android jni中使用native Window渲染ffm

android jni中使用native Window渲染ffmpeg frame中的rgba数据
初始化：

    jobject surface=NULL;
    ANativeWindow* nativeWindow=NULL;
    ANativeWindow_Buffer outBuffer;

    nativeWindow=ANativeWindow_fromSurface(env, surface);

使用：

                ANativeWindow_setBuffersGeometry(nativeWindow, filt_frame->width, filt_frame->height,
                                                 WINDOW_FORMAT_RGBA_8888);
                ANativeWindow_lock(nativeWindow, &outBuffer, NULL);
                uint8_t *dst = (uint8_t *) outBuffer.bits;
                int destStride = outBuffer.stride * 4;
                uint8_t *src = filt_frame->data[0];
                int srcStride = filt_frame->linesize[0];
                for (int i = 0; i < filt_frame->height; ++i) {
                    memcpy(dst + i * destStride, src + i * srcStride,
                           static_cast<size_t>(srcStride));
                }
                ANativeWindow_unlockAndPost(nativeWindow);

关闭：

        if (nativeWindow!=NULL)
            ANativeWindow_release(nativeWindow);

最重要在cmake中添加库

find_library( # Sets the name of the path variable.
        lnative_window_jni-lib

        # Specifies the name of the NDK library that
        # you want CMake to locate.
        android )