PipeWire 1.6.8

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spa/examples/example-control.c

/* Spa */
/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
/* SPDX-License-Identifier: MIT */
/*
[title]
[title]
*/
#include "config.h"
#include <math.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <dlfcn.h>
#include <errno.h>
#include <pthread.h>
#include <poll.h>
#include <spa/support/plugin.h>
#include <spa/support/log-impl.h>
#include <spa/support/loop.h>
#include <spa/node/node.h>
#include <spa/node/io.h>
#include <spa/node/utils.h>
#include <spa/param/param.h>
#include <spa/param/props.h>
#include <spa/param/audio/format-utils.h>
#include <spa/utils/names.h>
#include <spa/utils/result.h>
#include <spa/utils/string.h>
#define M_PI_M2 ( M_PI + M_PI )
static SPA_LOG_IMPL(default_log);
#define spa_debug(f,...) spa_log_trace(&default_log.log, f, __VA_ARGS__)
#include <spa/graph/graph.h>
#include <spa/debug/pod.h>
struct buffer {
struct spa_buffer buffer;
struct spa_meta metas[1];
struct spa_meta_header header;
struct spa_data datas[1];
struct spa_chunk chunks[1];
};
struct data {
const char *plugin_dir;
struct spa_log *log;
struct spa_system *system;
struct spa_loop *loop;
struct spa_loop_control *control;
struct spa_support support[5];
uint32_t n_support;
struct spa_graph graph;
struct spa_graph_state graph_state;
struct spa_graph_node source_node;
struct spa_graph_state source_state;
struct spa_graph_port source_out;
struct spa_graph_port sink_in;
struct spa_graph_node sink_node;
struct spa_graph_state sink_state;
struct spa_node *sink;
struct spa_node *source;
struct spa_io_buffers source_sink_io[1];
struct spa_buffer *source_buffers[1];
struct buffer source_buffer[1];
uint8_t ctrl[1024];
double freq_accum;
double volume_accum;
bool running;
pthread_t thread;
};
#define MIN_LATENCY 1024
#define BUFFER_SIZE 4096
static void
init_buffer(struct data *data, struct spa_buffer **bufs, struct buffer *ba, int n_buffers,
size_t size)
{
int i;
for (i = 0; i < n_buffers; i++) {
struct buffer *b = &ba[i];
bufs[i] = &b->buffer;
b->buffer.metas = b->metas;
b->buffer.n_metas = 1;
b->buffer.datas = b->datas;
b->buffer.n_datas = 1;
b->header.flags = 0;
b->header.seq = 0;
b->header.pts = 0;
b->header.dts_offset = 0;
b->metas[0].type = SPA_META_Header;
b->metas[0].data = &b->header;
b->metas[0].size = sizeof(b->header);
b->datas[0].type = SPA_DATA_MemPtr;
b->datas[0].flags = 0;
b->datas[0].fd = -1;
b->datas[0].mapoffset = 0;
b->datas[0].maxsize = size;
b->datas[0].data = malloc(size);
b->datas[0].chunk = &b->chunks[0];
b->datas[0].chunk->offset = 0;
b->datas[0].chunk->size = 0;
b->datas[0].chunk->stride = 0;
}
}
static int make_node(struct data *data, struct spa_node **node, const char *lib, const char *name)
{
struct spa_handle *handle;
int res;
void *hnd;
spa_handle_factory_enum_func_t enum_func;
uint32_t i;
char *path;
if ((path = spa_aprintf("%s/%s", data->plugin_dir, lib)) == NULL) {
return -ENOMEM;
}
if ((hnd = dlopen(path, RTLD_NOW)) == NULL) {
printf("can't load %s: %s\n", lib, dlerror());
free(path);
return -ENOENT;
}
free(path);
if ((enum_func = dlsym(hnd, SPA_HANDLE_FACTORY_ENUM_FUNC_NAME)) == NULL) {
printf("can't find enum function\n");
return -ENOENT;
}
for (i = 0;;) {
const struct spa_handle_factory *factory;
void *iface;
if ((res = enum_func(&factory, &i)) <= 0) {
if (res != 0)
printf("can't enumerate factories: %s\n", spa_strerror(res));
break;
}
