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https://gitlab.freedesktop.org/pipewire/pipewire
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spa: add adapter-control example to test audioadapter nodes
Example executable that runs an output audioadapter using audiotestsrc as slave with an input audioadapter using alsa-pcm-sink as slave for easy testing.
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579
spa/examples/adapter-control.c
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579
spa/examples/adapter-control.c
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/* Spa
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*
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* Copyright © 2020 Collabora Ltd.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <math.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <dlfcn.h>
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#include <errno.h>
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#include <pthread.h>
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#include <poll.h>
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#include <spa/control/control.h>
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#include <spa/graph/graph.h>
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#include <spa/support/plugin.h>
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#include <spa/support/log-impl.h>
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#include <spa/support/loop.h>
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#include <spa/node/node.h>
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#include <spa/node/io.h>
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#include <spa/node/utils.h>
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#include <spa/param/param.h>
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#include <spa/param/props.h>
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#include <spa/param/audio/format-utils.h>
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#include <spa/utils/names.h>
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#include <spa/utils/result.h>
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static SPA_LOG_IMPL(default_log);
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#define MIN_LATENCY 1024
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struct buffer {
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struct spa_buffer buffer;
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struct spa_meta metas[1];
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struct spa_meta_header header;
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struct spa_data datas[1];
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struct spa_chunk chunks[1];
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};
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struct data {
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struct spa_log *log;
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struct spa_system *system;
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struct spa_loop *loop;
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struct spa_loop_control *control;
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struct spa_support support[5];
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uint32_t n_support;
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struct spa_graph graph;
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struct spa_graph_state graph_state;
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struct spa_graph_node graph_source_node;
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struct spa_graph_node graph_sink_node;
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struct spa_graph_state graph_source_state;
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struct spa_graph_state graph_sink_state;
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struct spa_graph_port graph_source_port_0;
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struct spa_graph_port graph_sink_port_0;
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struct spa_node *source_slave_node; // audiotestsrc
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struct spa_node *source_node; // adapter for audiotestsrc
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struct spa_node *sink_slave_node; // alsa-pcm-sink
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struct spa_node *sink_node; // adapter for alsa-pcm-sink
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struct spa_io_buffers source_sink_io[1];
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struct spa_buffer *source_buffers[1];
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struct buffer source_buffer[1];
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uint8_t ctrl[1024];
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bool running;
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pthread_t thread;
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};
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static int load_handle(struct data *data, struct spa_handle **handle, const char *lib, const char *name)
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{
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int res;
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void *hnd;
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spa_handle_factory_enum_func_t enum_func;
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uint32_t i;
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if ((hnd = dlopen(lib, RTLD_NOW)) == NULL) {
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printf("can't load %s: %s\n", lib, dlerror());
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return -errno;
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}
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if ((enum_func = dlsym(hnd, SPA_HANDLE_FACTORY_ENUM_FUNC_NAME)) == NULL) {
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printf("can't find enum function\n");
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return -errno;
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}
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for (i = 0;;) {
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const struct spa_handle_factory *factory;
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if ((res = enum_func(&factory, &i)) <= 0) {
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if (res != 0)
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printf("can't enumerate factories: %s\n", spa_strerror(res));
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break;
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}
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if (strcmp(factory->name, name))
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continue;
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*handle = calloc(1, spa_handle_factory_get_size(factory, NULL));
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if ((res = spa_handle_factory_init(factory, *handle,
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NULL, data->support,
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data->n_support)) < 0) {
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printf("can't make factory instance: %d\n", res);
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return res;
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}
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return 0;
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}
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return -EBADF;
