64 forkSize;
Ptr forkData = 0;
ByteCount actualRead;
CFDataRef dataRef = 0;
CFPropertyListRef propertyListRef = 0;
FSRefParam fsRefPB;
FSRef tocPlistFSRef;
const char* error = "Unspecified Error";
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/* get stuff from .TOC.plist */
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fsRefPB.ioCompletion = NULL;
fsRefPB.ioNamePtr = "\p.TOC.plist";
fsRefPB.ioVRefNum = theVolume;
fsRefPB.ioDirID = 0;
fsRefPB.newRef = &tocPlistFSRef;
theErr = PBMakeFSRefSync (&fsRefPB);
if(theErr != noErr) {
error = "PBMakeFSRefSync";
goto bail;
}
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/* Load and parse the TOC XML data */
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theErr = FSGetDataForkName (&dataForkName);
if (theErr != noErr) {
error = "FSGetDataForkName";
goto bail;
}
theErr = FSOpenFork (&tocPlistFSRef, dataForkName.length, dataForkName.unicode, fsRdPerm, &forkRefNum);
if (theErr != noErr) {
error = "FSOpenFork";
goto bail;
}
theErr = FSGetForkSize (forkRefNum, &forkSize);
if (theErr != noErr) {
error = "FSGetForkSize";
goto bail;
}
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/* Allocate some memory for the XML data */
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forkData = NewPtr (forkSize);
if(forkData == NULL) {
error = "NewPtr";
goto bail;
}
theErr = FSReadFork (forkRefNum, fsFromStart, 0 /* offset location */, forkSize, forkData, &actualRead);
if(theErr != noErr) {
error = "FSReadFork";
goto bail;
}
dataRef = CFDataCreate (kCFAllocatorDefault, (UInt8 *)forkData, forkSize);
if(dataRef == 0) {
error = "CFDataCreate";
goto bail;
}
propertyListRef = CFPropertyListCreateFromXMLData (kCFAllocatorDefault,
dataRef,
kCFPropertyListImmutable,
NULL);
if (propertyListRef == NULL) {
error = "CFPropertyListCreateFromXMLData";
goto bail;
}
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/* Now we got the Property List in memory. Parse it. */
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/* First, make sure the root item is a CFDictionary. If not, release and bail. */
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if(CFGetTypeID(propertyListRef)== CFDictionaryGetTypeID())
{
CFDictionaryRef dictRef = (CFDictionaryRef)propertyListRef;
CFDataRef theRawTOCDataRef;
CFArrayRef theSessionArrayRef;
CFIndex numSessions;
CFIndex index;
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/* This is how we get the Raw TOC Data */
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theRawTOCDataRef = (CFDataRef)CFDictionaryGetValue (dictRef, CFSTR(kRawTOCDataString));
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/* Get the session array info. */
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theSessionArrayRef = (CFArrayRef)CFDictionaryGetValue (dictRef, CFSTR(kSessionsString));
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/* Find out how many sessions there are. */
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numSessions = CFArrayGetCount (theSessionArrayRef);
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/* Initialize the total number of tracks to 0 */
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theCD->numtracks = 0;
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/* Iterate over all sessions, collecting the track data */
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for(index = 0; index < numSessions; index++)
{
CFDictionaryRef theSessionDict;
CFNumberRef leadoutBlock;
CFArrayRef trackArray;
CFIndex numTracks;
CFIndex trackIndex;
UInt32 value = 0;
theSessionDict = (CFDictionaryRef) CFArrayGetValueAtIndex (theSessionArrayRef, index);
leadoutBlock = (CFNumberRef) CFDictionaryGetValue (theSessionDict, CFSTR(kLeadoutBlockString));
trackArray = (CFArrayRef)CFDictionaryGetValue (theSessionDict, CFSTR(kTrackArrayString));
numTracks = CFArrayGetCount (trackArray);
for(trackIndex = 0; trackIndex < numTracks; trackIndex++) {
CFDictionaryRef theTrackDict;
CFNumberRef trackNumber;
CFNumberRef sessionNumber;
CFNumberRef startBlock;
CFBooleanRef isDataTrack;
UInt32 value;
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));
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/* Fill in the SDL_CD struct */
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int idx = theCD->numtracks++;
CFNumberGetValue (trackNumber, kCFNumberSInt32Type, &value);
theCD->track[idx].id = value;
CFNumberGetValue (startBlock, kCFNumberSInt32Type, &value);
theCD->track[idx].offset = value;
theCD->track[idx].type = (isDataTrack == kCFBooleanTrue) ? SDL_DATA_TRACK : SDL_AUDIO_TRACK;
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/* Since the track lengths are not stored in .TOC.plist we compute them. */
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if (trackIndex > 0) {
theCD->track[idx-1].length = theCD->track[idx].offset - theCD->track[idx-1].offset;
}
}
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/* Compute the length of the last track */
