87a636ccb0
If you ever want to run midi(4) out of the giant lock, uncomment MIDI_OUTOFGIANT in midi.h. Confirmed to work for csamidi with WITNESS and INVARIANTS. - midi_info, midi_open and seq_info are now tailqs, allowing arbitrary numbers of devices to be configured. - Do not send an active sensing message to reset midi modules. - Clone /dev/sequencer*. /dev/sequencer0 and /dev/sequencer are generated upon initialization.
547 lines
11 KiB
C
547 lines
11 KiB
C
/*
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* Copyright by Hannu Savolainen 1993
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions 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
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS
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* IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 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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* This is the interface for a sequencer to interact a midi driver.
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* This interface translates the sequencer operations to the corresponding
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* midi messages, and vice versa.
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*/
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#include <dev/sound/midi/midi.h>
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#define TYPEDRANGE(type, x, lower, upper) \
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{ \
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type tl, tu; \
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tl = (lower); \
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tu = (upper); \
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if (x < tl) { \
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x = tl; \
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} else if(x > tu) { \
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x = tu; \
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} \
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}
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/*
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* These functions goes into midisynthdev_op_desc.
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*/
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static mdsy_killnote_t synth_killnote;
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static mdsy_setinstr_t synth_setinstr;
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static mdsy_startnote_t synth_startnote;
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static mdsy_reset_t synth_reset;
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static mdsy_hwcontrol_t synth_hwcontrol;
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static mdsy_loadpatch_t synth_loadpatch;
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static mdsy_panning_t synth_panning;
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static mdsy_aftertouch_t synth_aftertouch;
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static mdsy_controller_t synth_controller;
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static mdsy_patchmgr_t synth_patchmgr;
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static mdsy_bender_t synth_bender;
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static mdsy_allocvoice_t synth_allocvoice;
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static mdsy_setupvoice_t synth_setupvoice;
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static mdsy_sendsysex_t synth_sendsysex;
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static mdsy_prefixcmd_t synth_prefixcmd;
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static mdsy_volumemethod_t synth_volumemethod;
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static mdsy_readraw_t synth_readraw;
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static mdsy_writeraw_t synth_writeraw;
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/*
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* This is the synthdev_info for a midi interface device.
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* You may have to replace a few of functions for an internal
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* synthesizer.
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*/
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synthdev_info midisynth_op_desc = {
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synth_killnote,
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synth_setinstr,
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synth_startnote,
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synth_reset,
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synth_hwcontrol,
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synth_loadpatch,
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synth_panning,
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synth_aftertouch,
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synth_controller,
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synth_patchmgr,
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synth_bender,
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synth_allocvoice,
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synth_setupvoice,
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synth_sendsysex,
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synth_prefixcmd,
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synth_volumemethod,
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synth_readraw,
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synth_writeraw,
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};
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/* The following functions are local. */
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static int synth_leavesysex(mididev_info *md);
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/*
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* Here are the main functions to interact to the midi sequencer.
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* These are called from the sequencer functions in sys/i386/isa/snd/sequencer.c.
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*/
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static int
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synth_killnote(mididev_info *md, int chn, int note, int vel)
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{
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int unit;
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synthdev_info *sd;
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u_char c[3];
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unit = md->unit;
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sd = &md->synth;
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if (note < 0 || note > 127 || chn < 0 || chn > 15)
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return (EINVAL);
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TYPEDRANGE(int, vel, 0, 127);
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if (synth_leavesysex(md) == EAGAIN)
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return (EAGAIN);
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if (vel == 64) {
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c[0] = 0x90 | (chn & 0x0f); /* Note on. */
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c[1] = (u_char)note;
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c[2] = 0;
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} else {
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c[0] = 0x80 | (chn & 0x0f); /* Note off. */
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c[1] = (u_char)note;
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c[2] = (u_char)vel;
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}
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if (synth_prefixcmd(md, c[0]))
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return (0);
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if (md->synth.writeraw(md, c, 3, 1) == EAGAIN)
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return EAGAIN;
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return (0);
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}
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static int
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synth_setinstr(mididev_info *md, int chn, int instr)
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{
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int unit;
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synthdev_info *sd;
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u_char c[2];
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unit = md->unit;
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sd = &md->synth;
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if (instr < 0 || instr > 127 || chn < 0 || chn > 15)
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return (EINVAL);
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if (synth_leavesysex(md) == EAGAIN)
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return (EAGAIN);
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c[0] = 0xc0 | (chn & 0x0f); /* Progamme change. */
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c[1] = (u_char)instr;
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if (md->synth.writeraw(md, c, 3, 1) == EAGAIN)
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return (EAGAIN);
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return (0);
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}
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static int
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synth_startnote(mididev_info *md, int chn, int note, int vel)
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{
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int unit;
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synthdev_info *sd;
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u_char c[3];
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unit = md->unit;
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sd = &md->synth;
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if (note < 0 || note > 127 || chn < 0 || chn > 15)
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return (EINVAL);
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TYPEDRANGE(int, vel, 0, 127);
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if (synth_leavesysex(md) == EAGAIN)
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return (EAGAIN);
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c[0] = 0x90 | (chn & 0x0f); /* Note on. */
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c[1] = (u_char)note;
