EasyRTMP实现RTMP异步直播推送之环形缓冲区设计
本文转自EasyDarwin团队kim的博客：http://blog.csdn.net/jinlong0603
EasyRTMP的推送缓冲区设计
EasyRTMP内部也同样采用的环形缓冲的设计方法，将音视频数据都同时存入缓冲区，再由发送者从缓冲区中获取数据进行发送，这样就形成了一个异步、生产者、消费者的过程，上层调用者只需要将采集、编码后的音视频Frame数据Push到SDK的缓冲区中，即可返回继续进行上层逻辑操作，SDK内部的发送线程则从缓冲区中不断获取音视频数据推送到流媒体服务器；
EasyRTMP缓冲区
缓冲区丢帧策略
有缓冲区，势必会出现缓冲区满的情况，当这个时候，就需要合理的丢帧策略了，我们这里采用的非关键帧丢帧策略跟《EasyDarwin开源流媒体服务器低延时直播之转发缓存跟进算法》博客中的原理是一致的，当缓冲区新增一帧进入缓冲区时，此时缓冲区已经满了，那么我们就要从缓冲区的读指针部分开始丢弃非关键帧P帧，直到遇到I帧就停止丢帧，再将新来的数据帧增加进入缓冲区，这样既可以保证一个较合理的直播推送缓冲区，确保推送延时可控，又能够保证不会出现花屏的问题；
EasyRTMP推送缓冲区实现
int SSQ_Init(SS_QUEUE_OBJ_T *pObj, unsigned int sharememory, unsigned int channelid, wchar_t *sharename, unsigned int bufsize, unsigned int prerecordsecs, unsigned int createsharememory)
{
wchar_t wszHeaderName[36] = {0,};
wchar_t wszFramelistName[36] = {0,};
wchar_t wszDataName[36] = {0,};
if (NULL==pObj) return -1;
if (createsharememory==0x01 && bufsize<1) return -1;
if ( (sharememory==0x01) && (NULL==sharename || (0==wcscmp(sharename, TEXT("\0")))) ) return -1;
memset(pObj, 0x00, sizeof(SS_QUEUE_OBJ_T));
pObj->channelid = channelid;
pObj->shareinfo.id = channelid;
wcscpy(pObj->shareinfo.name, sharename);
wchar_t wszMutexName[36] = {0,};
wsprintf(wszMutexName, TEXT("%s%d_mutex"), sharename, channelid);
pObj->hMutex = OpenMutex(NULL, FALSE, wszMutexName);
if (NULL == pObj->hMutex)
{
pObj->hMutex = CreateMutex(NULL, FALSE, wszMutexName);
if (NULL == pObj->hMutex) return -1;
}
//Create Header map
#ifdef _WIN32
if (sharememory == 0x01)
{
wsprintf(wszHeaderName, TEXT("%s%d_h"), sharename, channelid);
pObj->hSSHeader = OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, wszHeaderName);
if (NULL==pObj->hSSHeader && createsharememory==0x01)
{
pObj->hSSHeader = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE|SEC_COMMIT, 0, sizeof(SS_HEADER_T), wszHeaderName);
if (NULL==pObj->hSSHeader || pObj->hSSHeader==INVALID_HANDLE_VALUE)
{
return -1;
}
}
pObj->pQueHeader = (SS_HEADER_T*)MapViewOfFile(pObj->hSSHeader, FILE_MAP_READ|FILE_MAP_WRITE, 0, 0, 0);
if (createsharememory==0x01)
{
if (pObj->pQueHeader->bufsize < 1)
{
memset(pObj->pQueHeader, 0x00, sizeof(SS_HEADER_T));
pObj->pQueHeader->bufsize = bufsize;
}
}
else if (NULL==pObj->pQueHeader)
{
return -1;
}
else
{
bufsize = pObj->pQueHeader->bufsize;
}
}
else
{
pObj->pQueHeader = new SS_HEADER_T;
memset(pObj->pQueHeader, 0x00, sizeof(SS_HEADER_T));
}
//==========================================
//Create frame list map
if (prerecordsecs > 0)
{
wsprintf(wszFramelistName, TEXT("%s%d_f"), sharename, channelid);
unsigned int nFramelistNum = prerecordsecs * 30; //每秒30帧
unsigned int nFrameQueSize = nFramelistNum*sizeof(FRAMEINFO_LIST_T);
if (sharememory == 0x01)
{
pObj->hSSFrameList = OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, wszFramelistName);
if (NULL==pObj->hSSFrameList && createsharememory==0x01)
{
pObj->hSSFrameList = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE|SEC_COMMIT, 0, nFrameQueSize, wszFramelistName);
if (NULL==pObj->hSSFrameList || pObj->hSSFrameList==INVALID_HANDLE_VALUE)
{
return -1;
}
}
pObj->pFrameinfoList = (FRAMEINFO_LIST_T*)MapViewOfFile(pObj->hSSFrameList, FILE_MAP_READ|FILE_MAP_WRITE, 0, 0, 0);
if (createsharememory==0x01)
{
memset(pObj->pFrameinfoList, 0x00, nFrameQueSize);
pObj->pQueHeader->framelistNum = nFramelistNum;
}
else if (NULL==pObj->hSSFrameList)
{
return -1;
}
}
else
{
pObj->pFrameinfoList = new FRAMEINFO_LIST_T[nFramelistNum];
memset(&pObj->pFrameinfoList[0], 0x00, sizeof(FRAMEINFO_LIST_T)*nFramelistNum);
pObj->pQueHeader->framelistNum = nFramelistNum;
}
}
//Create data map
if (sharememory == 0x01)
{
wsprintf(wszDataName, TEXT("%s%d_b"), sharename, channelid);
pObj->hSSData = OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, wszDataName);
if (NULL==pObj->hSSData && createsharememory==0x01)
{
pObj->hSSData = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE|SEC_COMMIT, 0, bufsize, wszDataName);
}
if (NULL == pObj->hSSData || pObj->hSSData==INVALID_HANDLE_VALUE)
{
return -1;
}
pObj->pQueData = (char*)MapViewOfFile(pObj->hSSData, FILE_MAP_READ|FILE_MAP_WRITE, 0, 0, 0);
}
else
{
pObj->pQueData = new char [bufsize];
pObj->pQueHeader->bufsize = bufsize;
}
if (createsharememory==0x01)
{
//memset(pQueHeader, 0x00, sizeof(SS_HEADER_T));
memset(pObj->pQueData, 0x00, bufsize);
}
#else
int ret = shm_create((SYNC_VID_SHM_KEY<<8)|channelid, &pObj->shmHdrid, sizeof(SS_HEADER_T), (char**)&pObj->pQueHeader);
if (ret < 0)
{
