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rockbox/apps/plugins/pictureflow.c

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2007 Jonas Hurrelmann (j@outpo.st)
* Copyright (C) 2007 Nicolas Pennequin
* Copyright (C) 2007 Ariya Hidayat (ariya@kde.org) (original Qt Version)
*
* Original code: http://code.google.com/p/pictureflow/
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "plugin.h"
#include "pluginlib_actions.h"
#include "helper.h"
#include "bmp.h"
#include "picture.h"
#include "pictureflow_logo.h"
#include "pictureflow_emptyslide.h"
PLUGIN_HEADER
/******************************* Globals ***********************************/
static struct plugin_api *rb; /* global api struct pointer */
const struct button_mapping *plugin_contexts[]
= {generic_actions, generic_directions};
#define NB_ACTION_CONTEXTS sizeof(plugin_contexts)/sizeof(plugin_contexts[0])
/* Key assignement */
#if (CONFIG_KEYPAD == IPOD_1G2G_PAD) \
|| (CONFIG_KEYPAD == IPOD_3G_PAD) \
|| (CONFIG_KEYPAD == IPOD_4G_PAD) \
|| (CONFIG_KEYPAD == SANSA_E200_PAD)
#define PICTUREFLOW_NEXT_ALBUM PLA_UP
#define PICTUREFLOW_NEXT_ALBUM_REPEAT PLA_UP_REPEAT
#define PICTUREFLOW_PREV_ALBUM PLA_DOWN
#define PICTUREFLOW_PREV_ALBUM_REPEAT PLA_DOWN_REPEAT
#else
#define PICTUREFLOW_NEXT_ALBUM PLA_RIGHT
#define PICTUREFLOW_NEXT_ALBUM_REPEAT PLA_RIGHT_REPEAT
#define PICTUREFLOW_PREV_ALBUM PLA_LEFT
#define PICTUREFLOW_PREV_ALBUM_REPEAT PLA_LEFT_REPEAT
#endif
#define PICTUREFLOW_MENU PLA_MENU
#define PICTUREFLOW_QUIT PLA_QUIT
#define PICTUREFLOW_SELECT_ALBUM PLA_FIRE
/* for fixed-point arithmetic, we need minimum 32-bit long
long long (64-bit) might be useful for multiplication and division */
#define PFreal long
#define PFREAL_SHIFT 10
#define PFREAL_FACTOR (1 << PFREAL_SHIFT)
#define PFREAL_ONE (1 << PFREAL_SHIFT)
#define PFREAL_HALF (PFREAL_ONE >> 1)
#define IANGLE_MAX 1024
#define IANGLE_MASK 1023
/* maximum size of an slide */
#define MAX_IMG_WIDTH LCD_WIDTH
#define MAX_IMG_HEIGHT LCD_HEIGHT
#if (LCD_HEIGHT < 100)
#define PREFERRED_IMG_WIDTH 50
#define PREFERRED_IMG_HEIGHT 50
#else
#define PREFERRED_IMG_WIDTH 100
#define PREFERRED_IMG_HEIGHT 100
#endif
#define BUFFER_WIDTH LCD_WIDTH
#define BUFFER_HEIGHT LCD_HEIGHT
#define SLIDE_CACHE_SIZE 100
#define MAX_SLIDES_COUNT 10
#define SPACING_BETWEEN_SLIDE 40
#define EXTRA_SPACING_FOR_CENTER_SLIDE 0
#define THREAD_STACK_SIZE DEFAULT_STACK_SIZE + 0x200
#define CACHE_PREFIX PLUGIN_DEMOS_DIR "/pictureflow"
#define EV_EXIT 9999
#define EV_WAKEUP 1337
/* maximum number of albums */
#define MAX_ALBUMS 1024
#define AVG_ALBUM_NAME_LENGTH 20
#define UNIQBUF_SIZE (64*1024)
#define EMPTY_SLIDE CACHE_PREFIX "/emptyslide.pfraw"
#define CONFIG_FILE CACHE_PREFIX "/pictureflow.config"
/* Error return values */
#define ERROR_NO_ALBUMS -1
#define ERROR_BUFFER_FULL -2
/** structs we use */
struct slide_data {
int slide_index;
int angle;
PFreal cx;
PFreal cy;
};
struct slide_cache {
int index; /* index of the cached slide */
int hid; /* handle ID of the cached slide */
long touched; /* last time the slide was touched */
};
struct album_data {
int name_idx;
long seek;
};
struct rect {
int left;
int right;
int top;
int bottom;
};
struct load_slide_event_data {
int slide_index;
int cache_index;
};
struct pfraw_header {
int32_t width; /* bmap width in pixels */
int32_t height; /* bmap height in pixels */
};
const struct picture logos[]={
{pictureflow_logo, BMPWIDTH_pictureflow_logo, BMPHEIGHT_pictureflow_logo},
};
struct config_data {
long avg_album_width;
int spacing_between_slides;
int extra_spacing_for_center_slide;
int show_slides;
};
/** below we allocate the memory we want to use **/
static fb_data *buffer; /* for now it always points to the lcd framebuffer */
static PFreal rays[BUFFER_WIDTH];
static bool animation_is_active; /* an animation is currently running */
static struct slide_data center_slide;
static struct slide_data left_slides[MAX_SLIDES_COUNT];
static struct slide_data right_slides[MAX_SLIDES_COUNT];
static int slide_frame;
static int step;
static int target;
static int fade;
static int center_index; /* index of the slide that is in the center */
static int itilt;
static int zoom;
static PFreal offsetX;
static PFreal offsetY;
static bool show_fps; /* show fps in the main screen */
static int number_of_slides;
static struct slide_cache cache[SLIDE_CACHE_SIZE];
static int slide_cache_in_use;
/* use long for aligning */
unsigned long thread_stack[THREAD_STACK_SIZE / sizeof(long)];
static int slide_cache_stack[SLIDE_CACHE_SIZE]; /* queue (as array) for scheduling load_surface */
static int slide_cache_stack_index;
struct mutex slide_cache_stack_lock;
static int empty_slide_hid;
struct thread_entry *thread_id;
struct event_queue thread_q;
static char tmp_path_name[MAX_PATH];
static long uniqbuf[UNIQBUF_SIZE];
static struct tagcache_search tcs;
static struct album_data album[MAX_ALBUMS];
static char album_names[MAX_ALBUMS*AVG_ALBUM_NAME_LENGTH];
static int album_count;
static fb_data *input_bmp_buffer;
static fb_data *output_bmp_buffer;
static int input_hid;
static int output_hid;
static struct config_data config;
static bool thread_is_running;
PFreal sinTable[] = { /* 10 */
3, 9, 15, 21, 28, 34, 40, 47,
53, 59, 65, 72, 78, 84, 90, 97,
103, 109, 115, 122, 128, 134, 140, 147,
153, 159, 165, 171, 178, 184, 190, 196,
202, 209, 215, 221, 227, 233, 239, 245,
251, 257, 264, 270, 276, 282, 288, 294,
