/*  This file is part of the KDE project.

    Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

    This library is free software: you can redistribute it and/or modify

    it under the terms of the GNU Lesser General Public License as published by

    the Free Software Foundation, either version 2.1 or 3 of the License.

    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 Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License

    along with this library.  If not, see <http://www.gnu.org/licenses/>.

*/

#include "quicktimeaudioplayer.h"

#include "quicktimevideoplayer.h"

#include "audiograph.h"

#include "medianodeevent.h"

#include "medianode.h"

QT_BEGIN_NAMESPACE

namespace Phonon

{

namespace QT7

{

QuickTimeAudioPlayer::QuickTimeAudioPlayer() : AudioNode(0, 1)

{

    m_state = NoMedia;

    m_videoPlayer = 0;

    m_audioChannelLayout = 0;

    m_sliceList = 0;

    m_sliceCount = 30;

    m_maxExtractionPacketCount = 4096;

    m_audioExtractionComplete = false;

    m_audioEnabled = true;

    m_samplesRemaining = -1;

    m_startTime = 0;

    m_sampleTimeStamp = 0;

    m_audioUnitIsReset = true;

#ifdef QUICKTIME_C_API_AVAILABLE

    m_audioExtractionRef = 0;

#endif

}

QuickTimeAudioPlayer::~QuickTimeAudioPlayer()

{

    unsetVideoPlayer();

}

void QuickTimeAudioPlayer::unsetVideoPlayer()

{

    if (m_audioUnit){

        OSStatus err = AudioUnitReset(m_audioUnit, kAudioUnitScope_Global, 0);

        BACKEND_ASSERT2(err == noErr, "Could not reset audio player unit when unsetting movie", FATAL_ERROR)

    }

#ifdef QUICKTIME_C_API_AVAILABLE

    if (m_audioExtractionRef && m_videoPlayer && m_videoPlayer->hasMovie())

         MovieAudioExtractionEnd(m_audioExtractionRef);

    m_audioExtractionRef = 0;

#endif

    if (m_audioChannelLayout){

        free(m_audioChannelLayout);

        m_audioChannelLayout = 0;

    }

    if (m_sliceList){

        for (int i=0; i<m_sliceCount; i++)

	        free(m_sliceList[i].mBufferList);

        free(m_sliceList);

        m_sliceList = 0;

    }

    m_videoPlayer = 0;

    m_audioExtractionComplete = false;

    m_samplesRemaining = -1;

    m_sampleTimeStamp = 0;

    m_state = NoMedia;

}

void QuickTimeAudioPlayer::enableAudio(bool enable)

{

    // Remember to seek after enabling audio.

    if (enable == m_audioEnabled)

        return;

    m_audioEnabled = enable;

    if (!enable)

        flush();

}

bool QuickTimeAudioPlayer::audioEnabled()

{

    return m_audioEnabled;

}

void QuickTimeAudioPlayer::setVideoPlayer(QuickTimeVideoPlayer *videoPlayer)

{

    unsetVideoPlayer();

    if (videoPlayer && videoPlayer->hasMovie()){

        m_videoPlayer = videoPlayer;

        initSoundExtraction();

        allocateSoundSlices();

        m_state = Paused;

        seek(0);

    }

}

QuickTimeVideoPlayer *QuickTimeAudioPlayer::videoPlayer()

{

    return m_videoPlayer;

}

void QuickTimeAudioPlayer::scheduleAudioToGraph()

{

    if (!m_videoPlayer || !m_audioEnabled || m_audioExtractionComplete || m_state != Playing)

        return;

    // Schedule audio slices, and detect if everything went OK.

