[FFmpeg-devel] [RFC] The Big Bump checklist

[Jean-Daniel Dupas]

Le 7 mars 2011 ? 20:12, Stefan Gehrer a ?crit :

> On 03/07/2011 06:41 PM, M?ns Rullg?rd wrote:
>> "Ronald S. Bultje"<rsbultje at gmail.com>  writes:
>> 
>>> Hi,
>>> 
>>> On Wed, Feb 23, 2011 at 2:45 AM, Anton Khirnov<anton at khirnov.net>  wrote:
>>>> Two more things: AVPalette control and AVCodecContext.request_channells
>>>> have been deprecated since stone age, yet are still used in some places.
>>>> Any volunteers for fixing those?
>>> 
>>> I don't think we have any decided-upon replacement for AVPalette, do we?
>> 
>> I thought there was one since at least 3 or 4 years.
>> 
> 
> As far as I understand the replacement for AVPalette control is to send
> the palette along with the image data in data[1] as described in
> pixfmt.h:
> 
> * When the pixel format is palettized RGB (PIX_FMT_PAL8), the palettized
> * image data is stored in AVFrame.data[0]. The palette is transported in
> * AVFrame.data[1], is 1024 bytes long (256 4-byte entries) and is
> * formatted the same as in PIX_FMT_RGB32 described above (i.e., it is
> * also endian-specific). Note also that the individual RGB palette
> * components stored in AVFrame.data[1] should be in the range 0..255.
> * This is important as many custom PAL8 video codecs that were designed
> * to run on the IBM VGA graphics adapter use 6-bit palette components.
> *
> * For all the 8bit per pixel formats, an RGB32 palette is in data[1] like
> * for pal8. This palette is filled in automatically by the function
> * allocating the picture.
> 

One problem not described here, is to detect when the palette change.

-- Jean-Daniel