/*===========================================================================*
* iframe.c *
* *
* Procedures concerned with the I-frame encoding *
* *
* EXPORTED PROCEDURES: *
* GenIFrame *
* SetSlicesPerFrame *
* SetBlocksPerSlice *
* SetIQScale *
* GetIQScale *
* ResetIFrameStats *
* ShowIFrameSummary *
* EncodeYDC *
* EncodeCDC *
* time_elapsed *
* *
*===========================================================================*/
/*
* 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 FILES *
*==============*/
#include <time.h> /* Defines CLOCKS_PER_SEC, if this system has clock() */
#ifndef CLOCKS_PER_SEC
/* System doesn't have clock(); we assume it has times() instead */
#include <sys/times.h>
#endif
#include <sys/types.h>
#include <sys/param.h>
#include "all.h"
#include "mtypes.h"
#include "frames.h"
#include "prototypes.h"
#include "block.h"
#include "mpeg.h"
#include "param.h"
#include "mheaders.h"
#include "fsize.h"
#include "parallel.h"
#include "postdct.h"
#include "rate.h"
#include "specifics.h"
#include "opts.h"
#include "iframe.h"
/*==================*
* STATIC VARIABLES *
*==================*/
static int lastNumBits = 0;
static int lastIFrame = 0;
static int numBlocks = 0;
static int numBits;
static int numFrames = 0;
static int numFrameBits = 0;
static int32 totalTime = 0;
static float totalSNR = 0.0;
static float totalPSNR = 0.0;
static int lengths[256] = {
0, 1, 2, 2, 3, 3, 3, 3, /* 0 - 7 */
4, 4, 4, 4, 4, 4, 4, 4, /* 8 - 15 */
5, 5, 5, 5, 5, 5, 5, 5, /* 16 - 31 */
5, 5, 5, 5, 5, 5, 5, 5,
6, 6, 6, 6, 6, 6, 6, 6, /* 32 - 63 */
6, 6, 6, 6, 6, 6, 6, 6,
6, 6, 6, 6, 6, 6, 6, 6,
6, 6, 6, 6, 6, 6, 6, 6,
7, 7, 7, 7, 7, 7, 7, 7, /* 64 - 127 */
7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7,
8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8
};
/*==================*
* GLOBAL VARIABLES *
*==================*/
int qscaleI;
int slicesPerFrame;
int blocksPerSlice;
int fCodeI, fCodeP, fCodeB;
boolean printSNR = FALSE;
boolean printMSE = FALSE;
boolean decodeRefFrames = FALSE;
int TIME_RATE;
static int
SetFCodeHelper(int const SR) {
int range,fCode;
if ( pixelFullSearch ) {
range = SR;
} else {
range = SR*2;
}
if ( range < 256 ) {
if ( range < 64 ) {
if ( range < 32 ) {
fCode = 1;
} else {
fCode = 2;
}
} else {
if ( range < 128 ) {
fCode = 3;
} else {
fCode = 4;
}
}
} else {
if ( range < 1024 ) {
if ( range < 512 ) {
fCode = 5;
} else {
fCode = 6;
}
} else {
if ( range < 2048 ) {
fCode = 7;
} else {
fprintf(stderr, "ERROR: INVALID SEARCH RANGE!!!\n");
exit(1);
}
}
}
return fCode;
}
/*===========================================================================*
*
* SetFCode
*
* set the forward_f_code and backward_f_code according to the search
* range. Must be called AFTER pixelFullSearch and searchRange have
* been initialized. Irrelevant for I-frames, but computation is
* negligible (done only once, as well)
*
* RETURNS: nothing
*
* SIDE EFFECTS: fCodeI,fCodeP,fCodeB
*
*===========================================================================*/
void
SetFCode(void) {
fCodeI = SetFCodeHelper(1); /* GenIFrame ignores value */
fCodeP = SetFCodeHelper(searchRangeP);
fCodeB = SetFCodeHelper(searchRangeB);
}
/*===========================================================================*
*
* SetSlicesPerFrame
*
* set the number of slices per frame
*
* RETURNS: nothing
*
* SIDE EFFECTS: slicesPerFrame
*
