src/cdrom/macosx/AudioFilePlayer.c
author Darren Alton <dalton@stevens.edu>
Tue, 10 Jun 2008 06:45:39 +0000
branchgsoc2008_nds
changeset 2669 e27bdcc80744
parent 1895 c121d94672cb
child 2859 99210400e8b9
permissions -rw-r--r--
First commit. Added header configs for DS as well as a Makefile. Initial work on framebuffer video driver, currently not functioning as desired.
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Library General Public
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    License as published by the Free Software Foundation; either
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    version 2 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Library General Public License for more details.
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    You should have received a copy of the GNU Library General Public
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    License along with this library; if not, write to the Free
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    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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    Sam Lantinga
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    slouken@libsdl.org
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    This file based on Apple sample code. We haven't changed the file name, 
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    so if you want to see the original search for it on apple.com/developer
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*/
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#include "SDL_config.h"
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/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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    AudioFilePlayer.cpp
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*/
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#include "AudioFilePlayer.h"
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/*
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void ThrowResult (OSStatus result, const char* str)
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{
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    SDL_SetError ("Error: %s %d", str, result);
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    throw result;
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}
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*/
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#if DEBUG
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static void
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PrintStreamDesc(AudioStreamBasicDescription * inDesc)
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{
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    if (!inDesc) {
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        printf("Can't print a NULL desc!\n");
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        return;
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    }
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    printf("- - - - - - - - - - - - - - - - - - - -\n");
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    printf("  Sample Rate:%f\n", inDesc->mSampleRate);
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    printf("  Format ID:%s\n", (char *) &inDesc->mFormatID);
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    printf("  Format Flags:%lX\n", inDesc->mFormatFlags);
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    printf("  Bytes per Packet:%ld\n", inDesc->mBytesPerPacket);
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    printf("  Frames per Packet:%ld\n", inDesc->mFramesPerPacket);
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    printf("  Bytes per Frame:%ld\n", inDesc->mBytesPerFrame);
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    printf("  Channels per Frame:%ld\n", inDesc->mChannelsPerFrame);
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    printf("  Bits per Channel:%ld\n", inDesc->mBitsPerChannel);
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    printf("- - - - - - - - - - - - - - - - - - - -\n");
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}
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#endif
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static int
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AudioFilePlayer_SetDestination(AudioFilePlayer * afp, AudioUnit * inDestUnit)
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{
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    /*if (afp->mConnected) throw static_cast<OSStatus>(-1); *//* can't set dest if already engaged */
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    if (afp->mConnected)
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        return 0;
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    SDL_memcpy(&afp->mPlayUnit, inDestUnit, sizeof(afp->mPlayUnit));
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    OSStatus result = noErr;
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    /* we can "down" cast a component instance to a component */
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    ComponentDescription desc;
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    result = GetComponentInfo((Component) * inDestUnit, &desc, 0, 0, 0);
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    if (result)
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        return 0;               /*THROW_RESULT("GetComponentInfo") */
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    /* we're going to use this to know which convert routine to call
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       a v1 audio unit will have a type of 'aunt'
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       a v2 audio unit will have one of several different types. */
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    if (desc.componentType != kAudioUnitComponentType) {
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        result = badComponentInstance;
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        /*THROW_RESULT("BAD COMPONENT") */
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        if (result)
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            return 0;
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    }
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    /* Set the input format of the audio unit. */
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    result = AudioUnitSetProperty(*inDestUnit,
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                                  kAudioUnitProperty_StreamFormat,
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                                  kAudioUnitScope_Input,
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                                  0,
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                                  &afp->mFileDescription,
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                                  sizeof(afp->mFileDescription));
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    /*THROW_RESULT("AudioUnitSetProperty") */
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    if (result)
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        return 0;
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    return 1;
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}
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static void
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AudioFilePlayer_SetNotifier(AudioFilePlayer * afp,
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                            AudioFilePlayNotifier inNotifier, void *inRefCon)
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{
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    afp->mNotifier = inNotifier;
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    afp->mRefCon = inRefCon;
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}
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static int
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AudioFilePlayer_IsConnected(AudioFilePlayer * afp)
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{
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    return afp->mConnected;
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}
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static AudioUnit
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AudioFilePlayer_GetDestUnit(AudioFilePlayer * afp)
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{
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    return afp->mPlayUnit;
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}
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static void
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AudioFilePlayer_Print(AudioFilePlayer * afp)
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{
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#if DEBUG
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    printf("Is Connected:%s\n", (IsConnected()? "true" : "false"));
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    printf("- - - - - - - - - - - - - - \n");
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#endif
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}
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static void
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AudioFilePlayer_SetStartFrame(AudioFilePlayer * afp, int frame)
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{
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    SInt64 position = frame * 2352;
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    afp->mStartFrame = frame;
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    afp->mAudioFileManager->SetPosition(afp->mAudioFileManager, position);
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}
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static int
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AudioFilePlayer_GetCurrentFrame(AudioFilePlayer * afp)
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{
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    return afp->mStartFrame +
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        (afp->mAudioFileManager->GetByteCounter(afp->mAudioFileManager) /
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         2352);
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}
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static void
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AudioFilePlayer_SetStopFrame(AudioFilePlayer * afp, int frame)
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{
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    SInt64 position = frame * 2352;
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    afp->mAudioFileManager->SetEndOfFile(afp->mAudioFileManager, position);
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}
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void
