/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/* Engine implementation */

//#include "sles_allinclusive.h"

static SLresult IEngine_CreateLEDDevice(SLEngineItf self, SLObjectItf *pDevice,
    SLuint32 deviceID, SLuint32 numInterfaces,
    const SLInterfaceID *pInterfaceIds, const SLboolean *pInterfaceRequired)
{
    if (NULL == pDevice || SL_DEFAULTDEVICEID_LED != deviceID)
        return SL_RESULT_PARAMETER_INVALID;
    *pDevice = NULL;
    unsigned exposedMask;
    SLresult result = checkInterfaces(&CLEDDevice_class, numInterfaces,
        pInterfaceIds, pInterfaceRequired, &exposedMask);
    if (SL_RESULT_SUCCESS != result)
        return result;
    CLEDDevice *this = (CLEDDevice *)
        construct(&CLEDDevice_class, exposedMask, self);
    if (NULL == this)
        return SL_RESULT_MEMORY_FAILURE;
    SLHSL *color = (SLHSL *) malloc(sizeof(SLHSL) * this->mLEDArray.mCount);
    // FIXME
    assert(NULL != this->mLEDArray.mColor);
    this->mLEDArray.mColor = color;
    unsigned i;
    for (i = 0; i < this->mLEDArray.mCount; ++i) {
        // per specification 1.0.1 pg. 259: "Default color is undefined."
        color->hue = 0;
        color->saturation = 1000;
        color->lightness = 1000;
    }
    this->mDeviceID = deviceID;
    *pDevice = &this->mObject.mItf;
    return SL_RESULT_SUCCESS;
}

static SLresult IEngine_CreateVibraDevice(SLEngineItf self,
    SLObjectItf *pDevice, SLuint32 deviceID, SLuint32 numInterfaces,
    const SLInterfaceID *pInterfaceIds, const SLboolean *pInterfaceRequired)
{
    if (NULL == pDevice || SL_DEFAULTDEVICEID_VIBRA != deviceID)
        return SL_RESULT_PARAMETER_INVALID;
    *pDevice = NULL;
    unsigned exposedMask;
    SLresult result = checkInterfaces(&CVibraDevice_class, numInterfaces,
        pInterfaceIds, pInterfaceRequired, &exposedMask);
    if (SL_RESULT_SUCCESS != result)
        return result;
    CVibraDevice *this = (CVibraDevice *)
        construct(&CVibraDevice_class, exposedMask, self);
    if (NULL == this)
        return SL_RESULT_MEMORY_FAILURE;
    this->mDeviceID = deviceID;
    *pDevice = &this->mObject.mItf;
    return SL_RESULT_SUCCESS;
}


static SLresult IEngine_CreateAudioPlayer(SLEngineItf self, SLObjectItf *pPlayer,
    SLDataSource *pAudioSrc, SLDataSink *pAudioSnk, SLuint32 numInterfaces,
    const SLInterfaceID *pInterfaceIds, const SLboolean *pInterfaceRequired)
{
    fprintf(stderr, "entering IEngine_CreateAudioPlayer()\n");

    if (NULL == pPlayer)
        return SL_RESULT_PARAMETER_INVALID;
    *pPlayer = NULL;
    unsigned exposedMask;
    SLresult result = checkInterfaces(&CAudioPlayer_class, numInterfaces,
        pInterfaceIds, pInterfaceRequired, &exposedMask);
    if (SL_RESULT_SUCCESS != result)
        return result;
    // check the audio source and sinks
    result = sles_checkAudioPlayerSourceSink(pAudioSrc, pAudioSnk);
    if (result != SL_RESULT_SUCCESS) {
        return result;
    }
    fprintf(stderr, "\t after sles_checkSourceSink()\n");
    // check the audio source and sink parameters against platform support
#ifdef USE_ANDROID
    result = sles_to_android_checkAudioPlayerSourceSink(pAudioSrc, pAudioSnk);
    if (result != SL_RESULT_SUCCESS) {
            return result;
    }
    fprintf(stderr, "\t after sles_to_android_checkAudioPlayerSourceSink()\n");
#endif

