diff options
Diffstat (limited to 'gr-audio/lib/osx/audio_osx_source.h')
| -rw-r--r-- | gr-audio/lib/osx/audio_osx_source.h | 115 |
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 */ |