AudioInputGst.h

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// AudioInput.h: Audio input processing using Gstreamer.
// 
//   Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012
//   Free Software Foundation, Inc.
// 
// 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 3 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 St, Fifth Floor, Boston, MA  02110-1301  USA

#ifndef GNASH_AUDIOINPUTGST_H
#define GNASH_AUDIOINPUTGST_H

#include "gst/gst.h"
#include "AudioInput.h"
#include <string>
#include <cstdint> // for C99 int types
#include <vector>
#include <cassert>

namespace gnash {
namespace media {
namespace gst {

class GnashAudio {
    public:
        GstElement* getElementPtr() {return _element;}
        
        void setElementPtr(GstElement* element) {_element = element;}
        
        gchar* getDevLocation() {return _devLocation;}
        
        void setDevLocation(gchar *l) {_devLocation = l;}
        
        gchar* getGstreamerSrc() {return _gstreamerSrc;}
        
        void setGstreamerSrc(gchar *s) {_gstreamerSrc = s;}
        
        gchar* getProductName() {return _productName;}
        
        void setProductName(gchar *n) {_productName = n;}

        GnashAudio();
        
    private:
        GstElement* _element;
        
        gchar* _devLocation;
        
        gchar* _gstreamerSrc;
        
        gchar* _productName;
};
 
class GnashAudioPrivate {
    public:
        GstElement *audioSource;
        
        GstElement *audioEnc;
        
        GnashAudioPrivate();
        
        void setAudioDevice(GnashAudio* d) {_audioDevice = d;}
        
        GnashAudio* getAudioDevice() {return _audioDevice;}
        
        void setDeviceName(gchar* n) {_deviceName = n;}
        
        gchar* getDeviceName() {return _deviceName;}
    
    //FIXME: I can't figure out why this isn't working right. Since I made 
    // AudioInputGst inherit from GnashAudioPrivate it should be able to access
    // protected variables, but I can't get it to work!    
    //protected:
        GnashAudio* _audioDevice;
        
        gchar* _deviceName;
        
        GstElement* _pipeline;
        
        GstElement* _audioMainBin;
        
        GstElement* _audioSourceBin;
        
        GstElement* _audioPlaybackBin;
        
        GstElement* _audioSaveBin;
        
        GstElement* _mux;
        
        gboolean _pipelineIsPlaying;
};
 
//
//
class AudioInputGst : public AudioInput, public GnashAudioPrivate
{
        
public:


        AudioInputGst();

        virtual ~AudioInputGst();

    //setters and getters
    virtual void setActivityLevel(double a) {
        _activityLevel = a;
    }

    virtual double activityLevel() const {
        return _activityLevel;
    }
    
    //
    virtual void setGain(double g) {
        assert (g >= 0 && g <= 100);
        _gain = g;
        audioChangeSourceBin(getGlobalAudio());
    }

    //
    virtual double gain() const {
        return _gain;
    }
    
    virtual void setIndex(int i) {
        _index = i;
    }

    virtual int index() const {
        return _index; 
    }
    
    virtual bool muted() {
        return _muted;
    }
    
    virtual void setName(std::string name) {
        _name = name;
    }

    virtual const std::string& name() const { return _name; }
    
    //
    virtual void setRate(int r) {

        // Yes, this isn't pretty, but it is only designed for the 
        // testsuite to continue passing.
        if (r >= 44) {
            _rate = 44000;
            audioChangeSourceBin(getGlobalAudio());
            return;
        }
        static const int rates[] = { 5, 8, 11, 16, 22, 44 };
        const int* rate = rates;
        while (*rate < r) ++rate;
        _rate = *rate * 1000;
        audioChangeSourceBin(getGlobalAudio());
    }

    //
    virtual int rate() const {
        return _rate / 1000;
    }
    
    virtual void setSilenceLevel(double s) {
        _silenceLevel = s;
    }
    
    virtual double silenceLevel() const {
        return _silenceLevel;
    }
    
    virtual void setSilenceTimeout(int s) {
        _silenceTimeout = s;
    }
    
    virtual int silenceTimeout() const {
        return _silenceTimeout;
    }
    
    virtual void setUseEchoSuppression(bool e) {
        _useEchoSuppression = e;
    }

    virtual bool useEchoSuppression() const {
        return _useEchoSuppression;
    }

private:

    double _activityLevel;
    double _gain;
    int _index;
    bool _muted;
    std::string _name;
    int _rate;
    double _silenceLevel;
    int _silenceTimeout;
    bool _useEchoSuppression;


    void findAudioDevs();
    
    int makeAudioDevSelection();
    
    void getSelectedCaps(int devselect);
    
    bool checkSupportedFormats(GstCaps *caps);
    
    GnashAudioPrivate* transferToPrivate(int devselect);
    
    gboolean audioCreateMainBin (GnashAudioPrivate *audio);
    
    gboolean audioCreateSourceBin (GnashAudioPrivate *audio);
    
    gboolean audioCreatePlaybackBin (GnashAudioPrivate *audio);
    
    gboolean makeAudioSourcePlaybackLink (GnashAudioPrivate *audio);
    
    gboolean breakAudioSourcePlaybackLink (GnashAudioPrivate *audio);
    
    gboolean makeAudioSourceSaveLink (GnashAudioPrivate *audio);
    
    gboolean breakAudioSourceSaveLink (GnashAudioPrivate *audio);
    
    gboolean audioCreateSaveBin (GnashAudioPrivate *audio);
    
    bool audioPlay(GnashAudioPrivate *audio);
    
    bool audioStop(GnashAudioPrivate *audio);
    
    gboolean audioChangeSourceBin (GnashAudioPrivate *audio);
    
    int getNumdevs() const { return _audioVect.size(); }
    
    std::vector<GnashAudio*>* getAudioVect() {return &_audioVect;}
    
    GnashAudioPrivate* getGlobalAudio() {return _globalAudio;}
    
    double gstgain() { return (gain() - 50) * 1.2; }

private:
    
    std::vector<GnashAudio*> _audioVect;
    
    GnashAudioPrivate* _globalAudio;

};

} // gst namespace
} // gnash.media namespace 
} // gnash namespace

#endif