diff options
Diffstat (limited to 'sound/drivers/opl3/opl3_midi.c')
| -rw-r--r-- | sound/drivers/opl3/opl3_midi.c | 870 |
1 files changed, 870 insertions, 0 deletions
diff --git a/sound/drivers/opl3/opl3_midi.c b/sound/drivers/opl3/opl3_midi.c new file mode 100644 index 000000000..4e77b1dca --- /dev/null +++ b/sound/drivers/opl3/opl3_midi.c @@ -0,0 +1,870 @@ +/* + * Copyright (c) by Uros Bizjak <uros@kss-loka.si> + * + * Midi synth routines for OPL2/OPL3/OPL4 FM + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#undef DEBUG_ALLOC +#undef DEBUG_MIDI + +#include "opl3_voice.h" +#include <sound/asoundef.h> + +static void snd_opl3_note_off_unsafe(void *p, int note, int vel, + struct snd_midi_channel *chan); +/* + * The next table looks magical, but it certainly is not. Its values have + * been calculated as table[i]=8*log(i/64)/log(2) with an obvious exception + * for i=0. This log-table converts a linear volume-scaling (0..127) to a + * logarithmic scaling as present in the FM-synthesizer chips. so : Volume + * 64 = 0 db = relative volume 0 and: Volume 32 = -6 db = relative + * volume -8 it was implemented as a table because it is only 128 bytes and + * it saves a lot of log() calculations. (Rob Hooft <hooft@chem.ruu.nl>) + */ + +static char opl3_volume_table[128] = +{ + -63, -48, -40, -35, -32, -29, -27, -26, + -24, -23, -21, -20, -19, -18, -18, -17, + -16, -15, -15, -14, -13, -13, -12, -12, + -11, -11, -10, -10, -10, -9, -9, -8, + -8, -8, -7, -7, -7, -6, -6, -6, + -5, -5, -5, -5, -4, -4, -4, -4, + -3, -3, -3, -3, -2, -2, -2, -2, + -2, -1, -1, -1, -1, 0, 0, 0, + 0, 0, 0, 1, 1, 1, 1, 1, + 1, 2, 2, 2, 2, 2, 2, 2, + 3, 3, 3, 3, 3, 3, 3, 4, + 4, 4, 4, 4, 4, 4, 4, 5, + 5, 5, 5, 5, 5, 5, 5, 5, + 6, 6, 6, 6, 6, 6, 6, 6, + 6, 7, 7, 7, 7, 7, 7, 7, + 7, 7, 7, 8, 8, 8, 8, 8 +}; + +void snd_opl3_calc_volume(unsigned char *volbyte, int vel, + struct snd_midi_channel *chan) +{ + int oldvol, newvol, n; + int volume; + + volume = (vel * chan->gm_volume * chan->gm_expression) / (127*127); + if (volume > 127) + volume = 127; + + oldvol = OPL3_TOTAL_LEVEL_MASK - (*volbyte & OPL3_TOTAL_LEVEL_MASK); + + newvol = opl3_volume_table[volume] + oldvol; + if (newvol > OPL3_TOTAL_LEVEL_MASK) + newvol = OPL3_TOTAL_LEVEL_MASK; + else if (newvol < 0) + newvol = 0; + + n = OPL3_TOTAL_LEVEL_MASK - (newvol & OPL3_TOTAL_LEVEL_MASK); + + *volbyte = (*volbyte & OPL3_KSL_MASK) | (n & OPL3_TOTAL_LEVEL_MASK); +} + +/* + * Converts the note frequency to block and fnum values for the FM chip + */ +static short opl3_note_table[16] = +{ + 305, 323, /* for pitch bending, -2 semitones */ + 343, 363, 385, 408, 432, 458, 485, 514, 544, 577, 611, 647, + 686, 726 /* for pitch bending, +2 semitones */ +}; + +static void snd_opl3_calc_pitch(unsigned char *fnum, unsigned char *blocknum, + int note, struct snd_midi_channel *chan) +{ + int block = ((note / 12) & 0x07) - 1; + int idx = (note % 12) + 2; + int freq; + + if (chan->midi_pitchbend) { + int pitchbend = chan->midi_pitchbend; + int segment; + + if (pitchbend < -0x2000) + pitchbend = -0x2000; + if (pitchbend > 0x1FFF) + pitchbend = 0x1FFF; + + segment = pitchbend / 0x1000; + freq = opl3_note_table[idx+segment]; + freq += ((opl3_note_table[idx+segment+1] - freq) * + (pitchbend % 