From aebd0a50d1981c92e4918923ac77c0ad95d167b7 Mon Sep 17 00:00:00 2001
From: Thomas Groman <tgroman@nuegia.net>
Date: Sun, 27 Oct 2019 00:20:29 -0700
Subject: added initial framework to hold jack code

---
 src/audio/audio_device.cpp |  9 +++++++++
 src/audio/audio_device.h   | 26 ++++++++++++++++++++++++++
 src/sys_settings.cpp       |  9 +++++++++
 3 files changed, 44 insertions(+)

diff --git a/src/audio/audio_device.cpp b/src/audio/audio_device.cpp
index dd61e8d..84aa2db 100644
--- a/src/audio/audio_device.cpp
+++ b/src/audio/audio_device.cpp
@@ -33,6 +33,10 @@
 #include <alsa/asoundlib.h>
 #endif
 
+#ifdef HAVE_JACK
+#include <jack/jack.h>
+#endif
+
 t_audio_io* t_audio_io::open(const t_audio_device& dev, bool playback, bool capture, bool blocking, int channels, t_audio_sampleformat format, int sample_rate, bool short_latency)
 {
 	t_audio_io* aio;
@@ -44,6 +48,11 @@ t_audio_io* t_audio_io::open(const t_audio_device& dev, bool playback, bool capt
 	} else if (dev.type == t_audio_device::ALSA) {
 		aio = new t_alsa_io();
 		MEMMAN_NEW(aio);
+#endif
+#ifdef HAVE_JACK
+	} elseif (dev.type == t_audio_device::JACK) {
+		aio = new t_jack_io();
+		MEMMAN_NEW(aio);
 #endif
 	} else {
 		string msg("Audio device not implemented");
diff --git a/src/audio/audio_device.h b/src/audio/audio_device.h
index 5adc1bb..ec81996 100644
--- a/src/audio/audio_device.h
+++ b/src/audio/audio_device.h
@@ -122,4 +122,30 @@ private:
 };
 #endif
 
+#ifdef HAVE_JACK
+class t_jack_io : public t_audio_io {
+public:
+	t_jack_io();
+	virtual ~t_jack_io();
+	void enable(bool enable_playback, bool enable_recording);
+	void flush(bool playback_buffer, bool recording_buffer);
+	int get_buffer_space(bool is_recording_buffer);
+	int get_buffer_size(bool is_recording_buffer);
+	bool play_buffer_underrun(void);
+	int read(unsigned char* buf, int len);
+	int write(const unsigned char* buf, int len);
+protected:
+	bool open(const string& device, 
+		bool playback, 
+		bool capture, 
+		bool blocking, 
+		int channels, t_audio_sampleformat format, 
+		int sample_rate, 
+		bool short_latency);
+private:
+	int fd;
+	int play_buffersize, rec_buffersize;
+};
+#endif
+
 #endif
diff --git a/src/sys_settings.cpp b/src/sys_settings.cpp
index bb07539..32d215d 100644
--- a/src/sys_settings.cpp
+++ b/src/sys_settings.cpp
@@ -153,6 +153,12 @@ string t_audio_device::get_description(void) const {
 			s += ": ";
 			s += name;
 		}
+	} else if (type == JACK) {
+		s = "JACK: " +s;
+		if (!name.empty()) {
+			s += ": ";
+			s += name;
+		}
 	} else {
 		s = "Unknown: " + s;
 	}
@@ -170,6 +176,9 @@ string t_audio_device::get_settings_value(void) const {
 	case ALSA:
 		s = PFX_ALSA;
 		break;
+	case JACK:
+		s = PFX_JACK;
+		break;
 	default:
 		assert(false);
 	}
-- 
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