Audio Plugin: add PulseAudio support

If PulseAudio development libraries are present, Audio
plugin will now support it. It may still fall back to
ALSA if a PulseAudio server is not found at runtime.

PulseAudio backend supports multiple clients using
one audio adapter.

(+ various fixes and style improvements)

Signed-off-by: Manuel Bachmann <manuel.bachmann@iot.bzh>

1 files changed, 62 insertions, 0 deletions

diff --git a/plugins/audio/audio-pulse.h b/plugins/audio/audio-pulse.h
new file mode 100644
index 00000000..fc18d9c0
--- /dev/null
+++ b/plugins/audio/audio-pulse.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2016 "IoT.bzh"
+ * Author "Manuel Bachmann"
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef AUDIO_PULSE_H
+#define AUDIO_PULSE_H
+
+#include <sys/time.h>
+#include <pulse/pulseaudio.h>
+#include <pulse/simple.h>
+#include <pulse/error.h>
+
+#include "audio-alsa.h"
+#include "local-def.h"
+
+typedef struct dev_ctx_pulse dev_ctx_pulse_T;
+typedef struct alsa_info alsa_info_T;
+
+struct dev_ctx_pulse {
+  char *sink_name;
+  char **card_name;
+  pa_mainloop *pa_loop;
+  pa_context *pa_context;
+  pa_simple *pa;
+  pa_cvolume volume;
+  int mute;
+  unsigned char refresh;
+  pthread_t thr;
+  unsigned char thr_should_run;
+  unsigned char thr_finished;
+};
+
+struct alsa_info {
+  char *device;
+  char *synonyms;
+};
+
+STATIC void  _pulse_context_cb (pa_context *, void *);
+STATIC void  _pulse_sink_list_cb (pa_context *, const pa_sink_info *, int, void *);
+STATIC void  _pulse_sink_info_cb (pa_context *, const pa_sink_info *, int, void *);
+STATIC void* _pulse_play_thread_fn (void *);
+PUBLIC void  _pulse_refresh_sink (dev_ctx_pulse_T *);
+
+static struct alsa_info **alsa_info = NULL;
+static struct dev_ctx_pulse **dev_ctx_p = NULL;
+static unsigned int client_count = 0;
+
+#endif /* AUDIO_PULSE_H */