libvo/vo_fbdev.c

   1 /*
   2  * video driver for framebuffer device
   3  * copyright (C) 2001 Szabolcs Berecz <szabi@inf.elte.hu>
   4  *
   5  * Some idea and code borrowed from Chris Lawrence's ppmtofb-0.27
   6  * Some fixes and small improvements by Joey Parrish <joey@nicewarrior.org>
   7  *
   8  * This file is part of MPlayer.
   9  *
  10  * MPlayer is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * MPlayer is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License along
  21  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  22  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  23  */
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <fcntl.h>
  29 #include <unistd.h>
  30 #include <errno.h>
  31 #include <ctype.h>
  32
  33 #include <sys/mman.h>
  34 #include <sys/ioctl.h>
  35 #include <sys/kd.h>
  36 #include <linux/fb.h>
  37
  38 #include "config.h"
  39 #include "video_out.h"
  40 #include "video_out_internal.h"
  41 #include "fastmemcpy.h"
  42 #include "sub.h"
  43 #include "geometry.h"
  44 #ifdef CONFIG_VIDIX
  45 #include "vosub_vidix.h"
  46 #endif
  47 #include "aspect.h"
  48 #include "mp_msg.h"
  49 #include "libavutil/common.h"
  50
  51 static const vo_info_t info = {
  52     "Framebuffer Device",
  53     "fbdev",
  54     "Szabolcs Berecz <szabi@inf.elte.hu>",
  55     ""
  56 };
  57
  58 LIBVO_EXTERN(fbdev)
  59
  60 #ifdef CONFIG_VIDIX
  61 /* Name of VIDIX driver */
  62 static const char *vidix_name = NULL;
  63 static vidix_grkey_t gr_key;
  64 #endif
  65 static signed int pre_init_err = -2;
  66 /******************************
  67  *       fb.modes support     *
  68  ******************************/
  69
  70 static range_t *monitor_hfreq = NULL;
  71 static range_t *monitor_vfreq = NULL;
  72 static range_t *monitor_dotclock = NULL;
  73
  74 typedef struct {
  75     char *name;
  76     uint32_t xres, yres, vxres, vyres, depth;
  77     uint32_t pixclock, left, right, upper, lower, hslen, vslen;
  78     uint32_t sync;
  79     uint32_t vmode;
  80 } fb_mode_t;
  81
  82 #define MAX_NR_TOKEN    16
  83
  84 #define MAX_LINE_LEN    1000
  85
  86 #define RET_EOF        -1
  87 #define RET_EOL        -2
  88
  89 static int validate_mode(fb_mode_t *m)
  90 {
  91     if (!m->xres) {
  92         mp_msg(MSGT_VO, MSGL_V, "needs geometry ");
  93         return 0;
  94     }
  95     if (!m->pixclock) {
  96         mp_msg(MSGT_VO, MSGL_V, "needs timings ");
  97         return 0;
  98     }
  99     return 1;
 100 }
 101
 102 static FILE *fp;
 103 static int line_num = 0;
 104 static char *line;
 105 static char *token[MAX_NR_TOKEN];
 106
 107 static int get_token(int num)
 108 {
 109     static int read_nextline = 1;
 110     static int line_pos;
 111     int i;
 112     char c;
 113
 114     if (num >= MAX_NR_TOKEN) {
 115         mp_msg(MSGT_VO, MSGL_V, "get_token(): max >= MAX_NR_TOKEN!\n");
 116         goto out_eof;
 117     }
 118
 119     if (read_nextline) {
 120         if (!fgets(line, MAX_LINE_LEN, fp))
 121             goto out_eof;
 122         line_pos = 0;
 123         ++line_num;
 124         read_nextline = 0;
 125     }
 126     for (i = 0; i < num; i++) {
 127         while (isspace(line[line_pos]))
 128             ++line_pos;
 129         if (line[line_pos] == '\0' || line[line_pos] == '#') {
 130             read_nextline = 1;
 131             goto out_eol;
 132         }
 133         token[i] = line + line_pos;
 134         c = line[line_pos];
 135         if (c == '"' || c == '\'') {
 136             token[i]++;
 137             while (line[++line_pos] != c && line[line_pos])
 138                 /* NOTHING */;
 139             if (!line[line_pos])
 140                 goto out_eol;
 141             line[line_pos] = ' ';
 142         } else {
 143             for (/* NOTHING */; !isspace(line[line_pos]) &&
 144                                 line[line_pos]; line_pos++)
 145                 /* NOTHING */;
 146         }
 147         if (!line[line_pos]) {
 148             read_nextline = 1;
 149             if (i == num - 1)
 150                 goto out_ok;
 151             goto out_eol;
 152         }
 153         line[line_pos++] = '\0';
 154     }
 155 out_ok:
 156     return i;
 157 out_eof:
 158     return RET_EOF;
 159 out_eol:
 160     return RET_EOL;
 161 }
 162
 163 static fb_mode_t *fb_modes = NULL;
 164 static int nr_modes = 0;
 165
 166 static int parse_fbmode_cfg(char *cfgfile)
 167 {
 168 #define CHECK_IN_MODE_DEF\
 169     if (!in_mode_def) {\
 170         mp_msg(MSGT_VO, MSGL_V, "'needs 'mode' first");\
 171         goto err_out_print_linenum;\
 172     }
 173     fb_mode_t *mode = NULL;
 174     char *endptr;    // strtoul()...
