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uploads: add support for uploading .avif files.

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Features of AVIF include:

* Lossless and lossy compression.
* High dynamic range (HDR) images
* Wide color gamut images (i.e. 10- and 12-bit color depths)
* Transparency (through alpha planes).
* Animations (with an optional cover image).
* Auxiliary image sequences, where the file contains a single primary
  image and a short secondary video, like Apple's Live Photos.
* Metadata rotation, mirroring, and cropping.

The AVIF format is still relatively new and some of these features aren't well
supported by browsers or other software:

* Animated AVIFs aren't supported by Firefox or by libvips.
* HDR images aren't supported by Firefox.
* Rotated, mirrored, and cropped AVIFs aren't supported by Firefox or Chrome.
* Image grids, where the file contains multiple images that are tiled
  together into one big image, aren't supported by Firefox.
* AVIF as a whole has only been supported for a year or two by Chrome
  and Firefox, and less than a year by Safari.

For these reasons, only basic AVIFs that don't use animation, rotation,
cropping, or image grids can be uploaded.
This commit is contained in:
evazion
2022-10-24 19:10:57 -05:00
parent 420ff2f2f5
commit c96d60a840
26 changed files with 197 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

77
test/unit/media_file_test.rb
View File

@@ -21,6 +21,10 @@ class MediaFileTest < ActiveSupport::TestCase
assert_equal([32, 32], MediaFile.open("test/files/test-static-32x32.gif").dimensions)
end
should "determine the correct dimensions for an AVIF file" do
assert_equal([2048, 858], MediaFile.open("test/files/avif/hdr_cosmos01000_cicp9-16-9_yuv420_limited_qp40.avif").dimensions)
end
should "determine the correct dimensions for a webm file" do
skip unless MediaFile.videos_enabled?
assert_equal([512, 512], MediaFile.open("test/files/test-512x512.webm").dimensions)
@@ -85,6 +89,12 @@ class MediaFileTest < ActiveSupport::TestCase
assert_equal(:gif, MediaFile.open("test/files/test-static-32x32.gif").file_ext)
end
should "determine the correct extension for an AVIF file" do
Dir["test/files/avif/*.avif"].each do |file|
assert_equal(:avif, MediaFile.open(file).file_ext)
end
end
should "determine the correct extension for a webm file" do
assert_equal(:webm, MediaFile.open("test/files/test-512x512.webm").file_ext)
end
@@ -127,6 +137,7 @@ class MediaFileTest < ActiveSupport::TestCase
assert_equal([150, 101], MediaFile.open("test/files/test.jpg").preview(150, 150).dimensions)
assert_equal([113, 150], MediaFile.open("test/files/test.png").preview(150, 150).dimensions)
assert_equal([150, 150], MediaFile.open("test/files/test.gif").preview(150, 150).dimensions)
assert_equal([150, 63], MediaFile.open("test/files/avif/hdr_cosmos01000_cicp9-16-9_yuv420_limited_qp40.avif").preview(150, 150).dimensions)
end
should "generate a preview image for an animated image" do
@@ -294,6 +305,72 @@ class MediaFileTest < ActiveSupport::TestCase
end
end
context "an AVIF file" do
should "be able to read AVIF files" do
Dir["test/files/avif/*.avif"].each do |file|
assert_nothing_raised { MediaFile.open(file).attributes }
end
end
should "detect supported files" do
assert_equal(true, MediaFile.open("test/files/avif/paris_icc_exif_xmp.avif").is_supported?)
assert_equal(true, MediaFile.open("test/files/avif/hdr_cosmos01000_cicp9-16-9_yuv420_limited_qp40.avif").is_supported?)
assert_equal(true, MediaFile.open("test/files/avif/hdr_cosmos01000_cicp9-16-9_yuv444_full_qp40.avif").is_supported?)
assert_equal(true, MediaFile.open("test/files/avif/fox.profile0.8bpc.yuv420.monochrome.avif").is_supported?)
assert_equal(true, MediaFile.open("test/files/avif/tiger_3layer_1res.avif").is_supported?)
end
should "detect unsupported files" do
assert_equal(false, MediaFile.open("test/files/avif/Image grid example.avif").is_supported?)
assert_equal(false, MediaFile.open("test/files/avif/kimono.crop.avif").is_supported?)
