Running audioadapter nodes.
Runs an output audioadapter using audiotestsrc as follower with an input audioadapter using alsa-pcm-sink as follower for easy testing.
#include "config.h"
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <dlfcn.h>
#include <errno.h>
#include <pthread.h>
#include <poll.h>
#define MIN_LATENCY 1024
#define CONTROL_BUFFER_SIZE 32768
struct buffer {
};
struct data {
const char *plugin_dir;
uint32_t n_support;
struct buffer source_buffer[1];
struct buffer control_buffer[1];
int buffer_count;
bool start_fade_in;
double volume_accum;
uint32_t volume_offs;
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;
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;
}
printf("can't find enum function\n");
res = -ENOENT;
goto exit_cleanup;
}
for (i = 0;;) {
if ((res = enum_func(&factory, &i)) <= 0) {
if (res != 0)
printf(
"can't enumerate factories: %s\n",
spa_strerror(res));
break;
}
continue;
continue;
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;
void *iface;
if ((str = getenv("SPA_PLUGIN_DIR")) == NULL)
str = PLUGINDIR;
data->plugin_dir = str;
data->start_fade_in = true;
data->volume_accum = 0.0;
data->volume_offs = 0;
data->log = &default_log.log;
if ((res = load_handle(data, &handle,
"support/libspa-support.so",
return res;
printf("can't get System interface %d\n", res);
return res;
}
data->system = iface;
if ((res = load_handle(data, &handle,
"support/libspa-support.so",
return res;
printf("can't get interface %d\n", res);
return res;
}
data->loop = iface;
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)
{
int res = 0;
void *hnd = NULL;
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;
}
printf("can't find enum function\n");
res = -ENOENT;
goto exit_cleanup;
}
for (i = 0;;) {
void *iface;
if ((res = enum_func(&factory, &i)) <= 0) {
if (res != 0)
printf(
"can't enumerate factories: %s\n",
spa_strerror(res));
break;
}
continue;
continue;
if ((res =
data->n_support)) < 0) {
printf("can't make factory instance: %d\n", res);
goto exit_cleanup;
}
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 fade_in(struct data *data)
{
void *buffer = data->control_buffer->datas[0].data;
uint32_t buffer_size = data->control_buffer->datas[0].maxsize;
data->control_buffer->datas[0].chunk[0].size = buffer_size;
printf ("fading in\n");
data->volume_offs = 0;
do {
data->volume_accum += 0.003;
data->volume_offs += 200;
} while (data->volume_accum < 1.0);
return 0;
}
static int fade_out(struct data *data)
{
void *buffer = data->control_buffer->datas[0].data;
uint32_t buffer_size = data->control_buffer->datas[0].maxsize;
data->control_buffer->datas[0].chunk[0].size = buffer_size;
printf ("fading out\n");
data->volume_offs = 200;
do {
data->volume_accum -= 0.003;
data->volume_offs += 200;
} while (data->volume_accum > 0.0);
return 0;
}
static void do_fade(struct data *data)
{
switch (data->control_io.status) {
break;
default:
return;
}
if (data->start_fade_in)
fade_in(data);
else
fade_out(data);
data->control_io.buffer_id = 0;
data->start_fade_in = !data->start_fade_in;
}
static int on_sink_node_ready(void *_data, int status)
{
struct data *data = _data;
if (data->buffer_count == 0)
do_fade(data);
data->buffer_count++;
if (data->buffer_count > 64)
data->buffer_count = 0;
return 0;
}
.ready = on_sink_node_ready,
};
static int make_nodes(struct data *data, const char *device)
{
int res = 0;
uint8_t buffer[1024];
char value[32];
if ((res = make_node(data, &data->source_follower_node,
"audiotestsrc/libspa-audiotestsrc.so",
"audiotestsrc",
printf("can't create source follower node (audiotestsrc): %d\n", res);
return res;
}
.rate = 48000,
.channels = 2 ));
printf("can't set format on follower node (audiotestsrc): %d\n", res);
return res;
}
snprintf(value, sizeof(value), "pointer:%p", data->source_follower_node);
if ((res = make_node(data, &data->source_node,
"audioconvert/libspa-audioconvert.so",
printf("can't create source adapter node: %d\n", res);
return res;
}
printf("can't setup source follower node %d\n", res);
return res;
}
info.channels = 1;
info.rate = 48000;
printf("can't setup source node %d\n", res);