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}
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int init_data(struct data *data)
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{
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int res;
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const char *str;
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struct spa_handle *handle = NULL;
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void *iface;
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/* init the graph */
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spa_graph_init(&data->graph, &data->graph_state);
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/* set the default log */
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data->log = &default_log.log;
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data->support[data->n_support++] = SPA_SUPPORT_INIT(SPA_TYPE_INTERFACE_Log, data->log);
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/* load and set support system */
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if ((res = load_handle(data, &handle,
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"build/spa/plugins/support/libspa-support.so",
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SPA_NAME_SUPPORT_SYSTEM)) < 0)
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return res;
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if ((res = spa_handle_get_interface(handle, SPA_TYPE_INTERFACE_System, &iface)) < 0) {
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printf("can't get System interface %d\n", res);
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return res;
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}
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data->system = iface;
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data->support[data->n_support++] = SPA_SUPPORT_INIT(SPA_TYPE_INTERFACE_System, data->system);
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data->support[data->n_support++] = SPA_SUPPORT_INIT(SPA_TYPE_INTERFACE_DataSystem, data->system);
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/* load and set support loop and loop control */
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if ((res = load_handle(data, &handle,
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"build/spa/plugins/support/libspa-support.so",
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SPA_NAME_SUPPORT_LOOP)) < 0)
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return res;
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if ((res = spa_handle_get_interface(handle, SPA_TYPE_INTERFACE_Loop, &iface)) < 0) {
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printf("can't get interface %d\n", res);
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return res;
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}
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data->loop = iface;
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data->support[data->n_support++] = SPA_SUPPORT_INIT(SPA_TYPE_INTERFACE_Loop, data->loop);
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data->support[data->n_support++] = SPA_SUPPORT_INIT(SPA_TYPE_INTERFACE_DataLoop, data->loop);
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if ((res = spa_handle_get_interface(handle, SPA_TYPE_INTERFACE_LoopControl, &iface)) < 0) {
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printf("can't get interface %d\n", res);
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return res;
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}
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data->control = iface;
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if ((str = getenv("SPA_DEBUG")))
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data->log->level = atoi(str);
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return 0;
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}
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static int make_node(struct data *data, struct spa_node **node, const char *lib,
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const char *name, const struct spa_dict *props)
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{
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struct spa_handle *handle;
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int res = 0;
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void *hnd;
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spa_handle_factory_enum_func_t enum_func;
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uint32_t i;
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if ((hnd = dlopen(lib, RTLD_NOW)) == NULL) {
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printf("can't load %s: %s\n", lib, dlerror());
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return -errno;
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}
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if ((enum_func = dlsym(hnd, SPA_HANDLE_FACTORY_ENUM_FUNC_NAME)) == NULL) {
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printf("can't find enum function\n");
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return -errno;
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}
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for (i = 0;;) {
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const struct spa_handle_factory *factory;
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void *iface;
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if ((res = enum_func(&factory, &i)) <= 0) {
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if (res != 0)
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printf("can't enumerate factories: %s\n", spa_strerror(res));
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break;
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}
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if (strcmp(factory->name, name))
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continue;
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handle = calloc(1, spa_handle_factory_get_size(factory, NULL));
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if ((res =
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spa_handle_factory_init(factory, handle, props, data->support,
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data->n_support)) < 0) {
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printf("can't make factory instance: %d\n", res);
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return res;
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}
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if ((res = spa_handle_get_interface(handle, SPA_TYPE_INTERFACE_Node, &iface)) < 0) {
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printf("can't get interface %d\n", res);
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return res;
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}
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*node = iface;
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return 0;
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}
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return -EBADF;
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}
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static int on_sink_node_ready(void *_data, int status)
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{
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struct data *data = _data;
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spa_graph_node_process(&data->graph_source_node);
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spa_graph_node_process(&data->graph_sink_node);
