Example #1
0
static void
gst_wavpack_dec_post_tags (GstWavpackDec * dec)
{
    GstTagList *list;
    GstFormat format_time = GST_FORMAT_TIME, format_bytes = GST_FORMAT_BYTES;
    gint64 duration, size;

    list = gst_tag_list_new ();

    gst_tag_list_add (list, GST_TAG_MERGE_REPLACE,
                      GST_TAG_AUDIO_CODEC, "Wavpack", NULL);

    /* try to estimate the average bitrate */
    if (gst_pad_query_peer_duration (dec->sinkpad, &format_bytes, &size) &&
            gst_pad_query_peer_duration (dec->sinkpad, &format_time, &duration) &&
            size > 0 && duration > 0) {
        guint64 bitrate;

        bitrate = gst_util_uint64_scale (size, 8 * GST_SECOND, duration);
        gst_tag_list_add (list, GST_TAG_MERGE_REPLACE, GST_TAG_BITRATE,
                          (guint) bitrate, NULL);
    }

    gst_element_post_message (GST_ELEMENT (dec),
                              gst_message_new_tag (GST_OBJECT (dec), list));
}
gint64
gst_avsynth_query_duration (GstPad *pad, AVS_VideoInfo *vi)
{
  gint64 duration = -1, time_duration = -1;
  gboolean ret;
  GstFormat qfmt = GST_FORMAT_DEFAULT;
  if (pad)
  {
    ret = gst_pad_query_peer_duration (pad, &qfmt, &duration);
    if (!ret)
    {
      GST_INFO ("Failed to get duration in default format");
      qfmt = GST_FORMAT_TIME;
      ret = gst_pad_query_peer_duration (pad, &qfmt, &time_duration);
      if (!ret)
      {
        GST_INFO ("Failed to get duration in time format");
        duration = -1;
      }
      else
      {
        GstPad *peer = gst_pad_get_peer (pad);
        if (peer)
        {
          qfmt = GST_FORMAT_DEFAULT;
          if (!gst_pad_query_convert (peer, GST_FORMAT_TIME, time_duration, &qfmt, &duration))
          {
            GST_INFO ("Failed to convert duration from time format to default format");
            gst_object_unref (peer);
            peer = NULL;
          }
          else
            gst_object_unref (peer);
          if (peer == NULL)
          {
            duration = gst_util_uint64_scale (time_duration, vi->fps_numerator,
                vi->fps_denominator * GST_SECOND);
            /* Attempt to round to nearest integer: if the difference is more
             * than 0.5 (less than -0.5), it means that gst_util_uint64_scale()
             * just truncated an integer, while it had to be rounded
             */
    
            duration = duration * GST_SECOND - 
                time_duration * vi->fps_numerator / vi->fps_denominator <= 
                -0.5 ? duration + 1: duration;
          }
        }
      }
    }
  
    if (duration <= -1)
    {
      GST_WARNING ("Reporting duration as -1, may break some filters");
    }
  }
  return duration;
}
Example #3
0
static gboolean
gst_raw_parse_sink_activatepull (GstPad * sinkpad, gboolean active)
{
  GstRawParse *rp = GST_RAW_PARSE (gst_pad_get_parent (sinkpad));
  gboolean result;

  if (active) {
    GstFormat format;
    gint64 duration;

    /* get the duration in bytes */
    format = GST_FORMAT_BYTES;
    result = gst_pad_query_peer_duration (sinkpad, &format, &duration);
    if (result) {
      GST_DEBUG_OBJECT (rp, "got duration %" GST_TIME_FORMAT,
          GST_TIME_ARGS (duration));
      rp->upstream_length = duration;
      /* convert to time */
      gst_raw_parse_convert (rp, format, duration, GST_FORMAT_TIME, &duration);
    } else {
      rp->upstream_length = -1;
      duration = -1;
    }
    gst_segment_set_duration (&rp->segment, GST_FORMAT_TIME, duration);

    result = gst_raw_parse_handle_seek_pull (rp, NULL);
  } else {
    result = gst_pad_stop_task (sinkpad);
  }

  gst_object_unref (rp);

  return result;
}
Example #4
0
static gboolean
speex_dec_src_query (GstPad * pad, GstQuery * query)
{
  GstSpeexDec *dec;
  gboolean res = FALSE;

  dec = GST_SPEEX_DEC (gst_pad_get_parent (pad));

  switch (GST_QUERY_TYPE (query)) {
    case GST_QUERY_POSITION:{
      GstSegment segment;
      GstFormat format;
      gint64 cur;

      gst_query_parse_position (query, &format, NULL);

      GST_PAD_STREAM_LOCK (dec->sinkpad);
      segment = dec->segment;
      GST_PAD_STREAM_UNLOCK (dec->sinkpad);

      if (segment.format != GST_FORMAT_TIME) {
        GST_DEBUG_OBJECT (dec, "segment not initialised yet");
        break;
      }

      if ((res = speex_dec_convert (dec->srcpad, GST_FORMAT_TIME,
                  segment.last_stop, &format, &cur))) {
        gst_query_set_position (query, format, cur);
      }
      break;
    }
    case GST_QUERY_DURATION:{
      GstFormat format = GST_FORMAT_TIME;
      gint64 dur;

      /* get duration from demuxer */
      if (!gst_pad_query_peer_duration (dec->sinkpad, &format, &dur))
        break;

      gst_query_parse_duration (query, &format, NULL);

      /* and convert it into the requested format */
      if ((res = speex_dec_convert (dec->srcpad, GST_FORMAT_TIME,
                  dur, &format, &dur))) {
        gst_query_set_duration (query, format, dur);
      }
      break;
    }
    default:
      res = gst_pad_query_default (pad, query);
      break;
  }

  gst_object_unref (dec);
  return res;
}
Example #5
0
static gint64
gst_wavpack_parse_get_upstream_length (GstWavpackParse * parse)
{
  gint64 length = -1;
  GstFormat format = GST_FORMAT_BYTES;

  if (!gst_pad_query_peer_duration (parse->sinkpad, &format, &length)) {
    length = -1;
  } else {
    GST_DEBUG ("upstream length: %" G_GINT64_FORMAT, length);
  }
  return length;
}
Example #6
0
gint64
gst_ebml_read_get_length (GstEbmlRead * ebml)
{
  GstFormat fmt = GST_FORMAT_BYTES;

  gint64 end;

  /* FIXME: what to do if we don't get the upstream length */
  if (!gst_pad_query_peer_duration (ebml->sinkpad, &fmt, &end) ||
      fmt != GST_FORMAT_BYTES || end < 0)
    g_return_val_if_reached (0);

  return end;
}
Example #7
0
static GstFlowReturn
gst_trm_chain (GstPad * pad, GstBuffer * buf)
{
  GstTRM *trm = GST_TRM (GST_PAD_PARENT (pad));

  if (!trm->data_available) {
    GstFormat tformat = GST_FORMAT_TIME;
    gint64 total_duration;

