paulo@0: /*---------------------------------------------------------------------------------
paulo@0: 
paulo@0: 	LOCKJAW Tetromino Game: ARM7 sound code
paulo@0: 
paulo@0: 	based on
paulo@0: 	default ARM7 core
paulo@0: 
paulo@0: 	Copyright (C) 2007
paulo@0: 		Damian Yerrick (tepples)
paulo@0: 
paulo@0: 	This software is provided 'as-is', without any express or implied
paulo@0: 	warranty.  In no event will the authors be held liable for any
paulo@0: 	damages arising from the use of this software.
paulo@0: 
paulo@0: 	Permission is granted to anyone to use this software for any
paulo@0: 	purpose, including commercial applications, and to alter it and
paulo@0: 	redistribute it freely, subject to the following restrictions:
paulo@0: 
paulo@0: 	1.	The origin of this software must not be misrepresented; you
paulo@0: 		must not claim that you wrote the original software. If you use
paulo@0: 		this software in a product, an acknowledgment in the product
paulo@0: 		documentation would be appreciated but is not required.
paulo@0: 	2.	Altered source versions must be plainly marked as such, and
paulo@0: 		must not be misrepresented as being the original software.
paulo@0: 	3.	This notice may not be removed or altered from any source
paulo@0: 		distribution.
paulo@0: 
paulo@0: ---------------------------------------------------------------------------------*/
paulo@0: #include <nds.h>
paulo@0: #include <sys/types.h>
paulo@0: 
paulo@0: extern const unsigned short midi2psgFreq[120];
paulo@0: 
paulo@0: #define C(octave)  (octave * 12 +  0)
paulo@0: #define CS(octave) (octave * 12 +  1)
paulo@0: #define D(octave)  (octave * 12 +  2)
paulo@0: #define DS(octave) (octave * 12 +  3)
paulo@0: #define E(octave)  (octave * 12 +  4)
paulo@0: #define F(octave)  (octave * 12 +  5)
paulo@0: #define FS(octave) (octave * 12 +  6)
paulo@0: #define G(octave)  (octave * 12 +  7)
paulo@0: #define GS(octave) (octave * 12 +  8)
paulo@0: #define A(octave)  (octave * 12 +  9)
paulo@0: #define AS(octave) (octave * 12 + 10)
paulo@0: #define B(octave)  (octave * 12 + 11)
paulo@0: 
paulo@0: 
paulo@0: #define N_MUSIC_CHANNELS 2
paulo@0: 
paulo@0: static unsigned short chNote[N_MUSIC_CHANNELS];
paulo@0: static unsigned char chVol[N_MUSIC_CHANNELS];
paulo@0: 
paulo@0: 
paulo@0: static const unsigned char startVol[N_MUSIC_CHANNELS] = {32, 30};
paulo@0: static const unsigned char fade[N_MUSIC_CHANNELS] = {0, 1};
paulo@0: static const unsigned char chDuty[N_MUSIC_CHANNELS] = {0, 3};