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delete_AudioFilePlayer(AudioFilePlayer * afp)
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{
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    if (afp != NULL) {
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        afp->Disconnect(afp);
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        if (afp->mAudioFileManager) {
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            delete_AudioFileManager(afp->mAudioFileManager);
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            afp->mAudioFileManager = 0;
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        }
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        if (afp->mForkRefNum) {
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            FSCloseFork(afp->mForkRefNum);
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            afp->mForkRefNum = 0;
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        }
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        SDL_free(afp);
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    }
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}
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static int
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AudioFilePlayer_Connect(AudioFilePlayer * afp)
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{
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#if DEBUG
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    printf("Connect:%x, engaged=%d\n", (int) afp->mPlayUnit,
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           (afp->mConnected ? 1 : 0));
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#endif
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    if (!afp->mConnected) {
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        if (!afp->mAudioFileManager->DoConnect(afp->mAudioFileManager))
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            return 0;
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        /* set the render callback for the file data to be supplied to the sound converter AU */
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        afp->mInputCallback.inputProc = afp->mAudioFileManager->FileInputProc;
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        afp->mInputCallback.inputProcRefCon = afp->mAudioFileManager;
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        OSStatus result = AudioUnitSetProperty(afp->mPlayUnit,
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                                               kAudioUnitProperty_SetInputCallback,
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                                               kAudioUnitScope_Input,
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                                               0,
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                                               &afp->mInputCallback,
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                                               sizeof(afp->mInputCallback));
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        if (result)
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            return 0;           /*THROW_RESULT("AudioUnitSetProperty") */
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        afp->mConnected = 1;
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    }
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    return 1;
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}
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/* warning noted, now please go away ;-) */
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/* #warning This should redirect the calling of notification code to some other thread */
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static void
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AudioFilePlayer_DoNotification(AudioFilePlayer * afp, OSStatus inStatus)
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{
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    if (afp->mNotifier) {
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        (*afp->mNotifier) (afp->mRefCon, inStatus);
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    } else {
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        SDL_SetError("Notification posted with no notifier in place");
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        if (inStatus == kAudioFilePlay_FileIsFinished)
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            afp->Disconnect(afp);
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   219
        else if (inStatus != kAudioFilePlayErr_FilePlayUnderrun)
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            afp->Disconnect(afp);
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   221
    }
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}
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static void
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AudioFilePlayer_Disconnect(AudioFilePlayer * afp)
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{
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#if DEBUG
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    printf("Disconnect:%x,%ld, engaged=%d\n", (int) afp->mPlayUnit, 0,
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           (afp->mConnected ? 1 : 0));
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#endif
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    if (afp->mConnected) {
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        afp->mConnected = 0;
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        afp->mInputCallback.inputProc = 0;
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        afp->mInputCallback.inputProcRefCon = 0;
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   236
        OSStatus result = AudioUnitSetProperty(afp->mPlayUnit,
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                                               kAudioUnitProperty_SetInputCallback,
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                                               kAudioUnitScope_Input,
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                                               0,
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                                               &afp->mInputCallback,
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                                               sizeof(afp->mInputCallback));
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        if (result)
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            SDL_SetError("AudioUnitSetProperty:RemoveInputCallback:%ld",
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                         result);
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        afp->mAudioFileManager->Disconnect(afp->mAudioFileManager);
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    }
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}
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typedef struct
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{
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    UInt32 offset;
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    UInt32 blockSize;
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} SSNDData;
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static int
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AudioFilePlayer_OpenFile(AudioFilePlayer * afp, const FSRef * inRef,
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                         SInt64 * outFileDataSize)
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{
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    ContainerChunk chunkHeader;
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    ChunkHeader chunk;
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    SSNDData ssndData;
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    OSErr result;
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    HFSUniStr255 dfName;
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    ByteCount actual;
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    SInt64 offset;
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    /* Open the data fork of the input file */
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    result = FSGetDataForkName(&dfName);
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    if (result)
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        return 0;               /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSGetDataForkName") */
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    result =
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        FSOpenFork(inRef, dfName.length, dfName.unicode, fsRdPerm,
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                   &afp->mForkRefNum);
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    if (result)
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        return 0;               /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSOpenFork") */
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    /* Read the file header, and check if it's indeed an AIFC file */
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    result =
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        FSReadFork(afp->mForkRefNum, fsAtMark, 0, sizeof(chunkHeader),
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                   &chunkHeader, &actual);
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    if (result)
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        return 0;               /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSReadFork") */
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    if (chunkHeader.ckID != 'FORM') {
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        result = -1;
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        if (result)
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            return 0;           /*THROW_RESULT("AudioFilePlayer::OpenFile(): chunk id is not 'FORM'"); */
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    }
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    if (chunkHeader.formType != 'AIFC') {
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        result = -1;
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        if (result)
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            return 0;           /*THROW_RESULT("AudioFilePlayer::OpenFile(): file format is not 'AIFC'"); */
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    }
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    /* Search for the SSND chunk. We ignore all compression etc. information
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       in other chunks. Of course that is kind of evil, but for now we are lazy
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       and rely on the cdfs to always give us the same fixed format.
