/*

   Copyright (C) 2008 Annodex Association

   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 the Annodex Association 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 ASSOCIATION 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 <fcntl.h>

#include <getopt.h>

#include <errno.h>

#include "oggz/oggz.h"

#include "oggz_tools.h"

#define READ_SIZE 4096

static char * progname;

static void

usage (char * progname)

{

  printf ("Usage: %s [options] filename ...\n", progname);

  printf ("Sort the pages of an Ogg file in order of presentation time.\n");

  printf ("\nMiscellaneous options\n");

  printf ("  -o filename, --output filename\n");

  printf ("                         Specify output filename\n");

  printf ("  -h, --help             Display this help and exit\n");

  printf ("  -v, --version          Output version information and exit\n");

  printf ("  -V, --verbose          Verbose operation\n");

  printf ("\n");

  printf ("Please report bugs to <ogg-dev@xiph.org>\n");

}

static void

exit_out_of_memory (void)

{

  fprintf (stderr, "%s: Out of memory\n", progname);

  exit (1);

}

static void

checked_fwrite (const void *data, size_t size, size_t count, FILE *stream)

{

  int n = fwrite (data, size, count, stream);

  if ((size_t)n != count) {

    perror ("write failed");

    exit (1);

  }

}

typedef struct _OSData OSData;

typedef struct _OSInput OSInput;

typedef struct _OSITrack OSITrack;

struct _OSData {

  char * infilename;

  OggzTable * inputs;

  int verbose;

};

struct _OSInput {

  OSData * osdata;

  OGGZ * reader;

  long serialno;

  const ogg_page * og;

};

struct _OSITrack {

  long output_serialno;

};

static ogg_page *

_ogg_page_copy (const ogg_page * og)

{

  ogg_page * new_og;

  new_og = malloc (sizeof (*og));

  if (new_og == NULL) return NULL;

  new_og->header = malloc (og->header_len);

  if (new_og->header == NULL) {

    free (new_og);

    return NULL;

  }

  new_og->header_len = og->header_len;

  memcpy (new_og->header, og->header, og->header_len);

  new_og->body = malloc (og->body_len);

  if (new_og->body == NULL) {

    free (new_og->header);

    free (new_og);

    return NULL;

  }

  new_og->body_len = og->body_len;

  memcpy (new_og->body, og->body, og->body_len);

  return new_og;

}

static int

_ogg_page_free (const ogg_page * og)

{

  free (og->header);

  free (og->body);

  free ((ogg_page *)og);

  return 0;

}

static void

osinput_delete (OSInput * input)

{

  oggz_close (input->reader);

  free (input);

}

static OSData *

osdata_new (void)

{

  OSData * osdata;

  osdata = (OSData *) malloc (sizeof (OSData));

  if (osdata == NULL) return NULL;

  osdata->inputs = oggz_table_new ();

  if (osdata->inputs == NULL) {

    free (osdata);

    return NULL;

  }

  osdata->verbose = 0;

  return osdata;

}

static void

osdata_delete (OSData * osdata)

{

  OSInput * input;

  int i, ninputs;

  ninputs = oggz_table_size (osdata->inputs);

  for (i = 0; i < ninputs; i++) {

    input = (OSInput *) oggz_table_nth (osdata->inputs, i, NULL);

    osinput_delete (input);

  }

  oggz_table_delete (osdata->inputs);

  free (osdata);

}

static int

read_page (OGGZ * oggz, const ogg_page * og, long serialno, void * user_data)

{

  OSInput * input = (OSInput *) user_data;

  /* If this is the serialno that this input is tracking, stash it;

   * otherwise continue scanning the file */

  if (serialno == input->serialno) {

    ogg_page *iog;

    iog = _ogg_page_copy (og);

    if (iog == NULL) return OGGZ_STOP_ERR;

    /* If this page's granulepos should be -1 but isn't then fix that before

     * storing and sorting the page. */

    if(ogg_page_packets(iog)==0&&ogg_page_granulepos(iog)!=-1) {

      memset(iog->header+6,0xFF,8);

      ogg_page_checksum_set(iog);

    }

    input->og = iog;

    return OGGZ_STOP_OK;

  } else {

    return OGGZ_CONTINUE;

  }

}

static int

read_page_add_input (OGGZ * oggz, const ogg_page * og, long serialno,

                     void * user_data)

{

  OSData * osdata = (OSData *)user_data;

  OSInput * input;

  int is_bos, nfiles;

#ifdef OGG_H_CONST_CORRECT

  is_bos = ogg_page_bos (og);

#else

  is_bos = ogg_page_bos ((ogg_page *)og);

#endif

  if (is_bos) {

    input = (OSInput *) malloc (sizeof (OSInput));

    if (input == NULL) return OGGZ_STOP_ERR;

    input->osdata = osdata;

    input->reader = oggz_open (osdata->infilename, OGGZ_READ|OGGZ_AUTO);

    if (input->reader == NULL) {

      free (input);

      return OGGZ_STOP_ERR;

    }

    input->serialno = serialno;

    input->og = NULL;

    oggz_set_read_page (input->reader, -1, read_page, input);

    nfiles = oggz_table_size (osdata->inputs);

    if (!oggz_table_insert (osdata->inputs, nfiles++, input)) {

      osinput_delete (input);

      return OGGZ_STOP_ERR;

    }

    return OGGZ_CONTINUE;

  } else {

    return OGGZ_STOP_OK;

  }

}

static int

osdata_add_file (OSData * osdata, char * infilename)

{

  OGGZ * reader;

  osdata->infilename = infilename;

  if ((reader = oggz_open (infilename, OGGZ_READ|OGGZ_AUTO)) != NULL) {

    oggz_set_read_page (reader, -1, read_page_add_input, osdata);

    oggz_run (reader);

    oggz_close (reader);

    return 0;

