hvirtual/cinelerra/panautos.C

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#include "automation.inc"
#include "panauto.h"
#include "panautos.h"
#include "transportque.inc"

PanAutos::PanAutos(EDL *edl, Track *track)
 : Autos(edl, track)
{
        type = AUTOMATION_TYPE_PAN;
}

PanAutos::~PanAutos()
{
}


Auto* PanAutos::new_auto()
{
        return new PanAuto(edl, this);
}

void PanAutos::get_handle(int &handle_x,
                int &handle_y,
                int64_t position, 
                int direction,
                PanAuto* &previous,
                PanAuto* &next)
{
        previous = (PanAuto*)get_prev_auto(position, direction, (Auto* &)previous);
        next = (PanAuto*)get_next_auto(position, direction, (Auto* &)next);

// Constant
        if(previous->handle_x == next->handle_x &&
                previous->handle_y == next->handle_y)
        {
                handle_x = previous->handle_x;
                handle_y = previous->handle_y;
                return;
        }

// Interpolate
        int64_t total = labs(next->position - previous->position);
        double fraction;
        if(direction == PLAY_FORWARD)
        {
                fraction = (double)(position - previous->position) / total;
        }
        else
        {
                fraction = (double)(previous->position - position) / total;
        }

        handle_x = (int)(previous->handle_x + (next->handle_x - previous->handle_x) * fraction);
        handle_y = (int)(previous->handle_y + (next->handle_y - previous->handle_y) * fraction);
}

void PanAutos::dump()
{
        printf("        PanAutos::dump %p\n", this);
                printf("        Default: position %ld\n", default_auto->position);
                ((PanAuto*)default_auto)->dump();
        for(Auto* current = first; current; current = NEXT)
        {
                printf("        position %ld\n", current->position);
                ((PanAuto*)current)->dump();
        }
}

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