예제 #1
0
static gboolean
_send_event (GstElement * element, GstEvent * event)
{
  GstAggregator *self = GST_AGGREGATOR (element);

  GST_STATE_LOCK (element);
  if (GST_EVENT_TYPE (event) == GST_EVENT_SEEK &&
      GST_STATE (element) < GST_STATE_PAUSED) {
    gdouble rate;
    GstFormat fmt;
    GstSeekFlags flags;
    GstSeekType start_type, stop_type;
    gint64 start, stop;

    gst_event_parse_seek (event, &rate, &fmt, &flags, &start_type,
        &start, &stop_type, &stop);
    gst_segment_do_seek (&self->segment, rate, fmt, flags, start_type, start,
        stop_type, stop, NULL);

    self->priv->seqnum = gst_event_get_seqnum (event);
    GST_DEBUG_OBJECT (element, "Storing segment %" GST_PTR_FORMAT, event);
  }
  GST_STATE_UNLOCK (element);


  return GST_ELEMENT_CLASS (aggregator_parent_class)->send_event (element,
      event);
}
예제 #2
0
static gboolean
gst_rtmp_src_prepare_seek_segment (GstBaseSrc * basesrc, GstEvent * event,
    GstSegment * segment)
{
  GstRTMPSrc *src;
  GstSeekType cur_type, stop_type;
  gint64 cur, stop;
  GstSeekFlags flags;
  GstFormat format;
  gdouble rate;

  src = GST_RTMP_SRC (basesrc);

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

  if (!src->seekable) {
    GST_LOG_OBJECT (src, "Not a seekable stream");
    return FALSE;
  }

  if (!src->rtmp) {
    GST_LOG_OBJECT (src, "Not connected yet");
    return FALSE;
  }

  if (format != GST_FORMAT_TIME) {
    GST_LOG_OBJECT (src, "Seeking only supported in TIME format");
    return FALSE;
  }

  if (stop_type != GST_SEEK_TYPE_NONE) {
    GST_LOG_OBJECT (src, "Setting a stop position is not supported");
    return FALSE;
  }

  gst_segment_init (segment, GST_FORMAT_TIME);
  gst_segment_do_seek (segment, rate, format, flags, cur_type, cur, stop_type,
      stop, NULL);

  return TRUE;
}
예제 #3
0
static gboolean
gst_mms_prepare_seek_segment (GstBaseSrc * src, GstEvent * event,
    GstSegment * segment)
{
  GstSeekType cur_type, stop_type;
  gint64 cur, stop;
  GstSeekFlags flags;
  GstFormat seek_format;
  gdouble rate;

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

  if (seek_format != GST_FORMAT_BYTES && seek_format != GST_FORMAT_TIME) {
    GST_LOG_OBJECT (src, "Only byte or time seeking is supported");
    return FALSE;
  }

  if (stop_type != GST_SEEK_TYPE_NONE) {
    GST_LOG_OBJECT (src, "Stop seeking not supported");
    return FALSE;
  }

  if (cur_type != GST_SEEK_TYPE_NONE && cur_type != GST_SEEK_TYPE_SET) {
    GST_LOG_OBJECT (src, "Only absolute seeking is supported");
    return FALSE;
  }

  /* We would like to convert from GST_FORMAT_TIME to GST_FORMAT_BYTES here
     when needed, but we cannot as to do that we need to actually do the seek,
     so we handle this in do_seek instead. */

  /* FIXME implement relative seeking, we could do any needed relevant
     seeking calculations here (in seek_format metrics), before the re-init
     of the segment. */

  gst_segment_init (segment, seek_format);
  gst_segment_do_seek (segment, rate, seek_format, flags, cur_type, cur,
      stop_type, stop, NULL);

  return TRUE;
}
예제 #4
0
static gboolean
_do_seek (GstAggregator * self, GstEvent * event)
{
  gdouble rate;
  GstFormat fmt;
  GstSeekFlags flags;
  GstSeekType start_type, stop_type;
  gint64 start, stop;
  gboolean flush;
  gboolean res;
  GstAggregatorPrivate *priv = self->priv;

  gst_event_parse_seek (event, &rate, &fmt, &flags, &start_type,
      &start, &stop_type, &stop);

  GST_INFO_OBJECT (self, "starting SEEK");

  flush = flags & GST_SEEK_FLAG_FLUSH;

  if (flush) {
    g_atomic_int_set (&priv->pending_flush_start, TRUE);
    g_atomic_int_set (&priv->flush_seeking, TRUE);
  }

  gst_segment_do_seek (&self->segment, rate, fmt, flags, start_type, start,
      stop_type, stop, NULL);

  /* forward the seek upstream */
  res = _forward_event_to_all_sinkpads (self, event, flush);
  event = NULL;

  if (!res) {
    g_atomic_int_set (&priv->flush_seeking, FALSE);
    g_atomic_int_set (&priv->pending_flush_start, FALSE);
  }

