{"action":"closed","issue":{"url":"https://api.github.com/repos/Freescale/libimxvpuapi/issues/14","repository_url":"https://api.github.com/repos/Freescale/libimxvpuapi","labels_url":"https://api.github.com/repos/Freescale/libimxvpuapi/issues/14/labels{/name}","comments_url":"https://api.github.com/repos/Freescale/libimxvpuapi/issues/14/comments","events_url":"https://api.github.com/repos/Freescale/libimxvpuapi/issues/14/events","html_url":"https://github.com/Freescale/libimxvpuapi/issues/14","id":161901933,"number":14,"title":"DQT order","user":{"login":"toffe","id":608476,"avatar_url":"https://avatars.githubusercontent.com/u/608476?v=3","gravatar_id":"","url":"https://api.github.com/users/toffe","html_url":"https://github.com/toffe","followers_url":"https://api.github.com/users/toffe/followers","following_url":"https://api.github.com/users/toffe/following{/other_user}","gists_url":"https://api.github.com/users/toffe/gists{/gist_id}","starred_url":"https://api.github.com/users/toffe/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/toffe/subscriptions","organizations_url":"https://api.github.com/users/toffe/orgs","repos_url":"https://api.github.com/users/toffe/repos","events_url":"https://api.github.com/users/toffe/events{/privacy}","received_events_url":"https://api.github.com/users/toffe/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":2,"created_at":"2016-06-23T11:39:32Z","updated_at":"2016-09-18T12:53:49Z","closed_at":"2016-09-18T12:53:49Z","body":"Hi,\r\n\r\nThe imxvpulib inputs the DQT tables in \"natural order\" into the imx-vpu library, which emits them in the same order into the DQT marker of the JPEG header. The DQT should be in zig zag order though according to the JPEG spec.\r\n\r\nIt is not clear to me if the VPU expects another order? There is a table (table 4) with a slightly permuted ordering of a Q Matrix in the VPU API RM. However the imx-vpu lib writes the DQT marker exactly as it is input into the library by imxvpulib."}}
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