paulo@0: 
paulo@0: static const signed char bassLine[64] = {
paulo@0:   A(2), 0, A(3), 0, -1, 0, A(2), 0,
paulo@0:   A(3), 0, -1, 0, 0, 0, 0, 0,
paulo@0:   0, 0, 0, 0, 0, 0, 0, 0,
paulo@0:   C(3), 0, C(4), 0, G(2), 0, G(3), 0,
paulo@0:   A(2), 0, A(3), 0, -1, 0, A(2), 0,
paulo@0:   A(3), 0, -1, 0, 0, 0, 0, 0,
paulo@0:   0, 0, 0, 0, 0, 0, 0, 0,
paulo@0:   C(3), 0, C(4), 0, G(2), 0, G(3), 0,
paulo@0: };
paulo@0: 
paulo@0: static const signed char mel1[64] = {
paulo@0:   E(6), 0, 0, 0, B(5), 0, C(6), 0,
paulo@0:   D(6), 0, 0, 0, C(6), 0, B(5), 0,
paulo@0:   A(5), 0, 0, 0, A(5), 0, C(6), 0,
paulo@0:   E(6), 0, 0, 0, D(6), 0, C(6), 0,
paulo@0:   B(5), 0, 0, 0, 0, 0, C(6), 0,
paulo@0:   D(6), 0, 0, 0, E(6), 0, 0, 0,
paulo@0:   C(6), 0, 0, 0, A(5), 0, 0, 0,
paulo@0:   A(5)
paulo@0: };
paulo@0: 
paulo@0: static const signed char mel2[64] = {
paulo@0:   0, 0, D(6), 0, 0, 0, F(6), 0,
paulo@0:   A(6), 0, 0, 0, G(6), 0, F(6), 0,
paulo@0:   E(6), 0, 0, 0, 0, 0, C(6), 0,
paulo@0:   E(6), 0, 0, 0, D(6), 0, C(6), 0,
paulo@0:   B(5), 0, 0, 0, B(5), 0, C(6), 0,
paulo@0:   D(6), 0, 0, 0, E(6), 0, 0, 0,
paulo@0:   C(6), 0, 0, 0, A(5), 0, 0, 0,
paulo@0:   A(5)
paulo@0: };
paulo@0: 
paulo@0: static const signed char *const scripts[4][N_MUSIC_CHANNELS] = {
paulo@0:   { bassLine, mel1 },
paulo@0:   { bassLine, mel1 },
paulo@0:   { bassLine, mel2 },
paulo@0:   { bassLine, mel2 }
paulo@0: };
paulo@0: 
paulo@0: int order = 0;
paulo@0: char ticksLeft = 1;
paulo@0: char row = 0;
paulo@0: char musicPaused = 1;
paulo@0: 
paulo@0: /*
paulo@0:  * Plays a repeating drum track and bass track.
paulo@0:  */
paulo@0: void ljMusic(void) {
paulo@0:   if (musicPaused) {
paulo@0:     for (int ch = 0; ch < N_MUSIC_CHANNELS; ++ch) {
paulo@0:       chVol[ch] = 0;
paulo@0:     }
paulo@0:   } else if (--ticksLeft <= 0) {
paulo@0:     ticksLeft += 6;
paulo@0:     for (int ch = 0; ch < N_MUSIC_CHANNELS; ++ch) {
paulo@0:       const signed char *script = scripts[order][ch];
paulo@0:       int note = script ? script[(int)row] : 0;
paulo@0:       if (note < 0) {
paulo@0:         chVol[ch] = 0;
paulo@0:       } else if (note > 0) {
paulo@0:         chVol[ch] = startVol[ch];
paulo@0:         chNote[ch] = midi2psgFreq[note];
paulo@0:       }
paulo@0:     }
paulo@0:     ++row;
paulo@0:     if (row >= 64) {
paulo@0:       row = 0;
paulo@0:       ++order;
paulo@0:       if (order == 4) {
paulo@0:         order = 0;
paulo@0:       }
