ext/resindvd/resindvdsrc.c

/* GStreamer
 * Copyright (C) 2008 Jan Schmidt <thaytan@noraisin.net>
 *
 * 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., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <string.h>

#include <gst/gst.h>
#include <gst/gst-i18n-plugin.h>

#include "resindvdsrc.h"

GST_DEBUG_CATEGORY_STATIC (rsndvdsrc_debug);
#define GST_CAT_DEFAULT rsndvdsrc_debug

#define DEFAULT_DEVICE "/dev/dvd"

#define GST_FLOW_WOULD_BLOCK GST_FLOW_CUSTOM_SUCCESS

#define CLOCK_BASE 9LL
#define CLOCK_FREQ CLOCK_BASE * 10000

#define MPEGTIME_TO_GSTTIME(time) (((time) * (GST_MSECOND/10)) / CLOCK_BASE)
#define GSTTIME_TO_MPEGTIME(time) (((time) * CLOCK_BASE) / (GST_MSECOND/10))

typedef enum
{
  RSN_NAV_RESULT_NONE,
  RSN_NAV_RESULT_HIGHLIGHT,
  RSN_NAV_RESULT_BRANCH
} RsnNavResult;

typedef enum
{
  RSN_NAV_ACTION_ACTIVATE,
  RSN_NAV_ACTION_LEFT,
  RSN_NAV_ACTION_RIGHT,
  RSN_NAV_ACTION_DOWN,
  RSN_NAV_ACTION_UP
} RsnNavAction;

enum
{
  /* FILL ME */
  LAST_SIGNAL
};

enum
{
  ARG_0,
  ARG_DEVICE
};

typedef struct
{
  GstBuffer *buffer;
  GstClockTime ts;
  GstClockTime running_ts;
} RsnDvdPendingNav;

static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
    GST_PAD_SRC,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS ("application/x-resin-dvd")
    );

/* Private seek format for private flushing */
static GstFormat rsndvd_format;

static void rsn_dvdsrc_register_extra (GType rsn_dvdsrc_type);

GST_BOILERPLATE_FULL (resinDvdSrc, rsn_dvdsrc, RsnPushSrc,
    RSN_TYPE_PUSH_SRC, rsn_dvdsrc_register_extra);

static gboolean read_vts_info (resinDvdSrc * src);

static void rsn_dvdsrc_set_property (GObject * object, guint prop_id,
    const GValue * value, GParamSpec * pspec);
static void rsn_dvdsrc_get_property (GObject * object, guint prop_id,
    GValue * value, GParamSpec * pspec);

static void rsn_dvdsrc_finalize (GObject * object);

static gboolean rsn_dvdsrc_start (RsnBaseSrc * bsrc);
static gboolean rsn_dvdsrc_stop (RsnBaseSrc * bsrc);
static gboolean rsn_dvdsrc_unlock (RsnBaseSrc * bsrc);
static gboolean rsn_dvdsrc_unlock_stop (RsnBaseSrc * bsrc);

static gboolean rsn_dvdsrc_prepare_seek (RsnBaseSrc * bsrc, GstEvent * event,
    GstSegment * segment);
static gboolean rsn_dvdsrc_do_seek (RsnBaseSrc * bsrc, GstSegment * segment);
static GstStateChangeReturn
rsn_dvdsrc_change_state (GstElement * element, GstStateChange transition);

static void rsn_dvdsrc_prepare_spu_stream_event (resinDvdSrc * src,
    guint8 phys_stream, gboolean forced_only);
static void rsn_dvdsrc_prepare_audio_stream_event (resinDvdSrc * src,
    guint8 phys_stream);
static gboolean rsn_dvdsrc_prepare_streamsinfo_event (resinDvdSrc * src);
static void rsn_dvdsrc_prepare_clut_change_event (resinDvdSrc * src,
    const guint32 * clut);
static void rsn_dvdsrc_update_highlight (resinDvdSrc * src);

static void rsn_dvdsrc_enqueue_nav_block (resinDvdSrc * src,
    GstBuffer * nav_buf, GstClockTime ts);
static void rsn_dvdsrc_activate_nav_block (resinDvdSrc * src,
    GstBuffer * nav_buf);
static void rsn_dvdsrc_clear_nav_blocks (resinDvdSrc * src);
static void rsn_dvdsrc_check_nav_blocks (resinDvdSrc * src);
static void rsn_dvdsrc_schedule_nav_cb (resinDvdSrc * src,
    RsnDvdPendingNav * next_nav);

static GstFlowReturn rsn_dvdsrc_create (RsnPushSrc * psrc, GstBuffer ** buf);
static gboolean rsn_dvdsrc_src_event (RsnBaseSrc * basesrc, GstEvent * event);
static gboolean rsn_dvdsrc_src_query (RsnBaseSrc * basesrc, GstQuery * query);

static GstClockTime ifotime_to_gsttime (dvd_time_t * ifo_time);

static GstClockTime
ifotime_to_gsttime (dvd_time_t * ifo_time)
{
  GstClockTime ts;
  guint frames;

  ts = 3600 * GST_SECOND * ifo_time->hour;
  ts += 60 * GST_SECOND * ifo_time->minute;
  ts += GST_SECOND * ifo_time->second;

  frames = ((ifo_time->frame_u >> 4) & 0x3) * 10;
  frames += (ifo_time->frame_u & 0xf);

  if (ifo_time->frame_u & 0x80)
    ts += GST_SECOND * frames / 30;
  else
    ts += GST_SECOND * frames / 25;

  return ts;
}

static void
rsn_dvdsrc_register_extra (GType rsn_dvdsrc_type)
{
  GST_DEBUG_CATEGORY_INIT (rsndvdsrc_debug, "rsndvdsrc", 0,
      "Resin DVD source element based on libdvdnav");

  rsndvd_format = gst_format_register ("rsndvdsrc-internal",
      "private Resin DVD src format");
}

static void
rsn_dvdsrc_base_init (gpointer gclass)
{
  static GstElementDetails element_details = {
    "Resin DVD Src",
    "Source/DVD",
    "DVD source element",
    "Jan Schmidt <thaytan@noraisin.net>"
  };
  GstElementClass *element_class = GST_ELEMENT_CLASS (gclass);

  gst_element_class_add_pad_template (element_class,
      gst_static_pad_template_get (&src_factory));
  gst_element_class_set_details (element_class, &element_details);
}

static void
rsn_dvdsrc_class_init (resinDvdSrcClass * klass)
{
  GObjectClass *gobject_class;
  GstElementClass *gstelement_class;
  RsnBaseSrcClass *gstbasesrc_class;
  RsnPushSrcClass *gstpush_src_class;

  gobject_class = (GObjectClass *) klass;
  gstelement_class = (GstElementClass *) klass;
  gstbasesrc_class = GST_BASE_SRC_CLASS (klass);
  gstpush_src_class = GST_PUSH_SRC_CLASS (klass);

  gobject_class->finalize = rsn_dvdsrc_finalize;
  gobject_class->set_property = rsn_dvdsrc_set_property;
  gobject_class->get_property = rsn_dvdsrc_get_property;

  gstelement_class->change_state = rsn_dvdsrc_change_state;

  gstbasesrc_class->start = GST_DEBUG_FUNCPTR (rsn_dvdsrc_start);
  gstbasesrc_class->stop = GST_DEBUG_FUNCPTR (rsn_dvdsrc_stop);
  gstbasesrc_class->unlock = GST_DEBUG_FUNCPTR (rsn_dvdsrc_unlock);
  gstbasesrc_class->unlock_stop = GST_DEBUG_FUNCPTR (rsn_dvdsrc_unlock_stop);
  gstbasesrc_class->event = GST_DEBUG_FUNCPTR (rsn_dvdsrc_src_event);
  gstbasesrc_class->query = GST_DEBUG_FUNCPTR (rsn_dvdsrc_src_query);
  gstbasesrc_class->prepare_seek_segment =
      GST_DEBUG_FUNCPTR (rsn_dvdsrc_prepare_seek);
  gstbasesrc_class->do_seek = GST_DEBUG_FUNCPTR (rsn_dvdsrc_do_seek);

  gstpush_src_class->create = GST_DEBUG_FUNCPTR (rsn_dvdsrc_create);

  g_object_class_install_property (gobject_class, ARG_DEVICE,
      g_param_spec_string ("device", "Device", "DVD device location",
          NULL, G_PARAM_READWRITE));
}

static void
rsn_dvdsrc_init (resinDvdSrc * rsndvdsrc, resinDvdSrcClass * gclass)
{
  rsndvdsrc->device = g_strdup (DEFAULT_DEVICE);
  rsndvdsrc->dvd_lock = g_mutex_new ();
  rsndvdsrc->branch_lock = g_mutex_new ();
  rsndvdsrc->branching = FALSE;
  rsndvdsrc->still_cond = g_cond_new ();

  rsn_base_src_set_format (GST_BASE_SRC (rsndvdsrc), GST_FORMAT_TIME);
}

static void
rsn_dvdsrc_finalize (GObject * object)
{
  resinDvdSrc *src = RESINDVDSRC (object);

  g_mutex_free (src->dvd_lock);
  g_mutex_free (src->branch_lock);
  g_cond_free (src->still_cond);

  gst_buffer_replace (&src->alloc_buf, NULL);
  gst_buffer_replace (&src->next_buf, NULL);