#ifdef USE_SNDFILE
    SLuint32 locatorType = *(SLuint32 *)pAudioSrc->pLocator;
    SLuint32 formatType = *(SLuint32 *)pAudioSrc->pFormat;
    SLuint32 numBuffers = 0;
    SLDataFormat_PCM *df_pcm = NULL;
    SLchar *pathname = NULL;
    switch (locatorType) {
    case SL_DATALOCATOR_BUFFERQUEUE:
        {
        SLDataLocator_BufferQueue *dl_bq =
            (SLDataLocator_BufferQueue *) pAudioSrc->pLocator;
        numBuffers = dl_bq->numBuffers;
        if (0 == numBuffers)
            return SL_RESULT_PARAMETER_INVALID;
        switch (formatType) {
        case SL_DATAFORMAT_PCM:
            {
            df_pcm = (SLDataFormat_PCM *) pAudioSrc->pFormat;
            switch (df_pcm->numChannels) {
            case 1:
            case 2:
                break;
            default:
                return SL_RESULT_CONTENT_UNSUPPORTED;
            }
            switch (df_pcm->samplesPerSec) {
            case 44100:
                break;
#if 1 // wrong units for samplesPerSec!
            case SL_SAMPLINGRATE_44_1:
                break;
#endif
            // others
            default:
                return SL_RESULT_CONTENT_UNSUPPORTED;
            }
            switch (df_pcm->bitsPerSample) {
            case SL_PCMSAMPLEFORMAT_FIXED_16:
                break;
            // others
            default:
                return SL_RESULT_CONTENT_UNSUPPORTED;
            }
            switch (df_pcm->containerSize) {
            case 16:
                break;
            // others
            default:
                return SL_RESULT_CONTENT_UNSUPPORTED;
            }
            switch (df_pcm->channelMask) {
            // needs work
            default:
                break;
            }
            switch (df_pcm->endianness) {
            case SL_BYTEORDER_LITTLEENDIAN:
                break;
            // others esp. big and native (new not in spec)
            default:
                return SL_RESULT_CONTENT_UNSUPPORTED;
            }
            }
            break;
        case SL_DATAFORMAT_MIME:
        case SL_DATAFORMAT_RESERVED3:
            return SL_RESULT_CONTENT_UNSUPPORTED;
        default:
            return SL_RESULT_PARAMETER_INVALID;
        }
        }
        break;
    case SL_DATALOCATOR_URI:
        {
        SLDataLocator_URI *dl_uri = (SLDataLocator_URI *) pAudioSrc->pLocator;
        SLchar *uri = dl_uri->URI;
        if (NULL == uri)
            return SL_RESULT_PARAMETER_INVALID;
        if (strncmp((const char *) uri, "file:///", 8))
            return SL_RESULT_CONTENT_UNSUPPORTED;
        pathname = &uri[8];
        switch (formatType) {
        case SL_DATAFORMAT_MIME:
            {
            SLDataFormat_MIME *df_mime =
                (SLDataFormat_MIME *) pAudioSrc->pFormat;
            SLchar *mimeType = df_mime->mimeType;
            if (NULL == mimeType)
                return SL_RESULT_PARAMETER_INVALID;
            SLuint32 containerType = df_mime->containerType;
            if (!strcmp((const char *) mimeType, "audio/x-wav"))
                ;
            // else if (others)
            //    ;
            else
                return SL_RESULT_CONTENT_UNSUPPORTED;
            switch (containerType) {
            case SL_CONTAINERTYPE_WAV:
                break;
            // others
            default:
                return SL_RESULT_CONTENT_UNSUPPORTED;
            }
            }
            break;
        default:
            return SL_RESULT_CONTENT_UNSUPPORTED;
        }
        // FIXME magic number, should be configurable
        numBuffers = 2;
        }
        break;
    case SL_DATALOCATOR_ADDRESS:
    case SL_DATALOCATOR_IODEVICE:
    case SL_DATALOCATOR_OUTPUTMIX:
    case SL_DATALOCATOR_RESERVED5:
    case SL_DATALOCATOR_MIDIBUFFERQUEUE:
    case SL_DATALOCATOR_RESERVED8:
        return SL_RESULT_CONTENT_UNSUPPORTED;
    default:
        return SL_RESULT_PARAMETER_INVALID;
    }
#endif // USE_SNDFILE