    /* FIXME: maybe we should only query this once we have as much data as
     * we need (30secs or so), to get a better estimation of the length in
     * the case of VBR files? */
    if (gst_pad_query_peer_duration (pad, &tformat, &total_duration)) {
      total_duration /= GST_SECOND;
      trm_SetSongLength (trm->trm, total_duration);
      trm->data_available = TRUE;
    }
  }

  if (!trm->signature_available
      && trm_GenerateSignature (trm->trm, (char *) GST_BUFFER_DATA (buf),
          GST_BUFFER_SIZE (buf))) {
    GST_DEBUG ("Signature");

    GST_OBJECT_LOCK (trm);
    if (trm->proxy_address != NULL) {
      if (!trm_SetProxy (trm->trm, trm->proxy_address, trm->proxy_port)) {
        GST_OBJECT_UNLOCK (trm);
        goto proxy_setup_error;
      }
    }
    GST_OBJECT_UNLOCK (trm);

    gst_trm_emit_signature (trm);
  }

  return gst_pad_push (trm->srcpad, buf);

/* ERRORS */
proxy_setup_error:
  {
    GST_ELEMENT_ERROR (trm, RESOURCE, SETTINGS, (NULL),
        ("Unable to set proxy server for trm lookup"));
    return GST_FLOW_ERROR;
  }
}
Example #8
0
static GstFlowReturn
gst_aiff_parse_stream_headers (GstAiffParse * aiff)
{
  GstFlowReturn res;
  GstBuffer *buf;
  guint32 tag, size;
  gboolean gotdata = FALSE;
  gboolean done = FALSE;
  GstEvent **event_p;
  GstFormat bformat;
  gint64 upstream_size = 0;

  bformat = GST_FORMAT_BYTES;
  gst_pad_query_peer_duration (aiff->sinkpad, &bformat, &upstream_size);
  GST_DEBUG_OBJECT (aiff, "upstream size %" G_GUINT64_FORMAT, upstream_size);

  /* loop headers until we get data */
  while (!done) {
    if (aiff->streaming) {
      if (!gst_aiff_parse_peek_chunk_info (aiff, &tag, &size))
        return GST_FLOW_OK;
    } else {
      if ((res =
              gst_pad_pull_range (aiff->sinkpad, aiff->offset, 8,
                  &buf)) != GST_FLOW_OK)
        goto header_read_error;
      tag = GST_READ_UINT32_LE (GST_BUFFER_DATA (buf));
      size = GST_READ_UINT32_BE (GST_BUFFER_DATA (buf) + 4);
    }

    GST_INFO_OBJECT (aiff,
        "Got TAG: %" GST_FOURCC_FORMAT ", offset %" G_GUINT64_FORMAT,
        GST_FOURCC_ARGS (tag), aiff->offset);

    /* We just keep reading chunks until we find the one we're interested in.
     */
    switch (tag) {
      case GST_MAKE_FOURCC ('C', 'O', 'M', 'M'):{
        if (aiff->streaming) {
          if (!gst_aiff_parse_peek_chunk (aiff, &tag, &size))
            return GST_FLOW_OK;

          gst_adapter_flush (aiff->adapter, 8);
          aiff->offset += 8;

          buf = gst_adapter_take_buffer (aiff->adapter, size);
        } else {
          if ((res = gst_aiff_parse_read_chunk (aiff,
                      &aiff->offset, &tag, &buf)) != GST_FLOW_OK)
            return res;
        }

        if (!gst_aiff_parse_parse_comm (aiff, buf)) {
          gst_buffer_unref (buf);
          goto parse_header_error;
        }

        gst_buffer_unref (buf);

        /* do sanity checks of header fields */
        if (aiff->channels == 0)
          goto no_channels;
        if (aiff->rate == 0)
          goto no_rate;

        GST_DEBUG_OBJECT (aiff, "creating the caps");

        aiff->caps = gst_aiff_parse_create_caps (aiff);
        if (!aiff->caps)
          goto unknown_format;

        gst_pad_set_caps (aiff->srcpad, aiff->caps);

        aiff->bytes_per_sample = aiff->channels * aiff->width / 8;
        aiff->bps = aiff->bytes_per_sample * aiff->rate;

        if (aiff->bytes_per_sample <= 0)
          goto no_bytes_per_sample;

        aiff->got_comm = TRUE;
        break;
      }
      case GST_MAKE_FOURCC ('S', 'S', 'N', 'D'):{
        GstFormat fmt;
        GstBuffer *ssndbuf = NULL;
        const guint8 *ssnddata = NULL;
        guint32 datasize;

        GST_DEBUG_OBJECT (aiff, "Got 'SSND' TAG, size : %d", size);

        /* Now, read the 8-byte header in the SSND chunk */
        if (aiff->streaming) {
          if (!gst_aiff_parse_peek_data (aiff, 16, &ssnddata))
            return GST_FLOW_OK;
        } else {
          gst_buffer_unref (buf);
          if ((res =
                  gst_pad_pull_range (aiff->sinkpad, aiff->offset, 16,
                      &ssndbuf)) != GST_FLOW_OK)
            goto header_read_error;
          ssnddata = GST_BUFFER_DATA (ssndbuf);
        }

        aiff->ssnd_offset = GST_READ_UINT32_BE (ssnddata + 8);
        aiff->ssnd_blocksize = GST_READ_UINT32_BE (ssnddata + 12);

        gotdata = TRUE;
        if (aiff->streaming) {
          gst_adapter_flush (aiff->adapter, 16);
        } else {
          gst_buffer_unref (ssndbuf);
        }
        /* 8 byte chunk header, 16 byte SSND header */
        aiff->offset += 24;

        datasize = size - 16;

        aiff->datastart = aiff->offset + aiff->ssnd_offset;
        /* file might be truncated */
        fmt = GST_FORMAT_BYTES;
        if (upstream_size) {
          size = MIN (datasize, (upstream_size - aiff->datastart));
        }
        aiff->datasize = (guint64) datasize;
        aiff->dataleft = (guint64) datasize;
        aiff->end_offset = datasize + aiff->datastart;
        if (!aiff->streaming) {
          /* We will continue looking at chunks until the end - to read tags,
           * etc. */
          aiff->offset += datasize;
        }
        GST_DEBUG_OBJECT (aiff, "datasize = %d", datasize);
        if (aiff->streaming) {
          done = TRUE;
        }
        break;
      }
      default:
        gst_aiff_parse_ignore_chunk (aiff, buf, tag, size);
    }

    if (upstream_size && (aiff->offset >= upstream_size)) {
      /* Now we have gone through the whole file */
      done = TRUE;
    }
  }

