Advertising
- Something
- Tuesday, April 7th, 2009 at 3:58:33pm MDT
- diff --git a/apps/plugin.c b/apps/plugin.c
- index 17e9ac6..68d7c43 100644
- --- a/apps/plugin.c
- +++ b/apps/plugin.c
- @@ -427,6 +427,7 @@ static const struct plugin_api rockbox_api = {
- pcm_play_pause,
- pcm_get_bytes_waiting,
- pcm_calculate_peaks,
- + pcm_get_peak_buffer,
- pcm_play_lock,
- pcm_play_unlock,
- #ifdef HAVE_RECORDING
- diff --git a/apps/plugin.h b/apps/plugin.h
- index fdcf3c2..52d513c 100644
- --- a/apps/plugin.h
- +++ b/apps/plugin.h
- @@ -549,6 +549,7 @@ struct plugin_api {
- void (*pcm_play_pause)(bool play);
- size_t (*pcm_get_bytes_waiting)(void);
- void (*pcm_calculate_peaks)(int *left, int *right);
- + const void* (*pcm_get_peak_buffer)(int *count);
- void (*pcm_play_lock)(void);
- void (*pcm_play_unlock)(void);
- #ifdef HAVE_RECORDING
- diff --git a/apps/plugins/CATEGORIES b/apps/plugins/CATEGORIES
- index d6753ac..8e69099 100644
- --- a/apps/plugins/CATEGORIES
- +++ b/apps/plugins/CATEGORIES
- @@ -20,6 +20,7 @@ dict,apps
- disktidy,apps
- doom,games
- euroconverter,apps
- +fft,demos
- fire,demos
- fireworks,demos
- firmware_flash,apps
- diff --git a/apps/plugins/SUBDIRS b/apps/plugins/SUBDIRS
- index af5e1d0..6317683 100644
- --- a/apps/plugins/SUBDIRS
- +++ b/apps/plugins/SUBDIRS
- @@ -16,6 +16,9 @@ rockboy
- /* For all targets with a bitmap display */
- #ifdef HAVE_LCD_BITMAP
- +#if CONFIG_CODEC == SWCODEC
- +fft
- +#endif
- chessbox
- jpeg
- sudoku
- diff --git a/apps/plugins/fft/SOURCES b/apps/plugins/fft/SOURCES
- new file mode 100644
- index 0000000..bc5660d
- --- /dev/null
- +++ b/apps/plugins/fft/SOURCES
- @@ -0,0 +1,3 @@
- +kiss_fft.c
- +fft.c
- +math.c
- diff --git a/apps/plugins/fft/_kiss_fft_guts.h b/apps/plugins/fft/_kiss_fft_guts.h
- new file mode 100644
- index 0000000..0bd5138
- --- /dev/null
- +++ b/apps/plugins/fft/_kiss_fft_guts.h
- @@ -0,0 +1,145 @@
- +/*
- +Copyright (c) 2003-2004, Mark Borgerding
- +
- +All rights reserved.
- +
- +Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
- +
- + * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
- + * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
- + * Neither the author nor the names of any contributors may be used to endorse or promote products derived from this software without specific prior written permission.
- +
- +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- +*/
- +
- +/* kiss_fft.h
- + defines kiss_fft_scalar as either short or a float type
- + and defines
- + typedef struct { kiss_fft_scalar r; kiss_fft_scalar i; }kiss_fft_cpx; */
- +#include "kiss_fft.h"
- +#include "math.h"
- +#include <limits.h>
- +
- +#define MAXFACTORS 32
- +/* e.g. an fft of length 128 has 4 factors
- + as far as kissfft is concerned
- + 4*4*4*2
- + */
- +
- +struct kiss_fft_state{
- + int nfft;
- + int inverse;
- + int factors[2*MAXFACTORS];
- + kiss_fft_cpx twiddles[1];
- +};
- +
- +/*
- + Explanation of macros dealing with complex math:
- +
- + C_MUL(m,a,b) : m = a*b
- + C_FIXDIV( c , div ) : if a fixed point impl., c /= div. noop otherwise
- + C_SUB( res, a,b) : res = a - b
- + C_SUBFROM( res , a) : res -= a
- + C_ADDTO( res , a) : res += a
- + * */
- +#ifdef FIXED_POINT
- +#if (FIXED_POINT==32)
- +# define FRACBITS 31
- +# define SAMPPROD int64_t
- +#define SAMP_MAX 2147483647
- +#else
- +# define FRACBITS 15
- +# define SAMPPROD int32_t
- +#define SAMP_MAX 32767
- +#endif
- +
- +#define SAMP_MIN -SAMP_MAX
- +
- +#if defined(CHECK_OVERFLOW)
- +# define CHECK_OVERFLOW_OP(a,op,b) \
- + if ( (SAMPPROD)(a) op (SAMPPROD)(b) > SAMP_MAX || (SAMPPROD)(a) op (SAMPPROD)(b) < SAMP_MIN ) { \
- + fprintf(stderr,"WARNING:overflow @ " __FILE__ "(%d): (%d " #op" %d) = %ld\n",__LINE__,(a),(b),(SAMPPROD)(a) op (SAMPPROD)(b) ); }
- +#endif
- +
- +
- +# define smul(a,b) ( (SAMPPROD)(a)*(b) )
- +# define sround( x ) (kiss_fft_scalar)( ( (x) + (1<<(FRACBITS-1)) ) >> FRACBITS )
- +
- +# define S_MUL(a,b) sround( smul(a,b) )
- +
- +# define C_MUL(m,a,b) \
- + do{ (m).r = sround( smul((a).r,(b).r) - smul((a).i,(b).i) ); \
- + (m).i = sround( smul((a).r,(b).i) + smul((a).i,(b).r) ); }while(0)
- +
- +# define DIVSCALAR(x,k) \
- + (x) = sround( smul( x, SAMP_MAX/k ) )
- +
- +# define C_FIXDIV(c,div) \
- + do { DIVSCALAR( (c).r , div); \
- + DIVSCALAR( (c).i , div); }while (0)
- +
- +# define C_MULBYSCALAR( c, s ) \
- + do{ (c).r = sround( smul( (c).r , s ) ) ;\
- + (c).i = sround( smul( (c).i , s ) ) ; }while(0)
- +
- +#else /* not FIXED_POINT*/
- +
- +# define S_MUL(a,b) ( (a)*(b) )
- +#define C_MUL(m,a,b) \
- + do{ (m).r = (a).r*(b).r - (a).i*(b).i;\
- + (m).i = (a).r*(b).i + (a).i*(b).r; }while(0)
- +# define C_FIXDIV(c,div) /* NOOP */
- +# define C_MULBYSCALAR( c, s ) \
- + do{ (c).r *= (s);\
- + (c).i *= (s); }while(0)
- +#endif
- +
- +#ifndef CHECK_OVERFLOW_OP
- +# define CHECK_OVERFLOW_OP(a,op,b) /* noop */
- +#endif
- +
- +#define C_ADD( res, a,b)\
- + do { \
- + CHECK_OVERFLOW_OP((a).r,+,(b).r)\
- + CHECK_OVERFLOW_OP((a).i,+,(b).i)\
- + (res).r=(a).r+(b).r; (res).i=(a).i+(b).i; \
- + }while(0)
- +#define C_SUB( res, a,b)\
- + do { \
- + CHECK_OVERFLOW_OP((a).r,-,(b).r)\
- + CHECK_OVERFLOW_OP((a).i,-,(b).i)\
- + (res).r=(a).r-(b).r; (res).i=(a).i-(b).i; \
- + }while(0)
- +#define C_ADDTO( res , a)\
- + do { \
- + CHECK_OVERFLOW_OP((res).r,+,(a).r)\
- + CHECK_OVERFLOW_OP((res).i,+,(a).i)\
- + (res).r += (a).r; (res).i += (a).i;\
- + }while(0)
- +
- +#define C_SUBFROM( res , a)\
- + do {\
- + CHECK_OVERFLOW_OP((res).r,-,(a).r)\
- + CHECK_OVERFLOW_OP((res).i,-,(a).i)\
- + (res).r -= (a).r; (res).i -= (a).i; \
- + }while(0)
- +
- +
- +#ifdef FIXED_POINT
- +# define HALF_OF(x) ((x)>>1)
- +#else
- +# define HALF_OF(x) ((x)*.5)
- +#endif
- +
- +#define kf_cexp(x, k, n) \
- + do{ \
- + int32_t div = Q_DIV( (k) << 16, (n) << 16, 16 ); \
- + long cos, sin = fsincos(div << 16, &cos); \
- + (x)->r = ( Q_MUL(SAMP_MAX << 16, cos >> 15, 16) ) >> 16; \
- + (x)->i = ( Q_MUL(SAMP_MAX << 16, -1*(sin >> 15), 16) ) >> 16; \
- + }while(0)
- +
- +
- +/* a debugging function */
- +#define pcpx(c)\
- + fprintf(stderr,"%g + %gi\n",(double)((c)->r),(double)((c)->i) )
- diff --git a/apps/plugins/fft/fft.c b/apps/plugins/fft/fft.c
- new file mode 100644
- index 0000000..5b4302d
- --- /dev/null
- +++ b/apps/plugins/fft/fft.c
- @@ -0,0 +1,1204 @@
- +/***************************************************************************
- +* __________ __ ___.
- + * Open \______ \ ____ ____ | | _\_ |__ _______ ___
- + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
- + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
- + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
- + * \/ \/ \/ \/ \/
- + * $Id$
- + *
- + * Copyright (C) 2009 Delyan Kratunov
- + *
- + * This program is free software; you can redistribute it and/or
- + * modify it under the terms of the GNU General Public License
- + * as published by the Free Software Foundation; either version 2
- + * of the License, or (at your option) any later version.
- + *
- + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
- + * KIND, either express or implied.
