void MyJPEGVideoSource::doGetNextFrame() {
if (fFragmentLeftSize == 0) {
int parse_error_num = 0;
while (parse_error_num <=3)
{
//unsigned acquiredFrameSize;
u_int64_t frameDuration_usec;
bsreader_frame_info_t frame_info;
#ifdef CONFIG_APP_IPCAM_USE_BSBUFFER
while (gmi_bs_shm_read_one_packet(hBsBuffer, (char*)&(frame_info.bs_info), (char**)&(frame_info.frame_addr), &(frame_info.frame_size), &uPacketReadSN) != 0) {
usleep(20000);
continue;
}
#else
if (bsreader_get_one_frame(fStreamID, &frame_info) < 0) {
printf("bs reader gets frame error\n");
continue;
}
#endif
Boolean bIsNewSession = (frame_info.bs_info.session_id != fSessionID);
fSessionID = frame_info.bs_info.session_id;
//acquiredFrameSize = frame_info.frame_size;
if (!bIsNewSession) {
if (frame_info.bs_info.PTS < fPTS) {
frameDuration_usec = ((1<<30) +frame_info.bs_info.PTS - fPTS) * 100 / 9; //yzhu
} else {
frameDuration_usec = (frame_info.bs_info.PTS - fPTS) * 100 / 9; //pts is creatmented @ 90000Hz
}
} else
frameDuration_usec = 0;
fPresentationTime.tv_usec += (long) frameDuration_usec;
while(fPresentationTime.tv_usec >= 1000000)
{
fPresentationTime.tv_usec -= 1000000;
++fPresentationTime.tv_sec;
}
if (Parse(frame_info.frame_addr, frame_info.frame_size) ) {
fPTS = frame_info.bs_info.PTS;
break;
} else {
printf("Parse error, skip this one and read next\n");
parse_error_num++;
}
}
fFragmentOffset = 0;
}else {
fFragmentOffset += fFrameSize;
}
fFrameSize = fFragmentLeftSize > fMaxOutputPacketSize ? fMaxOutputPacketSize : fFragmentLeftSize;
memcpy(fTo,fFragmentBeginAddr, fFrameSize );
fFragmentLeftSize -= fFrameSize;
fFragmentBeginAddr += fFrameSize;
afterGetting(this);
}
/*1 for get h264 2 for get jpeg format*/
int GetH264Buffer(void* handle,void **ppBuffer,u32 *pBufSize)
{
void *pGetBuffer=*ppBuffer;
u32 bufsize = *pBufSize;
u32 charsize=100*1024;
std::auto_ptr<char> pChar2(new char[charsize]);
int ret;
bs_info_t header;
char *packaddr,*lastpackaddr=NULL;
unsigned int packsize,packread=0,lastpacksize=0;
int hasread=0;
int tries = 0;
do
{
memset(&header,0,sizeof(header));
ret = gmi_bs_shm_read_one_packet(handle,(char*)&header,&packaddr,&packsize,&packread);
APP_ERROR("ret = %d\n",ret);
if (ret >= 0)
{
APP_ERROR("type = %d\n",header.pic_type);
if (header.pic_type == JPEG_STREAM)
{
hasread = 2;
lastpackaddr = packaddr;
lastpacksize = packsize;
break;
}
else if (header.pic_type == I_FRAME || header.pic_type == IDR_FRAME)
{
if (hasread < 2)
{
hasread = 1;
lastpackaddr = packaddr;
lastpacksize = packsize;
break;
}
}
}
else
{
usleep(100000);
}
tries ++;
}while(tries <= 100);
if (hasread == 0)
{
/*nothing to read */
ret = -ENODEV;
APP_ERROR("\n");
goto fail;
}
if (bufsize < lastpacksize || pGetBuffer == NULL)
{
if (bufsize < lastpacksize)
{
bufsize = lastpacksize;
}
pGetBuffer = malloc(bufsize);
}
if (pGetBuffer == NULL)
{
ret = -ENOMEM;
APP_ERROR("\n");
goto fail;
}
memcpy(pGetBuffer,lastpackaddr,lastpacksize);
*ppBuffer = pGetBuffer;
*pBufSize = lastpacksize;
return hasread;
fail:
if (pGetBuffer && pGetBuffer != *ppBuffer)
{
free(pGetBuffer);
}
pGetBuffer = NULL;
return ret;
}
