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Topic: Ogg get bits per sample (Read 7532 times) previous topic - next topic
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Ogg get bits per sample

Hi folks,
how to get from ogg file bits per sample (8bits or 16bits) ?

Ogg get bits per sample

Reply #1 –
If you mean Vorbis, the decoded data is intrinsically floating point (libvorbis) or 16bits-or-more (Tremor), but the type of data gotten back from both the normal interfaces to these libraries is 16 bit.

Ogg get bits per sample

Reply #2 –
10x man, I hope this is true

Ogg get bits per sample

Reply #3 –
Quote
10x man, I hope this is true
[a href="index.php?act=findpost&pid=366917"][{POST_SNAPBACK}][/a]

It is.  The decoding library returns floats, so it up to the decoder frontend to decide the bit depth to write at - normally this is 16 bit integer by default. This is really what aspifox has already said!!

Ogg get bits per sample

Reply #4 –
Quote
Quote
10x man, I hope this is true
[a href="index.php?act=findpost&pid=366917"][{POST_SNAPBACK}][/a]

It is.  The decoding library returns floats, so it up to the decoder frontend to decide the bit depth to write at - normally this is 16 bit integer by default. This is really what aspifox has already said!!
[a href="index.php?act=findpost&pid=366939"][{POST_SNAPBACK}][/a]


Ok, but when I use ov_read(OggVorbis_File *vf, char *buffer, int length, int bigendianp, int word, int sgned, int *bitstream);

word
Specifies word size. Possible arguments are 1 for 8-bit samples, or 2 or 16-bit samples. Typical value is 2.

How to understand how ogg file (8bits or 16bits) is coded?

Sorry for my english :/
 

Ogg get bits per sample

Reply #5 –
Quote
Ok, but when I use ov_read(OggVorbis_File *vf, char *buffer, int length, int bigendianp, int word, int sgned, int *bitstream);

word
Specifies word size. Possible arguments are 1 for 8-bit samples, or 2 or 16-bit samples. Typical value is 2.

How to understand how ogg file (8bits or 16bits) is coded?

Sorry for my english :/
[a href="index.php?act=findpost&pid=367167"][{POST_SNAPBACK}][/a]

Internally, the encoded data is in floats. If you want full flexibility, you can use ov_read_float and you'll receive the decoded data in float format so you can then do with it as you will.