提交数据：
GraphicBufferSource: submitBuffer_l
-> mOMXNode->emptyBuffer (这里经过一系列的封装才能到OMXNodeInstance，不用深究)
-> OMXNodeInstance::emptyBuffer // 此处有个bufferType不明确 ???
-> Rockchip_OMX_EmptyThisBuffer : Rockchip_OMX_Baseport.c
-> 存入inputBufferQueue // pRockchipPort = &pRockchipComponent->pRockchipPort[INPUT_PORT_INDEX];
-> 构建一个消息 message = Rockchip_OSAL_Malloc(sizeof(ROCKCHIP_OMX_MESSAGE));
message->messageType = ROCKCHIP_OMX_CommandEmptyBuffer;
message->messageParam = (OMX_U32) i;
message->pCmdData = (OMX_PTR)pBuffer;
-> 把消息加入队列 Rockchip_OSAL_Queue(&pRockchipPort->bufferQ, (void *)message); // 此处的bufferQ对应的InputBufferProcess
->>>> Rockchip_OMX_EmptyThisBuffer end
-> GraphicBufferSource: emptyGraphicBuffer succeeded
-> GraphicBufferSource: buffer submitted
-> OMXNodeInstance: onMessages
输入线程：
Rkvpu_OMX_Venc.c: Rkvpu_OMX_InputProcessThread
循环
Rkvpu_InputBufferGetQueue : Rkvpu_OMX_VencControl.c
->Rockchip_OSAL_SemaphoreWait
->>>Rkvpu_InputBufferGetQueue end
-> Rkvpu_SendInputData
//仅新建编码器时执行 begin
-> Rockchip_OSAL_GetInfoFromMetaData : Rockchip_OSAL_Android.cpp
-> Rockchip_OSAL_GetANBColorFormat
-> Rockchip_get_gralloc_private : gralloc_priv_omx.cpp
得到 priv_hnd.format: 0x1
-> Rockchip_OSAL_Hal2OMXPixelFormat : Rockchip_OSAL_Android.cpp
得到 ColorFormat: 0x10 这个format表示： OMX_COLOR_Format32bitARGB8888
-> Rockchip_OSAL_OMX2HalPixelFormat(omx_format)
通过上一步得到的ColorFormat，得到 halfFormat = HAL_PIXEL_FORMAT_RGBA_8888
-> 设置p_vpu_ctx 中 rc_mode = 1，设置 encType为 VPU_H264ENC_RGB888
p_vpu_ctx->control(p_vpu_ctx, VPU_API_ENC_GETCFG, (void*)&vpug);
vpug.rc_mode = 1;
p_vpu_ctx->control(p_vpu_ctx, VPU_API_ENC_SETCFG, (void*)&vpug);
H264EncPictureType encType = VPU_H264ENC_RGB888;
p_vpu_ctx->control(p_vpu_ctx, VPU_API_ENC_SETFORMAT, (void *)&encType);
//--- 仅新建编码器时执行 end
-> Rkvpu_ProcessStoreMetaData
-> Rockchip_OSAL_GetInfoRkWfdMetaData
-> Rockchip_OSAL_GetInfoFromMetaData
-> Rockchip_OSAL_GetANBColorFormat 得到 omx_format
-> Rockchip_OSAL_OMX2HalPixelFormat(omx_format) 得到 pVideoEnc->bPixel_format
-> 打开GPU节点测试，如果存在则 pVideoEnc->bRgb2yuvFlag = OMX_TRUE;
gpu_fd = open("/dev/pvrsrvkm", O_RDWR, 0); //这里打开节点接着关闭了，是测试是否可用的意思，并设置pVideoEnc->bRgb2yuvFlag，实际用的地方怀疑在libvpu.so中
close(gpu_fd);
-> Rockchip_OSAL_getANBHandle
-> rga_rgb2nv12 : Rockchip_OSAL_RGA_Process.c
-> rga_convert
-> VPUMemClean : vpu_mem.c
ioctl(vpm_vpu.fd, VPU_MEM_CACHE_CLEAN, &p->offset);
->>> rga_rgb2nv12 end 大约耗时 4ms
->>> Rkvpu_ProcessStoreMetaData end
-> p_vpu_ctx->encoder_sendframe(p_vpu_ctx, &aInput);
-> Rkvpu_InputBufferReturn
-> Rkvpu_OMX_InputBufferReturn
-> pRockchipComponent->pCallbacks->EmptyBufferDone(pOMXComponent, pRockchipComponent->callbackData, bufferHeader);
-> OMXNodeInstance::OnEmptyBufferDone
-> 构建message, type 为 omx_message::EMPTY_BUFFER_DONE，发送到消息处理线程去处理
-> bufferSource->onInputBufferEmptied
-> GraphicBufferSource::onInputBufferEmptied
->>>>> OMXNodeInstance::OnEmptyBufferDone end
->>>> Rkvpu_OMX_InputBufferReturn end
输出线程：
output线程：
Rkvpu_OMX_Venc.c: Rkvpu_OMX_OutputProcessThread
-> Rkvpu_OMX_OutputBufferProcess 消息处理循环
-> Rkvpu_OutputBufferGetQueue(ROCKCHIP_OMX_BASECOMPONENT *pRockchipComponent)
-> Rockchip_OSAL_Dequeue(&pRockchipPort->bufferQ) //从bufferQ中取出一个消息
emptyBuffer流程中queue的消息就是在这里被dequeue的
-> 将dequeue出的msg中的数据，存入Rkvpu_OutputBufferGetQueue的参数中返回
->>>> Rkvpu_OutputBufferGetQueue end
-> Rkvpu_Post_OutputStream(OMX_COMPONENTTYPE *pOMXComponent)
-> p_vpu_ctx = pVideoEnc->vpu_ctx
-> p_vpu_ctx->encoder_getstream(p_vpu_ctx, &pOutput)
该函数怀疑存在于 libvpu.so 中
-> Rkvpu_OutputBufferReturn(pOMXComponent, outputUseBuffer); // Rkvpu_OMX_VencControl.c
-> Rockchip_OMX_OutputBufferReturn(pOMXComponent, bufferHeader) //Rockchip_OMX_Baseport.c
-> pRockchipComponent->pCallbacks->FillBufferDone(pOMXComponent, pRockchipComponent->callbackData, bufferHeader);
->OMXNodeInstance::OnFillBufferDone