  } else {

    return -1;

  }

}

static int

oggz_sort (OSData * osdata, FILE * outfile)

{

  OSInput * input;

  int ninputs, i, min_i;

  long key, n;

  ogg_int64_t units, min_units;

  const ogg_page * og;

  int active;

  /* For theora+vorbis, ensure theora bos is first */

  int careful_for_theora = 0;

  int v;

  if (oggz_table_size (osdata->inputs) == 2)

    careful_for_theora = 1;

  while ((ninputs = oggz_table_size (osdata->inputs)) > 0) {

    min_units = -1;

    min_i = -1;

    active = 1;

    if (osdata->verbose)

      printf ("------------------------------------------------------------\n");

    /* Reload all pages, and find the min (earliest) */

    for (i = 0; active && i < oggz_table_size (osdata->inputs); i++) {

      input = (OSInput *) oggz_table_nth (osdata->inputs, i, &key);

      if (input != NULL) {

	while (input && input->og == NULL) {

	  n = oggz_read (input->reader, READ_SIZE);

	  if (n == 0) {

	    oggz_table_remove (osdata->inputs, key);

	    osinput_delete (input);

	    input = NULL;

	  } else if (n == OGGZ_ERR_STOP_ERR) {

            exit_out_of_memory();

	  }

	}

	if (input && input->og) {

	  if (ogg_page_bos ((ogg_page *)input->og)) {

	    min_i = i;

	    if (careful_for_theora) {

	      if (i == 0 && oggz_stream_get_content (input->reader, input->serialno) == OGGZ_CONTENT_VORBIS)

		careful_for_theora = 0;

	      else

		active = 0;

	    } else {

	      active = 0;

	    }

          }

	  units = oggz_tell_units (input->reader);

	  if (osdata->verbose) {

	    ot_fprint_time (stdout, (double)units/1000);

	    printf (": Got index %d serialno %010u %lld units: ",

		    i, ogg_page_serialno ((ogg_page *)input->og), (long long) units);

	  }

	  if (min_units == -1 || units == 0 ||

	      (units > -1 && units < min_units)) {

	    min_units = units;

	    min_i = i;

	    if (osdata->verbose)

	      printf ("Min\n");

	  } else {

	    if (osdata->verbose)

	      printf ("Moo\n");

	  }

	} else if (osdata->verbose) {

	  if (input == NULL) {

	    printf ("*** index %d NULL\n", i);

	  } else {

	    printf ("*** No page from index %d\n", i);

	  }

	}

      }

    }

    if (osdata->verbose)

      printf ("Min index %d\n", min_i);

    /* Write the earliest page */

    if (min_i != -1) {

      input = (OSInput *) oggz_table_nth (osdata->inputs, min_i, &key);

      og = input->og;

      checked_fwrite (og->header, 1, og->header_len, outfile);

      checked_fwrite (og->body, 1, og->body_len, outfile);

      _ogg_page_free (og);

      input->og = NULL;

    }

  }

  return 0;

}

int

main (int argc, char * argv[])

{

  int show_version = 0;

  int show_help = 0;

  char * infilename = NULL, * outfilename = NULL;

  FILE * infile = NULL, * outfile = NULL;

  OSData * osdata;

  int i;

  char * optstring = "hvVo:";

#ifdef HAVE_GETOPT_LONG

  static struct option long_options[] = {

    {"help", no_argument, 0, 'h'},

    {"version", no_argument, 0, 'v'},

    {"verbose", no_argument, 0, 'V'},

    {"output", required_argument, 0, 'o'},

    {0,0,0,0}

  };

#endif

  ot_init ();

  progname = argv[0];

  if (argc < 2) {

    usage (progname);

    return (1);

  }

  if (!strncmp (argv[1], "-?", 2)) {

#ifdef HAVE_GETOPT_LONG

    ot_print_options (long_options, optstring);

#else

    ot_print_short_options (optstring);

#endif

    exit (0);

  }

  osdata = osdata_new();

  if (osdata == NULL)

    exit_out_of_memory();

  while (1) {

#ifdef HAVE_GETOPT_LONG

    i = getopt_long (argc, argv, optstring, long_options, NULL);

#else

    i = getopt (argc, argv, optstring);

#endif

    if (i == -1) break;

    if (i == ':') {

      usage (progname);

      goto exit_err;

    }

    switch (i) {

    case 'h': /* help */

      show_help = 1;

      break;

    case 'v': /* version */

      show_version = 1;

      break;

    case 'o': /* output */

      outfilename = optarg;

      break;

    case 'V': /* verbose */

      osdata->verbose = 1;

    default:

      break;

    }

  }

  if (show_version) {

    printf ("%s version " VERSION "\n", progname);

  }

  if (show_help) {

    usage (progname);

  }

  if (show_version || show_help) {

    goto exit_ok;

  }

  if (optind >= argc) {

    usage (progname);

    goto exit_err;

  }

  infilename = argv[optind++];

  if (osdata_add_file (osdata, infilename) == -1) {

    fprintf (stderr, "%s: unable to open input file %s\n",

             progname, infilename);

    goto exit_err;

  }

  if (outfilename == NULL) {

    outfile = stdout;

  } else {

    outfile = fopen (outfilename, "wb");

    if (outfile == NULL) {

      fprintf (stderr, "%s: unable to open output file %s\n",

	       progname, outfilename);

      goto exit_err;

    }

  }

  oggz_sort (osdata, outfile);

 exit_ok:

  osdata_delete (osdata);

  exit (0);

 exit_err:

  osdata_delete (osdata);

  exit (1);

}