本文整理汇总了C++中FrameBuffer::RoData方法的典型用法代码示例。如果您正苦于以下问题：C++ FrameBuffer::RoData方法的具体用法？C++ FrameBuffer::RoData怎么用？C++ FrameBuffer::RoData使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类FrameBuffer的用法示例。
在下文中一共展示了FrameBuffer::RoData方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: memcpy
ASDCP::Result_t
ASDCP::MPEG2::Parser::h__Parser::ReadFrame(FrameBuffer& FB)
{
Result_t result = RESULT_OK;
ui32_t write_offset = 0;
ui32_t read_count = 0;
FB.Size(0);
if ( m_EOF )
return RESULT_ENDOFFILE;
// Data is read in VESReadSize chunks. Each chunk is parsed, and the
// process is stopped when a Sequence or Picture header is found or when
// the input file is exhausted. The partial next frame is cached for the
// next call.
m_ParserDelegate.Reset();
m_Parser.Reset();
if ( m_TmpBuffer.Size() > 0 )
{
memcpy(FB.Data(), m_TmpBuffer.RoData(), m_TmpBuffer.Size());
result = m_Parser.Parse(FB.RoData(), m_TmpBuffer.Size());
write_offset = m_TmpBuffer.Size();
m_TmpBuffer.Size(0);
}
while ( ! m_ParserDelegate.m_CompletePicture && result == RESULT_OK )
{
if ( FB.Capacity() < ( write_offset + VESReadSize ) )
{
DefaultLogSink().Error("FrameBuf.Capacity: %u FrameLength: %u\n",
FB.Capacity(), ( write_offset + VESReadSize ));
return RESULT_SMALLBUF;
}
result = m_FileReader.Read(FB.Data() + write_offset, VESReadSize, &read_count);
if ( result == RESULT_ENDOFFILE || read_count == 0 )
{
m_EOF = true;
if ( write_offset > 0 )
result = RESULT_OK;
}
if ( ASDCP_SUCCESS(result) )
{
result = m_Parser.Parse(FB.RoData() + write_offset, read_count);
write_offset += read_count;
}
if ( m_EOF )
break;
}
assert(m_ParserDelegate.m_FrameSize <= write_offset);
if ( ASDCP_SUCCESS(result)
&& m_ParserDelegate.m_FrameSize < write_offset )
{
assert(m_TmpBuffer.Size() == 0);
ui32_t diff = write_offset - m_ParserDelegate.m_FrameSize;
assert(diff <= m_TmpBuffer.Capacity());
memcpy(m_TmpBuffer.Data(), FB.RoData() + m_ParserDelegate.m_FrameSize, diff);
m_TmpBuffer.Size(diff);
}
if ( ASDCP_SUCCESS(result) )
{
const byte_t* p = FB.RoData();
if ( p[0] != 0 || p[1] != 0 || p[2] != 1 || ! ( p[3] == SEQ_START || p[3] == PIC_START ) )
{
DefaultLogSink().Error("Frame buffer does not begin with a PIC or SEQ start code.\n");
return RESULT_RAW_FORMAT;
}
}
if ( ASDCP_SUCCESS(result) )
{
FB.Size(m_ParserDelegate.m_FrameSize);
FB.TemporalOffset(m_ParserDelegate.m_TemporalRef);
FB.FrameType(m_ParserDelegate.m_FrameType);
FB.PlaintextOffset(m_ParserDelegate.m_PlaintextOffset);
FB.FrameNumber(m_FrameNumber++);
FB.GOPStart(m_ParserDelegate.m_HasGOP);
FB.ClosedGOP(m_ParserDelegate.m_ClosedGOP);
}
return result;
}