Is it possible to create multiple instances of OMXCodec using stagefright

Question

I want to use libstagefright.so in android phones for media operations. I have explored example given in this page. I have been trying to implement the same. While testing this implementation for multiple OMXCodec instances, it's output buffer conflicts with each other.

I have developed an android project in eclipse and linked libstagefright under JNI. I have added two classes CustomDataSource (Which derives MediaSource) and CustomOmxDecoder. CustomDataSource class implements all virtual methods of MediaSource. In CustomOmxDecoder class, I call OMXCodec::Create method. Then I have created two threads which have individual instance of CustomOmxDecoder. Using this instances I call a method ProcessNextFrame in which I call the main, videoDecoder->read() method. This is how my setup is.

Now, When I run the app with above mentioned setup. OMXCodec decodes frames of both source but when I render it on surface, is shows me conflicted output. It seems like decoded buffer of both source get meshed up internally somehow. I am creating two h264 decoder simultaneously. What can be the problem here? Can it be related to MediaBufferGroup? I acquirebuffer in CustomDataSource and release buffer in CustomOmxDecoder's ProcessNextFrame after calling videoDecoder->read() call.

Any suggestion will be great. Thanks.

Answer 1

I have tested and solved my issue, doubting that multiple instances of OMXCodec is possible. The issue was in my code. And on fixing up, I can see OMXCodec's mulitple instance running stable and smooth. So, Yes, Mulitple instances of OMXCodec is possbile.

Thank you all.