return res;
}
if ((res = make_node(data, &data->sink_follower_node,
"alsa/libspa-alsa.so",
printf("can't create sink follower node (alsa-pcm-sink): %d\n", res);
return res;
}
snprintf(value, sizeof(value), "pointer:%p", data->sink_follower_node);
if ((res = make_node(data, &data->sink_node,
"audioconvert/libspa-audioconvert.so",
printf("can't create sink adapter node: %d\n", res);
return res;
}
printf("can't setup sink follower node %d\n", res);
return res;
}
info.channels = 1;
info.rate = 48000;
printf("can't setup sink node %d\n", res);
return res;
}
&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;
}
&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;
}
data->position.clock.duration = 1024;
&data->position, sizeof(data->position))) < 0) {
printf("can't set io position on source node: %d\n", res);
return res;
}
&data->position, sizeof(data->position))) < 0) {
printf("can't set io position on sink node: %d\n", res);
return res;
}
&data->position.clock, sizeof(data->position.clock))) < 0) {
printf("can't set io clock on source node: %d\n", res);
return res;
}
&data->position.clock, sizeof(data->position.clock))) < 0) {
printf("can't set io clock on sink node: %d\n", res);
return res;
}
&data->control_io, sizeof(data->control_io))) < 0) {
printf("can't set io buffers on control port 1 of sink node\n");
return res;
}
return res;
}
static void
init_buffer(
struct data *data,
struct spa_buffer **bufs,
struct buffer *ba,
int n_buffers,
{
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].data = &b->header;
b->metas[0].size = sizeof(b->header);
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;
uint8_t buffer[4096];
size_t buffer_size = 1024;
return res;
return res;
return res;
return res ? res : -ENOTSUP;
return res;
init_buffer(
data,
data->source_buffers,
data->source_buffer, 1, buffer_size);
return res;
return res;
init_buffer(
data,
data->control_buffers,
data->control_buffer, 1, CONTROL_BUFFER_SIZE);
return res;
return 0;
}
static void *loop(void *user_data)
{
struct data *data = user_data;
printf("enter thread\n");
while (data->running) {
}
printf("leave thread\n");
return NULL;
return NULL;
}
static void run_async_sink(struct data *data)
{
int res, err;
printf("got error %d\n", res);
printf("got error %d\n", res);
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);
}
printf("got error %d\n", res);
printf("got error %d\n", res);
}
int main(int argc, char *argv[])
{
struct data data = { 0 };
int res = 0;
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;
}
run_async_sink(&data);
}
@ SPA_META_Header
struct spa_meta_header
Definition: meta.h:47
@ SPA_DATA_MemPtr
pointer to memory, the data field in struct spa_data is set.
Definition: buffer.h:52
@ SPA_CONTROL_Properties
data contains a SPA_TYPE_OBJECT_Props
Definition: control.h:52
#define SPA_DICT_ITEM_INIT(key, value)
Definition: dict.h:57
#define SPA_DICT_INIT(items, n_items)
Definition: dict.h:68
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
static const struct spa_graph_node_callbacks spa_graph_node_impl_default
Definition: graph.h:361
static void spa_graph_init(struct spa_graph *graph, struct spa_graph_state *state)
Definition: graph.h:204
static void spa_graph_node_add(struct spa_graph *graph, struct spa_graph_node *node)
Definition: graph.h:276
static void spa_graph_node_init(struct spa_graph_node *node, struct spa_graph_state *state)
Definition: graph.h:231
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
static void spa_graph_port_add(struct spa_graph_node *node, struct spa_graph_port *port)
Definition: graph.h:310
static void spa_graph_port_link(struct spa_graph_port *out, struct spa_graph_port *in)
Definition: graph.h:325
#define spa_graph_node_process(n)
Definition: graph.h:138
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
#define SPA_HANDLE_FACTORY_ENUM_FUNC_NAME
Definition: plugin.h:206
#define SPA_SUPPORT_INIT(type, data)
Definition: plugin.h:115
#define spa_handle_factory_init(h,...)
Definition: plugin.h:190
#define spa_handle_get_interface(h,...)
Definition: plugin.h:80
#define spa_handle_factory_get_size(h,...)