  G_OBJECT_CLASS (parent_class)->finalize (object);
}

static gboolean
rsn_dvdsrc_unlock (RsnBaseSrc * bsrc)
{
  resinDvdSrc *src = RESINDVDSRC (bsrc);

  g_mutex_lock (src->branch_lock);
  src->branching = TRUE;
  g_cond_broadcast (src->still_cond);
  g_mutex_unlock (src->branch_lock);

  return TRUE;
}

static gboolean
rsn_dvdsrc_unlock_stop (RsnBaseSrc * bsrc)
{
  resinDvdSrc *src = RESINDVDSRC (bsrc);

  g_mutex_lock (src->branch_lock);
  src->branching = FALSE;
  g_mutex_unlock (src->branch_lock);

  return TRUE;
}

static void
rsn_dvdsrc_set_property (GObject * object, guint prop_id,
    const GValue * value, GParamSpec * pspec)
{
  resinDvdSrc *src = RESINDVDSRC (object);

  switch (prop_id) {
    case ARG_DEVICE:
      GST_OBJECT_LOCK (src);
      g_free (src->device);
      if (g_value_get_string (value) == NULL)
        src->device = g_strdup (DEFAULT_DEVICE);
      else
        src->device = g_value_dup_string (value);
      GST_OBJECT_UNLOCK (src);
      g_print ("Device is now %s\n", src->device);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}

static void
rsn_dvdsrc_get_property (GObject * object, guint prop_id,
    GValue * value, GParamSpec * pspec)
{
  resinDvdSrc *src = RESINDVDSRC (object);

  switch (prop_id) {
    case ARG_DEVICE:
      GST_OBJECT_LOCK (src);
      g_value_set_string (value, src->device);
      GST_OBJECT_UNLOCK (src);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}

static gboolean
rsn_dvdsrc_start (RsnBaseSrc * bsrc)
{
  resinDvdSrc *src = RESINDVDSRC (bsrc);

  g_mutex_lock (src->dvd_lock);
  if (!read_vts_info (src)) {
    GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ,
        (_("Could not read title information for DVD.")), GST_ERROR_SYSTEM);
    goto fail;
  }

  if (dvdnav_open (&src->dvdnav, src->device) != DVDNAV_STATUS_OK) {
    GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL),
        (_("Failed to open DVD device '%s'."), src->device));
    goto fail;
  }

  src->running = TRUE;
  src->branching = FALSE;
  src->discont = TRUE;
  src->need_segment = TRUE;

  src->cur_position = GST_CLOCK_TIME_NONE;
  src->pgc_duration = GST_CLOCK_TIME_NONE;
  src->cur_start_ts = GST_CLOCK_TIME_NONE;
  src->cur_end_ts = GST_CLOCK_TIME_NONE;
  src->cur_vobu_base_ts = GST_CLOCK_TIME_NONE;

  src->vts_n = 0;
  src->in_menu = FALSE;

  src->active_button = -1;

  src->cur_spu_phys_stream = -1;
  src->cur_spu_forced_only = FALSE;
  memset (src->cur_clut, 0, sizeof (guint32) * 16);
  src->cur_audio_phys_stream = -1;

  g_mutex_unlock (src->dvd_lock);

  return TRUE;

fail:
  if (src->dvdnav) {
    dvdnav_close (src->dvdnav);
    src->dvdnav = NULL;
  }
  g_mutex_unlock (src->dvd_lock);
  return FALSE;
}

/* Use libdvdread to read and cache info from the IFO file about
 * streams in each VTS */
static gboolean
read_vts_info (resinDvdSrc * src)
{
  gint i;
  gint n_vts;

  if (src->vts_attrs) {
    g_array_free (src->vts_attrs, TRUE);
    src->vts_attrs = NULL;
  }

  if (src->dvdread)
    DVDClose (src->dvdread);

  src->dvdread = DVDOpen (src->device);
  if (src->dvdread == NULL)
    return FALSE;

  if (!(src->vmg_file = ifoOpen (src->dvdread, 0))) {
    GST_ERROR ("Can't open VMG ifo");
    return FALSE;
  }
  n_vts = src->vmg_file->vts_atrt->nr_of_vtss;
  memcpy (&src->vmgm_attr, src->vmg_file->vmgi_mat, sizeof (vmgi_mat_t));

  GST_DEBUG ("Reading IFO info for %d VTSs", n_vts);
  src->vts_attrs =
      g_array_sized_new (FALSE, TRUE, sizeof (vtsi_mat_t), n_vts + 1);
  if (!src->vts_attrs)
    return FALSE;
  g_array_set_size (src->vts_attrs, n_vts + 1);

  for (i = 1; i <= n_vts; i++) {
    ifo_handle_t *ifo = ifoOpen (src->dvdread, i);

    if (!ifo) {
      GST_ERROR ("Can't open VTS %d", i);
      return FALSE;
    }

    GST_DEBUG ("VTS %d, Menu has %d audio %d subpictures. "
        "Title has %d and %d", i,
        ifo->vtsi_mat->nr_of_vtsm_audio_streams,
        ifo->vtsi_mat->nr_of_vtsm_subp_streams,
        ifo->vtsi_mat->nr_of_vts_audio_streams,
        ifo->vtsi_mat->nr_of_vts_subp_streams);

    memcpy (&g_array_index (src->vts_attrs, vtsi_mat_t, i),
        ifo->vtsi_mat, sizeof (vtsi_mat_t));

    ifoClose (ifo);
  }

  return TRUE;
}

static gboolean
rsn_dvdsrc_stop (RsnBaseSrc * bsrc)
{
  resinDvdSrc *src = RESINDVDSRC (bsrc);
  gboolean ret = TRUE;

  g_mutex_lock (src->dvd_lock);

  if (src->nav_clock_id) {
    gst_clock_id_unschedule (src->nav_clock_id);
    gst_clock_id_unref (src->nav_clock_id);
    src->nav_clock_id = NULL;
  }
  rsn_dvdsrc_clear_nav_blocks (src);
  src->have_pci = FALSE;

  /* Clear any allocated output buffer */
  gst_buffer_replace (&src->alloc_buf, NULL);
  gst_buffer_replace (&src->next_buf, NULL);
  src->running = FALSE;

  if (src->streams_event) {
    gst_event_unref (src->streams_event);
    src->streams_event = NULL;
  }
  if (src->clut_event) {
    gst_event_unref (src->clut_event);
    src->clut_event = NULL;
  }
  if (src->spu_select_event) {
    gst_event_unref (src->spu_select_event);
    src->spu_select_event = NULL;
  }
  if (src->audio_select_event) {
    gst_event_unref (src->audio_select_event);
    src->audio_select_event = NULL;
  }
  if (src->highlight_event) {
    gst_event_unref (src->highlight_event);
    src->highlight_event = NULL;
  }

  if (src->dvdnav) {
    if (dvdnav_close (src->dvdnav) != DVDNAV_STATUS_OK) {
      GST_ELEMENT_ERROR (src, RESOURCE, CLOSE, (NULL),
          ("dvdnav_close failed: %s", dvdnav_err_to_string (src->dvdnav)));
      ret = FALSE;
    }
    src->dvdnav = NULL;
  }

  if (src->vmg_file) {
    ifoClose (src->vmg_file);
    src->vmg_file = NULL;
  }
  if (src->vts_file) {
    ifoClose (src->vts_file);
    src->vts_file = NULL;
  }
  if (src->dvdread) {
    DVDClose (src->dvdread);
    src->dvdread = NULL;
  }

  g_mutex_unlock (src->dvd_lock);

  return ret;
}

/* handle still events. Call with dvd_lock */
static gboolean
rsn_dvdsrc_do_still (resinDvdSrc * src, int duration)
{
  GstEvent *still_event;
  GstEvent *hl_event;
  GstStructure *s;
  GstEvent *seg_event;
  GstSegment *segment = &(GST_BASE_SRC (src)->segment);

  if (src->in_still_state == FALSE) {
    g_print ("**** STILL FRAME. Duration %d ****\n", duration);
    /* Send a close-segment event, and a dvd-still start
     * event, then sleep */
    s = gst_structure_new ("application/x-gst-dvd",
        "event", G_TYPE_STRING, "dvd-still",
        "still-state", G_TYPE_BOOLEAN, TRUE, NULL);
    still_event = gst_event_new_custom (GST_EVENT_CUSTOM_DOWNSTREAM, s);

    gst_segment_set_last_stop (segment, GST_FORMAT_TIME, src->cur_end_ts);

    seg_event = gst_event_new_new_segment_full (TRUE,
        segment->rate, segment->applied_rate, segment->format,
        segment->start, segment->last_stop, segment->time);

