primecorder.c

#include <libavutil/pixdesc.h>
#include <libavcodec/avcodec.h>
#include <libavutil/hwcontext_drm.h>
#include <libavutil/hwcontext.h>
#include <libavutil/buffer.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>

struct primecorder {
    AVBufferRef *hw_context;
};
    



static int device_open(AVBufferRef **ctx, const char *filename) {
    return av_hwdevice_ctx_create(ctx, AV_HWDEVICE_TYPE_DRM, filename, NULL, 0);
}

static off_t sizeof_fd(int fd) {
    return lseek(fd, 0, SEEK_END);
}


    

int main() {
    AVBufferRef *hw_context = NULL;
    
    printf("%d\n", device_open(&hw_context, "/dev/dri/renderD128"));
    AVHWFramesConstraints *constraints = av_hwdevice_get_hwframe_constraints(hw_context, NULL);
    if (constraints==NULL){
        printf("error getting constraints");
    }

}