if (factory->version < 1)
continue;
if (!spa_streq(factory->name, name))
continue;
handle = calloc(1, spa_handle_factory_get_size(factory, NULL));
if ((res =
spa_handle_factory_init(factory, handle, NULL, data->support,
data->n_support)) < 0) {
printf("can't make factory instance: %d\n", res);
return res;
}
if ((res = spa_handle_get_interface(handle, SPA_TYPE_INTERFACE_Node, &iface)) < 0) {
printf("can't get interface %d\n", res);
return res;
}
*node = iface;
return 0;
}
return -EBADF;
}
static void update_props(struct data *data)
{
struct spa_pod_builder b;
struct spa_pod *pod;
struct spa_pod_frame f[2];
spa_pod_builder_init(&b, data->ctrl, sizeof(data->ctrl));
#if 0
spa_pod_builder_push_sequence(&b, &f[0], 0);
spa_pod_builder_control(&b, 0, SPA_CONTROL_Properties);
spa_pod_builder_push_object(&b, &f[1], SPA_TYPE_OBJECT_Props, 0);
spa_pod_builder_prop(&b, SPA_PROP_frequency, 0);
spa_pod_builder_float(&b, ((sin(data->freq_accum) + 1.0) * 200.0) + 440.0);
spa_pod_builder_prop(&b, SPA_PROP_volume, 0);
spa_pod_builder_float(&b, (sin(data->volume_accum) / 2.0) + 0.5);
spa_pod_builder_pop(&b, &f[1]);
pod = spa_pod_builder_pop(&b, &f[0]);
#else
spa_pod_builder_push_sequence(&b, &f[0], 0);
spa_pod_builder_control(&b, 0, SPA_CONTROL_Properties);
spa_pod_builder_add_object(&b,
SPA_TYPE_OBJECT_Props, 0,
SPA_PROP_frequency, SPA_POD_Float(((sin(data->freq_accum) + 1.0) * 200.0) + 440.0),
SPA_PROP_volume, SPA_POD_Float((sin(data->volume_accum) / 2.0) + 0.5));
pod = spa_pod_builder_pop(&b, &f[0]);
#endif
spa_debug_pod(0, NULL, pod);
data->freq_accum += M_PI_M2 / 880.0;
if (data->freq_accum >= M_PI_M2)
data->freq_accum -= M_PI_M2;
data->volume_accum += M_PI_M2 / 2000.0;
if (data->volume_accum >= M_PI_M2)
data->volume_accum -= M_PI_M2;
}
static int on_sink_ready(void *_data, int status)
{
struct data *data = _data;
update_props(data);
spa_graph_node_process(&data->source_node);
spa_graph_node_process(&data->sink_node);
return 0;
}
static int
on_sink_reuse_buffer(void *_data, uint32_t port_id, uint32_t buffer_id)
{
struct data *data = _data;
data->source_sink_io[0].buffer_id = buffer_id;
return 0;
}
static const struct spa_node_callbacks sink_callbacks = {
SPA_VERSION_NODE_CALLBACKS,
.ready = on_sink_ready,
.reuse_buffer = on_sink_reuse_buffer
};
static int make_nodes(struct data *data, const char *device)
{
int res;
struct spa_pod *props;
struct spa_pod_builder b = { 0 };
uint8_t buffer[512];
//uint32_t idx;
if ((res = make_node(data, &data->sink,
"alsa/libspa-alsa.so",
SPA_NAME_API_ALSA_PCM_SINK)) < 0) {
printf("can't create alsa-sink: %d\n", res);
return res;
}
spa_node_set_callbacks(data->sink, &sink_callbacks, data);
spa_pod_builder_init(&b, buffer, sizeof(buffer));
props = spa_pod_builder_add_object(&b,
SPA_TYPE_OBJECT_Props, 0,
SPA_PROP_device, SPA_POD_String(device ? device : "hw:0"),
SPA_PROP_minLatency, SPA_POD_Int(MIN_LATENCY));
spa_debug_pod(0, NULL, props);
if ((res = spa_node_set_param(data->sink, SPA_PARAM_Props, 0, props)) < 0)
printf("got set_props error %d\n", res);
if ((res = make_node(data, &data->source,
"audiotestsrc/libspa-audiotestsrc.so",
"audiotestsrc")) < 0) {
printf("can't create audiotestsrc: %d\n", res);
return res;
}
spa_pod_builder_init(&b, buffer, sizeof(buffer));
props = spa_pod_builder_add_object(&b,
SPA_TYPE_OBJECT_Props, 0,
SPA_PROP_frequency, SPA_POD_Float(600.0),
SPA_PROP_volume, SPA_POD_Float(0.5),
SPA_PROP_live, SPA_POD_Bool(false));