- + *
- + ****************************************************************************/
- +#include "plugin.h"
- +
- +#include "lib/helper.h"
- +#include "lib/xlcd.h"
- +#include "math.h"
- +
- +PLUGIN_HEADER
- +
- +#if CONFIG_KEYPAD == ARCHOS_AV300_PAD
- +# define FFT_PREV_GRAPH BUTTON_LEFT
- +# define FFT_NEXT_GRAPH BUTTON_RIGHT
- +# define FFT_ORIENTATION BUTTON_F3
- +# define FFT_WINDOW BUTTON_F1
- +# define FFT_SCALE BUTTON_UP
- +# define FFT_COLOR BUTTON_DOWN
- +# define FFT_QUIT BUTTON_OFF
- +
- +#elif (CONFIG_KEYPAD == IRIVER_H100_PAD) || \
- + (CONFIG_KEYPAD == IRIVER_H300_PAD)
- +# define FFT_PREV_GRAPH BUTTON_LEFT
- +# define FFT_NEXT_GRAPH BUTTON_RIGHT
- +# define FFT_ORIENTATION BUTTON_REC
- +# define FFT_WINDOW BUTTON_SELECT
- +# define FFT_SCALE BUTTON_UP
- +# define FFT_COLOR BUTTON_DOWN
- +# define FFT_QUIT BUTTON_OFF
- +
- +#elif (CONFIG_KEYPAD == IPOD_4G_PAD) || \
- + (CONFIG_KEYPAD == IPOD_3G_PAD) || \
- + (CONFIG_KEYPAD == IPOD_1G2G_PAD)
- +# define MINESWP_SCROLLWHEEL
- +# define FFT_PREV_GRAPH BUTTON_LEFT
- +# define FFT_NEXT_GRAPH BUTTON_RIGHT
- +# define FFT_ORIENTATION (BUTTON_SELECT | BUTTON_LEFT)
- +# define FFT_WINDOW (BUTTON_SELECT | BUTTON_RIGHT)
- +# define FFT_SCALE BUTTON_MENU
- +# define FFT_COLOR BUTTON_PLAY
- +# define FFT_QUIT (BUTTON_SELECT | BUTTON_MENU)
- +
- +#elif (CONFIG_KEYPAD == IAUDIO_X5M5_PAD)
- +# define FFT_PREV_GRAPH BUTTON_LEFT
- +# define FFT_NEXT_GRAPH BUTTON_RIGHT
- +# define FFT_ORIENTATION BUTTON_SELECT
- +# define FFT_WINDOW BUTTON_PLAY
- +# define FFT_SCALE BUTTON_UP
- +# define FFT_COLOR BUTTON_DOWN
- +# define FFT_QUIT BUTTON_POWER
- +
- +#elif (CONFIG_KEYPAD == GIGABEAT_PAD)
- +# define FFT_PREV_GRAPH BUTTON_LEFT
- +# define FFT_NEXT_GRAPH BUTTON_RIGHT
- +# define FFT_SCALE BUTTON_UP
- +# define FFT_ORIENTATION BUTTON_SELECT
- +# define FFT_WINDOW BUTTON_A
- +# define FFT_COLOR BUTTON_DOWN
- +# define FFT_QUIT BUTTON_POWER
- +
- +#elif (CONFIG_KEYPAD == SANSA_E200_PAD)
- +# define FFT_PREV_GRAPH BUTTON_LEFT
- +# define FFT_NEXT_GRAPH BUTTON_RIGHT
- +# define FFT_ORIENTATION BUTTON_SELECT
- +# define FFT_WINDOW BUTTON_REC
- +# define FFT_SCALE BUTTON_UP
- +# define FFT_COLOR BUTTON_DOWN
- +# define FFT_QUIT BUTTON_POWER
- +
- +#elif (CONFIG_KEYPAD == SANSA_FUZE_PAD)
- +# define FFT_PREV_GRAPH BUTTON_LEFT
- +# define FFT_NEXT_GRAPH BUTTON_RIGHT
- +# define FFT_ORIENTATION (BUTTON_SELECT | BUTTON_LEFT)
- +# define FFT_WINDOW (BUTTON_SELECT | BUTTON_RIGHT)
- +# define FFT_SCALE BUTTON_UP
- +# define FFT_COLOR BUTTON_DOWN
- +# define FFT_QUIT BUTTON_POWER
- +
- +#elif (CONFIG_KEYPAD == SANSA_C200_PAD) || \
- +(CONFIG_KEYPAD == SANSA_M200_PAD)
- +# define FFT_PREV_GRAPH BUTTON_LEFT
- +# define FFT_NEXT_GRAPH BUTTON_RIGHT
- +# define FFT_ORIENTATION BUTTON_UP
- +# define FFT_WINDOW BUTTON_REC
- +# define FFT_SCALE BUTTON_SELECT
- +# define FFT_COLOR BUTTON_DOWN
- +# define FFT_QUIT BUTTON_POWER
- +#elif (CONFIG_KEYPAD == SANSA_CLIP_PAD)
- +# define FFT_PREV_GRAPH BUTTON_LEFT
- +# define FFT_NEXT_GRAPH BUTTON_RIGHT
- +# define FFT_ORIENTATION BUTTON_UP
- +# define FFT_WINDOW BUTTON_HOME
- +# define FFT_SCALE BUTTON_SELECT
- +# define FFT_COLOR BUTTON_DOWN
- +# define FFT_QUIT BUTTON_POWER
- +
- +#elif (CONFIG_KEYPAD == IRIVER_H10_PAD)
- +# define FFT_PREV_GRAPH BUTTON_LEFT
- +# define FFT_NEXT_GRAPH BUTTON_RIGHT
- +# define FFT_ORIENTATION BUTTON_FF
- +# define FFT_WINDOW BUTTON_SCROLL_UP
- +# define FFT_SCALE BUTTON_REW
- +# define FFT_COLOR BUTTON_PLAY
- +# define FFT_QUIT BUTTON_POWER
- +
- +#elif (CONFIG_KEYPAD == GIGABEAT_S_PAD)
- +# define FFT_PREV_GRAPH BUTTON_LEFT
- +# define FFT_NEXT_GRAPH BUTTON_RIGHT
- +# define FFT_ORIENTATION BUTTON_MENU
- +# define FFT_WINDOW BUTTON_PREV
- +# define FFT_SCALE BUTTON_UP
- +# define FFT_COLOR BUTTON_DOWN
- +# define FFT_QUIT BUTTON_BACK
- +
- +#elif (CONFIG_KEYPAD == MROBE100_PAD)
- +# define FFT_PREV_GRAPH BUTTON_LEFT
- +# define FFT_NEXT_GRAPH BUTTON_RIGHT
- +# define FFT_ORIENTATION BUTTON_PLAY
- +# define FFT_WINDOW BUTTON_SELECT
- +# define FFT_SCALE BUTTON_UP
- +# define FFT_COLOR BUTTON_DOWN
- +# define FFT_QUIT BUTTON_POWER
- +
- +#elif CONFIG_KEYPAD == IAUDIO_M3_PAD
- +# define FFT_PREV_GRAPH BUTTON_RC_REW
- +# define FFT_NEXT_GRAPH BUTTON_RC_FF
- +# define FFT_ORIENTATION BUTTON_RC_MODE
- +# define FFT_WINDOW BUTTON_RC_PLAY
- +# define FFT_SCALE BUTTON_RC_VOL_UP
- +# define FFT_COLOR BUTTON_RC_VOL_DOWN
- +# define FFT_QUIT BUTTON_RC_REC
- +
- +#elif (CONFIG_KEYPAD == COWOND2_PAD)
- +# define FFT_QUIT BUTTON_POWER
- +# define FFT_PREV_GRAPH BUTTON_PLUS
- +# define FFT_NEXT_GRAPH BUTTON_MINUS
- +
- +#elif CONFIG_KEYPAD == CREATIVEZVM_PAD
- +# define FFT_PREV_GRAPH BUTTON_LEFT
- +# define FFT_NEXT_GRAPH BUTTON_RIGHT
- +# define FFT_ORIENTATION BUTTON_MENU
- +# define FFT_WINDOW BUTTON_SELECT
- +# define FFT_SCALE BUTTON_UP
- +# define FFT_COLOR BUTTON_DOWN
- +# define FFT_QUIT BUTTON_BACK
- +
- +#elif CONFIG_KEYPAD == PHILIPS_HDD1630_PAD
- +# define FFT_PREV_GRAPH BUTTON_LEFT
- +# define FFT_NEXT_GRAPH BUTTON_RIGHT
- +# define FFT_ORIENTATION BUTTON_SELECT
- +# define FFT_WINDOW BUTTON_MENU
- +# define FFT_SCALE BUTTON_UP
- +# define FFT_COLOR BUTTON_DOWN
- +# define FFT_QUIT BUTTON_POWER
- +
- +#else
- +#error No keymap defined!
- +#endif
- +
- +#define FFT_SIZE (1024)
- +
- +#include "kiss_fft.h"
- +#include "_kiss_fft_guts.h" /* sizeof(struct kiss_fft_state) */
- +
- +#define ARRAYSIZE_IN FFT_SIZE
- +#define ARRAYSIZE_OUT FFT_SIZE
- +#define ARRAYSIZE_PLOT FFT_SIZE/2
- +#define BUFSIZE (sizeof(struct kiss_fft_state)+sizeof(kiss_fft_cpx)*(FFT_SIZE-1))
- +#define FFT_ALLOC kiss_fft_alloc
- +#define FFT_FFT kiss_fft
- +#define FFT_CFG kiss_fft_cfg
- +
- +static kiss_fft_cpx input[ARRAYSIZE_IN];
- +static kiss_fft_cpx output[ARRAYSIZE_OUT];
- +static int32_t plot[ARRAYSIZE_PLOT];
- +static char buffer[BUFSIZE];
- +
- +/************************* Math functions *************************/
- +#define QLOG_MAX (4 << 16)
- +#define LIN_MAX 1034
- +#define QLIN_MAX 67795525
- +
- +/* Returns logarithmically scaled values in S15.16 format */
- +int32_t get_log_value(int32_t value, bool fraction)
- +{
- + int32_t result;
- +
- + if(fraction)
- + value = Q16_MUL(30720 << 16, Q16_DIV(value, QLIN_MAX)) >> 16;
- + else
- + value = Q16_MUL(30720 << 16, Q16_DIV(value << 16, QLIN_MAX)) >> 16;
- +
- + result = ilog2(value+2048); /* only positive values */
- + result = Q16_DIV(result << 16, 2048 << 16);
- + return result;
- +}
- +
- +/* Apply window function to input
- + * 0 - Hamming window
- + * 1 - Hann window */
- +#define WINDOW_COUNT 2
- +void apply_window_func(char mode)
- +{
- + switch(mode)
- + {
- + case 0: /* Hamming window */
- + {
- + const int32_t hamming_a = float_q(0.53836, 15), hamming_b =
- + float_q(0.46164, 15);
- + size_t i;
- + for (i = 0; i < ARRAYSIZE_IN; ++i)
- + {
- + int32_t cos;
- + (void) fsincos(Q16_DIV(i << 16, (ARRAYSIZE_IN - 1) << 16) << 16,
- + &cos);
- + cos >>= 16;
- +
- + /* value = value * (hamming_a - hamming_b * cos( 2 * pi * i/(ArraySize - 1) ) ) */
- + input[i].r = Q15_MUL(input[i].r << 15,
- + (hamming_a - Q15_MUL(cos, hamming_b))) >> 15;
- + input[i].i = Q15_MUL(input[i].i << 15,
- + (hamming_a - Q15_MUL(cos, hamming_b))) >> 15;
- + }
- + break;
- + }
- + case 1: /* Hann window */
- + {
- + size_t i;
- + for (i = 0; i < ARRAYSIZE_IN; ++i)
- + {
- + int32_t factor;
- + (void) fsincos(Q16_DIV(i << 16, (ARRAYSIZE_IN - 1) << 16) << 16,
- + &factor);
- + /* s16.15; cos( 2* pi * i/(ArraySize - 1))*/
- + factor >>= 16;
- + /* 0.5 * cos( 2* pi * i/(ArraySize - 1))*/
- + factor = Q15_MUL( (1 << 14), factor);
- + /* 0.5 - 0.5 * cos( 2* pi * i/(ArraySize - 1)))*/
- + factor = (1 << 14) - factor;
- +
- + input[i].r = Q15_MUL(input[i].r << 15, factor) >> 15;
- + input[i].i = Q15_MUL(input[i].i << 15, factor) >> 15;
- + }
- + break;
- + }
- + }
- +}
- +
- +/* Calculates the magnitudes from complex numbers and returns the maximum */
- +int32_t calc_magnitudes(bool logarithmic)
- +{
- + int64_t tmp;
