[Libjpeg-devel-6x] Possible memory leak in

[Justin W. <phi...@gm...>]

I believe there is a memory leak in the jpeg_write_scanlines() function. The
code below takes a frame image from a dc1394 camera and turns it into a jpeg
inside a while loop. The memory usage increases 0.1% about every 5 seconds
on an embedded ARM processor with very little memory and processor power.

  static struct jpeg_compress_struct cinfo;
  static struct jpeg_error_mgr jerr;
  static JSAMPROW row_pointer[1];
  cinfo.err = jpeg_std_error( &jerr );
  jpeg_create_compress(&cinfo);

  while( !pglobal->stop ) {
    pthread_mutex_lock( &pglobal->db );

    err = dc1394_capture_dequeue(camera, DC1394_CAPTURE_POLICY_WAIT,
&frames[0]);
    memcpy(latestFrame, frames[0]->image, frameWidth * frameHeight);

    static unsigned char *jpeg = NULL;
    static long unsigned jpegSize = 0;
    jpeg_mem_dest(&cinfo, &jpeg, &jpegSize);

    cinfo.image_width = frameWidth;
    cinfo.image_height = frameHeight;
    cinfo.input_components = 1;
    cinfo.in_color_space = JCS_GRAYSCALE;

    jpeg_set_defaults( &cinfo );
    jpeg_start_compress( &cinfo, TRUE );
    while( cinfo.next_scanline < cinfo.image_height ) {
        row_pointer[0] = &latestFrame[ cinfo.next_scanline *
cinfo.image_width *  cinfo.input_components];
        jpeg_write_scanlines( &cinfo, row_pointer, 1 );
    }
    jpeg_finish_compress( &cinfo );

    err = dc1394_capture_enqueue(camera, frames[0]);

    pglobal->size = jpegSize;
    memcpy(pglobal->buf, jpeg, pglobal->size);

    pthread_cond_broadcast(&pglobal->db_update);

    pthread_mutex_unlock( &pglobal->db );

    if(trigger==0)usleep(1000*delay);
  }
  jpeg_destroy_compress( &cinfo );

If I comment out the code from "jpeg_start_compress( &cinfo, TRUE );" to
"jpeg_finish_compress( &cinfo );" (like below) the memory usage stays
consistent.
    //jpeg_set_defaults( &cinfo );
    //jpeg_start_compress( &cinfo, TRUE );
    //while( cinfo.next_scanline < cinfo.image_height ) {
    //    row_pointer[0] = &latestFrame[ cinfo.next_scanline *
cinfo.image_width *  cinfo.input_components];
    //    jpeg_write_scanlines( &cinfo, row_pointer, 1 );
    //}
    //jpeg_finish_compress( &cinfo );

Any help would be appreciated,
-Justin