Miracast分析

Just write a little notes.

进入RTSP状态时启动RTSP线程。

RTSP状态分三个阶段：

第一阶段进行初始化，主要完成socket连接，

1. 启动RTSP线程：

1.1 连接TX的RTSP server，默认端口号7236（TCP）；

1.2 设置RTP过滤器参数（IP和Port），默认端口号24030（UDP）；

1.3 创建I2C server socket，监听的默认端口号23030（TCP），启动I2C线程；

1.4 创建HDCP2 server socket，监听的默认端口号25030（TCP），启动HDCP线程；

2. RTSP数据交互。

第二阶段中，经过几次RTSP交互，trigger SETUP事件，SETUP做这几件事，

1. 创建RTP socket，启动RTP线程；

2. 初始化Kernel RTP；

1.1 通过/dev/xxx获取共享内存的物理地址；

1.2 通过mmap将物理地址映射到线程的虚拟地址空间；

1.3 将物理地址设置给Media Player的播放路径；

3. Start Media Player；

Media Client

main()

system_init()

system_ipc = new RT_MediaConfig()

system_ipc->initCheck()

m_ipc.createConnection() // Unix Socket: /tmp/MediaPlayRequest

xSendCmd(CMD_CONFIG_CONNECTION)

set_HDMI_display()

VoutUtil *voutUtil = &VoutUtil::instance(true)

mInstance = new VoutUtil(bNeedInitRPC) // VoutUtil.cpp

initRPC()

AUDIO_AGENT_0_register(rnode)

ipc_register(AUDIO_AGENT_0)

ReplyHandler_register(rnode)

ipc_register(Reply_Handler)

initRPCProxy(rnode)

openRPC() // read: rpc2 rpc3 rpc6 rpc7

openStubRPC() // write: rpc0 rpc1 rpc4 rpc5

for(registerRPC())

for(pthread_create(RPCProxy_loop())) // x3

MediaPlayerCreate()

g_MediaPlayer= new RTMediaPlayer(false)

g_MediaPlayer->initCheck()

rtp_InitKernelRtp(g_MediaPlayer)

open("/dev/mcp_core")

open("/dev/mem")

init_and_kmap()

fopen("/proc/aeiudp")

MediaPlayerDataSourceSet(g_MediaPlayer)

g_MediaPlayer->setDataSource(g_mplayer_path)

MediaFlowInit()

g_MediaPlayer->prepare()

class RTMediaPlayer

setDataSource()

m_ipc.createConnection() // Unix Socket: /tmp/MediaPlayRequest

pthread_create(procEntry)

pthread_create(workerProcEntry)

mListener = new RTMediaPlayerEventListener

mRvsd = new RVSD(m_rvsdID)

init(handle)

pRvsdInfo = new RVSD_INFO(handle)

mVDecRtk(NULL)

mRvsd->setListener(mListener)

mRvsd->start() // rvsd_entry.cpp

rvsd_run() // rvsd_maincore.cpp

pthread_create(rvsd_thread)

socket_main()

ipc_handler()

server_sockfd = socket(/tmp/rvsdsocket)

while(...)

select(server_sockfd )

client_sockfd = accept()

rvsd_handle_InBandCMD() // rvsd_InBandCMD.cpp

rvsd_thread线程创建服务器socket，如果有client来连接，调用rvsd_handle_InBandCMD()与这个socket交互。这里client是DvdPlayer。

在rvsd_handle_InBandCMD()中会创建VDec_Rtk_decode_pthread线程，即VDec_decode_loop()函数。

rvsd_handle_InBandCMD()

rvsdRingBuffer_init() // Malloc Ring Buffer

while (1)

poll(client_sockfd)

check_create_codec_handler()

rvsd_create_codec_handler()

pRvsdInfo->mVDecRtk = new VDecRtk)

pthread_create( VDec_Rtk_decode_pthread)

VDec_decode_loop() // rvsd_VDecRtk.cpp

mIonFd = ion_open()

recv(client_sockfd)

switch()

case ENUM_IPC_RVSD_VIDEO_INIT: // rvsd_video_init

case ENUM_IPC_RVSD_VIDEO_REF_CLOCK: //get RefClock

case ENUM_IPC_RVSD_VIDEO_FLUSH: //AGENT_FLUSH

case ENUM_IPC_RVSD_VIDEO_PAUSE: //AGENT_PAUSE

case ENUM_IPC_RVSD_VIDEO_RUN: //AGENT_RUN

case ENUM_IPC_RVSD_VIDEO_PRIVATE_INFO: //Get Video PrivateInfo

case ENUM_IPC_RVSD_VIDEO_ERROR_CONCEALMENT: //SetErrConcealment

case ENUM_IPC_RVSD_VIDEO_GET_SEQUENCE_INFO: // GetVideoSequenceInfo

case ENUM_IPC_RVSD_VIDEO_VO_INSTANCE_ID://receive VO instance ID from Dvdplayer

case ENUM_IPC_RVSD_VIDEO_STOP: //AGENT_STOP

case ENUM_IPC_RVSD_VIDEO_DESTROY: //AGENT_DESTROY

RVSD CMD

Boot

28 VO_INSTANCE_ID
50 SP_CREATE
21 VIDEO_BS_HANDLER
21 VIDEO_BS_HANDLER
5d VIDEO_INIT_MPEG2_CC_RING_BUF
51 SP_INIT_RING_BUF
57 SP_ENABLE
16 VIDEO_INIT
5a SP_CONFIG
57 SP_ENABLE
27 VIDEO_GET_SEQUENCE_INFO

