TOOLS/subrip.c

   1 /*
   2  * Use with CVS JOCR/GOCR.
   3  *
   4  * You will have to change 'vobsub_id' value if you want another subtitle than number 0.
   5  *
   6  * HINT: you can view the subtitle that is being decoded with "display subtitle-*.pgm"
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22
  23 /* Make sure this accesses the CVS version of JOCR/GOCR */
  24 #define GOCR_PROGRAM "gocr"
  25
  26 #include <ctype.h>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <unistd.h>
  31 #include <sys/types.h>
  32 #include <sys/wait.h>
  33 #include "libvo/video_out.h"
  34 #include "vobsub.h"
  35 #include "spudec.h"
  36
  37 /* XXX Kludge ahead, this MUST be the same as the definitions found in ../spudec.c */
  38 typedef struct packet_t packet_t;
  39 struct packet_t {
  40   unsigned char *packet;
  41   unsigned int palette[4];
  42   unsigned int alpha[4];
  43   unsigned int control_start;   /* index of start of control data */
  44   unsigned int current_nibble[2]; /* next data nibble (4 bits) to be
  45                                      processed (for RLE decoding) for
  46                                      even and odd lines */
  47   int deinterlace_oddness;      /* 0 or 1, index into current_nibble */
  48   unsigned int start_col, end_col;
  49   unsigned int start_row, end_row;
  50   unsigned int width, height, stride;
  51   unsigned int start_pts, end_pts;
  52   packet_t *next;
  53 };
  54 typedef struct {
  55   packet_t *queue_head;
  56   packet_t *queue_tail;
  57   unsigned int global_palette[16];
  58   unsigned int orig_frame_width, orig_frame_height;
  59   unsigned char* packet;
  60   size_t packet_reserve;        /* size of the memory pointed to by packet */
  61   unsigned int packet_offset;   /* end of the currently assembled fragment */
  62   unsigned int packet_size;     /* size of the packet once all fragments are assembled */
  63   unsigned int packet_pts;      /* PTS for this packet */
  64   unsigned int palette[4];
  65   unsigned int alpha[4];
  66   unsigned int cuspal[4];
  67   unsigned int custom;
  68   unsigned int now_pts;
  69   unsigned int start_pts, end_pts;
  70   unsigned int start_col, end_col;
  71   unsigned int start_row, end_row;
  72   unsigned int width, height, stride;
  73   size_t image_size;            /* Size of the image buffer */
  74   unsigned char *image;         /* Grayscale value */
  75   unsigned char *aimage;        /* Alpha value */
  76   unsigned int scaled_frame_width, scaled_frame_height;
  77   unsigned int scaled_start_col, scaled_start_row;
  78   unsigned int scaled_width, scaled_height, scaled_stride;
  79   size_t scaled_image_size;
  80   unsigned char *scaled_image;
  81   unsigned char *scaled_aimage;
  82   int auto_palette; /* 1 if we lack a palette and must use an heuristic. */
  83   int font_start_level;  /* Darkest value used for the computed font */
  84   const vo_functions_t *hw_spu;
  85   int spu_changed;
  86 } spudec_handle_t;
  87
  88 int vobsub_id=0;
  89 int sub_pos=0;
  90
  91 static spudec_handle_t *spudec;
  92 static FILE *fsub = NULL;
  93 static unsigned int sub_idx = 0;
  94
  95 static void
  96 process_gocr_output(const char *const fname, unsigned int start, unsigned int end)
  97 {
  98     FILE *file;
  99     int temp, h, m, s, ms;
 100     int c, bol;
 101     file = fopen(fname, "r");
 102     if (file == NULL) {
 103         perror("fopen failed");
 104         return;
 105     }
 106     temp = start;
 107     temp /= 90;
 108     h = temp / 3600000;
 109     temp %= 3600000;
 110     m = temp / 60000;
 111     temp %= 60000;
 112     s = temp / 1000;
 113     temp %= 1000;
 114     ms = temp;
 115     fprintf(fsub, "%d\n%02d:%02d:%02d,%03d --> ", ++sub_idx, h, m, s, ms);
