gstreamer/ext/mpeg2enc/gstmpeg2encoder.cc

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/* GStreamer mpeg2enc (mjpegtools) wrapper
* (c) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
* (c) 2006 Mark Nauwelaerts <manauw@skynet.be>
*
* gstmpeg2encoder.cc: gstreamer/mpeg2enc encoder class
*
* 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 <mpegconsts.h>
#include <quantize.hh>
#include <ratectl.hh>
#include <seqencoder.hh>
#include <mpeg2coder.hh>
#include "gstmpeg2enc.hh"
#include "gstmpeg2encoder.hh"
/*
* Class init stuff.
*/
GstMpeg2Encoder::GstMpeg2Encoder (GstMpeg2EncOptions * options, GstElement * in_element, GstCaps * in_caps):
MPEG2Encoder (*options)
{
element = in_element;
gst_object_ref (element);
caps = in_caps;
gst_caps_ref (in_caps);
init_done = FALSE;
}
GstMpeg2Encoder::~GstMpeg2Encoder ()
{
gst_caps_unref (caps);
gst_object_unref (element);
}
gboolean GstMpeg2Encoder::setup ()
{
MPEG2EncInVidParams
strm;
GstMpeg2enc *
enc;
enc = GST_MPEG2ENC (element);
/* I/O */
reader = new GstMpeg2EncPictureReader (element, caps, &parms);
reader->StreamPictureParams (strm);
#ifdef GST_MJPEGTOOLS_18x
/* chain thread caters for reading, do not need another thread for this */
options.allow_parallel_read = FALSE;
#endif
if (options.SetFormatPresets (strm)) {
return FALSE;
}
writer = new GstMpeg2EncStreamWriter (enc->srcpad, &parms);
/* encoding internals */
quantizer = new Quantizer (parms);
bitrate_controller = new OnTheFlyRateCtl (parms);
#ifdef GST_MJPEGTOOLS_18x
/* sequencer */
seqencoder = new SeqEncoder (parms, *reader, *quantizer,
*writer, *bitrate_controller);
#else
coder = new MPEG2Coder (parms, *writer);
/* sequencer */
seqencoder = new SeqEncoder (parms, *reader, *quantizer,
*writer, *coder, *bitrate_controller);
#endif
return TRUE;
}
void
GstMpeg2Encoder::init ()
{
if (!init_done) {
parms.Init (options);
reader->Init ();
quantizer->Init ();
#ifdef GST_MJPEGTOOLS_18x
seqencoder->Init ();
#endif
init_done = TRUE;
}
}
/*
* Process all input provided by the reader until it signals eos.
*/
void
GstMpeg2Encoder::encode ()
{
/* hm, this is all... eek! */
#ifdef GST_MJPEGTOOLS_18x
seqencoder->EncodeStream ();
#else
seqencoder->Encode ();
#endif
}
/*
* Get current output format.
*/
GstCaps *
GstMpeg2Encoder::getFormat ()
{
y4m_ratio_t fps = mpeg_framerate (options.frame_rate);
return gst_caps_new_simple ("video/mpeg",
"systemstream", G_TYPE_BOOLEAN, FALSE,
"mpegversion", G_TYPE_INT, options.mpeg,
"width", G_TYPE_INT, options.in_img_width,
"height", G_TYPE_INT, options.in_img_height,
"framerate", GST_TYPE_FRACTION, fps.n, fps.d, NULL);
}