- + size_t i;
- +
- + int32_t max = -2147483647;
- +
- + for (i = 0; i < ARRAYSIZE_PLOT; ++i)
- + {
- + tmp = Q16_MUL( ((int32_t) output[i].r) << 16,
- + ((int32_t) output[i].r) << 16);
- + tmp += Q16_MUL( ((int32_t) output[i].i) << 16,
- + ((int32_t) output[i].i) << 16);
- +
- + tmp = fsqrt(tmp & 0x7FFFFFFF , 16);
- +
- + if (logarithmic)
- + {
- + tmp = get_log_value(tmp, true);
- + plot[i] = tmp;
- + }
- + else
- + plot[i] = tmp >> 16;
- +
- + if (plot[i] > max)
- + max = plot[i];
- + }
- + return max;
- +}
- +/************************ End of math functions ***********************/
- +
- +/********************* Plotting functions (modes) *********************/
- +
- +const unsigned char* modes_text[] = { "Lines", "Bars", "Spectrogram" };
- +const unsigned char* scales_text[] = { "Linear scale", "Logarithmic scale" };
- +const unsigned char* window_text[] = { "Hamming window", "Hann window" };
- +#ifdef HAVE_LCD_COLOR
- +# define MODES_COUNT 3
- +#else
- +# define MODES_COUNT 2
- +#endif
- +#define REFRESH_RATE 10
- +
- +struct {
- + bool logarithmic;
- + bool orientation_vertical;
- + int window_func;
- +#ifdef HAVE_LCD_COLOR
- + bool colored;
- +#endif
- +} graph_settings;
- +struct {
- + int column;
- + int row;
- +} spectrogram_settings;
- +
- +#ifdef HAVE_LCD_COLOR
- +#define COLORS 256
- +static unsigned int colors[COLORS] = { LCD_RGBPACK(0, 0, 23), LCD_RGBPACK(0, 0, 26),
- + LCD_RGBPACK(0, 0, 28), LCD_RGBPACK(0, 0, 31), LCD_RGBPACK(0, 0, 33),
- + LCD_RGBPACK(0, 0, 36), LCD_RGBPACK(0, 0, 38), LCD_RGBPACK(0, 0, 41),
- + LCD_RGBPACK(0, 0, 43), LCD_RGBPACK(0, 0, 46), LCD_RGBPACK(0, 0, 48),
- + LCD_RGBPACK(0, 0, 50), LCD_RGBPACK(0, 0, 53), LCD_RGBPACK(0, 0, 55),
- + LCD_RGBPACK(0, 0, 58), LCD_RGBPACK(0, 0, 59), LCD_RGBPACK(0, 0, 62),
- + LCD_RGBPACK(0, 0, 64), LCD_RGBPACK(0, 0, 66), LCD_RGBPACK(0, 0, 69),
- + LCD_RGBPACK(0, 0, 71), LCD_RGBPACK(0, 0, 73), LCD_RGBPACK(0, 0, 75),
- + LCD_RGBPACK(0, 0, 77), LCD_RGBPACK(0, 0, 79), LCD_RGBPACK(1, 0, 81),
- + LCD_RGBPACK(4, 0, 83), LCD_RGBPACK(7, 0, 85), LCD_RGBPACK(9, 0, 87),
- + LCD_RGBPACK(9, 0, 87), LCD_RGBPACK(12, 0, 89), LCD_RGBPACK(15, 0, 91),
- + LCD_RGBPACK(16, 0, 92), LCD_RGBPACK(19, 0, 94), LCD_RGBPACK(22, 0, 96),
- + LCD_RGBPACK(24, 0, 97), LCD_RGBPACK(27, 0, 99),
- + LCD_RGBPACK(30, 0, 101), LCD_RGBPACK(32, 0, 102),
- + LCD_RGBPACK(35, 0, 104), LCD_RGBPACK(38, 0, 105),
- + LCD_RGBPACK(40, 0, 107), LCD_RGBPACK(43, 0, 108),
- + LCD_RGBPACK(45, 0, 109), LCD_RGBPACK(47, 0, 111),
- + LCD_RGBPACK(50, 0, 112), LCD_RGBPACK(53, 0, 113),
- + LCD_RGBPACK(55, 0, 114), LCD_RGBPACK(58, 0, 115),
- + LCD_RGBPACK(60, 0, 116), LCD_RGBPACK(63, 0, 118),
- + LCD_RGBPACK(65, 0, 119), LCD_RGBPACK(68, 0, 120),
- + LCD_RGBPACK(70, 0, 120), LCD_RGBPACK(72, 0, 121),
- + LCD_RGBPACK(75, 0, 122), LCD_RGBPACK(78, 0, 123),
- + LCD_RGBPACK(80, 0, 123), LCD_RGBPACK(83, 0, 124),
- + LCD_RGBPACK(85, 0, 125), LCD_RGBPACK(88, 0, 125),
- + LCD_RGBPACK(90, 0, 126), LCD_RGBPACK(93, 0, 125),
- + LCD_RGBPACK(95, 0, 126), LCD_RGBPACK(97, 0, 126),
- + LCD_RGBPACK(99, 0, 127), LCD_RGBPACK(101, 0, 127),
- + LCD_RGBPACK(101, 0, 127), LCD_RGBPACK(104, 0, 127),
- + LCD_RGBPACK(106, 0, 126), LCD_RGBPACK(109, 0, 127),
- + LCD_RGBPACK(111, 0, 127), LCD_RGBPACK(114, 0, 126),
- + LCD_RGBPACK(116, 0, 127), LCD_RGBPACK(118, 0, 127),
- + LCD_RGBPACK(120, 0, 127), LCD_RGBPACK(123, 0, 126),
- + LCD_RGBPACK(125, 0, 125), LCD_RGBPACK(127, 0, 126),
- + LCD_RGBPACK(130, 0, 125), LCD_RGBPACK(131, 0, 124),
- + LCD_RGBPACK(134, 0, 124), LCD_RGBPACK(136, 0, 123),
- + LCD_RGBPACK(138, 0, 122), LCD_RGBPACK(140, 0, 122),
- + LCD_RGBPACK(142, 0, 121), LCD_RGBPACK(144, 0, 120),
- + LCD_RGBPACK(147, 0, 119), LCD_RGBPACK(149, 0, 119),
- + LCD_RGBPACK(151, 0, 118), LCD_RGBPACK(153, 0, 117),
- + LCD_RGBPACK(155, 0, 115), LCD_RGBPACK(157, 0, 114),
- + LCD_RGBPACK(159, 0, 113), LCD_RGBPACK(162, 0, 112),
- + LCD_RGBPACK(164, 0, 111), LCD_RGBPACK(165, 0, 110),
- + LCD_RGBPACK(167, 0, 109), LCD_RGBPACK(169, 0, 108),
- + LCD_RGBPACK(171, 0, 106), LCD_RGBPACK(173, 0, 105),
- + LCD_RGBPACK(175, 0, 103), LCD_RGBPACK(176, 0, 102),
- + LCD_RGBPACK(178, 0, 100), LCD_RGBPACK(178, 0, 100),
- + LCD_RGBPACK(180, 0, 98), LCD_RGBPACK(182, 0, 97),
- + LCD_RGBPACK(184, 0, 95), LCD_RGBPACK(186, 0, 93),
- + LCD_RGBPACK(188, 0, 91), LCD_RGBPACK(189, 0, 89),
- + LCD_RGBPACK(190, 0, 87), LCD_RGBPACK(192, 0, 86),
- + LCD_RGBPACK(194, 0, 84), LCD_RGBPACK(196, 0, 82),
- + LCD_RGBPACK(197, 0, 80), LCD_RGBPACK(199, 0, 78),
- + LCD_RGBPACK(201, 0, 76), LCD_RGBPACK(202, 0, 74),
- + LCD_RGBPACK(204, 0, 72), LCD_RGBPACK(206, 0, 70),
- + LCD_RGBPACK(207, 0, 67), LCD_RGBPACK(209, 0, 65),
- + LCD_RGBPACK(210, 0, 63), LCD_RGBPACK(212, 0, 60),
- + LCD_RGBPACK(213, 0, 58), LCD_RGBPACK(215, 0, 56),
- + LCD_RGBPACK(216, 0, 53), LCD_RGBPACK(216, 0, 52),
- + LCD_RGBPACK(218, 0, 49), LCD_RGBPACK(219, 0, 47),
- + LCD_RGBPACK(221, 0, 44), LCD_RGBPACK(222, 0, 42),
- + LCD_RGBPACK(223, 0, 39), LCD_RGBPACK(224, 0, 37),
- + LCD_RGBPACK(226, 0, 34), LCD_RGBPACK(227, 0, 32),
- + LCD_RGBPACK(228, 0, 29), LCD_RGBPACK(229, 0, 27),
- + LCD_RGBPACK(230, 0, 25), LCD_RGBPACK(231, 0, 22),
- + LCD_RGBPACK(232, 0, 19), LCD_RGBPACK(232, 0, 19),
- + LCD_RGBPACK(233, 0, 17), LCD_RGBPACK(235, 0, 14),
- + LCD_RGBPACK(236, 0, 12), LCD_RGBPACK(237, 0, 9),
- + LCD_RGBPACK(238, 0, 6), LCD_RGBPACK(239, 0, 4), LCD_RGBPACK(239, 0, 1),
- + LCD_RGBPACK(240, 1, 0), LCD_RGBPACK(241, 6, 0),
- + LCD_RGBPACK(242, 11, 0), LCD_RGBPACK(243, 16, 0),
- + LCD_RGBPACK(244, 21, 0), LCD_RGBPACK(244, 26, 0),
- + LCD_RGBPACK(245, 31, 0), LCD_RGBPACK(246, 36, 0),
- + LCD_RGBPACK(247, 41, 0), LCD_RGBPACK(247, 46, 0),
- + LCD_RGBPACK(247, 50, 0), LCD_RGBPACK(248, 55, 0),
- + LCD_RGBPACK(248, 60, 0), LCD_RGBPACK(249, 65, 0),
- + LCD_RGBPACK(249, 70, 0), LCD_RGBPACK(250, 75, 0),
- + LCD_RGBPACK(250, 79, 0), LCD_RGBPACK(251, 84, 0),
- + LCD_RGBPACK(252, 89, 0), LCD_RGBPACK(251, 94, 0),
- + LCD_RGBPACK(252, 99, 0), LCD_RGBPACK(253, 103, 0),
- + LCD_RGBPACK(252, 108, 0),
- + LCD_RGBPACK(253, 112, 0), LCD_RGBPACK(254, 117, 0),
- + LCD_RGBPACK(254, 121, 0), LCD_RGBPACK(253, 125, 0),
- + LCD_RGBPACK(254, 130, 0), LCD_RGBPACK(255, 134, 0),
- + LCD_RGBPACK(255, 137, 0), LCD_RGBPACK(255, 138, 0),
- + LCD_RGBPACK(255, 142, 0), LCD_RGBPACK(255, 147, 0),
- + LCD_RGBPACK(255, 151, 0), LCD_RGBPACK(255, 154, 0),
- + LCD_RGBPACK(255, 158, 0), LCD_RGBPACK(255, 162, 0),
- + LCD_RGBPACK(255, 166, 0), LCD_RGBPACK(255, 170, 0),
- + LCD_RGBPACK(255, 174, 0), LCD_RGBPACK(255, 178, 0),
- + LCD_RGBPACK(255, 181, 0), LCD_RGBPACK(255, 184, 0),
- + LCD_RGBPACK(255, 187, 0), LCD_RGBPACK(255, 191, 0),
- + LCD_RGBPACK(255, 194, 0), LCD_RGBPACK(255, 197, 0),
- + LCD_RGBPACK(255, 201, 0), LCD_RGBPACK(255, 204, 3),
- + LCD_RGBPACK(255, 207, 8), LCD_RGBPACK(255, 210, 12),
- + LCD_RGBPACK(255, 213, 17), LCD_RGBPACK(255, 215, 21),
- + LCD_RGBPACK(255, 217, 26), LCD_RGBPACK(255, 220,30),
- + LCD_RGBPACK(255, 223, 34), LCD_RGBPACK(255, 225, 39),
- + LCD_RGBPACK(255, 228, 44),
- + LCD_RGBPACK(255, 229, 48), LCD_RGBPACK(255, 231, 53),
- + LCD_RGBPACK(255, 233, 57),
- + LCD_RGBPACK(255, 235, 61), LCD_RGBPACK(255, 237, 66),
- + LCD_RGBPACK(255, 239, 71),
- + LCD_RGBPACK(255, 241, 75), LCD_RGBPACK(255, 243, 80),
- + LCD_RGBPACK(255, 244, 84),
- + LCD_RGBPACK(255, 246, 88), LCD_RGBPACK(255, 246, 88),
- + LCD_RGBPACK(255, 247, 93),
- + LCD_RGBPACK(255, 248, 97), LCD_RGBPACK(255, 249, 102),
- + LCD_RGBPACK(255, 250, 107), LCD_RGBPACK(255, 251, 111),
- + LCD_RGBPACK(255, 251, 115), LCD_RGBPACK(255, 252, 120),
- + LCD_RGBPACK(255, 252, 124), LCD_RGBPACK(255, 253, 129),
- + LCD_RGBPACK(255, 253, 133), LCD_RGBPACK(255, 254, 138),
- + LCD_RGBPACK(255, 255, 143), LCD_RGBPACK(255, 255, 147),
- + LCD_RGBPACK(255, 255, 151), LCD_RGBPACK(255, 255, 156),
- + LCD_RGBPACK(255, 255, 160), LCD_RGBPACK(255, 255, 165),
- + LCD_RGBPACK(255, 255, 170), LCD_RGBPACK(255, 255, 174),
- + LCD_RGBPACK(255, 255, 178), LCD_RGBPACK(255, 255, 183),
- + LCD_RGBPACK(255, 255, 187), LCD_RGBPACK(255, 255, 192),
