Allocating buffer memory and sending fds to the server.
#include "config.h"
#include <stdio.h>
#include <errno.h>
#include <signal.h>
#include <math.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <spa/param/video/format-utils.h>
#define BPP 3
#define CURSOR_WIDTH 64
#define CURSOR_HEIGHT 64
#define CURSOR_BPP 4
#define MAX_BUFFERS 64
#define M_PI_M2 ( M_PI + M_PI )
struct data {
int32_t stride;
int counter;
uint32_t seq;
double crop;
double accumulator;
};
static void draw_elipse(uint32_t *dst, int width, int height, uint32_t color)
{
int i, j, r1, r2, r12, r22, r122;
r1 = width/2;
r12 = r1 * r1;
r2 = height/2;
r22 = r2 * r2;
r122 = r12 * r22;
for (i = -r2; i < r2; i++) {
for (j = -r1; j < r1; j++) {
dst[(i + r2)*width+(j+r1)] =
(i * i * r12 + j * j * r22 <= r122) ? color : 0x00000000;
}
}
}
static void on_process(void *userdata)
{
struct data *data = userdata;
uint32_t i, j;
uint8_t *p;
return;
}
return;
#if 0
struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
#else
#endif
}
r++;
}
}
data->crop = (sin(data->accumulator) + 1.0) * 32.0;
}
uint32_t *bitmap, color;
mcs->
position.
x = (sin(data->accumulator) + 1.0) * 160.0 + 80;
mcs->
position.
y = (cos(data->accumulator) + 1.0) * 100.0 + 50;
mb->
stride = CURSOR_WIDTH * CURSOR_BPP;
color = (cos(data->accumulator) + 1.0) * (1 << 23);
color |= 0xff000000;
}
for (i = 0; i < data->format.size.height; i++) {
for (j = 0; j < data->format.size.width * BPP; j++) {
p[j] = data->counter + j * i;
}
p += data->stride;
data->counter += 13;
}
data->accumulator += M_PI_M2 / 50.0;
if (data->accumulator >= M_PI_M2)
data->accumulator -= M_PI_M2;
}
static void on_timeout(void *userdata, uint64_t expirations)
{
struct data *data = userdata;
}
const char *error)
{
struct data *data = _data;
switch (state) {
data->timer, NULL, NULL, false);
break;
{
struct timespec timeout, interval;
timeout.tv_sec = 0;
timeout.tv_nsec = 1;
interval.tv_sec = 0;
data->timer, &timeout, &interval, false);
break;
}
default:
break;
}
}
static void on_stream_add_buffer(
void *_data,
struct pw_buffer *buffer)
{
struct data *data = _data;
#ifdef HAVE_MEMFD_CREATE
unsigned int seals;
#endif
return;
}
#ifdef HAVE_MEMFD_CREATE
d[0].
fd = memfd_create(
"video-src-memfd", MFD_CLOEXEC | MFD_ALLOW_SEALING);
#else
#endif
return;
}
return;
}
#ifdef HAVE_MEMFD_CREATE
seals = F_SEAL_GROW | F_SEAL_SHRINK | F_SEAL_SEAL;
if (fcntl(d[0].
fd, F_ADD_SEALS, seals) == -1) {
}
#endif
d[0].
data = mmap(NULL, d[0].
maxsize, PROT_READ|PROT_WRITE,
if (d[0].
data == MAP_FAILED) {
return;
}
}
static void on_stream_remove_buffer(
void *_data,
struct pw_buffer *buffer)
{
}
static void
on_stream_param_changed(
void *_data, uint32_t
id,
const struct spa_pod *param)
{
struct data *data = _data;
uint8_t params_buffer[1024];
return;
#define CURSOR_META_SIZE(w,h) (sizeof(struct spa_meta_cursor) + \
sizeof(struct spa_meta_bitmap) + w * h * CURSOR_BPP)
CURSOR_META_SIZE(CURSOR_WIDTH,CURSOR_HEIGHT)));
}
.process = on_process,
.state_changed = on_stream_state_changed,
.param_changed = on_stream_param_changed,
.add_buffer = on_stream_add_buffer,
.remove_buffer = on_stream_remove_buffer,
};
static void do_quit(void *userdata, int signal_number)
{
struct data *data = userdata;
}
int main(int argc, char *argv[])
{
struct data data = { 0, };
uint8_t buffer[1024];
"video-src-alloc",
NULL),
&stream_events,
params, 1);
return 0;
}
#define PW_ID_ANY
Definition core.h:66
#define PW_KEY_MEDIA_CLASS
class Ex: "Video/Source"
Definition keys.h:449
#define pw_log_trace(...)
Definition log.h:182
#define pw_log_warn(...)
Definition log.h:179
#define pw_log_error(...)
Definition log.h:178
#define pw_log_info(...)
Definition log.h:180
#define pw_loop_update_timer(l,...)
Definition loop.h:64
#define pw_loop_add_timer(l,...)
Definition loop.h:63
#define pw_loop_add_signal(l,...)
Definition loop.h:65
void pw_init(int *argc, char **argv[])
Initialize PipeWire.
