fbff.c

   1 /*
   2  * fbff - a small ffmpeg-based framebuffer/oss media player
   3  *
   4  * Copyright (C) 2009-2011 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 just = 0;
  40 static int frame_jmp = 1;       /* the changes to pos_cur for each frame */
  41
  42 static struct ffs *affs;        /* audio ffmpeg stream */
  43 static struct ffs *vffs;        /* video ffmpeg stream */
  44 static int afd;                 /* oss fd */
  45 static int vnum;                /* decoded video frame count */
  46
  47 static int sync_diff;           /* audio/video frame position diff */
  48 static int sync_cnt = 32;       /* synchronization steps */
  49 static int sync_cur;            /* synchronization steps left */
  50
  51 static void stroll(void)
  52 {
  53         usleep(10000);
  54 }
  55
  56 static void draw_frame(void *img, int linelen)
  57 {
  58         int w, h;
  59         fbval_t buf[1 << 14];
  60         int nr, nc, cb;
  61         int i, r, c;
  62         ffs_vinfo(vffs, &w, &h);
  63         nr = MIN(h * zoom, fb_rows() / magnify);
  64         nc = MIN(w * zoom, fb_cols() / magnify);
  65         cb = just ? fb_cols() - nc * magnify : 0;
  66         for (r = 0; r < nr; r++) {
  67                 fbval_t *row = img + r * linelen;
  68                 if (magnify == 1) {
  69                         fb_set(r, cb, row, nc);
  70                         continue;
  71                 }
  72                 for (c = 0; c < nc; c++)
  73                         for (i = 0; i < magnify; i++)
  74                                 buf[c * magnify + i] = row[c];
  75                 for (i = 0; i < magnify; i++)
  76                         fb_set(r * magnify + i, cb, buf, nc * magnify);
  77         }
  78 }
  79
  80 #define ABUFSZ          (1 << 18)
  81
  82 static int a_cons;
  83 static int a_prod;
  84 static char a_buf[AUDIOBUFS][ABUFSZ];
  85 static int a_len[AUDIOBUFS];
  86 static int a_reset;
  87
  88 static int a_conswait(void)
  89 {
  90         return a_cons == a_prod;
  91 }
  92
  93 static int a_prodwait(void)
  94 {
  95         return ((a_prod + 1) & (AUDIOBUFS - 1)) == a_cons;
  96 }
  97
  98 static void a_doreset(int pause)
  99 {
 100         a_reset = 1 + pause;
 101         while (audio && a_reset)
 102                 stroll();
 103 }
 104
 105 static int readkey(void)
 106 {
 107         char b;
 108         if (read(STDIN_FILENO, &b, 1) <= 0)
 109                 return -1;
 110         return b;
 111 }
 112
 113 static void waitkey(void)
 114 {
 115         struct pollfd ufds[1];
 116         ufds[0].fd = STDIN_FILENO;
 117         ufds[0].events = POLLIN;
 118         poll(ufds, 1, -1);
 119 }
 120
 121 static int ffarg(int def)
 122 {
 123         int n = arg;
 124         arg = 0;
 125         return n ? n : def;
 126 }
 127
 128 static void ffjmp(int n, int rel)
 129 {
 130         struct ffs *ffs = video ? vffs : affs;
 131         long pos = ffs_pos(ffs, n);
 132         a_doreset(0);
 133         sync_cur = sync_cnt;
 134         if (audio)
 135                 ffs_seek(affs, pos, frame_jmp);
 136         if (video)
 137                 ffs_seek(vffs, pos, frame_jmp);
 138 }
 139
 140 static void printinfo(void)
 141 {
 142         struct ffs *ffs = video ? vffs : affs;
 143         printf("fbff:   %8lx \t (AV: %d)\r",
 144                 ffs_pos(ffs, 0), video && audio ? ffs_avdiff(vffs, affs) : 0);
 145         fflush(stdout);
 146 }
 147
 148 #define JMP1            (1 << 5)
 149 #define JMP2            (JMP1 << 3)
 150 #define JMP3            (JMP2 << 5)
 151
 152 static void execkey(void)
 153 {
 154         int c;
 155         while ((c = readkey()) != -1) {
 156                 switch (c) {
 157                 case 'q':
 158                         exited = 1;
 159                         break;
 160                 case 'l':
 161                         ffjmp(ffarg(1) * JMP1, 1);
 162                         break;
 163                 case 'h':
 164                         ffjmp(-ffarg(1) * JMP1, 1);
 165                         break;
 166                 case 'j':
 167                         ffjmp(ffarg(1) * JMP2, 1);
 168                         break;
 169                 case 'k':
 170                         ffjmp(-ffarg(1) * JMP2, 1);
 171                         break;
 172                 case 'J':
