spa/examples/adapter-control.c

Running audioadapter nodes.
Runs an output audioadapter using audiotestsrc as follower with an input audioadapter using alsa-pcm-sink as follower for easy testing.

/* Spa
*
* Copyright © 2020 Collabora Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
/*
[title]
Running audioadapter nodes.
[title]
[doc]
Runs an output audioadapter using audiotestsrc as follower
with an input audioadapter using alsa-pcm-sink as follower
for easy testing.
[doc]
*/
#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/control/control.h>
#include <spa/graph/graph.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>
static SPA_LOG_IMPL(default_log);
#define MIN_LATENCY 1024
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 graph_source_node;
struct spa_graph_node graph_sink_node;
struct spa_graph_state graph_source_state;
struct spa_graph_state graph_sink_state;
struct spa_graph_port graph_source_port_0;
struct spa_graph_port graph_sink_port_0;
struct spa_node *source_follower_node; // audiotestsrc
struct spa_node *source_node; // adapter for audiotestsrc
struct spa_node *sink_follower_node; // alsa-pcm-sink
struct spa_node *sink_node; // adapter for alsa-pcm-sink
struct spa_io_buffers source_sink_io[1];
struct spa_buffer *source_buffers[1];
struct buffer source_buffer[1];
uint8_t ctrl[1024];
bool running;
pthread_t thread;
};
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;
hnd = dlopen(path, RTLD_NOW);
free(path);
if (hnd == NULL) {
printf("can't load %s: %s\n", lib, dlerror());
return -ENOENT;
}
if ((enum_func = dlsym(hnd, SPA_HANDLE_FACTORY_ENUM_FUNC_NAME)) == NULL) {
printf("can't find enum function\n");
res = -ENOENT;
goto exit_cleanup;
}
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);
goto exit_cleanup;
}
return 0;
}
return -EBADF;
exit_cleanup:
dlclose(hnd);
return res;
}
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;
}
static int make_node(struct data *data, struct spa_node **node, const char *lib,
const char *name, const struct spa_dict *props)
{
struct spa_handle *handle;
int res = 0;
void *hnd = NULL;
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;
hnd = dlopen(path, RTLD_NOW);
free(path);
if (hnd == NULL) {
printf("can't load %s: %s\n", lib, dlerror());
return -ENOENT;
}
if ((enum_func = dlsym(hnd, SPA_HANDLE_FACTORY_ENUM_FUNC_NAME)) == NULL) {
printf("can't find enum function\n");
res = -ENOENT;
goto exit_cleanup;
}
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, props, data->support,
data->n_support)) < 0) {
printf("can't make factory instance: %d\n", res);
goto exit_cleanup;
}
if ((res = spa_handle_get_interface(handle, SPA_TYPE_INTERFACE_Node, &iface)) < 0) {
printf("can't get interface %d\n", res);
goto exit_cleanup;
}
*node = iface;
return 0;
}
return -EBADF;
exit_cleanup:
dlclose(hnd);
return res;
}
static int on_sink_node_ready(void *_data, int status)
{
struct data *data = _data;
spa_graph_node_process(&data->graph_source_node);
spa_graph_node_process(&data->graph_sink_node);
return 0;
}
static int
on_sink_node_reuse_buffer(void *_data, uint32_t port_id, uint32_t buffer_id)
{
struct data *data = _data;
printf ("reuse_buffer: port_id=%d\n", port_id);
data->source_sink_io[0].buffer_id = buffer_id;
return 0;
}
static const struct spa_node_callbacks sink_node_callbacks = {
SPA_VERSION_NODE_CALLBACKS,
.ready = on_sink_node_ready,
.reuse_buffer = on_sink_node_reuse_buffer
};
static int make_nodes(struct data *data, const char *device)
{
int res = 0;
struct spa_pod *props;
struct spa_pod_builder b = { 0 };
uint8_t buffer[1024];
char value[32];
struct spa_dict_item items[1];
struct spa_audio_info_raw info;
struct spa_pod *param;
/* make the source node (audiotestsrc) */
if ((res = make_node(data, &data->source_follower_node,