    // If not, flag the need for another audio system, but let

    // the end app know about it:

    gClearError();

    scheduleSoundSlices();    

    if (gGetErrorType() != NO_ERROR){

        gClearError();

        if (m_audioGraph)

            m_audioGraph->setStatusCannotPlay();

    }

}

void QuickTimeAudioPlayer::flush()

{

    // Empty scheduled audio data, so playback

    // will stop. Call seek to refill data again.

    if (m_audioUnit){

        m_startTime = currentTime();

        OSStatus err = AudioUnitReset(m_audioUnit, kAudioUnitScope_Global, 0);

        BACKEND_ASSERT2(err == noErr, "Could not reset audio player unit on pause", FATAL_ERROR)

        m_audioUnitIsReset = true;

    }

}

void QuickTimeAudioPlayer::pause()

{

    m_state = Paused;

    flush();

}

void QuickTimeAudioPlayer::play()

{

    m_state = Playing;

    if (!m_audioEnabled)

        return;

    if (m_audioUnitIsReset)

        seek(m_startTime);

    else

        scheduleAudioToGraph();

}

bool QuickTimeAudioPlayer::isPlaying()

{

    return m_videoPlayer && m_state == Playing;

}

void QuickTimeAudioPlayer::seek(quint64 milliseconds)

{

    if (!m_videoPlayer || !m_videoPlayer->hasMovie())

        return;    

    if (milliseconds > m_videoPlayer->duration())

        milliseconds = m_videoPlayer->duration();

    if (!m_audioUnitIsReset && milliseconds == currentTime())

        return;

    m_startTime = milliseconds;

    // Since the graph may be running (advancing time), there is

    // no point in seeking if were not going to play immidiatly:

    if (m_state != Playing)

        return;

    if (!m_audioUnit)

        return;

    if (!m_audioEnabled || !m_videoPlayer->isSeekable())

        return;

    // Reset (and stop playing):

    OSStatus err;

    if (!m_audioUnitIsReset){

        err = AudioUnitReset(m_audioUnit, kAudioUnitScope_Global, 0);

        BACKEND_ASSERT2(err == noErr, "Could not reset audio player unit before seek", FATAL_ERROR)

    }

    m_sampleTimeStamp = 0;

    for (int i = 0; i < m_sliceCount; i++)

	    m_sliceList[i].mFlags = kScheduledAudioSliceFlag_Complete;

    // Start to play again immidiatly:

    AudioTimeStamp timeStamp;

    memset(&timeStamp, 0, sizeof(timeStamp));

	timeStamp.mFlags = kAudioTimeStampSampleTimeValid;

    timeStamp.mSampleTime = -1;

	err = AudioUnitSetProperty(m_audioUnit,

        kAudioUnitProperty_ScheduleStartTimeStamp, kAudioUnitScope_Global,

        0, &timeStamp, sizeof(timeStamp));

    BACKEND_ASSERT2(err == noErr, "Could not set schedule start time stamp on audio player unit", FATAL_ERROR)

    // Seek back to 'now' in the movie:

    TimeRecord timeRec;

	timeRec.scale = m_videoPlayer->timeScale();

    timeRec.base = 0;

	timeRec.value.hi = 0;

	timeRec.value.lo = (milliseconds / 1000.0f) * timeRec.scale;

#ifdef QUICKTIME_C_API_AVAILABLE

	err = MovieAudioExtractionSetProperty(m_audioExtractionRef,

        kQTPropertyClass_MovieAudioExtraction_Movie,

        kQTMovieAudioExtractionMoviePropertyID_CurrentTime,

        sizeof(TimeRecord), &timeRec);

    BACKEND_ASSERT2(err == noErr, "Could not set current time on audio player unit", FATAL_ERROR)

#endif

    float durationLeftSec = float(m_videoPlayer->duration() - milliseconds) / 1000.0f;

    m_samplesRemaining = (durationLeftSec > 0) ? (durationLeftSec * m_audioStreamDescription.mSampleRate) : -1;

    m_audioExtractionComplete = false;

    m_audioUnitIsReset = false;    

    scheduleAudioToGraph();

}

quint64 QuickTimeAudioPlayer::currentTime()

{

    if (!m_audioUnit){

        if (m_videoPlayer)

            return m_videoPlayer->currentTime();

        else

            return m_startTime;

