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authorPaul W. Frields <stickster@gmail.com>2009-05-23 15:59:38 -0400
committerPaul W. Frields <stickster@gmail.com>2009-05-23 15:59:38 -0400
commitccf4ecaaf1136cb01bc10bffb337acad88165d1d (patch)
treefc44ccdcee460afb62c590880995a680aa26b9b5 /utils
parent83185031c42fbc05d4bc400bd77d6af448b759aa (diff)
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Utility to list sources and sinks from PA server
Diffstat (limited to 'utils')
-rw-r--r--utils/palist.c251
1 files changed, 251 insertions, 0 deletions
diff --git a/utils/palist.c b/utils/palist.c
new file mode 100644
index 0000000..72376a2
--- /dev/null
+++ b/utils/palist.c
@@ -0,0 +1,251 @@
+/*
+ * palist.c - List sinks and/or sources available on a PulseAudio server
+ *
+ * This file is licensed under terms of the GNU General Public License
+ * (GPL), either version 2 or (at your option) any later version. No
+ * warranty is herein expressed or implied. Refer to the GNU GPL for
+ * more details.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include <errno.h>
+#include <unistd.h>
+#include <limits.h>
+#include <assert.h>
+#include <getopt.h>
+
+#include <pulse/pulseaudio.h>
+
+static pa_context *context = NULL;
+static pa_mainloop_api *mainloop_api = NULL;
+
+static int verbose = 0;
+static int actions = 1;
+
+static enum {
+ NONE,
+ LIST_SOURCES,
+ LIST_SINKS,
+ LIST_ALL
+} action = NONE;
+
+static inline const char *pa_strnull(const char *x) {
+ return x ? x : "(null)";
+}
+
+/* Shortcut to terminate */
+static void quit(int ret) {
+ assert(mainloop_api);
+ mainloop_api->quit(mainloop_api, ret);
+}
+
+static void context_drain_complete(pa_context *c, void *userdata) {
+ pa_context_disconnect(c);
+}
+
+static void drain(void) {
+ pa_operation *o;
+ if(!(o = pa_context_drain(context, context_drain_complete, NULL)))
+ pa_context_disconnect(context);
+ else
+ pa_operation_unref(o);
+}
+
+static void complete_action(void) {
+ assert(actions > 0);
+ if(!(--actions))
+ drain();
+}
+
+static void exit_signal_callback(pa_mainloop_api *m, pa_signal_event *e, int sig, void *userdata) {
+ fprintf(stderr, "Got SIGINT, exiting.\n");
+ quit(0);
+}
+
+static void get_source_list_callback(pa_context *c,
+ const pa_source_info *i,
+ int eol,
+ void *userdata) {
+ if(eol < 0) {
+ fprintf(stderr, "Failed to get source information: %s\n",
+ pa_strerror(pa_context_errno(c)));
+ quit(1);
+ return;
+ }
+
+ if(eol) {
+ complete_action();
+ return;
+ }
+
+ assert(i);
+
+ printf("Source #%u <%s> %s\n", i->index, i->name, pa_strnull(i->description));
+}
+
+static void get_sink_list_callback(pa_context *c,
+ const pa_sink_info *i,
+ int eol,
+ void *userdata) {
+ if(eol < 0) {
+ fprintf(stderr, "Failed to get sink information: %s\n",
+ pa_strerror(pa_context_errno(c)));
+ quit(1);
+ return;
+ }
+
+ if(eol) {
+ complete_action();
+ return;
+ }
+
+ assert(i);
+
+ printf("Sink #%u <%s> %s\n", i->index, i->name, pa_strnull(i->description));
+}
+