paulo@0:     }
paulo@0:   }
paulo@0:   
paulo@0:   
paulo@0:   // Play notes
paulo@0:   for (int ch = 0; ch < N_MUSIC_CHANNELS; ++ch) {
paulo@0:     SCHANNEL_CR(8 + ch) = SCHANNEL_ENABLE | SOUND_FORMAT_PSG | SOUND_PAN(64)
paulo@0:                    | (chDuty[ch] << 24) | chVol[ch];
paulo@0:     SCHANNEL_TIMER(8 + ch) = chNote[ch];
paulo@0:     
paulo@0:     // update volumes
paulo@0:     if (chVol[ch] > fade[ch]) {
paulo@0:       chVol[ch] -= fade[ch];
paulo@0:     } else {
paulo@0:       chVol[ch] = 0;
paulo@0:     }
paulo@0:   }
paulo@0: }
paulo@0: 
paulo@0: #define FX(note, volume, duty) ((note) | ((volume) << 7) | ((duty) << 14))
paulo@0: 
paulo@0: static const u16 rotateEffect[] = {
paulo@0:   0, 6,
paulo@0:   FX(A(5), 32, 1), FX(A(5), 8, 1),
paulo@0:   FX(D(6), 32, 1), FX(D(6), 8, 1),
paulo@0:   FX(G(6), 32, 1), FX(G(6), 8, 1)
paulo@0: };
paulo@0: 
paulo@0: static const u16 moveEffect[] = {
paulo@0:   0, 2,
paulo@0:   FX(A(6), 32, 1), FX(A(6), 8, 1)
paulo@0: };
paulo@0: 
paulo@0: static const u16 landEffect[] = {
paulo@0:   0, 8,
paulo@0:   FX(C(4), 64, 3), FX(GS(3), 56, 3),
paulo@0:   FX(F(3), 48, 3), FX(D(3), 40, 3),
paulo@0:   FX(C(3), 32, 3), FX(B(2), 24, 3),
paulo@0:   FX(C(3), 16, 3), FX(B(2), 8, 3),
paulo@0: };
paulo@0: 
paulo@0: static const u16 lockEffect[] = {
paulo@0:   1, 2,
paulo@0:   FX(C(8), 16, 1), FX(C(8), 4, 1)
paulo@0: };
paulo@0: 
paulo@0: static const u16 lineEffect[] = {
paulo@0:   0, 15,
paulo@0:   FX(C(6), 64, 2), FX(DS(6), 59, 2), FX(F(6), 54, 2),
paulo@0:   FX(C(6), 49, 2), FX(D(6), 44, 2), FX(F(6), 39, 2),
paulo@0:   FX(C(6), 34, 3), FX(DS(6), 29, 3), FX(F(6), 24, 3),
paulo@0:   FX(C(6), 20, 3), FX(D(6), 16, 3), FX(F(6), 12, 3),
paulo@0:   FX(C(6), 9, 3), FX(DS(6), 6, 3), FX(F(6), 3, 3)
paulo@0: };
paulo@0: 
paulo@0: static const u16 homerEffect[] = {
paulo@0:   0, 25,
paulo@0:   FX(C(6), 64, 2), FX(DS(6), 59, 2), FX(F(6), 54, 2),
paulo@0:   FX(C(6), 49, 2), FX(D(6), 44, 2), FX(F(6), 39, 2),
paulo@0:   FX(C(6), 34, 3), FX(DS(6), 29, 3), FX(F(6), 24, 3),
paulo@0:   FX(C(6), 20, 3),
paulo@0:   FX(DS(6), 64, 2), FX(FS(6), 59, 2), FX(GS(6), 54, 2),
paulo@0:   FX(DS(6), 49, 2), FX(F(6), 44, 2), FX(GS(6), 39, 2),
paulo@0:   FX(DS(6), 34, 3), FX(FS(6), 29, 3), FX(GS(6), 24, 3),
paulo@0:   FX(DS(6), 20, 3), FX(F(6), 16, 3), FX(GS(6), 12, 3),
paulo@0:   FX(DS(6), 9, 3), FX(F(6), 6, 3), FX(GS(6), 3, 3)
paulo@0: };
paulo@0: 
paulo@0: static const u16 streakEffect[] = {