Definition pipewire.c:489
void pw_deinit(void)
Deinitialize PipeWire.
Definition pipewire.c:601
#define PW_DIRECTION_OUTPUT
Definition port.h:50
struct pw_properties * pw_properties_new(const char *key,...)
Make a new properties object.
Definition properties.c:85
int pw_stream_connect(struct pw_stream *stream, enum pw_direction direction, uint32_t target_id, enum pw_stream_flags flags, const struct spa_pod **params, uint32_t n_params)
Connect a stream for input or output on port_path.
Definition stream.c:1906
struct pw_buffer * pw_stream_dequeue_buffer(struct pw_stream *stream)
Get a buffer that can be filled for playback streams or consumed for capture streams.
Definition stream.c:2422
uint32_t pw_stream_get_node_id(struct pw_stream *stream)
Get the node ID of the stream.
Definition stream.c:2175
bool pw_stream_is_driving(struct pw_stream *stream)
Check if the stream is driving.
Definition stream.c:2531
const char * pw_stream_state_as_string(enum pw_stream_state state)
Convert a stream state to a readable string.
Definition stream.c:1649
pw_stream_state
The state of a stream.
Definition stream.h:202
int pw_stream_update_params(struct pw_stream *stream, const struct spa_pod **params, uint32_t n_params)
Update the param exposed on the stream.
Definition stream.c:2215
int pw_stream_trigger_process(struct pw_stream *stream)
Trigger a push/pull on the stream.
Definition stream.c:2568
int pw_stream_queue_buffer(struct pw_stream *stream, struct pw_buffer *buffer)
Submit a buffer for playback or recycle a buffer for capture.
Definition stream.c:2450
struct pw_stream * pw_stream_new_simple(struct pw_loop *loop, const char *name, struct pw_properties *props, const struct pw_stream_events *events, void *data)
Definition stream.c:1605
#define PW_VERSION_STREAM_EVENTS
Definition stream.h:352
void pw_stream_destroy(struct pw_stream *stream)
Destroy a stream.
Definition stream.c:1699
@ PW_STREAM_FLAG_DRIVER
be a driver
Definition stream.h:404
@ PW_STREAM_FLAG_ALLOC_BUFFERS
the application will allocate buffer memory.
Definition stream.h:413
@ PW_STREAM_STATE_PAUSED
paused
Definition stream.h:206
@ PW_STREAM_STATE_STREAMING
streaming
Definition stream.h:207
void pw_thread_loop_unlock(struct pw_thread_loop *loop)
Unlock the loop.
Definition thread-loop.c:382
int pw_thread_loop_start(struct pw_thread_loop *loop)
Start the thread loop.
Definition thread-loop.c:317
struct pw_loop * pw_thread_loop_get_loop(struct pw_thread_loop *loop)
Get the loop implementation of the thread loop.
Definition thread-loop.c:278
void pw_thread_loop_destroy(struct pw_thread_loop *loop)
Destroy a thread loop.
Definition thread-loop.c:244
void pw_thread_loop_stop(struct pw_thread_loop *loop)
Stop the thread loop.
Definition thread-loop.c:350
void pw_thread_loop_lock(struct pw_thread_loop *loop)
Lock the loop.
Definition thread-loop.c:370
struct pw_thread_loop * pw_thread_loop_new(const char *name, const struct spa_dict *props)
Make a new thread loop with the given name and optional properties.
Definition thread-loop.c:215
void pw_thread_loop_wait(struct pw_thread_loop *loop)
Release the lock and wait until some thread calls pw_thread_loop_signal.
Definition thread-loop.c:422
void pw_thread_loop_signal(struct pw_thread_loop *loop, bool wait_for_accept)
Signal all threads waiting with pw_thread_loop_wait.
Definition thread-loop.c:398
#define SPA_DATA_FLAG_READWRITE
Definition buffer.h:80
#define spa_meta_first
Definition meta.h:56
static void * spa_buffer_find_meta_data(const struct spa_buffer *b, uint32_t type, size_t size)
Definition buffer.h:109
static struct spa_meta * spa_buffer_find_meta(const struct spa_buffer *b, uint32_t type)
Find metadata in a buffer.
Definition buffer.h:98
#define spa_meta_check(p, m)
Definition meta.h:61
@ SPA_META_VideoDamage
array of struct spa_meta_region with damage, where an invalid entry or end-of-array marks the end.