 173                         ffjmp(ffarg(1) * JMP3, 1);
 174                         break;
 175                 case 'K':
 176                         ffjmp(-ffarg(1) * JMP3, 1);
 177                         break;
 178                 case '%':
 179                         if (arg)
 180                                 ffjmp(100, 0);
 181                         break;
 182                 case 'i':
 183                         printinfo();
 184                         break;
 185                 case ' ':
 186                 case 'p':
 187                         paused = !paused;
 188                         sync_cur = sync_cnt;
 189                         break;
 190                 case '-':
 191                         sync_diff = -ffarg(0);
 192                         break;
 193                 case '+':
 194                         sync_diff = ffarg(0);
 195                         break;
 196                 case 'a':
 197                         sync_diff = ffs_avdiff(vffs, affs);
 198                         break;
 199                 case 'c':
 200                         sync_cnt = ffarg(0);
 201                         break;
 202                 case 's':
 203                         sync_cur = ffarg(sync_cnt);
 204                         break;
 205                 case 27:
 206                         arg = 0;
 207                         break;
 208                 default:
 209                         if (isdigit(c))
 210                                 arg = arg * 10 + c - '0';
 211                 }
 212         }
 213 }
 214
 215 /* return nonzero if one more video frame can be decoded */
 216 static int vsync(void)
 217 {
 218         if (sync_cur > 0) {
 219                 sync_cur--;
 220                 return ffs_avdiff(vffs, affs) >= sync_diff;
 221         }
 222         ffs_wait(vffs);
 223         return 1;
 224 }
 225
 226 static void mainloop(void)
 227 {
 228         int eof = 0;
 229         while (eof < audio + video) {
 230                 execkey();
 231                 if (exited)
 232                         break;
 233                 if (paused) {
 234                         a_doreset(1);
 235                         waitkey();
 236                         continue;
 237                 }
 238                 while (audio && !eof && !a_prodwait()) {
 239                         int ret = ffs_adec(affs, a_buf[a_prod], ABUFSZ);
 240                         if (ret < 0)
 241                                 eof++;
 242                         if (ret > 0) {
 243                                 a_len[a_prod] = ret;
 244                                 a_prod = (a_prod + 1) & (AUDIOBUFS - 1);
 245                         }
 246                 }
 247                 if (video && (!audio || eof || vsync())) {
 248                         int ignore = jump && (vnum++ % (jump + 1));
 249                         void *buf;
 250                         int ret = ffs_vdec(vffs, ignore ? NULL : &buf);
 251                         if (ret < 0)
 252                                 eof++;
 253                         if (ret > 0)
 254                                 draw_frame((void *) buf, ret);
 255                 } else {
 256                         stroll();
 257                 }
 258         }
 259         exited = 1;
 260 }
 261
 262 static void oss_init(void)
 263 {
 264         int rate, ch, bps;
 265         afd = open("/dev/dsp", O_RDWR);
 266         if (afd < 0) {
 267                 fprintf(stderr, "cannot open /dev/dsp\n");
 268                 exit(1);
 269         }
 270         ffs_ainfo(affs, &rate, &bps, &ch);
 271         ioctl(afd, SOUND_PCM_WRITE_RATE, &rate);
 272         ioctl(afd, SOUND_PCM_WRITE_CHANNELS, &ch);
 273         ioctl(afd, SOUND_PCM_WRITE_BITS, &bps);
 274 }
 275
 276 static void oss_close(void)
 277 {
 278         close(afd);
 279 }
 280
 281 static void *process_audio(void *dat)
 282 {
 283         oss_init();
 284         while (1) {
 285                 while (!a_reset && (a_conswait() || paused) && !exited)
 286                         stroll();
 287                 if (exited)
 288                         goto ret;
 289                 if (a_reset) {
 290                         if (a_reset == 1)
 291                                 a_cons = a_prod;
 292                         a_reset = 0;
 293                         continue;
 294                 }
