opus - Nov 2019 - about speech/music detector in opus 1.3.1

Hi,

I’m wondering how can I get the speech/music classification result when encoding
the audio in opus 1.3.1?

I found in the file opus_encoder.c, there is a opus_encoder_ctl request as
OPUS_GET_VOICE_RATIO_REQUEST, so I wrote in my program the below code:

#define OPUS_GET_VOICE_RATIO(x) 11019, __opus_check_int_ptr(x)

int32_t voiceRatio;
opus_encoder_ctl(encoder, OPUS_GET_VOICE_RATIO(&voiceRatio));
LOGI("voice ratio:%d", voiceRatio);

But it always return -1.

And then I found that in the opus_encoder.c, the classification can only enable
when #ifndef DISABLE_FLOAT_API, but I’m not sure if & where we define the
DISABLE_FLOAT_API? How can I build the lib without this macro?

I build the lib for IOS, using the script at
https://github.com/chrisballinger/Opus-iOS
<https://github.com/chrisballinger/Opus-iOS>

It takes me several days to test but no success, can you help me?

Thank you very much!
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