if ((res = spa_node_set_param(data->source, SPA_PARAM_Props, 0, props)) < 0)
printf("got set_props error %d\n", res);
if ((res = spa_node_port_set_io(data->source,
SPA_DIRECTION_OUTPUT, 0,
SPA_IO_Control,
&data->ctrl, sizeof(data->ctrl))) < 0) {
printf("can't set_io freq: %d\n", res);
return res;
}
data->source_sink_io[0] = SPA_IO_BUFFERS_INIT;
spa_node_port_set_io(data->source,
SPA_DIRECTION_OUTPUT, 0,
SPA_IO_Buffers,
&data->source_sink_io[0], sizeof(data->source_sink_io[0]));
spa_node_port_set_io(data->sink,
SPA_DIRECTION_INPUT, 0,
SPA_IO_Buffers,
&data->source_sink_io[0], sizeof(data->source_sink_io[0]));
spa_graph_node_init(&data->source_node, &data->source_state);
spa_graph_node_set_callbacks(&data->source_node, &spa_graph_node_impl_default, data->source);
spa_graph_node_add(&data->graph, &data->source_node);
spa_graph_port_init(&data->source_out, SPA_DIRECTION_OUTPUT, 0, 0);
spa_graph_port_add(&data->source_node, &data->source_out);
spa_graph_node_init(&data->sink_node, &data->sink_state);
spa_graph_node_set_callbacks(&data->sink_node, &spa_graph_node_impl_default, data->sink);
spa_graph_node_add(&data->graph, &data->sink_node);
spa_graph_port_init(&data->sink_in, SPA_DIRECTION_INPUT, 0, 0);
spa_graph_port_add(&data->sink_node, &data->sink_in);
spa_graph_port_link(&data->source_out, &data->sink_in);
return res;
}
static int negotiate_formats(struct data *data)
{
int res;
struct spa_pod *format;
struct spa_pod_builder b = { 0 };
uint8_t buffer[4096];
spa_pod_builder_init(&b, buffer, sizeof(buffer));
format = spa_format_audio_raw_build(&b, 0,
&SPA_AUDIO_INFO_RAW_INIT(
.format = SPA_AUDIO_FORMAT_S16,
.rate = 48000,
.channels = 2 ));
if ((res = spa_node_port_set_param(data->sink,
SPA_DIRECTION_INPUT, 0,
SPA_PARAM_Format, 0, format)) < 0)
return res;
if ((res = spa_node_port_set_param(data->source,
SPA_DIRECTION_OUTPUT, 0,
SPA_PARAM_Format, 0, format)) < 0)
return res;
init_buffer(data, data->source_buffers, data->source_buffer, 1, BUFFER_SIZE);
if ((res =
spa_node_port_use_buffers(data->sink,
SPA_DIRECTION_INPUT, 0, 0,
data->source_buffers, 1)) < 0)
return res;
if ((res =
spa_node_port_use_buffers(data->source,
SPA_DIRECTION_OUTPUT, 0, 0,
data->source_buffers, 1)) < 0)
return res;
return 0;
}
static void *loop(void *user_data)
{
struct data *data = user_data;
printf("enter thread\n");
spa_loop_control_enter(data->control);
while (data->running) {
spa_loop_control_iterate(data->control, -1);
}
printf("leave thread\n");
spa_loop_control_leave(data->control);
return NULL;
}
static void run_async_sink(struct data *data)
{
int res, err;
struct spa_command cmd;
cmd = SPA_NODE_COMMAND_INIT(SPA_NODE_COMMAND_Start);
if ((res = spa_node_send_command(data->sink, &cmd)) < 0)
printf("got error %d\n", res);
spa_loop_control_leave(data->control);
data->running = true;
if ((err = pthread_create(&data->thread, NULL, loop, data)) != 0) {
printf("can't create thread: %d %s", err, strerror(err));
data->running = false;
}
printf("sleeping for 1000 seconds\n");
sleep(1000);
if (data->running) {
data->running = false;
pthread_join(data->thread, NULL);
}
spa_loop_control_enter(data->control);
cmd = SPA_NODE_COMMAND_INIT(SPA_NODE_COMMAND_Pause);
if ((res = spa_node_send_command(data->sink, &cmd)) < 0)
printf("got error %d\n", res);
}
static int load_handle(struct data *data, struct spa_handle **handle, const char *lib, const char *name)
{
int res;
void *hnd;
spa_handle_factory_enum_func_t enum_func;