300, 306, 312, 318, 324, 330, 336, 342,
347, 353, 359, 365, 371, 377, 383, 388,
394, 400, 406, 412, 417, 423, 429, 434,
440, 446, 451, 457, 463, 468, 474, 479,
485, 491, 496, 501, 507, 512, 518, 523,
529, 534, 539, 545, 550, 555, 561, 566,
571, 576, 581, 587, 592, 597, 602, 607,
612, 617, 622, 627, 632, 637, 642, 647,
652, 656, 661, 666, 671, 675, 680, 685,
690, 694, 699, 703, 708, 712, 717, 721,
726, 730, 735, 739, 743, 748, 752, 756,
760, 765, 769, 773, 777, 781, 785, 789,
793, 797, 801, 805, 809, 813, 816, 820,
824, 828, 831, 835, 839, 842, 846, 849,
853, 856, 860, 863, 866, 870, 873, 876,
879, 883, 886, 889, 892, 895, 898, 901,
904, 907, 910, 913, 916, 918, 921, 924,
927, 929, 932, 934, 937, 939, 942, 944,
947, 949, 951, 954, 956, 958, 960, 963,
965, 967, 969, 971, 973, 975, 977, 978,
980, 982, 984, 986, 987, 989, 990, 992,
994, 995, 997, 998, 999, 1001, 1002, 1003,
1004, 1006, 1007, 1008, 1009, 1010, 1011, 1012,
1013, 1014, 1015, 1015, 1016, 1017, 1018, 1018,
1019, 1019, 1020, 1020, 1021, 1021, 1022, 1022,
1022, 1023, 1023, 1023, 1023, 1023, 1023, 1023,
1023, 1023, 1023, 1023, 1023, 1023, 1023, 1022,
1022, 1022, 1021, 1021, 1020, 1020, 1019, 1019,
1018, 1018, 1017, 1016, 1015, 1015, 1014, 1013,
1012, 1011, 1010, 1009, 1008, 1007, 1006, 1004,
1003, 1002, 1001, 999, 998, 997, 995, 994,
992, 990, 989, 987, 986, 984, 982, 980,
978, 977, 975, 973, 971, 969, 967, 965,
963, 960, 958, 956, 954, 951, 949, 947,
944, 942, 939, 937, 934, 932, 929, 927,
924, 921, 918, 916, 913, 910, 907, 904,
901, 898, 895, 892, 889, 886, 883, 879,
876, 873, 870, 866, 863, 860, 856, 853,
849, 846, 842, 839, 835, 831, 828, 824,
820, 816, 813, 809, 805, 801, 797, 793,
789, 785, 781, 777, 773, 769, 765, 760,
756, 752, 748, 743, 739, 735, 730, 726,
721, 717, 712, 708, 703, 699, 694, 690,
685, 680, 675, 671, 666, 661, 656, 652,
647, 642, 637, 632, 627, 622, 617, 612,
607, 602, 597, 592, 587, 581, 576, 571,
566, 561, 555, 550, 545, 539, 534, 529,
523, 518, 512, 507, 501, 496, 491, 485,
479, 474, 468, 463, 457, 451, 446, 440,
434, 429, 423, 417, 412, 406, 400, 394,
388, 383, 377, 371, 365, 359, 353, 347,
342, 336, 330, 324, 318, 312, 306, 300,
294, 288, 282, 276, 270, 264, 257, 251,
245, 239, 233, 227, 221, 215, 209, 202,
196, 190, 184, 178, 171, 165, 159, 153,
147, 140, 134, 128, 122, 115, 109, 103,
97, 90, 84, 78, 72, 65, 59, 53,
47, 40, 34, 28, 21, 15, 9, 3,
-4, -10, -16, -22, -29, -35, -41, -48,
-54, -60, -66, -73, -79, -85, -91, -98,
-104, -110, -116, -123, -129, -135, -141, -148,
-154, -160, -166, -172, -179, -185, -191, -197,
-203, -210, -216, -222, -228, -234, -240, -246,
-252, -258, -265, -271, -277, -283, -289, -295,
-301, -307, -313, -319, -325, -331, -337, -343,
-348, -354, -360, -366, -372, -378, -384, -389,
-395, -401, -407, -413, -418, -424, -430, -435,
-441, -447, -452, -458, -464, -469, -475, -480,
-486, -492, -497, -502, -508, -513, -519, -524,
-530, -535, -540, -546, -551, -556, -562, -567,
-572, -577, -582, -588, -593, -598, -603, -608,
-613, -618, -623, -628, -633, -638, -643, -648,
-653, -657, -662, -667, -672, -676, -681, -686,
-691, -695, -700, -704, -709, -713, -718, -722,
-727, -731, -736, -740, -744, -749, -753, -757,
-761, -766, -770, -774, -778, -782, -786, -790,
-794, -798, -802, -806, -810, -814, -817, -821,
-825, -829, -832, -836, -840, -843, -847, -850,
-854, -857, -861, -864, -867, -871, -874, -877,
-880, -884, -887, -890, -893, -896, -899, -902,
-905, -908, -911, -914, -917, -919, -922, -925,
-928, -930, -933, -935, -938, -940, -943, -945,
-948, -950, -952, -955, -957, -959, -961, -964,
-966, -968, -970, -972, -974, -976, -978, -979,
-981, -983, -985, -987, -988, -990, -991, -993,
-995, -996, -998, -999, -1000, -1002, -1003, -1004,
-1005, -1007, -1008, -1009, -1010, -1011, -1012, -1013,
-1014, -1015, -1016, -1016, -1017, -1018, -1019, -1019,
-1020, -1020, -1021, -1021, -1022, -1022, -1023, -1023,
-1023, -1024, -1024, -1024, -1024, -1024, -1024, -1024,
-1024, -1024, -1024, -1024, -1024, -1024, -1024, -1023,
-1023, -1023, -1022, -1022, -1021, -1021, -1020, -1020,
-1019, -1019, -1018, -1017, -1016, -1016, -1015, -1014,
-1013, -1012, -1011, -1010, -1009, -1008, -1007, -1005,
-1004, -1003, -1002, -1000, -999, -998, -996, -995,
-993, -991, -990, -988, -987, -985, -983, -981,
-979, -978, -976, -974, -972, -970, -968, -966,
-964, -961, -959, -957, -955, -952, -950, -948,
-945, -943, -940, -938, -935, -933, -930, -928,
-925, -922, -919, -917, -914, -911, -908, -905,
-902, -899, -896, -893, -890, -887, -884, -880,
-877, -874, -871, -867, -864, -861, -857, -854,
-850, -847, -843, -840, -836, -832, -829, -825,
-821, -817, -814, -810, -806, -802, -798, -794,
-790, -786, -782, -778, -774, -770, -766, -761,
-757, -753, -749, -744, -740, -736, -731, -727,
-722, -718, -713, -709, -704, -700, -695, -691,
-686, -681, -676, -672, -667, -662, -657, -653,
-648, -643, -638, -633, -628, -623, -618, -613,
-608, -603, -598, -593, -588, -582, -577, -572,
-567, -562, -556, -551, -546, -540, -535, -530,
-524, -519, -513, -508, -502, -497, -492, -486,
-480, -475, -469, -464, -458, -452, -447, -441,
-435, -430, -424, -418, -413, -407, -401, -395,
-389, -384, -378, -372, -366, -360, -354, -348,
-343, -337, -331, -325, -319, -313, -307, -301,
-295, -289, -283, -277, -271, -265, -258, -252,
-246, -240, -234, -228, -222, -216, -210, -203,
-197, -191, -185, -179, -172, -166, -160, -154,
-148, -141, -135, -129, -123, -116, -110, -104,
