mirror of
https://gitlab.freedesktop.org/pipewire/pipewire
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98a0e54d5f
Include examples to the documentation, using Doxygen's example system.
561 lines
15 KiB
C
561 lines
15 KiB
C
/* Spa
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*
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* Copyright © 2018 Wim Taymans
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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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/*
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[title]
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[title]
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*/
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#include "config.h"
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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/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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#include <spa/utils/string.h>
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#define M_PI_M2 ( M_PI + M_PI )
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static SPA_LOG_IMPL(default_log);
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#define spa_debug(f,...) spa_log_trace(&default_log.log, f, __VA_ARGS__)
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#include <spa/graph/graph.h>
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#include <spa/debug/pod.h>
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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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const char *plugin_dir;
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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 source_node;
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struct spa_graph_state source_state;
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struct spa_graph_port source_out;
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struct spa_graph_port sink_in;
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struct spa_graph_node sink_node;
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struct spa_graph_state sink_state;
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struct spa_node *sink;
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struct spa_node *source;
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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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double freq_accum;
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double volume_accum;
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bool running;
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pthread_t thread;
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};
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#define MIN_LATENCY 1024
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#define BUFFER_SIZE 4096
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static void
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init_buffer(struct data *data, struct spa_buffer **bufs, struct buffer *ba, int n_buffers,
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size_t size)
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{
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int i;
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for (i = 0; i < n_buffers; i++) {
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struct buffer *b = &ba[i];
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bufs[i] = &b->buffer;
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b->buffer.metas = b->metas;
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b->buffer.n_metas = 1;
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b->buffer.datas = b->datas;
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b->buffer.n_datas = 1;
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b->header.flags = 0;
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b->header.seq = 0;
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b->header.pts = 0;
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b->header.dts_offset = 0;
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b->metas[0].type = SPA_META_Header;
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b->metas[0].data = &b->header;
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b->metas[0].size = sizeof(b->header);
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b->datas[0].type = SPA_DATA_MemPtr;
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b->datas[0].flags = 0;
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b->datas[0].fd = -1;
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b->datas[0].mapoffset = 0;
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b->datas[0].maxsize = size;
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b->datas[0].data = malloc(size);
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b->datas[0].chunk = &b->chunks[0];
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b->datas[0].chunk->offset = 0;
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b->datas[0].chunk->size = 0;
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b->datas[0].chunk->stride = 0;
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}
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}
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static int make_node(struct data *data, struct spa_node **node, const char *lib, const char *name)
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{
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struct spa_handle *handle;
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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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char *path;
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if ((path = spa_aprintf("%s/%s", data->plugin_dir, lib)) == NULL) {
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return -ENOMEM;
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}
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if ((hnd = dlopen(path, RTLD_NOW)) == NULL) {
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printf("can't load %s: %s\n", lib, dlerror());
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free(path);
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return -ENOENT;
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}
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free(path);
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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 -ENOENT;
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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 (factory->version < 1)
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continue;
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if (!spa_streq(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, 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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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 void update_props(struct data *data)
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{
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struct spa_pod_builder b;
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struct spa_pod *pod;
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struct spa_pod_frame f[2];
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spa_pod_builder_init(&b, data->ctrl, sizeof(data->ctrl));
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#if 0
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spa_pod_builder_push_sequence(&b, &f[0], 0);
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spa_pod_builder_control(&b, 0, SPA_CONTROL_Properties);
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spa_pod_builder_push_object(&b, &f[1], SPA_TYPE_OBJECT_Props, 0);
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spa_pod_builder_prop(&b, SPA_PROP_frequency, 0);
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spa_pod_builder_float(&b, ((sin(data->freq_accum) + 1.0) * 200.0) + 440.0);
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spa_pod_builder_prop(&b, SPA_PROP_volume, 0);
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spa_pod_builder_float(&b, (sin(data->volume_accum) / 2.0) + 0.5);
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spa_pod_builder_pop(&b, &f[1]);
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pod = spa_pod_builder_pop(&b, &f[0]);
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#else
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spa_pod_builder_push_sequence(&b, &f[0], 0);
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spa_pod_builder_control(&b, 0, SPA_CONTROL_Properties);
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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(((sin(data->freq_accum) + 1.0) * 200.0) + 440.0),
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SPA_PROP_volume, SPA_POD_Float((sin(data->volume_accum) / 2.0) + 0.5));
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pod = spa_pod_builder_pop(&b, &f[0]);
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#endif
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spa_debug_pod(0, NULL, pod);
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data->freq_accum += M_PI_M2 / 880.0;
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if (data->freq_accum >= M_PI_M2)
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data->freq_accum -= M_PI_M2;
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data->volume_accum += M_PI_M2 / 2000.0;
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if (data->volume_accum >= M_PI_M2)
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data->volume_accum -= M_PI_M2;
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}
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static int on_sink_ready(void *_data, int status)
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{
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struct data *data = _data;
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update_props(data);
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spa_graph_node_process(&data->source_node);
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spa_graph_node_process(&data->sink_node);
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return 0;
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}
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static int
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on_sink_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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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_callbacks = {
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SPA_VERSION_NODE_CALLBACKS,
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.ready = on_sink_ready,