uint32_t i;
char *path;
if ((path = spa_aprintf("%s/%s", data->plugin_dir, lib)) == NULL) {
return -ENOMEM;
}
if ((hnd = dlopen(path, RTLD_NOW)) == NULL) {
printf("can't load %s: %s\n", lib, dlerror());
free(path);
return -ENOENT;
}
free(path);
if ((enum_func = dlsym(hnd, SPA_HANDLE_FACTORY_ENUM_FUNC_NAME)) == NULL) {
printf("can't find enum function\n");
return -ENOENT;
}
for (i = 0;;) {
const struct spa_handle_factory *factory;
if ((res = enum_func(&factory, &i)) <= 0) {
if (res != 0)
printf("can't enumerate factories: %s\n", spa_strerror(res));
break;
}
if (factory->version < 1)
continue;
if (!spa_streq(factory->name, name))
continue;
*handle = calloc(1, spa_handle_factory_get_size(factory, NULL));
if ((res = spa_handle_factory_init(factory, *handle,
NULL, data->support,
data->n_support)) < 0) {
printf("can't make factory instance: %d\n", res);
return res;
}
return 0;
}
return -EBADF;
}
static int init_data(struct data *data)
{
int res;
const char *str;
struct spa_handle *handle = NULL;
void *iface;
if ((str = getenv("SPA_PLUGIN_DIR")) == NULL)
str = PLUGINDIR;
data->plugin_dir = str;
/* init the graph */
spa_graph_init(&data->graph, &data->graph_state);
/* set the default log */
data->log = &default_log.log;
data->support[data->n_support++] = SPA_SUPPORT_INIT(SPA_TYPE_INTERFACE_Log, data->log);
/* load and set support system */
if ((res = load_handle(data, &handle,
"support/libspa-support.so",
SPA_NAME_SUPPORT_SYSTEM)) < 0)
return res;
if ((res = spa_handle_get_interface(handle, SPA_TYPE_INTERFACE_System, &iface)) < 0) {
printf("can't get System interface %d\n", res);
return res;
}
data->system = iface;
data->support[data->n_support++] = SPA_SUPPORT_INIT(SPA_TYPE_INTERFACE_System, data->system);
data->support[data->n_support++] = SPA_SUPPORT_INIT(SPA_TYPE_INTERFACE_DataSystem, data->system);
/* load and set support loop and loop control */
if ((res = load_handle(data, &handle,
"support/libspa-support.so",
SPA_NAME_SUPPORT_LOOP)) < 0)
return res;
if ((res = spa_handle_get_interface(handle, SPA_TYPE_INTERFACE_Loop, &iface)) < 0) {
printf("can't get interface %d\n", res);
return res;
}
data->loop = iface;
data->support[data->n_support++] = SPA_SUPPORT_INIT(SPA_TYPE_INTERFACE_Loop, data->loop);
data->support[data->n_support++] = SPA_SUPPORT_INIT(SPA_TYPE_INTERFACE_DataLoop, data->loop);
if ((res = spa_handle_get_interface(handle, SPA_TYPE_INTERFACE_LoopControl, &iface)) < 0) {
printf("can't get interface %d\n", res);
return res;
}
data->control = iface;
if ((str = getenv("SPA_DEBUG")))
data->log->level = atoi(str);
return 0;
}
int main(int argc, char *argv[])
{
struct data data = { NULL };
int res;
if ((res = init_data(&data)) < 0) {
printf("can't init data: %d (%s)\n", res, spa_strerror(res));
return -1;
}
if ((res = make_nodes(&data, argc > 1 ? argv[1] : NULL)) < 0) {
printf("can't make nodes: %d (%s)\n", res, spa_strerror(res));
return -1;
}
if ((res = negotiate_formats(&data)) < 0) {
printf("can't negotiate nodes: %d (%s)\n", res, spa_strerror(res));
return -1;
}
spa_loop_control_enter(data.control);
run_async_sink(&data);
spa_loop_control_leave(data.control);
return 0;
}
format-utils.h
pod.h
spa/debug/pod.h
graph.h
spa/graph/graph.h
res
uint32_t int int res
Definition core.h:433
SPA_META_Header
@ SPA_META_Header
struct spa_meta_header
Definition meta.h:37
SPA_DATA_MemPtr
@ SPA_DATA_MemPtr
pointer to memory, the data field in struct spa_data is set.
