645 lines
14 KiB
C
645 lines
14 KiB
C
/*
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* sound/midi_synth.c
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*
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* High level midi sequencer manager for dumb MIDI interfaces.
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*
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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 without
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* modification, are permitted provided that the following conditions are
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* met: 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer. 2.
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* 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 ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* 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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*/
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#define USE_SEQ_MACROS
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#define USE_SIMPLE_MACROS
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#include "sound_config.h"
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#if defined(CONFIGURE_SOUNDCARD) && !defined(EXCLUDE_MIDI)
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#define _MIDI_SYNTH_C_
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DEFINE_WAIT_QUEUE (sysex_sleeper, sysex_sleep_flag);
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#include "midi_synth.h"
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static int midi2synth[MAX_MIDI_DEV];
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static unsigned char prev_out_status[MAX_MIDI_DEV];
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#define STORE(cmd) \
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{ \
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int len; \
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unsigned char obuf[8]; \
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cmd; \
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seq_input_event(obuf, len); \
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}
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#define _seqbuf obuf
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#define _seqbufptr 0
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#define _SEQ_ADVBUF(x) len=x
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void
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do_midi_msg (int synthno, unsigned char *msg, int mlen)
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{
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switch (msg[0] & 0xf0)
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{
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case 0x90:
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if (msg[2] != 0)
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{
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STORE (SEQ_START_NOTE (synthno, msg[0] & 0x0f, msg[1], msg[2]));
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break;
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}
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msg[2] = 64;
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case 0x80:
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STORE (SEQ_STOP_NOTE (synthno, msg[0] & 0x0f, msg[1], msg[2]));
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break;
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case 0xA0:
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STORE (SEQ_KEY_PRESSURE (synthno, msg[0] & 0x0f, msg[1], msg[2]));
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break;
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case 0xB0:
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STORE (SEQ_CONTROL (synthno, msg[0] & 0x0f,
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msg[1], msg[2]));
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break;
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case 0xC0:
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STORE (SEQ_SET_PATCH (synthno, msg[0] & 0x0f, msg[1]));
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break;
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case 0xD0:
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STORE (SEQ_CHN_PRESSURE (synthno, msg[0] & 0x0f, msg[1]));
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break;
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case 0xE0:
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STORE (SEQ_BENDER (synthno, msg[0] & 0x0f,
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(msg[1] % 0x7f) | ((msg[2] & 0x7f) << 7)));
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break;
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default:
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printk ("MPU: Unknown midi channel message %02x\n", msg[0]);
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}
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}
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static void
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midi_outc (int midi_dev, int data)
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{
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int timeout;
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for (timeout = 0; timeout < 32000; timeout++)
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if (midi_devs[midi_dev]->putc (midi_dev, (unsigned char) (data & 0xff)))
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{
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if (data & 0x80) /*
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* Status byte
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*/
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prev_out_status[midi_dev] =
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(unsigned char) (data & 0xff); /*
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* Store for running status
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*/
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return; /*
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* Mission complete
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*/
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}
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/*
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* Sorry! No space on buffers.
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*/
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printk ("Midi send timed out\n");
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}
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static int
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prefix_cmd (int midi_dev, unsigned char status)
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{
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if ((char *) midi_devs[midi_dev]->prefix_cmd == NULL)
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return 1;
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return midi_devs[midi_dev]->prefix_cmd (midi_dev, status);
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}
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static void
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midi_synth_input (int dev, unsigned char data)
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{
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int orig_dev;
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struct midi_input_info *inc;
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static unsigned char len_tab[] = /* # of data bytes following a status
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*/
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{
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2, /* 8x */
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2, /* 9x */
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2, /* Ax */
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2, /* Bx */
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1, /* Cx */
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1, /* Dx */
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2, /* Ex */
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0 /* Fx */
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};
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if (dev < 0 || dev > num_synths)
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return;
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if (data == 0xfe) /* Ignore active sensing */
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return;
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orig_dev = midi2synth[dev];
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inc = &midi_devs[orig_dev]->in_info;
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switch (inc->m_state)
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{
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case MST_INIT:
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if (data & 0x80) /* MIDI status byte */
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{
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if ((data & 0xf0) == 0xf0) /* Common message */
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{
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switch (data)
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{
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case 0xf0: /* Sysex */
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inc->m_state = MST_SYSEX;
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break; /* Sysex */
