void FramedSource::stopGettingFrames() {
fIsCurrentlyAwaitingData = False; // indicates that we can be read again
fAfterGettingFunc = NULL;
fOnCloseFunc = NULL;
// Perform any specialized action now:
doStopGettingFrames();
}
void EasyCameraSource::stopGettingFrames()
{
OSMutexLocker locker(this->GetMutex());
fOnCloseFunc = NULL;
doStopGettingFrames();
}
void LiveVideoStreamSource::deliverFrame() {
// This function is called when new frame data is available from the device.
// We deliver this data by copying it to the 'downstream' object, using the following parameters (class members):
// 'in' parameters (these should *not* be modified by this function):
// fTo: The frame data is copied to this address.
// (Note that the variable "fTo" is *not* modified. Instead,
// the frame data is copied to the address pointed to by "fTo".)
// fMaxSize: This is the maximum number of bytes that can be copied
// (If the actual frame is larger than this, then it should
// be truncated, and "fNumTruncatedBytes" set accordingly.)
// 'out' parameters (these are modified by this function):
// fFrameSize: Should be set to the delivered frame size (<= fMaxSize).
// fNumTruncatedBytes: Should be set iff the delivered frame would have been
// bigger than "fMaxSize", in which case it's set to the number of bytes
// that have been omitted.
// fPresentationTime: Should be set to the frame's presentation time
// (seconds, microseconds). This time must be aligned with 'wall-clock time' - i.e., the time that you would get
// by calling "gettimeofday()".
// fDurationInMicroseconds: Should be set to the frame's duration, if known.
// If, however, the device is a 'live source' (e.g., encoded from a camera or microphone), then we probably don't need
// to set this variable, because - in this case - data will never arrive 'early'.
// Note the code below.
// we're not ready for the data yet
if (!isCurrentlyAwaitingData()) {
printf("Frame LOSS!!!!!!!!\n");
return;
}
VENC_CHN_STAT_S stStat;
VENC_STREAM_S stStream;
HI_S32 s32Ret;
s32Ret = HI_MPI_VENC_Query(fChannelNo, &stStat);
if (HI_SUCCESS != s32Ret)
{
return;
}
if (stStat.u32CurPacks <= 0) {
return;
}
stStream.pstPack = (VENC_PACK_S *)alloca(sizeof(VENC_PACK_S) * stStat.u32CurPacks);
stStream.u32PackCount = stStat.u32CurPacks;
stStream.u32Seq = 0;
memset(&stStream.stH264Info, 0, sizeof(VENC_STREAM_INFO_H264_S));
s32Ret = HI_MPI_VENC_GetStream(fChannelNo, &stStream, HI_FALSE);
if (HI_SUCCESS != s32Ret)
{
g_critical("HI_MPI_VENC_GetStream failed with %#x!\n", s32Ret);
return;
}
fPresentationTime.tv_sec = stStream.pstPack[0].u64PTS / 1000000UL;
fPresentationTime.tv_usec = stStream.pstPack[0].u64PTS % 1000000UL;
fFrameSize = 0;
for (int i = 0; i < stStream.u32PackCount; i++) {
for (int j = 0; j < ARRAY_SIZE(stStream.pstPack[i].pu8Addr); j++) {
HI_U8 *p = stStream.pstPack[i].pu8Addr[j];
HI_U32 len = stStream.pstPack[i].u32Len[j];
if (len == 0)
continue;
if (len >= 3 && p[0] == 0x00 && p[1] == 0x00 && p[2] == 0x01) {
p += 3;
len -= 3;
}
if (len >= 4 && p[0] == 0x00 && p[1] == 0x00 && p[2] == 0x00 && p[3] == 0x01) {
p += 4;
len -= 4;
}
if (fFrameSize + len > fMaxSize) {
g_critical("Package Length execute the fMaxSize\n");
break;
}
memmove(&fTo[fFrameSize], p, len);
fFrameSize += len;
}
}
s32Ret = HI_MPI_VENC_ReleaseStream(fChannelNo, &stStream);
if (HI_SUCCESS != s32Ret)
{
g_critical("HI_MPI_VENC_ReleaseStream failed with %#x!\n", s32Ret);
}
doStopGettingFrames();
// After delivering the data, inform the reader that it is now available:
FramedSource::afterGetting(this);
}