Simple YCbCr-Viewer (YUV)

Supports the following formats:

• YV12
• IYUV
• YUVY
• UYVY
• YUY2
• YV1210
• Y42210

YV1210 is the same as YV12 with 10bpp. Since SDL does not support this format, I fake it by converting it to standard 8bpp YV12 prior to viewing.

Y42210 is YCbCr 4:2:2 planar with 10-bpp. Since SDL does not support this format, I fake it by converting it to standard 8bpp YVYU prior to viewing.

Basically, because that's whats SDL supports. Other YCbCr (YUV) formats are simple to add as long as they are 4:2:0 or 4:2:2 8-bpp...

Features

• Play
• Pause
• Rewind
• Single Step Forward
• Single Step Backwards
• Zoom In by a factor of 1..n
• Zoom Out by a factor of 1..n
• Display a 16x16 grid on top of a frame
• Dump Macro-Block-data to stdout for MB pointed to by mouse
• Only display Luma data
• Only display Cr data
• Only display Cb data
• Diff two files of the same size and format
• PSNR calculation
• Master/Slave mode that allows two instances of the binary to communicate using a message-queue. Commands issued in the Master are also executed in the Slave. Main usage is to single-step two clips side-by-side to compare them. Works regardless of format used
• Title reflects mode, feature used, including frame number and size.
• Histogram for the different color planes, per frame as csv-data to stdout (for now at least)

Usage

./yv filename width height format
./yv foreman_cif.yuv 352 288 YV12

To use MASTER/SLAVE, type the following command in two different shells or send them to the background using a & at the end:

./yv foreman_1.yuv 352 288 YV12
./yv foreman_2.yuv 352 288 YV12

In the first window, press F1 (title should be updated to show the mode. In the second window, press F2 (title should be updated to show the mode). Commands given in window1 should be executed in window2.

To display diff between two files of the same size and format, just add file as the last argument (computes and displays differences in luma value only, PSNR value is written to stdout):

./yv filename width height format diff_file
./yv foreman_cif.yuv 352 288 YV12 foreman_filtered_cif.yuv

Supported commands

SPACE - Play clip
RIGHT - Single step 1 frame forward
LEFT - Single step 1 frame backward
r - Rewind
UP - Zoom in
DOWN - Zoom out
g - Enable grid-mode
m - Enable MB-mode, point and click to
    print MB-data to stdout
h - histogram, 1 per color plane
F5 - Toggle viewing of Luma data only
F6 - Toggle viewing of Cb data only
F7 - Toggle viewing of Cr data only
F8 - Display all color-planes
q - Quit
F1 - MASTER-mode
F2 - SLAVE-mode
F3 - NONE-mode, i.e. disable MASTER/SLAVE-mode

Disclaimer

Only verified on a Linux based system...