0x1000)) / 0x1000; + } else { + freq = opl3_note_table[idx]; + } + + *fnum = (unsigned char) freq; + *blocknum = ((freq >> 8) & OPL3_FNUM_HIGH_MASK) | + ((block << 2) & OPL3_BLOCKNUM_MASK); +} + + +#ifdef DEBUG_ALLOC +static void debug_alloc(struct snd_opl3 *opl3, char *s, int voice) { + int i; + char *str = "x.24"; + + printk(KERN_DEBUG "time %.5i: %s [%.2i]: ", opl3->use_time, s, voice); + for (i = 0; i < opl3->max_voices; i++) + printk(KERN_CONT "%c", *(str + opl3->voices[i].state + 1)); + printk(KERN_CONT "\n"); +} +#endif + +/* + * Get a FM voice (channel) to play a note on. + */ +static int opl3_get_voice(struct snd_opl3 *opl3, int instr_4op, + struct snd_midi_channel *chan) { + int chan_4op_1; /* first voice for 4op instrument */ + int chan_4op_2; /* second voice for 4op instrument */ + + struct snd_opl3_voice *vp, *vp2; + unsigned int voice_time; + int i; + +#ifdef DEBUG_ALLOC + char *alloc_type[3] = { "FREE ", "CHEAP ", "EXPENSIVE" }; +#endif + + /* This is our "allocation cost" table */ + enum { + FREE = 0, CHEAP, EXPENSIVE, END + }; + + /* Keeps track of what we are finding */ + struct best { + unsigned int time; + int voice; + } best[END]; + struct best *bp; + + for (i = 0; i < END; i++) { + best[i].time = (unsigned int)(-1); /* XXX MAX_?INT really */ + best[i].voice = -1; + } + + /* Look through all the channels for the most suitable. */ + for (i = 0; i < opl3->max_voices; i++) { + vp = &opl3->voices[i]; + + if (vp->state == SNDRV_OPL3_ST_NOT_AVAIL) + /* skip unavailable channels, allocated by + drum voices or by bounded 4op voices) */ + continue; + + voice_time = vp->time; + bp = best; + + chan_4op_1 = ((i < 3) || (i > 8 && i < 12)); + chan_4op_2 = ((i > 2 && i < 6) || (i > 11 && i < 15)); + if (instr_4op) { + /* allocate 4op voice */ + /* skip channels unavailable to 4op instrument */ + if (!chan_4op_1) + continue; + + if (vp->state) + /* kill one voice, CHEAP */ + bp++; + /* get state of bounded 2op channel + to be allocated for 4op instrument */ + vp2 = &opl3->voices[i + 3]; + if (vp2->state == SNDRV_OPL3_ST_ON_2OP) { + /* kill two voices, EXPENSIVE */ + bp++; + voice_time = (voice_time > vp->time) ? + voice_time : vp->time; + } + } else { + /* allocate 2op voice */ + if ((chan_4op_1) || (chan_4op_2)) + /* use bounded channels for 2op, CHEAP */ + bp++; + else if (vp->state) + /* kill one voice on 2op channel, CHEAP */ + bp++; + /* raise kill cost to EXPENSIVE for all channels */ + if (vp->state) + bp++; + } + if (voice_time < bp->time) { + bp->time = voice_time; + bp->voice = i; + } + } + + for (i = 0; i < END; i++) { + if (best[i].voice >= 0) { +#ifdef DEBUG_ALLOC + printk(KERN_DEBUG "%s %iop allocation on voice %i\n", + alloc_type[i], instr_4op ? 4 : 2, + best[i].voice); +#endif + return best[i].voice; + } + } + /* not found */ + return -1; +} + +/* ------------------------------ */ + +/* + * System timer interrupt function + */ +void snd_opl3_timer_func(struct timer_list *t) +{ + + struct snd_opl3 *opl3 = from_timer(opl3, t, tlist); + unsigned long flags; + int again = 0; + int i; + + spin_lock_irqsave(&opl3->voice_lock, flags); + for (i = 0; i < opl3->max_voices; i++) { + struct snd_opl3_voice *vp = &opl3->voices[i]; + if (vp->state > 0 && vp->note_off_check) { + if (vp->note_off == jiffies) + snd_opl3_note_off_unsafe(opl3, vp->note, 0, + vp->chan); + else + again++; + } + } + spin_unlock_irqrestore(&opl3->voice_lock, flags); + + spin_lock_irqsave(&opl3->sys_timer_lock, flags); + if (again) + mod_timer(&opl3->tlist, jiffies + 1); /* invoke again */ + else + opl3->sys_timer_status = 0; + spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); +} + +/* + * Start system timer + */ +static void snd_opl3_start_timer(struct snd_opl3 *opl3) +{ + unsigned long flags; + spin_lock_irqsave(&opl3->sys_timer_lock, flags); + if (! opl3->sys_timer_status) { + mod_timer(&opl3->tlist, jiffies + 1); + opl3->sys_timer_status = 1; + } + spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); +} + +/* ------------------------------ */ + + +static int snd_opl3_oss_map[MAX_OPL3_VOICES] = { + 0, 1, 2, 9, 10, 11, 6, 7, 8, 15, 16, 17, 3, 4 ,5, 12, 13, 14 +}; + +/* + * Start a note. + */ +void snd_opl3_note_on(void *p, int note, int vel, struct snd_midi_channel *chan) +{ + struct snd_opl3 *opl3; + int instr_4op; + + int voice; + struct snd_opl3_voice *vp, *vp2; + unsigned short connect_mask; + unsigned char connection; + unsigned char vol_op[4]; + + int extra_prg = 0; + + unsigned short reg_side; + unsigned char op_offset; + unsigned char voice_offset; + unsigned short opl3_reg; + unsigned char reg_val; + unsigned char prg, bank; + + int key = note; + unsigned char fnum, blocknum; + int i; + + struct fm_patch *patch; + struct fm_instrument *fm; + unsigned long flags; + + opl3 = p; + +#ifdef DEBUG_MIDI + snd_printk(KERN_DEBUG "Note on, ch %i, inst %i, note %i, vel %i\n", + chan->number, chan->midi_program, note, vel); +#endif + + /* in SYNTH mode, application takes care of voices */ + /* in SEQ mode, drum voice numbers are notes on drum channel */ + if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { + if (chan->drum_channel) { + /* percussion instruments are located in bank 128 */ + bank = 128; + prg = note; + } else { + bank = chan->gm_bank_select; + prg = chan->midi_program; + } + } else { + /* Prepare for OSS mode */ + if (chan->number >= MAX_OPL3_VOICES) + return; + + /* OSS instruments are located in bank 127 */ + bank = 127; + prg = chan->midi_program; + } + + spin_lock_irqsave(&opl3->voice_lock, flags); + + if (use_internal_drums) { + snd_opl3_drum_switch(opl3, note, vel, 1, chan); + spin_unlock_irqrestore(&opl3->voice_lock, flags); + return; + } + + __extra_prg: + patch = snd_opl3_find_patch(opl3, prg, bank, 0); + if (!patch) { + spin_unlock_irqrestore(&opl3->voice_lock, flags); + return; + } + + fm = &patch->inst; + switch (patch->type) { + case FM_PATCH_OPL2: + instr_4op = 0; + break; + case FM_PATCH_OPL3: + if (opl3->hardware >= OPL3_HW_OPL3) { + instr_4op = 1; + break; + } + /* fall through */ + default: + spin_unlock_irqrestore(&opl3->voice_lock, flags); + return; + } +#ifdef DEBUG_MIDI + snd_printk(KERN_DEBUG " --> OPL%i instrument: %s\n", + instr_4op ? 3 : 2, patch->name); +#endif + /* in SYNTH mode, application takes care of voices */ + /* in SEQ mode, allocate voice on free OPL3 channel */ + if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { + voice = opl3_get_voice(opl3, instr_4op, chan); + } else { + /* remap OSS voice */ + voice = snd_opl3_oss_map[chan->number]; + } + + if (voice < 0) { + spin_unlock_irqrestore(&opl3->voice_lock, flags); + return; + } + + if (voice < MAX_OPL2_VOICES) { + /* Left register block for voices 0 .. 