fbff.c

   1 /*
   2  * fbff - a small ffmpeg-based framebuffer/oss media player
   3  *
   4  * Copyright (C) 2009-2015 Ali Gholami Rudi
   5  *
   6  * This program is released under the Modified BSD license.
   7  */
   8 #include <ctype.h>
   9 #include <fcntl.h>
  10 #include <pty.h>
  11 #include <stdint.h>
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <string.h>
  15 #include <termios.h>
  16 #include <unistd.h>
  17 #include <sys/poll.h>
  18 #include <sys/soundcard.h>
  19 #include <pthread.h>
  20 #include "ffs.h"
  21 #include "draw.h"
  22
  23 #define MIN(a, b)       ((a) < (b) ? (a) : (b))
  24 #define MAX(a, b)       ((a) > (b) ? (a) : (b))
  25
  26 typedef unsigned int fbval_t;   /* framebuffer depth */
  27
  28 static int paused;
  29 static int exited;
  30 static int domark;
  31 static int dojump;
  32 static int arg;
  33 static char filename[32];
  34
  35 static float zoom = 1;
  36 static int magnify = 1;
  37 static int jump = 0;
  38 static int fullscreen = 0;
  39 static int video = 1;           /* video stream; 0:none, 1:auto, >1:idx */
  40 static int audio = 1;           /* audio stream; 0:none, 1:auto, >1:idx */
  41 static int posx, posy;          /* video position */
  42 static int rjust, bjust;        /* justify video to screen right/bottom */
  43
  44 static struct ffs *affs;        /* audio ffmpeg stream */
  45 static struct ffs *vffs;        /* video ffmpeg stream */
  46 static int afd;                 /* oss fd */
  47 static int vnum;                /* decoded video frame count */
  48 static long mark[256];          /* marks */
  49
  50 static int sync_diff;           /* audio/video frame position diff */
  51 static int sync_period;         /* sync after every this many number of frames */
  52 static int sync_since;          /* frames since th last sync */
  53 static int sync_cnt = 32;       /* synchronization steps */
  54 static int sync_cur;            /* synchronization steps left */
  55 static int sync_first;          /* first frame to record sync_diff */
  56
  57 static void stroll(void)
  58 {
  59         usleep(10000);
  60 }
  61
  62 static void draw_row(int rb, int cb, void *img, int cn)
  63 {
  64         if (rb < 0 || rb >= fb_rows())
  65                 return;
  66         if (cb < 0) {
  67                 cn = -cb < cn ? cn + cb : 0;
  68                 img += -cb;
  69                 cb = 0;
  70         }
  71         if (cb + cn >= fb_cols())
  72                 cn = cb < fb_cols() ? fb_cols() - cb : 0;
  73         fb_set(rb, cb, img, cn);
  74 }
  75
  76 static void draw_frame(void *img, int linelen)
  77 {
  78         int w, h, rn, cn, cb, rb;
  79         int i, r, c;
  80         ffs_vinfo(vffs, &w, &h);
  81         rn = h * zoom;
  82         cn = w * zoom;
  83         cb = rjust ? fb_cols() - cn * magnify + posx : posx;
  84         rb = bjust ? fb_rows() - rn * magnify + posy : posy;
  85         if (magnify == 1) {
  86                 for (r = 0; r < rn; r++)
  87                         draw_row(rb + r, cb, img + r * linelen, cn);
  88         } else {
  89                 fbval_t *brow = malloc(cn * magnify * sizeof(fbval_t));
  90                 for (r = 0; r < rn; r++) {
  91                         fbval_t *row = img + r * linelen;
  92                         for (c = 0; c < cn; c++)
  93                                 for (i = 0; i < magnify; i++)
  94                                         brow[c * magnify + i] = row[c];
  95                         for (i = 0; i < magnify; i++)
  96                                 draw_row((rb + r) * magnify + i, cb, brow, cn * magnify);
  97                 }
  98                 free(brow);
  99         }
 100 }
 101
 102 static int oss_open(void)
 103 {
 104         int rate, ch, bps;
 105         afd = open("/dev/dsp", O_WRONLY);
 106         if (afd < 0)
 107                 return 1;
 108         ffs_ainfo(affs, &rate, &bps, &ch);
 109         ioctl(afd, SOUND_PCM_WRITE_CHANNELS, &ch);
 110         ioctl(afd, SOUND_PCM_WRITE_BITS, &bps);