    /* Grab any pending highlight event to send too */
    hl_event = src->highlight_event;
    src->highlight_event = NULL;

    /* Now, send the events. We need to drop the dvd lock while doing so,
     * and then check after if we got flushed */
    g_mutex_unlock (src->dvd_lock);
    gst_pad_push_event (GST_BASE_SRC_PAD (src), still_event);
    gst_pad_push_event (GST_BASE_SRC_PAD (src), seg_event);
    if (hl_event) {
      g_print ("Sending highlight event before still\n");
      gst_pad_push_event (GST_BASE_SRC_PAD (src), hl_event);
    }
    g_mutex_lock (src->dvd_lock);

    g_mutex_lock (src->branch_lock);

    src->in_still_state = TRUE;
  } else {
    GST_DEBUG_OBJECT (src, "Re-entering still wait");
    g_mutex_lock (src->branch_lock);
  }

  if (src->branching) {
    GST_INFO_OBJECT (src, "Branching - aborting still");
    g_mutex_unlock (src->branch_lock);
    return TRUE;
  }

  if (duration == 255) {
    /*
     * The only way to get woken from this still is by a flushing
     * seek or a user action. Either one will clear the still, so
     * don't skip it
     */
    src->need_segment = TRUE;

    g_mutex_unlock (src->dvd_lock);
    GST_LOG_OBJECT (src, "Entering cond_wait still");
    g_cond_wait (src->still_cond, src->branch_lock);
    GST_LOG_OBJECT (src, "cond_wait still over, branching = %d",
        src->branching);

    if (src->branching) {
      g_mutex_unlock (src->branch_lock);
      g_mutex_lock (src->dvd_lock);
      return TRUE;
    }
    src->in_still_state = FALSE;

    g_mutex_unlock (src->branch_lock);
    g_mutex_lock (src->dvd_lock);
  } else {
    GTimeVal end_time;
    gboolean was_signalled;

    g_get_current_time (&end_time);
    g_time_val_add (&end_time, duration * G_USEC_PER_SEC);

    /* FIXME: Implement timed stills by sleeping on the clock, possibly
     * in multiple steps if we get paused/unpaused */
    g_mutex_unlock (src->dvd_lock);
    GST_LOG_OBJECT (src, "cond_timed_wait still");
    was_signalled =
        g_cond_timed_wait (src->still_cond, src->branch_lock, &end_time);
    was_signalled |= src->branching;

    g_mutex_unlock (src->branch_lock);
    g_mutex_lock (src->dvd_lock);

    if (was_signalled) {
      /* Signalled - must be flushing */
      GST_LOG_OBJECT (src,
          "cond_timed_wait still over. Signalled, branching = %d",
          src->branching);
      return TRUE;
    }

    /* Else timed out, end the still */
    GST_DEBUG_OBJECT (src,
        "Timed still of %d secs over, calling dvdnav_still_skip", duration);

    if (dvdnav_still_skip (src->dvdnav) != DVDNAV_STATUS_OK) {
      return FALSE;
    }

    /* Tell downstream the still is over.
     * Later: We'll only do this if the still isn't interrupted: */
    s = gst_structure_new ("application/x-gst-dvd",
        "event", G_TYPE_STRING, "dvd-still",
        "still-state", G_TYPE_BOOLEAN, FALSE, NULL);
    still_event = gst_event_new_custom (GST_EVENT_CUSTOM_DOWNSTREAM, s);

    g_mutex_unlock (src->dvd_lock);
    gst_pad_push_event (GST_BASE_SRC_PAD (src), still_event);
    g_mutex_lock (src->dvd_lock);
  }

  return TRUE;
}

static GstFlowReturn
rsn_dvdsrc_step (resinDvdSrc * src, gboolean have_dvd_lock)
{
  GstFlowReturn ret = GST_FLOW_OK;
  dvdnav_status_t dvdnav_ret;
  guint8 *data;
  gint event, len;

  /* Allocate an output buffer if there isn't a pending one */
  if (src->alloc_buf == NULL)
    src->alloc_buf = gst_buffer_new_and_alloc (DVD_VIDEO_LB_LEN);

  data = GST_BUFFER_DATA (src->alloc_buf);
  len = DVD_VIDEO_LB_LEN;

  dvdnav_ret = dvdnav_get_next_block (src->dvdnav, data, &event, &len);
  if (dvdnav_ret != DVDNAV_STATUS_OK)
    goto read_error;
  g_mutex_lock (src->branch_lock);
  if (src->branching)
    goto branching;
  g_mutex_unlock (src->branch_lock);

  switch (event) {
    case DVDNAV_BLOCK_OK:
      /* Data block that needs outputting */
      src->next_buf = src->alloc_buf;
      src->next_is_nav_block = FALSE;
      src->next_nav_ts = GST_CLOCK_TIME_NONE;
      src->alloc_buf = NULL;
      src->in_still_state = FALSE;
      break;
    case DVDNAV_NAV_PACKET:
    {
      pci_t *pci = dvdnav_get_current_nav_pci (src->dvdnav);
      GstClockTime new_start_ptm = MPEGTIME_TO_GSTTIME (pci->pci_gi.vobu_s_ptm);
      GstClockTime new_end_ptm = MPEGTIME_TO_GSTTIME (pci->pci_gi.vobu_e_ptm);
      GstClockTimeDiff new_base_time = ifotime_to_gsttime (&pci->pci_gi.e_eltm);
      gboolean discont = FALSE;

      src->in_still_state = FALSE;

      if (new_start_ptm != src->cur_end_ts)
        discont = TRUE;

      GST_LOG_OBJECT (src, "NAV packet start TS %" GST_TIME_FORMAT
          " end TS %" GST_TIME_FORMAT " base %" G_GINT64_FORMAT " %s",
          GST_TIME_ARGS (new_start_ptm), GST_TIME_ARGS (new_end_ptm),
          new_base_time, discont ? "discont" : "");

#if 0
      g_print ("NAV packet start TS %" GST_TIME_FORMAT
          " end TS %" GST_TIME_FORMAT " base %" G_GINT64_FORMAT " %s\n",
          GST_TIME_ARGS (new_start_ptm), GST_TIME_ARGS (new_end_ptm),
          new_base_time, discont ? "discont" : "");
#endif

      if (discont) {
        g_print ("NAV packet discont: cur_end_ts %" GST_TIME_FORMAT " != "
            " vobu_start_ptm: %" GST_TIME_FORMAT " base %" GST_TIME_FORMAT
            "\n",
            GST_TIME_ARGS (src->cur_end_ts),
            GST_TIME_ARGS (new_start_ptm), GST_TIME_ARGS (new_base_time));
        src->need_segment = TRUE;
      }

      src->cur_start_ts = new_start_ptm;
      src->cur_end_ts = new_end_ptm;
      src->cur_vobu_base_ts = new_base_time;

