diff options
| -rw-r--r-- | apps/plugins/SOURCES | 6 | ||||
| -rw-r--r-- | apps/plugins/metronome.c | 2483 | ||||
| -rw-r--r-- | apps/plugins/viewers.config | 2 | ||||
| -rw-r--r-- | docs/CREDITS | 1 | ||||
| -rw-r--r-- | manual/plugins/metronome.tex | 175 |
5 files changed, 1907 insertions, 760 deletions
diff --git a/apps/plugins/SOURCES b/apps/plugins/SOURCES index fba1655..3865fbf 100644 --- a/apps/plugins/SOURCES +++ b/apps/plugins/SOURCES @@ -134,13 +134,7 @@ wavrecord.c #endif /* PLATFORM_NATIVE */ - - -#if CONFIG_CODEC == SWCODEC || !defined(SIMULATOR) /* Not for hwcodec sims */ metronome.c -#endif - - #ifdef HAVE_LCD_BITMAP /* Not for the Archos Player */ diff --git a/apps/plugins/metronome.c b/apps/plugins/metronome.c index c519608..e8014b7 100644 --- a/apps/plugins/metronome.c +++ b/apps/plugins/metronome.c @@ -7,7 +7,7 @@ * \/ \/ \/ \/ \/ * $Id$ * - * Copyright (C) 2004 Matthias Wientapper + * Copyright (C) 2004 Matthias Wientapper, 2014-2015 Thomas Orgis * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License @@ -17,600 +17,68 @@ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * + * TODO: + * - Think about generating the sounds on startup with SWCODEC. ****************************************************************************/ #include "plugin.h" #include "lib/pluginlib_actions.h" #include "lib/pluginlib_exit.h" - - - -#if CONFIG_CODEC != SWCODEC -/* tick sound from a metronome */ -static unsigned char sound[] = { -255,251, 80,196, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 73,110,102,111, 0, 0, 0, 15, 0, 0, 0, 4, 0, 0, 4, 19, 0, 64, 64, - 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, - 64, 64, 64,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128, -128,128,128,128,128,128,128,128,192,192,192,192,192,192,192,192,192,192,192,192, -192,192,192,192,192,192,192,192,192,192,192,192,192,255,255,255,255,255,255,255, -255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 0, 0, 0, - 58, 76, 65, 77, 69, 51, 46, 57, 50, 32, 1,137, 0, 0, 0, 0, 0, 0, 0, 0, - 2, 64, 36, 5,191, 65, 0, 0, 0, 0, 0, 4, 19,168,187,153, 93, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0,255,251, 80,196, 0, 0, 10, 81, 57, 65,184,120, -128, 1, 95,159,239,191,144, 96, 0, 0,128, 0, 0, 0, 0, 0, 0, 48, 24, 12, - 0, 0, 15,175,185,222, 39, 7,126, 46, 50,191,243,197,255,247, 62, 92,111,252, -115, 15, 27,140,153,159,247,242,124, 44, 92,164,177, 57,175,255,236, 79,164, 98, - 68,205, 69,160, 64, 15,251,127,128,168, 38, 92,138, 17, 67,196, 80,184,223,255, -255,161,117, 33, 55, 83,191,255,193,240, 33, 57,114, 17, 0, 2, 0, 0, 0, 10, -191, 10, 8,196,209, 75, 55,236,177,115,238,223,203, 61,176, 89, 78,101,219,118, -118, 65,154,126,187,239,241,127,247,245, 59, 18,219, 94,105,245,221,161,173, 91, -191, 27,255,247, 18,124, 71,117,139,133,170,221,227,251,135,110,236,255,183,219, -100, 78,184,125,212,131, 65, 95,212,245,145, 67, 77, 10,153,250,132,195, 4,138, -224, 0, 0, 0,158,107, 42, 65,227,185, 90,158, 86, 6,155, 77,255,251, 82,196, - 8, 0, 10,136,185,103, 4, 61, 48, 65,118,173, 44, 60,147, 10,152,107, 49, 74, - 18,208, 91, 23,178,196,220, 25, 64,233,230, 36,170, 0,210,219,131, 40,165, 22, - 86,195, 23,145, 33, 16,138, 99,109,117,245, 71,162, 69, 42,220,164, 91, 72,165, - 26, 69,146,150,199,222, 73,102,148, 29, 19, 5, 65, 86, 6,150,120,180, 26, 88, - 75, 18,191,255,250,171, 4, 8,132,140, 0, 0, 20,186,242,162, 66,100, 62, 86, -206, 86,255, 26,203,201,255,255,141,128,166,196,175,133, 9, 70,188,146,175,133, - 60, 17,217,229, 90, 27, 87, 93, 34, 76,113,185, 84,213, 56, 17,170, 83, 75,180, -203,116,101, 93, 90, 99, 35,174,230, 42,125, 12,128, 79, 93, 81,234, 67, 66,137, -105,157,157, 23, 71, 53, 40,250,204,105, 89,203,107,250, 63,174, 89,133, 81,140, - 0, 52, 17, 16, 0, 0, 18,111, 20, 92, 32,213, 48,179, 50, 26,244,179, 27,230, -154, 34,133,177, 88,255,251, 82,196, 13, 0, 10,125, 65, 85,244, 85, 0, 1,210, -172,231, 7, 31, 32, 0, 37, 11, 68, 69, 13, 37, 48,210, 23, 69, 36,122,143,148, -211,141, 44, 76,135, 72,148,195,135,174, 84,149,167, 30,198,183,255,213,111, 61, - 27,155,191,177,207,246,163,255,230, 30,137,219,255,182,186,185,239, 52,148,171, - 75, 63,167, 44, 0, 2, 81,190, 41,253,248,182,180, 23, 43,127,217,161, 41,191, - 36,199, 40,153,108, 66,224,131,192,217, 12, 67,217, 6,218,240,108,112, 63, 33, - 93, 12, 8, 43, 66, 42, 74, 12,215,135,100,172, 33, 65,172, 29, 98, 4, 83, 34, - 40, 17,111,133,255, 18,145, 60, 59,136,145, 92,106,144, 34,185, 58, 76,154,254, -146,144,115, 4, 84,180,142,178, 38, 79,253, 34,237,105, 31,106, 70, 73, 36,138, - 73,164,181,127,253,182, 82,217, 26,245,117,163,255,219, 50,115,223,245, 92,198, -165,173, 0, 15,249,132, 50, 19,157, 85,121,153,245, 51,255,251, 82,196, 6,131, - 74, 96,134,156, 92, 19, 0, 8, 0, 0, 52,128, 0, 0, 0, 60,226, 73, 57, 26, -249,253,122,211,128, 65, 86, 10, 1, 9,195,128, 36, 72,225,196,146,115, 73, 18, - 75, 65, 77, 9, 5,200, 43, 16,163,129, 77, 9, 5,200,110, 39,127,255,255,255, -255,255,255,255,252, 83, 66,142,140, 21,136, 46, 64,166,133, 28, 12, 21,136, 46, - 64,166,133, 21, 6, 76, 65, 77, 69, 51, 46, 57, 50, 85, 85, 85, 85, 85, 85, 85, - 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, - 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, - 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, - 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, - 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, - 85, 85, 85}; +#include "fixedpoint.h" + +/* About time resolution: + 1000 means 1 ms resolution. It should get better with higher values + in theory, but in practice, too small timer intervals increase the + chance of being missed and make the metronome lag behind. Mean tempo + still works out with very small divider values (29 even) as long as + the rounding error compensation is active, although beat intervals + become jerky. You compromise between long-term accuracy and steadyness + from one beat to the next. + + A drift you have to accept comes just from the audio clock itself, or even + from the difference between clocks in the device. The Sansa Clip+ has around + 0.04 % error in audio frequency using the "good" PLLB. I presume that the + difference between timing using PLLA and PLLB is at least that big. Something + up to 40 ms time difference over one minute when comparing to an external + reference or just the metronome plugin with playback of a prepared PCM track + is to be expected. + + Also, since playback on SWCODEC is not allowed to happen inside the timer + callback, there is a delay introduced by the main loop scheduling. This + could be compensated for by delaying the audio depending on a counter + incremented since the period elapsed in the callback, at the price of + putting the display out of sync. On a Clip+, the schedule delay isn't + biggest problem (drift for fine timer resolution is). + + All in all, 1 ms is too small, 2 ms seems to work fine ... + 4 ms might still be cool, too. +*/ +#if defined(SIMULATOR) +/* Simulator really wants 1024. Not 1000, not 512, only 1024. + Otherwise it is strangely slow. */ +static const unsigned int timerfreq_div = 1024; #else -static signed short sound[] = { - 1, -1, 1, -1, 0, 0, 0, 1, -1, 0, 0, - 0, -1, 2, -2, 2, -1, 0, 0, 0, 0, 1, - -1, 0, -1, 1, 0, 0, 0, 1, -1, 1, -2, - 1, -1, 1, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, -1, 2, -2, 2, -1, 0, 1, -1, 1, - -1, 0, 0, 0, 0, 1, -2, 2, -2, 1, 0, - 1, -1, 0, 1, -1, 0, 1, -2, 2, -1, 0, - 0, 0, -1, 1, 0, 0, 0, 0, 0, 0, 0, - 0, -1, 1, -1, 2, -2, 2, -2, 2, -2, 1, - 0, 0, 0, 1, -2, 2, -2, 1, 0, 0, 0, - 0, 0, 0, -1, 1, 0, -1, 2, -2, 2, -1, - 0, 0, 0, -1, 1, -1, 1, -1, 2, -2, 1, - 0, -1, 2, -2, 2, -2, 1, 0, 0, 0, 0, - 0, 0, 0, 0, 1, -1, 0, 0, -1, 1, 0, - 0, 1, -1, 0, 0, 0, 0, 0, 0, 0, 0, - 1, -2, 2, -1, 0, 0, 0, 0, 0, 1, -2, - 1, 0, 0, 0, 0, 0, 1, -1, 0, 0, -1, - 2, -2, 2, -2, 2, -1, 0, 0, -1, 1, -1, - 1, -1, 1, -1, 1, -1, 1, 0, 0, -1, 2, - -2, 