return -1;
}
SSQ_TRACE("[%d]pQueHeader: %d\n", (SYNC_VID_SHM_KEY<<8)|channelid, pObj->shmHdrid);
ret = shm_create((SYNC_VID_SHM_KEY<<16)|channelid, &pObj->shmDatid, bufsize, (char**)&pObj->pQueData);
if (ret < 0)
{
shm_delete(&pObj->shmHdrid, (char*)pObj->pQueHeader);
return -1;
}
pObj->pQueHeader->bufsize = bufsize;
SSQ_TRACE("[%d]pQueData: %d\n", (SYNC_VID_SHM_KEY<<16)|channelid, pObj->shmDatid);
#endif
return 0;
}
int SSQ_Deinit(SS_QUEUE_OBJ_T *pObj)
{
if (NULL == pObj) return -1;
#ifdef _WIN32
if (NULL != pObj->hMutex)
{
CloseHandle(pObj->hMutex);
pObj->hMutex = NULL;
}
if (NULL != pObj->hSSHeader)
{
if (! UnmapViewOfFile(pObj->pQueHeader))
{
}
pObj->pQueHeader = NULL;
CloseHandle(pObj->hSSHeader);
pObj->hSSHeader = NULL;
}
if (NULL != pObj->pQueHeader)
{
delete []pObj->pQueHeader;
pObj->pQueHeader = NULL;
}
if (NULL != pObj->hSSData)
{
if (! UnmapViewOfFile(pObj->pQueData))
{
}
pObj->pQueData = NULL;
CloseHandle(pObj->hSSData);
pObj->hSSData = NULL;
}
if (NULL != pObj->pQueData)
{
delete []pObj->pQueData;
pObj->pQueData = NULL;
}
if (NULL != pObj->hSSFrameList)
{
if (! UnmapViewOfFile(pObj->pFrameinfoList))
{
}
pObj->pFrameinfoList = NULL;
CloseHandle(pObj->hSSFrameList);
pObj->hSSFrameList = NULL;
}
if (NULL != pObj->pFrameinfoList)
{
delete []pObj->pFrameinfoList;
pObj->pFrameinfoList = NULL;
}
#else
if (pObj->shmHdrid>0 && pObj->pQueHeader!=NULL)
{
shm_delete(&pObj->shmHdrid, (char*)pObj->pQueHeader);
}
if (pObj->shmDatid>0 && pObj->pQueData!=NULL)
{
shm_delete(&pObj->shmDatid, (char*)pObj->pQueData);
pObj->pQueData = NULL;
}
#endif
return 0;
}
int SSQ_SetClearFlag(SS_QUEUE_OBJ_T *pObj, unsigned int _flag)
{
if (NULL == pObj) return -1;
if (NULL==pObj->pQueData) return -1;
pObj->pQueHeader->clear_flag = _flag;
return 0;
}
int SSQ_Clear(SS_QUEUE_OBJ_T *pObj)
{
if (NULL == pObj) return -1;
if (NULL==pObj->pQueData) return -1;
//WaitForSingleObject(pObj->hMutex, INFINITE);
//Lock();
pObj->pQueHeader->writepos = 0;
pObj->pQueHeader->readpos = 0;
pObj->pQueHeader->totalsize= 0;
pObj->pQueHeader->videoframes = 0; //视频帧数
pObj->pQueHeader->maxframeno = 0;
pObj->pQueHeader->frameno = 0;
memset(pObj->pQueData, 0x00, pObj->pQueHeader->bufsize);
//ReleaseMutex(pObj->hMutex);
//Unlock();
return 0;
}
int SSQ_AddFrameInfo(SS_QUEUE_OBJ_T *pObj, unsigned int _pos, MEDIA_FRAME_INFO *frameinfo)
{
if (NULL == pObj) return -1;
if (NULL == pObj->pQueHeader) return -1;
if (NULL == pObj->pFrameinfoList) return -1;
if ( pObj->pQueHeader->frameno+1 > pObj->pQueHeader->framelistNum)
{
memmove((char*)pObj->pFrameinfoList, (char*)pObj->pFrameinfoList+sizeof(FRAMEINFO_LIST_T), sizeof(FRAMEINFO_LIST_T)*pObj->pQueHeader->framelistNum-1);
pObj->pQueHeader->frameno --;
pObj->pQueHeader->maxframeno = pObj->pQueHeader->frameno+1;
}
pObj->pFrameinfoList[pObj->pQueHeader->frameno].pos = pObj->pQueHeader->writepos;
#ifdef _DEBUG1
static int nTimestamp = 0;
pObj->pQueHeader->pFrameinfoList[pObj->pQueHeader->frameno].timestamp = ++nTimestamp;
#else
pObj->pFrameinfoList[pObj->pQueHeader->frameno].timestamp_sec = frameinfo->timestamp_sec;
pObj->pFrameinfoList[pObj->pQueHeader->frameno].rtp_timestamp = frameinfo->timestamp_sec*1000+frameinfo->timestamp_usec/1000;
#endif
//SSQ_TRACE("帧号: %d\n", pObj->pQueHeader->frameno);
pObj->pQueHeader->frameno ++;
pObj->pQueHeader->maxframeno = pObj->pQueHeader->frameno;
/*
if ( pObj->pQueHeader->frameno >= pObj->pQueHeader->framelistNum)
{
SSQ_TRACE("max frame: %d\n", pObj->pQueHeader->maxframeno);
pObj->pQueHeader->frameno = 0;
}
if (pObj->pQueHeader->frameno > pObj->pQueHeader->maxframeno)
{
pObj->pQueHeader->maxframeno = pObj->pQueHeader->frameno;
}
*/
return 0;
}
int SSQ_AddData(SS_QUEUE_OBJ_T *pObj, unsigned int channelid, unsigned int mediatype, MEDIA_FRAME_INFO *frameinfo, char *pbuf)
{
int ret = 0;
SS_BUF_T bufNode;
if (NULL==pObj || NULL==frameinfo || NULL==pbuf) return -1;
if (NULL == pObj->pQueData) return -1;
if (NULL == pObj->pQueHeader) return -1;
if (frameinfo->length < 1)
{
#ifdef _DEBUG
SSQ_TRACE("frame length < 1: %d\n", frameinfo->length);
#endif
return -1;
}
#ifdef _DEBUG1
SSQ_TRACE("frame: %02x%02x%02x%02x%02x\n", (unsigned char)pbuf[0],
(unsigned char)pbuf[1],
(unsigned char)pbuf[2],
(unsigned char)pbuf[3],
(unsigned char)pbuf[4]);
#endif
if (frameinfo->length > pObj->pQueHeader->bufsize)
{
SSQ_TRACE("Buffer too low.. Current Frame Size: %d\tBuffer Size: %d\n", frameinfo->length, pObj->pQueHeader->bufsize);
return -1;
}