 111         ioctl(afd, SOUND_PCM_WRITE_RATE, &rate);
 112         return 0;
 113 }
 114
 115 static void oss_close(void)
 116 {
 117         if (afd > 0)
 118                 close(afd);
 119         afd = 0;
 120 }
 121
 122 /* audio buffers */
 123
 124 #define ABUFCNT         (1 << 3)        /* number of audio buffers */
 125 #define ABUFLEN         (1 << 18)       /* audio buffer length */
 126
 127 static int a_cons;
 128 static int a_prod;
 129 static char a_buf[ABUFCNT][ABUFLEN];
 130 static int a_len[ABUFCNT];
 131 static int a_reset;
 132
 133 static int a_conswait(void)
 134 {
 135         return a_cons == a_prod;
 136 }
 137
 138 static int a_prodwait(void)
 139 {
 140         return ((a_prod + 1) & (ABUFCNT - 1)) == a_cons;
 141 }
 142
 143 static void a_doreset(int pause)
 144 {
 145         a_reset = 1 + pause;
 146         while (audio && a_reset)
 147                 stroll();
 148 }
 149
 150 /* subtitle handling */
 151
 152 #define SUBSCNT         2048            /* number of subtitles */
 153 #define SUBSLEN         80              /* maximum subtitle length */
 154
 155 static char *sub_path;                  /* subtitles file */
 156 static char sub_text[SUBSCNT][SUBSLEN]; /* subtitle text */
 157 static long sub_beg[SUBSCNT];           /* printing position */
 158 static long sub_end[SUBSCNT];           /* hiding position */
 159 static int sub_n;                       /* subtitle count */
 160 static int sub_last;                    /* last printed subtitle */
 161
 162 static void sub_read(void)
 163 {
 164         struct ffs *sffs = ffs_alloc(sub_path, FFS_SUBTS);
 165         if (!sffs)
 166                 return;
 167         while (sub_n < SUBSCNT && !ffs_sdec(sffs, &sub_text[sub_n][0], SUBSLEN,
 168                         &sub_beg[sub_n], &sub_end[sub_n])) {
 169                 sub_n++;
 170         }
 171         ffs_free(sffs);
 172 }
 173
 174 static void sub_print(void)
 175 {
 176         struct ffs *ffs = video ? vffs : affs;
 177         int l = 0;
 178         int h = sub_n;
 179         long pos = ffs_pos(ffs);
 180         while (l < h) {
 181                 int m = (l + h) >> 1;
 182                 if (pos >= sub_beg[m] && pos <= sub_end[m]) {
 183                         if (sub_last != m)
 184                                 printf("\r\33[K%s", sub_text[m]);
 185                         sub_last = m;
 186                         fflush(stdout);
 187                         return;
 188                 }
 189                 if (pos < sub_beg[m])
 190                         h = m;
 191                 else
 192                         l = m + 1;
 193         }
 194         if (sub_last >= 0) {
 195                 printf("\r\33[K");
 196                 fflush(stdout);
 197                 sub_last = -1;
 198         }
 199 }
 200
 201 /* fbff commands */
 202
 203 static int cmdread(void)
 204 {
 205         char b;
 206         if (read(0, &b, 1) <= 0)
 207                 return -1;
 208         return b;
 209 }
 210
 211 static void cmdwait(void)
 212 {
 213         struct pollfd ufds[1];
 214         ufds[0].fd = 0;
 215         ufds[0].events = POLLIN;
 216         poll(ufds, 1, -1);
 217 }
 218
 219 static void cmdjmp(int n, int rel)
 220 {
 221         struct ffs *ffs = video ? vffs : affs;
 222         long pos = (rel ? ffs_pos(ffs) : 0) + n * 1000;
 223         a_doreset(0);
 224         sync_cur = sync_cnt;
 225         if (pos < 0)
 226                 pos = 0;
 227         if (!rel)
 228                 mark['\''] = ffs_pos(ffs);
 229         if (audio)
 230                 ffs_seek(affs, ffs, pos);
 231         if (video)
 232                 ffs_seek(vffs, ffs, pos);
 233 }
 234
 235 static void cmdinfo(void)
 236 {
 237         struct ffs *ffs = video ? vffs : affs;
 238         long pos = ffs_pos(ffs);
 239         long percent = ffs_duration(ffs) ? pos * 10 / (ffs_duration(ffs) / 100) : 0;
 240         printf("\r\33[K%c %3ld.%01ld%%  %3ld:%02ld.%01ld  (AV:%4d)     [%s] \r",
 241                 paused ? (afd < 0 ? '*' : ' ') : '>',
 242                 percent / 10, percent % 10,
