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52 lines
1.8 KiB
C
52 lines
1.8 KiB
C
/*(LGPL)
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---------------------------------------------------------------------------
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a_sequencer.h - MIDI Sequencer
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---------------------------------------------------------------------------
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* Copyright (C) 2002, David Olofson
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef _A_SEQUENCER_H_
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#define _A_SEQUENCER_H_
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#include "a_midisock.h"
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#include "a_midifile.h"
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int sequencer_open(midisock_t *ms, float framerate);
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void sequencer_close(void);
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/*
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* Starts playing 'mf' at 'pitch' (0 ==> normal) and 'volume'.
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* The sequencer context is marked with the positive value 'tag'
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* for later reference. 'pitch' and 'volume' are 16:16 fixed
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* point values, to match the engine control data type.
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* Returns a negative value if an error occurred.
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*/
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int sequencer_play(midi_file_t *mf, int tag, int pitch, int volume);
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/*
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* Stop the sequence marked with 'tag'.
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* Pass -1 for 'tag' to stop all playing sequences.
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*/
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void sequencer_stop(int tag);
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/* Returns 1 if the sequence marked 'tag' is still playing. */
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int sequencer_playing(int tag);
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void sequencer_process(unsigned frames);
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#endif /*_A_SEQUENCER_H_*/
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