1 files changed, 105 insertions, 0 deletions
diff --git a/libs/backends/coreaudio/coreaudio_pcmio.h b/libs/backends/coreaudio/coreaudio_pcmio.h
new file mode 100644
index 0000000000..179f1aec02
--- /dev/null
+++ b/libs/backends/coreaudio/coreaudio_pcmio.h
@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2015 Robin Gareus <robin@gareus.org>
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <CoreServices/CoreServices.h>
+#include <CoreAudio/CoreAudio.h>
+#include <AudioUnit/AudioUnit.h>
+
+#include <AudioUnit/AudioUnit.h>
+#include <AudioToolbox/AudioToolbox.h>
+
+#include <map>
+#include <string>
+
+#define AUHAL_OUTPUT_ELEMENT 0
+#define AUHAL_INPUT_ELEMENT 1
+
+
+class CoreAudioPCM {
+public:
+	CoreAudioPCM (void);
+	~CoreAudioPCM (void);
+
+
+	int      state (void) const { return _state; }
+	uint32_t n_playback_channels (void) const { return _playback_channels; }
+	uint32_t n_capture_channels (void) const { return _capture_channels; }
+
+	void     discover();
+	void     device_list(std::map<size_t, std::string> &devices) const { devices = _devices;}
+
+	void     pcm_stop (void);
+	int      pcm_start (
+			uint32_t input_device,
+			uint32_t output_device,
+			uint32_t sample_rate,
+			uint32_t samples_per_period,
+			int (process_callback (void*)),
+			void * process_arg
+			);
+
+	void     set_error_callback (
+			void ( error_callback (void*)),
+			void * error_arg
+                        ) {
+                _error_callback = error_callback;
+                _error_arg = error_arg;
+        }
+
+	// must be called from process_callback;
+	int      get_capture_channel (uint32_t chn, float *input, uint32_t n_samples);
+	int      set_playback_channel (uint32_t chn, const float *input, uint32_t n_samples);
+	uint32_t n_samples() const { return _cur_samples_per_period; };
+
+	// really private
+	OSStatus render_callback (
+			AudioUnitRenderActionFlags* ioActionFlags,
+			const AudioTimeStamp* inTimeStamp,
+			UInt32 inBusNumber,
+			UInt32 inNumberFrames,
+			AudioBufferList* ioData);
+
+        void hwPropertyChange();
+
+private:
+	AudioUnit _auhal;
+	AudioDeviceID* _deviceIDs;
+	AudioBufferList* _inputAudioBufferList;
+	AudioBufferList* _outputAudioBufferList;
+
+	int _state;
+
+	uint32_t _max_samples_per_period;
+	uint32_t _cur_samples_per_period;
+	uint32_t _capture_channels;
+	uint32_t _playback_channels;
+	bool     _in_process;
+	size_t   _numDevices;
+
+	int (* _process_callback) (void*);
+	void * _process_arg;
+
+	void (* _error_callback) (void*);
+	void  * _error_arg;
+
+	std::map<size_t, std::string> _devices;
+        // TODO proper device info struct
+	uint32_t * _device_ins;
+	uint32_t * _device_outs;
+
+};