  GST_INFO_OBJECT (self, "seek done, result: %d", res);

  return res;
}
예제 #5
0
static gboolean
gst_mms_do_seek (GstBaseSrc * src, GstSegment * segment)
{
  gint64 start;
  GstMMS *mmssrc = GST_MMS (src);

  if (segment->format == GST_FORMAT_TIME) {
    if (!mmsx_time_seek (NULL, mmssrc->connection,
            (double) segment->start / GST_SECOND)) {
      GST_LOG_OBJECT (mmssrc, "mmsx_time_seek() failed");
      return FALSE;
    }
    start = mmsx_get_current_pos (mmssrc->connection);
    GST_INFO_OBJECT (mmssrc, "sought to %" GST_TIME_FORMAT ", offset after "
        "seek: %" G_GINT64_FORMAT, GST_TIME_ARGS (segment->start), start);
  } else if (segment->format == GST_FORMAT_BYTES) {
    start = mmsx_seek (NULL, mmssrc->connection, segment->start, SEEK_SET);
    /* mmsx_seek will close and reopen the connection when seeking with the
       mmsh protocol, if the reopening fails this is indicated with -1 */
    if (start == -1) {
      GST_DEBUG_OBJECT (mmssrc, "connection broken during seek");
      return FALSE;
    }
    GST_INFO_OBJECT (mmssrc, "sought to: %" G_GINT64_FORMAT " bytes, "
        "result: %" G_GINT64_FORMAT, segment->start, start);
  } else {
    GST_DEBUG_OBJECT (mmssrc, "unsupported seek segment format: %s",
        GST_STR_NULL (gst_format_get_name (segment->format)));
    return FALSE;
  }
  gst_segment_init (segment, GST_FORMAT_BYTES);
  gst_segment_do_seek (segment, segment->rate, GST_FORMAT_BYTES,
      GST_SEEK_FLAG_NONE, GST_SEEK_TYPE_SET, start, GST_SEEK_TYPE_NONE,
      segment->stop, NULL);
  return TRUE;
}
예제 #6
0
static gboolean
gst_musepackdec_handle_seek_event (GstMusepackDec * dec, GstEvent * event)
{
  GstSeekType start_type, stop_type;
  GstSeekFlags flags;
  GstSegment segment;
  GstFormat format;
  gboolean flush;
  gdouble rate;
  gint64 start, stop;
  gint samplerate;

  gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
      &stop_type, &stop);

  if (format != GST_FORMAT_TIME && format != GST_FORMAT_DEFAULT) {
    GST_DEBUG_OBJECT (dec, "seek failed: only TIME or DEFAULT format allowed");
    return FALSE;
  }

  samplerate = g_atomic_int_get (&dec->rate);

  if (format == GST_FORMAT_TIME) {
    if (start_type != GST_SEEK_TYPE_NONE)
      start = gst_util_uint64_scale_int (start, samplerate, GST_SECOND);
    if (stop_type != GST_SEEK_TYPE_NONE)
      stop = gst_util_uint64_scale_int (stop, samplerate, GST_SECOND);
  }

  flush = ((flags & GST_SEEK_FLAG_FLUSH) == GST_SEEK_FLAG_FLUSH);

  if (flush)
    gst_pad_push_event (dec->srcpad, gst_event_new_flush_start ());
  else
    gst_pad_pause_task (dec->sinkpad);  /* not _stop_task()? */

  GST_PAD_STREAM_LOCK (dec->sinkpad);

  /* operate on segment copy until we know the seek worked */
  segment = dec->segment;

  gst_segment_do_seek (&segment, rate, GST_FORMAT_DEFAULT,
      flags, start_type, start, stop_type, stop, NULL);

  gst_pad_push_event (dec->sinkpad, gst_event_new_flush_stop (TRUE));

  GST_DEBUG_OBJECT (dec, "segment: [%" G_GINT64_FORMAT "-%" G_GINT64_FORMAT
      "] = [%" GST_TIME_FORMAT "-%" GST_TIME_FORMAT "]",
      segment.start, segment.stop,
      GST_TIME_ARGS (segment.start * GST_SECOND / dec->rate),
      GST_TIME_ARGS (segment.stop * GST_SECOND / dec->rate));

  GST_DEBUG_OBJECT (dec, "performing seek to sample %" G_GINT64_FORMAT,
      segment.start);

  if (segment.start >= segment.duration) {
    GST_WARNING_OBJECT (dec, "seek out of bounds");
    goto failed;
  }
  if (mpc_demux_seek_sample (dec->d, segment.start) != MPC_STATUS_OK)
    goto failed;

  if ((flags & GST_SEEK_FLAG_SEGMENT) == GST_SEEK_FLAG_SEGMENT) {
    GST_DEBUG_OBJECT (dec, "posting SEGMENT_START message");

    gst_element_post_message (GST_ELEMENT (dec),
        gst_message_new_segment_start (GST_OBJECT (dec), GST_FORMAT_TIME,
            gst_util_uint64_scale_int (segment.start, GST_SECOND, dec->rate)));
  }

  if (flush) {
    gst_pad_push_event (dec->srcpad, gst_event_new_flush_stop (TRUE));
  }

  segment.position = segment.start;
  dec->segment = segment;
  gst_musepackdec_send_newsegment (dec);

  GST_DEBUG_OBJECT (dec, "seek successful");

  gst_pad_start_task (dec->sinkpad,
      (GstTaskFunction) gst_musepackdec_loop, dec->sinkpad, NULL);

  GST_PAD_STREAM_UNLOCK (dec->sinkpad);

  return TRUE;

failed:
  {
    GST_WARNING_OBJECT (dec, "seek failed");
    GST_PAD_STREAM_UNLOCK (dec->sinkpad);
    return FALSE;
  }
}
static gboolean
gst_type_find_element_seek (GstTypeFindElement * typefind, GstEvent * event)
{
  GstSeekFlags flags;
  GstSeekType start_type, stop_type;
  GstFormat format;
  gboolean flush;
  gdouble rate;
  gint64 start, stop;
  GstSegment seeksegment = { 0, };

  gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
      &stop_type, &stop);

