Skeleton code for CoreAudio output module.

6 files changed, 239 insertions, 1 deletions

diff --git a/configure.ac b/configure.ac
index 556d3c0..c6a7976 100644
--- a/configure.ac
+++ b/configure.ac
@@ -451,6 +451,20 @@ AS_IF(
      have_output_alsa=no]
   )
 
+  dnl *** coreaudio
+  AC_ARG_ENABLE([output_coreaudio],
+		AS_HELP_STRING([--enable-output-coreaudio], [Enable output coreaudio plugin [default=disabled]]),,
+           [enable_output_coreaudio="no"])
+
+  AS_IF(
+    [test "x$enable_output_coreaudio" = "xyes"],
+    [have_output_coreaudio=yes
+     COREAUDIO_LIBS="-framework CoreAudio -framework CoreServices -framework AudioUnit"],
+
+    [AC_MSG_RESULT([*** output coreaudio plugin disabled per user request ***])
+     have_output_coreaudio=no]
+  )
+
   dnl *** wavfile
   AC_ARG_ENABLE([output_wavfile],
 		AS_HELP_STRING([--disable-output-wavfile], [Disable output wavfile plugin [default=enabled]]),,
@@ -501,7 +515,7 @@ AS_IF(
     have_output_oss=no]
   )
 
-  OUTPUT_PLUGINS="dummy alsa wavfile jackaudio oss"
+  OUTPUT_PLUGINS="dummy alsa coreaudio wavfile jackaudio oss"
   AC_SUBST(OUTPUT_PLUGINS)
 
   dnl
@@ -526,6 +540,7 @@ AM_CONDITIONAL([HAVE_INPUT_OSSMIDI], [test "x$have_input_ossmidi" = "xyes"])
 AM_CONDITIONAL([HAVE_INPUT_MIDIFILE], [test "x$have_input_midifile" = "xyes"])
 AM_CONDITIONAL([HAVE_OUTPUT_DUMMY], [test "x$have_output_dummy" = "xyes"])
 AM_CONDITIONAL([HAVE_OUTPUT_ALSA], [test "x$have_output_alsa" = "xyes"])
+AM_CONDITIONAL([HAVE_OUTPUT_COREAUDIO], [test "x$have_output_coreaudio" = "xyes"])
 AM_CONDITIONAL([HAVE_OUTPUT_WAVFILE], [test "x$have_output_wavfile" = "xyes"])
 AM_CONDITIONAL([HAVE_OUTPUT_JACKAUDIO], [test "x$have_output_jackaudio" = "xyes"])
 AM_CONDITIONAL([HAVE_OUTPUT_OSS], [test "x$have_output_oss" = "xyes"])
diff --git a/drumgizmo/Makefile.am b/drumgizmo/Makefile.am
index 40bddc9..a85e7ca 100644
--- a/drumgizmo/Makefile.am
+++ b/drumgizmo/Makefile.am
@@ -60,6 +60,13 @@ drumgizmo_SOURCES += output/alsa.cc
 drumgizmo_CXXFLAGS += -DHAVE_OUTPUT_ALSA
 endif # HAVE_OUTPUT_ALSA
 
+if HAVE_OUTPUT_COREAUDIO
+drumgizmo_CXXFLAGS += $(COREAUDIO_CFLAGS)
+drumgizmo_LDFLAGS += $(COREAUDIO_LIBS)
+drumgizmo_SOURCES += output/coreaudio.cc
+drumgizmo_CXXFLAGS += -DHAVE_OUTPUT_COREAUDIO
+endif # HAVE_OUTPUT_COREAUDIO
+
 if HAVE_OUTPUT_JACKAUDIO
 drumgizmo_CXXFLAGS += $(JACK_CFLAGS)
 drumgizmo_LDFLAGS += $(JACK_LIBS)
@@ -96,6 +103,7 @@ EXTRA_DIST = \
 	input/midifile.h \
 	input/ossmidi.h \
 	output/alsa.h \
+	output/coreaudio.h \
 	output/jackaudio.h \
 	output/outputdummy.h \
 	output/oss.h \
diff --git a/drumgizmo/enginefactory.cc b/drumgizmo/enginefactory.cc
index c93607e..21ed93d 100644
--- a/drumgizmo/enginefactory.cc
+++ b/drumgizmo/enginefactory.cc
@@ -63,6 +63,9 @@ EngineFactory::EngineFactory()
 #ifdef HAVE_OUTPUT_ALSA
 	output.push_back("alsa");
 #endif
+#ifdef HAVE_OUTPUT_COREAUDIO
+	output.push_back("coreaudio");
+#endif
 #ifdef HAVE_OUTPUT_JACKAUDIO
 	output.push_back("jackaudio");
 #endif
@@ -151,6 +154,12 @@ std::unique_ptr<AudioOutputEngine> EngineFactory::createOutput(const std::string
 		return std::make_unique<AlsaOutputEngine>();
 	}
 #endif
+#ifdef HAVE_OUTPUT_COREAUDIO
+	if(name == "coreaudio")
+	{
+		return std::make_unique<CoreAudioOutputEngine>();
+	}
+#endif
 #ifdef HAVE_OUTPUT_JACKAUDIO
 	if(name == "jackaudio")
 	{
diff --git a/drumgizmo/enginefactory.h b/drumgizmo/enginefactory.h
index 0b37c6e..23fb485 100644
--- a/drumgizmo/enginefactory.h
+++ b/drumgizmo/enginefactory.h
@@ -69,6 +69,10 @@
 #include "output/alsa.h"
 #endif
 