"audiotestsrc/libspa-audiotestsrc.so",
"audiotestsrc",
NULL)) < 0) {
printf("can't create source follower node (audiotestsrc): %d\n", res);
return res;
}
/* set the format on the source */
spa_pod_builder_init(&b, buffer, sizeof(buffer));
param = 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->source_follower_node,
SPA_DIRECTION_OUTPUT, 0,
SPA_PARAM_Format, 0, param)) < 0) {
printf("can't set format on follower node (audiotestsrc): %d\n", res);
return res;
}
/* make the sink adapter node */
snprintf(value, sizeof(value), "pointer:%p", data->source_follower_node);
items[0] = SPA_DICT_ITEM_INIT("audio.adapt.follower", value);
if ((res = make_node(data, &data->source_node,
"audioconvert/libspa-audioconvert.so",
SPA_NAME_AUDIO_ADAPT,
&SPA_DICT_INIT(items, 1))) < 0) {
printf("can't create source adapter node: %d\n", res);
return res;
}
/* setup the source node props */
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_node, SPA_PARAM_Props, 0, props)) < 0) {
printf("can't setup source follower node %d\n", res);
return res;
}
/* setup the source node port config */
spa_zero(info);
info.format = SPA_AUDIO_FORMAT_F32P;
info.channels = 1;
info.rate = 48000;
info.position[0] = SPA_AUDIO_CHANNEL_MONO;
spa_pod_builder_init(&b, buffer, sizeof(buffer));
param = spa_format_audio_raw_build(&b, SPA_PARAM_Format, &info);
param = spa_pod_builder_add_object(&b,
SPA_TYPE_OBJECT_ParamPortConfig, SPA_PARAM_PortConfig,
SPA_PARAM_PORT_CONFIG_direction, SPA_POD_Id(SPA_DIRECTION_OUTPUT),
SPA_PARAM_PORT_CONFIG_mode, SPA_POD_Id(SPA_PARAM_PORT_CONFIG_MODE_dsp),
SPA_PARAM_PORT_CONFIG_format, SPA_POD_Pod(param));
if ((res = spa_node_set_param(data->source_node, SPA_PARAM_PortConfig, 0, param) < 0)) {
printf("can't setup source node %d\n", res);
return res;
}
/* make the sink follower node (alsa-pcm-sink) */
if ((res = make_node(data, &data->sink_follower_node,
"alsa/libspa-alsa.so",
SPA_NAME_API_ALSA_PCM_SINK,
NULL)) < 0) {
printf("can't create sink follower node (alsa-pcm-sink): %d\n", res);
return res;
}
/* make the sink adapter node */
snprintf(value, sizeof(value), "pointer:%p", data->sink_follower_node);
items[0] = SPA_DICT_ITEM_INIT("audio.adapt.follower", value);
if ((res = make_node(data, &data->sink_node,
"audioconvert/libspa-audioconvert.so",
SPA_NAME_AUDIO_ADAPT,
&SPA_DICT_INIT(items, 1))) < 0) {
printf("can't create sink adapter node: %d\n", res);
return res;
}
/* add sink follower node callbacks */
spa_node_set_callbacks(data->sink_node, &sink_node_callbacks, data);
/* setup the sink node props */
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));
if ((res = spa_node_set_param(data->sink_follower_node, SPA_PARAM_Props, 0, props)) < 0) {
printf("can't setup sink follower node %d\n", res);
return res;
}
/* setup the sink node port config */
spa_zero(info);
info.format = SPA_AUDIO_FORMAT_F32P;
info.channels = 1;
info.rate = 48000;
info.position[0] = SPA_AUDIO_CHANNEL_MONO;
spa_pod_builder_init(&b, buffer, sizeof(buffer));
param = spa_format_audio_raw_build(&b, SPA_PARAM_Format, &info);
param = spa_pod_builder_add_object(&b,
SPA_TYPE_OBJECT_ParamPortConfig, SPA_PARAM_PortConfig,
SPA_PARAM_PORT_CONFIG_direction, SPA_POD_Id(SPA_DIRECTION_INPUT),
SPA_PARAM_PORT_CONFIG_mode, SPA_POD_Id(SPA_PARAM_PORT_CONFIG_MODE_dsp),
SPA_PARAM_PORT_CONFIG_format, SPA_POD_Pod(param));
if ((res = spa_node_set_param(data->sink_node, SPA_PARAM_PortConfig, 0, param) < 0)) {
printf("can't setup sink node %d\n", res);
return res;
}
/* set io buffers on source and sink nodes */
data->source_sink_io[0] = SPA_IO_BUFFERS_INIT;
if ((res = spa_node_port_set_io(data->source_node,
SPA_DIRECTION_OUTPUT, 0,
SPA_IO_Buffers,
&data->source_sink_io[0], sizeof(data->source_sink_io[0]))) < 0) {
