platform/linux/gp2x.c

   1 /* faking/emulating gp2x.c by using gtk */
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5 #include <pthread.h>
   6 #include <gtk/gtk.h>
   7
   8 #include <unistd.h>
   9 #include <sys/types.h>
  10 #include <sys/stat.h>
  11 #include <sys/ioctl.h>
  12 #include <sys/soundcard.h>
  13 #include <fcntl.h>
  14 #include <errno.h>
  15
  16 #include "../gp2x/emu.h"
  17 #include "../gp2x/gp2x.h"
  18 #include "../gp2x/usbjoy.h"
  19 #include "../gp2x/version.h"
  20
  21 #include "log_io.h"
  22
  23 void *gp2x_screen;
  24 static int current_bpp = 8;
  25 static int current_pal[256];
  26 static unsigned long current_keys = 0;
  27 static int sounddev = 0, mixerdev = 0;
  28 static const char *verstring = "PicoDrive " VERSION;
  29
  30 // dummies
  31 char *ext_menu = 0, *ext_state = 0;
  32
  33 /* gtk */
  34 struct gtk_global_struct
  35 {
  36         GtkWidget *window;
  37         GtkWidget *pixmap1;
  38 } gtk_items;
  39
  40
  41 static gboolean delete_event (GtkWidget *widget, GdkEvent *event, gpointer data)
  42 {
  43         return FALSE;
  44 }
  45
  46 static void destroy (GtkWidget *widget, gpointer data)
  47 {
  48         gtk_main_quit ();
  49 }
  50
  51 static gint key_press_event (GtkWidget *widget, GdkEventKey *event)
  52 {
  53         switch (event->hardware_keycode)
  54         {
  55                 case 0x62: current_keys |= GP2X_UP;    break;
  56                 case 0x68: current_keys |= GP2X_DOWN;  break;
  57                 case 0x64: current_keys |= GP2X_LEFT;  break;
  58                 case 0x66: current_keys |= GP2X_RIGHT; break;
  59                 case 0x24: current_keys |= GP2X_START; break; // enter
  60                 case 0x23: current_keys |= GP2X_SELECT;break; // ]
  61                 case 0x34: current_keys |= GP2X_A;     break; // z
  62                 case 0x35: current_keys |= GP2X_X;     break; // x
  63                 case 0x36: current_keys |= GP2X_B;     break; // c
  64                 case 0x37: current_keys |= GP2X_Y;     break; // v
  65                 case 0x27: current_keys |= GP2X_L;     break; // s
  66                 case 0x28: current_keys |= GP2X_R;     break; // d
  67                 case 0x29: current_keys |= GP2X_PUSH;  break; // f
  68                 case 0x18: current_keys |= GP2X_VOL_DOWN;break; // q
  69                 case 0x19: current_keys |= GP2X_VOL_UP;break; // w
  70                 case 0x2d: log_io_clear(); break; // k
  71                 case 0x2e: log_io_dump();  break; // l
  72         }
  73
  74         return 0;
  75 }
  76
  77 static gint key_release_event (GtkWidget *widget, GdkEventKey *event)
  78 {
  79         switch (event->hardware_keycode)
  80         {
  81                 case 0x62: current_keys &= ~GP2X_UP;    break;
  82                 case 0x68: current_keys &= ~GP2X_DOWN;  break;
  83                 case 0x64: current_keys &= ~GP2X_LEFT;  break;
  84                 case 0x66: current_keys &= ~GP2X_RIGHT; break;
  85                 case 0x24: current_keys &= ~GP2X_START; break; // enter
  86                 case 0x23: current_keys &= ~GP2X_SELECT;break; // ]
  87                 case 0x34: current_keys &= ~GP2X_A;     break; // z
  88                 case 0x35: current_keys &= ~GP2X_X;     break; // x
  89                 case 0x36: current_keys &= ~GP2X_B;     break; // c
  90                 case 0x37: current_keys &= ~GP2X_Y;     break; // v
  91                 case 0x27: current_keys &= ~GP2X_L;     break; // s
  92                 case 0x28: current_keys &= ~GP2X_R;     break; // d
  93                 case 0x29: current_keys &= ~GP2X_PUSH;  break; // f
  94                 case 0x18: current_keys &= ~GP2X_VOL_DOWN;break; // q
  95                 case 0x19: current_keys &= ~GP2X_VOL_UP;break; // w
  96         }
  97
  98         return 0;
  99 }
 100
 101 static void *gtk_threadf(void *none)
 102 {
 103         gtk_main();
 104
 105         printf("linux: gtk thread finishing\n");
 106         engineState = PGS_Quit;
 107
 108         return NULL;
 109 }
 110
 111 static void gtk_initf(void)
 112 {
 113         int argc = 0;
 114         char *argv[] = { "" };
 115         GtkWidget *box;
 116         pthread_t gtk_thread;
 117
 118         g_thread_init (NULL);
 119         gdk_threads_init ();
