PipeWire 1.2.0
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io.h
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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 {
75struct spa_io_buffers {
76#define SPA_STATUS_OK 0
77#define SPA_STATUS_NEED_DATA (1<<0)
78#define SPA_STATUS_HAVE_DATA (1<<1)
79#define SPA_STATUS_STOPPED (1<<2)
80#define SPA_STATUS_DRAINED (1<<3)
81 int32_t status;
82 uint32_t buffer_id;
83};
85#define SPA_IO_BUFFERS_INIT ((struct spa_io_buffers) { SPA_STATUS_OK, SPA_ID_INVALID, })
91 int32_t status;
92 uint32_t size;
93 void *data;
94};
95#define SPA_IO_MEMORY_INIT ((struct spa_io_memory) { SPA_STATUS_OK, 0, NULL, })
98struct spa_io_range {
99 uint64_t offset;
100 uint32_t min_size;
101 uint32_t max_size;
127struct spa_io_clock {
128#define SPA_IO_CLOCK_FLAG_FREEWHEEL (1u<<0)
129 uint32_t flags;
130 uint32_t id;
131 char name[64];
134 uint64_t nsec;
137 struct spa_fraction rate;
138 uint64_t position;
139 uint64_t duration;
140 int64_t delay;
141 double rate_diff;
143 uint64_t next_nsec;
149 uint64_t target_duration;
150 uint32_t target_seq;
152 uint32_t cycle;
153 uint64_t xrun;
155
156/* the size of the video in this cycle */
157struct spa_io_video_size {
158#define SPA_IO_VIDEO_SIZE_VALID (1<<0)
159 uint32_t flags;
160 uint32_t stride;
165 uint32_t padding[4];
167
175 uint64_t min;
176 uint64_t max;
177};
178
180struct spa_io_sequence {
182};
183
185struct spa_io_segment_bar {
186#define SPA_IO_SEGMENT_BAR_FLAG_VALID (1<<0)
187 uint32_t flags;
188 uint32_t offset;
191 double bpm;
192 double beat;
193 uint32_t padding[8];
198#define SPA_IO_SEGMENT_VIDEO_FLAG_VALID (1<<0)
199#define SPA_IO_SEGMENT_VIDEO_FLAG_DROP_FRAME (1<<1)
200#define SPA_IO_SEGMENT_VIDEO_FLAG_PULL_DOWN (1<<2)
201#define SPA_IO_SEGMENT_VIDEO_FLAG_INTERLACED (1<<3)
202 uint32_t flags;
203 uint32_t offset;
205 uint32_t hours;
206 uint32_t minutes;
207 uint32_t seconds;
208 uint32_t frames;
209 uint32_t field_count;
210 uint32_t padding[11];
211};
233struct spa_io_segment {
234 uint32_t version;
235#define SPA_IO_SEGMENT_FLAG_LOOPING (1<<0)
236#define SPA_IO_SEGMENT_FLAG_NO_POSITION (1<<1)
240 uint32_t flags;
241 uint64_t start;
245 uint64_t duration;
250 double rate;
252 uint64_t position;
256 struct spa_io_segment_bar bar;
258};
259
264};
265
267#define SPA_IO_POSITION_MAX_SEGMENTS 8
268
286struct spa_io_position {
287 struct spa_io_clock clock;
290 int64_t offset;
295 uint32_t state;
297 uint32_t n_segments;
299};
300
302struct spa_io_rate_match {
303 uint32_t delay;
304 uint32_t size;
305 double rate;
306#define SPA_IO_RATE_MATCH_FLAG_ACTIVE (1 << 0)
307 uint32_t flags;
308 uint32_t padding[7];
310
313 struct spa_io_buffers buffers[2];
315};
316
321#ifdef __cplusplus
322} /* extern "C" */
323#endif
325#endif /* SPA_IO_H */
spa/utils/defs.h
spa_io_position_state
Definition io.h:281
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:289
@ SPA_IO_POSITION_STATE_RUNNING
Definition io.h:284
@ SPA_IO_POSITION_STATE_STOPPED
Definition io.h:282
@ SPA_IO_POSITION_STATE_STARTING
Definition io.h:283
@ SPA_IO_AsyncBuffers
async area to exchange buffers, struct spa_io_async_buffers
Definition io.h:48
@ SPA_IO_Notify
area for notify messages, struct spa_io_sequence
Definition io.h:44
@ SPA_IO_Memory
memory pointer, struct spa_io_memory (currently not used in PipeWire)
Definition io.h:47
@ 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:43
@ SPA_IO_Latency
latency reporting, struct spa_io_latency (currently not used in PipeWire).
Definition io.h:41
@ SPA_IO_Range
expected byte range, struct spa_io_range (currently not used in PipeWire)
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:45
@ 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:46
spa/pod/pod.h
Definition defs.h:137
async buffers
Definition io.h:335
struct spa_io_buffers buffers[2]
async buffers, writers write to current (cycle+1)&1, readers read from (cycle)&1
Definition io.h:336
IO area to exchange buffers.