printf("can't set io buffers on port 0 of source node: %d\n", res);
return res;
}
if ((res = spa_node_port_set_io(data->sink_node,
SPA_DIRECTION_INPUT, 0,
SPA_IO_Buffers,
&data->source_sink_io[0], sizeof(data->source_sink_io[0]))) < 0) {
printf("can't set io buffers on port 0 of sink node: %d\n", res);
return res;
}
/* add source node to the graph */
spa_graph_node_init(&data->graph_source_node, &data->graph_source_state);
spa_graph_node_set_callbacks(&data->graph_source_node, &spa_graph_node_impl_default, data->source_node);
spa_graph_node_add(&data->graph, &data->graph_source_node);
spa_graph_port_init(&data->graph_source_port_0, SPA_DIRECTION_OUTPUT, 0, 0);
spa_graph_port_add(&data->graph_source_node, &data->graph_source_port_0);
/* add sink node to the graph */
spa_graph_node_init(&data->graph_sink_node, &data->graph_sink_state);
spa_graph_node_set_callbacks(&data->graph_sink_node, &spa_graph_node_impl_default, data->sink_node);
spa_graph_node_add(&data->graph, &data->graph_sink_node);
spa_graph_port_init(&data->graph_sink_port_0, SPA_DIRECTION_INPUT, 0, 0);
spa_graph_port_add(&data->graph_sink_node, &data->graph_sink_port_0);
/* link source and sink nodes */
spa_graph_port_link(&data->graph_source_port_0, &data->graph_sink_port_0);
return res;
}
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 negotiate_formats(struct data *data)
{
int res;
struct spa_pod *filter = NULL, *param = NULL;
struct spa_pod_builder b = { 0 };
uint8_t buffer[4096];
uint32_t state = 0;
size_t buffer_size = 1024;
/* get the source follower node buffer size */
spa_pod_builder_init(&b, buffer, sizeof(buffer));
if (spa_node_port_enum_params_sync(data->source_follower_node,
SPA_DIRECTION_OUTPUT, 0,
SPA_PARAM_Buffers, &state, filter, &param, &b) != 1)
return -ENOTSUP;
spa_pod_fixate(param);
if ((res = spa_pod_parse_object(param, SPA_TYPE_OBJECT_ParamBuffers, NULL,
SPA_PARAM_BUFFERS_size, SPA_POD_Int(&buffer_size))) < 0)
return res;
/* set the sink and source formats */
spa_pod_builder_init(&b, buffer, sizeof(buffer));
param = spa_format_audio_dsp_build(&b, 0,
&SPA_AUDIO_INFO_DSP_INIT(
.format = SPA_AUDIO_FORMAT_F32P));
if ((res = spa_node_port_set_param(data->source_node,
SPA_DIRECTION_OUTPUT, 0, SPA_PARAM_Format, 0, param)) < 0)
return res;
if ((res = spa_node_port_set_param(data->sink_node,
SPA_DIRECTION_INPUT, 0, SPA_PARAM_Format, 0, param)) < 0)
return res;
/* use buffers on the source and sink */
init_buffer(data, data->source_buffers, data->source_buffer, 1, buffer_size);
if ((res = spa_node_port_use_buffers(data->source_node,
SPA_DIRECTION_OUTPUT, 0, 0, data->source_buffers, 1)) < 0)
return res;
if ((res = spa_node_port_use_buffers(data->sink_node,
SPA_DIRECTION_INPUT, 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;
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->source_node, &cmd)) < 0)
printf("got error %d\n", res);
if ((res = spa_node_send_command(data->sink_node, &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->source_node, &cmd)) < 0)
printf("got error %d\n", res);
if ((res = spa_node_send_command(data->sink_node, &cmd)) < 0)
printf("got error %d\n", res);
}
int main(int argc, char *argv[])
{
struct data data = { 0 };
int res = 0;
/* init data */
if ((res = init_data(&data)) < 0) {
printf("can't init data: %d (%s)\n", res, spa_strerror(res));
return -1;
}
/* make the nodes (audiotestsrc and adapter with alsa-pcm-sink as follower) */
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;
}
/* Negotiate format */
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);
}
format-utils.h
graph.h
spa/graph/graph.h
SPA_META_Header
@ SPA_META_Header
struct spa_meta_header
Definition: meta.h:47
SPA_DATA_MemPtr
@ SPA_DATA_MemPtr
pointer to memory, the data field in struct spa_data is set.
