Implement MIDI device enumeration and latency offset/calibration in portaudio backend

[ardour.git] / libs / backends / portaudio / portaudio_backend.h

diff --git a/libs/backends/portaudio/portaudio_backend.h b/libs/backends/portaudio/portaudio_backend.h
index 498a3d99442353435e692c57b82d4e65ce378609..b028dc212bd5265fa8cfd782eff2fa7ad9502292 100644 (file)
--- a/libs/backends/portaudio/portaudio_backend.h
+++ b/libs/backends/portaudio/portaudio_backend.h
@@ -30,6 +30,7 @@
 #include <boost/shared_ptr.hpp>
 
 #include "ardour/audio_backend.h"
+#include "ardour/dsp_load_calculator.h"
 #include "ardour/types.h"
 
 #include "portaudio_io.h"
@@ -196,8 +197,8 @@ class PortAudioBackend : public AudioBackend {
                int set_output_channels (uint32_t);
                int set_systemic_input_latency (uint32_t);
                int set_systemic_output_latency (uint32_t);
-               int set_systemic_midi_input_latency (std::string const, uint32_t) { return 0; }
-               int set_systemic_midi_output_latency (std::string const, uint32_t) { return 0; }
+               int set_systemic_midi_input_latency (std::string const, uint32_t);
+               int set_systemic_midi_output_latency (std::string const, uint32_t);
 
                int reset_device () { return 0; };
 
@@ -212,10 +213,10 @@ class PortAudioBackend : public AudioBackend {
                uint32_t     output_channels () const;
                uint32_t     systemic_input_latency () const;
                uint32_t     systemic_output_latency () const;
-               uint32_t     systemic_midi_input_latency (std::string const) const { return 0; }
-               uint32_t     systemic_midi_output_latency (std::string const) const { return 0; }
+               uint32_t     systemic_midi_input_latency (std::string const) const;
+               uint32_t     systemic_midi_output_latency (std::string const) const;
 
-               bool can_set_systemic_midi_latencies () const { return false; }
+               bool can_set_systemic_midi_latencies () const { return true; }
 
                /* External control app */
                std::string control_app_name () const;
@@ -226,15 +227,9 @@ class PortAudioBackend : public AudioBackend {
                int set_midi_option (const std::string&);
                std::string midi_option () const;
 
-               std::vector<DeviceStatus> enumerate_midi_devices () const {
-                       return std::vector<AudioBackend::DeviceStatus> ();
-               }
-               int set_midi_device_enabled (std::string const, bool) {
-                       return 0;
-               }
-               bool midi_device_enabled (std::string const) const {
-                       return true;
-               }
+               std::vector<DeviceStatus> enumerate_midi_devices () const;
+               int set_midi_device_enabled (std::string const, bool);
+               bool midi_device_enabled (std::string const) const;
 
        protected:
                /* State Control */
@@ -317,11 +312,42 @@ class PortAudioBackend : public AudioBackend {
 
                void* get_buffer (PortHandle, pframes_t);
 
-               void* main_blocking_process_thread ();
+               void* blocking_process_thread ();
+
+               void* freewheel_process_thread ();
 
        private: // Methods
                bool start_blocking_process_thread ();
                bool stop_blocking_process_thread ();
+               bool blocking_process_freewheel ();
+               bool blocking_process_main (const float* interleaved_input_data,
+                                           float* interleaved_output_data);
+
+               void process_port_connection_changes ();
+               void process_incoming_midi ();
+               void process_outgoing_midi ();
+
+               bool engine_halted ();
+               bool running ();
+
+               static int portaudio_callback(const void* input,
+                                         void* output,
+                                         unsigned long frameCount,
+                                         const PaStreamCallbackTimeInfo* timeInfo,
+                                         PaStreamCallbackFlags statusFlags,
+                                         void* userData);
+
+               bool process_callback(const float* input,
+                                 float* output,
+                                 uint32_t frame_count,
+                                 const PaStreamCallbackTimeInfo* timeInfo,
+                                 PaStreamCallbackFlags statusFlags);
+
+               bool start_freewheel_process_thread ();
+               bool stop_freewheel_process_thread ();
+
+               static bool set_mmcss_pro_audio (HANDLE* task_handle);
+               static bool reset_mmcss (HANDLE task_handle);
 
        private:
                std::string _instance_name;
@@ -332,14 +358,23 @@ class PortAudioBackend : public AudioBackend {
                bool  _active; /* is running, process thread */
                bool  _freewheel;
                bool  _freewheeling;
+               bool  _freewheel_ack;
+               bool  _reinit_thread_callback;
                bool  _measure_latency;
 
-               uint64_t m_cycle_count;
-               uint64_t m_total_deviation_us;
-               uint64_t m_max_deviation_us;
+               ARDOUR::DSPLoadCalculator _dsp_calc;
+
+               bool _freewheel_thread_active;
+
+               pthread_mutex_t _freewheel_mutex;
+               pthread_cond_t _freewheel_signal;
 
-               CycleTimer m_cycle_timer;
-               uint64_t m_last_cycle_start;
+               uint64_t _cycle_count;
+               uint64_t _total_deviation_us;
+               uint64_t _max_deviation_us;
+
+               CycleTimer _cycle_timer;
+               uint64_t _last_cycle_start;
 
                static std::vector<std::string> _midi_options;
                static std::vector<AudioBackend::DeviceStatus> _input_audio_device_status;
@@ -361,6 +396,8 @@ class PortAudioBackend : public AudioBackend {
                uint32_t _systemic_audio_input_latency;
                uint32_t _systemic_audio_output_latency;
 
+               MidiDeviceInfo* midi_device_info(const std::string&) const;
+
                /* portaudio specific  */
                int name_to_id(std::string) const;
 
@@ -371,6 +408,12 @@ class PortAudioBackend : public AudioBackend {
                /* blocking thread */
                pthread_t _main_blocking_thread;
 
+               /* main thread in callback mode(or fw thread when running) */
+               pthread_t _main_thread;
+
+               /* freewheel thread in callback mode */
+               pthread_t _pthread_freewheel;
+
                /* process threads */
                static void* portaudio_process_thread (void *);
                std::vector<pthread_t> _threads;