view data/fileio/OggVorbisFileReader.cpp @ 490:c3fb8258e34d

* Make it possible to import an entire session from an RDF document.
  However, at the moment the timings of events appear to be constrained
  by how far the audio decoder has got through its audio file at the
  time the event is queried -- need to investigate.

/* -*- 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/ProgressReporter.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 <QFileInfo>

static int instances = 0;

OggVorbisFileReader::OggVorbisFileReader(FileSource source,
                                         DecodeMode decodeMode,
                                         CacheMode mode,
                                         size_t targetRate,
                                         ProgressReporter *reporter) :
    CodedAudioFileReader(mode, targetRate),
    m_source(source),
    m_path(source.getLocalFilename()),
    m_reporter(reporter),
    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) {

        if (m_reporter) {
            connect(m_reporter, SIGNAL(cancelled()), this, SLOT(cancelled()));
            m_reporter->setMessage
                (tr("Decoding %1...").arg(QFileInfo(m_path).fileName()));
        }

        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();
        endSerialised();

    } else {

        if (m_reporter) m_reporter->setProgress(100);

        while (oggz_read(m_oggz, 1024) > 0 &&
               (m_channelCount == 0 || m_fileRate == 0 || m_sampleRate == 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::cancelled()
{
    m_cancelled = true; 
}

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 p = lrint(double(reader->m_bytesRead) * 114 /
                  double(reader->m_fileSize));
    if (p > 99) p = 99;
    reader->m_completion = p;
    reader->progress(p);

    if (reader->m_fileSize > 0 && reader->m_reporter) {
        reader->m_reporter->setProgress(p);
    }

    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);
            }
        }
        {
            const FishSoundComment *comment = fish_sound_comment_first_byname
                (fs, "ARTIST");
            if (comment && comment->value) {
                reader->m_maker = 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(FileSource &source)
{
    return (supportsExtension(source.getExtension()) ||
            supportsContentType(source.getContentType()));
}

#endif
#endif