fbff.c

   1 /*
   2  * fbff - a small ffmpeg-based framebuffer/oss media player
   3  *
   4  * Copyright (C) 2009-2012 Ali Gholami Rudi
   5  *
   6  * This program is released under GNU GPL version 2.
   7  */
   8 #include <fcntl.h>
   9 #include <pty.h>
  10 #include <ctype.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 "config.h"
  22 #include "ffs.h"
  23 #include "draw.h"
  24
  25 #define MIN(a, b)       ((a) < (b) ? (a) : (b))
  26 #define MAX(a, b)       ((a) > (b) ? (a) : (b))
  27
  28 static int arg;
  29 static struct termios termios;
  30 static int paused;
  31 static int exited;
  32
  33 static float zoom = 1;
  34 static int magnify = 1;
  35 static int jump = 0;
  36 static int fullscreen = 0;
  37 static int video = 1;           /* video stream; 0=none, 1=auto, >2=idx */
  38 static int audio = 1;           /* audio stream; 0=none, 1=auto, >2=idx */
  39 static int rjust = 0;           /* justify video to the right */
  40 static int bjust = 0;           /* justify video to the bottom */
  41 static int frame_jmp = 1;       /* the changes to pos_cur for each frame */
  42
  43 static struct ffs *affs;        /* audio ffmpeg stream */
  44 static struct ffs *vffs;        /* video ffmpeg stream */
  45 static int afd;                 /* oss fd */
  46 static int vnum;                /* decoded video frame count */
  47
  48 static int sync_diff;           /* audio/video frame position diff */
  49 static int sync_period;         /* sync after every this many number of frames */
  50 static int sync_since;          /* frames since th last sync */
  51 static int sync_cnt = 32;       /* synchronization steps */
  52 static int sync_cur;            /* synchronization steps left */
  53 static int sync_first;          /* first frame to record sync_diff */
  54
  55 static void stroll(void)
  56 {
  57         usleep(10000);
  58 }
  59
  60 static void draw_frame(void *img, int linelen)
  61 {
  62         int w, h;
  63         fbval_t buf[1 << 14];
  64         int nr, nc, cb, rb;
  65         int i, r, c;
  66         ffs_vinfo(vffs, &w, &h);
  67         nr = MIN(h * zoom, fb_rows() / magnify);
  68         nc = MIN(w * zoom, fb_cols() / magnify);
  69         cb = rjust ? fb_cols() - nc * magnify : 0;
  70         rb = bjust ? fb_rows() - nr * magnify : 0;
  71         for (r = 0; r < nr; r++) {
  72                 fbval_t *row = img + r * linelen;
  73                 if (magnify == 1) {
  74                         fb_set(rb + r, cb, row, nc);
  75                         continue;
  76                 }
  77                 for (c = 0; c < nc; c++)
  78                         for (i = 0; i < magnify; i++)
  79                                 buf[c * magnify + i] = row[c];
  80                 for (i = 0; i < magnify; i++)
  81                         fb_set((rb + r) * magnify + i, cb, buf, nc * magnify);
  82         }
  83 }
  84
  85 #define ABUFSZ          (1 << 18)
  86
  87 static int a_cons;
  88 static int a_prod;
  89 static char a_buf[AUDIOBUFS][ABUFSZ];
  90 static int a_len[AUDIOBUFS];
  91 static int a_reset;
  92
  93 static int a_conswait(void)
  94 {
  95         return a_cons == a_prod;
  96 }
  97
  98 static int a_prodwait(void)
  99 {
 100         return ((a_prod + 1) & (AUDIOBUFS - 1)) == a_cons;
 101 }
 102
 103 static void a_doreset(int pause)
 104 {
 105         a_reset = 1 + pause;
 106         while (audio && a_reset)
 107                 stroll();
 108 }
 109
 110 static int readkey(void)
 111 {
 112         char b;
 113         if (read(STDIN_FILENO, &b, 1) <= 0)
 114                 return -1;
 115         return b;
 116 }
 117
 118 static void waitkey(void)
 119 {
 120         struct pollfd ufds[1];
 121         ufds[0].fd = STDIN_FILENO;
 122         ufds[0].events = POLLIN;
 123         poll(ufds, 1, -1);
 124 }
 125
