| /* |
| * 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> |
| |
| extern char snd_opl3_regmap[MAX_OPL2_VOICES][4]; |
| |
| extern bool use_internal_drums; |
| |
| 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; |
| } |
| 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 (vp->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) |
| { |
| struct snd_opl3 *opl3; |
| |
| opl3 = p; |
| #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) |
| { |
| struct snd_opl3 *opl3; |
| |
| opl3 = p; |
| #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) |
| { |
| struct snd_opl3 *opl3; |
| |
| opl3 = p; |
| #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) |
| { |
| struct snd_opl3 *opl3; |
| |
| opl3 = p; |
| #ifdef DEBUG_MIDI |
| snd_printk(KERN_DEBUG "SYSEX\n"); |
| #endif |
| } |
