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meta.h
Go to the documentation of this file.
1/* Simple Plugin API */
2/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
3/* SPDX-License-Identifier: MIT */
4
5#ifndef SPA_META_H
6#define SPA_META_H
7
8#ifdef __cplusplus
9 extern "C" {
10#endif
11
12#include <spa/utils/defs.h>
13#include <spa/pod/pod.h>
14
15#ifndef SPA_API_META
16 #ifdef SPA_API_IMPL
17 #define SPA_API_META SPA_API_IMPL
18 #else
19 #define SPA_API_META static inline
20 #endif
21#endif
22
27
28 enum spa_meta_type {
29 SPA_META_Invalid,
30 SPA_META_Header,
31 SPA_META_VideoCrop,
32 SPA_META_VideoDamage,
33 SPA_META_Bitmap,
34 SPA_META_Cursor,
35 SPA_META_Control,
37 SPA_META_Busy,
38 SPA_META_VideoTransform,
39 SPA_META_SyncTimeline,
40
41 _SPA_META_LAST,
42};
43
50
51 struct spa_meta {
52 uint32_t type;
53 uint32_t size;
54 void *data;
55};
56
57 SPA_API_META void *spa_meta_first(const struct spa_meta *m) {
58 return m->data;
59}
60
61 SPA_API_META void *spa_meta_end(const struct spa_meta *m) {
62 return SPA_PTROFF(m->data,m->size,void);
63}
64#define spa_meta_check(p,m) (SPA_PTROFF(p,sizeof(*(p)),void) <= spa_meta_end(m))
65
67
68 * timestamps.
69 */
70 struct spa_meta_header {
71#define SPA_META_HEADER_FLAG_DISCONT (1 << 0)
72#define SPA_META_HEADER_FLAG_CORRUPTED (1 << 1)
73#define SPA_META_HEADER_FLAG_MARKER (1 << 2)
74#define SPA_META_HEADER_FLAG_HEADER (1 << 3)
75#define SPA_META_HEADER_FLAG_GAP (1 << 4)
76#define SPA_META_HEADER_FLAG_DELTA_UNIT (1 << 5)
77 uint32_t flags;
78 uint32_t offset;
79 int64_t pts;
80 int64_t dts_offset;
81 uint64_t seq;
83};
84
86 struct spa_meta_region {
87 struct spa_region region;
88};
89
90 SPA_API_META bool spa_meta_region_is_valid(const struct spa_meta_region *m) {
91 return m->region.size.width != 0 && m->region.size.height != 0;
92}
93
95#define spa_meta_for_each(pos,meta) \
96 for ((pos) = (__typeof(pos))spa_meta_first(meta); \
97 spa_meta_check(pos, meta); \
98 (pos)++)
99
102
103 * This metadata contains a bitmap image in the given format and size.
104 * It is typically used for cursor images or other small images that are
105 * better transferred inline.
106 */
107 struct spa_meta_bitmap {
108 uint32_t format;
111 struct spa_rectangle size;
112 int32_t stride;
113 uint32_t offset;
117};
118
119 SPA_API_META bool spa_meta_bitmap_is_valid(const struct spa_meta_bitmap *m) {
120 return m->format != 0;
121}
122
128 struct spa_meta_cursor {
129 uint32_t id;
131 uint32_t flags;
132 struct spa_point position;
133 struct spa_point hotspot;
135 uint32_t bitmap_offset;
139};
140
141 SPA_API_META bool spa_meta_cursor_is_valid(const struct spa_meta_cursor *m) {
142 return m->id != 0;
143}
144
146 struct spa_meta_control {
147 struct spa_pod_sequence sequence;
148};
149
151 struct spa_meta_busy {
152 uint32_t flags;
153 uint32_t count;
154};
155
156 enum spa_meta_videotransform_value {
157 SPA_META_TRANSFORMATION_None = 0,
158 SPA_META_TRANSFORMATION_90,
159 SPA_META_TRANSFORMATION_180,
160 SPA_META_TRANSFORMATION_270,
161 SPA_META_TRANSFORMATION_Flipped,
162
164 SPA_META_TRANSFORMATION_Flipped90,
165 SPA_META_TRANSFORMATION_Flipped180,
166 SPA_META_TRANSFORMATION_Flipped270,
167};
168
169/** a transformation of the buffer */
170 struct spa_meta_videotransform {
171 uint32_t transform;
173};
174
181
183 * this metadata as SPA_PARAM_BUFFERS_metaType when negotiating a buffer
184 * layout with 2 extra fds.