paulo@0:   0, 35,
paulo@0:   FX(C(6), 64, 2), FX(DS(6), 59, 2), FX(F(6), 54, 2),
paulo@0:   FX(C(6), 49, 2), FX(D(6), 44, 2), FX(F(6), 39, 2),
paulo@0:   FX(C(6), 34, 3), FX(DS(6), 29, 3), FX(F(6), 24, 3),
paulo@0:   FX(C(6), 20, 3),
paulo@0:   FX(DS(6), 64, 2), FX(FS(6), 59, 2), FX(GS(6), 54, 2),
paulo@0:   FX(DS(6), 49, 2), FX(F(6), 44, 2), FX(GS(6), 39, 2),
paulo@0:   FX(DS(6), 34, 3), FX(FS(6), 29, 3), FX(GS(6), 24, 3),
paulo@0:   FX(DS(6), 20, 3),
paulo@0:   FX(FS(6), 64, 2), FX(A(6), 59, 2), FX(B(6), 54, 2),
paulo@0:   FX(FS(6), 49, 2), FX(GS(6), 44, 2), FX(B(6), 39, 2),
paulo@0:   FX(FS(6), 34, 3), FX(A(6), 29, 3), FX(B(6), 24, 3),
paulo@0:   FX(FS(6), 20, 3), FX(GS(6), 16, 3), FX(B(6), 12, 3),
paulo@0:   FX(FS(6), 9, 3), FX(GS(6), 6, 3), FX(B(6), 3, 3)
paulo@0: };
paulo@0: 
paulo@0: static const u16 holdEffect[] = {
paulo@0:   1, 10,
paulo@0:   FX(E(5), 20, 0), FX(G(5), 25, 0),
paulo@0:   FX(B(5), 30, 0), FX(B(5), 30, 0),
paulo@0:   FX(G(5), 28, 0), FX(E(5), 24, 0),
paulo@0:   FX(D(5), 20, 0), FX(C(5), 15, 0),
paulo@0:   FX(C(5), 10, 0), FX(C(5), 5, 0)
paulo@0: };
paulo@0: 
paulo@0: 
paulo@0: static const u16 irsEffect[] = {
paulo@0:   0, 12,
paulo@0:   FX(CS(7), 40, 3), FX(CS(7), 40, 3),
paulo@0:   FX(FS(7), 40, 3), FX(FS(7), 40, 3),
paulo@0:   FX(B(7), 40, 3), FX(B(7), 35, 3),
paulo@0:   FX(B(7), 30, 3), FX(B(7), 25, 3),
paulo@0:   FX(B(7), 20, 3), FX(B(7), 15, 3),
paulo@0:   FX(B(7), 10, 3), FX(B(7), 5, 3),
paulo@0: };
paulo@0: 
paulo@0: static const u16 countEffect[] = {
paulo@0:   0, 14,
paulo@0:   FX(D(5), 64, 0), FX(D(5), 64, 0),
paulo@0:   FX(CS(5), 64, 0), FX(CS(5), 64, 0),
paulo@0:   FX(C(5), 64, 1), FX(C(5), 64, 1),
paulo@0:   FX(B(4), 64, 1), FX(AS(4), 64, 1),
paulo@0:   FX(A(4), 64, 2), FX(GS(4), 64, 2),
paulo@0:   FX(GS(4), 64, 3), FX(G(4), 48, 3),
paulo@0:   FX(G(4), 32, 3), FX(G(4), 16, 3),
paulo@0: };
paulo@0: 
paulo@0: static const u16 winEffect1[] = {
paulo@0:   0, 54,
paulo@0:   FX(C(6), 32, 2), FX(C(6), 48, 1), FX(C(6), 48, 1), FX(C(6), 48, 1),
paulo@0:   FX(C(6), 32, 2), 0, 0, 0, 0,
paulo@0:   FX(AS(5), 32, 2), FX(AS(5), 48, 1), FX(AS(5), 48, 1), FX(AS(5), 48, 1),
paulo@0:   FX(AS(5), 32, 2), 0, 0, 0, 0,
paulo@0:   FX(C(6), 32, 2), FX(C(6), 48, 1), FX(C(6), 48, 1), FX(C(6), 48, 1),
paulo@0:   FX(D(6), 32, 2), 0, 0, 0, 0,
paulo@0: 
paulo@0:   FX(D(6), 32, 2), FX(D(6), 48, 1), FX(D(6), 48, 1), FX(D(6), 48, 1),
paulo@0:   FX(D(6), 47, 1), FX(D(6), 46, 1), FX(D(6), 45, 1), FX(D(6), 44, 1),
