fbff.c

   1 /*
   2  * fbff - a small ffmpeg-based framebuffer/oss media player
   3  *
   4  * Copyright (C) 2009-2021 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 <signal.h>
  12 #include <stdint.h>
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15 #include <string.h>
  16 #include <termios.h>
  17 #include <unistd.h>
  18 #include <sys/poll.h>
  19 #include <sys/soundcard.h>
  20 #include <pthread.h>
  21 #include "ffs.h"
  22 #include "draw.h"
  23
  24 #define MIN(a, b)       ((a) < (b) ? (a) : (b))
  25 #define MAX(a, b)       ((a) > (b) ? (a) : (b))
  26
  27 static int paused;
  28 static int exited;
  29 static int domark;
  30 static int dojump;
  31 static int arg;
  32 static char filename[32];
  33
  34 static float zoom = 1;
  35 static int magnify = 1;
  36 static int jump = 0;
  37 static int fullscreen = 0;
  38 static int video = 1;           /* video stream; 0:none, 1:auto, >1:idx */
  39 static int audio = 1;           /* audio stream; 0:none, 1:auto, >1:idx */
  40 static int posx, posy;          /* video position */
  41 static int rjust, bjust;        /* justify video to screen right/bottom */
  42 static int nodraw;              /* stop drawing */
  43 static char *ossdsp;            /* OSS device */
  44
  45 static struct ffs *affs;        /* audio ffmpeg stream */
  46 static struct ffs *vffs;        /* video ffmpeg stream */
  47 static int afd;                 /* oss fd */
  48 static int vnum;                /* decoded video frame count */
  49 static long mark[256];          /* marks */
  50
  51 static int sync_diff;           /* audio/video frame position diff */
  52 static int sync_period;         /* sync after every this many number of frames */
  53 static int sync_since;          /* frames since th last sync */
  54 static int sync_cnt = 32;       /* synchronization steps */
  55 static int sync_cur;            /* synchronization steps left */
  56 static int sync_first;          /* first frame to record sync_diff */
  57
  58 static void stroll(void)
  59 {
  60         usleep(10000);
  61 }
  62
  63 static void draw_row(int rb, int cb, void *img, int cn)
  64 {
  65         int bpp = FBM_BPP(fb_mode());
  66         if (rb < 0 || rb >= fb_rows())
  67                 return;
  68         if (cb < 0) {
  69                 cn = -cb < cn ? cn + cb : 0;
  70                 img += -cb;
  71                 cb = 0;
  72         }
  73         if (cb + cn >= fb_cols())
  74                 cn = cb < fb_cols() ? fb_cols() - cb : 0;
  75         memcpy(fb_mem(rb) + cb * bpp, img, cn * bpp);
  76 }
  77
  78 static void draw_frame(void *img, int linelen)
  79 {
  80         int w, h, rn, cn, cb, rb;
  81         int i, r, c, k;
  82         int bpp = FBM_BPP(fb_mode());
  83         if (nodraw)
  84                 return;
  85         ffs_vinfo(vffs, &w, &h);
  86         rn = h * zoom;
  87         cn = w * zoom;
  88         cb = rjust ? fb_cols() - cn * magnify + posx : posx;
  89         rb = bjust ? fb_rows() - rn * magnify + posy : posy;
  90         if (magnify == 1) {
  91                 for (r = 0; r < rn; r++)
  92                         draw_row(rb + r, cb, img + r * linelen, cn);
  93         } else {
  94                 char *brow = malloc(cn * magnify * bpp);
  95                 for (r = 0; r < rn; r++) {
  96                         char *src = img + r * linelen;
  97                         char *dst = brow;
  98                         for (c = 0; c < cn; c++)
  99                                 for (i = 0; i < magnify; i++)
 100                                         for (k = 0; k < bpp; k++)
 101                                                 *dst++ = src[c * bpp + k];
 102                         for (i = 0; i < magnify; i++)
 103                                 draw_row((rb + r) * magnify + i, cb, brow, cn * magnify);
 104                 }
 105                 free(brow);
 106         }
 107 }
 108
 109 static int oss_open(void)
 110 {
 111         int rate, ch, bps;
 112         int frag = 0x0003000b;  /* 0xmmmmssss: 2^m fragments of size 2^s each */
 113         afd = open(ossdsp ? ossdsp : "/dev/dsp", O_WRONLY);
 114         if (afd < 0)
 115                 return 1;
