The 25-year-old has been a regular feature on the British team ever since making his Olympic debut in Beijing in 2008 however podium performances have been few and far between.
Rock was ranked 27th and 12th in the
He did taste an international podium for the first time ever at the
Rock booked his place with gold at the British Gas Championships last month, overcoming the failure of missing out on a 200m place to do so, and admits it could be now or never for his global medal hopes.
"But a home Games is going to be incredible - it is the perfect chance to get an awesome performance out of myself in front of a mostly British 20,000-strong crowd.
"That will be my chance to get as close to that podium as possible and I think it is all about focusing on day-by-day training and trying to achieve a bit more every day.
"I have a great foundation and can just shift the focus to getting a bit more speed and a bit more
"It is really exciting to freshen things up in training to try and make sure I can achieve that special performance at the Olympic Games."
As the only Brit to have qualified for the 100m butterfly so far, Rock would appear to be in pole position to form part of the 4x100m medley relay team at the Games this summer.
And, having spent last week at a national squad camp with the 37 other British qualified
"It was fantastic being at the camp; there is a real excitement around all of the athletes who are part of the team," he added.
"You look around and people have world medals and Olympic medals and to train with them it makes it so easy to raise your game and give it that little bit more.
"And when the Games come around it is going to give me a wonderful opportunity to achieve something I can be proud of."