-98, -91, -85, -79, -73, -66, -60, -54,
-48, -41, -35, -29, -22, -16, -10, -4,
};
/** code */
bool create_bmp(struct bitmap* input_bmp, char *target_path, bool resize);
int load_surface(int);
/* There are some precision issues when not using (long long) which in turn
takes very long to compute... I guess the best solution would be to optimize
the computations so it only requires a single long */
static inline PFreal fmul(PFreal a, PFreal b)
{
return ((long long) (a)) * ((long long) (b)) >> PFREAL_SHIFT;
}
static inline PFreal fdiv(PFreal num, PFreal den)
{
long long p = (long long) (num) << (PFREAL_SHIFT * 2);
long long q = p / (long long) den;
long long r = q >> PFREAL_SHIFT;
return r;
}
#define fmin(a,b) (((a) < (b)) ? (a) : (b))
#define fmax(a,b) (((a) > (b)) ? (a) : (b))
#define fbound(min,val,max) (fmax((min),fmin((max),(val))))
#if 0
#define fmul(a,b) ( ((a)*(b)) >> PFREAL_SHIFT )
#define fdiv(n,m) ( ((n)<< PFREAL_SHIFT ) / m )
#define fconv(a, q1, q2) (((q2)>(q1)) ? (a)<<((q2)-(q1)) : (a)>>((q1)-(q2)))
#define tofloat(a, q) ( (float)(a) / (float)(1<<(q)) )
static inline PFreal fmul(PFreal a, PFreal b)
{
return (a*b) >> PFREAL_SHIFT;
}
static inline PFreal fdiv(PFreal n, PFreal m)
{
return (n<<(PFREAL_SHIFT))/m;
}
#endif
inline PFreal fsin(int iangle)
{
while (iangle < 0)
iangle += IANGLE_MAX;
return sinTable[iangle & IANGLE_MASK];
}
inline PFreal fcos(int iangle)
{
/* quarter phase shift */
return fsin(iangle + (IANGLE_MAX >> 2));
}
/**
Create an index of all albums from the database.
Also store the album names so we can access them later.
*/
int create_album_index(void)
{
rb->memset(&tcs, 0, sizeof(struct tagcache_search) );
album_count = 0;
rb->tagcache_search(&tcs, tag_album);
rb->tagcache_search_set_uniqbuf(&tcs, uniqbuf, UNIQBUF_SIZE);
int l, old_l = 0;
album[0].name_idx = 0;
while (rb->tagcache_get_next(&tcs) && album_count < MAX_ALBUMS)
{
l = rb->strlen(tcs.result) + 1;
if ( album_count > 0 )
album[album_count].name_idx = album[album_count-1].name_idx + old_l;
if ( (album[album_count].name_idx + l) > MAX_ALBUMS*AVG_ALBUM_NAME_LENGTH )
/* not enough memory */
return ERROR_BUFFER_FULL;
rb->strcpy(album_names + album[album_count].name_idx, tcs.result);
album[album_count].seek = tcs.result_seek;
old_l = l;
album_count++;
}
rb->tagcache_search_finish(&tcs);
return (album_count > 0) ? 0 : ERROR_NO_ALBUMS;
}
/**
Return a pointer to the album name of the given slide_index
*/
char* get_album_name(int slide_index)
{
return album_names + album[slide_index].name_idx;
}
/**
Determine filename of the album art for the given slide_index and
store the result in buf.
The algorithm looks for the first track of the given album uses
find_albumart to find the filename.
*/
bool get_albumart_for_index_from_db(int slide_index, char *buf, int buflen)
{
if ( slide_index == -1 )
{
rb->strncpy( buf, EMPTY_SLIDE, buflen );
}
if (!rb->tagcache_search(&tcs, tag_filename))
return false;
bool result;
/* find the first track of the album */
rb->tagcache_search_add_filter(&tcs, tag_album, album[slide_index].seek);
if ( rb->tagcache_get_next(&tcs) ) {
struct mp3entry id3;
char size[9];
rb->snprintf(size, sizeof(size), ".%dx%d", PREFERRED_IMG_WIDTH, PREFERRED_IMG_HEIGHT);
rb->strncpy( (char*)&id3.path, tcs.result, MAX_PATH );
id3.album = get_album_name(slide_index);
if ( rb->search_albumart_files(&id3, size, buf, buflen) )
result = true;
else if ( rb->search_albumart_files(&id3, "", buf, buflen) )
result = true;
else
result = false;
}
else {
/* did not find a matching track */
result = false;
}
rb->tagcache_search_finish(&tcs);
return result;
}
/**
Draw the PictureFlow logo
*/
void draw_splashscreen(void)
{
struct screen* display = rb->screens[0];
rb->lcd_set_background(LCD_RGBPACK(0,0,0));
rb->lcd_set_foreground(LCD_RGBPACK(255,255,255));
rb->lcd_clear_display();
const struct picture* logo = &(logos[display->screen_type]);
picture_draw(display, logo, (LCD_WIDTH - logo->width) / 2, 10);
rb->lcd_update();
}
/**
Draw a simple progress bar
*/
void draw_progressbar(int step)
{
int txt_w, txt_h;
const int bar_height = 22;
const int w = LCD_WIDTH - 20;
const int x = 10;
rb->lcd_getstringsize("Preparing album artwork", &txt_w, &txt_h);
int y = (LCD_HEIGHT - txt_h)/2;
rb->lcd_putsxy((LCD_WIDTH - txt_w)/2, y, "Preparing album artwork");
y += (txt_h + 5);
rb->lcd_set_foreground(LCD_RGBPACK(100,100,100));
rb->lcd_drawrect(x, y, w+2, bar_height);
rb->lcd_set_foreground(LCD_RGBPACK(165, 231, 82));
rb->lcd_fillrect(x+1, y+1, step * w / album_count, bar_height-2);
rb->lcd_set_foreground(LCD_RGBPACK(255,255,255));
rb->lcd_update();
rb->yield();
}
bool allocate_buffers(void)
{
int input_size = MAX_IMG_WIDTH * MAX_IMG_HEIGHT * sizeof( fb_data );
int output_size = MAX_IMG_WIDTH * MAX_IMG_HEIGHT * sizeof( fb_data ) * 2;
input_hid = rb->bufalloc(NULL, input_size, TYPE_BITMAP);
if (input_hid < 0)
return false;
if (rb->bufgetdata(input_hid, 0, (void *)&input_bmp_buffer) < input_size) {
rb->bufclose(input_hid);
return false;
}
output_hid = rb->bufalloc(NULL, output_size, TYPE_BITMAP);
if (output_hid < 0) {
rb->bufclose(input_hid);
return false;
}
if (rb->bufgetdata(output_hid, 0, (void *)&output_bmp_buffer) < output_size) {
rb->bufclose(output_hid);
return false;
}
return true;
}
bool free_buffers(void)
{
rb->bufclose(input_hid);
rb->bufclose(output_hid);
return true;
}
/**
Precomupte the album art images and store them in CACHE_PREFIX.