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CFNumberGetValue (leadoutBlock, kCFNumberSInt32Type, &value);
theCD->track[theCD->numtracks-1].length =
value - theCD->track[theCD->numtracks-1].offset;
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/* Set offset to leadout track */
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theCD->track[theCD->numtracks].offset = value;
}
}
theErr = 0;
goto cleanup;
bail:
SDL_SetError ("ReadTOCData: %s returned %d", error, theErr);
theErr = -1;
cleanup:
if (propertyListRef != NULL)
CFRelease(propertyListRef);
if (dataRef != NULL)
CFRelease(dataRef);
if (forkData != NULL)
DisposePtr(forkData);
FSCloseFork (forkRefNum);
return theErr;
}
int ListTrackFiles (FSVolumeRefNum theVolume, FSRef *trackFiles, int numTracks)
{
OSStatus result = -1;
FSIterator iterator;
ItemCount actualObjects;
FSRef rootDirectory;
FSRef ref;
HFSUniStr255 nameStr;
result = FSGetVolumeInfo (theVolume,
0,
NULL,
kFSVolInfoFSInfo,
NULL,
NULL,
&rootDirectory);
if (result != noErr) {
SDL_SetError ("ListTrackFiles: FSGetVolumeInfo returned %d", result);
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return result;
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}
result = FSOpenIterator (&rootDirectory, kFSIterateFlat, &iterator);
if (result == noErr) {
do
{
result = FSGetCatalogInfoBulk (iterator, 1, &actualObjects,
NULL, kFSCatInfoNone, NULL, &ref, NULL, &nameStr);
if (result == noErr) {
CFStringRef name;
name = CFStringCreateWithCharacters (NULL, nameStr.unicode, nameStr.length);
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/* Look for .aiff extension */
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if (CFStringHasSuffix (name, CFSTR(".aiff")) ||
CFStringHasSuffix (name, CFSTR(".cdda"))) {
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/* Extract the track id from the filename */
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int trackID = 0, i = 0;
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while (i < nameStr.length && !isdigit(nameStr.unicode[i])) {
++i;
}
while (i < nameStr.length && isdigit(nameStr.unicode[i])) {
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trackID = 10 * trackID +(nameStr.unicode[i] - '0');
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++i;
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}
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#if DEBUG_CDROM
printf("Found AIFF for track %d: '%s'\n", trackID,
CFStringGetCStringPtr (name, CFStringGetSystemEncoding()));
#endif
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/* Track ID's start at 1, but we want to start at 0 */
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trackID--;
assert(0 <= trackID && trackID <= SDL_MAX_TRACKS);
if (trackID < numTracks)
memcpy (&trackFiles[trackID], &ref, sizeof(FSRef));
}
CFRelease (name);
}
} while(noErr == result);
FSCloseIterator (iterator);
}
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return 0;
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}
int LoadFile (const FSRef *ref, int startFrame, int stopFrame)
{
int error = -1;
if (CheckInit () < 0)
goto bail;
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/* release any currently playing file */
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if (ReleaseFile () < 0)
goto bail;
#if DEBUG_CDROM
printf ("LoadFile: %d %d\n", startFrame, stopFrame);
#endif
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/*try {*/
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/* create a new player, and attach to the audio unit */
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thePlayer = new_AudioFilePlayer(ref);
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if (thePlayer == NULL) {
SDL_SetError ("LoadFile: Could not create player");
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return -3; /*throw (-3);*/
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}
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if (!thePlayer->SetDestination(thePlayer, &theUnit))
goto bail;
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if (startFrame >= 0)
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thePlayer->SetStartFrame (thePlayer, startFrame);
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if (stopFrame >= 0 && stopFrame > startFrame)
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thePlayer->SetStopFrame (thePlayer, stopFrame);
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/* we set the notifier later */
/*thePlayer->SetNotifier(thePlayer, FilePlayNotificationHandler, NULL);*/
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if (!thePlayer->Connect(thePlayer))
goto bail;
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#if DEBUG_CDROM
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thePlayer->Print(thePlayer);
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fflush (stdout);
#endif
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/*}
catch (...)
