Allow implementations to optimize encode parameters for better performance or quality.

Set VK_VIDEO_SESSION_CREATE_ALLOW_ENCODE_PARAMETER_OPTIMIZATIONS_BIT_KHR in the
flags field of VkVideoSessionCreateInfoKHR to allow implemenations to optimize
the encode parameters. These optimizations can be implementation-specific,
meaning the driver might adjust certain settings internally to optimize encoding
parameters (like bitrate, GOP structure, etc.) for better performance or quality.

Signed-off-by: Raju Konda <[email protected]>

Author: krajunv

vk_video_encoder/libs/VkVideoEncoder/VkVideoEncoder.cpp

@@ -917,6 +917,7 @@ VkResult VkVideoEncoder::InitEncoder(VkSharedBaseObj<EncoderConfig>& encoderConf
     VkVideoSessionCreateFlagsKHR sessionCreateFlags{};
     void* sessionCreateInfoChain = nullptr;
 
+    sessionCreateFlags |= VK_VIDEO_SESSION_CREATE_ALLOW_ENCODE_PARAMETER_OPTIMIZATIONS_BIT_KHR;
 #ifdef VK_KHR_video_maintenance1
     m_videoMaintenance1FeaturesSupported = VulkanVideoCapabilities::GetVideoMaintenance1FeatureSupported(m_vkDevCtx);
     if (m_videoMaintenance1FeaturesSupported) {