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#ifndef IFRAME_H_INCLUDED
#define IFRAME_H_INCLUDED
#include "frame.h"
void
SetFCode(void);
void
SetSlicesPerFrame(int const number);
void
SetBlocksPerSlice(void);
void
SetIQScale(int const qI);
int
GetIQScale(void);
void
GenIFrame(BitBucket * const bb,
MpegFrame * const current);
void
ResetIFrameStats(void);
float
IFrameTotalTime(void);
void
ShowIFrameSummary(unsigned int const inputFrameBits,
unsigned int const totalBits,
FILE * const fpointer);
void
EncodeYDC(int32 const dc_term,
int32 * const pred_term,
BitBucket * const bb);
void
EncodeCDC(int32 const dc_term,
int32 * const pred_term,
BitBucket * const bb);
void
BlockComputeSNR(MpegFrame * const current,
float * const snr,
float * const psnr);
void
WriteDecodedFrame(MpegFrame * const frame);
void
PrintItoIBitRate(int const numBits,
int const frameNum);
int32 time_elapsed(void);
/* assumes many things:
* block indices are (y,x)
* variables y_dc_pred, cr_dc_pred, and cb_dc_pred
* flat block fb exists
*/
#define GEN_I_BLOCK(frameType, frame, bb, mbAI, qscale) { \
boolean overflow, overflowChange=FALSE; \
int overflowValue = 0; \
do { \
overflow = Mpost_QuantZigBlock(dct[y][x], fb[0], \
qscale, TRUE)==MPOST_OVERFLOW; \
overflow |= Mpost_QuantZigBlock(dct[y][x+1], fb[1], \
qscale, TRUE)==MPOST_OVERFLOW; \
overflow |= Mpost_QuantZigBlock(dct[y+1][x], fb[2], \
qscale, TRUE)==MPOST_OVERFLOW; \
overflow |= Mpost_QuantZigBlock(dct[y+1][x+1], fb[3], \
qscale, TRUE)==MPOST_OVERFLOW; \
overflow |= Mpost_QuantZigBlock(dctb[y >> 1][x >> 1], \
fb[4], qscale, TRUE)==MPOST_OVERFLOW; \
overflow |= Mpost_QuantZigBlock(dctr[y >> 1][x >> 1], \
fb[5], qscale, TRUE)==MPOST_OVERFLOW; \
if ((overflow) && (qscale!=31)) { \
overflowChange = TRUE; overflowValue++; \
qscale++; \
} else overflow = FALSE; \
} while (overflow); \
Mhead_GenMBHeader(bb, \
frameType /* pict_code_type */, mbAI /* addr_incr */, \
qscale /* q_scale */, \
0 /* forw_f_code */, 0 /* back_f_code */, \
0 /* horiz_forw_r */, 0 /* vert_forw_r */, \
0 /* horiz_back_r */, 0 /* vert_back_r */, \
0 /* motion_forw */, 0 /* m_horiz_forw */, \
0 /* m_vert_forw */, 0 /* motion_back */, \
0 /* m_horiz_back */, 0 /* m_vert_back */, \
0 /* mb_pattern */, TRUE /* mb_intra */); \
\
/* Y blocks */ \
EncodeYDC(fb[0][0], &y_dc_pred, bb); \
Mpost_RLEHuffIBlock(fb[0], bb); \
EncodeYDC(fb[1][0], &y_dc_pred, bb); \
Mpost_RLEHuffIBlock(fb[1], bb); \
EncodeYDC(fb[2][0], &y_dc_pred, bb); \
Mpost_RLEHuffIBlock(fb[2], bb); \
EncodeYDC(fb[3][0], &y_dc_pred, bb); \
Mpost_RLEHuffIBlock(fb[3], bb); \
\
/* CB block */ \
EncodeCDC(fb[4][0], &cb_dc_pred, bb); \
Mpost_RLEHuffIBlock(fb[4], bb); \
\
/* CR block */ \
EncodeCDC(fb[5][0], &cr_dc_pred, bb); \
Mpost_RLEHuffIBlock(fb[5], bb); \
if (overflowChange) qscale -= overflowValue; \
}
#endif
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