Displaying 11 results from an estimated 11 matches for "readbuff".
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readbuf
2011 Mar 10
4
Wav to Ogg Vorbis conversion
...I found here:
http://svn.xiph.org/trunk/vorbis/examples/encoder_example.c
Could you please tell me what float** buffer is needed for (I don't see
it used anywhere).
Also, could you please tell me what this code is doing:
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;
}
Again, buffer is not used afterwards.
And where does the actual encoding happen...
2005 Sep 26
2
encoder_example.c Questions
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 is the second.
/* vorbis does some data preanalysis, then divvies up bloc...
2002 Dec 16
1
encoding question
...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 should this part look for files with other specifications then
44100/2/16?
I'...
2004 Apr 19
3
encoding from 22050Hz source
...encode from a 22050 Hz source wav file (only in that case),
but i get the following error message: "Invalid floating point operation"
I use delphi:
vorbis_encode_init_vbr(vi,2,22050,0.5)
.
.
.
While (i < readCount div 4) Do
Begin
buffer[0][i] := smallInt((pArray(@readbuffer)[i shl 2 + 1] shl 8) or pArray(@readbuffer)[i shl 2 + 0]) / 32768;
buffer[1][i] := smallInt((pArray(@readbuffer)[i shl 2 + 3] shl 8) or pArray(@readbuffer)[i shl 2 + 2]) / 32768;
inc(i);
End
What could be wrong???
Thank you!
crc
---------------------------...
2004 May 18
2
encode example
...ting 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
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2003 Nov 08
2
Encoding in Delphi - Help
...--
result := ogg_stream_flush(os, og);
while result <> 0 do
begin
OutFile.Write(Pointer(og.header)^, og.header_len);
OutFile.Write(Pointer(og.body)^, og.body_len);
result := ogg_stream_flush(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,@readbu...
2007 May 01
1
contstant bittrate mode - block size - packet size
...num_packets = 0;
//num_mseconds = 0;
rma.management_active = 1;
rma.bitrate_limit_max_kbps = 3*128000;
rma.bitrate_limit_min_kbps = 3*128000;
rma.bitrate_limit_reservoir_bits = 0;
rma.bitrate_limit_reservoir_bias = 0;
rma.bitrate_average_kbps = 3*128000;
/* skip over header */
readbuffer[0] = '\0';
for (i=0, founddata=0; i<30 && ! feof(fp_infile) && ! ferror(fp_infile);
i++)
{
fread(readbuffer,1,2,fp_infile);
if ( ! strncmp((char*)readbuffer, "da", 2) )
{
founddata = 1;
fread(readbuffer,1,6,fp_infile)...
2004 Feb 13
10
Encoding into MONO (delphi)
...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!
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Ogg proje...
2006 Sep 11
4
encode, decode and encode again
(I've already posted this message month ago, but nobody answered, may be
it was not delivered to newsgroup?)
Hello, All.
I wrote an encoder-decoder based on example from OGG-Vorbis SDK.
This encoder can encode a large amount of small WAV-files with equal
parameters into one sound archive.
Then I decode this sound archive back into large amount of small
WAV-files.
Theese files are
2002 Feb 20
4
Questions about libvorbisenc
Hi all,
I am just coming in the mailing list.... ;-)
I'm working on an Ripper/Encoder for GNUstep.
At first sight, libvorbisogg seems to be the library that I needed.
The problem for me is documentation.
So I have a few question about this library :
- in order to init an encoding process, we need to provide channels. Well,
what does is mean ?
- in order to init an encoding process, we need
2004 Nov 16
0
metadata switches for ffmpeg2theora
...theoraframes_add_video (uint8_t * data, int width, int height,
+extern void theoraframes_init (theoraframes_info *info);
+extern int theoraframes_add_video (theoraframes_info *info, uint8_t * data, int width, int height,
int linesize,int e_o_s);
-extern int theoraframes_add_audio (int16_t * readbuffer, int bytesread,
+extern int theoraframes_add_audio (theoraframes_info *info, int16_t * readbuffer, int bytesread,
int samplesread,int e_o_s);
-extern void theoraframes_flush (int e_o_s);
-extern void theoraframes_close ();
+extern void theoraframes_flush (theoraframes_info *info, int e_o_...