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/* GStreamer mplex (mjpegtools) wrapper
* (c) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
* (c) 2008 Mark Nauwelaerts <mnauw@users.sourceforge.net>
*
* gstmplexibitstream.hh: gstreamer/mplex input bitstream wrapper
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstmplex.hh"
#include "gstmplexibitstream.hh"
/*
* Class init/exit functions.
*/
GstMplexIBitStream::GstMplexIBitStream (GstMplexPad * _data, guint buf_size):
IBitStream ()
{
mpad = _data;
mplex = GST_MPLEX (GST_PAD_PARENT (mpad->pad));
eos = FALSE;
SetBufSize (buf_size);
eobs = false;
byteidx = 0;
}
/*
* Read data.
*/
size_t
GstMplexIBitStream::ReadStreamBytes (uint8_t * buf, size_t size =
BUFFER_SIZE)
{
gpointer data;
GST_MPLEX_MUTEX_LOCK (mplex);
GST_DEBUG_OBJECT (mplex, "needing %d bytes", (guint) size);
while (gst_adapter_available (mpad->adapter) < size
&& !mplex->eos && !mpad->eos) {
mpad->needed = size;
GST_MPLEX_SIGNAL (mplex, mpad);
GST_MPLEX_WAIT (mplex, mpad);
}
mpad->needed = 0;
size = MIN (size, gst_adapter_available (mpad->adapter));
if (size) {
data = gst_adapter_take (mpad->adapter, size);
memcpy (buf, data, size);
g_free (data);
}
GST_MPLEX_MUTEX_UNLOCK (mplex);
return size;
}
/*
* Are we at EOS?
*/
bool GstMplexIBitStream::EndOfStream (void)
{
return eos;
}
bool GstMplexIBitStream::ReadBuffer ()
{
return ReadIntoBuffer (BUFFER_SIZE);
}
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