547765a93e
mtmd: add Gemma 4 audio conformer encoder support ( #21421 )
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* mtmd: add Gemma 4 audio conformer encoder support
Add audio processing for Gemma 4 E2B/E4B via a USM-style Conformer.
Architecture:
- 12-layer Conformer: FFN → Self-Attention → Causal Conv1D → FFN → Norm
- Subsampling Conv Projection: 2x Conv2D(stride=2) with LayerNorm
- Full self-attention with sinusoidal RPE and sliding window mask (24)
- Logit softcapping at 50.0, ClippableLinear clamping
- Output: 1024 → 1536 → RMSNorm → multimodal embedder
Mel preprocessing (dedicated mtmd_audio_preprocessor_gemma4a):
- HTK mel scale, 128 bins, magnitude STFT, mel_floor=1e-3
- Standard periodic Hann window (320 samples), zero-padded to FFT size
- Semicausal left-padding (frame_length/2 samples)
- Frame count matched to PyTorch (unfold formula)
- No pre-emphasis, no Whisper-style normalization
- Mel cosine similarity vs PyTorch: 0.9998
Key fixes:
- Tensor loading dedup: prevent get_tensor() from creating duplicate
entries in ctx_data. Fixed with std::set guard.
- ClippableLinear clamp_info loading moved after per-layer tensors.
- Sliding window mask (24 positions) matching PyTorch context_size.
- Skip Whisper normalization for Gemma4 mel output.
Tested on E2B and E4B with CPU and Vulkan backends.
Transcribes: "Glad to see things are going well and business is starting
to pick up" (matching ground truth).
Ref: #21325
2026-04-12 14:15:26 +02:00
871f1a2d2f
mtmd: add more sanity checks ( #21047 )
2026-03-27 11:00:52 +01:00
92f7da00b4
chore : correct typos [no ci] ( #20041 )
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* fix(docs): correct typos found during code review
Non-functional changes only:
- Fixed minor spelling mistakes in comments
- Corrected typos in user-facing strings
- No variables, logic, or functional code was modified.
Signed-off-by: Marcel Petrick <mail@marcelpetrick.it>
* Update docs/backend/CANN.md
Co-authored-by: Aaron Teo <taronaeo@gmail.com>
* Revert "Auxiliary commit to revert individual files from 846d1c301281178efbc6ce6060ad34c1ebe45af8"
This reverts commit 02fcf0c7db661d5ff3eff96b2b2db9fdb7213256.
* Update tests/test-backend-ops.cpp
Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>
* Update tests/test-backend-ops.cpp
Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>
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Signed-off-by: Marcel Petrick <mail@marcelpetrick.it>
Co-authored-by: Aaron Teo <taronaeo@gmail.com>
Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>
2026-03-05 08:50:21 +01:00
ccbc84a537
mtmd: mtmd_audio_streaming_istft ( #18645 )
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Change is decoupled from https://github.com/ggml-org/llama.cpp/pull/18641 .
[LFM2.5-Audio-1.5B](https://huggingface.co/LiquidAI/LFM2.5-Audio-1.5B )
needs streaming istft for generating output audio.
* add streaming ISTFT class (`mtmd_audio_streaming_istft`) with overlap-add for audio reconstruction
* replace global audio cache with per-instance cache, the model requires
two independent caches, for preprocessing (audio input) and for istft
(audio output).
* unified templated FFT/IFFT implementation supporting both forward and inverse transforms
2026-01-06 21:00:29 +01:00
8ea958d4d9
model : add ASR support for LFM2-Audio-1.5B (conformer) ( #18106 )
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* ASR with LFM2-Audio-1.5B
* Set rope_theta
* Fix comment
* Remove rope_theta setting
* Address PR feedback
* rename functions to conformer
* remove some redundant ggml_cont
* fix missing tensor
* add prefix "a." for conv tensors
* remove redundant reshape
* clean up
* add test model
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Co-authored-by: Tarek Dakhran <tarek@liquid.ai>
2025-12-19 00:18:01 +01:00
96a181a933
mtmd: refactor audio preprocessing ( #17978 )
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* mtmd: refactor audio preprocessing
* refactor
Co-authored-by: Tarek <tdakhran@users.noreply.github.com>
* wip
* wip (2)
* improve constructor
* fix use_natural_log
* fix padding for short input
* clean up
* remove need_chunking
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Co-authored-by: Tarek <tdakhran@users.noreply.github.com>
2025-12-15 14:16:52 +01:00
10961339b2
mtmd : move helpers to dedicated library ( ⚠️ breaking change) ( #13866 )
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* mtmd : move helpers to dedicated library
* fix server build
* rm leftover cmakelist code
2025-05-28 22:35:22 +02:00
797990c4bc
mtmd : add ultravox audio input ( #13623 )
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* convert ok, load ok
* warmup ok
* test
* still does not work?
* fix padding
* temporary give up
* fix merge conflict
* build_ultravox()
* rm test
* fix merge conflict
* add necessary mtmd APIs
* first working version (only 4s of audio)
* will this monster compile?
* fix compile
* please compile
* fPIC
* fix windows
* various fixes
* clean up audio_helpers
* fix conversion
* add some debug stuff
* long audio input ok
* adapt the api
* add --audio arg
* final touch UX
* add miniaudio to readme
* fix typo
* refactor kv metadata
* mtmd_default_marker()
2025-05-22 20:42:48 +02:00
Stephen Cox
Xuan-Son Nguyen
Marcel Petrick
Tarek Dakhran