{
goto bail;
}*/
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error = 0;
bail:
return error;
}
int ReleaseFile ()
{
int error = -1;
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/* (Don't see any way that the original C++ code could throw here.) --ryan. */
/*try {*/
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if (thePlayer != NULL) {
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thePlayer->Disconnect(thePlayer);
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delete_AudioFilePlayer(thePlayer);
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thePlayer = NULL;
}
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/*}
catch (...)
{
goto bail;
}*/
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error = 0;
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/* bail: */
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return error;
}
int PlayFile ()
{
OSStatus result = -1;
if (CheckInit () < 0)
goto bail;
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/*try {*/
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// start processing of the audio unit
result = AudioOutputUnitStart (theUnit);
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if (result) goto bail; //THROW_RESULT("PlayFile: AudioOutputUnitStart")
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/*}
catch (...)
{
goto bail;
}*/
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result = 0;
bail:
return result;
}
int PauseFile ()
{
OSStatus result = -1;
if (CheckInit () < 0)
goto bail;
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/*try {*/
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/* stop processing the audio unit */
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result = AudioOutputUnitStop (theUnit);
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if (result) goto bail; /*THROW_RESULT("PauseFile: AudioOutputUnitStop")*/
/*}
catch (...)
{
goto bail;
}*/
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result = 0;
bail:
return result;
}
void SetCompletionProc (CDPlayerCompletionProc proc, SDL_CD *cdrom)
{
assert(thePlayer != NULL);
theCDROM = cdrom;
completionProc = proc;
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thePlayer->SetNotifier (thePlayer, FilePlayNotificationHandler, cdrom);
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}
int GetCurrentFrame ()
{
int frame;
if (thePlayer == NULL)
frame = 0;
else
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frame = thePlayer->GetCurrentFrame (thePlayer);
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return frame;
}
#pragma mark -- Private Functions --
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static OSStatus CheckInit ()
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{
if (playBackWasInit)
return 0;
OSStatus result = noErr;
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/* Create the callback semaphore */
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callbackSem = SDL_CreateSemaphore(0);
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/* Start callback thread */
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SDL_CreateThread(RunCallBackThread, NULL);
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{ /*try {*/
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ComponentDescription desc;
desc.componentType = kAudioUnitComponentType;
desc.componentSubType = kAudioUnitSubType_Output;
desc.componentManufacturer = kAudioUnitID_DefaultOutput;
desc.componentFlags = 0;
desc.componentFlagsMask = 0;
Component comp = FindNextComponent (NULL, &desc);
if (comp == NULL) {
SDL_SetError ("CheckInit: FindNextComponent returned NULL");
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if (result) return -1; //throw(internalComponentErr);
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}
result = OpenAComponent (comp, &theUnit);
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if (result) return -1; //THROW_RESULT("CheckInit: OpenAComponent")
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// you need to initialize the output unit before you set it as a destination
result = AudioUnitInitialize (theUnit);
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if (result) return -1; //THROW_RESULT("CheckInit: AudioUnitInitialize")
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playBackWasInit = true;
}
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/*catch (...)
{
return -1;
}*/
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return 0;
}
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static void FilePlayNotificationHandler(void * inRefCon, OSStatus inStatus)
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{
if (inStatus == kAudioFilePlay_FileIsFinished) {
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/* notify non-CA thread to perform the callback */
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SDL_SemPost(callbackSem);
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} else if (inStatus == kAudioFilePlayErr_FilePlayUnderrun) {
SDL_SetError ("CDPlayer Notification: buffer underrun");
} else if (inStatus == kAudioFilePlay_PlayerIsUninitialized) {
SDL_SetError ("CDPlayer Notification: player is uninitialized");
} else {
SDL_SetError ("CDPlayer Notification: unknown error %ld", inStatus);
}
}
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static int RunCallBackThread (void *param)
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{
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for (;;) {
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SDL_SemWait(callbackSem);
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if (completionProc && theCDROM) {
#if DEBUG_CDROM
printf ("callback!\n");
#endif
(*completionProc)(theCDROM);
} else {
#if DEBUG_CDROM
printf ("callback?\n");
#endif
}
}
#if DEBUG_CDROM
printf ("thread dying now...\n");
#endif
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return 0;
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}
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/*}; // extern "C" */