  /* we can only seek on bytes */
  if (format != GST_FORMAT_BYTES) {
    GST_DEBUG_OBJECT (typefind, "Can only seek on BYTES");
    return FALSE;
  }

  /* copy segment, we need this because we still need the old
   * segment when we close the current segment. */
  memcpy (&seeksegment, &typefind->segment, sizeof (GstSegment));

  GST_DEBUG_OBJECT (typefind, "configuring seek");
  gst_segment_do_seek (&seeksegment, rate, format, flags,
      start_type, start, stop_type, stop, NULL);

  flush = ! !(flags & GST_SEEK_FLAG_FLUSH);

  GST_DEBUG_OBJECT (typefind, "New segment %" GST_SEGMENT_FORMAT, &seeksegment);

  if (flush) {
    GST_DEBUG_OBJECT (typefind, "Starting flush");
    gst_pad_push_event (typefind->sink, gst_event_new_flush_start ());
    gst_pad_push_event (typefind->src, gst_event_new_flush_start ());
  } else {
    GST_DEBUG_OBJECT (typefind, "Non-flushing seek, pausing task");
    gst_pad_pause_task (typefind->sink);
  }

  /* now grab the stream lock so that streaming cannot continue, for
   * non flushing seeks when the element is in PAUSED this could block
   * forever. */
  GST_DEBUG_OBJECT (typefind, "Waiting for streaming to stop");
  GST_PAD_STREAM_LOCK (typefind->sink);

  if (flush) {
    GST_DEBUG_OBJECT (typefind, "Stopping flush");
    gst_pad_push_event (typefind->sink, gst_event_new_flush_stop (TRUE));
    gst_pad_push_event (typefind->src, gst_event_new_flush_stop (TRUE));
  }

  /* now update the real segment info */
  GST_DEBUG_OBJECT (typefind, "Committing new seek segment");
  memcpy (&typefind->segment, &seeksegment, sizeof (GstSegment));
  typefind->offset = typefind->segment.start;

  /* notify start of new segment */
  if (typefind->segment.flags & GST_SEGMENT_FLAG_SEGMENT) {
    GstMessage *msg;

    msg = gst_message_new_segment_start (GST_OBJECT (typefind),
        GST_FORMAT_BYTES, typefind->segment.start);
    gst_element_post_message (GST_ELEMENT (typefind), msg);
  }

  typefind->need_segment = TRUE;

  /* restart our task since it might have been stopped when we did the
   * flush. */
  gst_pad_start_task (typefind->sink,
      (GstTaskFunction) gst_type_find_element_loop, typefind->sink, NULL);

  /* streaming can continue now */
  GST_PAD_STREAM_UNLOCK (typefind->sink);

  return TRUE;
}
예제 #8
0
static gboolean
gst_wildmidi_do_seek (GstWildmidi * wildmidi, GstEvent * event)
{
  gdouble rate;
  GstFormat src_format, dst_format;
  GstSeekFlags flags;
  GstSeekType start_type, stop_type;
  gint64 start, stop;
  gboolean flush, update;
#ifdef HAVE_WILDMIDI_0_2_2
  gboolean accurate;
#endif
  gboolean res;
  unsigned long int sample;
  GstSegment *segment;

  if (!wildmidi->song)
    return FALSE;

  gst_event_parse_seek (event, &rate, &src_format, &flags,
      &start_type, &start, &stop_type, &stop);

  /* convert the input format to samples */
  dst_format = GST_FORMAT_DEFAULT;
  res = TRUE;
  if (start_type != GST_SEEK_TYPE_NONE) {
    res =
        gst_wildmidi_src_convert (wildmidi, src_format, start, &dst_format,
        &start);
  }
  if (res && stop_type != GST_SEEK_TYPE_NONE) {
    res =
        gst_wildmidi_src_convert (wildmidi, src_format, stop, &dst_format,
        &stop);
  }
  /* unsupported format */
  if (!res)
    return res;

  flush = ((flags & GST_SEEK_FLAG_FLUSH) == GST_SEEK_FLAG_FLUSH);
#ifdef HAVE_WILDMIDI_0_2_2
  accurate = ((flags & GST_SEEK_FLAG_ACCURATE) == GST_SEEK_FLAG_ACCURATE);
#endif

  if (flush) {
    GST_DEBUG ("performing flush");
    gst_pad_push_event (wildmidi->srcpad, gst_event_new_flush_start ());
  } else {
    gst_pad_stop_task (wildmidi->sinkpad);
  }

  segment = wildmidi->o_segment;

  GST_PAD_STREAM_LOCK (wildmidi->sinkpad);

  if (flush) {
    gst_pad_push_event (wildmidi->srcpad, gst_event_new_flush_stop (TRUE));
  }

  /* update the segment now */
  gst_segment_do_seek (segment, rate, dst_format, flags,
      start_type, start, stop_type, stop, &update);

  /* we need to seek to position in the segment now, sample will be updated */
  sample = segment->position;

  GST_OBJECT_LOCK (wildmidi);
#ifdef HAVE_WILDMIDI_0_2_2
  if (accurate) {
    WildMidi_SampledSeek (wildmidi->song, &sample);
  } else {
    WildMidi_FastSeek (wildmidi->song, &sample);
  }
#else
  WildMidi_FastSeek (wildmidi->song, &sample);
#endif