WaitForSingleObject(pObj->hMutex, INFINITE); //Lock
if (pObj->pQueHeader->clear_flag == 0x01)
{
//SSQ_TRACE("Received clear signal... Clear Buffer..\n");
SSQ_TRACE("clear cache.. WritePos: %d\n", pObj->pQueHeader->writepos);
SSQ_Clear(pObj);
pObj->pQueHeader->clear_flag = 0x00;
}
if (pObj->pQueHeader->writepos == pObj->pQueHeader->readpos)
{
if (pObj->pQueHeader->totalsize < 0 || pObj->pQueHeader->videoframes < 0)
{
SSQ_TRACE("write speed==read speed... data length exception: %d video frames:%d\n", pObj->pQueHeader->totalsize, pObj->pQueHeader->videoframes);
}
//Clear();
}
if (sizeof(SS_BUF_T) + frameinfo->length + pObj->pQueHeader->totalsize > pObj->pQueHeader->bufsize)
{
SSQ_TRACE("beyond ssqueue length.. len:%d\ttotalsize:%d\tbufsize:%d cache frames:%d\n", frameinfo->length, pObj->pQueHeader->totalsize, pObj->pQueHeader->bufsize, pObj->pQueHeader->videoframes);
ReleaseMutex(pObj->hMutex);
pObj->pQueHeader->isfull = 0x01;
return -1;
}
pObj->pQueHeader->isfull = 0x00;
memset(&bufNode, 0x00, sizeof(SS_BUF_T));
memcpy(&bufNode.frameinfo, frameinfo, sizeof(MEDIA_FRAME_INFO));
bufNode.channelid = channelid;//++m_FrameTally;
bufNode.mediatype = mediatype;
bufNode.flag = BUF_QUE_FLAG;
//_TRACE("WritePos: %d totalSize: %d\n", pQueHeader->writepos, pQueHeader->totalsize);
//Lock();
if ((pObj->pQueHeader->writepos + sizeof(SS_BUF_T) + frameinfo->length) <= pObj->pQueHeader->bufsize)
{
//copy to queue
if (mediatype==MEDIA_TYPE_VIDEO) SSQ_AddFrameInfo(pObj, pObj->pQueHeader->writepos, frameinfo);
unsigned int nAdd = pObj->pQueHeader->writepos;
memcpy(pObj->pQueData+nAdd, &bufNode, sizeof(SS_BUF_T));
nAdd += sizeof(SS_BUF_T);
memcpy(pObj->pQueData+nAdd, pbuf, frameinfo->length);
nAdd += frameinfo->length;
pObj->pQueHeader->writepos = nAdd;
pObj->pQueHeader->totalsize+= sizeof(SS_BUF_T);
pObj->pQueHeader->totalsize+= frameinfo->length;
if (mediatype==MEDIA_TYPE_VIDEO) pObj->pQueHeader->videoframes ++;
//_TRACE("顺序新增.. writepos: %d / %d\n", pQueHeader->writepos, pQueHeader->size);
}
else if (pObj->pQueHeader->writepos == pObj->pQueHeader->bufsize) //从头开始
{
//记录帧位置
if (mediatype==MEDIA_TYPE_VIDEO) SSQ_AddFrameInfo(pObj, 0, frameinfo);
memcpy(pObj->pQueData, &bufNode, sizeof(SS_BUF_T));
pObj->pQueHeader->writepos = sizeof(SS_BUF_T);
memcpy(pObj->pQueData+pObj->pQueHeader->writepos, pbuf, frameinfo->length);
pObj->pQueHeader->writepos += frameinfo->length;
pObj->pQueHeader->totalsize= sizeof(SS_BUF_T);
pObj->pQueHeader->totalsize+= frameinfo->length;
if (mediatype==MEDIA_TYPE_VIDEO) pObj->pQueHeader->videoframes ++;
SSQ_TRACE("从头开始写.. writepos: %d\n", pObj->pQueHeader->writepos);
}
//else if (pQueHeader->size - pQueHeader->writepos+pQueHeader->readpos >= (int)(frameinfo->length+sizeof(SS_BUF_T))) //从尾写到头
//else if (pObj->pQueHeader->bufsize - pObj->pQueHeader->writepos+pObj->pQueHeader->readpos >= (int)(frameinfo->length+sizeof(SS_BUF_T))) //从尾写到头
else// if (pObj->pQueHeader->bufsize - pObj->pQueHeader->writepos >= (int)(frameinfo->length+sizeof(SS_BUF_T))) //从尾写到头
{
unsigned int remain = pObj->pQueHeader->bufsize - pObj->pQueHeader->writepos; //剩余空间
if (remain>=sizeof(SS_BUF_T))
{
unsigned int nAdd = pObj->pQueHeader->writepos;
//记录帧位置
if (mediatype==MEDIA_TYPE_VIDEO) SSQ_AddFrameInfo(pObj, nAdd, frameinfo);
//_TRACE("WritePos111: %d\n", pQueHeader->writepos);
memcpy(pObj->pQueData+nAdd, &bufNode, sizeof(SS_BUF_T));
nAdd += sizeof(SS_BUF_T);
//pQueHeader->totalsize+= sizeof(SS_BUF_T);
//_TRACE("WritePos222: %d\n", pQueHeader->writepos+sizeof(SS_BUF_T));
remain = pObj->pQueHeader->bufsize - nAdd;//pQueHeader->writepos;
//_TRACE("WritePos: %d\n", pQueHeader->writepos+sizeof(SS_BUF_T)+remain);
if (remain>0)
{
memcpy(pObj->pQueData+nAdd, pbuf, remain);
memcpy(pObj->pQueData, pbuf+remain, frameinfo->length-remain);
nAdd = frameinfo->length-remain;
pObj->pQueHeader->writepos = nAdd;
pObj->pQueHeader->totalsize+= sizeof(SS_BUF_T);
pObj->pQueHeader->totalsize+= frameinfo->length;
if (pObj->pQueHeader->totalsize>pObj->pQueHeader->bufsize)
{
//原因: rtsp server已停止读该队列(当前没有客户端访问)
SSQ_TRACE("[RTSP Server已停止读取该队列]错误 %d > %d frameinfo->length:%d...\n", pObj->pQueHeader->totalsize, pObj->pQueHeader->bufsize, frameinfo->length);
//SSQ_Clear(pObj);
}
else
{
if (mediatype==MEDIA_TYPE_VIDEO) pObj->pQueHeader->videoframes ++;
//SSQ_TRACE("111Header及部分帧数据位于缓存尾, 部分帧数据位于缓存首.. remain: %d writepos: %d totalsize: %d\n", remain, pObj->pQueHeader->writepos, pObj->pQueHeader->totalsize);
}
}
