diff options
Diffstat (limited to 'sys/i386/isa/sound/midi_synth.c')
-rw-r--r-- | sys/i386/isa/sound/midi_synth.c | 675 |
1 files changed, 675 insertions, 0 deletions
diff --git a/sys/i386/isa/sound/midi_synth.c b/sys/i386/isa/sound/midi_synth.c new file mode 100644 index 0000000..e63b24a --- /dev/null +++ b/sys/i386/isa/sound/midi_synth.c @@ -0,0 +1,675 @@ +/* + * sound/midi_synth.c + * + * High level midi sequencer manager for dumb MIDI interfaces. + * + * Copyright by Hannu Savolainen 1993 + * + * 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. + * + */ + +#define USE_SEQ_MACROS +#define USE_SIMPLE_MACROS + +#include <stddef.h> + +#include <i386/isa/sound/sound_config.h> + +#if defined(CONFIGURE_SOUNDCARD) /* && defined(CONFIG_MIDI) */ + +#define _MIDI_SYNTH_C_ + +static int *sysex_sleeper = NULL; +static volatile struct snd_wait sysex_sleep_flag = {0}; + +#include <i386/isa/sound/midi_synth.h> + +static int midi2synth[MAX_MIDI_DEV]; +static int sysex_state[MAX_MIDI_DEV] = +{0}; +static unsigned char prev_out_status[MAX_MIDI_DEV]; + +#ifndef CONFIG_SEQUENCER +#define STORE(cmd) +#else +#define STORE(cmd) { \ + int len; \ + unsigned char obuf[8]; \ + cmd; \ + seq_input_event(obuf, len); \ +} +#endif + +#define _seqbuf obuf +#define _seqbufptr 0 +#define _SEQ_ADVBUF(x) len=x + +void +do_midi_msg(int synthno, unsigned char *msg, int mlen) +{ + switch (msg[0] & 0xf0) { + case 0x90: + if (msg[2] != 0) { + STORE(SEQ_START_NOTE(synthno, msg[0] & 0x0f, msg[1], msg[2])); + break; + } + msg[2] = 64; + + case 0x80: + STORE(SEQ_STOP_NOTE(synthno, msg[0] & 0x0f, msg[1], msg[2])); + break; + + case 0xA0: + STORE(SEQ_KEY_PRESSURE(synthno, msg[0] & 0x0f, msg[1], msg[2])); + break; + + case 0xB0: + STORE(SEQ_CONTROL(synthno, msg[0] & 0x0f, msg[1], msg[2])); + break; + + case 0xC0: + STORE(SEQ_SET_PATCH(synthno, msg[0] & 0x0f, msg[1])); + break; + + case 0xD0: + STORE(SEQ_CHN_PRESSURE(synthno, msg[0] & 0x0f, msg[1])); + break; + + case 0xE0: + STORE(SEQ_BENDER(synthno, msg[0] & 0x0f, + (msg[1] % 0x7f) | ((msg[2] & 0x7f) << 7))); + break; + + default: + /* + * printf ("MPU: Unknown midi channel message %02x\n", + * msg[0]); + */ + ; + } +} + +static void +midi_outc(int midi_dev, int data) +{ + int timeout; + + for (timeout = 0; timeout < 32000; timeout++) + if (midi_devs[midi_dev]->putc(midi_dev, (unsigned char) (data & 0xff))) { + if (data & 0x80) /* Status byte */ + prev_out_status[midi_dev] = + (unsigned char) (data & 0xff); /* Store for running + * status */ + return; /* Mission complete */ + } + /* + * Sorry! No space on buffers. + */ + printf("Midi send timed out\n"); +} + +static int +prefix_cmd(int midi_dev, unsigned char status) +{ + if ((char *) midi_devs[midi_dev]->prefix_cmd == NULL) + return 1; + + return midi_devs[midi_dev]->prefix_cmd(midi_dev, status); +} + +static void +midi_synth_input(int orig_dev, unsigned char data) +{ + int dev; + struct midi_input_info *inc; + + static unsigned char len_tab[] = /* # of data bytes following a status */ + { + 2, /* 8x */ + 2, /* 9x */ + 2, /* Ax */ + 2, /* Bx */ + 1, /* Cx */ + 1, /* Dx */ + 2, /* Ex */ + 0 /* Fx */ + }; + + if (orig_dev < 0 || orig_dev > num_midis) + return; + + if (data == 0xfe) /* Ignore active sensing */ + return; + + dev = midi2synth[orig_dev]; + inc = &midi_devs[orig_dev]->in_info; + + switch (inc->m_state) { + case MST_INIT: + if (data & 0x80) { /* MIDI status byte */ + if ((data & 0xf0) == 0xf0) { /* Common message */ + switch (data) { + case 0xf0: /* Sysex */ + inc->m_state = MST_SYSEX; + break; /* Sysex */ + + case 0xf1: /* MTC quarter frame */ + case 0xf3: /* Song select */ + inc->m_state = MST_DATA; + inc->m_ptr = 1; + inc->m_left = 1; + inc->m_buf[0] = data; + break; + + case 0xf2: /* Song position pointer */ + inc->m_state = MST_DATA; + inc->m_ptr = 1; + inc->m_left = 2; + inc->m_buf[0] = data; + break; + + default: + inc->m_buf[0] = data; + inc->m_ptr = 1; + do_midi_msg(dev, inc->m_buf, inc->m_ptr); + inc->m_ptr = 0; + inc->m_left = 0; + } + } else { + inc->m_state = MST_DATA; + inc->m_ptr = 1; + inc->m_left = len_tab[(data >> 4) - 8]; + inc->m_buf[0] = inc->m_prev_status = data; + } + } else if (inc->m_prev_status & 0x80) { /* Ignore if no previous + * status (yet) *//* Data byte (use running status) */ + inc->m_state = MST_DATA; + inc->m_ptr = 2; + inc->m_left = len_tab[(data >> 4) - 8] - 1; + inc->m_buf[0] = inc->m_prev_status; + inc->m_buf[1] = data; + } + break; /* MST_INIT */ + + case MST_DATA: + inc->m_buf[inc->m_ptr++] = data; + if (--inc->m_left <= 0) { + inc->m_state = MST_INIT; + do_midi_msg(dev, inc->m_buf, inc->m_ptr); + inc->m_ptr = 0; + } + break; /* MST_DATA */ + + case MST_SYSEX: + if (data == 0xf7) { /* Sysex end */ + inc->m_state = MST_INIT; + inc->m_left = 0; + inc->m_ptr = 0; + } + break; /* MST_SYSEX */ + + default: + printf("MIDI%d: Unexpected state %d (%02x)\n", orig_dev, inc->m_state, + (int) data); + inc->m_state = MST_INIT; + } +} + +static void +leave_sysex(int dev) +{ + int orig_dev = synth_devs[dev]->midi_dev; + int timeout = 0; + + if (!sysex_state[dev]) + return; + + sysex_state[dev] = 0; + + while (!midi_devs[orig_dev]->putc(orig_dev, 0xf7) && timeout < 1000) + timeout++; + + sysex_state[dev] = 0; +} + +static void +midi_synth_output(int dev) +{ + /* + * Currently NOP + */ +} + +int +midi_synth_ioctl(int dev, unsigned int cmd, ioctl_arg arg) +{ + /* + * int orig_dev = synth_devs[dev]->midi_dev; + */ + + switch (cmd) { + + case SNDCTL_SYNTH_INFO: + bcopy(synth_devs[dev]->info, &(((char *) arg)[0]), sizeof(struct synth_info)); + return 0; + break; + + case SNDCTL_SYNTH_MEMAVL: + return 0x7fffffff; + break; + + default: + return -(EINVAL); + } +} + +int +midi_synth_kill_note(int dev, int channel, int note, int velocity) +{ + int orig_dev = synth_devs[dev]->midi_dev; + int msg, chn; + + if (note < 0 || note > 127) + return 0; + if (channel < 0 || channel > 15) + return 0; + RANGE (velocity, 0, 127 ) ; + leave_sysex(dev); + + msg = prev_out_status[orig_dev] & 0xf0; + chn = prev_out_status[orig_dev] & 0x0f; + + if (chn == channel && ((msg == 0x90 && velocity == 64) || msg == 0x80)) { /* Use running status */ + if (!prefix_cmd(orig_dev, note)) + return 0; + + midi_outc(orig_dev, note); + + if (msg == 0x90)/* Running status = Note on */ + midi_outc(orig_dev, 0); /* Note on with