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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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946be1a85a
Downstream might need the start code offset when decoding. Previously this computation would be scattered in multiple sites. This is error prone, so move it to the base class. Subclasses can access slice->sc_offset directly without computing the address themselves knowing that the size will also take the start code into account. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1013>
192 lines
4.8 KiB
C
192 lines
4.8 KiB
C
/* GStreamer
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* Copyright (C) 2020 Intel Corporation
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* Author: He Junyan <junyan.he@intel.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_MPEG2_PICTURE_H__
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#define __GST_MPEG2_PICTURE_H__
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#include <gst/codecs/codecs-prelude.h>
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#include <gst/codecparsers/gstmpegvideoparser.h>
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#include <gst/video/video.h>
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G_BEGIN_DECLS
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/**
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* GST_TYPE_MPEG2_PICTURE:
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*
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* Since: 1.20
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*/
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#define GST_TYPE_MPEG2_PICTURE (gst_mpeg2_picture_get_type())
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/**
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* GST_IS_MPEG2_PICTURE:
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*
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* Since: 1.20
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*/
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#define GST_IS_MPEG2_PICTURE(obj) (GST_IS_MINI_OBJECT_TYPE(obj, GST_TYPE_MPEG2_PICTURE))
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/**
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* GST_MPEG2_PICTURE:
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*
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* Since: 1.20
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*/
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#define GST_MPEG2_PICTURE(obj) ((GstMpeg2Picture *)obj)
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typedef struct _GstMpeg2Slice GstMpeg2Slice;
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typedef struct _GstMpeg2Picture GstMpeg2Picture;
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/**
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* GstMpeg2Slice:
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*
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* Since: 1.20
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*/
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struct _GstMpeg2Slice
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{
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/*< private >*/
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GstMpegVideoQuantMatrixExt *quant_matrix; /* The parameter set */
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GstMpegVideoPictureHdr *pic_hdr;
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GstMpegVideoPictureExt *pic_ext;
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GstMpegVideoSliceHdr header;
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/* parsed video packet (doesn't take ownership of raw data) */
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GstMpegVideoPacket packet;
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/* offset of the start code for the slice */
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guint sc_offset;
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/* size, including the start code */
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guint size;
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};
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/**
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* GstMpeg2Picture:
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*
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* Since: 1.20
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*/
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struct _GstMpeg2Picture
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{
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/*< private >*/
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GstMiniObject parent;
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/* From GstVideoCodecFrame */
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guint32 system_frame_number;
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gboolean needed_for_output;
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/* For interlaced streams */
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GstMpeg2Picture *first_field;
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GstVideoBufferFlags buffer_flags;
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gint pic_order_cnt;
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gint tsn;
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GstMpegVideoPictureStructure structure;
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GstMpegVideoPictureType type;
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gpointer user_data;
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GDestroyNotify notify;
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};
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/**
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* GST_MPEG2_PICTURE_IS_REF:
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* @picture: a #GstMpeg2Picture
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*
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* Check whether @picture's type is I or P
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*
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* Since: 1.20
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*/
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#define GST_MPEG2_PICTURE_IS_REF(picture) \
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(((GstMpeg2Picture *) picture)->type == GST_MPEG_VIDEO_PICTURE_TYPE_I || \
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((GstMpeg2Picture *) picture)->type == GST_MPEG_VIDEO_PICTURE_TYPE_P)
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GST_CODECS_API
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GType gst_mpeg2_picture_get_type (void);
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GST_CODECS_API
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GstMpeg2Picture * gst_mpeg2_picture_new (void);
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static inline GstMpeg2Picture *
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gst_mpeg2_picture_ref (GstMpeg2Picture * picture)
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{
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return (GstMpeg2Picture *) gst_mini_object_ref (GST_MINI_OBJECT_CAST (picture));
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}
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static inline void
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gst_mpeg2_picture_unref (GstMpeg2Picture * picture)
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{
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gst_mini_object_unref (GST_MINI_OBJECT_CAST (picture));
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}
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static inline gboolean
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gst_mpeg2_picture_replace (GstMpeg2Picture ** old_picture,
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GstMpeg2Picture * new_picture)
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{
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return gst_mini_object_replace ((GstMiniObject **) old_picture,
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(GstMiniObject *) new_picture);
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}
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static inline void
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gst_mpeg2_picture_clear (GstMpeg2Picture ** picture)
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{
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if (picture && *picture) {
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gst_mpeg2_picture_unref (*picture);
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*picture = NULL;
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}
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}
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GST_CODECS_API
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void gst_mpeg2_picture_set_user_data (GstMpeg2Picture * picture,
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gpointer user_data,
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GDestroyNotify notify);
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GST_CODECS_API
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gpointer gst_mpeg2_picture_get_user_data (GstMpeg2Picture * picture);
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/**
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* GstMpeg2Dpb:
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*
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* Since: 1.20
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*/
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typedef struct _GstMpeg2Dpb GstMpeg2Dpb;
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GST_CODECS_API
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GstMpeg2Dpb * gst_mpeg2_dpb_new (void);
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GST_CODECS_API
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void gst_mpeg2_dpb_free (GstMpeg2Dpb * dpb);
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GST_CODECS_API
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void gst_mpeg2_dpb_clear (GstMpeg2Dpb * dpb);
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GST_CODECS_API
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void gst_mpeg2_dpb_add (GstMpeg2Dpb * dpb,
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GstMpeg2Picture * picture);
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GST_CODECS_API
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GstMpeg2Picture * gst_mpeg2_dpb_bump (GstMpeg2Dpb * dpb);
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GST_CODECS_API
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gboolean gst_mpeg2_dpb_need_bump (GstMpeg2Dpb * dpb);
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GST_CODECS_API
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void gst_mpeg2_dpb_get_neighbours (GstMpeg2Dpb * dpb,
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GstMpeg2Picture * picture,
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GstMpeg2Picture ** prev_picture_ptr,
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GstMpeg2Picture ** next_picture_ptr);
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstMpeg2Picture, gst_mpeg2_picture_unref)
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G_END_DECLS
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#endif /* __GST_MPEG2_PICTURE_H__ */
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