else if (remain==0)
{
memcpy(pObj->pQueData, pbuf, frameinfo->length);
nAdd = frameinfo->length;
pObj->pQueHeader->writepos = nAdd;
pObj->pQueHeader->totalsize+= sizeof(SS_BUF_T);
pObj->pQueHeader->totalsize+= frameinfo->length;
if (mediatype==MEDIA_TYPE_VIDEO) pObj->pQueHeader->videoframes ++;
if (pObj->pQueHeader->totalsize>pObj->pQueHeader->bufsize)
{
SSQ_TRACE("错误222 %d > %d frameinfo->length:%d...\n", pObj->pQueHeader->totalsize, pObj->pQueHeader->bufsize, frameinfo->length);
//SSQ_Clear(pObj);
}
else
{
SSQ_TRACE("22222Header位于缓存尾,帧数据位于缓存首.. writepos: %d\n", pObj->pQueHeader->writepos);
}
}
else
{
SSQ_TRACE("错误... 剩余空间小于0: %d\n", remain);
ret = -1;
}
}
else if (remain>0)
{
char *tmpbuf = (char *)&bufNode;
unsigned int nAdd = pObj->pQueHeader->writepos;
//记录帧位置
if (mediatype==MEDIA_TYPE_VIDEO) SSQ_AddFrameInfo(pObj, nAdd, frameinfo);
//SSQ_TRACE("ADD DATA...%d\n", nAdd);
memcpy(pObj->pQueData+nAdd, tmpbuf, remain);
//SSQ_TRACE("ADD DATA222...%d\n", sizeof(SS_BUF_T)-remain);
memcpy(pObj->pQueData, tmpbuf+remain, sizeof(SS_BUF_T)-remain);
nAdd = sizeof(SS_BUF_T)-remain;
memcpy(pObj->pQueData+nAdd, pbuf, frameinfo->length);
nAdd += frameinfo->length;
pObj->pQueHeader->writepos = nAdd;
pObj->pQueHeader->totalsize+= sizeof(SS_BUF_T);
pObj->pQueHeader->totalsize+= frameinfo->length;
if (pObj->pQueHeader->totalsize>pObj->pQueHeader->bufsize)
{
SSQ_TRACE("错误333 %d > %d frameinfo->length:%d...\n", pObj->pQueHeader->totalsize, pObj->pQueHeader->bufsize, frameinfo->length);
//SSQ_Clear(pObj);
}
if (mediatype==MEDIA_TYPE_VIDEO) pObj->pQueHeader->videoframes ++;
}
else
{
ret = -1;
SSQ_TRACE("ERROR...\n");
}
}
//else
{
//else if (pObj->pQueHeader->bufsize - pObj->pQueHeader->writepos+pObj->pQueHeader->readpos >= (int)(frameinfo->length+sizeof(SS_BUF_T))) //从尾写到头
//SSQ_TRACE("写尾错误.. 未处理. 写位置:%d / pObj->pQueHeader->bufsize 读位置:%d\n", pObj->pQueHeader->writepos, pObj->pQueHeader->bufsize, pObj->pQueHeader->readpos);
}
//Unlock();
ReleaseMutex(pObj->hMutex);
//SSQ_TRACE("writepos: %d\ttotalsize: %d\n", pObj->pQueHeader->writepos, pObj->pQueHeader->totalsize);
#ifdef _DEBUG1
if (mediatype==MEDIA_TYPE_VIDEO)
{
SSQ_TRACE("==========================\n");
for (int i=0; i<pObj->pQueHeader->maxframeno; i++)
{
SSQ_TRACE("[%d] times: %d pos: %d %02X%02X%02X%02X%02X\n", i, pObj->pQueHeader->pFrameinfoList[i].timestamp, pObj->pQueHeader->pFrameinfoList[i].pos,
(unsigned char)pObj->pQueData[pObj->pQueHeader->pFrameinfoList[i].pos+sizeof(SS_BUF_T)+0], (unsigned char)pObj->pQueData[pObj->pQueHeader->pFrameinfoList[i].pos+sizeof(SS_BUF_T)+1], (unsigned char)pObj->pQueData[pObj->pQueHeader->pFrameinfoList[i].pos+sizeof(SS_BUF_T)+2],
(unsigned char)pObj->pQueData[pObj->pQueHeader->pFrameinfoList[i].pos+sizeof(SS_BUF_T)+3], (unsigned char)pObj->pQueData[pObj->pQueHeader->pFrameinfoList[i].pos+sizeof(SS_BUF_T)+4]);
}
}
#endif
return ret;
}
int SSQ_GetData(SS_QUEUE_OBJ_T *pObj, unsigned int *channelid, unsigned int *mediatype, MEDIA_FRAME_INFO *frameinfo, char *pbuf)
{
int ret = 0;
unsigned int remain = 0;
if (NULL == pObj) return -1;
if (NULL == pObj->pQueHeader) return -1;
if (NULL == pObj->pFrameinfoList) return -1;
WaitForSingleObject(pObj->hMutex, INFINITE); //Lock
if (pObj->pQueHeader->totalsize < 0)
{
SSQ_TRACE("pObj->pQueHeader->totalsize<0: %d\n", pObj->pQueHeader->totalsize);
ReleaseMutex(pObj->hMutex);
return -1;
}
if (pObj->pQueHeader->totalsize <= sizeof(SS_BUF_T))
{
ReleaseMutex(pObj->hMutex);
return -1;
}
//_TRACE("读位置: %d\n", pQueHeader->readpos);
//if (NULL != chid) *chid = m_chid;
//Lock();
#if 0
ret = -1;
for (unsigned int i=0; i<pObj->pQueHeader->maxframeno; i++)
{
if (pObj->pFrameinfoList[i].rtp_timestamp > frameinfo->rtptimestamp)
{
pObj->pQueHeader->readpos = pObj->pFrameinfoList[i].pos;
ret = SSQ_GetDataByPosition(pObj, pObj->pFrameinfoList[i].pos, channelid, mediatype, frameinfo, pbuf);
break;
}
}
#else
if (pObj->pQueHeader->readpos == pObj->pQueHeader->bufsize)
{
SSQ_TRACE("重置读位置[%d / %d]..\n", pObj->pQueHeader->readpos, pObj->pQueHeader->bufsize);
pObj->pQueHeader->readpos = 0;
}
if ((pObj->pQueHeader->readpos + sizeof(SS_BUF_T)) <= pObj->pQueHeader->bufsize)
{
SS_BUF_T *pNode = (SS_BUF_T *)(pObj->pQueData + pObj->pQueHeader->readpos);
//if (pNode->id<1)
if (pNode->flag != BUF_QUE_FLAG)
{
SSQ_TRACE("标志位错误... 缓存视频帧:%d 字节数:%d 清空队列\n", pObj->pQueHeader->videoframes, pObj->pQueHeader->totalsize);
if (pObj->hSSHeader == NULL) //同一个进程内使用
{
SSQ_Clear(pObj);
