PipeWire: mjpg-utils.h Source File

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mjpg-utils.h
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1/* Simple Plugin API
2 *
3 * Copyright © 2018 Wim Taymans
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 */
24
25#ifndef SPA_VIDEO_MJPG_UTILS_H
26#define SPA_VIDEO_MJPG_UTILS_H
27
28#ifdef __cplusplus
29extern "C" {
30#endif
31
37#include <spa/pod/parser.h>
38#include <spa/pod/builder.h>
39#include <spa/param/video/mjpg.h>
40
41static inline int
42 spa_format_video_mjpg_parse(const struct spa_pod *format,
43 struct spa_video_info_mjpg *info)
44{
45 return spa_pod_parse_object(format,
46 SPA_TYPE_OBJECT_Format, NULL,
47 SPA_FORMAT_VIDEO_size, SPA_POD_OPT_Rectangle(&info->size),
48 SPA_FORMAT_VIDEO_framerate, SPA_POD_OPT_Fraction(&info->framerate),
49 SPA_FORMAT_VIDEO_maxFramerate, SPA_POD_OPT_Fraction(&info->max_framerate));
50}
51
52static inline struct spa_pod *
53 spa_format_video_mjpg_build(struct spa_pod_builder *builder, uint32_t id,
54 struct spa_video_info_mjpg *info)
55{
56 struct spa_pod_frame f;
57 spa_pod_builder_push_object(builder, &f, SPA_TYPE_OBJECT_Format, id);
58 spa_pod_builder_add(builder,
59 SPA_FORMAT_mediaType, SPA_POD_Id(SPA_MEDIA_TYPE_video),
60 SPA_FORMAT_mediaSubtype, SPA_POD_Id(SPA_MEDIA_SUBTYPE_mjpg),
61 0);
62 if (info->size.width != 0 && info->size.height != 0)
63 spa_pod_builder_add(builder,
64 SPA_FORMAT_VIDEO_size, SPA_POD_Rectangle(&info->size), 0);
65 if (info->framerate.denom != 0)
66 spa_pod_builder_add(builder,
67 SPA_FORMAT_VIDEO_framerate, SPA_POD_Fraction(&info->framerate), 0);
68 if (info->max_framerate.denom != 0)
69 spa_pod_builder_add(builder,
70 SPA_FORMAT_VIDEO_maxFramerate, SPA_POD_Fraction(info->max_framerate), 0);
71 return (struct spa_pod*)spa_pod_builder_pop(builder, &f);
72}
73
78#ifdef __cplusplus
79} /* extern "C" */
80#endif
81
82#endif /* SPA_VIDEO_MJPG_UTILS_H */
builder.h
spa/pod/builder.h
spa_format_video_mjpg_build
static struct spa_pod * spa_format_video_mjpg_build(struct spa_pod_builder *builder, uint32_t id, struct spa_video_info_mjpg *info)
Definition: mjpg-utils.h:58
spa_format_video_mjpg_parse
static int spa_format_video_mjpg_parse(const struct spa_pod *format, struct spa_video_info_mjpg *info)
Definition: mjpg-utils.h:47
SPA_MEDIA_TYPE_video
@ SPA_MEDIA_TYPE_video
Definition: param/format.h:48
SPA_FORMAT_VIDEO_framerate
@ SPA_FORMAT_VIDEO_framerate
frame rate (Fraction)
Definition: param/format.h:143
SPA_FORMAT_mediaType
@ SPA_FORMAT_mediaType
media type (Id enum spa_media_type)
Definition: param/format.h:112
SPA_FORMAT_VIDEO_size
@ SPA_FORMAT_VIDEO_size
size (Rectangle)
Definition: param/format.h:142
SPA_FORMAT_VIDEO_maxFramerate
@ SPA_FORMAT_VIDEO_maxFramerate
maximum frame rate (Fraction)
Definition: param/format.h:144
SPA_FORMAT_mediaSubtype
@ SPA_FORMAT_mediaSubtype
media subtype (Id enum spa_media_subtype)
Definition: param/format.h:113
SPA_MEDIA_SUBTYPE_mjpg
@ SPA_MEDIA_SUBTYPE_mjpg
Definition: param/format.h:82
SPA_POD_Fraction
#define SPA_POD_Fraction(val)
Definition: vararg.h:131
SPA_POD_OPT_Rectangle
#define SPA_POD_OPT_Rectangle(val)
Definition: parser.h:556
spa_pod_builder_add
static int spa_pod_builder_add(struct spa_pod_builder *builder,...)
Definition: builder.h:667
SPA_POD_OPT_Fraction
#define SPA_POD_OPT_Fraction(val)
Definition: parser.h:558
SPA_POD_Id
#define SPA_POD_Id(val)
Definition: vararg.h:69
spa_pod_builder_pop
static void * spa_pod_builder_pop(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
Definition: builder.h:188
spa_pod_builder_push_object
static int spa_pod_builder_push_object(struct spa_pod_builder *builder, struct spa_pod_frame *frame, uint32_t type, uint32_t id)
Definition: builder.h:455
SPA_POD_Rectangle
#define SPA_POD_Rectangle(val)
Definition: vararg.h:122
spa_pod_parse_object
#define spa_pod_parse_object(pod, type, id,...)
Definition: parser.h:596
SPA_TYPE_OBJECT_Format
@ SPA_TYPE_OBJECT_Format
Definition: spa/include/spa/utils/type.h:96
mjpg.h
spa/param/video/mjpg.h
parser.h
spa/pod/parser.h
spa_fraction::denom
uint32_t denom
Definition: defs.h:141
spa_pod_builder
Definition: builder.h:73
spa_pod_frame
Definition: iter.h:47
spa_pod
Definition: pod/pod.h:63
spa_rectangle::width
uint32_t width
Definition: defs.h:119
spa_rectangle::height
uint32_t height
Definition: defs.h:120
spa_video_info_mjpg
Definition: mjpg.h:44
spa_video_info_mjpg::max_framerate
struct spa_fraction max_framerate
Definition: mjpg.h:47
spa_video_info_mjpg::framerate
struct spa_fraction framerate
Definition: mjpg.h:46
spa_video_info_mjpg::size
struct spa_rectangle size
Definition: mjpg.h:45