Feature/add gst plugin

[Fixstars-momoko]

single frame

Input: GenDC

• 1 Output (only descriptor)
• 1 + 1 Output for 1 component
• N + 1 Output for N valid component
• Less than N+1 Output for N valid component
• More than N+1 Output for N valid component (Expecting error)

Input: non-GenDC

• 1 Output (same as input)
• More than 1 Output (Expecting error)

multiframes

Input: GenDC

• 1 Output (only descriptor)
• 1 + 1 Output for 1 component
• N + 1 Output for N valid component
• Less than N+1 Output for N valid component
• More than N+1 Output for N valid component (Expecting error)

Input: non-GenDC

• 1 Output (same as input)
• More than 1 Output (Expecting error)