ObjC: Split out I420 texture uploading into separate class
This CL splits out the code in RTCI420Shader.mm for uploading byte
buffers to textures into its own class RTCI420TextureCache. The purpose
is to prepare for allowing clients to inject their own shaders.
RTCI420TextureCache will be used in the generic code, while the actual
shaders in RTCI420Shader will be customizable by the client.
BUG=webrtc:7473
Review-Url: https://codereview.webrtc.org/2842453002
Cr-Original-Commit-Position: refs/heads/master@{#17882}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 8245a8542944b1b1c41dba6f61aa2d72cfe79536
5 files changed