 243                 pos / 60000, (pos % 60000) / 1000, (pos % 1000) / 100,
 244                 video && audio ? ffs_avdiff(vffs, affs) : 0,
 245                 filename);
 246         fflush(stdout);
 247 }
 248
 249 static int cmdarg(int def)
 250 {
 251         int n = arg;
 252         arg = 0;
 253         return n ? n : def;
 254 }
 255
 256 static void cmdexec(void)
 257 {
 258         int c;
 259         while ((c = cmdread()) >= 0) {
 260                 if (domark) {
 261                         domark = 0;
 262                         mark[c] = ffs_pos(video ? vffs : affs);
 263                         continue;
 264                 }
 265                 if (dojump) {
 266                         dojump = 0;
 267                         if (mark[c] > 0)
 268                                 cmdjmp(mark[c] / 1000, 0);
 269                         continue;
 270                 }
 271                 switch (c) {
 272                 case 'q':
 273                         exited = 1;
 274                         break;
 275                 case 'l':
 276                         cmdjmp(cmdarg(1) * 10, 1);
 277                         break;
 278                 case 'h':
 279                         cmdjmp(-cmdarg(1) * 10, 1);
 280                         break;
 281                 case 'j':
 282                         cmdjmp(cmdarg(1) * 60, 1);
 283                         break;
 284                 case 'k':
 285                         cmdjmp(-cmdarg(1) * 60, 1);
 286                         break;
 287                 case 'J':
 288                         cmdjmp(cmdarg(1) * 600, 1);
 289                         break;
 290                 case 'K':
 291                         cmdjmp(-cmdarg(1) * 600, 1);
 292                         break;
 293                 case 'G':
 294                         cmdjmp(cmdarg(0) * 60, 0);
 295                         break;
 296                 case '%':
 297                         cmdjmp(cmdarg(0) * ffs_duration(vffs ? vffs : affs) / 100000, 0);
 298                         break;
 299                 case 'm':
 300                         domark = 1;
 301                         break;
 302                 case '\'':
 303                         dojump = 1;
 304                         break;
 305                 case 'i':
 306                         cmdinfo();
 307                         break;
 308                 case ' ':
 309                 case 'p':
 310                         if (audio && paused)
 311                                 if (oss_open())
 312                                         break;
 313                         if (audio && !paused)
 314                                 oss_close();
 315                         paused = !paused;
 316                         sync_cur = sync_cnt;
 317                         break;
 318                 case '-':
 319                         sync_diff = -cmdarg(0);
 320                         break;
 321                 case '+':
 322                         sync_diff = cmdarg(0);
 323                         break;
 324                 case 'a':
 325                         sync_diff = ffs_avdiff(vffs, affs);
 326                         break;
 327                 case 'c':
 328                         sync_cnt = cmdarg(0);
 329                         break;
 330                 case 's':
 331                         sync_cur = cmdarg(sync_cnt);
 332                         break;
 333                 case 27:
 334                         arg = 0;
 335                         break;
 336                 default:
 337                         if (isdigit(c))
 338                                 arg = arg * 10 + c - '0';
 339                 }
 340         }
 341 }
 342
 343 /* return nonzero if one more video frame can be decoded */
 344 static int vsync(void)
 345 {
 346         if (sync_period && sync_since++ >= sync_period) {
 347                 sync_cur = sync_cnt;
 348                 sync_since = 0;
 349         }
 350         if (sync_first) {
