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 any echo.<br><br>I read the documentation again and again,found I am indeed following the instruction.<br>
<br><div class="gmail_quote">2010/6/28 <span dir="ltr"><<a href="mailto:fanchuan0077@gmail.com">fanchuan0077@gmail.com</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hello, all.<br><br>1) ACE does not work for me<br> I am in a voip project using Speex, failed to have hte Speex ACE work. here is how I initialize it:<br> /**<br> * Configurations :<br> * #define BITS_PER_SAMPLE (16)<br>
* #define SAMPLE_RATE (8000)<br> * #define CHANNEL_NB (1)<br> * #define DURATION (20)<br> * SPEEX_MODEID_NB<br> */<br> _eco_state = speex_echo_state_init(_encframe_size, 10*_encframe_size);<br>
speex_echo_ctl(_eco_state, SPEEX_ECHO_SET_SAMPLING_RATE, &_sample_rate);<br><br> _den_state = speex_preprocess_state_init(_encframe_size, _sample_rate);<br> speex_preprocess_ctl(_den_state, SPEEX_PREPROCESS_SET_ECHO_STATE, _eco_state);<br>
<br> tmp=1;<br> speex_preprocess_ctl(_den_state, SPEEX_PREPROCESS_SET_DENOISE, &tmp);<br> tmp=1;<br> speex_preprocess_ctl(_den_state, SPEEX_PREPROCESS_SET_AGC, &tmp);<br> ftmp=24000; // actually default is 8000(0,32768),here make it louder for voice is not loudy enough by default. 8000<br>
speex_preprocess_ctl(_den_state, SPEEX_PREPROCESS_SET_AGC_LEVEL, &ftmp);<br> tmp=1;<br> speex_preprocess_ctl(_den_state, SPEEX_PREPROCESS_SET_VAD, &tmp);<br><br>and following is how I cancel echo:<br><br>I have a player class and a recorder class using windows wavein and waveout with waveInProc and waveOutProc event handlers<br>
<br>void __stdcall WFAudioPlayer::WaveOutProc(HWAVEOUT hWaveOut,UINT uMsg,DWORD dwInstance,DWORD dwParam1,DWORD dwParam2)<br>{<br> if(uMsg != WOM_DONE)<br> return;<br><br> WFAudioPlayer* player = reinterpret_cast<WFAudioPlayer*>(dwInstance);<br>
<br> if (player)<br> {<br> // get the frame to be played back next.<br> tByte* nextframe = player->GetNextBlockFrame();<br><br> /**<br> * No matter the following two lines are commented or not, the voip performances are the same, with echo.<br>
*/ <br> // make speex AEC buffer it for echo cancellation for recorder<br> if (nextframe) <br> player->GetConverter()->SpeexEchoPlayback(nextframe);<br>
}<br> ......<br>}<br><br>void WFAudioRecorder::ProcessRecordedFrame(tByte* record)<br>{<br> static tUInt32 timestamp_counter = 0;<br><br> // cancel echo<br> _converter->SpeexEchoCapture(record,_echooutframe);<br>
<br> //preprocess<br> _converter->SpeexPreprocessRun(_echooutframe);<br> ........<br>}<br>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.<br>
<br>Any help would be appreciated, thanks.<br><br>2)<br>BTW speex_echo_state_destroy crashes if the echo state was initialized with filter length 0.<br>_eco_state = speex_echo_state_init(_encframe_size, 0);<br>I know it's unreasonable to make filter length 0, but crash is unacceptable, I think.</blockquote>
</div><br><br clear="all"><br>-- <br>B.r<br>Sincerly Dongwen<br>