  /* We read all the chunks (in pull mode) or reached the SSND chunk
   * (in push mode). We must have both COMM and SSND now; error out 
   * otherwise.
   */
  if (!aiff->got_comm) {
    GST_WARNING_OBJECT (aiff, "Failed to find COMM chunk");
    goto no_header;
  }
  if (!gotdata) {
    GST_WARNING_OBJECT (aiff, "Failed to find SSND chunk");
    goto no_data;
  }

  GST_DEBUG_OBJECT (aiff, "Finished parsing headers");

  if (gst_aiff_parse_calculate_duration (aiff)) {
    gst_segment_init (&aiff->segment, GST_FORMAT_TIME);
    gst_segment_set_duration (&aiff->segment, GST_FORMAT_TIME, aiff->duration);
  } else {
    /* no bitrate, let downstream peer do the math, we'll feed it bytes. */
    gst_segment_init (&aiff->segment, GST_FORMAT_BYTES);
    gst_segment_set_duration (&aiff->segment, GST_FORMAT_BYTES, aiff->datasize);
  }

  /* now we have all the info to perform a pending seek if any, if no
   * event, this will still do the right thing and it will also send
   * the right newsegment event downstream. */
  gst_aiff_parse_perform_seek (aiff, aiff->seek_event);
  /* remove pending event */
  event_p = &aiff->seek_event;
  gst_event_replace (event_p, NULL);

  /* we just started, we are discont */
  aiff->discont = TRUE;

  aiff->state = AIFF_PARSE_DATA;

  return GST_FLOW_OK;

  /* ERROR */
no_header:
  {
    GST_ELEMENT_ERROR (aiff, STREAM, TYPE_NOT_FOUND, (NULL),
        ("Invalid AIFF header (no COMM found)"));
    return GST_FLOW_ERROR;
  }
no_data:
  {
    GST_ELEMENT_ERROR (aiff, STREAM, TYPE_NOT_FOUND, (NULL),
        ("Invalid AIFF: no SSND found"));
    return GST_FLOW_ERROR;
  }
parse_header_error:
  {
    GST_ELEMENT_ERROR (aiff, STREAM, DEMUX, (NULL),
        ("Couldn't parse audio header"));
    return GST_FLOW_ERROR;
  }
no_channels:
  {
    GST_ELEMENT_ERROR (aiff, STREAM, FAILED, (NULL),
        ("Stream claims to contain no channels - invalid data"));
    return GST_FLOW_ERROR;
  }
no_rate:
  {
    GST_ELEMENT_ERROR (aiff, STREAM, FAILED, (NULL),
        ("Stream with sample_rate == 0 - invalid data"));
    return GST_FLOW_ERROR;
  }
no_bytes_per_sample:
  {
    GST_ELEMENT_ERROR (aiff, STREAM, FAILED, (NULL),
        ("Could not caluclate bytes per sample - invalid data"));
    return GST_FLOW_ERROR;
  }
unknown_format:
  {
    GST_ELEMENT_ERROR (aiff, STREAM, TYPE_NOT_FOUND, (NULL),
        ("No caps found for format 0x%x, %d channels, %d Hz",
            aiff->format, aiff->channels, aiff->rate));
    return GST_FLOW_ERROR;
  }
header_read_error:
  {
    GST_ELEMENT_ERROR (aiff, STREAM, DEMUX, (NULL),
        ("Couldn't read in header"));
    return GST_FLOW_ERROR;
  }
}
Example #9
0
/* This function is used to perform seeks on the element in
 * pull mode.
 *
 * It also works when event is NULL, in which case it will just
 * start from the last configured segment. This technique is
 * used when activating the element and to perform the seek in
 * READY.
 */
static gboolean
gst_aiff_parse_perform_seek (GstAiffParse * aiff, GstEvent * event)
{
  gboolean res;
  gdouble rate;
  GstFormat format, bformat;
  GstSeekFlags flags;
  GstSeekType cur_type = GST_SEEK_TYPE_NONE, stop_type;
  gint64 cur, stop, upstream_size;
  gboolean flush;
  gboolean update;
  GstSegment seeksegment = { 0, };
  gint64 last_stop;

  if (event) {
    GST_DEBUG_OBJECT (aiff, "doing seek with event");

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

    /* no negative rates yet */
    if (rate < 0.0)
      goto negative_rate;

    if (format != aiff->segment.format) {
      GST_INFO_OBJECT (aiff, "converting seek-event from %s to %s",
          gst_format_get_name (format),
          gst_format_get_name (aiff->segment.format));
      res = TRUE;
      if (cur_type != GST_SEEK_TYPE_NONE)
        res =
            gst_pad_query_convert (aiff->srcpad, format, cur,
            &aiff->segment.format, &cur);
      if (res && stop_type != GST_SEEK_TYPE_NONE)
        res =
            gst_pad_query_convert (aiff->srcpad, format, stop,
            &aiff->segment.format, &stop);
      if (!res)
        goto no_format;

      format = aiff->segment.format;
    }
  } else {
    GST_DEBUG_OBJECT (aiff, "doing seek without event");
    flags = 0;
    rate = 1.0;
    cur_type = GST_SEEK_TYPE_SET;
    stop_type = GST_SEEK_TYPE_SET;
  }

  /* get flush flag */
  flush = flags & GST_SEEK_FLAG_FLUSH;

  /* now we need to make sure the streaming thread is stopped. We do this by
   * either sending a FLUSH_START event downstream which will cause the
   * streaming thread to stop with a WRONG_STATE.
   * For a non-flushing seek we simply pause the task, which will happen as soon
   * as it completes one iteration (and thus might block when the sink is
   * blocking in preroll). */
  if (flush) {
    GST_DEBUG_OBJECT (aiff, "sending flush start");
    gst_pad_push_event (aiff->srcpad, gst_event_new_flush_start ());
  } else {
    gst_pad_pause_task (aiff->sinkpad);
  }

  /* we should now be able to grab the streaming thread because we stopped it
   * with the above flush/pause code */
  GST_PAD_STREAM_LOCK (aiff->sinkpad);

  /* save current position */
  last_stop = aiff->segment.last_stop;

  GST_DEBUG_OBJECT (aiff, "stopped streaming at %" G_GINT64_FORMAT, last_stop);

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

  /* configure the seek parameters in the seeksegment. We will then have the
   * right values in the segment to perform the seek */
  if (event) {
    GST_DEBUG_OBJECT (aiff, "configuring seek");
    gst_segment_set_seek (&seeksegment, rate, format, flags,
        cur_type, cur, stop_type, stop, &update);
  }