 351                 sync_cur = 0;
 352                 if (sync_first < vnum) {
 353                         sync_first = 0;
 354                         sync_diff = ffs_avdiff(vffs, affs);
 355                 }
 356         }
 357         if (sync_cur > 0) {
 358                 sync_cur--;
 359                 return ffs_avdiff(vffs, affs) >= sync_diff;
 360         }
 361         ffs_wait(vffs);
 362         return 1;
 363 }
 364
 365 static void mainloop(void)
 366 {
 367         int eof = 0;
 368         while (eof < audio + video) {
 369                 cmdexec();
 370                 if (exited)
 371                         break;
 372                 if (paused) {
 373                         a_doreset(1);
 374                         cmdwait();
 375                         continue;
 376                 }
 377                 while (audio && !eof && !a_prodwait()) {
 378                         int ret = ffs_adec(affs, a_buf[a_prod], ABUFLEN);
 379                         if (ret < 0)
 380                                 eof++;
 381                         if (ret > 0) {
 382                                 a_len[a_prod] = ret;
 383                                 a_prod = (a_prod + 1) & (ABUFCNT - 1);
 384                         }
 385                 }
 386                 if (video && (!audio || eof || vsync())) {
 387                         int ignore = jump && (vnum % (jump + 1));
 388                         void *buf;
 389                         int ret = ffs_vdec(vffs, ignore ? NULL : &buf);
 390                         vnum++;
 391                         if (ret < 0)
 392                                 eof++;
 393                         if (ret > 0)
 394                                 draw_frame((void *) buf, ret);
 395                         sub_print();
 396                 } else {
 397                         stroll();
 398                 }
 399         }
 400         exited = 1;
 401 }
 402
 403 static void *process_audio(void *dat)
 404 {
 405         while (1) {
 406                 while (!a_reset && (a_conswait() || paused) && !exited)
 407                         stroll();
 408                 if (exited)
 409                         return NULL;
 410                 if (a_reset) {
 411                         if (a_reset == 1)
 412                                 a_cons = a_prod;
 413                         a_reset = 0;
 414                         continue;
 415                 }
 416                 if (afd > 0) {
 417                         write(afd, a_buf[a_cons], a_len[a_cons]);
 418                         a_cons = (a_cons + 1) & (ABUFCNT - 1);
 419                 }
 420         }
 421         return NULL;
 422 }
 423
 424 static char *usage = "usage: fbff [options] file\n"
 425         "\noptions:\n"
 426         "  -z n     zoom the video\n"
 427         "  -m n     magnify the video by duplicating pixels\n"
 428         "  -j n     jump every n video frames; for slow machines\n"
 429         "  -f       start full screen\n"
 430         "  -v n     select video stream; '-' disables video\n"
 431         "  -a n     select audio stream; '-' disables audio\n"
 432         "  -s       always synchronize (-sx for every x frames)\n"
 433         "  -u       record A/V delay after the first few frames\n"
 434         "  -t path  subtitles file\n"
 435         "  -x n     horizontal video position\n"
 436         "  -y n     vertical video position\n"
 437         "  -r       adjust the video to the right of the screen\n"
 438         "  -b       adjust the video to the bottom of the screen\n\n";
 439
 440 static void read_args(int argc, char *argv[])
 441 {
 442         int i = 1;
 443         while (i < argc) {
 444                 char *c = argv[i];
 445                 if (c[0] != '-')
 446                         break;
 447                 if (c[1] == 'm')
 448                         magnify = c[2] ? atoi(c + 2) : atoi(argv[++i]);
 449                 if (c[1] == 'z')
 450                         zoom = c[2] ? atof(c + 2) : atof(argv[++i]);
 451                 if (c[1] == 'j')
