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