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spa examples: Load plugins from SPA_PLUGIN_DIR or installed path

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This lets them be used installed or uninstalled, like pipewire itself.

Signed-off-by: Simon McVittie <smcv@debian.org>
This commit is contained in:
Simon McVittie 2020-06-05 13:19:17 +01:00 • committed by Wim Taymans
parent cecbe8ff17
commit 8b97d2ae74
5 changed files with 99 additions and 32 deletions
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31
spa/examples/example-control.c
View file

@ -22,6 +22,8 @@
* DEALINGS IN THE SOFTWARE.
*/
#include "config.h"
#include <math.h>
#include <string.h>
#include <stdio.h>
@ -63,6 +65,7 @@ struct buffer {
};
struct data {
const char *plugin_dir;
struct spa_log *log;
struct spa_system *system;
struct spa_loop *loop;
@ -141,11 +144,17 @@ static int make_node(struct data *data, struct spa_node **node, const char *lib,
void *hnd;
spa_handle_factory_enum_func_t enum_func;
uint32_t i;
char *path;
if ((hnd = dlopen(lib, RTLD_NOW)) == NULL) {
if ((path = spa_aprintf("%s/%s", data->plugin_dir, lib)) == NULL) {
return -ENOMEM;
}
if ((hnd = dlopen(path, RTLD_NOW)) == NULL) {
printf("can't load %s: %s\n", lib, dlerror());
free(path);
return -ENOENT;
}
free(path);
if ((enum_func = dlsym(hnd, SPA_HANDLE_FACTORY_ENUM_FUNC_NAME)) == NULL) {
printf("can't find enum function\n");
return -ENOENT;
@ -256,7 +265,7 @@ static int make_nodes(struct data *data, const char *device)
//uint32_t idx;
if ((res = make_node(data, &data->sink,
"build/spa/plugins/alsa/libspa-alsa.so",
"alsa/libspa-alsa.so",
SPA_NAME_API_ALSA_PCM_SINK)) < 0) {
printf("can't create alsa-sink: %d\n", res);
return res;
@ -275,7 +284,7 @@ static int make_nodes(struct data *data, const char *device)
printf("got set_props error %d\n", res);
if ((res = make_node(data, &data->source,
"build/spa/plugins/audiotestsrc/libspa-audiotestsrc.so",
"audiotestsrc/libspa-audiotestsrc.so",
"audiotestsrc")) < 0) {
printf("can't create audiotestsrc: %d\n", res);
return res;
@ -421,11 +430,17 @@ static int load_handle(struct data *data, struct spa_handle **handle, const char
void *hnd;
spa_handle_factory_enum_func_t enum_func;
uint32_t i;
char *path;
if ((hnd = dlopen(lib, RTLD_NOW)) == NULL) {
if ((path = spa_aprintf("%s/%s", data->plugin_dir, lib)) == NULL) {
return -ENOMEM;
}
if ((hnd = dlopen(path, RTLD_NOW)) == NULL) {
printf("can't load %s: %s\n", lib, dlerror());
free(path);
return -ENOENT;
}
free(path);
if ((enum_func = dlsym(hnd, SPA_HANDLE_FACTORY_ENUM_FUNC_NAME)) == NULL) {
printf("can't find enum function\n");
return -ENOENT;
@ -463,6 +478,10 @@ int init_data(struct data *data)
struct spa_handle *handle = NULL;
void *iface;
if ((str = getenv("SPA_PLUGIN_DIR")) == NULL)
str = PLUGINDIR;
data->plugin_dir = str;
/* init the graph */
spa_graph_init(&data->graph, &data->graph_state);
@ -472,7 +491,7 @@ int init_data(struct data *data)
/* load and set support system */
if ((res = load_handle(data, &handle,
"build/spa/plugins/support/libspa-support.so",
"support/libspa-support.so",
SPA_NAME_SUPPORT_SYSTEM)) < 0)
return res;
if ((res = spa_handle_get_interface(handle, SPA_TYPE_INTERFACE_System, &iface)) < 0) {
@ -485,7 +504,7 @@ int init_data(struct data *data)
/* load and set support loop and loop control */
if ((res = load_handle(data, &handle,
"build/spa/plugins/support/libspa-support.so",
"support/libspa-support.so",
SPA_NAME_SUPPORT_LOOP)) < 0)
return res;