/*===========================================================================* * pframe.c * * Procedures concerned with generation of P-frames * * EXPORTED PROCEDURES: * GenPFrame * ResetPFrameStats * ShowPFrameSummary * EstimateSecondsPerPFrame * ComputeHalfPixelData * SetPQScale * GetPQScale * * NOTE: when motion vectors are passed as arguments, they are passed as * twice their value. In other words, a motion vector of (3,4) will * be passed as (6,8). This allows half-pixel motion vectors to be * passed as integers. This is true throughout the program. * *===========================================================================*/ /*==============* * HEADER FILES * *==============*/ #include #include #include "all.h" #include "mtypes.h" #include "bitio.h" #include "frames.h" #include "motion_search.h" #include "prototypes.h" #include "param.h" #include "mheaders.h" #include "fsize.h" #include "postdct.h" #include "mpeg.h" #include "parallel.h" #include "rate.h" #include "opts.h" /*==================* * STATIC VARIABLES * *==================*/ static int32 zeroDiff; static int numPIBlocks = 0; static int numPPBlocks = 0; static int numPSkipped = 0; static int numPIBits = 0; static int numPPBits = 0; static int numFrames = 0; static int numFrameBits = 0; static int32 totalTime = 0; static int qscaleP; static float totalSNR = 0.0; static float totalPSNR = 0.0; extern Block **dct, **dctr, **dctb; extern dct_data_type **dct_data; /*=====================* * INTERNAL PROCEDURES * *=====================*/ /*===========================================================================* * * USER-MODIFIABLE * * ZeroMotionBetter * * decide if (0,0) motion is better than the given motion vector * * RETURNS: TRUE if (0,0) is better, FALSE if (my,mx) is better * * SIDE EFFECTS: none * * PRECONDITIONS: The relevant block in 'current' is valid (it has not * been dct'd). 'zeroDiff' has already been computed * as the LumMotionError() with (0,0) motion * * NOTES: This procedure follows the algorithm described on * page D-48 of the MPEG-1 specification * *===========================================================================*/ static boolean ZeroMotionBetter(currentBlock, prev, by, bx, my, mx) LumBlock currentBlock; MpegFrame *prev; int by; int bx; int my; int mx; { int bestDiff; int CompareMode; /* Junk needed to adapt for TUNEing */ CompareMode = SearchCompareMode; SearchCompareMode = DEFAULT_SEARCH; bestDiff = LumMotionError(currentBlock, prev, by, bx, my, mx, 0x7fffffff); SearchCompareMode = CompareMode; if ( zeroDiff < 256*3 ) { if ( 2*bestDiff >= zeroDiff ) { return TRUE; } } else { if ( 11*bestDiff >= 10*zeroDiff ) { return TRUE; } } return FALSE; } /*===========================================================================* * * USER-MODIFIABLE * * DoIntraCode * * decide if intra coding is necessary * * RETURNS: TRUE if intra-block coding is better; FALSE if not * * SIDE EFFECTS: none * * PRECONDITIONS: The relevant block in 'current' is valid (it has not * been dct'd). * * NOTES: This procedure follows the algorithm described on * page D-49 of the MPEG-1 specification * *===========================================================================*/ static boolean DoIntraCode(currentBlock, prev, by, bx, motionY, motionX) LumBlock currentBlock; MpegFrame *prev; int by; int bx; int motionY; int motionX; { int x, y; int32 sum = 0, vard = 0, varc = 