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TPESystem/Media/MediaSupportFileFormat: Difference between revisions
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TPESystem/Media/MediaSupportFileFormat (view source)
Revision as of 01:45, 24 December 2013
, 24 December 2013→Media Supported File Format
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Related bugs: {{bug|942078}} | Related bugs: {{bug|942078}} | ||
* ''' File Type Check''' | |||
Files are categorized in 3 groups, pictures, music, and videos @gecko/toolkit/content/devicestorage.properties. | Files are categorized in 3 groups, pictures, music, and videos @gecko/toolkit/content/devicestorage.properties. | ||
You need to check if your file extension is in the following list. Otherwise it will be not recognized as media files. | You need to check if your file extension is in the following list. Otherwise it will be not recognized as media files. | ||
** Pictures: | |||
''*.jpe; *.jpg; *.jpeg; *.gif; *.png; *.bmp | ''*.jpe; *.jpg; *.jpeg; *.gif; *.png; *.bmp'' | ||
** Music: | |||
''*.mp3; *.ogg; *.m4a; *.m4b; *.m4p; *.m4r; *.3gp; *.mp4; *.m3u; *.pls; *.opus; *.amr | ''*.mp3; *.ogg; *.m4a; *.m4b; *.m4p; *.m4r; *.3gp; *.mp4; *.m3u; *.pls; *.opus; *.amr'' | ||
** Videos: | |||
''*.mp4; *.mpeg; *.mpg; *.ogv; *.ogx; *.webm; *.3gp; *.ogg; *.m4v;'' | ''*.mp4; *.mpeg; *.mpg; *.ogv; *.ogx; *.webm; *.3gp; *.ogg; *.m4v;'' | ||
*'''MIME Type Get''' | |||
For Gaia, <br> | For Gaia, <br> | ||
Before getting metadata and thumbnail then, canPlayType is used to check if it is valid video file by passing MIME type to gecko to check. <br> | Before getting metadata and thumbnail then, canPlayType is used to check if it is valid video file by passing MIME type to gecko to check. <br> | ||
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This MIME type is obtained from extension list extraMimeEntries @http://dxr.mozilla.org/mozilla-central/source/uriloader/exthandler/nsExternalHelperAppService.cpp#483 <br> | This MIME type is obtained from extension list extraMimeEntries @http://dxr.mozilla.org/mozilla-central/source/uriloader/exthandler/nsExternalHelperAppService.cpp#483 <br> | ||
So if your file extension is not in the list. You will get a empty MIME. | So if your file extension is not in the list. You will get a empty MIME. | ||
*'''Sniff''' | |||
If you file passes those two checks explained above, it doesn't mean thumbnail can be generated or can be played successfully. Those checks only try to find a match in the mapping list of MIME and file extension. <br> | If you file passes those two checks explained above, it doesn't mean thumbnail can be generated or can be played successfully. Those checks only try to find a match in the mapping list of MIME and file extension. <br> | ||
In Gecko, DataSource will sniff the files and try to find the corresponding extractor. | In Gecko, DataSource(frameworks/base/media/libstagefright/DataSource.cpp sniff()) will sniff the files and try to find the corresponding extractor. You can find how many and which formats supported in RegisterDefaultSniffers(). | ||