Definition meta.h:29
@ SPA_META_Cursor
struct spa_meta_cursor
Definition meta.h:31
@ SPA_META_VideoCrop
struct spa_meta_region with cropping data
Definition meta.h:28
@ SPA_META_Header
struct spa_meta_header
Definition meta.h:27
@ SPA_DATA_MemFd
generic fd, mmap to get to memory
Definition buffer.h:35
static int spa_format_video_raw_parse(const struct spa_pod *format, struct spa_video_info_raw *info)
Definition raw-utils.h:27
@ SPA_PARAM_META_size
the expected maximum size the meta (Int)
Definition buffers.h:39
@ SPA_PARAM_META_type
the metadata, one of enum spa_meta_type (Id enum spa_meta_type)
Definition buffers.h:38
@ SPA_MEDIA_TYPE_video
Definition format.h:28
@ SPA_PARAM_Format
configured format as SPA_TYPE_OBJECT_Format
Definition param.h:34
@ SPA_PARAM_Meta
allowed metadata for buffers as SPA_TYPE_OBJECT_ParamMeta
Definition param.h:36
@ SPA_PARAM_EnumFormat
available formats as SPA_TYPE_OBJECT_Format
Definition param.h:33
@ SPA_PARAM_Buffers
buffer configurations as SPA_TYPE_OBJECT_ParamBuffers
Definition param.h:35
@ SPA_FORMAT_VIDEO_framerate
frame rate (Fraction)
Definition format.h:124
@ SPA_FORMAT_mediaType
media type (Id enum spa_media_type)
Definition format.h:93
@ SPA_FORMAT_VIDEO_size
size (Rectangle)
Definition format.h:123
@ SPA_FORMAT_VIDEO_format
video format (Id enum spa_video_format)
Definition format.h:120
@ SPA_FORMAT_mediaSubtype
media subtype (Id enum spa_media_subtype)
Definition format.h:94
@ SPA_MEDIA_SUBTYPE_raw
Definition format.h:38
@ SPA_VIDEO_FORMAT_ARGB
Definition raw.h:58
@ SPA_VIDEO_FORMAT_RGB
Definition raw.h:60
@ SPA_PARAM_BUFFERS_dataType
possible memory types (Int, mask of enum spa_data_type)
Definition buffers.h:32
@ SPA_PARAM_BUFFERS_size
size of a data block memory (Int)
Definition buffers.h:29
@ SPA_PARAM_BUFFERS_stride
stride of data block memory (Int)
Definition buffers.h:30
@ SPA_PARAM_BUFFERS_blocks
number of data blocks per buffer (Int)
Definition buffers.h:28
@ SPA_PARAM_BUFFERS_buffers
number of buffers (Int)
Definition buffers.h:27
#define SPA_POD_Fraction(val)
Definition vararg.h:111
#define SPA_POD_CHOICE_RANGE_Int(def, min, max)
Definition vararg.h:58
#define SPA_POD_Id(val)
Definition vararg.h:49
#define SPA_POD_BUILDER_INIT(buffer, size)
Definition builder.h:62
#define SPA_POD_CHOICE_RANGE_Rectangle(def, min, max)
Definition vararg.h:106
#define spa_pod_builder_add_object(b, type, id,...)
Definition builder.h:659
#define SPA_POD_Int(val)
Definition vararg.h:54
#define SPA_POD_CHOICE_FLAGS_Int(flags)
Definition vararg.h:62
@ SPA_TYPE_OBJECT_ParamBuffers
Definition type.h:77
@ SPA_TYPE_OBJECT_ParamMeta
Definition type.h:78
@ SPA_TYPE_OBJECT_Format
Definition type.h:76
#define SPA_ROUND_UP_N(num, align)
Definition defs.h:332
#define SPA_FRACTION(num, denom)
Definition defs.h:136
#define SPA_NSEC_PER_MSEC
Definition defs.h:245
#define SPA_REGION(x, y, width, height)
Definition defs.h:129
#define SPA_TIMESPEC_TO_NSEC(ts)
Definition defs.h:256
#define SPA_PTROFF(ptr_, offset_, type_)
Return the address (buffer + offset) as pointer of type.
Definition defs.h:212
#define SPA_POINT(x, y)
Definition defs.h:122
#define SPA_RECTANGLE(width, height)
Definition defs.h:115
a buffer structure obtained from pw_stream_dequeue_buffer().
Definition stream.h:212
struct spa_buffer * buffer
the spa buffer
Definition stream.h:213
Events for a stream.
Definition stream.h:350
A Buffer.
Definition buffer.h:90
struct spa_data * datas
array of data members
Definition buffer.h:94
int32_t stride
stride of valid data
Definition buffer.h:49
uint32_t size
size of valid data.
Definition buffer.h:47
uint32_t offset
offset of valid data.
Definition buffer.h:44
Data for a buffer this stays constant for a buffer.
Definition buffer.h:62
struct spa_chunk * chunk
valid chunk of memory
Definition buffer.h:86
int64_t fd
optional fd for data
Definition buffer.h:82
uint32_t mapoffset
offset to map fd at
Definition buffer.h:83
uint32_t flags
data flags
Definition buffer.h:81
void * data
optional data pointer
Definition buffer.h:85
uint32_t maxsize
max size of data
Definition buffer.h:84
uint32_t type
memory type, one of enum spa_data_type, when allocating memory, the type contains a bitmask of allowe...
Definition buffer.h:63
A hook, contains the structure with functions and the data passed to the functions.
Definition hook.h:350
void * data
Definition builder.h:54
int32_t y
Definition defs.h:125
int32_t x
Definition defs.h:124
uint32_t width
Definition defs.h:117
uint32_t height
Definition defs.h:118
struct spa_point position
Definition defs.h:131
struct spa_rectangle size
Definition defs.h:132