hvirtual/cinelerra/pluginclient.h

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#ifndef PLUGINCLIENT_H
#define PLUGINCLIENT_H

// Base class inherited by all the different types of plugins.

#define BCASTDIR "~/.bcast/"

class PluginClient;


#include "arraylist.h"
#include "condition.h"
#include "edlsession.inc"
#include "keyframe.h"
#include "mainprogress.inc"
#include "maxbuffers.h"
#include "plugincommands.h"
#include "pluginserver.inc"
#include "theme.inc"
#include "vframe.h"


extern "C"
{
extern PluginClient* new_plugin(PluginServer *server);
}

class PluginClientAuto
{
public:
        float position;
        float intercept;
        float slope;
};




// Convenience functions

#define REGISTER_PLUGIN(class_title) \
PluginClient* new_plugin(PluginServer *server) \
{ \
        return new class_title(server); \
}


#define WINDOW_CLOSE_EVENT(window_class) \
int window_class::close_event() \
{ \
/* Set result to 1 to indicate a client side close */ \
        set_done(1); \
        return 1; \
}


#define PLUGIN_THREAD_HEADER(plugin_class, thread_class, window_class) \
class thread_class : public Thread \
{ \
public: \
        thread_class(plugin_class *plugin); \
        ~thread_class(); \
        void run(); \
        window_class *window; \
        plugin_class *plugin; \
};


#define PLUGIN_THREAD_OBJECT(plugin_class, thread_class, window_class) \
thread_class::thread_class(plugin_class *plugin) \
 : Thread(0, 0, 1) \
{ \
        this->plugin = plugin; \
} \
 \
thread_class::~thread_class() \
{ \
        delete window; \
} \
 \
void thread_class::run() \
{ \
        BC_DisplayInfo info; \
        window = new window_class(plugin,  \
                info.get_abs_cursor_x() - 75,  \
                info.get_abs_cursor_y() - 65); \
        window->create_objects(); \
 \
/* Only set it here so tracking doesn't update it until everything is created. */ \
        plugin->thread = this; \
        int result = window->run_window(); \
/* This is needed when the GUI is closed from itself */ \
        if(result) plugin->client_side_close(); \
}




#define PLUGIN_CLASS_MEMBERS(config_name, thread_name) \
        int load_configuration(); \
        VFrame* new_picon(); \
        char* plugin_title(); \
        int show_gui(); \
        int set_string(); \
        void raise_window(); \
        BC_Hash *defaults; \
        config_name config; \
        thread_name *thread;

#define PLUGIN_CONSTRUCTOR_MACRO \
        thread = 0; \
        defaults = 0; \
        load_defaults(); \

#define PLUGIN_DESTRUCTOR_MACRO \
        if(thread) \
        { \
/* This is needed when the GUI is closed from elsewhere than itself */ \
/* Since we now use autodelete, this is all that has to be done, thread will take care of itself ... */ \
/* Thread join will wait if this was not called from the thread itself or go on if it was */ \
                thread->window->lock_window("PLUGIN_DESTRUCTOR_MACRO"); \
                thread->window->set_done(0); \
                thread->window->unlock_window(); \
                thread->join(); \
        } \
 \
 \
        if(defaults) save_defaults(); \
        if(defaults) delete defaults;




#define SHOW_GUI_MACRO(plugin_class, thread_class) \
int plugin_class::show_gui() \
{ \
        load_configuration(); \
        thread_class *new_thread = new thread_class(this); \
        new_thread->start(); \
        return 0; \
}

#define RAISE_WINDOW_MACRO(plugin_class) \
void plugin_class::raise_window() \
{ \
        if(thread) \
        { \
                thread->window->lock_window(); \
                thread->window->raise_window(); \
                thread->window->flush(); \
                thread->window->unlock_window(); \
        } \
}

#define SET_STRING_MACRO(plugin_class) \
int plugin_class::set_string() \
{ \
        if(thread) \
        { \
                thread->window->lock_window(); \
                thread->window->set_title(gui_string); \
                thread->window->unlock_window(); \
        } \
        return 0; \
}

#define NEW_PICON_MACRO(plugin_class) \
VFrame* plugin_class::new_picon() \
{ \
        return new VFrame(picon_png); \
}

#define LOAD_CONFIGURATION_MACRO(plugin_class, config_class) \
int plugin_class::load_configuration() \
{ \
        KeyFrame *prev_keyframe, *next_keyframe; \
        prev_keyframe = get_prev_keyframe(get_source_position()); \
        next_keyframe = get_next_keyframe(get_source_position()); \
 \
        int64_t next_position = edl_to_local(next_keyframe->position); \
        int64_t prev_position = edl_to_local(prev_keyframe->position); \
 \
        config_class old_config, prev_config, next_config; \
        old_config.copy_from(config); \
        read_data(prev_keyframe); \
        prev_config.copy_from(config); \
        read_data(next_keyframe); \
        next_config.copy_from(config); \
 \
        config.interpolate(prev_config,  \
                next_config,  \
                (next_position == prev_position) ? \
                        get_source_position() : \
                        prev_position, \
                (next_position == prev_position) ? \
                        get_source_position() + 1 : \
                        next_position, \
                get_source_position()); \
 \
        if(!config.equivalent(old_config)) \
                return 1; \
        else \
                return 0; \
}






class PluginClient
{
public:
        PluginClient(PluginServer *server);
        virtual ~PluginClient();