paulo@0:   FX(D(6), 43, 1), FX(D(6), 42, 1), FX(D(6), 41, 1), FX(D(6), 40, 1),
paulo@0:   FX(D(6), 39, 1), FX(D(6), 38, 1), FX(D(6), 37, 1), FX(D(6), 36, 1),
paulo@0:   FX(D(6), 35, 1), FX(D(6), 34, 1), FX(D(6), 33, 1), FX(D(6), 32, 1),
paulo@0:   FX(D(6), 31, 1), FX(D(6), 30, 1), FX(D(6), 29, 1), FX(D(6), 28, 1),
paulo@0:   FX(D(6), 27, 1), FX(D(6), 26, 1), FX(D(6), 25, 1), FX(D(6), 24, 1),
paulo@0:   FX(D(6), 18, 2), FX(D(6), 12, 2), FX(D(6), 6, 2)
paulo@0: };
paulo@0: 
paulo@0: static const u16 winEffect2[] = {
paulo@0:   0, 54,
paulo@0:   FX(E(6), 32, 2), FX(E(6), 48, 1), FX(E(6), 48, 1), FX(E(6), 48, 1),
paulo@0:   FX(E(6), 32, 2), 0, 0, 0, 0,
paulo@0:   FX(D(6), 32, 2), FX(D(6), 48, 1), FX(D(6), 48, 1), FX(D(6), 48, 1),
paulo@0:   FX(D(6), 32, 2), 0, 0, 0, 0,
paulo@0:   FX(E(6), 32, 2), FX(E(6), 48, 1), FX(E(6), 48, 1), FX(E(6), 48, 1),
paulo@0:   FX(E(6), 32, 2), 0, 0, 0, 0,
paulo@0: 
paulo@0:   FX(FS(6), 32, 2), FX(FS(6), 48, 1), FX(FS(6), 48, 1), FX(FS(6), 48, 1),
paulo@0:   FX(FS(6), 47, 1), FX(FS(6), 46, 1), FX(FS(6), 45, 1), FX(FS(6), 44, 1),
paulo@0:   FX(FS(6), 43, 1), FX(FS(6), 42, 1), FX(FS(6), 41, 1), FX(FS(6), 40, 1),
paulo@0:   FX(FS(6), 39, 1), FX(FS(6), 38, 1), FX(FS(6), 37, 1), FX(FS(6), 36, 1),
paulo@0:   FX(FS(6), 35, 1), FX(FS(6), 34, 1), FX(FS(6), 33, 1), FX(FS(6), 32, 1),
paulo@0:   FX(FS(6), 31, 1), FX(FS(6), 30, 1), FX(FS(6), 29, 1), FX(FS(6), 28, 1),
paulo@0:   FX(FS(6), 27, 1), FX(FS(6), 26, 1), FX(FS(6), 25, 1), FX(FS(6), 24, 1),
paulo@0:   FX(FS(6), 18, 2), FX(FS(6), 12, 2), FX(FS(6), 6, 2)
paulo@0: };
paulo@0: 
paulo@0: static const u16 dieEffect1[] = {
paulo@0:   0, 60,
paulo@0:   FX(E(3), 60, 2), FX(E(3), 59, 2), FX(E(3), 58, 2), FX(E(3), 57, 2),
paulo@0:   FX(E(3), 56, 2), FX(E(3), 55, 2), FX(E(3), 54, 2), FX(E(3), 53, 2),
paulo@0:   FX(E(3), 52, 2), FX(E(3), 51, 2), FX(E(3), 50, 2), FX(E(3), 49, 2),
paulo@0:   FX(E(3), 48, 2), FX(E(3), 47, 2), FX(E(3), 46, 2), FX(E(3), 45, 2),
paulo@0:   FX(E(3), 44, 2), FX(E(3), 43, 2), FX(E(3), 42, 2), FX(E(3), 41, 2),
paulo@0:   FX(E(3), 40, 2), FX(E(3), 39, 2), FX(E(3), 38, 2), FX(E(3), 37, 2),
paulo@0:   FX(E(3), 36, 2), FX(E(3), 35, 2), FX(E(3), 34, 2), FX(E(3), 33, 2),
paulo@0:   FX(E(3), 32, 2), FX(E(3), 31, 2), FX(E(3), 30, 2), FX(E(3), 29, 2),
paulo@0:   FX(E(3), 28, 2), FX(E(3), 27, 2), FX(E(3), 26, 2), FX(E(3), 25, 2),
paulo@0:   FX(E(3), 24, 2), FX(E(3), 23, 2), FX(E(3), 22, 2), FX(E(3), 21, 2),
