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v4l2codecs: Implement a MPEG2 V4L2 decoder element

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Implement a MPEG2 V4L2 decoder element based on the previous h264
implementation.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1013>
This commit is contained in:
Daniel Almeida 2021-04-06 16:40:28 -03:00 committed by GStreamer Marge Bot
parent 4fe6bc1afe
commit 477b824f8e
4 changed files with 1099 additions and 0 deletions
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1037
subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecmpeg2dec.c Normal file
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53
subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecmpeg2dec.h Normal file
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@ -0,0 +1,53 @@
/* GStreamer
* Copyright (C) 2020 Daniel Almeida <daniel.almeida@collabora.com>
*
* 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.
*/
#ifndef __GST_V4L2_CODEC_MPEG2_DEC_H__
#define __GST_V4L2_CODEC_MPEG2_DEC_H__
#define GST_USE_UNSTABLE_API
#include <gst/codecs/gstmpeg2decoder.h>
#include "gstv4l2decoder.h"
G_BEGIN_DECLS
#define GST_TYPE_V4L2_CODEC_MPEG2_DEC (gst_v4l2_codec_mpeg2_dec_get_type())
#define GST_V4L2_CODEC_MPEG2_DEC(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_V4L2_CODEC_MPEG2_DEC,GstV4l2CodecMpeg2Dec))
#define GST_V4L2_CODEC_MPEG2_DEC_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_V4L2_CODEC_MPEG2_DEC,GstV4l2CodecMpeg2DecClass))
#define GST_V4L2_CODEC_MPEG2_DEC_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_V4L2_CODEC_MPEG2_DEC, GstV4l2CodecMpeg2DecClass))
#define GST_IS_V4L2_CODEC_MPEG2_DEC(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_V4L2_CODEC_MPEG2_DEC))
#define GST_IS_V4L2_CODEC_MPEG2_DEC_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_V4L2_CODEC_MPEG2_DEC))
typedef struct _GstV4l2CodecMpeg2Dec GstV4l2CodecMpeg2Dec;
typedef struct _GstV4l2CodecMpeg2DecClass GstV4l2CodecMpeg2DecClass;
struct _GstV4l2CodecMpeg2DecClass
{
GstMpeg2DecoderClass parent_class;
GstV4l2CodecDevice *device;
};
GType gst_v4l2_codec_mpeg2_dec_get_type (void);
void gst_v4l2_codec_mpeg2_dec_register (GstPlugin * plugin,
GstV4l2CodecDevice * device,
guint rank);
G_END_DECLS
#endif /* __GST_V4L2_MPEG2_DEC_H__ */

1
subprojects/gst-plugins-bad/sys/v4l2codecs/meson.build
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@ -3,6 +3,7 @@ v4l2codecs_sources = [
'gstv4l2codecallocator.c',
'gstv4l2codecdevice.c',
'gstv4l2codech264dec.c',
'gstv4l2codecmpeg2dec.c',
'gstv4l2codecpool.c',
'gstv4l2codecvp8dec.c',
'gstv4l2decoder.c',

8
subprojects/gst-plugins-bad/sys/v4l2codecs/plugin.c
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@ -24,6 +24,7 @@
#include "gstv4l2codecdevice.h"
#include "gstv4l2codech264dec.h"
#include "gstv4l2codecmpeg2dec.h"
#include "gstv4l2codecvp8dec.h"
#include "gstv4l2decoder.h"
#include "linux/v4l2-controls.h"
@ -58,6 +59,13 @@ register_video_decoder (GstPlugin * plugin, GstV4l2CodecDevice * device)
gst_v4l2_codec_vp8_dec_register (plugin, decoder,
device, GST_RANK_PRIMARY + 1);
break;
case V4L2_PIX_FMT_MPEG2_SLICE:
GST_INFO_OBJECT (decoder, "Registering %s as Mpeg2 Decoder",
device->name);
gst_v4l2_codec_mpeg2_dec_register (plugin, device,
GST_RANK_PRIMARY + 1);
break;
default:
GST_FIXME_OBJECT (decoder, "%" GST_FOURCC_FORMAT " is not supported.",
GST_FOURCC_ARGS (fmt));