assert_equal(false, MediaFile.open("test/files/avif/kimono.rotate90.avif").is_supported?)
assert_equal(false, MediaFile.open("test/files/avif/sequence-with-pitm-avif-major.avif").is_supported?)
assert_equal(false, MediaFile.open("test/files/avif/sequence-with-pitm.avif").is_supported?)
assert_equal(false, MediaFile.open("test/files/avif/sequence-without-pitm.avif").is_supported?)
assert_equal(false, MediaFile.open("test/files/avif/star-8bpc.avif").is_supported?)
# XXX These should be unsupported, but aren't.
# assert_equal(false, MediaFile.open("test/files/avif/alpha_video.avif").is_supported?)
# assert_equal(false, MediaFile.open("test/files/avif/plum-blossom-small-profile0.8bpc.yuv420.alpha-full.avif").is_supported?)
# assert_equal(false, MediaFile.open("test/files/avif/kimono.mirror-horizontal.avif").is_supported?)
end
should "detect animated files" do
assert_equal(true, MediaFile.open("test/files/avif/sequence-with-pitm.avif").is_animated?)
assert_equal(true, MediaFile.open("test/files/avif/sequence-without-pitm.avif").is_animated?)
assert_equal(true, MediaFile.open("test/files/avif/alpha_video.avif").is_animated?)
assert_equal(true, MediaFile.open("test/files/avif/star-8bpc.avif").is_animated?)
assert_equal(48, MediaFile.open("test/files/avif/sequence-with-pitm.avif").frame_count)
assert_equal(95, MediaFile.open("test/files/avif/sequence-without-pitm.avif").frame_count)
assert_equal(48, MediaFile.open("test/files/avif/alpha_video.avif").frame_count)
assert_equal(5, MediaFile.open("test/files/avif/star-8bpc.avif").frame_count)
end
should "detect static images with an auxiliary image sequence" do
assert_equal(true, MediaFile.open("test/files/avif/sequence-with-pitm-avif-major.avif").metadata.is_animated_avif?)
assert_equal(false, MediaFile.open("test/files/avif/sequence-with-pitm-avif-major.avif").is_animated?)
assert_equal(1, MediaFile.open("test/files/avif/sequence-with-pitm-avif-major.avif").frame_count)
end
should "detect rotated images" do
assert_equal(true, MediaFile.open("test/files/avif/kimono.rotate90.avif").metadata.is_rotated?)
end
should "detect monochrome images" do
assert_equal(true, MediaFile.open("test/files/avif/fox.profile0.8bpc.yuv420.monochrome.avif").metadata.is_greyscale?)
end
should "be able to generate a preview" do
assert_equal([180, 75], MediaFile.open("test/files/avif/hdr_cosmos01000_cicp9-16-9_yuv420_limited_qp40.avif").preview(180, 180).dimensions)
assert_equal([180, 75], MediaFile.open("test/files/avif/hdr_cosmos01000_cicp9-16-9_yuv444_full_qp40.avif").preview(180, 180).dimensions)
assert_equal([180, 135], MediaFile.open("test/files/avif/paris_icc_exif_xmp.avif").preview(180, 180).dimensions)
assert_equal([180, 180], MediaFile.open("test/files/avif/Image grid example.avif").preview(180, 180).dimensions)
assert_equal([180, 120], MediaFile.open("test/files/avif/fox.profile0.8bpc.yuv420.monochrome.avif").preview(180, 180).dimensions)
assert_equal([180, 123], MediaFile.open("test/files/avif/tiger_3layer_1res.avif").preview(180, 180).dimensions)
end
end
context "a corrupt GIF" do
should "still read the metadata" do
@file = MediaFile.open("test/files/test-corrupt.gif")

9
test/unit/post_test.rb
View File

@@ -1217,12 +1217,19 @@ class PostTest < ActiveSupport::TestCase
end
context "a greyscale image missing the greyscale tag" do
should "automatically add the greyscale tag" do
should "automatically add the greyscale tag for a monochrome JPEG file" do
@media_asset = MediaAsset.upload!("test/files/test-grey-no-profile.jpg")
@post.update!(md5: @media_asset.md5)
@post.reload.update!(tag_string: "tagme")
assert_equal("greyscale tagme", @post.tag_string)
end
should "automatically add the greyscale tag for a monochrome AVIF file" do
@media_asset = MediaAsset.upload!("test/files/avif/fox.profile0.8bpc.yuv420.monochrome.avif")
@post.update!(md5: @media_asset.md5)
@post.reload.update!(tag_string: "tagme")
assert_equal("greyscale tagme", @post.tag_string)
end
end
context "an exif-rotated image missing the exif_rotation tag" do