  GST_OBJECT_UNLOCK (wildmidi);

  segment->start = segment->time = segment->position = sample;

  gst_pad_push_event (wildmidi->srcpad,
      gst_wildmidi_get_new_segment_event (wildmidi, GST_FORMAT_TIME));

  gst_pad_start_task (wildmidi->sinkpad,
      (GstTaskFunction) gst_wildmidi_loop, wildmidi->sinkpad, NULL);

  wildmidi->discont = TRUE;
  GST_PAD_STREAM_UNLOCK (wildmidi->sinkpad);
  GST_DEBUG ("seek done");

  return TRUE;
}
예제 #9
0
static gboolean
gst_hls_demux_seek (GstAdaptiveDemux * demux, GstEvent * seek)
{
  GstHLSDemux *hlsdemux = GST_HLS_DEMUX_CAST (demux);
  GstFormat format;
  GstSeekFlags flags;
  GstSeekType start_type, stop_type;
  gint64 start, stop;
  gdouble rate;
  GList *walk, *current_file = NULL;
  GstClockTime current_pos, target_pos;
  gint64 current_sequence;
  GstM3U8MediaFile *file;
  guint64 bitrate;
  gboolean snap_before, snap_after, snap_nearest, keyunit;
  gboolean reverse;

  gst_event_parse_seek (seek, &rate, &format, &flags, &start_type, &start,
      &stop_type, &stop);

  bitrate = gst_hls_demux_get_bitrate (hlsdemux);

  /* properly cleanup pending decryption status */
  if (flags & GST_SEEK_FLAG_FLUSH) {
    gst_hls_demux_clear_pending_data (hlsdemux);
  }

  /* Use I-frame variants for trick modes */
  if (hlsdemux->client->main->iframe_lists && rate < -1.0
      && demux->segment.rate >= -1.0 && demux->segment.rate <= 1.0) {
    GError *err = NULL;

    GST_M3U8_CLIENT_LOCK (hlsdemux->client);
    /* Switch to I-frame variant */
    hlsdemux->client->main->current_variant =
        hlsdemux->client->main->iframe_lists;
    GST_M3U8_CLIENT_UNLOCK (hlsdemux->client);
    gst_m3u8_client_set_current (hlsdemux->client,
        hlsdemux->client->main->iframe_lists->data);
    gst_uri_downloader_reset (demux->downloader);
    if (!gst_hls_demux_update_playlist (hlsdemux, FALSE, &err)) {
      GST_ELEMENT_ERROR_FROM_ERROR (hlsdemux, "Could not switch playlist", err);
      return FALSE;
    }
    //hlsdemux->discont = TRUE;
    hlsdemux->do_typefind = TRUE;

    gst_hls_demux_change_playlist (hlsdemux, bitrate / ABS (rate), NULL);
  } else if (rate > -1.0 && rate <= 1.0 && (demux->segment.rate < -1.0
          || demux->segment.rate > 1.0)) {
    GError *err = NULL;
    GST_M3U8_CLIENT_LOCK (hlsdemux->client);
    /* Switch to normal variant */
    hlsdemux->client->main->current_variant = hlsdemux->client->main->lists;
    GST_M3U8_CLIENT_UNLOCK (hlsdemux->client);
    gst_m3u8_client_set_current (hlsdemux->client,
        hlsdemux->client->main->lists->data);
    gst_uri_downloader_reset (demux->downloader);
    if (!gst_hls_demux_update_playlist (hlsdemux, FALSE, &err)) {
      GST_ELEMENT_ERROR_FROM_ERROR (hlsdemux, "Could not switch playlist", err);
      return FALSE;
    }
    //hlsdemux->discont = TRUE;
    hlsdemux->do_typefind = TRUE;
    /* TODO why not continue using the same? that was being used up to now? */
    gst_hls_demux_change_playlist (hlsdemux, bitrate, NULL);
  }

  GST_M3U8_CLIENT_LOCK (hlsdemux->client);
  file = GST_M3U8_MEDIA_FILE (hlsdemux->client->current->files->data);
  current_sequence = file->sequence;
  current_pos = 0;
  reverse = rate < 0;
  target_pos = reverse ? stop : start;

  /* Snap to segment boundary. Improves seek performance on slow machines. */
  keyunit = ! !(flags & GST_SEEK_FLAG_KEY_UNIT);
  snap_nearest =
      (flags & GST_SEEK_FLAG_SNAP_NEAREST) == GST_SEEK_FLAG_SNAP_NEAREST;
  snap_before = ! !(flags & GST_SEEK_FLAG_SNAP_BEFORE);
  snap_after = ! !(flags & GST_SEEK_FLAG_SNAP_AFTER);

  /* FIXME: Here we need proper discont handling */
  for (walk = hlsdemux->client->current->files; walk; walk = walk->next) {
    file = walk->data;

    current_sequence = file->sequence;
    current_file = walk;
    if ((!reverse && snap_after) || snap_nearest) {
      if (current_pos >= target_pos)
        break;
      if (snap_nearest && target_pos - current_pos < file->duration / 2)
        break;
    } else if (reverse && snap_after) {
      /* check if the next fragment is our target, in this case we want to
       * start from the previous fragment */
      GstClockTime next_pos = current_pos + file->duration;

      if (next_pos <= target_pos && target_pos < next_pos + file->duration) {
        break;
      }
    } else if (current_pos <= target_pos
        && target_pos < current_pos + file->duration) {
      break;
    }
    current_pos += file->duration;
  }

  if (walk == NULL) {
    GST_DEBUG_OBJECT (demux, "seeking further than track duration");
    current_sequence++;
  }

  GST_DEBUG_OBJECT (demux, "seeking to sequence %u", (guint) current_sequence);
  hlsdemux->reset_pts = TRUE;
  hlsdemux->client->sequence = current_sequence;
  hlsdemux->client->current_file =
      current_file ? current_file : hlsdemux->client->current->files;
  hlsdemux->client->sequence_position = current_pos;
  GST_M3U8_CLIENT_UNLOCK (hlsdemux->client);

