search for: nblockalign

Hi there. I am having a little trouble understanding the frame sizes chosen by the codec. testenc_uwb.c from the speex-1.0 source distribution has a framesize of 640 hardcoded and makes use of this value exclusively. However, a mode query on the actual codec returns 320 as a framesize for this mode. int tmp; speex_mode_query(&speex_uwb_mode, SPEEX_MODE_FRAME_SIZE, &tmp);

...er with ov_read. Buffer setting are: p_oggB->wfx.wFormatTag = WAVE_FORMAT_PCM; p_oggB->wfx.nChannels = oggstruct.vi->channels; p_oggB->wfx.nSamplesPerSec = (unsigned long) oggstruct.vi->rate; p_oggB->wfx.wBitsPerSample = 16; p_oggB->wfx.nBlockAlign = (oggstruct.vi->channels * p_oggB->wfx.wBitsPerSample) / 8; p_oggB->wfx.nAvgBytesPerSec = (unsigned long) (p_oggB->wfx.nSamplesPerSec * p_oggB->wfx.nBlockAlign); p_oggB->wfx.cbSize = 0; Could someone send me source code, how he is playing ogg file, or give me som...

...mply concatenate all the frames > together. For example, it makes it impossible to recover from corrupted > streams and seeking becomes complicated. I would suggest doing something > similar to what Ogg does. For CBR this works perfectly. The block size in the WAVE file is defined by the nBlockAlign value in the WAVEFORMATEX header. These blocks are of a constant size and facilitate seeking. By grouping a number of frames together the padding loss becomes minimal (or zero). Example: CBR Quality 4 Stereo yields 309 bits per frame. I group eight frames into a block and get 8*309 bits = 309 byte...

...m-audio data. Only format information common to all waveform-audio data formats is included in this structure. This structure has been superseded by the WAVEFORMATEX structure. typedef struct { WORD wFormatTag; WORD nChannels; DWORD nSamplesPerSec; DWORD nAvgBytesPerSec; WORD nBlockAlign; } WAVEFORMAT; Members wFormatTag Format type. The following type is defined: WAVE_FORMAT_PCM Waveform-audio data is PCM. nChannels Number of channels in the waveform-audio data. Mono data uses one channel and stereo data uses two channels. nSamplesPerSec Sample rate, in sample...

Hi there. I made a couple of noted regarding the speex API. These are not meant be seen as critisism - rather constructive suggestions. I like speex a lot, but I would like it even more if some of the following features were available. ;) Christian <p>Comments about the Speex API - from a developer's perspective ------------------------------------------------------------- ***

...ite. I am recording sound in the following format:- m_WaveFormatEx.wFormatTag = WAVE_FORMAT_PCM; m_WaveFormatEx.nChannels = 1; m_WaveFormatEx.wBitsPerSample = 8; m_WaveFormatEx.cbSize = 0; m_WaveFormatEx.nSamplesPerSec = 8000; m_WaveFormatEx.nBlockAlign = 1; m_WaveFormatEx.nAvgBytesPerSec = 8000; The recording is as follows :- When the buffer(size = 2000 bytes) gets filled with sound data a function with the body shown below is called. LPWAVEHDR lpHdr = (LPWAVEHDR) lParam; if(lpHdr->dwBytesRecorded==0 || lpHdr==NULL)...

...ngth = audio_encode(buffer,Hdr,Hdr->dwBytesRecorded,8); //... //Decode again: save_length = audio_decode(Hdr,buffer,save_length); Here are the waveform options: waveform.nChannels = 1; waveform.wFormatTag = WAVE_FORMAT_PCM; waveform.wBitsPerSample = 16; waveform.nSamplesPerSec = 8000; waveform.nBlockAlign = (waveform.nChannels*waveform.wBitsPerSample)/8; waveform.nAvgBytesPerSec = waveform.nSamplesPerSec*waveform.nBlockAlign; waveform.cbSize = 0; What am I doing wrong? Are there any examples for encoding a waveform pcm stream in realtime (I didn't found any)? Thanks for your help, Peter --...

