On Fri, Apr 14, 2006 at 07:46:38PM +1000, Erik de Castro Lopo wrote: > Alfons Adriaensen wrote: > > > I've gone through the docs a number of times, but can't find > > a way to read / write the channelmask and guid in a WAVEFORMAT > > extensible file. > > I thought the guid was determined by the data encoding ie once > you decide to write PCM data, you have to use a specific guid.
You obviously need access to the channelmask when reading or creating multichannel files. As to the GUID, there are e.g. special GUIDs for Ambisonics files, see <http://dream.cs.bath.ac.uk/researchdev/wave-ex/bformat.html>. BTW I don't understand the relation between the definition of the GUIDs on that page SUBTYPE_AMBISONIC_B_FORMAT_PCM {00000001-0721-11d3-8644-C8C1CA000000} SUBTYPE_AMBISONIC_B_FORMAT_IEEE_FLOAT {00000003-0721-11d3-8644-C8C1CA000000} and the example representation of the first one further down: {0x00000001,0x0000,0x0010, {0x80,0x00, 0x00,0xaa,0x00,0x38, 0x9b, 0x71}} Does it make sense to you ? -- FA Follie! Follie! Delirio vano e' questo!