First

54 SP_PAUSE
24 VIDEO_PAUSE
34 VIDEO_ERROR_CONCEALMENT
34 VIDEO_ERROR_CONCEALMENT
20 VIDEO_REF_CLOCK
55 SP_RUN
25 VIDEO_RUN
56 SP_FLUSH
23 VIDEO_FLUSH
34 VIDEO_ERROR_CONCEALMENT
56 SP_FLUSH
23 VIDEO_FLUSH
16 VIDEO_INIT
34 VIDEO_ERROR_CONCEALMENT
33 VIDEO_PRIVATE_INFO
56 SP_FLUSH
23 VIDEO_FLUSH
34 VIDEO_ERROR_CONCEALMENT
27 VIDEO_GET_SEQUENCE_INFO

Disconnect

33 VIDEO_PRIVATE_INFO
27 VIDEO_GET_SEQUENCE_INFO
26 VIDEO_SEEK
54 SP_PAUSE
24 VIDEO_PAUSE
53 SP_STOP
29 VIDEO_STOP

Persistent/First

54 SP_PAUSE
24 VIDEO_PAUSE
34 VIDEO_ERROR_CONCEALMENT
34 VIDEO_ERROR_CONCEALMENT
20 VIDEO_REF_CLOCK
56 SP_FLUSH
55 SP_RUN
25 VIDEO_RUN
23 VIDEO_FLUSH
34 VIDEO_ERROR_CONCEALMENT
33 VIDEO_PRIVATE_INFO

Disconnect

33 VIDEO_PRIVATE_INFO
54 SP_PAUSE
24 VIDEO_PAUSE
53 SP_STOP
29 VIDEO_STOP

End

Media Server

main()

system_init()

firmware_init_No_R_PROGRAM()

AUDIO_AGENT_0_register(rnode)

ReplyHandler_register(rnode)

initRPCProxy(rnode)

openRPC()

openStubRPC()

for(registerRPC())

for(pthread_create(RPCProxy_loop())) // x3

aei_create_shared_memory()

gv_ion_fd = ipc_fd = open("/dev/ion")

ioctl(ION_IOC_ALLOC)

ioctl(ION_IOC_PHYS)

ioctl(ION_IOC_MAP)

ptr = mmap(size) // size=8MB+DESC_SIZE, DESC_SIZE=4KB HDCP desc size

fopen("/proc/aeiudp")

fprintf(fd, "M %lX %X %d %d\n", phyAddr, size, gv_map_fd, DESC_SIZE);

gv_hdcp_desc_ptr = ptr

gv_ts_stream_ptr = ptr + DESC_SIZE

gv_ts_stream_phyAddr = phyAddr + DESC_SIZE

audio_firmware_configure()

board_init()

/*

根据programID， versionID和opt创建一个CLNT_STRUCT结构体

programID=VIDEO_SYSTEM=201

versionID=

*/

clnt = prepareCLNT() //

SetVO(clnt)

VIDEO_RPC_VOUT_ToAgent_SetBackground_0()

ConfigVoutMixerOrder()

initPLL()

MediaPlayServer::getMediaPlayServer()

m_pInstance = new MediaPlayServer()

xCreateConnection("/tmp/MediaPlayRequest")

m_pThread = new CThread(MediaPlayServer::procEntry)

xProcEntry()

m_pThread->Run()

fopen("/sys/kernel/rtk_pu/pu_memsize")

VideoPlayback类型定义在Application/AppClass/Class/Playback/VideoPlayback.cpp中，VideoPlayback在LoadMedia()时调用ReconstructFlow()，该函数创建一系列对象，包括FlowManager、各个Filter、CReferenceClock对象，然后将Filter添加到FlowManager里面，FlowManager还负责将各Filter的Pin按一定规则connect起来。

FlowMannager管理的Filter有：

CNavigationFilter Filters/NavigationFilter/CNavigationFilter.cpp

CMPEG2Decoder Filters/VideoDecoder/VDecodeMPEG2/CMPEG2Decoder.cpp

CVideoOutFilter Filters/VideoDecoder/VDecodeMPEG2/CVideoOutFilter.cpp

CFilterSpu Filters/SPUDecoder/CFilterSpu.cpp

TTDecodeFilter Filters/TTDecodeFilter/TTDecodeFilter.cpp

CCDecodeFilter Filters/CCDecodeFilter/CCDecodeFilter.cpp

MediaPlayServer::xProcEntry()

while()

xAccept(&m_client[index])

xProcessCommand(pClient)

