b10783

mtmd : add const in various places (#28307)

• mtmd : mark context as const in more methods

Mark mtmd_context as const in:

• mtmd_bitmap_init_lazy
• mtmd_tokenize
• mtmd_tokenize_from_parts
• mtmd_helper_support_video
• mtmd_helper_bitmap_init_from_file
• mtmd_helper_bitmap_init_from_buf
• mtmd_helper_video_init
• mtmd_helper_video_init_from_buf
• mtmd_helper_model_can_chat

The tokenization functions in particular are useful to have marked
const, as that allows more easily telling the compiler that we can
safely tokenize from multiple threads (mtmd_tokenize is already
documented as thread-safe, this just reifies that in the signature).

• mtmd : mark tokenization input pointer as const

Mark the bitmaps and parts pointers in mtmd_tokenize and
mtmd_tokenize_from_parts as const. This allows more easily calling
these with immutable arrays / vectors.

• mtmd : mark llama_context as const in mtmd_helper_model_can_chat

Website:

• https://llama.app

Attestations:

• https://github.com/ggml-org/llama.cpp/attestations/44969990

macOS/iOS:

• macOS Apple Silicon (arm64)
• macOS Apple Silicon (arm64, KleidiAI enabled) DISABLED
• macOS Intel (x64)
• iOS XCFramework

Linux:

• Ubuntu x64 (CPU)
• Ubuntu arm64 (CPU)
• Ubuntu s390x (CPU)
• Ubuntu x64 (Vulkan)
• Ubuntu arm64 (Vulkan)
• Ubuntu x64 (ROCm 10.0)
• Ubuntu x64 (OpenVINO)
• Ubuntu x64 (SYCL FP32)
• Ubuntu x64 (SYCL FP16)

Android:

• Android arm64 (CPU)

Windows:

• Windows x64 (CPU)
• Windows arm64 (CPU)
• Windows arm64 (OpenCL Adreno)
• Windows x64 (CUDA 12) - CUDA 12.4 DLLs
• Windows x64 (CUDA 13) - CUDA 13.3 DLLs
• Windows arm64 (CUDA 13) (preview) - CUDA 13.4 DLLs
• Windows x64 (Vulkan)
• Windows x64 (OpenVINO)
• Windows x64 (SYCL)
• Windows x64 (ROCm 10.0)

openEuler:

• DISABLED
• openEuler x86 (310p)
• openEuler x86 (910b, ACL Graph)
• openEuler aarch64 (310p)
• openEuler aarch64 (910b, ACL Graph)

UI:

• UI