77 lines
2.4 KiB
C++
77 lines
2.4 KiB
C++
#ifndef ALSA9_HELPERS_H
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#define ALSA9_HELPERS_H
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#define ALSA_PCM_NEW_HW_PARAMS_API
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#define ALSA_PCM_NEW_SW_PARAMS_API
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#include <alsa/asoundlib.h>
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class Alsa9Buf
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{
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private:
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int channels, samplebits;
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unsigned samplerate;
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int buffersize;
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int64_t last_cursor_pos;
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snd_pcm_uframes_t preferred_writeahead, preferred_chunksize;
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snd_pcm_uframes_t writeahead, chunksize;
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snd_pcm_t *pcm;
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bool Recover( int r );
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bool SetHWParams();
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bool SetSWParams();
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static void ErrorHandler(const char *file, int line, const char *function, int err, const char *fmt, ...);
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public:
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static void InitializeErrorHandler();
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static void GetSoundCardDebugInfo();
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static RString GetHardwareID( RString name="" );
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Alsa9Buf();
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RString Init( int channels,
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int iWriteahead,
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int iChunkSize,
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int iSampleRate );
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~Alsa9Buf();
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int GetNumFramesToFill();
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bool WaitUntilFramesCanBeFilled( int timeout_ms );
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void Write( const int16_t *buffer, int frames );
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void Play();
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void Stop();
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void SetVolume(float vol);
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int GetSampleRate() const { return samplerate; }
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int64_t GetPosition() const;
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int64_t GetPlayPos() const { return last_cursor_pos; }
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};
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#endif
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/*
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* (c) 2002-2004 Glenn Maynard, Aaron VonderHaar
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, and/or sell copies of the Software, and to permit persons to
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* whom the Software is furnished to do so, provided that the above
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* copyright notice(s) and this permission notice appear in all copies of
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* the Software and that both the above copyright notice(s) and this
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* permission notice appear in supporting documentation.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
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* THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
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* INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
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* OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
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* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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