    }

    Float64 currentUnitTime = getTimeInSamples(kAudioUnitProperty_CurrentPlayTime);

    if (currentUnitTime == -1)

        currentUnitTime = 0;

    quint64 cTime = quint64(m_startTime +

        float(currentUnitTime / float(m_audioStreamDescription.mSampleRate)) * 1000.0f);

    return (m_videoPlayer && cTime > m_videoPlayer->duration()) ? m_videoPlayer->duration() : cTime;

}

QString QuickTimeAudioPlayer::currentTimeString()

{

    return QuickTimeVideoPlayer::timeToString(currentTime());

}

bool QuickTimeAudioPlayer::hasAudio()

{

    if (!m_videoPlayer)

        return false;

    return m_videoPlayer->hasAudio();

}

bool QuickTimeAudioPlayer::soundPlayerIsAwailable()

{

    QuickTimeAudioPlayer player;

    ComponentDescription d = player.getAudioNodeDescription();

    return FindNextComponent(0, &d);

}

ComponentDescription QuickTimeAudioPlayer::getAudioNodeDescription() const

{

	ComponentDescription description;

	description.componentType = kAudioUnitType_Generator;

	description.componentSubType = kAudioUnitSubType_ScheduledSoundPlayer;

	description.componentManufacturer = kAudioUnitManufacturer_Apple;

	description.componentFlags = 0;

	description.componentFlagsMask = 0;

    return description;

}

void QuickTimeAudioPlayer::initializeAudioUnit()

{

}

bool QuickTimeAudioPlayer::fillInStreamSpecification(AudioConnection *connection, ConnectionSide side)

{

    if (!m_videoPlayer){

        if (side == Source)

            DEBUG_AUDIO_STREAM("QuickTimeAudioPlayer" << int(this) << "is source, but has no movie to use for stream spec fill.")

        return true;

    }

    if (side == Source){

        DEBUG_AUDIO_STREAM("QuickTimeAudioPlayer" << int(this) << "is source, and fills in stream spec from movie.")

        connection->m_sourceStreamDescription = m_audioStreamDescription;

        connection->m_sourceChannelLayout = (AudioChannelLayout *) malloc(m_audioChannelLayoutSize);

        memcpy(connection->m_sourceChannelLayout, m_audioChannelLayout, m_audioChannelLayoutSize);

        connection->m_sourceChannelLayoutSize = m_audioChannelLayoutSize;

        connection->m_hasSourceSpecification = true;

    }

    return true;

}

long QuickTimeAudioPlayer::regularTaskFrequency(){

    if (!m_audioEnabled || !m_audioUnit || (m_audioGraph && m_audioGraph->graphCannotPlay()))

        return INT_MAX;

    // Calculate how much audio in

    // milliseconds our slices can hold:

    int packetNeedPerSecond = m_audioStreamDescription.mSampleRate / m_maxExtractionPacketCount;

    long bufferTimeLengthSec = float(m_sliceCount) / float(packetNeedPerSecond);

    // Make sure we also get some time to fill the

    // buffer, so divide the time by two:

    return (bufferTimeLengthSec * (1000 / 2));

}

void QuickTimeAudioPlayer::initSoundExtraction()

{

#ifdef QUICKTIME_C_API_AVAILABLE

    // Initilize the extraction:

	OSStatus err = noErr;

	err = MovieAudioExtractionBegin([m_videoPlayer->qtMovie() quickTimeMovie], 0, &m_audioExtractionRef);

    BACKEND_ASSERT2(err == noErr, "Could not start audio extraction on audio player unit", FATAL_ERROR)

	m_discrete = false;

#if 0

    // Extract all channels as descrete:

    err = MovieAudioExtractionSetProperty(audioExtractionRef,

        kQTPropertyClass_MovieAudioExtraction_Movie,

        kQTMovieAudioExtractionMoviePropertyID_AllChannelsDiscrete,

        sizeof (discrete),

        &discrete);

    BACKEND_ASSERT2(err == noErr, "Could not set channels discrete on audio player unit", FATAL_ERROR)