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return 0;
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}
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static int
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on_sink_node_reuse_buffer(void *_data, uint32_t port_id, uint32_t buffer_id)
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{
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struct data *data = _data;
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printf ("reuse_buffer: port_id=%d\n", port_id);
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data->source_sink_io[0].buffer_id = buffer_id;
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return 0;
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}
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static const struct spa_node_callbacks sink_node_callbacks = {
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SPA_VERSION_NODE_CALLBACKS,
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.ready = on_sink_node_ready,
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.reuse_buffer = on_sink_node_reuse_buffer
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};
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static int make_nodes(struct data *data, const char *device)
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{
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int res = 0;
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struct spa_pod *props;
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struct spa_pod_builder b = { 0 };
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uint8_t buffer[1024];
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char value[32];
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struct spa_dict_item items[1];
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struct spa_audio_info_raw info;
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struct spa_pod *param;
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/* make the source node (audiotestsrc) */
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if ((res = make_node(data, &data->source_slave_node,
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"build/spa/plugins/audiotestsrc/libspa-audiotestsrc.so",
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"audiotestsrc",
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NULL)) < 0) {
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printf("can't create source slave node (audiotestsrc): %d\n", res);
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return res;
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}
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/* set the format on the source */
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spa_pod_builder_init(&b, buffer, sizeof(buffer));
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param = spa_format_audio_raw_build(&b, 0,
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&SPA_AUDIO_INFO_RAW_INIT(
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.format = SPA_AUDIO_FORMAT_S16,
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.rate = 48000,
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.channels = 2 ));
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if ((res = spa_node_port_set_param(data->source_slave_node,
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SPA_DIRECTION_OUTPUT, 0,
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SPA_PARAM_Format, 0, param)) < 0) {
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printf("can't set format on slave node (audiotestsrc): %d\n", res);
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return res;
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}
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/* make the sink adapter node */
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snprintf(value, sizeof(value), "pointer:%p", data->source_slave_node);
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items[0] = SPA_DICT_ITEM_INIT("audio.adapt.slave", value);
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if ((res = make_node(data, &data->source_node,
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"build/spa/plugins/audioconvert/libspa-audioconvert.so",
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SPA_NAME_AUDIO_ADAPT,
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&SPA_DICT_INIT(items, 1))) < 0) {
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printf("can't create source adapter node: %d\n", res);
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return res;
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}
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/* setup the source node props */
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spa_pod_builder_init(&b, buffer, sizeof(buffer));
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props = spa_pod_builder_add_object(&b,
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SPA_TYPE_OBJECT_Props, 0,
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SPA_PROP_frequency, SPA_POD_Float(600.0),
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SPA_PROP_volume, SPA_POD_Float(0.5),
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SPA_PROP_live, SPA_POD_Bool(false));
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if ((res = spa_node_set_param(data->source_node, SPA_PARAM_Props, 0, props)) < 0) {
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printf("can't setup source slave node %d\n", res);
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return res;
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}
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/* setup the source node port config */
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spa_zero(info);
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info.format = SPA_AUDIO_FORMAT_F32P;
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info.channels = 1;
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info.rate = 48000;
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info.position[0] = SPA_AUDIO_CHANNEL_MONO;
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spa_pod_builder_init(&b, buffer, sizeof(buffer));
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param = spa_format_audio_raw_build(&b, SPA_PARAM_Format, &info);
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param = spa_pod_builder_add_object(&b,
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SPA_TYPE_OBJECT_ParamPortConfig, SPA_PARAM_PortConfig,
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SPA_PARAM_PORT_CONFIG_direction, SPA_POD_Id(SPA_DIRECTION_OUTPUT),
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SPA_PARAM_PORT_CONFIG_mode, SPA_POD_Id(SPA_PARAM_PORT_CONFIG_MODE_dsp),
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SPA_PARAM_PORT_CONFIG_format, SPA_POD_Pod(param));
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if ((res = spa_node_set_param(data->source_node, SPA_PARAM_PortConfig, 0, param) < 0)) {
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printf("can't setup source node %d\n", res);
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return res;
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}
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/* make the sink salve node (alsa-pcm-sink) */
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if ((res = make_node(data, &data->sink_slave_node,
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"build/spa/plugins/alsa/libspa-alsa.so",
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SPA_NAME_API_ALSA_PCM_SINK,
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NULL)) < 0) {