 116         ffs_ainfo(affs, &rate, &bps, &ch);
 117         ioctl(afd, SOUND_PCM_WRITE_CHANNELS, &ch);
 118         ioctl(afd, SOUND_PCM_WRITE_BITS, &bps);
 119         ioctl(afd, SOUND_PCM_WRITE_RATE, &rate);
 120         ioctl(afd, SOUND_PCM_SETFRAGMENT, &frag);
 121         return 0;
 122 }
 123
 124 static void oss_close(void)
 125 {
 126         if (afd > 0)
 127                 close(afd);
 128         afd = 0;
 129 }
 130
 131 /* audio buffers */
 132
 133 #define ABUFCNT         (1 << 3)        /* number of audio buffers */
 134 #define ABUFLEN         (1 << 18)       /* audio buffer length */
 135
 136 static int a_cons;
 137 static int a_prod;
 138 static char a_buf[ABUFCNT][ABUFLEN];
 139 static int a_len[ABUFCNT];
 140 static int a_reset;
 141
 142 static int a_conswait(void)
 143 {
 144         return a_cons == a_prod;
 145 }
 146
 147 static int a_prodwait(void)
 148 {
 149         return ((a_prod + 1) & (ABUFCNT - 1)) == a_cons;
 150 }
 151
 152 static void a_doreset(int pause)
 153 {
 154         a_reset = 1 + pause;
 155         while (audio && a_reset)
 156                 stroll();
 157 }
 158
 159 /* subtitle handling */
 160
 161 #define SUBSCNT         2048            /* number of subtitles */
 162 #define SUBSLEN         80              /* maximum subtitle length */
 163
 164 static char *sub_path;                  /* subtitles file */
 165 static char sub_text[SUBSCNT][SUBSLEN]; /* subtitle text */
 166 static long sub_beg[SUBSCNT];           /* printing position */
 167 static long sub_end[SUBSCNT];           /* hiding position */
 168 static int sub_n;                       /* subtitle count */
 169 static int sub_last;                    /* last printed subtitle */
 170
 171 static void sub_read(void)
 172 {
 173         struct ffs *sffs = ffs_alloc(sub_path, FFS_SUBTS);
 174         if (!sffs)
 175                 return;
 176         while (sub_n < SUBSCNT && !ffs_sdec(sffs, sub_text[sub_n], SUBSLEN,
 177                         &sub_beg[sub_n], &sub_end[sub_n])) {
 178                 sub_n++;
 179         }
 180         ffs_free(sffs);
 181 }
 182
 183 static void sub_print(void)
 184 {
 185         struct ffs *ffs = video ? vffs : affs;
 186         int l = 0;
 187         int h = sub_n;
 188         long pos = ffs_pos(ffs);
 189         while (l < h) {
 190                 int m = (l + h) >> 1;
 191                 if (pos >= sub_beg[m] && pos <= sub_end[m]) {
 192                         if (sub_last != m)
 193                                 printf("\r\33[K%s", sub_text[m]);
 194                         sub_last = m;
 195                         fflush(stdout);
 196                         return;
 197                 }
 198                 if (pos < sub_beg[m])
 199                         h = m;
 200                 else
 201                         l = m + 1;
 202         }
 203         if (sub_last >= 0) {
 204                 printf("\r\33[K");
 205                 fflush(stdout);
 206                 sub_last = -1;
 207         }
 208 }
 209
 210 /* fbff commands */
 211
 212 static int cmdread(void)
 213 {
 214         char b;
 215         if (read(0, &b, 1) <= 0)
 216                 return -1;
 217         return b;
 218 }
 219
 220 static void cmdwait(void)
 221 {
 222         struct pollfd ufds[1];
 223         ufds[0].fd = 0;
 224         ufds[0].events = POLLIN;
 225         poll(ufds, 1, -1);
 226 }
 227
 228 static void cmdjmp(int n, int rel)
 229 {
 230         struct ffs *ffs = video ? vffs : affs;
 231         long pos = (rel ? ffs_pos(ffs) : 0) + n * 1000;
 232         a_doreset(0);
 233         sync_cur = sync_cnt;
 234         if (pos < 0)
 235                 pos = 0;
 236         if (!rel)
 237                 mark['\''] = ffs_pos(ffs);
 238         if (audio)
 239                 ffs_seek(affs, ffs, pos);
 240         if (video)
 241                 ffs_seek(vffs, ffs, pos);
 242 }
 243
 244 static void cmdinfo(void)
 245 {
 246         struct ffs *ffs = video ? vffs : affs;
 247         long pos = ffs_pos(ffs);
 248         long percent = ffs_duration(ffs) ? pos * 10 / (ffs_duration(ffs) / 100) : 0;
 249         printf("\r\33[K%c %3ld.%01ld%%  %3ld:%02ld.%01ld  (AV:%4d)     [%s] \r",