 175     int in_mode_def = 0;
 176     int tmp, i;
 177
 178     /* If called more than once, reuse parsed data */
 179     if (nr_modes)
 180         return nr_modes;
 181
 182     mp_msg(MSGT_VO, MSGL_V, "Reading %s: ", cfgfile);
 183
 184     if ((fp = fopen(cfgfile, "r")) == NULL) {
 185         mp_msg(MSGT_VO, MSGL_V, "can't open '%s': %s\n", cfgfile, strerror(errno));
 186         return -1;
 187     }
 188
 189     if ((line = malloc(MAX_LINE_LEN + 1)) == NULL) {
 190         mp_msg(MSGT_VO, MSGL_V, "can't get memory for 'line': %s\n", strerror(errno));
 191         return -2;
 192     }
 193
 194     /*
 195      * check if the cfgfile starts with 'mode'
 196      */
 197     while ((tmp = get_token(1)) == RET_EOL)
 198         /* NOTHING */;
 199     if (tmp == RET_EOF)
 200         goto out;
 201     if (!strcmp(token[0], "mode"))
 202         goto loop_enter;
 203     goto err_out_parse_error;
 204
 205     while ((tmp = get_token(1)) != RET_EOF) {
 206         if (tmp == RET_EOL)
 207             continue;
 208         if (!strcmp(token[0], "mode")) {
 209             if (in_mode_def) {
 210                 mp_msg(MSGT_VO, MSGL_V, "'endmode' required");
 211                 goto err_out_print_linenum;
 212             }
 213             if (!validate_mode(mode))
 214                 goto err_out_not_valid;
 215         loop_enter:
 216             if (!(fb_modes =
 217                   realloc(fb_modes, sizeof(fb_mode_t) * (nr_modes + 1)))) {
 218                 mp_msg(MSGT_VO, MSGL_V, "can't realloc 'fb_modes' (nr_modes = %d):"
 219                        " %s\n", nr_modes, strerror(errno));
 220                 goto err_out;
 221             }
 222             mode = fb_modes + nr_modes;
 223             ++nr_modes;
 224             memset(mode, 0, sizeof(fb_mode_t));
 225
 226             if (get_token(1) < 0)
 227                 goto err_out_parse_error;
 228             for (i = 0; i < nr_modes - 1; i++) {
 229                 if (!strcmp(token[0], fb_modes[i].name)) {
 230                     mp_msg(MSGT_VO, MSGL_V, "mode name '%s' isn't unique", token[0]);
 231                     goto err_out_print_linenum;
 232                 }
 233             }
 234             if (!(mode->name = strdup(token[0]))) {
 235                 mp_msg(MSGT_VO, MSGL_V, "can't strdup -> 'name': %s\n", strerror(errno));
 236                 goto err_out;
 237             }
 238             in_mode_def = 1;
 239         } else if (!strcmp(token[0], "geometry")) {
 240             CHECK_IN_MODE_DEF;
 241             if (get_token(5) < 0)
 242                 goto err_out_parse_error;
 243             mode->xres = strtoul(token[0], &endptr, 0);
 244             if (*endptr)
 245                 goto err_out_parse_error;
 246             mode->yres = strtoul(token[1], &endptr, 0);
 247             if (*endptr)
 248                 goto err_out_parse_error;
 249             mode->vxres = strtoul(token[2], &endptr, 0);
 250             if (*endptr)
 251                 goto err_out_parse_error;
 252             mode->vyres = strtoul(token[3], &endptr, 0);
 253             if (*endptr)
 254                 goto err_out_parse_error;
 255             mode->depth = strtoul(token[4], &endptr, 0);
 256             if (*endptr)
 257                 goto err_out_parse_error;
 258         } else if (!strcmp(token[0], "timings")) {
 259             CHECK_IN_MODE_DEF;
 260             if (get_token(7) < 0)
 261                 goto err_out_parse_error;
 262             mode->pixclock = strtoul(token[0], &endptr, 0);
 263             if (*endptr)
 264                 goto err_out_parse_error;
 265             mode->left = strtoul(token[1], &endptr, 0);
 266             if (*endptr)
 267                 goto err_out_parse_error;
 268             mode->right = strtoul(token[2], &endptr, 0);
 269             if (*endptr)
 270                 goto err_out_parse_error;
 271             mode->upper = strtoul(token[3], &endptr, 0);
 272             if (*endptr)
 273                 goto err_out_parse_error;
 274             mode->lower = strtoul(token[4], &endptr, 0);
 275             if (*endptr)
 276                 goto err_out_parse_error;
 277             mode->hslen = strtoul(token[5], &endptr, 0);
 278             if (*endptr)
 279                 goto err_out_parse_error;
 280             mode->vslen = strtoul(token[6], &endptr, 0);
 281             if (*endptr)
 282                 goto err_out_parse_error;
 283         } else if (!strcmp(token[0], "endmode")) {
 284             CHECK_IN_MODE_DEF;
 285             in_mode_def = 0;
 286         } else if (!strcmp(token[0], "accel")) {
 287             CHECK_IN_MODE_DEF;
 288             if (get_token(1) < 0)
 289                 goto err_out_parse_error;
 290             /*
 291              * it's only used for text acceleration
 292              * so we just ignore it.
