Blac Chyna: I Was Framed with My Sunglasses ... Not My Ecstasy!!!

Blac Chyna cops to being drunk at the Austin International Airport, but she's adamant the ecstasy pills police found were NOT hers.

As we reported, cops found 2 pills with emblazoned designs in her sunglasses case. A field test revealed it was MDMA.

Our Chyna sources say she has no idea how the pills ended up in the case. She does say she did not pack her own bags for the trip to London -- with a stopover in Austin. In fact, she says her assistants who normally work for her were not there, and a different person packed for her.

She won't snitch, but our sources say she's strongly implying the person who packed the bags is responsible.

And get this ... our sources say Chyna is incredulous because the type of ecstasy cops found is uncommon. She says people haven't used the drug in pill form for years, favoring powder instead.