RageSoundDriver_ALSA9.h

Go to the documentation of this file.

#ifndef RAGE_SOUND_ALSA9_H
#define RAGE_SOUND_ALSA9_H

#include "RageSound.h"
#include "RageThreads.h"
#include "RageSoundDriver.h"

#include "ALSA9Helpers.h"

class RageSound_ALSA9: public RageSoundDriver
{
private:
        /* This mutex serializes the decode thread and StopMixing. */
        RageMutex m_Mutex;

        /* The only place that takes sounds out of INACTIVE is StartMixing; this mutex
         * serializes inactive sounds. */
        RageMutex m_InactiveSoundMutex;

        struct stream
        {
                /* Actual audio stream: */
                Alsa9Buf *pcm;

                /* Sound object that's playing on this stream, or NULL if this
                 * channel is available: */
                RageSoundBase *snd;
                RageTimer start_time;

                enum {
                        INACTIVE,
                        SETUP,
                        PLAYING,
                        FLUSHING,
                        FINISHED
                } state;

                int64_t flush_pos; /* state == STOPPING only */

                bool GetData( bool &bEOF );

                stream() { pcm = NULL; snd = NULL; state=INACTIVE; }
                ~stream();
        };
        friend struct stream;

        /* Pool of available streams. */
        vector<stream *> stream_pool;

        bool shutdown;


        static int MixerThread_start(void *p);
        void MixerThread();
        RageThread MixingThread;

        void GetData();

public:
        /* virtuals: */
        void StartMixing(RageSoundBase *snd);
        void StopMixing(RageSoundBase *snd);
        int64_t GetPosition( const RageSoundBase *snd ) const;
        int GetSampleRate( int rate ) const;

        void Update(float delta);

        RageSound_ALSA9();
        CString Init();
        ~RageSound_ALSA9();
};

#endif

/*
 * (c) 2002-2004 Glenn Maynard, Aaron VonderHaar
 * All rights reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, and/or sell copies of the Software, and to permit persons to
 * whom the Software is furnished to do so, provided that the above
 * copyright notice(s) and this permission notice appear in all copies of
 * the Software and that both the above copyright notice(s) and this
 * permission notice appear in supporting documentation.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
 * THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
 * INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
 * OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
 * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

---