JUCE/modules/juce_audio_formats/codecs/juce_QuickTimeAudioFormat.cpp

/*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2015 - ROLI Ltd.

   Permission is granted to use this software under the terms of either:
   a) the GPL v2 (or any later version)
   b) the Affero GPL v3

   Details of these licenses can be found at: www.gnu.org/licenses

   JUCE 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 General Public License for more details.

   ------------------------------------------------------------------------------

   To release a closed-source product which uses JUCE, commercial licenses are
   available: visit www.juce.com for more information.

  ==============================================================================
*/

#if JUCE_QUICKTIME && ! (JUCE_64BIT || JUCE_IOS)

} // (juce namespace)

#if ! JUCE_WINDOWS
 #include <QuickTime/Movies.h>
 #include <QuickTime/QTML.h>
 #include <QuickTime/QuickTimeComponents.h>
 #include <QuickTime/MediaHandlers.h>
 #include <QuickTime/ImageCodec.h>
#else
 #if JUCE_MSVC
  #pragma warning (push)
  #pragma warning (disable : 4100)
 #endif

 /* If you've got an include error here, you probably need to install the QuickTime SDK and
    add its header directory to your include path.

    Alternatively, if you don't need any QuickTime services, just set the JUCE_QUICKTIME flag to 0.
 */
 #undef SIZE_MAX
 #include <Movies.h>
 #include <QTML.h>
 #include <QuickTimeComponents.h>
 #include <MediaHandlers.h>
 #include <ImageCodec.h>
 #undef SIZE_MAX

 #if JUCE_MSVC
  #pragma warning (pop)
 #endif
#endif

namespace juce
{

bool juce_OpenQuickTimeMovieFromStream (InputStream* input, Movie& movie, Handle& dataHandle);

static const char* const quickTimeFormatName = "QuickTime file";

//==============================================================================
class QTAudioReader     : public AudioFormatReader
{
public:
    QTAudioReader (InputStream* const input_, const int trackNum_)
        : AudioFormatReader (input_, quickTimeFormatName),
          ok (false),
          movie (0),
          trackNum (trackNum_),
          lastSampleRead (0),
          lastThreadId (0),
          extractor (0),
          dataHandle (0)
    {
        JUCE_AUTORELEASEPOOL
        {
            bufferList.calloc (256, 1);

           #if JUCE_WINDOWS
            if (InitializeQTML (0) != noErr)
                return;
           #endif

            if (EnterMovies() != noErr)
                return;

            bool opened = juce_OpenQuickTimeMovieFromStream (input_, movie, dataHandle);

            if (! opened)
                return;

            {
                const int numTracks = GetMovieTrackCount (movie);
                int trackCount = 0;

                for (int i = 1; i <= numTracks; ++i)
                {
                    track = GetMovieIndTrack (movie, i);
                    media = GetTrackMedia (track);

                    OSType mediaType;
                    GetMediaHandlerDescription (media, &mediaType, 0, 0);

                    if (mediaType == SoundMediaType
                         && trackCount++ == trackNum_)
                    {
                        ok = true;
                        break;
                    }
                }
            }

            if (! ok)
                return;

            ok = false;

            lengthInSamples = GetMediaDecodeDuration (media);
            usesFloatingPointData = false;

            samplesPerFrame = (int) (GetMediaDecodeDuration (media) / GetMediaSampleCount (media));

            trackUnitsPerFrame = GetMovieTimeScale (movie) * samplesPerFrame
                                    / GetMediaTimeScale (media);

            MovieAudioExtractionBegin (movie, 0, &extractor);

            unsigned long output_layout_size;
            OSStatus err = MovieAudioExtractionGetPropertyInfo (extractor,
                                                                kQTPropertyClass_MovieAudioExtraction_Audio,
                                                                kQTMovieAudioExtractionAudioPropertyID_AudioChannelLayout,
                                                                0, &output_layout_size, 0);
            if (err != noErr)
                return;

            HeapBlock<AudioChannelLayout> qt_audio_channel_layout;
            qt_audio_channel_layout.calloc (output_layout_size, 1);