#ifdef USE_OUTPUTMIXEXT
    struct Track *track = NULL;
    switch (*(SLuint32 *)pAudioSnk->pLocator) {
    case SL_DATALOCATOR_OUTPUTMIX:
        {
        // pAudioSnk->pFormat is ignored
        SLDataLocator_OutputMix *dl_outmix =
            (SLDataLocator_OutputMix *) pAudioSnk->pLocator;
        SLObjectItf outputMix = dl_outmix->outputMix;
        // FIXME make this an operation on Object: GetClass
        if ((NULL == outputMix) || (&COutputMix_class !=
            ((IObject *) outputMix)->mClass))
            return SL_RESULT_PARAMETER_INVALID;
        IOutputMix *om =
            &((COutputMix *) outputMix)->mOutputMix;
        // allocate an entry within OutputMix for this track
        // FIXME O(n)
        unsigned i;
        for (i = 0, track = &om->mTracks[0]; i < 32; ++i, ++track) {
            if (om->mActiveMask & (1 << i))
                continue;
            om->mActiveMask |= 1 << i;
            break;
        }
        if (32 <= i) {
            // FIXME Need a better error code for all slots full in output mix
            return SL_RESULT_MEMORY_FAILURE;
        }
        // FIXME replace the above for Android - do not use our own mixer!
        }
        break;
    case SL_DATALOCATOR_BUFFERQUEUE:
    case SL_DATALOCATOR_URI:
    case SL_DATALOCATOR_ADDRESS:
    case SL_DATALOCATOR_IODEVICE:
    case SL_DATALOCATOR_RESERVED5:
    case SL_DATALOCATOR_MIDIBUFFERQUEUE:
    case SL_DATALOCATOR_RESERVED8:
        return SL_RESULT_CONTENT_UNSUPPORTED;
    default:
        return SL_RESULT_PARAMETER_INVALID;
    }
#endif // USE_OUTPUTMIXEXT

    // Construct our new AudioPlayer instance
    CAudioPlayer *this = (CAudioPlayer *) construct(&CAudioPlayer_class, exposedMask, self);
    if (NULL == this) {
        return SL_RESULT_MEMORY_FAILURE;
    }

    // DataSource specific initializations
    switch(*(SLuint32 *)pAudioSrc->pLocator) {
    case SL_DATALOCATOR_URI:
#ifndef USE_OUTPUTMIXEXT // e.g. USE_ANDROID
        break;
#else
        // fall through
#endif
    case SL_DATALOCATOR_BUFFERQUEUE:
        {
        SLDataLocator_BufferQueue *dl_bq = (SLDataLocator_BufferQueue *) pAudioSrc->pLocator;
        SLuint32 numBuffs = dl_bq->numBuffers;
        if (0 == numBuffs) {
            return SL_RESULT_PARAMETER_INVALID;
        }
        this->mBufferQueue.mNumBuffers = numBuffs;
        // inline allocation of circular mArray, up to a typical max
        if (BUFFER_HEADER_TYPICAL >= numBuffs) {
            this->mBufferQueue.mArray = this->mBufferQueue.mTypical;
        } else {
            // FIXME integer overflow possible during multiplication
            this->mBufferQueue.mArray = (struct BufferHeader *)
                    malloc((numBuffs + 1) * sizeof(struct BufferHeader));
            if (NULL == this->mBufferQueue.mArray) {
                free(this);
                return SL_RESULT_MEMORY_FAILURE;
            }
        }
        this->mBufferQueue.mFront = this->mBufferQueue.mArray;
        this->mBufferQueue.mRear = this->mBufferQueue.mArray;
        }
        break;
    default:
        // no other init required
        break;
    }

    // used to store the data source of our audio player
    this->mDynamicSource.mDataSource = pAudioSrc;
#ifdef USE_SNDFILE
    this->mSndFile.mPathname = pathname;
    this->mSndFile.mIs0 = SL_BOOLEAN_TRUE;
#ifndef NDEBUG
    this->mSndFile.mSNDFILE = NULL;
    this->mSndFile.mRetryBuffer = NULL;
    this->mSndFile.mRetrySize = 0;
#endif
#endif // USE_SNDFILE
#ifdef USE_OUTPUTMIXEXT
    // link track to player (NOT for Android!!)
    track->mDfPcm = df_pcm;
    track->mBufferQueue = &this->mBufferQueue;
    track->mPlay = &this->mPlay;
    // next 2 fields must be initialized explicitly (not part of this)
    track->mReader = NULL;
    track->mAvail = 0;
#endif
#ifdef USE_ANDROID
    sles_to_android_audioPlayerCreate(pAudioSrc, pAudioSnk, this);
#endif
    // return the new audio player object
    *pPlayer = &this->mObject.mItf;
    return SL_RESULT_SUCCESS;
}

