remote-play

了解media remote playback程序

更新記錄

item	note
20161124	第一版

media 程序

產生下例5個thread

ThreadHttpStream
- boa介面(/tmp/media_fdipc.sck)
- 將需求(video%d.m4v,videocif%d.m4v)加入(gMainHttpList[16],gHttpList[16])串列
- 產生ThreadHttpStreamSend 32條thread(大小碼流各16條)
- ThreadHttpStreamSend:將資料送到client
ThreadP2pStream
Rmp_ManagerThd
- 將remote playback需求(playback.m4v)加到gAgentList,設定gPlayBackSpeed等
Rmp_ReadFrameThd
- 根據gAgenttList，傳送stream給client
ThreadAcceptPlayBack
- boa介面(/tmp/playbackidx_fdipc.sck)

regist_ShmClient(shm_path,shm_size)
- shm_open(shm_path, O_RDWR, (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) );
- mmap(NULL, shm_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
start_thread()
- pthread_attr_init(&attr)
- pthread_attr_setdetachstate(&attr,PTHREAD_CREATE_DETACHED)
- pthread_create(&thread_id, &attr, func, param)
  由於程式裡面沒有pthread_join 或 pthread_detach，
  因此需要代入PTHREAD_CREATE_DETACHED
Set Detach State
- When a thread is created detached (PTHREAD_CREATE_DETACHED), its thread ID and other resources can be reused as soon as the thread terminates.

ThreadHttpStream

ThreadHttpStream
- 產生大小碼流各16條
  ThreadHandle -> ThreadHttpStreamSend
  gMainThreadHandle -> ThreadHttpStreamSend
- 接受由boa傳進來的cgi command (/tmp/media_fdipc.sck)
- 將需求(video%d.m4v,videocif%d.m4v)加入(gMainHttpList[16],gHttpList[16])串列

收到範例如下

--------------  -----------------------------------------------  ----------------
    0 00000000  2f 76 69 64 65 6f 63 69 66 31 35 2e 6d 34 76 00  /videocif15.m4v.
   16 00000010  26 68 74 74 70 5f 75 73 65 72 5f 61 67 65 6e 74  &http_user_agent
   32 00000020  3d 4d 6f 7a 69 6c 6c 61 2f 34 2e 30 20 28 63 6f  =Mozilla/4.0 (co
   48 00000030  6d 70 61 74 69 62 6c 65 3b 20 4d 53 49 45 20 37  mpatible; MSIE 7
   64 00000040  2e 30 29 26 68 74 74 70 5f 72 65 6d 6f 74 65 5f  .0)&http_remote_
   80 00000050  61 64 64 72 3d 36 31 2e 32 32 31 2e 32 32 35 2e  addr=61.221.225.
   96 00000060  33 37 26 68 74 74 70 5f 72 65 6d 6f 74 65 5f 70  37&http_remote_p
  112 00000070  6f 72 74 3d 33 34 30 31 34 26 68 74 74 70 5f 61  ort=34014&http_a
  128 00000080  75 74 68 65 6e 74 3d 42 61 73 69 63 20 59 57 52  uthent=Basic YWR
  144 00000090  74 61 57 34 36 59 57 52 74 61 57 34 3d 00        taW46YWRtaW4=.
--------------  -----------------------------------------------  ----------------

videocif15.m4v
說明需求連線為小碼第15CH
http_remote_addr
http_remote_port
http_authent=Basic
- Decode from Base64 format
  將YWRtaW46YWRtaW4代入

其它

media_check.cgi

1 2	會回傳=>Check Media Process Status, MainStream=0, SubStream=0 (即MainConnectNumber, ConnectNumber 大小碼流連線數)

media_clear.cgi

會回傳=> Release Media Process Connections, MainStream=0, SubStream=0
清除目前連線數
 loop i=0-15
 ThreadHttp_ClearList(i, 1);	// main stream
 ThreadHttp_ClearList(i, 0);	// sub stream