Definition: plugin.h:189
#define SPA_LOG_IMPL(name)
Definition: log-impl.h:138
#define SPA_TYPE_INTERFACE_Log
The Log interface.
Definition: log.h:78
#define spa_loop_control_enter(l)
Enter a loop.
Definition: loop.h:255
#define spa_loop_control_leave(l)
Leave a loop.
Definition: loop.h:258
#define spa_loop_control_iterate(l,...)
Perform one iteration of the loop.
Definition: loop.h:261
#define SPA_TYPE_INTERFACE_DataLoop
Definition: loop.h:53
#define SPA_TYPE_INTERFACE_Loop
Definition: loop.h:51
#define SPA_TYPE_INTERFACE_LoopControl
Definition: loop.h:59
#define SPA_NAME_SUPPORT_LOOP
A Loop/LoopControl/LoopUtils interface.
Definition: names.h:54
#define SPA_NAME_SUPPORT_SYSTEM
A System interface.
Definition: names.h:57
#define SPA_NAME_AUDIO_ADAPT
combination of a node and an audio.convert.
Definition: names.h:99
#define SPA_NAME_API_ALSA_PCM_SINK
an alsa Node interface for playback PCM
Definition: names.h:129
#define spa_node_set_io(n,...)
Configure the given memory area with id on node.
Definition: node.h:736
#define SPA_STATUS_OK
Definition: io.h:100
#define SPA_STATUS_HAVE_DATA
Definition: io.h:104
#define SPA_TYPE_INTERFACE_Node
Definition: node.h:57
#define SPA_VERSION_NODE_CALLBACKS
Definition: node.h:254
#define SPA_STATUS_NEED_DATA
Definition: io.h:102
#define spa_node_port_set_io(n,...)
Configure the given memory area with id on port_id.
Definition: node.h:757
#define SPA_STATUS_STOPPED
Definition: io.h:106
#define spa_node_set_param(n,...)
Set the configurable parameter in node.
Definition: node.h:733
#define spa_node_port_set_param(n,...)
Set a parameter on port_id of node.
Definition: node.h:751
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
#define spa_node_send_command(n,...)
Send a command to a node.
Definition: node.h:739
#define SPA_IO_BUFFERS_INIT
Definition: io.h:114
#define SPA_NODE_COMMAND_INIT(id)
Definition: command.h:69
#define spa_node_port_use_buffers(n,...)
Tell the port to use the given buffers.
Definition: node.h:754
#define spa_node_set_callbacks(n,...)
Set callbacks to on node.
Definition: node.h:724
@ SPA_IO_Clock
area to update clock information, struct spa_io_clock
Definition: io.h:60
@ SPA_IO_Position
position information in the graph, struct spa_io_position
Definition: io.h:64
@ SPA_IO_Buffers
area to exchange buffers, struct spa_io_buffers
Definition: io.h:58
@ SPA_NODE_COMMAND_Pause
pause a node.
Definition: command.h:48
@ SPA_NODE_COMMAND_Start
start a node, this makes it start emitting scheduling events
Definition: command.h:50
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
#define SPA_AUDIO_INFO_DSP_INIT(...)
Definition: raw.h:331
#define SPA_AUDIO_INFO_RAW_INIT(...)
Definition: raw.h:307
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
Definition: props.h:73
@ SPA_PROP_device
Definition: props.h:67
@ SPA_PROP_live
Definition: props.h:78
@ SPA_PROP_volume
a volume (Float), 0.0 silence, 1.0 normal
Definition: props.h:87
@ SPA_PROP_frequency
Definition: props.h:86
@ SPA_PARAM_PORT_CONFIG_MODE_dsp
dsp configuration, depending on the external format.
