[FFmpeg-devel] [PATCH 1/2] avcodec/jpegtables: Mark jpegtables as hidden

[Andreas Rheinhardt]

Andreas Rheinhardt:
> These tables are not exported as avpriv symbols, but instead
> included into every library using them. Therefore they
> can be mark with the hidden elf visibility. For certain arches
> this is necessary in order to avoid building suboptimal code;
> for other arches it just allows the compiler to simplify accesses
> like ff_mjpeg_bits_dc_luminance + 1 because the "+ 1" can be baked
> into the offset.
> 
> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>
> ---
>  libavcodec/jpegtables.h | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/libavcodec/jpegtables.h b/libavcodec/jpegtables.h
> index 49b5ecdeb0..39baec3efb 100644
> --- a/libavcodec/jpegtables.h
> +++ b/libavcodec/jpegtables.h
> @@ -23,6 +23,9 @@
>  
>  #include <stdint.h>
>  
> +#include "libavutil/attributes_internal.h"
> +
> +FF_VISIBILITY_PUSH_HIDDEN
>  extern const uint8_t ff_mjpeg_bits_dc_luminance[];
>  extern const uint8_t ff_mjpeg_val_dc[];
>  
> @@ -33,5 +36,6 @@ extern const uint8_t ff_mjpeg_val_ac_luminance[];
>  
>  extern const uint8_t ff_mjpeg_bits_ac_chrominance[];
>  extern const uint8_t ff_mjpeg_val_ac_chrominance[];
> +FF_VISIBILITY_POP_HIDDEN
>  
>  #endif /* AVCODEC_JPEGTABLES_H */

Will apply this patchset tomorrow unless there are objections.

- Andreas