/* GStreamer
 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#include <string.h>
#include <gst/gst.h>

static gboolean verbose = FALSE;
static gboolean quiet = FALSE;

static void
entry_added (GstIndex * index, GstIndexEntry * entry)
{
  switch (entry->type) {
    case GST_INDEX_ENTRY_ID:
      g_print ("id %d describes writer %s\n", entry->id,
          GST_INDEX_ID_DESCRIPTION (entry));
      break;
    case GST_INDEX_ENTRY_FORMAT:
      g_print ("%d: registered format %d for %s\n", entry->id,
          GST_INDEX_FORMAT_FORMAT (entry), GST_INDEX_FORMAT_KEY (entry));
      break;
    case GST_INDEX_ENTRY_ASSOCIATION:
    {
      gint i;

      g_print ("%p, %d: %08x ", entry, entry->id,
          GST_INDEX_ASSOC_FLAGS (entry));
      for (i = 0; i < GST_INDEX_NASSOCS (entry); i++) {
        g_print ("%d %" G_GINT64_FORMAT " ", GST_INDEX_ASSOC_FORMAT (entry, i),
            GST_INDEX_ASSOC_VALUE (entry, i));
      }
      g_print ("\n");
      break;
    }
    default:
      break;
  }
}

typedef struct
{
  const gchar *padname;
  GstPad *target;
  GstElement *bin;
  GstElement *pipeline;
  GstIndex *index;
}
dyn_link;

static void
dynamic_link (GstPadTemplate * templ, GstPad * newpad, gpointer data)
{
  dyn_link *link = (dyn_link *) data;

  if (!strcmp (gst_pad_get_name (newpad), link->padname)) {
    gst_element_set_state (link->pipeline, GST_STATE_PAUSED);
    gst_bin_add (GST_BIN (link->pipeline), link->bin);
    gst_pad_link (newpad, link->target);
    gst_element_set_index (link->bin, link->index);
    gst_element_set_state (link->pipeline, GST_STATE_PLAYING);
  }
}

static void
setup_dynamic_linking (GstElement * pipeline,
    GstElement * element,
    const gchar * padname, GstPad * target, GstElement * bin, GstIndex * index)
{
  dyn_link *link;

  link = g_new0 (dyn_link, 1);
  link->padname = g_strdup (padname);
  link->target = target;
  link->bin = bin;
  link->pipeline = pipeline;
  link->index = index;

  g_signal_connect (G_OBJECT (element), "new-pad", G_CALLBACK (dynamic_link),
      link);
}

static GstElement *
make_mpeg_systems_pipeline (const gchar * path, GstIndex * index)
{
  GstElement *pipeline;
  GstElement *src, *demux;

  pipeline = gst_pipeline_new ("pipeline");

  src = gst_element_factory_make ("filesrc", "src");
  g_object_set (G_OBJECT (src), "location", path, NULL);

  demux = gst_element_factory_make ("mpegdemux", "demux");

  gst_bin_add (GST_BIN (pipeline), src);
  gst_bin_add (GST_BIN (pipeline), demux);

  if (index) {
    gst_element_set_index (pipeline, index);
  }

  gst_element_link_pads (src, "src", demux, "sink");

  return pipeline;
}

static GstElement *
make_mpeg_decoder_pipeline (const gchar * path, GstIndex * index)
{
  GstElement *pipeline;
  GstElement *src, *demux;
  GstElement *video_bin, *audio_bin;
  GstElement *video_decoder, *audio_decoder;

  pipeline = gst_pipeline_new ("pipeline");

  src = gst_element_factory_make ("filesrc", "src");
  g_object_set (G_OBJECT (src), "location", path, NULL);

  demux = gst_element_factory_make ("mpegdemux", "demux");

  gst_bin_add (GST_BIN (pipeline), src);
  gst_bin_add (GST_BIN (pipeline), demux);

  gst_element_link_pads (src, "src", demux, "sink");

  video_bin = gst_bin_new ("video_bin");
  video_decoder = gst_element_factory_make ("mpeg2dec", "video_decoder");

  gst_bin_add (GST_BIN (video_bin), video_decoder);

  setup_dynamic_linking (pipeline, demux, "video_00",
      gst_element_get_pad (video_decoder, "sink"), video_bin, index);

  audio_bin = gst_bin_new ("audio_bin");
  audio_decoder = gst_element_factory_make ("mad", "audio_decoder");

  setup_dynamic_linking (pipeline, demux, "audio_00",
      gst_element_get_pad (audio_decoder, "sink"), audio_bin, index);

  gst_bin_add (GST_BIN (audio_bin), audio_decoder);

  if (index) {
    gst_element_set_index (pipeline, index);
  }

  return pipeline;
}

static void
print_progress (GstPad * pad)
{
  gint i = 0;
  gchar status[53];
  GstFormat format;
  gboolean res;
  gint64 value;
  gint percent = 0;