Definition buffer.h:43
SPA_CONTROL_Properties
@ SPA_CONTROL_Properties
SPA_TYPE_OBJECT_Props.
Definition control.h:32
spa_debug_pod
SPA_API_DEBUG_POD int spa_debug_pod(int indent, const struct spa_type_info *info, const struct spa_pod *pod)
Definition pod.h:248
spa_graph_port_init
SPA_API_GRAPH void spa_graph_port_init(struct spa_graph_port *port, enum spa_direction direction, uint32_t port_id, uint32_t flags)
Definition graph.h:290
spa_graph_node_impl_default
static const struct spa_graph_node_callbacks spa_graph_node_impl_default
Definition graph.h:353
spa_graph_node_init
SPA_API_GRAPH void spa_graph_node_init(struct spa_graph_node *node, struct spa_graph_state *state)
Definition graph.h:223
spa_graph_node_add
SPA_API_GRAPH void spa_graph_node_add(struct spa_graph *graph, struct spa_graph_node *node)
Definition graph.h:268
spa_graph_port_link
SPA_API_GRAPH void spa_graph_port_link(struct spa_graph_port *out, struct spa_graph_port *in)
Definition graph.h:317
spa_graph_port_add
SPA_API_GRAPH void spa_graph_port_add(struct spa_graph_node *node, struct spa_graph_port *port)
Definition graph.h:302
spa_graph_node_process
#define spa_graph_node_process(n)
Definition graph.h:130
spa_graph_node_set_callbacks
SPA_API_GRAPH void spa_graph_node_set_callbacks(struct spa_graph_node *node, const struct spa_graph_node_callbacks *callbacks, void *data)
Definition graph.h:260
spa_graph_init
SPA_API_GRAPH void spa_graph_init(struct spa_graph *graph, struct spa_graph_state *state)
Definition graph.h:196
spa_handle_factory_enum_func_t
int(* spa_handle_factory_enum_func_t)(const struct spa_handle_factory **factory, uint32_t *index)
The function signature of the entry point in a plugin.
Definition plugin.h:222
SPA_HANDLE_FACTORY_ENUM_FUNC_NAME
#define SPA_HANDLE_FACTORY_ENUM_FUNC_NAME
Definition plugin.h:226
spa_handle_factory_get_size
SPA_API_PLUGIN size_t spa_handle_factory_get_size(const struct spa_handle_factory *object, const struct spa_dict *params)
Definition plugin.h:192
spa_handle_get_interface
SPA_API_PLUGIN int spa_handle_get_interface(struct spa_handle *object, const char *type, void **iface)
Definition plugin.h:74
SPA_SUPPORT_INIT
#define SPA_SUPPORT_INIT(type, data)
Definition plugin.h:117
spa_handle_factory_init
SPA_API_PLUGIN int spa_handle_factory_init(const struct spa_handle_factory *object, struct spa_handle *handle, const struct spa_dict *info, const struct spa_support *support, uint32_t n_support)
Definition plugin.h:198
SPA_LOG_IMPL
#define SPA_LOG_IMPL(name)
Definition log-impl.h:119
SPA_TYPE_INTERFACE_Log
#define SPA_TYPE_INTERFACE_Log
The Log interface.
Definition log.h:68
spa_loop_control_enter
SPA_API_LOOP void spa_loop_control_enter(struct spa_loop_control *object)
Definition loop.h:409
SPA_TYPE_INTERFACE_DataLoop
#define SPA_TYPE_INTERFACE_DataLoop
Definition loop.h:45
SPA_TYPE_INTERFACE_Loop
#define SPA_TYPE_INTERFACE_Loop
Definition loop.h:43
spa_loop_control_iterate
SPA_API_LOOP int spa_loop_control_iterate(struct spa_loop_control *object, int timeout)
Definition loop.h:417
SPA_TYPE_INTERFACE_LoopControl
#define SPA_TYPE_INTERFACE_LoopControl
Definition loop.h:51
spa_loop_control_leave
SPA_API_LOOP void spa_loop_control_leave(struct spa_loop_control *object)
Definition loop.h:413
SPA_NAME_SUPPORT_LOOP
#define SPA_NAME_SUPPORT_LOOP
A Loop/LoopControl/LoopUtils interface.
