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  */
   9
  10 /* Make sure this accesses the CVS version of JOCR/GOCR */
  11 #define GOCR_PROGRAM "gocr"
  12
  13 #include <ctype.h>
  14 #include <stdio.h>
  15 #include <stdlib.h>
  16 #include <string.h>
  17 #include <unistd.h>
  18 #include <sys/types.h>
  19 #include <sys/wait.h>
  20 #include "libvo/video_out.h"
  21 #include "vobsub.h"
  22 #include "spudec.h"
  23
  24 /* XXX Kludge ahead, this MUST be the same as the definitions found in ../spudec.c */
  25 typedef struct packet_t packet_t;
  26 struct packet_t {
  27   unsigned char *packet;
  28   unsigned int palette[4];
  29   unsigned int alpha[4];
  30   unsigned int control_start;   /* index of start of control data */
  31   unsigned int current_nibble[2]; /* next data nibble (4 bits) to be
  32                                      processed (for RLE decoding) for
  33                                      even and odd lines */
  34   int deinterlace_oddness;      /* 0 or 1, index into current_nibble */
  35   unsigned int start_col, end_col;
  36   unsigned int start_row, end_row;
  37   unsigned int width, height, stride;
  38   unsigned int start_pts, end_pts;
  39   packet_t *next;
  40 };
  41 typedef struct {
  42   packet_t *queue_head;
  43   packet_t *queue_tail;
  44   unsigned int global_palette[16];
  45   unsigned int orig_frame_width, orig_frame_height;
  46   unsigned char* packet;
  47   size_t packet_reserve;        /* size of the memory pointed to by packet */
  48   unsigned int packet_offset;   /* end of the currently assembled fragment */
  49   unsigned int packet_size;     /* size of the packet once all fragments are assembled */
  50   unsigned int packet_pts;      /* PTS for this packet */
  51   unsigned int palette[4];
  52   unsigned int alpha[4];
  53   unsigned int cuspal[4];
  54   unsigned int custom;
  55   unsigned int now_pts;
  56   unsigned int start_pts, end_pts;
  57   unsigned int start_col, end_col;
  58   unsigned int start_row, end_row;
  59   unsigned int width, height, stride;
  60   size_t image_size;            /* Size of the image buffer */
  61   unsigned char *image;         /* Grayscale value */
  62   unsigned char *aimage;        /* Alpha value */
  63   unsigned int scaled_frame_width, scaled_frame_height;
  64   unsigned int scaled_start_col, scaled_start_row;
  65   unsigned int scaled_width, scaled_height, scaled_stride;
  66   size_t scaled_image_size;
  67   unsigned char *scaled_image;
  68   unsigned char *scaled_aimage;
  69   int auto_palette; /* 1 if we lack a palette and must use an heuristic. */
  70   int font_start_level;  /* Darkest value used for the computed font */
  71   const vo_functions_t *hw_spu;
  72   int spu_changed;
  73 } spudec_handle_t;
  74
  75 int vobsub_id=0;
  76 int sub_pos=0;
  77
  78 static spudec_handle_t *spudec;
  79 static FILE *fsub = NULL;
  80 static unsigned int sub_idx = 0;
  81
  82 static void
  83 process_gocr_output(const char *const fname, unsigned int start, unsigned int end)
  84 {
  85     FILE *file;
  86     int temp, h, m, s, ms;
  87     int c, bol;
  88     file = fopen(fname, "r");
  89     if (file == NULL) {
  90         perror("fopen failed");
  91         return;
  92     }
  93     temp = start;
  94     temp /= 90;
  95     h = temp / 3600000;
  96     temp %= 3600000;
  97     m = temp / 60000;
  98     temp %= 60000;
  99     s = temp / 1000;
 100     temp %= 1000;
 101     ms = temp;
 102     fprintf(fsub, "%d\n%02d:%02d:%02d,%03d --> ", ++sub_idx, h, m, s, ms);
 103     temp = end;
 104     temp /= 90;
 105     h = temp / 3600000;