      /* NAV packet is also a data block that needs sending */
      src->next_buf = src->alloc_buf;
      src->alloc_buf = NULL;

      if (!src->have_pci || pci->hli.hl_gi.hli_ss != 2) {
        /* Store the nav packet for activation at the right moment
         * if we don't have a packet yet or the info has changed (hli_ss != 2)
         */
        if (pci->hli.hl_gi.hli_s_ptm != 0)
          new_start_ptm = MPEGTIME_TO_GSTTIME (pci->hli.hl_gi.hli_s_ptm);

        src->next_is_nav_block = TRUE;
        src->next_nav_ts = new_start_ptm;
      } else {
        src->next_is_nav_block = FALSE;
        src->next_nav_ts = GST_CLOCK_TIME_NONE;
      }

      break;
    }
    case DVDNAV_STOP:
      /* End of the disc. EOS */
      dvdnav_reset (src->dvdnav);
      ret = GST_FLOW_UNEXPECTED;
      break;
    case DVDNAV_STILL_FRAME:
    {
      dvdnav_still_event_t *info = (dvdnav_still_event_t *) data;

      if (!have_dvd_lock) {
        /* At a still frame but can't block, handle it later */
        return GST_FLOW_WOULD_BLOCK;
      }

      if (!rsn_dvdsrc_do_still (src, info->length))
        goto internal_error;

      g_mutex_lock (src->branch_lock);
      if (src->branching)
        goto branching;
      g_mutex_unlock (src->branch_lock);
      break;
    }
    case DVDNAV_WAIT:
      /* Drain out the queues so that the info on the screen matches
       * the VM state */
      if (have_dvd_lock) {
        /* FIXME: Drain out the queues */
        g_print ("****** FIXME: WAIT *****\n");
      }
      if (dvdnav_wait_skip (src->dvdnav) != DVDNAV_STATUS_OK)
        goto internal_error;
      break;
    case DVDNAV_CELL_CHANGE:{
      dvdnav_cell_change_event_t *event = (dvdnav_cell_change_event_t *) data;

      src->pgc_duration = MPEGTIME_TO_GSTTIME (event->pgc_length);
      src->cur_position = MPEGTIME_TO_GSTTIME (event->cell_start);

      GST_DEBUG_OBJECT (src,
          "CELL change dur now %" GST_TIME_FORMAT " position now %"
          GST_TIME_FORMAT, GST_TIME_ARGS (src->pgc_duration),
          GST_TIME_ARGS (src->cur_position));
      break;
    }
    case DVDNAV_SPU_CLUT_CHANGE:
      rsn_dvdsrc_prepare_clut_change_event (src, (const guint32 *) data);
      break;
    case DVDNAV_VTS_CHANGE:{
      dvdnav_vts_change_event_t *event = (dvdnav_vts_change_event_t *) data;

      g_print ("VTS change\n");
      if (dvdnav_is_domain_vmgm (src->dvdnav))
        src->vts_n = 0;
      else
        src->vts_n = event->new_vtsN;

      src->in_menu = !dvdnav_is_domain_vtsm (src->dvdnav);

      if (!dvdnav_is_domain_fp (src->dvdnav))
        rsn_dvdsrc_prepare_streamsinfo_event (src);

      break;
    }
    case DVDNAV_AUDIO_STREAM_CHANGE:{
      dvdnav_audio_stream_change_event_t *event =
          (dvdnav_audio_stream_change_event_t *) data;
      g_print ("cur audio stream change\n");
      GST_DEBUG_OBJECT (src, "  physical: %d", event->physical);
      GST_DEBUG_OBJECT (src, "  logical: %d", event->logical);

      rsn_dvdsrc_prepare_audio_stream_event (src, event->physical);
      break;
    }
    case DVDNAV_SPU_STREAM_CHANGE:{
      dvdnav_spu_stream_change_event_t *event =
          (dvdnav_spu_stream_change_event_t *) data;

      rsn_dvdsrc_prepare_spu_stream_event (src, event->physical_wide & 0x1f,
          (event->physical_wide & 0x80) ? TRUE : FALSE);

      GST_DEBUG_OBJECT (src, "  physical_wide: %d", event->physical_wide);
      GST_DEBUG_OBJECT (src, "  physical_letterbox: %d",
          event->physical_letterbox);
      GST_DEBUG_OBJECT (src, "  physical_pan_scan: %d",
          event->physical_pan_scan);
      GST_DEBUG_OBJECT (src, "  logical: %d", event->logical);
      break;
    }
    case DVDNAV_HIGHLIGHT:{
      rsn_dvdsrc_update_highlight (src);
      break;
    }
    case DVDNAV_HOP_CHANNEL:
      g_print ("Channel hop - User action\n");
      src->need_segment = TRUE;
      break;
    case DVDNAV_NOP:
      break;
    default:
      GST_WARNING_OBJECT (src, "Unknown dvdnav event %d", event);
      break;
  }

  if (src->highlight_event && have_dvd_lock) {
    GstEvent *hl_event = src->highlight_event;

    src->highlight_event = NULL;
    g_mutex_unlock (src->dvd_lock);
    g_print ("Sending highlight event - button %d\n", src->active_button);
    gst_pad_push_event (GST_BASE_SRC_PAD (src), hl_event);
    g_mutex_lock (src->dvd_lock);
  }

  return ret;
read_error:
  GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
      ("Failed to read next DVD block. Error: %s",
          dvdnav_err_to_string (src->dvdnav)));
  return GST_FLOW_ERROR;
internal_error:
  GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
      ("Internal error processing DVD commands. Error: %s",
          dvdnav_err_to_string (src->dvdnav)));
  return GST_FLOW_ERROR;
branching:
  g_mutex_unlock (src->branch_lock);
  return GST_FLOW_WRONG_STATE;
}

static GstFlowReturn
rsn_dvdsrc_prepare_next_block (resinDvdSrc * src, gboolean have_dvd_lock)
{
  GstFlowReturn ret;

  /* If buffer already ready, return */
  if (src->next_buf)
    return GST_FLOW_OK;

  do {
    ret = rsn_dvdsrc_step (src, have_dvd_lock);
  }
  while (ret == GST_FLOW_OK && src->next_buf == NULL);

  if (ret == GST_FLOW_WOULD_BLOCK)
    ret = GST_FLOW_OK;

  return ret;
}

static GstFlowReturn
rsn_dvdsrc_create (RsnPushSrc * psrc, GstBuffer ** outbuf)
{
  resinDvdSrc *src = RESINDVDSRC (psrc);
  GstSegment *segment = &(GST_BASE_SRC (src)->segment);
  GstFlowReturn ret;
  GstEvent *streams_event = NULL;
  GstEvent *clut_event = NULL;
  GstEvent *spu_select_event = NULL;
  GstEvent *audio_select_event = NULL;
  GstEvent *highlight_event = NULL;

  *outbuf = NULL;

  g_mutex_lock (src->dvd_lock);
  ret = rsn_dvdsrc_prepare_next_block (src, TRUE);
  if (ret != GST_FLOW_OK) {
    g_mutex_unlock (src->dvd_lock);
    return ret;
  }

  streams_event = src->streams_event;
  src->streams_event = NULL;

  spu_select_event = src->spu_select_event;
  src->spu_select_event = NULL;

  audio_select_event = src->audio_select_event;
  src->audio_select_event = NULL;

  clut_event = src->clut_event;
  src->clut_event = NULL;

  g_mutex_unlock (src->dvd_lock);

  /* Push in-band events now that we've dropped the dvd_lock, before
   * we change segment */
  if (streams_event) {
    g_print ("Pushing stream event\n");
    gst_pad_push_event (GST_BASE_SRC_PAD (src), streams_event);
  }
  if (clut_event) {
    g_print ("Pushing clut event\n");
    gst_pad_push_event (GST_BASE_SRC_PAD (src), clut_event);
  }
  /* Out of band events */
  if (spu_select_event) {
    g_print ("Pushing spu_select event\n");
    gst_pad_push_event (GST_BASE_SRC_PAD (src), spu_select_event);
  }
  if (audio_select_event) {
    g_print ("Pushing audio_select event\n");
    gst_pad_push_event (GST_BASE_SRC_PAD (src), audio_select_event);
  }

  if (src->need_segment) {
    /* Seamless segment update */
    GstEvent *seek;

    seek = gst_event_new_seek (segment->rate, rsndvd_format,
        GST_SEEK_FLAG_NONE, GST_SEEK_TYPE_NONE, -1, GST_SEEK_TYPE_NONE, -1);
    gst_element_send_event (GST_ELEMENT (src), seek);
    src->need_segment = FALSE;
  }

  g_mutex_lock (src->dvd_lock);

  if (src->cur_end_ts != GST_CLOCK_TIME_NONE)
    gst_segment_set_last_stop (segment, GST_FORMAT_TIME, src->cur_end_ts);

  if (src->next_buf != NULL) {
    /* Now that we're in the new segment, we can enqueue any nav packet
     * correctly */
    if (src->next_is_nav_block)
      rsn_dvdsrc_enqueue_nav_block (src, src->next_buf, src->next_nav_ts);

