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855 lines
21 KiB
855 lines
21 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright (c) by Uros Bizjak <[email protected]> |
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* |
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* Midi synth routines for OPL2/OPL3/OPL4 FM |
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*/ |
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|
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#undef DEBUG_ALLOC |
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#undef DEBUG_MIDI |
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|
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#include "opl3_voice.h" |
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#include <sound/asoundef.h> |
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|
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static void snd_opl3_note_off_unsafe(void *p, int note, int vel, |
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struct snd_midi_channel *chan); |
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/* |
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* The next table looks magical, but it certainly is not. Its values have |
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* been calculated as table[i]=8*log(i/64)/log(2) with an obvious exception |
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* for i=0. This log-table converts a linear volume-scaling (0..127) to a |
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* logarithmic scaling as present in the FM-synthesizer chips. so : Volume |
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* 64 = 0 db = relative volume 0 and: Volume 32 = -6 db = relative |
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* volume -8 it was implemented as a table because it is only 128 bytes and |
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* it saves a lot of log() calculations. (Rob Hooft <[email protected]>) |
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*/ |
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static const char opl3_volume_table[128] = |
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{ |
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-63, -48, -40, -35, -32, -29, -27, -26, |
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-24, -23, -21, -20, -19, -18, -18, -17, |
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-16, -15, -15, -14, -13, -13, -12, -12, |
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-11, -11, -10, -10, -10, -9, -9, -8, |
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-8, -8, -7, -7, -7, -6, -6, -6, |
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-5, -5, -5, -5, -4, -4, -4, -4, |
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-3, -3, -3, -3, -2, -2, -2, -2, |
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-2, -1, -1, -1, -1, 0, 0, 0, |
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0, 0, 0, 1, 1, 1, 1, 1, |
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1, 2, 2, 2, 2, 2, 2, 2, |
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3, 3, 3, 3, 3, 3, 3, 4, |
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4, 4, 4, 4, 4, 4, 4, 5, |
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5, 5, 5, 5, 5, 5, 5, 5, |
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6, 6, 6, 6, 6, 6, 6, 6, |
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6, 7, 7, 7, 7, 7, 7, 7, |
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7, 7, 7, 8, 8, 8, 8, 8 |
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}; |
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void snd_opl3_calc_volume(unsigned char *volbyte, int vel, |
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struct snd_midi_channel *chan) |
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{ |
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int oldvol, newvol, n; |
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int volume; |
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volume = (vel * chan->gm_volume * chan->gm_expression) / (127*127); |
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if (volume > 127) |
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volume = 127; |
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oldvol = OPL3_TOTAL_LEVEL_MASK - (*volbyte & OPL3_TOTAL_LEVEL_MASK); |
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newvol = opl3_volume_table[volume] + oldvol; |
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if (newvol > OPL3_TOTAL_LEVEL_MASK) |
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newvol = OPL3_TOTAL_LEVEL_MASK; |
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else if (newvol < 0) |
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newvol = 0; |
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n = OPL3_TOTAL_LEVEL_MASK - (newvol & OPL3_TOTAL_LEVEL_MASK); |
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*volbyte = (*volbyte & OPL3_KSL_MASK) | (n & OPL3_TOTAL_LEVEL_MASK); |
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} |
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/* |
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* Converts the note frequency to block and fnum values for the FM chip |
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*/ |
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static const short opl3_note_table[16] = |
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{ |
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305, 323, /* for pitch bending, -2 semitones */ |
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343, 363, 385, 408, 432, 458, 485, 514, 544, 577, 611, 647, |
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686, 726 /* for pitch bending, +2 semitones */ |
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}; |
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static void snd_opl3_calc_pitch(unsigned char *fnum, unsigned char *blocknum, |
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int note, struct snd_midi_channel *chan) |
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{ |
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int block = ((note / 12) & 0x07) - 1; |
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int idx = (note % 12) + 2; |
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int freq; |
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if (chan->midi_pitchbend) { |
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int pitchbend = chan->midi_pitchbend; |
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int segment; |
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if (pitchbend < -0x2000) |
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pitchbend = -0x2000; |
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if (pitchbend > 0x1FFF) |
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pitchbend = 0x1FFF; |
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segment = pitchbend / 0x1000; |
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freq = opl3_note_table[idx+segment]; |
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freq += ((opl3_note_table[idx+segment+1] - freq) * |
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(pitchbend % 0x1000)) / 0x1000; |
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} else { |
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freq = opl3_note_table[idx]; |
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} |
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*fnum = (unsigned char) freq; |
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*blocknum = ((freq >> 8) & OPL3_FNUM_HIGH_MASK) | |
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((block << 2) & OPL3_BLOCKNUM_MASK); |
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} |
