PipeWire 0.3.77
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io.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_IO_H
6#define SPA_IO_H
7
8#ifdef __cplusplus
9extern "C" {
10#endif
11
17#include <spa/utils/defs.h>
18#include <spa/pod/pod.h>
19
31enum spa_io_type {
42};
73struct spa_io_buffers {
74#define SPA_STATUS_OK 0
75#define SPA_STATUS_NEED_DATA (1<<0)
76#define SPA_STATUS_HAVE_DATA (1<<1)
77#define SPA_STATUS_STOPPED (1<<2)
78#define SPA_STATUS_DRAINED (1<<3)
79 int32_t status;
80 uint32_t buffer_id;
81};
83#define SPA_IO_BUFFERS_INIT ((struct spa_io_buffers) { SPA_STATUS_OK, SPA_ID_INVALID, })
89 int32_t status;
90 uint32_t size;
91 void *data;
92};
93#define SPA_IO_MEMORY_INIT ((struct spa_io_memory) { SPA_STATUS_OK, 0, NULL, })
96struct spa_io_range {
97 uint64_t offset;
98 uint32_t min_size;
99 uint32_t max_size;
112struct spa_io_clock {
113#define SPA_IO_CLOCK_FLAG_FREEWHEEL (1u<<0)
114 uint32_t flags;
115 uint32_t id;
116 char name[64];
119 uint64_t nsec;
120 struct spa_fraction rate;
121 uint64_t position;
122 uint64_t duration;
123 int64_t delay;
125 double rate_diff;
126 uint64_t next_nsec;
129 uint64_t target_duration;
130 uint32_t target_seq;
133 uint32_t padding[3];
136/* the size of the video in this cycle */
137struct spa_io_video_size {
138#define SPA_IO_VIDEO_SIZE_VALID (1<<0)
139 uint32_t flags;
140 uint32_t stride;
145 uint32_t padding[4];
147
149struct spa_io_latency {
151 uint64_t min;
152 uint64_t max;
158};
161struct spa_io_segment_bar {
162#define SPA_IO_SEGMENT_BAR_FLAG_VALID (1<<0)
163 uint32_t flags;
164 uint32_t offset;
167 double bpm;
168 double beat;
169 uint32_t padding[8];
174#define SPA_IO_SEGMENT_VIDEO_FLAG_VALID (1<<0)
175#define SPA_IO_SEGMENT_VIDEO_FLAG_DROP_FRAME (1<<1)
176#define SPA_IO_SEGMENT_VIDEO_FLAG_PULL_DOWN (1<<2)
177#define SPA_IO_SEGMENT_VIDEO_FLAG_INTERLACED (1<<3)
178 uint32_t flags;
179 uint32_t offset;
181 uint32_t hours;
182 uint32_t minutes;
183 uint32_t seconds;
184 uint32_t frames;
185 uint32_t field_count;
186 uint32_t padding[11];
187};
209struct spa_io_segment {
210 uint32_t version;
211#define SPA_IO_SEGMENT_FLAG_LOOPING (1<<0)
212#define SPA_IO_SEGMENT_FLAG_NO_POSITION (1<<1)
216 uint32_t flags;
217 uint64_t start;
221 uint64_t duration;
226 double rate;
228 uint64_t position;
232 struct spa_io_segment_bar bar;
234};
235
240};
241
243#define SPA_IO_POSITION_MAX_SEGMENTS 8
244
261 int64_t offset;
266 uint32_t state;
268 uint32_t n_segments;
270};
271
273struct spa_io_rate_match {
274 uint32_t delay;
275 uint32_t size;
276 double rate;
277#define SPA_IO_RATE_MATCH_FLAG_ACTIVE (1 << 0)
278 uint32_t flags;
279 uint32_t padding[7];
281
286#ifdef __cplusplus
287} /* extern "C" */
288#endif
289
290#endif /* SPA_IO_H */
spa/utils/defs.h
spa_io_position_state
Definition: io.h:257
spa_io_type
IO areas.
Definition: io.h:36
#define SPA_IO_POSITION_MAX_SEGMENTS
the maximum number of segments visible in the future
Definition: io.h:265
@ SPA_IO_POSITION_STATE_RUNNING
Definition: io.h:260
@ SPA_IO_POSITION_STATE_STOPPED
Definition: io.h:258
@ SPA_IO_POSITION_STATE_STARTING
Definition: io.h:259
@ SPA_IO_Notify
area for notify messages, struct spa_io_sequence
Definition: io.h:43
@ SPA_IO_Memory
memory pointer, struct spa_io_memory
Definition: io.h:46
@ SPA_IO_Clock
area to update clock information, struct spa_io_clock
Definition: io.h:40
@ SPA_IO_Control
area for control messages, struct spa_io_sequence
Definition: io.h:42
@ SPA_IO_Latency
latency reporting, struct spa_io_latency
Definition: io.h:41
@ SPA_IO_Range
expected byte range, struct spa_io_range
Definition: io.h:39
@ SPA_IO_Invalid
Definition: io.h:37
@ SPA_IO_Position
position information in the graph, struct spa_io_position
Definition: io.h:44
@ SPA_IO_Buffers
area to exchange buffers, struct spa_io_buffers
Definition: io.h:38
@ SPA_IO_RateMatch
rate matching between nodes, struct spa_io_rate_match
Definition: io.h:45
spa/pod/pod.h
Definition: defs.h:123
IO area to exchange buffers.