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printf("can't create sink slave node (alsa-pcm-sink): %d\n", res);
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return res;
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}
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/* make the sink adapter node */
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snprintf(value, sizeof(value), "pointer:%p", data->sink_slave_node);
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items[0] = SPA_DICT_ITEM_INIT("audio.adapt.slave", value);
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if ((res = make_node(data, &data->sink_node,
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"build/spa/plugins/audioconvert/libspa-audioconvert.so",
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SPA_NAME_AUDIO_ADAPT,
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&SPA_DICT_INIT(items, 1))) < 0) {
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printf("can't create sink adapter node: %d\n", res);
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return res;
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}
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/* add sink slave node callbacks */
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spa_node_set_callbacks(data->sink_node, &sink_node_callbacks, data);
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/* setup the sink node porps */
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spa_pod_builder_init(&b, buffer, sizeof(buffer));
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props = spa_pod_builder_add_object(&b,
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SPA_TYPE_OBJECT_Props, 0,
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SPA_PROP_device, SPA_POD_String(device ? device : "hw:0"),
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SPA_PROP_minLatency, SPA_POD_Int(MIN_LATENCY));
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if ((res = spa_node_set_param(data->sink_slave_node, SPA_PARAM_Props, 0, props)) < 0) {
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printf("can't setup sink slave node %d\n", res);
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return res;
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}
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/* setup the sink node port config */
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spa_zero(info);
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info.format = SPA_AUDIO_FORMAT_F32P;
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info.channels = 1;
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info.rate = 48000;
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info.position[0] = SPA_AUDIO_CHANNEL_MONO;
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spa_pod_builder_init(&b, buffer, sizeof(buffer));
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param = spa_format_audio_raw_build(&b, SPA_PARAM_Format, &info);
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param = spa_pod_builder_add_object(&b,
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SPA_TYPE_OBJECT_ParamPortConfig, SPA_PARAM_PortConfig,
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SPA_PARAM_PORT_CONFIG_direction, SPA_POD_Id(SPA_DIRECTION_INPUT),
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SPA_PARAM_PORT_CONFIG_mode, SPA_POD_Id(SPA_PARAM_PORT_CONFIG_MODE_dsp),
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SPA_PARAM_PORT_CONFIG_format, SPA_POD_Pod(param));
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if ((res = spa_node_set_param(data->sink_node, SPA_PARAM_PortConfig, 0, param) < 0)) {
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printf("can't setup sink node %d\n", res);
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return res;
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}
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/* set io buffers on source and sink nodes */
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data->source_sink_io[0] = SPA_IO_BUFFERS_INIT;
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if ((res = spa_node_port_set_io(data->source_node,
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SPA_DIRECTION_OUTPUT, 0,
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SPA_IO_Buffers,
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&data->source_sink_io[0], sizeof(data->source_sink_io[0]))) < 0) {
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printf("can't set io buffers on port 0 of source node: %d\n", res);
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return res;
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}
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if ((res = spa_node_port_set_io(data->sink_node,
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SPA_DIRECTION_INPUT, 0,
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SPA_IO_Buffers,
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&data->source_sink_io[0], sizeof(data->source_sink_io[0]))) < 0) {
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printf("can't set io buffers on port 0 of sink node: %d\n", res);
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return res;
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}
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/* add source node to the graph */
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spa_graph_node_init(&data->graph_source_node, &data->graph_source_state);
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spa_graph_node_set_callbacks(&data->graph_source_node, &spa_graph_node_impl_default, data->source_node);
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spa_graph_node_add(&data->graph, &data->graph_source_node);
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spa_graph_port_init(&data->graph_source_port_0, SPA_DIRECTION_OUTPUT, 0, 0);
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spa_graph_port_add(&data->graph_source_node, &data->graph_source_port_0);
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/* add sink node to the graph */
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spa_graph_node_init(&data->graph_sink_node, &data->graph_sink_state);
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spa_graph_node_set_callbacks(&data->graph_sink_node, &spa_graph_node_impl_default, data->sink_node);
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spa_graph_node_add(&data->graph, &data->graph_sink_node);
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spa_graph_port_init(&data->graph_sink_port_0, SPA_DIRECTION_INPUT, 0, 0);
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spa_graph_port_add(&data->graph_sink_node, &data->graph_sink_port_0);
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/* 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 slave node buffer size */
|
||||
spa_pod_builder_init(&b, buffer, sizeof(buffer));
|
||||
if (spa_node_port_enum_params_sync(data->source_slave_node,
|
||||
SPA_DIRECTION_OUTPUT, 0,
|
||||
SPA_PARAM_Buffers, &state, filter, ¶m, &b) != 1)
|
||||
return res;
|
||||
spa_pod_fixate(param);
|
||||
if (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 slave) */
|
||||
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);
|
||||
}
|
|
@ -9,3 +9,8 @@ executable('example-control', 'example-control.c',
|
|||
include_directories : [spa_inc ],
|
||||
dependencies : [dl_lib, pthread_lib, mathlib],
|
||||
install : false)
|
||||
|
||||
executable('adapter-control', 'adapter-control.c',
|
||||
include_directories : [spa_inc ],
|
||||
dependencies : [dl_lib, pthread_lib, mathlib],
|
||||
install : false)
|
||||
|
|
Loading…
Reference in a new issue