Definition: buffer.h:52
SPA_DICT_ITEM_INIT
#define SPA_DICT_ITEM_INIT(key, value)
Definition: dict.h:57
SPA_DICT_INIT
#define SPA_DICT_INIT(items, n_items)
Definition: dict.h:68
spa_graph_node_set_callbacks
static void spa_graph_node_set_callbacks(struct spa_graph_node *node, const struct spa_graph_node_callbacks *callbacks, void *data)
Definition: graph.h:268
spa_graph_node_impl_default
static const struct spa_graph_node_callbacks spa_graph_node_impl_default
Definition: graph.h:361
spa_graph_init
static void spa_graph_init(struct spa_graph *graph, struct spa_graph_state *state)
Definition: graph.h:204
spa_graph_node_add
static void spa_graph_node_add(struct spa_graph *graph, struct spa_graph_node *node)
Definition: graph.h:276
spa_graph_node_init
static void spa_graph_node_init(struct spa_graph_node *node, struct spa_graph_state *state)
Definition: graph.h:231
spa_graph_port_init
static void spa_graph_port_init(struct spa_graph_port *port, enum spa_direction direction, uint32_t port_id, uint32_t flags)
Definition: graph.h:298
spa_graph_port_add
static void spa_graph_port_add(struct spa_graph_node *node, struct spa_graph_port *port)
Definition: graph.h:310
spa_graph_port_link
static void spa_graph_port_link(struct spa_graph_port *out, struct spa_graph_port *in)
Definition: graph.h:325
spa_graph_node_process
#define spa_graph_node_process(n)
Definition: graph.h:138
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:202
SPA_HANDLE_FACTORY_ENUM_FUNC_NAME
#define SPA_HANDLE_FACTORY_ENUM_FUNC_NAME
Definition: plugin.h:206
SPA_SUPPORT_INIT
#define SPA_SUPPORT_INIT(type, data)
Definition: plugin.h:115
spa_handle_factory_init
#define spa_handle_factory_init(h,...)
Definition: plugin.h:190
spa_handle_get_interface
#define spa_handle_get_interface(h,...)
Definition: plugin.h:80
spa_handle_factory_get_size
#define spa_handle_factory_get_size(h,...)
Definition: plugin.h:189
SPA_LOG_IMPL
#define SPA_LOG_IMPL(name)
Definition: log-impl.h:138
SPA_TYPE_INTERFACE_Log
#define SPA_TYPE_INTERFACE_Log
The Log interface.
Definition: log.h:78
spa_loop_control_enter
#define spa_loop_control_enter(l)
Enter a loop.
Definition: loop.h:255
spa_loop_control_leave
#define spa_loop_control_leave(l)
Leave a loop.
Definition: loop.h:258
spa_loop_control_iterate
#define spa_loop_control_iterate(l,...)
Perform one iteration of the loop.
Definition: loop.h:261
SPA_TYPE_INTERFACE_DataLoop
#define SPA_TYPE_INTERFACE_DataLoop
Definition: loop.h:53
SPA_TYPE_INTERFACE_Loop
#define SPA_TYPE_INTERFACE_Loop
Definition: loop.h:51
SPA_TYPE_INTERFACE_LoopControl
#define SPA_TYPE_INTERFACE_LoopControl
Definition: loop.h:59
SPA_NAME_SUPPORT_LOOP
#define SPA_NAME_SUPPORT_LOOP
A Loop/LoopControl/LoopUtils interface.
Definition: names.h:54
SPA_NAME_SUPPORT_SYSTEM
#define SPA_NAME_SUPPORT_SYSTEM
A System interface.
Definition: names.h:57
SPA_NAME_AUDIO_ADAPT
#define SPA_NAME_AUDIO_ADAPT
combination of a node and an audio.convert.
Definition: names.h:99
SPA_NAME_API_ALSA_PCM_SINK
#define SPA_NAME_API_ALSA_PCM_SINK
an alsa Node interface for playback PCM
Definition: names.h:129
SPA_TYPE_INTERFACE_Node
#define SPA_TYPE_INTERFACE_Node
Definition: node.h:57
SPA_VERSION_NODE_CALLBACKS
#define SPA_VERSION_NODE_CALLBACKS
Definition: node.h:254
spa_node_port_set_io
#define spa_node_port_set_io(n,...)
Configure the given memory area with id on port_id.
Definition: node.h:751
spa_node_set_param
#define spa_node_set_param(n,...)
Set the configurable parameter in node.
Definition: node.h:727
spa_node_port_set_param
#define spa_node_port_set_param(n,...)
Set a parameter on port_id of node.
