audio_portaudio_sink.h
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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 <omnithread.h>
00028 #include <string>
00029 #include <portaudio.h>
00030 #include <stdexcept>
00031 #include <gri_logger.h>
00032
00033 class audio_portaudio_sink;
00034 typedef boost::shared_ptr<audio_portaudio_sink> audio_portaudio_sink_sptr;
00035
00042 audio_portaudio_sink_sptr
00043 audio_portaudio_make_sink (int sampling_rate,
00044 const std::string dev = "",
00045 bool ok_to_block = true);
00046
00047 PaStreamCallback portaudio_sink_callback;
00048
00049
00055 class audio_portaudio_sink : public gr_sync_block {
00056 friend audio_portaudio_sink_sptr
00057 audio_portaudio_make_sink (int sampling_rate,
00058 const std::string device_name,
00059 bool ok_to_block);
00060
00061 friend PaStreamCallback portaudio_sink_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_output_parameters;
00073
00074 gr_buffer_sptr d_writer;
00075 gr_buffer_reader_sptr d_reader;
00076 omni_semaphore d_ringbuffer_ready;
00077
00078
00079
00080 int d_nunderuns;
00081 gri_logger_sptr d_log;
00082
00083 void output_error_msg (const char *msg, int err);
00084 void bail (const char *msg, int err) throw (std::runtime_error);
00085 void create_ringbuffer();
00086
00087
00088 protected:
00089 audio_portaudio_sink (int sampling_rate, const std::string device_name,
00090 bool ok_to_block);
00091
00092 public:
00093 ~audio_portaudio_sink ();
00094
00095 bool check_topology (int ninputs, int noutputs);
00096
00097 int work (int noutput_items,
00098 gr_vector_const_void_star &input_items,
00099 gr_vector_void_star &output_items);
00100 };
00101
00102 #endif