ThreadHttpStreamSend

處理自已頻道(is_big,channel)需求
- 回應client 200 OK
- 回應client碼流資訊
- ReadFromFrameBufferPTS2: 取得MainMediaBuffer_1資料
- ThreadHttp_Iterator: h264資料如何傳給送client

ReadFromFrameBufferPTS2

SManager_RecvProprietaryDataxx:收到碼流，將資料copy一份到MainMediaBuffer_1
CopyToFrameBuffer(MainMediaBuffer_1,ch,data,FrameSize,,)
ReadFromFrameBufferPTS2將資料取出,判斷frame type，決定下個state

ThreadHttp_Iterator

http head

Video Head

static char VideoHead[] =
{
	"%s\r\n"
	"Content-Type: image/mpeg4\r\n"
	"Content-Length: %d\r\n"
	"X-Status: 0\r\n"
	"X-Tag: %d\r\n"
	"X-Flags: 0\r\n"
	"X-Alarm: 0\r\n"
	"X-Framerate: %d\r\n"
	"X-Resolution: %d*%d\r\n"
	"X-Audio: 1\r\n"
	"X-Time: %ld\r\n"
	"X-GMTTime: %ld\r\n"
	"X-PTS: %ld\r\n"
	"X-CamTime: %llu\r\n\r\n"
};

Audio Head

static char AudioHead[] =
{
	"%s\r\n"
	"Content-Type: audio/x-wav\r\n"
	"Content-Length: %d\r\n"
	"X-Codec: U-LAW\r\n"
	"X-Bitrate: 8000\r\n"
	"X-Time: %u\r\n"	
	"X-GMTTime: %ld\r\n"
	"X-PTS: %ld\r\n"
	"X-Tag: %ld\r\n"
	"X-CamTime: %llu\r\n\r\n"
};

Http 200OK Head

static char HttpHeadOk[] =
{
	"HTTP/1.1 200 OK\r\n"
	"Server: %s\r\n"	/* mac address */
	"Connection: Close\r\n"
	"Pragma: no-cache\r\n"
	"Cache-Control: no-store\r\n"
	"Content-Type: multipart/x-mixed-replace;boundary=" Boundary_NAME
	"\r\n\r\n"
};

Rmp_ManagerThd

收到範例如下

--------------  -----------------------------------------------  ----------------
    0 00000000  2f 70 6c 61 79 62 61 63 6b 2e 6d 34 76 00 63 68  /playback.m4v.ch
   16 00000010  61 6e 6e 65 6c 3d 34 26 73 70 65 65 64 3d 31 26  annel=4&speed=1&
   32 00000020  73 74 69 6d 65 3d 32 30 31 36 2d 31 31 2d 32 34  stime=2016-11-24
   48 00000030  2b 30 38 3a 30 30 3a 30 30 26 69 73 6d 61 69 6e  +08:00:00&ismain
   64 00000040  3d 30 26 26 68 74 74 70 5f 75 73 65 72 5f 61 67  =0&&http_user_ag
   80 00000050  65 6e 74 3d 4d 6f 7a 69 6c 6c 61 2f 34 2e 30 20  ent=Mozilla/4.0 
   96 00000060  28 63 6f 6d 70 61 74 69 62 6c 65 3b 20 4d 53 49  (compatible; MSI
  112 00000070  45 20 37 2e 30 29 26 68 74 74 70 5f 72 65 6d 6f  E 7.0)&http_remo
  128 00000080  74 65 5f 61 64 64 72 3d 36 31 2e 32 32 31 2e 32  te_addr=61.221.2
  144 00000090  32 35 2e 33 37 26 68 74 74 70 5f 72 65 6d 6f 74  25.37&http_remot
  160 000000a0  65 5f 70 6f 72 74 3d 33 34 37 32 37 26 68 74 74  e_port=34727&htt
  176 000000b0  70 5f 61 75 74 68 65 6e 74 3d 42 61 73 69 63 20  p_authent=Basic 
  192 000000c0  59 57 52 74 61 57 34 36 59 57 52 74 61 57 34 3d  YWRtaW46YWRtaW4=
  208 000000d0  00                                               .
--------------  -----------------------------------------------  ----------------