Simplify time representation; better in-tree DCP subtitle parser.

1 files changed, 124 insertions, 0 deletions

diff --git a/asdcplib/src/AS_DCP.cpp b/asdcplib/src/AS_DCP.cpp
new file mode 100755
index 0000000..0ae9a1f
--- /dev/null
+++ b/asdcplib/src/AS_DCP.cpp
@@ -0,0 +1,124 @@
+/*
+Copyright (c) 2004-2009, John Hurst
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+3. The name of the author may not be used to endorse or promote products
+   derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+/*! \file    AS_DCP.cpp
+    \version $Id: AS_DCP.cpp,v 1.6 2009/04/09 19:16:49 msheby Exp $       
+    \brief   AS-DCP library, misc classes and subroutines
+*/
+
+#include "AS_DCP_internal.h"
+#include <assert.h>
+
+const char*
+ASDCP::Version()
+{
+  return PACKAGE_VERSION;
+}
+
+
+//------------------------------------------------------------------------------------------
+//
+// frame buffer base class implementation
+
+ASDCP::FrameBuffer::FrameBuffer() :
+  m_Data(0), m_Capacity(0), m_OwnMem(false), m_Size(0),
+  m_FrameNumber(0), m_SourceLength(0), m_PlaintextOffset(0)
+{
+}
+
+ASDCP::FrameBuffer::~FrameBuffer()
+{
+  if ( m_OwnMem && m_Data != 0 )
+    free(m_Data);
+}
+
+// Instructs the object to use an externally allocated buffer. The external
+// buffer will not be cleaned up by the frame buffer when it is destroyed.
+// Call with (0,0) to revert to internally allocated buffer.
+// Returns error if the buf_addr argument is NULL and either buf_size is
+// non-zero or internally allocated memory is in use.
+ASDCP::Result_t
+ASDCP::FrameBuffer::SetData(byte_t* buf_addr, ui32_t buf_size)
+{
+  // if buf_addr is null and we have an external memory reference,
+  // drop the reference and place the object in the initialized-
+  // but-no-buffer-allocated state
+  if ( buf_addr == 0 )
+    {
+      if ( buf_size > 0 || m_OwnMem )
+	return RESULT_PTR;
+
+      m_OwnMem = false;
+      m_Capacity = m_Size = 0;
+      m_Data = 0;
+      return RESULT_OK;
+    }
+
+  if ( m_OwnMem && m_Data != 0 )
+    free(m_Data);
+
+  m_OwnMem = false;
+  m_Capacity = buf_size;
+  m_Data = buf_addr;
+  m_Size = 0;
+
+  return RESULT_OK;
+}
+
+// Sets the size of the internally allocate buffer. Returns RESULT_CAPEXTMEM
+// if the object is using an externally allocated buffer via SetData();
+// Resets content size to zero.
+ASDCP::Result_t
+ASDCP::FrameBuffer::Capacity(ui32_t cap_size)
+{
+  if ( ! m_OwnMem && m_Data != 0 )
+    return RESULT_CAPEXTMEM; // cannot resize external memory
+
+  if ( m_Capacity < cap_size )
+    {
+      if ( m_Data != 0 )
+	{
+	  assert(m_OwnMem);
+	  free(m_Data);
+	}
+
+      m_Data = (byte_t*)malloc(cap_size);
+
+      if ( m_Data == 0 )
+	return RESULT_ALLOC;
+
+      m_Capacity = cap_size;
+      m_OwnMem = true;
+      m_Size = 0;
+    }
+
+  return RESULT_OK;
+}
+
+
+//
+// end AS_DCP.cpp
+//