  /* figure out the last position we need to play. If it's configured (stop !=
   * -1), use that, else we play until the total duration of the file */
  if ((stop = seeksegment.stop) == -1)
    stop = seeksegment.duration;

  GST_DEBUG_OBJECT (aiff, "cur_type =%d", cur_type);
  if ((cur_type != GST_SEEK_TYPE_NONE)) {
    /* bring offset to bytes, if the bps is 0, we have the segment in BYTES and
     * we can just copy the last_stop. If not, we use the bps to convert TIME to
     * bytes. */
    if (aiff->bps > 0)
      aiff->offset =
          uint64_ceiling_scale (seeksegment.last_stop, (guint64) aiff->bps,
          GST_SECOND);
    else
      aiff->offset = seeksegment.last_stop;
    GST_LOG_OBJECT (aiff, "offset=%" G_GUINT64_FORMAT, aiff->offset);
    aiff->offset -= (aiff->offset % aiff->bytes_per_sample);
    GST_LOG_OBJECT (aiff, "offset=%" G_GUINT64_FORMAT, aiff->offset);
    aiff->offset += aiff->datastart;
    GST_LOG_OBJECT (aiff, "offset=%" G_GUINT64_FORMAT, aiff->offset);
  } else {
    GST_LOG_OBJECT (aiff, "continue from offset=%" G_GUINT64_FORMAT,
        aiff->offset);
  }

  if (stop_type != GST_SEEK_TYPE_NONE) {
    if (aiff->bps > 0)
      aiff->end_offset =
          uint64_ceiling_scale (stop, (guint64) aiff->bps, GST_SECOND);
    else
      aiff->end_offset = stop;
    GST_LOG_OBJECT (aiff, "end_offset=%" G_GUINT64_FORMAT, aiff->end_offset);
    aiff->end_offset -= (aiff->end_offset % aiff->bytes_per_sample);
    GST_LOG_OBJECT (aiff, "end_offset=%" G_GUINT64_FORMAT, aiff->end_offset);
    aiff->end_offset += aiff->datastart;
    GST_LOG_OBJECT (aiff, "end_offset=%" G_GUINT64_FORMAT, aiff->end_offset);
  } else {
    GST_LOG_OBJECT (aiff, "continue to end_offset=%" G_GUINT64_FORMAT,
        aiff->end_offset);
  }

  /* make sure filesize is not exceeded due to rounding errors or so,
   * same precaution as in _stream_headers */
  bformat = GST_FORMAT_BYTES;
  if (gst_pad_query_peer_duration (aiff->sinkpad, &bformat, &upstream_size))
    aiff->end_offset = MIN (aiff->end_offset, upstream_size);

  /* this is the range of bytes we will use for playback */
  aiff->offset = MIN (aiff->offset, aiff->end_offset);
  aiff->dataleft = aiff->end_offset - aiff->offset;

  GST_DEBUG_OBJECT (aiff,
      "seek: rate %lf, offset %" G_GUINT64_FORMAT ", end %" G_GUINT64_FORMAT
      ", segment %" GST_TIME_FORMAT " -- %" GST_TIME_FORMAT, rate, aiff->offset,
      aiff->end_offset, GST_TIME_ARGS (seeksegment.start),
      GST_TIME_ARGS (stop));

  /* prepare for streaming again */
  if (flush) {
    /* if we sent a FLUSH_START, we now send a FLUSH_STOP */
    GST_DEBUG_OBJECT (aiff, "sending flush stop");
    gst_pad_push_event (aiff->srcpad, gst_event_new_flush_stop ());
  } else if (aiff->segment_running) {
    /* we are running the current segment and doing a non-flushing seek,
     * close the segment first based on the previous last_stop. */
    GST_DEBUG_OBJECT (aiff, "closing running segment %" G_GINT64_FORMAT
        " to %" G_GINT64_FORMAT, aiff->segment.accum, aiff->segment.last_stop);

    /* queue the segment for sending in the stream thread */
    if (aiff->close_segment)
      gst_event_unref (aiff->close_segment);
    aiff->close_segment = gst_event_new_new_segment (TRUE,
        aiff->segment.rate, aiff->segment.format,
        aiff->segment.accum, aiff->segment.last_stop, aiff->segment.accum);

    /* keep track of our last_stop */
    seeksegment.accum = aiff->segment.last_stop;
  }

  /* now we did the seek and can activate the new segment values */
  memcpy (&aiff->segment, &seeksegment, sizeof (GstSegment));

  /* if we're doing a segment seek, post a SEGMENT_START message */
  if (aiff->segment.flags & GST_SEEK_FLAG_SEGMENT) {
    gst_element_post_message (GST_ELEMENT_CAST (aiff),
        gst_message_new_segment_start (GST_OBJECT_CAST (aiff),
            aiff->segment.format, aiff->segment.last_stop));
  }

  /* now create the newsegment */
  GST_DEBUG_OBJECT (aiff, "Creating newsegment from %" G_GINT64_FORMAT
      " to %" G_GINT64_FORMAT, aiff->segment.last_stop, stop);

  /* store the newsegment event so it can be sent from the streaming thread. */
  if (aiff->start_segment)
    gst_event_unref (aiff->start_segment);
  aiff->start_segment =
      gst_event_new_new_segment (FALSE, aiff->segment.rate,
      aiff->segment.format, aiff->segment.last_stop, stop,
      aiff->segment.last_stop);

  /* mark discont if we are going to stream from another position. */
  if (last_stop != aiff->segment.last_stop) {
    GST_DEBUG_OBJECT (aiff, "mark DISCONT, we did a seek to another position");
    aiff->discont = TRUE;
  }

  /* and start the streaming task again */
  aiff->segment_running = TRUE;
  if (!aiff->streaming) {
    gst_pad_start_task (aiff->sinkpad, (GstTaskFunction) gst_aiff_parse_loop,
        aiff->sinkpad);
  }

  GST_PAD_STREAM_UNLOCK (aiff->sinkpad);

  return TRUE;

  /* ERRORS */
negative_rate:
  {
    GST_DEBUG_OBJECT (aiff, "negative playback rates are not supported yet.");
    return FALSE;
  }
no_format:
  {
    GST_DEBUG_OBJECT (aiff, "unsupported format given, seek aborted.");
    return FALSE;
  }
}
Example #10
0
/* FIXME, the duration query should reflect how long you will produce
 * data, that is the amount of stream time until you will emit EOS.
 *
 * For synchronized mixing this is always the max of all the durations
 * of upstream since we emit EOS when all of them finished.
 *
 * We don't do synchronized mixing so this really depends on where the
 * streams where punched in and what their relative offsets are against
 * eachother which we can get from the first timestamps we see.
 *
 * When we add a new stream (or remove a stream) the duration might
 * also become invalid again and we need to post a new DURATION
 * message to notify this fact to the parent.
 * For now we take the max of all the upstream elements so the simple
 * cases work at least somewhat.
 */
static gboolean
gst_adder_query_duration (GstAdder * adder, GstQuery * query)
{
  gint64 max;
  gboolean res;
  GstFormat format;
  GstIterator *it;
  gboolean done;