            MovieAudioExtractionGetProperty (extractor,
                                             kQTPropertyClass_MovieAudioExtraction_Audio,
                                             kQTMovieAudioExtractionAudioPropertyID_AudioChannelLayout,
                                             output_layout_size, qt_audio_channel_layout, 0);

            qt_audio_channel_layout[0].mChannelLayoutTag = kAudioChannelLayoutTag_Stereo;

            MovieAudioExtractionSetProperty (extractor,
                                             kQTPropertyClass_MovieAudioExtraction_Audio,
                                             kQTMovieAudioExtractionAudioPropertyID_AudioChannelLayout,
                                             output_layout_size,
                                             qt_audio_channel_layout);

            err = MovieAudioExtractionGetProperty (extractor,
                                                   kQTPropertyClass_MovieAudioExtraction_Audio,
                                                   kQTMovieAudioExtractionAudioPropertyID_AudioStreamBasicDescription,
                                                   sizeof (inputStreamDesc),
                                                   &inputStreamDesc, 0);
            if (err != noErr)
                return;

            inputStreamDesc.mFormatFlags = kAudioFormatFlagIsSignedInteger
                                            | kAudioFormatFlagIsPacked
                                            | kAudioFormatFlagsNativeEndian;
            inputStreamDesc.mBitsPerChannel = sizeof (SInt16) * 8;
            inputStreamDesc.mChannelsPerFrame = jmin ((UInt32) 2, inputStreamDesc.mChannelsPerFrame);
            inputStreamDesc.mBytesPerFrame = sizeof (SInt16) * inputStreamDesc.mChannelsPerFrame;
            inputStreamDesc.mBytesPerPacket = inputStreamDesc.mBytesPerFrame;

            err = MovieAudioExtractionSetProperty (extractor,
                                                   kQTPropertyClass_MovieAudioExtraction_Audio,
                                                   kQTMovieAudioExtractionAudioPropertyID_AudioStreamBasicDescription,
                                                   sizeof (inputStreamDesc),
                                                   &inputStreamDesc);
            if (err != noErr)
                return;

            Boolean allChannelsDiscrete = false;
            err = MovieAudioExtractionSetProperty (extractor,
                                                   kQTPropertyClass_MovieAudioExtraction_Movie,
                                                   kQTMovieAudioExtractionMoviePropertyID_AllChannelsDiscrete,
                                                   sizeof (allChannelsDiscrete),
                                                   &allChannelsDiscrete);

            if (err != noErr)
                return;

            bufferList->mNumberBuffers = 1;
            bufferList->mBuffers[0].mNumberChannels = inputStreamDesc.mChannelsPerFrame;
            bufferList->mBuffers[0].mDataByteSize =  jmax ((UInt32) 4096, (UInt32) (samplesPerFrame * (int) inputStreamDesc.mBytesPerFrame) + 16);

            dataBuffer.malloc (bufferList->mBuffers[0].mDataByteSize);
            bufferList->mBuffers[0].mData = dataBuffer;

            sampleRate = inputStreamDesc.mSampleRate;
            bitsPerSample = 16;
            numChannels = inputStreamDesc.mChannelsPerFrame;

            detachThread();
            ok = true;
        }
    }

    ~QTAudioReader()
    {
        JUCE_AUTORELEASEPOOL
        {
            checkThreadIsAttached();

            if (dataHandle != nullptr)
                DisposeHandle (dataHandle);

            if (extractor != nullptr)
            {
                MovieAudioExtractionEnd (extractor);
                extractor = nullptr;
            }

            DisposeMovie (movie);

           #if JUCE_MAC
            ExitMoviesOnThread();
           #endif
        }
    }

    bool readSamples (int** destSamples, int numDestChannels, int startOffsetInDestBuffer,
                      int64 startSampleInFile, int numSamples)
    {
        JUCE_AUTORELEASEPOOL
        {
            checkThreadIsAttached();
            bool readOk = true;

            while (numSamples > 0)
            {
                if (lastSampleRead != startSampleInFile)
                {
                    TimeRecord time;
                    time.scale = (TimeScale) inputStreamDesc.mSampleRate;
                    time.base = 0;
                    time.value.hi = 0;
                    time.value.lo = (UInt32) startSampleInFile;