1, 0, 0, 0, 0, 0, 1, -1, 0, 0, - -1, 1, 0, 0, 0, 0, 0, 0, 1, -2, 2, - -2, 2, -1, 1, -1, 1, -2, 2, -2, 2, -2, - 2, -2, 2, -2, 2, -1, 0, 0, 0, -1, 2, - -2, 2, -1, 1, -1, 1, -2, 2, -2, 1, 0, - 1, -1, 1, -2, 1, -1, 1, 0, 0, 0, 0, - 0, 0, 0, 0, -1, 1, 0, -1, 2, -1, 0, - 0, -1, 1, 0, -1, 2, -2, 1, 0, 0, 0, - 0, 0, 0, -1, 2, -1, 1, -1, 0, 0, 1, - -2, 2, -1, 1, -1, 0, 1, -1, 0, 0, 0, - 0, 0, 0, -1, 1, 0, 0, 0, 0, -1, 2, - -2, 2, -1, 0, 1, -1, 0, 0, 0, 0, 0, - 0, 0, 0, 1, -1, 1, -1, 0, 0, 0, 0, - 0, 1, -1, 1, -1, 0, 1, -2, 2, -1, 0, - 1, -2, 2, -2, 2, -2, 2, -1, 0, 1, -1, - 0, 1, -1, 0, 0, 0, 0, 0, 0, 1, -2, - 2, -2, 1, 0, -1, 2, -2, 1, 0, 0, 0, - 0, -1, 1, 0, 0, 1, -1, 0, 0, 0, 0, - 0, 0, 0, 1, -1, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 1, - -1, 1, 0, 0, 0, 0, 0, 0, -1, 2, -1, - 0, 0, 0, 0, 1, -1, 0, 0, 1, -2, 2, - -1, 0, 0, 0, 0, -1, 1, 0, 0, -1, 2, - -2, 1, 0, -1, 1, -1, 2, -2, 2, -2, 2, - -1, 0, 0, 0, 0, 0, 1, -1, 0, 0, 0, - 0, 0, 0, 0, 0, 0, -1, 1, 0, 1, -2, - 2, -1, 0, 1, -1, 0, 0, 0, 0, 0, 0, - -1, 2, -2, 2, -2, 2, -1, 0, 0, 0, -1, - 1, 0, -1, 1, 0, 0, 0, 0, 0, 0, 1, - -1, 0, 0, -1, 1, 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-1, - 0, 0, 1, -1, 1, -2, 2, -1, 1, -1, 1, - -1, 0, 1, -2, 2, -1, 1, -1, 0, 0, 0, - 0, 1, -1, 1, -1, 1, -2, 2, -1, 1, 0, - -1, 1, -1, 1, -1, 0, 0, 0, 0, 0, 0, - 1, -1, 1, -1, 1, -1, 0, 0, 0, 1, 0, - -1, 1, 0, -1, 1, -2, 2, -2, 2, -1, 0, - 0, 0, 1, -1, 1, -1, 1, -1, 1, -1, 1, - 0, 0, -1, 1, -1, 1, -1, 1, -1, 0, 0, - 0, 0, 1, -1, 1, 0, -1, 0, 0, 0, 1, - -1, 1, -1, 0, 1, -1, 0 -}; +static const unsigned int timerfreq_div = 500; /* 2 ms resolution */ #endif +/* actual (not quarter) beats per minute above which display blinking + is deactivated (since it is not needed anymore and because of performance + issues) */ +static const unsigned int blinklimit = 135; + +enum metronome_errors +{ + MERR_NOTHING = 0 +, MERR_MISSING +, MERR_OOM +, MERR_TEMPO +, MERR_METER +, MERR_VOLUME +, MERR_PATTERN +}; + +#define PART_MAX 10 /* maximum count of programmed parts */ #if (CONFIG_KEYPAD == IRIVER_H100_PAD) || (CONFIG_KEYPAD == IRIVER_H300_PAD) \ - || (CONFIG_KEYPAD == SANSA_E200_PAD) || (CONFIG_KEYPAD == SAMSUNG_YH820_PAD) \ + || (CONFIG_KEYPAD == SANSA_E200_PAD) || (CONFIG_KEYPAD == SAMSUNG_YH820_PAD) \ || (CONFIG_KEYPAD == SAMSUNG_YH920_PAD) #define MET_SYNC #endif @@ -636,20 +104,13 @@ static signed short sound[] = { #define METRONOME_PAUSE PLA_CANCEL #define METRONOME_PLAY PLA_SELECT_REPEAT -#if defined(MET_SYNC) -enum { - METRONOME_SYNC = LAST_PLUGINLIB_ACTION+1, -}; -#endif /* IRIVER_H100_PAD||IRIVER_H300_PAD */ - - -#define METRONOME_MSG_START "start: hold select" -#define METRONOME_MSG_STOP "stop : cancel" +#define METRONOME_START PLA_SELECT #ifdef MET_SYNC +enum{ METRONOME_SYNC = LAST_PLUGINLIB_ACTION+1 }; static const struct button_mapping iriver_syncaction[] = { - {METRONOME_SYNC, BUTTON_REC, BUTTON_NONE }, + { METRONOME_SYNC, BUTTON_REC, BUTTON_NONE }, LAST_ITEM_IN_LIST__NEXTLIST(CONTEXT_PLUGIN) }; #endif /* IRIVER_H100_PAD||IRIVER_H300_PAD */ @@ -663,24 +124,836 @@ const struct button_mapping *plugin_contexts[] = }; #define PLA_ARRAY_COUNT sizeof(plugin_contexts)/sizeof(plugin_contexts[0]) -static int bpm = 120; -static int period = 0; -static int minitick = 0; +#if CONFIG_CODEC != SWCODEC +#ifndef SIMULATOR +/* MP3 tick sounds */ +static unsigned char tick_sound[] = +{ + 255,251,112,196, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 +, 0, 73,110,102,111, 0, 0, 0, 15, 0, 0, 0, 3, 0, 0, 4,229, 0, 85, 85 +, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85 +, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85,170,170,170,170,170,170,170,170,170 +,170,170,170,170,170,170,170,170,170,170,170,170,170,170,170,170,170,170,170,170 +,170,170,170,170,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255 +,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 0, 0, 0 +, 57, 76, 65, 77, 69, 51, 46, 57, 57,114, 1,205, 0, 0, 0, 0, 46,102, 0, 0 +, 20, 96, 36, 3, 64, 66, 0, 0, 96, 0, 0, 4,229,101,175,184,232, 0, 0, 0 +, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 +, 0, 0, 0, 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52,180,138,174,207,255,235, 82,210, 64,123, 34,197,101, 47,255,254,234, 91 +, 14, 74, 68,234,219,255,254,206,131,143,162,120,234,210,191,255,245, 93, 18,200 +,225, 42, 29,171,255,254,165,164,196, 24,137, 32,223, 90, 93, 96, 64,217, 78, 35 +, 32, 53,185,107,237, 43,113, 98, 80,107,161, 3,206, 60,192, 10, 78,226,219,199 +,158,146,158, 47, 59, 90,253,154,221,198,138,147,100,150,206,233, 32, 39,192, 73 +, 23, 76,150,201, 41,209,186,217, 37,250,233, 38,198, 34, 24, 18, 33,130, 38,158 +, 73, 54, 69,146, 91, 36,182, 75,235, 64,216,196,138, 9,201, 69,174,138,157,244 +,154,150,208,246, 57, 72, 71, 2,148, 23, 76,115, 83,255,210,218,161, 56, 3, 68 +, 81, 49,190,139,253,125, 81,205, 25, 13,202,146,156,173,255,250,234,194, 8, 69 +, 13,142,255,255,209, 88,136, 73, 6,145,235, 26,142,191,255, 85,100,154,104,178 +,131,213, 0, 34, 0, 17,132, 0, 7,227, 82,135, 11,113, 70,110,105, 94,118, 22 +,255,251,112,196, 9, 0, 17, 61,249, 41,128,101,163, 73,217,178,153, 88,147, 21 +, 48,158,206,220,162,156,221, 7,209, 69, 20,117,163, 69,146, 68,145, 26,131,150 +, 0, 4,132, 41, 8,214,202,209, 69, 30,191,116, 76,156,240, 41,194,118, 23,147 +, 67,173, 87,255,233, 29, 64,216, 73,129, 10, 28,227,197,217, 43,255,254,203, 40 +,140, 48,129, 5,201, 21, 58, 95,255,232,180,168, 70,136,131,201,146,255,254,182 +,169,206, 5,216,101, 36,146,217,109,255,250,169, 38, 96, 35, 69, 51,167,157,191 +,255, 82,158,152,225, 46, 14, 99,235,100,159,255,253, 22, 29,162, 98, 84,108,210 +,202,128, 74, 16, 23,220, 23, 96,152, 17, 5,129,242, 49,137, 75, 60, 81, 16, 80 +, 34,106, 74, 91,255,222, 53, 18, 64,160, 70, 1,195, 5,139,230, 84,118,254,236 +, 44, 29, 1,130,196,195,130,236,237,255,253,156, 84, 60, 17, 10, 10, 19, 35,179 +,255,254,206,198, 14,132,130,194,196, 14, 67,179,255,254,198, 40,144,136, 80, 80 +, 76, 64,228, 57, 29,191,251, 57, 76, 34, 18, 8,132, 66,132,200,114, 59, 63,255 +,220,166, 17, 18, 18, 26, 32,112,201,159,240,144,184,169, 23,127,197,133, 69, 85 +, 76, 65, 77, 69, 51, 46, 57, 57, 46, 53, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85 +, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85 +, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85 +}; +static unsigned char tock_sound[] = +{ + 255,251,112,196, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 +, 0, 73,110,102,111, 0, 0, 0, 15, 0, 0, 0, 3, 0, 0, 4,229, 0, 85, 85 +, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85 +, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85,170,170,170,170,170,170,170,170,170 +,170,170,170,170,170,170,170,170,170,170,170,170,170,170,170,170,170,170,170,170 +,170,170,170,170,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255 +,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255, 0, 0, 0 +, 57, 76, 65, 77, 69, 51, 46, 57, 57,114, 1,205, 0, 0, 0, 0, 46,100, 0, 0 +, 20, 96, 36, 3, 64, 66, 0, 0, 96, 0, 0, 4,229,187,155,119, 17, 0, 0, 0 +, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 +, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 +, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 +, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 +, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 +, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 +, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,255,251,112,196, 0, 0, 13 +,105, 19,104,212,146,128, 10,164, 41,175,119, 51, 32, 0, 2, 32, 41, 84, 9,130 +, 96,152,109,228, 0, 16, 0, 6, 9,209,163,111,127,154, 48, 0, 0, 0, 0,129 +,194, 19,212,226, 97,240,248,187,255, 65, 0,248,124, 92,255,144,130, 1,192,225 +, 9,249,206,115,138, 16,158,132, 57,206,115,191,242, 16,132,111,212,231, 14, 7 +, 8, 70,243,156,231, 57,206,121,207,200, 66, 16, 92,231,255,134, 0, 0, 0,127 +,244, 60, 60, 51,255,192, 3,195,207,252, 