...sg, DWORD dwInstance, DWORD dwParam1, DWORD dwParam2 ) +wave_callback ( HWAVEOUT hWave, UINT uMsg, DWORD_PTR dwInstance, DWORD_PTR dwParam1, DWORD_PTR dwParam2 ) { if ( uMsg == WOM_DONE ) { EnterCriticalSection ( &cs ); @@ -125,7 +125,7 @@ Set_WIN_Params ( FILE_T dummyFile , outFormat.nBlockAlign = (outFormat.wBitsPerSample + 7) / 8 * outFormat.nChannels; outFormat.nAvgBytesPerSec = outFormat.nSamplesPerSec * outFormat.nBlockAlign; - switch ( waveOutOpen ( &dev, deviceID, &outFormat, (DWORD)wave_callback, 0, CALLBACK_FUNCTION ) ) + switch ( waveOutOpen ( &dev, deviceID,...

...ave header and play. Doing it i hear only noise in my headphones. So how can i use Opus in this way? Thanks in advance WAVEFORMATEX waveform; waveform.cbSize = 0; waveform.wFormatTag = WAVE_FORMAT_PCM; waveform.nChannels = 2; waveform.wBitsPerSample = 8; waveform.nSamplesPerSec = 48000; waveform.nBlockAlign = waveform.nChannels * (waveform.wBitsPerSample >> 3); waveform.nAvgBytesPerSec = waveform.nSamplesPerSec * waveform.nBlockAlign; #define BUFSIZE 512 ... case MM_WIM_DATA: { WAVEHDR *Hdr = (WAVEHDR *) msg.lParam; int opusRes;...

...called everytime 160 bytes of data is recorded. Here's what I did in the initialisation (called only once). m_waveFormatEx.wFormatTag =WAVE_FORMAT_PCM; m_waveFormatEx.nChannels =1; m_waveFormatEx.wBitsPerSample =8; m_waveFormatEx.cbSize =0; m_waveFormatEx.nSamplesPerSec = 8000; m_waveFormatEx.nBlockAlign =1; m_waveFormatEx.nAvgBytesPerSec = 8000; int quality =8; speex_bits_init(&bits); enc_state = speex_encoder_init(&speex_nb_mode); speex_encoder_ctl(enc_state, SPEEX_SET_QUALITY, &quality); In my recording callback function LRESULT RecordSound::OnSoundData(WPARAM wParam, LPARAM lPara...

...me 160 bytes of data is recorded. Here's what I did in the initialisation (called only once). m_waveFormatEx.wFormatTag =WAVE_FORMAT_PCM; m_waveFormatEx.nChannels =1; m_waveFormatEx.wBitsPerSample =8; m_waveFormatEx.cbSize =0; m_waveFormatEx.nSamplesPerSec = 8000; m_waveFormatEx.nBlockAlign =1; m_waveFormatEx.nAvgBytesPerSec = 8000; int quality =8; speex_bits_init(&bits); enc_state = speex_encoder_init(&speex_nb_mode); speex_encoder_ctl(enc_state, SPEEX_SET_QUALITY, &quality); In my recording callback function LRESULT RecordSound::OnSoundData(WPARAM wPara...

...contrast pack 8 frames into a packet which is inacceptable for realtime conversation. Q5 and upwards use 2 frames. All this is defined in codec.c in the QualityInfo[] table. The columns given below are - Bits per Speex frame - framesize (160 samples in NB mode) - Speex Frames per Packet (see Wave nBlockAlign) - effective bitrate in kbit/s here's an excerpt for the 8kHz Mono modes 43, 160, 8, 2150, // 8000 1 0 !! extremely bad for NM 79, 160, 8, 3950, // 8000 1 1 !! (high latency) 119, 160, 8, 5950, // 8000 1 2 160, 160, 1, 8000, // 8000 1 3 !! Good...

...gone through the manual but not much info on this area. The following is my setting from sound card using mm_system sdk. WAVEFORMATEX *wfx = (WAVEFORMATEX *)input; wfx->nSamplesPerSec = 8000; wfx->nChannels = 1; wfx->wFormatTag = WAVE_FORMAT_PCM; wfx->wBitsPerSample = 16; wfx->nBlockAlign = 2; wfx->nAvgBytesPerSec = 16000; Thanks in advance, YueWeng __________________________________ Do you Yahoo!? Take Yahoo! Mail with you! Get it on your mobile phone. http://mobile.yahoo.com/maildemo