- + LCD_RGBPACK(255, 255, 196), LCD_RGBPACK(255, 255, 200),
- + LCD_RGBPACK(255, 255, 205), LCD_RGBPACK(255, 255, 210),
- + LCD_RGBPACK(255, 255, 214), LCD_RGBPACK(255, 255, 219),
- + LCD_RGBPACK(255, 255, 223), LCD_RGBPACK(255, 255, 227),
- + LCD_RGBPACK(255, 255, 232), LCD_RGBPACK(255, 255, 236),
- + LCD_RGBPACK(255, 255, 241), LCD_RGBPACK(255, 255, 246),
- + LCD_RGBPACK(255, 255, 250), LCD_RGBPACK(255, 255, 255) };
- +#endif
- +static long next_update = 0;
- +
- +void draw_lines_vertical(void);
- +void draw_lines_horizontal(void);
- +void draw_bars_vertical(void);
- +void draw_bars_horizontal(void);
- +void draw_spectrogram_vertical(void);
- +void draw_spectrogram_horizontal(void);
- +
- +void draw(char mode, const unsigned char* message)
- +{
- + static uint32_t show_message = 0, last_mode = 0;
- + static bool last_orientation = true;
- + static unsigned char* last_message = 0;
- + if (message != 0)
- + {
- + last_message = (unsigned char*) message;
- + show_message = 5;
- + }
- +
- + switch (mode)
- + {
- + default:
- + case 0: {
- + rb->lcd_clear_display();
- +
- + if (graph_settings.orientation_vertical)
- + draw_lines_vertical();
- + else
- + draw_lines_horizontal();
- +
- + last_mode = 0;
- + spectrogram_settings.row = 0; spectrogram_settings.column = 0;
- + break;
- + }
- + case 1: {
- + rb->lcd_clear_display();
- +
- + if(graph_settings.orientation_vertical)
- + draw_bars_vertical();
- + else
- + draw_bars_horizontal();
- +
- + last_mode = 1;
- + spectrogram_settings.row = 0; spectrogram_settings.column = 0;
- + break;
- + }
- +# ifdef HAVE_LCD_COLOR
- + case 2: {
- + if(last_mode != 2 ||
- + graph_settings.orientation_vertical != last_orientation)
- + {
- + spectrogram_settings.row = 0; spectrogram_settings.column = 0;
- + rb->lcd_clear_display();
- + }
- + if(graph_settings.orientation_vertical)
- + draw_spectrogram_vertical();
- + else
- + draw_spectrogram_horizontal();
- +
- + last_mode = 2;
- + break;
- + }
- +# endif
- + }
- +
- + if (show_message > 0)
- + {
- + int x, y;
- + rb->lcd_getstringsize(last_message, &x, &y);
- + x += 6; /* 3 px of horizontal padding and */
- + y += 4; /* 2 px of vertical padding */
- +
- +# ifdef HAVE_LCD_COLOR
- + if(mode == 2)
- + {
- + if (graph_settings.orientation_vertical)
- + {
- + if(spectrogram_settings.column > LCD_WIDTH-x-2)
- + {
- + xlcd_scroll_left(spectrogram_settings.column -
- + (LCD_WIDTH - x - 1));
- + spectrogram_settings.column = LCD_WIDTH - x - 2;
- + }
- + }
- + }
- +# endif
- +
- +#if LCD_DEPTH > 2
- + rb->lcd_set_foreground(LCD_DARKGRAY);
- + rb->lcd_fillrect(LCD_WIDTH-1-x, 0, LCD_WIDTH-1, y);
- +
- + rb->lcd_set_foreground(LCD_DEFAULT_FG);
- + rb->lcd_set_background(LCD_DARKGRAY);
- +#endif
- + rb->lcd_putsxy(LCD_WIDTH-1-x+3, 2, last_message);
- +#if LCD_DEPTH > 1
- + rb->lcd_set_background(LCD_DEFAULT_BG);
- +#endif
- +
- + show_message--;
- +
- +# ifdef HAVE_LCD_COLOR
- + if(show_message == 0 && mode == 2)
- + {
- + if(graph_settings.orientation_vertical)
- + {
- + rb->lcd_set_drawmode(DRMODE_SOLID | DRMODE_INVERSEVID);
- + rb->lcd_fillrect(LCD_WIDTH-2-x, 0, LCD_WIDTH-1, y);
- + rb->lcd_set_drawmode(DRMODE_SOLID);
- + }
- + else
- + {
- + xlcd_scroll_up(y);
- + spectrogram_settings.row -= y;
- + if(spectrogram_settings.row < 0)
- + spectrogram_settings.row = 0;
- + }
- + }
- +# endif
- + }
- +
- + last_orientation = graph_settings.orientation_vertical;
- +
- + rb->lcd_update();
- +
- + /* we still have time in our time slot, so we sleep() */
- + if (*rb->current_tick < next_update)
- + rb->sleep(next_update - *rb->current_tick);
- +
- + /* end of next time slot */
- + next_update = *rb->current_tick + HZ / REFRESH_RATE;
- +}
- +
- +void draw_lines_vertical(void)
- +{
- + static int max = 0;
- + static bool last_mode = false;
- +
- + static const int32_t hfactor =
- + Q15_DIV(LCD_WIDTH << 15, (ARRAYSIZE_PLOT) << 15),
- + bins_per_pixel = (ARRAYSIZE_PLOT) / LCD_WIDTH;
- +
- + if (graph_settings.logarithmic != last_mode)
- + {
- + max = 0; /* reset the graph on scaling mode change */
- + last_mode = graph_settings.logarithmic;
- + }
- + int32_t new_max = calc_magnitudes(graph_settings.logarithmic);
- +
- + if (new_max > max)
- + max = new_max;
- +
- + if (new_max == 0 || max == 0) /* nothing to draw */
- + return;
- +
- + int32_t vfactor;
- +
- + if (graph_settings.logarithmic)
- + vfactor = Q16_DIV(LCD_HEIGHT << 16, max); /* s15.16 */
- + else
- + vfactor = Q15_DIV(LCD_HEIGHT << 15, max << 15); /* s16.15 */
- +
- +#ifdef HAVE_LCD_COLOR
- + if(graph_settings.colored)
- + {
- + int line;
- + for(line = 0; line < LCD_HEIGHT; ++line)
- + {
- + int32_t color = Q16_DIV((line+1) << 16, LCD_HEIGHT << 16);
- + color = Q16_MUL(color, (COLORS-1) << 16) >> 16;
- + rb->lcd_set_foreground(colors[color]);
- + rb->lcd_hline(0, LCD_WIDTH-1, LCD_HEIGHT-line-1);
- + }
- + /* Erase the lines with the background color */
- + rb->lcd_set_foreground(rb->lcd_get_background());
- + }
- +#endif
- +
- + /* take the average of neighboring bins
- + * if we have to scale the graph horizontally */
- + int64_t bins_avg = 0;
- + bool draw = true;
- + int32_t i;
- + for (i = 0; i < ARRAYSIZE_PLOT; ++i)
- + {
- + int32_t x = 0, y = 0;
- +
- + x = Q15_MUL(hfactor, i << 15);
- + x += (1 << 14);
- + x >>= 15;
- +
- + if (hfactor < 32768) /* hfactor < 0, graph compression */
- + {
- + draw = false;
- + bins_avg += plot[i];
- +
- + /* fix the division by zero warning:
- + * bins_per_pixel is zero when the graph is expanding;
- + * execution won't even reach this point - this is a dummy constant
- + */
- + const int32_t div = bins_per_pixel > 0 ? bins_per_pixel : 1;
- + if ((i + 1) % div == 0)
- + {
- + if (graph_settings.logarithmic)
- + {
- + bins_avg = Q16_DIV(bins_avg, div << 16);
- + y = Q16_MUL(vfactor, bins_avg) >> 16;
- + }
- + else
- + {
- + bins_avg = Q15_DIV(bins_avg << 15, div << 15);
- + bins_avg += (1 << 14); /* rounding up */
- +
- + y = Q15_MUL(vfactor, bins_avg) >> 15;
- + }
- +
- + bins_avg = 0;
- + draw = true;
- + }
- + }
- + else
- + {
- + y = Q15_MUL(vfactor, plot[i] << 15) >> 15;
- + draw = true;
- + }
- +
- + if (draw)
- + {
- +# ifdef HAVE_LCD_COLOR
- + if(graph_settings.colored)
- + rb->lcd_vline(x, 0, LCD_HEIGHT-y);
- + else
- +# endif
- + rb->lcd_vline(x, LCD_HEIGHT-1, LCD_HEIGHT-y-1);
- + }
- + }
- +# ifdef HAVE_LCD_COLOR
- + rb->lcd_set_foreground(LCD_DEFAULT_FG);
- +# endif
- +}
- +
- +void draw_lines_horizontal(void)
- +{
- + static int max = 0;
- + static bool last_mode = false;
- +
- + static const int32_t vfactor =
- + Q15_DIV(LCD_HEIGHT << 15, (ARRAYSIZE_PLOT) << 15),
- + bins_per_pixel = (ARRAYSIZE_PLOT) / LCD_HEIGHT;
- +
- + if (graph_settings.logarithmic != last_mode)
- + {
- + max = 0; /* reset the graph on scaling mode change */
- + last_mode = graph_settings.logarithmic;
- + }
- + int32_t new_max = calc_magnitudes(graph_settings.logarithmic);
- +
- + if (new_max > max)
- + max = new_max;
- +
- + if (new_max == 0 || max == 0) /* nothing to draw */
- + return;
- +
- + int32_t hfactor;
- +
- + if (graph_settings.logarithmic)
- + hfactor = Q16_DIV((LCD_WIDTH - 1) << 16, max); /* s15.16 */
- + else
- + hfactor = Q15_DIV((LCD_WIDTH - 1) << 15, max << 15); /* s16.15 */
- +
- +#ifdef HAVE_LCD_COLOR
- + if(graph_settings.colored)
- + {
- + int line;
- + for(line = 0; line < LCD_WIDTH; ++line)
- + {
- + int32_t color = Q16_DIV((line+1) << 16, LCD_WIDTH << 16);
- + color = Q16_MUL(color, (COLORS-1) << 16) >> 16;
- + rb->lcd_set_foreground(colors[color]);
- + rb->lcd_vline(line, 0, LCD_HEIGHT-1);
- + }
- + /* Erase the lines with the background color */
- + rb->lcd_set_foreground(rb->lcd_get_background());
- + }
- +#endif
- +
- + /* take the average of neighboring bins
- + * if we have to scale the graph horizontally */
- + int64_t bins_avg = 0;
- + bool draw = true;
- + int32_t i;
- + for (i = 0; i < ARRAYSIZE_PLOT; ++i)
- + {
- + int32_t x = 0, y = 0;
- +
- + y = Q15_MUL(vfactor, i << 15) + (1 << 14);
- + y >>= 15;
- +