        
// Queries for the plugin server.
        virtual int is_realtime();
        virtual int is_audio();
        virtual int is_video();
        virtual int is_fileio();
        virtual int is_theme();
        virtual int uses_gui();
        virtual int is_multichannel();
        virtual int is_synthesis();
        virtual int is_transition();
        virtual char* plugin_title();   // return the title of the plugin
        virtual VFrame* new_picon();
        virtual Theme* new_theme();
// Get theme being used by Cinelerra currently.  Used by all plugins.
        Theme* get_theme();






// Non realtime signal processors define these.
// Give the samplerate of the output for a non realtime plugin.
// For realtime plugins give the requested samplerate.
        virtual int get_samplerate();
// Give the framerate of the output for a non realtime plugin.
// For realtime plugins give the requested framerate.
        virtual double get_framerate();
        virtual int delete_nonrealtime_parameters();
        virtual int start_plugin();         // run a non realtime plugin
        virtual int get_parameters();     // get information from user before non realtime processing
        virtual int64_t get_in_buffers(int64_t recommended_size);  // return desired size for input buffers
        virtual int64_t get_out_buffers(int64_t recommended_size);     // return desired size for output buffers
        virtual int start_loop();
        virtual int process_loop();
        virtual int stop_loop();




// Realtime commands for signal processors.
// These must be defined by the plugin itself.
        virtual int set_string();             // Set the string identifying the plugin to modules and patches.
// cause the plugin to show the gui
        virtual int show_gui();               
// cause the plugin to hide the gui
        void client_side_close();
        void update_display_title();
// Raise the GUI
        virtual void raise_window() {};
        virtual void update_gui() {};
        virtual void save_data(KeyFrame *keyframe) {};    // write the plugin settings to text in text format
        virtual void read_data(KeyFrame *keyframe) {};    // read the plugin settings from the text
        int send_hide_gui();                                    // should be sent when the GUI recieves a close event from the user

        int get_configure_change();                             // get propogated configuration change from a send_configure_change

// Called by plugin server to update GUI with rendered data.
        virtual void plugin_render_gui(void *data) {};
        virtual void plugin_render_gui(void *data, int size) {};
        virtual int plugin_process_loop(VFrame **buffers, int64_t &write_length) { return 1; };
        virtual int plugin_process_loop(double **buffers, int64_t &write_length) { return 1; };
// get parameters depending on video or audio
        virtual int init_realtime_parameters();     
// release objects which are required after playback stops
        virtual void render_stop() {};
        int get_gui_status();
        char* get_gui_string();

// Used by themes
// Used by plugins which need to know where they are.
        char* get_path();

// Return keyframe objects.  The position in the resulting object 
// is relative to the EDL rate.  This is the only way to avoid copying the
// data for every frame.
// If the result is the default keyframe, the keyframe's position is 0.
// position - relative to EDL rate or local rate to allow simple 
//     passing of get_source_position.
//     If -1 the tracking position in the edl is used.
// is_local - if 1, the position is converted to the EDL rate.
        KeyFrame* get_prev_keyframe(int64_t position, int is_local = 1);
        KeyFrame* get_next_keyframe(int64_t position, int is_local = 1);
// get current camera and projector position
        void get_camera(float *x, float *y, float *z, int64_t position);
        void get_projector(float *x, float *y, float *z, int64_t position);
// When this plugin is adjusted, propogate parameters back to EDL and virtual
// console.  This gets a keyframe from the EDL, with the position set to the
// EDL tracking position.
        int send_configure_change();                            


// Called from process_buffer
// Returns 1 if a GUI is open so OpenGL routines can determine if
// they can run.
        int gui_open();



// Length of source.  For effects it's the plugin length.  For transitions
// it's the transition length.  Relative to the requested rate.
// The only way to get smooth interpolation is to make all position queries
// relative to the requested rate.
        int64_t get_total_len();

// For realtime plugins gets the lowest sample of the plugin in the requested
// rate.  For others it's the start of the EDL selection in the EDL rate.
        int64_t get_source_start();

// Convert the position relative to the requested rate to the position 
// relative to the EDL rate.  If the argument is < 0, it is not changed.
// Used for interpreting keyframes.
        virtual int64_t local_to_edl(int64_t position);

// Convert the EDL position to the local position.
        virtual int64_t edl_to_local(int64_t position);