185 */
186 struct spa_meta_sync_timeline {
187 uint32_t flags;
188 uint32_t padding;
189 uint64_t acquire_point;
191 uint64_t release_point;
193};
194
198
199#ifdef __cplusplus
200} /* extern "C" */
201#endif
202
203#endif /* SPA_META_H */
defs.h
spa/utils/defs.h
seq
uint32_t int seq
Definition core.h:432
id
uint32_t id
Definition core.h:432
spa_meta_first
SPA_API_META void * spa_meta_first(const struct spa_meta *m)
Definition meta.h:64
spa_meta_bitmap_is_valid
SPA_API_META bool spa_meta_bitmap_is_valid(const struct spa_meta_bitmap *m)
Definition meta.h:132
spa_meta_videotransform_value
spa_meta_videotransform_value
Definition meta.h:169
spa_meta_end
SPA_API_META void * spa_meta_end(const struct spa_meta *m)
Definition meta.h:68
spa_meta_type
spa_meta_type
Definition meta.h:35
spa_meta_region_is_valid
SPA_API_META bool spa_meta_region_is_valid(const struct spa_meta_region *m)
Definition meta.h:103
spa_meta_cursor_is_valid
SPA_API_META bool spa_meta_cursor_is_valid(const struct spa_meta_cursor *m)
Definition meta.h:154
SPA_META_TRANSFORMATION_Flipped270
@ SPA_META_TRANSFORMATION_Flipped270
flip then rotate around 270 degree counter-clockwise
Definition meta.h:179
SPA_META_TRANSFORMATION_Flipped
@ SPA_META_TRANSFORMATION_Flipped
180 degree flipped around the vertical axis.
Definition meta.h:174
SPA_META_TRANSFORMATION_270
@ SPA_META_TRANSFORMATION_270
270 degree counter-clockwise
Definition meta.h:173
SPA_META_TRANSFORMATION_Flipped180
@ SPA_META_TRANSFORMATION_Flipped180
flip then rotate around 180 degree counter-clockwise
Definition meta.h:178
SPA_META_TRANSFORMATION_Flipped90
@ SPA_META_TRANSFORMATION_Flipped90
flip then rotate around 90 degree counter-clockwise
Definition meta.h:177
SPA_META_TRANSFORMATION_None
@ SPA_META_TRANSFORMATION_None
no transform
Definition meta.h:170
SPA_META_TRANSFORMATION_90
@ SPA_META_TRANSFORMATION_90
90 degree counter-clockwise
Definition meta.h:171
SPA_META_TRANSFORMATION_180
@ SPA_META_TRANSFORMATION_180
180 degree counter-clockwise
Definition meta.h:172
SPA_META_VideoDamage
@ SPA_META_VideoDamage
array of struct spa_meta_region with damage, where an invalid entry or end-of-array marks the end.
Definition meta.h:39
SPA_META_Bitmap
@ SPA_META_Bitmap
struct spa_meta_bitmap
Definition meta.h:40
SPA_META_VideoTransform
@ SPA_META_VideoTransform
struct spa_meta_transform
Definition meta.h:45
SPA_META_Cursor
@ SPA_META_Cursor
struct spa_meta_cursor
Definition meta.h:41
SPA_META_Busy
@ SPA_META_Busy
don't write to buffer when count > 0
Definition meta.h:44
SPA_META_VideoCrop
@ SPA_META_VideoCrop
struct spa_meta_region with cropping data
Definition meta.h:38
SPA_META_SyncTimeline
@ SPA_META_SyncTimeline
struct spa_meta_sync_timeline
Definition meta.h:46
SPA_META_Header
@ SPA_META_Header
struct spa_meta_header
Definition meta.h:37
SPA_META_Control
@ SPA_META_Control
metadata contains a spa_meta_control associated with the data
Definition meta.h:42
SPA_META_Invalid
@ SPA_META_Invalid
Definition meta.h:36
_SPA_META_LAST
@ _SPA_META_LAST
not part of ABI/API
Definition meta.h:48
SPA_PTROFF
#define SPA_PTROFF(ptr_, offset_, type_)
Return the address (buffer + offset) as pointer of type.
