Added old KDE3 version of kradio

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/kradio@1094417 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 131 insertions, 0 deletions

diff --git a/kradio3/src/multibuffer.cpp b/kradio3/src/multibuffer.cpp
new file mode 100644
index 0000000..5ed4bd0
--- /dev/null
+++ b/kradio3/src/multibuffer.cpp
@@ -0,0 +1,131 @@
+/***************************************************************************
+                          multibuffer.cpp
+                             -------------------
+    begin                : Sat Aug 20 2005
+    copyright            : (C) 2005 by Martin Witte
+    email                : [email protected]
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   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 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+#include <klocale.h>
+
+#include "include/multibuffer.h"
+
+MultiBuffer::MultiBuffer(size_t n_buffers, size_t buffersize)
+    : m_nBuffers(n_buffers),
+      m_BufferSize(buffersize),
+      m_currentReadBuffer(m_nBuffers-1), // during wait4read, this will be incremented to 0
+      m_currentWriteBuffer(0),
+      m_readLock(n_buffers),
+      m_errorString(QString::null),
+      m_error(false)
+{
+    m_readLock += m_nBuffers;
+
+    m_buffers = new char* [m_nBuffers];
+    m_buffersFill = new size_t [m_nBuffers];
+    for (size_t i = 0; i < m_nBuffers; ++i) {
+        m_buffers    [i] = new char [m_BufferSize];
+        m_buffersFill[i] = 0;
+    }
+}
+
+MultiBuffer::~MultiBuffer()
+{
+    for (size_t i = 0; i < m_nBuffers; ++i) {
+        delete m_buffers[i];
+    }
+    delete m_buffers;
+    delete m_buffersFill;
+    m_buffersFill = NULL;
+    m_buffers = NULL;
+}
+
+size_t MultiBuffer::getAvailableWriteBuffer() const
+{
+    size_t bytesAvailable = m_BufferSize - m_buffersFill[m_currentWriteBuffer];
+    return m_currentWriteBuffer != m_currentReadBuffer ? bytesAvailable : 0;
+}
+
+size_t MultiBuffer::getAvailableReadBuffers() const
+{
+    return m_readLock.available();
+}
+
+char *MultiBuffer::lockWriteBuffer(size_t &bufferSize)
+{
+    size_t bytesAvailable = m_BufferSize - m_buffersFill[m_currentWriteBuffer];
+
+    if (m_currentWriteBuffer != m_currentReadBuffer && bytesAvailable > 0) {
+        bufferSize = bytesAvailable;
+        return m_buffers[m_currentWriteBuffer] + m_buffersFill[m_currentWriteBuffer];
+    }
+/*    QString tmp;
+    IErrorLogClient::staticLogDebug(tmp.sprintf("current input buffer: %li", m_currentInputBuffer));
+    IErrorLogClient::staticLogDebug(tmp.sprintf("inputAvailableLock: %i",   m_inputAvailableLock.available()));
+    for (size_t i = 0; i < m_config.m_EncodeBufferCount; ++i) {
+        IErrorLogClient::staticLogDebug(tmp.sprintf("input buffer %li: fill = %li", i, m_buffersInputFill[i]));
+    }
+*/
+/*    m_error = true;
+    m_errorString += i18n("Buffer Overflow. ");*/
+    return NULL;
+}
+
+
+bool  MultiBuffer::unlockWriteBuffer(size_t bufferSize) // return value: complete buffer ready for read
+{
+    bool retval = false;
+    if (m_buffersFill[m_currentWriteBuffer] + bufferSize > m_BufferSize) {
+        m_error = true;
+        m_errorString += i18n("Buffer Overflow. ");
+    } else if (bufferSize > 0) {
+        m_buffersFill[m_currentWriteBuffer] += bufferSize;
+
+        if (m_buffersFill[m_currentWriteBuffer] == m_BufferSize) {
+            m_currentWriteBuffer = (m_currentWriteBuffer+1 < m_nBuffers) ? m_currentWriteBuffer + 1 : 0;
+            m_readLock--;
+            retval = true;
+        }
+    }
+    return retval;
+}
+
+
+void  MultiBuffer::unlockAllWriteBuffers()
+{
+    m_currentWriteBuffer = m_currentReadBuffer;
+    // there are at maximum m_nBuffers - 1 full buffers. The nth buffer is the current read buffer
+    m_readLock -= m_nBuffers - 1 - m_readLock.available();
+}
+
+
+char *MultiBuffer::wait4ReadBuffer(size_t &buffer_fill)
+{
+    m_buffersFill[m_currentReadBuffer] = 0; // mark buffer as empty again
+    m_readLock++;
+    m_currentReadBuffer = (m_currentReadBuffer+1 < m_nBuffers) ? m_currentReadBuffer + 1 : 0;
+    buffer_fill = m_buffersFill[m_currentReadBuffer];
+    return m_buffers[m_currentReadBuffer];
+}
+
+
+char *MultiBuffer::getCurrentReadBuffer(size_t &buffer_fill) const
+{
+    buffer_fill = m_buffersFill[m_currentReadBuffer];
+    return m_buffers[m_currentReadBuffer];
+}
+
+void MultiBuffer::resetError()
+{
+    m_error = false;
+    m_errorString = QString::null;
+}