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 void guiMessageBox(int level, char * str) {};
  25
  26 /* XXX Kludge ahead, this MUST be the same as the definitions found in ../spudec.c */
  27 typedef struct packet_t packet_t;
  28 struct packet_t {
  29   unsigned char *packet;
  30   unsigned int palette[4];
  31   unsigned int alpha[4];
  32   unsigned int control_start;   /* index of start of control data */
  33   unsigned int current_nibble[2]; /* next data nibble (4 bits) to be
  34                                      processed (for RLE decoding) for
  35                                      even and odd lines */
  36   int deinterlace_oddness;      /* 0 or 1, index into current_nibble */
  37   unsigned int start_col, end_col;
  38   unsigned int start_row, end_row;
  39   unsigned int width, height, stride;
  40   unsigned int start_pts, end_pts;
  41   packet_t *next;
  42 };
  43 typedef struct {
  44   packet_t *queue_head;
  45   packet_t *queue_tail;
  46   unsigned int global_palette[16];
  47   unsigned int orig_frame_width, orig_frame_height;
  48   unsigned char* packet;
  49   size_t packet_reserve;        /* size of the memory pointed to by packet */
  50   unsigned int packet_offset;   /* end of the currently assembled fragment */
  51   unsigned int packet_size;     /* size of the packet once all fragments are assembled */
  52   unsigned int packet_pts;      /* PTS for this packet */
  53   unsigned int palette[4];
  54   unsigned int alpha[4];
  55   unsigned int cuspal[4];
  56   unsigned int custom;
  57   unsigned int now_pts;
  58   unsigned int start_pts, end_pts;
  59   unsigned int start_col, end_col;
  60   unsigned int start_row, end_row;
  61   unsigned int width, height, stride;
  62   size_t image_size;            /* Size of the image buffer */
  63   unsigned char *image;         /* Grayscale value */
  64   unsigned char *aimage;        /* Alpha value */
  65   unsigned int scaled_frame_width, scaled_frame_height;
  66   unsigned int scaled_start_col, scaled_start_row;
  67   unsigned int scaled_width, scaled_height, scaled_stride;
  68   size_t scaled_image_size;
  69   unsigned char *scaled_image;
  70   unsigned char *scaled_aimage;
  71   int auto_palette; /* 1 if we lack a palette and must use an heuristic. */
  72   int font_start_level;  /* Darkest value used for the computed font */
  73   const vo_functions_t *hw_spu;
  74   int spu_changed;
  75 } spudec_handle_t;
  76
  77 int use_gui;
  78 int gtkMessageBox;
  79 int identify=0;
  80 int vobsub_id=0;
  81 int sub_pos=0;
  82
  83 static spudec_handle_t *spudec;
  84 static FILE *fsub = NULL;
  85 static unsigned int sub_idx = 0;
  86
  87 static void
  88 process_gocr_output(const char *const fname, unsigned int start, unsigned int end)
  89 {
  90     FILE *file;
  91     int temp, h, m, s, ms;
  92     int c, bol;
  93     file = fopen(fname, "r");
  94     if (file == NULL) {
  95         perror("fopen failed");
  96         return;
  97     }
  98     temp = start;
  99     temp /= 90;
 100     h = temp / 3600000;
 101     temp %= 3600000;
 102     m = temp / 60000;
 103     temp %= 60000;
 104     s = temp / 1000;
 105     temp %= 1000;
 106     ms = temp;
 107     fprintf(fsub, "%d\n%02d:%02d:%02d,%03d --> ", ++sub_idx, h, m, s, ms);
 108     temp = end;
 109     temp /= 90;
 110     h = temp / 3600000;
 111     temp %= 3600000;
 112     m = temp / 60000;
 113     temp %= 60000;
 114     s = temp / 1000;
 115     temp %= 1000;
 116     ms = temp;