    *outbuf = src->next_buf;
    src->next_buf = NULL;

    if (src->discont) {
      g_print ("Discont packet\n");
      GST_BUFFER_FLAG_SET (*outbuf, GST_BUFFER_FLAG_DISCONT);
      src->discont = FALSE;
    }
  }

  highlight_event = src->highlight_event;
  src->highlight_event = NULL;

  /* Schedule a clock callback for the any pending nav packet */
  rsn_dvdsrc_check_nav_blocks (src);

  g_mutex_unlock (src->dvd_lock);

  if (highlight_event) {
    g_print ("Pushing highlight event with TS %" GST_TIME_FORMAT "\n",
        GST_TIME_ARGS (GST_EVENT_TIMESTAMP (highlight_event)));
    gst_pad_push_event (GST_BASE_SRC_PAD (src), highlight_event);
  }

  return ret;
}

static RsnNavResult
rsn_dvdsrc_perform_button_action (resinDvdSrc * src, RsnNavAction action)
{
  pci_t *pci;
  RsnNavResult result = RSN_NAV_RESULT_NONE;
  int button = 0;
  btni_t *btn_info;

  if (!src->have_pci)
    return RSN_NAV_RESULT_NONE;
  pci = &src->cur_pci;

  if (pci->hli.hl_gi.hli_ss == 0)
    return RSN_NAV_RESULT_NONE; /* No buttons at the moment */

  dvdnav_get_current_highlight (src->dvdnav, &button);

  if (button > pci->hli.hl_gi.btn_ns || button < 1)
    return RSN_NAV_RESULT_NONE; /* No valid button */

  btn_info = pci->hli.btnit + button - 1;

  switch (action) {
    case RSN_NAV_ACTION_ACTIVATE:
      if (dvdnav_button_activate (src->dvdnav, pci) == DVDNAV_STATUS_OK)
        result = RSN_NAV_RESULT_BRANCH;
      break;
    case RSN_NAV_ACTION_LEFT:
      if (dvdnav_left_button_select (src->dvdnav, pci) == DVDNAV_STATUS_OK) {
        if (btn_info->left &&
            pci->hli.btnit[btn_info->left - 1].auto_action_mode)
          result = RSN_NAV_RESULT_BRANCH;
        else
          result = RSN_NAV_RESULT_HIGHLIGHT;
      }
      break;
    case RSN_NAV_ACTION_RIGHT:
      if (dvdnav_right_button_select (src->dvdnav, pci) == DVDNAV_STATUS_OK) {
        if (btn_info->right &&
            pci->hli.btnit[btn_info->right - 1].auto_action_mode)
          result = RSN_NAV_RESULT_BRANCH;
        else
          result = RSN_NAV_RESULT_HIGHLIGHT;
      }
      break;
    case RSN_NAV_ACTION_DOWN:
      if (dvdnav_lower_button_select (src->dvdnav, pci) == DVDNAV_STATUS_OK) {
        if (btn_info->down &&
            pci->hli.btnit[btn_info->down - 1].auto_action_mode)
          result = RSN_NAV_RESULT_BRANCH;
        else
          result = RSN_NAV_RESULT_HIGHLIGHT;
      }
      break;
    case RSN_NAV_ACTION_UP:
      if (dvdnav_upper_button_select (src->dvdnav, pci) == DVDNAV_STATUS_OK) {
        if (btn_info->up && pci->hli.btnit[btn_info->up - 1].auto_action_mode)
          result = RSN_NAV_RESULT_BRANCH;
        else
          result = RSN_NAV_RESULT_HIGHLIGHT;
      }
      break;
  }

  if (result == RSN_NAV_RESULT_HIGHLIGHT)
    g_cond_broadcast (src->still_cond);

  return result;
}

static gboolean
rsn_dvdsrc_handle_navigation_event (resinDvdSrc * src, GstEvent * event)
{
  const GstStructure *s = gst_event_get_structure (event);
  const gchar *event_type;
  gboolean channel_hop = FALSE;
  gboolean have_lock = FALSE;
  GstEvent *hl_event = NULL;
  RsnNavResult nav_res = RSN_NAV_RESULT_NONE;

  if (s == NULL)
    return FALSE;
  event_type = gst_structure_get_string (s, "event");
  if (event_type == NULL)
    return FALSE;

  if (strcmp (event_type, "key-press") == 0) {
    const gchar *key = gst_structure_get_string (s, "key");

    if (key == NULL)
      return FALSE;

    GST_DEBUG ("dvdnavsrc got a keypress: %s", key);

    g_mutex_lock (src->dvd_lock);
    have_lock = TRUE;
    if (!src->running)
      goto not_running;

    if (g_str_equal (key, "Return")) {
      nav_res = rsn_dvdsrc_perform_button_action (src, RSN_NAV_ACTION_ACTIVATE);
    } else if (g_str_equal (key, "Left")) {
      nav_res = rsn_dvdsrc_perform_button_action (src, RSN_NAV_ACTION_LEFT);
    } else if (g_str_equal (key, "Right")) {
      nav_res = rsn_dvdsrc_perform_button_action (src, RSN_NAV_ACTION_RIGHT);
    } else if (g_str_equal (key, "Up")) {
      nav_res = rsn_dvdsrc_perform_button_action (src, RSN_NAV_ACTION_UP);
    } else if (g_str_equal (key, "Down")) {
      nav_res = rsn_dvdsrc_perform_button_action (src, RSN_NAV_ACTION_DOWN);
    } else if (g_str_equal (key, "m")) {
      if (dvdnav_menu_call (src->dvdnav, DVD_MENU_Escape) == DVDNAV_STATUS_OK)
        channel_hop = TRUE;
    } else if (g_str_equal (key, "t")) {
      if (dvdnav_menu_call (src->dvdnav, DVD_MENU_Title) == DVDNAV_STATUS_OK)
        channel_hop = TRUE;
    } else if (g_str_equal (key, "r")) {
      if (dvdnav_menu_call (src->dvdnav, DVD_MENU_Root) == DVDNAV_STATUS_OK)
        channel_hop = TRUE;
    } else if (g_str_equal (key, "comma")) {
      gint title = 0;
      gint part = 0;

      if (dvdnav_current_title_info (src->dvdnav, &title, &part) && title > 0
          && part > 1) {
        if (dvdnav_part_play (src->dvdnav, title, part - 1) ==
            DVDNAV_STATUS_ERR)
          dvdnav_prev_pg_search (src->dvdnav);
        channel_hop = TRUE;
      }
    } else if (g_str_equal (key, "period")) {
      dvdnav_next_pg_search (src->dvdnav);
      channel_hop = TRUE;
    } else {
      g_print ("Unknown keypress: %s\n", key);
    }

  } else if (strcmp (event_type, "mouse-move") == 0) {
    gdouble x, y;

    if (!gst_structure_get_double (s, "pointer_x", &x) ||
        !gst_structure_get_double (s, "pointer_y", &y))
      return FALSE;

    g_mutex_lock (src->dvd_lock);
    have_lock = TRUE;
    if (!src->running)
      goto not_running;

    if (src->have_pci &&
        dvdnav_mouse_select (src->dvdnav, &src->cur_pci, (int) x, (int) y) ==
        DVDNAV_STATUS_OK) {
      nav_res = RSN_NAV_RESULT_HIGHLIGHT;
    }
  } else if (strcmp (event_type, "mouse-button-release") == 0) {
    gdouble x, y;

    if (!gst_structure_get_double (s, "pointer_x", &x) ||
        !gst_structure_get_double (s, "pointer_y", &y))
      return FALSE;

    GST_DEBUG_OBJECT (src, "Got click at %g, %g", x, y);

    g_mutex_lock (src->dvd_lock);
    have_lock = TRUE;
    if (!src->running)
      goto not_running;

    if (src->have_pci &&
        dvdnav_mouse_activate (src->dvdnav, &src->cur_pci, (int) x, (int) y) ==
        DVDNAV_STATUS_OK) {
      nav_res = RSN_NAV_RESULT_BRANCH;
    }
  }

  if (have_lock) {
    if (nav_res != RSN_NAV_RESULT_NONE) {
      if (nav_res == RSN_NAV_RESULT_BRANCH) {
        src->active_highlight = TRUE;
        channel_hop = TRUE;
      }

      rsn_dvdsrc_update_highlight (src);
    }

    if (channel_hop) {
      GstEvent *seek;

      g_print ("flush and jump\n");
      g_mutex_lock (src->branch_lock);
      src->branching = TRUE;
      g_cond_broadcast (src->still_cond);
      g_mutex_unlock (src->branch_lock);

      hl_event = src->highlight_event;
      src->highlight_event = NULL;
      src->active_highlight = FALSE;

      g_mutex_unlock (src->dvd_lock);

      if (hl_event) {
        g_print ("Highlight change - button: %d\n", src->active_button);
        gst_pad_push_event (GST_BASE_SRC_PAD (src), hl_event);
      }