*===========================================================================*/
void
SetSlicesPerFrame(int const number) {
slicesPerFrame = number;
}
/*===========================================================================*
*
* SetBlocksPerSlice
*
* set the number of blocks per slice, based on slicesPerFrame
*
* RETURNS: nothing
*
* SIDE EFFECTS: blocksPerSlice
*
*===========================================================================*/
void
SetBlocksPerSlice(void) {
int totalBlocks;
totalBlocks = (Fsize_y>>4)*(Fsize_x>>4);
if ( slicesPerFrame > totalBlocks ) {
blocksPerSlice = 1;
} else {
blocksPerSlice = totalBlocks/slicesPerFrame;
}
}
/*===========================================================================*
*
* SetIQScale
*
* set the I-frame Q-scale
*
* RETURNS: nothing
*
* SIDE EFFECTS: qscaleI
*
*===========================================================================*/
void
SetIQScale(int const qI) {
qscaleI = qI;
}
/*===========================================================================*
*
* GetIQScale
*
* Get the I-frame Q-scale
*
* RETURNS: the Iframe Qscale
*
* SIDE EFFECTS: none
*
*===========================================================================*/
int
GetIQScale(void) {
return qscaleI;
}
static void
CalcDistortion(MpegFrame * const current,
int const y,
int const x) {
int qscale, distort=0;
Block decblk;
FlatBlock fblk;
int datarate = 0;
for (qscale = 1; qscale < 32; qscale ++) {
distort = 0;
datarate = 0;
Mpost_QuantZigBlock(dct[y][x], fblk, qscale, TRUE);
Mpost_UnQuantZigBlock(fblk, decblk, qscale, TRUE);
if (collect_distortion_detailed) datarate += CalcRLEHuffLength(fblk);
mpeg_jrevdct((int16 *)decblk);
distort += mse(current->y_blocks[y][x], decblk);
Mpost_QuantZigBlock(dct[y][x+1], fblk, qscale, TRUE);
Mpost_UnQuantZigBlock(fblk, decblk, qscale, TRUE);
if (collect_distortion_detailed) datarate += CalcRLEHuffLength(fblk);
mpeg_jrevdct((int16 *)decblk);
distort += mse(current->y_blocks[y][x+1], decblk);
Mpost_QuantZigBlock(dct[y+1][x], fblk, qscale, TRUE);
Mpost_UnQuantZigBlock(fblk, decblk, qscale, TRUE);
if (collect_distortion_detailed) datarate += CalcRLEHuffLength(fblk);
mpeg_jrevdct((int16 *)decblk);
distort += mse(current->y_blocks[y+1][x], decblk);
Mpost_QuantZigBlock(dct[y+1][x+1], fblk, qscale, TRUE);
Mpost_UnQuantZigBlock(fblk, decblk, qscale, TRUE);
if (collect_distortion_detailed) datarate += CalcRLEHuffLength(fblk);
mpeg_jrevdct((int16 *)decblk);
distort += mse(current->y_blocks[y+1][x+1], decblk);
Mpost_QuantZigBlock(dctb[y >> 1][x >> 1], fblk, qscale, TRUE);
Mpost_UnQuantZigBlock(fblk, decblk, qscale, TRUE);
if (collect_distortion_detailed) datarate += CalcRLEHuffLength(fblk);
mpeg_jrevdct((int16 *)decblk);
distort += mse(current->cb_blocks[y>>1][x>>1], decblk);
Mpost_QuantZigBlock(dctr[y >> 1][x >> 1], fblk, qscale, TRUE);
Mpost_UnQuantZigBlock(fblk, decblk, qscale, TRUE);
if (collect_distortion_detailed) datarate += CalcRLEHuffLength(fblk);
mpeg_jrevdct((int16 *)decblk);
distort += mse(current->cr_blocks[y >> 1][x >> 1], decblk);
if (!collect_distortion_detailed) {
fprintf(distortion_fp, "\t%d\n", distort);
} else if (collect_distortion_detailed == 1) {
fprintf(distortion_fp, "\t%d\t%d\n", distort, datarate);
} else {
fprintf(fp_table_rate[qscale-1], "%d\n", datarate);
fprintf(fp_table_dist[qscale-1], "%d\n", distort);
}
}
}
