summaryrefslogtreecommitdiffstats
path: root/apps/plugin.c
blob: 9a7a397beacd060293551a03abb27958863ef148 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2002 Björn Stenberg
 *
 * 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 <stdbool.h>
#include <string.h>
#include <stdio.h>
#include <atoi.h>
#include <timefuncs.h>
#include <ctype.h>
#include "debug.h"
#include "button.h"
#include "lcd.h"
#include "dir.h"
#include "file.h"
#include "kernel.h"
#include "sprintf.h"
#include "screens.h"
#include "misc.h"
#include "mas.h"
#include "plugin.h"
#include "lang.h"
#include "keyboard.h"
#include "mpeg.h"
#include "buffer.h"
#include "mp3_playback.h"
#include "backlight.h"
#include "ata.h"
#include "talk.h"
#include "mp3data.h"
#include "powermgmt.h"

#ifdef HAVE_LCD_BITMAP
#include "peakmeter.h"
#include "widgets.h"
#endif

#ifdef SIMULATOR
  #include <debug.h>
  #ifdef WIN32
    #include "plugin-win32.h"
  #else
    #include <dlfcn.h>
  #endif
  #define PREFIX(_x_) sim_ ## _x_
#else
#define PREFIX(_x_) _x_
#endif

#define PLUGIN_BUFFER_SIZE 0x8000

#ifdef SIMULATOR
static unsigned char pluginbuf[PLUGIN_BUFFER_SIZE];
#else
extern unsigned char pluginbuf[];
#include "bitswap.h"
#endif

static bool plugin_loaded = false;
static int  plugin_size = 0;
#ifndef SIMULATOR
static void (*pfn_timer)(void) = NULL; /* user timer handler */
#endif
static void (*pfn_tsr_exit)(void) = NULL; /* TSR exit callback */

static int plugin_test(int api_version, int model, int memsize);

static const struct plugin_api rockbox_api = {
    PLUGIN_API_VERSION,

    plugin_test,
    
    /* lcd */
    lcd_clear_display,
    lcd_puts,
    lcd_puts_scroll,
    lcd_stop_scroll,
    lcd_set_contrast,
#ifdef HAVE_LCD_CHARCELLS
    lcd_define_pattern,
    lcd_get_locked_pattern,
    lcd_unlock_pattern,
    lcd_putc,
    lcd_put_cursor,
    lcd_remove_cursor,
    lcd_icon,
#else
    lcd_putsxy,
    lcd_puts_style,
    lcd_bitmap,
    lcd_drawline,
    lcd_clearline,
    lcd_drawpixel,
    lcd_clearpixel,
    lcd_setfont,
    font_get,
    lcd_clearrect,
    lcd_fillrect,
    lcd_drawrect,
    lcd_invertrect,
    lcd_getstringsize,
    lcd_update,
    lcd_update_rect,
    scrollbar,
    checkbox,
    &lcd_framebuffer[0][0],
    lcd_blit,
#ifndef SIMULATOR
    lcd_roll,
#endif
#endif
    backlight_on,
    backlight_off,
    splash,

    /* button */
    button_get,
    button_get_w_tmo,
    button_status,
    button_clear_queue,

    /* file */
    (open_func)PREFIX(open),
    PREFIX(close),
    (read_func)read,
    lseek,
    (creat_func)PREFIX(creat),
    (write_func)write,
    PREFIX(remove),
    PREFIX(rename),
    ftruncate,
    PREFIX(filesize),
    fprintf,
    read_line,
    settings_parseline,
#ifndef SIMULATOR
    ata_sleep,
#endif

    /* dir */
    PREFIX(opendir),
    PREFIX(closedir),
    PREFIX(readdir),

    /* kernel */
    PREFIX(sleep),
    yield,
    usb_screen,
    &current_tick,
    default_event_handler,
    create_thread,
    remove_thread,
    reset_poweroff_timer,

    /* strings and memory */
    snprintf,
    strcpy,
    strncpy,
    strlen,
    strrchr,
    strcmp,
    strcasecmp,
    memset,
    memcpy,
#ifndef SIMULATOR
    _ctype_,
#endif
    atoi,

    /* sound */
    mpeg_sound_set,
#ifndef SIMULATOR
    mp3_play_data,
    mp3_play_pause,
    mp3_play_stop,
    mp3_is_playing,
    bitswap,
#endif
    
