PipeWire 1.3.0
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latency-utils.h
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1/* Simple Plugin API */
2/* SPDX-FileCopyrightText: Copyright © 2021 Wim Taymans */
3/* SPDX-License-Identifier: MIT */
4
5#ifndef SPA_PARAM_LATENCY_UTILS_H
6#define SPA_PARAM_LATENCY_UTILS_H
7
8#ifdef __cplusplus
9extern "C" {
10#endif
11
17#include <float.h>
18
19#include <spa/pod/builder.h>
20#include <spa/pod/parser.h>
21#include <spa/param/latency.h>
22
23static inline int
24spa_latency_info_compare(const struct spa_latency_info *a, const struct spa_latency_info *b)
25{
26 if (a->min_quantum == b->min_quantum &&
27 a->max_quantum == b->max_quantum &&
28 a->min_rate == b->min_rate &&
29 a->max_rate == b->max_rate &&
30 a->min_ns == b->min_ns &&
31 a->max_ns == b->max_ns)
32 return 0;
33 return 1;
34}
35
36static inline void
38{
39 *info = SPA_LATENCY_INFO(direction,
40 .min_quantum = FLT_MAX,
41 .max_quantum = FLT_MIN,
42 .min_rate = INT32_MAX,
43 .max_rate = INT32_MIN,
44 .min_ns = INT64_MAX,
45 .max_ns = INT64_MIN);
46}
47static inline void
49{
50 if (info->min_quantum == FLT_MAX)
51 info->min_quantum = 0;
52 if (info->max_quantum == FLT_MIN)
53 info->max_quantum = 0;
54 if (info->min_rate == INT32_MAX)
55 info->min_rate = 0;
56 if (info->max_rate == INT32_MIN)
57 info->max_rate = 0;
58 if (info->min_ns == INT64_MAX)
59 info->min_ns = 0;
60 if (info->max_ns == INT64_MIN)
61 info->max_ns = 0;
62}
63
64static inline int
65spa_latency_info_combine(struct spa_latency_info *info, const struct spa_latency_info *other)
66{
67 if (info->direction != other->direction)
68 return -EINVAL;
69 if (other->min_quantum < info->min_quantum)
70 info->min_quantum = other->min_quantum;
71 if (other->max_quantum > info->max_quantum)
72 info->max_quantum = other->max_quantum;
73 if (other->min_rate < info->min_rate)
74 info->min_rate = other->min_rate;
75 if (other->max_rate > info->max_rate)
76 info->max_rate = other->max_rate;
77 if (other->min_ns < info->min_ns)
78 info->min_ns = other->min_ns;
79 if (other->max_ns > info->max_ns)
80 info->max_ns = other->max_ns;
81 return 0;
82}
83
84static inline int
85spa_latency_parse(const struct spa_pod *latency, struct spa_latency_info *info)
86{
87 int res;
88 spa_zero(*info);
89 if ((res = spa_pod_parse_object(latency,
91 SPA_PARAM_LATENCY_direction, SPA_POD_Id(&info->direction),
97 SPA_PARAM_LATENCY_maxNs, SPA_POD_OPT_Long(&info->max_ns))) < 0)
98 return res;
99 info->direction = (enum spa_direction)(info->direction & 1);
100 return 0;
101}
102
103static inline struct spa_pod *
104spa_latency_build(struct spa_pod_builder *builder, uint32_t id, const struct spa_latency_info *info)
105{
106 return (struct spa_pod *)spa_pod_builder_add_object(builder,
108 SPA_PARAM_LATENCY_direction, SPA_POD_Id(info->direction),
111 SPA_PARAM_LATENCY_minRate, SPA_POD_Int(info->min_rate),
112 SPA_PARAM_LATENCY_maxRate, SPA_POD_Int(info->max_rate),
115}
116
117static inline int
118spa_process_latency_parse(const struct spa_pod *latency, struct spa_process_latency_info *info)
119{
120 int res;
121 spa_zero(*info);
122 if ((res = spa_pod_parse_object(latency,
127 return res;
128 return 0;
129}
130
131static inline struct spa_pod *
132spa_process_latency_build(struct spa_pod_builder *builder, uint32_t id,
133 const struct spa_process_latency_info *info)
134{
135 return (struct spa_pod *)spa_pod_builder_add_object(builder,
140}
141
142static inline int
144 struct spa_latency_info *info)
145{
146 info->min_quantum += process->quantum;
147 info->max_quantum += process->quantum;
148 info->min_rate += process->rate;
149 info->max_rate += process->rate;
150 info->min_ns += process->ns;
151 info->max_ns += process->ns;
152 return 0;
153}
154
155static inline int
157 const struct spa_process_latency_info *b)
158{
159 if (a->quantum == b->quantum &&
160 a->rate == b->rate &&
161 a->ns == b->ns)
162 return 0;
163 return 1;
164}
165
170#ifdef __cplusplus
171} /* extern "C" */
172#endif
173
174#endif /* SPA_PARAM_LATENCY_UTILS_H */
spa/pod/builder.h
static int spa_latency_parse(const struct spa_pod *latency, struct spa_latency_info *info)
Definition latency-utils.h:90
static int spa_process_latency_info_compare(const struct spa_process_latency_info *a, const struct spa_process_latency_info *b)
Definition latency-utils.h:161
static struct spa_pod * spa_process_latency_build(struct spa_pod_builder *builder, uint32_t id, const struct spa_process_latency_info *info)
Definition latency-utils.h:137
static int spa_latency_info_combine(struct spa_latency_info *info, const struct spa_latency_info *other)
Definition latency-utils.h:70
static struct spa_pod * spa_latency_build(struct spa_pod_builder *builder, uint32_t id, const struct spa_latency_info *info)
Definition latency-utils.h:109
#define SPA_LATENCY_INFO(dir,...)