 250                 paused ? (afd < 0 ? '*' : ' ') : '>',
 251                 percent / 10, percent % 10,
 252                 pos / 60000, (pos % 60000) / 1000, (pos % 1000) / 100,
 253                 video && audio ? ffs_avdiff(vffs, affs) : 0,
 254                 filename);
 255         fflush(stdout);
 256 }
 257
 258 static int cmdarg(int def)
 259 {
 260         int n = arg;
 261         arg = 0;
 262         return n ? n : def;
 263 }
 264
 265 static void cmdexec(void)
 266 {
 267         int c;
 268         while ((c = cmdread()) >= 0) {
 269                 if (domark) {
 270                         domark = 0;
 271                         mark[c] = ffs_pos(video ? vffs : affs);
 272                         continue;
 273                 }
 274                 if (dojump) {
 275                         dojump = 0;
 276                         if (mark[c] > 0)
 277                                 cmdjmp(mark[c] / 1000, 0);
 278                         continue;
 279                 }
 280                 switch (c) {
 281                 case 'q':
 282                         exited = 1;
 283                         break;
 284                 case 'l':
 285                         cmdjmp(cmdarg(1) * 10, 1);
 286                         break;
 287                 case 'h':
 288                         cmdjmp(-cmdarg(1) * 10, 1);
 289                         break;
 290                 case 'j':
 291                         cmdjmp(cmdarg(1) * 60, 1);
 292                         break;
 293                 case 'k':
 294                         cmdjmp(-cmdarg(1) * 60, 1);
 295                         break;
 296                 case 'J':
 297                         cmdjmp(cmdarg(1) * 600, 1);
 298                         break;
 299                 case 'K':
 300                         cmdjmp(-cmdarg(1) * 600, 1);
 301                         break;
 302                 case 'G':
 303                         cmdjmp(cmdarg(0) * 60, 0);
 304                         break;
 305                 case '%':
 306                         cmdjmp(cmdarg(0) * ffs_duration(vffs ? vffs : affs) / 100000, 0);
 307                         break;
 308                 case 'm':
 309                         domark = 1;
 310                         break;
 311                 case '\'':
 312                         dojump = 1;
 313                         break;
 314                 case 'i':
 315                         cmdinfo();
 316                         break;
 317                 case ' ':
 318                 case 'p':
 319                         if (audio && paused)
 320                                 if (oss_open())
 321                                         break;
 322                         if (audio && !paused)
 323                                 oss_close();
 324                         paused = !paused;
 325                         sync_cur = sync_cnt;
 326                         break;
 327                 case '-':
 328                         sync_diff = -cmdarg(0);
 329                         break;
 330                 case '+':
 331                         sync_diff = cmdarg(0);
 332                         break;
 333                 case 'a':
 334                         sync_diff = ffs_avdiff(vffs, affs);
 335                         break;
 336                 case 'c':
 337                         sync_cnt = cmdarg(0);
 338                         break;
 339                 case 's':
 340                         sync_cur = cmdarg(sync_cnt);
 341                         break;
 342                 case 27:
 343                         arg = 0;
 344                         break;
 345                 default:
 346                         if (isdigit(c))
 347                                 arg = arg * 10 + c - '0';
 348                 }
 349         }
 350 }
 351
 352 /* return nonzero if one more video frame can be decoded */
 353 static int vsync(void)
 354 {
 355         if (sync_period && sync_since++ >= sync_period) {
 356                 sync_cur = sync_cnt;
 357                 sync_since = 0;
 358         }
 359         if (sync_first) {
 360                 sync_cur = 0;
 361                 if (sync_first < vnum) {
 362                         sync_first = 0;