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       TODO: Parse the COMM chunk we currently skip to fill in mFileDescription.
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     */
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    offset = 0;
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    do {
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        result =
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            FSReadFork(afp->mForkRefNum, fsFromMark, offset,
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                       sizeof(chunk), &chunk, &actual);
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        if (result)
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            return 0;           /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSReadFork") */
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        /* Skip the chunk data */
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        offset = chunk.ckSize;
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    } while (chunk.ckID != 'SSND');
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    /* Read the header of the SSND chunk. After this, we are positioned right
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       at the start of the audio data. */
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    result =
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        FSReadFork(afp->mForkRefNum, fsAtMark, 0, sizeof(ssndData),
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                   &ssndData, &actual);
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    if (result)
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        return 0;               /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSReadFork") */
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    result = FSSetForkPosition(afp->mForkRefNum, fsFromMark, ssndData.offset);
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    if (result)
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        return 0;               /*THROW_RESULT("AudioFilePlayer::OpenFile(): FSSetForkPosition") */
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    /* Data size */
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    *outFileDataSize = chunk.ckSize - ssndData.offset - 8;
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    /* File format */
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    afp->mFileDescription.mSampleRate = 44100;
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    afp->mFileDescription.mFormatID = kAudioFormatLinearPCM;
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    afp->mFileDescription.mFormatFlags =
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        kLinearPCMFormatFlagIsPacked | kLinearPCMFormatFlagIsSignedInteger;
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    afp->mFileDescription.mBytesPerPacket = 4;
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    afp->mFileDescription.mFramesPerPacket = 1;
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    afp->mFileDescription.mBytesPerFrame = 4;
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    afp->mFileDescription.mChannelsPerFrame = 2;
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    afp->mFileDescription.mBitsPerChannel = 16;
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    return 1;
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}
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AudioFilePlayer *
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new_AudioFilePlayer(const FSRef * inFileRef)
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{
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    SInt64 fileDataSize = 0;
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    AudioFilePlayer *afp =
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        (AudioFilePlayer *) SDL_malloc(sizeof(AudioFilePlayer));
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    if (afp == NULL)
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        return NULL;
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    SDL_memset(afp, '\0', sizeof(*afp));
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#define SET_AUDIOFILEPLAYER_METHOD(m) afp->m = AudioFilePlayer_##m
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    SET_AUDIOFILEPLAYER_METHOD(SetDestination);
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    SET_AUDIOFILEPLAYER_METHOD(SetNotifier);
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    SET_AUDIOFILEPLAYER_METHOD(SetStartFrame);
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    SET_AUDIOFILEPLAYER_METHOD(GetCurrentFrame);
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    SET_AUDIOFILEPLAYER_METHOD(SetStopFrame);
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    SET_AUDIOFILEPLAYER_METHOD(Connect);
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    SET_AUDIOFILEPLAYER_METHOD(Disconnect);
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    SET_AUDIOFILEPLAYER_METHOD(DoNotification);
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    SET_AUDIOFILEPLAYER_METHOD(IsConnected);
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    SET_AUDIOFILEPLAYER_METHOD(GetDestUnit);
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    SET_AUDIOFILEPLAYER_METHOD(Print);
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    SET_AUDIOFILEPLAYER_METHOD(OpenFile);
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#undef SET_AUDIOFILEPLAYER_METHOD
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    if (!afp->OpenFile(afp, inFileRef, &fileDataSize)) {
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        SDL_free(afp);
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        return NULL;
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    }
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    /* we want about 4 seconds worth of data for the buffer */
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    int bytesPerSecond =
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        (UInt32) (4 * afp->mFileDescription.mSampleRate *
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                  afp->mFileDescription.mBytesPerFrame);
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#if DEBUG
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    printf("File format:\n");
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    PrintStreamDesc(&afp->mFileDescription);
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#endif
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    afp->mAudioFileManager = new_AudioFileManager(afp, afp->mForkRefNum,
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                                                  fileDataSize,
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                                                  bytesPerSecond);
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    if (afp->mAudioFileManager == NULL) {
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        delete_AudioFilePlayer(afp);
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        return NULL;
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    }
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    return afp;
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}
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/* vi: set ts=4 sw=4 expandtab: */