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00051 #include <sys/times.h>
00052 #include "all.h"
00053 #include "mtypes.h"
00054 #include "bitio.h"
00055 #include "frames.h"
00056 #include "prototypes.h"
00057 #include "param.h"
00058 #include "mheaders.h"
00059 #include "fsize.h"
00060 #include "postdct.h"
00061 #include "mpeg.h"
00062 #include "parallel.h"
00063 #include "dct.h"
00064 #include "rate.h"
00065
00066
00067
00068
00069
00070
00071 #define MAX_BIT_RATE 104857600
00072 #define MAX_BUFFER_SIZE 16760832
00073 #define DEFAULT_BUFFER_SIZE 327680
00074 #define DEFAULT_VBV_FULLNESS 3
00075 #define DEFAULT_PICT_RATE_CODE 5
00076 #define DEFAULT_PICT_RATE 30
00077 #define MAX_VBV_DELAY 32768
00078
00079
00080
00081
00082 static int RateControlMode = VARIABLE_RATE;
00083 static int32 buffer_size = DEFAULT_BUFFER_SIZE;
00084 static int32 bit_rate = -1;
00085
00086
00087
00088 static int32 VBV_delay =0;
00089 static int32 VBV_buffer = 0;
00090 static int32 bufferFillRate = 0;
00091 static int32 frameDelayIncrement = 0;
00092
00093
00094 static int Xi, Xp, Xb;
00095
00096 static int Si, Sp, Sb;
00097
00098 static float Qi, Qp, Qb;
00099
00100
00101 int Ti, Tp, Tb;
00102
00103 int current_Tx;
00104
00105
00106 int GOP_X = 0;
00107 int GOP_I = 0;
00108 int GOP_P = 0;
00109 int GOP_B = 0;
00110
00111 int Nx = 0;
00112 int Ni = 0;
00113 int Np = 0;
00114 int Nb = 0;
00115
00116
00117
00118 int rc_numBlocks = 0;
00119 int rc_totalQuant = 0;
00120 int rc_bitsThisMB;
00121 int rc_totalMBBits;
00122 int rc_totalFrameBits;
00123 int rc_totalOverheadBits = 0;
00124
00125
00126
00127 int RC_MB_SAMPLE_RATE = 0;
00128
00129 static float Ki = .7;
00130 static float Kp = 1;
00131 static float Kb = 1.4;
00132 static int rc_R;
00133 static int rc_G;
00134
00135
00136
00137
00138 static int d0_i;
00139 static int d0_p;
00140 static int d0_b;
00141
00142 static int lastFrameVirtBuf;
00143 static int currentVirtBuf;
00144
00145 static int MB_cnt = -1;
00146
00147 static int rc_Q;
00148
00149 static int reactionParameter;
00150
00151
00152 static int act_j;
00153 static float N_act;
00154 static int avg_act;
00155 static int total_act_j;
00156
00157 static int var_sblk;
00158 static int P_mean;
00159
00160 static int mquant;
00161 static int Qscale;
00162
00163
00164
00165
00166 #ifdef RC_STATS_FILE
00167 static FILE *RC_FILE;
00168 #endif
00169
00170 static char *Frame_header1 = " Fm # Bit GOP V ";
00171 static char *Frame_header2 = " # type MBs Alloc left Ni Np Nb N_act buff Q_rc Qscale";
00172 static char *Frame_header3 = "---- - ---- ------ ------- -- -- -- ----- ------ ---- ----";
00173 static char *Frame_trailer1 = " avg virt % GOP % VBV";
00174 static char *Frame_trailer2 = " Sx Qx Xx act N_act buffer alloc left left buf delay";
00175 static char *Frame_trailer3 = "------ --.-- ------- --- --.-- ------- --- ------- --- ------- ------";
00176
00177 static char *MB_header1 = "MB# #bits Q mqt Dj Q_j actj N_act totbits b/MB %alloc %done";