/*===========================================================================*
*
* GenIFrame
*
* generate an I-frame; appends result to bb
*
* RETURNS: I-frame appended to bb
*
* SIDE EFFECTS: none
*
*===========================================================================*/
void
GenIFrame(BitBucket * const bb,
MpegFrame * const current) {
int x, y;
int index;
FlatBlock fb[6];
Block dec[6];
int32 y_dc_pred, cr_dc_pred, cb_dc_pred;
int totalBits;
int totalFrameBits;
int32 startTime, endTime;
float snr[3], psnr[3];
int mbAddress;
int QScale;
BlockMV *info; /* Not used in Iframes, but nice to pass in anyway */
int bitstreamMode, newQScale;
int rc_blockStart=0;
if (dct==NULL) AllocDctBlocks();
if (collect_quant) {fprintf(collect_quant_fp, "# I\n");}
/* set-up for statistics */
numFrames++;
totalFrameBits = bb->cumulativeBits;
if ( showBitRatePerFrame ) {
if ( lastNumBits == 0 ) {
lastNumBits = bb->cumulativeBits;
lastIFrame = current->id;
} else {
/* ASSUMES 30 FRAMES PER SECOND */
if (! realQuiet) {
fprintf(stdout, "I-to-I (frames %5d to %5d) bitrate: %8d\n",
lastIFrame, current->id-1,
((bb->cumulativeBits-lastNumBits)*30)/
(current->id-lastIFrame));
}
fprintf(bitRateFile, "I-to-I (frames %5d to %5d) bitrate: %8d\n",
lastIFrame, current->id-1,
((bb->cumulativeBits-lastNumBits)*30)/
(current->id-lastIFrame));
lastNumBits = bb->cumulativeBits;
lastIFrame = current->id;
}
}
startTime = time_elapsed();
Frame_AllocBlocks(current);
BlockifyFrame(current);
DBG_PRINT(("Generating iframe\n"));
QScale = GetIQScale();
/* Allocate bits for this frame for rate control purposes */
bitstreamMode = getRateMode();
if (bitstreamMode == FIXED_RATE) {
targetRateControl(current);
}
Mhead_GenPictureHeader(bb, I_FRAME, current->id, fCodeI);
/* Check for Qscale change */
if (specificsOn) {
newQScale = SpecLookup(current->id, 0, 0 /* junk */, &info, QScale);
if (newQScale != -1) {
QScale = newQScale;
}
/* check for slice */
newQScale = SpecLookup(current->id, 1, 1, &info, QScale);
if (newQScale != -1) {
QScale = newQScale;
}
}
Mhead_GenSliceHeader(bb, 1, QScale, NULL, 0);
if ( referenceFrame == DECODED_FRAME ) {
Frame_AllocDecoded(current, TRUE);
} else if ( printSNR ) {
Frame_AllocDecoded(current, FALSE);
}
y_dc_pred = cr_dc_pred = cb_dc_pred = 128;
totalBits = bb->cumulativeBits;
mbAddress = 0;
/* DCT the macroblocks */
for (y = 0; y < (Fsize_y >> 3); y += 2) {
for (x = 0; x < (Fsize_x >> 3); x += 2) {
if (collect_quant && (collect_quant_detailed & 1))
fprintf(collect_quant_fp, "l\n");
if (DoLaplace) {LaplaceCnum = 0;}
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");
if (DoLaplace) {LaplaceCnum = 1;}
mp_fwd_dct_block2(current->cb_blocks[y>>1][x>>1],
dctb[y>>1][x>>1]);
if (DoLaplace) {LaplaceCnum = 2;}
mp_fwd_dct_block2(current->cr_blocks[y>>1][x>>1],
dctr[y>>1][x>>1]);
}
}
if (DoLaplace)
CalcLambdas();
for (y = 0; y < (Fsize_y >> 3); y += 2) {
for (x = 0; x < (Fsize_x >> 3); x += 2) {
/* Check for Qscale change */
if (specificsOn) {
newQScale =
SpecLookup(current->id, 2, mbAddress, &info, QScale);
if (newQScale != -1) {
QScale = newQScale;
}
}
/* Determine if new Qscale needed for Rate Control purposes */
if (bitstreamMode == FIXED_RATE) {
rc_blockStart = bb->cumulativeBits;
newQScale = needQScaleChange(qscaleI,
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;
}
}
if ( (mbAddress % blocksPerSlice == 0) && (mbAddress != 0) ) {
/* create a new slice */
