RFC: V4L2 MPEG Encoding API: Part 2

[Mauro Carvalho Chehab <mchehab (at) infradead.org>]

Em Seg, 2006-05-01 às 00:40 +0200, Hans Verkuil escreveu:
> This is part 2 of the proposal for adding an MPEG API to V4L2. This part 
> describes the extended controls.

> Audio controls
> ==============
> 
> This is the full list of the audio properties that can be set according  
> to the ISO/IEC 11172-3 MPEG audio standard. Also the options listed  
> with each control come straight from this standard.
> 
> V4L2_CID_COMP_AUDIO_SAMPLING_FREQ_ENUM
> Set audio recording frequency.
> MENU: possible values: 0 = 44.1, 1 = 48, 2 = 32 kHz

> V4L2_CID_COMP_AUDIO_SAMPLING_FREQ
> Set audio recording frequency.
> INT: sampling frequency in Hz.
Hmm... having an enum and a Hz control for the same stuff? wouldn't be
better to have only one?

> V4L2_CID_COMP_AUDIO_L1_BITRATE:
> Set audio bitrate for layer 1.
> Set to INACTIVE if layer != 1.

> V4L2_CID_COMP_AUDIO_L2_BITRATE:
> Set audio bitrate for layer 2.
> Set to INACTIVE if layer != 2.

> V4L2_CID_COMP_AUDIO_L3_BITRATE:
> Set audio bitrate for layer 3.
> Set to INACTIVE if layer != 3.
> MENU: possible values:

> V4L2_CID_COMP_AUDIO_BITRATE:
> INT: Set audio bitrate to the nearest valid value for the current layer.

Same comment.


Cheers, 
Mauro.

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