+static void context_state_callback(pa_context *c, void *userdata) {
+ assert(c);
+ switch (pa_context_get_state(c)) {
+ case PA_CONTEXT_CONNECTING:
+ case PA_CONTEXT_AUTHORIZING:
+ case PA_CONTEXT_SETTING_NAME:
+ break;
+
+ case PA_CONTEXT_READY:
+ switch (action) {
+ case LIST_SOURCES:
+ pa_operation_unref(pa_context_get_source_info_list(c, get_source_list_callback, NULL));
+ break;
+
+ case LIST_SINKS:
+ pa_operation_unref(pa_context_get_sink_info_list(c, get_sink_list_callback, NULL));
+ break;
+
+ case LIST_ALL:
+ actions = 2;
+ pa_operation_unref(pa_context_get_source_info_list(c, get_source_list_callback, NULL));
+ pa_operation_unref(pa_context_get_sink_info_list(c, get_sink_list_callback, NULL));
+ break;
+
+ default:
+ assert(0);
+ }
+ break;
+
+ case PA_CONTEXT_TERMINATED:
+ quit(0);
+ break;
+
+ case PA_CONTEXT_FAILED:
+ default:
+ fprintf(stderr, "Connection failure: %s\n",
+ pa_strerror(pa_context_errno(c)));
+ quit(1);
+ }
+}
+
+
+static void help(const char *argv0) {
+ printf("%s [options]\n"
+ " -h Show this help\n"
+ " -c, --list-sources List sources\n"
+ " -k, --list-sinks List sinks\n"
+ " -a, --list-all List sources and sinks\n",
+ argv0);
+}
+
+
+/* ----------- MAIN ------------ */
+int main(int argc, char *argv[]) {
+ pa_mainloop* m = NULL;
+ char *server = NULL;
+ char *client_name = NULL;
+ int ret = 1, r, c;
+
+ static const struct option long_options[] = {
+ {"help", 0, NULL, 'h'},
+ {"list-sources", 0, NULL, 'c'},
+ {"list-sinks", 0, NULL, 'k'},
+ {"list-all", 0, NULL, 'a'},
+ {NULL, 0, NULL, 0}
+ };
+
+ client_name = pa_xstrdup("palist"); // Make this more flexible later;
+
+ while ((c = getopt_long(argc, argv, "ckah", long_options, NULL)) != -1) {
+ switch (c) {
+ case 'h':
+ help(client_name);
+ ret = 0;
+ goto quit;
+
+ case 'c':
+ action = LIST_SOURCES;
+ break;
+
+ case 'k':
+ action = LIST_SINKS;
+ break;
+
+ case 'a':
+ action = LIST_ALL;
+ break;
+
+ default:
+ goto quit;
+ }
+ }
+
+ if (action == NONE) {
+ fprintf(stderr, "No valid option specified\n");
+ goto quit;
+ }
+
+ if (!(m = pa_mainloop_new())) {
+ fprintf(stderr, "pa_mainloop_new() failed.\n");
+ goto quit;
+ }
+
+ mainloop_api = pa_mainloop_get_api(m);
+
+ r = pa_signal_init(mainloop_api);
+ assert(r == 0);
+ pa_signal_new(SIGINT, exit_signal_callback, NULL);
+#ifdef SIGPIPE
+ signal(SIGPIPE, SIG_IGN);
+#endif
+
+ if (!(context = pa_context_new(mainloop_api, client_name))) {
+ fprintf(stderr, "pa_context_new() failed.\n");
+ goto quit;
+ }
+
+ pa_context_set_state_callback(context, context_state_callback, NULL);
+ if (pa_context_connect(context, server, 0, NULL) < 0) {
+ fprintf(stderr, "pa_context_connect() failed: %s", pa_strerror(pa_context_errno(context)));
+ goto quit;
+ }
+
+ if (pa_mainloop_run(m, &ret) < 0) {
+ fprintf(stderr, "pa_mainloop_run() failed.\n");
+ goto quit;
+ }
+
+quit:
+ if (context)
+ pa_context_unref(context);
+
+ if (m) {
+ pa_signal_done();
+ pa_mainloop_free(m);
+ }
+
+ pa_xfree(client_name);
+
+ return ret;
+}