PLBK:

pClient->flow.pPlayback = new VideoPlayback()

PRSN:

xLoadMedia()

pPlayback->LoadMedia()

ReconstructFlow()

m_pFManager = new CPlaybackFlowManager()

m_pSource = new CNavigationFilter

m_pRefClock = new CReferenceClock()

m_pCCDecoder = new CCDecodeFilter()

m_pTTDecoder = new TTDecodeFilter()

m_pVDecoder = new CMPEG2Decoder()

m_pVideoOut = new CVideoOutFilter(FILTER_TYPE_VO)

m_pSPUDecoder = new CFilterSpu

m_pFManager->AddFilter(m_pSource, "DVD Source")

m_pFManager->AddFilter(m_pVDecoder, "DVD VDecoder")

m_pFManager->AddFilter(m_pVideoOut, "VideoOut Filter")

m_pFManager->AddFilter(m_pSPUDecoder, "DVD SPU Decoder")

m_pFManager->AddFilter(m_pTTDecoder, "TTDecoder")

m_pFManager->AddFilter(m_pCCDecoder, "CCDecoder")

m_pVDecoder->SetRefClock(m_pRefClock)

m_pSource->EnumPins(&pEnumPins)

pEnumPins->Next(&pPinVideo)

...

m_pVDecoder->FindPin(&pPin2, "InputPin 1")

m_pFManager->ConnectDirect(pPinVideo, pPin2, NULL)

m_pNavControl->LoadMedia() == CNavigationFilter::LoadMedia()

SelectInputPlugin()

SelectDemuxPlugin()

PLAY:

pPlayback->m_pFManager->Run()

((CBaseFilter*)(m_IFilterArr[i]))->Pause(State_Paused_Running)

CNavigationFilter::StartStreaming()

osal_ThreadBegin(ThreadProcEntry)

CNavigationFilter::ThreadProc()

class MediaPlayServer

CLIENT_INFO m_client[2]

FLOW_INFO flow

VideoPlayback *pPlayback

CPlaybackFlowManager *m_pFManager

CNavigationFilter *m_pSource

CReferenceClock *m_pRefClock

CMPEG2Decoder *m_pVDecoder

CVideoOutFilter *m_pVideoOut

CFilterSpu *m_pSPUDecoder

INavControl *m_pNavControl

VoutUtil m_voutUtil

系统启动

COFG   4 16_0_0_0
PLBK 4   36_0_0_0
SURL 56   socket:///tmp/MediaData?container=ts?sharedMem=245460992
PRSN   4   1_0_0_0
PROP 8   1_0_0_0_1_0_0_0
FUNC 23 ____S_e_t_D_i_s_p_l_a_y_R_a_t_i_o__7_5__
GVSI 4   0_0_0_0

系统启动后第一次miracast连接

SVEL 8 0_16_0_0_0_16_0_0
PLAY 0
SVDR 4 1_0_0_0
GVSI 4 1_0_0_0
GASI 4 255_255_255_255

系统启动后第一次miracast断开

SVDR 4 0_0_0_0
STOP 4 1_0_0_0
SVLD 4 1_0_0_0
PROP 8 1_0_0_0_1_0_0_0
FUNC 23 ____S_e_t_D_i_s_p_l_a_y_R_a_t_i_o__7_5__

系统启动后第二次miracast连接

SVEL 8 0_16_0_0_0_16_0_0
PLAY 0
SVDR 4 1_0_0_0

系统启动后第二次miracast断开

SVDR 4   0_0_0_0
STOP 4   1_0_0_0
SVLD 4   0_0_0_0
PROP 8   1_0_0_0_1_0_0_0
FUNC 23 ____S_e_t_D_i_s_p_l_a_y_R_a_t_i_o__7_5__

size      =[0x801000][8392704]
offset    =[0x1000][4096]
addr     =[0x4175000][68636672]

MemHeaderPtr   =[0xf618 4000]
PhyAddr               =[0x417 6000] [68640768]
ts_size                  =[0x800]    [2048]
nav_size              =[0x3000]   [12288]
total_size             =[0x80 0000] [8388608]
ts_cnt                    =[4086]

pagesize =[0x1000] [4096]

------------------------------------------- <--rtp_mem_ptr
4096 (header)
------------------------------------------- <--nav_mem_ptr
4096*3          4096 (header)
(nav_size)    -------------------------- <--nav_ptr
                       4096
                   --------------------------
                     4096
------------------------------------------- <--data_mem_ptr
4096 (header)
------------------------------------------- <--data_ptr
2048             tsu
                      --------------------------
                      payload
-------------------------------------------
2048 tsu
                      ---------------------------
                      payload
-------------------------------------------
2048            tsu
                     ---------------------------
                     payload
-------------------------------------------
2048            tsu
                     ---------------------------
                     payload
-------------------------------------------

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