Definition: io.h:78
int32_t status
the status code
Definition: io.h:89
uint32_t buffer_id
a buffer id
Definition: io.h:90
Absolute time reporting.
Definition: io.h:124
struct spa_fraction target_rate
target rate of next cycle
Definition: io.h:141
uint64_t next_nsec
estimated next wakeup time in nanoseconds
Definition: io.h:139
uint64_t position
current position
Definition: io.h:134
uint64_t nsec
time in nanoseconds against monotonic clock
Definition: io.h:132
struct spa_fraction rate
rate for position/duration/delay
Definition: io.h:133
double rate_diff
rate difference between clock and monotonic time
Definition: io.h:138
uint32_t flags
clock flags
Definition: io.h:127
uint32_t id
unique clock id, set by application
Definition: io.h:128
uint64_t target_duration
target duration of next cycle
Definition: io.h:142
uint32_t padding[3]
Definition: io.h:146
uint64_t duration
duration of current cycle
Definition: io.h:135
int64_t delay
delay between position and hardware, positive for capture, negative for playback
Definition: io.h:136
uint32_t target_seq
seq counter.
Definition: io.h:143
latency reporting
Definition: io.h:163
uint64_t min
min latency
Definition: io.h:165
uint64_t max
max latency
Definition: io.h:166
struct spa_fraction rate
rate for min/max
Definition: io.h:164
IO area to exchange a memory region.
Definition: io.h:99
void * data
a memory pointer
Definition: io.h:102
uint32_t size
the size of data
Definition: io.h:101
The position information adds extra meaning to the raw clock times.
Definition: io.h:279
struct spa_io_clock clock
clock position of driver, always valid and read only
Definition: io.h:280
struct spa_io_video_size video
size of the video in the current cycle
Definition: io.h:282
uint32_t state
one of enum spa_io_position_state
Definition: io.h:288
uint32_t n_segments
number of segments
Definition: io.h:290
struct spa_io_segment segments[SPA_IO_POSITION_MAX_SEGMENTS]
segments
Definition: io.h:291
int64_t offset
an offset to subtract from the clock position to get a running time.
Definition: io.h:283
A range, suitable for input ports that can suggest a range to output ports.
Definition: io.h:108
uint64_t offset
offset in range
Definition: io.h:109
uint32_t max_size
maximum size of data
Definition: io.h:111
uint32_t min_size
minimum size of data
Definition: io.h:110
rate matching
Definition: io.h:295
uint32_t padding[7]
Definition: io.h:302
uint32_t flags
extra flags
Definition: io.h:301
double rate
rate for resampler
Definition: io.h:298
uint32_t delay
extra delay in samples for resampler
Definition: io.h:296
uint32_t size
requested input size for resampler
Definition: io.h:297
bar and beat segment
Definition: io.h:175
double beat
current beat in segment
Definition: io.h:183
uint32_t padding[8]
Definition: io.h:184
double bpm
beats per minute
Definition: io.h:182
float signature_denom
time signature denominator
Definition: io.h:181
uint32_t offset
offset in segment of this beat
Definition: io.h:179
float signature_num
time signature numerator
Definition: io.h:180
uint32_t flags
extra flags
Definition: io.h:178
video frame segment
Definition: io.h:188
uint32_t seconds
Definition: io.h:202
struct spa_fraction framerate
Definition: io.h:199
uint32_t field_count
0 for progressive, 1 and 2 for interlaced
Definition: io.h:204
uint32_t hours
Definition: io.h:200
uint32_t minutes
Definition: io.h:201
uint32_t padding[11]
Definition: io.h:205
uint32_t frames
Definition: io.h:203
A segment converts a running time to a segment (stream) position.
Definition: io.h:228
uint64_t duration
duration when this info becomes invalid expressed in running time.
Definition: io.h:242
uint32_t flags
extra flags
Definition: io.h:237
uint64_t position
The position when the running time == start.
Definition: io.h:249
double rate
overall rate of the segment, can be negative for backwards time reporting.
Definition: io.h:247
struct spa_io_segment_video video
Definition: io.h:254
struct spa_io_segment_bar bar
Definition: io.h:253
uint32_t version
Definition: io.h:229
control stream, io area for SPA_IO_Control and SPA_IO_Notify
Definition: io.h:170
struct spa_pod_sequence sequence
sequence of timed events
Definition: io.h:171
Definition: io.h:150
struct spa_fraction framerate
the minimum framerate, the cycle duration is always smaller to ensure there is only one video frame p...
Definition: io.h:156
uint32_t padding[4]
Definition: io.h:159
uint32_t stride
video stride in bytes
Definition: io.h:154
uint32_t flags
optional flags
Definition: io.h:153
struct spa_rectangle size
the video size
Definition: io.h:155
a sequence of timed controls
Definition: pod/pod.h:248
Definition: defs.h:102