예제 #1
0
static void
gst_tarkindec_chain (GstPad * pad, GstData * _data)
{
  GstBuffer *buf = GST_BUFFER (_data);
  TarkinDec *tarkindec;

  g_return_if_fail (pad != NULL);
  g_return_if_fail (GST_IS_PAD (pad));
  g_return_if_fail (buf != NULL);

  tarkindec = GST_TARKINDEC (gst_pad_get_parent (pad));

  if (!tarkindec->setup) {
    GST_ELEMENT_ERROR (tarkindec, CORE, NEGOTATION, (NULL),
        ("decoder not initialized (input is not tarkin?)"));
    if (GST_IS_BUFFER (buf))
      gst_buffer_unref (buf);
    else
      gst_pad_event_default (pad, GST_EVENT (buf));
    return;
  }

  if (GST_IS_EVENT (buf)) {
    switch (GST_EVENT_TYPE (buf)) {
      case GST_EVENT_EOS:
      default:
        gst_pad_event_default (pad, GST_EVENT (buf));
        break;
    }
  } else {
    gchar *data;
    gulong size;
    gchar *buffer;
    guchar *rgb;
    TarkinTime date;
    TarkinVideoLayerDesc *layer;

    /* data to decode */
    data = GST_BUFFER_DATA (buf);
    size = GST_BUFFER_SIZE (buf);

    buffer = ogg_sync_buffer (&tarkindec->oy, size);
    memcpy (buffer, data, size);
    ogg_sync_wrote (&tarkindec->oy, size);

    if (ogg_sync_pageout (&tarkindec->oy, &tarkindec->og)) {
      ogg_stream_pagein (&tarkindec->os, &tarkindec->og);

      while (ogg_stream_packetout (&tarkindec->os, &tarkindec->op)) {
        if (tarkindec->op.e_o_s)
          break;
        if (tarkindec->nheader < 3) {   /* 3 first packets to headerin */
          tarkin_synthesis_headerin (&tarkindec->ti, &tarkindec->tc,
              &tarkindec->op);

          if (tarkindec->nheader == 2) {
            tarkin_synthesis_init (tarkindec->tarkin_stream, &tarkindec->ti);
          }
          tarkindec->nheader++;
        } else {
          tarkin_synthesis_packetin (tarkindec->tarkin_stream, &tarkindec->op);

          while (tarkin_synthesis_frameout (tarkindec->tarkin_stream, &rgb, 0,
                  &date) == 0) {
            GstBuffer *outbuf;

            layer = &tarkindec->tarkin_stream->layer->desc;

            if (!GST_PAD_CAPS (tarkindec->srcpad)) {
              if (gst_pad_try_set_caps (tarkindec->srcpad, GST_CAPS_NEW ("tarkin_raw", "video/x-raw-rgb", "bpp", GST_PROPS_INT (24), "depth", GST_PROPS_INT (24), "endianness", GST_PROPS_INT (G_BYTE_ORDER), "red_mask", GST_PROPS_INT (0xff0000), "green_mask", GST_PROPS_INT (0xff00), "blue_mask", GST_PROPS_INT (0xff), "width", GST_PROPS_INT (layer->width), "height", GST_PROPS_INT (layer->height), "framerate", GST_PROPS_FLOAT (0.)  /* FIXME!!! */
                      )) <= 0) {
                GST_ELEMENT_ERROR (tarkindec, CORE, NEGOTATION, (NULL),
                    ("could not output format"));
                gst_buffer_unref (buf);
                return;
              }
            }
            outbuf = gst_buffer_new ();
            GST_BUFFER_DATA (outbuf) = rgb;
            GST_BUFFER_SIZE (outbuf) = layer->width * layer->height * 3;
            GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_DONTFREE);
            gst_pad_push (tarkindec->srcpad, GST_DATA (outbuf));

            tarkin_synthesis_freeframe (tarkindec->tarkin_stream, rgb);
          }
        }
      }
    }
    gst_buffer_unref (buf);
  }
}
예제 #2
0
파일: tarkin.c 프로젝트: FLYKingdom/vlc
/****************************************************************************
 * DecodeBlock: the whole thing
 ****************************************************************************
 * This function must be fed with ogg packets.
 ****************************************************************************/
static void *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
{
    decoder_sys_t *p_sys = p_dec->p_sys;
    block_t *p_block;
    ogg_packet oggpacket;

    if( !pp_block ) return NULL;

    if( *pp_block )
    {
        /* Block to Ogg packet */
        oggpacket.packet = (*pp_block)->p_buffer;
        oggpacket.bytes = (*pp_block)->i_buffer;
    }
    else
    {
        /* Block to Ogg packet */
        oggpacket.packet = NULL;
        oggpacket.bytes = 0;
    }

    p_block = *pp_block;

    oggpacket.granulepos = -1;
    oggpacket.b_o_s = 0;
    oggpacket.e_o_s = 0;
    oggpacket.packetno = 0;

    if( p_sys->i_headers == 0 )
    {
        /* Take care of the initial Tarkin header */

        oggpacket.b_o_s = 1; /* yes this actually is a b_o_s packet :) */
        if( tarkin_synthesis_headerin( &p_sys->ti, &p_sys->tc, &oggpacket )
            < 0 )
        {
            msg_Err( p_dec, "this bitstream does not contain Tarkin "
                     "video data.");
            block_Release( p_block );
            return NULL;
        }
        p_sys->i_headers++;

        block_Release( p_block );
        return NULL;
    }

    if( p_sys->i_headers == 1 )
    {
        if( tarkin_synthesis_headerin( &p_sys->ti, &p_sys->tc, &oggpacket )
            < 0 )
        {
            msg_Err( p_dec, "2nd Tarkin header is corrupted." );
            block_Release( p_block );
            return NULL;
        }
        p_sys->i_headers++;
        block_Release( p_block );
        return NULL;
    }

    if( p_sys->i_headers == 2 )
    {
        if( tarkin_synthesis_headerin( &p_sys->ti, &p_sys->tc, &oggpacket )
            < 0 )
        {
            msg_Err( p_dec, "3rd Tarkin header is corrupted." );
            block_Release( p_block );
            return NULL;
        }
        p_sys->i_headers++;

        /* Initialize the tarkin decoder */
        tarkin_synthesis_init( p_sys->tarkin_stream, &p_sys->ti );

        msg_Err( p_dec, "Tarkin codec initialized");

        block_Release( p_block );
        return NULL;
    }

    return DecodePacket( p_dec, pp_block, &oggpacket );
}