Add a rustified progress callback.

[marmistrz]

This is a proof-of-concept. I will extend the docs once I get maintainer feedback.

Known issues

• the callback is not called as frequently as the progress print. See the example output:

  [02:11:22 PM] $ cargo run -- 2830-3980-0043.wav ~/build/whisper.cpp/models/ggml-base.en.bin
  Finished dev [unoptimized + debuginfo] target(s) in 0.14s
   Running `target/debug/full_usage 2830-3980-0043.wav /home/marcin/build/whisper.cpp/models/ggml-base.en.bin`
  whisper_init_from_file_no_state: loading model from '/home/marcin/build/whisper.cpp/models/ggml-base.en.bin'
  whisper_model_load: loading model
  whisper_model_load: n_vocab       = 51864
  whisper_model_load: n_audio_ctx   = 1500
  whisper_model_load: n_audio_state = 512
  whisper_model_load: n_audio_head  = 8
  whisper_model_load: n_audio_layer = 6
  whisper_model_load: n_text_ctx    = 448
  whisper_model_load: n_text_state  = 512
  whisper_model_load: n_text_head   = 8
  whisper_model_load: n_text_layer  = 6
  whisper_model_load: n_mels        = 80
  whisper_model_load: ftype         = 1
  whisper_model_load: qntvr         = 0
  whisper_model_load: type          = 2
  whisper_model_load: mem required  =  310.00 MB (+    6.00 MB per decoder)
  whisper_model_load: adding 1607 extra tokens
  whisper_model_load: model ctx     =  140.66 MB
  whisper_model_load: model size    =  140.54 MB
  whisper_init_state: kv self size  =    5.25 MB
  whisper_init_state: kv cross size =   17.58 MB
  Progress: 0%
  whisper_full_with_state: progress =   5%
  whisper_full_with_state: progress =  10%
  whisper_full_with_state: progress =  15%
  whisper_full_with_state: progress =  20%
  whisper_full_with_state: progress =  25%
  whisper_full_with_state: progress =  30%
  whisper_full_with_state: progress =  35%
  whisper_full_with_state: progress =  40%
  whisper_full_with_state: progress =  45%
  whisper_full_with_state: progress =  50%
  whisper_full_with_state: progress =  55%
  whisper_full_with_state: progress =  60%
  whisper_full_with_state: progress =  65%
  whisper_full_with_state: progress =  70%
  whisper_full_with_state: progress =  75%
  whisper_full_with_state: progress =  80%
  whisper_full_with_state: progress =  85%
  whisper_full_with_state: progress =  90%
  whisper_full_with_state: progress =  95%
  whisper_full_with_state: progress = 100%
  whisper_full_with_state: progress = 105%
  whisper_full_with_state: progress = 110%
  whisper_full_with_state: progress = 115%
  whisper_full_with_state: progress = 120%
  whisper_full_with_state: progress = 125%
  whisper_full_with_state: progress = 130%
  whisper_full_with_state: progress = 135%
  whisper_full_with_state: progress = 140%
  whisper_full_with_state: progress = 145%
  whisper_full_with_state: progress = 150%
  whisper_full_with_state: progress = 155%
  whisper_full_with_state: progress = 160%
  whisper_full_with_state: progress = 165%
  whisper_full_with_state: progress = 170%
  Progress: 170%
  [0 - 340]:  experience proves this.
  took 3423ms

  I have no idea why the progress reaches 170%. Running it on the jfk.wav from the whisper.cpp repo prints 100%, as expected.

[marmistrz]

Given that the 170% progress issue also occurs on master, could we have this merged without the issue resolved?

[tazz4843]

I was unaware it did so. In that case merging it would be fine, if there's nothing more you want to add here.

[marmistrz]

I'll just update the docs beforehand.

[marmistrz]

This should be ready for merging. Btw. please make sure that you build the full example in CI, looks like the previous commit was actually broken ^^

[tazz4843]

Btw. please make sure that you build the full example in CI, looks like the previous commit was actually broken ^^

Never crossed my mind to add example testing in CI, I'll give that a shot. Thanks for the PR!