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 frame_jmp = 1;       /* the changes to pos_cur for each frame */
  29 static int afd;                 /* oss fd */
  30
  31 static int arg;
  32 static struct termios termios;
  33 static int paused;
  34 static int exited;
  35
  36 static float zoom = 1;
  37 static int magnify = 1;
  38 static int jump = 0;
  39 static int fullscreen = 0;
  40 static int audio = 1;
  41 static int video = 1;
  42 static int just = 0;
  43
  44 static struct ffs *affs;                /* audio ffmpeg stream */
  45 static struct ffs *vffs;                /* video ffmpeg stream */
  46
  47 static void draw_frame(void *img, int linelen)
  48 {
  49         int w, h;
  50         fbval_t buf[1 << 14];
  51         int nr, nc, cb;
  52         int i, r, c;
  53         ffs_vinfo(vffs, &w, &h);
  54         nr = MIN(h * zoom, fb_rows() / magnify);
  55         nc = MIN(w * zoom, fb_cols() / magnify);
  56         cb = just ? fb_cols() - nc * magnify : 0;
  57         for (r = 0; r < nr; r++) {
  58                 fbval_t *row = img + r * linelen;
  59                 if (magnify == 1) {
  60                         fb_set(r, cb, row, nc);
  61                         continue;
  62                 }
  63                 for (c = 0; c < nc; c++)
  64                         for (i = 0; i < magnify; i++)
  65                                 buf[c * magnify + i] = row[c];
  66                 for (i = 0; i < magnify; i++)
  67                         fb_set(r * magnify + i, cb, buf, nc * magnify);
  68         }
  69 }
  70
  71 #define ABUFSZ          (1 << 18)
  72
  73 static int a_cons;
  74 static int a_prod;
  75 static char a_buf[AUDIOBUFS][ABUFSZ];
  76 static int a_len[AUDIOBUFS];
  77 static int a_reset;
  78
  79 static int a_conswait(void)
  80 {
  81         return a_cons == a_prod;
  82 }
  83
  84 static int a_prodwait(void)
  85 {
  86         return ((a_prod + 1) & (AUDIOBUFS - 1)) == a_cons;
  87 }
  88
  89 static void a_doreset(int pause)
  90 {
  91         a_reset = 1 + pause;
  92         while (audio && a_reset)
  93                 usleep(1000);
  94 }
  95
  96 static int readkey(void)
  97 {
  98         char b;
  99         if (read(STDIN_FILENO, &b, 1) <= 0)
 100                 return -1;
 101         return b;
 102 }
 103
 104 static void waitkey(void)
 105 {
 106         struct pollfd ufds[1];
 107         ufds[0].fd = STDIN_FILENO;
 108         ufds[0].events = POLLIN;
 109         poll(ufds, 1, -1);
 110 }
 111
 112 static int ffarg(void)
 113 {
 114         int n = arg;
 115         arg = 0;
 116         return n ? n : 1;
 117 }
 118
 119 static void ffjmp(int n, int rel)
 120 {
 121         struct ffs *ffs = video ? vffs : affs;
 122         long pos = ffs_pos(ffs, n);
 123         a_doreset(0);
 124         if (audio)
 125                 ffs_seek(affs, pos, frame_jmp);
 126         if (video)
 127                 ffs_seek(vffs, pos, frame_jmp);
 128 }
 129
 130 static void printinfo(void)
 131 {
 132         struct ffs *ffs = video ? vffs : affs;
 133         printf("fbff:   %8lx\r", ffs_pos(ffs, 0));
 134         fflush(stdout);
 135 }
 136
 137 #define JMP1            (1 << 5)
 138 #define JMP2            (JMP1 << 3)
 139 #define JMP3            (JMP2 << 5)
 140
 141 static void execkey(void)
 142 {
 143         int c;
 144         while ((c = readkey()) != -1) {
 145                 switch (c) {
 146                 case 'q':
 147                         exited = 1;
 148                         break;
 149                 case 'l':
 150                         ffjmp(ffarg() * JMP1, 1);
 151                         break;
 152                 case 'h':
 153                         ffjmp(-ffarg() * JMP1, 1);
 154                         break;
 155                 case 'j':
 156                         ffjmp(ffarg() * JMP2, 1);
 157                         break;
 158                 case 'k':