 293              */
 294         } else if (!strcmp(token[0], "hsync")) {
 295             CHECK_IN_MODE_DEF;
 296             if (get_token(1) < 0)
 297                 goto err_out_parse_error;
 298             if (!strcmp(token[0], "low"))
 299                 mode->sync &= ~FB_SYNC_HOR_HIGH_ACT;
 300             else if (!strcmp(token[0], "high"))
 301                 mode->sync |= FB_SYNC_HOR_HIGH_ACT;
 302             else
 303                 goto err_out_parse_error;
 304         } else if (!strcmp(token[0], "vsync")) {
 305             CHECK_IN_MODE_DEF;
 306             if (get_token(1) < 0)
 307                 goto err_out_parse_error;
 308             if (!strcmp(token[0], "low"))
 309                 mode->sync &= ~FB_SYNC_VERT_HIGH_ACT;
 310             else if (!strcmp(token[0], "high"))
 311                 mode->sync |= FB_SYNC_VERT_HIGH_ACT;
 312             else
 313                 goto err_out_parse_error;
 314         } else if (!strcmp(token[0], "csync")) {
 315             CHECK_IN_MODE_DEF;
 316             if (get_token(1) < 0)
 317                 goto err_out_parse_error;
 318             if (!strcmp(token[0], "low"))
 319                 mode->sync &= ~FB_SYNC_COMP_HIGH_ACT;
 320             else if (!strcmp(token[0], "high"))
 321                 mode->sync |= FB_SYNC_COMP_HIGH_ACT;
 322             else
 323                 goto err_out_parse_error;
 324         } else if (!strcmp(token[0], "extsync")) {
 325             CHECK_IN_MODE_DEF;
 326             if (get_token(1) < 0)
 327                 goto err_out_parse_error;
 328             if (!strcmp(token[0], "false"))
 329                 mode->sync &= ~FB_SYNC_EXT;
 330             else if (!strcmp(token[0], "true"))
 331                 mode->sync |= FB_SYNC_EXT;
 332             else
 333                 goto err_out_parse_error;
 334         } else if (!strcmp(token[0], "laced")) {
 335             CHECK_IN_MODE_DEF;
 336             if (get_token(1) < 0)
 337                 goto err_out_parse_error;
 338             if (!strcmp(token[0], "false"))
 339                 mode->vmode = FB_VMODE_NONINTERLACED;
 340             else if (!strcmp(token[0], "true"))
 341                 mode->vmode = FB_VMODE_INTERLACED;
 342             else
 343                 goto err_out_parse_error;
 344         } else if (!strcmp(token[0], "double")) {
 345             CHECK_IN_MODE_DEF;
 346             if (get_token(1) < 0)
 347                 goto err_out_parse_error;
 348             if (!strcmp(token[0], "false"))
 349                 ;
 350             else if (!strcmp(token[0], "true"))
 351                 mode->vmode = FB_VMODE_DOUBLE;
 352             else
 353                 goto err_out_parse_error;
 354         } else
 355             goto err_out_parse_error;
 356     }
 357     if (!validate_mode(mode))
 358         goto err_out_not_valid;
 359 out:
 360     mp_msg(MSGT_VO, MSGL_V, "%d modes\n", nr_modes);
 361     free(line);
 362     fclose(fp);
 363     return nr_modes;
 364 err_out_parse_error:
 365     mp_msg(MSGT_VO, MSGL_V, "parse error");
 366 err_out_print_linenum:
 367     mp_msg(MSGT_VO, MSGL_V, " at line %d\n", line_num);
 368 err_out:
 369     free(fb_modes);
 370     fb_modes = NULL;
 371     nr_modes = 0;
 372     free(line);
 373     free(fp);
 374     return -2;
 375 err_out_not_valid:
 376     mp_msg(MSGT_VO, MSGL_V, "previous mode is not correct");
 377     goto err_out_print_linenum;
 378 }
 379
 380 static fb_mode_t *find_mode_by_name(char *name)
 381 {
 382     int i;
 383
 384     for (i = 0; i < nr_modes; i++)
 385         if (!strcmp(name, fb_modes[i].name))
 386             return fb_modes + i;
 387     return NULL;
 388 }
 389
 390 static float dcf(fb_mode_t *m)    //driving clock frequency
 391 {
 392     return 1e12f / m->pixclock;
 393 }
 394
 395 static float hsf(fb_mode_t *m)    //horizontal scan frequency
 396 {
 397     int htotal = m->left + m->xres + m->right + m->hslen;
 398     return dcf(m) / htotal;
 399 }
 400
 401 static float vsf(fb_mode_t *m)    //vertical scan frequency
 402 {
 403     int vtotal = m->upper + m->yres + m->lower + m->vslen;
 404     return hsf(m) / vtotal;
 405 }
 406
 407
 408 static int mode_works(fb_mode_t *m, range_t *hfreq, range_t *vfreq,
 409                       range_t *dotclock)
 410 {
 411     float h = hsf(m);
 412     float v = vsf(m);
 413     float d = dcf(m);
 414     int ret = 1;
 415
 416     mp_msg(MSGT_VO, MSGL_DBG2, "mode %dx%d:", m->xres, m->yres);
 417     if (!in_range(hfreq, h)) {
 418         ret = 0;
 419         mp_msg(MSGT_VO, MSGL_DBG2, " hsync out of range.");
 420     }
 421     if (!in_range(vfreq, v)) {
 422         ret = 0;
 423         mp_msg(MSGT_VO, MSGL_DBG2, " vsync out of range.");
 424     }
 425     if (!in_range(dotclock, d)) {
 426         ret = 0;
 427         mp_msg(MSGT_VO, MSGL_DBG2, " dotclock out of range.");
 428     }
 429     if (ret)
 430         mp_msg(MSGT_VO, MSGL_DBG2, " hsync, vsync, dotclock ok.\n");
 431     else
 432         mp_msg(MSGT_VO, MSGL_DBG2, "\n");
 433
 434     return ret;
 435 }
 436
 437 static fb_mode_t *find_best_mode(int xres, int yres, range_t *hfreq,
 438                                  range_t *vfreq, range_t *dotclock)
 439 {
 440     int i;
 441     fb_mode_t *best = fb_modes;
 442     fb_mode_t *curr;
 443
 444     mp_msg(MSGT_VO, MSGL_DBG2, "Searching for first working mode\n");
 445
 446     for (i = 0; i < nr_modes; i++, best++)
 447         if (mode_works(best, hfreq, vfreq, dotclock))
 448             break;
 449
 450     if (i == nr_modes)
 451         return NULL;