 295                 write(afd, a_buf[a_cons], a_len[a_cons]);
 296                 a_cons = (a_cons + 1) & (AUDIOBUFS - 1);
 297         }
 298 ret:
 299         oss_close();
 300         return NULL;
 301 }
 302
 303 static void term_setup(void)
 304 {
 305         struct termios newtermios;
 306         tcgetattr(STDIN_FILENO, &termios);
 307         newtermios = termios;
 308         newtermios.c_lflag &= ~ICANON;
 309         newtermios.c_lflag &= ~ECHO;
 310         tcsetattr(STDIN_FILENO, TCSAFLUSH, &newtermios);
 311         fcntl(STDIN_FILENO, F_SETFL, fcntl(STDIN_FILENO, F_GETFL) | O_NONBLOCK);
 312 }
 313
 314 static void term_cleanup(void)
 315 {
 316         tcsetattr(STDIN_FILENO, 0, &termios);
 317 }
 318
 319 static void sigcont(int sig)
 320 {
 321         term_setup();
 322 }
 323
 324 static char *usage = "usage: fbff [options] file\n"
 325         "\noptions:\n"
 326         "  -z x     zoom the screen using ffmpeg\n"
 327         "  -m x     magnify the screen by repeating pixels\n"
 328         "  -j x     jump every x video frames; for slow machines\n"
 329         "  -f       start full screen\n"
 330         "  -v x     select video stream; '-' disables video\n"
 331         "  -a x     select audio stream; '-' disables audio\n"
 332         "  -s       always synchronize; useful for files with bad video framerate\n"
 333         "  -t       use time based seeking; only if the default does't work\n"
 334         "  -R       adjust the video to the right of the screen\n\n";
 335
 336 static void read_args(int argc, char *argv[])
 337 {
 338         int i = 1;
 339         while (i < argc) {
 340                 if (!strcmp(argv[i], "-m"))
 341                         magnify = atoi(argv[++i]);
 342                 if (!strcmp(argv[i], "-z"))
 343                         zoom = atof(argv[++i]);
 344                 if (!strcmp(argv[i], "-j"))
 345                         jump = atoi(argv[++i]);
 346                 if (!strcmp(argv[i], "-f"))
 347                         fullscreen = 1;
 348                 if (!strcmp(argv[i], "-s"))
 349                         sync_cnt = sync_cur = (1 << 30);
 350                 if (!strcmp(argv[i], "-v"))
 351                         video = argv[++i][0] == '-' ? 0 : atoi(argv[i]) + 2;
 352                 if (!strcmp(argv[i], "-a"))
 353                         audio = argv[++i][0] == '-' ? 0 : atoi(argv[i]) + 2;
 354                 if (!strcmp(argv[i], "-t"))
 355                         frame_jmp = 1024;
 356                 if (!strcmp(argv[i], "-h"))
 357                         printf(usage);
 358                 if (!strcmp(argv[i], "-R"))
 359                         just = 1;
 360                 i++;
 361         }
 362 }
 363
 364 int main(int argc, char *argv[])
 365 {
 366         pthread_t a_thread;
 367         char *path = argv[argc - 1];
 368         if (argc < 2) {
 369                 printf("usage: %s [options] filename\n", argv[0]);
 370                 return 1;
 371         }
 372         read_args(argc, argv);
 373         ffs_globinit();
 374         if (video && !(vffs = ffs_alloc(path, FFS_VIDEO | video - 1)))
 375                 video = 0;
 376         if (audio && !(affs = ffs_alloc(path, FFS_AUDIO | audio - 1)))
 377                 audio = 0;
 378         if (!video && !audio)
 379                 return 1;
 380         if (audio)
 381                 pthread_create(&a_thread, NULL, process_audio, NULL);
 382         if (video) {
 383                 int w, h;
 384                 if (fb_init())
 385                         return 1;
 386                 ffs_vinfo(vffs, &w, &h);
 387                 if (magnify != 1 && sizeof(fbval_t) != FBM_BPP(fb_mode()))
 388                         fprintf(stderr, "fbff: magnify != 1 and fbval_t doesn't match\n");
 389                 if (fullscreen)
 390                         zoom = (float) fb_cols() / w / magnify;
 391                 ffs_vsetup(vffs, zoom, fb_mode());
 392         }
 393         term_setup();
 394         signal(SIGCONT, sigcont);
 395         mainloop();
 396         term_cleanup();
 397
 398         if (video) {
 399                 fb_free();
 400                 ffs_free(vffs);
 401         }
 402         if (audio) {
 403                 pthread_join(a_thread, NULL);
 404                 ffs_free(affs);
 405         }
 406         return 0;
 407 }