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00022 #ifndef INCLUDED_AUDIO_PORTAUDIO_SOURCE_H
00023 #define INCLUDED_AUDIO_PORTAUDIO_SOURCE_H
00024
00025 #include <gr_sync_block.h>
00026 #include <gr_buffer.h>
00027 #include <gruel/thread.h>
00028 #include <string>
00029 #include <portaudio.h>
00030 #include <stdexcept>
00031
00032 class audio_portaudio_source;
00033 typedef boost::shared_ptr<audio_portaudio_source> audio_portaudio_source_sptr;
00034
00035
00036
00037
00038
00039
00040
00041
00042 audio_portaudio_source_sptr
00043 audio_portaudio_make_source (int sampling_rate,
00044 const std::string device_name = "",
00045 bool ok_to_block = true);
00046
00047 PaStreamCallback portaudio_source_callback;
00048
00049
00050
00051
00052
00053
00054
00055 class audio_portaudio_source : public gr_sync_block {
00056 friend audio_portaudio_source_sptr
00057 audio_portaudio_make_source (int sampling_rate,
00058 const std::string device_name,
00059 bool ok_to_block);
00060
00061 friend PaStreamCallback portaudio_source_callback;
00062
00063
00064 unsigned int d_sampling_rate;
00065 std::string d_device_name;
00066 bool d_ok_to_block;
00067 bool d_verbose;
00068
00069 unsigned int d_portaudio_buffer_size_frames;
00070
00071 PaStream *d_stream;
00072 PaStreamParameters d_input_parameters;
00073
00074 gr_buffer_sptr d_writer;
00075 gr_buffer_reader_sptr d_reader;
00076
00077 gruel::mutex d_ringbuffer_mutex;
00078 gruel::condition_variable d_ringbuffer_cond;
00079 bool d_ringbuffer_ready;
00080
00081
00082 int d_noverruns;
00083
00084 void output_error_msg (const char *msg, int err);
00085 void bail (const char *msg, int err) throw (std::runtime_error);
00086 void create_ringbuffer();
00087
00088
00089 protected:
00090 audio_portaudio_source (int sampling_rate, const std::string device_name,
00091 bool ok_to_block);
00092
00093 public:
00094 ~audio_portaudio_source ();
00095
00096 bool check_topology (int ninputs, int noutputs);
00097
00098 int work (int ninput_items,
00099 gr_vector_const_void_star &input_items,
00100 gr_vector_void_star &output_items);
00101 };
00102
00103 #endif