PipeWire: spa/param/audio/mp3-utils.h Source File

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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#ifdef __cplusplus
9extern "C" {
10#endif
11
17#include <spa/pod/parser.h>
18#include <spa/pod/builder.h>
19#include <spa/param/audio/format.h>
20#include <spa/param/format-utils.h>
21
22static inline int
23 spa_format_audio_mp3_parse(const struct spa_pod *format, struct spa_audio_info_mp3 *info)
24{
25 int res;
26 res = spa_pod_parse_object(format,
27 SPA_TYPE_OBJECT_Format, NULL,
28 SPA_FORMAT_AUDIO_rate, SPA_POD_OPT_Int(&info->rate),
29 SPA_FORMAT_AUDIO_channels, SPA_POD_OPT_Int(&info->channels));
30 return res;
31}
32
33static inline struct spa_pod *
34 spa_format_audio_mp3_build(struct spa_pod_builder *builder, uint32_t id, struct spa_audio_info_mp3 *info)
35{
36 struct spa_pod_frame f;
37 spa_pod_builder_push_object(builder, &f, SPA_TYPE_OBJECT_Format, id);
38 spa_pod_builder_add(builder,
39 SPA_FORMAT_mediaType, SPA_POD_Id(SPA_MEDIA_TYPE_audio),
40 SPA_FORMAT_mediaSubtype, SPA_POD_Id(SPA_MEDIA_SUBTYPE_mp3),
41 SPA_FORMAT_AUDIO_format, SPA_POD_Id(SPA_AUDIO_FORMAT_ENCODED),
42 0);
43 if (info->rate != 0)
44 spa_pod_builder_add(builder,
45 SPA_FORMAT_AUDIO_rate, SPA_POD_Int(info->rate), 0);
46 if (info->channels != 0)
47 spa_pod_builder_add(builder,
48 SPA_FORMAT_AUDIO_channels, SPA_POD_Int(info->channels), 0);
49 return (struct spa_pod*)spa_pod_builder_pop(builder, &f);
50}
51
56#ifdef __cplusplus
57} /* extern "C" */
58#endif
59
60#endif /* SPA_AUDIO_MP3_UTILS_H */
builder.h
spa/pod/builder.h
format-utils.h
spa_format_audio_mp3_parse
static int spa_format_audio_mp3_parse(const struct spa_pod *format, struct spa_audio_info_mp3 *info)
Definition mp3-utils.h:28
spa_format_audio_mp3_build
static struct spa_pod * spa_format_audio_mp3_build(struct spa_pod_builder *builder, uint32_t id, struct spa_audio_info_mp3 *info)
Definition mp3-utils.h:39
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:93
SPA_FORMAT_AUDIO_rate
@ SPA_FORMAT_AUDIO_rate
sample rate (Int)
Definition format.h:100
SPA_FORMAT_mediaSubtype
@ SPA_FORMAT_mediaSubtype
media subtype (Id enum spa_media_subtype)
Definition format.h:94
SPA_FORMAT_AUDIO_format
@ SPA_FORMAT_AUDIO_format
audio format, (Id enum spa_audio_format)
Definition format.h:98
SPA_FORMAT_AUDIO_channels
@ SPA_FORMAT_AUDIO_channels
number of audio channels (Int)
Definition format.h:101
SPA_MEDIA_SUBTYPE_mp3
@ SPA_MEDIA_SUBTYPE_mp3
Definition format.h:44
SPA_AUDIO_FORMAT_ENCODED
@ SPA_AUDIO_FORMAT_ENCODED
Definition raw.h:33
spa_pod_builder_add
static int spa_pod_builder_add(struct spa_pod_builder *builder,...)
Definition builder.h:647
SPA_POD_Id
#define SPA_POD_Id(val)
Definition vararg.h:49
spa_pod_builder_pop
static void * spa_pod_builder_pop(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
Definition builder.h:168
SPA_POD_OPT_Int
#define SPA_POD_OPT_Int(val)
Definition parser.h:522
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:435
spa_pod_parse_object
#define spa_pod_parse_object(pod, type, id,...)
Definition parser.h:576
SPA_POD_Int
#define SPA_POD_Int(val)
Definition vararg.h:54
SPA_TYPE_OBJECT_Format
@ SPA_TYPE_OBJECT_Format
Definition type.h:76
format.h
spa/param/audio/format.h
parser.h
spa/pod/parser.h
spa_audio_info_mp3
Definition mp3.h:26
spa_pod_builder
Definition builder.h:53
spa_pod_frame
Definition iter.h:27
spa_pod
Definition pod.h:43
spa_pod::type
uint32_t type
Definition pod.h:45