Definition: node.h:745
spa_node_port_enum_params_sync
static int spa_node_port_enum_params_sync(struct spa_node *node, enum spa_direction direction, uint32_t port_id, uint32_t id, uint32_t *index, const struct spa_pod *filter, struct spa_pod **param, struct spa_pod_builder *builder)
Definition: utils.h:98
spa_node_send_command
#define spa_node_send_command(n,...)
Send a command to a node.
Definition: node.h:733
SPA_IO_BUFFERS_INIT
#define SPA_IO_BUFFERS_INIT
Definition: io.h:114
SPA_NODE_COMMAND_INIT
#define SPA_NODE_COMMAND_INIT(id)
Definition: command.h:69
spa_node_port_use_buffers
#define spa_node_port_use_buffers(n,...)
Tell the port to use the given buffers.
Definition: node.h:748
spa_node_set_callbacks
#define spa_node_set_callbacks(n,...)
Set callbacks to on node.
Definition: node.h:718
SPA_IO_Buffers
@ SPA_IO_Buffers
area to exchange buffers, struct spa_io_buffers
Definition: io.h:58
SPA_NODE_COMMAND_Pause
@ SPA_NODE_COMMAND_Pause
pause a node.
Definition: command.h:48
SPA_NODE_COMMAND_Start
@ SPA_NODE_COMMAND_Start
start a node, this makes it start emitting scheduling events
Definition: command.h:50
spa_format_audio_raw_build
static struct spa_pod * spa_format_audio_raw_build(struct spa_pod_builder *builder, uint32_t id, struct spa_audio_info_raw *info)
Definition: format-utils.h:108
SPA_AUDIO_INFO_DSP_INIT
#define SPA_AUDIO_INFO_DSP_INIT(...)
Definition: raw.h:331
SPA_AUDIO_INFO_RAW_INIT
#define SPA_AUDIO_INFO_RAW_INIT(...)
Definition: raw.h:307
spa_format_audio_dsp_build
static struct spa_pod * spa_format_audio_dsp_build(struct spa_pod_builder *builder, uint32_t id, struct spa_audio_info_dsp *info)
Definition: format-utils.h:135
SPA_PROP_minLatency
@ SPA_PROP_minLatency
Definition: props.h:73
SPA_PROP_device
@ SPA_PROP_device
Definition: props.h:67
SPA_PROP_live
@ SPA_PROP_live
Definition: props.h:78
SPA_PROP_volume
@ SPA_PROP_volume
a volume (Float), 0.0 silence, 1.0 normal
Definition: props.h:86
SPA_PROP_frequency
@ SPA_PROP_frequency
Definition: props.h:85
SPA_PARAM_PORT_CONFIG_MODE_dsp
@ SPA_PARAM_PORT_CONFIG_MODE_dsp
dsp configuration, depending on the external format.
Definition: param.h:150
SPA_PARAM_Format
@ SPA_PARAM_Format
configured format as SPA_TYPE_OBJECT_Format
Definition: param.h:54
SPA_PARAM_PortConfig
@ SPA_PARAM_PortConfig
port configuration as SPA_TYPE_OBJECT_ParamPortConfig
Definition: param.h:61
SPA_PARAM_Props
@ SPA_PARAM_Props
properties as SPA_TYPE_OBJECT_Props
Definition: param.h:52
SPA_PARAM_Buffers
@ SPA_PARAM_Buffers
buffer configurations as SPA_TYPE_OBJECT_ParamBuffers
Definition: param.h:55
SPA_PARAM_PORT_CONFIG_mode
@ SPA_PARAM_PORT_CONFIG_mode
(Id enum spa_param_port_config_mode) mode
Definition: param.h:159
SPA_PARAM_PORT_CONFIG_format
@ SPA_PARAM_PORT_CONFIG_format
(Object) format filter
Definition: param.h:162
SPA_PARAM_PORT_CONFIG_direction
@ SPA_PARAM_PORT_CONFIG_direction
direction, input/output (Id enum spa_direction)
Definition: param.h:158
SPA_AUDIO_CHANNEL_MONO
@ SPA_AUDIO_CHANNEL_MONO
mono stream
Definition: raw.h:183
SPA_AUDIO_FORMAT_F32P
@ SPA_AUDIO_FORMAT_F32P
Definition: raw.h:98
SPA_AUDIO_FORMAT_S16
@ SPA_AUDIO_FORMAT_S16
Definition: raw.h:114
SPA_PARAM_BUFFERS_size
@ SPA_PARAM_BUFFERS_size
size of a data block memory (Int)
Definition: param.h:95
SPA_POD_String
#define SPA_POD_String(val)
Definition: vararg.h:114
SPA_POD_Bool
#define SPA_POD_Bool(val)
Definition: vararg.h:64
spa_pod_fixate
static int spa_pod_fixate(struct spa_pod *pod)
Definition: iter.h:447
SPA_POD_Id
#define SPA_POD_Id(val)
Definition: vararg.h:69
spa_pod_builder_add_object
#define spa_pod_builder_add_object(b, type, id,...)
