diff data/fileio/BQAFileReader.cpp @ 1583:c8fad3c14a2b bqaudiostream

Start wiring in BQAudioStream stuff

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/data/fileio/BQAFileReader.cpp	Thu Dec 06 12:50:28 2018 +0000
@@ -0,0 +1,200 @@
+/* -*- 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 = m_stream->getChannelCount();
+    m_fileRate = m_stream->getSampleRate();
+
+    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();
+    }
+
+//!!! todo metadata - maker, title, tags
+}
+
+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 type)
+{
+//!!! todo
+    return false;
+}
+
+bool
+BQAFileReader::supports(FileSource &source)
+{
+    return (supportsExtension(source.getExtension()) ||
+            supportsContentType(source.getContentType()));
+}
+