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case 0xf1: /* MTC quarter frame */
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case 0xf3: /* Song select */
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inc->m_state = MST_DATA;
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inc->m_ptr = 1;
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inc->m_left = 1;
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inc->m_buf[0] = data;
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break;
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case 0xf2: /* Song position pointer */
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inc->m_state = MST_DATA;
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inc->m_ptr = 1;
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inc->m_left = 2;
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inc->m_buf[0] = data;
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break;
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default:
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inc->m_buf[0] = data;
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inc->m_ptr = 1;
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do_midi_msg (dev, inc->m_buf, inc->m_ptr);
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inc->m_ptr = 0;
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inc->m_left = 0;
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}
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}
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else
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{
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inc->m_state = MST_DATA;
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inc->m_ptr = 1;
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inc->m_left = len_tab[(data >> 4) - 8];
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inc->m_buf[0] = inc->m_prev_status = data;
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}
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}
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else if (inc->m_prev_status & 0x80) /* Ignore if no previous status (yet) */
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{ /* Data byte (use running status) */
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inc->m_state = MST_DATA;
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inc->m_ptr = 2;
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inc->m_left = len_tab[(data >> 4) - 8] - 1;
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inc->m_buf[0] = inc->m_prev_status;
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inc->m_buf[1] = data;
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}
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break; /* MST_INIT */
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case MST_DATA:
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inc->m_buf[inc->m_ptr++] = data;
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if (--inc->m_left <= 0)
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{
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inc->m_state = MST_INIT;
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do_midi_msg (dev, inc->m_buf, inc->m_ptr);
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inc->m_ptr = 0;
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}
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break; /* MST_DATA */
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case MST_SYSEX:
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if (data == 0xf7) /* Sysex end */
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{
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inc->m_state = MST_INIT;
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inc->m_left = 0;
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inc->m_ptr = 0;
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}
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break; /* MST_SYSEX */
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default:
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printk ("MIDI%d: Unexpected state %d (%02x)\n", orig_dev, inc->m_state,
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(int) data);
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inc->m_state = MST_INIT;
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}
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}
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static void
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midi_synth_output (int dev)
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{
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/*
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* Currently NOP
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*/
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}
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int
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midi_synth_ioctl (int dev,
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unsigned int cmd, unsigned int arg)
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{
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/*
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* int orig_dev = synth_devs[dev]->midi_dev;
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*/
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switch (cmd)
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{
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case SNDCTL_SYNTH_INFO:
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IOCTL_TO_USER ((char *) arg, 0, synth_devs[dev]->info,
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sizeof (struct synth_info));
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return 0;
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break;
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case SNDCTL_SYNTH_MEMAVL:
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return 0x7fffffff;
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break;
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default:
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return RET_ERROR (EINVAL);
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}
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}
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int
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midi_synth_kill_note (int dev, int channel, int note, int velocity)
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{
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int orig_dev = synth_devs[dev]->midi_dev;
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int msg, chn;
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if (note < 0 || note > 127)
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return 0;
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if (channel < 0 || channel > 15)
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return 0;
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if (velocity < 0)
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velocity = 0;
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if (velocity > 127)
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velocity = 127;
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msg = prev_out_status[orig_dev] & 0xf0;
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chn = prev_out_status[orig_dev] & 0x0f;
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if (chn == channel && ((msg == 0x90 && velocity == 64) || msg == 0x80))
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{ /*
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* Use running status
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*/
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if (!prefix_cmd (orig_dev, note))
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return 0;
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midi_outc (orig_dev, note);
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if (msg == 0x90) /*
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* Running status = Note on
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*/
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midi_outc (orig_dev, 0); /*
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* Note on with velocity 0 == note
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* off
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*/
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else
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midi_outc (orig_dev, velocity);
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}
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else
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{
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if (velocity == 64)
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{
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if (!prefix_cmd (orig_dev, 0x90 | (channel & 0x0f)))
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return 0;
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midi_outc (orig_dev, 0x90 | (channel & 0x0f)); /*
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* Note on
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*/
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midi_outc (orig_dev, note);
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midi_outc (orig_dev, 0); /*
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* Zero G
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*/
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}
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else
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{