paulo@0:   FX(E(3), 20, 2), FX(E(3), 19, 2), FX(E(3), 18, 2), FX(E(3), 17, 2),
paulo@0:   FX(E(3), 16, 2), FX(E(3), 15, 2), FX(E(3), 14, 2), FX(E(3), 13, 2),
paulo@0:   FX(E(3), 12, 2), FX(E(3), 11, 2), FX(E(3), 10, 2), FX(E(3),  9, 2),
paulo@0:   FX(E(3),  8, 2), FX(E(3),  7, 2), FX(E(3),  6, 2), FX(E(3),  5, 2),
paulo@0:   FX(E(3),  4, 2), FX(E(3),  3, 2), FX(E(3),  2, 2), FX(E(3),  1, 2)
paulo@0: };
paulo@0: 
paulo@0: static const u16 dieEffect2[] = {
paulo@0:   1, 60,
paulo@0:   FX(E(4), 60, 2), FX(B(3), 59, 2), FX(E(3), 58, 2), FX(E(3), 57, 2),
paulo@0:   FX(E(3), 56, 2), FX(E(3), 55, 2), FX(E(3), 54, 2), FX(E(3), 53, 2),
paulo@0:   FX(E(3), 52, 2), FX(E(3), 51, 2), FX(E(3), 50, 2), FX(E(3), 49, 2),
paulo@0:   FX(E(3), 48, 2), FX(E(3), 47, 2), FX(E(3), 46, 2), FX(E(3), 45, 2),
paulo@0:   FX(E(3), 44, 2), FX(E(3), 43, 2), FX(E(3), 42, 2), FX(E(3), 41, 2),
paulo@0:   FX(E(3), 40, 2), FX(E(3), 39, 2), FX(E(3), 38, 2), FX(E(3), 37, 2),
paulo@0:   FX(E(3), 36, 2), FX(E(3), 35, 2), FX(E(3), 34, 2), FX(E(3), 33, 2),
paulo@0:   FX(E(3), 32, 2), FX(E(3), 31, 2), FX(E(3), 30, 2), FX(E(3), 29, 2),
paulo@0:   FX(E(3), 28, 2), FX(E(3), 27, 2), FX(E(3), 26, 2), FX(E(3), 25, 2),
paulo@0:   FX(E(3), 24, 2), FX(E(3), 23, 2), FX(E(3), 22, 2), FX(E(3), 21, 2),
paulo@0:   FX(E(3), 20, 2), FX(E(3), 19, 2), FX(E(3), 18, 2), FX(E(3), 17, 2),
paulo@0:   FX(E(3), 16, 2), FX(E(3), 15, 2), FX(E(3), 14, 2), FX(E(3), 13, 2),
paulo@0:   FX(E(3), 12, 2), FX(E(3), 11, 2), FX(E(3), 10, 2), FX(E(3),  9, 2),
paulo@0:   FX(E(3),  8, 2), FX(E(3),  7, 2), FX(E(3),  6, 2), FX(E(3),  5, 2),
paulo@0:   FX(E(3),  4, 2), FX(E(3),  3, 2), FX(E(3),  2, 2), FX(E(3),  1, 2)
paulo@0: };
paulo@0: 
paulo@0: static const u16 *effects[32] = {
paulo@0:   rotateEffect,
paulo@0:   moveEffect,
paulo@0:   NULL,  // drop: not used
paulo@0:   landEffect,
paulo@0:   lockEffect,
paulo@0:   lineEffect,
paulo@0:   homerEffect,
paulo@0:   streakEffect,
paulo@0:   NULL,  // spawn
paulo@0:   holdEffect,  // hold
paulo@0:   irsEffect,  // irs
paulo@0:   NULL,  // 4x4 square
paulo@0:   NULL, NULL, NULL, NULL,  // unused
paulo@0:   dieEffect1, dieEffect2
paulo@0: };
paulo@0: 
paulo@0: 
paulo@0: 
paulo@0: static const u16 *fxPtr[5];
paulo@0: static u8 fxLen[5];
paulo@0: static s8 lastCD;
paulo@0: 
paulo@0: 
paulo@0: 
paulo@0: static void startEffect(const u16 *s) {
paulo@0: 
paulo@0:   // skip effects that lack an actual effect
paulo@0:   if (!s) {
paulo@0:     return;
paulo@0:   }
