mtmd: correct get_n_pos / get_decoder_pos (#22175)

tools/mtmd/mtmd.h

@@ -112,20 +112,20 @@ MTMD_API void mtmd_free(mtmd_context * ctx);
 
 // whether we need to set non-causal mask before llama_decode
 // if chunk is nullptr, we assume the default case where chunk is an image chunk
-MTMD_API bool mtmd_decode_use_non_causal(mtmd_context * ctx, const mtmd_input_chunk * chunk);
+MTMD_API bool mtmd_decode_use_non_causal(const mtmd_context * ctx, const mtmd_input_chunk * chunk);
 
 // whether the current model use M-RoPE for llama_decode
-MTMD_API bool mtmd_decode_use_mrope(mtmd_context * ctx);
+MTMD_API bool mtmd_decode_use_mrope(const mtmd_context * ctx);
 
 // whether the current model supports vision input
-MTMD_API bool mtmd_support_vision(mtmd_context * ctx);
+MTMD_API bool mtmd_support_vision(const mtmd_context * ctx);
 
 // whether the current model supports audio input
-MTMD_API bool mtmd_support_audio(mtmd_context * ctx);
+MTMD_API bool mtmd_support_audio(const mtmd_context * ctx);
 
 // get audio sample rate in Hz, for example 16000 for Whisper
 // return -1 if audio is not supported
-MTMD_API int mtmd_get_audio_sample_rate(mtmd_context * ctx);
+MTMD_API int mtmd_get_audio_sample_rate(const mtmd_context * ctx);
 
 // mtmd_bitmap
 //