- + if (vfactor < 32768) /* vfactor < 0, graph compression */
- + {
- + draw = false;
- + bins_avg += plot[i];
- +
- + /* fix the division by zero warning:
- + * bins_per_pixel is zero when the graph is expanding;
- + * execution won't even reach this point - this is a dummy constant
- + */
- + const int32_t div = bins_per_pixel > 0 ? bins_per_pixel : 1;
- + if ((i + 1) % div == 0)
- + {
- + if (graph_settings.logarithmic)
- + {
- + bins_avg = Q16_DIV(bins_avg, div << 16);
- +
- + x = Q16_MUL(hfactor, bins_avg) >> 16;
- + }
- + else
- + {
- + bins_avg = Q15_DIV(bins_avg << 15, div << 15);
- + bins_avg += (1 << 14); /* rounding up */
- +
- + x = Q15_MUL(hfactor, bins_avg) >> 15;
- + }
- +
- + bins_avg = 0;
- + draw = true;
- + }
- + }
- + else
- + {
- + y = Q15_MUL(hfactor, plot[i] << 15) >> 15;
- + draw = true;
- + }
- +
- + if (draw)
- + {
- +# ifdef HAVE_LCD_COLOR
- + if(graph_settings.colored)
- + {
- + rb->lcd_hline(LCD_WIDTH-1, x, y);
- + }
- + else
- +# endif
- + rb->lcd_hline(0, x, y);
- + }
- + }
- +# ifdef HAVE_LCD_COLOR
- + rb->lcd_set_foreground(LCD_DEFAULT_FG);
- +# endif
- +}
- +
- +void draw_bars_vertical(void)
- +{
- + static const unsigned int bars = 12, border = 3, items = ARRAYSIZE_PLOT
- + / bars, width = (LCD_WIDTH - ((bars - 1) * border)) / bars;
- +
- + calc_magnitudes(graph_settings.logarithmic);
- +
- + rb->lcd_set_foreground(LCD_DEFAULT_FG);
- + int64_t bars_values[bars], bars_max = 0, avg = 0;
- + unsigned int i, bars_idx = 0;
- + for (i = 0; i < ARRAYSIZE_PLOT; ++i)
- + {
- + avg += plot[i];
- + if ((i + 1) % items == 0)
- + {
- + /* Calculate the average value and keep the fractional part
- + * for some added precision */
- + if (graph_settings.logarithmic)
- + avg = Q16_DIV(avg, items << 16); /* s15.16 */
- + else
- + avg = Q15_DIV(avg << 15, items << 15); /* s16.15 */
- + bars_values[bars_idx] = avg;
- +
- + if (bars_values[bars_idx] > bars_max)
- + bars_max = bars_values[bars_idx];
- +
- + bars_idx++;
- + avg = 0;
- + }
- + }
- +
- + if(bars_max == 0) /* nothing to draw */
- + return;
- +
- + /* Give the graph some headroom */
- + bars_max = Q15_MUL(bars_max, float_q15(1.1));
- +
- + int64_t vfactor;
- + if (graph_settings.logarithmic)
- + vfactor = Q16_DIV(LCD_HEIGHT << 16, bars_max);
- + else
- + vfactor = Q15_DIV(LCD_HEIGHT << 15, bars_max);
- +
- + for (i = 0; i < bars; ++i)
- + {
- + int x = (i) * (border + width);
- + int y;
- + if (graph_settings.logarithmic)
- + {
- + y = Q16_MUL(vfactor, bars_values[i]);
- + y += (1 << 15);
- + y >>= 16;
- + }
- + else
- + {
- + y = Q15_MUL(vfactor, bars_values[i]);
- + y += (1 << 14);
- + y >>= 15;
- + }
- +
- + rb->lcd_fillrect(x, LCD_HEIGHT - y, width, y);
- + }
- +}
- +
- +void draw_bars_horizontal(void)
- +{
- + static const unsigned int bars = 12, border = 3, items = ARRAYSIZE_PLOT
- + / bars, height = (LCD_HEIGHT - ((bars - 1) * border)) / bars;
- +
- + calc_magnitudes(graph_settings.logarithmic);
- +
- + rb->lcd_set_foreground(LCD_DEFAULT_FG);
- + int64_t bars_values[bars], bars_max = 0, avg = 0;
- + unsigned int i, bars_idx = 0;
- + for (i = 0; i < ARRAYSIZE_PLOT; ++i)
- + {
- + avg += plot[i];
- + if ((i + 1) % items == 0)
- + {
- + /* Calculate the average value and keep the fractional part
- + * for some added precision */
- + if (graph_settings.logarithmic)
- + avg = Q16_DIV(avg, items << 16); /* s15.16 */
- + else
- + avg = Q15_DIV(avg << 15, items << 15); /* s16.15 */
- + bars_values[bars_idx] = avg;
- +
- + if (bars_values[bars_idx] > bars_max)
- + bars_max = bars_values[bars_idx];
- +
- + bars_idx++;
- + avg = 0;
- + }
- + }
- +
- + if(bars_max == 0) /* nothing to draw */
- + return;
- +
- + /* Give the graph some headroom */
- + bars_max = Q15_MUL(bars_max, float_q15(1.1));
- +
- + int64_t hfactor;
- + if (graph_settings.logarithmic)
- + hfactor = Q16_DIV(LCD_WIDTH << 16, bars_max);
- + else
- + hfactor = Q15_DIV(LCD_WIDTH << 15, bars_max);
- +
- + for (i = 0; i < bars; ++i)
- + {
- + int y = (i) * (border + height);
- + int x;
- + if (graph_settings.logarithmic)
- + {
- + x = Q16_MUL(hfactor, bars_values[i]);
- + x += (1 << 15);
- + x >>= 16;
- + }
- + else
- + {
- + x = Q15_MUL(hfactor, bars_values[i]);
- + x += (1 << 14);
- + x >>= 15;
- + }
- +
- + rb->lcd_fillrect(0, y, x, height);
- + }
- +}
- +
- +#ifdef HAVE_LCD_COLOR
- +void draw_spectrogram_vertical(void)
- +{
- + const int32_t scale_factor =
- + ( Q15_DIV(ARRAYSIZE_PLOT << 15, LCD_HEIGHT << 15) + (1<<14) ) >> 15,
- + remaining_div =
- + ( Q15_DIV((scale_factor*LCD_HEIGHT) << 15,
- + (ARRAYSIZE_PLOT-scale_factor*LCD_HEIGHT) << 15)
- + + (1<<14) ) >> 15;
- +
- + calc_magnitudes(graph_settings.logarithmic);
- +
- + int i, y = LCD_HEIGHT-1, count = 0, rem_count = 0;
- + int64_t avg = 0;
- + for(i = 0; i < ARRAYSIZE_PLOT; ++i)
- + {
- + avg += plot[i];
- + ++count;
- + ++rem_count;
- +
- + /* Kinda hacky - due to the rounding in scale_factor, we try to
- + * uniformly interweave the extra values in our calculations */
- + if(remaining_div > 0 && rem_count == remaining_div &&
- + (i+1) < ARRAYSIZE_PLOT)
- + {
- + ++i;
- + avg += plot[i];
- + rem_count = 0;
- + }
- +
- + if(count >= scale_factor)
- + {
- + if(rem_count == 0) /* if we just added an extra value */
- + ++count;
- +
- + int32_t color;
- + if(graph_settings.logarithmic)
- + {
- + avg = Q16_DIV(avg, count << 16);
- + color = Q16_DIV(avg, QLOG_MAX);
- + color = Q16_MUL(color, (COLORS-1) << 16) >> 16;
- + }
- + else
- + {
- + avg = Q15_DIV(avg << 15, count << 15);
- + color = Q15_DIV(avg, LIN_MAX << 15);
- + color = Q15_MUL(color, (COLORS-1) << 15) >> 15;
- + }
- + rb->lcd_set_foreground(colors[color]);
- + rb->lcd_drawpixel(spectrogram_settings.column, y);
- +
- + y--;
- +
- + avg = 0;
- + count = 0;
- + }
- + }
- + if(spectrogram_settings.column != LCD_WIDTH - 1)
- + spectrogram_settings.column++;
- + else
- + xlcd_scroll_left(1);
- +}
- +void draw_spectrogram_horizontal(void)
- +{
- + const int32_t scale_factor =
- + ( Q15_DIV(ARRAYSIZE_PLOT << 15, LCD_WIDTH << 15)) >> 15,
- + remaining_div =
- + ( Q15_DIV((scale_factor*LCD_WIDTH) << 15,
- + (ARRAYSIZE_PLOT-scale_factor*LCD_WIDTH) << 15)
- + + (1<<14) ) >> 15;
- +
- + calc_magnitudes(graph_settings.logarithmic);
- +
- + int i, x = 0, count = 0, rem_count = 0;
- + int64_t avg = 0;
- + for(i = 0; i < ARRAYSIZE_PLOT; ++i)
- + {
- + avg += plot[i];
- + ++count;
- + ++rem_count;
- +
- + /* Kinda hacky - due to the rounding in scale_factor, we try to
- + * uniformly interweave the extra values in our calculations */
- + if(remaining_div > 0 && rem_count == remaining_div &&
- + (i+1) < ARRAYSIZE_PLOT)
- + {
- + ++i;
- + avg += plot[i];
- + rem_count = 0;
- + }
- +
- + if(count >= scale_factor)
- + {
- + if(rem_count == 0) /* if we just added an extra value */
- + ++count;
- +
- + int32_t color;
- + if(graph_settings.logarithmic)
- + {
- + avg = Q16_DIV(avg, count << 16);
- + color = Q16_DIV(avg, QLOG_MAX);
- + color = Q16_MUL(color, (COLORS-1) << 16) >> 16;
- + }
- + else
- + {
- + avg = Q15_DIV(avg << 15, count << 15);
- + color = Q15_DIV(avg, LIN_MAX << 15);
- + color = Q15_MUL(color, (COLORS-1) << 15) >> 15;
- + }
- + rb->lcd_set_foreground(colors[color]);
- + rb->lcd_drawpixel(x, spectrogram_settings.row);
- +
- + x++;
- +
- + avg = 0;
- + count = 0;
- + }
- + }
- + if(spectrogram_settings.row != LCD_HEIGHT-1)
- + spectrogram_settings.row++;
- + else
- + xlcd_scroll_up(1);
- +}
- +#endif
- +/********************* End of plotting functions (modes) *********************/
- +
- +enum plugin_status plugin_start(const void* parameter)
- +{
- + (void) parameter;
- + if ((rb->audio_status() & AUDIO_STATUS_PLAY) == 0)
- + {
- + rb->splash(HZ * 2, "No track playing. Exiting..");
- + return PLUGIN_OK;
- + }
- +
- +#if LCD_DEPTH > 1
- + rb->lcd_set_backdrop(NULL);
- +#endif
- + backlight_force_on();
- +
- +#ifdef HAVE_ADJUSTABLE_CPU_FREQ
- + rb->cpu_boost(true);
- +#endif
- +
- + /* Defaults */
- + bool run = true;
- + int mode = 0;
- + graph_settings.logarithmic = true;
