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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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <encoderparams.hh>
#include <string.h>
#include "gstmpeg2enc.hh"
#include "gstmpeg2encpicturereader.hh"
/*
* Class init stuff.
*/
GstMpeg2EncPictureReader::GstMpeg2EncPictureReader (GstElement * in_element, GstCaps * in_caps, EncoderParams * params):
PictureReader (*params)
{
element = in_element;
gst_object_ref (element);
caps = in_caps;
gst_caps_ref (caps);
}
GstMpeg2EncPictureReader::~GstMpeg2EncPictureReader ()
{
gst_caps_unref (caps);
gst_object_unref (element);
}
/*
* Get input picture parameters (width/height etc.).
*/
void
GstMpeg2EncPictureReader::StreamPictureParams (MPEG2EncInVidParams & strm)
{
GstStructure *structure = gst_caps_get_structure (caps, 0);
gint width, height;
const GValue *fps_val;
const GValue *par_val;
y4m_ratio_t fps;
y4m_ratio_t par;
if (!gst_structure_get_int (structure, "width", &width))
width = -1;
if (!gst_structure_get_int (structure, "height", &height))
height = -1;
fps_val = gst_structure_get_value (structure, "framerate");
if (fps_val != NULL) {
fps.n = gst_value_get_fraction_numerator (fps_val);
fps.d = gst_value_get_fraction_denominator (fps_val);
strm.frame_rate_code = mpeg_framerate_code (fps);
} else
strm.frame_rate_code = 0;
par_val = gst_structure_get_value (structure, "pixel-aspect-ratio");
if (par_val != NULL) {
par.n = gst_value_get_fraction_numerator (par_val);
par.d = gst_value_get_fraction_denominator (par_val);
} else {
/* By default, assume square pixels */
par.n = 1;
par.d = 1;
}
strm.horizontal_size = width;
strm.vertical_size = height;
strm.interlacing_code = Y4M_ILACE_NONE;
strm.aspect_ratio_code = mpeg_guess_mpeg_aspect_code (2, par,
strm.horizontal_size, strm.vertical_size);
GST_DEBUG_OBJECT (element, "Guessing aspect ratio code for PAR %d/%d "
"yielded: %d", par.n, par.d, strm.aspect_ratio_code);
}
/*
* Read a frame. Return true means EOS or error.
*/
bool
#if GST_MJPEGTOOLS_API >= 10900
GstMpeg2EncPictureReader::LoadFrame (ImagePlanes & image)
#else
GstMpeg2EncPictureReader::LoadFrame ()
#endif
{
#if GST_MJPEGTOOLS_API < 10900
gint n;
#endif
gint i, x, y, s;
guint8 *frame;
GstMpeg2enc *enc;
GstVideoFrame vframe;
enc = GST_MPEG2ENC (element);
GST_MPEG2ENC_MUTEX_LOCK (enc);
/* hang around until the element provides us with a buffer */
while (!enc->buffer) {
if (enc->eos) {
GST_MPEG2ENC_MUTEX_UNLOCK (enc);
/* inform the mpeg encoding loop that it can give up */
return TRUE;
}
GST_MPEG2ENC_WAIT (enc);
}
gst_video_frame_map (&vframe, &enc->vinfo, enc->buffer, GST_MAP_READ);
// frame = GST_BUFFER_DATA (enc->buffer);
#if GST_MJPEGTOOLS_API < 10900
n = frames_read % input_imgs_buf_size;
#endif
frame = GST_VIDEO_FRAME_COMP_DATA (&vframe, 0);
s = GST_VIDEO_FRAME_COMP_STRIDE (&vframe, 0);
x = encparams.horizontal_size;
y = encparams.vertical_size;
for (i = 0; i < y; i++) {
#if GST_MJPEGTOOLS_API >= 10900
memcpy (image.Plane (0) + i * encparams.phy_width, frame, x);
#else
memcpy (input_imgs_buf[n][0] + i * encparams.phy_width, frame, x);
#endif
frame += s;
}
#if GST_MJPEGTOOLS_API < 10900
lum_mean[n] = LumMean (input_imgs_buf[n][0]);
#endif
frame = GST_VIDEO_FRAME_COMP_DATA (&vframe, 1);
s = GST_VIDEO_FRAME_COMP_STRIDE (&vframe, 1);
x >>= 1;
y >>= 1;
for (i = 0; i < y; i++) {
#if GST_MJPEGTOOLS_API >= 10900
memcpy (image.Plane (1) + i * encparams.phy_chrom_width, frame, x);
#else
memcpy (input_imgs_buf[n][1] + i * encparams.phy_chrom_width, frame, x);
#endif
frame += s;
}
frame = GST_VIDEO_FRAME_COMP_DATA (&vframe, 2);
s = GST_VIDEO_FRAME_COMP_STRIDE (&vframe, 2);
for (i = 0; i < y; i++) {
#if GST_MJPEGTOOLS_API >= 10900
memcpy (image.Plane (2) + i * encparams.phy_chrom_width, frame, x);
#else
memcpy (input_imgs_buf[n][2] + i * encparams.phy_chrom_width, frame, x);
#endif
frame += s;
}
gst_video_frame_unmap (&vframe);
gst_buffer_unref (enc->buffer);
enc->buffer = NULL;
/* inform the element the buffer has been processed */
GST_MPEG2ENC_SIGNAL (enc);
GST_MPEG2ENC_MUTEX_UNLOCK (enc);
return FALSE;
}
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