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