audio: added windows and osx audio source files

1 files changed, 115 insertions, 0 deletions

diff --git a/gr-audio/lib/osx/audio_osx_source.h b/gr-audio/lib/osx/audio_osx_source.h
new file mode 100644
index 000000000..754f0d928
--- /dev/null
+++ b/gr-audio/lib/osx/audio_osx_source.h
@@ -0,0 +1,115 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2006-2011 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio.
+ *
+ * GNU Radio 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, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef INCLUDED_AUDIO_OSX_SOURCE_H
+#define INCLUDED_AUDIO_OSX_SOURCE_H
+
+#include <gr_audio_source.h>
+#include <string>
+#include <AudioToolbox/AudioToolbox.h>
+#include <AudioUnit/AudioUnit.h>
+#include <circular_buffer.h>
+
+/*!
+ * \brief audio source using OSX
+ *
+ * Input signature is one or two streams of floats.
+ * Samples must be in the range [-1,1].
+ */
+
+class audio_osx_source : public gr_sync_block {
+
+  Float64             d_deviceSampleRate, d_outputSampleRate;
+  int                 d_channel_config;
+  UInt32              d_inputBufferSizeFrames, d_inputBufferSizeBytes;
+  UInt32              d_outputBufferSizeFrames, d_outputBufferSizeBytes;
+  UInt32              d_deviceBufferSizeFrames, d_deviceBufferSizeBytes;
+  UInt32              d_leadSizeFrames, d_leadSizeBytes;
+  UInt32              d_trailSizeFrames, d_trailSizeBytes;
+  UInt32              d_extraBufferSizeFrames, d_extraBufferSizeBytes;
+  UInt32              d_queueSampleCount, d_max_sample_count;
+  UInt32              d_n_AvailableInputFrames, d_n_ActualInputFrames;
+  UInt32              d_n_user_channels, d_n_max_channels, d_n_deviceChannels;
+  bool                d_do_block, d_passThrough, d_waiting_for_data;
+  gruel::mutex*       d_internal;
+  gruel::condition_variable* d_cond_data;
+  circular_buffer<float>** d_buffers;
+
+// AudioUnits and Such
+  AudioUnit           d_InputAU;
+  AudioBufferList*    d_InputBuffer;
+  AudioBufferList*    d_OutputBuffer;
+  AudioConverterRef   d_AudioConverter;
+
+public:
+  audio_osx_source (int sample_rate = 44100,
+		    const std::string device_name = "",
+		    bool do_block = true,
+		    int channel_config = -1,
+		    int max_sample_count = -1);
+
+  ~audio_osx_source ();
+
+  bool start ();
+  bool stop ();
+  bool IsRunning ();
+
+  bool check_topology (int ninputs, int noutputs);
+
+  int work (int noutput_items,
+	    gr_vector_const_void_star &input_items,
+	    gr_vector_void_star &output_items);
+
+private:
+  void SetDefaultInputDeviceAsCurrent ();
+
+  void AllocAudioBufferList (AudioBufferList** t_ABL,
+			     UInt32 n_channels,
+			     UInt32 inputBufferSizeBytes);
+
+  void FreeAudioBufferList (AudioBufferList** t_ABL);
+
+  static OSStatus ConverterCallback (AudioConverterRef inAudioConverter,
+				     UInt32* ioNumberDataPackets,
+				     AudioBufferList* ioData,
+				     AudioStreamPacketDescription** outASPD,
+				     void* inUserData);
+
+  static OSStatus AUInputCallback (void *inRefCon,
+				   AudioUnitRenderActionFlags *ioActionFlags,
+				   const AudioTimeStamp *inTimeStamp,
+				   UInt32 inBusNumber,
+				   UInt32 inNumberFrames,
+				   AudioBufferList *ioData);
+#if _OSX_DO_LISTENERS_
+  static OSStatus UnitListener (void *inRefCon,
+				AudioUnit ci,
+				AudioUnitPropertyID inID,
+				AudioUnitScope inScope,
+				AudioUnitElement inElement);
+
+  static OSStatus HardwareListener (AudioHardwarePropertyID inPropertyID, 
+				    void *inClientData);
+#endif
+};
+
+#endif /* INCLUDED_AUDIO_OSX_SOURCE_H */