 452     if (i == nr_modes - 1)
 453         return best;
 454
 455     mp_msg(MSGT_VO, MSGL_DBG2, "First working mode: %dx%d\n", best->xres, best->yres);
 456     mp_msg(MSGT_VO, MSGL_DBG2, "Searching for better modes\n");
 457
 458     for (curr = best + 1; i < nr_modes - 1; i++, curr++) {
 459         if (!mode_works(curr, hfreq, vfreq, dotclock))
 460             continue;
 461
 462         if (best->xres < xres || best->yres < yres) {
 463             if (curr->xres > best->xres || curr->yres > best->yres) {
 464                 mp_msg(MSGT_VO, MSGL_DBG2, "better than %dx%d, which is too small.\n",
 465                        best->xres, best->yres);
 466                 best = curr;
 467             } else
 468                 mp_msg(MSGT_VO, MSGL_DBG2, "too small.\n");
 469         } else if (curr->xres == best->xres && curr->yres == best->yres &&
 470                    vsf(curr) > vsf(best)) {
 471             mp_msg(MSGT_VO, MSGL_DBG2, "faster screen refresh.\n");
 472             best = curr;
 473         } else if ((curr->xres <= best->xres && curr->yres <= best->yres) &&
 474                 (curr->xres >= xres && curr->yres >= yres)) {
 475             mp_msg(MSGT_VO, MSGL_DBG2, "better than %dx%d, which is too large.\n",
 476                    best->xres, best->yres);
 477             best = curr;
 478         } else {
 479             if (curr->xres < xres || curr->yres < yres)
 480                 mp_msg(MSGT_VO, MSGL_DBG2, "too small.\n");
 481             else if (curr->xres > best->xres || curr->yres > best->yres)
 482                 mp_msg(MSGT_VO, MSGL_DBG2, "too large.\n");
 483             else
 484                 mp_msg(MSGT_VO, MSGL_DBG2, "it's worse, don't know why.\n");
 485         }
 486     }
 487
 488     return best;
 489 }
 490
 491 static void set_bpp(struct fb_var_screeninfo *p, int bpp)
 492 {
 493     p->bits_per_pixel = FFALIGN(bpp, 2);
 494     p->red.msb_right  = p->green.msb_right = p->blue.msb_right = p->transp.msb_right = 0;
 495     p->transp.offset  = p->transp.length = 0;
 496     p->blue.offset    = 0;
 497     switch (bpp) {
 498     case 32:
 499         p->transp.offset = 24;
 500         p->transp.length = 8;
 501     case 24:
 502         p->red.offset   = 16;
 503         p->red.length   = 8;
 504         p->green.offset = 8;
 505         p->green.length = 8;
 506         p->blue.length  = 8;
 507         break;
 508     case 16:
 509         p->red.offset   = 11;
 510         p->green.length = 6;
 511         p->red.length   = 5;
 512         p->green.offset = 5;
 513         p->blue.length  = 5;
 514         break;
 515     case 15:
 516         p->red.offset   = 10;
 517         p->green.length = 5;
 518         p->red.length   = 5;
 519         p->green.offset = 5;
 520         p->blue.length  = 5;
 521         break;
 522     case 12:
 523         p->red.offset   = 8;
 524         p->green.length = 4;
 525         p->red.length   = 4;
 526         p->green.offset = 4;
 527         p->blue.length  = 4;
 528         break;
 529     }
 530 }
 531
 532 static void fb_mode2fb_vinfo(fb_mode_t *m, struct fb_var_screeninfo *v)
 533 {
 534     v->xres         = m->xres;
 535     v->yres         = m->yres;
 536     v->xres_virtual = m->vxres;
 537     v->yres_virtual = m->vyres;
 538     set_bpp(v, m->depth);
 539     v->pixclock     = m->pixclock;
 540     v->left_margin  = m->left;
 541     v->right_margin = m->right;
 542     v->upper_margin = m->upper;
 543     v->lower_margin = m->lower;
 544     v->hsync_len    = m->hslen;
 545     v->vsync_len    = m->vslen;
 546     v->sync         = m->sync;
 547     v->vmode        = m->vmode;
 548 }
 549
 550
 551 /******************************
 552 *        vo_fbdev          *
 553 ******************************/
 554
 555 /* command line/config file options */
 556 static char *fb_dev_name = NULL;
 557 char *fb_mode_cfgfile = NULL;
 558 char *fb_mode_name = NULL;
 559
 560 static fb_mode_t *fb_mode = NULL;
 561
 562 /* vo_fbdev related variables */
 563 static int fb_dev_fd;
 564 static int fb_tty_fd = -1;
 565 static size_t fb_size;
 566 static uint8_t *frame_buffer;
 567 static uint8_t *center;
 568 static struct fb_fix_screeninfo fb_finfo;
 569 static struct fb_var_screeninfo fb_orig_vinfo;
 570 static struct fb_var_screeninfo fb_vinfo;
 571 static unsigned short fb_ored[256], fb_ogreen[256], fb_oblue[256];
 572 static struct fb_cmap fb_oldcmap = { 0, 256, fb_ored, fb_ogreen, fb_oblue };
 573 static int fb_cmap_changed = 0;
 574 static int fb_pixel_size;       // 32:  4  24:  3  16:  2  15:  2
 575 static int fb_bpp;              // 32: 32  24: 24  16: 16  15: 15
 576 static int fb_bpp_we_want;      // 32: 32  24: 24  16: 16  15: 15
 577 static int fb_line_len;
 578 static int fb_xres;
 579 static int fb_yres;
 580 static int fb_page;
 581 static void (*draw_alpha_p)(int w, int h, unsigned char *src,
 582                             unsigned char *srca, int stride,
 583                             unsigned char *dst, int dstride);
 584
 585 static int in_width;
 586 static int in_height;
 587 static int out_width;
 588 static int out_height;
 589 static int first_row;
 590 static int last_row;
 591 static uint32_t pixel_format;
 592 static int fs;
 593
 594 /*
 595  * Note: this function is completely cut'n'pasted from
 596  * Chris Lawrence's code.
 597  * (modified a bit to fit in my code...)
 598  */
 599 static struct fb_cmap *make_directcolor_cmap(struct fb_var_screeninfo *var)
 600 {
 601     /* Hopefully any DIRECTCOLOR device will have a big enough palette
 602      * to handle mapping the full color depth.
