sleepy/llama.cpp
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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

---------

Co-authored-by: Tarek <tdakhran@users.noreply.github.com>
This commit is contained in:
Xuan-Son Nguyen
2025-12-15 14:16:52 +01:00
committed by GitHub
parent 4a4f7e6550
commit 96a181a933
5 changed files with 379 additions and 596 deletions
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tools/mtmd/clip.cpp
+16 -3
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@@ -1170,11 +1170,15 @@ struct clip_model_loader {
model.proj_type == PROJECTOR_TYPE_VOXTRAL ||
model.proj_type == PROJECTOR_TYPE_GLMA;
get_u32(KEY_A_PROJ_STACK_FACTOR, hparams.proj_stack_factor, require_stack);
if (hparams.n_mel_bins != 128) {
throw std::runtime_error(string_format("%s: only 128 mel bins are supported for ultravox\n", __func__));
}
hparams.ffn_op = FFN_GELU_ERF;
log_ffn_op = "gelu_erf"; // temporary solution for logging
// audio preprocessing params
hparams.audio_chunk_len = 30; // in seconds
hparams.audio_sample_rate = 16000;
hparams.audio_n_fft = 400;
hparams.audio_window_len = 400;
hparams.audio_hop_len = 160;
} break;
default:
break;
@@ -1212,6 +1216,11 @@ struct clip_model_loader {
LOG_INF("\n--- audio hparams ---\n");
LOG_INF("%s: n_mel_bins: %d\n", __func__, hparams.n_mel_bins);
LOG_INF("%s: proj_stack_factor: %d\n", __func__, hparams.proj_stack_factor);
LOG_INF("%s: audio_chunk_len: %d\n", __func__, hparams.audio_chunk_len);
LOG_INF("%s: audio_sample_rate: %d\n", __func__, hparams.audio_sample_rate);
LOG_INF("%s: audio_n_fft: %d\n", __func__, hparams.audio_n_fft);
LOG_INF("%s: audio_window_len: %d\n", __func__, hparams.audio_window_len);
LOG_INF("%s: audio_hop_len: %d\n", __func__, hparams.audio_hop_len);
}
LOG_INF("\n");
LOG_INF("%s: model size: %.2f MiB\n", __func__, model_size / 1024.0 / 1024.0);
@@ -3478,3 +3487,7 @@ void clip_image_f32_batch_add_mel(struct clip_image_f32_batch * batch, int n_mel
batch->entries.push_back(clip_image_f32_ptr(audio));
batch->is_audio = true;
}
const clip_hparams * clip_get_hparams(const struct clip_ctx * ctx) {
return &ctx->model.hparams;
}