if (specificsOn) {
/* Make sure no slice Qscale change */
newQScale = SpecLookup(current->id, 1,
mbAddress/blocksPerSlice, &info,
QScale);
if (newQScale != -1) QScale = newQScale;
}
Mhead_GenSliceEnder(bb);
Mhead_GenSliceHeader(bb, 1+(y>>1), QScale, NULL, 0);
y_dc_pred = cr_dc_pred = cb_dc_pred = 128;
GEN_I_BLOCK(I_FRAME, current, bb, 1+(x>>1), QScale);
} else {
GEN_I_BLOCK(I_FRAME, current, bb, 1, QScale);
}
if (WriteDistortionNumbers) {
CalcDistortion(current, y, x);
}
if ( decodeRefFrames ) {
/* now, reverse the DCT transform */
LaplaceCnum = 0;
for ( index = 0; index < 6; index++ ) {
if (!DoLaplace) {
Mpost_UnQuantZigBlock(fb[index], dec[index], QScale,
TRUE);
} else {
if (index == 4) {LaplaceCnum = 1;}
if (index == 5) {LaplaceCnum = 2;}
Mpost_UnQuantZigBlockLaplace(fb[index], dec[index],
QScale, TRUE);
}
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);
}
numBlocks++;
mbAddress++;
/* Rate Control */
if (bitstreamMode == FIXED_RATE) {
incMacroBlockBits(bb->cumulativeBits - rc_blockStart);
rc_blockStart = bb->cumulativeBits;
MB_RateOut(TYPE_IFRAME);
}
}
}
if ( printSNR ) {
BlockComputeSNR(current,snr,psnr);
totalSNR += snr[0];
totalPSNR += psnr[0];
}
numBits += (bb->cumulativeBits-totalBits);
DBG_PRINT(("End of frame\n"));
Mhead_GenSliceEnder(bb);
/* Rate Control */
if (bitstreamMode == FIXED_RATE) {
updateRateControl(TYPE_IFRAME);
}
endTime = time_elapsed();
totalTime += (endTime-startTime);
numFrameBits += (bb->cumulativeBits-totalFrameBits);
if ( showBitRatePerFrame ) {
/* ASSUMES 30 FRAMES PER SECOND */
fprintf(bitRateFile, "%5d\t%8d\n", current->id,
30*(bb->cumulativeBits-totalFrameBits));
}
if ( frameSummary && !realQuiet ) {
/* ASSUMES 30 FRAMES PER SECOND */
fprintf(stdout,
"FRAME %d (I): %ld seconds (%d bits/s output)\n",
current->id, (long)((endTime-startTime)/TIME_RATE),
30*(bb->cumulativeBits-totalFrameBits));
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]);
}
}
}
/*===========================================================================*
*
* ResetIFrameStats
*
* reset the I-frame statistics
*
* RETURNS: nothing
*
* SIDE EFFECTS: none
*
*===========================================================================*/
void
ResetIFrameStats(void) {
numBlocks = 0;
numBits = 0;
numFrames = 0;
numFrameBits = 0;
totalTime = 0;
}
float
IFrameTotalTime(void) {
return (float)totalTime/(float)TIME_RATE;
}
void
ShowIFrameSummary(unsigned int const inputFrameBits,
unsigned int const totalBits,
FILE * const fpointer) {
/*----------------------------------------------------------------------------
Print out statistics on all I frames.
-----------------------------------------------------------------------------*/
if (numFrames > 0) {
fprintf(fpointer, "-------------------------\n");
fprintf(fpointer, "*****I FRAME SUMMARY*****\n");
fprintf(fpointer, "-------------------------\n");
fprintf(fpointer, " Blocks: %5d (%6d bits) (%5d bpb)\n",
numBlocks, numBits, numBits/numBlocks);
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)));
}
}
}
/*===========================================================================*
*
* EncodeYDC
*
* Encode the DC portion of a DCT of a luminance block
*
* RETURNS: result appended to bb
*
* SIDE EFFECTS: updates pred_term
*
*===========================================================================*/
void
EncodeYDC(int32 const dc_term,
int32 * const pred_term,