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.reuse_buffer = on_sink_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;
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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[512];
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//uint32_t idx;
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if ((res = make_node(data, &data->sink,
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"alsa/libspa-alsa.so",
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SPA_NAME_API_ALSA_PCM_SINK)) < 0) {
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printf("can't create alsa-sink: %d\n", res);
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return res;
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}
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spa_node_set_callbacks(data->sink, &sink_callbacks, data);
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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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spa_debug_pod(0, NULL, props);
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if ((res = spa_node_set_param(data->sink, SPA_PARAM_Props, 0, props)) < 0)
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printf("got set_props error %d\n", res);
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if ((res = make_node(data, &data->source,
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"audiotestsrc/libspa-audiotestsrc.so",
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"audiotestsrc")) < 0) {
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printf("can't create audiotestsrc: %d\n", res);
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return res;
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}
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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, SPA_PARAM_Props, 0, props)) < 0)
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printf("got set_props error %d\n", res);
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if ((res = spa_node_port_set_io(data->source,
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SPA_DIRECTION_OUTPUT, 0,
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SPA_IO_Control,
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&data->ctrl, sizeof(data->ctrl))) < 0) {
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printf("can't set_io freq: %d\n", res);
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return res;
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}
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data->source_sink_io[0] = SPA_IO_BUFFERS_INIT;
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spa_node_port_set_io(data->source,
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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]));
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spa_node_port_set_io(data->sink,
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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]));
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spa_graph_node_init(&data->source_node, &data->source_state);
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spa_graph_node_set_callbacks(&data->source_node, &spa_graph_node_impl_default, data->source);
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spa_graph_node_add(&data->graph, &data->source_node);
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spa_graph_port_init(&data->source_out, SPA_DIRECTION_OUTPUT, 0, 0);
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spa_graph_port_add(&data->source_node, &data->source_out);
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spa_graph_node_init(&data->sink_node, &data->sink_state);
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spa_graph_node_set_callbacks(&data->sink_node, &spa_graph_node_impl_default, data->sink);
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spa_graph_node_add(&data->graph, &data->sink_node);
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spa_graph_port_init(&data->sink_in, SPA_DIRECTION_INPUT, 0, 0);
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spa_graph_port_add(&data->sink_node, &data->sink_in);
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spa_graph_port_link(&data->source_out, &data->sink_in);
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return res;
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}
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static int negotiate_formats(struct data *data)
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{
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int res;
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struct spa_pod *format;
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struct spa_pod_builder b = { 0 };
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uint8_t buffer[4096];
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spa_pod_builder_init(&b, buffer, sizeof(buffer));
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format = 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->sink,
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SPA_DIRECTION_INPUT, 0,
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SPA_PARAM_Format, 0, format)) < 0)
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return res;
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if ((res = spa_node_port_set_param(data->source,
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SPA_DIRECTION_OUTPUT, 0,
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SPA_PARAM_Format, 0, format)) < 0)
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return res;
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init_buffer(data, data->source_buffers, data->source_buffer, 1, BUFFER_SIZE);
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if ((res =
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spa_node_port_use_buffers(data->sink,
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SPA_DIRECTION_INPUT, 0, 0,
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data->source_buffers, 1)) < 0)
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return res;
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if ((res =
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spa_node_port_use_buffers(data->source,
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SPA_DIRECTION_OUTPUT, 0, 0,
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data->source_buffers, 1)) < 0)
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return res;
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return 0;
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}
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static void *loop(void *user_data)
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{
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struct data *data = user_data;
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printf("enter thread\n");
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spa_loop_control_enter(data->control);
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while (data->running) {
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spa_loop_control_iterate(data->control, -1);
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}
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printf("leave thread\n");
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spa_loop_control_leave(data->control);
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return NULL;
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}
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static void run_async_sink(struct data *data)
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{
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int res, err;
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struct spa_command cmd;
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cmd = SPA_NODE_COMMAND_INIT(SPA_NODE_COMMAND_Start);
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if ((res = spa_node_send_command(data->sink, &cmd)) < 0)
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printf("got error %d\n", res);
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spa_loop_control_leave(data->control);
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data->running = true;
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if ((err = pthread_create(&data->thread, NULL, loop, data)) != 0) {
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printf("can't create thread: %d %s", err, strerror(err));
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data->running = false;
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}
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printf("sleeping for 1000 seconds\n");
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sleep(1000);
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if (data->running) {
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data->running = false;
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pthread_join(data->thread, NULL);
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}
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spa_loop_control_enter(data->control);
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cmd = SPA_NODE_COMMAND_INIT(SPA_NODE_COMMAND_Pause);
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if ((res = spa_node_send_command(data->sink, &cmd)) < 0)
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printf("got error %d\n", res);
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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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char *path;
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if ((path = spa_aprintf("%s/%s", data->plugin_dir, lib)) == NULL) {
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return -ENOMEM;
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}
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if ((hnd = dlopen(path, RTLD_NOW)) == NULL) {
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printf("can't load %s: %s\n", lib, dlerror());
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free(path);
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return -ENOENT;
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}
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free(path);
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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 -ENOENT;
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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 (factory->version < 1)
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continue;
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if (!spa_streq(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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|
|
|
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;
|
|
}
|