 363                         sync_diff = ffs_avdiff(vffs, affs);
 364                 }
 365         }
 366         if (sync_cur > 0) {
 367                 sync_cur--;
 368                 return ffs_avdiff(vffs, affs) >= sync_diff;
 369         }
 370         ffs_wait(vffs);
 371         return 1;
 372 }
 373
 374 static void mainloop(void)
 375 {
 376         int eof = 0;
 377         while (eof < audio + video) {
 378                 cmdexec();
 379                 if (exited)
 380                         break;
 381                 if (paused) {
 382                         a_doreset(1);
 383                         cmdwait();
 384                         continue;
 385                 }
 386                 while (audio && !eof && !a_prodwait()) {
 387                         int ret = ffs_adec(affs, a_buf[a_prod], ABUFLEN);
 388                         if (ret < 0)
 389                                 eof++;
 390                         if (ret > 0) {
 391                                 a_len[a_prod] = ret;
 392                                 a_prod = (a_prod + 1) & (ABUFCNT - 1);
 393                         }
 394                 }
 395                 if (video && (!audio || eof || vsync())) {
 396                         int ignore = jump && (vnum % (jump + 1));
 397                         void *buf;
 398                         int ret = ffs_vdec(vffs, ignore ? NULL : &buf);
 399                         vnum++;
 400                         if (ret < 0)
 401                                 eof++;
 402                         if (ret > 0)
 403                                 draw_frame((void *) buf, ret);
 404                         sub_print();
 405                 } else {
 406                         stroll();
 407                 }
 408         }
 409         exited = 1;
 410 }
 411
 412 static void *process_audio(void *dat)
 413 {
 414         while (1) {
 415                 while (!a_reset && (a_conswait() || paused) && !exited)
 416                         stroll();
 417                 if (exited)
 418                         return NULL;
 419                 if (a_reset) {
 420                         if (a_reset == 1)
 421                                 a_cons = a_prod;
 422                         a_reset = 0;
 423                         continue;
 424                 }
 425                 if (afd > 0) {
 426                         write(afd, a_buf[a_cons], a_len[a_cons]);
 427                         a_cons = (a_cons + 1) & (ABUFCNT - 1);
 428                 }
 429         }
 430         return NULL;
 431 }
 432
 433 static char *usage = "usage: fbff [options] file\n"
 434         "\noptions:\n"
 435         "  -z n     zoom the video\n"
 436         "  -m n     magnify the video by duplicating pixels\n"
 437         "  -j n     jump every n video frames; for slow machines\n"
 438         "  -f       start full screen\n"
 439         "  -v n     select video stream; '-' disables video\n"
 440         "  -a n     select audio stream; '-' disables audio\n"
 441         "  -s       always synchronize (-sx for every x frames)\n"
 442         "  -u       record A/V delay after the first few frames\n"
 443         "  -t path  subtitles file\n"
 444         "  -x n     horizontal video position\n"
 445         "  -y n     vertical video position\n"
 446         "  -r       adjust the video to the right of the screen\n"
 447         "  -b       adjust the video to the bottom of the screen\n\n";
 448
 449 static void read_args(int argc, char *argv[])
 450 {
 451         int i = 1;
 452         while (i < argc) {
 453                 char *c = argv[i];
 454                 if (c[0] != '-')
 455                         break;
 456                 if (c[1] == 'm')
 457                         magnify = c[2] ? atoi(c + 2) : atoi(argv[++i]);
 458                 if (c[1] == 'z')
 459                         zoom = c[2] ? atof(c + 2) : atof(argv[++i]);
 460                 if (c[1] == 'j')
 461                         jump = c[2] ? atoi(c + 2) : atoi(argv[++i]);
 462                 if (c[1] == 'f')
 463                         fullscreen = 1;
 464                 if (c[1] == 's')
 465                         sync_period = c[2] ? atoi(c + 2) : 1;