BitBucket * const bb) {
/* see Table B.5a -- MPEG-I doc */
static int codes[9] = {
0x4, 0x0, 0x1, 0x5, 0x6, 0xe, 0x1e, 0x3e, 0x7e
};
static int codeLengths[9] = {
3, 2, 2, 3, 3, 4, 5, 6, 7
};
int ydiff, ydiff_abs;
int length;
ydiff = (dc_term - (*pred_term));
if (ydiff > 255) {
#ifdef BLEAH
fprintf(stdout, "TRUNCATED\n");
#endif
ydiff = 255;
} else if (ydiff < -255) {
#ifdef BLEAH
fprintf(stdout, "TRUNCATED\n");
#endif
ydiff = -255;
}
ydiff_abs = ABS(ydiff);
length = lengths[ydiff_abs];
Bitio_Write(bb, codes[length], codeLengths[length]);
if ( length != 0 ) {
if ( ydiff > 0 ) {
Bitio_Write(bb, ydiff_abs, length);
} else {
Bitio_Write(bb, ~ydiff_abs, length);
}
}
(*pred_term) += ydiff;
}
/*===========================================================================*
*
* EncodeCDC
*
* Encode the DC portion of a DCT of a chrominance block
*
* RETURNS: result appended to bb
*
* SIDE EFFECTS: updates pred_term
*
*===========================================================================*/
void
EncodeCDC(int32 const dc_term,
int32 * const pred_term,
BitBucket * const bb) {
/* see Table B.5b -- MPEG-I doc */
static int codes[9] = {
0x0, 0x1, 0x2, 0x6, 0xe, 0x1e, 0x3e, 0x7e, 0xfe
};
static int codeLengths[9] = {
2, 2, 2, 3, 4, 5, 6, 7, 8
};
int cdiff, cdiff_abs;
int length;
cdiff = (dc_term - (*pred_term));
if (cdiff > 255) {
#ifdef BLEAH
fprintf(stdout, "TRUNCATED\n");
#endif
cdiff = 255;
} else if (cdiff < -255) {
#ifdef BLEAH
fprintf(stdout, "TRUNCATED\n");
#endif
cdiff = -255;
}
cdiff_abs = ABS(cdiff);
length = lengths[cdiff_abs];
Bitio_Write(bb, codes[length], codeLengths[length]);
if ( length != 0 ) {
if ( cdiff > 0 ) {
Bitio_Write(bb, cdiff_abs, length);
} else {
Bitio_Write(bb, ~cdiff_abs, length);
}
}
(*pred_term) += cdiff;
}
void
BlockComputeSNR(MpegFrame * const current,
float * const snr,
float * const psnr) {
int32 tempInt;
int y, x;
int32 varDiff[3];
double ratio[3];
double total[3];
uint8 **origY=current->orig_y, **origCr=current->orig_cr,
**origCb=current->orig_cb;
uint8 **newY=current->decoded_y, **newCr=current->decoded_cr,
**newCb=current->decoded_cb;
static int32 **SignalY, **NoiseY;
static int32 **SignalCb, **NoiseCb;
static int32 **SignalCr, **NoiseCr;
static short ySize[3], xSize[3];
static boolean needs_init=TRUE;
/* Init */
if (needs_init) {
int ysz = (Fsize_y>>3) * sizeof(int32 *);
int xsz = (Fsize_x>>3);
needs_init = FALSE;
for (y=0; y<3; y++) {
varDiff[y] = ratio[y] = total[y] = 0.0;
}
ySize[0]=Fsize_y; xSize[0]=Fsize_x;
ySize[1]=Fsize_y>>1; xSize[1]=Fsize_x>>1;
ySize[2]=Fsize_y>>1; xSize[2]=Fsize_x>>1;
SignalY = (int32 **) malloc(ysz);
NoiseY = (int32 **) malloc(ysz);
SignalCb = (int32 **) malloc(ysz);
NoiseCb = (int32 **) malloc(ysz);
SignalCr = (int32 **) malloc(ysz);
NoiseCr = (int32 **) malloc(ysz);
if (SignalY == NULL || NoiseY == NULL || SignalCr == NULL ||
NoiseCb == NULL || SignalCb == NULL || NoiseCr == NULL) {
fprintf(stderr, "Out of memory in BlockComputeSNR\n");
exit(-1);
}
for (y = 0; y < ySize[0]>>3; y++) {
SignalY[y] = (int32 *) calloc(xsz,4);
SignalCr[y] = (int32 *) calloc(xsz,4);
SignalCb[y] = (int32 *) calloc(xsz,4);
NoiseY[y] = (int32 *) calloc(xsz,4);
NoiseCr[y] = (int32 *) calloc(xsz,4);
NoiseCb[y] = (int32 *) calloc(xsz,4);
}
} else {
for (y = 0; y < ySize[0]>>3; y++) {
memset((char *) &NoiseY[y][0], 0, (xSize[0]>>3) * 4);
memset((char *) &SignalY[y][0], 0, (xSize[0]>>3) * 4);
