[FFmpeg-devel] [PATCH] Add hwaccel_data infrastructure

[Gwenole Beauchesne]

Hi,

This patch implements the suggested hwaccel_data infrastructure.

- hwaccel_data is allocated by the player and matches what we currently 
name vdpau_render_state or vaapi_render_state. The aim is to replace the 
use of AVCodecContext::data[0] (reserved for YV12 pixels -- future use).

- hwaccel_data_private is optional (check AVHWAccel::priv_data_size) and 
allocated by FFmpeg. This private data has the lifetime of the decoded 
AVFrame. It's deallocated through the ::close() function. I don't really 
like the name. For VA API, I implemented it as ff_vaapi_destroy_picture().

Regards,
Gwenole.
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