view data/fileio/BQAFileReader.cpp @ 1752:6d09d68165a4 by-id

Further review of ById: make IDs only available when adding a model to the ById store, not by querying the item directly. This means any id encountered in the wild must have been added to the store at some point (even if later released), which simplifies reasoning about lifecycles

/* -*- 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();
        SVDEBUG << "BQAFileReader: createReadStream failed: " << m_error << endl;
	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();
                SVDEBUG << "BQAFileReader: init failed: " << m_error << endl;
		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();
            SVDEBUG << "BQAFileReader: decode failed: " << m_reader->m_error << endl;
	    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 type)
{
    // extremely optimistic, but it's better than rejecting everything
    //!!! todo: be more sensible
    return (type.startsWith("audio/"));
}

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