  /* parse format */
  gst_query_parse_duration (query, &format, NULL);

  max = -1;
  res = TRUE;
  done = FALSE;

  it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (adder));
  while (!done) {
    GstIteratorResult ires;

    gpointer item;

    ires = gst_iterator_next (it, &item);
    switch (ires) {
      case GST_ITERATOR_DONE:
        done = TRUE;
        break;
      case GST_ITERATOR_OK:
      {
        GstPad *pad = GST_PAD_CAST (item);

        gint64 duration;

        /* ask sink peer for duration */
        res &= gst_pad_query_peer_duration (pad, &format, &duration);
        /* take max from all valid return values */
        if (res) {
          /* valid unknown length, stop searching */
          if (duration == -1) {
            max = duration;
            done = TRUE;
          }
          /* else see if bigger than current max */
          else if (duration > max)
            max = duration;
        }
        gst_object_unref (pad);
        break;
      }
      case GST_ITERATOR_RESYNC:
        max = -1;
        res = TRUE;
        gst_iterator_resync (it);
        break;
      default:
        res = FALSE;
        done = TRUE;
        break;
    }
  }
  gst_iterator_free (it);

  if (res) {
    /* and store the max */
    GST_DEBUG_OBJECT (adder, "Total duration in format %s: %"
        GST_TIME_FORMAT, gst_format_get_name (format), GST_TIME_ARGS (max));
    gst_query_set_duration (query, format, max);
  }

  return res;
}
Example #11
0
static gboolean
gst_live_adder_query_pos_dur (GstLiveAdder * adder, GstFormat informat,
                              gboolean position, gint64 * outvalue)
{
    gint64 max = G_MININT64;
    gboolean res = TRUE;
    GstIterator *it;
    gboolean done = FALSE;


    it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (adder));
    while (!done) {
        GstIteratorResult ires;
        gpointer item;
        GstFormat format = informat;

        ires = gst_iterator_next (it, &item);
        switch (ires) {
        case GST_ITERATOR_DONE:
            done = TRUE;
            break;
        case GST_ITERATOR_OK:
        {
            GstPad *pad = GST_PAD_CAST (item);
            gint64 value;
            gboolean curres;

            /* ask sink peer for duration */
            if (position)
                curres = gst_pad_query_peer_position (pad, &format, &value);
            else
                curres = gst_pad_query_peer_duration (pad, &format, &value);

            /* take max from all valid return values */
            /* Only if the format is the one we requested, otherwise ignore it ?
             */

            if (curres && format == informat) {
                res &= curres;

                /* valid unknown length, stop searching */
                if (value == -1) {
                    max = value;
                    done = TRUE;
                } else if (value > max) {
                    max = value;
                }
            }
            break;
        }
        case GST_ITERATOR_RESYNC:
            max = -1;
            res = TRUE;
            break;
        default:
            res = FALSE;
            done = TRUE;
            break;
        }
    }
    gst_iterator_free (it);

    if (res)
        *outvalue = max;

    return res;
}
Example #12
0
static gboolean
gst_speex_enc_src_query (GstPad * pad, GstQuery * query)
{
  gboolean res = TRUE;
  GstSpeexEnc *enc;

  enc = GST_SPEEX_ENC (gst_pad_get_parent (pad));

  switch (GST_QUERY_TYPE (query)) {
    case GST_QUERY_POSITION:
    {
      GstFormat fmt, req_fmt;
      gint64 pos, val;

      gst_query_parse_position (query, &req_fmt, NULL);
      if ((res = gst_pad_query_peer_position (enc->sinkpad, &req_fmt, &val))) {
        gst_query_set_position (query, req_fmt, val);
        break;
      }

      fmt = GST_FORMAT_TIME;
      if (!(res = gst_pad_query_peer_position (enc->sinkpad, &fmt, &pos)))
        break;

      if ((res =
              gst_pad_query_peer_convert (enc->sinkpad, fmt, pos, &req_fmt,
                  &val)))
        gst_query_set_position (query, req_fmt, val);

      break;
    }
    case GST_QUERY_DURATION:
    {
      GstFormat fmt, req_fmt;
      gint64 dur, val;

      gst_query_parse_duration (query, &req_fmt, NULL);
      if ((res = gst_pad_query_peer_duration (enc->sinkpad, &req_fmt, &val))) {
        gst_query_set_duration (query, req_fmt, val);
        break;
      }

      fmt = GST_FORMAT_TIME;
      if (!(res = gst_pad_query_peer_duration (enc->sinkpad, &fmt, &dur)))
        break;

      if ((res =
              gst_pad_query_peer_convert (enc->sinkpad, fmt, dur, &req_fmt,
                  &val))) {
        gst_query_set_duration (query, req_fmt, val);
      }
      break;
    }
    case GST_QUERY_CONVERT:
    {
      GstFormat src_fmt, dest_fmt;
      gint64 src_val, dest_val;

      gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
      if (!(res = gst_speex_enc_convert_src (pad, src_fmt, src_val, &dest_fmt,
                  &dest_val)))
        goto error;
      gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
      break;
    }
    case GST_QUERY_LATENCY:
    {
      gboolean live;
      GstClockTime min_latency, max_latency;
      gint64 latency;

      if ((res = gst_pad_peer_query (enc->sinkpad, query))) {
        gst_query_parse_latency (query, &live, &min_latency, &max_latency);
        GST_LOG_OBJECT (pad, "Upstream latency: %" GST_PTR_FORMAT, query);

        latency = gst_speex_enc_get_latency (enc);