      /* Send ourselves a seek event to wake everything up and flush */
      seek = gst_event_new_seek (1.0, rsndvd_format, GST_SEEK_FLAG_FLUSH,
          GST_SEEK_TYPE_NONE, -1, GST_SEEK_TYPE_NONE, -1);
      gst_element_send_event (GST_ELEMENT (src), seek);

      g_mutex_lock (src->dvd_lock);

      rsn_dvdsrc_update_highlight (src);
    }

    hl_event = src->highlight_event;
    src->highlight_event = NULL;

    g_mutex_unlock (src->dvd_lock);

    if (hl_event) {
      g_print ("Highlight change - button: %d\n", src->active_button);
      gst_pad_push_event (GST_BASE_SRC_PAD (src), hl_event);
    }
  }

  return TRUE;
not_running:
  g_mutex_unlock (src->dvd_lock);
  GST_DEBUG_OBJECT (src, "Element not started. Ignoring navigation event");
  return FALSE;
}

static void
rsn_dvdsrc_prepare_audio_stream_event (resinDvdSrc * src, guint8 phys_stream)
{
  GstStructure *s;
  GstEvent *e;

  if (phys_stream == src->cur_audio_phys_stream)
    return;
  src->cur_audio_phys_stream = phys_stream;

  s = gst_structure_new ("application/x-gst-dvd",
      "event", G_TYPE_STRING, "dvd-set-audio-track",
      "physical-id", G_TYPE_INT, (gint) phys_stream, NULL);

  e = gst_event_new_custom (GST_EVENT_CUSTOM_DOWNSTREAM, s);

  if (src->audio_select_event)
    gst_event_unref (src->audio_select_event);
  src->audio_select_event = e;
}

static void
rsn_dvdsrc_prepare_spu_stream_event (resinDvdSrc * src, guint8 phys_stream,
    gboolean forced_only)
{
  GstStructure *s;
  GstEvent *e;

  if (phys_stream == src->cur_spu_phys_stream &&
      forced_only == src->cur_spu_forced_only) {
    g_print ("Not preparing SPU change\n");
    return;
  }
  src->cur_spu_phys_stream = phys_stream;
  src->cur_spu_forced_only = forced_only;

  s = gst_structure_new ("application/x-gst-dvd",
      "event", G_TYPE_STRING, "dvd-set-subpicture-track",
      "physical-id", G_TYPE_INT, (gint) phys_stream,
      "forced-only", G_TYPE_BOOLEAN, forced_only, NULL);

  e = gst_event_new_custom (GST_EVENT_CUSTOM_DOWNSTREAM, s);

  if (src->spu_select_event)
    gst_event_unref (src->spu_select_event);
  src->spu_select_event = e;
}

static gboolean
rsn_dvdsrc_prepare_streamsinfo_event (resinDvdSrc * src)
{
  vtsi_mat_t *vts_attr;
  video_attr_t *v_attr;
  audio_attr_t *a_attrs;
  subp_attr_t *s_attrs;
  gint n_audio, n_subp;
  GstStructure *s;
  GstEvent *e;
  gint i;
  gchar lang_code[3] = { '\0', '\0', '\0' };
  gchar *t;
  gboolean is_widescreen;

  if (src->vts_attrs == NULL || src->vts_n >= src->vts_attrs->len) {
    if (src->vts_attrs)
      GST_ERROR_OBJECT (src, "No stream info for VTS %d (have %d)", src->vts_n,
          src->vts_attrs->len);
    else
      GST_ERROR_OBJECT (src, "No stream info");
    return FALSE;
  }

  if (src->vts_n == 0) {
    /* VMGM info */
    vts_attr = NULL;
    v_attr = &src->vmgm_attr.vmgm_video_attr;
    a_attrs = &src->vmgm_attr.vmgm_audio_attr;
    n_audio = MIN (1, src->vmgm_attr.nr_of_vmgm_audio_streams);
    s_attrs = &src->vmgm_attr.vmgm_subp_attr;
    n_subp = MIN (1, src->vmgm_attr.nr_of_vmgm_subp_streams);
  } else if (src->in_menu) {
    /* VTSM attrs */
    vts_attr = &g_array_index (src->vts_attrs, vtsi_mat_t, src->vts_n);
    v_attr = &vts_attr->vtsm_video_attr;
    a_attrs = &vts_attr->vtsm_audio_attr;
    n_audio = vts_attr->nr_of_vtsm_audio_streams;
    s_attrs = &vts_attr->vtsm_subp_attr;
    n_subp = vts_attr->nr_of_vtsm_subp_streams;
  } else {
    /* VTS domain */
    vts_attr = &g_array_index (src->vts_attrs, vtsi_mat_t, src->vts_n);
    v_attr = &vts_attr->vts_video_attr;
    a_attrs = vts_attr->vts_audio_attr;
    n_audio = vts_attr->nr_of_vts_audio_streams;
    s_attrs = vts_attr->vts_subp_attr;
    n_subp = vts_attr->nr_of_vts_subp_streams;
  }

  /* build event */
  s = gst_structure_new ("application/x-gst-dvd",
      "event", G_TYPE_STRING, "dvd-lang-codes", NULL);
  e = gst_event_new_custom (GST_EVENT_CUSTOM_DOWNSTREAM, s);

  /* video */
  is_widescreen = (v_attr->display_aspect_ratio != 0);
  gst_structure_set (s, "video-pal-format", G_TYPE_BOOLEAN,
      (v_attr->video_format != 0), NULL);
  gst_structure_set (s, "video-widescreen", G_TYPE_BOOLEAN, is_widescreen,
      NULL);

  /* audio */
  if (n_audio == 0) {
    /* Always create at least one audio stream */
    gst_structure_set (s, "audio-0-format", G_TYPE_INT, (int) 0, NULL);
  }
  for (i = 0; i < n_audio; i++) {
    const audio_attr_t *a = a_attrs + i;

    t = g_strdup_printf ("audio-%d-format", i);
    gst_structure_set (s, t, G_TYPE_INT, (int) a->audio_format, NULL);
    g_free (t);

    GST_DEBUG_OBJECT (src, "Audio stream %d is format %d", i,
        (int) a->audio_format);

    if (a->lang_type) {
      t = g_strdup_printf ("audio-%d-language", i);
      lang_code[0] = (a->lang_code >> 8) & 0xff;
      lang_code[1] = a->lang_code & 0xff;
      gst_structure_set (s, t, G_TYPE_STRING, lang_code, NULL);
      g_free (t);

      GST_DEBUG_OBJECT (src, "Audio stream %d is language %s", i, lang_code);
    } else
      GST_DEBUG_OBJECT (src, "Audio stream %d - no language", i, lang_code);
  }

  /* subpictures */
  if (n_subp == 0) {
    /* Always create at least one subpicture stream */
    gst_structure_set (s, "subpicture-0-format", G_TYPE_INT, (int) 0, NULL);
    gst_structure_set (s, "subpicture-0-language", G_TYPE_STRING, "MENU", NULL);
  }
  for (i = 0; i < n_subp; i++) {
    const subp_attr_t *u = s_attrs + i;

    t = g_strdup_printf ("subpicture-%d-format", i);
    gst_structure_set (s, t, G_TYPE_INT, (int) 0, NULL);
    g_free (t);

    t = g_strdup_printf ("subpicture-%d-language", i);
    if (u->type) {
      lang_code[0] = (u->lang_code >> 8) & 0xff;
      lang_code[1] = u->lang_code & 0xff;
      gst_structure_set (s, t, G_TYPE_STRING, lang_code, NULL);
    } else {
      gst_structure_set (s, t, G_TYPE_STRING, "MENU", NULL);
    }
    g_free (t);

    GST_DEBUG_OBJECT (src, "Subpicture stream %d is language %s", i,
        lang_code[0] ? lang_code : "NONE");
  }

  if (src->streams_event)
    gst_event_unref (src->streams_event);
  src->streams_event = e;

  return TRUE;
}

static void
rsn_dvdsrc_prepare_clut_change_event (resinDvdSrc * src, const guint32 * clut)
{
  GstEvent *event;
  GstStructure *structure;
  gchar name[16];
  int i;

  if (memcmp (src->cur_clut, clut, sizeof (guint32) * 16) == 0)
    return;
  memcpy (src->cur_clut, clut, sizeof (guint32) * 16);

  structure = gst_structure_new ("application/x-gst-dvd",
      "event", G_TYPE_STRING, "dvd-spu-clut-change", NULL);