00178 static char *MB_header2 = "--- ----- -- --- ------ --- ----- --.-- ------ ---- --- ---";
00179
00180 static char rc_buffer[101];
00181
00182
00183 extern char *framePattern;
00184 extern int framePatternLen;
00185
00186
00187
00188
00189
00190
00191 int initGOPRateControl _ANSI_ARGS_((void));
00192 int determineMBCount _ANSI_ARGS_((void));
00193 void checkBufferFullness _ANSI_ARGS_((int count));
00194 void checkSpatialActivity _ANSI_ARGS_((Block blk0, Block blk1, Block blk2, Block blk3));
00195 void incNumBlocks _ANSI_ARGS_((int num));
00196 void calculateVBVDelay _ANSI_ARGS_((int num));
00197 void updateVBVBuffer _ANSI_ARGS_((int frameBits));
00198 int BlockExperiments _ANSI_ARGS_((int16 *OrigBlock, int16 *NewBlock, int control));
00199
00200
00201
00202
00203
00204
00205
00206
00207
00208
00209
00210
00211
00212
00213
00214
00215
00216
00217 int
00218 initRateControl()
00219 {
00220 int index;
00221 int result;
00222
00223 DBG_PRINT(("\tInitializing Allocation Data\n"));
00224
00225 #ifdef RC_STATS_FILE
00226 RC_FILE = fopen("RC_STATS_FILE", "w");
00227 if ( RC_FILE == NULL) {
00228 DBG_PRINT(("\tOpen of RC file failed, using stderr\n"));
00229 RC_FILE = stderr;
00230 fprintf(RC_FILE, "\tOpen of RC file failed, using stderr\n");
00231 fflush(RC_FILE);
00232 }
00233 #endif
00234
00235
00236 GOP_X = framePatternLen;
00237 for ( index = 0; index < framePatternLen; index++ ) {
00238 switch( framePattern[index] ) {
00239 case 'i':
00240 GOP_I++;
00241 break;
00242 case 'p':
00243 GOP_P++;
00244 break;
00245 case 'b':
00246 GOP_B++;
00247 break;
00248 default:
00249 printf("\n\tERROR rate.c - BAD PATTERN!\n");
00250 RateControlMode = VARIABLE_RATE;
00251 return (0);
00252 }
00253 }
00254 if (GOP_X != (GOP_I + GOP_P + GOP_B )) {
00255 printf("\n\tERROR rate.c - Pattern Length Mismatch\n");
00256 RateControlMode = VARIABLE_RATE;
00257 return (-1);
00258 }
00259
00260
00261 rc_R = 0;
00262 rc_G = (bit_rate * GOP_X/frameRateRounded);
00263
00264
00265 Xi = (160 * bit_rate/115);
00266 Xp = (60 * bit_rate/115);
00267 Xb = (42 * bit_rate/115);
00268
00269
00270 rc_totalMBBits= rc_bitsThisMB= rc_totalFrameBits=rc_totalOverheadBits = 0;
00271 rc_numBlocks = rc_totalQuant = 0;
00272
00273
00274 reactionParameter = (2 * bit_rate / frameRateRounded);
00275 d0_i = (10 * reactionParameter / 31);
00276 d0_p = (Kp * d0_i);
00277 d0_b = (Kb * d0_i);
00278
00279 lastFrameVirtBuf = d0_i;
00280 rc_Q = lastFrameVirtBuf * 31 / reactionParameter;
00281
00282
00283 avg_act = 400;
00284 N_act = 1;
00285
00286 mquant = rc_Q * N_act;
00287
00288 frameDelayIncrement = (90000 / frameRateRounded);
00289 bufferFillRate = bit_rate / frameRateRounded;
00290 VBV_buffer = buffer_size;
00291 DBG_PRINT(("\tVBV- delay: %d, fill rate: %d, delay/Frame: %d units, buffer size: %d\n",
00292 VBV_delay, bufferFillRate, frameDelayIncrement, buffer_size));
00293
00294 result = initGOPRateControl();
00295
00296 return result;
00297 }
00298
00299
00300
00301
00302
00303
00304
00305
00306
00307
00308
00309
00310
00311 int
00312 initGOPRateControl()
00313 {