}
else
{
pObj->pQueHeader->clear_flag = 0x01;
#ifdef _WIN32
while (pObj->pQueHeader->clear_flag!=0x00) {Sleep(1);}
#else
while (pObj->pQueHeader->clear_flag!=0x00) {usleep(100);}
#endif
}
//Unlock();
SSQ_TRACE("111标志位错误... 缓存视频帧:%d 字节数:%d\n", pObj->pQueHeader->videoframes, pObj->pQueHeader->totalsize);
SSQ_TRACE("标志位错误.. 清空队列.. readpos: %d\n", pObj->pQueHeader->readpos);
//pObj->pQueHeader->clear_flag = 0x01;
//_TRACE("标志位错误.. 清空队列完成..\n");
ReleaseMutex(pObj->hMutex);
return -1;
}
if (NULL!=mediatype) *mediatype = pNode->mediatype;
if (NULL != channelid) *channelid = pNode->channelid;
memcpy(frameinfo, &pNode->frameinfo, sizeof(MEDIA_FRAME_INFO));
if ( (pObj->pQueHeader->readpos + pNode->frameinfo.length+sizeof(SS_BUF_T)) <= pObj->pQueHeader->bufsize)
{
//从头到尾读
if (pObj->pQueHeader->totalsize < frameinfo->length+sizeof(SS_BUF_T))
{
//数据量不够
SSQ_TRACE("数据量不够... 总字节数[%d]<帧长[%d]. 读位置:%d\n", pObj->pQueHeader->totalsize, frameinfo->length+sizeof(SS_BUF_T), pObj->pQueHeader->readpos);
ReleaseMutex(pObj->hMutex);
return -1;
}
if (frameinfo->length+sizeof(SS_BUF_T) > pObj->pQueHeader->totalsize)
{
SSQ_TRACE("总字节数[%d]<帧长[%d]. 读位置:%d\n", pObj->pQueHeader->totalsize, frameinfo->length+sizeof(SS_BUF_T), pObj->pQueHeader->readpos);
}
//_TRACE("读位置00000000...: %d / %d\n", pQueHeader->readpos, pQueHeader->size);
pObj->pQueHeader->readpos += sizeof(SS_BUF_T);
unsigned int total1 = pObj->pQueHeader->totalsize;
pObj->pQueHeader->totalsize -= sizeof(SS_BUF_T);
if (NULL!=pbuf) memcpy(pbuf, pObj->pQueData+pObj->pQueHeader->readpos, frameinfo->length);
//memset(pObj->pQueData+pObj->pQueHeader->readpos, 0x00, frameinfo->length); //clear
pObj->pQueHeader->readpos += frameinfo->length;
unsigned int total2 = pObj->pQueHeader->totalsize;
pObj->pQueHeader->totalsize -= (frameinfo->length);
if (pObj->pQueHeader->readpos == pObj->pQueHeader->bufsize)
{
pObj->pQueHeader->readpos = 0;
}
if (pObj->pQueHeader->readpos > pObj->pQueHeader->bufsize)
{
SSQ_TRACE("读位置错误11111...: %d / %d\n", pObj->pQueHeader->readpos, pObj->pQueHeader->bufsize);
}
if (pObj->pQueHeader->totalsize < 0)
{
SSQ_TRACE("读位置: %d\t写位置: %d 当前帧大小:%d total1:%d\ttotal2:%d\ttotal3:%d\n", pObj->pQueHeader->readpos, pObj->pQueHeader->writepos, frameinfo->length, total1, total2, pObj->pQueHeader->totalsize);
SSQ_TRACE("总字节数错误: %d\n", pObj->pQueHeader->totalsize);
}
}
else
{
if (pObj->pQueHeader->totalsize < (pNode->frameinfo.length+sizeof(SS_BUF_T)))
{
SSQ_TRACE("总字节数<帧长+sizeof(SS_BUF_T)..\n");
//Unlock();
ReleaseMutex(pObj->hMutex);
return -1;
}
remain = pObj->pQueHeader->bufsize-pObj->pQueHeader->readpos;
if (remain>=sizeof(SS_BUF_T))
{
pObj->pQueHeader->readpos += sizeof(SS_BUF_T);
remain = pObj->pQueHeader->bufsize - pObj->pQueHeader->readpos;
if (remain>0)
{
//SSQ_TRACE("111尾有部分数据... 首有部分数据... remain>0: %d\n", remain);
if (NULL!=pbuf) memcpy(pbuf, pObj->pQueData+pObj->pQueHeader->readpos, remain);
//memset(pObj->pQueData+pObj->pQueHeader->readpos, 0x00, remain); //clear
if (NULL!=pbuf) memcpy(pbuf+remain, pObj->pQueData, frameinfo->length-remain);
//memset(pObj->pQueData, 0x00, frameinfo->length-remain); //clear
pObj->pQueHeader->readpos = frameinfo->length-remain;
pObj->pQueHeader->totalsize -= frameinfo->length;
pObj->pQueHeader->totalsize -= sizeof(SS_BUF_T);
if (pObj->pQueHeader->totalsize < 0)
{
SSQ_TRACE("3333pObj->pQueHeader->totalsize<0: %d\n", pObj->pQueHeader->totalsize);
}
}
else
{
if (remain < 0)
{
SSQ_TRACE("位移错误: 剩余字节数<0:%d\n", remain);
}
else
{
SSQ_TRACE("111尾有部分数据... 首有部分数据... remain<=0: %d\n", remain);
if (NULL!=pbuf) memcpy(pbuf, pObj->pQueData, frameinfo->length);
//memset(pObj->pQueData, 0x00, frameinfo->length-remain); //clear
pObj->pQueHeader->readpos = frameinfo->length;
pObj->pQueHeader->totalsize -= frameinfo->length;
pObj->pQueHeader->totalsize -= sizeof(SS_BUF_T);
if (pObj->pQueHeader->totalsize < 0)
{
SSQ_TRACE("4444pObj->pQueHeader->totalsize<0: %d\n", pObj->pQueHeader->totalsize);
}
}
}
//SSQ_TRACE("remain > sizeof(SS_BUF_T): %d\t\treadpos: %d\n", remain, pObj->pQueHeader->readpos);
}
else
{
//SSQ_TRACE("remain < sizeof(SS_BUF_T): %d\n", remain);
//执行到此处,说明异常
//remain = pObj->pQueHeader->bufsize - pObj->pQueHeader->readpos;
if (remain>0)
{
SSQ_TRACE("222尾有部分数据... 首有部分数据... remain>0: %d\n", remain);
if (NULL!=pbuf) memcpy(pbuf, pObj->pQueData+pObj->pQueHeader->readpos, remain);
//memset(pObj->pQueData+pObj->pQueHeader->readpos, 0x00, remain); //clear