0, dif; int32 currPixel, prevPixel; LumBlock motionBlock; ComputeMotionLumBlock(prev, by, bx, motionY, motionX, motionBlock); for ( y = 0; y < 16; y++ ) { for ( x = 0; x < 16; x++ ) { currPixel = currentBlock[y][x]; prevPixel = motionBlock[y][x]; sum += currPixel; varc += currPixel*currPixel; dif = currPixel - prevPixel; vard += dif*dif; } } vard >>= 8; /* divide by 256; assumes mean is close to zero */ varc = (varc>>8) - (sum>>8)*(sum>>8); if ( vard <= 64 ) { return FALSE; } else if ( vard < varc ) { return FALSE; } else { return TRUE; } } /*===========================================================================* * * USER-MODIFIABLE * * ZeroMotionSufficient * * decide if zero motion is sufficient without DCT correction * * RETURNS: TRUE no DCT required; FALSE otherwise * * SIDE EFFECTS: none * * PRECONDITIONS: The relevant block in 'current' is raw YCC data * *===========================================================================*/ static boolean ZeroMotionSufficient(currentBlock, prev, by, bx) LumBlock currentBlock; MpegFrame *prev; int by; int bx; { LumBlock motionBlock; register int fy, fx; register int x, y; fy = by*DCTSIZE; fx = bx*DCTSIZE; for ( y = 0; y < 16; y++ ) { for ( x = 0; x < 16; x++ ) { motionBlock[y][x] = prev->ref_y[fy+y][fx+x]; } } zeroDiff = LumBlockMAD(currentBlock, motionBlock, 0x7fffffff); return (zeroDiff <= 256); } #ifdef UNUSED_PROCEDURES static void ComputeAndPrintPframeMAD(currentBlock, prev, by, bx, my, mbx, numBlock) LumBlock currentBlock; MpegFrame *prev; int by; int bx; int my; int mx; int numBlock; { LumBlock lumMotionBlock; int32 mad; ComputeMotionLumBlock(prev, by, bx, my, mx, lumMotionBlock); mad = LumBlockMAD(currentBlock, lumMotionBlock, 0x7fffffff); if (! realQuiet) { fprintf(stdout, "%d %d\n", numBlock, mad); } } #endif static void computeCurrentBlock(MpegFrame * const current, int const y, int const x, LumBlock currentBlock) { int fy, fx; int iy; BLOCK_TO_FRAME_COORD(y, x, fy, fx); for ( iy = 0; iy < 16; iy++ ) { int ix; for ( ix = 0; ix < 16; ix++ ) { currentBlock[iy][ix] = (int16)current->orig_y[fy+iy][fx+ix]; } } } static void computeMotionVectors(bool const specificsOn, bool const IntraPBAllowed, MpegFrame * const current, MpegFrame * const prev, int const mbAddress, BlockMV ** const infoP, int const QScale, LumBlock currentBlock, int const y, int const x, bool * const useMotionP, int * const motionYP, int * const motionXP) { bool useCached; BlockMV * info; /* See if we have a cached answer */ if (specificsOn) { SpecLookup(current->id, 2, mbAddress, &info, QScale); if (info != (BlockMV*)NULL) useCached = TRUE; else useCached = FALSE; } else useCached = FALSE; if (useCached) { if (info->typ == TYP_SKIP) { *motionXP = *motionYP = 0; *useMotionP = TRUE; } else { /* assume P, since we're a P frame.... */ *motionXP = info->fx; *motionYP = info->fy; *useMotionP = TRUE; } } else { /* see if we should use motion vectors, and if so, what those * vectors should be */ if (ZeroMotionSufficient(currentBlock, prev, y, x)) { *motionXP = 0; *motionYP = 0; *useMotionP = TRUE; } else { int motionY, motionX; motionY = 0; motionX = 0; /* initial values */ PMotionSearch(currentBlock, prev, y, x, &motionY, &motionX); if (ZeroMotionBetter(currentBlock, prev, y, x, motionY, motionX)) { *motionYP = 0; *motionXP = 0; } else { *motionYP = motionY; *motionXP = motionX; } if (IntraPBAllowed) *useMotionP = (! DoIntraCode(currentBlock, prev, y, x, motionY, motionX)); else *useMotionP = TRUE; } } *infoP = info; } static void calculateForwardDcts(MpegFrame * const current, int const y, int const x, Block ** const dct) { /* calculate forward dct's */ if (collect_quant && (collect_quant_detailed & 1)) fprintf(collect_quant_fp, "l\n"); mp_fwd_dct_block2(current->y_blocks[y][x], dct[y][x]); mp_fwd_dct_block2(current->y_blocks[y][x+1], dct[y][x+1]); mp_fwd_dct_block2(current->y_blocks[y+1][x], dct[y+1][x]); mp_fwd_dct_block2(current->y_blocks[y+1][x+1], dct[y+1][x+1]); if (collect_quant && (collect_quant_detailed & 1)) fprintf(collect_quant_fp, "c\n"); mp_fwd_dct_block2(current->cb_blocks[y>>1][x>>1], dctb[y>>1][x>>1]); mp_fwd_dct_block2(current->cr_blocks[y>>1][x>>1], dctr[y>>1][x>>1]); } static void computeMotionAndDct(int const lastBlockY, int const lastBlockX, bool const specificsOn, bool const IntraPBAllowed, MpegFrame * const current, MpegFrame * const prev, BlockMV ** const infoP, int const QScale, int const searchRangeP, Block ** const dct, int * const numPBlocksP, int * const numIBlocksP, int ** const pmvHistogram) { /*---------------------------------------------------------------------------- Loop through the frame finding motion/not and DCTing -----------------------------------------------------------------------------*/ int mbAddress; int y; mbAddress = 0; for (y = 0; y < lastBlockY; y += 2) { int x; for (x = 0; x < lastBlockX; x += 2) { LumBlock currentBlock; int motionY, motionX; bool useMotion; computeCurrentBlock(current, y, x, currentBlock); computeMotionVectors(specificsOn, IntraPBAllowed, current, prev, mbAddress, infoP, QScale, currentBlock, y, x, &useMotion, &motionY, &motionX); dct_data[y][x].useMotion = useMotion; if (useMotion) { int pattern; (*numPBlocksP)++; pattern = 63; ComputeDiffDCTs(current, prev, y, x, motionY, motionX, &pattern); assert(motionX+searchRangeP+1 >= 0); assert(motionY+searchRangeP+1 >= 0); if ( computeMVHist ) { assert(motionX+searchRangeP+1 <= 2*searchRangeP+2); assert(motionY+searchRangeP+1 <= 2*searchRangeP+2); pmvHistogram[motionX+searchRangeP+1] [motionY+searchRangeP+1]++; } /* Save specs for next loops */ dct_data[y][x].pattern = pattern; dct_data[y][x].fmotionX = motionX; dct_data[y][x].fmotionY = motionY; } else { /* output I-block inside a P-frame */ (*numIBlocksP)++; calculateForwardDcts(current, y, x, dct); } mbAddress++; } } } /*=====================* * EXPORTED PROCEDURES * *=====================*/ /*===========================================================================* * * GenPFrame * * generate a P-frame from previous frame, adding the result to the * given bit bucket * * RETURNS: frame appended to bb * *===========================================================================*/ void GenPFrame(BitBucket * const bb, MpegFrame * const current, MpegFrame * const prev) { extern int **pmvHistogram; FlatBlock fba[6], fb[6]; Block dec[6]; int32 y_dc_pred, cr_dc_pred, cb_dc_pred; int x, y; int motionX, motionY; int oldMotionX = 0, oldMotionY = 0; int offsetX, offsetY; int tempX, tempY; int motionXrem, motionXquot; int motionYrem, motionYquot; int pattern; int mbAddrInc = 1; int numIBlocks = 0; int numPBlocks = 0; int numSkipped = 0; int numIBits = 0; int numPBits = 0; int totalBits; int totalFrameBits; int32 startTime, endTime; int lastBlockX, lastBlockY; int lastX, lastY; int mbAddress; int slicePos; register