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65 lines
2.7 KiB
C
65 lines
2.7 KiB
C
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/*
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* Include file for midi buffer.
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*
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* Copyright by Seigo Tanimura 1999.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*
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*/
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/*
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* descriptor of a midi buffer. See midibuf.c for documentation.
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* (rp,rl) and (fp,fl) identify the READY and FREE regions of the
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* buffer. dl contains the length used for dma transfer, dl>0 also
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* means that the channel is busy and there is a DMA transfer in progress.
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*/
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typedef struct _midi_dbuf {
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char *buf;
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int bufsize ;
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volatile int rp, fp; /* pointers to the ready and free area */
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volatile int dl; /* transfer size */
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volatile int rl, fl; /* length of ready and free areas. */
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int int_count;
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int chan; /* dma channel */
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int unit_size ; /* unit size */
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struct selinfo sel;
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u_long total; /* total bytes processed */
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u_long prev_total; /* copy of the above when GETxPTR called */
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int tsleep_in, tsleep_out; /* pillows to tsleep on */
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int blocksize; /* block size */
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} midi_dbuf ;
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/*
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* These are the midi buffer methods, used in midi interface devices.
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*/
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int midibuf_init(midi_dbuf *dbuf);
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int midibuf_seqwrite(midi_dbuf *dbuf, u_char* data, int len);
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int midibuf_uiowrite(midi_dbuf *dbuf, struct uio *buf, int len);
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int midibuf_output_intr(midi_dbuf *dbuf, u_char *data, int len);
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int midibuf_input_intr(midi_dbuf *dbuf, u_char *data, int len);
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int midibuf_seqread(midi_dbuf *dbuf, u_char* data, int len);
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int midibuf_seqcopy(midi_dbuf *dbuf, u_char* data, int len);
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int midibuf_uioread(midi_dbuf *dbuf, struct uio *buf, int len);
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