        /* add our latency */
        min_latency += latency;
        if (max_latency != -1)
          max_latency += latency;

        gst_query_set_latency (query, live, min_latency, max_latency);
        GST_LOG_OBJECT (pad, "Adjusted latency: %" GST_PTR_FORMAT, query);
      }
      break;
    }
    default:
      res = gst_pad_peer_query (enc->sinkpad, query);
      break;
  }

error:

  gst_object_unref (enc);

  return res;
}
Example #13
0
static gboolean
gst_au_parse_src_query (GstPad * pad, GstQuery * query)
{
  GstAuParse *auparse;
  gboolean ret = FALSE;

  auparse = GST_AU_PARSE (gst_pad_get_parent (pad));

  switch (GST_QUERY_TYPE (query)) {
    case GST_QUERY_DURATION:{
      GstFormat bformat = GST_FORMAT_BYTES;
      GstFormat format;
      gint64 len, val;

      gst_query_parse_duration (query, &format, NULL);
      if (!gst_pad_query_peer_duration (auparse->sinkpad, &bformat, &len)) {
        GST_DEBUG_OBJECT (auparse, "failed to query upstream length");
        break;
      }
      GST_OBJECT_LOCK (auparse);
      len -= auparse->offset;
      GST_OBJECT_UNLOCK (auparse);

      ret = gst_au_parse_src_convert (auparse, bformat, len, format, &val);

      if (ret) {
        gst_query_set_duration (query, format, val);
      }
      break;
    }
    case GST_QUERY_POSITION:{
      GstFormat bformat = GST_FORMAT_BYTES;
      GstFormat format;
      gint64 pos, val;

      gst_query_parse_position (query, &format, NULL);
      if (!gst_pad_query_peer_position (auparse->sinkpad, &bformat, &pos)) {
        GST_DEBUG_OBJECT (auparse, "failed to query upstream position");
        break;
      }
      GST_OBJECT_LOCK (auparse);
      pos -= auparse->offset;
      GST_OBJECT_UNLOCK (auparse);

      ret = gst_au_parse_src_convert (auparse, GST_FORMAT_BYTES, pos,
          format, &val);

      if (ret) {
        gst_query_set_position (query, format, val);
      }
      break;
    }
    case GST_QUERY_SEEKING:{
      GstFormat format;

      gst_query_parse_seeking (query, &format, NULL, NULL, NULL);
      /* FIXME: query duration in 'format'
         gst_query_set_seeking (query, format, TRUE, 0, duration);
       */
      gst_query_set_seeking (query, format, TRUE, 0, GST_CLOCK_TIME_NONE);
      ret = TRUE;
      break;
    }
    default:
      ret = gst_pad_query_default (pad, query);
      break;
  }

  gst_object_unref (auparse);
  return ret;
}
Example #14
0
static GstFlowReturn
gst_real_audio_demux_parse_header (GstRealAudioDemux * demux)
{
  const guint8 *data;
  gchar *codec_name = NULL;
  GstCaps *caps = NULL;
  guint avail;

  g_assert (demux->ra_version == 4 || demux->ra_version == 3);

  avail = gst_adapter_available (demux->adapter);
  if (avail < 16)
    return GST_FLOW_OK;

  if (!gst_real_audio_demux_get_data_offset_from_header (demux))
    return GST_FLOW_ERROR;      /* shouldn't happen */

  GST_DEBUG_OBJECT (demux, "data_offset  = %u", demux->data_offset);

  if (avail + 6 < demux->data_offset) {
    GST_DEBUG_OBJECT (demux, "Need %u bytes, but only %u available now",
        demux->data_offset - 6, avail);
    return GST_FLOW_OK;
  }

  data = gst_adapter_peek (demux->adapter, demux->data_offset - 6);
  g_assert (data);

  switch (demux->ra_version) {
    case 3:
      demux->fourcc = GST_RM_AUD_14_4;
      demux->packet_size = 20;
      demux->sample_rate = 8000;
      demux->channels = 1;
      demux->sample_width = 16;
      demux->flavour = 1;
      demux->leaf_size = 0;
      demux->height = 0;
      break;
    case 4:
      demux->flavour = GST_READ_UINT16_BE (data + 16);
      /* demux->frame_size = GST_READ_UINT32_BE (data + 36); */
      demux->leaf_size = GST_READ_UINT16_BE (data + 38);
      demux->height = GST_READ_UINT16_BE (data + 34);
      demux->packet_size = GST_READ_UINT32_BE (data + 18);
      demux->sample_rate = GST_READ_UINT16_BE (data + 42);
      demux->sample_width = GST_READ_UINT16_BE (data + 46);
      demux->channels = GST_READ_UINT16_BE (data + 48);
      demux->fourcc = GST_READ_UINT32_LE (data + 56);
      demux->pending_tags = gst_rm_utils_read_tags (data + 63,
          demux->data_offset - 63, gst_rm_utils_read_string8);
      break;
    default:
      g_assert_not_reached ();
#if 0
    case 5:
      demux->flavour = GST_READ_UINT16_BE (data + 16);
      /* demux->frame_size = GST_READ_UINT32_BE (data + 36); */
      demux->leaf_size = GST_READ_UINT16_BE (data + 38);
      demux->height = GST_READ_UINT16_BE (data + 34);

      demux->sample_rate = GST_READ_UINT16_BE (data + 48);
      demux->sample_width = GST_READ_UINT16_BE (data + 52);
      demux->n_channels = GST_READ_UINT16_BE (data + 54);
      demux->fourcc = RMDEMUX_FOURCC_GET (data + 60);
      break;
#endif
  }

  GST_INFO_OBJECT (demux, "packet_size  = %u", demux->packet_size);
  GST_INFO_OBJECT (demux, "sample_rate  = %u", demux->sample_rate);
  GST_INFO_OBJECT (demux, "sample_width = %u", demux->sample_width);
  GST_INFO_OBJECT (demux, "channels     = %u", demux->channels);
  GST_INFO_OBJECT (demux, "fourcc       = '%" GST_FOURCC_FORMAT "' (%08X)",
      GST_FOURCC_ARGS (demux->fourcc), demux->fourcc);

  switch (demux->fourcc) {
    case GST_RM_AUD_14_4:
      caps = gst_caps_new_simple ("audio/x-pn-realaudio", "raversion",
          G_TYPE_INT, 1, NULL);
      demux->byterate_num = 1000;
      demux->byterate_denom = 1;
      break;

    case GST_RM_AUD_28_8:
      /* FIXME: needs descrambling */
      caps = gst_caps_new_simple ("audio/x-pn-realaudio", "raversion",
          G_TYPE_INT, 2, NULL);
      break;

    case GST_RM_AUD_DNET:
      caps = gst_caps_new_simple ("audio/x-ac3", "rate", G_TYPE_INT,
          demux->sample_rate, NULL);
      if (demux->packet_size == 0 || demux->sample_rate == 0)
        goto broken_file;
      demux->byterate_num = demux->packet_size * demux->sample_rate;
      demux->byterate_denom = 1536;
      break;