if (NULL!=pbuf) memcpy(pbuf+remain, pObj->pQueData, frameinfo->length-remain);
//memset(pObj->pQueData, 0x00, frameinfo->length-remain); //clear
pObj->pQueHeader->readpos = frameinfo->length-remain;
pObj->pQueHeader->totalsize -= frameinfo->length;
if (pObj->pQueHeader->totalsize < 0)
{
SSQ_TRACE("555pObj->pQueHeader->totalsize<0: %d\n", pObj->pQueHeader->totalsize);
}
}
else
{
SSQ_TRACE("222尾有部分数据... 首有部分数据... remain<=0: %d\n", remain);
if (NULL!=pbuf) memcpy(pbuf, pObj->pQueData, frameinfo->length);
//memset(pObj->pQueData, 0x00, frameinfo->length-remain); //clear
pObj->pQueHeader->readpos = frameinfo->length;
pObj->pQueHeader->totalsize -= frameinfo->length;
if (pObj->pQueHeader->totalsize < 0)
{
SSQ_TRACE("666pObj->pQueHeader->totalsize<0: %d\n", pObj->pQueHeader->totalsize);
}
}
pObj->pQueHeader->totalsize -= sizeof(SS_BUF_T);
if (pObj->pQueHeader->totalsize < 0)
{
SSQ_TRACE("777pObj->pQueHeader->totalsize<0: %d\n", pObj->pQueHeader->totalsize);
}
}
//pObj->pQueHeader->readpos += sizeof(SS_BUF_T);
//pObj->pQueHeader->totalsize -= sizeof(SS_BUF_T);
if (pObj->pQueHeader->readpos>pObj->pQueHeader->bufsize)
{
SSQ_TRACE("读位置错误...: %d / %d\n", pObj->pQueHeader->readpos, pObj->pQueHeader->bufsize);
}
/*
if (NULL!=pbuf) memcpy(pbuf, pShareMemoryBuff+pQueHeader->readpos, remain);
memset(pShareMemoryBuff+pQueHeader->readpos, 0x00, remain); //clear
if (NULL!=pbuf) memcpy(pbuf+remain, pShareMemoryBuff, frameinfo->length-remain);
memset(pShareMemoryBuff, 0x00, frameinfo->length-remain); //clear
pQueHeader->readpos = frameinfo->length-remain;
pQueHeader->totalsize -= (frameinfo->length-remain);
*/
}
if (MEDIA_TYPE_VIDEO==pNode->mediatype) pObj->pQueHeader->videoframes --;
//memset(pNode, 0x00, sizeof(SS_BUF_T));
}
else
{
unsigned int remain = pObj->pQueHeader->bufsize-pObj->pQueHeader->readpos;
SS_BUF_T bufnode;
char *pp = (char *)&bufnode;
memset(&bufnode, 0x00, sizeof(SS_BUF_T));
//SSQ_TRACE("GET DATA...\n");
//SSQ_TRACE("1 REMAIN: %d\n", remain);
if (remain>0)
{
memcpy(pp, pObj->pQueData+pObj->pQueHeader->readpos, remain);
//memset(pObj->pQueData+pObj->pQueHeader->readpos, 0x00, remain); //clear
//SSQ_TRACE("2 read: %d\n", sizeof(SS_BUF_T)-remain);
memcpy(pp+remain, pObj->pQueData, sizeof(SS_BUF_T)-remain);
//memset(pObj->pQueData, 0x00, sizeof(SS_BUF_T)-remain); //clear
memcpy(frameinfo, &bufnode.frameinfo, sizeof(MEDIA_FRAME_INFO));
if (NULL != channelid) *channelid = bufnode.channelid;
//if (bufnode.id<1)
if (bufnode.flag != BUF_QUE_FLAG)
{
//Unlock();
SSQ_Clear(pObj);
ReleaseMutex(pObj->hMutex);
SSQ_TRACE("SSQ_标志符错误...\n");
return -1;
}
pObj->pQueHeader->readpos = sizeof(SS_BUF_T)-remain;
if (NULL!=mediatype) *mediatype = bufnode.mediatype;
//SSQ_TRACE("3 frame length: %d\n", bufnode.frameinfo.length);
if (NULL!=pbuf) memcpy(pbuf, pObj->pQueData+pObj->pQueHeader->readpos, bufnode.frameinfo.length);
//memset(pObj->pQueData+pObj->pQueHeader->readpos, 0x00, bufnode.frameinfo.length); //clear
pObj->pQueHeader->readpos += bufnode.frameinfo.length;
pObj->pQueHeader->totalsize -= sizeof(SS_BUF_T);
//pObj->pQueHeader->totalsize -= (frameinfo->length-remain);
pObj->pQueHeader->totalsize -= (frameinfo->length);//20140521
if (pObj->pQueHeader->totalsize < 0)
{
SSQ_TRACE("888pObj->pQueHeader->totalsize<0: %d\n", pObj->pQueHeader->totalsize);
}
//SSQ_TRACE("GET DATA OK..\n");
if (MEDIA_TYPE_VIDEO==bufnode.mediatype) pObj->pQueHeader->videoframes --;
}
else
{
SSQ_TRACE("异常... REMAIN <= 0....\n");
}
ret = 1000;
}
#endif
//Unlock();
ReleaseMutex(pObj->hMutex);
return ret;
}
//===========================================
//根据位置获取对应的帧数据
int SSQ_GetDataByPosition(SS_QUEUE_OBJ_T *pObj, unsigned int position, unsigned int clearflag, unsigned int *channelid, unsigned int *mediatype, MEDIA_FRAME_INFO *frameinfo, char *pbuf)
{
int ret = 0;
unsigned int remain = 0;
if (NULL == pObj) return -1;
if (NULL == pObj->pQueHeader) return -1;
if (NULL == pObj->pFrameinfoList) return -1;
unsigned int *pOffset = (unsigned int *)&position;
unsigned int totalsize = pObj->pQueHeader->totalsize;
unsigned int *pTotalSize = (unsigned int*)&totalsize;
if (clearflag == 0x01)
{
pOffset = (unsigned int*)&pObj->pQueHeader->readpos;
pTotalSize = (unsigned int*)&pObj->pQueHeader->totalsize;
}
WaitForSingleObject(pObj->hMutex, INFINITE); //Lock
if (*pOffset == pObj->pQueHeader->bufsize)
{
SSQ_TRACE("重置读位置[%d / %d]..\n", *pOffset, pObj->pQueHeader->bufsize);
*pOffset = 0;
}
if (clearflag==0x01)
{
if (pObj->pQueHeader->totalsize <= sizeof(SS_BUF_T))
