Access violation in native code with hardware accelerated Android MediaCodec decoder

Question

I aim to use the Android MediaCodec for decoding a video stream, then use the output images for further image processing in native code.

Platform: ASUS tf700t android 4.

Answer 1

I use mediacodec api on nexus 4 and get the output color format of QOMX_COLOR_FormatYUV420PackedSemiPlanar64x32Tile2m8ka. I think this format is a kind of hardware format and only can be rendered by hardware rendering. Interestingly, I find that when I use null and actual Surface to configure the surface for MediaCodec, the output buffer length will be change to a actual value and 0 respectively. I don't know why. I think you can do some experiments on different devices for more results. About hardware accelerating you can see http://www.saschahlusiak.de/2012/10/hardware-acceleration-on-sgs2-with-android-4-0/