    /* playback control */
    mpeg_play,
    mpeg_stop,
    mpeg_pause,
    mpeg_resume,
    mpeg_next,
    mpeg_prev,
    mpeg_ff_rewind,
    mpeg_next_track,
    playlist_amount,
    mpeg_status,
    mpeg_has_changed_track,
    mpeg_current_track,

    /* MAS communication */
#ifndef SIMULATOR
    mas_readmem,
    mas_writemem,
    mas_readreg,
    mas_writereg,
#ifdef HAVE_MAS3587F
    mas_codec_writereg,
    mas_codec_readreg,
#endif
#endif

    /* misc */
    srand,
    rand,
    (qsort_func)qsort,
    kbd_input,
    get_time,
    set_time,
    plugin_get_buffer,
    plugin_get_mp3_buffer,
#ifndef SIMULATOR
    plugin_register_timer,
    plugin_unregister_timer,
#endif
    plugin_tsr,
#if defined(DEBUG) || defined(SIMULATOR)
    debugf,
#endif
    &global_settings,
    backlight_set_timeout,
    mp3info,
    count_mp3_frames,
    create_xing_header,
    battery_level,

    /* new stuff at the end, sort into place next time
       the API gets incompatible */

#ifdef HAVE_MAS3587F
    mpeg_set_pitch,

    peak_meter_scale_value,
    peak_meter_set_use_dbfs, 
    peak_meter_get_use_dbfs,
#endif
#ifdef HAVE_LCD_BITMAP
    lcd_puts_scroll_style,
#endif
    mpeg_flush_and_reload_tracks,
    strncasecmp,
    mpeg_get_file_pos,
    find_next_frame,
    mpeg_get_last_header,
#ifndef SIMULATOR
    system_memory_guard,
#endif
};

int plugin_load(const char* plugin, void* parameter)
{
    enum plugin_status (*plugin_start)(struct plugin_api* api, void* param);
    int rc;
    char buf[64];
#ifdef SIMULATOR
    void* pd;
    char path[256];
#else
    int fd;
#endif
#ifdef HAVE_LCD_BITMAP
    int xm,ym;
#endif

    if (pfn_tsr_exit != NULL) /* if we have a resident old plugin: */
    {
        pfn_tsr_exit(); /* force it to exit now */
        pfn_tsr_exit = NULL;
    }

#ifdef HAVE_LCD_BITMAP
    lcd_clear_display();
    xm = lcd_getxmargin();
    ym = lcd_getymargin();
    lcd_setmargins(0,0);
    lcd_update();
#else
    lcd_clear_display();
#endif
#ifdef SIMULATOR
    snprintf(path, sizeof path, "archos%s", plugin);

    pd = dlopen(path, RTLD_NOW);
    if (!pd) {
        snprintf(buf, sizeof buf, "Can't open %s", plugin);
        splash(HZ*2, true, buf);
        DEBUGF("dlopen(%s): %s\n",path,dlerror());
        dlclose(pd);
        return -1;
    }

    plugin_start = dlsym(pd, "plugin_start");
    if (!plugin_start) {
        plugin_start = dlsym(pd, "_plugin_start");
        if (!plugin_start) {
            splash(HZ*2, true, "Can't find entry point");
            dlclose(pd);
            return -1;
        }
    }
#else
    fd = open(plugin, O_RDONLY);
    if (fd < 0) {
        snprintf(buf, sizeof buf, str(LANG_PLUGIN_CANT_OPEN), plugin);
        splash(HZ*2, true, buf);
        return fd;
    }

    plugin_start = (void*)&pluginbuf;
    plugin_size = read(fd, plugin_start, PLUGIN_BUFFER_SIZE);
    close(fd);
    if (plugin_size < 0) {
        /* read error */
        snprintf(buf, sizeof buf, str(LANG_READ_FAILED), plugin);
        splash(HZ*2, true, buf);
        return -1;
    }
    if (plugin_size == 0) {
        /* loaded a 0-byte plugin, implying it's not for this model */
        splash(HZ*2, true, str(LANG_PLUGIN_WRONG_MODEL));
        return -1;
    }
#endif

    plugin_loaded = true;
    rc = plugin_start((struct plugin_api*) &rockbox_api, parameter);
    /* explicitly casting the pointer here to avoid touching every plugin. */

    button_clear_queue();
    
    plugin_loaded = false;

    switch (rc) {
        case PLUGIN_OK:
            break;

        case PLUGIN_USB_CONNECTED:
            return PLUGIN_USB_CONNECTED;

        case PLUGIN_WRONG_API_VERSION:
            splash(HZ*2, true, str(LANG_PLUGIN_WRONG_VERSION));
            break;

        case PLUGIN_WRONG_MODEL:
            splash(HZ*2, true, str(LANG_PLUGIN_WRONG_MODEL));
            break;

        default:
            splash(HZ*2, true, str(LANG_PLUGIN_ERROR));
            break;
    }