 466                 if (c[1] == 't')
 467                         sub_path = c[2] ? c + 2 : argv[++i];
 468                 if (c[1] == 'h')
 469                         printf(usage);
 470                 if (c[1] == 'x')
 471                         posx = c[2] ? atoi(c + 2) : atoi(argv[++i]);
 472                 if (c[1] == 'y')
 473                         posy = c[2] ? atoi(c + 2) : atoi(argv[++i]);
 474                 if (c[1] == 'r')
 475                         rjust = 1;
 476                 if (c[1] == 'b')
 477                         bjust = 1;
 478                 if (c[1] == 'u')
 479                         sync_first = 32;
 480                 if (c[1] == 'v') {
 481                         char *arg = c[2] ? c + 2 : argv[++i];
 482                         video = arg[0] == '-' ? 0 : atoi(arg) + 2;
 483                 }
 484                 if (c[1] == 'a') {
 485                         char *arg = c[2] ? c + 2 : argv[++i];
 486                         audio = arg[0] == '-' ? 0 : atoi(arg) + 2;
 487                 }
 488                 i++;
 489         }
 490 }
 491
 492 static void term_init(struct termios *termios)
 493 {
 494         struct termios newtermios;
 495         tcgetattr(0, termios);
 496         newtermios = *termios;
 497         newtermios.c_lflag &= ~ICANON;
 498         newtermios.c_lflag &= ~ECHO;
 499         tcsetattr(0, TCSAFLUSH, &newtermios);
 500         fcntl(0, F_SETFL, fcntl(0, F_GETFL) | O_NONBLOCK);
 501 }
 502
 503 static void term_done(struct termios *termios)
 504 {
 505         tcsetattr(0, 0, termios);
 506 }
 507
 508 static void signalreceived(int sig)
 509 {
 510         if (sig == SIGUSR1)
 511                 nodraw = 1;
 512         if (sig == SIGUSR2)
 513                 nodraw = 0;
 514 }
 515
 516 int main(int argc, char *argv[])
 517 {
 518         struct termios termios;
 519         pthread_t a_thread;
 520         char *path = argv[argc - 1];
 521         char *fbdev = getenv("FBDEV");
 522         if (argc < 2) {
 523                 printf("usage: %s [-u -s60 ...] file\n", argv[0]);
 524                 return 1;
 525         }
 526         ossdsp = getenv("OSSDSP");
 527         read_args(argc, argv);
 528         ffs_globinit();
 529         snprintf(filename, sizeof(filename), "%s", path);
 530         if (video && !(vffs = ffs_alloc(path, FFS_VIDEO | (video - 1))))
 531                 video = 0;
 532         if (audio && !(affs = ffs_alloc(path, FFS_AUDIO | (audio - 1))))
 533                 audio = 0;
 534         if (!video && !audio)
 535                 return 1;
 536         if (sub_path)
 537                 sub_read();
 538         if (audio) {
 539                 ffs_aconf(affs);
 540                 if (oss_open()) {
 541                         fprintf(stderr, "fbff: /dev/dsp busy?\n");
 542                         return 1;
 543                 }
 544                 pthread_create(&a_thread, NULL, process_audio, NULL);
 545         }
 546         if (video) {
 547                 int w, h;
 548                 if (fb_init(fbdev))
 549                         return 1;
 550                 ffs_vinfo(vffs, &w, &h);
 551                 if (fullscreen) {
 552                         float hz = (float) fb_rows() / h / magnify;
 553                         float wz = (float) fb_cols() / w / magnify;
 554                         zoom = hz < wz ? hz : wz;
 555                 }
 556                 ffs_vconf(vffs, zoom, fb_mode());
 557         }
 558         if (getenv("TERM_PGID") != NULL && atoi(getenv("TERM_PGID")) == getppid())
 559                 if (tcsetpgrp(0, getppid()) == 0)
 560                         setpgid(0, getppid());
 561         term_init(&termios);
 562         signal(SIGUSR1, signalreceived);
 563         signal(SIGUSR2, signalreceived);
 564         mainloop();
 565         term_done(&termios);
 566         printf("\n");
 567
 568         if (video) {
 569                 fb_free();
 570                 ffs_free(vffs);
 571         }
 572         if (audio) {
 573                 pthread_join(a_thread, NULL);
 574                 oss_close();
 575                 ffs_free(affs);
 576         }
 577         return 0;
 578 }