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#ifdef DEBUG_ALLOC |
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static void debug_alloc(struct snd_opl3 *opl3, char *s, int voice) { |
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int i; |
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char *str = "x.24"; |
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printk(KERN_DEBUG "time %.5i: %s [%.2i]: ", opl3->use_time, s, voice); |
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for (i = 0; i < opl3->max_voices; i++) |
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printk(KERN_CONT "%c", *(str + opl3->voices[i].state + 1)); |
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printk(KERN_CONT "\n"); |
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} |
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#endif |
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/* |
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* Get a FM voice (channel) to play a note on. |
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*/ |
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static int opl3_get_voice(struct snd_opl3 *opl3, int instr_4op, |
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struct snd_midi_channel *chan) { |
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int chan_4op_1; /* first voice for 4op instrument */ |
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int chan_4op_2; /* second voice for 4op instrument */ |
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struct snd_opl3_voice *vp, *vp2; |
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unsigned int voice_time; |
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int i; |
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#ifdef DEBUG_ALLOC |
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char *alloc_type[3] = { "FREE ", "CHEAP ", "EXPENSIVE" }; |
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#endif |
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/* This is our "allocation cost" table */ |
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enum { |
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FREE = 0, CHEAP, EXPENSIVE, END |
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}; |
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/* Keeps track of what we are finding */ |
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struct best { |
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unsigned int time; |
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int voice; |
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} best[END]; |
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struct best *bp; |
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for (i = 0; i < END; i++) { |
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best[i].time = (unsigned int)(-1); /* XXX MAX_?INT really */ |
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best[i].voice = -1; |
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} |
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/* Look through all the channels for the most suitable. */ |
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for (i = 0; i < opl3->max_voices; i++) { |
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vp = &opl3->voices[i]; |
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if (vp->state == SNDRV_OPL3_ST_NOT_AVAIL) |
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/* skip unavailable channels, allocated by |
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drum voices or by bounded 4op voices) */ |
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continue; |
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voice_time = vp->time; |
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bp = best; |
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chan_4op_1 = ((i < 3) || (i > 8 && i < 12)); |
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chan_4op_2 = ((i > 2 && i < 6) || (i > 11 && i < 15)); |
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if (instr_4op) { |
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/* allocate 4op voice */ |
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/* skip channels unavailable to 4op instrument */ |
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if (!chan_4op_1) |
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continue; |
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if (vp->state) |
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/* kill one voice, CHEAP */ |
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bp++; |
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/* get state of bounded 2op channel |
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to be allocated for 4op instrument */ |
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vp2 = &opl3->voices[i + 3]; |
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if (vp2->state == SNDRV_OPL3_ST_ON_2OP) { |
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/* kill two voices, EXPENSIVE */ |
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bp++; |
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voice_time = max(voice_time, vp2->time); |
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} |
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} else { |
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/* allocate 2op voice */ |
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if ((chan_4op_1) || (chan_4op_2)) |
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/* use bounded channels for 2op, CHEAP */ |
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bp++; |
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else if (vp->state) |
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/* kill one voice on 2op channel, CHEAP */ |
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bp++; |
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/* raise kill cost to EXPENSIVE for all channels */ |
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if (vp->state) |
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bp++; |
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} |
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if (voice_time < bp->time) { |
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bp->time = voice_time; |
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bp->voice = i; |
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} |
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} |
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for (i = 0; i < END; i++) { |
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if (best[i].voice >= 0) { |
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#ifdef DEBUG_ALLOC |
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printk(KERN_DEBUG "%s %iop allocation on voice %i\n", |
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alloc_type[i], instr_4op ? 4 : 2, |
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best[i].voice); |
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#endif |
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return best[i].voice; |
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} |
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} |
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/* not found */ |
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return -1; |
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} |
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/* ------------------------------ */ |
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/* |
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* System timer interrupt function |
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*/ |
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void snd_opl3_timer_func(struct timer_list *t) |