#endif

	// Get the size of the audio channel layout (may include offset):

	err = MovieAudioExtractionGetPropertyInfo(m_audioExtractionRef,

	    kQTPropertyClass_MovieAudioExtraction_Audio,

        kQTMovieAudioExtractionAudioPropertyID_AudioChannelLayout,

        0, &m_audioChannelLayoutSize, 0);

    BACKEND_ASSERT2(err == noErr, "Could not get channel layout size from audio extraction", FATAL_ERROR)

	// Allocate memory for the layout

	m_audioChannelLayout = (AudioChannelLayout *) calloc(1, m_audioChannelLayoutSize);

    BACKEND_ASSERT2(m_audioChannelLayout, "Could not allocate memory for channel layout on audio player unit", FATAL_ERROR)

	// Get the layout:

	err = MovieAudioExtractionGetProperty(m_audioExtractionRef,

	    kQTPropertyClass_MovieAudioExtraction_Audio,

		kQTMovieAudioExtractionAudioPropertyID_AudioChannelLayout,

		m_audioChannelLayoutSize, m_audioChannelLayout, 0);

    BACKEND_ASSERT2(err == noErr, "Could not get channel layout from audio extraction", FATAL_ERROR)

	// Get audio stream description:

	err = MovieAudioExtractionGetProperty(m_audioExtractionRef,

        kQTPropertyClass_MovieAudioExtraction_Audio,

        kQTMovieAudioExtractionAudioPropertyID_AudioStreamBasicDescription,

        sizeof(m_audioStreamDescription), &m_audioStreamDescription, 0);

    BACKEND_ASSERT2(err == noErr, "Could not get audio stream description from audio extraction", FATAL_ERROR)

#endif // QUICKTIME_C_API_AVAILABLE

}

void QuickTimeAudioPlayer::allocateSoundSlices()

{

#ifdef QUICKTIME_C_API_AVAILABLE

    // m_sliceList will contain a specified number of ScheduledAudioSlice-s that each can

    // carry audio from extraction, and be scheduled for playback at an audio unit.

    // Each ScheduledAudioSlice will contain several audio buffers, one for each sound channel.

    // Each buffer will carry (at most) a specified number of sound packets, and each packet can

    // contain one or more frames.

    // Create a list of ScheduledAudioSlices:

	m_sliceList = (ScheduledAudioSlice *) calloc(m_sliceCount, sizeof(ScheduledAudioSlice));

    BACKEND_ASSERT2(m_sliceList, "Could not allocate memory for audio slices", FATAL_ERROR)

	bzero(m_sliceList, m_sliceCount * sizeof(ScheduledAudioSlice));

    // Calculate the size of the different structures needed:

	int packetsBufferSize = m_maxExtractionPacketCount * m_audioStreamDescription.mBytesPerPacket;

    int channels = m_audioStreamDescription.mChannelsPerFrame;

	int audioBufferListSize = int(sizeof(AudioBufferList) + (channels-1) * sizeof(AudioBuffer));

	int mallocSize = audioBufferListSize + (packetsBufferSize * m_audioStreamDescription.mChannelsPerFrame);

    // Round off to Altivec sizes:

    packetsBufferSize = int(((packetsBufferSize + 15) / 16) * 16);

    audioBufferListSize = int(((audioBufferListSize + 15) / 16) * 16);

 	for (int sliceIndex = 0; sliceIndex < m_sliceCount; ++sliceIndex){

        // Create the memory chunk for this audio slice:

		AudioBufferList	*audioBufferList = (AudioBufferList*) calloc(1, mallocSize);

        BACKEND_ASSERT2(audioBufferList, "Could not allocate memory for audio buffer list", FATAL_ERROR)

        // The AudioBufferList contains an AudioBuffer for each channel in the audio stream:

		audioBufferList->mNumberBuffers = m_audioStreamDescription.mChannelsPerFrame;

		for (uint i = 0; i < audioBufferList->mNumberBuffers; ++i){

			audioBufferList->mBuffers[i].mNumberChannels = 1;

			audioBufferList->mBuffers[i].mData = (char *) audioBufferList + audioBufferListSize + (i * packetsBufferSize);

			audioBufferList->mBuffers[i].mDataByteSize = packetsBufferSize;

