Add YUV to RGB color conversion with cubic and linear vertical chroma upsampling.

[jeffqjiangNew]

Motivation

This PR adds YUV to RGB color conversion with cubic and linear vertical chroma upsampling.

Technical Details

Two new 8-bit NV12 to RGB packed color space conversion (CSC) functions are added:

• One CSC function with FFmpeg-compatible cubic vertical chroma upsampling
• One CSC function with FFmpeg-compatible linear vertical chroma upsampling

Test Plan

Run the proposed TorchCodec test with AMD ROCm HW decoder enabled.

H.265 10-bit test should pass.

Test Result

Submission Checklist

• Look over the contributing guidelines at https://github.com/ROCm/ROCm/blob/develop/CONTRIBUTING.md#pull-requests.

[Copilot]

Pull request overview

Adds new NV12 (8-bit) YUV→RGB packed conversion entry points that perform FFmpeg-compatible vertical chroma upsampling (bicubic and bilinear) on the HIP backend, extending the existing rppt_yuv_to_rgb path.

Changes:

• Added public RPPT APIs: rppt_yuv_to_rgb_bicubic_v and rppt_yuv_to_rgb_bilinear_v (HIP-only, U8 NV12 → RGB24).
• Implemented HIP kernels for bicubic/bilinear vertical chroma upsampling and corresponding HIP executors.
• Wired new APIs through the tensor data-exchange operations dispatcher and added executor declarations.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 5 comments.

File	Description
src/modules/tensor/rppt_tensor_data_exchange_operations.cpp	Adds new RPPT entry points that route to HIP executors for bicubic/bilinear vertical chroma upsampling.
src/modules/tensor/hip/kernel/color_space_conversion.cpp	Implements the two new HIP kernels and executor launch functions.
src/include/tensor/hip_tensor_executors.hpp	Declares the new HIP executor templates.
api/rppt_tensor_data_exchange_operations.h	Exposes and documents the new public APIs.

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[rrawther]

Please add review comments

[rrawther]

Added a minor comment for further improvement

[LakshmiKumar23]

@jeffqjiangNew we need to add some local test cases later for this. Let's discuss

[LakshmiKumar23]

Running CI: https://math-ci.amd.com/blue/organizations/jenkins/mainline%2Fprecheckin%2Frpp/detail/PR-715/4/pipeline

[codecov]

Codecov Report

❌ Patch coverage is 89.24731% with 10 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...es/tensor/rppt_tensor_data_exchange_operations.cpp	81.82%	10 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #715      +/-   ##
===========================================
- Coverage    93.11%   93.08%   -0.02%     
===========================================
  Files          201      201              
  Lines        97531    97623      +92     
===========================================
+ Hits         90809    90872      +63     
- Misses        6722     6751      +29     

Files with missing lines	Coverage Δ
...dules/tensor/hip/kernel/color_space_conversion.cpp	82.08% <100.00%> (+10.02%)	⬆️
...es/tensor/rppt_tensor_data_exchange_operations.cpp	92.14% <81.82%> (-1.83%)	⬇️

... and 3 files with indirect coverage changes

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[rrawther]

Can we add a test case for the new functionality. Codecov showing >1% diff

[jeffqjiangNew]

Agreed we need to add new test for the new functions. Working on that.