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c[2] = (u_char)vel;
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if (synth_prefixcmd(md, c[0]))
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return (0);
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if (md->synth.writeraw(md, c, 3, 1) == EAGAIN)
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return (EAGAIN);
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return (0);
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}
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static int
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synth_reset(mididev_info *md)
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{
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synth_leavesysex(md);
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return (0);
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}
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static int
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synth_hwcontrol(mididev_info *md, u_char *event)
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{
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/* NOP. */
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return (0);
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}
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static int
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synth_loadpatch(mididev_info *md, int format, struct uio *buf, int offs, int count, int pmgr_flag)
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{
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struct sysex_info sysex;
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synthdev_info *sd;
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int unit, i, eox_seen, first_byte, left, src_offs, hdr_size;
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u_char c[count];
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unit = md->unit;
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sd = &md->synth;
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eox_seen = 0;
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first_byte = 1;
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hdr_size = offsetof(struct sysex_info, data);
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if (synth_leavesysex(md) == EAGAIN)
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return (EAGAIN);
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if (synth_prefixcmd(md, 0xf0))
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return (0);
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if (format != SYSEX_PATCH) {
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printf("synth_loadpatch: patch format 0x%x is invalid.\n", format);
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return (EINVAL);
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}
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if (count < hdr_size) {
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printf("synth_loadpatch: patch header is too short.\n");
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return (EINVAL);
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}
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count -= hdr_size;
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/* Copy the patch data. */
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if (uiomove((caddr_t)&((char *)&sysex)[offs], hdr_size - offs, buf))
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printf("synth_loadpatch: memory mangled?\n");
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if (count < sysex.len) {
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sysex.len = (long)count;
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printf("synth_loadpatch: sysex record of %d bytes is too long, adjusted to %d bytes.\n", (int)sysex.len, count);
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}
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left = sysex.len;
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src_offs = 0;
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for (i = 0 ; i < left ; i++) {
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uiomove((caddr_t)&c[i], 1, buf);
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eox_seen = i > 0 && (c[i] & 0x80) != 0;
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if (eox_seen && c[i] != 0xf7)
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c[i] = 0xf7;
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if (i == 0 && c[i] != 0x80) {
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printf("synth_loadpatch: sysex does not begin with the status.\n");
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return (EINVAL);
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}
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if (!first_byte && (c[i] & 0x80) != 0) {
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md->synth.writeraw(md, c, i + 1, 0);
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return (0);
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}
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first_byte = 0;
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}
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if (!eox_seen) {
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c[0] = 0xf7;
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md->synth.writeraw(md, c, 1, 0);
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}
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return (0);
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}
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static int
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synth_panning(mididev_info *md, int chn, int pan)
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{
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/* NOP. */
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return (0);
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}
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static int
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synth_aftertouch(mididev_info *md, int chn, int press)
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{
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int unit;
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synthdev_info *sd;
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u_char c[2];
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unit = md->unit;
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sd = &md->synth;
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if (press < 0 || press > 127 || chn < 0 || chn > 15)
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return (EINVAL);
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if (synth_leavesysex(md) == EAGAIN)
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return (EAGAIN);
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c[0] = 0xd0 | (chn & 0x0f); /* Channel Pressure. */
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c[1] = (u_char)press;
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if (synth_prefixcmd(md, c[0]))
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return (0);
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if (md->synth.writeraw(md, c, 2, 1) == EAGAIN)
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return (EAGAIN);
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return (0);
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}
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static int
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synth_controller(mididev_info *md, int chn, int ctrlnum, int val)
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{
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int unit;
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synthdev_info *sd;
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u_char c[3];
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unit = md->unit;
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sd = &md->synth;
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if (ctrlnum < 1 || ctrlnum > 127 || chn < 0 || chn > 15)
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return (EINVAL);
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if (synth_leavesysex(md) == EAGAIN)
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return (EAGAIN);
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c[0] = 0xb0 | (chn & 0x0f); /* Control Message. */
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c[1] = (u_char)ctrlnum;
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if (synth_prefixcmd(md, c[0]))
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return (0);
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if (md->synth.writeraw(md, c, 3, 1) == EAGAIN)
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return (EAGAIN);
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return (0);
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}
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static int
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synth_patchmgr(mididev_info *md, struct patmgr_info *rec)
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{
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return (EINVAL);
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}
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static int
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synth_bender(mididev_info *md, int chn, int val)
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{
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int unit;
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synthdev_info *sd;
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u_char c[3];
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unit = md->unit;
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sd = &md->synth;
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if (val < 0 || val > 16383 || chn < 0 || chn > 15)
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return (EINVAL);
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if (synth_leavesysex(md) == EAGAIN)
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return (EAGAIN);
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c[0] = 0xe0 | (chn & 0x0f); /* Pitch bend. */
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c[1] = (u_char)val & 0x7f;
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c[2] = (u_char)(val >> 7) & 0x7f;
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if (synth_prefixcmd(md, c[0]))
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return (0);
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if (md->synth.writeraw(md, c, 3, 1) == EAGAIN)