 159                         ffjmp(-ffarg() * JMP2, 1);
 160                         break;
 161                 case 'J':
 162                         ffjmp(ffarg() * JMP3, 1);
 163                         break;
 164                 case 'K':
 165                         ffjmp(-ffarg() * JMP3, 1);
 166                         break;
 167                 case '%':
 168                         if (arg)
 169                                 ffjmp(100, 0);
 170                         break;
 171                 case 'i':
 172                         printinfo();
 173                         break;
 174                 case ' ':
 175                 case 'p':
 176                         paused = !paused;
 177                         break;
 178                 case 27:
 179                         arg = 0;
 180                         break;
 181                 default:
 182                         if (isdigit(c))
 183                                 arg = arg * 10 + c - '0';
 184                 }
 185         }
 186 }
 187
 188 static int is_vsync(void)
 189 {
 190         int cur = ffs_seq(affs, 0);
 191         int all = ffs_seq(affs, 1);
 192         int ratio = all ? (all - cur) * 1024 / all : 512;
 193         int avdiff = AUDIOBUFS * 4 * ratio / 1024;
 194         return ffs_seq(vffs, 1) + avdiff < ffs_seq(affs, 1);
 195 }
 196
 197 static void mainloop(void)
 198 {
 199         int eof = 0;
 200         while (1) {
 201                 execkey();
 202                 if (exited)
 203                         break;
 204                 if (paused) {
 205                         a_doreset(1);
 206                         waitkey();
 207                         continue;
 208                 }
 209                 while (audio && !eof && !a_prodwait()) {
 210                         int ret = ffs_adec(affs, a_buf[a_prod], ABUFSZ);
 211                         if (ret < 0)
 212                                 eof = 1;
 213                         if (ret > 0) {
 214                                 a_len[a_prod] = ret;
 215                                 a_prod = (a_prod + 1) & (AUDIOBUFS - 1);
 216                         }
 217                 }
 218                 if (video && (!audio || eof || is_vsync())) {
 219                         int ignore = jump && !(ffs_seq(vffs, 0) % (jump + 1));
 220                         char *buf;
 221                         int ret = ffs_vdec(vffs, ignore ? NULL : &buf);
 222                         if (ret < 0)
 223                                 break;
 224                         if (ret > 0)
 225                                 draw_frame((void *) buf, ret);
 226                         ffs_wait(vffs);
 227                 }
 228         }
 229         exited = 1;
 230 }
 231
 232 static void oss_init(void)
 233 {
 234         int rate, ch, bps;
 235         afd = open("/dev/dsp", O_RDWR);
 236         if (afd < 0) {
 237                 fprintf(stderr, "cannot open /dev/dsp\n");
 238                 exit(1);
 239         }
 240         ffs_ainfo(affs, &rate, &bps, &ch);
 241         ioctl(afd, SOUND_PCM_WRITE_RATE, &rate);
 242         ioctl(afd, SOUND_PCM_WRITE_CHANNELS, &ch);
 243         ioctl(afd, SOUND_PCM_WRITE_BITS, &bps);
 244 }
 245
 246 static void oss_close(void)
 247 {
 248         close(afd);
 249 }
 250
 251 static void *process_audio(void *dat)
 252 {
 253         oss_init();
 254         while (1) {
 255                 while (!a_reset && a_conswait() && !exited)
 256                         usleep(1000);
 257                 if (exited)
 258                         goto ret;
 259                 if (a_reset) {
 260                         if (a_reset == 1)
 261                                 a_cons = a_prod;
 262                         a_reset = 0;
 263                         continue;
 264                 }
 265                 write(afd, a_buf[a_cons], a_len[a_cons]);
