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Replaced Mac OS X's C++ cdrom code with almost-direct translation to …
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…C. Sam

 requested this effort on the mailing list, apparently because of binary
 compatibility issues between 10.4 and earlier systems (or gcc4 and earlier
 compilers?).

Works fine with SDL12/test/testcdrom.c, with this command line:

./testcdrom -status -list -play -sleep 5000 -pause -sleep 3000 -resume \
            -sleep 5000 -stop -sleep 3000 -play -sleep 3000 -stop \
            -sleep 3000 -eject

Unix Makefiles work, XCode project still need updating for new filenames.
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icculus committed Sep 22, 2005
1 parent 3c7584f commit 043b581
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352 changes: 352 additions & 0 deletions src/cdrom/macosx/AudioFilePlayer.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
This file based on Apple sample code. We haven't changed the file name,
so if you want to see the original search for it on apple.com/developer
*/

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// AudioFilePlayer.cpp
//
#include "AudioFilePlayer.h"

/*
void ThrowResult (OSStatus result, const char* str)
{
SDL_SetError ("Error: %s %d", str, result);
throw result;
}
*/

#if DEBUG
static void PrintStreamDesc (AudioStreamBasicDescription *inDesc)
{
if (!inDesc) {
printf ("Can't print a NULL desc!\n");
return;
}

printf ("- - - - - - - - - - - - - - - - - - - -\n");
printf (" Sample Rate:%f\n", inDesc->mSampleRate);
printf (" Format ID:%s\n", (char*)&inDesc->mFormatID);
printf (" Format Flags:%lX\n", inDesc->mFormatFlags);
printf (" Bytes per Packet:%ld\n", inDesc->mBytesPerPacket);
printf (" Frames per Packet:%ld\n", inDesc->mFramesPerPacket);
printf (" Bytes per Frame:%ld\n", inDesc->mBytesPerFrame);
printf (" Channels per Frame:%ld\n", inDesc->mChannelsPerFrame);
printf (" Bits per Channel:%ld\n", inDesc->mBitsPerChannel);
printf ("- - - - - - - - - - - - - - - - - - - -\n");
}
#endif


static int AudioFilePlayer_SetDestination (AudioFilePlayer *afp, AudioUnit *inDestUnit)
{
//if (afp->mConnected) throw static_cast<OSStatus>(-1); //can't set dest if already engaged
if (afp->mConnected)
return 0 ;

memcpy(&afp->mPlayUnit, inDestUnit, sizeof (afp->mPlayUnit));

OSStatus result = noErr;


//we can "down" cast a component instance to a component
ComponentDescription desc;
result = GetComponentInfo ((Component)*inDestUnit, &desc, 0, 0, 0);
if (result) return 0; //THROW_RESULT("GetComponentInfo")

// we're going to use this to know which convert routine to call
// a v1 audio unit will have a type of 'aunt'
// a v2 audio unit will have one of several different types.
if (desc.componentType != kAudioUnitComponentType) {
result = badComponentInstance;
//THROW_RESULT("BAD COMPONENT")
if (result) return 0;
}

/* Set the input format of the audio unit. */
result = AudioUnitSetProperty (*inDestUnit,
kAudioUnitProperty_StreamFormat,
kAudioUnitScope_Input,
0,
&afp->mFileDescription,
sizeof (afp->mFileDescription));
//THROW_RESULT("AudioUnitSetProperty")
if (result) return 0;
return 1;
}

static void AudioFilePlayer_SetNotifier(AudioFilePlayer *afp, AudioFilePlayNotifier inNotifier, void *inRefCon)
{
afp->mNotifier = inNotifier;
afp->mRefCon = inRefCon;
}

static int AudioFilePlayer_IsConnected(AudioFilePlayer *afp)
{
return afp->mConnected;
}

static AudioUnit AudioFilePlayer_GetDestUnit(AudioFilePlayer *afp)
{
return afp->mPlayUnit;
}

static void AudioFilePlayer_Print(AudioFilePlayer *afp)
{
#if DEBUG
printf ("Is Connected:%s\n", (IsConnected() ? "true" : "false"));
printf ("- - - - - - - - - - - - - - \n");
#endif
}

static void AudioFilePlayer_SetStartFrame (AudioFilePlayer *afp, int frame)
{
SInt64 position = frame * 2352;

afp->mStartFrame = frame;
afp->mAudioFileManager->SetPosition (afp->mAudioFileManager, position);
}