*/
bool create_albumart_cache(bool force)
{
number_of_slides = album_count;
int fh,ret;
if ( ! force && rb->file_exists( CACHE_PREFIX "/ready" ) ) return true;
int i, slides = 0;
struct bitmap input_bmp;
for (i=0; i < album_count; i++)
{
draw_progressbar(i);
if (!get_albumart_for_index_from_db(i, tmp_path_name, MAX_PATH))
continue;
input_bmp.data = (char *)input_bmp_buffer;
ret = rb->read_bmp_file(tmp_path_name, &input_bmp,
sizeof(fb_data)*MAX_IMG_WIDTH*MAX_IMG_HEIGHT,
FORMAT_NATIVE);
if (ret <= 0) {
rb->splash(HZ, "couldn't read bmp");
continue; /* skip missing/broken files */
}
rb->snprintf(tmp_path_name, sizeof(tmp_path_name), CACHE_PREFIX "/%d.pfraw", i);
if (!create_bmp(&input_bmp, tmp_path_name, false)) {
rb->splash(HZ, "couldn't write bmp");
}
config.avg_album_width += input_bmp.width;
slides++;
if ( rb->button_get(false) == PICTUREFLOW_MENU ) return false;
}
config.avg_album_width /= slides;
if ( config.avg_album_width == 0 ) {
rb->splash(HZ, "album size is 0");
return false;
}
fh = rb->creat( CACHE_PREFIX "/ready" );
rb->close(fh);
return true;
}
/**
Return the index on the stack of slide_index.
Return -1 if slide_index is not on the stack.
*/
int slide_stack_get_index(int slide_index)
{
int i = slide_cache_stack_index + 1;
while (i--) {
if ( slide_cache_stack[i] == slide_index ) return i;
};
return -1;
}
/**
Push the slide_index on the stack so the image will be loaded.
The algorithm tries to keep the center_index on top and the
slide_index as high as possible (so second if center_index is
on the stack).
*/
void slide_stack_push(int slide_index)
{
rb->mutex_lock(&slide_cache_stack_lock);
if ( slide_cache_stack_index == -1 ) {
/* empty stack, no checks at all */
slide_cache_stack[ ++slide_cache_stack_index ] = slide_index;
rb->mutex_unlock(&slide_cache_stack_lock);
return;
}
int i = slide_stack_get_index( slide_index );
if ( i == slide_cache_stack_index ) {
/* slide_index is on top, so we do not change anything */
rb->mutex_unlock(&slide_cache_stack_lock);
return;
}
if ( i >= 0 ) {
/* slide_index is already on the stack, but not on top */
int tmp = slide_cache_stack[ slide_cache_stack_index ];
if ( tmp == center_index ) {
/* the center_index is on top of the stack so do not touch that */
if ( slide_cache_stack_index > 0 ) {
/* but maybe it is possible to swap the given slide_index to the second place */
tmp = slide_cache_stack[ slide_cache_stack_index -1 ];
slide_cache_stack[ slide_cache_stack_index - 1 ] = slide_cache_stack[ i ];
slide_cache_stack[ i ] = tmp;
}
}
else {
/* if the center_index is not on top (i.e. already loaded) bring the slide_index to the top */
slide_cache_stack[ slide_cache_stack_index ] = slide_cache_stack[ i ];
slide_cache_stack[ i ] = tmp;
}
}
else {
/* slide_index is not on the stack */
if ( slide_cache_stack_index >= SLIDE_CACHE_SIZE-1 ) {
/* if we exceeded the stack size, clear the first half of the stack */
slide_cache_stack_index = SLIDE_CACHE_SIZE/2;
for (i = 0; i <= slide_cache_stack_index ; i++)
slide_cache_stack[ i ] = slide_cache_stack[ i + slide_cache_stack_index ];
}
if ( slide_cache_stack[ slide_cache_stack_index ] == center_index ) {
/* if the center_index is on top leave it there */
slide_cache_stack[ slide_cache_stack_index ] = slide_index;
slide_cache_stack[ ++slide_cache_stack_index ] = center_index;
}
else {
/* usual stack case: push the slide_index on top */
slide_cache_stack[ ++slide_cache_stack_index ] = slide_index;
}
}
rb->mutex_unlock(&slide_cache_stack_lock);
}
/**
Pop the topmost item from the stack and decrease the stack size
*/
inline int slide_stack_pop(void)
{
rb->mutex_lock(&slide_cache_stack_lock);
int result;
if ( slide_cache_stack_index >= 0 )
result = slide_cache_stack[ slide_cache_stack_index-- ];
else
result = -1;
rb->mutex_unlock(&slide_cache_stack_lock);
return result;
}
/**
Load the slide into the cache.
Thus we have to queue the loading request in our thread while discarding the oldest slide.