{
ReleaseMutex(pObj->hMutex);
return -1;
}
if (pObj->pQueHeader->readpos == pObj->pQueHeader->bufsize)
{
pObj->pQueHeader->readpos = 0;
}
}
if ((*pOffset + sizeof(SS_BUF_T)) <= pObj->pQueHeader->bufsize)
{
SS_BUF_T *pNode = (SS_BUF_T *)(pObj->pQueData + *pOffset);
if (pNode->flag != BUF_QUE_FLAG)
{
SSQ_TRACE("[SSQ_GetDataByPosition]标志位错误...\n");
if (clearflag == 0x01)
{
if (pObj->hSSHeader==NULL) //同一进程
{
SSQ_Clear(pObj);
}
else
{
pObj->pQueHeader->clear_flag = 0x01;
while (pObj->pQueHeader->clear_flag!=0x00) {Sleep(1);}
}
}
ReleaseMutex(pObj->hMutex);
return -1;
}
if (NULL!=mediatype) *mediatype = pNode->mediatype;
if (NULL != channelid) *channelid = pNode->channelid;
memcpy(frameinfo, &pNode->frameinfo, sizeof(MEDIA_FRAME_INFO));
if ( (*pOffset + pNode->frameinfo.length+sizeof(SS_BUF_T)) <= pObj->pQueHeader->bufsize)
{
//从头到尾读
*pOffset += sizeof(SS_BUF_T);
if (NULL!=pbuf) memcpy(pbuf, pObj->pQueData+*pOffset, frameinfo->length);
*pOffset += frameinfo->length;
*pTotalSize -= (frameinfo->length+sizeof(SS_BUF_T));
if (*pOffset == pObj->pQueHeader->bufsize)
{
*pOffset = 0;
}
if (*pOffset > pObj->pQueHeader->bufsize)
{
SSQ_TRACE("[SSQ_GetDataByPosition]读位置错误11111...: %d / %d\n", *pOffset, pObj->pQueHeader->bufsize);
}
}
else
{
remain = pObj->pQueHeader->bufsize - *pOffset;
if (remain>=sizeof(SS_BUF_T))
{
*pOffset += sizeof(SS_BUF_T);
remain = pObj->pQueHeader->bufsize - *pOffset;
if (remain>0)
{
if (NULL!=pbuf) memcpy(pbuf, pObj->pQueData + *pOffset, remain);
if (NULL!=pbuf) memcpy(pbuf+remain, pObj->pQueData, frameinfo->length-remain);
*pOffset = frameinfo->length-remain;
*pTotalSize -= (frameinfo->length+sizeof(SS_BUF_T));
}
else
{
if (remain < 0)
{
SSQ_TRACE("[SSQ_GetDataByPosition]位移错误: 剩余字节数<0:%d\n", remain);
}
else
{
SSQ_TRACE("[SSQ_GetDataByPosition]尾有部分数据... 首有部分数据... remain<=0: %d\n", remain);
if (NULL!=pbuf) memcpy(pbuf, pObj->pQueData, frameinfo->length);
//memset(pObj->pQueData, 0x00, frameinfo->length-remain); //clear
*pOffset = frameinfo->length;
*pTotalSize -= (frameinfo->length+sizeof(SS_BUF_T));
}
}
}
else
{
//SSQ_TRACE("remain < sizeof(SS_BUF_T): %d\n", remain);
//执行到此处,说明异常
SSQ_TRACE("[SSQ_GetDataByPosition] 异常 #########... remain>0: %d\n", remain);
if (remain>0)
{
SSQ_TRACE("[SSQ_GetDataByPosition]222尾有部分数据... 首有部分数据... remain>0: %d\n", remain);
if (NULL!=pbuf) memcpy(pbuf, pObj->pQueData + *pOffset, remain);
if (NULL!=pbuf) memcpy(pbuf+remain, pObj->pQueData, frameinfo->length-remain);
*pOffset = frameinfo->length-remain;
*pTotalSize -= (frameinfo->length);
}
else
{
SSQ_TRACE("[SSQ_GetDataByPosition]222尾有部分数据... 首有部分数据... remain<=0: %d\n", remain);
if (NULL!=pbuf) memcpy(pbuf, pObj->pQueData, frameinfo->length);
//memset(pObj->pQueData, 0x00, frameinfo->length-remain); //clear
*pOffset = frameinfo->length;
}
}
if (*pOffset > pObj->pQueHeader->bufsize)
{
SSQ_TRACE("[SSQ_GetDataByPosition]读位置错误...: %d / %d\n", *pOffset, pObj->pQueHeader->bufsize);
}
}
if (MEDIA_TYPE_VIDEO==pNode->mediatype && clearflag==0x01) pObj->pQueHeader->videoframes --;
}
else
{
unsigned int remain = pObj->pQueHeader->bufsize - *pOffset;
SS_BUF_T bufnode;
char *pp = (char *)&bufnode;
memset(&bufnode, 0x00, sizeof(SS_BUF_T));
//SSQ_TRACE("GET DATA...\n");
SSQ_TRACE("[SSQ_GetDataByPosition]1 REMAIN: %d\n", remain);
if (remain>0)
{
memcpy(pp, pObj->pQueData + *pOffset, remain);
SSQ_TRACE("[SSQ_GetDataByPosition]2 read: %d\n", sizeof(SS_BUF_T)-remain);
memcpy(pp+remain, pObj->pQueData, sizeof(SS_BUF_T)-remain);
memcpy(frameinfo, &bufnode.frameinfo, sizeof(MEDIA_FRAME_INFO));
if (NULL != channelid) *channelid = bufnode.channelid;
if (bufnode.flag != BUF_QUE_FLAG)
{
//Unlock();
SSQ_Clear(pObj);
ReleaseMutex(pObj->hMutex);
SSQ_TRACE("[SSQ_GetDataByPosition]SSQ_标志符错误...\n");
return -1;
}
*pOffset = sizeof(SS_BUF_T)-remain;
if (NULL!=mediatype) *mediatype = bufnode.mediatype;
SSQ_TRACE("[SSQ_GetDataByPosition]3 frame length: %d\n", bufnode.frameinfo.length);
if (NULL!=pbuf) memcpy(pbuf, pObj->pQueData + *pOffset, bufnode.frameinfo.length);
*pOffset += bufnode.frameinfo.length;
*pTotalSize -= (frameinfo->length+sizeof(SS_BUF_T));
SSQ_TRACE("[SSQ_GetDataByPosition]GET DATA OK..\n");
if (MEDIA_TYPE_VIDEO==bufnode.mediatype && clearflag==0x01) pObj->pQueHeader->videoframes --;
}
else
{
SSQ_TRACE("[SSQ_GetDataByPosition]异常... REMAIN <= 0....\n");
}
ret = 1000;
}
//Unlock();
ReleaseMutex(pObj->hMutex);
return ret;
}
int SSQ_TRACE(char* szFormat, ...)