static int AudioFilePlayer_GetCurrentFrame (AudioFilePlayer *afp)
{
return afp->mStartFrame + (afp->mAudioFileManager->GetByteCounter(afp->mAudioFileManager) / 2352);
}

static void AudioFilePlayer_SetStopFrame (AudioFilePlayer *afp, int frame)
{
SInt64 position = frame * 2352;

afp->mAudioFileManager->SetEndOfFile (afp->mAudioFileManager, position);
}

void delete_AudioFilePlayer(AudioFilePlayer *afp)
{
if (afp != NULL)
{
afp->Disconnect(afp);

if (afp->mAudioFileManager) {
delete_AudioFileManager(afp->mAudioFileManager);
afp->mAudioFileManager = 0;
}

if (afp->mForkRefNum) {
FSClose (afp->mForkRefNum);
afp->mForkRefNum = 0;
}
free(afp);
}
}

static int AudioFilePlayer_Connect(AudioFilePlayer *afp)
{
#if DEBUG
printf ("Connect:%x, engaged=%d\n", (int)afp->mPlayUnit, (afp->mConnected ? 1 : 0));
#endif
if (!afp->mConnected)
{
if (!afp->mAudioFileManager->DoConnect(afp->mAudioFileManager))
return 0;

// set the render callback for the file data to be supplied to the sound converter AU
afp->mInputCallback.inputProc = afp->mAudioFileManager->FileInputProc;
afp->mInputCallback.inputProcRefCon = afp->mAudioFileManager;

OSStatus result = AudioUnitSetProperty (afp->mPlayUnit,
kAudioUnitProperty_SetInputCallback,
kAudioUnitScope_Input,
0,
&afp->mInputCallback,
sizeof(afp->mInputCallback));
if (result) return 0; //THROW_RESULT("AudioUnitSetProperty")
afp->mConnected = 1;
}

return 1;
}

// warning noted, now please go away ;-)
// #warning This should redirect the calling of notification code to some other thread
static void AudioFilePlayer_DoNotification (AudioFilePlayer *afp, OSStatus inStatus)
{
if (afp->mNotifier) {
(*afp->mNotifier) (afp->mRefCon, inStatus);
} else {
SDL_SetError ("Notification posted with no notifier in place");

if (inStatus == kAudioFilePlay_FileIsFinished)
afp->Disconnect(afp);
else if (inStatus != kAudioFilePlayErr_FilePlayUnderrun)
afp->Disconnect(afp);
}
}

static void AudioFilePlayer_Disconnect (AudioFilePlayer *afp)
{
#if DEBUG
printf ("Disconnect:%x,%ld, engaged=%d\n", (int)afp->mPlayUnit, 0, (afp->mConnected ? 1 : 0));
#endif
if (afp->mConnected)
{
afp->mConnected = 0;

afp->mInputCallback.inputProc = 0;
afp->mInputCallback.inputProcRefCon = 0;
OSStatus result = AudioUnitSetProperty (afp->mPlayUnit,
kAudioUnitProperty_SetInputCallback,
kAudioUnitScope_Input,
0,
&afp->mInputCallback,
sizeof(afp->mInputCallback));
if (result)
SDL_SetError ("AudioUnitSetProperty:RemoveInputCallback:%ld", result);

afp->mAudioFileManager->Disconnect(afp->mAudioFileManager);
}
}

typedef struct {
UInt32 offset;
UInt32 blockSize;
} SSNDData;

static int AudioFilePlayer_OpenFile (AudioFilePlayer *afp, const FSRef *inRef, SInt64 *outFileDataSize)
{
ContainerChunk chunkHeader;
ChunkHeader chunk;
SSNDData ssndData;

OSErr result;
HFSUniStr255 dfName;
ByteCount actual;
SInt64 offset;

// Open the data fork of the input file
result = FSGetDataForkName(&dfName);
if (result) return 0; //THROW_RESULT("AudioFilePlayer::OpenFile(): FSGetDataForkName")

result = FSOpenFork(inRef, dfName.length, dfName.unicode, fsRdPerm, &afp->mForkRefNum);
if (result) return 0; //THROW_RESULT("AudioFilePlayer::OpenFile(): FSOpenFork")

