Format of decompressed JPEG when out_color_space is YCbCr/YUV

[Madeleine]

When going directly through the libjpeg-turbo API (not TurboJPEG), what is the format of the output returned by jpeg_read_scanlines when I set the jpeg_decompress_struct to have an out_color_space of YCbCr/YUV? 

Thanks!

[DRC]

jpeg_read_scanlines() with out_color_space==JCS_YCbCr will upsample the
YCbCr planes into packed YCbCr pixels, so essentially it does upsampling
without color conversion. You can get the raw YCbCr planar data by
using jpeg_read_raw_data() instead (look at the source code for the
tjDecompressToYUVPlanes() function in turbojpeg.c for an example.)

[Madeleine Barowsky]

Thank you! 

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