velocity 0 == note off */ + else + midi_outc(orig_dev, velocity); + } else { + if (velocity == 64) { + if (!prefix_cmd(orig_dev, 0x90 | (channel & 0x0f))) + return 0; + midi_outc(orig_dev, 0x90 | (channel & 0x0f)); /* Note on */ + midi_outc(orig_dev, note); + midi_outc(orig_dev, 0); /* Zero G */ + } else { + if (!prefix_cmd(orig_dev, 0x80 | (channel & 0x0f))) + return 0; + midi_outc(orig_dev, 0x80 | (channel & 0x0f)); /* Note off */ + midi_outc(orig_dev, note); + midi_outc(orig_dev, velocity); + } + } + + return 0; +} + +int +midi_synth_set_instr(int dev, int channel, int instr_no) +{ + int orig_dev = synth_devs[dev]->midi_dev; + + if (instr_no < 0 || instr_no > 127) + return 0; + if (channel < 0 || channel > 15) + return 0; + + leave_sysex(dev); + + if (!prefix_cmd(orig_dev, 0xc0 | (channel & 0x0f))) + return 0; + midi_outc(orig_dev, 0xc0 | (channel & 0x0f)); /* Program change */ + midi_outc(orig_dev, instr_no); + + return 0; +} + +int +midi_synth_start_note(int dev, int channel, int note, int velocity) +{ + int orig_dev = synth_devs[dev]->midi_dev; + int msg, chn; + + if (note < 0 || note > 127) + return 0; + if (channel < 0 || channel > 15) + return 0; + RANGE (velocity, 0, 127 ); + leave_sysex(dev); + + msg = prev_out_status[orig_dev] & 0xf0; + chn = prev_out_status[orig_dev] & 0x0f; + + if (chn == channel && msg == 0x90) { /* Use running status */ + if (!prefix_cmd(orig_dev, note)) + return 0; + midi_outc(orig_dev, note); + midi_outc(orig_dev, velocity); + } else { + if (!prefix_cmd(orig_dev, 0x90 | (channel & 0x0f))) + return 0; + midi_outc(orig_dev, 0x90 | (channel & 0x0f)); /* Note on */ + midi_outc(orig_dev, note); + midi_outc(orig_dev, velocity); + } + return 0; +} + +void +midi_synth_reset(int dev) +{ + + leave_sysex(dev); +} + +int +midi_synth_open(int dev, int mode) +{ + int orig_dev = synth_devs[dev]->midi_dev; + int err; + unsigned long flags; + struct midi_input_info *inc; + + if (orig_dev < 0 || orig_dev > num_midis) + return -(ENXIO); + + midi2synth[orig_dev] = dev; + sysex_state[dev] = 0; + prev_out_status[orig_dev] = 0; + + if ((err = midi_devs[orig_dev]->open(orig_dev, mode, + midi_synth_input, midi_synth_output)) < 0) + return err; + + inc = &midi_devs[orig_dev]->in_info; + + flags = splhigh(); + inc->m_busy = 0; + inc->m_state = MST_INIT; + inc->m_ptr = 0; + inc->m_left = 0; + inc->m_prev_status = 0x00; + splx(flags); + + sysex_sleep_flag.aborting = 0; + sysex_sleep_flag.mode = WK_NONE; + + return 1; +} + +void +midi_synth_close(int dev) +{ + int orig_dev = synth_devs[dev]->midi_dev; + + leave_sysex(dev); + + /* + * Shut up the synths by sending just single active sensing message. + */ + midi_devs[orig_dev]->putc(orig_dev, 0xfe); + + midi_devs[orig_dev]->close(orig_dev); +} + +void +midi_synth_hw_control(int dev, unsigned char *event) +{ +} + +int +midi_synth_load_patch(int dev, int format, snd_rw_buf * addr, + int offs, int count, int pmgr_flag) +{ + int orig_dev = synth_devs[dev]->midi_dev; + + struct sysex_info sysex; + int i; + unsigned long left, src_offs, eox_seen = 0; + int first_byte = 1; + int hdr_size = offsetof(struct sysex_info, data); + + leave_sysex(dev); + + if (!prefix_cmd(orig_dev, 0xf0)) + return 0; + + if (format != SYSEX_PATCH) { + printf("MIDI Error: Invalid patch format (key) 0x%x\n", format); + return -(EINVAL); + } + if (count < hdr_size) { + printf("MIDI Error: Patch header too short\n"); + return -(EINVAL); + } + count -= hdr_size; + + /* + * Copy the header from user space but ignore the first bytes which + * have been transferred already. + */ + + + if (uiomove(&((char *) &sysex)[offs], hdr_size - offs, addr)) { + printf("sb: Bad copyin()!\n"); + }; + + if (count < sysex.len) { + printf("MIDI Warning: Sysex record too short (%d<%d)\n", + count, (int) sysex.len); + sysex.len = count; + } + left = sysex.len; + src_offs = 0; + + sysex_sleep_flag.aborting = 0; + sysex_sleep_flag.mode = WK_NONE; + + for (i = 0; i < left && !(sysex_sleep_flag.aborting); i++) { + unsigned char data; + + uiomove((char *) &(data), 1, addr); + + eox_seen = (i > 0 && data & 0x80); /* End of sysex */ + + if (eox_seen && data != 0xf7) + data = 0xf7; + + if (i == 0) { + if (data != 0xf0) { + printf("Error: Sysex start missing\n"); + return -(EINVAL); + } + } + while (!midi_devs[orig_dev]->putc(orig_dev, + (unsigned char) (data & 0xff)) && + !(sysex_sleep_flag.aborting)) { + int chn; + + + sysex_sleeper = &chn; + DO_SLEEP(chn, sysex_sleep_flag, 1); + + }; /* Wait for timeout */ + + if (!first_byte && data & 0x80) + return 0; + first_byte = 0; + } + + if (!eox_seen) + midi_outc(orig_dev, 0xf7); + return 0; +} + +void +midi_synth_panning(int dev, int channel, int pressure) +{ +} + +void +midi_synth_aftertouch(int dev, int channel, int pressure) +{ + int orig_dev = synth_devs[dev]->midi_dev; + int msg, chn; + + if (pressure < 0 || pressure > 127) + return; + if (channel < 0 || channel > 15) + return; + + leave_sysex(dev); + + msg = prev_out_status[orig_dev] & 0xf0; + chn = prev_out_status[orig_dev] & 0x0f; + + if (msg != 0xd0 || chn != channel) { /* 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; + + leave_sysex(dev); + + 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 -(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; + + leave_sysex(dev); + + 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) +{ +} + +int +midi_synth_send_sysex(int dev, unsigned char *bytes, int len) +{ + int orig_dev = synth_devs[dev]->midi_dev; + int i; + + for (i = 0; i < len; i++) { + switch (bytes[i]) { + case 0xf0: /* Start sysex */ + if (!prefix_cmd(orig_dev, 0xf0)) + return 0; + sysex_state[dev] = 1; + break; + + case 0xf7: /* End sysex */ + if (!sysex_state[dev]) /* Orphan sysex end */ + return 0; + sysex_state[dev] = 0; + break; + + default: + if (!sysex_state[dev]) + return 0; + + if (bytes[i] & 0x80) { /* Error. Another message before sysex end */ + bytes[i] = 0xf7; /* Sysex end */ + sysex_state[dev] = 0; + } + } + + if (!midi_devs[orig_dev]->putc(orig_dev, bytes[i])) { + /* + * Hardware leve buffer is full. Abort the sysex message. + */ + + int timeout = 0; + + bytes[i] = 0xf7; + sysex_state[dev] = 0; + + while (!midi_devs[orig_dev]->putc(orig_dev, bytes[i]) && + timeout < 1000) + timeout++; + } + if (!sysex_state[dev]) + return 0; + } + + return 0; +} +#endif |