Mediacodec 编码过程源码解析
背景：
Mediacodec 编码过程中，会createinptsurface，然后opengl eglcontext 进行绑定，我们就从源码角度剖析整个过程
首先看下createInputSurface的过程
createInputSurface
| C++
static jobject android_media_MediaCodec_createInputSurface(JNIEnv* env,
jobject thiz) {
ALOGV("android_media_MediaCodec_createInputSurface");
sp codec = getMediaCodec(env, thiz);
if (codec == NULL || codec->initCheck() != OK) {
throwExceptionAsNecessary(env, INVALID_OPERATION);
return NULL;
}
// Tell the MediaCodec that we want to use a Surface as input.
sp bufferProducer;
status_t err = codec->createInputSurface(&bufferProducer);
if (err != NO_ERROR) {
throwExceptionAsNecessary(env, err);
return NULL;
}
// Wrap the IGBP in a Java-language Surface.
return android_view_Surface_createFromIGraphicBufferProducer(env,
bufferProducer);
}
jobject android_view_Surface_createFromIGraphicBufferProducer(JNIEnv* env,
const sp& bufferProducer) {
if (bufferProducer == NULL) {
return NULL;
}
sp surface(new Surface(bufferProducer, true));
return android_view_Surface_createFromSurface(env, surface);
}
jobject android_view_Surface_createFromSurface(JNIEnv* env, const sp& surface) {
|