8 */ + reg_side = OPL3_LEFT; + voice_offset = voice; + connect_mask = (OPL3_LEFT_4OP_0 << voice_offset) & 0x07; + } else { + /* Right register block for voices 9 .. 17 */ + reg_side = OPL3_RIGHT; + voice_offset = voice - MAX_OPL2_VOICES; + connect_mask = (OPL3_RIGHT_4OP_0 << voice_offset) & 0x38; + } + + /* kill voice on channel */ + vp = &opl3->voices[voice]; + if (vp->state > 0) { + opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); + reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; + opl3->command(opl3, opl3_reg, reg_val); + } + if (instr_4op) { + vp2 = &opl3->voices[voice + 3]; + if (vp2->state > 0) { + opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + + voice_offset + 3); + reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; + opl3->command(opl3, opl3_reg, reg_val); + } + } + + /* set connection register */ + if (instr_4op) { + if ((opl3->connection_reg ^ connect_mask) & connect_mask) { + opl3->connection_reg |= connect_mask; + /* set connection bit */ + opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; + opl3->command(opl3, opl3_reg, opl3->connection_reg); + } + } else { + if ((opl3->connection_reg ^ ~connect_mask) & connect_mask) { + opl3->connection_reg &= ~connect_mask; + /* clear connection bit */ + opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; + opl3->command(opl3, opl3_reg, opl3->connection_reg); + } + } + +#ifdef DEBUG_MIDI + snd_printk(KERN_DEBUG " --> setting OPL3 connection: 0x%x\n", + opl3->connection_reg); +#endif + /* + * calculate volume depending on connection + * between FM operators (see include/opl3.h) + */ + for (i = 0; i < (instr_4op ? 4 : 2); i++) + vol_op[i] = fm->op[i].ksl_level; + + connection = fm->feedback_connection[0] & 0x01; + if (instr_4op) { + connection <<= 1; + connection |= fm->feedback_connection[1] & 0x01; + + snd_opl3_calc_volume(&vol_op[3], vel, chan); + switch (connection) { + case 0x03: + snd_opl3_calc_volume(&vol_op[2], vel, chan); + /* fallthru */ + case 0x02: + snd_opl3_calc_volume(&vol_op[0], vel, chan); + break; + case 0x01: + snd_opl3_calc_volume(&vol_op[1], vel, chan); + } + } else { + snd_opl3_calc_volume(&vol_op[1], vel, chan); + if (connection) + snd_opl3_calc_volume(&vol_op[0], vel, chan); + } + + /* Program the FM voice characteristics */ + for (i = 0; i < (instr_4op ? 4 : 2); i++) { +#ifdef DEBUG_MIDI + snd_printk(KERN_DEBUG " --> programming operator %i\n", i); +#endif + op_offset = snd_opl3_regmap[voice_offset][i]; + + /* Set OPL3 AM_VIB register of requested voice/operator */ + reg_val = fm->op[i].am_vib; + opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset); + opl3->command(opl3, opl3_reg, reg_val); + + /* Set OPL3 KSL_LEVEL register of requested voice/operator */ + reg_val = vol_op[i]; + opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset); + opl3->command(opl3, opl3_reg, reg_val); + + /* Set OPL3 ATTACK_DECAY register of requested voice/operator */ + reg_val = fm->op[i].attack_decay; + opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset); + opl3->command(opl3, opl3_reg, reg_val); + + /* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */ + reg_val = fm->op[i].sustain_release; + opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset); + opl3->command(opl3, opl3_reg, reg_val); + + /* Select waveform */ + reg_val = fm->op[i].wave_select; + opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset); + opl3->command(opl3, opl3_reg, reg_val); + } + + /* Set operator feedback and 2op inter-operator connection */ + reg_val = fm->feedback_connection[0]; + /* Set output voice connection */ + reg_val |= OPL3_STEREO_BITS; + if (chan->gm_pan < 43) + reg_val &= ~OPL3_VOICE_TO_RIGHT; + if (chan->gm_pan > 85) + reg_val &= ~OPL3_VOICE_TO_LEFT; + opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset); + opl3->command(opl3, opl3_reg, reg_val); + + if (instr_4op) { + /* Set 4op inter-operator connection */ + reg_val = fm->feedback_connection[1] & OPL3_CONNECTION_BIT; + /* Set output voice connection */ + reg_val |= OPL3_STEREO_BITS; + if (chan->gm_pan < 43) + reg_val &= ~OPL3_VOICE_TO_RIGHT; + if (chan->gm_pan > 85) + reg_val &= ~OPL3_VOICE_TO_LEFT; + opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + + voice_offset + 3); + opl3->command(opl3, opl3_reg, reg_val); + } + + /* + * Special treatment of percussion notes for fm: + * Requested pitch is really program, and pitch for + * device is whatever was specified in the patch library. + */ + if (fm->fix_key) + note = fm->fix_key; + /* + * use transpose if defined in patch library + */ + if (fm->trnsps) + note += (fm->trnsps - 64); + + snd_opl3_calc_pitch(&fnum, &blocknum, note, chan); + + /* Set OPL3 FNUM_LOW register of requested voice */ + opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); + opl3->command(opl3, opl3_reg, fnum); + + opl3->voices[voice].keyon_reg = blocknum; + + /* Set output sound flag */ + blocknum |= OPL3_KEYON_BIT; + +#ifdef DEBUG_MIDI + snd_printk(KERN_DEBUG " --> trigger voice %i\n", voice); +#endif + /* Set OPL3 KEYON_BLOCK register of requested voice */ + opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); + opl3->command(opl3, opl3_reg, blocknum); + + /* kill note after fixed duration (in centiseconds) */ + if (fm->fix_dur) { + opl3->voices[voice].note_off = jiffies + + (fm->fix_dur * HZ) / 100; + snd_opl3_start_timer(opl3); + opl3->voices[voice].note_off_check = 1; + } else + opl3->voices[voice].note_off_check = 0; + + /* get extra pgm, but avoid possible loops */ + extra_prg = (extra_prg) ? 0 : fm->modes; + + /* do the bookkeeping */ + vp->time = opl3->use_time++; + vp->note = key; + vp->chan = chan; + + if (instr_4op) { + vp->state = SNDRV_OPL3_ST_ON_4OP; + + vp2 = &opl3->voices[voice + 3]; + vp2->time = opl3->use_time++; + vp2->note = key; + vp2->chan = chan; + vp2->state = SNDRV_OPL3_ST_NOT_AVAIL; + } else { + if (vp->state == SNDRV_OPL3_ST_ON_4OP) { + /* 4op killed by 2op, release bounded voice */ + vp2 = &opl3->voices[voice + 3]; + vp2->time = opl3->use_time++; + vp2->state = SNDRV_OPL3_ST_OFF; + } + vp->state = SNDRV_OPL3_ST_ON_2OP; + } + +#ifdef DEBUG_ALLOC + debug_alloc(opl3, "note on ", voice); +#endif + + /* allocate extra program if specified in patch library */ + if (extra_prg) { + if (extra_prg > 128) { + bank = 128; + /* percussions start at 35 */ + prg = extra_prg - 128 + 35 - 1; + } else { + bank = 0; + prg = extra_prg - 1; + } +#ifdef DEBUG_MIDI + snd_printk(KERN_DEBUG " *** allocating extra program\n"); +#endif + goto __extra_prg; + } + spin_unlock_irqrestore(&opl3->voice_lock, flags); +} + +static void snd_opl3_kill_voice(struct snd_opl3 *opl3, int voice) +{ + unsigned short reg_side; + unsigned char voice_offset; + unsigned short opl3_reg; + + struct snd_opl3_voice *vp, *vp2; + + if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) + return; + + vp = &opl3->voices[voice]; + if (voice < MAX_OPL2_VOICES) { + /* Left register block for voices 0 .. 8 */ + reg_side = OPL3_LEFT; + voice_offset = voice; + } else { + /* Right register block for voices 9 .. 17 */ + reg_side = OPL3_RIGHT; + voice_offset = voice - MAX_OPL2_VOICES; + } + + /* kill voice */ +#ifdef DEBUG_MIDI + snd_printk(KERN_DEBUG " --> kill voice %i\n", voice); +#endif + opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); + /* clear Key ON bit */ + opl3->command(opl3, opl3_reg, vp->keyon_reg); + + /* do the bookkeeping */ + vp->time = opl3->use_time++; + + if (vp->state == SNDRV_OPL3_ST_ON_4OP) { + vp2 = &opl3->voices[voice + 3]; + + vp2->time = opl3->use_time++; + vp2->state = SNDRV_OPL3_ST_OFF; + } + vp->state = SNDRV_OPL3_ST_OFF; +#ifdef DEBUG_ALLOC + debug_alloc(opl3, "note off", voice); +#endif + +} + +/* + * Release a note in response to a midi note off. + */ +static void snd_opl3_note_off_unsafe(void *p, int note, int vel, + struct snd_midi_channel *chan) +{ + struct snd_opl3 *opl3; + + int voice; + struct snd_opl3_voice *vp; + + opl3 = p; + +#ifdef DEBUG_MIDI + snd_printk(KERN_DEBUG "Note off, ch %i, inst %i, note %i\n", + chan->number, chan->midi_program, note); +#endif + + if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { + if (chan->drum_channel && use_internal_drums) { + snd_opl3_drum_switch(opl3, note, vel, 0, chan); + return; + } + /* this loop will hopefully kill all extra voices, because + they are grouped by the same channel and note values */ + for (voice = 0; voice < opl3->max_voices; voice++) { + vp = &opl3->voices[voice]; + if (vp->state > 0 && vp->chan == chan && vp->note == note) { + snd_opl3_kill_voice(opl3, voice); + } + } + } else { + /* remap OSS voices */ + if (chan->number < MAX_OPL3_VOICES) { + voice = snd_opl3_oss_map[chan->number]; + snd_opl3_kill_voice(opl3, voice); + } + } +} + +void snd_opl3_note_off(void *p, int note, int vel, + struct snd_midi_channel *chan) +{ + struct snd_opl3 *opl3 = p; + unsigned long flags; + + spin_lock_irqsave(&opl3->voice_lock, flags); + snd_opl3_note_off_unsafe(p, note, vel, chan); + spin_unlock_irqrestore(&opl3->voice_lock, flags); +} + +/* + * key pressure change + */ +void snd_opl3_key_press(void *p, int note, int vel, struct snd_midi_channel *chan) +{ +#ifdef DEBUG_MIDI + snd_printk(KERN_DEBUG "Key pressure, ch#: %i, inst#: %i\n", + chan->number, chan->midi_program); +#endif +} + +/* + * terminate note + */ +void snd_opl3_terminate_note(void *p, int note, struct snd_midi_channel *chan) +{ +#ifdef DEBUG_MIDI + snd_printk(KERN_DEBUG "Terminate note, ch#: %i, inst#: %i\n", + chan->number, chan->midi_program); +#endif +} + +static void snd_opl3_update_pitch(struct snd_opl3 *opl3, int voice) +{ + unsigned short reg_side; + unsigned char voice_offset; + unsigned short opl3_reg; + + unsigned char fnum, blocknum; + + struct snd_opl3_voice *vp; + + if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) + return; + + vp = &opl3->voices[voice]; + if (vp->chan == NULL) + return; /* not allocated? */ + + if (voice < MAX_OPL2_VOICES) { + /* Left register block for voices 0 .. 