// Read the file header, and check if it's indeed an AIFC file
result = FSReadFork(afp->mForkRefNum, fsAtMark, 0, sizeof(chunkHeader), &chunkHeader, &actual);
if (result) return 0; //THROW_RESULT("AudioFilePlayer::OpenFile(): FSReadFork")

if (chunkHeader.ckID != 'FORM') {
result = -1;
if (result) return 0; //THROW_RESULT("AudioFilePlayer::OpenFile(): chunk id is not 'FORM'");
}

if (chunkHeader.formType != 'AIFC') {
result = -1;
if (result) return 0; //THROW_RESULT("AudioFilePlayer::OpenFile(): file format is not 'AIFC'");
}

// Search for the SSND chunk. We ignore all compression etc. information
// in other chunks. Of course that is kind of evil, but for now we are lazy
// and rely on the cdfs to always give us the same fixed format.
// TODO: Parse the COMM chunk we currently skip to fill in mFileDescription.
offset = 0;
do {
result = FSReadFork(afp->mForkRefNum, fsFromMark, offset, sizeof(chunk), &chunk, &actual);
if (result) return 0; //THROW_RESULT("AudioFilePlayer::OpenFile(): FSReadFork")

// Skip the chunk data
offset = chunk.ckSize;
} while (chunk.ckID != 'SSND');

// Read the header of the SSND chunk. After this, we are positioned right
// at the start of the audio data.
result = FSReadFork(afp->mForkRefNum, fsAtMark, 0, sizeof(ssndData), &ssndData, &actual);
if (result) return 0; //THROW_RESULT("AudioFilePlayer::OpenFile(): FSReadFork")

result = FSSetForkPosition(afp->mForkRefNum, fsFromMark, ssndData.offset);
if (result) return 0; //THROW_RESULT("AudioFilePlayer::OpenFile(): FSSetForkPosition")

// Data size
*outFileDataSize = chunk.ckSize - ssndData.offset - 8;

// File format
afp->mFileDescription.mSampleRate = 44100;
afp->mFileDescription.mFormatID = kAudioFormatLinearPCM;
afp->mFileDescription.mFormatFlags = kLinearPCMFormatFlagIsPacked | kLinearPCMFormatFlagIsSignedInteger;
afp->mFileDescription.mBytesPerPacket = 4;
afp->mFileDescription.mFramesPerPacket = 1;
afp->mFileDescription.mBytesPerFrame = 4;
afp->mFileDescription.mChannelsPerFrame = 2;
afp->mFileDescription.mBitsPerChannel = 16;

return 1;
}

AudioFilePlayer *new_AudioFilePlayer (const FSRef *inFileRef)
{
SInt64 fileDataSize = 0;

AudioFilePlayer *afp = (AudioFilePlayer *) malloc(sizeof (AudioFilePlayer));
if (afp == NULL)
return NULL;
memset(afp, '\0', sizeof (*afp));

#define SET_AUDIOFILEPLAYER_METHOD(m) afp->m = AudioFilePlayer_##m
SET_AUDIOFILEPLAYER_METHOD(SetDestination);
SET_AUDIOFILEPLAYER_METHOD(SetNotifier);
SET_AUDIOFILEPLAYER_METHOD(SetStartFrame);
SET_AUDIOFILEPLAYER_METHOD(GetCurrentFrame);
SET_AUDIOFILEPLAYER_METHOD(SetStopFrame);
SET_AUDIOFILEPLAYER_METHOD(Connect);
SET_AUDIOFILEPLAYER_METHOD(Disconnect);
SET_AUDIOFILEPLAYER_METHOD(DoNotification);
SET_AUDIOFILEPLAYER_METHOD(IsConnected);
SET_AUDIOFILEPLAYER_METHOD(GetDestUnit);
SET_AUDIOFILEPLAYER_METHOD(Print);
SET_AUDIOFILEPLAYER_METHOD(OpenFile);
#undef SET_AUDIOFILEPLAYER_METHOD

if (!afp->OpenFile (afp, inFileRef, &fileDataSize))
{
free(afp);
return NULL;
}

// we want about 4 seconds worth of data for the buffer
int bytesPerSecond = (UInt32) (4 * afp->mFileDescription.mSampleRate * afp->mFileDescription.mBytesPerFrame);

#if DEBUG
printf("File format:\n");
PrintStreamDesc (&afp->mFileDescription);
#endif

afp->mAudioFileManager = new_AudioFileManager(afp, afp->mForkRefNum,
fileDataSize,
bytesPerSecond);
if (afp->mAudioFileManager == NULL)
{
delete_AudioFilePlayer(afp);
return NULL;
}

return afp;
}

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