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return (EAGAIN);
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return (0);
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}
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static int
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synth_allocvoice(mididev_info *md, int chn, int note, struct voice_alloc_info *alloc)
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{
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/* NOP. */
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return (0);
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}
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static int
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synth_setupvoice(mididev_info *md, int voice, int chn)
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{
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/* NOP. */
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return (0);
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}
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static int
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synth_sendsysex(mididev_info *md, u_char *sysex, int len)
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{
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int unit, i;
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synthdev_info *sd;
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u_char c[len];
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unit = md->unit;
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sd = &md->synth;
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mtx_lock(&sd->status_mtx);
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for (i = 0 ; i < len ; i++) {
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switch (sysex[i]) {
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case 0xf0:
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/* Sysex begins. */
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if (synth_prefixcmd(md, 0xf0)) {
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mtx_unlock(&sd->status_mtx);
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return (0);
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}
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sd->sysex_state = 1;
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break;
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case 0xf7:
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/* Sysex ends. */
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if (!sd->sysex_state) {
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mtx_unlock(&sd->status_mtx);
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return (0);
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}
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sd->sysex_state = 0;
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break;
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default:
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if (!sd->sysex_state) {
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mtx_unlock(&sd->status_mtx);
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return (0);
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}
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if ((sysex[i] & 0x80) != 0) {
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/* A status in a sysex? */
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sysex[i] = 0xf7;
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sd->sysex_state = 0;
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}
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break;
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}
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c[i] = sysex[i];
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if (!sd->sysex_state)
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break;
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}
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mtx_unlock(&sd->status_mtx);
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if (md->synth.writeraw(md, c, i, 1) == EAGAIN)
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return (EAGAIN);
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return (0);
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}
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static int
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synth_prefixcmd(mididev_info *md, int status)
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{
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/* NOP. */
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return (0);
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}
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static int
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synth_volumemethod(mididev_info *md, int mode)
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{
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/* NOP. */
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return (0);
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}
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static int
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synth_readraw(mididev_info *md, u_char *buf, int len, int nonblock)
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{
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int unit, ret;
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if (md == NULL)
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return (ENXIO);
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unit = md->unit;
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if ((md->fflags & FREAD) == 0) {
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DEB(printf("mpu_readraw: unit %d is not for reading.\n", unit));
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return (EIO);
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}
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mtx_lock(&md->flagqueue_mtx);
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/* Begin recording. */
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if ((md->flags & MIDI_F_READING) == 0)
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md->callback(md, MIDI_CB_START | MIDI_CB_RD);
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if (nonblock) {
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/* Have we got enough data to read? */
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if (md->midi_dbuf_in.rl < len) {
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mtx_unlock(&md->flagqueue_mtx);
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return (EAGAIN);
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}
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}
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ret = midibuf_seqread(&md->midi_dbuf_in, buf, len, &md->flagqueue_mtx);
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mtx_unlock(&md->flagqueue_mtx);
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if (ret < 0)
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ret = -ret;
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else
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ret = 0;
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return (ret);
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}
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static int
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synth_writeraw(mididev_info *md, u_char *buf, int len, int nonblock)
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{
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int unit, ret;
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if (md == NULL)
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return (ENXIO);
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unit = md->unit;
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if ((md->fflags & FWRITE) == 0) {
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DEB(printf("synth_writeraw: unit %d is not for writing.\n", unit));
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return (EIO);
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}
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/* For nonblocking, have we got enough space to write? */
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mtx_lock(&md->flagqueue_mtx);
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if (nonblock && md->midi_dbuf_out.fl < len) {
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/* Begin playing. */
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md->callback(md, MIDI_CB_START | MIDI_CB_WR);
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mtx_unlock(&md->flagqueue_mtx);
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return (EAGAIN);
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}
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ret = midibuf_seqwrite(&md->midi_dbuf_out, buf, len, &md->flagqueue_mtx);
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if (ret < 0)
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ret = -ret;
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else {
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/* Begin playing. */
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md->callback(md, MIDI_CB_START | MIDI_CB_WR);
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ret = 0;
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}
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mtx_unlock(&md->flagqueue_mtx);
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return (ret);
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}
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/*
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* The functions below here are the libraries for the above ones.
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*/
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static int
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synth_leavesysex(mididev_info *md)
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{
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int unit;
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synthdev_info *sd;
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u_char c;
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unit = md->unit;
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sd = &md->synth;
|
|
|
|
mtx_lock(&sd->status_mtx);
|
|
if (!sd->sysex_state) {
|
|
mtx_unlock(&sd->status_mtx);
|
|
return (0);
|
|
}
|
|
|
|
sd->sysex_state = 0;
|
|
mtx_unlock(&sd->status_mtx);
|
|
c = 0xf7;
|
|
if (md->synth.writeraw(md, &c, sizeof(c), 1) == EAGAIN)
|
|
return (EAGAIN);
|
|
|
|
return (0);
|
|
}
|