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if (!prefix_cmd (orig_dev, 0x80 | (channel & 0x0f)))
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return 0;
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midi_outc (orig_dev, 0x80 | (channel & 0x0f)); /*
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* Note off
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*/
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midi_outc (orig_dev, note);
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midi_outc (orig_dev, velocity);
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}
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}
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return 0;
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}
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int
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midi_synth_set_instr (int dev, int channel, int instr_no)
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{
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int orig_dev = synth_devs[dev]->midi_dev;
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if (instr_no < 0 || instr_no > 127)
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return 0;
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if (channel < 0 || channel > 15)
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return 0;
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if (!prefix_cmd (orig_dev, 0xc0 | (channel & 0x0f)))
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return 0;
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midi_outc (orig_dev, 0xc0 | (channel & 0x0f)); /*
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* Program change
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*/
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midi_outc (orig_dev, instr_no);
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return 0;
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}
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int
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midi_synth_start_note (int dev, int channel, int note, int velocity)
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{
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int orig_dev = synth_devs[dev]->midi_dev;
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int msg, chn;
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if (note < 0 || note > 127)
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return 0;
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if (channel < 0 || channel > 15)
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return 0;
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if (velocity < 0)
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velocity = 0;
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if (velocity > 127)
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velocity = 127;
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msg = prev_out_status[orig_dev] & 0xf0;
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chn = prev_out_status[orig_dev] & 0x0f;
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if (chn == channel && msg == 0x90)
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{ /*
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* Use running status
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*/
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if (!prefix_cmd (orig_dev, note))
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return 0;
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midi_outc (orig_dev, note);
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midi_outc (orig_dev, velocity);
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}
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else
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{
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if (!prefix_cmd (orig_dev, 0x90 | (channel & 0x0f)))
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return 0;
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midi_outc (orig_dev, 0x90 | (channel & 0x0f)); /*
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* Note on
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*/
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midi_outc (orig_dev, note);
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midi_outc (orig_dev, velocity);
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}
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return 0;
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}
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void
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midi_synth_reset (int dev)
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{
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}
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int
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midi_synth_open (int dev, int mode)
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{
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int orig_dev = synth_devs[dev]->midi_dev;
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int err;
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unsigned long flags;
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struct midi_input_info *inc;
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if (orig_dev < 0 || orig_dev > num_midis)
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return RET_ERROR (ENXIO);
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midi2synth[orig_dev] = dev;
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prev_out_status[orig_dev] = 0;
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if ((err = midi_devs[orig_dev]->open (orig_dev, mode,
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midi_synth_input, midi_synth_output)) < 0)
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return err;
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inc = &midi_devs[orig_dev]->in_info;
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DISABLE_INTR (flags);
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inc->m_busy = 0;
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inc->m_state = MST_INIT;
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inc->m_ptr = 0;
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inc->m_left = 0;
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inc->m_prev_status = 0x00;
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RESTORE_INTR (flags);
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return 1;
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}
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void
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midi_synth_close (int dev)
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{
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int orig_dev = synth_devs[dev]->midi_dev;
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/*
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* Shut up the synths by sending just single active sensing message.
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*/
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midi_devs[orig_dev]->putc (orig_dev, 0xfe);
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midi_devs[orig_dev]->close (orig_dev);
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}
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void
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midi_synth_hw_control (int dev, unsigned char *event)
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{
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}
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int
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midi_synth_load_patch (int dev, int format, snd_rw_buf * addr,
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int offs, int count, int pmgr_flag)
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{
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int orig_dev = synth_devs[dev]->midi_dev;
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struct sysex_info sysex;
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int i;
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unsigned long left, src_offs, eox_seen = 0;
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int first_byte = 1;
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int hdr_size = (unsigned long) &sysex.data[0] - (unsigned long) &sysex;
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if (!prefix_cmd (orig_dev, 0xf0))
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return 0;
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if (format != SYSEX_PATCH)
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{
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printk ("MIDI Error: Invalid patch format (key) 0x%x\n", format);
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return RET_ERROR (EINVAL);
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}
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if (count < hdr_size)
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{
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printk ("MIDI Error: Patch header too short\n");
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return RET_ERROR (EINVAL);
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}
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count -= hdr_size;
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/*
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* Copy the header from user space but ignore the first bytes which have
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* been transferred already.