Definition: builder.h:677
SPA_POD_Float
#define SPA_POD_Float(val)
Definition: vararg.h:96
spa_pod_builder_init
static void spa_pod_builder_init(struct spa_pod_builder *builder, void *data, uint32_t size)
Definition: builder.h:107
spa_pod_parse_object
#define spa_pod_parse_object(pod, type, id,...)
Definition: parser.h:585
SPA_POD_Int
#define SPA_POD_Int(val)
Definition: vararg.h:74
SPA_POD_Pod
#define SPA_POD_Pod(val)
Definition: vararg.h:148
spa_strerror
#define spa_strerror(err)
Definition: result.h:69
spa_streq
static bool spa_streq(const char *s1, const char *s2)
Definition: string.h:59
SPA_TYPE_INTERFACE_System
#define SPA_TYPE_INTERFACE_System
a collection of core system functions
Definition: system.h:59
SPA_TYPE_INTERFACE_DataSystem
#define SPA_TYPE_INTERFACE_DataSystem
Definition: system.h:61
SPA_TYPE_OBJECT_ParamPortConfig
@ SPA_TYPE_OBJECT_ParamPortConfig
Definition: type.h:101
SPA_TYPE_OBJECT_ParamBuffers
@ SPA_TYPE_OBJECT_ParamBuffers
Definition: type.h:97
SPA_TYPE_OBJECT_Props
@ SPA_TYPE_OBJECT_Props
Definition: type.h:95
spa_aprintf
#define spa_aprintf(_fmt,...)
Definition: defs.h:405
spa_zero
#define spa_zero(x)
Definition: defs.h:385
SPA_DIRECTION_INPUT
@ SPA_DIRECTION_INPUT
Definition: defs.h:91
SPA_DIRECTION_OUTPUT
@ SPA_DIRECTION_OUTPUT
Definition: defs.h:92
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
control.h
spa/control/control.h
node.h
spa/node/node.h
utils.h
loop.h
spa/support/loop.h
string.h
spa/utils/string.h
spa_audio_info_raw
Audio information description.
Definition: raw.h:298
spa_buffer
A Buffer.
Definition: buffer.h:105
spa_buffer::metas
struct spa_meta * metas
array of metadata
Definition: buffer.h:108
spa_chunk
Chunk of memory, can change for each buffer.
Definition: buffer.h:62
spa_command
Definition: command.h:49
spa_data
Data for a buffer this stays constant for a buffer.
Definition: buffer.h:77
spa_dict_item
Definition: dict.h:51
spa_dict
Definition: dict.h:59
spa_graph_node
Definition: graph.h:116
spa_graph_port
Definition: graph.h:141
spa_graph_state
Definition: graph.h:65
spa_graph
Definition: graph.h:99
spa_handle_factory
Definition: plugin.h:117
spa_handle_factory::version
uint32_t version
Definition: plugin.h:121
spa_handle
Definition: plugin.h:50
spa_io_buffers
IO area to exchange buffers.
Definition: io.h:98
spa_log
Definition: log.h:81
spa_loop_control
Definition: loop.h:62
spa_loop
Definition: loop.h:56
spa_meta_header
Describes essential buffer header metadata such as flags and timestamps.
Definition: meta.h:80
spa_meta
A metadata element.
Definition: meta.h:66
spa_meta::type
uint32_t type
metadata type, one of enum spa_meta_type
Definition: meta.h:67
spa_node_callbacks
Node callbacks.
Definition: node.h:252
spa_node
Definition: node.h:61
spa_pod_builder
Definition: builder.h:73
spa_pod_builder::data
void * data
Definition: builder.h:74
spa_pod_builder::state
struct spa_pod_builder_state state
Definition: builder.h:77
spa_pod
Definition: pod.h:63
spa_pod::size
uint32_t size
Definition: pod.h:64
spa_support
Extra supporting infrastructure passed to the init() function of a factory.
Definition: plugin.h:96
spa_system
Definition: system.h:65