mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-18 06:16:36 +00:00
113 lines
2.5 KiB
C++
113 lines
2.5 KiB
C++
/* GStreamer mplex (mjpegtools) wrapper
|
|
* (c) 2003 Ronald Bultje <rbultje@ronald.bitfreak.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., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <string.h>
|
|
|
|
#include "gstmplexibitstream.hh"
|
|
|
|
/*
|
|
* Class init/exit functions.
|
|
*/
|
|
|
|
GstMplexIBitStream::GstMplexIBitStream (GstPad * _pad, guint buf_size):
|
|
IBitStream ()
|
|
{
|
|
guint8 *data;
|
|
|
|
pad = _pad;
|
|
bs = gst_bytestream_new (pad);
|
|
eos = FALSE;
|
|
|
|
streamname = g_strdup (gst_pad_get_name (_pad));
|
|
|
|
SetBufSize (buf_size);
|
|
eobs = false;
|
|
byteidx = 0;
|
|
|
|
/* we peek 1 byte (not even caring about the return value) so we
|
|
* are sure that we have data and thus capsnego must be completed
|
|
* when we return. */
|
|
gst_bytestream_peek_bytes (bs, &data, 1);
|
|
|
|
if (!ReadIntoBuffer () && buffered == 0) {
|
|
GST_ELEMENT_ERROR (gst_pad_get_parent (_pad), RESOURCE, READ, (NULL),
|
|
("Failed to read from input pad %s", gst_pad_get_name (pad)));
|
|
}
|
|
}
|
|
|
|
GstMplexIBitStream::~GstMplexIBitStream (void)
|
|
{
|
|
gst_bytestream_destroy (bs);
|
|
}
|
|
|
|
/*
|
|
* Read data.
|
|
*/
|
|
|
|
size_t
|
|
GstMplexIBitStream::ReadStreamBytes (uint8_t * buf, size_t size)
|
|
{
|
|
guint8 *data;
|
|
|
|
guint read = 0;
|
|
|
|
if (eos)
|
|
return 0;
|
|
|
|
while (!eos && (read = gst_bytestream_peek_bytes (bs, &data, size)) != size) {
|
|
GstEvent *event;
|
|
|
|
guint pending;
|
|
|
|
gst_bytestream_get_status (bs, &pending, &event);
|
|
if (event) {
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_EOS:
|
|
eos = TRUE;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
gst_event_unref (event);
|
|
}
|
|
}
|
|
|
|
if (read > 0) {
|
|
memcpy (buf, data, read);
|
|
gst_bytestream_flush_fast (bs, read);
|
|
}
|
|
|
|
return read;
|
|
}
|
|
|
|
/*
|
|
* Are we at EOS?
|
|
*/
|
|
|
|
bool
|
|
GstMplexIBitStream::EndOfStream (void)
|
|
{
|
|
return eos;
|
|
}
|