 603      * e.g. 8 bpp -> 256 entry palette
 604      *
 605      * We could handle some sort of gamma here
 606      */
 607     int i, cols, rcols, gcols, bcols;
 608     uint16_t *red, *green, *blue;
 609     struct fb_cmap *cmap;
 610
 611     rcols = 1 << var->red.length;
 612     gcols = 1 << var->green.length;
 613     bcols = 1 << var->blue.length;
 614
 615     /* Make our palette the length of the deepest color */
 616     cols = FFMAX3(rcols, gcols, bcols);
 617
 618     red = malloc(cols * sizeof(red[0]));
 619     if (!red) {
 620         mp_msg(MSGT_VO, MSGL_V, "Can't allocate red palette with %d entries.\n", cols);
 621         return NULL;
 622     }
 623     for (i = 0; i < rcols; i++)
 624         red[i] = (65535 / (rcols - 1)) * i;
 625
 626     green = malloc(cols * sizeof(green[0]));
 627     if (!green) {
 628         mp_msg(MSGT_VO, MSGL_V, "Can't allocate green palette with %d entries.\n", cols);
 629         free(red);
 630         return NULL;
 631     }
 632     for (i = 0; i < gcols; i++)
 633         green[i] = (65535 / (gcols - 1)) * i;
 634
 635     blue = malloc(cols * sizeof(blue[0]));
 636     if (!blue) {
 637         mp_msg(MSGT_VO, MSGL_V, "Can't allocate blue palette with %d entries.\n", cols);
 638         free(red);
 639         free(green);
 640         return NULL;
 641     }
 642     for (i = 0; i < bcols; i++)
 643         blue[i] = (65535 / (bcols - 1)) * i;
 644
 645     cmap = malloc(sizeof(struct fb_cmap));
 646     if (!cmap) {
 647         mp_msg(MSGT_VO, MSGL_V, "Can't allocate color map\n");
 648         free(red);
 649         free(green);
 650         free(blue);
 651         return NULL;
 652     }
 653     cmap->start  = 0;
 654     cmap->transp = 0;
 655     cmap->len    = cols;
 656     cmap->red    = red;
 657     cmap->blue   = blue;
 658     cmap->green  = green;
 659     cmap->transp = NULL;
 660
 661     return cmap;
 662 }
 663
 664
 665 static int fb_preinit(int reset)
 666 {
 667     static int fb_preinit_done = 0;
 668     static int fb_works = 0;
 669
 670     if (reset) {
 671         fb_preinit_done = 0;
 672         return 0;
 673     }
 674
 675     if (fb_preinit_done)
 676         return fb_works;
 677
 678     fb_dev_fd = fb_tty_fd = -1;
 679
 680     if (!fb_dev_name && !(fb_dev_name = getenv("FRAMEBUFFER")))
 681         fb_dev_name = strdup("/dev/fb0");
 682     mp_msg(MSGT_VO, MSGL_V, "using %s\n", fb_dev_name);
 683
 684     if ((fb_dev_fd = open(fb_dev_name, O_RDWR)) == -1) {
 685         mp_msg(MSGT_VO, MSGL_ERR, "Can't open %s: %s\n", fb_dev_name, strerror(errno));
 686         goto err_out;
 687     }
 688     if (ioctl(fb_dev_fd, FBIOGET_VSCREENINFO, &fb_vinfo)) {
 689         mp_msg(MSGT_VO, MSGL_ERR, "Can't get VSCREENINFO: %s\n", strerror(errno));
 690         goto err_out;
 691     }
 692     fb_orig_vinfo = fb_vinfo;
 693
 694     if ((fb_tty_fd = open("/dev/tty", O_RDWR)) < 0) {
 695         mp_msg(MSGT_VO, MSGL_ERR, "notice: Can't open /dev/tty: %s\n", strerror(errno));
 696     }
 697
 698     fb_bpp = fb_vinfo.bits_per_pixel;
 699     if (fb_bpp == 16)
 700         fb_bpp = fb_vinfo.red.length  + fb_vinfo.green.length + fb_vinfo.blue.length;
 701
 702     if (fb_bpp == 8 && !vo_dbpp) {
 703         mp_msg(MSGT_VO, MSGL_ERR, "8 bpp output is not supported.\n");
 704         goto err_out;
 705     }
 706
 707     if (vo_dbpp) {
 708         if (vo_dbpp != 12 && vo_dbpp != 15 && vo_dbpp != 16
 709                           && vo_dbpp != 24 && vo_dbpp != 32) {
 710             mp_msg(MSGT_VO, MSGL_ERR, "can't switch to %d bpp\n", vo_dbpp);
 711             goto err_out;
 712         }
 713         fb_bpp = vo_dbpp;
 714     }
 715
 716     if (!fb_mode_cfgfile)
 717         fb_mode_cfgfile = strdup("/etc/fb.modes");
 718
 719     fb_preinit_done = 1;
 720     fb_works = 1;
 721     return 1;
 722 err_out:
 723     if (fb_tty_fd != -1)
 724     close(fb_tty_fd);
 725     fb_tty_fd = -1;
 726     if (fb_dev_fd != -1)
 727     close(fb_dev_fd);
 728     fb_dev_fd = -1;
 729     fb_preinit_done = 1;
 730     fb_works = 0;
 731     return 0;
 732 }
 733
 734 static void vt_set_textarea(int u, int l)
 735 {
 736     /* how can I determine the font height?
