本文整理汇总了C++中FrameBuffer::GetFrame方法的典型用法代码示例。如果您正苦于以下问题:C++ FrameBuffer::GetFrame方法的具体用法?C++ FrameBuffer::GetFrame怎么用?C++ FrameBuffer::GetFrame使用的例子?那么, 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::GetFrame方法的5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: CompensateFrame
//Called to perform motion compensated addition/subtraction on an entire frame.
void MotionCompensator::CompensateFrame(FrameBuffer& my_buffer,int fnum,const MvData& mv_data)
{
int ref1_idx,ref2_idx;
Frame& my_frame=my_buffer.GetFrame(fnum);
const FrameSort& fsort=my_frame.GetFparams().FSort();
m_cformat = my_frame.GetFparams().CFormat();
if (fsort!=I_frame)
{//we can motion compensate
const vector<int>& refs=my_frame.GetFparams().Refs();
if (refs.size()>0)
{
//extract the references
ref1_idx=refs[0];
if (refs.size()>1)
ref2_idx=refs[1];
else
ref2_idx=refs[0];
const Frame& ref1frame=my_buffer.GetFrame(ref1_idx);
const Frame& ref2frame=my_buffer.GetFrame(ref2_idx);
luma_or_chroma = true;
//now do all the components
CompensateComponent( my_frame , ref1frame , ref2frame , mv_data , Y_COMP);
if ( m_cformat != Yonly )
{
luma_or_chroma = false;
CompensateComponent( my_frame , ref1frame , ref2frame , mv_data , U_COMP);
CompensateComponent( my_frame , ref1frame , ref2frame , mv_data , V_COMP);
}
}
}
}
示例2: DoME
void MotionEstimator::DoME(const FrameBuffer& my_buffer, int frame_num, MEData& me_data)
{
const FrameParams& fparams = my_buffer.GetFrame(frame_num).GetFparams();
// Step 1.
//Initial search gives vectors for each reference accurate to 1 pixel
PixelMatcher pix_match( m_encparams );
pix_match.DoSearch( my_buffer , frame_num , me_data);
float lambda;
// Get the references
const std::vector<int>& refs = my_buffer.GetFrame(frame_num).GetFparams().Refs();
const int num_refs = refs.size();
if ( fparams.IsBFrame())
lambda = m_encparams.L2MELambda();
else
lambda = m_encparams.L1MELambda();
// Set up the lambda to be used
me_data.SetLambdaMap( num_refs , lambda );
MVPrecisionType orig_prec = m_encparams.MVPrecision();
// Step 2.
// Pixel accurate vectors are then refined to sub-pixel accuracy
if (orig_prec != MV_PRECISION_PIXEL)
{
SubpelRefine pelrefine( m_encparams );
pelrefine.DoSubpel( my_buffer , frame_num , me_data );
}
else
{
// FIXME: HACK HACK
// Mutiplying the motion vectors by 2 and setting MV precision to
// HALF_PIXEL to implement pixel accurate motion estimate
MvArray &mv_arr1 = me_data.Vectors(1);
for (int j = 0; j < mv_arr1.LengthY(); ++j)
{
for (int i = 0; i < mv_arr1.LengthX(); ++i)
mv_arr1[j][i] = mv_arr1[j][i] << 1;
}
if (num_refs > 1)
{
MvArray &mv_arr2 = me_data.Vectors(2);
for (int j = 0; j < mv_arr2.LengthY(); ++j)
{
for (int i = 0; i < mv_arr2.LengthX(); ++i)
mv_arr2[j][i] = mv_arr2[j][i] << 1;
}
}
m_encparams.SetMVPrecision(MV_PRECISION_HALF_PIXEL);
}
// Step3.
// We now have to decide how each macroblock should be split
// and which references should be used, and so on.
ModeDecider my_mode_dec( m_encparams );
my_mode_dec.DoModeDecn( my_buffer , frame_num , me_data );
if (orig_prec == MV_PRECISION_PIXEL)
{
// FIXME: HACK HACK
// Divide the motion vectors by 2 to convert back to pixel
// accurate motion vectors and reset MV precision to
// PIXEL accuracy
MvArray &mv_arr1 = me_data.Vectors(1);
for (int j = 0; j < mv_arr1.LengthY(); ++j)
{
for (int i = 0; i < mv_arr1.LengthX(); ++i)
mv_arr1[j][i] = mv_arr1[j][i] >> 1;
}
if (num_refs > 1)
{
MvArray &mv_arr2 = me_data.Vectors(2);
for (int j = 0; j < mv_arr2.LengthY(); ++j)
{
for (int i = 0; i < mv_arr2.LengthX(); ++i)
mv_arr2[j][i] = mv_arr2[j][i]>>1;
}
}
示例3: CompensateFrame
//Called to perform motion compensated addition/subtraction on an entire frame.
