mirror of
https://github.com/reactos/reactos.git
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251 lines
3.9 KiB
C++
251 lines
3.9 KiB
C++
/* PROJECT: ReactOS sndrec32
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* LICENSE: GPL - See COPYING in the top level directory
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* FILE: base/applications/sndrec32/audio_waveout.hpp
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* PURPOSE: Windows MM wave out abstraction
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* PROGRAMMERS: Marco Pagliaricci (irc: rendar)
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*/
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#ifndef _AUDIOWAVEOUT__H_
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#define _AUDIOWAVEOUT__H_
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#include "audio_def.hpp"
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#include "audio_format.hpp"
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#include "audio_producer.hpp"
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_AUDIO_NAMESPACE_START_
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enum audio_waveout_status { WAVEOUT_NOTREADY, WAVEOUT_READY,
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WAVEOUT_PLAYING, WAVEOUT_FLUSHING,
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WAVEOUT_PAUSED, WAVEOUT_STOP,
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WAVEOUT_ERR,
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};
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class audio_waveout
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{
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friend class audio_buffer;
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private:
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static DWORD WINAPI
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playing_procedure( LPVOID );
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HANDLE wakeup_playthread;
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protected:
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WAVEFORMATEX wave_format;
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WAVEHDR * wave_headers;
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HWAVEOUT waveout_handle;
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const audio_format & aud_info;
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audio_producer & audio_buf;
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//
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// Audio Playing Thread id
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//
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DWORD playthread_id;
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audio_waveout_status status;
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float buf_secs;
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//
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// The temporary buffers for the audio
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// data outgoing to the waveout device
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// and its size, and its total number.
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//
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//base address for entire memory
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BYTE * main_buffer;
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//size in bytes for the entire memory
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unsigned int mb_size;
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//number of little buffers
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unsigned int buffers;
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//
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// Protected Functions
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//
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void init_( void );
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void alloc_buffers_mem_( unsigned int, float );
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void free_buffers_mem_( void );
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void init_headers_( void );
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void prep_headers_( void );
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void unprep_headers_( void );
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public:
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//
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// Ctors
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//
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audio_waveout( const audio_format & aud_fmt,
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audio_producer & a_buf )
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: wave_headers( 0 ), aud_info( aud_fmt ),
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audio_buf( a_buf ), status( WAVEOUT_NOTREADY ),
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main_buffer( 0 ), mb_size( 0 ),
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buffers( _AUDIO_DEFAULT_WAVEOUTBUFFERS )
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{
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//
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// Initializing internal wavein data
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//
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init_();
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}
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//
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// Dtor
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//
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~audio_waveout( void )
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{ }
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//
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// Public Functions
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//
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void open ( void );
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void play ( void );
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void pause ( void );
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void stop ( void );
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void close ( void );
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audio_waveout_status current_status( void )
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{ return status; }
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BYTE * buf( void ) { return main_buffer; }
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unsigned int bufsz( void ) { return mb_size; }
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unsigned int samplevalue_max( void )
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{
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if ( aud_info.bits() == 16 )
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return (unsigned int )65535;
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else if ( aud_info.bits() == 8 )
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return (unsigned int)255;
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else
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return 0;
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}
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unsigned tot_samples_buf( void )
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{
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return aud_info.samples_in_bytes( mb_size );
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}
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unsigned int nsample ( unsigned int nsamp )
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{
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unsigned int svalue;
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if ( aud_info.bits() == 16 )
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svalue = ( unsigned int ) abs( *(( short * ) (main_buffer + aud_info.bytes_in_samples( nsamp ))));
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else if ( aud_info.bits() == 8 )
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svalue = (unsigned int)(( ptrdiff_t ) *(main_buffer + aud_info.bytes_in_samples( nsamp )));
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else
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svalue = 0;
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return svalue;
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}
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};
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_AUDIO_NAMESPACE_END_
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#endif //ifdef _AUDIOWAVEOUT__H_
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