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  • /*
     * Null Video Hook 
     * Copyright (c) 2002 Philip Gladstone
     *
     * This library is free software; you can redistribute it and/or
     * modify it under the terms of the GNU Lesser General Public
     * License as published by the Free Software Foundation; either
     * version 2 of the License, or (at your option) any later version.
     *
     * This library is distributed in the hope that it will be useful,
     * but WITHOUT ANY WARRANTY; without even the implied warranty of
     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     * Lesser General Public License for more details.
     *
     * You should have received a copy of the GNU Lesser General Public
     * License along with this library; if not, write to the Free Software
     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
     */
    #include <stdio.h>
    
    #include "framehook.h"
    
    typedef struct {
        int dummy;
    } ContextInfo;
    
    
    int Configure(void **ctxp, int argc, char *argv[])
    {
        fprintf(stderr, "Called with argc=%d\n", argc);
    
        *ctxp = av_mallocz(sizeof(ContextInfo));
        return 0;
    }
    
    void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, int height, INT64 pts)
    {
        ContextInfo *ci = (ContextInfo *) ctx;
        char *buf = 0;
        AVPicture picture1;
        AVPicture *pict = picture;
    
        (void) ci;
    
        if (pix_fmt != PIX_FMT_RGB24) {
            int size;
    
            size = avpicture_get_size(PIX_FMT_RGB24, width, height);
            buf = av_malloc(size);
    
            avpicture_fill(&picture1, buf, PIX_FMT_RGB24, width, height);
            if (img_convert(&picture1, PIX_FMT_RGB24, 
                            picture, pix_fmt, width, height) < 0) {
                av_free(buf);
                return;
            }
            pict = &picture1;
        }
    
        /* Insert filter code here */
    
        if (pix_fmt != PIX_FMT_RGB24) {
            if (img_convert(picture, pix_fmt, 
                            &picture1, PIX_FMT_RGB24, width, height) < 0) {
            }
        }
    
        av_free(buf);
    }
    
    /* To ensure correct typing */
    FrameHookConfigureFn ConfigureFn = Configure;
    FrameHookProcessFn ProcessFn = Process;