  /* Create a separate field for each value in the table. */
  for (i = 0; i < 16; i++) {
    sprintf (name, "clut%02d", i);
    gst_structure_set (structure, name, G_TYPE_INT, (int) clut[i], NULL);
  }

  /* Create the DVD event and put the structure into it. */
  event = gst_event_new_custom (GST_EVENT_CUSTOM_DOWNSTREAM, structure);

  GST_LOG_OBJECT (src, "pushing clut change event %" GST_PTR_FORMAT, event);

  if (src->clut_event)
    gst_event_unref (src->clut_event);
  src->clut_event = event;
}

/*
 * Check for a new highlighted area, and prepare an spu highlight event if
 * necessary.
 */
static void
rsn_dvdsrc_update_highlight (resinDvdSrc * src)
{
  int button = 0;
  pci_t *pci = &src->cur_pci;
  dvdnav_highlight_area_t area;
  int mode = 0;
  GstEvent *event = NULL;
  GstStructure *s;

  if (src->have_pci) {
    if (dvdnav_get_current_highlight (src->dvdnav, &button) != DVDNAV_STATUS_OK) {
      GST_ELEMENT_ERROR (src, LIBRARY, FAILED, (NULL),
          ("dvdnav_get_current_highlight: %s",
              dvdnav_err_to_string (src->dvdnav)));
      return;
    }

    if (pci->hli.hl_gi.hli_ss == 0 || (button > pci->hli.hl_gi.btn_ns) ||
        (button < 1)) {
      /* button is out of the range of possible buttons. */
      button = 0;
    }
  }

  if (button == 0) {
    /* No highlight available, or no button selected - clear the SPU */
    if (src->active_button != 0) {
      src->active_button = 0;

      s = gst_structure_new ("application/x-gst-dvd", "event",
          G_TYPE_STRING, "dvd-spu-reset-highlight", NULL);
      event = gst_event_new_custom (GST_EVENT_CUSTOM_DOWNSTREAM_OOB, s);
      if (src->highlight_event)
        gst_event_unref (src->highlight_event);
      src->highlight_event = event;
    }
    return;
  }

  if (src->active_highlight)
    mode = 1;

  if (dvdnav_get_highlight_area (pci, button, mode, &area) != DVDNAV_STATUS_OK) {
    GST_ELEMENT_ERROR (src, LIBRARY, FAILED, (NULL),
        ("dvdnav_get_highlight_area: %s", dvdnav_err_to_string (src->dvdnav)));
    return;
  }

  /* Check if we have a new button number, or a new highlight region. */
  if (button != src->active_button ||
      memcmp (&area, &(src->area), sizeof (dvdnav_highlight_area_t)) != 0) {
    memcpy (&(src->area), &area, sizeof (dvdnav_highlight_area_t));

    s = gst_structure_new ("application/x-gst-dvd", "event",
        G_TYPE_STRING, "dvd-spu-highlight",
        "button", G_TYPE_INT, (gint) button,
        "palette", G_TYPE_INT, (gint) area.palette,
        "sx", G_TYPE_INT, (gint) area.sx,
        "sy", G_TYPE_INT, (gint) area.sy,
        "ex", G_TYPE_INT, (gint) area.ex,
        "ey", G_TYPE_INT, (gint) area.ey, NULL);

    event = gst_event_new_custom (GST_EVENT_CUSTOM_DOWNSTREAM_OOB, s);

    if (src->active_button == 0) {
      /* When setting the button for the first time, take the
         timestamp into account. */
      GST_EVENT_TIMESTAMP (event) = MPEGTIME_TO_GSTTIME (area.pts);
    }

    src->active_button = button;

    g_print ("Setting highlight. Button %d @ %d,%d active %d"
        " palette 0x%x\n", button, area.sx, area.sy, mode, area.palette);

    if (src->highlight_event)
      gst_event_unref (src->highlight_event);
    src->highlight_event = event;
  }
}

static void
rsn_dvdsrc_enqueue_nav_block (resinDvdSrc * src, GstBuffer * nav_buf,
    GstClockTime ts)
{
  RsnDvdPendingNav *pend_nav = g_new0 (RsnDvdPendingNav, 1);
  GstSegment *seg = &(GST_BASE_SRC (src)->segment);

  pend_nav->buffer = gst_buffer_ref (nav_buf);
  pend_nav->ts = ts;
  pend_nav->running_ts = gst_segment_to_running_time (seg, GST_FORMAT_TIME, ts);

  if (src->pending_nav_blocks == NULL) {
    src->pending_nav_blocks = src->pending_nav_blocks_end =
        g_slist_append (src->pending_nav_blocks_end, pend_nav);
  } else {
    src->pending_nav_blocks_end =
        g_slist_append (src->pending_nav_blocks_end, pend_nav);
    src->pending_nav_blocks_end = g_slist_next (src->pending_nav_blocks_end);
  }

#if 0
  g_print ("Enqueued nav with TS %" GST_TIME_FORMAT " with run ts %"
      GST_TIME_FORMAT ". %d packs pending\n", GST_TIME_ARGS (ts),
      GST_TIME_ARGS (pend_nav->running_ts),
      g_slist_length (src->pending_nav_blocks));
#endif
}

static void
rsn_dvdsrc_activate_nav_block (resinDvdSrc * src, GstBuffer * nav_buf)
{
  int32_t forced_button;

  navRead_PCI (&src->cur_pci, GST_BUFFER_DATA (nav_buf) + 0x2d);
  src->have_pci = TRUE;

  forced_button = src->cur_pci.hli.hl_gi.fosl_btnn & 0x3f;

  if (forced_button != 0)
    dvdnav_button_select (src->dvdnav, &src->cur_pci, forced_button);

  /* highlight might change, let's check */
  rsn_dvdsrc_update_highlight (src);
  if (src->highlight_event)
    g_cond_broadcast (src->still_cond);
}

static void
rsn_dvdsrc_clear_nav_blocks (resinDvdSrc * src)
{
  while (src->pending_nav_blocks) {
    RsnDvdPendingNav *cur = (RsnDvdPendingNav *) src->pending_nav_blocks->data;

    gst_buffer_unref (cur->buffer);
    g_free (cur);

    src->pending_nav_blocks =
        g_slist_delete_link (src->pending_nav_blocks, src->pending_nav_blocks);
  }

  src->pending_nav_blocks_end = NULL;
}

static gboolean
rsn_dvdsrc_nav_clock_cb (GstClock * clock, GstClockTime time, GstClockID id,
    gpointer user_data)
{
  resinDvdSrc *src = (resinDvdSrc *) user_data;
  GstClockTime base_time = gst_element_get_base_time (GST_ELEMENT (src));

  GST_LOG_OBJECT (src, "NAV pack callback for TS %" GST_TIME_FORMAT " at ts %"
      GST_TIME_FORMAT, GST_TIME_ARGS (time),
      GST_TIME_ARGS (gst_clock_get_time (clock) - base_time));

  g_mutex_lock (src->dvd_lock);

  /* Destroy the clock id that caused this callback */
  if (src->nav_clock_id) {
    gst_clock_id_unref (src->nav_clock_id);
    src->nav_clock_id = NULL;
  }

  while (src->pending_nav_blocks) {
    RsnDvdPendingNav *cur = (RsnDvdPendingNav *) src->pending_nav_blocks->data;

    if (time < base_time + cur->running_ts)
      break;                    /* Next NAV is in the future */

    GST_DEBUG_OBJECT (src, "Activating nav pack for with TS %" GST_TIME_FORMAT
        " at running TS %" GST_TIME_FORMAT, GST_TIME_ARGS (cur->ts),
        GST_TIME_ARGS (cur->running_ts));
    rsn_dvdsrc_activate_nav_block (src, cur->buffer);

    gst_buffer_unref (cur->buffer);
    g_free (cur);

    src->pending_nav_blocks =
        g_slist_delete_link (src->pending_nav_blocks, src->pending_nav_blocks);
  }

  if (src->pending_nav_blocks == NULL)
    src->pending_nav_blocks_end = NULL;
  else {
    /* Schedule a next packet, if any */
    RsnDvdPendingNav *next_nav =
        (RsnDvdPendingNav *) src->pending_nav_blocks->data;
    rsn_dvdsrc_schedule_nav_cb (src, next_nav);
  }

  g_mutex_unlock (src->dvd_lock);

  return TRUE;
}

static void
rsn_dvdsrc_schedule_nav_cb (resinDvdSrc * src, RsnDvdPendingNav * next_nav)
{
  GstClock *clock;
  GstClockTime base_ts;

