annotate data/fileio/AudioFileReaderFactory.cpp @ 308:14e0f60435b8

* Make it possible to drop audio files, layer files, session files and images
  onto SV panes.
  Need to do a bit more work on where we expect the dropped file to go,
  particularly in the case of audio files -- at the moment they're always
  opened in new panes, but it may be better to by default replace whatever is
  in the target pane.

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2006 Chris Cannam and QMUL.
    
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
    published by the Free Software Foundation; either version 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

#include "AudioFileReaderFactory.h"

#include "WavFileReader.h"
#include "ResamplingWavFileReader.h"
#include "OggVorbisFileReader.h"
#include "MP3FileReader.h"
#include "QuickTimeFileReader.h"

#include <QString>
#include <QFileInfo>
#include <iostream>

QString
AudioFileReaderFactory::getKnownExtensions()
{
    std::set<QString> extensions;

    WavFileReader::getSupportedExtensions(extensions);
#ifdef HAVE_MAD
    MP3FileReader::getSupportedExtensions(extensions);
#endif
#ifdef HAVE_OGGZ
#ifdef HAVE_FISHSOUND
    OggVorbisFileReader::getSupportedExtensions(extensions);
#endif
#endif
#ifdef HAVE_QUICKTIME
    QuickTimeFileReader::getSupportedExtensions(extensions);
#endif

    QString rv;
    for (std::set<QString>::const_iterator i = extensions.begin();
         i != extensions.end(); ++i) {
        if (i != extensions.begin()) rv += " ";
        rv += "*." + *i;
    }

    return rv;
}

AudioFileReader *
AudioFileReaderFactory::createReader(QString path, size_t targetRate)
{
    QString err;

    std::cerr << "AudioFileReaderFactory::createReader(\"" << path.toStdString() << "\"): Requested rate: " << targetRate << std::endl;

    AudioFileReader *reader = 0;

    // First try to construct a preferred reader based on the
    // extension.  If we can't identify one or it fails to load the
    // file, fall back to trying all readers in no particular order.

    QString ext = QFileInfo(path).suffix().toLower();
    std::set<QString> extensions;

    WavFileReader::getSupportedExtensions(extensions);
    if (extensions.find(ext) != extensions.end()) {
        reader = new WavFileReader(path);

        if (targetRate != 0 &&
            reader->isOK() &&
            reader->getSampleRate() != targetRate) {

            std::cerr << "AudioFileReaderFactory::createReader: WAV file rate: " << reader->getSampleRate() << ", creating resampling reader" << std::endl;

            delete reader;
            reader = new ResamplingWavFileReader
                (path,
                 ResamplingWavFileReader::ResampleThreaded,
                 ResamplingWavFileReader::CacheInTemporaryFile,
                 targetRate);
        }
    }
    
#ifdef HAVE_OGGZ
#ifdef HAVE_FISHSOUND
    if (!reader) {
        extensions.clear();
        OggVorbisFileReader::getSupportedExtensions(extensions);
        if (extensions.find(ext) != extensions.end()) {
            reader = new OggVorbisFileReader
                (path, 
                 OggVorbisFileReader::DecodeThreaded,
                 OggVorbisFileReader::CacheInTemporaryFile,
                 targetRate);
        }
    }
#endif
#endif

#ifdef HAVE_MAD
    if (!reader) {
        extensions.clear();
        MP3FileReader::getSupportedExtensions(extensions);
        if (extensions.find(ext) != extensions.end()) {
            reader = new MP3FileReader
                (path,
                 MP3FileReader::DecodeThreaded,
                 MP3FileReader::CacheInTemporaryFile,
                 targetRate);
        }
    }
#endif

#ifdef HAVE_QUICKTIME
    if (!reader) {
        extensions.clear();
        QuickTimeFileReader::getSupportedExtensions(extensions);
        if (extensions.find(ext) != extensions.end()) {
            reader = new QuickTimeFileReader
                (path,
                 QuickTimeFileReader::DecodeThreaded,
                 QuickTimeFileReader::CacheInTemporaryFile,
                 targetRate);
        }
    }
#endif

    if (reader) {
        if (reader->isOK()) return reader;
        if (reader->getError() != "") {
            std::cerr << "AudioFileReaderFactory: Preferred reader for "
                      << "extension \"" << ext.toStdString() << "\" failed: \""
                      << reader->getError().toStdString() << "\"" << std::endl;
        } else {
            std::cerr << "AudioFileReaderFactory: Preferred reader for "
                      << "extension \"" << ext.toStdString() << "\" failed"
                      << std::endl;
        }            
        delete reader;
        reader = 0;
    }

    return reader;
}