int index; float snr[3], psnr[3]; int QScale; BlockMV *info; int bitstreamMode, newQScale; int rc_blockStart = 0; boolean overflowChange = FALSE; int overflowValue = 0; if (collect_quant) {fprintf(collect_quant_fp, "# P\n");} if (dct==NULL) AllocDctBlocks(); numFrames++; totalFrameBits = bb->cumulativeBits; startTime = time_elapsed(); DBG_PRINT(("Generating pframe\n")); QScale = GetPQScale(); /* bit allocation for rate control purposes */ bitstreamMode = getRateMode(); if (bitstreamMode == FIXED_RATE) { targetRateControl(current); } Mhead_GenPictureHeader(bb, P_FRAME, current->id, fCodeP); /* Check for Qscale change */ if (specificsOn) { /* Set a Qscale for this frame? */ newQScale = SpecLookup(current->id, 0, 0 /* junk */, &info /*junk*/, QScale); if (newQScale != -1) { QScale = newQScale; } /* Set for slice? */ newQScale = SpecLookup(current->id, 1, 1, &info /*junk*/, QScale); if (newQScale != -1) { QScale = newQScale; } } DBG_PRINT(("Slice Header\n")); Mhead_GenSliceHeader(bb, 1, QScale, NULL, 0); if ( referenceFrame == DECODED_FRAME ) { Frame_AllocDecoded(current, TRUE); } else if ( printSNR ) { Frame_AllocDecoded(current, FALSE); } /* don't do dct on blocks yet */ Frame_AllocBlocks(current); BlockifyFrame(current); /* for I-blocks */ y_dc_pred = cr_dc_pred = cb_dc_pred = 128; totalBits = bb->cumulativeBits; if ( (! pixelFullSearch) && (! prev->halfComputed) ) { ComputeHalfPixelData(prev); } lastBlockX = Fsize_x>>3; lastBlockY = Fsize_y>>3; lastX = lastBlockX-2; lastY = lastBlockY-2; computeMotionAndDct(lastBlockY, lastBlockX, specificsOn, IntraPBAllowed, current, prev, &info, QScale, searchRangeP, dct, &numPBlocks, &numIBlocks, pmvHistogram); mbAddress = 0; for (y = 0; y < lastBlockY; y += 2) { for (x = 0; x < lastBlockX; x += 2) { slicePos = (mbAddress % blocksPerSlice); if ( (slicePos == 0) && (mbAddress != 0) ) { if (specificsOn) { /* Make sure no slice Qscale change */ newQScale = SpecLookup(current->id, 1, mbAddress/blocksPerSlice, &info /*junk*/, QScale); if (newQScale != -1) QScale = newQScale; } Mhead_GenSliceEnder(bb); Mhead_GenSliceHeader(bb, 1+(y>>1), QScale, NULL, 0); /* reset everything */ oldMotionX = 0; oldMotionY = 0; y_dc_pred = cr_dc_pred = cb_dc_pred = 128; mbAddrInc = 1+(x>>1); } /* Determine if new Qscale needed for Rate Control purposes */ if (bitstreamMode == FIXED_RATE) { rc_blockStart = bb->cumulativeBits; newQScale = needQScaleChange(qscaleP, current->y_blocks[y][x], current->y_blocks[y][x+1], current->y_blocks[y+1][x], current->y_blocks[y+1][x+1]); if (newQScale > 0) { QScale = newQScale; } } /* Check for Qscale change */ if (specificsOn) { newQScale = SpecLookup(current->id, 2, mbAddress, &info, QScale); if (newQScale != -1) { QScale = newQScale; } } if (! dct_data[y][x].useMotion) { GEN_I_BLOCK(P_FRAME, current, bb, mbAddrInc, QScale); mbAddrInc = 1; numIBits += (bb->cumulativeBits-totalBits); totalBits = bb->cumulativeBits; /* reset because intra-coded */ oldMotionX = 0; oldMotionY = 0; if ( decodeRefFrames ) { /* need to decode block we just encoded */ Mpost_UnQuantZigBlock(fb[0], dec[0], QScale, TRUE); Mpost_UnQuantZigBlock(fb[1], dec[1], QScale, TRUE); Mpost_UnQuantZigBlock(fb[2], dec[2], QScale, TRUE); Mpost_UnQuantZigBlock(fb[3], dec[3], QScale, TRUE); Mpost_UnQuantZigBlock(fb[4], dec[4], QScale, TRUE); Mpost_UnQuantZigBlock(fb[5], dec[5], QScale, TRUE); /* now, reverse the DCT transform */ for ( index = 