00314 DBG_PRINT(("\tInitializing new GOP\n"));
00315
00316 Nx = GOP_X;
00317 Ni = GOP_I;
00318 Np = GOP_P;
00319 Nb = GOP_B;
00320
00321 rc_R += rc_G;
00322
00323 DBG_PRINT(("\tbufsize: %d, bitrate: %d, pictrate: %d, GOP bits: %d\n",
00324 buffer_size, bit_rate, frameRateRounded, rc_R));
00325 DBG_PRINT(("\tXi: %d, Xp: %d, Xb: %d Nx: %d, Ni: %d, Np: %d, Nb: %d\n",
00326 Xi, Xp, Xb, Nx,Ni,Np,Nb));
00327 DBG_PRINT(("\td0_i: %d, d0_p: %d, d0_b: %d, avg_act: %d, rc_Q: %d, mquant: %d\n",
00328 d0_i, d0_p, d0_b, avg_act, rc_Q, mquant));
00329 return 1;
00330 }
00331
00332
00333
00334
00335
00336
00337
00338
00339
00340
00341
00342
00343
00344
00345 void
00346 targetRateControl(frame)
00347 MpegFrame *frame;
00348 {
00349 float temp1, minimumBits;
00350 float tempX, tempY, tempZ;
00351 int result;
00352 int frameType;
00353 char *strPtr;
00354
00355 minimumBits = (bit_rate / (8 * frameRateRounded));
00356
00357
00358 if (Nx == 0) {
00359 initGOPRateControl();
00360 }
00361
00362 if (MB_cnt < 0) {MB_cnt = determineMBCount();}
00363
00364 switch (frame->type) {
00365 case TYPE_IFRAME:
00366 frameType = 'I';
00367
00368
00369
00370 tempX = ( (Np * Ki * Xp) / (Xi * Kp) );
00371 tempY = ( (Nb * Ki * Xb) / (Xi*Kb) );
00372 tempZ = Ni + tempX + tempY;
00373 temp1 = (rc_R / tempZ);
00374 result = (int) (temp1 > minimumBits ? temp1 : minimumBits);
00375 current_Tx = Ti = result;
00376 lastFrameVirtBuf = d0_i;
00377 break;
00378
00379 case TYPE_PFRAME:
00380 frameType = 'P';
00381 tempX = ( (Ni * Kp * Xi) / (Ki * Xp) );
00382 tempY = ( (Nb * Kp * Xb) / (Kb * Xp) );
00383 tempZ = Np + tempX + tempY;
00384 temp1 = (rc_R/ tempZ);
00385 result = (int) (temp1 > minimumBits ? temp1 : minimumBits);
00386 current_Tx = Tp = result;
00387 lastFrameVirtBuf = d0_p;
00388 break;
00389
00390 case TYPE_BFRAME:
00391 frameType = 'B';
00392 tempX = ( (Ni * Kb * Xi) / (Ki * Xb) );
00393 tempY = ( (Np * Kb * Xp) / (Kp * Xb) );
00394 tempZ = Nb + tempX + tempY;
00395 temp1 = (rc_R/ tempZ);
00396 result = (int) (temp1 > minimumBits ? temp1 : minimumBits);
00397 current_Tx = Tb = result;
00398 lastFrameVirtBuf = d0_b;
00399 break;
00400
00401 default:
00402 frameType = 'X';
00403 }
00404
00405 N_act = 1;
00406 rc_Q = lastFrameVirtBuf * 31 / reactionParameter;
00407 mquant = rc_Q * N_act;
00408 Qscale = (mquant > 31 ? 31 : mquant);
00409 Qscale = (Qscale < 1 ? 1 : Qscale);
00410
00411
00412 strPtr = Frame_header1;
00413 DBG_PRINT(("%s\n",strPtr));
00414 strPtr = Frame_header2;
00415 DBG_PRINT(("%s\n",strPtr));
00416 strPtr = Frame_header3;
00417 DBG_PRINT(("%s\n",strPtr));
00418
00419
00420 sprintf(rc_buffer, "%4d %1c %4d %6d %7d %2d %2d %2d %2.2f %6d %4d %3d",
00421 frame->id,frameType,MB_cnt,current_Tx,rc_R,Ni,Np,Nb, N_act, lastFrameVirtBuf, rc_Q, Qscale);
00422
00423 #ifdef RC_STATS_FILE
00424 fprintf(RC_FILE,"%s\n", rc_buffer);
00425 fflush(RC_FILE);
00426 #endif
00427 DBG_PRINT(("%s\n",rc_buffer));
00428
00429
00430 if (RC_MB_SAMPLE_RATE) {
00431 strPtr = MB_header1;
00432 DBG_PRINT(("%s\n",strPtr));