void MotionCompensator::CompensateFrame( const AddOrSub direction ,
FrameBuffer& my_buffer ,
int fnum ,
const MvData& mv_data)
{
m_add_or_sub = direction;
int ref1_idx,ref2_idx;
Frame& my_frame=my_buffer.GetFrame(fnum);
const FrameSort& fsort=my_frame.GetFparams().FSort();
m_cformat = my_frame.GetFparams().CFormat();
if (fsort.IsInter())
{ //we can motion compensate
const std::vector<int>& refs=my_frame.GetFparams().Refs();
if (refs.size()>0)
{
//extract the references
ref1_idx = refs[0];
if ( refs.size()>1 )
ref2_idx = refs[1];
else
ref2_idx = refs[0];
const Frame& ref1frame = my_buffer.GetFrame(ref1_idx);
const Frame& ref2frame = refs.size() > 0 ? my_buffer.GetFrame(ref2_idx) : ref1frame;
// Now check that references are marked correctly
if ( !ref1frame.GetFparams().FSort().IsRef() )
{
std::cout<<std::endl<<"WARNING! Reference frame (number "<<ref1_idx;
std::cout<<") being used is not marked as a reference. Incorrect output is likely.";
}
if ( ref1frame.GetFparams().FrameNum() != ref1_idx)
{
std::cout<<std::endl<<"WARNING! Reference frame (number "<<ref1_idx;
std::cout<<") not available in buffer. Incorrect output is likely.";
}
if ( refs.size()>1 )
{
if ( !ref2frame.GetFparams().FSort().IsRef() )
{
std::cout<<std::endl<<"WARNING! Reference frame (number ";
std::cout<<ref2_idx<<") being used is not marked as a reference. Incorrect output is likely.";
}
if ( ref2frame.GetFparams().FrameNum() != ref2_idx)
{
std::cout<<std::endl<<"WARNING! Reference frame (number "<<ref2_idx;
std::cout<<") not available in buffer. Incorrect output is likely.";
}
}
luma_or_chroma = true;
//now do all the components
CompensateComponent( my_frame , ref1frame , ref2frame , mv_data , Y_COMP);
luma_or_chroma = false;
CompensateComponent( my_frame , ref1frame , ref2frame , mv_data , U_COMP);
CompensateComponent( my_frame , ref1frame , ref2frame , mv_data , V_COMP);
}
}
}
示例4: Compress
void FrameCompressor::Compress( FrameBuffer& my_buffer, const FrameBuffer& orig_buffer , int fnum )
{
FrameOutputManager& foutput = m_encparams.BitsOut().FrameOutput();
Frame& my_frame = my_buffer.GetFrame( fnum );
const FrameParams& fparams = my_frame.GetFparams();
const FrameSort& fsort = fparams.FSort();
const ChromaFormat cformat = fparams.CFormat();
// number of bits written, without byte alignment
unsigned int num_mv_bits;
m_medata_avail = false;
CompCompressor my_compcoder(m_encparams , fparams );
if (m_me_data)
{
delete m_me_data;
m_me_data = 0;
}
if ( fsort != I_frame )
{
m_me_data = new MEData( m_encparams.XNumMB() , m_encparams.YNumMB());
// Motion estimate first
MotionEstimator my_motEst( m_encparams );
bool is_a_cut = my_motEst.DoME( orig_buffer , fnum , *m_me_data );
// If we have a cut, and an L1 frame, then turn into an I-frame
if ( is_a_cut )
{
my_frame.SetFrameSort( I_frame );
if ( m_encparams.Verbose() )
std::cerr<<std::endl<<"Cut detected and I-frame inserted!";
}
}
// Write the frame header. We wait until after motion estimation, since
// this allows us to do cut-detection and (possibly) to decide whether
// or not to skip a frame before actually encoding anything. However we
// can do this at any point prior to actually writing any frame data.
WriteFrameHeader( my_frame.GetFparams() );
if ( !m_skipped )
{ // If not skipped we continue with the coding ...
if ( fsort != I_frame)
{
// Code the MV data
// If we're using global motion parameters, code them
if (m_use_global)
{
/*
Code the global motion parameters
TBC ....
