/*
   Copyright (C) 2003 Commonwealth Scientific and Industrial Research
   Organisation (CSIRO) Australia

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:

   - Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.

   - Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.

   - Neither the name of CSIRO Australia nor the names of its
   contributors may be used to endorse or promote products derived from
   this software without specific prior written permission.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
   PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE ORGANISATION OR
   CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include "config.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <inttypes.h>
#include <getopt.h>
#include <errno.h>

#include <oggz/oggz.h>

#define DEBUG

#undef MIN
#define MIN(a,b) (((a)<(b))?(a):(b))

static char * progname;
static FILE * outfile = NULL;
static int dump_bits = 0;
static int dump_char = 1;
static int dump_all_serialnos = 1;
static int truth = 1;

static int hide_offset = 0;
static int hide_serialno = 0;
static int hide_granulepos = 0;
static int hide_packetno = 0;

static void
usage (char * progname)
{
  printf ("Usage: %s [options] filename\n", progname);
}

static void
dump_char_line (unsigned char * buf, long n)
{
  int i;

  fprintf (outfile, "  ");
  
  for (i = 0; i < n; i++) {
    if (isgraph(buf[i])) fprintf (outfile, "%c", buf[i]);
    else if (isspace(buf[i])) fprintf (outfile, " ");
    else fprintf (outfile, ".");
  }
}

static void
hex_dump (unsigned char * buf, long n)
{
  int i;
  long remaining = n, count = 0;
  long rowlen;

  while (remaining > 0) {
    rowlen = MIN (remaining, 16);

    if (n > 0xffffff)
      fprintf (outfile, "%08lx:", count);
    else if (n > 0xffff)
      fprintf (outfile, "  %06lx:", count);
    else
      fprintf (outfile, "    %04lx:", count);

    for (i = 0; i < rowlen; i++) {
      if (!(i%2)) fprintf (outfile, " ");
      fprintf (outfile, "%02x", buf[i]);
    }

    for (; i < 16; i++) {
      if (!(i%2)) fprintf (outfile, " ");
      fprintf (outfile, "  ");
    }

    if (dump_char)
      dump_char_line (buf, rowlen);

    fprintf(outfile, "\n");

    remaining -= rowlen;
    buf += rowlen;
    count += rowlen;
  }
}

static void
bin_dump (unsigned char * buf, long n)
{
  int i, j;
  long remaining = n, count = 0;
  long rowlen;

  while (remaining > 0) {
    rowlen = MIN (remaining, 6);

    if (n > 0xffffff)
      fprintf (outfile, "%08lx:", count);
    else if (n > 0xffff)
      fprintf (outfile, "  %06lx:", count);
    else
      fprintf (outfile, "    %04lx:", count);

    for (i = 0; i < rowlen; i++) {
      fprintf (outfile, " ");
#ifdef WORDS_BIGENDIAN
      for (j = 0; j < 8; j++)
#else
      for (j = 7; j >= 0; j--)
#endif
	fprintf (outfile, "%c", (buf[i]&(1<<j)) ? '1' : '0');
    }

    for (; i < 6; i++) {
      if (!(i%2)) fprintf (outfile, " ");
      fprintf (outfile, "         ");
    }

    if (dump_char)
      dump_char_line (buf, rowlen);

    printf("\n");

    remaining -= rowlen;
    buf += rowlen;
    count += rowlen;
  }
}

static int
read_packet (OGGZ * oggz, ogg_packet * op, long serialno, void * user_data)
{
  fprintf (outfile, "%08lx: serialno %010ld, "
	   "granulepos %" PRId64 ", packetno %" PRId64,
	   hide_offset ? -1 : oggz_tell (oggz),
	   hide_serialno ? -1 : serialno,
	   hide_granulepos ? -1 : op->granulepos,
	   hide_packetno ? -1 : op->packetno);

  if (op->b_o_s) {
    fprintf (outfile, " *** bos");
  }

  if (op->e_o_s) {
    fprintf (outfile, " *** eos");
  }

  fprintf (outfile, ":\n");