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{ |
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struct snd_opl3 *opl3 = from_timer(opl3, t, tlist); |
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unsigned long flags; |
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int again = 0; |
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int i; |
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spin_lock_irqsave(&opl3->voice_lock, flags); |
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for (i = 0; i < opl3->max_voices; i++) { |
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struct snd_opl3_voice *vp = &opl3->voices[i]; |
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if (vp->state > 0 && vp->note_off_check) { |
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if (vp->note_off == jiffies) |
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snd_opl3_note_off_unsafe(opl3, vp->note, 0, |
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vp->chan); |
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else |
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again++; |
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} |
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} |
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spin_unlock_irqrestore(&opl3->voice_lock, flags); |
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spin_lock_irqsave(&opl3->sys_timer_lock, flags); |
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if (again) |
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mod_timer(&opl3->tlist, jiffies + 1); /* invoke again */ |
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else |
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opl3->sys_timer_status = 0; |
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spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); |
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} |
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/* |
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* Start system timer |
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*/ |
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static void snd_opl3_start_timer(struct snd_opl3 *opl3) |
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{ |
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unsigned long flags; |
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spin_lock_irqsave(&opl3->sys_timer_lock, flags); |
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if (! opl3->sys_timer_status) { |
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mod_timer(&opl3->tlist, jiffies + 1); |
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opl3->sys_timer_status = 1; |
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} |
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spin_unlock_irqrestore(&opl3->sys_timer_lock, flags); |
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} |
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/* ------------------------------ */ |
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static const int snd_opl3_oss_map[MAX_OPL3_VOICES] = { |
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0, 1, 2, 9, 10, 11, 6, 7, 8, 15, 16, 17, 3, 4 ,5, 12, 13, 14 |
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}; |
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/* |
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* Start a note. |
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*/ |
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void snd_opl3_note_on(void *p, int note, int vel, struct snd_midi_channel *chan) |
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{ |
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struct snd_opl3 *opl3; |
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int instr_4op; |
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int voice; |
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struct snd_opl3_voice *vp, *vp2; |
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unsigned short connect_mask; |
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unsigned char connection; |
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unsigned char vol_op[4]; |
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int extra_prg = 0; |
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unsigned short reg_side; |
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unsigned char op_offset; |
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unsigned char voice_offset; |
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unsigned short opl3_reg; |
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unsigned char reg_val; |
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unsigned char prg, bank; |
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int key = note; |
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unsigned char fnum, blocknum; |
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int i; |
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struct fm_patch *patch; |
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struct fm_instrument *fm; |
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unsigned long flags; |
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opl3 = p; |
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#ifdef DEBUG_MIDI |
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snd_printk(KERN_DEBUG "Note on, ch %i, inst %i, note %i, vel %i\n", |
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chan->number, chan->midi_program, note, vel); |
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#endif |
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/* in SYNTH mode, application takes care of voices */ |
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/* in SEQ mode, drum voice numbers are notes on drum channel */ |
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if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { |
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if (chan->drum_channel) { |
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/* percussion instruments are located in bank 128 */ |
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bank = 128; |
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prg = note; |
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} else { |
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bank = chan->gm_bank_select; |
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prg = chan->midi_program; |
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} |
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} else { |
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/* Prepare for OSS mode */ |
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if (chan->number >= MAX_OPL3_VOICES) |
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return; |
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/* OSS instruments are located in bank 127 */ |
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bank = 127; |
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prg = chan->midi_program; |
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} |
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spin_lock_irqsave(&opl3->voice_lock, flags); |
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if (use_internal_drums) { |
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snd_opl3_drum_switch(opl3, note, vel, 1, chan); |
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spin_unlock_irqrestore(&opl3->voice_lock, flags); |
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return; |
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} |
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__extra_prg: |
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patch = snd_opl3_find_patch(opl3, prg, bank, 0); |