 737      * just use 16 for now
 738      */
 739     int urow = ((u + 15) / 16) + 1;
 740     int lrow = l / 16;
 741
 742     mp_msg(MSGT_VO, MSGL_DBG2, "vt_set_textarea(%d,%d): %d,%d\n", u, l, urow, lrow);
 743     if (fb_tty_fd >= 0) {
 744         char modestring[100];
 745         snprintf(modestring, sizeof(modestring), "\33[%d;%dr\33[%d;%dH", urow, lrow, lrow, 0);
 746         write(fb_tty_fd, modestring, strlen(modestring));
 747         fsync(fb_tty_fd);
 748     }
 749 }
 750
 751 static int config(uint32_t width, uint32_t height, uint32_t d_width,
 752                   uint32_t d_height, uint32_t flags, char *title,
 753                   uint32_t format)
 754 {
 755     struct fb_cmap *cmap;
 756     int vm   = flags & VOFLAG_MODESWITCHING;
 757     int zoom = flags & VOFLAG_SWSCALE;
 758
 759     fs = flags & VOFLAG_FULLSCREEN;
 760
 761     if (pre_init_err == -2) {
 762         mp_msg(MSGT_VO, MSGL_ERR, "Internal fatal error: config() was called before preinit()\n");
 763         return -1;
 764     }
 765
 766     if (pre_init_err)
 767         return 1;
 768
 769     if (fb_mode_name && !vm) {
 770         mp_msg(MSGT_VO, MSGL_ERR, "-fbmode can only be used with -vm\n");
 771         return 1;
 772     }
 773     if (vm && parse_fbmode_cfg(fb_mode_cfgfile) < 0)
 774         return 1;
 775     if (d_width && (fs || vm)) {
 776         out_width  = d_width;
 777         out_height = d_height;
 778     } else {
 779         out_width  = width;
 780         out_height = height;
 781     }
 782     in_width     = width;
 783     in_height    = height;
 784     pixel_format = format;
 785
 786     if (fb_mode_name) {
 787         if (!(fb_mode = find_mode_by_name(fb_mode_name))) {
 788             mp_msg(MSGT_VO, MSGL_ERR, "can't find requested video mode\n");
 789             return 1;
 790         }
 791         fb_mode2fb_vinfo(fb_mode, &fb_vinfo);
 792     } else if (vm) {
 793         monitor_hfreq = str2range(monitor_hfreq_str);
 794         monitor_vfreq = str2range(monitor_vfreq_str);
 795         monitor_dotclock = str2range(monitor_dotclock_str);
 796         if (!monitor_hfreq || !monitor_vfreq || !monitor_dotclock) {
 797             mp_msg(MSGT_VO, MSGL_ERR, "you have to specify the capabilities of"
 798                    " the monitor.\n");
 799             return 1;
 800         }
 801         if (!(fb_mode = find_best_mode(out_width, out_height, monitor_hfreq,
 802                                        monitor_vfreq, monitor_dotclock))) {
 803             mp_msg(MSGT_VO, MSGL_ERR, "can't find best video mode\n");
 804             return 1;
 805         }
 806         mp_msg(MSGT_VO, MSGL_V, "using mode %dx%d @ %.1fHz\n", fb_mode->xres,
 807                fb_mode->yres, vsf(fb_mode));
 808         fb_mode2fb_vinfo(fb_mode, &fb_vinfo);
 809     }
 810     fb_bpp_we_want = fb_bpp;
 811     set_bpp(&fb_vinfo, fb_bpp);
 812     fb_vinfo.xres_virtual = fb_vinfo.xres;
 813     fb_vinfo.yres_virtual = fb_vinfo.yres;
 814     fb_page = 0;
 815     if (vo_doublebuffering) {
 816         fb_vinfo.yres_virtual <<= 1;
 817         fb_vinfo.yoffset = 0;
 818         fb_page = 1; // start writing into the page we don't display
 819     }
 820
 821     if (fb_tty_fd >= 0 && ioctl(fb_tty_fd, KDSETMODE, KD_GRAPHICS) < 0) {
 822         mp_msg(MSGT_VO, MSGL_V, "Can't set graphics mode: %s\n", strerror(errno));
 823         close(fb_tty_fd);
 824         fb_tty_fd = -1;
 825     }
 826
 827     if (ioctl(fb_dev_fd, FBIOPUT_VSCREENINFO, &fb_vinfo))
 828         // Intel drivers fail if we request a transparency channel
 829         fb_vinfo.transp.length = fb_vinfo.transp.offset = 0;
 830     if (ioctl(fb_dev_fd, FBIOPUT_VSCREENINFO, &fb_vinfo)) {
 831         mp_msg(MSGT_VO, MSGL_ERR, "Can't put VSCREENINFO: %s\n", strerror(errno));
 832         if (fb_tty_fd >= 0 && ioctl(fb_tty_fd, KDSETMODE, KD_TEXT) < 0) {
 833             mp_msg(MSGT_VO, MSGL_ERR, "Can't restore text mode: %s\n", strerror(errno));
 834         }
 835         return 1;
 836     }
 837
 838     fb_pixel_size = fb_vinfo.bits_per_pixel / 8;
 839     fb_bpp = fb_vinfo.bits_per_pixel;
 840     if (fb_bpp == 16)
 841         fb_bpp = fb_vinfo.red.length  + fb_vinfo.green.length + fb_vinfo.blue.length;
 842     if (fb_bpp_we_want != fb_bpp)
 843         mp_msg(MSGT_VO, MSGL_WARN, "requested %d bpp, got %d bpp!!!\n",
 844                fb_bpp_we_want, fb_bpp);
 845
 846     switch (fb_bpp) {
 847     case 32:
 848         draw_alpha_p = vo_draw_alpha_rgb32;
 849         break;
 850     case 24:
 851         draw_alpha_p = vo_draw_alpha_rgb24;
 852         break;
 853     case 16:
 854         draw_alpha_p = vo_draw_alpha_rgb16;
 855         break;
 856     case 15:
 857         draw_alpha_p = vo_draw_alpha_rgb15;
 858         break;
 859     case 12:
 860         draw_alpha_p = vo_draw_alpha_rgb12;
 861         break;
 862     default:
 863         return 1;
 864     }
 865
 866     fb_xres = fb_vinfo.xres;
 867     fb_yres = fb_vinfo.yres;
 868
 869     if (vm || fs) {
 870         out_width  = fb_xres;
 871         out_height = fb_yres;
