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);
}
}
/****************************************************************************
* 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 );
}