memset((char *) &NoiseCb[y][0], 0, (xSize[0]>>3) * 4);
memset((char *) &NoiseCr[y][0], 0, (xSize[0]>>3) * 4);
memset((char *) &SignalCb[y][0], 0, (xSize[0]>>3) * 4);
memset((char *) &SignalCr[y][0], 0, (xSize[0]>>3) * 4);
}
}
/* find all the signal and noise */
for (y = 0; y < ySize[0]; y++) {
for (x = 0; x < xSize[0]; x++) {
tempInt = (origY[y][x] - newY[y][x]);
NoiseY[y>>4][x>>4] += tempInt*tempInt;
total[0] += (double)abs(tempInt);
tempInt = origY[y][x];
SignalY[y>>4][x>>4] += tempInt*tempInt;
}}
for (y = 0; y < ySize[1]; y++) {
for (x = 0; x < xSize[1]; x ++) {
tempInt = (origCb[y][x] - newCb[y][x]);
NoiseCb[y>>3][x>>3] += tempInt*tempInt;
total[1] += (double)abs(tempInt);
tempInt = origCb[y][x];
SignalCb[y>>3][x>>3] += tempInt*tempInt;
tempInt = (origCr[y][x]-newCr[y][x]);
NoiseCr[y>>3][x>>3] += tempInt*tempInt;
total[2] += (double)abs(tempInt);
tempInt = origCr[y][x];
SignalCr[y>>3][x>>3] += tempInt*tempInt;
}}
/* Now sum up that noise */
for(y=0; y<Fsize_y>>4; y++){
for(x=0; x<Fsize_x>>4; x++){
varDiff[0] += NoiseY[y][x];
varDiff[1] += NoiseCb[y][x];
varDiff[2] += NoiseCr[y][x];
if (printMSE) printf("%4d ",(int)(NoiseY[y][x]/256.0));
}
if (printMSE) puts("");
}
/* Now look at those ratios! */
for(y=0; y<Fsize_y>>4; y++){
for(x=0; x<Fsize_x>>4; x++){
ratio[0] += (double)SignalY[y][x]/(double)varDiff[0];
ratio[1] += (double)SignalCb[y][x]/(double)varDiff[1];
ratio[2] += (double)SignalCr[y][x]/(double)varDiff[2];
}}
for (x=0; x<3; x++) {
snr[x] = 10.0 * log10(ratio[x]);
psnr[x] = 20.0 * log10(255.0/sqrt((double)varDiff[x]/
(double)(ySize[x]*xSize[x])));
if (! realQuiet) {
fprintf(stdout, "Mean error[%1d]: %f\n",
x, total[x] / (double)(xSize[x] * ySize[x]));
}
}
}
void
WriteDecodedFrame(MpegFrame * const frame) {
FILE * fpointer;
char fileName[256];
int width, height;
int y;
/* need to save decoded frame to disk because it might be accessed
by another process */
width = Fsize_x;
height = Fsize_y;
sprintf(fileName, "%s.decoded.%d", outputFileName, frame->id);
if (!realQuiet) {
fprintf(stdout, "Outputting to %s\n", fileName);
fflush(stdout);
}
fpointer = fopen(fileName, "wb");
for ( y = 0; y < height; y++ ) {
fwrite(frame->decoded_y[y], 1, width, fpointer);
}
for (y = 0; y < (height >> 1); y++) { /* U */
fwrite(frame->decoded_cb[y], 1, width >> 1, fpointer);
}
for (y = 0; y < (height >> 1); y++) { /* V */
fwrite(frame->decoded_cr[y], 1, width >> 1, fpointer);
}
fflush(fpointer);
fclose(fpointer);
}
void
PrintItoIBitRate(int const numBits,
int const frameNum) {
if ( showBitRatePerFrame ) {
/* ASSUMES 30 FRAMES PER SECOND */
if (! realQuiet) {
fprintf(stdout, "I-to-I (frames %5d to %5d) bitrate: %8d\n",
lastIFrame, frameNum-1,
((numBits-lastNumBits)*30)/
(frameNum-lastIFrame));
}
fprintf(bitRateFile, "I-to-I (frames %5d to %5d) bitrate: %8d\n",
lastIFrame, frameNum-1,
((numBits-lastNumBits)*30)/
(frameNum-lastIFrame));
}
}
/*======================================================================*
*
* time_elapsed
*
* Handle different time systems on different machines
*
* RETURNS number of seconds process time used
*
*======================================================================*/
int32 time_elapsed(void) {
#ifdef CLOCKS_PER_SEC
/* ANSI C */
TIME_RATE = CLOCKS_PER_SEC;
return (int32) clock();
#else
struct tms timeBuffer;
TIME_RATE = 60;
times(&timeBuffer);
return timeBuffer.tms_utime + timeBuffer.tms_stime;
#endif
}