 872     }
 873     if (out_width < in_width || out_height < in_height) {
 874         mp_msg(MSGT_VO, MSGL_ERR, "screensize is smaller than video size\n");
 875         return 1;
 876     }
 877
 878     first_row = (out_height - in_height) / 2;
 879     last_row  = (out_height + in_height) / 2;
 880
 881     if (ioctl(fb_dev_fd, FBIOGET_FSCREENINFO, &fb_finfo)) {
 882         mp_msg(MSGT_VO, MSGL_ERR, "Can't get FSCREENINFO: %s\n", strerror(errno));
 883         return 1;
 884     }
 885
 886     if (fb_finfo.type != FB_TYPE_PACKED_PIXELS) {
 887         mp_msg(MSGT_VO, MSGL_ERR, "type %d not supported\n", fb_finfo.type);
 888         return 1;
 889     }
 890
 891     switch (fb_finfo.visual) {
 892     case FB_VISUAL_TRUECOLOR:
 893         break;
 894     case FB_VISUAL_DIRECTCOLOR:
 895         mp_msg(MSGT_VO, MSGL_V, "creating cmap for directcolor\n");
 896         if (ioctl(fb_dev_fd, FBIOGETCMAP, &fb_oldcmap)) {
 897             mp_msg(MSGT_VO, MSGL_ERR, "can't get cmap: %s\n",
 898                     strerror(errno));
 899             return 1;
 900         }
 901         if (!(cmap = make_directcolor_cmap(&fb_vinfo)))
 902             return 1;
 903         if (ioctl(fb_dev_fd, FBIOPUTCMAP, cmap)) {
 904             mp_msg(MSGT_VO, MSGL_ERR, "can't put cmap: %s\n",
 905                    strerror(errno));
 906             return 1;
 907         }
 908         fb_cmap_changed = 1;
 909         free(cmap->red);
 910         free(cmap->green);
 911         free(cmap->blue);
 912         free(cmap);
 913         break;
 914     default:
 915         mp_msg(MSGT_VO, MSGL_ERR, "visual: %d not yet supported\n",
 916                fb_finfo.visual);
 917         return 1;
 918     }
 919
 920     fb_line_len = fb_finfo.line_length;
 921     fb_size     = fb_finfo.smem_len;
 922     if (vo_doublebuffering && fb_size < 2 * fb_yres * fb_line_len)
 923     {
 924         mp_msg(MSGT_VO, MSGL_WARN, "framebuffer too small for double-buffering, disabling\n");
 925         vo_doublebuffering = 0;
 926         fb_page = 0;
 927     }
 928
 929 #ifdef CONFIG_VIDIX
 930     if (vidix_name) {
 931         unsigned image_width, image_height, x_offset, y_offset;
 932         if (zoom || fs) {
 933             aspect_save_orig(width, height);
 934             aspect_save_prescale(d_width, d_height);
 935             aspect_save_screenres(fb_xres, fb_yres);
 936             aspect(&image_width, &image_height, fs ? A_ZOOM : A_NOZOOM);
 937         } else {
 938             image_width  = width;
 939             image_height = height;
 940         }
 941
 942         if (fb_xres > image_width)
 943             x_offset = (fb_xres - image_width) / 2;
 944         else
 945             x_offset = 0;
 946         if (fb_yres > image_height)
 947             y_offset = (fb_yres - image_height) / 2;
 948         else
 949             y_offset = 0;
 950
 951         if (vidix_init(width, height, x_offset, y_offset, image_width,
 952                        image_height, format, fb_bpp, fb_xres, fb_yres) != 0) {
 953             mp_msg(MSGT_VO, MSGL_ERR, "Can't initialize VIDIX driver\n");
 954             vidix_name = NULL;
 955             vidix_term();
 956             return -1;
 957         } else
 958             mp_msg(MSGT_VO, MSGL_V, "Using VIDIX\n");
 959         vidix_start();
 960         if (vidix_grkey_support()) {
 961             vidix_grkey_get(&gr_key);
 962             gr_key.key_op = KEYS_PUT;
 963             if (!(vo_colorkey & 0xff000000)) {
 964                 gr_key.ckey.op    = CKEY_TRUE;
 965                 gr_key.ckey.red   = (vo_colorkey & 0x00ff0000) >> 16;
 966                 gr_key.ckey.green = (vo_colorkey & 0x0000ff00) >> 8;
 967                 gr_key.ckey.blue  =  vo_colorkey & 0x000000ff;
 968             } else
 969                 gr_key.ckey.op = CKEY_FALSE;
 970             vidix_grkey_set(&gr_key);
 971         }
 972     } else
 973 #endif
 974     {
 975         int x_offset = 0, y_offset = 0;
 976         geometry(&x_offset, &y_offset, &out_width, &out_height, fb_xres, fb_yres);
 977
 978         frame_buffer = mmap(0, fb_size, PROT_READ | PROT_WRITE,
 979                             MAP_SHARED, fb_dev_fd, 0);
 980         if (frame_buffer == (uint8_t *) -1) {
 981             mp_msg(MSGT_VO, MSGL_ERR, "Can't mmap %s: %s\n", fb_dev_name, strerror(errno));
 982             return 1;
 983         }
 984
 985         center = frame_buffer +
 986                  ( (out_width  - in_width)  / 2 ) * fb_pixel_size +
 987                  ( (out_height - in_height) / 2 ) * fb_line_len +
 988                  x_offset * fb_pixel_size + y_offset * fb_line_len +
 989                  fb_page * fb_yres * fb_line_len;
 990
 991         mp_msg(MSGT_VO, MSGL_DBG2, "frame_buffer @ %p\n", frame_buffer);
 992         mp_msg(MSGT_VO, MSGL_DBG2, "center @ %p\n", center);
 993         mp_msg(MSGT_VO, MSGL_V, "pixel per line: %d\n", fb_line_len / fb_pixel_size);
 994
 995         if (fs || vm) {
 996             int clear_size = fb_line_len * fb_yres;
 997             if (vo_doublebuffering)
