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Co-authored-by: vfdev <vfdev.5@gmail.com>

Co-authored-by: Richard Barnes <rbarnes@meta.com>

Co-authored-by: Nicolas Hug <nh.nicolas.hug@gmail.com>

Co-authored-by: Nicolas Hug <nh.nicolas.hug@gmail.com>

Co-authored-by: Philip Meier <github.pmeier@posteo.de>

Co-authored-by: Nicolas Hug <nh.nicolas.hug@gmail.com>

* Fix out-of-bounds read in decode_png

* Fix lint

* Use size_t instead of int to fix sign-compare check

* Add a unit-test to decode currupted png file

* Fix linter

* Update torchvision/csrc/io/image/cpu/decode_png.cpp

* Replace png_error with TORCH_CHECK
Co-authored-by: Vasilis Vryniotis <datumbox@users.noreply.github.com>

* Update error message

* Update error message
Co-authored-by: vfdev <vfdev.5@gmail.com>

* Fix linter
Co-authored-by: Vasilis Vryniotis <datumbox@users.noreply.github.com>
Co-authored-by: vfdev <vfdev.5@gmail.com>

* Conditionally include Python in the C++ builds.

Added an option `USE_PYTHON` that allows users to decide to link to Python3 or not.

* Also conditionally include this defintion.

* Define `USE_PYTHON` for the Windows builds.

* Remove Python3 reference in CMake test as it's no longer required.

* Accidentally removed the closing > from the decl.

* Also add `USE_PYTHON` when building the separate image library on Windows.

* Also conditionally include this depening on USE_PYTHON.

* Go back to require Python for this example.

* Find Python in the hello world example.

* Add a paragraph documenting the `USE_PYTHON` option.
Co-authored-by: Prabhat Roy <prabhatroy@fb.com>

* Fix missing Torch includes

* Import op_registration directly

* add api usage log for io

* cover VideoReader

* cover c++ APIs

* add api usage log for io

* cover VideoReader

* cover c++ APIs

* add _cpp suffix to c++ APIs

* use new API and change cpp format

* remove _cpp suffix

* adopt new API

* lint

This reverts commit 85b78580.

Description:
- Applied `contiguous` on decoded output tensor in decode_jpeg and decode_png ops
- Updated tests and docs

Related to #4880

* WIP

* cleaner code

* Add tests

* Add docs

* Assert dtype

* put back check

* Address comments
Co-authored-by: Francisco Massa <fvsmassa@gmail.com>

* Windows use size_t

* Temporarily pin jpeg <=9b

* Temporarily pin jpeg ==9c

* Remove pinning.

* Fixed a couple of typos and removed unnecessary bracket

* Fixed clang error

* Unpinned the libjpeg version and fixed jpeg_mem_dest's size type Windows BC issue

* Temporarily get back pinned jpeg lib in order to run tests on CircleCI

* Revert "Temporarily get back pinned jpeg lib in order to run tests on CircleCI"

This reverts commit ab18a354150f750256b61911e54aa48621ef24cd.

* Used using instead of typedef and Fixed comment typo
Co-authored-by: Zhongkai Zhu <zhongkai@fb.com>
Co-authored-by: Vasilis Vryniotis <datumbox@users.noreply.github.com>

* interlaced png images
Co-authored-by: Vincent Moens <vmoens@fb.com>

Co-authored-by: Nicolas Hug <nicolashug@fb.com>
Co-authored-by: Vasilis Vryniotis <datumbox@users.noreply.github.com>

* Fixed read_image bug

* Removed unused import

* Skip tests if cv2 unavailable

* Removed cv2 dependency

Co-authored-by: James Thewlis <james@unitary.ai>

Co-authored-by: Vasilis Vryniotis <datumbox@users.noreply.github.com>

* Moving jpegcommon inside cpu implementation

* Adding namespaces on image and moving private methods to anonymous.

* Fixing headers.

* Renaming public image methods to match the ones on python.

* Refactoring to remove the double ifs in common_jpeg.h

Co-authored-by: Vasilis Vryniotis <datumbox@users.noreply.github.com>

* Update ImageReadMode error messages, add newline at the end of image_read_mode.h, replace define with const in image_read_mode.h, add documentation to ImageReadMode enum

* Update readpng_cpu and readjpeg_cpu error messages

* Update image.py documentation

Summary:
* Reduce unnecessary header inclusions in models and io.

* Move autocast to separate folder and hide autograd implementation in an anonymous namespace.

* Moving files in subfolders.

Reviewed By: fmassa

Differential Revision: D25461523

fbshipit-source-id: 756eeb6848aacaa474de4825ed4c1045d17e2cea