Definition latency.h:65
static int spa_process_latency_info_add(const struct spa_process_latency_info *process, struct spa_latency_info *info)
Definition latency-utils.h:148
static int spa_process_latency_parse(const struct spa_pod *latency, struct spa_process_latency_info *info)
Definition latency-utils.h:123
static void spa_latency_info_combine_finish(struct spa_latency_info *info)
Definition latency-utils.h:53
static int spa_latency_info_compare(const struct spa_latency_info *a, const struct spa_latency_info *b)
Definition latency-utils.h:29
static void spa_latency_info_combine_start(struct spa_latency_info *info, enum spa_direction direction)
Definition latency-utils.h:42
@ SPA_PARAM_PROCESS_LATENCY_rate
latency (Int) relative to graph rate
Definition latency.h:76
@ SPA_PARAM_PROCESS_LATENCY_ns
latency (Long) in nanoseconds
Definition latency.h:77
@ SPA_PARAM_PROCESS_LATENCY_quantum
latency relative to quantum (Float)
Definition latency.h:75
@ SPA_PARAM_LATENCY_maxNs
max latency (Long) in nanoseconds
Definition latency.h:50
@ SPA_PARAM_LATENCY_minRate
min latency (Int) relative to graph rate
Definition latency.h:47
@ SPA_PARAM_LATENCY_minQuantum
min latency relative to quantum (Float)
Definition latency.h:45
@ SPA_PARAM_LATENCY_maxRate
max latency (Int) relative to graph rate
Definition latency.h:48
@ SPA_PARAM_LATENCY_maxQuantum
max latency relative to quantum (Float)
Definition latency.h:46
@ SPA_PARAM_LATENCY_direction
direction, input/output (Id enum spa_direction)
Definition latency.h:44
@ SPA_PARAM_LATENCY_minNs
min latency (Long) in nanoseconds
Definition latency.h:49
#define SPA_POD_OPT_Float(val)
Definition parser.h:526
#define SPA_POD_Long(val)
Definition vararg.h:65
#define SPA_POD_Id(val)
Definition vararg.h:49
#define SPA_POD_OPT_Int(val)
Definition parser.h:522
#define spa_pod_builder_add_object(b, type, id,...)
Definition builder.h:659
#define SPA_POD_Float(val)
Definition vararg.h:76
#define spa_pod_parse_object(pod, type, id,...)
Definition parser.h:576
#define SPA_POD_Int(val)
Definition vararg.h:54
#define SPA_POD_OPT_Long(val)
Definition parser.h:524
@ SPA_TYPE_OBJECT_ParamLatency
Definition type.h:85
@ SPA_TYPE_OBJECT_ParamProcessLatency
Definition type.h:86
#define spa_zero(x)
Definition defs.h:483
spa_direction
Definition defs.h:106
spa/param/latency.h
spa/pod/parser.h
helper structure for managing latency objects
Definition latency.h:54
int32_t min_rate
Definition latency.h:58
int64_t min_ns
Definition latency.h:60
int32_t max_rate
Definition latency.h:59
enum spa_direction direction
Definition latency.h:55
float max_quantum
Definition latency.h:57
float min_quantum
Definition latency.h:56
int64_t max_ns
Definition latency.h:61
Definition builder.h:53
Definition pod.h:43
Helper structure for managing process latency objects.
Definition latency.h:81
int64_t ns
Definition latency.h:84
float quantum
Definition latency.h:82
int32_t rate
Definition latency.h:83