[FFmpeg-devel] [PATCH] Add convenience macros for 5.0/5.1 back speaker configurations

Justin Ruggles justin.ruggles
Mon Apr 6 03:07:26 CEST 2009

Michael Niedermayer wrote:
> On Sun, Apr 05, 2009 at 07:39:16PM -0400, Justin Ruggles wrote:
>> Hi,
>> The default 5.1-channel configuration on Windows is 0x3F (back
>> speakers), not 0x60F (side speakers). Microsoft decided to not use 0x60F
>> even after the addition of 7.1-channel layouts and instead said that
>> 0x3F should send audio to the side speakers, not back speakers.  This is
>> explained in more detail in their document, "Audio Driver Support for
>> Home Theater Speaker Configurations"[1]
>> These macros can useful for encoders that want to support either layout
>> since it is ambiguous as to the true intent.
> patch looks ok


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