*/
void request_surface(int slide_index)
{
slide_stack_push(slide_index);
rb->queue_post(&thread_q, EV_WAKEUP, 0);
}
/**
Thread used for loading and preparing bitmaps in the background
*/
void thread(void)
{
long sleep_time = 5 * HZ;
struct queue_event ev;
while (1) {
rb->queue_wait_w_tmo(&thread_q, &ev, sleep_time);
switch (ev.id) {
case EV_EXIT:
return;
case EV_WAKEUP:
/* we just woke up */
break;
}
int slide_index;
while ( (slide_index = slide_stack_pop()) != -1 ) {
load_surface( slide_index );
rb->queue_wait_w_tmo(&thread_q, &ev, HZ/10);
switch (ev.id) {
case EV_EXIT:
return;
}
}
}
}
/**
End the thread by posting the EV_EXIT event
*/
void end_pf_thread(void)
{
if ( thread_is_running ) {
rb->queue_post(&thread_q, EV_EXIT, 0);
rb->thread_wait(thread_id);
/* remove the thread's queue from the broadcast list */
rb->queue_delete(&thread_q);
thread_is_running = false;
}
}
/**
Create the thread an setup the event queue
*/
bool create_pf_thread(void)
{
rb->queue_init(&thread_q, true); /* put the thread's queue in the bcast list */
if ((thread_id = rb->create_thread(
thread,
thread_stack,
sizeof(thread_stack),
0,
"Picture load thread"
IF_PRIO(, PRIORITY_BACKGROUND)
IF_COP(, CPU)
)
) == NULL) {
return false;
}
thread_is_running = true;
return true;
}
/**
Safe the given bitmap as filename in the pfraw format
*/
bool save_pfraw(char* filename, struct bitmap *bm)
{
struct pfraw_header bmph;
bmph.width = bm->width;
bmph.height = bm->height;
int fh = rb->creat( filename );
if( fh < 0 ) return false;
rb->write( fh, &bmph, sizeof( struct pfraw_header ) );
int y;
for( y = 0; y < bm->height; y++ )
{
fb_data *d = (fb_data*)( bm->data ) + (y*bm->width);
rb->write( fh, d, sizeof( fb_data ) * bm->width );
}
rb->close( fh );
return true;
}
/**
Read the pfraw image given as filename and return the hid of the buffer
*/
int read_pfraw(char* filename)
{
struct pfraw_header bmph;
int fh = rb->open(filename, O_RDONLY);
rb->read(fh, &bmph, sizeof(struct pfraw_header));
if( fh < 0 ) {
return empty_slide_hid;
}
int size = sizeof(struct bitmap) + sizeof( fb_data ) * bmph.width * bmph.height;
int hid = rb->bufalloc(NULL, size, TYPE_BITMAP);
if (hid < 0) {
rb->close( fh );
return -1;
}
struct bitmap *bm;
if (rb->bufgetdata(hid, 0, (void *)&bm) < size) {
rb->close( fh );
return -1;
}
bm->width = bmph.width;
bm->height = bmph.height;
bm->format = FORMAT_NATIVE;
bm->data = ((unsigned char *)bm + sizeof(struct bitmap));
int y;
for( y = 0; y < bm->height; y++ )
{
fb_data *d = (fb_data*)( bm->data ) + (y*bm->width);
rb->read( fh, d , sizeof( fb_data ) * bm->width );
}
rb->close( fh );
return hid;
}
/**
Create the slide with its reflection for the given slide_index and filename
and store it as pfraw in CACHE_PREFIX/[slide_index].pfraw
*/
bool create_bmp(struct bitmap *input_bmp, char *target_path, bool resize)
{
struct bitmap output_bmp;
output_bmp.format = input_bmp->format;
output_bmp.data = (char *)output_bmp_buffer;
if ( resize ) {
/* resize image */
output_bmp.width = config.avg_album_width;
output_bmp.height = config.avg_album_width;
simple_resize_bitmap(input_bmp, &output_bmp);
/* Resized bitmap is now in the output buffer,
copy it back to the input buffer */
rb->memcpy(input_bmp_buffer, output_bmp_buffer,
config.avg_album_width * config.avg_album_width * sizeof(fb_data));
input_bmp->data = (char *)input_bmp_buffer;
input_bmp->width = output_bmp.width;
input_bmp->height = output_bmp.height;
}
output_bmp.width = input_bmp->width * 2;
output_bmp.height = input_bmp->height;
fb_data *src = (fb_data *)input_bmp->data;
fb_data *dst = (fb_data *)output_bmp.data;
/* transpose the image, this is to speed-up the rendering
because we process one column at a time
(and much better and faster to work row-wise, i.e in one scanline) */
int hofs = input_bmp->width / 3;
rb->memset(dst, 0, sizeof(fb_data) * output_bmp.width * output_bmp.height);
int x, y;
for (x = 0; x < input_bmp->width; x++)
for (y = 0; y < input_bmp->height; y++)
dst[output_bmp.width * x + (hofs + y)] =
src[y * input_bmp->width + x];
/* create the reflection */
int ht = input_bmp->height - hofs;
int hte = ht;
for (x = 0; x < input_bmp->width; x++) {
for (y = 0; y < ht; y++) {
fb_data color = src[x + input_bmp->width * (input_bmp->height - y - 1)];
int r = RGB_UNPACK_RED(color) * (hte - y) / hte * 3 / 5;
int g = RGB_UNPACK_GREEN(color) * (hte - y) / hte * 3 / 5;
int b = RGB_UNPACK_BLUE(color) * (hte - y) / hte * 3 / 5;
dst[output_bmp.height + hofs + y + output_bmp.width * x] =
LCD_RGBPACK(r, g, b);
}
}
return save_pfraw(target_path, &output_bmp);
}
/**
Load the surface for the given slide_index into the cache at cache_index.
*/
static bool load_and_prepare_surface(int slide_index, int cache_index)
{
rb->snprintf(tmp_path_name, sizeof(tmp_path_name), CACHE_PREFIX "/%d.pfraw", slide_index);
int hid = read_pfraw(tmp_path_name);
if (hid < 0)
return false;
cache[cache_index].hid = hid;
if ( cache_index < SLIDE_CACHE_SIZE ) {
cache[cache_index].index = slide_index;
cache[cache_index].touched = *rb->current_tick;
}
return true;
}
/**
Load the surface from a bmp and overwrite the oldest slide in the cache
if necessary.
*/
int load_surface(int slide_index)
{
long oldest_tick = *rb->current_tick;
int oldest_slide = 0;
int i;
if ( slide_cache_in_use < SLIDE_CACHE_SIZE ) { /* initial fill */
oldest_slide = slide_cache_in_use;
load_and_prepare_surface(slide_index, slide_cache_in_use++);
}
else {
for (i = 0; i < SLIDE_CACHE_SIZE; i++) { /* look for oldest slide */
if (cache[i].touched < oldest_tick) {
oldest_slide = i;
oldest_tick = cache[i].touched;
}
}
if (cache[oldest_slide].hid != empty_slide_hid) {
rb->bufclose(cache[oldest_slide].hid);
cache[oldest_slide].hid = -1;
}
load_and_prepare_surface(slide_index, oldest_slide);
}
return oldest_slide;
}
/**
Get a slide from the buffer
*/
struct bitmap *get_slide(int hid)
{
if (hid < 0)
return NULL;
struct bitmap *bmp;
ssize_t ret = rb->bufgetdata(hid, 0, (void *)&bmp);
if (ret < 0)
return NULL;
return bmp;
}
/**
Return the requested surface
*/
struct bitmap *surface(int slide_index)
{
if (slide_index < 0)
return 0;
if (slide_index >= number_of_slides)
return 0;
int i;
for (i = 0; i < slide_cache_in_use; i++) { /* maybe do the inverse mapping => implies dynamic allocation? */
if ( cache[i].index == slide_index ) {
/* We have already loaded our slide, so touch it and return it. */
cache[i].touched = *rb->current_tick;
return get_slide(cache[i].hid);
}
}
request_surface(slide_index);
return get_slide(empty_slide_hid);
}
/**
adjust slides so that they are in "steady state" position
*/
void reset_slides(void)
{
center_slide.angle = 0;
center_slide.cx = 0;
center_slide.cy = 0;
center_slide.slide_index = center_index;
int i;
for (i = 0; i < config.show_slides; i++) {
struct slide_data *si = &left_slides[i];
si->angle = itilt;
si->cx = -(offsetX + config.spacing_between_slides * i * PFREAL_ONE);
si->cy = offsetY;
si->slide_index = center_index - 1 - i;
}
for (i = 0; i < config.show_slides; i++) {
struct slide_data *si = &right_slides[i];
si->angle = -itilt;
si->cx = offsetX + config.spacing_between_slides * i * PFREAL_ONE;
si->cy = offsetY;
si->slide_index = center_index + 1 + i;
}
}
/**
Updates look-up table and other stuff necessary for the rendering.
Call this when the viewport size or slide dimension is changed.
