Example usage for javax.sound.sampled AudioFormat properties

Introduction

In this page you can find the example usage for javax.sound.sampled AudioFormat properties.

Prototype

HashMap properties

To view the source code for javax.sound.sampled AudioFormat properties.

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Document

The set of properties.

Usage

From source file:org.apache.tika.parser.audio.AudioParser.java

public void parse(InputStream stream, ContentHandler handler, Metadata metadata, ParseContext context)
        throws IOException, SAXException, TikaException {
    // AudioSystem expects the stream to support the mark feature
    if (!stream.markSupported()) {
        stream = new BufferedInputStream(stream);
    }/*from  w ww . ja  v  a2  s  . c om*/
    stream = new SkipFullyInputStream(stream);
    try {
        AudioFileFormat fileFormat = AudioSystem.getAudioFileFormat(stream);
        Type type = fileFormat.getType();
        if (type == Type.AIFC || type == Type.AIFF) {
            metadata.set(Metadata.CONTENT_TYPE, "audio/x-aiff");
        } else if (type == Type.AU || type == Type.SND) {
            metadata.set(Metadata.CONTENT_TYPE, "audio/basic");
        } else if (type == Type.WAVE) {
            metadata.set(Metadata.CONTENT_TYPE, "audio/vnd.wave");
        }

        AudioFormat audioFormat = fileFormat.getFormat();
        int channels = audioFormat.getChannels();
        if (channels != AudioSystem.NOT_SPECIFIED) {
            metadata.set("channels", String.valueOf(channels));
            // TODO: Use XMPDM.TRACKS? (see also frame rate in AudioFormat)
        }
        float rate = audioFormat.getSampleRate();
        if (rate != AudioSystem.NOT_SPECIFIED) {
            metadata.set("samplerate", String.valueOf(rate));
            metadata.set(XMPDM.AUDIO_SAMPLE_RATE, Integer.toString((int) rate));
        }
        int bits = audioFormat.getSampleSizeInBits();
        if (bits != AudioSystem.NOT_SPECIFIED) {
            metadata.set("bits", String.valueOf(bits));
            if (bits == 8) {
                metadata.set(XMPDM.AUDIO_SAMPLE_TYPE, "8Int");
            } else if (bits == 16) {
                metadata.set(XMPDM.AUDIO_SAMPLE_TYPE, "16Int");
            } else if (bits == 32) {
                metadata.set(XMPDM.AUDIO_SAMPLE_TYPE, "32Int");
            }
        }
        metadata.set("encoding", audioFormat.getEncoding().toString());

        // Javadoc suggests that some of the following properties might
        // be available, but I had no success in finding any:

        // "duration" Long playback duration of the file in microseconds
        // "author" String name of the author of this file
        // "title" String title of this file
        // "copyright" String copyright message
        // "date" Date date of the recording or release
        // "comment" String an arbitrary text

        addMetadata(metadata, fileFormat.properties());
        addMetadata(metadata, audioFormat.properties());
    } catch (UnsupportedAudioFileException e) {
        // There is no way to know whether this exception was
        // caused by the document being corrupted or by the format
        // just being unsupported. So we do nothing.
    }

    XHTMLContentHandler xhtml = new XHTMLContentHandler(handler, metadata);
    xhtml.startDocument();
    xhtml.endDocument();
}

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