 452                         jump = c[2] ? atoi(c + 2) : atoi(argv[++i]);
 453                 if (c[1] == 'f')
 454                         fullscreen = 1;
 455                 if (c[1] == 's')
 456                         sync_period = c[2] ? atoi(c + 2) : 1;
 457                 if (c[1] == 't')
 458                         sub_path = c[2] ? c + 2 : argv[++i];
 459                 if (c[1] == 'h')
 460                         printf(usage);
 461                 if (c[1] == 'x')
 462                         posx = c[2] ? atoi(c + 2) : atoi(argv[++i]);
 463                 if (c[1] == 'y')
 464                         posy = c[2] ? atoi(c + 2) : atoi(argv[++i]);
 465                 if (c[1] == 'r')
 466                         rjust = 1;
 467                 if (c[1] == 'b')
 468                         bjust = 1;
 469                 if (c[1] == 'u')
 470                         sync_first = 32;
 471                 if (c[1] == 'v') {
 472                         char *arg = c[2] ? c + 2 : argv[++i];
 473                         video = arg[0] == '-' ? 0 : atoi(arg) + 2;
 474                 }
 475                 if (c[1] == 'a') {
 476                         char *arg = c[2] ? c + 2 : argv[++i];
 477                         audio = arg[0] == '-' ? 0 : atoi(arg) + 2;
 478                 }
 479                 i++;
 480         }
 481 }
 482
 483 static void term_init(struct termios *termios)
 484 {
 485         struct termios newtermios;
 486         tcgetattr(0, termios);
 487         newtermios = *termios;
 488         newtermios.c_lflag &= ~ICANON;
 489         newtermios.c_lflag &= ~ECHO;
 490         tcsetattr(0, TCSAFLUSH, &newtermios);
 491         fcntl(0, F_SETFL, fcntl(0, F_GETFL) | O_NONBLOCK);
 492 }
 493
 494 static void term_done(struct termios *termios)
 495 {
 496         tcsetattr(0, 0, termios);
 497 }
 498
 499 int main(int argc, char *argv[])
 500 {
 501         struct termios termios;
 502         pthread_t a_thread;
 503         char *path = argv[argc - 1];
 504         if (argc < 2) {
 505                 printf("usage: %s [-u -s60 ...] file\n", argv[0]);
 506                 return 1;
 507         }
 508         read_args(argc, argv);
 509         ffs_globinit();
 510         snprintf(filename, sizeof(filename), "%s", path);
 511         if (video && !(vffs = ffs_alloc(path, FFS_VIDEO | (video - 1))))
 512                 video = 0;
 513         if (audio && !(affs = ffs_alloc(path, FFS_AUDIO | (audio - 1))))
 514                 audio = 0;
 515         if (!video && !audio)
 516                 return 1;
 517         if (sub_path)
 518                 sub_read();
 519         if (audio) {
 520                 ffs_aconf(affs);
 521                 if (oss_open()) {
 522                         fprintf(stderr, "fbff: /dev/dsp busy?\n");
 523                         return 1;
 524                 }
 525                 pthread_create(&a_thread, NULL, process_audio, NULL);
 526         }
 527         if (video) {
 528                 int w, h;
 529                 if (fb_init())
 530                         return 1;
 531                 ffs_vinfo(vffs, &w, &h);
 532                 if (magnify != 1 && sizeof(fbval_t) != FBM_BPP(fb_mode()))
 533                         fprintf(stderr, "fbff: fbval_t does not match\n");
 534                 if (fullscreen) {
 535                         float hz = (float) fb_rows() / h / magnify;
 536                         float wz = (float) fb_cols() / w / magnify;
 537                         zoom = hz < wz ? hz : wz;
 538                 }
 539                 ffs_vconf(vffs, zoom, fb_mode());
 540         }
 541         term_init(&termios);
 542         mainloop();
 543         term_done(&termios);
 544         printf("\n");
 545
 546         if (video) {
 547                 fb_free();
 548                 ffs_free(vffs);
 549         }
 550         if (audio) {
 551                 pthread_join(a_thread, NULL);
 552                 oss_close();
 553                 ffs_free(affs);
 554         }
 555         return 0;
 556 }