[RetroPlayer] Configure renderer sooner

[GTechAlpha]

Description

Reconfigure renderer(s) when required by a zero-copy buffer. Clear pending buffers on buffer request, regardless of state. Don't reconfigure while already configuring. Include render parameters in buffer lock.

Motivation and Context

Minor RetroPlayer rendering improvement.

Types of change

• Bug fix (non-breaking change which fixes an issue)
• Improvement (non-breaking change which improves existing functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Cosmetic change (non-breaking change that doesn't touch code)
• None of the above (please explain below)

Checklist:

• My code follows the Code Guidelines of this project
• My change requires a change to the documentation, either Doxygen or wiki
• I have updated the documentation accordingly
• I have read the Contributing document
• I have added tests to cover my change
• All new and existing tests passed

[garbear]

Confirmed that this fixes the crash in PCSX. Thanks.

[matejmosko]

Hi, for me this didn't solve the crash in psx games. Upgraded to milhouse's build 720 and no change. Psx games still crash kodi.

Rpi3, libreelec.

[GTechAlpha]

You will need a LibreELEC build with the latest pcsx-rearmed that includes libretro/pcsx_rearmed#178 .