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mp3-utils.h
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1/* Simple Plugin API */
2/* SPDX-FileCopyrightText: Copyright © 2023 Wim Taymans */
3/* SPDX-License-Identifier: MIT */
4
5#ifndef SPA_AUDIO_MP3_UTILS_H
6#define SPA_AUDIO_MP3_UTILS_H
7
8#include <spa/pod/parser.h>
9#include <spa/pod/builder.h>
10#include <spa/param/audio/format.h>
11#include <spa/param/format-utils.h>
12
13#ifdef __cplusplus
14 extern "C" {
15#endif
16
21
22#ifndef SPA_API_AUDIO_MP3_UTILS
23 #ifdef SPA_API_IMPL
24 #define SPA_API_AUDIO_MP3_UTILS SPA_API_IMPL
25 #else
26 #define SPA_API_AUDIO_MP3_UTILS static inline
27 #endif
28#endif
29
30 SPA_API_AUDIO_MP3_UTILS int
31 spa_format_audio_mp3_parse(const struct spa_pod *format, struct spa_audio_info_mp3 *info)
32{
33 int res;
34 res = spa_pod_parse_object(format,
35 SPA_TYPE_OBJECT_Format, NULL,
36 SPA_FORMAT_AUDIO_rate, SPA_POD_OPT_Int(&info->rate),
37 SPA_FORMAT_AUDIO_channels, SPA_POD_OPT_Int(&info->channels),
38 SPA_FORMAT_AUDIO_MP3_channelMode, SPA_POD_OPT_Id(&info->channel_mode));
39 return res;
40}
41
42 SPA_API_AUDIO_MP3_UTILS struct spa_pod *
43 spa_format_audio_mp3_build(struct spa_pod_builder *builder, uint32_t id,
44 const struct spa_audio_info_mp3 *info)
45{
46 struct spa_pod_frame f;
47 spa_pod_builder_push_object(builder, &f, SPA_TYPE_OBJECT_Format, id);
48 spa_pod_builder_add(builder,
49 SPA_FORMAT_mediaType, SPA_POD_Id(SPA_MEDIA_TYPE_audio),
50 SPA_FORMAT_mediaSubtype, SPA_POD_Id(SPA_MEDIA_SUBTYPE_mp3),
51 SPA_FORMAT_AUDIO_format, SPA_POD_Id(SPA_AUDIO_FORMAT_ENCODED),
52 0);
53 if (info->rate != 0)
54 spa_pod_builder_add(builder,
55 SPA_FORMAT_AUDIO_rate, SPA_POD_Int(info->rate), 0);
56 if (info->channels != 0)
57 spa_pod_builder_add(builder,
58 SPA_FORMAT_AUDIO_channels, SPA_POD_Int(info->channels), 0);
59 if (info->channel_mode != 0)
60 spa_pod_builder_add(builder,
61 SPA_FORMAT_AUDIO_MP3_channelMode, SPA_POD_Id(info->channel_mode), 0);
62 return (struct spa_pod*)spa_pod_builder_pop(builder, &f);
63}
64
68
69#ifdef __cplusplus
70} /* extern "C" */
71#endif
72
73#endif /* SPA_AUDIO_MP3_UTILS_H */
builder.h
spa/pod/builder.h
format-utils.h
res
uint32_t int int res
Definition core.h:433
spa_format_audio_mp3_parse
SPA_API_AUDIO_MP3_UTILS int spa_format_audio_mp3_parse(const struct spa_pod *format, struct spa_audio_info_mp3 *info)
Definition mp3-utils.h:38
spa_format_audio_mp3_build
SPA_API_AUDIO_MP3_UTILS struct spa_pod * spa_format_audio_mp3_build(struct spa_pod_builder *builder, uint32_t id, const struct spa_audio_info_mp3 *info)
Definition mp3-utils.h:50
SPA_API_AUDIO_MP3_UTILS
#define SPA_API_AUDIO_MP3_UTILS
Definition mp3-utils.h:33
SPA_MEDIA_TYPE_audio
@ SPA_MEDIA_TYPE_audio
Definition format.h:27
SPA_FORMAT_mediaType
@ SPA_FORMAT_mediaType
media type (Id enum spa_media_type)
Definition format.h:99
SPA_FORMAT_AUDIO_rate
@ SPA_FORMAT_AUDIO_rate
sample rate (Int)
Definition format.h:106
SPA_FORMAT_AUDIO_MP3_channelMode
@ SPA_FORMAT_AUDIO_MP3_channelMode
MP3 channel mode, (Id enum spa_audio_mp3_channel_mode).
Definition format.h:123
SPA_FORMAT_mediaSubtype
@ SPA_FORMAT_mediaSubtype
media subtype (Id enum spa_media_subtype)
Definition format.h:100
SPA_FORMAT_AUDIO_format
@ SPA_FORMAT_AUDIO_format
audio format, (Id enum spa_audio_format)
Definition format.h:104
SPA_FORMAT_AUDIO_channels
@ SPA_FORMAT_AUDIO_channels
number of audio channels (Int)
Definition format.h:107
SPA_MEDIA_SUBTYPE_mp3
@ SPA_MEDIA_SUBTYPE_mp3
Definition format.h:44
SPA_AUDIO_FORMAT_ENCODED
@ SPA_AUDIO_FORMAT_ENCODED
Definition raw.h:35
spa_pod_builder_pop
SPA_API_POD_BUILDER void * spa_pod_builder_pop(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
Definition builder.h:213
spa_pod_builder_add
SPA_API_POD_BUILDER int spa_pod_builder_add(struct spa_pod_builder *builder,...)
Definition builder.h:713
SPA_POD_Id
#define SPA_POD_Id(val)
Definition vararg.h:53
spa_pod_builder_push_object
SPA_API_POD_BUILDER 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:475
SPA_POD_OPT_Int
#define SPA_POD_OPT_Int(val)
Definition parser.h:866
SPA_POD_OPT_Id
#define SPA_POD_OPT_Id(val)
Definition parser.h:864
spa_pod_parse_object
#define spa_pod_parse_object(pod, type, id,...)
Definition parser.h:935
SPA_POD_Int
#define SPA_POD_Int(val)
Definition vararg.h:58
SPA_TYPE_OBJECT_Format
@ SPA_TYPE_OBJECT_Format
Definition type.h:87
format.h
spa/param/audio/format.h
parser.h
spa/pod/parser.h
spa_audio_info_mp3
Definition mp3.h:42
spa_pod_builder
Definition builder.h:63
spa_pod_frame
Definition body.h:38
spa_pod
Definition pod.h:57