0, 0, 0, 29, 39,244, 60, 48, 3,255 +,195,219,177,171,179,181, 8,157,251,239,155,104,162, 80, 5,194, 16,165,199, 42 +,104,133, 19,109, 88, 96, 61,104,242,117,118, 94,135, 29, 53, 72, 67, 85, 11, 54 +, 59, 64,154,155,128,195, 23,148, 98, 43,186, 43,139, 64,218, 82, 68,160,197,168 +,125, 10, 50, 41, 16,240, 30, 6,228, 52,117, 0, 51,130,146,122,152,109,162,201 +, 45,154, 30, 11, 66, 30, 76, 73,145,224, 52,149, 17, 55,138,112,105, 51, 36,147 +, 22,130, 89, 20,138, 36,114,212,145, 3,199,107,101,213, 25, 21,222,196,209,162 +, 40,168,168,165,162,100,142,163,220,186,250, 72,106, 54, 75, 48,243, 79,153, 54 +,163, 93,179,171,204,144,232,190,115, 19,208, 90,172,244, 40, 98,126, 35,161,234 +,122,143,221, 39,250,159, 61, 35,111,250,213,216, 6,252, 9,138, 17, 64, 1, 13 +, 56, 80, 58,104,184, 37,255,251,114,196, 7,128, 17,250, 1, 97,189,152, 0, 10 +, 44,192, 41,253,151,169,185,237, 56, 3,131,220, 24,180,204,165,221,129,107,210 +,192, 50,130, 26, 22, 26,180, 77, 81, 85,221,146, 33,197,224,198,197,228,146, 89 +,162,210, 69,100,233, 13, 25,145, 61, 19,206,151,232,172,212, 58,162,149, 53, 70 +,234,234, 81,176,186, 28, 39,145,253, 87, 33,130,150, 43, 36,187,245,169,141,200 +, 41,178,191,230, 68,233,170,255,230, 37,227,101,183,237, 49, 56,109,255,115,134 +,232,223,247,156, 62,191,250, 43, 42,169,127,245, 26,160,255,234,151,157,191,215 +, 46,164,223,235, 98,137,118,223,238,112,189,111,247, 56, 94,106, 16, 1, 77, 8 +, 25, 4,204, 0, 0,134, 96, 41,151,170, 74,147,135, 11,136, 28,220, 96,102,179 +, 16,145, 89,202, 11,197,114, 72, 0,241, 77, 88,211, 70,174,171, 10, 11, 84,163 +, 5, 53,191,241,191,106,245,209,114, 21,240,208, 75,172,190,150,103,205,178,252 +, 78, 36,166,139,132,106,231, 86,253,130, 80,178,201,254,193, 68, 20,207,254,206 +, 49, 19, 78,127,253,159,255, 33, 37, 37, 95,238,112,188, 89, 37, 79,238,165, 5 +,163,151,249,168,130,215,255,169,223,249,231, 15,149,191,161,227,209,235, 63,232 +,166, 10,198,183,232,150, 34,119,255,213, 17,255,231, 17, 44, 8, 2, 96, 1,101 +,184,243,226,216, 18, 60,216,132,105,150,250,101,165, 64,237,172,186, 35,114,126 +,255,251,112,196, 12,128,144,142, 3, 44,140,180,241, 1,207, 47,217, 72,244, 10 +, 48, 29, 88, 20, 21,128, 36,231,157,173,100,202, 35,136,119,133,228,209, 55,186 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85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85 +, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85 +}; +#endif /* SIMULATOR */ +#else +/* raw PCM */ +static signed short tick_sound[] = +{ + 32767,32764,32767,32767,32763,32767,32762,32767,32765,32767,32767 +,32766,32767,32766,32767,32767,32765,32767,32764,32767,32764,32767 +,32763,-32764,-32768,-32766,-32768,-32768,-32767,-32767,-32767,-32765,-32768 +,-32764,-32768,-32768,-32766,-32768,-32764,-32768,-32766,-32767,-32768,-32767 +,-32766,32763,32767,32763,32767,32767,32766,32767,32766,32767,32765 +,32767,32763,32767,32766,32767,32766,32767,32763,32767,32765,32767 +,32767,-32768,-32765,-32768,-32767,-32765,-32767,-32765,-32768,-32764,-32768 +,-32766,-32768,-32768,-32766,-32767,-32768,-32764,-32768,-32764,-32768,-32768 +,-32766,32716,32668,32620,32564,32520,32467,32418,32370,32316,32272 +,32214,32176,32114,32074,32020,31972,31922,31873,31823,31775,31726 +,31676,-31627,-31579,-31530,-31479,-31433,-31383,-31333,-31287,-31236,-31188 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+,-17,-8,-17,-10,-14,-10,-11,-13,-10,-12,-9 +,-10,-11,-9,-11,-8,-9,-10,-6,-13,-4,-12 +,-4,-12,-2,-14,-1,-12,-3,-8,-6,-7,-6 +,-6,-5,-6,-5,-6,6,3,8,2,7,2 +,7,2,6,1,6,4,1,9,-5,12,-5 +,10,-1,5,0,5,1,5,0,3,3,1 +,3,2,1,3,0,5,-2,4,0,2,3 +,-1,4,-3,6,-3,2,-2,-2,0,-1,-2 +,1,-1,-2,1,-2,0,0,-2,2,-3,2 +,-4,4,-5,5,-5,2,0,-1,0,1,-4 +,5,-5,4,-3,2,-1,-1,1,-2,2,-2 +,2,-2,2,-1,0,1,-1,0,1,-2,3 +,-3,2,-1,0,1,-1,0,0,1,-1,1 +,-2,3 +}; +#endif + +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + Utilities from pdbox plugin (Copyright (C) 2009 Wincent Balin) --- am I + supposed to supply these functions with the plugin? Should I use a library? +* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + +/* Implementation of strtod() and atof(), + taken from SanOS (http://www.jbox.dk/sanos/). */ +static int rb_errno = 0; + +static double rb_strtod(const char *str, char **endptr) +{ + double number; + int exponent; + int negative; + char *p = (char *) str; + double p10; + int n; + int num_digits; + int num_decimals; + + /* Reset Rockbox errno -- W.B. */ +#ifdef ROCKBOX + rb_errno = 0; +#endif + + // Skip leading whitespace + while (isspace(*p)) p++; + + // Handle optional sign + negative = 0; + switch (*p) + { + case '-': negative = 1; // Fall through to increment position + case '+': p++; + } + + number = 0.; + exponent = 0; + num_digits = 0; + num_decimals = 0; + + // Process string of digits + while (isdigit(*p)) + { + number = number * 10. + (*p - '0'); + p++; + num_digits++; + } + + // Process decimal part + if (*p == '.') + { + p++; + + while (isdigit(*p)) + { + number = number * 10. + (*p - '0'); + p++; + num_digits++; + num_decimals++; + } + + exponent -= num_decimals; + } + + if (num_digits == 0) + { +#ifdef ROCKBOX + rb_errno = 1; +#else + errno = ERANGE; +#endif + return 0.0; + } + + // Correct for sign + if (negative) number = -number; + + // Process an exponent string + if (*p == 'e' || *p == 'E') + { + // Handle optional sign + negative = 0; + switch(*++p) + { + case '-': negative = 1; // Fall through to increment pos + case '+': p++; + } + + // Process string of digits + n = 0; + while (isdigit(*p)) + { + n = n * 10 + (*p - '0'); + p++; + } + + if (negative) + exponent -= n; + else + exponent += n; + } + +#ifndef ROCKBOX + if (exponent < DBL_MIN_EXP || exponent > DBL_MAX_EXP) + { + errno = ERANGE; + return HUGE_VAL; + } +#endif + + // Scale the result + p10 = 10.; + n = exponent; + if (n < 0) n = -n; + while (n) + { + if (n & 1) + { + if (exponent < 0) + number /= p10; + else + number *= p10; + } + n >>= 1; + p10 *= p10; + } + +#ifndef ROCKBOX + if (number == HUGE_VAL) errno = ERANGE; +#endif + if (endptr) *endptr = p; + + return number; +} + +static double rb_atof(const char *str) +{ + return rb_strtod(str, NULL); +} + +/* * * * * * * * * * * * * * * * * * * * * * * + Actual metronome stuff +* * * * * * * * * * * * * * * * * * * * * * */ + +static int fd = -1; /* file descriptor, global for cleanup(). */ + +/* Round fixed-point number to integer. */ +static int fp_rint(long fp_num) +{ + fp_num += fp_num > 0 ? +((long)1<<15) : -((long)1<<15); + return (int)(fp_num / ((long)1<<16)); +} +/* float to fixed-point */ +static long fp_frac(float fl_num) +{ + return (long)(fl_num*((long)1<<16)); +} + +/* simple dynamic memory management + - only allocate blocks serially + - deallocation of most recent blocks by resetting the free region pointer + - everything aligned to 4 bytes (wasting some bytes, but playing safe) +*/ +static void *mem_begin = NULL; /* beginning of managed region. */ +static void *mem_end = NULL; /* just after end of managed region */ +static void *mem_free_region = NULL; /* pointer to unused free space */ +static void *mem_checkpointer = NULL; /* position to reset to */ + +/* Initialize memory management. */ +static void mem_init(void) +{ + size_t bufsize; + /* Can I trust that pointer to be aligned? Better be safe. */ + mem_begin = ALIGN_UP(rb->plugin_get_buffer(&bufsize), 4); + mem_end = mem_begin + bufsize - 3; + mem_free_region = mem_begin; + mem_checkpointer = mem_begin; +} + +/* Remember and reset free region, for temporary mem usage. */ +static void mem_checkpoint(void){ mem_checkpointer = mem_free_region; } +static void mem_reset (void){ mem_free_region = mem_checkpointer; } +static void *mem_allocate(size_t bytes) +{ + void *handout = mem_free_region; + /* Always handing out multiples of alignment size. */ + if(bytes % 4) bytes += 4 - bytes % 4; + if(mem_free_region + bytes >= mem_end) + { + rb->splash(2*HZ, "Out Of Memory"); + return