{
#ifdef _DEBUG
char buff[1024] = {0,};
wchar_t wszbuff[1024] = {0,};
va_list args;
va_start(args,szFormat);
_vsnprintf(buff, 1023, szFormat,args);
va_end(args);
MByteToWChar(buff, wszbuff, sizeof(wszbuff)/sizeof(wszbuff[0]));
#ifdef _WIN32
OutputDebugString(wszbuff);
#endif
printf("TRACE: %s", buff);
#endif
return 0;
}获取更多信息
Copyright © EasyDarwin.org 2012-2016
EasyRTMP实现RTMP异步直播推送之环形缓冲区设计的更多相关文章
- iOS直播-基于RTMP的视频推送
iOS直播-基于RTMP的视频推送 所谓的视频推送就是把摄像头和麦克风捕获到视频和音频推送到直播服务器上.我们这里使用推送协议是RTMP协议. 扩展:腾讯直播平台,阿里直播平台,百度直播平台提供均为R ...
- EasyPusher直播推送中用到的缓冲区设计和丢帧原理
问题描述 我们在开发直播过程中,会需要用到直播推送端,推送端将直播的音视频数据推送到流媒体服务器或者cdn,再由流媒体服务器/CDN进行视频的转发和分发,提供给客户端进行观看.由于直播推送端会存在于各 ...
- EasyPusher安卓Android手机直播推送之RTSP流媒体协议流程
EasyPusher移动端推送同我们平时用的RTSP直播推送流程一样,都是采用标准RTSP/RTP推送流程:ANNOUNCE->SETUP->PLAY->RTP/RTCP->T ...
- EasyDarwin开源手机直播方案：EasyPusher手机直播推送,EasyDarwin流媒体服务器,EasyPlayer手机播放器
在不断进行EasyDarwin开源流媒体服务器的功能和性能完善的同时,我们也配套实现了目前在安防和移动互联网行业比较火热的移动端手机直播方案,主要就是我们的 EasyPusher直播推送项目 和 Ea ...
- 基于EasyDarwin EasyPusher实现Android手机直播推送功能
EasyPusher直播推送在之前就已经稳定支持了Windows.Linux.ARM上的RTSP直播推送功能,配合EasyDarwin开源流媒体服务器,延时基本在1s以内,这个技术方案经过一年多时间, ...
- EasyDarwin开源手机直播方案：EasyPusher手机直播推送,EasyDarwin流媒体server,EasyPlayer手机播放器
在不断进行EasyDarwin开源流媒体server的功能和性能完好的同一时候,我们也配套实现了眼下在安防和移动互联网行业比較火热的移动端手机直播方案,主要就是我们的 EasyPusher直播推送项目 ...
- EasyRTMP手机直播推送rtmp流flash无法正常播放问题
本文转自EasyDarwin团队Kim的博客:http://blog.csdn.net/jinlong0603/article/details/52960750 问题简介 EasyRTMP是EasyD ...
- EasyRTMP实现的一套简单、高效、易用的全平台（Windows/Linux/ARM/Android/iOS）RTMP直播推送库
本文转自EasyDarwin开源团队成员Kim的博客:http://blog.csdn.net/jinlong0603/article/details/52938980 EasyRTMP介绍 Easy ...
- EasyRTMP视频直播推送H264 sps解析错误导致播放画面拉伸问题解决
EasyRTMP是将H264流以及AAC流以RTMP协议推送到RTMP服务器上进行直播.EasyRTMP推送库中会从H264流中提取中SPS.PPS进行解析,开发的时候遇到过有些SPS解析有误,获取到 ...
随机推荐
- C# 打印webBrowser打开的页面
this.webBrowser.Navigate(webBrowserUrl, tagerFrameName, postBuffer, heads); this.webBrowser.Document ...
- 标准C程序设计七---44
Linux应用 编程深入 语言编程 标准C程序设计七---经典C11程序设计 以下内容为阅读: <标准C程序设计>(第7版) 作者 ...
- 将xml转换为PHP数组
这里提供一个类来将XML转换为PHP数组,下面是类的代码 <?php/** * XML2Array: A class to convert XML to array in PHP * It re ...
- hdu 5400(思路题)
Arithmetic Sequence Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Othe ...
- poj 1573(搜索)
Robot Motion Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 12351 Accepted: 5982 Des ...
- LeetCode OJ--Triangle **
https://oj.leetcode.com/problems/triangle/ 一个三角形,类似于杨辉三角的形状,求从上到下最小的路径和,但走每一步都得是相邻的. 动态规划,从下到上一层层来. ...
- linux sed 替换（整行替换，部分替换）、删除delete、新增add、选取
sed命令行格式为: sed [-nefri] ‘command’ 输入文本 常用选项: -n∶使用安静(silent)模式.在一般 sed 的用法中,所有来自 STDI ...
- SSH命令总结
目录 一.ssh命令 二.端口转发 三.scp 命令 四.rsync命令 五.sz和rz命令 六. ssh-agent 七.ssh执行命令不退出问题 参考文章 一.ssh命令 登录类型 密码登录: 服 ...
- JDBC工具类 访问数据库 增删改查CRUD的通用方法
1 package com.zmh.util; 2 3 import java.sql.*; 4 import java.util.ArrayList; 5 import java.util.Hash ...
- ios 使用 resignFirstResponder 无法hide键盘
- (BOOL)disablesAutomaticKeyboardDismissal { return NO;}