8 */ + reg_side = OPL3_LEFT; + voice_offset = voice; + } else { + /* Right register block for voices 9 .. 17 */ + reg_side = OPL3_RIGHT; + voice_offset = voice - MAX_OPL2_VOICES; + } + + snd_opl3_calc_pitch(&fnum, &blocknum, vp->note, vp->chan); + + /* Set OPL3 FNUM_LOW register of requested voice */ + opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); + opl3->command(opl3, opl3_reg, fnum); + + vp->keyon_reg = blocknum; + + /* Set output sound flag */ + blocknum |= OPL3_KEYON_BIT; + + /* Set OPL3 KEYON_BLOCK register of requested voice */ + opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); + opl3->command(opl3, opl3_reg, blocknum); + + vp->time = opl3->use_time++; +} + +/* + * Update voice pitch controller + */ +static void snd_opl3_pitch_ctrl(struct snd_opl3 *opl3, struct snd_midi_channel *chan) +{ + int voice; + struct snd_opl3_voice *vp; + + unsigned long flags; + + spin_lock_irqsave(&opl3->voice_lock, flags); + + if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { + for (voice = 0; voice < opl3->max_voices; voice++) { + vp = &opl3->voices[voice]; + if (vp->state > 0 && vp->chan == chan) { + snd_opl3_update_pitch(opl3, voice); + } + } + } else { + /* remap OSS voices */ + if (chan->number < MAX_OPL3_VOICES) { + voice = snd_opl3_oss_map[chan->number]; + snd_opl3_update_pitch(opl3, voice); + } + } + spin_unlock_irqrestore(&opl3->voice_lock, flags); +} + +/* + * Deal with a controller type event. This includes all types of + * control events, not just the midi controllers + */ +void snd_opl3_control(void *p, int type, struct snd_midi_channel *chan) +{ + struct snd_opl3 *opl3; + + opl3 = p; +#ifdef DEBUG_MIDI + snd_printk(KERN_DEBUG "Controller, TYPE = %i, ch#: %i, inst#: %i\n", + type, chan->number, chan->midi_program); +#endif + + switch (type) { + case MIDI_CTL_MSB_MODWHEEL: + if (chan->control[MIDI_CTL_MSB_MODWHEEL] > 63) + opl3->drum_reg |= OPL3_VIBRATO_DEPTH; + else + opl3->drum_reg &= ~OPL3_VIBRATO_DEPTH; + opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, + opl3->drum_reg); + break; + case MIDI_CTL_E2_TREMOLO_DEPTH: + if (chan->control[MIDI_CTL_E2_TREMOLO_DEPTH] > 63) + opl3->drum_reg |= OPL3_TREMOLO_DEPTH; + else + opl3->drum_reg &= ~OPL3_TREMOLO_DEPTH; + opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, + opl3->drum_reg); + break; + case MIDI_CTL_PITCHBEND: + snd_opl3_pitch_ctrl(opl3, chan); + break; + } +} + +/* + * NRPN events + */ +void snd_opl3_nrpn(void *p, struct snd_midi_channel *chan, + struct snd_midi_channel_set *chset) +{ +#ifdef DEBUG_MIDI + snd_printk(KERN_DEBUG "NRPN, ch#: %i, inst#: %i\n", + chan->number, chan->midi_program); +#endif +} + +/* + * receive sysex + */ +void snd_opl3_sysex(void *p, unsigned char *buf, int len, + int parsed, struct snd_midi_channel_set *chset) +{ +#ifdef DEBUG_MIDI + snd_printk(KERN_DEBUG "SYSEX\n"); +#endif +} |