 106     temp %= 3600000;
 107     m = temp / 60000;
 108     temp %= 60000;
 109     s = temp / 1000;
 110     temp %= 1000;
 111     ms = temp;
 112     fprintf(fsub, "%02d:%02d:%02d,%03d\n", h, m, s, ms);
 113     bol = 1;
 114     while ((c = getc(file)) != EOF) {
 115         if (bol) {
 116             if (!isspace(c)) {
 117                 putc(c, fsub);
 118                 bol=0;
 119             }
 120         }
 121         else if (!bol) {
 122             putc(c, fsub);
 123             bol = c == '\n';
 124         }
 125     }
 126     putc('\n', fsub);
 127     fflush(fsub);
 128     fclose(file);
 129 }
 130
 131 static void
 132 output_pgm(FILE *f, int w, int h, unsigned char *src, unsigned char *srca, int stride)
 133 {
 134     int x, y;
 135     fprintf(f,
 136             "P5\n"
 137             "%d %d\n"
 138             "255\n",
 139             w, h);
 140     for (y = 0; y < h; ++y) {
 141         for (x = 0; x < w; ++x) {
 142             int res;
 143             if (srca[x])
 144                 res = src[x] * (256 - srca[x]);
 145             else
 146                 res = 0;
 147             res = (65535 - res) >> 8;
 148             putc(res&0xff, f);
 149
 150         }
 151         src += stride;
 152         srca += stride;
 153     }
 154     putc('\n', f);
 155 }
 156
 157 static void
 158 draw_alpha(int x0, int y0, int w, int h, unsigned char *src, unsigned char *srca, int stride)
 159 {
 160     FILE *f;
 161     char buf[128];
 162     char cmd[512];
 163     int cmdres;
 164     const char *const tmpfname = tmpnam(NULL);
 165     sprintf(buf, "subtitle-%d-%d.pgm", spudec->start_pts / 90, spudec->end_pts / 90);
 166     f = fopen(buf, "w");
 167     output_pgm(f, w, h, src, srca, stride);
 168     fclose(f);
 169     /* see <URL:http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/subtitleripper/subtitleripper/src/README.gocr?rev=HEAD&content-type=text/vnd.viewcvs-markup> */
 170     sprintf(cmd, GOCR_PROGRAM" -v 1 -s 7 -d 0 -m 130 -m 256 -m 32 -i %s -o %s", buf, tmpfname);
 171     cmdres = system(cmd);
 172     if (cmdres < 0) {
 173         perror("system failed");
 174         exit(EXIT_FAILURE);
 175     }
 176     else if (cmdres) {
 177         fprintf(stderr, GOCR_PROGRAM" returned %d\n", cmdres);
 178         exit(cmdres);
 179     }
 180     process_gocr_output(tmpfname, spudec->start_pts, spudec->end_pts);
 181     unlink(buf);
 182     unlink(tmpfname);
 183 }
 184
 185 int
 186 main(int argc, char **argv)
 187 {
 188     const char *vobsubname, *subripname;
 189     void *vobsub;
 190     void *packet;
 191     int packet_len;
 192     unsigned int pts100;
 193
 194     if (argc < 2 || 4 < argc) {
 195         fprintf(stderr, "Usage: %s <vobsub basename> [<subid> [<output filename>] ]\n", argv[0]);
 196         exit(EXIT_FAILURE);
 197     }
 198     vobsubname = argv[1];
 199     subripname = NULL;
 200     fsub = stdout;
 201     if (argc >= 3)
 202         vobsub_id = atoi(argv[2]);
 203     if (argc >= 4) {
 204         subripname = argv[3];
 205         fsub = fopen(subripname, "w");
 206     }
 207
 208     vobsub = vobsub_open(vobsubname, NULL, 0, &spudec);
 209     while ((packet_len=vobsub_get_next_packet(vobsub, &packet, &pts100)) >= 0) {
 210         spudec_assemble(spudec, packet, packet_len, pts100);
 211         if (spudec->queue_head) {
 212                 spudec_heartbeat(spudec, spudec->queue_head->start_pts);
 213         if (spudec_changed(spudec))
 214             spudec_draw(spudec, draw_alpha);
 215         }
 216     }
 217
 218     if (vobsub)
 219         vobsub_close(vobsub);
 220     exit(EXIT_SUCCESS);
 221 }