src: vod-server: import sources

This patch adds the source tree of the Video-On-Demand server and
its configuration scripts.

Change-Id: I6db8c43d46c7450baf117a541bd7153496dbcd4c
Signed-off-by: Christian Gromm <christian.gromm@microchip.com>

1 files changed, 187 insertions, 0 deletions

diff --git a/Src/Multiplexer/RingBuffer.h b/Src/Multiplexer/RingBuffer.h
new file mode 100644
index 0000000..29cafcd
--- /dev/null
+++ b/Src/Multiplexer/RingBuffer.h
@@ -0,0 +1,187 @@
+/*
+ * Video On Demand Samples
+ *
+ * Copyright (C) 2015 Microchip Technology Germany II GmbH & Co. KG
+ *
+ * This program 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.
+ *
+ * This program 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/>.
+ *
+ * You may also obtain this software under a propriety license from Microchip.
+ * Please contact Microchip for further information.
+ *
+ */
+
+/*----------------------------------------------------------*/
+/*! \file
+ *  \brief  This file contains the CRingBuffer class.
+ */
+/*----------------------------------------------------------*/
+
+#ifndef CRINGBUFFER_H
+#define CRINGBUFFER_H
+
+#include "Console.h"
+
+
+/*----------------------------------------------------------*/
+/*! \brief Class providing a ring buffer. One thread can
+*        write to the buffer while another thread is reading
+*        from it. This class has highest performance for
+*        synchronization, since it is not using mutexes.
+*
+*        LIMITATIONS:
+*        - only one thread can read
+*        - only one thread can write
+*        - the ring buffer size needs to be aligned to
+*          read, write block size
+*
+*        Violating any limitation will lead to unpredictable
+*        results.
+*/
+/*----------------------------------------------------------*/
+class CRingBuffer
+{
+    uint8_t *m_pBuf;
+    uint32_t m_nWriteTot;                                   // total bytes written to ring buffer
+    uint32_t m_nReadTot;                                    // total bytes read from ring buffer
+    uint32_t m_nWritePos;                                   // memory write position
+    uint32_t m_nReadPos;                                    // memory read position
+    uint32_t m_nReadLen;                                    // bytes per read
+    uint32_t m_nWriteLen;                                   // bytes per write
+    uint32_t m_nBufLen;                                     // bytes of buffer
+
+public:
+    /*----------------------------------------------------------*/
+    /*! \brief constructs a ring buffer instance
+     *  \param nReadLen - read block size in bytes
+     *  \param nWriteLen - write block size in bytes
+     *  \param nWriteBlocks - total buffer size counted in write
+     *         blocks
+     */
+    /*----------------------------------------------------------*/
+    CRingBuffer(uint32_t nReadLen, uint32_t nWriteLen, uint32_t nWriteBlocks)
+        : m_nWriteTot(0)
+        , m_nReadTot(0)
+        , m_nWritePos(0)
+        , m_nReadPos(0)
+        , m_nReadLen(nReadLen)
+        , m_nWriteLen(nWriteLen)
+	, m_nBufLen(nWriteBlocks*nWriteLen)
+    {
+        if ( 0 != (m_nBufLen % m_nReadLen) ) {
+            ConsolePrintf( PRIO_ERROR, RED"! ring size needs to be dividable by read block size"RESETCOLOR);
+            throw (-10);
+        }
+        m_pBuf = new uint8_t[m_nBufLen];
+
+        if (NULL == m_pBuf) {
+            ConsolePrintf( PRIO_ERROR, RED"! out of memory"RESETCOLOR);
+            throw (-10);
+        }
+    }
+
+
+
+    /*----------------------------------------------------------*/
+    /*! \brief destructs ring buffer instance
+     */
+    /*----------------------------------------------------------*/
+    ~CRingBuffer()
+    {
+        delete m_pBuf;
+    }
+
+
+
+    /*----------------------------------------------------------*/
+    /*! \brief checks if there is enough memory available to
+     *        write a chunk of data to the ring buffer
+     * \return true, if can be written
+     */
+    /*----------------------------------------------------------*/
+    bool GetCanWrite()
+    {
+        uint32_t nFilled = m_nWriteTot - m_nReadTot;            
+        return nFilled < m_nBufLen - m_nWriteLen;
+    }
+
+
+
+    /*----------------------------------------------------------*/
+    /*! \brief checks if there is enough memory available to
+     *        read a chunk of data from the ring buffer
+     * \return true, if can be read
+     */
+    /*----------------------------------------------------------*/
+    bool GetCanRead()
+    {
+        uint32_t nFilled = m_nWriteTot - m_nReadTot;            
+        return nFilled >= m_nReadLen;  
+    }
+
+
+
+    /*----------------------------------------------------------*/
+    /*! \brief gets pointer to current read position
+     * \return pointer to current read position
+     */
+    /*----------------------------------------------------------*/
+    uint8_t *GetReadPos()
+    {
+        return m_pBuf + m_nReadPos;                             
+    }
+
+
+
+    /*----------------------------------------------------------*/
+    /*! \brief gets pointer to current write position
+     * \return pointer to current write position
+     */
+    /*----------------------------------------------------------*/
+    uint8_t *GetWritePos()
+    {
+        return m_pBuf + m_nWritePos;                            
+    }
+
+
+
+    /*----------------------------------------------------------*/
+    /*! \brief called after a chunk of data has been written
+     *        to the ring buffer
+     */
+    /*----------------------------------------------------------*/
+    void WriteDone()
+    {
+        m_nWriteTot += m_nWriteLen;
+        m_nWritePos += m_nWriteLen;
+        if (m_nBufLen == m_nWritePos)
+            m_nWritePos = 0;
+    }
+
+
+
+    /*----------------------------------------------------------*/
+    /*! \brief called after a chunk of data has been read
+     *        from the ring buffer
+     */
+    /*----------------------------------------------------------*/
+    void ReadDone()
+    {
+        m_nReadTot += m_nReadLen;
+        m_nReadPos += m_nReadLen;
+        if (m_nBufLen == m_nReadPos)
+            m_nReadPos = 0;
+    }
+};
+
+#endif