 126 static int ffarg(int def)
 127 {
 128         int n = arg;
 129         arg = 0;
 130         return n ? n : def;
 131 }
 132
 133 static void ffjmp(int n, int rel)
 134 {
 135         struct ffs *ffs = video ? vffs : affs;
 136         long pos = ffs_pos(ffs, n);
 137         a_doreset(0);
 138         sync_cur = sync_cnt;
 139         if (audio)
 140                 ffs_seek(affs, pos, frame_jmp);
 141         if (video)
 142                 ffs_seek(vffs, pos, frame_jmp);
 143 }
 144
 145 static void printinfo(void)
 146 {
 147         struct ffs *ffs = video ? vffs : affs;
 148         printf("fbff:   %8lx \t (AV: %d)\r",
 149                 ffs_pos(ffs, 0), video && audio ? ffs_avdiff(vffs, affs) : 0);
 150         fflush(stdout);
 151 }
 152
 153 #define JMP1            (1 << 5)
 154 #define JMP2            (JMP1 << 3)
 155 #define JMP3            (JMP2 << 5)
 156
 157 static void execkey(void)
 158 {
 159         int c;
 160         while ((c = readkey()) != -1) {
 161                 switch (c) {
 162                 case 'q':
 163                         exited = 1;
 164                         break;
 165                 case 'l':
 166                         ffjmp(ffarg(1) * JMP1, 1);
 167                         break;
 168                 case 'h':
 169                         ffjmp(-ffarg(1) * JMP1, 1);
 170                         break;
 171                 case 'j':
 172                         ffjmp(ffarg(1) * JMP2, 1);
 173                         break;
 174                 case 'k':
 175                         ffjmp(-ffarg(1) * JMP2, 1);
 176                         break;
 177                 case 'J':
 178                         ffjmp(ffarg(1) * JMP3, 1);
 179                         break;
 180                 case 'K':
 181                         ffjmp(-ffarg(1) * JMP3, 1);
 182                         break;
 183                 case '%':
 184                         if (arg)
 185                                 ffjmp(100, 0);
 186                         break;
 187                 case 'i':
 188                         printinfo();
 189                         break;
 190                 case ' ':
 191                 case 'p':
 192                         paused = !paused;
 193                         sync_cur = sync_cnt;
 194                         break;
 195                 case '-':
 196                         sync_diff = -ffarg(0);
 197                         break;
 198                 case '+':
 199                         sync_diff = ffarg(0);
 200                         break;
 201                 case 'a':
 202                         sync_diff = ffs_avdiff(vffs, affs);
 203                         break;
 204                 case 'c':
 205                         sync_cnt = ffarg(0);
 206                         break;
 207                 case 's':
 208                         sync_cur = ffarg(sync_cnt);
 209                         break;
 210                 case 27:
 211                         arg = 0;
 212                         break;
 213                 default:
 214                         if (isdigit(c))
 215                                 arg = arg * 10 + c - '0';
 216                 }
 217         }
 218 }
 219
 220 /* return nonzero if one more video frame can be decoded */
 221 static int vsync(void)
 222 {
 223         if (sync_period && sync_since++ >= sync_period) {
 224                 sync_cur = sync_cnt;
 225                 sync_since = 0;
 226         }
 227         if (sync_first) {
 228                 sync_cur = 0;
 229                 if (sync_first < vnum) {
 230                         sync_first = 0;
 231                         sync_diff = ffs_avdiff(vffs, affs);
 232                 }
 233         }
 234         if (sync_cur > 0) {
 235                 sync_cur--;
 236                 return ffs_avdiff(vffs, affs) >= sync_diff;
