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Diffstat (limited to 'gr-audio/lib/osx/osx_source.h')
| -rw-r--r-- | gr-audio/lib/osx/osx_source.h | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/gr-audio/lib/osx/osx_source.h b/gr-audio/lib/osx/osx_source.h new file mode 100644 index 0000000000..9315c8e44e --- /dev/null +++ b/gr-audio/lib/osx/osx_source.h @@ -0,0 +1,121 @@ +/* -*- c++ -*- */ +/* + * Copyright 2006-2011,2013 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 <audio/source.h> +#include <string> +#include <AudioToolbox/AudioToolbox.h> +#include <AudioUnit/AudioUnit.h> +#include <circular_buffer.h> + +namespace gr { + namespace audio { + + /*! + * \brief audio source using OSX + * \ingroup audio_blk + * + * Input signature is one or two streams of floats. + * Samples must be in the range [-1,1]. + */ + class osx_source : public source + { + 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: + osx_source(int sample_rate = 44100, + const std::string device_name = "", + bool do_block = true, + int channel_config = -1, + int max_sample_count = -1); + + ~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 + }; + + } /* namespace audio */ +} /* namespace gr */ + +#endif /* INCLUDED_AUDIO_OSX_SOURCE_H */ |