00433 strPtr = MB_header2;
00434 DBG_PRINT(("%s\n",strPtr));
00435 } else {
00436 return;
00437 }
00438
00439 return;
00440 }
00441
00442
00443
00444
00445
00446
00447
00448
00449
00450
00451
00452
00453
00454
00455
00456 void
00457 updateRateControl(type)
00458 int type;
00459 {
00460 int totalBits, frameComplexity, pctAllocUsed, pctGOPUsed;
00461 float avgQuant;
00462 char *strPtr;
00463
00464 totalBits = rc_totalFrameBits;
00465 avgQuant = ((float) rc_totalQuant / (float) rc_numBlocks);
00466 frameComplexity = totalBits * avgQuant;
00467 pctAllocUsed = (totalBits *100 / current_Tx);
00468 rc_R -= totalBits;
00469 pctGOPUsed = (rc_R *100/ rc_G);
00470
00471 avg_act = (total_act_j / MB_cnt);
00472
00473 updateVBVBuffer(totalBits);
00474
00475 switch (type) {
00476 case TYPE_IFRAME:
00477 Ti = current_Tx;
00478 d0_i = currentVirtBuf;
00479 Ni--;
00480 Si = totalBits;
00481 Qi = avgQuant;
00482 Xi = frameComplexity;
00483 break;
00484 case TYPE_PFRAME:
00485 Tp = current_Tx;
00486 d0_p = currentVirtBuf;
00487 Np--;
00488 Sp = totalBits;
00489 Qp = avgQuant;
00490 Xp = frameComplexity;
00491 break;
00492 case TYPE_BFRAME:
00493 Tb = current_Tx;
00494 d0_b = currentVirtBuf;
00495 Nb--;
00496 Sb = totalBits;
00497 Qb = avgQuant;
00498 Xb = frameComplexity;
00499 break;
00500 }
00501
00502
00503
00504 strPtr = Frame_trailer1;
00505 DBG_PRINT(("%s\n",strPtr));
00506 strPtr = Frame_trailer2;
00507 DBG_PRINT(("%s\n",strPtr));
00508 strPtr = Frame_trailer3;
00509 DBG_PRINT(("%s\n",strPtr));
00510
00511 sprintf(rc_buffer, "%6d %2.2f %6d %3d %2.2f %7d %3d %7d %3d %6d %6d",
00512 totalBits, avgQuant, frameComplexity, avg_act, N_act, currentVirtBuf, pctAllocUsed, rc_R, pctGOPUsed, VBV_buffer, VBV_delay);
00513 #ifdef RC_STATS_FILE
00514 fprintf(RC_FILE,"%s\n", rc_buffer);
00515 fflush(RC_FILE);
00516 #endif
00517 DBG_PRINT(("%s\n",rc_buffer));
00518
00519 Nx--;
00520 rc_totalMBBits= rc_bitsThisMB= rc_totalFrameBits=rc_totalOverheadBits = 0;
00521 rc_numBlocks = rc_totalQuant = total_act_j = currentVirtBuf = 0;
00522
00523 DBG_PRINT(("GOP now has %d bits remaining (%3d%%) for %d frames .. , Ni= %d, Np= %d, Nb= %d\n", rc_R, (rc_R*100/rc_G), (Ni+Np+Nb), Ni, Np, Nb));
00524
00525 }
00526
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00542
00543
00544 void
00545 MB_RateOut(type)
00546 int type;
00547 {
00548 int totalBits;
00549 int pctUsed, pctDone;
00550 int bitsThisMB;
00551 int bitsPerMB;
00552
00553 bitsThisMB = rc_bitsThisMB;
00554 totalBits = rc_totalFrameBits;
00555 bitsPerMB = (totalBits / rc_numBlocks);
00556 pctDone = (rc_numBlocks * 100/ MB_cnt);
00557 pctUsed = (totalBits *100/current_Tx);
00558
00559 sprintf(rc_buffer, "%3d %5d %2d %3d %6d %3d %6d %2.2f %6d %4d %3d %3d\n",
00560 (rc_numBlocks - 1), bitsThisMB, Qscale, mquant, currentVirtBuf,
00561 rc_Q, act_j, N_act, totalBits, bitsPerMB, pctUsed, pctDone);
00562 #ifdef RC_STATS_FILE
00563 fprintf(RC_FILE, "%s", rc_buffer);
00564 fflush(RC_FILE);
00565 #endif
00566
00567 if ( (RC_MB_SAMPLE_RATE) && ((rc_numBlocks -1) % RC_MB_SAMPLE_RATE)) {