*/
void recalc_table(void)
{
int w = (BUFFER_WIDTH + 1) / 2;
int h = (BUFFER_HEIGHT + 1) / 2;
int i;
for (i = 0; i < w; i++) {
PFreal gg = (PFREAL_HALF + i * PFREAL_ONE) / (2 * h);
rays[w - i - 1] = -gg;
rays[w + i] = gg;
}
itilt = 70 * IANGLE_MAX / 360; /* approx. 70 degrees tilted */
offsetX = config.avg_album_width / 2 * (PFREAL_ONE - fcos(itilt));
offsetY = config.avg_album_width / 2 * fsin(itilt);
offsetX += config.avg_album_width * PFREAL_ONE;
offsetY += config.avg_album_width * PFREAL_ONE / 4;
offsetX += config.extra_spacing_for_center_slide << PFREAL_SHIFT;
}
/**
Render a single slide
*/
void render_slide(struct slide_data *slide, struct rect *result_rect,
int alpha, int col1, int col2)
{
rb->memset(result_rect, 0, sizeof(struct rect));
struct bitmap *bmp = surface(slide->slide_index);
if (!bmp) {
return;
}
fb_data *src = (fb_data *)bmp->data;
int sw = bmp->height;
int sh = bmp->width;
int h = LCD_HEIGHT;
int w = LCD_WIDTH;
if (col1 > col2) {
int c = col2;
col2 = col1;
col1 = c;
}
col1 = (col1 >= 0) ? col1 : 0;
col2 = (col2 >= 0) ? col2 : w - 1;
col1 = fmin(col1, w - 1);
col2 = fmin(col2, w - 1);
int distance = h * 100 / zoom;
PFreal sdx = fcos(slide->angle);
PFreal sdy = fsin(slide->angle);
PFreal xs = slide->cx - bmp->width * sdx / 4;
PFreal ys = slide->cy - bmp->width * sdy / 4;
PFreal dist = distance * PFREAL_ONE;
int xi = fmax((PFreal) 0,
((w * PFREAL_ONE / 2) +
fdiv(xs * h, dist + ys)) >> PFREAL_SHIFT);
if (xi >= w) {
return;
}
bool flag = false;
result_rect->left = xi;
int x;
for (x = fmax(xi, col1); x <= col2; x++) {
PFreal hity = 0;
PFreal fk = rays[x];
if (sdy) {
fk = fk - fdiv(sdx, sdy);
hity = -fdiv(( rays[x] * distance
- slide->cx
+ slide->cy * sdx / sdy), fk);
}
dist = distance * PFREAL_ONE + hity;
if (dist < 0)
continue;
PFreal hitx = fmul(dist, rays[x]);
PFreal hitdist = fdiv(hitx - slide->cx, sdx);
int column = sw / 2 + (hitdist >> PFREAL_SHIFT);
if (column >= sw)
break;
if (column < 0)
continue;
result_rect->right = x;
if (!flag)
result_rect->left = x;
flag = true;
int y1 = h / 2;
int y2 = y1 + 1;
fb_data *pixel1 = &buffer[y1 * BUFFER_WIDTH + x];
fb_data *pixel2 = &buffer[y2 * BUFFER_WIDTH + x];
int pixelstep = pixel2 - pixel1;
int center = (sh / 2);
int dy = dist / h;
int p1 = center * PFREAL_ONE - dy / 2;
int p2 = center * PFREAL_ONE + dy / 2;
const fb_data *ptr = &src[column * bmp->width];
if (alpha == 256)
while ((y1 >= 0) && (y2 < h) && (p1 >= 0)) {
*pixel1 = ptr[p1 >> PFREAL_SHIFT];
*pixel2 = ptr[p2 >> PFREAL_SHIFT];
p1 -= dy;
p2 += dy;
y1--;
y2++;
pixel1 -= pixelstep;
pixel2 += pixelstep;
} else
while ((y1 >= 0) && (y2 < h) && (p1 >= 0)) {
fb_data c1 = ptr[p1 >> PFREAL_SHIFT];
fb_data c2 = ptr[p2 >> PFREAL_SHIFT];
int r1 = RGB_UNPACK_RED(c1) * alpha / 256;
int g1 = RGB_UNPACK_GREEN(c1) * alpha / 256;
int b1 = RGB_UNPACK_BLUE(c1) * alpha / 256;
int r2 = RGB_UNPACK_RED(c2) * alpha / 256;
int g2 = RGB_UNPACK_GREEN(c2) * alpha / 256;
int b2 = RGB_UNPACK_BLUE(c2) * alpha / 256;
*pixel1 = LCD_RGBPACK(r1, g1, b1);
*pixel2 = LCD_RGBPACK(r2, g2, b2);
p1 -= dy;
p2 += dy;
y1--;
y2++;
pixel1 -= pixelstep;
pixel2 += pixelstep;
}
}
/* let the music play... */
rb->yield();
result_rect->top = 0;
result_rect->bottom = h - 1;
return;
}
/**
Jump the the given slide_index
*/
static inline void set_current_slide(int slide_index)
{
step = 0;
center_index = fbound(slide_index, 0, number_of_slides - 1);
target = center_index;
slide_frame = slide_index << 16;
reset_slides();
}
/**
Start the animation for changing slides
*/
void start_animation(void)
{
if (!animation_is_active) {
step = (target < center_slide.slide_index) ? -1 : 1;
animation_is_active = true;
}
}
/**
Go to the previous slide
*/
void show_previous_slide(void)
{
if (step >= 0) {
if (center_index > 0) {
target = center_index - 1;
start_animation();
}
} else {
target = fmax(0, center_index - 2);
}
}
/**
Go to the next slide
*/
void show_next_slide(void)
{
if (step <= 0) {
if (center_index < number_of_slides - 1) {
target = center_index + 1;
start_animation();
}
} else {
target = fmin(center_index + 2, number_of_slides - 1);
}
}
/**
Return true if the rect has size 0
*/
bool is_empty_rect(struct rect *r)
{
return ((r->left == 0) && (r->right == 0) && (r->top == 0)
&& (r->bottom == 0));
}
/**
Render the slides. Updates only the offscreen buffer.