 237         }
 238         ffs_wait(vffs);
 239         return 1;
 240 }
 241
 242 static void mainloop(void)
 243 {
 244         int eof = 0;
 245         while (eof < audio + video) {
 246                 execkey();
 247                 if (exited)
 248                         break;
 249                 if (paused) {
 250                         a_doreset(1);
 251                         waitkey();
 252                         continue;
 253                 }
 254                 while (audio && !eof && !a_prodwait()) {
 255                         int ret = ffs_adec(affs, a_buf[a_prod], ABUFSZ);
 256                         if (ret < 0)
 257                                 eof++;
 258                         if (ret > 0) {
 259                                 a_len[a_prod] = ret;
 260                                 a_prod = (a_prod + 1) & (AUDIOBUFS - 1);
 261                         }
 262                 }
 263                 if (video && (!audio || eof || vsync())) {
 264                         int ignore = jump && (vnum % (jump + 1));
 265                         void *buf;
 266                         int ret = ffs_vdec(vffs, ignore ? NULL : &buf);
 267                         vnum++;
 268                         if (ret < 0)
 269                                 eof++;
 270                         if (ret > 0)
 271                                 draw_frame((void *) buf, ret);
 272                 } else {
 273                         stroll();
 274                 }
 275         }
 276         exited = 1;
 277 }
 278
 279 static void oss_init(void)
 280 {
 281         int rate, ch, bps;
 282         afd = open("/dev/dsp", O_RDWR);
 283         if (afd < 0) {
 284                 fprintf(stderr, "cannot open /dev/dsp\n");
 285                 exit(1);
 286         }
 287         ffs_ainfo(affs, &rate, &bps, &ch);
 288         ioctl(afd, SOUND_PCM_WRITE_RATE, &rate);
 289         ioctl(afd, SOUND_PCM_WRITE_CHANNELS, &ch);
 290         ioctl(afd, SOUND_PCM_WRITE_BITS, &bps);
 291 }
 292
 293 static void oss_close(void)
 294 {
 295         close(afd);
 296 }
 297
 298 static void *process_audio(void *dat)
 299 {
 300         oss_init();
 301         while (1) {
 302                 while (!a_reset && (a_conswait() || paused) && !exited)
 303                         stroll();
 304                 if (exited)
 305                         goto ret;
 306                 if (a_reset) {
 307                         if (a_reset == 1)
 308                                 a_cons = a_prod;
 309                         a_reset = 0;
 310                         continue;
 311                 }
 312                 write(afd, a_buf[a_cons], a_len[a_cons]);
 313                 a_cons = (a_cons + 1) & (AUDIOBUFS - 1);
 314         }
 315 ret:
 316         oss_close();
 317         return NULL;
 318 }
 319
 320 static void term_setup(void)
 321 {
 322         struct termios newtermios;
 323         tcgetattr(STDIN_FILENO, &termios);
 324         newtermios = termios;
 325         newtermios.c_lflag &= ~ICANON;
 326         newtermios.c_lflag &= ~ECHO;
 327         tcsetattr(STDIN_FILENO, TCSAFLUSH, &newtermios);
 328         fcntl(STDIN_FILENO, F_SETFL, fcntl(STDIN_FILENO, F_GETFL) | O_NONBLOCK);
 329 }
 330
 331 static void term_cleanup(void)
 332 {
 333         tcsetattr(STDIN_FILENO, 0, &termios);
 334 }
 335
 336 static void sigcont(int sig)
 337 {
 338         term_setup();
 339 }
 340
 341 static char *usage = "usage: fbff [options] file\n"
 342         "\noptions:\n"
 343         "  -z x     zoom the screen using ffmpeg\n"
 344         "  -m x     magnify the screen by repeating pixels\n"
 345         "  -j x     jump every x video frames; for slow machines\n"
 346         "  -f       start full screen\n"
 347         "  -v x     select video stream; '-' disables video\n"