00568 DBG_PRINT(("%s\n", rc_buffer));
00569 } else {
00570 return;
00571 }
00572 }
00573
00574
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00576
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00578
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00587
00588 void incNumBlocks(num)
00589 int num;
00590 {
00591 rc_numBlocks += num;
00592 }
00593
00594
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00598
00599
00600
00601
00602
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00607
00608
00609 void incMacroBlockBits(num)
00610 int num;
00611 {
00612 rc_bitsThisMB = num;
00613 rc_totalMBBits += num;
00614 rc_totalFrameBits += num;
00615 }
00616
00617
00618
00619
00620
00621
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00623
00624
00625
00626
00627
00628 int needQScaleChange(oldQScale, blk0, blk1, blk2, blk3)
00629 int oldQScale;
00630 Block blk0;
00631 Block blk1;
00632 Block blk2;
00633 Block blk3;
00634 {
00635
00636
00637 rc_numBlocks++;
00638
00639 checkBufferFullness(oldQScale);
00640
00641 checkSpatialActivity(blk0, blk1, blk2, blk3);
00642
00643 mquant = rc_Q * N_act;
00644 Qscale = (mquant > 31 ? 31 : mquant);
00645 Qscale = (Qscale < 1 ? 1 : Qscale);
00646 rc_totalQuant += Qscale;
00647
00648 if (oldQScale == Qscale)
00649 return -1;
00650 else
00651 return Qscale;
00652 }
00653
00654
00655
00656
00657
00658
00659
00660
00661
00662
00663
00664
00665
00666
00667 int
00668 determineMBCount ()
00669 {
00670 int y,x;
00671
00672 x = (Fsize_x +15)/16;
00673 y = (Fsize_y +15)/16;
00674 return (x * y);
00675 }
00676
00677
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00680
00681
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00687
00688
00689
00690
00691
00692
00693
00694
00695 void checkBufferFullness (oldQScale)
00696 int oldQScale;
00697 {
00698 int temp;
00699
00700 temp = lastFrameVirtBuf + rc_totalFrameBits;
00701 temp -= (current_Tx * rc_numBlocks / MB_cnt);
00702 currentVirtBuf = temp;
00703
00704 rc_Q = (currentVirtBuf * 31 / reactionParameter);
00705 return;
00706 }
00707
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00723
00724 void checkSpatialActivity(blk0, blk1, blk2, blk3)
00725 Block blk0;
00726 Block blk1;
00727 Block blk2;
00728 Block blk3;
00729 {
00730 int temp;
00731 int16 *blkArray[4];
00732 int16 *curBlock;
00733 int16 *blk_ptr;
00734 int var[4];
00735 int i, j;
00736
00737
00738 blkArray[0] = (int16 *) blk0;
00739 blkArray[1] = (int16 *) blk1;
00740 blkArray[2] = (int16 *) blk2;
00741 blkArray[3] = (int16 *) blk3;
00742
00743
00744 for (i =0; i < 4; i++) {
00745 curBlock = blkArray[i];
00746 blk_ptr = curBlock;
00747 P_mean = 0;
00748
00749 for (j=0; j < DCTSIZE_SQ; j ++) {
00750 P_mean += *(blk_ptr++);
00751
00752
00753
00754
00755
00756 }
00757 P_mean /= DCTSIZE_SQ;
00758
00759
00760 curBlock = blkArray[i];
00761 blk_ptr = curBlock;
00762 var[i] = 0;
00763 for (j=0; j < DCTSIZE_SQ; j++) {
00764 #ifdef notdef
00765 if (curBlock[j] != *(blk_ptr++)) {