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if (!patch) { |
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spin_unlock_irqrestore(&opl3->voice_lock, flags); |
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return; |
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} |
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fm = &patch->inst; |
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switch (patch->type) { |
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case FM_PATCH_OPL2: |
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instr_4op = 0; |
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break; |
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case FM_PATCH_OPL3: |
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if (opl3->hardware >= OPL3_HW_OPL3) { |
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instr_4op = 1; |
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break; |
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} |
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fallthrough; |
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default: |
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spin_unlock_irqrestore(&opl3->voice_lock, flags); |
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return; |
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} |
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#ifdef DEBUG_MIDI |
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snd_printk(KERN_DEBUG " --> OPL%i instrument: %s\n", |
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instr_4op ? 3 : 2, patch->name); |
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#endif |
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/* in SYNTH mode, application takes care of voices */ |
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/* in SEQ mode, allocate voice on free OPL3 channel */ |
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if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { |
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voice = opl3_get_voice(opl3, instr_4op, chan); |
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} else { |
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/* remap OSS voice */ |
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voice = snd_opl3_oss_map[chan->number]; |
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} |
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if (voice < 0) { |
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spin_unlock_irqrestore(&opl3->voice_lock, flags); |
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return; |
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} |
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if (voice < MAX_OPL2_VOICES) { |
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/* Left register block for voices 0 .. 8 */ |
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reg_side = OPL3_LEFT; |
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voice_offset = voice; |
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connect_mask = (OPL3_LEFT_4OP_0 << voice_offset) & 0x07; |
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} else { |
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/* Right register block for voices 9 .. 17 */ |
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reg_side = OPL3_RIGHT; |
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voice_offset = voice - MAX_OPL2_VOICES; |
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connect_mask = (OPL3_RIGHT_4OP_0 << voice_offset) & 0x38; |
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} |
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/* kill voice on channel */ |
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vp = &opl3->voices[voice]; |
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if (vp->state > 0) { |
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opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); |
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reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; |
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opl3->command(opl3, opl3_reg, reg_val); |
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} |
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if (instr_4op) { |
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vp2 = &opl3->voices[voice + 3]; |
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if (vp->state > 0) { |
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opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + |
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voice_offset + 3); |
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reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; |
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opl3->command(opl3, opl3_reg, reg_val); |
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} |
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} |
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/* set connection register */ |
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if (instr_4op) { |
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if ((opl3->connection_reg ^ connect_mask) & connect_mask) { |
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opl3->connection_reg |= connect_mask; |
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/* set connection bit */ |
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opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; |
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opl3->command(opl3, opl3_reg, opl3->connection_reg); |
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} |
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} else { |
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if ((opl3->connection_reg ^ ~connect_mask) & connect_mask) { |
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opl3->connection_reg &= ~connect_mask; |
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/* clear connection bit */ |
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opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; |
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opl3->command(opl3, opl3_reg, opl3->connection_reg); |
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} |
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} |
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#ifdef DEBUG_MIDI |
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snd_printk(KERN_DEBUG " --> setting OPL3 connection: 0x%x\n", |
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opl3->connection_reg); |
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#endif |
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/* |
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* calculate volume depending on connection |
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* between FM operators (see include/opl3.h) |
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*/ |
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for (i = 0; i < (instr_4op ? 4 : 2); i++) |
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vol_op[i] = fm->op[i].ksl_level; |
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connection = fm->feedback_connection[0] & 0x01; |
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if (instr_4op) { |
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connection <<= 1; |
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connection |= fm->feedback_connection[1] & 0x01; |
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snd_opl3_calc_volume(&vol_op[3], vel, chan); |
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switch (connection) { |
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case 0x03: |