  /* Play from the end of the current selected segment */
  if (reverse && (snap_before || snap_after || snap_nearest))
    current_pos += file->duration;

  if (keyunit || snap_before || snap_after || snap_nearest) {
    if (!reverse)
      gst_segment_do_seek (&demux->segment, rate, format, flags, start_type,
          current_pos, stop_type, stop, NULL);
    else
      gst_segment_do_seek (&demux->segment, rate, format, flags, start_type,
          start, stop_type, current_pos, NULL);
  }

  return TRUE;
}
예제 #10
0
static gboolean
gst_raw_parse_handle_seek_pull (GstRawParse * rp, GstEvent * event)
{
  gdouble rate;
  GstFormat format;
  GstSeekFlags flags;
  GstSeekType start_type, stop_type;
  gint64 start, stop;
  gint64 last_stop;
  gboolean ret = FALSE;
  gboolean flush;
  GstSegment seeksegment;

  if (event) {
    gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
        &stop_type, &stop);

    /* convert input offsets to time */
    ret = gst_raw_parse_convert (rp, format, start, GST_FORMAT_TIME, &start);
    ret &= gst_raw_parse_convert (rp, format, stop, GST_FORMAT_TIME, &stop);
    if (!ret)
      goto convert_failed;

    GST_DEBUG_OBJECT (rp, "converted start - stop to time");

    format = GST_FORMAT_TIME;

    gst_event_unref (event);
  } else {
    format = GST_FORMAT_TIME;
    flags = 0;
  }

  flush = ((flags & GST_SEEK_FLAG_FLUSH) != 0);

  /* start flushing up and downstream so that the loop function pauses and we
   * can acquire the STREAM_LOCK. */
  if (flush) {
    GST_LOG_OBJECT (rp, "flushing");
    gst_pad_push_event (rp->sinkpad, gst_event_new_flush_start ());
    gst_pad_push_event (rp->srcpad, gst_event_new_flush_start ());
  } else {
    GST_LOG_OBJECT (rp, "pause task");
    gst_pad_pause_task (rp->sinkpad);
  }

  GST_PAD_STREAM_LOCK (rp->sinkpad);

  memcpy (&seeksegment, &rp->segment, sizeof (GstSegment));

  if (event) {
    /* configure the seek values */
    gst_segment_do_seek (&seeksegment, rate, format, flags,
        start_type, start, stop_type, stop, NULL);
  }

  /* get the desired position */
  last_stop = seeksegment.position;

  GST_LOG_OBJECT (rp, "seeking to %" GST_TIME_FORMAT,
      GST_TIME_ARGS (last_stop));

  /* convert the desired position to bytes */
  ret =
      gst_raw_parse_convert (rp, format, last_stop, GST_FORMAT_BYTES,
      &last_stop);

  /* prepare for streaming */
  if (flush) {
    GST_LOG_OBJECT (rp, "stop flush");
    gst_pad_push_event (rp->sinkpad, gst_event_new_flush_stop (TRUE));
    gst_pad_push_event (rp->srcpad, gst_event_new_flush_stop (TRUE));
  }

  if (ret) {
    /* seek done */

    /* Seek on a frame boundary */
    last_stop -= last_stop % rp->framesize;

    rp->offset = last_stop;
    rp->n_frames = last_stop / rp->framesize;

    GST_LOG_OBJECT (rp, "seeking to bytes %" G_GINT64_FORMAT, last_stop);

    memcpy (&rp->segment, &seeksegment, sizeof (GstSegment));

    if (rp->segment.flags & GST_SEEK_FLAG_SEGMENT) {
      gst_element_post_message (GST_ELEMENT_CAST (rp),
          gst_message_new_segment_start (GST_OBJECT_CAST (rp),
              rp->segment.format, rp->segment.position));
    }

    /* for deriving a stop position for the playback segment from the seek
     * segment, we must take the duration when the stop is not set */
    if ((stop = rp->segment.stop) == -1)
      stop = rp->segment.duration;

    GST_DEBUG_OBJECT (rp, "preparing newsegment from %" G_GINT64_FORMAT
        " to %" G_GINT64_FORMAT, rp->segment.start, stop);

    /* now replace the old segment so that we send it in the stream thread the
     * next time it is scheduled. */
    if (rp->start_segment)
      gst_event_unref (rp->start_segment);
    rp->start_segment = gst_event_new_segment (&rp->segment);
  }
  rp->discont = TRUE;

  GST_LOG_OBJECT (rp, "start streaming");
  gst_pad_start_task (rp->sinkpad, (GstTaskFunction) gst_raw_parse_loop, rp,
      NULL);

  GST_PAD_STREAM_UNLOCK (rp->sinkpad);

  return ret;

  /* ERRORS */
convert_failed:
  {
    GST_DEBUG_OBJECT (rp, "Seek failed: couldn't convert to byte positions");
    return FALSE;
  }
}
예제 #11
0
static gboolean
gst_real_audio_demux_handle_seek (GstRealAudioDemux * demux, GstEvent * event)
{
  GstFormat format;
  GstSeekFlags flags;
  GstSeekType cur_type, stop_type;
  gboolean flush, update;
  gdouble rate;
  guint64 seek_pos;
  gint64 cur, stop;

  if (!demux->seekable)
    goto not_seekable;

  if (demux->byterate_num == 0 || demux->byterate_denom == 0)
    goto no_bitrate;