 116     temp = end;
 117     temp /= 90;
 118     h = temp / 3600000;
 119     temp %= 3600000;
 120     m = temp / 60000;
 121     temp %= 60000;
 122     s = temp / 1000;
 123     temp %= 1000;
 124     ms = temp;
 125     fprintf(fsub, "%02d:%02d:%02d,%03d\n", h, m, s, ms);
 126     bol = 1;
 127     while ((c = getc(file)) != EOF) {
 128         if (bol) {
 129             if (!isspace(c)) {
 130                 putc(c, fsub);
 131                 bol=0;
 132             }
 133         }
 134         else if (!bol) {
 135             putc(c, fsub);
 136             bol = c == '\n';
 137         }
 138     }
 139     putc('\n', fsub);
 140     fflush(fsub);
 141     fclose(file);
 142 }
 143
 144 static void
 145 output_pgm(FILE *f, int w, int h, unsigned char *src, unsigned char *srca, int stride)
 146 {
 147     int x, y;
 148     fprintf(f,
 149             "P5\n"
 150             "%d %d\n"
 151             "255\n",
 152             w, h);
 153     for (y = 0; y < h; ++y) {
 154         for (x = 0; x < w; ++x) {
 155             int res;
 156             if (srca[x])
 157                 res = src[x] * (256 - srca[x]);
 158             else
 159                 res = 0;
 160             res = (65535 - res) >> 8;
 161             putc(res&0xff, f);
 162
 163         }
 164         src += stride;
 165         srca += stride;
 166     }
 167     putc('\n', f);
 168 }
 169
 170 static void
 171 draw_alpha(int x0, int y0, int w, int h, unsigned char *src, unsigned char *srca, int stride)
 172 {
 173     FILE *f;
 174     char buf[128];
 175     char cmd[512];
 176     int cmdres;
 177     const char *const tmpfname = tmpnam(NULL);
 178     sprintf(buf, "subtitle-%d-%d.pgm", spudec->start_pts / 90, spudec->end_pts / 90);
 179     f = fopen(buf, "w");
 180     output_pgm(f, w, h, src, srca, stride);
 181     fclose(f);
 182     /* see <URL:http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/subtitleripper/subtitleripper/src/README.gocr?rev=HEAD&content-type=text/vnd.viewcvs-markup> */
 183     sprintf(cmd, GOCR_PROGRAM" -v 1 -s 7 -d 0 -m 130 -m 256 -m 32 -i %s -o %s", buf, tmpfname);
 184     cmdres = system(cmd);
 185     if (cmdres < 0) {
 186         perror("system failed");
 187         exit(EXIT_FAILURE);
 188     }
 189     else if (cmdres) {
 190         fprintf(stderr, GOCR_PROGRAM" returned %d\n", cmdres);
 191         exit(cmdres);
 192     }
 193     process_gocr_output(tmpfname, spudec->start_pts, spudec->end_pts);
 194     unlink(buf);
 195     unlink(tmpfname);
 196 }
 197
 198 int
 199 main(int argc, char **argv)
 200 {
 201     const char *vobsubname, *subripname;
 202     void *vobsub;
 203     void *packet;
 204     int packet_len;
 205     unsigned int pts100;
 206
 207     if (argc < 2 || 4 < argc) {
 208         fprintf(stderr, "Usage: %s <vobsub basename> [<subid> [<output filename>] ]\n", argv[0]);
 209         exit(EXIT_FAILURE);
 210     }
 211     vobsubname = argv[1];
 212     subripname = NULL;
 213     fsub = stdout;
 214     if (argc >= 3)
 215         vobsub_id = atoi(argv[2]);
 216     if (argc >= 4) {
 217         subripname = argv[3];
 218         fsub = fopen(subripname, "w");
 219     }
 220
 221     vobsub = vobsub_open(vobsubname, NULL, 0, &spudec);
 222     while ((packet_len=vobsub_get_next_packet(vobsub, &packet, &pts100)) >= 0) {
 223         spudec_assemble(spudec, packet, packet_len, pts100);
 224         if (spudec->queue_head) {
 225                 spudec_heartbeat(spudec, spudec->queue_head->start_pts);
 226         if (spudec_changed(spudec))
 227             spudec_draw(spudec, draw_alpha);
 228         }
 229     }
 230
 231     if (vobsub)
 232         vobsub_close(vobsub);
 233     exit(EXIT_SUCCESS);
 234 }