- + graph_settings.orientation_vertical = true;
- + graph_settings.window_func = 0;
- +#ifdef HAVE_LCD_COLOR
- + graph_settings.colored = false;
- +#endif
- + bool changed_window = false;
- +
- + /* set the end of the first time slot - rest of the
- + * next_update work is done in draw() */
- + next_update = *rb->current_tick + HZ / REFRESH_RATE;
- +
- + size_t size = sizeof(buffer);
- + FFT_CFG state = FFT_ALLOC(FFT_SIZE, 0, buffer, &size);
- +
- + if (state == 0)
- + {
- + DEBUGF("needed data: %i", (int) size);
- + return PLUGIN_ERROR;
- + }
- +
- + /* taken out of the main loop for efficiency (?)*/
- + kiss_fft_scalar left, right;
- + kiss_fft_scalar* value;
- + int count;
- +
- + while (run)
- + {
- + value = (kiss_fft_scalar*) rb->pcm_get_peak_buffer(&count);
- + if (value == 0 || count == 0)
- + {
- + rb->yield();
- + continue;
- + }
- +
- + int idx = 0; /* offset in the buffer */
- + int fft_idx = 0; /* offset in input */
- +
- + do
- + {
- + left = *(value + idx);
- + idx += 2;
- +
- + right = *(value + idx);
- + idx += 2;
- +
- + input[fft_idx].r = left;
- + input[fft_idx].i = right;
- + fft_idx++;
- +
- + if (fft_idx == ARRAYSIZE_IN)
- + break;
- + } while (idx < count);
- +
- + if (fft_idx == ARRAYSIZE_IN)
- + {
- + apply_window_func(graph_settings.window_func);
- +
- + /* Play nice - the sleep at the end of draw()
- + * only tries to maintain the frame rate */
- + rb->yield();
- + FFT_FFT(state, input, output);
- + if(changed_window)
- + {
- + draw(mode, window_text[graph_settings.window_func]);
- + changed_window = false;
- + }
- + else
- + draw(mode, 0);
- +
- + fft_idx = 0;
- + };
- +
- + int button = rb->button_get(false);
- + switch (button)
- + {
- + case FFT_QUIT:
- + run = false;
- + break;
- + case FFT_PREV_GRAPH: {
- + mode -= 1;
- + if (mode < 0)
- + mode = MODES_COUNT-1;
- + draw(mode, modes_text[(int) mode]);
- + break;
- + }
- + case FFT_NEXT_GRAPH: {
- + mode += 1;
- + if (mode >= MODES_COUNT)
- + mode = 0;
- + draw(mode, modes_text[(int) mode]);
- + break;
- + }
- + case FFT_WINDOW: {
- + changed_window = true;
- + graph_settings.window_func ++;
- + if(graph_settings.window_func >= WINDOW_COUNT)
- + graph_settings.window_func = 0;
- + break;
- + }
- + case FFT_SCALE: {
- + graph_settings.logarithmic = !graph_settings.logarithmic;
- + draw(mode, scales_text[graph_settings.logarithmic ? 1 : 0]);
- + break;
- + }
- + case FFT_ORIENTATION: {
- + graph_settings.orientation_vertical = !graph_settings.orientation_vertical;
- + draw(mode, 0);
- + break;
- + }
- +# ifdef HAVE_LCD_COLOR
- + case FFT_COLOR: {
- + graph_settings.colored = !graph_settings.colored;
- + draw(mode, 0);
- + break;
- + }
- +# endif
- + default: {
- + if (rb->default_event_handler(button) == SYS_USB_CONNECTED)
- + return PLUGIN_USB_CONNECTED;
- + }
- +
- + }
- + }
- + backlight_use_settings();
- + return PLUGIN_OK;
- +}
- diff --git a/apps/plugins/fft/fft.make b/apps/plugins/fft/fft.make
- new file mode 100644
- index 0000000..b14566c
- --- /dev/null
- +++ b/apps/plugins/fft/fft.make
- @@ -0,0 +1,27 @@
- +# __________ __ ___.
- +# Open \______ \ ____ ____ | | _\_ |__ _______ ___
- +# Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
- +# Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
- +# Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
- +# \/ \/ \/ \/ \/
- +# $Id$
- +#
- +
- +FFTSRCDIR := $(APPSDIR)/plugins/fft
- +FFTBUILDDIR := $(BUILDDIR)/apps/plugins/fft
- +
- +ROCKS += $(FFTBUILDDIR)/fft.rock
- +
- +FFT_SRC := $(call preprocess, $(FFTSRCDIR)/SOURCES)
- +FFT_OBJ := $(call c2obj, $(FFT_SRC))
- +
- +# add source files to OTHER_SRC to get automatic dependencies
- +OTHER_SRC += $(FFT_SRC)
- +
- +FFTFLAGS = $(filter-out -O%,$(PLUGINFLAGS)) -O3 -DFIXED_POINT=16
- +
- +$(FFTBUILDDIR)/fft.rock: $(FFT_OBJ)
- +
- +$(FFTBUILDDIR)/%.o: $(FFTSRCDIR)/%.c $(FFTSRCDIR)/fft.make
- + $(SILENT)mkdir -p $(dir $@)
- + $(call PRINTS,CC $(subst $(ROOTDIR)/,,$<))$(CC) -I$(dir $<) $(FFTFLAGS) -c $< -o $@
- diff --git a/apps/plugins/fft/kiss_fft.c b/apps/plugins/fft/kiss_fft.c
- new file mode 100644
- index 0000000..b3fb50c
- --- /dev/null
- +++ b/apps/plugins/fft/kiss_fft.c
- @@ -0,0 +1,428 @@
- +/*
- +Copyright (c) 2003-2004, Mark Borgerding
- +
- +All rights reserved.
- +
- +Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
- +
- + * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
- + * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
- + * Neither the author nor the names of any contributors may be used to endorse or promote products derived from this software without specific prior written permission.
- +
- +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- +*/
- +
- +
- +#include "_kiss_fft_guts.h"
- +/* The guts header contains all the multiplication and addition macros that are defined for
- + fixed or floating point complex numbers. It also delares the kf_ internal functions.
- + */
- +
- +static kiss_fft_cpx *scratchbuf=NULL;
- +static size_t nscratchbuf=0;
- +static kiss_fft_cpx *tmpbuf=NULL;
- +static size_t ntmpbuf=0;
- +
- +#define CHECKBUF(buf,nbuf,n) \
- + do { \
- + if ( nbuf < (size_t)(n) ) {\
- + DEBUGF("CHECKBUF NOT IMPLEMENTED!");\
- + break;\
- + } \
- + }while(0)
- +
- +
- +static void kf_bfly2(
- + kiss_fft_cpx * Fout,
- + const size_t fstride,
- + const kiss_fft_cfg st,
- + int m
- + )
- +{
- + kiss_fft_cpx * Fout2;
- + kiss_fft_cpx * tw1 = st->twiddles;
- + kiss_fft_cpx t;
- + Fout2 = Fout + m;
- + do{
- + C_FIXDIV(*Fout,2); C_FIXDIV(*Fout2,2);
- +
- + C_MUL (t, *Fout2 , *tw1);
- + tw1 += fstride;
- + C_SUB( *Fout2 , *Fout , t );
- + C_ADDTO( *Fout , t );
- + ++Fout2;
- + ++Fout;
- + }while (--m);
- +}
- +
- +static void kf_bfly4(
- + kiss_fft_cpx * Fout,
- + const size_t fstride,
- + const kiss_fft_cfg st,
- + const size_t m
- + )
- +{
- + kiss_fft_cpx *tw1,*tw2,*tw3;
- + kiss_fft_cpx scratch[6];
- + size_t k=m;
- + const size_t m2=2*m;
- + const size_t m3=3*m;
- +
- + tw3 = tw2 = tw1 = st->twiddles;
- +
- + do {
- + C_FIXDIV(*Fout,4); C_FIXDIV(Fout[m],4); C_FIXDIV(Fout[m2],4); C_FIXDIV(Fout[m3],4);
- +
- + C_MUL(scratch[0],Fout[m] , *tw1 );
- + C_MUL(scratch[1],Fout[m2] , *tw2 );
- + C_MUL(scratch[2],Fout[m3] , *tw3 );
- +
- + C_SUB( scratch[5] , *Fout, scratch[1] );
- + C_ADDTO(*Fout, scratch[1]);
- + C_ADD( scratch[3] , scratch[0] , scratch[2] );
- + C_SUB( scratch[4] , scratch[0] , scratch[2] );
- + C_SUB( Fout[m2], *Fout, scratch[3] );
- + tw1 += fstride;
- + tw2 += fstride*2;
- + tw3 += fstride*3;
- + C_ADDTO( *Fout , scratch[3] );
- +
- + if(st->inverse) {
- + Fout[m].r = scratch[5].r - scratch[4].i;
- + Fout[m].i = scratch[5].i + scratch[4].r;
- + Fout[m3].r = scratch[5].r + scratch[4].i;
- + Fout[m3].i = scratch[5].i - scratch[4].r;
- + }else{
- + Fout[m].r = scratch[5].r + scratch[4].i;
- + Fout[m].i = scratch[5].i - scratch[4].r;
- + Fout[m3].r = scratch[5].r - scratch[4].i;
- + Fout[m3].i = scratch[5].i + scratch[4].r;
- + }
- + ++Fout;
- + }while(--k);
- +}
- +
- +static void kf_bfly3(
- + kiss_fft_cpx * Fout,
- + const size_t fstride,
- + const kiss_fft_cfg st,
- + size_t m
- + )
- +{
- + size_t k=m;
- + const size_t m2 = 2*m;
- + kiss_fft_cpx *tw1,*tw2;
- + kiss_fft_cpx scratch[5];
- + kiss_fft_cpx epi3;
- + epi3 = st->twiddles[fstride*m];
- +
- + tw1=tw2=st->twiddles;
- +
- + do{
- + C_FIXDIV(*Fout,3); C_FIXDIV(Fout[m],3); C_FIXDIV(Fout[m2],3);
- +
- + C_MUL(scratch[1],Fout[m] , *tw1);
- + C_MUL(scratch[2],Fout[m2] , *tw2);
- +
- + C_ADD(scratch[3],scratch[1],scratch[2]);
- + C_SUB(scratch[0],scratch[1],scratch[2]);
- + tw1 += fstride;
- + tw2 += fstride*2;
- +
- + Fout[m].r = Fout->r - HALF_OF(scratch[3].r);
- + Fout[m].i = Fout->i - HALF_OF(scratch[3].i);
- +
- + C_MULBYSCALAR( scratch[0] , epi3.i );
- +
- + C_ADDTO(*Fout,scratch[3]);
- +
- + Fout[m2].r = Fout[m].r + scratch[0].i;
- + Fout[m2].i = Fout[m].i - scratch[0].r;
- +
- + Fout[m].r -= scratch[0].i;
- + Fout[m].i += scratch[0].r;
- +
- + ++Fout;
- + }while(--k);
- +}
- +
- +static void kf_bfly5(
- + kiss_fft_cpx * Fout,
