ffmpeg: added embedded cue sheet support

git-svn-id: http://svn.code.sf.net/p/qmmp-dev/code/trunk/qmmp@8834 90c681e8-e032-0410-971d-27865f9a5e38

1 files changed, 209 insertions, 0 deletions

diff --git a/src/plugins/Input/ffmpeg/decoder_ffmpegcue.cpp b/src/plugins/Input/ffmpeg/decoder_ffmpegcue.cpp
new file mode 100644
index 000000000..204f4af05
--- /dev/null
+++ b/src/plugins/Input/ffmpeg/decoder_ffmpegcue.cpp
@@ -0,0 +1,209 @@
+/***************************************************************************
+ *   Copyright (C) 2011-2019 by Ilya Kotov                                 *
+ *   forkotov02@ya.ru                                                      *
+ *                                                                         *
+ *   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.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.         *
+ ***************************************************************************/
+
+#include <QObject>
+#include <QFile>
+#include <QRegExp>
+#include "cueparser.h"
+#include "decoder_ffmpeg.h"
+#include "decoder_ffmpegcue.h"
+
+
+DecoderFFmpegCue::DecoderFFmpegCue(const QString &url)
+    : Decoder()
+{
+    m_url = url;
+}
+
+DecoderFFmpegCue::~DecoderFFmpegCue()
+{
+    if(m_decoder)
+        delete m_decoder;
+    m_decoder = nullptr;
+    if(m_parser)
+        delete m_parser;
+    m_parser = nullptr;
+    if(m_buf)
+        delete [] m_buf;
+    m_buf = nullptr;
+    if(m_input)
+        m_input->deleteLater();
+    m_input = nullptr;
+}
+
+bool DecoderFFmpegCue::initialize()
+{
+    QString filePath = m_url;
+    if(!m_url.startsWith("ffmpeg://"))
+    {
+        qWarning("DecoderFFmpegCue: invalid url.");
+        return false;
+    }
+    filePath.remove("ffmpeg://");
+    filePath.remove(QRegExp("#\\d+$"));
+    m_track = m_url.section("#", -1).toInt();
+
+    AVFormatContext *in = nullptr;
+#ifdef Q_OS_WIN
+    if(avformat_open_input(&in, filePath.toUtf8().constData(), nullptr, nullptr) < 0)
+#else
+    if(avformat_open_input(&in, filePath.toLocal8Bit().constData(), nullptr, nullptr) < 0)
+#endif
+    {
+        qDebug("DecoderFFmpegCue: unable to open file");
+        return false;
+    }
+
+    avformat_find_stream_info(in, nullptr);
+    AVDictionaryEntry *cuesheet = av_dict_get(in->metadata, "cuesheet", nullptr, 0);
+    if(!cuesheet)
+    {
+        avformat_close_input(&in);
+        qWarning("DecoderFFmpegCue: unable to find cuesheet comment.");
+        return false;
+    }
+
+    m_parser = new CueParser(cuesheet->value);
+    m_parser->setDuration(in->duration * 1000 / AV_TIME_BASE);
+    m_parser->setUrl("ffmpeg", filePath);
+
+    if(m_track > m_parser->count() || m_parser->isEmpty())
+    {
+        qWarning("DecoderFFmpegCue: invalid cuesheet");
+        return false;
+    }
+    m_input = new QFile(filePath);
+    if(!m_input->open(QIODevice::ReadOnly))
+    {
+        qWarning("DecoderFFmpegCue:: %s", qPrintable(m_input->errorString()));
+        return false;
+    }
+    QMap<Qmmp::MetaData, QString> metaData = m_parser->info(m_track)->metaData();
+    addMetaData(metaData); //send metadata
+
+    m_duration = m_parser->duration(m_track);
+    m_offset = m_parser->offset(m_track);
+
+    m_decoder = new DecoderFFmpeg(filePath, m_input);
+    if(!m_decoder->initialize())
+    {
+        qWarning("DecoderFFapCUE: invalid audio file");
+        return false;
+    }
+    m_decoder->seek(m_offset);
+
+    configure(m_decoder->audioParameters());
+
+    m_trackSize = audioParameters().sampleRate() * audioParameters().channels() *
+            audioParameters().sampleSize() * m_duration / 1000;
+    m_written = 0;
+
+    m_frameSize = audioParameters().sampleSize() * audioParameters().channels();
+
+    setReplayGainInfo(m_parser->info(m_track)->replayGainInfo()); //send ReplayGaing info
+    addMetaData(m_parser->info(m_track)->metaData()); //send metadata
+    return true;
+}
+
+qint64 DecoderFFmpegCue::totalTime() const
+{
+    return m_decoder ? m_duration : 0;
+}
+
+void DecoderFFmpegCue::seek(qint64 pos)
+{
+    m_decoder->seek(m_offset + pos);
+    m_written = audioParameters().sampleRate() *
+            audioParameters().channels() *
+            audioParameters().sampleSize() * pos/1000;
+}
+
+qint64 DecoderFFmpegCue::read(unsigned char *data, qint64 size)
+{
+    if(m_trackSize - m_written < m_frameSize) //end of cue track
+        return 0;
+
+    qint64 len = 0;
+
+    if(m_buf) //read remaining data first
+    {
+        len = qMin(m_bufSize, size);
+        memmove(data, m_buf, len);
+        if(size >= m_bufSize)
+        {
+            delete[] m_buf;
+            m_buf = nullptr;
+            m_bufSize = 0;
+        }
+        else
+            memmove(m_buf, m_buf + len, size - len);
+    }
+    else
+        len = m_decoder->read(data, size);
+
+    if(len <= 0) //end of file
+        return 0;
+
+    if(len + m_written <= m_trackSize)
+    {
+        m_written += len;
+        return len;
+    }
+
+    qint64 len2 = qMax(qint64(0), m_trackSize - m_written);
+    len2 = (len2 / m_frameSize) * m_frameSize; //integer number of samples
+    m_written += len2;
+    //save data of the next track
+    if(m_buf)
+        delete[] m_buf;
+    m_bufSize = len - len2;
+    m_buf = new char[m_bufSize];
+    memmove(m_buf, data + len2, m_bufSize);
+    return len2;
+}
+
+int DecoderFFmpegCue::bitrate() const
+{
+    return m_decoder->bitrate();
+}
+
+const QString DecoderFFmpegCue::nextURL() const
+{
+    if(m_track +1 <= m_parser->count())
+        return m_parser->url(m_track + 1);
+    else
+        return QString();
+}
+
+void DecoderFFmpegCue::next()
+{
+    if(m_track +1 <= m_parser->count())
+    {
+        m_track++;
+        m_duration = m_parser->duration(m_track);
+        m_offset = m_parser->offset(m_track);
+        m_trackSize = audioParameters().sampleRate() *
+                audioParameters().channels() *
+                audioParameters().sampleSize() * m_duration/1000;
+        addMetaData(m_parser->info(m_track)->metaData());
+        setReplayGainInfo(m_parser->info(m_track)->replayGainInfo());
+        m_written = 0;
+    }
+}