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/* -*- c++ -*- */
/*
* Copyright 2006-2011,2013-2014 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 <gnuradio/audio/source.h>
#include "osx_common.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
{
private:
Float64 d_device_sample_rate, d_output_sample_rate;
UInt32 d_input_buffer_size_frames, d_input_buffer_size_bytes;
UInt32 d_output_buffer_size_frames, d_output_buffer_size_bytes;
UInt32 d_device_buffer_size_frames, d_device_buffer_size_bytes;
UInt32 d_lead_size_frames, d_lead_size_bytes;
UInt32 d_trail_size_frames, d_trail_size_bytes;
UInt32 d_extra_buffer_size_frames, d_extra_buffer_size_bytes;
UInt32 d_queue_sample_count, d_buffer_sample_count;
UInt32 d_n_available_input_frames, d_n_actual_input_frames;
UInt32 d_n_user_channels, d_n_dev_channels;
bool d_ok_to_block, d_pass_through;
bool d_waiting_for_data, d_do_reset, d_hardware_changed;
bool d_using_default_device;
gr::thread::mutex d_internal;
gr::thread::condition_variable d_cond_data;
std::vector < circular_buffer<float>* > d_buffers;
std::string d_desired_name, d_selected_name;
// CoreAudio variables
AudioDeviceID d_input_ad_id;
AudioUnit d_input_au;
AudioBufferList* d_input_buffer;
AudioBufferList* d_output_buffer;
AudioConverterRef d_audio_converter;
// d_asbd_device: ASBD of the device that is creating the input
// data stream
AudioStreamBasicDescription d_asbd_device;
// d_asbd_client: ASBD of the client side (output) of the
// hardware device
AudioStreamBasicDescription d_asbd_client;
// d_asbd_user: ASBD of the user's arguments, if an audio
// converter is needed outside that provided by the client side.
AudioStreamBasicDescription d_asbd_user;
public:
osx_source(int sample_rate,
const std::string& device_name,
bool ok_to_block);
virtual inline ~osx_source() {
teardown();
}
virtual bool start();
virtual bool stop();
virtual bool check_topology(int ninputs, int noutputs);
virtual int work(int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
inline void reset(bool hardware_changed) {
d_hardware_changed = hardware_changed;
d_do_reset = true;
}
private:
bool is_running();
void setup();
void teardown();
void alloc_audio_buffer_list
(AudioBufferList** t_abl,
UInt32 n_channels,
UInt32 input_buffer_size_bytes);
void free_audio_buffer_list
(AudioBufferList** t_abl);
static OSStatus converter_callback
(AudioConverterRef in_audio_converter,
UInt32* io_number_data_packets,
AudioBufferList* io_data,
AudioStreamPacketDescription** out_aspd,
void* in_user_data);
static OSStatus au_input_callback
(void *in_ref_con,
AudioUnitRenderActionFlags *io_action_flags,
const AudioTimeStamp *in_time_stamp,
UInt32 in_bus_number,
UInt32 in_number_frames,
AudioBufferList *io_data);
#ifndef GR_USE_OLD_AUDIO_UNIT
// OSX 10.4 and newer
static OSStatus hardware_listener
(AudioObjectID in_object_id,
UInt32 in_num_addresses,
const AudioObjectPropertyAddress in_addresses[],
void* in_client_data);
static OSStatus default_listener
(AudioObjectID in_object_id,
UInt32 in_num_addresses,
const AudioObjectPropertyAddress in_addresses[],
void* in_client_data);
#else
// OSX 10.6 and older; removed as of 10.7
static OSStatus hardware_listener
(AudioHardwarePropertyID in_property_id,
void* in_client_data);
static OSStatus default_listener
(AudioHardwarePropertyID in_property_id,
void* in_client_data);
#endif
};
} /* namespace audio */
} /* namespace gr */
#endif /* INCLUDED_AUDIO_OSX_SOURCE_H */
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