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

  if (format != GST_FORMAT_TIME)
    goto only_time_format_supported;

  if (rate <= 0.0)
    goto cannot_do_backwards_playback;

  flush = ((flags & GST_SEEK_FLAG_FLUSH) != 0);

  GST_DEBUG_OBJECT (demux, "flush=%d, rate=%g", flush, rate);

  /* unlock streaming thread and make streaming stop */
  if (flush) {
    gst_pad_push_event (demux->sinkpad, gst_event_new_flush_start ());
    gst_pad_push_event (demux->srcpad, gst_event_new_flush_start ());
  } else {
    gst_pad_pause_task (demux->sinkpad);
  }

  GST_PAD_STREAM_LOCK (demux->sinkpad);

  gst_segment_do_seek (&demux->segment, rate, format, flags,
      cur_type, cur, stop_type, stop, &update);

  GST_DEBUG_OBJECT (demux, "segment: %" GST_SEGMENT_FORMAT, &demux->segment);

  seek_pos = gst_util_uint64_scale (demux->segment.start,
      demux->byterate_num, demux->byterate_denom * GST_SECOND);
  if (demux->packet_size > 0) {
    seek_pos -= seek_pos % demux->packet_size;
  }
  seek_pos += demux->data_offset;

  GST_DEBUG_OBJECT (demux, "seek_pos = %" G_GUINT64_FORMAT, seek_pos);

  /* stop flushing */
  gst_pad_push_event (demux->sinkpad, gst_event_new_flush_stop (TRUE));
  gst_pad_push_event (demux->srcpad, gst_event_new_flush_stop (TRUE));

  demux->offset = seek_pos;
  demux->need_newsegment = TRUE;

  /* notify start of new segment */
  if (demux->segment.flags & GST_SEEK_FLAG_SEGMENT) {
    gst_element_post_message (GST_ELEMENT (demux),
        gst_message_new_segment_start (GST_OBJECT (demux),
            GST_FORMAT_TIME, demux->segment.position));
  }

  demux->segment_running = TRUE;
  /* restart our task since it might have been stopped when we did the flush */
  gst_pad_start_task (demux->sinkpad,
      (GstTaskFunction) gst_real_audio_demux_loop, demux, NULL);

  /* streaming can continue now */
  GST_PAD_STREAM_UNLOCK (demux->sinkpad);

  return TRUE;

/* ERRORS */
not_seekable:
  {
    GST_DEBUG_OBJECT (demux, "seek failed: cannot seek in streaming mode");
    return FALSE;
  }
no_bitrate:
  {
    GST_DEBUG_OBJECT (demux, "seek failed: bitrate unknown");
    return FALSE;
  }
only_time_format_supported:
  {
    GST_DEBUG_OBJECT (demux, "can only seek in TIME format");
    return FALSE;
  }
cannot_do_backwards_playback:
  {
    GST_DEBUG_OBJECT (demux, "can only seek with positive rate, not %lf", rate);
    return FALSE;
  }
}
예제 #12
0
static gboolean
gst_image_freeze_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
    GstImageFreeze *self = GST_IMAGE_FREEZE (parent);
    gboolean ret;

    GST_LOG_OBJECT (pad, "Got %s event", GST_EVENT_TYPE_NAME (event));

    switch (GST_EVENT_TYPE (event)) {
    case GST_EVENT_NAVIGATION:
    case GST_EVENT_QOS:
    case GST_EVENT_LATENCY:
    case GST_EVENT_STEP:
        GST_DEBUG_OBJECT (pad, "Dropping event");
        gst_event_unref (event);
        ret = TRUE;
        break;
    case GST_EVENT_SEEK: {
        gdouble rate;
        GstFormat format;
        GstSeekFlags flags;
        GstSeekType start_type, stop_type;
        gint64 start, stop;
        gint64 last_stop;
        gboolean start_task;
        gboolean flush;

        gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
                              &stop_type, &stop);
        gst_event_unref (event);

        flush = ! !(flags & GST_SEEK_FLAG_FLUSH);

        if (format != GST_FORMAT_TIME && format != GST_FORMAT_DEFAULT) {
            GST_ERROR_OBJECT (pad, "Seek in invalid format: %s",
                              gst_format_get_name (format));
            ret = FALSE;
            break;
        }

        if (format == GST_FORMAT_DEFAULT) {
            format = GST_FORMAT_TIME;
            if (!gst_image_freeze_convert (self, GST_FORMAT_DEFAULT, start, &format,
                                           &start)
                    || !gst_image_freeze_convert (self, GST_FORMAT_DEFAULT, stop,
                                                  &format, &stop)
                    || start == -1 || stop == -1) {
                GST_ERROR_OBJECT (pad,
                                  "Failed to convert seek from DEFAULT format into TIME format");
                ret = FALSE;
                break;
            }
        }

        if (flush) {
            GstEvent *e;

            g_atomic_int_set (&self->seeking, 1);
            e = gst_event_new_flush_start ();
            gst_pad_push_event (self->srcpad, e);
        } else {
            gst_pad_pause_task (self->srcpad);
        }

        GST_PAD_STREAM_LOCK (self->srcpad);

        g_mutex_lock (&self->lock);

        gst_segment_do_seek (&self->segment, rate, format, flags, start_type,
                             start, stop_type, stop, NULL);
        self->need_segment = TRUE;
        last_stop = self->segment.position;

        start_task = self->buffer != NULL;
        g_mutex_unlock (&self->lock);

        if (flush) {
            GstEvent *e;

            e = gst_event_new_flush_stop (TRUE);
            gst_pad_push_event (self->srcpad, e);
            g_atomic_int_set (&self->seeking, 0);
        }

        if (flags & GST_SEEK_FLAG_SEGMENT) {
            GstMessage *m;

            m = gst_message_new_segment_start (GST_OBJECT (self),
                                               format, last_stop);
            gst_element_post_message (GST_ELEMENT (self), m);
        }

