Hello,
Ping?
On Fri, Nov 8, 2024 at 12:51 PM Manuel Lauss <manuel.la...@gmail.com> wrote:
>
> SAN FRME objects specify width/height as well as offsets from top/left.
> These offsets need to be taken into account for the diff buffers
> as well. Fixes playback of all SAN videos of "Shadows of the Empire",
> which have a constant top offset of 60 (640x272 video on a 640x480 window)
> and show tons of ghosting and block artifacts.
>
> Signed-off-by: Manuel Lauss <manuel.la...@gmail.com>
> ---
> libavcodec/sanm.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/libavcodec/sanm.c b/libavcodec/sanm.c
> index fcf6234d8a..8bcffb1e90 100644
> --- a/libavcodec/sanm.c
> +++ b/libavcodec/sanm.c
> @@ -913,8 +913,8 @@ static int old_codec47(SANMVideoContext *ctx, int top,
> int i, j;
> ptrdiff_t stride = ctx->pitch;
> uint8_t *dst = (uint8_t *)ctx->frm0 + left + top * stride;
> - uint8_t *prev1 = (uint8_t *)ctx->frm1;
> - uint8_t *prev2 = (uint8_t *)ctx->frm2;
> + uint8_t *prev1 = (uint8_t *)ctx->frm1 + left + top * stride;
> + uint8_t *prev2 = (uint8_t *)ctx->frm2 + left + top * stride;
> uint8_t auxcol[2];
> int tbl_pos = bytestream2_tell(&ctx->gb);
> int seq = bytestream2_get_le16(&ctx->gb);
> @@ -940,8 +940,8 @@ static int old_codec47(SANMVideoContext *ctx, int top,
> }
> if (!seq) {
> ctx->prev_seq = -1;
> - memset(prev1, auxcol[0], ctx->height * stride);
> - memset(prev2, auxcol[1], ctx->height * stride);
> + memset(prev1, auxcol[0], (ctx->height - top) * stride);
> + memset(prev2, auxcol[1], (ctx->height - top) * stride);
> }
>
> switch (compr) {
> --
> 2.47.0
>
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