android OMX相关4：编码输入线程和输出线程

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