Definition io.h:80
int32_t status
the status code
Definition io.h:91
uint32_t buffer_id
a buffer id
Definition io.h:92
Absolute time reporting.
Definition io.h:139
struct spa_fraction target_rate
Target rate of next cycle.
Definition io.h:161
uint64_t next_nsec
Estimated next wakeup time in nanoseconds.
Definition io.h:156
uint64_t xrun
Estimated accumulated xrun duration.
Definition io.h:166
uint64_t position
Current position, in samples @ rate.
Definition io.h:151
uint32_t cycle
incremented each time the graph is started
Definition io.h:165
uint64_t nsec
Time in nanoseconds against monotonic clock (CLOCK_MONOTONIC).
Definition io.h:147
struct spa_fraction rate
Rate for position/duration/delay/xrun.
Definition io.h:150
double rate_diff
Rate difference between clock and monotonic time, as a ratio of clock speeds.
Definition io.h:154
uint32_t flags
Clock flags.
Definition io.h:142
uint32_t id
Unique clock id, set by host application.
Definition io.h:143
uint64_t target_duration
Target duration of next cycle.
Definition io.h:162
uint64_t duration
Duration of current cycle, in samples @ rate.
Definition io.h:152
int64_t delay
Delay between position and hardware, in samples @ rate.
Definition io.h:153
uint32_t target_seq
Seq counter.
Definition io.h:163
Latency reporting.
Definition io.h:187
uint64_t min
min latency
Definition io.h:189
uint64_t max
max latency
Definition io.h:190
struct spa_fraction rate
rate for min/max
Definition io.h:188
IO area to exchange a memory region.
Definition io.h:101
void * data
a memory pointer
Definition io.h:104
uint32_t size
the size of data
Definition io.h:103
The position information adds extra meaning to the raw clock times.
Definition io.h:308
struct spa_io_clock clock
clock position of driver, always valid and read only
Definition io.h:309
struct spa_io_video_size video
size of the video in the current cycle
Definition io.h:311
uint32_t state
one of enum spa_io_position_state
Definition io.h:317
uint32_t n_segments
number of segments
Definition io.h:319
struct spa_io_segment segments[SPA_IO_POSITION_MAX_SEGMENTS]
segments
Definition io.h:320
int64_t offset
an offset to subtract from the clock position to get a running time.
Definition io.h:312
A range, suitable for input ports that can suggest a range to output ports.
Definition io.h:110
uint64_t offset
offset in range
Definition io.h:111
uint32_t max_size
maximum size of data
Definition io.h:113
uint32_t min_size
minimum size of data
Definition io.h:112
rate matching
Definition io.h:324
uint32_t padding[7]
Definition io.h:331
uint32_t flags
extra flags
Definition io.h:330
double rate
rate for resampler
Definition io.h:327
uint32_t delay
extra delay in samples for resampler
Definition io.h:325
uint32_t size
requested input size for resampler
Definition io.h:326
bar and beat segment
Definition io.h:199
double beat
current beat in segment
Definition io.h:207
uint32_t padding[8]
Definition io.h:208
double bpm
beats per minute
Definition io.h:206
float signature_denom
time signature denominator
Definition io.h:205
uint32_t offset
offset in segment of this beat
Definition io.h:203
float signature_num
time signature numerator
Definition io.h:204
uint32_t flags
extra flags
Definition io.h:202
video frame segment
Definition io.h:212
uint32_t seconds
Definition io.h:226
struct spa_fraction framerate
Definition io.h:223
uint32_t field_count
0 for progressive, 1 and 2 for interlaced
Definition io.h:228
uint32_t hours
Definition io.h:224
uint32_t minutes
Definition io.h:225
uint32_t padding[11]
Definition io.h:229
uint32_t frames
Definition io.h:227
A segment converts a running time to a segment (stream) position.
Definition io.h:252
uint64_t duration
duration when this info becomes invalid expressed in running time.
Definition io.h:266
uint32_t flags
extra flags
Definition io.h:261
uint64_t position
The position when the running time == start.
Definition io.h:273
double rate
overall rate of the segment, can be negative for backwards time reporting.
Definition io.h:271
struct spa_io_segment_video video
Definition io.h:278
struct spa_io_segment_bar bar
Definition io.h:277
uint32_t version
Definition io.h:253
control stream, io area for SPA_IO_Control and SPA_IO_Notify
Definition io.h:194
struct spa_pod_sequence sequence
sequence of timed events
Definition io.h:195
Definition io.h:170
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:176
uint32_t padding[4]
Definition io.h:179
uint32_t stride
video stride in bytes
Definition io.h:174
uint32_t flags
optional flags
Definition io.h:173
struct spa_rectangle size
the video size
Definition io.h:175
a sequence of timed controls
Definition pod.h:248
Definition defs.h:116