 266                 a_cons = (a_cons + 1) & (AUDIOBUFS - 1);
 267         }
 268 ret:
 269         oss_close();
 270         return NULL;
 271 }
 272
 273 static void term_setup(void)
 274 {
 275         struct termios newtermios;
 276         tcgetattr(STDIN_FILENO, &termios);
 277         newtermios = termios;
 278         newtermios.c_lflag &= ~ICANON;
 279         newtermios.c_lflag &= ~ECHO;
 280         tcsetattr(STDIN_FILENO, TCSAFLUSH, &newtermios);
 281         fcntl(STDIN_FILENO, F_SETFL, fcntl(STDIN_FILENO, F_GETFL) | O_NONBLOCK);
 282 }
 283
 284 static void term_cleanup(void)
 285 {
 286         tcsetattr(STDIN_FILENO, 0, &termios);
 287 }
 288
 289 static void sigcont(int sig)
 290 {
 291         term_setup();
 292 }
 293
 294 static char *usage = "usage: fbff [options] file\n"
 295         "\noptions:\n"
 296         "  -m x     magnify the screen by repeating pixels\n"
 297         "  -z x     zoom the screen using ffmpeg\n"
 298         "  -j x     jump every x video frames; for slow machines\n"
 299         "  -f       start full screen\n"
 300         "  -v       video only playback\n"
 301         "  -a       audio only playback\n"
 302         "  -t       use time based seeking; only if the default does't work\n"
 303         "  -R       adjust the video to the right of the screen\n\n";
 304
 305 static void read_args(int argc, char *argv[])
 306 {
 307         int i = 1;
 308         while (i < argc) {
 309                 if (!strcmp(argv[i], "-m"))
 310                         magnify = atoi(argv[++i]);
 311                 if (!strcmp(argv[i], "-z"))
 312                         zoom = atof(argv[++i]);
 313                 if (!strcmp(argv[i], "-j"))
 314                         jump = atoi(argv[++i]);
 315                 if (!strcmp(argv[i], "-f"))
 316                         fullscreen = 1;
 317                 if (!strcmp(argv[i], "-a"))
 318                         video = 0;
 319                 if (!strcmp(argv[i], "-v"))
 320                         audio = 0;
 321                 if (!strcmp(argv[i], "-t"))
 322                         frame_jmp = 1024 / 32;
 323                 if (!strcmp(argv[i], "-h"))
 324                         printf(usage);
 325                 if (!strcmp(argv[i], "-R"))
 326                         just = 1;
 327                 i++;
 328         }
 329 }
 330
 331 int main(int argc, char *argv[])
 332 {
 333         pthread_t a_thread;
 334         char *path = argv[argc - 1];
 335         if (argc < 2) {
 336                 printf("usage: %s [options] filename\n", argv[0]);
 337                 return 1;
 338         }
 339         read_args(argc, argv);
 340         ffs_globinit();
 341         if (video && !(vffs = ffs_alloc(path, 1)))
 342                 video = 0;
 343         if (audio && !(affs = ffs_alloc(path, 0)))
 344                 audio = 0;
 345         if (!video && !audio)
 346                 return 1;
 347         if (audio)
 348                 pthread_create(&a_thread, NULL, process_audio, NULL);
 349         if (video) {
 350                 int w, h;
 351                 if (fb_init())
 352                         return 1;
 353                 ffs_vinfo(vffs, &w, &h);
 354                 if (magnify != 1 && sizeof(fbval_t) != FBM_BPP(fb_mode()))
 355                         fprintf(stderr, "fbff: magnify != 1 and fbval_t doesn't match\n");
 356                 if (fullscreen)
 357                         zoom = (float) fb_cols() / w / magnify;
 358                 ffs_vsetup(vffs, zoom, fb_mode());
 359         }
 360         term_setup();
 361         signal(SIGCONT, sigcont);
 362         mainloop();
 363         term_cleanup();
 364
 365         if (video) {
 366                 fb_free();
 367                 ffs_free(vffs);
 368         }
 369         if (audio) {
 370                 pthread_join(a_thread, NULL);
 371                 ffs_free(affs);
 372         }
 373         return 0;
 374 }