Mercurial > hg > svcore
view data/fileio/OggVorbisFileReader.cpp @ 193:bf1f256864de
* A start to a panner widget to go with thumbwheels
author | Chris Cannam |
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date | Wed, 18 Oct 2006 16:38:30 +0000 |
parents | 06ad01f3e553 |
children | 71dfc6ab3b54 |
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/* -*- 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, bool showProgress, CacheMode mode) : CodedAudioFileReader(mode), m_path(path), m_progress(0), m_fileSize(0), m_bytesRead(0), m_cancelled(false) { m_frameCount = 0; m_channelCount = 0; m_sampleRate = 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(); OGGZ *oggz; if (!(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(oggz, -1, readPacket, this); if (showProgress) { m_progress = new QProgressDialog (QObject::tr("Decoding %1...").arg(QFileInfo(path).fileName()), QObject::tr("Stop"), 0, 100); m_progress->hide(); } while (oggz_read(oggz, 1024) > 0); fish_sound_delete(m_fishSound); m_fishSound = 0; oggz_close(oggz); if (isDecodeCacheInitialised()) finishDecodeCache(); if (showProgress) { delete m_progress; m_progress = 0; } } OggVorbisFileReader::~OggVorbisFileReader() { std::cerr << "OggVorbisFileReader::~OggVorbisFileReader(" << m_path.toLocal8Bit().data() << "): now have " << (--instances) << " instances" << std::endl; } 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; if (reader->m_fileSize > 0 && reader->m_progress) { // 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; 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_channelCount == 0) { FishSoundInfo fsinfo; fish_sound_command(fs, FISH_SOUND_GET_INFO, &fsinfo, sizeof(FishSoundInfo)); reader->m_channelCount = fsinfo.channels; reader->m_sampleRate = fsinfo.samplerate; reader->initialiseDecodeCache(); } if (nframes > 0) { reader->m_frameCount += nframes; for (long i = 0; i < nframes; ++i) { for (size_t c = 0; c < reader->m_channelCount; ++c) { reader->addSampleToDecodeCache(frames[c][i]); // reader->m_data.push_back(frames[c][i]); } } MUNLOCK_SAMPLEBLOCK(reader->m_data); } if (reader->m_cancelled) return 1; return 0; } void OggVorbisFileReader::getSupportedExtensions(std::set<QString> &extensions) { extensions.insert("ogg"); } #endif #endif