CODEWITHSUNDEEP
androidopengl-esandroid-ndkandroid-mediacodec
S.Jins
S.Jins

Reputation: 41

Android NDK Output MediaCodec to a GL Texture

In Android Java side, following code can be used to output the mediacodec to a GL texture.

int [] hTex = new int[1];
GLES20.glGenTextures(1, hTex, 0);
SurfaceTexture mSTexture = new SurfaceTexture(hTex[0]);
Surface s = new Surface(mSTexture);
mPlayer = new PlayerThread(s);

But how to do that in NDK?

I can useglGenTextures to create a GL texture, but the param type of AMediaCodec_configure is ANativeWindow*, is there a way to convert it?

Upvotes: 2

Views: 1724

Answers (1)

Sijia R
Sijia R

Reputation: 11

The project I am recently working on also has to get the ANativeWindow* from a gl texture. Here is how I did it with JNI:

First, get a surfacetexture 'jobject' from your gl texture

jclass surfacetexture_class = Env->FindClass("android/graphics/SurfaceTexture");
jmethodID surfacetexture_init = Env->GetMethodID(surfacetexture_class, "<init>", "(I)V");
jobject surfacetexture_obj = Env->NewObject(surfacetexture_class, surfacetexture_init, (jint)your_gl_texture);

Then, convert the jobject surfacetexture to native ASurfaceTexture* using ASurfaceTexture_fromSurfaceTexture(Env, surfacetexture_obj)

Finally, ASurfaceTexture_acquireANativeWindow(surfacetexture) gives you the ANativeWindow* associated with your gl texture

Upvotes: 1

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