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|
/*****************************************************************
|
| AP4 - Sample Objects
|
| Copyright 2002-2008 Axiomatic Systems, LLC
|
|
| This file is part of Bento4/AP4 (MP4 Atom Processing Library).
|
| Unless you have obtained Bento4 under a difference license,
| this version of Bento4 is Bento4|GPL.
| Bento4|GPL 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, or (at your option)
| any later version.
|
| Bento4|GPL 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 Bento4|GPL; see the file COPYING. If not, write to the
| Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
| 02111-1307, USA.
|
****************************************************************/
/*----------------------------------------------------------------------
| includes
+---------------------------------------------------------------------*/
#include "Ap4Sample.h"
#include "Ap4Utils.h"
#include "Ap4DataBuffer.h"
#include "Ap4Interfaces.h"
#include "Ap4ByteStream.h"
#include "Ap4Atom.h"
/*----------------------------------------------------------------------
| AP4_Sample::AP4_Sample
+---------------------------------------------------------------------*/
AP4_Sample::AP4_Sample() :
m_DataStream(NULL),
m_Offset(0),
m_Size(0),
m_Duration(0),
m_DescriptionIndex(0),
m_Dts(0),
m_CtsDelta(0),
m_IsSync(true)
{
}
/*----------------------------------------------------------------------
| AP4_Sample::AP4_Sample
+---------------------------------------------------------------------*/
AP4_Sample::AP4_Sample(AP4_ByteStream& data_stream,
AP4_Position offset,
AP4_Size size,
AP4_UI32 duration,
AP4_Ordinal description_index,
AP4_UI64 dts,
AP4_UI32 cts_delta,
bool is_sync) :
m_Offset(offset),
m_Size(size),
m_Duration(duration),
m_DescriptionIndex(description_index),
m_Dts(dts),
m_CtsDelta(cts_delta),
m_IsSync(is_sync)
{
m_DataStream = &data_stream;
AP4_ADD_REFERENCE(m_DataStream);
}
/*----------------------------------------------------------------------
| AP4_Sample::AP4_Sample
+---------------------------------------------------------------------*/
AP4_Sample::AP4_Sample(const AP4_Sample& other) :
m_DataStream(other.m_DataStream),
m_Offset(other.m_Offset),
m_Size(other.m_Size),
m_Duration(other.m_Duration),
m_DescriptionIndex(other.m_DescriptionIndex),
m_Dts(other.m_Dts),
m_CtsDelta(other.m_CtsDelta),
m_IsSync(other.m_IsSync)
{
AP4_ADD_REFERENCE(m_DataStream);
}
/*----------------------------------------------------------------------
| AP4_Sample::~AP4_Sample
+---------------------------------------------------------------------*/
AP4_Sample::~AP4_Sample()
{
AP4_RELEASE(m_DataStream);
}
/*----------------------------------------------------------------------
| AP4_Sample::operator=
+---------------------------------------------------------------------*/
AP4_Sample&
AP4_Sample::operator=(const AP4_Sample& other)
{
AP4_ADD_REFERENCE(other.m_DataStream);
AP4_RELEASE(m_DataStream);
m_DataStream = other.m_DataStream;
m_Offset = other.m_Offset;
m_Size = other.m_Size;
m_Duration = other.m_Duration;
m_DescriptionIndex = other.m_DescriptionIndex;
m_Dts = other.m_Dts;
m_CtsDelta = other.m_CtsDelta;
m_IsSync = other.m_IsSync;
return *this;
}
/*----------------------------------------------------------------------
| AP4_Sample::ReadData
+---------------------------------------------------------------------*/
AP4_Result
AP4_Sample::ReadData(AP4_DataBuffer& data)
{
return ReadData(data, m_Size);
}
/*----------------------------------------------------------------------
| AP4_Sample::ReadData
+---------------------------------------------------------------------*/
AP4_Result
AP4_Sample::ReadData(AP4_DataBuffer& data, AP4_Size size, AP4_Size offset)
{
// check that we have a stream
if (m_DataStream == NULL) return AP4_FAILURE;
// shortcut
if (size == 0) return AP4_SUCCESS;
// check the size
if (m_Size < size+offset) return AP4_FAILURE;
// set the buffer size
AP4_Result result = data.SetDataSize(size);
if (AP4_FAILED(result)) return result;
// get the data from the stream
result = m_DataStream->Seek(m_Offset+offset);
if (AP4_FAILED(result)) return result;
return m_DataStream->Read(data.UseData(), size);
}
/*----------------------------------------------------------------------
| AP4_Sample::GetDataStream
+---------------------------------------------------------------------*/
AP4_ByteStream*
AP4_Sample::GetDataStream()
{
AP4_ADD_REFERENCE(m_DataStream);
return m_DataStream;
}
/*----------------------------------------------------------------------
| AP4_Sample::SetDataStream
+---------------------------------------------------------------------*/
void
AP4_Sample::SetDataStream(AP4_ByteStream& stream)
{
AP4_RELEASE(m_DataStream);
m_DataStream = &stream;
AP4_ADD_REFERENCE(m_DataStream);
}
/*----------------------------------------------------------------------
| AP4_Sample::Detach
+---------------------------------------------------------------------*/
void
AP4_Sample::Detach()
{
AP4_RELEASE(m_DataStream);
m_DataStream = NULL;
}
/*----------------------------------------------------------------------
| AP4_Sample::Reset
+---------------------------------------------------------------------*/
void
AP4_Sample::Reset()
{
AP4_RELEASE(m_DataStream);
m_Offset = 0;
m_Size = 0;
m_Duration = 0;
m_DescriptionIndex = 0;
m_Dts = 0;
m_CtsDelta = 0;
m_IsSync = false;
}
|
