search for: uninterleav

Hi, I am testing the encoder example and I have a question about it... How can I encode a mono file in 22050 and 44100? I've changed the init values to: ret=vorbis_encode_init_vbr(&vi,1,22050,.5) ; and in the loop: // uninterleave samples for(i=0;i<bytes/2;i++) { buffer[0][i]=((readbuffer[i*2+1]<<8)|(0x00ff&(int)readbuffer[i*2]))/32768.f; } .. what happened is that my file came 2x accelerated (originalsamples/2). Why this happened? thanks <p>--- >8 ---- List archive...

data. On closer inspection (should have done that before, sorry), the procedure uninterleave that you gave is a direct translation of that code, and it also uses little endian (the high byte is at address i*4+1, the low byte at i*4, hence the little byte first, little endian). Procedure uninterleave_little_endian uninterleaves as well, but assumes that the machine it's running on...

data. On closer inspection (should have done that before, sorry), the procedure uninterleave that you gave is a direct translation of that code, and it also uses little endian (the high byte is at address i*4+1, the low byte at i*4, hence the little byte first, little endian). Procedure uninterleave_little_endian uninterleaves as well, but assumes that the machine it's running on...

...shed some light on encoding chunks of PCM data rather than files. My starting point is pretty much that of vorb_enc.dll by Andy Kay and the encoder_example.c from vorbis 1.0 distribution. From what I gather encoder setup goes through fine, but when I get a PCM chunk to encode, I can't get past uninterleaving samples, it seems to die with EXCEPTION_ACCESS_VIOLATION while uninterleaving. Any ideas? I guess what I am really asking is how should I go about doing something like an equivalent of lame_encode_buffer () or lame_encode_buffer_interleaved () in vorbis? Also, a related question. Example encod...

Hi there, I've a little question abound programming an ogg-vorbis encoder. The encode_example.c works ok for files with 44100/2/16 - but not for other formats. I don"t really understand what this piece of code is really doing: /* uninterleave samples */ for(i=0;i<bytes/4;i++){ buffer[0][i]=((readbuffer[i*4+1]<<8)| (0x00ff&(int)readbuffer[i*4]))/32768.f; buffer[1][i]=((readbuffer[i*4+3]<<8)| (0x00ff&(int)readbuffer[i*4+2]))/32768.f; } how shou...

I've been trying to piece my way through the encoder_example.c program to better understand how to encode files as ogg/vorbis. I'm stuck on two sections of the code. This is the first /* uninterleave samples */ for(i=0;i<bytes/4;i++){ buffer[0][i]=((readbuffer[i*4+1]<<8)| (0x00ff&(int)readbuffer[i*4]))/32768.f; buffer[1][i]=((readbuffer[i*4+3]<<8)| (0x00ff&(int)readbuffer[i*4+2]))/32768.f; } This i...

Hi! I have a problem. I hope, you can help me. I use a Delphi conversion (from Aleksandr Shamray), but it doesn't work when I'd like to convert a *.RAW into a mono *.ogg file. vorbis_encode_init_vbr(vi, 1, 44100, 0.5); //because of the mono the program stops at line: //* uninterleave samples */ . . buffer[1][i] := smallInt((pArray(@readbuffer)[i shl 2 + 3] shl 8) or pArray(@readbuffer)[i shl 2 + 2]) / 32768; . . Why????? Please, help me! Thank You! <p>--------------------------------- Do you Yahoo!? Yahoo! Finance: Get your refund fast by filing online --- >8 -...

...ctral envelope. Advantages: more stable local spectral behavior (no more spreading stereo image at lower bitrates), more control over tuning specific error characteristics. Disadvantages: it takes more bits than LSP, but not by an absurd margin (20%-30% premiun). Residue 1: Same as residue 0, but uninterleaved. The advantages are that this is faster and allows one to more easily exploit adjacent-line structure in the MDCT, assuming that that's what the codebook model wants to do. Vorbisfile optimizations; I took HB's optimization patch, fixed a few infinite loop problems in it, and then decid...

Hi, Please brace yourselves for some possibly stupid questions. Why are there only 2 codebooks for floors and many more for residue values? What makes the encoding of floor values fundamentally different from encoding residue values? I have a basic understanding of VQ, and looking at the floor decode function, it all makes sense 1) Read the codebook index from the stream 2) Do a

...ush(os, og); end; eos := false; while not eos do begin bytes := InFile.Read(readbuffer, SAMPLES*4); if bytes = 0 then begin fix; vorbis_analysis_wrote(vd,0); end else begin fix; buffer := vorbis_analysis_buffer(vd, SAMPLES); // uninterleave_little_endian(buffer,@readbuffer[0],bytes div 4); uninterleave(buffer,@readbuffer[0],bytes div 4); vorbis_analysis_wrote(vd, bytes div 4); end; fix; while(vorbis_analysis_blockout(vd,vb)=1) do begin fix; vorbis_analysis(vb,op); fix; vor...

...al_samples_consumed = 0; num_reads=0; while(!feof(fp_infile)){ // num_mseconds = 0; long i; long bytes=fread(readbuffer,1,READ*4,fp_infile); /* stereo hardwired here */ /* expose the buffer to submit data */ float **buffer=vorbis_analysis_buffer(&vd,READ); /* uninterleave samples */ for(i=0;i<bytes/4;i++){ buffer[0][i]=((readbuffer[i*4+1]<<8)| (0x00ff&(int)readbuffer[i*4]))/32768.f; buffer[1][i]=((readbuffer[i*4+3]<<8)| (0x00ff&(int)readbuffer[i*4+2]))/32768.f; } /* tell t...

...long ret; int StartOffset = ov_pcm_tell(&m_pDecoder->VorbisFile); if (StartOffset<0) Error("Decode","Offset error"); // uninterleave samples ret = ov_read(&m_pDecoder->VorbisFile,(char *)_pData,_nBytes,0,2,1,&m_pDecoder->Section); int EndOffset = ov_pcm_tell(&m_pDecoder->VorbisFile); if (EndOffset<0)...

...t;= 0){ /* end of audio stream */ if(e_o_s) - vorbis_analysis_wrote (&info.vd, 0); + vorbis_analysis_wrote (&info->vd, 0); } else{ - vorbis_buffer = vorbis_analysis_buffer (&info.vd, samples); + vorbis_buffer = vorbis_analysis_buffer (&info->vd, samples); /* uninterleave samples */ for (i = 0; i < samples; i++){ - for(j=0;j<info.channels;j++){ + for(j=0;j<info->channels;j++){ vorbis_buffer[j][i] = buffer[count++] / 32768.f; } } - vorbis_analysis_wrote (&info.vd, samples); + vorbis_analysis_wrote (&info->vd, samples); }...