NULL; + } + mem_free_region += bytes; + return handout; +} + +struct part; +struct part /* One part of a track, with one tempo (range), meter, etc. */ +{ + struct part *prev, *next; /* linked list links*/ + unsigned int id; /* index (in order, please) */ + char *label; + unsigned int bars; /* Duration of part in bars. */ + unsigned int beats_per_bar; /* 3 in 3/4 */ + unsigned int base_beat; /* 4 in 3/4 to adjust bpm value */ + unsigned int bpm; /* base tempo (1/4 notes per minute) */ + unsigned int bpm2; /* end tempo */ + unsigned int *beat_bpm; /* either NULL or (bars*beats_per_bar) values */ + long accel; /* fixed-point acceleration in 1/min (really) */ + int volume; /* volume offset in integer dB */ + /* Store pattern characters verbatim for max. 64 beats (no string + termination). One could save storage here by encoding things in bits, + or by allocating dynamically to begin with. */ + char *pattern; +}; + +static struct part *part_list = NULL; /* linked list of parts */ +static struct part *part = NULL; /* current part */ +static unsigned int parts = 0; /* total number of parts */ +static unsigned int bad_parts = 0; /* Count parts with parsing errors. */ + +/* Initialize a part that is not yet placed into the list. */ +static void part_init(struct part *ps) +{ + ps->prev = NULL; + ps->next = NULL; + ps->id = 0; + ps->label = NULL; + ps->bars = 0; + ps->beats_per_bar = 4; + ps->base_beat = 4; + ps->bpm = 120; + ps->bpm2 = 120; + ps->beat_bpm = NULL; + ps->accel = 0; + ps->volume = 0; + ps->pattern = NULL; +} + +/* Add to the list. */ +static void part_add(struct part *ps) +{ + if(part) + { + part->next = ps; + ps->prev = part; + part = ps; + } + else part = part_list = ps; + + ps->id = parts++; +} + +/* Stay away from zero. */ +static unsigned int positive(long long value) +{ + return value > 0 ? value : 1; +} + +/* Yay! Global state variables! */ +static bool track_mode = false; /* switch for programmed tracks metronome */ +static int loop = 0; /* Needed? */ +static unsigned int beat = 0; +static unsigned int bar = 0; /* How big shall this become? */ +/* The currently (approximate) active bpm value, set from calc_period(). */ +static unsigned int bpm = 1; + +/* Should be unsigned? */ +static unsigned int period = 0; /* beat interval in timer ticks */ +static long period_diff = 0; /* fixed-point error of last period computation */ +static unsigned int minitick = 0; /* elapsed ticks */ +static bool beating = false; /* A beat is/was playing and count needs to increase. */ +static int display_state = 0; /* Current display state code. */ +static bool display_trigger = false; /* Draw display on next occasion */ static bool sound_active = false; static bool sound_paused = true; -static char buffer[30]; +/* global static buffer for messages in any situation */ +static char buffer[64]; +/* For line parsing, more is needed, allocated on demand. + As my memory management doesn't allow to free it, keeping it local + ist not smart. */ +static char* linebuf = NULL; +size_t linebuf_size = 0; + +/* global state for tempo tapping */ static bool reset_tap = false; static int tap_count = 0; static int tap_time = 0; static int tap_timeout = 0; -int bpm_step_counter = 0; +static int bpm_step_counter = 0; + +static bool sound_trigger = false; #if CONFIG_CODEC != SWCODEC +#ifdef SIMULATOR + +/* No audio in HWCODEC simulator build. */ +#define MET_IS_PLAYING 0 +#define MET_PLAY_STOP do {} while(0) +static void play_tick(void){ printf("tick\n"); } +static void play_tock(void){ printf("tock\n"); } + +#else + #define MET_IS_PLAYING rb->mp3_is_playing() #define MET_PLAY_STOP rb->mp3_play_stop() @@ -692,98 +965,390 @@ static void callback(const void** start, size_t* size) rb->led(0); } +/* Wondering: Should one prevent playing again while sound_active == true? */ + +static void play_tick(void) +{ + sound_active = true; + rb->led(1); + rb->mp3_play_data(tick_sound, sizeof(tick_sound), callback); + rb->mp3_play_pause(true); /* kickoff audio */ +} + static void play_tock(void) { sound_active = true; rb->led(1); - rb->mp3_play_data(sound, sizeof(sound), callback); - rb->mp3_play_pause(true); /* kickoff audio */ + rb->mp3_play_data(tock_sound, sizeof(tock_sound), callback); + rb->mp3_play_pause(true); /* kickoff audio */ } +#endif /* SIMULATOR */ + #else /* CONFIG_CODEC == SWCODEC */ #define MET_IS_PLAYING rb->pcm_is_playing() #define MET_PLAY_STOP rb->audio_stop() +/* Really necessary? Cannot just play mono? + Also: This is wasted memory! */ +static short tick_buf[sizeof(tick_sound)*2]; +static short tock_buf[sizeof(tock_sound)*2]; -bool need_to_play = false; - -short sndbuf[sizeof(sound)*2]; - -/* Convert the mono "tock" sample to interleaved stereo */ -static void prepare_tock(void) +/* Convert the mono samples to interleaved stereo */ +static void prepare_buffers(void) { - int i; - for(i = 0;i < (int)sizeof(sound)/2;i++) { - sndbuf[i*2] = sound[i]; - sndbuf[i*2+1] = sound[i]; - } + size_t i; + for(i = 0;i < sizeof(tick_sound)/sizeof(short);i++) + tick_buf[i*2] = tick_buf[i*2+1] = tick_sound[i]; + for(i = 0;i < sizeof(tock_sound)/sizeof(short);i++) + tock_buf[i*2] = tock_buf[i*2+1] = tock_sound[i]; } -static void play_tock(void) +static void play_tick(void) { - rb->pcm_play_data(NULL, NULL, sndbuf, sizeof(sndbuf)); + rb->pcm_play_data(NULL, NULL, tick_buf, sizeof(tick_buf)); } -#endif /* CONFIG_CODEC != SWCODEC */ - -static void calc_period(void) +static void play_tock(void) { - period = 61440/bpm-1; /* (60*1024)/bpm; */ + rb->pcm_play_data(NULL, NULL, tock_buf, sizeof(tock_buf)); } +#endif /* CONFIG_CODEC != SWCODEC */ -static void metronome_draw(struct screen* display) +/* State: 0: blank/title, 1: tick, 2: tock 3: silent klick */ +/* TODO: Could use more smart placement, using + lcd_getstringsize() and such. */ +static void metronome_draw(struct screen* display, int state) { + struct part *ps; +#ifndef HAVE_LCD_BITMAP + char beat1 = ' '; + char beat2 = ' '; +#else + int textlen = display->lcdwidth / display->getcharwidth(); +#endif + ps = part; display->clear_display(); - -#ifdef HAVE_LCD_BITMAP +#ifdef HAVE_LCD_BITMAP display->setfont(FONT_SYSFIXED); - display->puts(0, 0, "Metronome"); - if(display->screen_type==SCREEN_MAIN) +#endif + switch(state) { - display->puts(0, 5, "Select to TAP"); - display->puts(0, 6, "Rec to SYNC"); +#ifdef HAVE_LCD_BITMAP + case 0: + if(sound_paused) + { + if(track_mode) display->puts(0, 0, "Metronome Track"); + else display->puts(0, 0, "Metronome"); + + display->hline(0, display->lcdwidth, 12); + } + break; + /* Draw odd/even ticks/tocks differently to be able to go without + display clearing in between for fast beats. */ + case 1: + if((beat+1) % 2 == 0) + display->fillrect( display->lcdwidth/2, 0 + , display->lcdwidth, 12 ); + else + display->fillrect( 0, 0 + , display->lcdwidth/2-1, 12 ); + break; + case 2: + if((beat+1) % 2 == 0) + display->fillrect( display->lcdwidth/2, display->lcdheight-13 + , display->lcdwidth, 12 ); + else + display->fillrect( 0, display->lcdheight-13 + , display->lcdwidth/2-1, 12 ); + break; + case 3: + display->puts((textlen-3)/2,0, "o.O"); + break; +#else /* Much simpler on 2-line text display, but same thing. */ + case 1: + if((beat+1) % 2 == 0) + beat1 = '/'; + else + beat1 = '\\'; + break; + case 2: + if((beat+1) % 2 == 0) + beat2 = '/'; + else + beat2 = '\\'; + break; + case 3: + beat1 = '.'; + break; +#endif } -#ifdef HAVE_REMOTE_LCD - else + + if(track_mode) { - display->puts(0, 5, "Rec to TAP"); - display->puts(0, 6, "Mode to SYNC"); + +#ifdef HAVE_LCD_BITMAP + /* One line in several. */ + rb->snprintf( buffer, sizeof(buffer), "%u/%u@%u V%d" + , ps->beats_per_bar, ps->base_beat + , bpm, rb->global_settings->volume ); + display->puts(0,4, buffer); +#else + /* Just two short lines with integrated beat indicator. */ + rb->snprintf( buffer, sizeof(buffer), "%c %u/%u@%u" + , beat1 + , ps->beats_per_bar, ps->base_beat + , bpm ); + display->puts(0,0, buffer); + /* Simulator prints format %+02d ... real Rockbox doesn't. */ + rb->snprintf( buffer, sizeof(buffer), "%c V%d" + , beat2 + , rb->global_settings->volume ); + display->puts(0,1, buffer); +#endif /* HAVE_LCD_BITMAP */ + +#ifdef HAVE_LCD_BITMAP + /* Would it hurt to draw a 3rd line to 2-line display? + I guess there are 3-line displays out there. */ + if(ps->label && rb->strlen(ps->label)) + { + rb->snprintf(buffer, sizeof(buffer), "\"%s\"", ps->label); + display->puts((textlen-rb->strlen(buffer))/2, 2, buffer); + } + + /* Wildly guessing here with puts(). */ + if(ps->bars) + rb->snprintf( buffer, sizeof(buffer), "P%u/%u: B%u/%u+%u" + , part->id+1, parts, bar+1, ps->bars, beat+1 ); + else + rb->snprintf( buffer, sizeof(buffer), "P%u/%u: B%u/_+%u" + , part->id+1, parts, bar+1, beat+1 ); + display->puts(0, 5, buffer); +#endif /* HAVE_LCD_BITMAP */ + } + else /* track mode */ + { + +#ifdef HAVE_LCD_BITMAP + if(display->screen_type==SCREEN_MAIN) + { +#ifdef MET_SYNC + display->puts(0, 5, "Select=TAP Rec=SYNC"); +#else + display->puts(0, 5, "Select=TAP"); +#endif + } +#ifdef HAVE_REMOTE_LCD + else + { +#ifdef MET_SYNC + display->puts(0, 5, "Rec=TAP Mode=SYNC"); +#else + display->puts(0, 5, "Rec=TAP"); +#endif + } #endif #endif /* HAVE_LCD_BITMAP */ - rb->snprintf(buffer, sizeof(buffer), "BPM: %d ",bpm); #ifdef HAVE_LCD_BITMAP - display->puts(0,3, buffer); + rb->snprintf( buffer, sizeof(buffer), "BPM: %d Vol: %d" + , bpm, rb->global_settings->volume ); + display->puts(0,3, buffer); #else - display->puts(0,0, buffer); + rb->snprintf( buffer, sizeof(buffer), "%c BPM: %d " + , beat1, bpm ); + display->puts(0,0, buffer); + rb->snprintf( buffer, sizeof(buffer), "%c Vol: %d" + , beat2, rb->global_settings->volume ); + display->puts(0,1, buffer); #endif /* HAVE_LCD_BITMAP */ - rb->snprintf(buffer, sizeof(buffer), "Vol: %d", - rb->global_settings->volume); #ifdef HAVE_LCD_BITMAP - display->puts(10, 3, buffer); -#else - display->puts(0,1, buffer); + display->hline(0, 111, 12); + if(sound_paused) display->puts(0,2,"start: hold select"); + else display->puts(0,2,"stop : cancel"); #endif /* HAVE_LCD_BITMAP */ + } /* !track_mode */ + #ifdef HAVE_LCD_BITMAP - display->hline(0, 111, 12); - if(sound_paused) - display->puts(0,2,METRONOME_MSG_START); - else - display->puts(0,2,METRONOME_MSG_STOP); display->setfont(FONT_UI); #endif /* HAVE_LCD_BITMAP */ display->update(); } +/* Trigger drawing of display at the next occasion using given state. */ +static void trigger_display(int state) +{ + display_state = state; + display_trigger = true; +} + +/* Actually draw display. */ static void draw_display(void) { FOR_NB_SCREENS(i) - metronome_draw(rb->screens[i]); + metronome_draw(rb->screens[i], display_state); +} + +/* Modify actual volume by given offset without changing the configured one. + This is for parts with associated volume. */ +static void tweak_volume(int offset) +{ + int vol = rb->global_settings->volume + offset; + int minvol = rb->sound_min(SOUND_VOLUME); + int maxvol = rb->sound_max(SOUND_VOLUME); + + if (vol > maxvol) vol = maxvol; + else if(vol < minvol) vol = minvol; + + rb->sound_set(SOUND_VOLUME, vol); +} + +/* tempo at a certain point in beat space in an accelerated part */ +static long accel_tempo(struct part *ps, long offset) +{ + long fp_bpm = (long)ps->bpm<<16; + long fp_bpm2 = (long)ps->bpm2<<16; + long v = fp_bpm + fp_mul(ps->accel, offset, 16); + /* Offset could be negative, actually, so ensure tempo stays within both + bounds */ + if(ps->accel > 0) + { + if(v < fp_bpm) v = fp_bpm; + if(v > fp_bpm2) v = fp_bpm2; + } + else /* deceleration */ + { + if(v > fp_bpm) v = fp_bpm; + if(v < fp_bpm2) v = fp_bpm2; + } + return v; +} + +/* Calculate number of ticks to wait till next beat. */ +static void calc_period(void) +{ + struct part *ps = part; + long deltat; + long beatlen; /* in quarter notes */ + long period_fp; + + beatlen = fp_div(4<<16, ps->base_beat<<16, 16); + /* Hack: Put the factor 60 in before computing deltat, to preserve + some accuracty. */ + if(ps->beat_bpm) + { + bpm = ps->beat_bpm[bar*ps->beats_per_bar+beat]; + deltat = fp_div(fp_mul(60<<16,beatlen,16), bpm<<16, 16); + } else + if(ps->accel == 0.f) + { /* Fixed tempo. */ + bpm = ps->bpm; + /* Minutes per base beat, from quarters per minute. */ + deltat = fp_div(fp_mul(60<<16,beatlen,16), bpm<<16, 16); + } + else + { /* Acceleration, varying period with each beat. */ + long v0, v1; + long offset = (bar*ps->beats_per_bar + beat) << 16; + /* Always computed from start of part for seeking and accuracy. */ + v0 = accel_tempo(ps, fp_mul(beatlen, offset, 16)); + offset += 1<<16; + v1 = accel_tempo(ps, fp_mul(beatlen, offset, 16)); + /* Playing safe with too small tempo changes, avoiding the acceleration + math that might divide by very small deltat. */ + if(labs(v1-v0) > 1<<8) + { + /* deltat = 1.f / ps->accel * rb_log(v1/v0) */ + deltat = fp_mul( fp_div(60<<16, ps->accel, 16) + , fp16_log(fp_div(v1, v0, 16)) + , 16 ); + bpm = fp_rint(fp_div(fp_mul(60<<16, beatlen, 16), deltat, 16)); + } + else + { /* Arbitrarily choosing v1. */ + bpm = fp_rint(v1); + deltat = fp_div(fp_mul(60<<16,beatlen,16), v1, 16); + } + } + /* The treatment of the rounding error when converting to integer + period using period_diff helps a lot to keep track lengths close to + "correct" even with timerfreq_div as low as 77. Actually, I have _less_ + drift than with timerfreq_div of 1000! */ + period_fp = fp_mul(timerfreq_div<<16, deltat, 16) + period_diff; + period = positive(fp_rint( period_fp )); + period_diff = period_fp - (long)(period<<16); +} + +/* Last beat finished, to prepare for the next one. */ +static void advance_beat(void) +{ + if(++beat == part->beats_per_bar) + { + beat = 0; + /* Bar counter always incremented for acceleration, but only checked + against a limit if there is one. */ + ++bar; + if(part->bars && bar == part->bars) + { + bar = 0; + if(part->next) part = part->next; + else + { + part = part_list; + if(!loop) sound_paused = true; + } + tweak_volume(part->volume); + } + } + /* Always recompute period, as acceleration changes it for each beat. */ + calc_period(); +} + +/* Decide what to play, update display, play it. + Beat counting happens here, too. */ +static void play_ticktock(void) +{ + if(beating) advance_beat(); + + /* Hack: Clear trigger to avoid race condition. */ + display_trigger = 0; + if(sound_paused) + { + beating = false; + display_state = 0; + draw_display(); + } + else + { + char pat = 'x'; + if(part->pattern) pat = part->pattern[beat]; + + beating = true; + /* Blinking and specific sound for tick, tock and silent beat. + Drawing display first for slow machines (YH820), to avoid + interrupting audio for regular playback. */ + switch(pat) + { + case 'X': + display_state = 1; + draw_display(); + play_tick(); + break; + case 'x': + display_state = 2; + draw_display(); + play_tock(); + break; + default: + display_state = 3; + draw_display(); + } + } } /* helper function to change the volume by a certain amount, +/- @@ -792,112 +1357,448 @@ static void change_volume(int delta) { int minvol = rb->sound_min(SOUND_VOLUME); int maxvol = rb->sound_max(SOUND_VOLUME); - int vol = rb->global_settings->volume + delta; + int vol = rb->global_settings->volume + delta; - if (vol > maxvol) vol = maxvol; - else if (vol < minvol) vol = minvol; - if (vol != rb->global_settings->volume) { - rb->sound_set(SOUND_VOLUME, vol); + if (vol > maxvol) vol = maxvol; + else if(vol < minvol) vol = minvol; + if(vol != rb->global_settings->volume) + { rb->global_settings->volume = vol; - draw_display(); + tweak_volume(part->volume); + trigger_display(display_state); } } /*function to accelerate bpm change*/ static void change_bpm(int direction) { - if((bpm_step_counter < 20) - || (bpm > 389) - || (bpm < 10)) + if( (bpm_step_counter < 20) + || (bpm > 389) + || (bpm < 10) ) bpm = bpm + direction; - else if (bpm_step_counter < 60) + else if(bpm_step_counter < 60) bpm = bpm + direction * 2; else - bpm = bpm + direction * 9; + bpm = bpm + direction * 9; + + if(bpm > 400) bpm = 400; + if(bpm < 1) bpm = 1; - if (bpm > 400) bpm = 400; - if (bpm < 1) bpm = 1; + part->bpm = bpm; calc_period(); - draw_display(); + trigger_display(display_state); bpm_step_counter++; } +/* I presume the timer ensures that not more than one instance + of the callback is running at a given time. */ static void timer_callback(void) { - if(minitick >= period){ + ++minitick; + + /* Clear blinker if tempo is slow enough. */ + if( (bpm*part->base_beat)/4 <= blinklimit && + !sound_paused && minitick == period/2 ) + trigger_display(0); + + if(minitick >= period) + { minitick = 0; - if(!sound_active && !sound_paused && !tap_count) { -#if CONFIG_CODEC == SWCODEC - /* On SWCODEC we can't call play_tock() directly from an ISR. */ - need_to_play = true; -#else - play_tock(); -#endif + if(!sound_active && !sound_paused && !tap_count) + { + sound_trigger = true; rb->reset_poweroff_timer(); } } - else { - minitick++; - } - if (tap_count) { + if(tap_count) + { tap_time++; - if (tap_count > 1 && tap_time > tap_timeout) + if(tap_count > 1 && tap_time > tap_timeout) tap_count = 0; } } -static void cleanup(void) +/* Stopping playback means incrementing the beat. Normally, it would be + incremented after the passing of the current note duration, naturally + while starting the next one. */ +static void metronome_pause(void) { + if(beating) + { + /* Finish the current beat. */ + advance_beat(); + beating = false; + } + sound_paused = true; + trigger_display(0); rb->timer_unregister(); +} + +static void metronome_unpause(void) +{ + sound_paused = false; + minitick = period; /* Start playing immediately (or after a millisecond). */ + /* Conserve power: Only start timer when actually playing. */ + rb->timer_register( 1, NULL, TIMER_FREQ/timerfreq_div + , timer_callback IF_COP(, CPU) ); +} + +static void cleanup(void) +{ + if(fd >= 0) rb->close(fd); + + metronome_pause(); MET_PLAY_STOP; /* stop audio ISR */ + tweak_volume(0); rb->led(0); #if CONFIG_CODEC == SWCODEC rb->pcm_set_frequency(HW_SAMPR_DEFAULT); #endif } -static void tap(void) +/* + Parse part definitions from tempomap file (see header for format). + Not bothering with encoding issues here. +*/ + +/* parse meter spec into part structure if given token matches */ +static bool parse_meter(char *token, struct part *ps) { - if (tap_count == 0 || tap_time < tap_count) { - tap_time = 0; - } - else { - if (tap_time > 0) { - bpm = 61440/(tap_time/tap_count); + char *toktok; + /* Careful not to misinterpret accelerated tempo specification: + 120-150/4 -> tempo + 3/4 -> meter */ + if( !rb->strchr(token, '-') && (toktok = rb->strchr(token, '/')) ) + { + /* Number before and after the '/'. */ + int num[2]; + num[0] = rb->atoi(token); + num[1] = rb->atoi(++toktok); + /* Only accept positive numbers. */ + if(num[0] > 0 && num[1] > 0) + { + ps->beats_per_bar = (unsigned int) num[0]; + ps->base_beat = (unsigned int) num[1]; + return true; + } + } + return false; +} + +/* Parse tempo, successful when getting a positive integer out of the token. */ +static bool parse_tempo(char *token, struct part *ps) +{ + char *toktok; + /* tempo[-tempo2/accel] ... first number always main tempo */ + int num = rb->atoi(token); + /* Only positive numbers. This avoids the pattern string and general + strangeness, unless -150 should mean "from previous tempo to 150". */ + if(num < 1) return false; + + ps->bpm = (unsigned int) num; + ps->bpm2 = ps->bpm; + ps->accel = 0; + /* This parser is not fool-proof. It parses valid data, but could + do funny things if you provide tempo/tempo2-accel, for example. + My credo is that the application doesn't crash, but if you give rubbish, + you'll get rubbish. */ + if( (toktok = rb->strchr(token, '-')) ) + { + char *subtok = toktok+1; + float faccel = 0.; + ps->bpm2 = positive(rb->atoi(subtok)); + /* Parse or compute accel in bpm/bar. */ + if( (toktok = rb->strchr(subtok, '/')) ) + { /* bars/bpm */ + float c = rb_atof(++toktok); + if( (c > 0.f ? c : -c) > 0.0001f) + faccel = 1./c; + } + else if( (toktok = rb->strchr(subtok, '*')) ) + { /* bpm/bar */ + faccel = rb_atof(++toktok); + } + else if(ps->bars > 0) + { /* Compute from tempo difference and bar count. */ + faccel = ((float)ps->bpm2 - (float)ps->bpm)/ps->bars; + } + /* Correct sign for all cases, starting with positive value. */ + if(faccel < 0) faccel = -faccel; + /* Negative only when end tempo is smaller. */ + if(ps->bpm2 < ps->bpm) faccel = -faccel; + /* Convert (quarterbeats-per-minute per bar) -> 1/min, which could be + seen as beats-per-minute/beat */ + faccel *= 1.f / (4.f/ps->base_beat * ps->beats_per_bar); /* 1/min */ + ps->accel = fp_frac(faccel); + } else + /* The other fancy variant: One tempo per beat. */ + if( (toktok = rb->strchr(token, ',')) ) + { + size_t i; + char *subtok = token; + /* It is a bug when the parser called this before. Alloc once. */ + if( ps->beat_bpm || !(ps->beat_bpm = + mem_allocate(sizeof(unsigned int)*ps->beats_per_bar*ps->bars)) ) + return false; + for(i=0; i<ps->beats_per_bar*ps->bars; ++i) + { + int num; + if(!subtok) return false; + if(subtok != token) ++subtok; + + num = rb->atoi(subtok); + if(num < 1) return false; - if (bpm > 400) - bpm = 400; + ps->beat_bpm[i] = (unsigned int) num; + subtok = rb->strchr(subtok, ','); } + } + return true; +} - calc_period(); - draw_display(); +/* The metronome pattern. + Ensure that the correct meter is present before calling this! */ +static bool parse_pattern(char *token, struct part *ps) +{ + size_t pi; + size_t pats = rb->strlen(token); + + /* First check if the pattern is valid, error out if not. */ + if(pats != ps->beats_per_bar) + return false; + for(pi=0; pi<pats; ++pi) + switch(token[pi]) + { + case 'X': + case 'x': + case '.': + break; + default: return false; + } + + if(!(ps->pattern || (ps->pattern = mem_allocate(pats)))) + return false; + /* Now store it. */ + memcpy(ps->pattern, token, pats); + return true; +} + +static bool parse_volume(char *token, struct part *ps) +{ + float factor = rb_atof(token); + ps->volume = fp_rint(fp_decibels(fp_frac(factor > 0.f ? factor : 0.f), 16)); + return true; +} + +/* Check condition, set error code and bail out if violated. */ +#define CHECK(a, c) if(!(a)){ errcode = c; goto parse_part_revert; } + +static void parse_part(char *line, unsigned int num) +{ + char *saveptr; + char *toktok; + char *token[5]; + struct part *ps; + size_t tokens = 0; + unsigned int errcode = MERR_NOTHING; + + while (isspace(*line)) line++; + /* Skip comments and empty lines quickly. */ + if(line[0] == '#' || line[0] == 0) return; + + mem_checkpoint(); + CHECK(ps = mem_allocate(sizeof(struct part)), MERR_OOM); + part_init(ps); + + /* Check for and store label. */ + if( (toktok = rb->strchr(line, ':')) ) + { + size_t len = toktok-line; + CHECK(ps->label = mem_allocate(len+1), MERR_OOM); + rb->memcpy(ps->label, line, len); + ps->label[len] = 0; + line = toktok+1; + } + + CHECK(token[0] = rb->strtok_r(line, " \t", &saveptr), MERR_MISSING); + tokens = 1; + /* After the optional label, there can be up to 5 tokens of interest. + Collect them in advance to make the parser code more sane. */ + while( tokens < 5 + && (token[tokens] = rb->strtok_r(NULL, " \t", &saveptr)) ) + { + if(token[tokens][0] == '#') + break; + ++tokens; + } + + CHECK(tokens >= 2, MERR_MISSING); + /* Now try to be smart about guessing which token can be what value. + Remember: Always parse meter before pattern or tempo! */ + ps->bars = (unsigned int) rb->atoi(token[0]); + if(tokens == 2) /* <bars> <tempo> */ + { + CHECK(parse_tempo(token[1], ps), MERR_TEMPO); + } else + if(tokens == 