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*/
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COPY_FROM_USER (&((char *) &sysex)[offs], addr, offs, hdr_size - offs);
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if (count < sysex.len)
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{
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printk ("MIDI Warning: Sysex record too short (%d<%d)\n",
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count, (int) sysex.len);
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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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RESET_WAIT_QUEUE (sysex_sleeper, sysex_sleep_flag);
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for (i = 0; i < left && !PROCESS_ABORTING (sysex_sleeper, sysex_sleep_flag); i++)
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{
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unsigned char data;
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GET_BYTE_FROM_USER (data, addr, hdr_size + i);
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eox_seen = (i > 0 && data & 0x80); /* End of sysex */
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if (eox_seen && data != 0xf7)
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data = 0xf7;
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if (i == 0)
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{
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if (data != 0xf0)
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{
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printk ("Error: Sysex start missing\n");
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return RET_ERROR (EINVAL);
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}
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}
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while (!midi_devs[orig_dev]->putc (orig_dev, (unsigned char) (data & 0xff)) &&
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!PROCESS_ABORTING (sysex_sleeper, sysex_sleep_flag))
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DO_SLEEP (sysex_sleeper, sysex_sleep_flag, 1); /* Wait for timeout */
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if (!first_byte && data & 0x80)
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return 0;
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first_byte = 0;
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}
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if (!eox_seen)
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midi_outc (orig_dev, 0xf7);
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return 0;
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}
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void
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midi_synth_panning (int dev, int channel, int pressure)
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{
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}
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void
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midi_synth_aftertouch (int dev, int channel, int pressure)
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{
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int orig_dev = synth_devs[dev]->midi_dev;
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int msg, chn;
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if (pressure < 0 || pressure > 127)
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return;
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if (channel < 0 || channel > 15)
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return;
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msg = prev_out_status[orig_dev] & 0xf0;
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chn = prev_out_status[orig_dev] & 0x0f;
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if (msg != 0xd0 || chn != channel) /*
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|
* Test for running status
|
|
*/
|
|
{
|
|
if (!prefix_cmd (orig_dev, 0xd0 | (channel & 0x0f)))
|
|
return;
|
|
midi_outc (orig_dev, 0xd0 | (channel & 0x0f)); /*
|
|
* Channel pressure
|
|
*/
|
|
}
|
|
else if (!prefix_cmd (orig_dev, pressure))
|
|
return;
|
|
|
|
midi_outc (orig_dev, pressure);
|
|
}
|
|
|
|
void
|
|
midi_synth_controller (int dev, int channel, int ctrl_num, int value)
|
|
{
|
|
int orig_dev = synth_devs[dev]->midi_dev;
|
|
int chn, msg;
|
|
|
|
if (ctrl_num < 1 || ctrl_num > 127)
|
|
return; /* NOTE! Controller # 0 ignored */
|
|
if (channel < 0 || channel > 15)
|
|
return;
|
|
|
|
msg = prev_out_status[orig_dev] & 0xf0;
|
|
chn = prev_out_status[orig_dev] & 0x0f;
|
|
|
|
if (msg != 0xb0 || chn != channel)
|
|
{
|
|
if (!prefix_cmd (orig_dev, 0xb0 | (channel & 0x0f)))
|
|
return;
|
|
midi_outc (orig_dev, 0xb0 | (channel & 0x0f));
|
|
}
|
|
else if (!prefix_cmd (orig_dev, ctrl_num))
|
|
return;
|
|
|
|
midi_outc (orig_dev, ctrl_num);
|
|
midi_outc (orig_dev, value & 0x7f);
|
|
}
|
|
|
|
int
|
|
midi_synth_patchmgr (int dev, struct patmgr_info *rec)
|
|
{
|
|
return RET_ERROR (EINVAL);
|
|
}
|
|
|
|
void
|
|
midi_synth_bender (int dev, int channel, int value)
|
|
{
|
|
int orig_dev = synth_devs[dev]->midi_dev;
|
|
int msg, prev_chn;
|
|
|
|
if (channel < 0 || channel > 15)
|
|
return;
|
|
|
|
if (value < 0 || value > 16383)
|
|
return;
|
|
|
|
msg = prev_out_status[orig_dev] & 0xf0;
|
|
prev_chn = prev_out_status[orig_dev] & 0x0f;
|
|
|
|
if (msg != 0xd0 || prev_chn != channel) /*
|
|
* Test for running status
|
|
*/
|
|
{
|
|
if (!prefix_cmd (orig_dev, 0xe0 | (channel & 0x0f)))
|
|
return;
|
|
midi_outc (orig_dev, 0xe0 | (channel & 0x0f));
|
|
}
|
|
else if (!prefix_cmd (orig_dev, value & 0x7f))
|
|
return;
|
|
|
|
midi_outc (orig_dev, value & 0x7f);
|
|
midi_outc (orig_dev, (value >> 7) & 0x7f);
|
|
}
|
|
|
|
void
|
|
midi_synth_setup_voice (int dev, int voice, int channel)
|
|
{
|
|
}
|
|
|
|
#endif
|