                    OSStatus err = MovieAudioExtractionSetProperty (extractor,
                                                                    kQTPropertyClass_MovieAudioExtraction_Movie,
                                                                    kQTMovieAudioExtractionMoviePropertyID_CurrentTime,
                                                                    sizeof (time), &time);

                    if (err != noErr)
                    {
                        readOk = false;
                        break;
                    }
                }

                int framesToDo = jmin (numSamples, (int) (bufferList->mBuffers[0].mDataByteSize / inputStreamDesc.mBytesPerFrame));
                bufferList->mBuffers[0].mDataByteSize = inputStreamDesc.mBytesPerFrame * (UInt32) framesToDo;

                UInt32 outFlags = 0;
                UInt32 actualNumFrames = (UInt32) framesToDo;
                OSStatus err = MovieAudioExtractionFillBuffer (extractor, &actualNumFrames, bufferList, &outFlags);
                if (err != noErr)
                {
                    readOk = false;
                    break;
                }

                lastSampleRead = startSampleInFile + actualNumFrames;
                const int samplesReceived = (int) actualNumFrames;

                for (int j = numDestChannels; --j >= 0;)
                {
                    if (destSamples[j] != nullptr)
                    {
                        const short* src = ((const short*) bufferList->mBuffers[0].mData) + j;

                        for (int i = 0; i < samplesReceived; ++i)
                        {
                            destSamples[j][startOffsetInDestBuffer + i] = (*src << 16);
                            src += numChannels;
                        }
                    }
                }

                startOffsetInDestBuffer += samplesReceived;
                startSampleInFile += samplesReceived;
                numSamples -= samplesReceived;

                if (((outFlags & kQTMovieAudioExtractionComplete) != 0 || samplesReceived == 0) && numSamples > 0)
                {
                    for (int j = numDestChannels; --j >= 0;)
                        if (destSamples[j] != nullptr)
                            zeromem (destSamples[j] + startOffsetInDestBuffer, sizeof (int) * (size_t) numSamples);

                    break;
                }
            }

            detachThread();
            return readOk;
        }
    }

    bool ok;

private:
    Movie movie;
    Media media;
    Track track;
    const int trackNum;
    double trackUnitsPerFrame;
    int samplesPerFrame;
    int64 lastSampleRead;
    Thread::ThreadID lastThreadId;
    MovieAudioExtractionRef extractor;
    AudioStreamBasicDescription inputStreamDesc;
    HeapBlock<AudioBufferList> bufferList;
    HeapBlock<char> dataBuffer;
    Handle dataHandle;

    //==============================================================================
    void checkThreadIsAttached()
    {
       #if JUCE_MAC
        if (Thread::getCurrentThreadId() != lastThreadId)
            EnterMoviesOnThread (0);
        AttachMovieToCurrentThread (movie);
       #endif
    }

    void detachThread()
    {
       #if JUCE_MAC
        DetachMovieFromCurrentThread (movie);
       #endif
    }

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (QTAudioReader)
};


//==============================================================================
QuickTimeAudioFormat::QuickTimeAudioFormat()  : AudioFormat (quickTimeFormatName, ".mov .mp3 .mp4 .m4a")
{
}

QuickTimeAudioFormat::~QuickTimeAudioFormat()
{
}

Array<int> QuickTimeAudioFormat::getPossibleSampleRates()    { return Array<int>(); }
Array<int> QuickTimeAudioFormat::getPossibleBitDepths()      { return Array<int>(); }

bool QuickTimeAudioFormat::canDoStereo()    { return true; }
bool QuickTimeAudioFormat::canDoMono()      { return true; }

//==============================================================================
AudioFormatReader* QuickTimeAudioFormat::createReaderFor (InputStream* sourceStream,
                                                          const bool deleteStreamIfOpeningFails)
{
    ScopedPointer<QTAudioReader> r (new QTAudioReader (sourceStream, 0));

    if (r->ok)
        return r.release();

    if (! deleteStreamIfOpeningFails)
        r->input = 0;

    return nullptr;
}

AudioFormatWriter* QuickTimeAudioFormat::createWriterFor (OutputStream* /*streamToWriteTo*/,
                                                          double /*sampleRateToUse*/,
                                                          unsigned int /*numberOfChannels*/,
                                                          int /*bitsPerSample*/,
                                                          const StringPairArray& /*metadataValues*/,
                                                          int /*qualityOptionIndex*/)
{
    jassertfalse; // not yet implemented!
    return nullptr;
}

#endif