 348         "  -a x     select audio stream; '-' disables audio\n"
 349         "  -s       always synchronize; useful for files with bad video framerate\n"
 350         "  -u       record avdiff after a few frames\n"
 351         "  -t       use time based seeking; only if the default does't work\n"
 352         "  -r       adjust the video to the right of the screen\n"
 353         "  -b       adjust the video to the bottom of the screen\n\n";
 354
 355 static void read_args(int argc, char *argv[])
 356 {
 357         int i = 1;
 358         while (i < argc) {
 359                 char *c = argv[i];
 360                 if (c[0] != '-')
 361                         break;
 362                 if (c[1] == 'm')
 363                         magnify = c[2] ? atoi(c + 2) : atoi(argv[++i]);
 364                 if (c[1] == 'z')
 365                         zoom = c[2] ? atof(c + 2) : atof(argv[++i]);
 366                 if (c[1] == 'j')
 367                         jump = c[2] ? atoi(c + 2) : atoi(argv[++i]);
 368                 if (c[1] == 'f')
 369                         fullscreen = 1;
 370                 if (c[1] == 's')
 371                         sync_period = c[2] ? atoi(c + 2) : 1;
 372                 if (c[1] == 't')
 373                         frame_jmp = 1024;
 374                 if (c[1] == 'h')
 375                         printf(usage);
 376                 if (c[1] == 'r')
 377                         rjust = 1;
 378                 if (c[1] == 'b')
 379                         bjust = 1;
 380                 if (c[1] == 'u')
 381                         sync_first = 32;
 382                 if (c[1] == 'v') {
 383                         char *arg = c[2] ? c + 2 : argv[++i];
 384                         video = arg[0] == '-' ? 0 : atoi(arg) + 2;
 385                 }
 386                 if (c[1] == 'a') {
 387                         char *arg = c[2] ? c + 2 : argv[++i];
 388                         audio = arg[0] == '-' ? 0 : atoi(arg) + 2;
 389                 }
 390                 i++;
 391         }
 392 }
 393
 394 int main(int argc, char *argv[])
 395 {
 396         pthread_t a_thread;
 397         char *path = argv[argc - 1];
 398         if (argc < 2) {
 399                 printf("usage: %s [options] filename\n", argv[0]);
 400                 return 1;
 401         }
 402         read_args(argc, argv);
 403         ffs_globinit();
 404         if (video && !(vffs = ffs_alloc(path, FFS_VIDEO | (video - 1))))
 405                 video = 0;
 406         if (audio && !(affs = ffs_alloc(path, FFS_AUDIO | (audio - 1))))
 407                 audio = 0;
 408         if (!video && !audio)
 409                 return 1;
 410         if (audio)
 411                 pthread_create(&a_thread, NULL, process_audio, NULL);
 412         if (video) {
 413                 int w, h;
 414                 if (fb_init())
 415                         return 1;
 416                 ffs_vinfo(vffs, &w, &h);
 417                 if (magnify != 1 && sizeof(fbval_t) != FBM_BPP(fb_mode()))
 418                         fprintf(stderr, "fbff: magnify != 1 and fbval_t doesn't match\n");
 419                 if (fullscreen) {
 420                         float hz = (float) fb_rows() / h / magnify;
 421                         float wz = (float) fb_cols() / w / magnify;
 422                         zoom = hz < wz ? hz : wz;
 423                 }
 424                 ffs_vsetup(vffs, zoom, fb_mode());
 425         }
 426         term_setup();
 427         signal(SIGCONT, sigcont);
 428         mainloop();
 429         term_cleanup();
 430
 431         if (video) {
 432                 fb_free();
 433                 ffs_free(vffs);
 434         }
 435         if (audio) {
 436                 pthread_join(a_thread, NULL);
 437                 ffs_free(affs);
 438         }
 439         return 0;
 440 }