		}

		m_sliceList[sliceIndex].mBufferList = audioBufferList;

		m_sliceList[sliceIndex].mNumberFrames = m_maxExtractionPacketCount;

		m_sliceList[sliceIndex].mTimeStamp.mFlags = kAudioTimeStampSampleTimeValid;

		m_sliceList[sliceIndex].mCompletionProcUserData = 0;

		m_sliceList[sliceIndex].mCompletionProc = 0;

		m_sliceList[sliceIndex].mFlags = kScheduledAudioSliceFlag_Complete;

		m_sliceList[sliceIndex].mReserved = 0;

	}

#endif // QUICKTIME_C_API_AVAILABLE

}

void QuickTimeAudioPlayer::scheduleSoundSlices()

{

#ifdef QUICKTIME_C_API_AVAILABLE

    PhononAutoReleasePool pool;

	// For each completed (or never used) slice, fill and schedule it.

	for (int sliceIndex = 0; sliceIndex < m_sliceCount; ++sliceIndex){

		if (m_sliceList[sliceIndex].mFlags & kScheduledAudioSliceFlag_Complete){

			if (m_samplesRemaining == 0)

				m_audioExtractionComplete = true;

			if (!m_audioExtractionComplete){

			    // Determine how many samples to read:

				int samplesCount = m_samplesRemaining;

				if ((samplesCount > m_maxExtractionPacketCount) || (samplesCount == -1))

					samplesCount = m_maxExtractionPacketCount;

				m_sliceList[sliceIndex].mTimeStamp.mSampleTime = m_sampleTimeStamp;

	            // Reset buffer sizes:

	            int byteSize = samplesCount * m_audioStreamDescription.mBytesPerPacket;

	            for (uint i = 0; i < m_sliceList[sliceIndex].mBufferList->mNumberBuffers; ++i)

                    m_sliceList[sliceIndex].mBufferList->mBuffers[i].mDataByteSize = byteSize;

	            // Do the extraction:

                UInt32 flags = 0;

                UInt32 samplesRead = samplesCount;

	            OSStatus err = MovieAudioExtractionFillBuffer(

	                m_audioExtractionRef, &samplesRead, m_sliceList[sliceIndex].mBufferList, &flags);

                BACKEND_ASSERT2(err == noErr, "Could not fill audio buffers from audio extraction", FATAL_ERROR)

	            m_audioExtractionComplete = (flags & kQTMovieAudioExtractionComplete);

	            // Play the slice:

	            if (samplesRead != 0 && m_audioUnit != 0){

                    m_sliceList[sliceIndex].mNumberFrames = samplesRead;

                    err = AudioUnitSetProperty(m_audioUnit,

                        kAudioUnitProperty_ScheduleAudioSlice, kAudioUnitScope_Global,

                        0, &m_sliceList[sliceIndex], sizeof(ScheduledAudioSlice));

                    BACKEND_ASSERT2(err == noErr, "Could not schedule audio buffers on audio unit", FATAL_ERROR)

 	            } else

					m_sliceList[sliceIndex].mFlags = kScheduledAudioSliceFlag_Complete;

                // Move the window:

				m_sampleTimeStamp += samplesRead;

				if (m_samplesRemaining != -1)

					m_samplesRemaining -= samplesRead;

			}

		}

	}

#endif // QUICKTIME_C_API_AVAILABLE

}

void QuickTimeAudioPlayer::mediaNodeEvent(const MediaNodeEvent *event)

{

    switch (event->type()){

        case MediaNodeEvent::AudioGraphAboutToBeDeleted:

        case MediaNodeEvent::AboutToRestartAudioStream:

        case MediaNodeEvent::StartConnectionChange:

            m_startTime = currentTime();

            break;

        case MediaNodeEvent::AudioGraphInitialized:

        case MediaNodeEvent::RestartAudioStreamRequest:

        case MediaNodeEvent::EndConnectionChange:

            if (m_state == Playing)

                seek(m_startTime);

            break;

       default:

            break;

    }

}

}}

QT_END_NAMESPACE