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ffv1enc_vulkan: fix encoding with large contexts

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When RGB_LINECACHE == 2, then top2 is not the current line.
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Lynne 2025-12-04 16:47:00 +01:00
parent 4b6e40a298
commit f80addbb07
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libavcodec/vulkan/ffv1_common.comp
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@ -124,8 +124,12 @@ ivec2 get_pred(readonly uimage2D pred, ivec2 sp, ivec2 off,
}
base += quant_table[quant_table_idx][3][(cur2 - cur) & MAX_QUANT_TABLE_MASK];
#if RGB_LINECACHE == 2
/* top-2 became current upon swap */
TYPE top2 = TYPE(imageLoad(pred, sp + LADDR(off))[comp]);
#else
TYPE top2 = TYPE(imageLoad(pred, sp + LADDR(off + ivec2(0, -2)))[comp]);
#endif
base += quant_table[quant_table_idx][4][(top2 - top[1]) & MAX_QUANT_TABLE_MASK];
}