Definition: param.h:152
@ SPA_MEDIA_TYPE_application
Definition: format.h:52
@ SPA_PARAM_Format
configured format as SPA_TYPE_OBJECT_Format
Definition: param.h:54
@ SPA_PARAM_PortConfig
port configuration as SPA_TYPE_OBJECT_ParamPortConfig
Definition: param.h:61
@ SPA_PARAM_Props
properties as SPA_TYPE_OBJECT_Props
Definition: param.h:52
@ SPA_PARAM_Buffers
buffer configurations as SPA_TYPE_OBJECT_ParamBuffers
Definition: param.h:55
@ SPA_PARAM_PORT_CONFIG_mode
(Id enum spa_param_port_config_mode) mode
Definition: param.h:161
@ SPA_PARAM_PORT_CONFIG_format
(Object) format filter
Definition: param.h:164
@ SPA_PARAM_PORT_CONFIG_control
(Bool) enable control ports
Definition: param.h:163
@ SPA_PARAM_PORT_CONFIG_direction
direction, input/output (Id enum spa_direction)
Definition: param.h:160
@ SPA_AUDIO_CHANNEL_MONO
mono stream
Definition: raw.h:183
@ SPA_FORMAT_mediaType
media type (Id enum spa_media_type)
Definition: format.h:109
@ SPA_FORMAT_mediaSubtype
media subtype (Id enum spa_media_subtype)
Definition: format.h:110
@ SPA_MEDIA_SUBTYPE_control
control stream, data contains spa_pod_sequence with control info.
Definition: format.h:101
@ SPA_AUDIO_FORMAT_F32P
Definition: raw.h:98
@ SPA_AUDIO_FORMAT_S16
Definition: raw.h:114
@ SPA_PARAM_BUFFERS_size
size of a data block memory (Int)
Definition: param.h:97
#define SPA_POD_String(val)
Definition: vararg.h:114
#define SPA_POD_Bool(val)
Definition: vararg.h:64
static int spa_pod_fixate(struct spa_pod *pod)
Definition: iter.h:447
static void * spa_pod_builder_pop(struct spa_pod_builder *builder, struct spa_pod_frame *frame)
Definition: builder.h:188
static int spa_pod_builder_push_sequence(struct spa_pod_builder *builder, struct spa_pod_frame *frame, uint32_t unit)
Definition: builder.h:480
#define SPA_POD_Id(val)
Definition: vararg.h:69
static uint32_t spa_pod_builder_control(struct spa_pod_builder *builder, uint32_t offset, uint32_t type)
Definition: builder.h:491
#define spa_pod_builder_add_object(b, type, id,...)
Definition: builder.h:679
#define SPA_POD_Float(val)
Definition: vararg.h:96
static void spa_pod_builder_init(struct spa_pod_builder *builder, void *data, uint32_t size)
Definition: builder.h:107
#define spa_pod_parse_object(pod, type, id,...)
Definition: parser.h:596
#define SPA_POD_Int(val)
Definition: vararg.h:74
#define SPA_POD_Pod(val)
Definition: vararg.h:148
#define spa_strerror(err)
Definition: result.h:69
static bool spa_streq(const char *s1, const char *s2)
Definition: string.h:61
#define SPA_TYPE_INTERFACE_System
a collection of core system functions
Definition: system.h:59
#define SPA_TYPE_INTERFACE_DataSystem
Definition: system.h:61
@ SPA_TYPE_OBJECT_ParamPortConfig
Definition: type.h:101
@ SPA_TYPE_OBJECT_ParamBuffers
Definition: type.h:97
@ SPA_TYPE_OBJECT_Props
Definition: type.h:95
@ SPA_TYPE_OBJECT_Format
Definition: type.h:96
#define spa_aprintf(_fmt,...)
Definition: defs.h:445
#define spa_zero(x)
Definition: defs.h:425
#define SPA_FRACTION(num, denom)
Definition: defs.h:138
@ SPA_DIRECTION_INPUT
Definition: defs.h:109
@ SPA_DIRECTION_OUTPUT
Definition: defs.h:110
Audio information description.
Definition: raw.h:298
A Buffer.
Definition: buffer.h:109
struct spa_meta * metas
array of metadata
Definition: buffer.h:112
Chunk of memory, can change for each buffer.
Definition: buffer.h:62
Data for a buffer this stays constant for a buffer.
Definition: buffer.h:81
uint32_t version
Definition: plugin.h:121
IO area to exchange buffers.
Definition: io.h:98
The position information adds extra meaning to the raw clock times.
Definition: io.h:293
Node callbacks.
Definition: node.h:252
void * data
Definition: builder.h:74
struct spa_pod_builder_state state
Definition: builder.h:77
uint32_t size
Definition: pod.h:64
Extra supporting infrastructure passed to the init() function of a factory.
Definition: plugin.h:96