 117     fprintf(fsub, "%02d:%02d:%02d,%03d\n", h, m, s, ms);
 118     bol = 1;
 119     while ((c = getc(file)) != EOF) {
 120         if (bol) {
 121             if (!isspace(c)) {
 122                 putc(c, fsub);
 123                 bol=0;
 124             }
 125         }
 126         else if (!bol) {
 127             putc(c, fsub);
 128             bol = c == '\n';
 129         }
 130     }
 131     putc('\n', fsub);
 132     fflush(fsub);
 133     fclose(file);
 134 }
 135
 136 static void
 137 output_pgm(FILE *f, int w, int h, unsigned char *src, unsigned char *srca, int stride)
 138 {
 139     int x, y;
 140     fprintf(f,
 141             "P5\n"
 142             "%d %d\n"
 143             "255\n",
 144             w, h);
 145     for (y = 0; y < h; ++y) {
 146         for (x = 0; x < w; ++x) {
 147             int res;
 148             if (srca[x])
 149                 res = src[x] * (256 - srca[x]);
 150             else
 151                 res = 0;
 152             res = (65535 - res) >> 8;
 153             putc(res&0xff, f);
 154
 155         }
 156         src += stride;
 157         srca += stride;
 158     }
 159     putc('\n', f);
 160 }
 161
 162 static void
 163 draw_alpha(int x0, int y0, int w, int h, unsigned char *src, unsigned char *srca, int stride)
 164 {
 165     FILE *f;
 166     char buf[128];
 167     char cmd[512];
 168     int cmdres;
 169     const char *const tmpfname = tmpnam(NULL);
 170     sprintf(buf, "subtitle-%d-%d.pgm", spudec->start_pts / 90, spudec->end_pts / 90);
 171     f = fopen(buf, "w");
 172     output_pgm(f, w, h, src, srca, stride);
 173     fclose(f);
 174     /* see <URL:http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/subtitleripper/subtitleripper/src/README.gocr?rev=HEAD&content-type=text/vnd.viewcvs-markup> */
 175     sprintf(cmd, GOCR_PROGRAM" -v 1 -s 7 -d 0 -m 130 -m 256 -m 32 -i %s -o %s", buf, tmpfname);
 176     cmdres = system(cmd);
 177     if (cmdres < 0) {
 178         perror("system failed");
 179         exit(EXIT_FAILURE);
 180     }
 181     else if (cmdres) {
 182         fprintf(stderr, GOCR_PROGRAM" returned %d\n", cmdres);
 183         exit(cmdres);
 184     }
 185     process_gocr_output(tmpfname, spudec->start_pts, spudec->end_pts);
 186     unlink(buf);
 187     unlink(tmpfname);
 188 }
 189
 190 int
 191 main(int argc, char **argv)
 192 {
 193     const char *vobsubname, *subripname;
 194     void *vobsub;
 195     void *packet;
 196     int packet_len;
 197     unsigned int pts100;
 198
 199     if (argc < 2 || 4 < argc) {
 200         fprintf(stderr, "Usage: %s <vobsub basename> [<subid> [<output filename>] ]\n", argv[0]);
 201         exit(EXIT_FAILURE);
 202     }
 203     vobsubname = argv[1];
 204     subripname = NULL;
 205     fsub = stdout;
 206     if (argc >= 3)
 207         vobsub_id = atoi(argv[2]);
 208     if (argc >= 4) {
 209         subripname = argv[3];
 210         fsub = fopen(subripname, "w");
 211     }
 212
 213     vobsub = vobsub_open(vobsubname, NULL, 0, &spudec);
 214     while ((packet_len=vobsub_get_next_packet(vobsub, &packet, &pts100)) >= 0) {
 215         spudec_assemble(spudec, packet, packet_len, pts100);
 216         if (spudec->queue_head) {
 217                 spudec_heartbeat(spudec, spudec->queue_head->start_pts);
 218         if (spudec_changed(spudec))
 219             spudec_draw(spudec, draw_alpha);
 220         }
 221     }
 222
 223     if (vobsub)
 224         vobsub_close(vobsub);
 225     exit(EXIT_SUCCESS);
 226 }