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snd_opl3_calc_volume(&vol_op[2], vel, chan); |
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fallthrough; |
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case 0x02: |
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snd_opl3_calc_volume(&vol_op[0], vel, chan); |
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break; |
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case 0x01: |
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snd_opl3_calc_volume(&vol_op[1], vel, chan); |
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} |
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} else { |
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snd_opl3_calc_volume(&vol_op[1], vel, chan); |
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if (connection) |
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snd_opl3_calc_volume(&vol_op[0], vel, chan); |
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} |
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/* Program the FM voice characteristics */ |
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for (i = 0; i < (instr_4op ? 4 : 2); i++) { |
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#ifdef DEBUG_MIDI |
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snd_printk(KERN_DEBUG " --> programming operator %i\n", i); |
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#endif |
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op_offset = snd_opl3_regmap[voice_offset][i]; |
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|
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/* Set OPL3 AM_VIB register of requested voice/operator */ |
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reg_val = fm->op[i].am_vib; |
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opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset); |
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opl3->command(opl3, opl3_reg, reg_val); |
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|
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/* Set OPL3 KSL_LEVEL register of requested voice/operator */ |
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reg_val = vol_op[i]; |
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opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset); |
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opl3->command(opl3, opl3_reg, reg_val); |
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|
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/* Set OPL3 ATTACK_DECAY register of requested voice/operator */ |
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reg_val = fm->op[i].attack_decay; |
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opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset); |
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opl3->command(opl3, opl3_reg, reg_val); |
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|
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/* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */ |
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reg_val = fm->op[i].sustain_release; |
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opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset); |
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opl3->command(opl3, opl3_reg, reg_val); |
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|
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/* Select waveform */ |
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reg_val = fm->op[i].wave_select; |
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opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset); |
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opl3->command(opl3, opl3_reg, reg_val); |
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} |
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|
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/* Set operator feedback and 2op inter-operator connection */ |
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reg_val = fm->feedback_connection[0]; |
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/* Set output voice connection */ |
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reg_val |= OPL3_STEREO_BITS; |
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if (chan->gm_pan < 43) |
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reg_val &= ~OPL3_VOICE_TO_RIGHT; |
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if (chan->gm_pan > 85) |
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reg_val &= ~OPL3_VOICE_TO_LEFT; |
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opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset); |
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opl3->command(opl3, opl3_reg, reg_val); |
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|
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if (instr_4op) { |
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/* Set 4op inter-operator connection */ |
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reg_val = fm->feedback_connection[1] & OPL3_CONNECTION_BIT; |
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/* Set output voice connection */ |
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reg_val |= OPL3_STEREO_BITS; |
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if (chan->gm_pan < 43) |
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reg_val &= ~OPL3_VOICE_TO_RIGHT; |
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if (chan->gm_pan > 85) |
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reg_val &= ~OPL3_VOICE_TO_LEFT; |
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opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + |
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voice_offset + 3); |
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opl3->command(opl3, opl3_reg, reg_val); |
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} |
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|
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/* |
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* Special treatment of percussion notes for fm: |
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* Requested pitch is really program, and pitch for |
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* device is whatever was specified in the patch library. |
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*/ |
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if (fm->fix_key) |
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note = fm->fix_key; |
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/* |
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* use transpose if defined in patch library |
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*/ |
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if (fm->trnsps) |
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note += (fm->trnsps - 64); |
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|
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snd_opl3_calc_pitch(&fnum, &blocknum, note, chan); |
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|
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/* Set OPL3 FNUM_LOW register of requested voice */ |
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opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); |
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opl3->command(opl3, opl3_reg, fnum); |
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|
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opl3->voices[voice].keyon_reg = blocknum; |
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|
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/* 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 |
|
}
|
|
|