Bandcamp images work with image IDs, which provide different resolutions.
Images on Bandcamp are not always squares, and some IDs respect aspect ratios
where some others not.
The extractor will only use the ones which preserve aspect ratio and will not
provide original images, for performance and size purposes.
Because of this aspect ratio preservation constraint, only one dimension will
be known at a time.
The image IDs with their respective dimension used are:
- 10: 1200w;
- 101: 90h;
- 170: 422h;
- 171: 646h;
- 20: 1024w;
- 200: 420h;
- 201: 280h;
- 202: 140h;
- 204: 360h;
- 205: 240h;
- 206: 180h;
- 207: 120h;
- 43: 100h;
- 44: 200h.
(Where w represents the width of the image and h the height of the image)
Note that these dimensions are theoretical because if the image size is less
than the dimensions of the image ID, it will be not upscaled but kept to its
original size.
All these resolutions are stored in a private static list of ThumbnailSuffixes
in BandcampExtractorHelper, in which the methods to get mutliple images have
been added:
- getImagesFromImageUrl(String): public method to get images from an image URL;
- getImagesFromImageId(long, boolean): public method to get images from an
image ID;
- getImagesFromImageBaseUrl(String): private utility method to get images from
the static list of ThumbnailSuffixes from a given image base URL, containing
the path to the image, a "a" letter if it comes from an album, its ID and an
underscore.
Some existing methods have been also edited:
- the documentation of getImageUrl(long, boolean) has been changed to reflect
the Bandcamp images findings;
- getThumbnailUrlFromSearchResult has been renamed to
getImagesFromSearchResult, and a documentation has been added to this method.
The method replaceHttpWithHttps of the Utils class has been also used in
BandcampExtractorHelper instead of doing manually what the method does.
The default avatar picture was used when no profile picture was found, but it
was removed and split in multiple images.
Thumbnails' size is not known, as this data is not provided by the API.
This method, getThumbnailsFromPlaylistOrVideoItem, has been added in
PeertubeParsingHelper and returns the two image variants for playlists and
videos.
Four new static methods have been added in PeertubeParsingHelper to do so:
- two public methods to get the corresponding image type:
getAvatarsFromOwnerAccountOrVideoChannelObject(String, JsonObject) and
getBannersFromAccountOrVideoChannelObject(String, JsonObject);
- two private methods as helper methods: getImagesFromAvatarsOrBanners(String,
JsonObject, String, String) and getImagesFromAvatarOrBannerArray(String,
JsonArray).
These new public and static methods, added in SoundcloudParsingHelper,
getAllImagesFromArtworkOrAvatarUrl(String) and
getAllImagesFromVisualUrl(String) (which call a common private method,
getAllImagesFromImageUrlReturned(String, List<ImageSuffix>, List<Image>)),
return an unmodifiable list of JPEG images containing almost every image
resolution provided by SoundCloud except the original size and the tiny
resolution (for artworks and avatars, as the image size is 20x20 for artworks
and 18x18 for avatars, so very close to or equal to the t20x20 resolution):
- for artworks and avatars:
- mini: 16x16;
- t20x20: 20x20;
- small: 32x32;
- badge: 47x47;
- t50x50: 50x50;
- t60x60: 60x60;
- t67x67: 67x67;
- large: 100x100;
- t120x120: 120x120;
- t200x200: 200x200;
- t240x240: 240x240;
- t250x250: 250x250;
- t300x300: 300x300;
- t500x500: 500x500.
- for visuals/user banners:
- t1240x260: 1240x260;
- t2480x520: 2480x520.
Duplicated code in two methods of SoundcloudParsingHelper
(getUsersFromApi(ChannelInfoItemsCollector, String) and
getStreamsFromApi(StreamInfoItemsCollector, String, boolean)) has been merged
into one common private method, getNextPageUrlFromResponseObject(JsonObject).
Splitting YoutubeMusicSearchExtractor's InfoItemExtractors into separate
classes (YoutubeMusicSongOrVideoInfoItemExtractor,
YoutubeMusicAlbumOrPlaylistInfoItemExtractor and
YoutubeMusicArtistInfoItemExtractor) allows to simplify
YoutubeMusicSearchExtractor,improves reading and applying changes to InfoItems
(no more losing at least quarter of a line due to indentations).
These InfoItems, in which the image changes have been applied, don't extend the
YouTube ones anymore, as most methods were overridden and the few ones that are
not don't apply in YouTube Music items responses, so it was useless to extend
them.
The code of YoutubeMusicSearchExtractor have been also improved a bit.
Unmodifiable lists of Images are returned, parsed from a given YouTube
"thumbnails" JSON array.
These methods will be used in all YouTube extractors and InfoItems, as the
structures between content types (videos, channels, playlists, ...) are common.
The goal of this utility class is to simply store suffixes which need to be
appended to image URLs, in order to get images at the suffix resolution.
This class contains four properties: the suffix (as a string), the height,
the width (as integers) and the estimated resolution level of the image
corresponding to the one represented by the suffix.
Objects of this serializable class contains four properties: a URL (as a
string), a width, a height (represented as integers) and an estimated
resolution level, which can be constructed from a given height.
Possible resolution levels are:
- UNKNOWN: for unknown heights or heights <= 0;
- LOW: for heights > 0 & < 175;
- MEDIUM: for heights >= 175 & < 720;
- HIGH: for heights >= 720.
Getters of these properties are available and the constructor needs these four
properties.
The addition of this support required to turn the isCarouselHeader boolean into
an enum containing all supported channel headers named HeaderType.
Also assert that the page has been fetched where needed to avoid
NullPointerExceptions when the channel page has been not fetched and remove the
getChannelHeaderJson method in YoutubeChannelExtractor, method for which its
code has been moved to its sole usage after the new headers support changes.
The non-null assertion was made on the exception message instead of the string
to check, causing a NullPointerException if the string to check was null.
Note that this introduces a "Raw use of parameterized class 'InfoItemsPage'" warning, but it can be ignored since the type missing would be <InfoItem>, and StreamInfoItem extends InfoItem
