hvirtual/plugins/loopvideo/loopvideo.C

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#include "bcdisplayinfo.h"
#include "clip.h"
#include "bchash.h"
#include "filexml.h"
#include "guicast.h"
#include "language.h"
#include "pluginvclient.h"
#include "transportque.h"

#include <string.h>

class LoopVideo;

class LoopVideoConfig
{
public:
        LoopVideoConfig();
        int64_t frames;
};


class LoopVideoFrames : public BC_TextBox
{
public:
        LoopVideoFrames(LoopVideo *plugin,
                int x,
                int y);
        int handle_event();
        LoopVideo *plugin;
};

class LoopVideoWindow : public BC_Window
{
public:
        LoopVideoWindow(LoopVideo *plugin, int x, int y);
        ~LoopVideoWindow();
        void create_objects();
        int close_event();
        LoopVideo *plugin;
        LoopVideoFrames *frames;
};

PLUGIN_THREAD_HEADER(LoopVideo, LoopVideoThread, LoopVideoWindow)

class LoopVideo : public PluginVClient
{
public:
        LoopVideo(PluginServer *server);
        ~LoopVideo();

        PLUGIN_CLASS_MEMBERS(LoopVideoConfig, LoopVideoThread)

        int load_defaults();
        int save_defaults();
        void save_data(KeyFrame *keyframe);
        void read_data(KeyFrame *keyframe);
        void update_gui();
        int is_realtime();
        int is_synthesis();
        int process_buffer(VFrame *frame,
                int64_t start_position,
                double frame_rate);
};







REGISTER_PLUGIN(LoopVideo);



LoopVideoConfig::LoopVideoConfig()
{
        frames = 30;
}





LoopVideoWindow::LoopVideoWindow(LoopVideo *plugin, int x, int y)
 : BC_Window(plugin->gui_string, 
        x, 
        y, 
        210, 
        160, 
        200, 
        160, 
        0, 
        0,
        1)
{
        this->plugin = plugin;
}

LoopVideoWindow::~LoopVideoWindow()
{
}

void LoopVideoWindow::create_objects()
{
        int x = 10, y = 10;

        add_subwindow(new BC_Title(x, y, _("Frames to loop:")));
        y += 20;
        add_subwindow(frames = new LoopVideoFrames(plugin, 
                x, 
                y));
        show_window();
        flush();
}

WINDOW_CLOSE_EVENT(LoopVideoWindow)


PLUGIN_THREAD_OBJECT(LoopVideo, LoopVideoThread, LoopVideoWindow)






LoopVideoFrames::LoopVideoFrames(LoopVideo *plugin, 
        int x, 
        int y)
 : BC_TextBox(x, 
        y, 
        100,
        1,
        plugin->config.frames)
{
        this->plugin = plugin;
}

int LoopVideoFrames::handle_event()
{
        plugin->config.frames = atol(get_text());
        plugin->config.frames = MAX(1, plugin->config.frames);
        plugin->send_configure_change();
        return 1;
}









LoopVideo::LoopVideo(PluginServer *server)
 : PluginVClient(server)
{
        PLUGIN_CONSTRUCTOR_MACRO
}


LoopVideo::~LoopVideo()
{
        PLUGIN_DESTRUCTOR_MACRO
}

char* LoopVideo::plugin_title() { return N_("Loop video"); }
int LoopVideo::is_realtime() { return 1; }
int LoopVideo::is_synthesis() { return 1; }

#include "picon_png.h"
NEW_PICON_MACRO(LoopVideo)

SHOW_GUI_MACRO(LoopVideo, LoopVideoThread)

RAISE_WINDOW_MACRO(LoopVideo)

SET_STRING_MACRO(LoopVideo);


int LoopVideo::process_buffer(VFrame *frame,
                int64_t start_position,
                double frame_rate)
{
        int64_t current_loop_position;

// Truncate to next keyframe
        if(get_direction() == PLAY_FORWARD)
        {
// Get start of current loop
                KeyFrame *prev_keyframe = get_prev_keyframe(start_position);
                int64_t prev_position = edl_to_local(prev_keyframe->position);
                if(prev_position == 0)
                        prev_position = get_source_start();
                read_data(prev_keyframe);

// Get start of fragment in current loop
                current_loop_position = prev_position +
                        ((start_position - prev_position) % 
                                config.frames);
                while(current_loop_position < prev_position) current_loop_position += config.frames;
                while(current_loop_position >= prev_position + config.frames) current_loop_position -= config.frames;
        }
        else
        {
                KeyFrame *prev_keyframe = get_next_keyframe(start_position);
                int64_t prev_position = edl_to_local(prev_keyframe->position);
                if(prev_position == 0)
                        prev_position = get_source_start() + get_total_len();
                read_data(prev_keyframe);

                current_loop_position = prev_position - 
                        ((prev_position - start_position) %
                                  config.frames);
                while(current_loop_position <= prev_position - config.frames) current_loop_position += config.frames;
                while(current_loop_position > prev_position) current_loop_position -= config.frames;
        }


// printf("LoopVideo::process_buffer 100 %lld %lld %lld %d\n", 
// current_position, current_loop_position, current_loop_end, fragment_size);
        read_frame(frame,
                0,
                current_loop_position,
                frame_rate);

        return 0;
}




int LoopVideo::load_configuration()
{
        KeyFrame *prev_keyframe;
        int64_t old_frames = config.frames;
        prev_keyframe = get_prev_keyframe(get_source_position());
        read_data(prev_keyframe);
        config.frames = MAX(config.frames, 1);
        return old_frames != config.frames;
}

int LoopVideo::load_defaults()
{
        char directory[BCTEXTLEN];
// set the default directory
        sprintf(directory, "%sloopaudio.rc", BCASTDIR);

// load the defaults
        defaults = new BC_Hash(directory);
        defaults->load();

        config.frames = defaults->get("FRAMES", config.frames);
        return 0;
}

int LoopVideo::save_defaults()
{
        defaults->update("FRAMES", config.frames);
        defaults->save();
        return 0;
}

void LoopVideo::save_data(KeyFrame *keyframe)
{
        FileXML output;

// cause data to be stored directly in text
        output.set_shared_string(keyframe->data, MESSAGESIZE);
        output.tag.set_title("LOOPVIDEO");
        output.tag.set_property("FRAMES", config.frames);
        output.append_tag();
        output.tag.set_title("/LOOPVIDEO");
        output.append_tag();
        output.terminate_string();
}

void LoopVideo::read_data(KeyFrame *keyframe)
{
        FileXML input;

        input.set_shared_string(keyframe->data, strlen(keyframe->data));

        int result = 0;

        while(!input.read_tag())
        {
                if(input.tag.title_is("LOOPVIDEO"))
                {
                        config.frames = input.tag.get_property("FRAMES", config.frames);
                }
        }
}

void LoopVideo::update_gui()
{
        if(thread)
        {
                load_configuration();
                thread->window->lock_window();
                thread->window->frames->update(config.frames);
                thread->window->unlock_window();
        }
}

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