- + const size_t fstride,
- + const kiss_fft_cfg st,
- + int m
- + )
- +{
- + kiss_fft_cpx *Fout0,*Fout1,*Fout2,*Fout3,*Fout4;
- + int u;
- + kiss_fft_cpx scratch[13];
- + kiss_fft_cpx * twiddles = st->twiddles;
- + kiss_fft_cpx *tw;
- + kiss_fft_cpx ya,yb;
- + ya = twiddles[fstride*m];
- + yb = twiddles[fstride*2*m];
- +
- + Fout0=Fout;
- + Fout1=Fout0+m;
- + Fout2=Fout0+2*m;
- + Fout3=Fout0+3*m;
- + Fout4=Fout0+4*m;
- +
- + tw=st->twiddles;
- + for ( u=0; u<m; ++u ) {
- + C_FIXDIV( *Fout0,5); C_FIXDIV( *Fout1,5); C_FIXDIV( *Fout2,5); C_FIXDIV( *Fout3,5); C_FIXDIV( *Fout4,5);
- + scratch[0] = *Fout0;
- +
- + C_MUL(scratch[1] ,*Fout1, tw[u*fstride]);
- + C_MUL(scratch[2] ,*Fout2, tw[2*u*fstride]);
- + C_MUL(scratch[3] ,*Fout3, tw[3*u*fstride]);
- + C_MUL(scratch[4] ,*Fout4, tw[4*u*fstride]);
- +
- + C_ADD( scratch[7],scratch[1],scratch[4]);
- + C_SUB( scratch[10],scratch[1],scratch[4]);
- + C_ADD( scratch[8],scratch[2],scratch[3]);
- + C_SUB( scratch[9],scratch[2],scratch[3]);
- +
- + Fout0->r += scratch[7].r + scratch[8].r;
- + Fout0->i += scratch[7].i + scratch[8].i;
- +
- + scratch[5].r = scratch[0].r + S_MUL(scratch[7].r,ya.r) + S_MUL(scratch[8].r,yb.r);
- + scratch[5].i = scratch[0].i + S_MUL(scratch[7].i,ya.r) + S_MUL(scratch[8].i,yb.r);
- +
- + scratch[6].r = S_MUL(scratch[10].i,ya.i) + S_MUL(scratch[9].i,yb.i);
- + scratch[6].i = -S_MUL(scratch[10].r,ya.i) - S_MUL(scratch[9].r,yb.i);
- +
- + C_SUB(*Fout1,scratch[5],scratch[6]);
- + C_ADD(*Fout4,scratch[5],scratch[6]);
- +
- + scratch[11].r = scratch[0].r + S_MUL(scratch[7].r,yb.r) + S_MUL(scratch[8].r,ya.r);
- + scratch[11].i = scratch[0].i + S_MUL(scratch[7].i,yb.r) + S_MUL(scratch[8].i,ya.r);
- + scratch[12].r = - S_MUL(scratch[10].i,yb.i) + S_MUL(scratch[9].i,ya.i);
- + scratch[12].i = S_MUL(scratch[10].r,yb.i) - S_MUL(scratch[9].r,ya.i);
- +
- + C_ADD(*Fout2,scratch[11],scratch[12]);
- + C_SUB(*Fout3,scratch[11],scratch[12]);
- +
- + ++Fout0;++Fout1;++Fout2;++Fout3;++Fout4;
- + }
- +}
- +
- +/* perform the butterfly for one stage of a mixed radix FFT */
- +static void kf_bfly_generic(
- + kiss_fft_cpx * Fout,
- + const size_t fstride,
- + const kiss_fft_cfg st,
- + int m,
- + int p
- + )
- +{
- + int u,k,q1,q;
- + kiss_fft_cpx * twiddles = st->twiddles;
- + kiss_fft_cpx t;
- + int Norig = st->nfft;
- +
- + CHECKBUF(scratchbuf,nscratchbuf,p);
- +
- + for ( u=0; u<m; ++u ) {
- + k=u;
- + for ( q1=0 ; q1<p ; ++q1 ) {
- + scratchbuf[q1] = Fout[ k ];
- + C_FIXDIV(scratchbuf[q1],p);
- + k += m;
- + }
- +
- + k=u;
- + for ( q1=0 ; q1<p ; ++q1 ) {
- + int twidx=0;
- + Fout[ k ] = scratchbuf[0];
- + for (q=1;q<p;++q ) {
- + twidx += fstride * k;
- + if (twidx>=Norig) twidx-=Norig;
- + C_MUL(t,scratchbuf[q] , twiddles[twidx] );
- + C_ADDTO( Fout[ k ] ,t);
- + }
- + k += m;
- + }
- + }
- +}
- +
- +static
- +void kf_work(
- + kiss_fft_cpx * Fout,
- + const kiss_fft_cpx * f,
- + const size_t fstride,
- + int in_stride,
- + int * factors,
- + const kiss_fft_cfg st
- + )
- +{
- + kiss_fft_cpx * Fout_beg=Fout;
- + const int p=*factors++; /* the radix */
- + const int m=*factors++; /* stage's fft length/p */
- + const kiss_fft_cpx * Fout_end = Fout + p*m;
- +
- +#ifdef _OPENMP
- + // use openmp extensions at the
- + // top-level (not recursive)
- + if (fstride==1) {
- + int k;
- +
- + // execute the p different work units in different threads
- +# pragma omp parallel for
- + for (k=0;k<p;++k)
- + kf_work( Fout +k*m, f+ fstride*in_stride*k,fstride*p,in_stride,factors,st);
- + // all threads have joined by this point
- +
- + switch (p) {
- + case 2: kf_bfly2(Fout,fstride,st,m); break;
- + case 3: kf_bfly3(Fout,fstride,st,m); break;
- + case 4: kf_bfly4(Fout,fstride,st,m); break;
- + case 5: kf_bfly5(Fout,fstride,st,m); break;
- + default: kf_bfly_generic(Fout,fstride,st,m,p); break;
- + }
- + return;
- + }
- +#endif
- +
- + if (m==1) {
- + do{
- + *Fout = *f;
- + f += fstride*in_stride;
- + }while(++Fout != Fout_end );
- + }else{
- + do{
- + // recursive call:
- + // DFT of size m*p performed by doing
- + // p instances of smaller DFTs of size m,
- + // each one takes a decimated version of the input
- + kf_work( Fout , f, fstride*p, in_stride, factors,st);
- + f += fstride*in_stride;
- + }while( (Fout += m) != Fout_end );
- + }
- +
- + Fout=Fout_beg;
- +
- + // recombine the p smaller DFTs
- + switch (p) {
- + case 2: kf_bfly2(Fout,fstride,st,m); break;
- + case 3: kf_bfly3(Fout,fstride,st,m); break;
- + case 4: kf_bfly4(Fout,fstride,st,m); break;
- + case 5: kf_bfly5(Fout,fstride,st,m); break;
- + default: kf_bfly_generic(Fout,fstride,st,m,p); break;
- + }
- +}
- +
- +/* facbuf is populated by p1,m1,p2,m2, ...
- + where
- + p[i] * m[i] = m[i-1]
- + m0 = n */
- +static
- +void kf_factor(int n,int * facbuf)
- +{
- + int p=4;
- + int32_t floor_sqrt = fsqrt(n, 15) >> 15;
- +
- + /*factor out powers of 4, powers of 2, then any remaining primes */
- + do {
- + while (n % p) {
- + switch (p) {
- + case 4: p = 2; break;
- + case 2: p = 3; break;
- + default: p += 2; break;
- + }
- + if (p > floor_sqrt)
- + p = n; /* no more factors, skip to end */
- + }
- + n /= p;
- + *facbuf++ = p;
- + *facbuf++ = n;
- + } while (n > 1);
- +}
- +
- +/*
- + *
- + * User-callable function to allocate all necessary storage space for the fft.
- + *
- + * The return value is a contiguous block of memory, allocated with malloc. As such,
- + * It can be freed with free(), rather than a kiss_fft-specific function.
- + * */
- +kiss_fft_cfg kiss_fft_alloc(int nfft,int inverse_fft,void * mem,size_t * lenmem )
- +{
- + kiss_fft_cfg st=NULL;
- + size_t memneeded = sizeof(struct kiss_fft_state)
- + + sizeof(kiss_fft_cpx)*(nfft-1); /* twiddle factors*/
- +
- + if ( lenmem==NULL ) {
- + DEBUGF("This version of kiss fft can't use malloc");
- + return st;
- + /* st = ( kiss_fft_cfg)KISS_FFT_MALLOC( memneeded ); */
- + }else{
- + if (mem != NULL && *lenmem >= memneeded)
- + st = (kiss_fft_cfg)mem;
- + *lenmem = memneeded;
- + }
- + if (st) {
- + int i;
- + st->nfft=nfft;
- + st->inverse = inverse_fft;
- +
- + for (i=0;i<nfft;++i) {
- + /* const double pi=3.141592653589793238462643383279502884197169399375105820974944;
- + double phase = -2*pi*i / nfft; */
- + if (st->inverse)
- + DEBUGF("Inverse FFT not implemented!"); /* kf_cexp(st->twiddles+i, -1*i, nfft ); */
- + else
- + kf_cexp( st->twiddles+i, i, nfft );
- + }
- +
- + kf_factor(nfft,st->factors);
- + }
- + return st;
- +}
- +
- +
- +
- +
- +void kiss_fft_stride(kiss_fft_cfg st,const kiss_fft_cpx *fin,kiss_fft_cpx *fout,int in_stride)
- +{
- + if (fin == fout) {
- + CHECKBUF(tmpbuf,ntmpbuf,st->nfft);
- + kf_work(tmpbuf,fin,1,in_stride, st->factors,st);
- + memcpy(fout,tmpbuf,sizeof(kiss_fft_cpx)*st->nfft);
- + }else{
- + kf_work( fout, fin, 1,in_stride, st->factors,st );
- + }
- +}
- +
- +void kiss_fft(kiss_fft_cfg cfg,const kiss_fft_cpx *fin,kiss_fft_cpx *fout)
- +{
- + kiss_fft_stride(cfg,fin,fout,1);
- +}
- +
- +
- +/* not really necessary to call, but if someone is doing in-place ffts, they may want to free the
- + buffers from CHECKBUF
- + */
- +void kiss_fft_cleanup(void)
- +{
- + /* free(scratchbuf); */
- + scratchbuf = NULL;
- + nscratchbuf=0;
- + /* free(tmpbuf); */
- + tmpbuf=NULL;
- + ntmpbuf=0;
- +}
- +
- +int kiss_fft_next_fast_size(int n)
- +{
- + while(1) {
- + int m=n;
- + while ( (m%2) == 0 ) m/=2;
- + while ( (m%3) == 0 ) m/=3;
- + while ( (m%5) == 0 ) m/=5;
- + if (m<=1)
- + break; /* n is completely factorable by twos, threes, and fives */
- + n++;
- + }
- + return n;
- +}
- diff --git a/apps/plugins/fft/kiss_fft.h b/apps/plugins/fft/kiss_fft.h
- new file mode 100644
- index 0000000..35c8648
- --- /dev/null
- +++ b/apps/plugins/fft/kiss_fft.h
- @@ -0,0 +1,119 @@
- +#ifndef KISS_FFT_H
- +#define KISS_FFT_H
- +
- +#include <stdlib.h>
- +#include <stdio.h>
- +#include <math.h>
- +#include <string.h>
- +#include <malloc.h>
- +#include "plugin.h"
- +#include "lib/helper.h"
- +
- +#ifdef __cplusplus
- +extern "C" {
- +#endif
- +
- +/*
- + ATTENTION!