*/
void render(void)
{
rb->lcd_set_background(LCD_RGBPACK(0,0,0));
rb->lcd_clear_display(); /* TODO: Optimizes this by e.g. invalidating rects */
int nleft = config.show_slides;
int nright = config.show_slides;
struct rect r;
render_slide(&center_slide, &r, 256, -1, -1);
#ifdef DEBUG_DRAW
rb->lcd_drawrect(r.left, r.top, r.right - r.left, r.bottom - r.top);
#endif
int c1 = r.left;
int c2 = r.right;
int index;
if (step == 0) {
/* no animation, boring plain rendering */
for (index = 0; index < nleft - 1; index++) {
int alpha = (index < nleft - 2) ? 256 : 128;
render_slide(&left_slides[index], &r, alpha, 0, c1 - 1);
if (!is_empty_rect(&r)) {
#ifdef DEBUG_DRAW
rb->lcd_drawrect(r.left, r.top, r.right - r.left, r.bottom - r.top);
#endif
c1 = r.left;
}
}
for (index = 0; index < nright - 1; index++) {
int alpha = (index < nright - 2) ? 256 : 128;
render_slide(&right_slides[index], &r, alpha, c2 + 1,
BUFFER_WIDTH);
if (!is_empty_rect(&r)) {
#ifdef DEBUG_DRAW
rb->lcd_drawrect(r.left, r.top, r.right - r.left, r.bottom - r.top);
#endif
c2 = r.right;
}
}
} else {
if ( step < 0 ) c1 = BUFFER_WIDTH;
/* the first and last slide must fade in/fade out */
for (index = 0; index < nleft; index++) {
int alpha = 256;
if (index == nleft - 1)
alpha = (step > 0) ? 0 : 128 - fade / 2;
if (index == nleft - 2)
alpha = (step > 0) ? 128 - fade / 2 : 256 - fade / 2;
if (index == nleft - 3)
alpha = (step > 0) ? 256 - fade / 2 : 256;
render_slide(&left_slides[index], &r, alpha, 0, c1 - 1);
if (!is_empty_rect(&r)) {
#ifdef DEBUG_DRAW
rb->lcd_drawrect(r.left, r.top, r.right - r.left, r.bottom - r.top);
#endif
c1 = r.left;
}
}
if ( step > 0 ) c2 = 0;
for (index = 0; index < nright; index++) {
int alpha = (index < nright - 2) ? 256 : 128;
if (index == nright - 1)
alpha = (step > 0) ? fade / 2 : 0;
if (index == nright - 2)
alpha = (step > 0) ? 128 + fade / 2 : fade / 2;
if (index == nright - 3)
alpha = (step > 0) ? 256 : 128 + fade / 2;
render_slide(&right_slides[index], &r, alpha, c2 + 1,
BUFFER_WIDTH);
if (!is_empty_rect(&r)) {
#ifdef DEBUG_DRAW
rb->lcd_drawrect(r.left, r.top, r.right - r.left, r.bottom - r.top);
#endif
c2 = r.right;
}
}
}
}
/**
Updates the animation effect. Call this periodically from a timer.
*/
void update_animation(void)
{
if (!animation_is_active)
return;
if (step == 0)
return;
int speed = 16384;
int i;
/* deaccelerate when approaching the target */
if (true) {
const int max = 2 * 65536;
int fi = slide_frame;
fi -= (target << 16);
if (fi < 0)
fi = -fi;
fi = fmin(fi, max);
int ia = IANGLE_MAX * (fi - max / 2) / (max * 2);
speed = 512 + 16384 * (PFREAL_ONE + fsin(ia)) / PFREAL_ONE;
}
slide_frame += speed * step;
int index = slide_frame >> 16;
int pos = slide_frame & 0xffff;
int neg = 65536 - pos;
int tick = (step < 0) ? neg : pos;
PFreal ftick = (tick * PFREAL_ONE) >> 16;
/* the leftmost and rightmost slide must fade away */
fade = pos / 256;
if (step < 0)
index++;
if (center_index != index) {
center_index = index;
slide_frame = index << 16;
center_slide.slide_index = center_index;
for (i = 0; i < config.show_slides; i++)
left_slides[i].slide_index = center_index - 1 - i;
for (i = 0; i < config.show_slides; i++)
right_slides[i].slide_index = center_index + 1 + i;
}
center_slide.angle = (step * tick * itilt) >> 16;
center_slide.cx = -step * fmul(offsetX, ftick);
center_slide.cy = fmul(offsetY, ftick);
if (center_index == target) {
reset_slides();
animation_is_active = false;
step = 0;
fade = 256;
return;
}
for (i = 0; i < config.show_slides; i++) {
struct slide_data *si = &left_slides[i];
si->angle = itilt;
si->cx =
-(offsetX + config.spacing_between_slides * i * PFREAL_ONE + step * config.spacing_between_slides * ftick);
si->cy = offsetY;
}
for (i = 0; i < config.show_slides; i++) {
struct slide_data *si = &right_slides[i];
si->angle = -itilt;
si->cx =
offsetX + config.spacing_between_slides * i * PFREAL_ONE - step * config.spacing_between_slides * ftick;
si->cy = offsetY;
}
if (step > 0) {
PFreal ftick = (neg * PFREAL_ONE) >> 16;
right_slides[0].angle = -(neg * itilt) >> 16;
right_slides[0].cx = fmul(offsetX, ftick);
right_slides[0].cy = fmul(offsetY, ftick);
} else {
PFreal ftick = (pos * PFREAL_ONE) >> 16;
left_slides[0].angle = (pos * itilt) >> 16;
left_slides[0].cx = -fmul(offsetX, ftick);
left_slides[0].cy = fmul(offsetY, ftick);
}
/* must change direction ? */
if (target < index)
if (step > 0)
step = -1;
if (target > index)
if (step < 0)
step = 1;
}
/**
Cleanup the plugin
*/
void cleanup(void *parameter)
{
(void) parameter;
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
rb->cpu_boost(false);
#endif
/* Turn on backlight timeout (revert to settings) */
backlight_use_settings(rb); /* backlight control in lib/helper.c */
int i;
for (i = 0; i < slide_cache_in_use; i++) {
rb->bufclose(cache[i].hid);
}
if ( empty_slide_hid != - 1)
rb->bufclose(empty_slide_hid);
}
int create_empty_slide(bool force)
{
if ( force || ! rb->file_exists( EMPTY_SLIDE ) ) {
struct bitmap input_bmp;
input_bmp.width = BMPWIDTH_pictureflow_emptyslide;
input_bmp.height = BMPHEIGHT_pictureflow_emptyslide;
input_bmp.format = FORMAT_NATIVE;
input_bmp.data = (char*) &pictureflow_emptyslide;
if ( ! create_bmp(&input_bmp, EMPTY_SLIDE, true) ) return false;
}
empty_slide_hid = read_pfraw( EMPTY_SLIDE );
if (empty_slide_hid == -1 ) return false;
return true;
}
/**
Shows the settings menu
*/
int settings_menu(void) {
int selection = 0;
MENUITEM_STRINGLIST(settings_menu,"PictureFlow Settings",NULL,"Show FPS", "Spacing", "Center margin", "Number of slides", "Rebuild cache");
do {
selection=rb->do_menu(&settings_menu,&selection);
switch(selection) {
case 0:
rb->set_bool("Show FPS", &show_fps);
break;
case 1:
rb->set_int("Spacing between slides", "", 1, &(config.spacing_between_slides),
NULL, 1, 0, 100, NULL );
recalc_table();
reset_slides();
break;
case 2:
rb->set_int("Center margin", "", 1, &(config.extra_spacing_for_center_slide),
NULL, 1, -50, 50, NULL );
recalc_table();
reset_slides();
break;
case 3:
rb->set_int("Number of slides", "", 1, &(config.show_slides),
NULL, 1, 1, MAX_SLIDES_COUNT, NULL );
recalc_table();
reset_slides();
break;
case 4:
rb->remove(CACHE_PREFIX "/ready");
rb->remove(EMPTY_SLIDE);
rb->splash(HZ, "Cache will be rebuilt on next restart");
break;
case MENU_ATTACHED_USB:
return PLUGIN_USB_CONNECTED;
}
} while ( selection >= 0 );
return 0;
}
/**
Show the main menu
*/
int main_menu(void)
{
int selection = 0;
int result;
rb->lcd_set_foreground(LCD_RGBPACK(255,255,255));
MENUITEM_STRINGLIST(main_menu,"PictureFlow Main Menu",NULL,
"Settings", "Return", "Quit");
while (1) {
switch (rb->do_menu(&main_menu,&selection)) {
case 0:
result = settings_menu();
if ( result != 0 ) return result;
break;
case 1:
return 0;
case 2:
return -1;
case MENU_ATTACHED_USB:
return PLUGIN_USB_CONNECTED;
default:
return 0;
}
}
}
bool read_pfconfig(void)
{
/* defaults */
config.spacing_between_slides = 40;
config.extra_spacing_for_center_slide = 0;
config.show_slides = 3;
int fh = rb->open( CONFIG_FILE, O_RDONLY );
if ( fh < 0 ) { /* no config yet */
return true;
}
int ret = rb->read(fh, &config, sizeof(struct config_data));
rb->close(fh);
return ( ret == sizeof(struct config_data) );
}
bool write_pfconfig(void)
{
int fh = rb->creat( CONFIG_FILE );
if( fh < 0 ) return false;
rb->write( fh, &config, sizeof( struct config_data ) );
rb->close( fh );
return true;
}
/**
Main function that also contain the main plasma
algorithm.
