diff options
| author | povaddict <povaddict@users.sourceforge.net> | 2010-02-10 02:16:44 +0300 |
|---|---|---|
| committer | povaddict <povaddict@users.sourceforge.net> | 2010-02-10 02:16:44 +0300 |
| commit | 726a91b12a7524e45e7a901c9e4883af5b1bffe6 (patch) | |
| tree | f5d25e3b2e84c92f4901280c73d5d3d7e6c3cd19 /src/DSUtil/H264Nalu.cpp | |
| parent | 02183f6e47ad4ea1057de9950482f291f2ae4290 (diff) | |
Rename several directories to use MixedCase instead of lowercase.
They now mostly match the case used in #includes,
and they're consistent with the names of the .h files they contain.
git-svn-id: https://mpc-hc.svn.sourceforge.net/svnroot/mpc-hc/trunk@1648 10f7b99b-c216-0410-bff0-8a66a9350fd8
Diffstat (limited to 'src/DSUtil/H264Nalu.cpp')
| -rw-r--r-- | src/DSUtil/H264Nalu.cpp | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/src/DSUtil/H264Nalu.cpp b/src/DSUtil/H264Nalu.cpp new file mode 100644 index 000000000..81e71575d --- /dev/null +++ b/src/DSUtil/H264Nalu.cpp @@ -0,0 +1,99 @@ +/*
+ * $Id$
+ *
+ * (C) 2006-2010 see AUTHORS
+ *
+ * This file is part of mplayerc.
+ *
+ * Mplayerc is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Mplayerc is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "StdAfx.h"
+#include "H264Nalu.h"
+
+void CH264Nalu::SetBuffer(BYTE* pBuffer, int nSize, int nNALSize)
+{
+ m_pBuffer = pBuffer;
+ m_nSize = nSize;
+ m_nNALSize = nNALSize;
+ m_nCurPos = 0;
+ m_nNextRTP = 0;
+
+ m_nNALStartPos = 0;
+ m_nNALDataPos = 0;
+}
+
+bool CH264Nalu::MoveToNextStartcode()
+{
+ int nBuffEnd = (m_nNextRTP > 0) ? min (m_nNextRTP, m_nSize-4) : m_nSize-4;
+
+ for (int i=m_nCurPos; i<nBuffEnd; i++)
+ {
+ if ((*((DWORD*)(m_pBuffer+i)) & 0x00FFFFFF) == 0x00010000)
+ {
+ // Find next AnnexB Nal
+ m_nCurPos = i;
+ return true;
+ }
+ }
+
+ if ((m_nNALSize != 0) && (m_nNextRTP < m_nSize))
+ {
+ m_nCurPos = m_nNextRTP;
+ return true;
+ }
+
+ m_nCurPos = m_nSize;
+ return false;
+}
+
+bool CH264Nalu::ReadNext()
+{
+ int nTemp;
+
+ if (m_nCurPos >= m_nSize) return false;
+
+ if ((m_nNALSize != 0) && (m_nCurPos == m_nNextRTP))
+ {
+ // RTP Nalu type : (XX XX) XX XX NAL..., with XX XX XX XX or XX XX equal to NAL size
+ m_nNALStartPos = m_nCurPos;
+ m_nNALDataPos = m_nCurPos + m_nNALSize;
+ nTemp = 0;
+ for (int i=0; i<m_nNALSize; i++)
+ {
+ nTemp = (nTemp << 8) + m_pBuffer[m_nCurPos++];
+ }
+ m_nNextRTP += nTemp + m_nNALSize;
+ MoveToNextStartcode();
+ }
+ else
+ {
+ // Remove trailing bits
+ while (m_pBuffer[m_nCurPos]==0x00 && ((*((DWORD*)(m_pBuffer+m_nCurPos)) & 0x00FFFFFF) != 0x00010000))
+ m_nCurPos++;
+
+ // AnnexB Nalu : 00 00 01 NAL...
+ m_nNALStartPos = m_nCurPos;
+ m_nCurPos += 3;
+ m_nNALDataPos = m_nCurPos;
+ MoveToNextStartcode();
+ }
+
+ forbidden_bit = (m_pBuffer[m_nNALDataPos]>>7) & 1;
+ nal_reference_idc = (m_pBuffer[m_nNALDataPos]>>5) & 3;
+ nal_unit_type = (NALU_TYPE) (m_pBuffer[m_nNALDataPos] & 0x1f);
+
+ return true;
+}
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