- + If you would like a :
- + -- a utility that will handle the caching of fft objects
- + -- real-only (no imaginary time component ) FFT
- + -- a multi-dimensional FFT
- + -- a command-line utility to perform ffts
- + -- a command-line utility to perform fast-convolution filtering
- +
- + Then see kfc.h kiss_fftr.h kiss_fftnd.h fftutil.c kiss_fastfir.c
- + in the tools/ directory.
- +*/
- +
- +#define KISS_FFT_MALLOC malloc
- +
- +
- +#ifdef FIXED_POINT
- +#include <inttypes.h>
- +# if (FIXED_POINT == 32)
- +# define kiss_fft_scalar int32_t
- +# else
- +# define kiss_fft_scalar int16_t
- +# endif
- +#else
- +# ifndef kiss_fft_scalar
- +/* default is float */
- +# define kiss_fft_scalar float
- +# endif
- +#endif
- +
- +typedef struct {
- + kiss_fft_scalar r;
- + kiss_fft_scalar i;
- +}kiss_fft_cpx;
- +
- +typedef struct kiss_fft_state* kiss_fft_cfg;
- +
- +/*
- + * kiss_fft_alloc
- + *
- + * Initialize a FFT (or IFFT) algorithm's cfg/state buffer.
- + *
- + * typical usage: kiss_fft_cfg mycfg=kiss_fft_alloc(1024,0,NULL,NULL);
- + *
- + * The return value from fft_alloc is a cfg buffer used internally
- + * by the fft routine or NULL.
- + *
- + * If lenmem is NULL, then kiss_fft_alloc will allocate a cfg buffer using malloc.
- + * The returned value should be free()d when done to avoid memory leaks.
- + *
- + * The state can be placed in a user supplied buffer 'mem':
- + * If lenmem is not NULL and mem is not NULL and *lenmem is large enough,
- + * then the function places the cfg in mem and the size used in *lenmem
- + * and returns mem.
- + *
- + * If lenmem is not NULL and ( mem is NULL or *lenmem is not large enough),
- + * then the function returns NULL and places the minimum cfg
- + * buffer size in *lenmem.
- + * */
- +
- +kiss_fft_cfg kiss_fft_alloc(int nfft,int inverse_fft,void * mem,size_t * lenmem);
- +
- +/*
- + * kiss_fft(cfg,in_out_buf)
- + *
- + * Perform an FFT on a complex input buffer.
- + * for a forward FFT,
- + * fin should be f[0] , f[1] , ... ,f[nfft-1]
- + * fout will be F[0] , F[1] , ... ,F[nfft-1]
- + * Note that each element is complex and can be accessed like
- + f[k].r and f[k].i
- + * */
- +void kiss_fft(kiss_fft_cfg cfg,const kiss_fft_cpx *fin,kiss_fft_cpx *fout);
- +
- +/*
- + A more generic version of the above function. It reads its input from every Nth sample.
- + * */
- +void kiss_fft_stride(kiss_fft_cfg cfg,const kiss_fft_cpx *fin,kiss_fft_cpx *fout,int fin_stride);
- +
- +/* If kiss_fft_alloc allocated a buffer, it is one contiguous
- + buffer and can be simply free()d when no longer needed*/
- +#define kiss_fft_free free
- +
- +/*
- + Cleans up some memory that gets managed internally. Not necessary to call, but it might clean up
- + your compiler output to call this before you exit.
- +*/
- +void kiss_fft_cleanup(void);
- +
- +
- +/*
- + * Returns the smallest integer k, such that k>=n and k has only "fast" factors (2,3,5)
- + */
- +int kiss_fft_next_fast_size(int n);
- +
- +/* for real ffts, we need an even size */
- +#define kiss_fftr_next_fast_size_real(n) \
- + (kiss_fft_next_fast_size( ((n)+1)>>1)<<1)
- +
- +#ifdef __cplusplus
- +}
- +#endif
- +
- +#endif
- diff --git a/apps/plugins/fft/math.c b/apps/plugins/fft/math.c
- new file mode 100644
- index 0000000..15e630e
- --- /dev/null
- +++ b/apps/plugins/fft/math.c
- @@ -0,0 +1,100 @@
- +/*
- + * math.c
- + *
- + * Created on: Apr 7, 2009
- + * Author: archivator
- + */
- +
- +#include "math.h"
- +int16_t ilog2(int16_t i)
- +/*
- + Computation of 2048 * log2 ( i / 2048 )
- + The admissible range for i is 1 <= i <=32767,
- + the range of the result is -22528 <= ilog2 <= 8192.
- + -32768 is returned for i <= 0.
- + The maximum difference from the exact real value is +- 0.65
- +
- + Author: Hugo Pfoertner, http://www.pfoertner.org/
- +
- + Version history:
- + 04.10.95 Check for emergency output corrected
- + 02.10.95 Initial version, redesigned bearing in mind all earlier
- + versions since 1985. Tables are now tuned for maximum accuracy.
- + */
- +{
- + /* Local variables */
- + int16_t j, v, s, d, n;
- + int32_t klong;
- +
- + /*
- + The entries of the tables were obtained by an optimization procedure,
- + which shifts the "exact" values by small amounts to minimize the
- + maximum difference between the exact real value and the integer results
- + over the 32 sub-intervals of the argument interval 16384 <= i <= 32767.
- + The starting values for the optimization are
- + logtab[i] = 32768 * log2 ( 1 + i/32 ), i=0,1,...,31 and
- + logdiv[i] = 16 * ( logtab[i+1] - logtab[i] )
- + */
- + static const int16_t logtab[32] = { 11, 1465, 2877, 4248, 5578, 6873, 8134,
- + 9362, 10559, 11726, 12865, 13977, 15064, 16127, 17166, 18182,
- + 19177, 20152, 21107, 22043, 22961, 23861, 24745, 25613, 26464,
- + 27301, 28123, 28931, 29726, 30507, 31276, 32033 };
- + static const int16_t logdiv[32] = { 23276, 22595, 21933, 21282, 20736, 20197,
- + 19654, 19166, 18696, 18230, 17809, 17397, 17007, 16627, 16269,
- + 15929, 15598, 15286, 14974, 14699, 14417, 14151, 13890, 13612,
- + 13399, 13156, 12942, 12729, 12502, 12291, 12104, 11897 };
- +
- + /* Emergency exit for illegal input */
- +
- + if (i <= 0)
- + return -32768;
- +
- + /*
- + Start search for matching decade beginning from the top of
- + the range, since this is the most probable case.
- + j is the result for i = integer powers of 2,
- + v lower bound of dual decade,
- + 2**s is the length of the intervals for linear interpolation
- + */
- +
- + j = 6144;
- + v = 16384;
- + s = 9;
- +
- + /* Loop over dual "decades" */
- +
- + while (i < v)
- + {
- + j -= 2048;
- + v = v >> 1;
- + s--;
- + } /* endwhile */
- +
- + /* Distance from lower bound of dual decade */
- + d = i - v;
- +
- + /* Check if interpolation is necessary */
- + if (s >= 0)
- + {
- + /* Determine interval n */
- + n = d >> s;
- +
- + /* Compute remaining distance in interval and scale back */
- + d -= (n << s) << (9 - s);
- +
- + /* Perform linear interpolation */
- + klong = logtab[n] + (d * logdiv[n] >> 13);
- +
- + }
- + else
- + {
- + /* No interpolation necessary, function value is in the table */
- + n = d << -s;
- + klong = logtab[n];
- +
- + } /* endif */
- +
- + /* Add contribution of dual decade and scaled interpolation result */
- + return (j + (klong >> 4));
- +
- +} /* End of function ilog2 */
- diff --git a/apps/plugins/fft/math.h b/apps/plugins/fft/math.h
- new file mode 100644
- index 0000000..e37807b
- --- /dev/null
- +++ b/apps/plugins/fft/math.h
- @@ -0,0 +1,21 @@
- +#ifndef __MATH_H_
- +#define __MATH_H_
- +
- +#include <inttypes.h>
- +#include <math.h>
- +#include "lib/fixedpoint.h"
- +
- +#define Q_MUL(a, b, bits) (( (int64_t) (a) * (int64_t) (b) ) >> (bits))
- +#define Q15_MUL(a, b) Q_MUL(a,b,15)
- +#define Q16_MUL(a, b) Q_MUL(a,b,16)
- +
- +#define Q_DIV(a, b, bits) ( (((int64_t) (a)) << (bits)) / (b) )
- +#define Q15_DIV(a, b) Q_DIV(a,b,15)
- +#define Q16_DIV(a, b) Q_DIV(a,b,16)
- +
- +#define float_q(a, bits) (int32_t)( ((float)(a)) *(1<<(bits)))
- +#define float_q15(a) float_q(a, 15)
- +#define float_q16(a) float_q(a, 16)
- +
- +short ilog2(short i);
- +#endif
- diff --git a/firmware/export/pcm.h b/firmware/export/pcm.h
- index 444e0c9..b9ad913 100644
- --- a/firmware/export/pcm.h
- +++ b/firmware/export/pcm.h
- @@ -75,6 +75,7 @@ void pcm_play_data(pcm_more_callback_type get_more,
- unsigned char* start, size_t size);
- void pcm_calculate_peaks(int *left, int *right);
- +const void* pcm_get_peak_buffer(int* count);
- size_t pcm_get_bytes_waiting(void);
- void pcm_play_stop(void);
- diff --git a/firmware/pcm.c b/firmware/pcm.c
- index bc7ec02..a4c3c94 100644
- --- a/firmware/pcm.c
- +++ b/firmware/pcm.c
- @@ -180,6 +180,11 @@ void pcm_calculate_peaks(int *left, int *right)
- *right = peaks[1];
- }
- +const void* pcm_get_peak_buffer(int * count)
- +{
- + return pcm_play_dma_get_peak_buffer(count);
- +}
- +
- /****************************************************************************
- * Functions that do not require targeted implementation but only a targeted
- * interface
advertising
Update the Post
Either update this post and resubmit it with changes, or make a new post.
You may also comment on this post.
Please note that information posted here will expire by default in one month. If you do not want it to expire, please set the expiry time above. If it is set to expire, web search engines will not be allowed to index it prior to it expiring. Items that are not marked to expire will be indexable by search engines. Be careful with your passwords. All illegal activities will be reported and any information will be handed over to the authorities, so be good.