        GST_PAD_STREAM_UNLOCK (self->srcpad);

        GST_DEBUG_OBJECT (pad, "Seek successful");

        if (start_task) {
            g_mutex_lock (&self->lock);

            if (self->buffer != NULL)
                gst_pad_start_task (self->srcpad,
                                    (GstTaskFunction) gst_image_freeze_src_loop, self->srcpad, NULL);

            g_mutex_unlock (&self->lock);
        }

        ret = TRUE;
        break;
    }
    case GST_EVENT_FLUSH_START:
        gst_image_freeze_reset (self);
    /* fall through */
    default:
        ret = gst_pad_push_event (self->sinkpad, event);
        break;
    }

    return ret;
}
예제 #13
0
static gboolean
gst_midi_parse_perform_seek (GstMidiParse * midiparse, GstEvent * event)
{
  gboolean res = TRUE, tres;
  gdouble rate;
  GstFormat seek_format;
  GstSeekFlags flags;
  GstSeekType start_type, stop_type;
  gint64 start, stop;
  gboolean flush;
  gboolean update;
  GstSegment seeksegment;
  guint32 seqnum;
  GstEvent *tevent;

  GST_DEBUG_OBJECT (midiparse, "doing seek: %" GST_PTR_FORMAT, event);

  if (event) {
    gst_event_parse_seek (event, &rate, &seek_format, &flags,
        &start_type, &start, &stop_type, &stop);

    if (seek_format != GST_FORMAT_TIME)
      goto invalid_format;

    flush = flags & GST_SEEK_FLAG_FLUSH;
    seqnum = gst_event_get_seqnum (event);
  } else {
    flush = FALSE;
    /* get next seqnum */
    seqnum = gst_util_seqnum_next ();
  }

  /* send flush start */
  if (flush) {
    tevent = gst_event_new_flush_start ();
    gst_event_set_seqnum (tevent, seqnum);
    gst_pad_push_event (midiparse->srcpad, tevent);
  } else
    gst_pad_pause_task (midiparse->srcpad);

  /* grab streaming lock, this should eventually be possible, either
   * because the task is paused, our streaming thread stopped
   * or because our peer is flushing. */
  GST_PAD_STREAM_LOCK (midiparse->sinkpad);
  if (G_UNLIKELY (midiparse->seqnum == seqnum)) {
    /* we have seen this event before, issue a warning for now */
    GST_WARNING_OBJECT (midiparse, "duplicate event found %" G_GUINT32_FORMAT,
        seqnum);
  } else {
    midiparse->seqnum = seqnum;
    GST_DEBUG_OBJECT (midiparse, "seek with seqnum %" G_GUINT32_FORMAT, seqnum);
  }

  /* Copy the current segment info into the temp segment that we can actually
   * attempt the seek with. We only update the real segment if the seek succeeds. */
  memcpy (&seeksegment, &midiparse->segment, sizeof (GstSegment));

  /* now configure the final seek segment */
  if (event) {
    gst_segment_do_seek (&seeksegment, rate, seek_format, flags,
        start_type, start, stop_type, stop, &update);
  }

  /* Else, no seek event passed, so we're just (re)starting the
     current segment. */
  GST_DEBUG_OBJECT (midiparse, "segment configured from %" G_GINT64_FORMAT
      " to %" G_GINT64_FORMAT ", position %" G_GINT64_FORMAT,
      seeksegment.start, seeksegment.stop, seeksegment.position);

  /* do the seek, segment.position contains the new position. */
  res = gst_midi_parse_do_seek (midiparse, &seeksegment);

  /* and prepare to continue streaming */
  if (flush) {
    tevent = gst_event_new_flush_stop (TRUE);
    gst_event_set_seqnum (tevent, seqnum);
    /* send flush stop, peer will accept data and events again. We
     * are not yet providing data as we still have the STREAM_LOCK. */
    gst_pad_push_event (midiparse->srcpad, tevent);
  }

  /* if the seek was successful, we update our real segment and push
   * out the new segment. */
  if (res) {
    GST_OBJECT_LOCK (midiparse);
    memcpy (&midiparse->segment, &seeksegment, sizeof (GstSegment));
    GST_OBJECT_UNLOCK (midiparse);

    if (seeksegment.flags & GST_SEGMENT_FLAG_SEGMENT) {
      GstMessage *message;

      message = gst_message_new_segment_start (GST_OBJECT (midiparse),
          seeksegment.format, seeksegment.position);
      gst_message_set_seqnum (message, seqnum);

      gst_element_post_message (GST_ELEMENT (midiparse), message);
    }
    /* for deriving a stop position for the playback segment from the seek
     * segment, we must take the duration when the stop is not set */
    if ((stop = seeksegment.stop) == -1)
      stop = seeksegment.duration;

    midiparse->segment_pending = TRUE;
    midiparse->discont = TRUE;
  }

  /* and restart the task in case it got paused explicitly or by
   * the FLUSH_START event we pushed out. */
  tres =
      gst_pad_start_task (midiparse->sinkpad,
      (GstTaskFunction) gst_midi_parse_loop, midiparse->sinkpad, NULL);
  if (res && !tres)
    res = FALSE;

