[FFmpeg-devel] [PATCH] avcodec/sanm: handle xpal cmd 0 (PR #20300)

[Manuel Lauss]

PR #20300 opened by Manuel Lauss (mlauss2)
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20300
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20300.patch

It's like cmd 2. Fixes the Rebel Assault 1 Intro Video "C1BLOCK.ANM"
crossfade from planet view to space view and subsequent wrong colors.

Signed-off-by: Manuel Lauss <manuel.lauss at gmail.com>


From 4012c92c9b05b26df88c31f1497033a81ea73025 Mon Sep 17 00:00:00 2001
From: Manuel Lauss <manuel.lauss at gmail.com>
Date: Thu, 21 Aug 2025 09:44:25 +0200
Subject: [PATCH] avcodec/sanm: handle xpal cmd 0

It's like cmd 2. Fixes the Rebel Assault 1 Intro Video "C1BLOCK.ANM"
crossfade from planet view to space view and subsequent wrong colors.

Signed-off-by: Manuel Lauss <manuel.lauss at gmail.com>
---
 libavcodec/sanm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/sanm.c b/libavcodec/sanm.c
index e4308af647..4cf1ac5221 100644
--- a/libavcodec/sanm.c
+++ b/libavcodec/sanm.c
@@ -1888,7 +1888,7 @@ static int process_xpal(SANMVideoContext *ctx, int size)
             }
             *pal++ = 0xFFU << 24 | c[0] << 16 | c[1] << 8 | c[2];
         }
-    } else if (cmd == 2) {
+    } else if (cmd == 0 || cmd == 2) {
         if (size < PALETTE_DELTA * 2 + 4) {
             av_log(ctx->avctx, AV_LOG_ERROR,
                    "Incorrect palette change block size %"PRIu32".\n", size);
-- 
2.49.1