 120         gdk_set_locale ();
 121         gtk_init (&argc, (char ***) &argv);
 122
 123         /* create new window */
 124         gtk_items.window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
 125         g_signal_connect (G_OBJECT (gtk_items.window), "delete_event",
 126                         G_CALLBACK (delete_event), NULL);
 127
 128         g_signal_connect (G_OBJECT (gtk_items.window), "destroy",
 129                         G_CALLBACK (destroy), NULL);
 130
 131         g_signal_connect (G_OBJECT (gtk_items.window), "key_press_event",
 132                         G_CALLBACK (key_press_event), NULL);
 133
 134         g_signal_connect (G_OBJECT (gtk_items.window), "key_release_event",
 135                         G_CALLBACK (key_release_event), NULL);
 136
 137         gtk_container_set_border_width (GTK_CONTAINER (gtk_items.window), 2);
 138         gtk_window_set_title ((GtkWindow *) gtk_items.window, verstring);
 139
 140         box = gtk_hbox_new(FALSE, 0);
 141         gtk_widget_show(box);
 142         gtk_container_add (GTK_CONTAINER (gtk_items.window), box);
 143
 144         /* live pixmap */
 145         gtk_items.pixmap1 = gtk_image_new ();
 146         gtk_container_add (GTK_CONTAINER (box), gtk_items.pixmap1);
 147         gtk_widget_show (gtk_items.pixmap1);
 148         gtk_widget_set_size_request (gtk_items.pixmap1, 320, 240);
 149
 150         gtk_widget_show  (gtk_items.window);
 151
 152         // pthread_mutex_init (&thr_mutex, NULL);
 153         // pthread_mutex_lock (&thr_mutex);
 154         // pthread_mutex_init (&scanner_muttex, NULL);
 155
 156         pthread_create(&gtk_thread, NULL, gtk_threadf, NULL);
 157 }
 158
 159 void finalize_image(guchar *pixels, gpointer data)
 160 {
 161         free(pixels);
 162 }
 163
 164 /* --- */
 165
 166 void gp2x_init(void)
 167 {
 168         printf("entering init()\n"); fflush(stdout);
 169
 170         gp2x_screen = malloc(320*240*2 + 320*2);
 171         memset(gp2x_screen, 0, 320*240*2 + 320*2);
 172
 173         // snd
 174         mixerdev = open("/dev/mixer", O_RDWR);
 175         if (mixerdev == -1)
 176                 printf("open(\"/dev/mixer\") failed with %i\n", errno);
 177
 178         gtk_initf();
 179
 180         gp2x_usbjoy_init();
 181
 182         printf("exitting init()\n"); fflush(stdout);
 183 }
 184
 185 void gp2x_deinit(void)
 186 {
 187         free(gp2x_screen);
 188         if (sounddev > 0) close(sounddev);
 189         close(mixerdev);
 190         gp2x_usbjoy_deinit();
 191 }
 192
 193 /* video */
 194 void gp2x_video_flip(void)
 195 {
 196         GdkPixbuf       *pixbuf;
 197         unsigned char   *image;
 198         int             i;
 199
 200         gdk_threads_enter();
 201
 202         image = malloc (320*240*3);
 203         if (image == NULL)
 204         {
 205                 gdk_threads_leave();
 206                 return;
 207         }
 208
 209         if (current_bpp == 8)
 210         {
 211                 unsigned char *pixels = gp2x_screen;
 212                 int pix;
 213
 214                 for (i = 0; i < 320*240; i++)
 215                 {
 216                         pix = current_pal[pixels[i]];
 217                         image[3 * i + 0] = pix >> 16;
 218                         image[3 * i + 1] = pix >>  8;
 219                         image[3 * i + 2] = pix;
 220                 }
 221         }
 222         else
 223         {
 224                 unsigned short *pixels = gp2x_screen;
 225
 226                 for (i = 0; i < 320*240; i++)
 227                 {
 228                         /*  in:           rrrr rggg gggb bbbb */
 229                         /* out: rrrr r000 gggg gg00 bbbb b000 */
 230                         image[3 * i + 0] = (pixels[i] >> 8) & 0xf8;
 231                         image[3 * i + 1] = (pixels[i] >> 3) & 0xfc;
 232                         image[3 * i + 2] = (pixels[i] << 3);
 233                 }
 234         }
 235
 236         pixbuf = gdk_pixbuf_new_from_data (image, GDK_COLORSPACE_RGB,
 237                         FALSE, 8, 320, 240, 320*3, finalize_image, NULL);
 238         gtk_image_set_from_pixbuf (GTK_IMAGE (gtk_items.pixmap1), pixbuf);
 239         g_object_unref (pixbuf);
 240
 241         gdk_threads_leave();
 242 }
 243
 244 void gp2x_video_flip2(void)
 245 {
 246         gp2x_video_flip();