  /* and release the lock again so we can continue streaming */
  GST_PAD_STREAM_UNLOCK (midiparse->sinkpad);

  return res;

  /* ERROR */
invalid_format:
  {
    GST_DEBUG_OBJECT (midiparse, "Unsupported seek format %s",
        gst_format_get_name (seek_format));
    return FALSE;
  }
}
예제 #14
0
static gboolean
gst_adder_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
  GstAdder *adder;
  gboolean result;

  adder = GST_ADDER (parent);

  GST_DEBUG_OBJECT (pad, "Got %s event on src pad",
      GST_EVENT_TYPE_NAME (event));

  switch (GST_EVENT_TYPE (event)) {
    case GST_EVENT_SEEK:
    {
      GstSeekFlags flags;
      gdouble rate;
      GstSeekType start_type, stop_type;
      gint64 start, stop;
      GstFormat seek_format, dest_format;
      gboolean flush;

      /* parse the seek parameters */
      gst_event_parse_seek (event, &rate, &seek_format, &flags, &start_type,
          &start, &stop_type, &stop);

      if ((start_type != GST_SEEK_TYPE_NONE)
          && (start_type != GST_SEEK_TYPE_SET)) {
        result = FALSE;
        GST_DEBUG_OBJECT (adder,
            "seeking failed, unhandled seek type for start: %d", start_type);
        goto done;
      }
      if ((stop_type != GST_SEEK_TYPE_NONE) && (stop_type != GST_SEEK_TYPE_SET)) {
        result = FALSE;
        GST_DEBUG_OBJECT (adder,
            "seeking failed, unhandled seek type for end: %d", stop_type);
        goto done;
      }

      dest_format = adder->segment.format;
      if (seek_format != dest_format) {
        result = FALSE;
        GST_DEBUG_OBJECT (adder,
            "seeking failed, unhandled seek format: %d", seek_format);
        goto done;
      }

      flush = (flags & GST_SEEK_FLAG_FLUSH) == GST_SEEK_FLAG_FLUSH;

      /* check if we are flushing */
      if (flush) {
        /* flushing seek, start flush downstream, the flush will be done
         * when all pads received a FLUSH_STOP.
         * Make sure we accept nothing anymore and return WRONG_STATE.
         * We send a flush-start before, to ensure no streaming is done
         * as we need to take the stream lock.
         */
        gst_pad_push_event (adder->srcpad, gst_event_new_flush_start ());
        gst_collect_pads_set_flushing (adder->collect, TRUE);

        /* We can't send FLUSH_STOP here since upstream could start pushing data
         * after we unlock adder->collect.
         * We set flush_stop_pending to TRUE instead and send FLUSH_STOP after
         * forwarding the seek upstream or from gst_adder_collected,
         * whichever happens first.
         */
        GST_COLLECT_PADS_STREAM_LOCK (adder->collect);
        adder->flush_stop_pending = TRUE;
        GST_COLLECT_PADS_STREAM_UNLOCK (adder->collect);
        GST_DEBUG_OBJECT (adder, "mark pending flush stop event");
      }
      GST_DEBUG_OBJECT (adder, "handling seek event: %" GST_PTR_FORMAT, event);

      /* now wait for the collected to be finished and mark a new
       * segment. After we have the lock, no collect function is running and no
       * new collect function will be called for as long as we're flushing. */
      GST_COLLECT_PADS_STREAM_LOCK (adder->collect);
      /* clip position and update our segment */
      if (adder->segment.stop != -1) {
        adder->segment.position = adder->segment.stop;
      }
      gst_segment_do_seek (&adder->segment, rate, seek_format, flags,
          start_type, start, stop_type, stop, NULL);

      if (flush) {
        /* Yes, we need to call _set_flushing again *WHEN* the streaming threads
         * have stopped so that the cookie gets properly updated. */
        gst_collect_pads_set_flushing (adder->collect, TRUE);
      }
      GST_COLLECT_PADS_STREAM_UNLOCK (adder->collect);
      GST_DEBUG_OBJECT (adder, "forwarding seek event: %" GST_PTR_FORMAT,
          event);
      GST_DEBUG_OBJECT (adder, "updated segment: %" GST_SEGMENT_FORMAT,
          &adder->segment);

      /* we're forwarding seek to all upstream peers and wait for one to reply
       * with a newsegment-event before we send a newsegment-event downstream */
      g_atomic_int_set (&adder->new_segment_pending, TRUE);
      result = forward_event (adder, event, flush);
      if (!result) {
        /* seek failed. maybe source is a live source. */
        GST_DEBUG_OBJECT (adder, "seeking failed");
      }
      if (g_atomic_int_compare_and_exchange (&adder->flush_stop_pending,
              TRUE, FALSE)) {
        GST_DEBUG_OBJECT (adder, "pending flush stop");
        if (!gst_pad_push_event (adder->srcpad,
                gst_event_new_flush_stop (TRUE))) {
          GST_WARNING_OBJECT (adder, "Sending flush stop event failed");
        }
      }
      break;
    }
    case GST_EVENT_QOS:
      /* QoS might be tricky */
      result = FALSE;
      gst_event_unref (event);
      break;
    case GST_EVENT_NAVIGATION:
      /* navigation is rather pointless. */
      result = FALSE;
      gst_event_unref (event);
      break;
    default:
      /* just forward the rest for now */
      GST_DEBUG_OBJECT (adder, "forward unhandled event: %s",
          GST_EVENT_TYPE_NAME (event));
      result = forward_event (adder, event, FALSE);
      break;
  }

done:

  return result;
}