static SLresult IEngine_CreateAudioRecorder(SLEngineItf self,
    SLObjectItf *pRecorder, SLDataSource *pAudioSrc, SLDataSink *pAudioSnk,
    SLuint32 numInterfaces, const SLInterfaceID *pInterfaceIds,
    const SLboolean *pInterfaceRequired)
{
    if (NULL == pRecorder)
        return SL_RESULT_PARAMETER_INVALID;
    *pRecorder = NULL;
    unsigned exposedMask;
    SLresult result = checkInterfaces(&CAudioRecorder_class, numInterfaces,
        pInterfaceIds, pInterfaceRequired, &exposedMask);
    if (SL_RESULT_SUCCESS != result)
        return result;
    return SL_RESULT_SUCCESS;
}

static SLresult IEngine_CreateMidiPlayer(SLEngineItf self, SLObjectItf *pPlayer,
    SLDataSource *pMIDISrc, SLDataSource *pBankSrc, SLDataSink *pAudioOutput,
    SLDataSink *pVibra, SLDataSink *pLEDArray, SLuint32 numInterfaces,
    const SLInterfaceID *pInterfaceIds, const SLboolean *pInterfaceRequired)
{
    if (NULL == pPlayer)
        return SL_RESULT_PARAMETER_INVALID;
    *pPlayer = NULL;
    unsigned exposedMask;
    SLresult result = checkInterfaces(&CMidiPlayer_class, numInterfaces,
        pInterfaceIds, pInterfaceRequired, &exposedMask);
    if (SL_RESULT_SUCCESS != result)
        return result;
    if (NULL == pMIDISrc || NULL == pAudioOutput)
        return SL_RESULT_PARAMETER_INVALID;
    CMidiPlayer *this = (CMidiPlayer *)
        construct(&CMidiPlayer_class, exposedMask, self);
    if (NULL == this)
        return SL_RESULT_MEMORY_FAILURE;
    // return the new MIDI player object
    *pPlayer = &this->mObject.mItf;
    return SL_RESULT_SUCCESS;
}

static SLresult IEngine_CreateListener(SLEngineItf self, SLObjectItf *pListener,
    SLuint32 numInterfaces, const SLInterfaceID *pInterfaceIds,
    const SLboolean *pInterfaceRequired)
{
    if (NULL == pListener)
        return SL_RESULT_PARAMETER_INVALID;
    *pListener = NULL;
    unsigned exposedMask;
    SLresult result = checkInterfaces(&CListener_class, numInterfaces,
        pInterfaceIds, pInterfaceRequired, &exposedMask);
    if (SL_RESULT_SUCCESS != result)
        return result;
    return SL_RESULT_FEATURE_UNSUPPORTED;
}

static SLresult IEngine_Create3DGroup(SLEngineItf self, SLObjectItf *pGroup,
    SLuint32 numInterfaces, const SLInterfaceID *pInterfaceIds,
    const SLboolean *pInterfaceRequired)
{
    if (NULL == pGroup)
        return SL_RESULT_PARAMETER_INVALID;
    *pGroup = NULL;
    unsigned exposedMask;
    SLresult result = checkInterfaces(&C3DGroup_class, numInterfaces,
        pInterfaceIds, pInterfaceRequired, &exposedMask);
    if (SL_RESULT_SUCCESS != result)
        return result;
    return SL_RESULT_FEATURE_UNSUPPORTED;
}

static SLresult IEngine_CreateOutputMix(SLEngineItf self, SLObjectItf *pMix,
    SLuint32 numInterfaces, const SLInterfaceID *pInterfaceIds,
    const SLboolean *pInterfaceRequired)
{
    if (NULL == pMix)
        return SL_RESULT_PARAMETER_INVALID;
    *pMix = NULL;
    unsigned exposedMask;
    SLresult result = checkInterfaces(&COutputMix_class, numInterfaces,
        pInterfaceIds, pInterfaceRequired, &exposedMask);
    if (SL_RESULT_SUCCESS != result)
        return result;
    COutputMix *this = (COutputMix *)
        construct(&COutputMix_class, exposedMask, self);
    if (NULL == this)
        return SL_RESULT_MEMORY_FAILURE;
    *pMix = &this->mObject.mItf;
    return SL_RESULT_SUCCESS;
}