  status[0] = '|';

  format = GST_FORMAT_PERCENT;
  res = gst_pad_query (pad, GST_QUERY_POSITION, &format, &value);
  if (res) {
    percent = value / (2 * GST_FORMAT_PERCENT_SCALE);
  }

  for (i = 0; i < percent; i++) {
    status[i + 1] = '=';
  }
  for (i = percent; i < 50; i++) {
    status[i + 1] = ' ';
  }
  status[51] = '|';
  status[52] = 0;

  g_print ("%s\r", status);
}

gint
main (gint argc, gchar * argv[])
{
  GstElement *pipeline;
  GstElement *src;
  GstPad *pad;
  GstIndex *index;
  gint count = 0;
  GstEvent *event;
  gboolean res;
  GstElement *sink;
  struct poptOption options[] = {
    {"verbose", 'v', POPT_ARG_NONE | POPT_ARGFLAG_STRIP, &verbose, 0,
        "Print index entries", NULL},
    {"quiet", 'q', POPT_ARG_NONE | POPT_ARGFLAG_STRIP, &quiet, 0,
        "don't print progress bar", NULL},
    POPT_TABLEEND
  };

  if (!gst_init_check_with_popt_table (&argc, &argv, options) || argc < 3) {
    g_print ("usage: %s [-v] <type> <filename>  \n"
        "  type can be: 0 mpeg_systems\n"
        "               1 mpeg_decoder\n"
        "  -v : report added index entries\n"
        "  -q : don't print progress\n", argv[0]);
    return -1;
  }

  /* create index that elements can fill */
  index = gst_index_factory_make ("memindex");
  if (index) {
    if (verbose)
      g_signal_connect (G_OBJECT (index), "entry-added",
          G_CALLBACK (entry_added), NULL);

    g_object_set (G_OBJECT (index), "resolver", 1, NULL);
  }

  /* construct pipeline */
  switch (atoi (argv[1])) {
    case 0:
      pipeline = make_mpeg_systems_pipeline (argv[2], index);
      break;
    case 1:
      pipeline = make_mpeg_decoder_pipeline (argv[2], index);
      break;
    default:
      g_print ("unknown type %d\n", atoi (argv[1]));
      return -1;
  }

  /* setup some default info/error handlers */
  g_signal_connect (G_OBJECT (pipeline), "deep-notify",
      G_CALLBACK (gst_element_default_deep_notify), NULL);
  g_signal_connect (G_OBJECT (pipeline), "error",
      G_CALLBACK (gst_element_default_error), NULL);

  /* get a pad to perform progress reporting on */
  src = gst_bin_get_by_name (GST_BIN (pipeline), "src");
  pad = gst_element_get_pad (src, "src");

  /* prepare for iteration */
  gst_element_set_state (pipeline, GST_STATE_PLAYING);

  g_print ("indexing %s...\n", argv[2]);
  /* run through the complete stream to let it generate an index */
  while (gst_bin_iterate (GST_BIN (pipeline))) {
    if (!quiet && (count % 1000 == 0)) {
      print_progress (pad);
    }
    count++;
  }
  g_print ("\n");

  /* bring to ready to restart the pipeline */
  gst_element_set_state (pipeline, GST_STATE_READY);
  gst_element_set_state (pipeline, GST_STATE_PAUSED);

  if (index)
    GST_OBJECT_FLAG_UNSET (index, GST_INDEX_WRITABLE);

  src = gst_bin_get_by_name (GST_BIN (pipeline), "video_decoder");

  {
    gint id;
    GstIndexEntry *entry;
    gint64 result;
    gint total_tm;

    gst_index_get_writer_id (index, GST_OBJECT (src), &id);

    entry = gst_index_get_assoc_entry (index, id, GST_INDEX_LOOKUP_BEFORE, 0,
        GST_FORMAT_TIME, G_MAXINT64);
    g_assert (entry);
    gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &result);
    total_tm = result * 60 / GST_SECOND;
    g_print ("total time = %.2fs\n", total_tm / 60.0);
  }

  pad = gst_element_get_pad (src, "src");
  sink = gst_element_factory_make ("fakesink", "sink");
  gst_element_link_pads (src, "src", sink, "sink");
  gst_bin_add (GST_BIN (pipeline), sink);

  g_print ("seeking %s...\n", argv[2]);
  event = gst_event_new_seek (GST_FORMAT_TIME |
      GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH, 5 * GST_SECOND);

  res = gst_pad_send_event (pad, event);
  if (!res) {
    g_warning ("seek failed");
  }

  gst_element_set_state (pipeline, GST_STATE_PLAYING);
  count = 0;
  while (gst_bin_iterate (GST_BIN (pipeline))) {
    if (!quiet && (count % 1000 == 0)) {
      print_progress (pad);
    }
    count++;
  }

  gst_element_set_state (pipeline, GST_STATE_NULL);

  return 1;
}