[Speex-dev] ACE does not work for me at all.
fanchuan0077 at gmail.com
Mon Jun 28 01:44:47 PDT 2010
No matter I speex_echo_playback the received voice data(from far end) right
before it's played by waveout or right after it's played, it cann't cancel
I read the documentation again and again,found I am indeed following the
2010/6/28 <fanchuan0077 at gmail.com>
> Hello, all.
> 1) ACE does not work for me
> I am in a voip project using Speex, failed to have hte Speex ACE work. here
> is how I initialize it:
> * Configurations :
> * #define BITS_PER_SAMPLE (16)
> * #define SAMPLE_RATE (8000)
> * #define CHANNEL_NB (1)
> * #define DURATION (20)
> * SPEEX_MODEID_NB
> _eco_state = speex_echo_state_init(_encframe_size, 10*_encframe_size);
> speex_echo_ctl(_eco_state, SPEEX_ECHO_SET_SAMPLING_RATE, &_sample_rate);
> _den_state = speex_preprocess_state_init(_encframe_size, _sample_rate);
> speex_preprocess_ctl(_den_state, SPEEX_PREPROCESS_SET_ECHO_STATE,
> speex_preprocess_ctl(_den_state, SPEEX_PREPROCESS_SET_DENOISE, &tmp);
> speex_preprocess_ctl(_den_state, SPEEX_PREPROCESS_SET_AGC, &tmp);
> ftmp=24000; // actually default is 8000(0,32768),here make it louder for
> voice is not loudy enough by default. 8000
> speex_preprocess_ctl(_den_state, SPEEX_PREPROCESS_SET_AGC_LEVEL, &ftmp);
> speex_preprocess_ctl(_den_state, SPEEX_PREPROCESS_SET_VAD, &tmp);
> and following is how I cancel echo:
> I have a player class and a recorder class using windows wavein and waveout
> with waveInProc and waveOutProc event handlers
> void __stdcall WFAudioPlayer::WaveOutProc(HWAVEOUT hWaveOut,UINT uMsg,DWORD
> dwInstance,DWORD dwParam1,DWORD dwParam2)
> if(uMsg != WOM_DONE)
> WFAudioPlayer* player = reinterpret_cast<WFAudioPlayer*>(dwInstance);
> if (player)
> // get the frame to be played back next.
> tByte* nextframe = player->GetNextBlockFrame();
> * No matter the following two lines are commented or not, the voip
> performances are the same, with echo.
> // make speex AEC buffer it for echo cancellation for recorder
> if (nextframe)
> void WFAudioRecorder::ProcessRecordedFrame(tByte* record)
> static tUInt32 timestamp_counter = 0;
> // cancel echo
> and ACE seems not work for me at all. I don't know why. the voices are the
> same whether I cancel echo or not,full of echos.
> Any help would be appreciated, thanks.
> BTW speex_echo_state_destroy crashes if the echo state was initialized with
> filter length 0.
> _eco_state = speex_echo_state_init(_encframe_size, 0);
> I know it's unreasonable to make filter length 0, but crash is
> unacceptable, I think.
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