annotate data/fileio/OggVorbisFileReader.cpp @ 299:576be0d0d218

* Merge transform directory from sv-match-alignment branch
  (the previous comment included notes for this stuff, but I missed it
  in the actual merge)
* Fix crash when a transform fails to create an output model and the
  thread that created the transform then deletes its input model thinking
  it's no longer needed, even though the transform run thread is still
  using it -- fix is to wait() on the transform before returning the
  null output model

/* -*- 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(QString path,
                                         DecodeMode decodeMode,
                                         CacheMode mode,
                                         size_t targetRate) :
    CodedAudioFileReader(mode, targetRate),
    m_path(path),
    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(" << path.toLocal8Bit().data() << "): now have " << (++instances) << " instances" << std::endl;

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

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

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

#endif
#endif