 998                 clear_size <<= 1;
 999             memset(frame_buffer, 0, clear_size);
1000         }
1001     }
1002
1003     vt_set_textarea(last_row, fb_yres);
1004
1005     return 0;
1006 }
1007
1008 static int query_format(uint32_t format)
1009 {
1010     if (!fb_preinit(0))
1011         return 0;
1012 #ifdef CONFIG_VIDIX
1013     if (vidix_name)
1014         return vidix_query_fourcc(format);
1015 #endif
1016     if ((format & IMGFMT_BGR_MASK) == IMGFMT_BGR) {
1017         int bpp = format & 0xff;
1018
1019         if (bpp == fb_bpp)
1020             return VFCAP_ACCEPT_STRIDE | VFCAP_CSP_SUPPORTED | VFCAP_CSP_SUPPORTED_BY_HW;
1021     }
1022     return 0;
1023 }
1024
1025 static void draw_alpha(int x0, int y0, int w, int h, unsigned char *src,
1026                        unsigned char *srca, int stride)
1027 {
1028     unsigned char *dst;
1029
1030     dst = center + fb_line_len * y0 + fb_pixel_size * x0;
1031
1032     (*draw_alpha_p)(w, h, src, srca, stride, dst, fb_line_len);
1033 }
1034
1035 static int draw_frame(uint8_t *src[])
1036 {
1037     return 1;
1038 }
1039
1040 static int draw_slice(uint8_t *src[], int stride[], int w, int h, int x, int y)
1041 {
1042     uint8_t *d;
1043
1044     d = center + fb_line_len * y + fb_pixel_size * x;
1045
1046     memcpy_pic2(d, src[0], w * fb_pixel_size, h, fb_line_len, stride[0], 1);
1047
1048     return 0;
1049 }
1050
1051 static void check_events(void)
1052 {
1053 }
1054
1055 static void flip_page(void)
1056 {
1057     int next_page = !fb_page;
1058     int page_delta = next_page - fb_page;
1059 #ifdef CONFIG_VIDIX
1060     if (vidix_name)
1061         return;
1062 #endif
1063     if (!vo_doublebuffering)
1064         return;
1065
1066     fb_vinfo.yoffset = fb_page * fb_yres;
1067     ioctl(fb_dev_fd, FBIOPAN_DISPLAY, &fb_vinfo);
1068
1069     center += page_delta * fb_yres * fb_line_len;
1070     fb_page = next_page;
1071 }
1072
1073 static void draw_osd(void)
1074 {
1075     vo_draw_text(in_width, in_height, draw_alpha);
1076 }
1077
1078 static void uninit(void)
1079 {
1080     if (fb_cmap_changed) {
1081         if (ioctl(fb_dev_fd, FBIOPUTCMAP, &fb_oldcmap))
1082             mp_msg(MSGT_VO, MSGL_WARN, "Can't restore original cmap\n");
1083         fb_cmap_changed = 0;
1084     }
1085     if (ioctl(fb_dev_fd, FBIOGET_VSCREENINFO, &fb_vinfo))
1086         mp_msg(MSGT_VO, MSGL_WARN, "ioctl FBIOGET_VSCREENINFO: %s\n", strerror(errno));
1087     fb_orig_vinfo.xoffset = fb_vinfo.xoffset;
1088     fb_orig_vinfo.yoffset = fb_vinfo.yoffset;
1089     if (ioctl(fb_dev_fd, FBIOPUT_VSCREENINFO, &fb_orig_vinfo))
1090         mp_msg(MSGT_VO, MSGL_WARN, "Can't reset original fb_var_screeninfo: %s\n", strerror(errno));
1091     if (fb_tty_fd >= 0) {
1092         if (ioctl(fb_tty_fd, KDSETMODE, KD_TEXT) < 0)
1093             mp_msg(MSGT_VO, MSGL_WARN, "Can't restore text mode: %s\n", strerror(errno));
1094     }
1095     vt_set_textarea(0, fb_orig_vinfo.yres);
1096     close(fb_tty_fd);
1097     close(fb_dev_fd);
1098     if (frame_buffer)
1099         munmap(frame_buffer, fb_size);
1100     frame_buffer = NULL;
1101 #ifdef CONFIG_VIDIX
1102     if (vidix_name)
1103         vidix_term();
1104 #endif
1105     fb_preinit(1);
1106 }
1107
1108 static int preinit(const char *vo_subdevice)
1109 {
1110     pre_init_err = 0;
1111
1112     if (vo_subdevice) {
1113 #ifdef CONFIG_VIDIX
1114         if (memcmp(vo_subdevice, "vidix", 5) == 0)
1115             vidix_name = &vo_subdevice[5];
1116         if (vidix_name)
1117             pre_init_err = vidix_preinit(vidix_name,
1118                                          video_out_fbdev.old_functions);
1119         else
1120 #endif
1121         {
1122             free(fb_dev_name);
1123             fb_dev_name = strdup(vo_subdevice);
1124         }
1125     }
1126     if (!pre_init_err)
1127         return pre_init_err = fb_preinit(0) ? 0 : -1;
1128     return -1;
1129 }
1130
1131 static uint32_t get_image(mp_image_t *mpi)
1132 {
1133     if (!IMGFMT_IS_BGR(mpi->imgfmt) ||
1134         IMGFMT_BGR_DEPTH(mpi->imgfmt) != fb_bpp ||
1135         (mpi->type != MP_IMGTYPE_STATIC && mpi->type != MP_IMGTYPE_TEMP) ||
1136         (mpi->flags & MP_IMGFLAG_PLANAR) ||
1137         (mpi->flags & MP_IMGFLAG_YUV) ||
1138         mpi->width != in_width ||
1139         mpi->height != in_height
1140        )
1141         return VO_FALSE;
1142
1143     mpi->planes[0] = center;
1144     mpi->stride[0] = fb_line_len;
1145     mpi->flags    |= MP_IMGFLAG_DIRECT;
1146     return VO_TRUE;
1147 }
1148
1149 static int control(uint32_t request, void *data)
1150 {
1151     switch (request) {
1152     case VOCTRL_GET_IMAGE:
1153         return get_image(data);
1154     case VOCTRL_QUERY_FORMAT:
1155         return query_format(*(uint32_t*)data);
1156     }
1157
1158 #ifdef CONFIG_VIDIX
1159     if (vidix_name) {
1160         switch (request) {
1161         case VOCTRL_SET_EQUALIZER:
1162         case VOCTRL_GET_EQUALIZER:
1163             return vidix_control(request, data);
1164         }
1165     }
1166 #endif
1167
1168     return VO_NOTIMPL;
1169 }