00766 printf("\n\tARRAY ERROR: block %d\n", j);
00767 }
00768 temp = curBlock[j] - P_mean;
00769 #endif
00770 temp = *(blk_ptr++) - P_mean;
00771 var[i] += (temp * temp);
00772 }
00773 var[i] /= DCTSIZE_SQ;
00774 }
00775
00776
00777 var_sblk = var[0];
00778 for (i=1; i < 4; i++) {
00779 var_sblk = (var_sblk < var[i] ? var_sblk : var[i]);
00780 }
00781
00782
00783 act_j = 1 + var_sblk;
00784 total_act_j += act_j;
00785 temp = (2 * act_j + avg_act);
00786 N_act = ( (float) temp / (float) (act_j + 2*avg_act) );
00787
00788 return;
00789 }
00790
00791
00792
00793
00794
00795
00796
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00798
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00805
00806 int getRateMode()
00807 {
00808 return RateControlMode;
00809 }
00810
00811
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00825
00826
00827 void setBitRate (charPtr)
00828 char * charPtr;
00829 {
00830 int rate, rnd;
00831
00832 rate = atoi(charPtr);
00833 if (rate > 0) {
00834 RateControlMode = FIXED_RATE;
00835 } else {
00836 printf("Parameter File Error: invalid BIT_RATE: \"%s\", defaults to Variable ratemode\n",
00837 charPtr);
00838 RateControlMode = VARIABLE_RATE;
00839 bit_rate = -1;
00840 }
00841 rnd = (rate % 400);
00842 rate += (rnd ? 400 -rnd : 0);
00843 rate = (rate > MAX_BIT_RATE ? MAX_BIT_RATE : rate);
00844 bit_rate = rate;
00845 DBG_PRINT(("Bit rate is: %d\n", bit_rate));
00846 }
00847
00848
00849
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00852
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00861
00862
00863 int getBitRate ()
00864 {
00865 return bit_rate;
00866 }
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00876
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00883
00884
00885 void setBufferSize (charPtr)
00886 char * charPtr;
00887 {
00888 int size;
00889
00890 size = atoi(charPtr);
00891 size = (size > MAX_BUFFER_SIZE ? MAX_BUFFER_SIZE : size);
00892 if (size > 0) {
00893 size = (16*1024) * ((size + (16*1024 - 1)) / (16*1024));
00894 buffer_size = size;
00895 } else {
00896 buffer_size = DEFAULT_BUFFER_SIZE;
00897 printf("Parameter File Error: invalid BUFFER_SIZE: \"%s\", defaults to : %d\n",
00898 charPtr, buffer_size);
00899 }
00900 DBG_PRINT(("Buffer size is: %d\n", buffer_size));
00901 }
00902
00903
00904
00905
00906
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00916 int getBufferSize ()
00917 {
00918 return buffer_size;
00919 }
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00938 void updateVBVBuffer (frameBits)
00939 int frameBits;
00940 {
00941 if (VBV_delay) {
00942 VBV_delay -= frameDelayIncrement;
00943 if (VBV_delay < 0) {
00944 VBV_delay = 0;
00945 }
00946
00947 } else {
00948 VBV_buffer -= frameBits;
00949 }
00950 VBV_buffer += bufferFillRate;
00951 if (VBV_buffer < 0) {
00952 fprintf(stderr, "\tWARNING - VBV buffer underflow (%d)\n", VBV_buffer);
00953 }
00954 if (VBV_buffer > buffer_size) {
00955 fprintf(stderr, "WARNING - VBV buffer overflow (%d > %d)\n",
00956 VBV_buffer, buffer_size);
00957 }
00958 }