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00022 #ifndef INCLUDED_AUDIO_PORTAUDIO_SINK_H
00023 #define INCLUDED_AUDIO_PORTAUDIO_SINK_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
00033 class audio_portaudio_sink;
00034 typedef boost::shared_ptr<audio_portaudio_sink> audio_portaudio_sink_sptr;
00035
00036
00037
00038
00039
00040
00041
00042
00043 audio_portaudio_sink_sptr
00044 audio_portaudio_make_sink (int sampling_rate,
00045 const std::string device_name = "",
00046 bool ok_to_block = true);
00047
00048 PaStreamCallback portaudio_sink_callback;
00049
00050
00051
00052
00053
00054
00055
00056 class audio_portaudio_sink : public gr_sync_block {
00057 friend audio_portaudio_sink_sptr
00058 audio_portaudio_make_sink (int sampling_rate,
00059 const std::string device_name,
00060 bool ok_to_block);
00061
00062 friend PaStreamCallback portaudio_sink_callback;
00063
00064
00065 unsigned int d_sampling_rate;
00066 std::string d_device_name;
00067 bool d_ok_to_block;
00068 bool d_verbose;
00069
00070 unsigned int d_portaudio_buffer_size_frames;
00071
00072 PaStream *d_stream;
00073 PaStreamParameters d_output_parameters;
00074
00075 gr_buffer_sptr d_writer;
00076 gr_buffer_reader_sptr d_reader;
00077
00078 gruel::mutex d_ringbuffer_mutex;
00079 gruel::condition_variable d_ringbuffer_cond;
00080 bool d_ringbuffer_ready;
00081
00082
00083 int d_nunderuns;
00084
00085
00086 void output_error_msg (const char *msg, int err);
00087 void bail (const char *msg, int err) throw (std::runtime_error);
00088 void create_ringbuffer();
00089
00090
00091 protected:
00092 audio_portaudio_sink (int sampling_rate, const std::string device_name,
00093 bool ok_to_block);
00094
00095 public:
00096 ~audio_portaudio_sink ();
00097
00098 bool check_topology (int ninputs, int noutputs);
00099
00100 int work (int noutput_items,
00101 gr_vector_const_void_star &input_items,
00102 gr_vector_void_star &output_items);
00103 };
00104
00105 #endif