 247 }
 248
 249 void gp2x_video_changemode(int bpp)
 250 {
 251         current_bpp = bpp;
 252 }
 253
 254 void gp2x_video_changemode2(int bpp)
 255 {
 256         current_bpp = bpp;
 257 }
 258
 259 void gp2x_video_setpalette(int *pal, int len)
 260 {
 261         memcpy(current_pal, pal, len*4);
 262 }
 263
 264 void gp2x_video_flush_cache(void)
 265 {
 266 }
 267
 268 void gp2x_video_RGB_setscaling(int v_offs, int W, int H)
 269 {
 270 }
 271
 272 void gp2x_memcpy_buffers(int buffers, void *data, int offset, int len)
 273 {
 274         if ((char *)gp2x_screen + offset != data)
 275                 memcpy((char *)gp2x_screen + offset, data, len);
 276 }
 277
 278 void gp2x_memcpy_all_buffers(void *data, int offset, int len)
 279 {
 280         memcpy((char *)gp2x_screen + offset, data, len);
 281 }
 282
 283
 284 void gp2x_memset_all_buffers(int offset, int byte, int len)
 285 {
 286         memset((char *)gp2x_screen + offset, byte, len);
 287 }
 288
 289 void gp2x_pd_clone_buffer2(void)
 290 {
 291         memset(gp2x_screen, 0, 320*240*2);
 292 }
 293
 294 /* sound */
 295 static int s_oldrate = 0, s_oldbits = 0, s_oldstereo = 0;
 296
 297 void gp2x_start_sound(int rate, int bits, int stereo)
 298 {
 299         int frag = 0, bsize, buffers;
 300
 301         // if no settings change, we don't need to do anything
 302         if (rate == s_oldrate && s_oldbits == bits && s_oldstereo == stereo) return;
 303
 304         if (sounddev > 0) close(sounddev);
 305         sounddev = open("/dev/dsp", O_WRONLY|O_ASYNC);
 306         if (sounddev == -1)
 307                 printf("open(\"/dev/dsp\") failed with %i\n", errno);
 308
 309         ioctl(sounddev, SNDCTL_DSP_SPEED,  &rate);
 310         ioctl(sounddev, SNDCTL_DSP_SETFMT, &bits);
 311         ioctl(sounddev, SNDCTL_DSP_STEREO, &stereo);
 312         // calculate buffer size
 313         buffers = 16;
 314         bsize = rate / 32;
 315         if (rate > 22050) { bsize*=4; buffers*=2; } // 44k mode seems to be very demanding
 316         while ((bsize>>=1)) frag++;
 317         frag |= buffers<<16; // 16 buffers
 318         ioctl(sounddev, SNDCTL_DSP_SETFRAGMENT, &frag);
 319         printf("gp2x_set_sound: %i/%ibit/%s, %i buffers of %i bytes\n",
 320                 rate, bits, stereo?"stereo":"mono", frag>>16, 1<<(frag&0xffff));
 321
 322         s_oldrate = rate; s_oldbits = bits; s_oldstereo = stereo;
 323 }
 324
 325 void gp2x_sound_write(void *buff, int len)
 326 {
 327         write(sounddev, buff, len);
 328 }
 329
 330 void gp2x_sound_sync(void)
 331 {
 332         ioctl(sounddev, SOUND_PCM_SYNC, 0);
 333 }
 334
 335 void gp2x_sound_volume(int l, int r)
 336 {
 337         l=l<0?0:l; l=l>255?255:l; r=r<0?0:r; r=r>255?255:r;
 338         l<<=8; l|=r;
 339         ioctl(mixerdev, SOUND_MIXER_WRITE_PCM, &l); /*SOUND_MIXER_WRITE_VOLUME*/
 340 }
 341
 342 /* joy */
 343 unsigned long gp2x_joystick_read(int allow_usb_joy)
 344 {
 345         unsigned long value = current_keys;
 346         int i;
 347
 348         if (allow_usb_joy && num_of_joys > 0) {
 349                 // check the usb joy as well..
 350                 gp2x_usbjoy_update();
 351                 for (i = 0; i < num_of_joys; i++)
 352                         value |= gp2x_usbjoy_check(i);
 353         }
 354
 355         return value;
 356 }
 357
 358 /* 940 */
 359 int crashed_940 = 0;
 360 void Pause940(int yes)
 361 {
 362 }
 363
 364 void Reset940(int yes, int bank)
 365 {
 366 }
 367
 368 /* faking gp2x cpuctrl.c */
 369 void cpuctrl_init(void)
 370 {
 371 }
 372
 373 void cpuctrl_deinit(void)
 374 {
 375 }
 376
 377 void set_FCLK(unsigned MHZ)
 378 {
 379 }
 380
 381 void Disable_940(void)
 382 {
 383 }
 384
 385 void gp2x_video_wait_vsync(void)
 386 {
 387 }
 388
 389 void set_RAM_Timings(int tRC, int tRAS, int tWR, int tMRD, int tRFC, int tRP, int tRCD)
 390 {
 391 }
 392
 393 void set_gamma(int g100, int A_SNs_curve)
 394 {
 395 }
 396
 397 void set_LCD_custom_rate(int rate)
 398 {
 399 }
 400
 401 void unset_LCD_custom_rate(void)
 402 {
 403 }
 404
 405 /* squidgehack.c */
 406 int mmuhack(void)
 407 {
 408         return 0;
 409 }
 410
 411
 412 int mmuunhack(void)
 413 {
 414         return 0;
 415 }
 416
 417
 418 /* misc */
 419 void spend_cycles(int c)
 420 {
 421         usleep(c/200);
 422 }
 423
 424
 425