+#ifdef HAVE_OUTPUT_COREAUDIO
+#include "output/coreaudio.h"
+#endif
+
 #ifdef HAVE_OUTPUT_JACKAUDIO
 #include "output/jackaudio.h"
 #endif
diff --git a/drumgizmo/output/coreaudio.cc b/drumgizmo/output/coreaudio.cc
new file mode 100644
index 0000000..7cae44a
--- /dev/null
+++ b/drumgizmo/output/coreaudio.cc
@@ -0,0 +1,147 @@
+/* -*- Mode: c++ -*- */
+/***************************************************************************
+ *            coreaudio.cc
+ *
+ *  Sat Oct 21 18:27:52 CEST 2017
+ *  Copyright 2017 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  DrumGizmo 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 Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "coreaudio.h"
+
+#include <hugin.hpp>
+
+static const char* errorString(OSStatus err)
+{
+	const char* err_string = "unknown";
+	switch (err) {
+	case kAudioHardwareNoError:
+		err_string = "kAudioHardwareNoError";
+		break;
+	case kAudioHardwareNotRunningError:
+		err_string = "kAudioHardwareNotRunningError";
+		break;
+	case kAudioHardwareUnspecifiedError:
+		err_string = "kAudioHardwareUnspecifiedError";
+		break;
+	case kAudioHardwareUnknownPropertyError:
+		err_string = "kAudioHardwareUnknownPropertyError";
+		break;
+	case kAudioHardwareBadPropertySizeError:
+		err_string = "kAudioHardwareBadPropertySizeError";
+		break;
+	case kAudioHardwareIllegalOperationError:
+		err_string = "kAudioHardwareIllegalOperationError";
+		break;
+	case kAudioHardwareBadDeviceError:
+		err_string = "kAudioHardwareBadDeviceError";
+		break;
+	case kAudioHardwareBadStreamError:
+		err_string = "kAudioHardwareBadStreamError";
+		break;
+	case kAudioDeviceUnsupportedFormatError:
+		err_string = "kAudioDeviceUnsupportedFormatError";
+		break;
+	case kAudioDevicePermissionsError:
+		err_string = "kAudioDevicePermissionsError";
+		break;
+	default:
+		break;
+	}
+
+	return err_string;
+}
+
+
+CoreAudioOutputEngine::CoreAudioOutputEngine()
+{
+	OSStatus err;
+	std::uint32_t size;
+
+	size = sizeof(AudioDeviceID);
+	err = AudioHardwareGetProperty(kAudioHardwarePropertyDefaultOutputDevice,
+	                               &size, &device_id);
+	if(err != noErr)
+	{
+		ERR(coreaudio, "Error kAudioHardwarePropertyDefaultOutputDevice: %s",
+		    errorString(err));
+	}
+
+	char device_name[256];
+	memset(device_name, 0, sizeof(device_name));
+	size = sizeof(device_name) - 1; // leave space for terminating zero
+	err = AudioDeviceGetProperty(device_id, 0, false,
+	                             kAudioDevicePropertyDeviceName,
+	                             &size, device_name);
+	if(err != noErr)
+	{
+		ERR(coreaudio, "Error kAudioDevicePropertyDeviceName: %s",
+		    errorString(err));
+	}
+
+	DEBUG(coreaudio, "default device id: %d (%s)", device_id, device_name);
+}
+
+CoreAudioOutputEngine::~CoreAudioOutputEngine()
+{
+}
+
+bool CoreAudioOutputEngine::init(const Channels& channels)
+{
+	return true;
+}
+
+void CoreAudioOutputEngine::setParm(const std::string& parm,
+                                    const std::string& value)
+{
+}
+
+bool CoreAudioOutputEngine::start()
+{
+	return true;
+}
+
+void CoreAudioOutputEngine::stop()
+{
+}
+
+void CoreAudioOutputEngine::pre(size_t nsamples)
+{
+}
+
+void CoreAudioOutputEngine::run(int ch, sample_t* samples, size_t nsamples)
+{
+	// Write channel data in interleaved buffer
+}
+
+void CoreAudioOutputEngine::post(size_t nsamples)
+{
+	// Write the interleaved buffer to the soundcard
+}
+
+size_t CoreAudioOutputEngine::getSamplerate() const
+{
+	return 0;
+}
+
+bool CoreAudioOutputEngine::isFreewheeling() const
+{
+	return false;
+}
diff --git a/drumgizmo/output/coreaudio.h b/drumgizmo/output/coreaudio.h
new file mode 100644
index 0000000..44df0a0
--- /dev/null
+++ b/drumgizmo/output/coreaudio.h
@@ -0,0 +1,55 @@
+/* -*- Mode: c++ -*- */
+/***************************************************************************
+ *            coreaudio.h
+ *
+ *  Sat Oct 21 18:27:52 CEST 2017
+ *  Copyright 2017 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  DrumGizmo 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 Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#pragma once
+
+#include <audiotypes.h>
+#include <CoreAudio/CoreAudio.h>
+#include <AudioUnit/AudioUnit.h>
+
+#include "audiooutputengine.h"
+
+class CoreAudioOutputEngine
+	: public AudioOutputEngine
+{
+public:
+	CoreAudioOutputEngine();
+	~CoreAudioOutputEngine();
+
+	// based on AudioOutputEngine
+	bool init(const Channels& chan) override;
+	void setParm(const std::string& parm, const std::string& value) override;
+	bool start() override;
+	void stop() override;
+	void pre(size_t nsamples) override;
+	void run(int ch, sample_t* samples, size_t nsamples) override;
+	void post(size_t nsamples) override;
+	size_t getSamplerate() const override;
+	bool isFreewheeling() const override;
+
+private:
+	AudioDeviceID device_id;
+};