...t this doesn't look right: > m_WaveFormatEx.wFormatTag = WAVE_FORMAT_PCM; > m_WaveFormatEx.nChannels = 1; > m_WaveFormatEx.wBitsPerSample = 8; > m_WaveFormatEx.cbSize = 0; > m_WaveFormatEx.nSamplesPerSec = 8000; > m_WaveFormatEx.nBlockAlign = 1; > m_WaveFormatEx.nAvgBytesPerSec = 8000; > > > You want 16 bits per sample, and 16000 bytes per second... -SteveK

...called everytime 160 bytes of data is recorded. Here's what I did in the initialisation (called only once). m_waveFormatEx.wFormatTag =WAVE_FORMAT_PCM; m_waveFormatEx.nChannels =1; m_waveFormatEx.wBitsPerSample =8; m_waveFormatEx.cbSize =0; m_waveFormatEx.nSamplesPerSec = 8000; m_waveFormatEx.nBlockAlign =1; m_waveFormatEx.nAvgBytesPerSec = 8000; int quality =8; speex_bits_init(&bits); enc_state = speex_encoder_init(&speex_nb_mode); speex_encoder_ctl(enc_state, SPEEX_SET_QUALITY, &quality); In my recording callback function LRESULT RecordSound::OnSoundData(WPARAM wParam, LPARAM lPara...

Hi, I managed to get the codec into netmeeting. Unfortunately it doesn't properly work. I tried to talk vie net, but only erranous packets are decoded. Did I possibly register the codec wiht incorrecxt parameters or is this a problem of the acm codec? bye, D A --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from

...sg->m_pBuffer != NULL) { delete pMsg->m_pBuffer; pMsg->m_pBuffer = NULL; } pMsg->m_pBuffer = new UCHAR[encoded_bytes]; CopyMemory(pMsg->m_pBuffer,result,encoded_bytes); pMsg->m_nBufferSize = encoded_bytes; pMsg->m_nSampleSize = pMsg->m_nBufferSize / 2;//wfx2.nBlockAlign; delete[] result; delete[] output_frame ; delete[] input_frame; result = NULL; input_frame = NULL; output_frame = NULL; return TRUE; }

...put); /*Copy from float to short (16 bits) for output*/ for (i = 0; i < BUFFERSIZE; i++) out[i] = output[i]; strcpy(pDecomData, out); } main.cpp while (!_kbhit() ) { if ( g_oCapture.CaptureSamples(g_ArrBuffer, (BUFFERSIZE / g_sWaveHeader.wfex.nBlockAlign) ) ) { int iFrameSize = 0; char cComFrame[200]; ALchar ArrTemp[BUFFERSIZE]; g_oCapture.Compress(g_ArrBuffer, &iFrameSize, cComFrame ); g_oCapture.Decompress(ArrTemp, iFrameSize, cComFrame); g_...

...0 bytes of data is recorded. Here's what I did in the initialisation (called only once). m_waveFormatEx.wFormatTag =WAVE_FORMAT_PCM; m_waveFormatEx.nChannels =1; m_waveFormatEx.wBitsPerSample =8; m_waveFormatEx.cbSize =0; m_waveFormatEx.nSamplesPerSec = 8000; m_waveFormatEx.nBlockAlign =1; m_waveFormatEx.nAvgBytesPerSec = 8000; int quality =8; speex_bits_init(&bits); enc_state = speex_encoder_init(&speex_nb_mode); speex_encoder_ctl(enc_state, SPEEX_SET_QUALITY, &quality); In my recording callback function LRESULT RecordSound::OnSoundData(WP...

...0 bytes of data is recorded. Here's what I did in the initialisation (called only once). m_waveFormatEx.wFormatTag =WAVE_FORMAT_PCM; m_waveFormatEx.nChannels =1; m_waveFormatEx.wBitsPerSample =8; m_waveFormatEx.cbSize =0; m_waveFormatEx.nSamplesPerSec = 8000; m_waveFormatEx.nBlockAlign =1; m_waveFormatEx.nAvgBytesPerSec = 8000; int quality =8; speex_bits_init(&bits); enc_state = speex_encoder_init(&speex_nb_mode); speex_encoder_ctl(enc_state, SPEEX_SET_QUALITY, &quality); In my recording callback function LRESULT RecordSound::OnSoundData(WP...