- initial version
git-svn-id: http://moon:8086/svn/software/trunk/projects/RBM@14 b431acfa-c32f-4a4a-93f1-934dc6c82436
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/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2013 - Raw Material Software Ltd.
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Permission is granted to use this software under the terms of either:
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a) the GPL v2 (or any later version)
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b) the Affero GPL v3
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Details of these licenses can be found at: www.gnu.org/licenses
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JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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------------------------------------------------------------------------------
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To release a closed-source product which uses JUCE, commercial licenses are
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available: visit www.juce.com for more information.
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==============================================================================
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*/
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namespace CDReaderHelpers
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{
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inline const XmlElement* getElementForKey (const XmlElement& xml, const String& key)
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{
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forEachXmlChildElementWithTagName (xml, child, "key")
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if (child->getAllSubText().trim() == key)
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return child->getNextElement();
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return nullptr;
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}
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static int getIntValueForKey (const XmlElement& xml, const String& key, int defaultValue = -1)
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{
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const XmlElement* const block = getElementForKey (xml, key);
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return block != nullptr ? block->getAllSubText().trim().getIntValue() : defaultValue;
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}
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// Get the track offsets for a CD given an XmlElement representing its TOC.Plist.
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// Returns NULL on success, otherwise a const char* representing an error.
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static const char* getTrackOffsets (XmlDocument& xmlDocument, Array<int>& offsets)
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{
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const ScopedPointer<XmlElement> xml (xmlDocument.getDocumentElement());
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if (xml == nullptr)
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return "Couldn't parse XML in file";
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const XmlElement* const dict = xml->getChildByName ("dict");
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if (dict == nullptr)
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return "Couldn't get top level dictionary";
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const XmlElement* const sessions = getElementForKey (*dict, "Sessions");
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if (sessions == nullptr)
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return "Couldn't find sessions key";
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const XmlElement* const session = sessions->getFirstChildElement();
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if (session == nullptr)
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return "Couldn't find first session";
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const int leadOut = getIntValueForKey (*session, "Leadout Block");
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if (leadOut < 0)
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return "Couldn't find Leadout Block";
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const XmlElement* const trackArray = getElementForKey (*session, "Track Array");
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if (trackArray == nullptr)
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return "Couldn't find Track Array";
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forEachXmlChildElement (*trackArray, track)
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{
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const int trackValue = getIntValueForKey (*track, "Start Block");
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if (trackValue < 0)
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return "Couldn't find Start Block in the track";
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offsets.add (trackValue * AudioCDReader::samplesPerFrame - 88200);
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}
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offsets.add (leadOut * AudioCDReader::samplesPerFrame - 88200);
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return nullptr;
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}
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static void findDevices (Array<File>& cds)
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{
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File volumes ("/Volumes");
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volumes.findChildFiles (cds, File::findDirectories, false);
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for (int i = cds.size(); --i >= 0;)
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if (! cds.getReference(i).getChildFile (".TOC.plist").exists())
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cds.remove (i);
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}
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struct TrackSorter
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{
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static int getCDTrackNumber (const File& file)
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{
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return file.getFileName().initialSectionContainingOnly ("0123456789").getIntValue();
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}
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static int compareElements (const File& first, const File& second)
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{
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const int firstTrack = getCDTrackNumber (first);
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const int secondTrack = getCDTrackNumber (second);
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jassert (firstTrack > 0 && secondTrack > 0);
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return firstTrack - secondTrack;
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}
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};
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}
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//==============================================================================
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StringArray AudioCDReader::getAvailableCDNames()
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{
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Array<File> cds;
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CDReaderHelpers::findDevices (cds);
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StringArray names;
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for (int i = 0; i < cds.size(); ++i)
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names.add (cds.getReference(i).getFileName());
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return names;
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}
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AudioCDReader* AudioCDReader::createReaderForCD (const int index)
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{
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Array<File> cds;
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CDReaderHelpers::findDevices (cds);
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if (cds[index].exists())
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return new AudioCDReader (cds[index]);
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return nullptr;
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}
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AudioCDReader::AudioCDReader (const File& volume)
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: AudioFormatReader (0, "CD Audio"),
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volumeDir (volume),
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currentReaderTrack (-1),
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reader (0)
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{
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sampleRate = 44100.0;
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bitsPerSample = 16;
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numChannels = 2;
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usesFloatingPointData = false;
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refreshTrackLengths();
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}
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AudioCDReader::~AudioCDReader()
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{
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}
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void AudioCDReader::refreshTrackLengths()
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{
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tracks.clear();
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trackStartSamples.clear();
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lengthInSamples = 0;
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volumeDir.findChildFiles (tracks, File::findFiles | File::ignoreHiddenFiles, false, "*.aiff");
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CDReaderHelpers::TrackSorter sorter;
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tracks.sort (sorter);
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const File toc (volumeDir.getChildFile (".TOC.plist"));
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if (toc.exists())
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{
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XmlDocument doc (toc);
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const char* error = CDReaderHelpers::getTrackOffsets (doc, trackStartSamples);
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(void) error; // could be logged..
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lengthInSamples = trackStartSamples.getLast() - trackStartSamples.getFirst();
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}
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}
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bool AudioCDReader::readSamples (int** destSamples, int numDestChannels, int startOffsetInDestBuffer,
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int64 startSampleInFile, int numSamples)
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{
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while (numSamples > 0)
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{
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int track = -1;
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for (int i = 0; i < trackStartSamples.size() - 1; ++i)
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{
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if (startSampleInFile < trackStartSamples.getUnchecked (i + 1))
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{
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track = i;
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break;
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}
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}
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if (track < 0)
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return false;
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if (track != currentReaderTrack)
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{
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reader = nullptr;
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if (FileInputStream* const in = tracks [track].createInputStream())
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{
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BufferedInputStream* const bin = new BufferedInputStream (in, 65536, true);
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AiffAudioFormat format;
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reader = format.createReaderFor (bin, true);
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if (reader == nullptr)
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currentReaderTrack = -1;
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else
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currentReaderTrack = track;
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}
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}
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if (reader == nullptr)
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return false;
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const int startPos = (int) (startSampleInFile - trackStartSamples.getUnchecked (track));
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const int numAvailable = (int) jmin ((int64) numSamples, reader->lengthInSamples - startPos);
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reader->readSamples (destSamples, numDestChannels, startOffsetInDestBuffer, startPos, numAvailable);
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numSamples -= numAvailable;
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startSampleInFile += numAvailable;
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}
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return true;
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}
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bool AudioCDReader::isCDStillPresent() const
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{
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return volumeDir.exists();
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}
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void AudioCDReader::ejectDisk()
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{
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JUCE_AUTORELEASEPOOL
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{
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[[NSWorkspace sharedWorkspace] unmountAndEjectDeviceAtPath: juceStringToNS (volumeDir.getFullPathName())];
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}
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}
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bool AudioCDReader::isTrackAudio (int trackNum) const
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{
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return tracks [trackNum].hasFileExtension (".aiff");
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}
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void AudioCDReader::enableIndexScanning (bool)
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{
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// any way to do this on a Mac??
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}
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int AudioCDReader::getLastIndex() const
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{
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return 0;
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}
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Array<int> AudioCDReader::findIndexesInTrack (const int /*trackNumber*/)
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{
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return Array<int>();
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}
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