static SLresult IEngine_CreateMetadataExtractor(SLEngineItf self,
    SLObjectItf *pMetadataExtractor, SLDataSource *pDataSource,
    SLuint32 numInterfaces, const SLInterfaceID *pInterfaceIds,
    const SLboolean *pInterfaceRequired)
{
    if (NULL == pMetadataExtractor)
        return SL_RESULT_PARAMETER_INVALID;
    *pMetadataExtractor = NULL;
    unsigned exposedMask;
    SLresult result = checkInterfaces(&CMetadataExtractor_class, numInterfaces,
        pInterfaceIds, pInterfaceRequired, &exposedMask);
    if (SL_RESULT_SUCCESS != result)
        return result;
    CMetadataExtractor *this = (CMetadataExtractor *)
        construct(&CMetadataExtractor_class, exposedMask, self);
    if (NULL == this)
        return SL_RESULT_MEMORY_FAILURE;
    *pMetadataExtractor = &this->mObject.mItf;
    return SL_RESULT_SUCCESS;
}

static SLresult IEngine_CreateExtensionObject(SLEngineItf self,
    SLObjectItf *pObject, void *pParameters, SLuint32 objectID,
    SLuint32 numInterfaces, const SLInterfaceID *pInterfaceIds,
    const SLboolean *pInterfaceRequired)
{
    if (NULL == pObject)
        return SL_RESULT_PARAMETER_INVALID;
    *pObject = NULL;
    return SL_RESULT_FEATURE_UNSUPPORTED;
}

static SLresult IEngine_QueryNumSupportedInterfaces(SLEngineItf self,
    SLuint32 objectID, SLuint32 *pNumSupportedInterfaces)
{
    if (NULL == pNumSupportedInterfaces)
        return SL_RESULT_PARAMETER_INVALID;
    const ClassTable *class__ = objectIDtoClass(objectID);
    if (NULL == class__)
        return SL_RESULT_FEATURE_UNSUPPORTED;
    *pNumSupportedInterfaces = class__->mInterfaceCount;
    return SL_RESULT_SUCCESS;
}

static SLresult IEngine_QuerySupportedInterfaces(SLEngineItf self,
    SLuint32 objectID, SLuint32 index, SLInterfaceID *pInterfaceId)
{
    if (NULL == pInterfaceId)
        return SL_RESULT_PARAMETER_INVALID;
    const ClassTable *class__ = objectIDtoClass(objectID);
    if (NULL == class__)
        return SL_RESULT_FEATURE_UNSUPPORTED;
    if (index >= class__->mInterfaceCount)
        return SL_RESULT_PARAMETER_INVALID;
    *pInterfaceId = &SL_IID_array[class__->mInterfaces[index].mMPH];
    return SL_RESULT_SUCCESS;
};

static SLresult IEngine_QueryNumSupportedExtensions(SLEngineItf self,
    SLuint32 *pNumExtensions)
{
    if (NULL == pNumExtensions)
        return SL_RESULT_PARAMETER_INVALID;
    *pNumExtensions = 0;
    return SL_RESULT_SUCCESS;
}

static SLresult IEngine_QuerySupportedExtension(SLEngineItf self,
    SLuint32 index, SLchar *pExtensionName, SLint16 *pNameLength)
{
    // any index >= 0 will be >= number of supported extensions
    return SL_RESULT_PARAMETER_INVALID;
}

static SLresult IEngine_IsExtensionSupported(SLEngineItf self,
    const SLchar *pExtensionName, SLboolean *pSupported)
{
    if (NULL == pExtensionName || NULL == pSupported)
        return SL_RESULT_PARAMETER_INVALID;
    *pSupported = SL_BOOLEAN_FALSE;
    return SL_RESULT_SUCCESS;
}

static const struct SLEngineItf_ IEngine_Itf = {
    IEngine_CreateLEDDevice,
    IEngine_CreateVibraDevice,
    IEngine_CreateAudioPlayer,
    IEngine_CreateAudioRecorder,
    IEngine_CreateMidiPlayer,
    IEngine_CreateListener,
    IEngine_Create3DGroup,
    IEngine_CreateOutputMix,
    IEngine_CreateMetadataExtractor,
    IEngine_CreateExtensionObject,
    IEngine_QueryNumSupportedInterfaces,
    IEngine_QuerySupportedInterfaces,
    IEngine_QueryNumSupportedExtensions,
    IEngine_QuerySupportedExtension,
    IEngine_IsExtensionSupported
};

void IEngine_init(void *self)
{
    IEngine *this = (IEngine *) self;
    this->mItf = &IEngine_Itf;
    // mLossOfControlGlobal is initialized in CreateEngine
#ifndef NDEBUG
    this->mInstanceCount = 0;
    unsigned i;
    for (i = 0; i < INSTANCE_MAX; ++i)
        this->mInstances[i] = NULL;
#endif
}
