Hello,
Ping?
On Fri, Nov 8, 2024 at 12:51 PM Manuel Lauss <manuel.la...@gmail.com> wrote:
>
> The codec47 header provides colors to use to clear the
> 2 difference buffers. This fixes artifacts (black hair, faces) in
> Curse of Monkey Island "CURSERNG.SAN" video.
>
> Signed-off-by: Manuel Lauss <manuel.la...@gmail.com>
> ---
> libavcodec/sanm.c | 9 ++++++---
> 1 file changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/libavcodec/sanm.c b/libavcodec/sanm.c
> index 936746ace4..fcf6234d8a 100644
> --- a/libavcodec/sanm.c
> +++ b/libavcodec/sanm.c
> @@ -915,13 +915,16 @@ static int old_codec47(SANMVideoContext *ctx, int top,
> 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 auxcol[2];
> int tbl_pos = bytestream2_tell(&ctx->gb);
> int seq = bytestream2_get_le16(&ctx->gb);
> int compr = bytestream2_get_byte(&ctx->gb);
> int new_rot = bytestream2_get_byte(&ctx->gb);
> int skip = bytestream2_get_byte(&ctx->gb);
>
> - bytestream2_skip(&ctx->gb, 9);
> + bytestream2_skip(&ctx->gb, 7);
> + auxcol[0] = bytestream2_get_byteu(&ctx->gb);
> + auxcol[1] = bytestream2_get_byteu(&ctx->gb);
> decoded_size = bytestream2_get_le32(&ctx->gb);
> bytestream2_skip(&ctx->gb, 8);
>
> @@ -937,8 +940,8 @@ static int old_codec47(SANMVideoContext *ctx, int top,
> }
> if (!seq) {
> ctx->prev_seq = -1;
> - memset(prev1, 0, ctx->height * stride);
> - memset(prev2, 0, ctx->height * stride);
> + memset(prev1, auxcol[0], ctx->height * stride);
> + memset(prev2, auxcol[1], ctx->height * stride);
> }
>
> switch (compr) {
> --
> 2.47.0
>
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