0; index < 6; index++ ) { mpeg_jrevdct((int16 *)dec[index]); } /* now, unblockify */ BlockToData(current->decoded_y, dec[0], y, x); BlockToData(current->decoded_y, dec[1], y, x+1); BlockToData(current->decoded_y, dec[2], y+1, x); BlockToData(current->decoded_y, dec[3], y+1, x+1); BlockToData(current->decoded_cb, dec[4], y>>1, x>>1); BlockToData(current->decoded_cr, dec[5], y>>1, x>>1); } } else { int fCode = fCodeP; /* reset because non-intra-coded */ y_dc_pred = cr_dc_pred = cb_dc_pred = 128; pattern = dct_data[y][x].pattern; motionX = dct_data[y][x].fmotionX; motionY = dct_data[y][x].fmotionY; #ifdef BLEAH ComputeAndPrintPframeMAD(currentBlock, prev, y, x, motionY, motionX, mbAddress); #endif if ( pixelFullSearch ) { /* should be even */ motionY /= 2; motionX /= 2; } /* transform the motion vector into the appropriate values */ offsetX = motionX - oldMotionX; offsetY = motionY - oldMotionY; /* if ((offsetX+(8*x)) >= (Fsize_x-8)) log(10.0); */ ENCODE_MOTION_VECTOR(offsetX, offsetY, motionXquot, motionYquot, motionXrem, motionYrem, FORW_F); #ifdef BLEAH if ( (motionX != 0) || (motionY != 0) ) { fprintf(stdout, "FRAME (y, x) %d, %d (block %d)\n", y, x, mbAddress); fprintf(stdout, "motionX = %d, motionY = %d\n", motionX, motionY); fprintf(stdout, " mxq, mxr = %d, %d myq, myr = %d, %d\n", motionXquot, motionXrem, motionYquot, motionYrem); } #endif oldMotionX = motionX; oldMotionY = motionY; if ( pixelFullSearch ) { /* reset for use with PMotionSearch */ motionY *= 2; motionX *= 2; } calc_blocks: /* create flat blocks and update pattern if necessary */ /* Note DoQuant references QScale, overflowChange, overflowValue, pattern, and the calc_blocks label */ DoQuant(0x20, dct[y][x], fba[0]); DoQuant(0x10, dct[y][x+1], fba[1]); DoQuant(0x08, dct[y+1][x], fba[2]); DoQuant(0x04, dct[y+1][x+1], fba[3]); DoQuant(0x02, dctb[y>>1][x>>1], fba[4]); DoQuant(0x01, dctr[y>>1][x>>1], fba[5]); if ( decodeRefFrames) { for ( index = 0; index < 6; index++ ) { if ( pattern & (1 << (5-index))) { Mpost_UnQuantZigBlock(fba[index], dec[index], QScale, FALSE); mpeg_jrevdct((int16 *)dec[index]); } else { memset((char *)dec[index], 0, sizeof(Block)); } } /* now add the motion block */ AddMotionBlock(dec[0], prev->decoded_y, y, x, motionY, motionX); AddMotionBlock(dec[1], prev->decoded_y, y, x+1, motionY, motionX); AddMotionBlock(dec[2], prev->decoded_y, y+1, x, motionY, motionX); AddMotionBlock(dec[3], prev->decoded_y, y+1, x+1, motionY, motionX); AddMotionBlock(dec[4], prev->decoded_cb, y>>1, x>>1, motionY/2, motionX/2); AddMotionBlock(dec[5], prev->decoded_cr, y>>1, x>>1, motionY/2, motionX/2); /* now, unblockify */ BlockToData(current->decoded_y, dec[0], y, x); BlockToData(current->decoded_y, dec[1], y, x+1); BlockToData(current->decoded_y, dec[2], y+1, x); BlockToData(current->decoded_y, dec[3], y+1, x+1); BlockToData(current->decoded_cb, dec[4], y>>1, x>>1); BlockToData(current->decoded_cr, dec[5], y>>1, x>>1); } if ( (motionX == 0) && (motionY == 0) ) { if ( pattern == 0 ) { /* can only skip if: * 1) not the last block in frame * 2) not the last block in slice * 3) not the first block in slice */ if ( ((y < lastY) || (x < lastX)) && (slicePos+1 != blocksPerSlice) && (slicePos != 0) ) { mbAddrInc++; /* skipped macroblock */ numSkipped++; numPBlocks--; } else { /* first/last macroblock */ Mhead_GenMBHeader(bb, 2 /* pict_code_type */, mbAddrInc /* addr_incr */, QScale /* q_scale */, fCode /* forw_f_code */, 1 /* back_f_code */, motionXrem /* horiz_forw_r */, motionYrem /* vert_forw_r */, 0 /* horiz_back_r */, 0 /* vert_back_r */, 1 /* motion_forw */, motionXquot /* m_horiz_forw */, motionYquot /* m_vert_forw */, 0 /* motion_back */, 0 /* m_horiz_back */, 0 /* m_vert_back */, 0 /* mb_pattern */, 0 /* mb_intra */); mbAddrInc = 1; } } else { DBG_PRINT(("MB Header(%d,%d)\n", x, y)); Mhead_GenMBHeader(bb, 2 /* pict_code_type */, mbAddrInc /* addr_incr */, QScale /* q_scale */, fCode /* forw_f_code */, 1 /* 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 */, pattern /* mb_pattern */, 0 /* mb_intra */); mbAddrInc = 1; } } else { /* DBG_PRINT(("MB Header(%d,%d)\n", x, y)); */ Mhead_GenMBHeader(bb, 2 /* pict_code_type */, mbAddrInc /* addr_incr */, QScale /* q_scale */, fCode /* forw_f_code */, 1 /* back_f_code */, motionXrem /* horiz_forw_r */, motionYrem /* vert_forw_r */, 0 /* horiz_back_r */, 0 /* vert_back_r */, 1 /* motion_forw */, motionXquot /* m_horiz_forw */, motionYquot /* m_vert_forw */, 0 /* motion_back */, 0 /* m_horiz_back */, 0 /* m_vert_back */, pattern /* mb_pattern */, 0 /* mb_intra */); mbAddrInc = 1; } /* now output the difference */ for ( tempX = 0; tempX < 6; tempX++ ) { if ( GET_ITH_BIT(pattern, 5-tempX) ) { Mpost_RLEHuffPBlock(fba[tempX], bb); } } numPBits += (bb->cumulativeBits-totalBits); totalBits = bb->cumulativeBits; } if (overflowChange) { /* undo an overflow-caused Qscale change */ overflowChange = FALSE; QScale -= overflowValue; overflowValue = 0; } mbAddress++; /* Rate Control */ if (bitstreamMode == FIXED_RATE) { incMacroBlockBits( bb->cumulativeBits- rc_blockStart); rc_blockStart = bb->cumulativeBits; MB_RateOut(TYPE_PFRAME); } } } if ( printSNR ) { BlockComputeSNR(current,snr,psnr); totalSNR += snr[0]; totalPSNR += psnr[0]; } #ifdef BLEAHBLEAH { FILE *filePtr; filePtr = fopen("PFRAME.yuv", "wb"); for ( y = 0; y < Fsize_y; y++ ) { for ( x = 0; x < Fsize_x; x++ ) fprintf(filePtr, "%d ", current->decoded_y[y][x]); fprintf(filePtr, "\n"); } fclose(filePtr); } #endif Mhead_GenSliceEnder(bb); /* Rate Control */ if (bitstreamMode == FIXED_RATE) { updateRateControl(TYPE_PFRAME); } /* UPDATE STATISTICS */ endTime = time_elapsed(); totalTime += (endTime-startTime); if ( ( ! childProcess) && showBitRatePerFrame ) { /* ASSUMES 30 FRAMES PER SECOND */ fprintf(bitRateFile, "%5d\t%8d\n", current->id, 30*(bb->cumulativeBits-totalFrameBits)); } if ( (! childProcess) && frameSummary && (! realQuiet) ) { fprintf(stdout, "FRAME %d (P): I BLOCKS: %d; " "P BLOCKS: %d SKIPPED: %d (%ld seconds)\n", current->id, numIBlocks, numPBlocks, numSkipped, (long)(endTime-startTime)/TIME_RATE); if ( printSNR ) { fprintf(stdout, "FRAME %d: SNR: %.1f\t%.1f\t%.1f\t" "PSNR: %.1f\t%.1f\t%.1f\n", current->id, snr[0], snr[1], snr[2], psnr[0], psnr[1], psnr[2]); } } numFrameBits += (bb->cumulativeBits-totalFrameBits); numPIBlocks += numIBlocks; numPPBlocks += numPBlocks; numPSkipped += numSkipped; numPIBits += numIBits; numPPBits += numPBits; if ( (referenceFrame == DECODED_FRAME) && NonLocalRefFrame(current->id) ) { if ( remoteIO ) { SendDecodedFrame(current); } else { WriteDecodedFrame(current); } NotifyDecodeServerReady(current->id); } } /*===========================================================================* * * ResetPFrameStats * * reset the P-frame statistics * * RETURNS: nothing * * SIDE EFFECTS: none * *===========================================================================*/ void ResetPFrameStats() { numPIBlocks = 0; numPPBlocks = 0; numPSkipped = 0; numPIBits = 0; numPPBits = 0; numFrames = 0; numFrameBits = 0; totalTime = 0; } /*===========================================================================* * * SetPQScale * * set the P-frame Q-scale * * RETURNS: nothing * * SIDE EFFECTS: qscaleP * *===========================================================================*/ void SetPQScale(qP) int qP; { qscaleP = qP; } /*===========================================================================* * * GetPQScale * * return the P-frame Q-scale * * RETURNS: the P-frame Q-scale * * SIDE EFFECTS: none * *===========================================================================*/ int GetPQScale() { return qscaleP; } /*===========================================================================* * * ShowPFrameSummary * * print a summary of information on encoding P-frames * * RETURNS: time taken for P-frames (in seconds) * * SIDE EFFECTS: none * *===========================================================================*/ float ShowPFrameSummary(inputFrameBits, totalBits, fpointer) int inputFrameBits; int32 totalBits; FILE *fpointer; { if ( numFrames == 0 ) { return 0.0; } fprintf(fpointer, "-------------------------\n"); fprintf(fpointer, "*****P FRAME SUMMARY*****\n"); fprintf(fpointer, "-------------------------\n"); if ( numPIBlocks != 0 ) { fprintf(fpointer, " I Blocks: %5d (%6d bits) (%5d bpb)\n", numPIBlocks, numPIBits, numPIBits/numPIBlocks); } else { fprintf(fpointer, " I Blocks: %5d\n", 0); } if ( numPPBlocks != 0 ) { fprintf(fpointer, " P Blocks: %5d (%6d bits) (%5d bpb)\n", numPPBlocks, numPPBits, numPPBits/numPPBlocks); } else { fprintf(fpointer, " P Blocks: %5d\n", 0); } fprintf(fpointer, " Skipped: %5d\n", numPSkipped); fprintf(fpointer, " Frames: %5d (%6d bits) (%5d bpf) (%2.1f%% of total)\n", numFrames, numFrameBits, numFrameBits/numFrames, 100.0*(float)numFrameBits/(float)totalBits); fprintf(fpointer, " Compression: %3d:1 (%9.4f bpp)\n", numFrames*inputFrameBits/numFrameBits, 24.0*(float)numFrameBits/(float)(numFrames*inputFrameBits)); if ( printSNR ) fprintf(fpointer, " Avg Y SNR/PSNR: %.1f %.1f\n", totalSNR/(float)numFrames, totalPSNR/(float)numFrames); if ( totalTime == 0 ) { fprintf(fpointer, " Seconds: NONE\n"); } else { fprintf(fpointer, " Seconds: %9ld (%9.4f fps) (%9ld pps) (%9ld mps)\n", (long)(totalTime/TIME_RATE), (float)((float)(TIME_RATE*numFrames)/(float)totalTime), (long)((float)TIME_RATE*(float)numFrames*(float)inputFrameBits/(24.0*(float)totalTime)), (long)((float)TIME_RATE*(float)numFrames*(float)inputFrameBits/(256.0*24.0*(float)totalTime))); } return (float)totalTime/(float)TIME_RATE; } /*===========================================================================* * * EstimateSecondsPerPFrame * * compute an estimate of the number of seconds required per P-frame * * RETURNS: the estimate, in seconds * * SIDE EFFECTS: none * *===========================================================================*/ float EstimateSecondsPerPFrame() { if ( numFrames == 0 ) { return 10.0; } else { return (float)totalTime/((float)TIME_RATE*(float)numFrames); } } /*===========================================================================* * * ComputeHalfPixelData * * compute all half-pixel data required for half-pixel motion vector * search (luminance only) * * RETURNS: frame->halfX, ->halfY, and ->halfBoth modified * * SIDE EFFECTS: none * *===========================================================================*/ void ComputeHalfPixelData(frame) MpegFrame *frame; { register int x, y; /* we add 1 before dividing by 2 because .5 is supposed to be rounded up * (see MPEG-1, page D-31) */ if ( frame->halfX == NULL ) { /* need to allocate memory */ Frame_AllocHalf(frame); } /* compute halfX */ for ( y = 0; y < Fsize_y; y++ ) { for ( x = 0; x < Fsize_x-1; x++ ) { frame->halfX[y][x] = (frame->ref_y[y][x]+ frame->ref_y[y][x+1]+1)>>1; } } /* compute halfY */ for ( y = 0; y < Fsize_y-1; y++ ) { for ( x = 0; x < Fsize_x; x++ ) { frame->halfY[y][x] = (frame->ref_y[y][x]+ frame->ref_y[y+1][x]+1)>>1; } } /* compute halfBoth */ for ( y = 0; y < Fsize_y-1; y++ ) { for ( x = 0; x < Fsize_x-1; x++ ) { frame->halfBoth[y][x] = (frame->ref_y[y][x]+ frame->ref_y[y][x+1]+ frame->ref_y[y+1][x]+ frame->ref_y[y+1][x+1]+2)>>2; } } frame->halfComputed = TRUE; } /* * Copyright (c) 1995 The Regents of the University of California. * All rights reserved. * * Permission to use, copy, modify, and distribute this software and its * documentation for any purpose, without fee, and without written agreement is * hereby granted, provided that the above copyright notice and the following * two paragraphs appear in all copies of this software. * * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. */ /* * $Header: /n/picasso/project/mpeg/mpeg_dist/mpeg_encode/RCS/pframe.c,v 1.22 1995/08/07 21:51:23 smoot Exp $ * $Log: pframe.c,v $ * Revision 1.22 1995/08/07 21:51:23 smoot * fixed LumMotionError call, simpler now with option type * * Revision 1.21 1995/06/21 22:23:16 smoot * fixed specifics file bug * generalized timeing stuff * binary writes * TUNEing stuff * * Revision 1.20 1995/04/14 23:07:41 smoot * reorganized to ease rate control experimentation * * Revision 1.19 1995/02/24 23:49:27 smoot * added specifications file format 2 * * Revision 1.18 1995/02/01 21:48:17 smoot * cleanup * * Revision 1.17 1995/01/23 06:30:01 darryl * fixed bug in "MMB Type "pattern" and Rate control * * Revision 1.15 1995/01/19 23:49:28 smoot * moved rev_dct, make pattern changable by ComputeDiffDCTs * * Revision 1.14 1995/01/19 23:09:07 eyhung * Changed copyrights * * Revision 1.13 1995/01/19 23:00:26 smoot * Fixed 1st/last MB in slice color bug in P-frames * * Revision 1.12 1995/01/17 22:10:27 smoot * Fixed B/P Qscale bug * * Revision 1.11 1995/01/16 08:14:41 eyhung * added realQuiet * * Revision 1.10 1994/12/07 00:40:36 smoot * Added seperate P and B search ranges * * Revision 1.9 1994/11/14 22:38:18 smoot * merged specifics and rate control * * Revision 1.8 1994/11/01 05:01:09 darryl * with rate control changes added * * Revision 2.1 1994/10/31 00:05:39 darryl * version before, hopefully, final changes * * Revision 2.0 1994/10/24 02:38:26 darryl * will be adding the experiment code * * Revision 1.1 1994/09/27 00:15:44 darryl * Initial revision * * Revision 1.7 1994/03/15 00:27:11 keving * nothing * * Revision 1.6 1993/12/22 19:19:01 keving * nothing * * Revision 1.5 1993/07/22 22:23:43 keving * nothing * * Revision 1.4 1993/06/30 20:06:09 keving * nothing * * Revision 1.3 1993/06/03 21:08:08 keving * nothing * * Revision 1.2 1993/03/02 23:03:42 keving * nothing * * Revision 1.1 1993/02/19 19:14:12 keving * nothing * */