#ifdef SIMULATOR
    dlclose(pd);
#endif

#ifdef HAVE_LCD_BITMAP
    /* restore margins */
    lcd_setmargins(xm,ym);
#endif

    return PLUGIN_OK;
}

/* Returns a pointer to the portion of the plugin buffer that is not already
   being used.  If no plugin is loaded, returns the entire plugin buffer */
void* plugin_get_buffer(int* buffer_size)
{
    int buffer_pos;

    if (plugin_loaded)
    {
        if (plugin_size >= PLUGIN_BUFFER_SIZE)
            return NULL;
        
        *buffer_size = PLUGIN_BUFFER_SIZE-plugin_size;
        buffer_pos = plugin_size;
    }
    else
    {
        *buffer_size = PLUGIN_BUFFER_SIZE;
        buffer_pos = 0;
    }

    return &pluginbuf[buffer_pos];
}

/* Returns a pointer to the mp3 buffer. 
   Playback gets stopped, to avoid conflicts. */
void* plugin_get_mp3_buffer(int* buffer_size)
{
#ifdef SIMULATOR
    static unsigned char buf[1700*1024];
    *buffer_size = sizeof(buf);
    return buf;
#else
    mpeg_stop();
    talk_buffer_steal(); /* we use the mp3 buffer, need to tell */
    *buffer_size = mp3end - mp3buf;
    return mp3buf;
#endif 
}

#ifndef SIMULATOR
/* Register a periodic time callback, called every "cycles" CPU clocks. 
   Note that this function will be called in interrupt context! */ 
int plugin_register_timer(int cycles, int prio, void (*timer_callback)(void))
{
    int phi = 0; /* bits for the prescaler */
    int prescale = 1;

    while (cycles > 0x10000)
    {   /* work out the smallest prescaler that makes it fit */
        phi++;
        prescale *= 2;
        cycles /= 2;
    }

    if (prescale > 8 || cycles == 0 || prio < 1 || prio > 15)
        return 0; /* error, we can't do such period, bad argument */

    and_b(~0x10, &TSTR); /* Stop the timer 4 */
    and_b(~0x10, &TSNC); /* No synchronization */
    and_b(~0x10, &TMDR); /* Operate normally */

    pfn_timer = timer_callback; /* install 2nd level ISR */

    and_b(~0x01, &TSR4);
    TIER4 = 0xF9; /* Enable GRA match interrupt */

    GRA4 = (unsigned short)(cycles - 1);
    TCR4 = 0x20 | phi; /* clear at GRA match, set prescaler */
    IPRD = (IPRD & 0xFF0F) | prio << 4; /* interrupt priority */
    or_b(0x10, &TSTR); /* start timer 4 */

    return cycles * prescale; /* return the actual period, in CPU clocks */
}

/* disable the user timer */
void plugin_unregister_timer(void)
{
    and_b(~0x10, &TSTR); /* stop the timer 4 */
    IPRD = (IPRD & 0xFF0F); /* disable interrupt */
    pfn_timer = NULL;
}

/* interrupt handler for user timer */
#pragma interrupt
void IMIA4(void)
{
    if (pfn_timer != NULL)
        pfn_timer(); /* call the user timer function */
    and_b(~0x01, &TSR4); /* clear the interrupt */
}
#endif /* #ifndef SIMULATOR */

/* The plugin wants to stay resident after leaving its main function, e.g.
   runs from timer or own thread. The callback is registered to later 
   instruct it to free its resources before a new plugin gets loaded. */
void plugin_tsr(void (*exit_callback)(void))
{
    pfn_tsr_exit = exit_callback; /* remember the callback for later */
}


static int plugin_test(int api_version, int model, int memsize)
{
    if (api_version < PLUGIN_MIN_API_VERSION ||
        api_version > PLUGIN_API_VERSION)
        return PLUGIN_WRONG_API_VERSION;

    if (model != MODEL)
        return PLUGIN_WRONG_MODEL;

    if (memsize != MEM)
        return PLUGIN_WRONG_MODEL;
    
    return PLUGIN_OK;
}