  if (dump_bits) {
    bin_dump (op->packet, op->bytes);
  } else {
    hex_dump (op->packet, op->bytes);
  }

  fprintf (outfile, "\n");

  return 0;
}

static int
ignore_packet (OGGZ * oggz, ogg_packet * op, long serialno, void * user_data)
{
  return -1;
}

static int
read_new_packet (OGGZ * oggz, ogg_packet * op, long serialno, void * user_data)
{
  oggz_set_read_callback (oggz, serialno, ignore_packet, NULL);
  read_packet (oggz, op, serialno, user_data);

  return -1;
}

static void
revert_file (char * infilename)
{
  OGGZ * oggz;
  FILE * infile;
  char line[80];
  unsigned int offset;
  long current_serialno = -1, serialno;
  ogg_int64_t granulepos, packetno;
  int bos = 0, eos = 0;

  int line_offset = 0, consumed = 0;

  unsigned char * packet = NULL;
  long max_bytes = 0;

  unsigned char buf[1024];
  ogg_packet op;
  int flush = 1;
  long n;
  char c;

  if (strcmp (infilename, "-") == 0) {
    infile = stdin;
  } else {
    infile = fopen (infilename, "r");
  }

  oggz = oggz_new (OGGZ_WRITE|OGGZ_NONSTRICT);

  while (fgets (line, 80, infile)) {
    if (sscanf (line, "%x: serialno %ld, granulepos %lld, packetno %lld%n",
		&offset, &serialno, &granulepos, &packetno,
		&line_offset) >= 4) {

      /* flush any existing packets */
      if (current_serialno != -1) {
	int ret;

#ifdef DEBUG	
	printf ("feeding packet (%010ld) %ld bytes\n",
		current_serialno, op.bytes);
#endif
	if ((ret = oggz_write_feed (oggz, &op, current_serialno, flush, NULL)) != 0) {
	  fprintf (stderr, "%s: oggz_write_feed error %d\n", progname, ret);
	}

	while ((n = oggz_write_output (oggz, buf, 1024)) > 0) {
	  fwrite (buf, 1, 1024, outfile);
	}
      }
      
      /* Start new packet */
      bos = 0; eos = 0;
      if (sscanf (&line[line_offset], " *** %[b]%[o]%[s]%n", &c, &c, &c,
		  &consumed) >= 3) {
	bos = 1;
	line_offset += consumed;
      }
      if (sscanf (&line[line_offset], " *** %[e]%[o]%[s]%n", &c, &c, &c,
		  &consumed) >= 3) {
	eos = 1;
	line_offset += consumed;
      }

      current_serialno = serialno;

      op.packet = packet;
      op.bytes = 0;
      op.b_o_s = bos;
      op.e_o_s = eos;
      op.granulepos = granulepos;
      op.packetno = packetno;

    } else {
      int nread = 0;
      unsigned int val = 0;
      unsigned int offset;

      if (current_serialno != -1 &&
	  sscanf (line, "%x:%n", &offset, &line_offset) >= 1) {
	while (nread < 16 &&
	       (sscanf (&line[line_offset], "%2x%n", &val, &consumed) > 0)) {
	  op.bytes++;
	  if (op.bytes > max_bytes) {
	    unsigned char * new_packet;
	    size_t new_size;

	    if (max_bytes == 0) {
	      new_size = 128;
	    } else {
	      new_size = max_bytes * 2;
	    }

	    new_packet =
	      (unsigned char *) realloc ((void *)packet, new_size);
	    if (new_packet == NULL) {
	      fprintf (stderr,
		       "%s: error allocating memory for packet data\n",
		       progname);
	      exit (1);
	    } else {
	      max_bytes = new_size;
	      packet = new_packet;
	      op.packet = packet;
	    }
	  }
	  
	  packet[op.bytes-1] = (unsigned char) val;

	  line_offset += consumed;
	  nread++;
	}
      }
    }
  }

  fclose (infile);
}

int
main (int argc, char ** argv)
{
  OGGZ * oggz;
  char * infilename = NULL, * outfilename = NULL;
  int revert = 0;
  OggzTable * table = NULL;
  long serialno;
  OggzReadPacket my_read_packet = read_packet;
  int i, size;
  long n;

  progname = argv[0];

  if (argc < 2) {
    printf ("usage: %s filename\n", progname);
  }

  table = oggz_table_new();

  while (1) {
    char * optstring = "hbxnro:s:OSGP";

