Mercurial > hg > svcore
view data/fileio/BQAFileReader.cpp @ 1591:6e68bd92ee21 bqaudiostream
Add flac metadata example
author | Chris Cannam |
---|---|
date | Mon, 21 Jan 2019 11:45:51 +0000 |
parents | b67f5b6a7978 |
children | c9c8c49b22d6 |
line wrap: on
line source
/* -*- 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 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 "BQAFileReader.h" #include <bqaudiostream/AudioReadStreamFactory.h> #include <bqaudiostream/AudioReadStream.h> #include <bqaudiostream/Exceptions.h> #include "base/Profiler.h" #include "base/ProgressReporter.h" #include <QFileInfo> using namespace std; BQAFileReader::BQAFileReader(FileSource source, DecodeMode decodeMode, CacheMode mode, sv_samplerate_t targetRate, bool normalised, ProgressReporter *reporter) : CodedAudioFileReader(mode, targetRate, normalised), m_source(source), m_path(source.getLocalFilename()), m_cancelled(false), m_completion(0), m_reporter(reporter), m_decodeThread(0) { SVDEBUG << "BQAFileReader: local path: \"" << m_path << "\", decode mode: " << decodeMode << " (" << (decodeMode == DecodeAtOnce ? "DecodeAtOnce" : "DecodeThreaded") << ")" << endl; m_channelCount = 0; m_fileRate = 0; Profiler profiler("BQAFileReader::BQAFileReader"); try { m_stream = breakfastquay::AudioReadStreamFactory::createReadStream (m_path.toUtf8().data()); } catch (const std::exception &e) { m_error = e.what(); m_stream = 0; return; } m_channelCount = int(m_stream->getChannelCount()); m_fileRate = sv_samplerate_t(m_stream->getSampleRate()); m_title = QString::fromUtf8(m_stream->getTrackName().c_str()); m_maker = QString::fromUtf8(m_stream->getArtistName().c_str()); initialiseDecodeCache(); 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())); } sv_frame_t blockSize = 65536; floatvec_t block(blockSize * m_channelCount, 0.f); while (true) { try { sv_frame_t retrieved = m_stream->getInterleavedFrames(blockSize, block.data()); addSamplesToDecodeCache(block.data(), retrieved); if (retrieved < blockSize) { break; } } catch (const breakfastquay::InvalidFileFormat &f) { m_error = f.what(); break; } if (m_cancelled) break; } if (isDecodeCacheInitialised()) finishDecodeCache(); endSerialised(); if (m_reporter) m_reporter->setProgress(100); delete m_stream; m_stream = 0; } else { if (m_reporter) m_reporter->setProgress(100); m_decodeThread = new DecodeThread(this); m_decodeThread->start(); } } BQAFileReader::~BQAFileReader() { if (m_decodeThread) { m_cancelled = true; m_decodeThread->wait(); delete m_decodeThread; } delete m_stream; } void BQAFileReader::cancelled() { m_cancelled = true; } void BQAFileReader::DecodeThread::run() { if (m_reader->m_cacheMode == CacheInTemporaryFile) { m_reader->startSerialised("BQAFileReader::Decode"); } sv_frame_t blockSize = 65536; floatvec_t block(blockSize * m_reader->getChannelCount(), 0.f); while (true) { try { sv_frame_t retrieved = m_reader->m_stream->getInterleavedFrames (blockSize, block.data()); m_reader->addSamplesToDecodeCache(block.data(), retrieved); if (retrieved < blockSize) { break; } } catch (const breakfastquay::InvalidFileFormat &f) { m_reader->m_error = f.what(); break; } if (m_reader->m_cancelled) break; } if (m_reader->isDecodeCacheInitialised()) m_reader->finishDecodeCache(); m_reader->m_completion = 100; m_reader->endSerialised(); delete m_reader->m_stream; m_reader->m_stream = 0; } void BQAFileReader::getSupportedExtensions(set<QString> &extensions) { vector<string> exts = breakfastquay::AudioReadStreamFactory::getSupportedFileExtensions(); for (auto e: exts) { extensions.insert(QString::fromUtf8(e.c_str())); } } bool BQAFileReader::supportsExtension(QString extension) { set<QString> extensions; getSupportedExtensions(extensions); return (extensions.find(extension.toLower()) != extensions.end()); } bool BQAFileReader::supportsContentType(QString) { //!!! todo return false; } bool BQAFileReader::supports(FileSource &source) { return (supportsExtension(source.getExtension()) || supportsContentType(source.getContentType())); }