  GST_OBJECT_LOCK (src);
  if (GST_STATE (src) != GST_STATE_PLAYING) {
    GST_OBJECT_UNLOCK (src);
    return;                     /* Not in playing state yet */
  }

  clock = GST_ELEMENT_CLOCK (src);
  base_ts = GST_ELEMENT (src)->base_time;

  if (clock == NULL) {
    GST_OBJECT_UNLOCK (src);
    return;
  }
  gst_object_ref (clock);

  src->nav_clock_id = gst_clock_new_single_shot_id (clock,
      base_ts + next_nav->running_ts);

  GST_OBJECT_UNLOCK (src);

  GST_LOG_OBJECT (src, "Schedule nav pack for running TS %" GST_TIME_FORMAT,
      GST_TIME_ARGS (next_nav->running_ts));

  gst_clock_id_wait_async (src->nav_clock_id, rsn_dvdsrc_nav_clock_cb, src);
  gst_object_unref (clock);
}

static void
rsn_dvdsrc_check_nav_blocks (resinDvdSrc * src)
{
  RsnDvdPendingNav *next_nav;

  /* Make sure a callback is scheduled for the first nav packet */
  if (src->nav_clock_id != NULL)
    return;                     /* Something already scheduled */
  if (src->pending_nav_blocks == NULL)
    return;                     /* No nav blocks available yet */

  next_nav = (RsnDvdPendingNav *) src->pending_nav_blocks->data;

  rsn_dvdsrc_schedule_nav_cb (src, next_nav);
}

/* Use libdvdread to read and cache info from the IFO file about
 * streams in each VTS */
static gboolean
rsn_dvdsrc_src_event (RsnBaseSrc * basesrc, GstEvent * event)
{
  resinDvdSrc *src = RESINDVDSRC (basesrc);
  gboolean res;

  GST_LOG_OBJECT (src, "handling %s event", GST_EVENT_TYPE_NAME (event));

  switch (GST_EVENT_TYPE (event)) {
    case GST_EVENT_NAVIGATION:
      res = rsn_dvdsrc_handle_navigation_event (src, event);
      break;
    default:
      res = GST_BASE_SRC_CLASS (parent_class)->event (basesrc, event);
      break;
  }

  return res;
}

static GstStateChangeReturn
rsn_dvdsrc_change_state (GstElement * element, GstStateChange transition)
{
  GstStateChangeReturn ret;
  resinDvdSrc *src = RESINDVDSRC (element);

  ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
  if (ret == GST_STATE_CHANGE_FAILURE)
    return ret;

  switch (transition) {
    case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
      /* Kick off the NAV packet callback if needed */
      g_mutex_lock (src->dvd_lock);
      rsn_dvdsrc_check_nav_blocks (src);
      g_mutex_unlock (src->dvd_lock);
      break;
    case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
      /* Unschedule any NAV packet callback */
      g_mutex_lock (src->dvd_lock);
      if (src->nav_clock_id) {
        gst_clock_id_unschedule (src->nav_clock_id);
        gst_clock_id_unref (src->nav_clock_id);
        src->nav_clock_id = NULL;
      }
      g_mutex_unlock (src->dvd_lock);
      break;
    default:
      break;
  }

  return ret;
}

static gboolean
rsn_dvdsrc_src_query (RsnBaseSrc * basesrc, GstQuery * query)
{
  resinDvdSrc *src = RESINDVDSRC (basesrc);
  gboolean res = FALSE;
  GstFormat format;
  gint64 val;

  switch (GST_QUERY_TYPE (query)) {
    case GST_QUERY_DURATION:
      gst_query_parse_duration (query, &format, NULL);
      if (format == GST_FORMAT_TIME && src->pgc_duration != GST_CLOCK_TIME_NONE) {
        val = src->pgc_duration;
        gst_query_set_duration (query, format, val);
        res = TRUE;
      }
      break;
    default:
      res = GST_BASE_SRC_CLASS (parent_class)->query (basesrc, query);
      break;
  }

  return res;
}

static gboolean
rsn_dvdsrc_prepare_seek (RsnBaseSrc * bsrc, GstEvent * event,
    GstSegment * segment)
{
  resinDvdSrc *src = RESINDVDSRC (bsrc);
  GstSeekType cur_type, stop_type;
  gint64 cur, stop;
  GstSeekFlags flags;
  GstFormat seek_format;
  gdouble rate;
  gboolean update;

  gst_event_parse_seek (event, &rate, &seek_format, &flags,
      &cur_type, &cur, &stop_type, &stop);

  if (seek_format == rsndvd_format) {
    /* Seeks in our internal format are passed directly through to the do_seek
     * method. */
    gst_segment_init (segment, seek_format);
    gst_segment_set_seek (segment, rate, seek_format, flags, cur_type, cur,
        stop_type, stop, &update);

    if (flags & GST_SEEK_FLAG_FLUSH)
      src->flushing_seek = TRUE;

    return TRUE;
  }
  /* Don't allow bytes seeks - angle, time, chapter, title only is the plan */
  if (seek_format == GST_FORMAT_BYTES)
    return FALSE;

  /* Let basesrc handle other formats for now. FIXME: Implement angle,
   * chapter etc */
  return GST_BASE_SRC_CLASS (parent_class)->prepare_seek_segment (bsrc,
      event, segment);
}

static gboolean
rsn_dvdsrc_do_seek (RsnBaseSrc * bsrc, GstSegment * segment)
{
  resinDvdSrc *src = RESINDVDSRC (bsrc);
  gboolean ret = FALSE;

  if (segment->format == rsndvd_format) {
    ret = TRUE;
  } else {
    /* FIXME: Handle other formats: Time, title, chapter, angle */
    /* HACK to make initial seek work: */
    if (segment->format == GST_FORMAT_TIME) {
      ret = TRUE;
      src->discont = TRUE;
    }
  }

  if (ret) {
    /* The internal format has served its purpose of waking everything
     * up and flushing, now step to the next data block so we know our
     * position */
    /* Force a highlight update */
    src->active_button = -1;

    if (src->flushing_seek) {
      g_mutex_lock (src->dvd_lock);
      src->flushing_seek = FALSE;

      gst_buffer_replace (&src->next_buf, NULL);
      src->cur_start_ts = GST_CLOCK_TIME_NONE;
      src->cur_end_ts = GST_CLOCK_TIME_NONE;
      src->cur_vobu_base_ts = GST_CLOCK_TIME_NONE;
      src->have_pci = FALSE;
      if (src->nav_clock_id) {
        gst_clock_id_unschedule (src->nav_clock_id);
        gst_clock_id_unref (src->nav_clock_id);
        src->nav_clock_id = NULL;
      }
      rsn_dvdsrc_clear_nav_blocks (src);
      g_mutex_unlock (src->dvd_lock);
    }

    GST_LOG_OBJECT (src, "Entering prepare_next_block after seek");
    if (rsn_dvdsrc_prepare_next_block (src, FALSE) != GST_FLOW_OK)
      goto fail;
    GST_LOG_OBJECT (src, "prepare_next_block after seek done");

    segment->format = GST_FORMAT_TIME;
    /* The first TS output: */
    segment->last_stop = segment->start = src->cur_start_ts;

    /* time field = position is the 'logical' stream time here: */
    segment->time = 0;
    if (src->cur_position != GST_CLOCK_TIME_NONE)
      segment->time += src->cur_position;
    if (src->cur_vobu_base_ts != GST_CLOCK_TIME_NONE)
      segment->time += src->cur_vobu_base_ts;

    segment->stop = -1;
    segment->duration = -1;

    g_print ("seek completed. New start TS %" GST_TIME_FORMAT
        " pos %" GST_TIME_FORMAT "\n", GST_TIME_ARGS (segment->start),
        GST_TIME_ARGS (segment->time));

    src->need_segment = FALSE;
  }

  return ret;
fail:
  g_print ("Seek in format %d failed\n", segment->format);
  return FALSE;
}

gboolean
rsndvdsrc_init (GstPlugin * plugin)
{
  gboolean res;

  res = gst_element_register (plugin, "rsndvdsrc",
      GST_RANK_NONE, RESIN_TYPE_DVDSRC);

  return res;
}