#ifdef HAVE_GETOPT_LONG
    static struct option long_options[] = {
      {"help", no_argument, 0, 'h'},
      {"binary", no_argument, 0, 'b'},
      {"hexadecimal", no_argument, 0, 'x'},
      {"new", no_argument, 0, 'n'},
      {"revert", no_argument, 0, 'r'},
      {"output", required_argument, 0, 'o'},
      {"serialno", required_argument, 0, 's'},
      {"hide-offset", no_argument, 0, 'O'},
      {"hide-serialno", no_argument, 0, 'S'},
      {"hide-granulepos", no_argument, 0, 'G'},
      {"hide-packetno", no_argument, 0, 'P'},
      {0,0,0,0}
    };

    i = getopt_long(argc, argv, optstring, long_options, NULL);
#else
    i = getopt (argc, argv, optstring);
#endif
    if (i == -1) break;
    if (i == ':') {
      usage (progname);
      exit (1);
    }

    switch (i) {
    case 'h': /* help */
      usage (progname);
      exit (0);
      break;
    case 'b': /* binary */
      dump_bits = 1;
      break;
    case 'n': /* new */
      my_read_packet = read_new_packet;
      break;
    case 'o': /* output */
      outfilename = optarg;
      break;
    case 'r': /* revert */
      revert = 1;
      break;
    case 's': /* serialno */
      dump_all_serialnos = 0;
      serialno = atol (optarg);
      oggz_table_insert (table, serialno, &truth);
      break;
    case 'O': /* hide offset */
      hide_offset = 1;
      break;
    case 'S': /* hide serialno */
      hide_serialno = 1;
      break;
    case 'G': /* hide granulepos */
      hide_granulepos = 1;
      break;
    case 'P': /* hide packetno */
      hide_packetno = 1;
      break;
    default:
      break;
    }
  }

  if (optind >= argc) {
    usage (progname);
    exit (1);
  }

  infilename = argv[optind++];

  if (outfilename == NULL) {
    outfile = stdout;
  } else {
    outfile = fopen (outfilename, "w");
    if (outfile == NULL) {
      fprintf (stderr, "%s: unable to open output file %s\n",
	       progname, outfilename);
      exit (1);
    }
  }

  if (revert) {
    if (dump_bits) {
      fprintf (stderr, "%s: Revert of binary dump not supported\n", progname);
      exit (1);
    }

    revert_file (infilename);
  } else {
    errno = 0;

    if (strcmp (infilename, "-") == 0) {
      oggz = oggz_open_stdio (stdin, OGGZ_READ);
    } else {
      oggz = oggz_open (infilename, OGGZ_READ);
    }

    if (oggz == NULL) {
      if (errno == 0) {
	fprintf (stderr, "%s: %s: OGGZ error opening input file\n",
		 progname, infilename);
      } else {
	fprintf (stderr, "%s: %s: %s\n",
		 progname, infilename, strerror (errno));
      }
      exit (1);
    }

    if (dump_all_serialnos) {
      oggz_set_read_callback (oggz, -1, my_read_packet, NULL);
    } else {
      size = oggz_table_size (table);
      for (i = 0; i < size; i++) {
	oggz_table_nth (table, i, &serialno);
	oggz_set_read_callback (oggz, serialno, my_read_packet, NULL);
      }
    }
    
    while ((n = oggz_read (oggz, 1024)) > 0);
    
    oggz_close (oggz);
  }

  exit (0);
}