1 /* GStreamer Sub-Picture Unit - PGS handling
2  * Copyright (C) 2009 Jan Schmidt <thaytan@noraisin.net>
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Library General Public
6  * License as published by the Free Software Foundation; either
7  * version 2 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12  * Library General Public License for more details.
13  *
14  * You should have received a copy of the GNU Library General Public
15  * License along with this library; if not, write to the
16  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
17  * Boston, MA 02110-1301, USA.
18  */
19 
20 #ifndef __GSTSPU_PGS_H__
21 #define __GSTSPU_PGS_H__
22 
23 #include "gstspu-common.h"
24 
25 typedef struct SpuPgsState SpuPgsState;
26 typedef enum PgsCompositionObjectFlags PgsCompositionObjectFlags;
27 typedef enum PgsPresentationSegmentFlags PgsPresentationSegmentFlags;
28 typedef enum PgsObjectUpdateFlags PgsObjectUpdateFlags;
29 
30 typedef struct PgsPresentationSegment PgsPresentationSegment;
31 typedef struct PgsCompositionObject PgsCompositionObject;
32 
33 enum PgsPresentationSegmentFlags
34 {
35   PGS_PRES_SEGMENT_FLAG_UPDATE_PALETTE = 0x80
36 };
37 
38 enum PgsCompositionObjectFlags
39 {
40   PGS_COMPOSITION_OBJECT_FLAG_CROPPED = 0x80,
41   PGS_COMPOSITION_OBJECT_FLAG_FORCED = 0x40
42 };
43 
44 enum PgsObjectUpdateFlags
45 {
46   /* Set in an object_update if this is the beginning of new RLE data.
47    * If not set, the data is a continuation to be appended */
48   PGS_OBJECT_UPDATE_FLAG_START_RLE = 0x80,
49   PGS_OBJECT_UPDATE_FLAG_END_RLE = 0x40 /* This one is a guess */
50 };
51 
52 struct PgsPresentationSegment
53 {
54   guint16 composition_no;
55   guint8 composition_state;
56 
57   PgsPresentationSegmentFlags flags;
58 
59   guint8 palette_id;
60 
61   guint16 vid_w, vid_h;
62   guint8  vid_fps_code;
63 
64   GArray *objects;
65 };
66 
67 struct PgsCompositionObject
68 {
69   guint16 id;
70   guint8 version;
71   PgsCompositionObjectFlags flags;
72 
73   guint8 win_id;
74 
75   guint8 rle_data_ver;
76   guint8 *rle_data;
77   guint32 rle_data_size;
78   guint32 rle_data_used;
79 
80   /* Top left corner of this object */
81   guint16 x, y;
82 
83   /* Only valid if PGS_COMPOSITION_OBJECT_FLAG_CROPPED is set */
84   guint16 crop_x, crop_y, crop_w, crop_h;
85 };
86 
87 struct SpuPgsState {
88   GstBuffer *pending_cmd;
89 
90   gboolean in_presentation_segment;
91   gboolean have_presentation_segment;
92 
93   PgsPresentationSegment pres_seg;
94 
95   SpuColour palette[256];
96 
97   guint16 win_x, win_y, win_w, win_h;
98 };
99 
100 void gstspu_pgs_handle_new_buf (GstDVDSpu * dvdspu, GstClockTime event_ts, GstBuffer *buf);
101 gboolean gstspu_pgs_execute_event (GstDVDSpu *dvdspu);
102 void gstspu_pgs_render (GstDVDSpu *dvdspu, GstVideoFrame *frame);
103 gboolean gstspu_pgs_handle_dvd_event (GstDVDSpu *dvdspu, GstEvent *event);
104 void gstspu_pgs_flush (GstDVDSpu *dvdspu);
105 
106 #endif
107