Thread: How to pass member of struct into jpeg_finish_compress() & jpeg_destroy_compress()?

How to fix this?

Code:

...
typedef struct JPEG_DATA
{
    struct jpeg_decompress_struct d_info;
    struct jpeg_compress_struct c_info;

} JPEG_DATA, *pJPEG_DATA;
...

int main(int argc, char **argv)
{
JPEG_DATA data;
prepare_read_jpg_file(argv[2], &data);
read_jpg_file(&data);
jpeg_finish_compress(&data.d_info); // WARNING HERE
jpeg_destroy_compress(&data.d_info);
return 0;
}

warning: passing argument 1 of 'jpeg_finish_compress' from incompatible pointer type

The problem is in jpeg_finish_compress(). How to pass the pointer?
By default in example they do it like this:

Code:

(void) jpeg_finish_decompress(&cinfo);
jpeg_destroy_decompress(&cinfo);

But I use the member d_info in data struct. There is also a not:

In library there is a definition in file jpeglib.h:

Code:

EXTERN(void) jpeg_finish_compress (j_compress_ptr cinfo);

jpeglib.h|954|note: expected 'j_compress_ptr' but argument is of type 'struct jpeg_decompress_struct *'|

Thank you man!

Anyway, it crashes on the line with

Code:

(void) jpeg_finish_decompress(&data.d_info);

Any idea why this happens?

Code:

    JPEG_DATA data;
    data.quality=95;
    data.source_type=st;
    data.target_type=tt;
    data.source_color_space=scs;
    data.target_color_space=tcs;

    prepare_read_jpg_file(argv[2], &data);
    read_jpg_file(&data);
    (void) jpeg_finish_decompress(&data.d_info);
    jpeg_destroy_decompress(&data.d_info);

    prepare_write_jpg_file(argv[3], &data);
//    write_jpg_file(&data);

    jpeg_finish_compress(&data.c_info);
    jpeg_destroy_compress(&data.c_info);

They normally use style like this:

Code:

(void) jpeg_finish_decompress(&cinfo);

but when I pass &data.d_info it crashes.

I also tested to move the fclose after the clean rutines:

Code:

(void) jpeg_finish_decompress(&data.d_info);
jpeg_destroy_decompress(&data.d_info);
fclose(data.fpr);

But still crashes

Finally I solve it! The problem is in Error manager, variable jerr; It needed to be moved under data struct.