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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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25
spa/examples/local-v4l2.c
View file

@ -22,6 +22,8 @@
* DEALINGS IN THE SOFTWARE.
*/
#include "config.h"
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
@ -49,8 +51,6 @@
static SPA_LOG_IMPL(default_log);
#define PATH "build/spa/plugins/"
#define MAX_BUFFERS 8
struct buffer {
@ -63,6 +63,7 @@ struct buffer {
};
struct data {
const char *plugin_dir;
struct spa_log *log;
struct spa_system *system;
struct spa_loop *loop;
@ -95,11 +96,17 @@ 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 = NULL;
if ((hnd = dlopen(lib, RTLD_NOW)) == NULL) {
printf("can't load %s: %s\n", lib, dlerror());
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", path, 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;
@ -240,7 +247,7 @@ static int make_nodes(struct data *data, const char *device)
if ((res =
make_node(data, &data->source,
PATH "v4l2/libspa-v4l2.so",
"v4l2/libspa-v4l2.so",
SPA_NAME_API_V4L2_SOURCE)) < 0) {
printf("can't create v4l2-source: %d\n", res);
return res;
@ -465,8 +472,12 @@ int main(int argc, char *argv[])
struct spa_handle *handle = NULL;
void *iface;
if ((str = getenv("SPA_PLUGIN_DIR")) == NULL)
str = PLUGINDIR;
data.plugin_dir = str;
if ((res = load_handle(&data, &handle,
PATH "support/libspa-support.so",
"support/libspa-support.so",
SPA_NAME_SUPPORT_SYSTEM)) < 0)
return res;
@ -478,7 +489,7 @@ int main(int argc, char *argv[])
data.support[data.n_support++] = SPA_SUPPORT_INIT(SPA_TYPE_INTERFACE_System, data.system);
if ((res = load_handle(&data, &handle,
PATH "support/libspa-support.so",
"support/libspa-support.so",
SPA_NAME_SUPPORT_LOOP)) < 0)
return res;