paulo@0:   
paulo@0:   unsigned int type = s[0];
paulo@0:   unsigned int len = s[1];
paulo@0:   unsigned int min = 0;
paulo@0:   unsigned int max = 2;
paulo@0:   
paulo@0:   if (type > 0) {
paulo@0:     min = 3;
paulo@0:     max = 4;
paulo@0:   }
paulo@0: 
paulo@0:   // prepare to kill the channel with the shortest time remaining
paulo@0:   unsigned int shortestLen = fxLen[min];
paulo@0:   unsigned int shortestCh = min;
paulo@0:   for (int ch = min + 1; ch <= max; ++ch) {
paulo@0:     if (fxLen[ch] < shortestLen) {
paulo@0:       shortestLen = fxLen[ch];
paulo@0:       shortestCh = ch;
paulo@0:     }
paulo@0:   }
paulo@0:   
paulo@0:   // if the channel is suitable, kill it
paulo@0:   if (shortestLen < len) {
paulo@0:     fxPtr[shortestCh] = s + 2;
paulo@0:     fxLen[shortestCh] = len;
paulo@0:   }
paulo@0: }
paulo@0: 
paulo@0: static void pollEffects(void) {
paulo@0:   for (int ch = 0; ch < 5; ++ch) {
paulo@0:     unsigned int note = 36;
paulo@0:     unsigned int vol = 0;
paulo@0:     unsigned int duty = 0;
paulo@0:     if (fxLen[ch] > 0) {
paulo@0:       unsigned int data = *fxPtr[ch]++;
paulo@0:       duty = (data >> 14) & 0x03;
paulo@0:       vol = (data >> 7) & 0x7F;
paulo@0:       note = data & 0x7F;
paulo@0:       --fxLen[ch];
paulo@0:     }
paulo@0:     SCHANNEL_CR(11 + ch) = SCHANNEL_ENABLE | SOUND_FORMAT_PSG | SOUND_PAN(64)
paulo@0:                    | (duty << 24) | vol;
paulo@0:     SCHANNEL_TIMER(11 + ch) = midi2psgFreq[note];
paulo@0:   }
paulo@0: }
paulo@0: 
paulo@0: void ljSoundEffects(unsigned long int sounds,
paulo@0:                            int countdown) {
paulo@0: 
paulo@0:   // cancel out overlapping line clear sounds
paulo@0:   if (sounds & 0x0080) {
paulo@0:     sounds &= ~0x0060;
paulo@0:   } else if (sounds & 0x0040) {
paulo@0:     sounds &= ~0x0020;
paulo@0:   }
paulo@0:   
paulo@0:   for (int y = 0; sounds; ++y, sounds >>= 1) {
paulo@0:     if (sounds & 1) {
paulo@0:       startEffect(effects[y]);
paulo@0:     }
paulo@0:   }
paulo@0:   if (countdown < 0) {
paulo@0:     countdown = 0;
paulo@0:   } else if (countdown > 6) {
paulo@0:     countdown = 6;
paulo@0:   }
paulo@0:   if (countdown < lastCD) {
paulo@0:     if (countdown > 0) {
paulo@0:       startEffect(countEffect);
paulo@0:     } else {
paulo@0:       startEffect(winEffect1);
paulo@0:       startEffect(winEffect2);
paulo@0:     }
paulo@0:   }
paulo@0:   lastCD = countdown;
paulo@0:   pollEffects();
paulo@0: }