Definition names.h:34
SPA_NAME_SUPPORT_SYSTEM
#define SPA_NAME_SUPPORT_SYSTEM
A System interface.
Definition names.h:37
SPA_NAME_API_ALSA_PCM_SINK
#define SPA_NAME_API_ALSA_PCM_SINK
an alsa Node interface for playback PCM
Definition names.h:112
spa_node_port_set_param
SPA_API_NODE int spa_node_port_set_param(struct spa_node *object, enum spa_direction direction, uint32_t port_id, uint32_t id, uint32_t flags, const struct spa_pod *param)
Definition node.h:780
SPA_TYPE_INTERFACE_Node
#define SPA_TYPE_INTERFACE_Node
Definition node.h:47
SPA_VERSION_NODE_CALLBACKS
#define SPA_VERSION_NODE_CALLBACKS
Definition node.h:244
spa_node_port_set_io
SPA_API_NODE int spa_node_port_set_io(struct spa_node *object, enum spa_direction direction, uint32_t port_id, uint32_t id, void *data, size_t size)
Definition node.h:799
spa_node_set_param
SPA_API_NODE int spa_node_set_param(struct spa_node *object, uint32_t id, uint32_t flags, const struct spa_pod *param)
Definition node.h:740
spa_node_port_use_buffers
SPA_API_NODE int spa_node_port_use_buffers(struct spa_node *object, enum spa_direction direction, uint32_t port_id, uint32_t flags, struct spa_buffer **buffers, uint32_t n_buffers)
Definition node.h:789
spa_node_send_command
SPA_API_NODE int spa_node_send_command(struct spa_node *object, const struct spa_command *command)
Definition node.h:753
SPA_IO_BUFFERS_INIT
#define SPA_IO_BUFFERS_INIT
Definition io.h:96
spa_node_set_callbacks
SPA_API_NODE int spa_node_set_callbacks(struct spa_node *object, const struct spa_node_callbacks *callbacks, void *data)
Definition node.h:721
SPA_NODE_COMMAND_INIT
#define SPA_NODE_COMMAND_INIT(id)
Definition command.h:50
SPA_IO_Control
@ SPA_IO_Control
area for control messages, struct spa_io_sequence
Definition io.h:43
SPA_IO_Buffers
@ SPA_IO_Buffers
area to exchange buffers, struct spa_io_buffers
Definition io.h:38
SPA_NODE_COMMAND_Pause
@ SPA_NODE_COMMAND_Pause
pause a node.
Definition command.h:28
SPA_NODE_COMMAND_Start
@ SPA_NODE_COMMAND_Start
start a node, this makes it start emitting scheduling events
Definition command.h:30
SPA_AUDIO_INFO_RAW_INIT
#define SPA_AUDIO_INFO_RAW_INIT(...)
Definition raw.h:304
spa_format_audio_raw_build
SPA_API_AUDIO_RAW_UTILS struct spa_pod * spa_format_audio_raw_build(struct spa_pod_builder *builder, uint32_t id, const struct spa_audio_info_raw *info)
Definition raw-utils.h:111
SPA_PROP_minLatency
@ SPA_PROP_minLatency
Definition props.h:53
SPA_PROP_device
@ SPA_PROP_device
Definition props.h:47
SPA_PROP_live
@ SPA_PROP_live
Definition props.h:58
SPA_PROP_volume
@ SPA_PROP_volume
a volume (Float), 0.0 silence, 1.0 no attenutation
Definition props.h:70
SPA_PROP_frequency
@ SPA_PROP_frequency
Definition props.h:69
SPA_PARAM_Format
@ SPA_PARAM_Format
configured format as SPA_TYPE_OBJECT_Format
Definition param.h:34
SPA_PARAM_Props
@ SPA_PARAM_Props
properties as SPA_TYPE_OBJECT_Props
Definition param.h:32
SPA_AUDIO_FORMAT_S16
@ SPA_AUDIO_FORMAT_S16
Definition raw.h:96
spa_pod_builder_pop
SPA_API_POD_BUILDER void * spa_pod_builder_pop(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
Definition builder.h:213
SPA_POD_String
#define SPA_POD_String(val)
Definition vararg.h:102
SPA_POD_Bool
#define SPA_POD_Bool(val)
Definition vararg.h:48
spa_pod_builder_control
SPA_API_POD_BUILDER int spa_pod_builder_control(struct spa_pod_builder *builder, uint32_t offset, uint32_t type)
Definition builder.h:511
spa_pod_builder_push_object
SPA_API_POD_BUILDER 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:475
spa_pod_builder_init
SPA_API_POD_BUILDER void spa_pod_builder_init(struct spa_pod_builder *builder, void *data, uint32_t size)
Definition builder.h:102
spa_pod_builder_add_object
#define spa_pod_builder_add_object(b, type, id,...)
