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112 lines
2.5 KiB
C++
112 lines
2.5 KiB
C++
/* GStreamer mplex (mjpegtools) wrapper
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* (c) 2003 Ronald Bultje <rbultje@ronald.bitfreak.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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, 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 "gstmplexibitstream.hh"
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/*
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* Class init/exit functions.
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*/
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GstMplexIBitStream::GstMplexIBitStream (GstPad *_pad,
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guint buf_size) :
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IBitStream ()
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{
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guint8 *data;
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pad = _pad;
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bs = gst_bytestream_new (pad);
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eos = FALSE;
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streamname = g_strdup (gst_pad_get_name (_pad));
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SetBufSize (buf_size);
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eobs = false;
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byteidx = 0;
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/* we peek 1 byte (not even caring about the return value) so we
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* are sure that we have data and thus capsnego must be completed
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* when we return. */
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gst_bytestream_peek_bytes (bs, &data, 1);
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if (!ReadIntoBuffer () && buffered == 0) {
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GST_ELEMENT_ERROR (gst_pad_get_parent (_pad), RESOURCE, READ, (""),
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("Failed to read from input pad %s",
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gst_pad_get_name (pad)));
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}
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}
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GstMplexIBitStream::~GstMplexIBitStream (void)
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{
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gst_bytestream_destroy (bs);
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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,
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size_t size)
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{
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guint8 *data;
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guint read;
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if (eos)
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return 0;
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if ((read = gst_bytestream_peek_bytes (bs, &data, size)) != size) {
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GstEvent *event;
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guint pending;
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gst_bytestream_get_status (bs, &pending, &event);
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if (event) {
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_EOS:
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eos = TRUE;
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break;
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default:
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break;
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}
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gst_event_unref (event);
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}
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}
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memcpy (buf, data, read);
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gst_bytestream_flush_fast (bs, read);
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return read;
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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
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GstMplexIBitStream::EndOfStream (void)
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{
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return eos;
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}
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