      /* Sipro/ACELP.NET Voice Codec (MIME unknown) */
    case GST_RM_AUD_SIPR:
      caps = gst_caps_new_simple ("audio/x-sipro", NULL);
      break;

    default:
      GST_WARNING_OBJECT (demux, "unknown fourcc %08X", demux->fourcc);
      break;
  }

  if (caps == NULL)
    goto unknown_fourcc;

  gst_caps_set_simple (caps,
      "flavor", G_TYPE_INT, demux->flavour,
      "rate", G_TYPE_INT, demux->sample_rate,
      "channels", G_TYPE_INT, demux->channels,
      "width", G_TYPE_INT, demux->sample_width,
      "leaf_size", G_TYPE_INT, demux->leaf_size,
      "packet_size", G_TYPE_INT, demux->packet_size,
      "height", G_TYPE_INT, demux->height, NULL);

  GST_INFO_OBJECT (demux, "Adding source pad, caps %" GST_PTR_FORMAT, caps);
  demux->srcpad = gst_pad_new_from_static_template (&src_template, "src");
  gst_pad_use_fixed_caps (demux->srcpad);
  gst_pad_set_caps (demux->srcpad, caps);
  codec_name = gst_pb_utils_get_codec_description (caps);
  gst_caps_unref (caps);
  gst_pad_set_event_function (demux->srcpad,
      GST_DEBUG_FUNCPTR (gst_real_audio_demux_src_event));
  gst_pad_set_query_function (demux->srcpad,
      GST_DEBUG_FUNCPTR (gst_real_audio_demux_src_query));
  gst_pad_set_active (demux->srcpad, TRUE);
  gst_element_add_pad (GST_ELEMENT (demux), demux->srcpad);

  if (demux->byterate_num > 0 && demux->byterate_denom > 0) {
    GstFormat bformat = GST_FORMAT_BYTES;
    gint64 size_bytes = 0;

    GST_INFO_OBJECT (demux, "byte rate = %u/%u = %u bytes/sec",
        demux->byterate_num, demux->byterate_denom,
        demux->byterate_num / demux->byterate_denom);

    if (gst_pad_query_peer_duration (demux->sinkpad, &bformat, &size_bytes)) {
      demux->duration =
          gst_real_demux_get_timestamp_from_offset (demux, size_bytes);
      demux->upstream_size = size_bytes;
      GST_INFO_OBJECT (demux, "upstream_size = %" G_GUINT64_FORMAT,
          demux->upstream_size);
      GST_INFO_OBJECT (demux, "duration      = %" GST_TIME_FORMAT,
          GST_TIME_ARGS (demux->duration));
    }
  }

  demux->need_newsegment = TRUE;

  if (codec_name) {
    if (demux->pending_tags == NULL)
      demux->pending_tags = gst_tag_list_new ();

    gst_tag_list_add (demux->pending_tags, GST_TAG_MERGE_REPLACE,
        GST_TAG_AUDIO_CODEC, codec_name, NULL);
    g_free (codec_name);
  }

  gst_adapter_flush (demux->adapter, demux->data_offset - 6);

  demux->state = REAL_AUDIO_DEMUX_STATE_DATA;
  demux->need_newsegment = TRUE;

  return GST_FLOW_OK;

/* ERRORS */
unknown_fourcc:
  {
    GST_ELEMENT_ERROR (GST_ELEMENT (demux), STREAM, DECODE, (NULL),
        ("Unknown fourcc '%" GST_FOURCC_FORMAT "'",
            GST_FOURCC_ARGS (demux->fourcc)));
    return GST_FLOW_ERROR;
  }
broken_file:
  {
    GST_ELEMENT_ERROR (GST_ELEMENT (demux), STREAM, DECODE, (NULL),
        ("Broken file - invalid sample_rate or other header value"));
    return GST_FLOW_ERROR;
  }

}
Example #15
0
static gboolean
speed_src_query (GstPad * pad, GstQuery * query)
{
  gboolean ret = TRUE;
  GstSpeed *filter;

  filter = GST_SPEED (gst_pad_get_parent (pad));

  switch (GST_QUERY_TYPE (query)) {
    case GST_QUERY_POSITION:
    {
      GstFormat format;
      GstFormat rformat = GST_FORMAT_TIME;
      gint64 cur;
      GstFormat conv_format = GST_FORMAT_TIME;

      /* save requested format */
      gst_query_parse_position (query, &format, NULL);

      /* query peer for current position in time */
      gst_query_set_position (query, GST_FORMAT_TIME, -1);

      if (!gst_pad_query_peer_position (filter->sinkpad, &rformat, &cur)) {
        GST_LOG_OBJECT (filter, "query on peer pad failed");
        goto error;
      }

      if (rformat == GST_FORMAT_BYTES)
        GST_LOG_OBJECT (filter,
            "peer pad returned current=%" G_GINT64_FORMAT " bytes", cur);
      else if (rformat == GST_FORMAT_TIME)
        GST_LOG_OBJECT (filter, "peer pad returned time=%" G_GINT64_FORMAT,
            cur);

      /* convert to time format */
      if (!gst_speed_convert (pad, rformat, cur, &conv_format, &cur)) {
        ret = FALSE;
        break;
      }

      /* adjust for speed factor */
      cur /= filter->speed;

      /* convert to time format */
      if (!gst_speed_convert (pad, conv_format, cur, &format, &cur)) {
        ret = FALSE;
        break;
      }
      gst_query_set_position (query, format, cur);

      GST_LOG_OBJECT (filter,
          "position query: we return %" G_GUINT64_FORMAT " (format %u)", cur,
          format);

      break;
    }
    case GST_QUERY_DURATION:
    {
      GstFormat format;
      GstFormat rformat = GST_FORMAT_TIME;
      gint64 end;
      GstFormat conv_format = GST_FORMAT_TIME;

      /* save requested format */
      gst_query_parse_duration (query, &format, NULL);

      /* query peer for total length in time */
      gst_query_set_duration (query, GST_FORMAT_TIME, -1);

      if (!gst_pad_query_peer_duration (filter->sinkpad, &rformat, &end)) {
        GST_LOG_OBJECT (filter, "query on peer pad failed");
        goto error;
      }

      if (rformat == GST_FORMAT_BYTES)
        GST_LOG_OBJECT (filter,
            "peer pad returned total=%" G_GINT64_FORMAT " bytes", end);
      else if (rformat == GST_FORMAT_TIME)
        GST_LOG_OBJECT (filter, "peer pad returned time=%" G_GINT64_FORMAT,
            end);

      /* convert to time format */
      if (!gst_speed_convert (pad, rformat, end, &conv_format, &end)) {
        ret = FALSE;
        break;
      }

      /* adjust for speed factor */
      end /= filter->speed;

      /* convert to time format */
      if (!gst_speed_convert (pad, conv_format, end, &format, &end)) {
        ret = FALSE;
        break;
      }

      gst_query_set_duration (query, format, end);