// For transitions the source_position is the playback position relative
// to the start of the transition.
// For realtime effects, the start of the most recent process_buffer in forward
// and the end of the range to process in reverse.  Relative to start of EDL in
// the requested rate.
        int64_t get_source_position();

// Get the EDL Session.  May return 0 if the server has no edl.
        EDLSession* get_edlsession();


// Get the direction of the most recent process_buffer
        int get_direction();

// Plugin must call this before performing OpenGL operations.
// Returns 1 if the user supports opengl buffers.
        int get_use_opengl();

// Get total tracks to process
        int get_total_buffers();

// Get size of buffer to fill in non-realtime plugin
        int get_buffer_size();

// Get interpolation used by EDL from overlayframe.inc
        int get_interpolation_type();

// Get the values from the color picker
        float get_red();
        float get_green();
        float get_blue();



// Operations for file handlers
        virtual int open_file() { return 0; };
        virtual int get_audio_parameters() { return 0; };
        virtual int get_video_parameters() { return 0; };
        virtual int check_header(char *path) { return 0; };
        virtual int open_file(char *path, int wr, int rd) { return 1; };
        virtual int close_file() { return 0; };





// All plugins define these.
        virtual int load_defaults();       // load default settings for the plugin
        virtual int save_defaults();      // save the current settings as defaults




// Non realtime operations for signal processors.
        virtual int plugin_start_loop(int64_t start, 
                int64_t end, 
                int64_t buffer_size, 
                int total_buffers);
        int plugin_stop_loop();
        int plugin_process_loop();
        MainProgressBar* start_progress(char *string, int64_t length);
// get samplerate of EDL
        int get_project_samplerate();
// get framerate of EDL
        double get_project_framerate();
// Total number of processors - 1
        int get_project_smp();
        int get_aspect_ratio(float &aspect_w, float &aspect_h);


        int write_frames(int64_t total_frames);  // returns 1 for failure / tells the server that all output channel buffers are ready to go
        int write_samples(int64_t total_samples);  // returns 1 for failure / tells the server that all output channel buffers are ready to go
        virtual int plugin_get_parameters();
        char* get_defaultdir();     // Directory defaults should be stored in
        void set_interactive();

// Realtime operations.
        int reset();
        virtual int plugin_command_derived(int plugin_command) {}; // Extension of plugin_run for derived plugins
        int plugin_get_range();
        int plugin_init_realtime(int realtime_priority, 
                int total_in_buffers,
                int buffer_size);



// create pointers to buffers of the plugin's type before realtime rendering
        virtual int delete_buffer_ptrs();




// communication convenience routines for the base class
        int stop_gui_client();     
        int save_data_client();
        int load_data_client();
        int set_string_client(char *string);                // set the string identifying the plugin
        int send_cancelled();        // non realtime plugin sends when cancelled

// ================================= Buffers ===============================

// number of double buffers for each channel
        ArrayList<int> double_buffers_in;    
        ArrayList<int> double_buffers_out;
// When arming buffers need to know the offsets in all the buffers and which
// double buffers for each channel before rendering.
        ArrayList<int64_t> offset_in_render;
        ArrayList<int64_t> offset_out_render;
        ArrayList<int64_t> double_buffer_in_render;
        ArrayList<int64_t> double_buffer_out_render;
// total size of each buffer depends on if it's a master or node
        ArrayList<int64_t> realtime_in_size;
        ArrayList<int64_t> realtime_out_size;

// ================================= Automation ===========================

        ArrayList<PluginClientAuto> automation;

// ================================== Messages ===========================
        char gui_string[BCTEXTLEN];          // string identifying module and plugin
        int master_gui_on;              // Status of the master gui plugin
        int client_gui_on;              // Status of this client's gui

        int show_initially;             // set to show a realtime plugin initially
// range in project for processing
        int64_t start, end;                
        int interactive;                // for the progress bar plugin
        int success;
        int total_out_buffers;          // total send buffers allocated by the server
        int total_in_buffers;           // total recieve buffers allocated by the server
        int wr, rd;                     // File permissions for fileio plugins.

// These give the largest fragment the plugin is expected to handle.
// size of a send buffer to the server
        int64_t out_buffer_size;  
// size of a recieve buffer from the server
        int64_t in_buffer_size;   




// Direction of most recent process_buffer
        int direction;

// Operating system scheduling
        int realtime_priority;

// Position relative to start of EDL in requested rate.  Calculated for every process
// command.  Used for keyframes.
        int64_t source_position;
// For realtime plugins gets the lowest sample of the plugin in the requested
// rate.  For others it's always 0.
        int64_t source_start;
// Length of source.  For effects it's the plugin length.  For transitions
// it's the transition length.  Relative to the requested rate.
        int64_t total_len;
// Total number of processors available - 1
        int smp;  
        PluginServer *server;

private:

// File handlers:
//      Asset *asset;     // Point to asset structure in shared memory
};


#endif

---