On Mon, Jul 10, 2017 at 8:19 AM, Michael Niedermayer
<mich...@niedermayer.cc> wrote:
> Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
> ---
> libavcodec/mpegvideo.c | 15 ++++++++++++++-
> 1 file changed, 14 insertions(+), 1 deletion(-)
>
> diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
> index e29558b3a2..574b3854e0 100644
> --- a/libavcodec/mpegvideo.c
> +++ b/libavcodec/mpegvideo.c
> @@ -495,7 +495,20 @@ int ff_mpeg_update_thread_context(AVCodecContext *dst,
> // in that case dst may need a reinit
> if (!s->context_initialized) {
> int err;
> - memcpy(s, s1, sizeof(MpegEncContext));
> +#define COPY(x) s->x = s1->x;
> +#define COPYR(a, b) memcpy(&s->a, &s1->a, ((uint8_t*)&s->b) -
> ((uint8_t*)&s->a))
> + COPYR(h263_aic, qscale);
> + COPYR(lambda, mv_dir);
> + COPYR(no_rounding, dest);
> + COPYR(mb_index2xy, resync_mb_x);
> + COPYR(next_p_frame_damaged, h263_aic_dir);
> + COPYR(h263_slice_structured, mcsel);
> + COPYR(quant_precision, first_slice_line);
> + COPYR(flipflop_rounding, gb);
> + COPYR(gop_picture_number, picture_structure);
> + COPYR(picture_structure, pblocks);
> + COPYR(decode_mb, er);
> + COPYR(error_rate, noise_reduction);
Of course this is ugly.
What about conditional memcpy, e.g if dst_byte != src_byte then
dst_byte = src_byte?
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