*/
}
// If we're using block motion vectors, code them
if ( m_use_block_mv )
{
MvDataCodec my_mv_coder( &( foutput.MVOutput().Data() ) , 50 , cformat);
my_mv_coder.InitContexts();//may not be necessary
num_mv_bits = my_mv_coder.Compress( *m_me_data );
UnsignedGolombCode( foutput.MVOutput().Header() , num_mv_bits);
}
// Then motion compensate
MotionCompensator mycomp( m_encparams , SUBTRACT);
mycomp.CompensateFrame( my_buffer , fnum , *m_me_data );
}//?fsort
//code component data
my_compcoder.Compress( my_buffer.GetComponent( fnum , Y_COMP) );
if (cformat != Yonly)
{
my_compcoder.Compress( my_buffer.GetComponent( fnum , U_COMP) );
my_compcoder.Compress( my_buffer.GetComponent( fnum , V_COMP) );
}
//motion compensate again if necessary
if ( fsort != I_frame )
{
MotionCompensator mycomp( m_encparams , ADD);
mycomp.CompensateFrame( my_buffer , fnum , *m_me_data );
// Set me data available flag
m_medata_avail = true;
}//?fsort
//finally clip the data to keep it in range
//.........这里部分代码省略.........
示例5: DoModeDecn
void ModeDecider::DoModeDecn(const FrameBuffer& my_buffer, int frame_num, MEData& me_data)
{
// We've got 'raw' block motion vectors for up to two reference frames. Now we want
// to make a decision as to mode. In this initial implementation, this is bottom-up
// i.e. find mvs for MBs and sub-MBs and see whether it's worthwhile merging.
int ref1,ref2;
// Initialise //
////////////////
fsort = my_buffer.GetFrame(frame_num).GetFparams().FSort();
if (fsort.IsInter())
{
// Extract the references
const vector<int>& refs = my_buffer.GetFrame(frame_num).GetFparams().Refs();
num_refs = refs.size();
ref1 = refs[0];
// The picture we're doing estimation from
m_pic_data = &(my_buffer.GetComponent( frame_num , Y_COMP));
// Set up the hierarchy of motion vector data objects
m_me_data_set[0] = new MEData( m_encparams.XNumMB() , m_encparams.YNumMB() ,
m_encparams.XNumBlocks()/4 , m_encparams.YNumBlocks()/4, num_refs );
m_me_data_set[1] = new MEData( m_encparams.XNumMB() , m_encparams.YNumMB() ,
m_encparams.XNumBlocks()/2 , m_encparams.YNumBlocks()/2, num_refs );
m_me_data_set[2] = &me_data;
// Set up the lambdas to use per block
m_me_data_set[0]->SetLambdaMap( 0 , me_data.LambdaMap() , 1.0/m_level_factor[0] );
m_me_data_set[1]->SetLambdaMap( 1 , me_data.LambdaMap() , 1.0/m_level_factor[1] );
// Set up the reference pictures
m_ref1_updata = &(my_buffer.GetUpComponent( ref1 , Y_COMP));
if (num_refs>1)
{
ref2 = refs[1];
m_ref2_updata = &(my_buffer.GetUpComponent( ref2 , Y_COMP));
// Create an object for computing bi-directional prediction calculations
if ( m_encparams.MVPrecision()==MV_PRECISION_EIGHTH_PIXEL )
m_bicheckdiff = new BiBlockEighthPel( *m_ref1_updata ,
*m_ref2_updata ,
*m_pic_data );
else if ( m_encparams.MVPrecision()==MV_PRECISION_QUARTER_PIXEL )
m_bicheckdiff = new BiBlockQuarterPel( *m_ref1_updata ,
*m_ref2_updata ,
*m_pic_data );
else
m_bicheckdiff = new BiBlockHalfPel( *m_ref1_updata ,
*m_ref2_updata ,
*m_pic_data );
}
else
{
ref2 = ref1;
}
// Create an object for doing intra calculations
m_intradiff = new IntraBlockDiff( *m_pic_data );
// Loop over all the macroblocks, doing the work //
///////////////////////////////////////////////////
for (m_ymb_loc=0 ; m_ymb_loc<m_encparams.YNumMB() ; ++m_ymb_loc )
{
for (m_xmb_loc=0 ; m_xmb_loc<m_encparams.XNumMB(); ++m_xmb_loc )
{
DoMBDecn();
}//m_xmb_loc
}//m_ymb_loc
delete m_intradiff;
if (num_refs>1)
delete m_bicheckdiff;
}
}