      GST_LOG_OBJECT (filter,
          "duration query: we return %" G_GUINT64_FORMAT " (format %u)", end,
          format);

      break;
    }
    default:
      ret = FALSE;
      break;
  }

  gst_object_unref (filter);
  return ret;

error:

  gst_object_unref (filter);
  GST_DEBUG ("error handling query");
  return FALSE;
}
Example #16
0
static gboolean
gst_interleave_src_query_duration (GstInterleave * self, GstQuery * query)
{
  gint64 max;

  gboolean res;

  GstFormat format;

  GstIterator *it;

  gboolean done;

  /* parse format */
  gst_query_parse_duration (query, &format, NULL);

  max = -1;
  res = TRUE;
  done = FALSE;

  /* Take maximum of all durations */
  it = gst_element_iterate_sink_pads (GST_ELEMENT_CAST (self));
  while (!done) {
    GstIteratorResult ires;

    gpointer item;

    ires = gst_iterator_next (it, &item);
    switch (ires) {
      case GST_ITERATOR_DONE:
        done = TRUE;
        break;
      case GST_ITERATOR_OK:
      {
        GstPad *pad = GST_PAD_CAST (item);

        gint64 duration;

        /* ask sink peer for duration */
        res &= gst_pad_query_peer_duration (pad, &format, &duration);
        /* take max from all valid return values */
        if (res) {
          /* valid unknown length, stop searching */
          if (duration == -1) {
            max = duration;
            done = TRUE;
          }
          /* else see if bigger than current max */
          else if (duration > max)
            max = duration;
        }
        gst_object_unref (pad);
        break;
      }
      case GST_ITERATOR_RESYNC:
        max = -1;
        res = TRUE;
        gst_iterator_resync (it);
        break;
      default:
        res = FALSE;
        done = TRUE;
        break;
    }
  }
  gst_iterator_free (it);

  if (res) {
    /* If in bytes format we have to multiply with the number of channels
     * to get the correct results. All other formats should be fine */
    if (format == GST_FORMAT_BYTES && max != -1)
      max *= self->channels;

    /* and store the max */
    GST_DEBUG_OBJECT (self, "Total duration in format %s: %"
        GST_TIME_FORMAT, gst_format_get_name (format), GST_TIME_ARGS (max));
    gst_query_set_duration (query, format, max);
  }

  return res;
}
Example #17
0
static void
gst_raw_parse_loop (GstElement * element)
{
  GstRawParse *rp = GST_RAW_PARSE (element);
  GstRawParseClass *rp_class = GST_RAW_PARSE_GET_CLASS (rp);
  GstFlowReturn ret;
  GstBuffer *buffer;
  gint size;

  if (!gst_raw_parse_set_src_caps (rp))
    goto no_caps;

  if (rp->close_segment) {
    GST_DEBUG_OBJECT (rp, "sending close segment");
    gst_pad_push_event (rp->srcpad, rp->close_segment);
    rp->close_segment = NULL;
  }
  if (rp->start_segment) {
    GST_DEBUG_OBJECT (rp, "sending start segment");
    gst_pad_push_event (rp->srcpad, rp->start_segment);
    rp->start_segment = NULL;
  }

  if (rp_class->multiple_frames_per_buffer && rp->framesize < 4096)
    size = 4096 - (4096 % rp->framesize);
  else
    size = rp->framesize;

  if (rp->segment.rate >= 0) {
    if (rp->offset + size > rp->upstream_length) {
      GstFormat fmt = GST_FORMAT_BYTES;

      if (!gst_pad_query_peer_duration (rp->sinkpad, &fmt,
              &rp->upstream_length)) {
        GST_WARNING_OBJECT (rp,
            "Could not get upstream duration, trying to pull frame by frame");
        size = rp->framesize;
      } else if (rp->upstream_length < rp->offset + rp->framesize) {
        ret = GST_FLOW_UNEXPECTED;
        goto pause;
      } else if (rp->offset + size > rp->upstream_length) {
        size = rp->upstream_length - rp->offset;
        size -= size % rp->framesize;
      }
    }
  } else {
    if (rp->offset == 0) {
      ret = GST_FLOW_UNEXPECTED;
      goto pause;
    } else if (rp->offset < size) {
      size -= rp->offset;
    }
    rp->offset -= size;
  }

  ret = gst_pad_pull_range (rp->sinkpad, rp->offset, size, &buffer);

  if (ret != GST_FLOW_OK) {
    GST_DEBUG_OBJECT (rp, "pull_range (%" G_GINT64_FORMAT ", %u) "
        "failed, flow: %s", rp->offset, size, gst_flow_get_name (ret));
    buffer = NULL;
    goto pause;
  }

  if (GST_BUFFER_SIZE (buffer) < size) {
    GST_DEBUG_OBJECT (rp, "Short read at offset %" G_GINT64_FORMAT
        ", got only %u of %u bytes", rp->offset, GST_BUFFER_SIZE (buffer),
        size);

    if (size > rp->framesize) {
      GST_BUFFER_SIZE (buffer) -= GST_BUFFER_SIZE (buffer) % rp->framesize;
    } else {
      gst_buffer_unref (buffer);
      buffer = NULL;
      ret = GST_FLOW_UNEXPECTED;
      goto pause;
    }
  }

  ret = gst_raw_parse_push_buffer (rp, buffer);
  if (ret != GST_FLOW_OK)
    goto pause;

  return;

  /* ERRORS */
no_caps:
  {
    GST_ERROR_OBJECT (rp, "could not negotiate caps");
    ret = GST_FLOW_NOT_NEGOTIATED;
    goto pause;
  }
pause:
  {
    const gchar *reason = gst_flow_get_name (ret);

    GST_LOG_OBJECT (rp, "pausing task, reason %s", reason);
    gst_pad_pause_task (rp->sinkpad);

    if (ret == GST_FLOW_UNEXPECTED) {
      if (rp->segment.flags & GST_SEEK_FLAG_SEGMENT) {
        GstClockTime stop;

        GST_LOG_OBJECT (rp, "Sending segment done");

        if ((stop = rp->segment.stop) == -1)
          stop = rp->segment.duration;

        gst_element_post_message (GST_ELEMENT_CAST (rp),
            gst_message_new_segment_done (GST_OBJECT_CAST (rp),
                rp->segment.format, stop));
      } else {
        GST_LOG_OBJECT (rp, "Sending EOS, at end of stream");
        gst_pad_push_event (rp->srcpad, gst_event_new_eos ());
      }
    } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_UNEXPECTED) {
      GST_ELEMENT_ERROR (rp, STREAM, FAILED,
          ("Internal data stream error."),
          ("stream stopped, reason %s", reason));
      gst_pad_push_event (rp->srcpad, gst_event_new_eos ());
    }
    return;
  }
}