Definition defs.h:222
SPA_API_META
#define SPA_API_META
Definition meta.h:26
pod.h
spa/pod/pod.h
spa_meta_bitmap
Bitmap information.
Definition meta.h:120
spa_meta_bitmap::size
struct spa_rectangle size
width and height of bitmap
Definition meta.h:124
spa_meta_bitmap::format
uint32_t format
bitmap video format, one of enum spa_video_format.
Definition meta.h:121
spa_meta_bitmap::offset
uint32_t offset
offset of bitmap data in this structure.
Definition meta.h:126
spa_meta_bitmap::stride
int32_t stride
stride of bitmap data
Definition meta.h:125
spa_meta_busy
a busy counter for the buffer
Definition meta.h:164
spa_meta_busy::count
uint32_t count
number of users busy with the buffer
Definition meta.h:166
spa_meta_busy::flags
uint32_t flags
Definition meta.h:165
spa_meta_control
a timed set of events associated with the buffer
Definition meta.h:159
spa_meta_control::sequence
struct spa_pod_sequence sequence
Definition meta.h:160
spa_meta_cursor
Cursor information.
Definition meta.h:141
spa_meta_cursor::flags
uint32_t flags
extra flags
Definition meta.h:144
spa_meta_cursor::hotspot
struct spa_point hotspot
offsets for hotspot in bitmap, this field has no meaning when there is no valid bitmap (see below)
Definition meta.h:146
spa_meta_cursor::id
uint32_t id
cursor id.
Definition meta.h:142
spa_meta_cursor::position
struct spa_point position
position on screen
Definition meta.h:145
spa_meta_cursor::bitmap_offset
uint32_t bitmap_offset
offset of bitmap meta in this structure.
Definition meta.h:148
spa_meta_header
Describes essential buffer header metadata such as flags and timestamps.
Definition meta.h:77
spa_meta_header::offset
uint32_t offset
offset in current cycle
Definition meta.h:91
spa_meta_header::flags
uint32_t flags
flags
Definition meta.h:90
spa_meta_header::pts
int64_t pts
presentation timestamp in nanoseconds
Definition meta.h:92
spa_meta_header::dts_offset
int64_t dts_offset
decoding timestamp as a difference with pts
Definition meta.h:93
spa_meta_region
metadata structure for Region or an array of these for RegionArray
Definition meta.h:99
spa_meta_region::region
struct spa_region region
Definition meta.h:100
spa_meta_sync_timeline
A timeline point for explicit sync.
Definition meta.h:199
spa_meta_sync_timeline::padding
uint32_t padding
Definition meta.h:201
spa_meta_sync_timeline::acquire_point
uint64_t acquire_point
the timeline acquire point, this is when the data can be accessed.
Definition meta.h:202
spa_meta_sync_timeline::release_point
uint64_t release_point
the timeline release point, this timeline point should be signaled when the data is no longer accesse...
Definition meta.h:204
spa_meta_sync_timeline::flags
uint32_t flags
Definition meta.h:200
spa_meta_videotransform
a transformation of the buffer
Definition meta.h:183
spa_meta_videotransform::transform
uint32_t transform
orientation transformation that was applied to the buffer, one of enum spa_meta_videotransform_value
Definition meta.h:184
spa_meta
A metadata element.
Definition meta.h:58
spa_meta::size
uint32_t size
size of metadata
Definition meta.h:60
spa_meta::type
uint32_t type
metadata type, one of enum spa_meta_type
Definition meta.h:59
spa_meta::data
void * data
pointer to metadata
Definition meta.h:61
spa_pod_sequence
a sequence of timed controls
Definition pod.h:248
spa_point
Definition defs.h:123
spa_rectangle
Definition defs.h:116
spa_rectangle::width
uint32_t width
Definition defs.h:117
spa_rectangle::height
uint32_t height
Definition defs.h:118
spa_region
Definition defs.h:130
spa_region::size
struct spa_rectangle size
Definition defs.h:132