Definition builder.h:725
SPA_POD_Float
#define SPA_POD_Float(val)
Definition vararg.h:84
spa_pod_builder_float
SPA_API_POD_BUILDER int spa_pod_builder_float(struct spa_pod_builder *builder, float val)
Definition builder.h:314
spa_pod_builder_push_sequence
SPA_API_POD_BUILDER int spa_pod_builder_push_sequence(struct spa_pod_builder *builder, struct spa_pod_frame *frame, uint32_t unit)
Definition builder.h:500
SPA_POD_Int
#define SPA_POD_Int(val)
Definition vararg.h:58
spa_pod_builder_prop
SPA_API_POD_BUILDER int spa_pod_builder_prop(struct spa_pod_builder *builder, uint32_t key, uint32_t flags)
Definition builder.h:490
spa_streq
SPA_API_STRING bool spa_streq(const char *s1, const char *s2)
Definition string.h:52
SPA_TYPE_INTERFACE_System
#define SPA_TYPE_INTERFACE_System
a collection of core system functions
Definition system.h:50
SPA_TYPE_INTERFACE_DataSystem
#define SPA_TYPE_INTERFACE_DataSystem
Definition system.h:52
SPA_TYPE_OBJECT_Props
@ SPA_TYPE_OBJECT_Props
Definition type.h:86
spa_aprintf
#define spa_aprintf(_fmt,...)
Definition defs.h:532
SPA_DIRECTION_INPUT
@ SPA_DIRECTION_INPUT
Definition defs.h:107
SPA_DIRECTION_OUTPUT
@ SPA_DIRECTION_OUTPUT
Definition defs.h:108
io.h
spa/node/io.h
log-impl.h
spa/support/log-impl.h
names.h
spa/utils/names.h
param.h
spa/param/param.h
plugin.h
spa/support/plugin.h
props.h
result.h
spa/utils/result.h
node.h
spa/node/node.h
utils.h
loop.h
spa/support/loop.h
string.h
spa/utils/string.h
spa_buffer
A Buffer.
Definition buffer.h:110
spa_chunk
Chunk of memory, can change for each buffer.
Definition buffer.h:59
spa_command
Definition command.h:29
spa_data
Data for a buffer this stays constant for a buffer.
Definition buffer.h:78
spa_graph_node
Definition graph.h:108
spa_graph_port
Definition graph.h:133
spa_graph_state
Definition graph.h:57
spa_graph
Definition graph.h:91
spa_handle_factory
Definition plugin.h:119
spa_handle_factory::version
uint32_t version
Definition plugin.h:123
spa_handle
Definition plugin.h:43
spa_io_buffers
IO area to exchange buffers.
Definition io.h:80
spa_log
Definition log.h:71
spa_loop_control
Definition loop.h:54
spa_loop
Definition loop.h:48
spa_meta_header
Describes essential buffer header metadata such as flags and timestamps.
Definition meta.h:85
spa_meta
A metadata element.
Definition meta.h:66
spa_node_callbacks
Node callbacks.
Definition node.h:242
spa_node
Definition node.h:51
spa_pod_builder
Definition builder.h:63
spa_pod_frame
Definition body.h:38
spa_pod_frame::pod
struct spa_pod pod
Definition body.h:39
spa_pod
Definition pod.h:57
spa_support
Extra supporting infrastructure passed to the init() function of a factory.
Definition plugin.h:98
spa_system
Definition system.h:56