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/* GStreamer mpeg2enc (mjpegtools) wrapper
* (c) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
*
* gstmpeg2encpicturereader.cc: GStreamer/mpeg2enc input 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 <encoderparams.hh>
#include "gstmpeg2encpicturereader.hh"
/*
* Class init stuff.
*/
GstMpeg2EncPictureReader::GstMpeg2EncPictureReader (GstPad * in_pad,
const GstCaps * in_caps, EncoderParams * params):
PictureReader (*params)
{
pad = in_pad;
caps = gst_caps_copy (in_caps);
}
GstMpeg2EncPictureReader::~GstMpeg2EncPictureReader ()
{
gst_caps_free (caps);
}
/*
* Get input picture parameters (width/height etc.).
*/
void
GstMpeg2EncPictureReader::StreamPictureParams (MPEG2EncInVidParams & strm)
{
GstStructure *structure = gst_caps_get_structure (caps, 0);
gint width, height;
gdouble fps;
gst_structure_get_int (structure, "width", &width);
gst_structure_get_int (structure, "height", &height);
gst_structure_get_double (structure, "framerate", &fps);
strm.horizontal_size = width;
strm.vertical_size = height;
strm.frame_rate_code = mpeg_framerate_code (mpeg_conform_framerate (fps));
strm.interlacing_code = Y4M_ILACE_NONE;
strm.aspect_ratio_code = mpeg_guess_mpeg_aspect_code (2, y4m_sar_SQUARE,
strm.horizontal_size, strm.vertical_size);
/* FIXME:
* strm.interlacing_code = y4m_si_get_interlace(&si);
* sar = y4m_si_get_sampleaspect(&si);
* strm.aspect_ratio_code =
* mpeg_guess_mpeg_aspect_code(2, sar,
* strm.horizontal_size,
* strm.vertical_size);
*/
}
/*
* Read a frame. Return true means EOS or error.
*/
bool GstMpeg2EncPictureReader::LoadFrame ()
{
GstData *
data;
GstBuffer *
buf = NULL;
gint
i,
x,
y,
n;
guint8 *
frame;
GstFormat
fmt = GST_FORMAT_DEFAULT;
gint64
pos = 0, tot = 0;
gst_pad_query (GST_PAD_PEER (pad), GST_QUERY_POSITION, &fmt, &pos);
gst_pad_query (GST_PAD_PEER (pad), GST_QUERY_TOTAL, &fmt, &tot);
do {
if ((data = (GstData *) gst_pad_get_element_private (pad))) {
gst_pad_set_element_private (pad, NULL);
} else if (!(data = gst_pad_pull (pad))) {
GST_ELEMENT_ERROR (gst_pad_get_parent (pad), RESOURCE, READ,
(NULL), (NULL));
return true;
}
if (GST_IS_EVENT (data)) {
if (GST_EVENT_TYPE (data) == GST_EVENT_EOS) {
gst_event_unref (GST_EVENT (data));
return true;
} else {
gst_pad_event_default (pad, GST_EVENT (data));
}
} else {
buf = GST_BUFFER (data);
}
} while (!buf);
frame = GST_BUFFER_DATA (buf);
n = frames_read % input_imgs_buf_size;
x = encparams.horizontal_size;
y = encparams.vertical_size;
for (i = 0; i < y; i++) {
memcpy (input_imgs_buf[n][0] + i * encparams.phy_width, frame, x);
frame += x;
}
lum_mean[n] = LumMean (input_imgs_buf[n][0]);
x >>= 1;
y >>= 1;
for (i = 0; i < y; i++) {
memcpy (input_imgs_buf[n][1] + i * encparams.phy_chrom_width, frame, x);
frame += x;
}
for (i = 0; i < y; i++) {
memcpy (input_imgs_buf[n][2] + i * encparams.phy_chrom_width, frame, x);
frame += x;
}
gst_buffer_unref (buf);
return false;
}
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