3) + { + /* <bars> <meter> <tempo> */ + if(parse_meter(token[1], ps)) + { + CHECK(parse_tempo(token[2], ps), MERR_TEMPO); + } else + /* <bars> <tempo> <pattern> */ + if(parse_pattern(token[2], ps)) + { + CHECK(parse_tempo(token[1], ps), MERR_TEMPO); + } else + /* <bars> <tempo> <volume> */ + { + CHECK(parse_tempo(token[1], ps), MERR_TEMPO); + CHECK(parse_volume(token[2], ps), MERR_VOLUME); + } + } else + if(tokens == 4) + { + /* <bars> <meter> <tempo> <pattern> */ + if(parse_meter(token[1], ps) && parse_pattern(token[3], ps)) + { + CHECK(parse_tempo(token[2], ps), MERR_TEMPO); + } else + /* <bars> <tempo> <pattern> <volume> */ + if(parse_pattern(token[2], ps)) + { + CHECK(parse_tempo(token[1], ps), MERR_TEMPO); + CHECK(parse_volume(token[3], ps), MERR_VOLUME); + } else + /* <bars> <meter> <tempo> <volume> */ + { + CHECK(parse_meter(token[1], ps), MERR_METER); + CHECK(parse_tempo(token[2], ps), MERR_TEMPO); + CHECK(parse_volume(token[3], ps), MERR_VOLUME); + } + } else + if(tokens == 5) /* the complete set */ + { + /* <bars> <meter> <tempo> <pattern> <volume> */ + CHECK(parse_meter(token[1], ps), MERR_METER); + CHECK(parse_tempo(token[2], ps), MERR_TEMPO); + CHECK(parse_pattern(token[3], ps), MERR_PATTERN); + CHECK(parse_volume(token[4], ps), MERR_VOLUME); + } + + if(!ps->pattern) + { + /* For parsed parts default to emphasize every first beat. */ + CHECK(ps->pattern = mem_allocate(ps->beats_per_bar), MERR_OOM); + memset(ps->pattern, 'x', ps->beats_per_bar); + ps->pattern[0] = 'X'; + } + + part_add(ps); + return; /* all good */ + + /* Remove part after some error. */ +parse_part_revert: + rb->snprintf(buffer, sizeof(buffer), "ERR %u @line %u", errcode, num); + rb->splash(2*HZ, buffer); + ++bad_parts; + mem_reset(); +} + +#undef CHECK + +static void step_back(void) +{ + beating = false; + beat = 0; + if(bar) + { + /* Endless parts only know position 0 to step to. */ + if(part->bars) --bar; + else bar = 0; + } + else if(part->prev) + { + part = part->prev; + /* This will jump to bar 0 for endless parts. */ + bar = positive(part->bars)-1; + tweak_volume(part->volume); + } + /* Always calculate period for acceleration. */ + calc_period(); + minitick = period; +} + +static void step_forw(void) +{ + beating = false; + /* Stepping forward in endless part always goes to the next one, if any. */ + if(part->bars == 0 || bar+1 == part->bars) + { + if(part->next) + { /* Advanced one part. */ + part = part->next; + bar = 0; + beat = 0; + tweak_volume(part->volume); + } + } + else ++bar; + /* Always calculate period for acceleration. */ + calc_period(); + minitick = period; +} + +static void tap(void) +{ + struct part *ps = part; + + /* Each tap resets the position. */ + beat = 0; + bar = 0; + + if(tap_count == 0 || tap_time < tap_count) + tap_time = 0; + else + { + if(tap_time > 0) + { + /* Could use fixed point math and rounding, even. */ + ps->bpm = 60*timerfreq_div*tap_count/tap_time; + + if(ps->bpm > 400) ps->bpm = 400; + } tap_timeout = (tap_count+2)*tap_time/tap_count; } tap_count++; minitick = 0; /* sync tock to tapping */ - play_tock(); - reset_tap = false; + play_ticktock(); } -enum plugin_status plugin_start(const void* parameter) +enum plugin_status plugin_start(const void* file) { int button; static int last_button = BUTTON_NONE; + bool common_action; - (void)parameter; atexit(cleanup); - if (MET_IS_PLAYING) - MET_PLAY_STOP; /* stop audio IS */ + mem_init(); -#if CONFIG_CODEC != SWCODEC - rb->bitswap(sound, sizeof(sound)); + if(MET_IS_PLAYING) MET_PLAY_STOP; /* stop audio IS */ + +#if (CONFIG_CODEC != SWCODEC) +#ifndef SIMULATOR + rb->bitswap(tick_sound, sizeof(tick_sound)); + rb->bitswap(tock_sound, sizeof(tock_sound)); +#endif #else - prepare_tock(); + prepare_buffers(); #if INPUT_SRC_CAPS != 0 /* Select playback */ rb->audio_set_input_source(AUDIO_SRC_PLAYBACK, SRCF_PLAYBACK); @@ -906,92 +1807,168 @@ enum plugin_status plugin_start(const void* parameter) rb->pcm_set_frequency(SAMPR_44); #endif /* CONFIG_CODEC != SWCODEC */ - calc_period(); - rb->timer_register(1, NULL, TIMER_FREQ/1024, timer_callback IF_COP(, CPU)); + if(file) + { + parts = 0; + bad_parts = 0; + fd = rb->open(file, O_RDONLY); + if(fd >= 0) + { + unsigned int linenum = 0; + /* Crazyness, allocating line buffer depending on free memory. */ + linebuf_size = mem_end - mem_free_region > 32*1024 + ? 1024 + : ( mem_end - mem_free_region > 16*1024 + ? 256 + : 128 ); + if(!(linebuf = mem_allocate(linebuf_size))) return PLUGIN_ERROR; + /* I'm assuming that read_line always terminates. */ + while(rb->read_line(fd, linebuf, linebuf_size) > 0) + { + parse_part(linebuf, ++linenum); + } + } + rb->close(fd); + if(bad_parts) + { + rb->snprintf(buffer, sizeof(buffer), "%u bad parts", bad_parts); + rb->splash(2*HZ, buffer); + } + if(!parts) + { + rb->splash(2*HZ, "Got no parts. Bye!"); + return PLUGIN_OK; + } + } + /* If no parts given, start in simple metronome mode. */ + if(!parts) + { /* Just checking the early bailout here. */ + struct part *ps = mem_allocate(sizeof(struct part)); + if(!ps) return PLUGIN_ERROR; + part_init(ps); + part_add(ps); + track_mode = false; + } + else track_mode = true; + + part = part_list; + tweak_volume(part->volume); + calc_period(); draw_display(); /* main loop */ - while (true){ + while(true) + { reset_tap = true; -#if CONFIG_CODEC == SWCODEC - button = pluginlib_getaction(TIMEOUT_NOBLOCK,plugin_contexts,PLA_ARRAY_COUNT); - if (need_to_play) + button = pluginlib_getaction( TIMEOUT_NOBLOCK, plugin_contexts + , PLA_ARRAY_COUNT ); + if(sound_trigger) { - need_to_play = false; - play_tock(); + sound_trigger = false; + play_ticktock(); /* Draws display before playback. */ + } + + common_action = false; + if(track_mode) + { + switch(button) + { + case METRONOME_START: + if(sound_paused) metronome_unpause(); + else metronome_pause(); + break; + case METRONOME_PAUSE: + if(!sound_paused) metronome_pause(); + break; + case METRONOME_LEFT: + case METRONOME_LEFT_REP: + step_back(); + trigger_display(0); + break; + case METRONOME_RIGHT: + case METRONOME_RIGHT_REP: + step_forw(); + trigger_display(0); + break; + default: + common_action = true; + } + } + else + { + switch(button) + { + case METRONOME_PAUSE: + if(!sound_paused) metronome_pause(); + break; + case METRONOME_PLAY: + if(sound_paused) metronome_unpause(); + break; + case METRONOME_TAP: + if(last_button != METRONOME_PLAY) + { + if(sound_paused) metronome_unpause(); + tap(); + } + break; + case METRONOME_LEFT: + bpm_step_counter = 0; + case METRONOME_LEFT_REP: + change_bpm(-1); + break; + case METRONOME_RIGHT: + bpm_step_counter = 0; + case METRONOME_RIGHT_REP: + change_bpm(1); + break; +#ifdef MET_SYNC + case METRONOME_SYNC: + minitick = period; + break; +#endif + default: + common_action = true; + } } -#else - button = pluginlib_getaction(TIMEOUT_BLOCK, - plugin_contexts,PLA_ARRAY_COUNT); -#endif /* SWCODEC */ - switch (button) { + if(common_action) + switch(button) + { case METRONOME_QUIT: /* get out of here */ return PLUGIN_OK; - - case METRONOME_PAUSE: - if(!sound_paused) - { - sound_paused = true; - draw_display(); - } - break; - case METRONOME_PLAY: - if(sound_paused) - { - sound_paused = false; - calc_period(); - draw_display(); - } - break; - case METRONOME_TAP: - if (last_button != METRONOME_PLAY) - tap(); - break; case METRONOME_VOL_UP: case METRONOME_VOL_UP_REP: change_volume(1); - calc_period(); + trigger_display(0); break; - case METRONOME_VOL_DOWN: case METRONOME_VOL_DOWN_REP: change_volume(-1); - calc_period(); + trigger_display(0); break; - - case METRONOME_LEFT: - bpm_step_counter = 0; - case METRONOME_LEFT_REP: - change_bpm(-1); - break; - - case METRONOME_RIGHT: - bpm_step_counter = 0; - case METRONOME_RIGHT_REP: - change_bpm(1); - break; - -#ifdef MET_SYNC - case METRONOME_SYNC: - minitick = period; - break; -#endif - default: exit_on_usb(button); reset_tap = false; break; - } - if (button) + + if(button) last_button = button; - if (reset_tap) { + if(reset_tap) tap_count = 0; + /* If there was some action, display drawing is still needed. + This _might_ disturb audio on slow machines, but + then, you could just stop pressing buttons, then;-) */ + if(display_trigger) + { + display_trigger = false; + draw_display(); } + + /* This determines the accuracy of the metronome with SWCODEC ... the + scheduler decides when we are allowed to play. */ rb->yield(); } } - diff --git a/apps/plugins/viewers.config b/apps/plugins/viewers.config index 24c888b..9eca2da 100644 --- a/apps/plugins/viewers.config +++ b/apps/plugins/viewers.config @@ -63,6 +63,8 @@ sok,games/sokoban,1 pgn,games/chessbox,1 sgf,games/goban,1 ss,games/sudoku,1 +tempo,apps/metronome,1 +tempo,apps/text_editor,2 wav,viewers/wavplay,9 wav,viewers/wavview,10 wav,viewers/wav2wv,- diff --git a/docs/CREDITS b/docs/CREDITS index 8d33a65..17f1d56 100644 --- a/docs/CREDITS +++ b/docs/CREDITS @@ -644,6 +644,7 @@ Jonathan Bettencourt Ilia Sergachev Nial Shui Mihail Zenkov +Thomas Orgis The libmad team The wavpack team diff --git a/manual/plugins/metronome.tex b/manual/plugins/metronome.tex index e792498..760507e 100644 --- a/manual/plugins/metronome.tex +++ b/manual/plugins/metronome.tex @@ -1,6 +1,23 @@ \subsection{Metronome} + This plugin can be used as a metronome to keep time during music -practice. Adjust the tempo through the interface or by tapping it out +practice. It supports two modes of operation, depending on it being +started from the plugin menu or as viewer for tempomap (\verb:.tempo:) +files. + +The sound is a piercing square wave that can be heard well also +through loud music from a band. +In addition, the display also indicates the beats while playing +so that you can discreetly place the device +in your sight for checking the tempo instead of wearing +headphones at a concert. + +\subsubsection{Simple Interactive Mode} + +This is the mode of operation that is active when starting the +plugin directly from the menu. It offers a uniform metronome sound at +a constant tempo. +You can adjust the tempo through the interface or by tapping it out on the appropriate button. \begin{btnmap} @@ -34,3 +51,159 @@ on the appropriate button. \opt{HAVEREMOTEKEYMAP}{& } & Sync tap \\} \end{btnmap} + + +\subsubsection{Programmed Track Mode} + +When starting the plugin as a viewer for tempomap files +(ending in \verb:.tempo:), it starts in the track mode that offers +playback of a preprogrammed metronome track consisting out of +multiple parts, each with possibly different properties. + +In contrast to the simple mode, there exists the notion of +meter and bars, along with emphasis on certain beats. +Parts can have these properties: + +\begin{itemize} + \item finite or infinite duration in bars (navigation only jumps + to the beginning of infinite parts), + \item differing meters (4/4, 3/4, 6/8, etc., default 4/4), + \item differing tempo (always in quarter beats per minute, + default 120) with + \begin{itemize} + \item one tempo per bar or even one tempo per beat, or + \item smooth tempo changes with configurable acceleration, and + \end{itemize} + \item custom beat patterns (tick/tock/silence on each beat), + default being emphasis (tick) on first beat, normal sound + (tock) on others. +\end{itemize} + +\paragraph{The button mapping} +is different to enable navigation in the programmed track. +\begin{btnmap} + \PluginExit + \opt{HAVEREMOTEKEYMAP}{& } + & Exit plugin \\ + + \PluginCancel + \opt{HAVEREMOTEKEYMAP}{& \PluginRCCancel} + & Stop (stay at position) \\ + + \PluginSelect + \opt{HAVEREMOTEKEYMAP}{& \PluginRCSelect} + & Start from / Stop at current position \\ + + \PluginLeft{} / \PluginRight + \opt{HAVEREMOTEKEYMAP}{& \PluginRCLeft{} / \PluginRCRight} + & Seek in track \\ + + \opt{scrollwheel}{\PluginScrollFwd{} / \PluginScrollBack} + \nopt{scrollwheel}{\PluginUp{} / \PluginDown} + \opt{HAVEREMOTEKEYMAP}{& \PluginRCUp{} / \PluginRCDown} + & Adjust volume \\ + + \opt{IRIVER_H100_PAD,IRIVER_H300_PAD,SANSA_E200_PAD}{ + \ButtonRec + \opt{HAVEREMOTEKEYMAP}{& } + & Sync tap \\} +\end{btnmap} + +\paragraph{Navigation} +The display indicates the part properties and position in track as such: +\begin{verbatim} + Metronome Track + --------------- + "Interlude" + 3/4@120 V-25 + P2/13: B1/5+2 +\end{verbatim} +In this example, the part label is ``Interlude'', the meter is 3/4 and +the tempo 120 quarter beats per minute (bpm). The volume setting is at -25 +and this is the second part of a track with 13 total. In that part, +the position is at the second beat of the first bar of five. + +\paragraph{The syntax of programmed tracks} +in tempomap files follows the format defined by +\url{http://das.nasophon.de/klick/}. +Actually, the goal is to keep compatibility between klick and this +Rockbox metronome. +The parts of a track are specified one line each in this scheme +(pieces in [] optional): +\begin{verbatim} +[name:] bars [meter ]tempo[-tempo2[*accel|/accel] [pattern] [volume] +\end{verbatim} +The bar count and tempo always have to be specified, the rest is optional. + +One example is +\begin{verbatim} +part I: 12 3/4 133 +\end{verbatim} +for a part named ``part I'' , 12 bars long, in 3/4 meter with +a tempo of 133 quarter beats per minute. +Tempo changes are indicated by specifying a tempo range and the +acceleration in one of these ways: +\begin{verbatim} +0 4/4 90-150*0.25 +0 4/4 150-90/4 +16 4/4 100-200 +\end{verbatim} +The first one goes from 90 to 150 bpm in an endless part with 0.25 bpm +increase per bar. The second one goes down from 150 to 90 with +4 bars per bpm change, which is the same acceleration as in the first line. +The last one is a part of 16 bars length that changes tempo from 100 to 200 +smoothly during its whole lifetime (6.25 bpm/bar). For details on how the +acceleration works, see +\url{http://thomas.orgis.org/science/metronome-tempomath/tempomath.html}. + +It is also possible to provide a tempo for each individual beat in a part +by separating values with a comma (no spaces), +\begin{verbatim} +varibeat: 3 4/4 135,90,78,100,120,120,99,100,43,94,120,133 +\end{verbatim} +where the beat duration is first according to 135 bpm, then 90 bpm, +and so forth. You are required to provide a value for each beat +in all bars of the part. + +You can provide a pattern that controls how the beats are played: +\begin{center} +\begin{tabular}{c|l} + Symbol & Meaning \\ + \hline + X & emphasized beat (Tick) \\ + x & normal beat (Tock) \\ + . & silent beat +\end{tabular} +\end{center} + +Some examples: +\begin{verbatim} +default: 0 4/4 120 Xxxx +rockon2: 0 4/4 120 xXxX + solea: 0 12/4 180 xxXxxXxXxXxX +shuffle: 0 12/12 120 x.xX.xx.xX.. + funky: 0 16/16 120 x.x.X..X.Xx.X..X +\end{verbatim} +The 12/12 for the shuffle create 1/4 triplets. Just do a bit of math;-) +This is still a metronome, not a drum machine, but it can act like a basic +one, helping you to figure out a certain rhythm within the meter. + +The UI is developed so that it fits into the display of a Sansa Clip+ and +that is the hardware device it is tested on. It seems to work reasonably +on some other models in the simulator. + +At last, a more complete tempomap file: +\begin{verbatim} +# An example track exercising the programmable Rockbox metronome +# or also http://das.nasophon.de/klick/. + lead-in: 1 4/4 120 XXXX 0.5 # 4 emphasized but less loud ticks + intro: 4 4/4 120 # standard beat +tearing down: 4 120-90 # changing tempo from 120 to 90 + break: 2 1/4 90 # 2 1/4 bars at 90 + rolling: 2 6/8 90 # 2 6/8 at same tempo (quarters!) + rumbling: 4 3/4 90 X.x # 3/4, first (tick) and last (tock) + ramp-up: 8 2/4 90-150 # speeding up to 150 bpm again + flow: 4 150 # steady 4/4 at 150 bpm + death: 8 150-60 # going down to 60 + final: 1 1/1 60 # one last hit +\end{verbatim} |