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9aa3c44d4e
* add config and GUI support for internal player back end switching;
* make FFmpeg player disabling option consistent with other similar
qmake options by using CONFIG;
* add a new qmake option that disables Qt Multimedia player. This is
useful for GNU/Linux distributions where Qt WebKit and Qt Multimedia
packages depend on different GStreamer versions and don't work
correctly when combined in one application.
The existing FFmpeg+libao internal player back end has a relatively
low-level implementation, which is difficult to understand and improve.
There are at least 3 open internal player issues:
1) many GNU/Linux users have to edit their libao configuration file to
make Goldendict's internal player work (issue #412);
2) libao's pulseaudio plugin does not support 32-bit audio, which
means that many MediaWiki pronunciations don't work with the most
popular GNU/Linux audio driver (issue #949);
3) Ffmpeg::DecoderContext uses deprecated FFmpeg APIs, which causes
compiler warnings and means that this internal player back end
may not compile with a future FFmpeg library version (issue #978).
The Qt Multimedia back end implementation uses the highest-level
Qt audio API and is very simple.
This new back end works flawlessly on my GNU/Linux machine.
I'm not making it the default back end because I don't know how well
it will work on other platforms with different configurations.
58 lines
961 B
C++
58 lines
961 B
C++
#ifndef __FFMPEGAUDIO_HH_INCLUDED__
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#define __FFMPEGAUDIO_HH_INCLUDED__
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#ifdef MAKE_FFMPEG_PLAYER
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#include <QObject>
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#include <QMutex>
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#include <QAtomicInt>
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#include <QByteArray>
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#include <QThread>
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namespace Ffmpeg
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{
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class AudioService : public QObject
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{
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Q_OBJECT
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public:
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static AudioService & instance();
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void playMemory( const char * ptr, int size );
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void stop();
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signals:
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void cancelPlaying( bool waitUntilFinished );
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void error( QString const & message );
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private:
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AudioService();
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~AudioService();
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};
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class DecoderThread: public QThread
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{
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Q_OBJECT
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static QMutex deviceMutex_;
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QAtomicInt isCancelled_;
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QByteArray audioData_;
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public:
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DecoderThread( QByteArray const & audioData, QObject * parent );
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virtual ~DecoderThread();
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public slots:
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void run();
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void cancel( bool waitUntilFinished );
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signals:
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void error( QString const & message );
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};
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}
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#endif // MAKE_FFMPEG_PLAYER
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#endif // __FFMPEGAUDIO_HH_INCLUDED__
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