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