annotate data/fileio/OggVorbisFileReader.cpp @ 316:3a6725f285d6

* Make RemoteFile far more pervasive, and use it for local files as well
  so that we can handle both transparently.  Make it shallow copy with
  reference counting, so it can be used by value without having to worry
  about the cache file lifetime.  Use RemoteFile for MainWindow file-open
  functions, etc

/* -*- 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.
    
    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.
*/

#ifdef HAVE_OGGZ
#ifdef HAVE_FISHSOUND

#include "OggVorbisFileReader.h"
#include "base/Profiler.h"
#include "system/System.h"

#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <cmath>

#include <QApplication>
#include <QFileInfo>
#include <QProgressDialog>

static int instances = 0;

OggVorbisFileReader::OggVorbisFileReader(RemoteFile source,
                                         DecodeMode decodeMode,
                                         CacheMode mode,
                                         size_t targetRate) :
    CodedAudioFileReader(mode, targetRate),
    m_source(source),
    m_path(source.getLocalFilename()),
    m_progress(0),
    m_fileSize(0),
    m_bytesRead(0),
    m_commentsRead(false),
    m_cancelled(false),
    m_completion(0),
    m_decodeThread(0)
{
    m_channelCount = 0;
    m_fileRate = 0;

    std::cerr << "OggVorbisFileReader::OggVorbisFileReader(" << m_path.toLocal8Bit().data() << "): now have " << (++instances) << " instances" << std::endl;

    Profiler profiler("OggVorbisFileReader::OggVorbisFileReader", true);

    QFileInfo info(m_path);
    m_fileSize = info.size();

    if (!(m_oggz = oggz_open(m_path.toLocal8Bit().data(), OGGZ_READ))) {
	m_error = QString("File %1 is not an OGG file.").arg(m_path);
	return;
    }

    FishSoundInfo fsinfo;
    m_fishSound = fish_sound_new(FISH_SOUND_DECODE, &fsinfo);

    fish_sound_set_decoded_callback(m_fishSound, acceptFrames, this);
    oggz_set_read_callback(m_oggz, -1, readPacket, this);

    if (decodeMode == DecodeAtOnce) {

	m_progress = new QProgressDialog
	    (QObject::tr("Decoding %1...").arg(QFileInfo(m_path).fileName()),
	     QObject::tr("Stop"), 0, 100);
	m_progress->hide();

        while (oggz_read(m_oggz, 1024) > 0);
        
        fish_sound_delete(m_fishSound);
        m_fishSound = 0;
        oggz_close(m_oggz);
        m_oggz = 0;

        if (isDecodeCacheInitialised()) finishDecodeCache();

        delete m_progress;
        m_progress = 0;

    } else {

        while (oggz_read(m_oggz, 1024) > 0 &&
               m_channelCount == 0);

        if (m_channelCount > 0) {
            m_decodeThread = new DecodeThread(this);
            m_decodeThread->start();
        }
    }
}

OggVorbisFileReader::~OggVorbisFileReader()
{
    std::cerr << "OggVorbisFileReader::~OggVorbisFileReader(" << m_path.toLocal8Bit().data() << "): now have " << (--instances) << " instances" << std::endl;
    if (m_decodeThread) {
        m_cancelled = true;
        m_decodeThread->wait();
        delete m_decodeThread;
    }
}

void
OggVorbisFileReader::DecodeThread::run()
{
    if (m_reader->m_cacheMode == CacheInTemporaryFile) {
        m_reader->m_completion = 1;
        m_reader->startSerialised("OggVorbisFileReader::Decode");
    }

    while (oggz_read(m_reader->m_oggz, 1024) > 0);
        
    fish_sound_delete(m_reader->m_fishSound);
    m_reader->m_fishSound = 0;
    oggz_close(m_reader->m_oggz);
    m_reader->m_oggz = 0;
    
    if (m_reader->isDecodeCacheInitialised()) m_reader->finishDecodeCache();
    m_reader->m_completion = 100;

    m_reader->endSerialised();
} 

int
OggVorbisFileReader::readPacket(OGGZ *, ogg_packet *packet, long, void *data)
{
    OggVorbisFileReader *reader = (OggVorbisFileReader *)data;
    FishSound *fs = reader->m_fishSound;

    fish_sound_prepare_truncation(fs, packet->granulepos, packet->e_o_s);
    fish_sound_decode(fs, packet->packet, packet->bytes);

    reader->m_bytesRead += packet->bytes;

    // The number of bytes read by this function is smaller than
    // the file size because of the packet headers
    int progress = lrint(double(reader->m_bytesRead) * 114 /
                         double(reader->m_fileSize));
    if (progress > 99) progress = 99;
    reader->m_completion = progress;
    
    if (reader->m_fileSize > 0 && reader->m_progress) {
	if (progress > reader->m_progress->value()) {
	    reader->m_progress->setValue(progress);
	    reader->m_progress->show();
	    reader->m_progress->raise();
	    qApp->processEvents();
	    if (reader->m_progress->wasCanceled()) {
		reader->m_cancelled = true;
	    }
	}
    }

    if (reader->m_cancelled) return 1;
    return 0;
}

int
OggVorbisFileReader::acceptFrames(FishSound *fs, float **frames, long nframes,
				  void *data)
{
    OggVorbisFileReader *reader = (OggVorbisFileReader *)data;

    if (!reader->m_commentsRead) {
        const FishSoundComment *comment = fish_sound_comment_first_byname
            (fs, "TITLE");
        if (comment && comment->value) {
            reader->m_title = QString::fromUtf8(comment->value);
        }
        reader->m_commentsRead = true;
    }

    if (reader->m_channelCount == 0) {
	FishSoundInfo fsinfo;
	fish_sound_command(fs, FISH_SOUND_GET_INFO,
			   &fsinfo, sizeof(FishSoundInfo));
	reader->m_fileRate = fsinfo.samplerate;
	reader->m_channelCount = fsinfo.channels;
        reader->initialiseDecodeCache();
    }

    if (nframes > 0) {
        reader->addSamplesToDecodeCache(frames, nframes);
    }

    if (reader->m_cancelled) return 1;
    return 0;
}

void
OggVorbisFileReader::getSupportedExtensions(std::set<QString> &extensions)
{
    extensions.insert("ogg");
}

bool
OggVorbisFileReader::supportsExtension(QString extension)
{
    std::set<QString> extensions;
    getSupportedExtensions(extensions);
    return (extensions.find(extension.toLower()) != extensions.end());
}

bool
OggVorbisFileReader::supportsContentType(QString type)
{
    return (type == "application/ogg");
}

bool
OggVorbisFileReader::supports(RemoteFile &source)
{
    return (supportsExtension(source.getExtension()) ||
            supportsContentType(source.getContentType()));
}

#endif
#endif