*/
int main(void)
{
int ret;
draw_splashscreen();
if ( ! rb->dir_exists( CACHE_PREFIX ) ) {
if ( rb->mkdir( CACHE_PREFIX ) < 0 ) {
rb->splash(HZ, "Could not create directory");
return PLUGIN_ERROR;
}
}
if (!read_pfconfig()) {
rb->splash(HZ, "Error in config. Please delete " CONFIG_FILE);
return PLUGIN_ERROR;
}
if (!allocate_buffers()) {
rb->splash(HZ, "Could not allocate temporary buffers");
return PLUGIN_ERROR;
}
ret = create_album_index();
if (ret == ERROR_BUFFER_FULL) {
rb->splash(HZ, "Not enough memory for album names");
return PLUGIN_ERROR;
} else if (ret == ERROR_NO_ALBUMS) {
rb->splash(HZ, "No albums found. Please enable database");
return PLUGIN_ERROR;
}
if (!create_albumart_cache(config.avg_album_width == 0)) {
rb->splash(HZ, "Could not create album art cache");
return PLUGIN_ERROR;
}
if (!create_empty_slide(false)) {
rb->splash(HZ, "Could not load the empty slide");
return PLUGIN_ERROR;
}
if (!free_buffers()) {
rb->splash(HZ, "Could not free temporary buffers");
return PLUGIN_ERROR;
}
if (!create_pf_thread()) {
rb->splash(HZ, "Cannot create thread!");
return PLUGIN_ERROR;
}
int i;
/* initialize */
int min_slide_cache = fmin(number_of_slides, SLIDE_CACHE_SIZE);
for (i = 0; i < min_slide_cache; i++) {
cache[i].hid = -1;
cache[i].touched = 0;
slide_cache_stack[i] = SLIDE_CACHE_SIZE-i-1;
}
slide_cache_stack_index = min_slide_cache-1;
slide_cache_in_use = 0;
buffer = rb->lcd_framebuffer;
animation_is_active = false;
zoom = 100;
center_index = 0;
slide_frame = 0;
step = 0;
target = 0;
fade = 256;
show_fps = false;
recalc_table();
reset_slides();
char fpstxt[10];
char *albumtxt;
int button;
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
rb->cpu_boost(true);
#endif
int frames = 0;
long last_update = *rb->current_tick;
long current_update;
long update_interval = 100;
int fps = 0;
int albumtxt_w, albumtxt_h;
int albumtxt_x = 0, albumtxt_y = 0;
int albumtxt_dir = -1;
int c;
int prev_center_index = -1;
while (true) {
current_update = *rb->current_tick;
frames++;
update_animation();
render();
if (current_update - last_update > update_interval) {
fps = frames * HZ / (current_update - last_update);
last_update = current_update;
frames = 0;
}
if (show_fps) {
rb->lcd_set_foreground(LCD_RGBPACK(255, 0, 0));
rb->snprintf(fpstxt, sizeof(fpstxt), "FPS: %d", fps);
rb->lcd_putsxy(0, 0, fpstxt);
}
albumtxt = get_album_name(center_index);
if ( animation_is_active ) {
c = ((slide_frame & 0xffff )/ 256);
if (step > 0) c = 255-c;
}
else c= 255;
rb->lcd_set_foreground(LCD_RGBPACK(c,c,c));
rb->lcd_getstringsize(albumtxt, &albumtxt_w, &albumtxt_h);
if (center_index != prev_center_index) {
albumtxt_x = 0;
albumtxt_dir = -1;
albumtxt_y = LCD_HEIGHT-albumtxt_h-10;
prev_center_index = center_index;
}
if (albumtxt_w > LCD_WIDTH && ! animation_is_active ) {
rb->lcd_putsxy(albumtxt_x, albumtxt_y , albumtxt);
if ( albumtxt_w + albumtxt_x <= LCD_WIDTH ) albumtxt_dir = 1;
else if ( albumtxt_x >= 0 ) albumtxt_dir = -1;
albumtxt_x += albumtxt_dir;
}
else {
rb->lcd_putsxy((LCD_WIDTH - albumtxt_w) /2, albumtxt_y , albumtxt);
}
rb->lcd_update();
rb->yield();
button = pluginlib_getaction(rb, animation_is_active ? 0 : HZ/16,
plugin_contexts, NB_ACTION_CONTEXTS);
switch (button) {
case PICTUREFLOW_QUIT:
return PLUGIN_OK;
case PICTUREFLOW_MENU:
ret = main_menu();
if ( ret == -1 ) return PLUGIN_OK;
if ( ret != 0 ) return i;
break;
case PICTUREFLOW_NEXT_ALBUM:
case PICTUREFLOW_NEXT_ALBUM_REPEAT:
show_next_slide();
break;
case PICTUREFLOW_PREV_ALBUM:
case PICTUREFLOW_PREV_ALBUM_REPEAT:
show_previous_slide();
break;
default:
if (rb->default_event_handler_ex(button, cleanup, NULL)
== SYS_USB_CONNECTED)
return PLUGIN_USB_CONNECTED;
break;
}
}
}
/*************************** Plugin entry point ****************************/
enum plugin_status plugin_start(struct plugin_api *api, void *parameter)
{
int ret;
rb = api; /* copy to global api pointer */
(void) parameter;
#if LCD_DEPTH > 1
rb->lcd_set_backdrop(NULL);
#endif
/* Turn off backlight timeout */
backlight_force_on(rb); /* backlight control in lib/helper.c */
ret = main();
if ( ret == PLUGIN_OK ) {
if (!write_pfconfig()) {
rb->splash(HZ, "Error writing config.");
return PLUGIN_ERROR;
}
}
end_pf_thread();
cleanup(NULL);
return ret;
}
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