Supported JPEG file format of Android BSP

[takayuki_ishii]

Hello community, 

In Android BSP document, it have no information about support format of JPEG still image file.

Only MJPEG have little information in NOTE of iMX_Android_Extended_Codec_Release_Note.pdf.

Is it conformed to support JPEG format on MJPEG's one?

Or by default setting of Android BSP, it is using software encoder/decoder of Android for JPEG image.

So it is conformed by Android support format?

I'm using i.mx6dual and Android BSP JP4.2.2_1.1.0-ga.

Best regards,

Ishii.

[joanxie]

do you need jpeg encoder or jpeg decoder?android 4.4.2 supports Saved time of taking pictures by using VPU for JPEG encoder of the Camera.

[takayuki_ishii]

Hello Joan,

Thank you for your response.

I hope to know both encoder and decoder supported file format.

But mainly JPEG decoder.

I think that JPEG encoder is used for Photo image by Camera application.

So it will be support Eixf version ?.?? / YCbCr422 and additionally YCbCr420.

Does encoder can use YCC444 if is it specified as encode format by user programmed application?

Best regards,

Ishii.

[joanxie]

vpu can handle MJPEG decoding, you can use vpu to deocode JPEG, but we suggest that you use opensource to handle this, like jpegdec, and shouldn't support EIXF, can support JFIF format

for vpu, can Support 4:2:0, 4:2:2, 2:2:4, 4:4:4 and 4:0:0 color format

[takayuki_ishii]

Hello Joan,

Thank you for your reply.

In default build of Android BSP JB4.2.2_1.1.0-ga is used software JPEG decoder?

If so, does it have some specification document of software JPEG decoder?

I hope to know which format does it can encode/decode by default BSP image of Android BSP JB4.2.2_1.1.0-ga release.

Best regards,

Ishii.

[takayuki_ishii]

Hello community,

Don't you have any information about it?

If jpeg encode/decode will be used libjpeg, I can report a supported format

in the document of libjpeg.doc.

Best regards,

Ishii.