~ubuntu-branches/ubuntu/oneiric/mplayer2/oneiric-proposed

snprintf(s->avctx->stats_out, 256, "in:%d out:%d type:%d q:%d itex:%d ptex:%d mv:%d misc:%d fcode:%d bcode:%d mc-var:%d var:%d icount:%d skipcount:%d hbits:%d;\n",

s->current_picture_ptr->display_picture_number, s->current_picture_ptr->coded_picture_number, s->pict_type,

s->current_picture.quality, s->i_tex_bits, s->p_tex_bits, s->mv_bits, s->misc_bits,

s->f_code, s->b_code, s->current_picture.mc_mb_var_sum, s->current_picture.mb_var_sum, s->i_count, s->skip_count, s->header_bits);

}

static inline double qp2bits(RateControlEntry *rce, double qp){

if(qp<=0.0){

av_log(NULL, AV_LOG_ERROR, "qp<=0.0\n");

}

return rce->qscale * (double)(rce->i_tex_bits + rce->p_tex_bits+1)/ qp;

}

static inline double bits2qp(RateControlEntry *rce, double bits){

if(bits<0.9){

av_log(NULL, AV_LOG_ERROR, "bits<0.9\n");

}

return rce->qscale * (double)(rce->i_tex_bits + rce->p_tex_bits+1)/ bits;

}

int ff_rate_control_init(MpegEncContext *s)

{

RateControlContext *rcc= &s->rc_context;

int i, res;

static const char * const const_names[]={

"PI",

"E",

"iTex",

"pTex",

"tex",

"mv",

"fCode",

"iCount",

"mcVar",

"var",

"isI",

"isP",

"isB",

"avgQP",

"qComp",

/* "lastIQP",

"lastPQP",

"lastBQP",

"nextNonBQP",*/

"avgIITex",

"avgPITex",

"avgPPTex",

"avgBPTex",

"avgTex",

NULL

};

static double (* const func1[])(void *, double)={

(void *)bits2qp,

(void *)qp2bits,

100

NULL

101

};

102

static const char * const func1_names[]={

103

"bits2qp",

104

"qp2bits",

105

NULL

106

};

107

emms_c();

108

109

res = av_expr_parse(&rcc->rc_eq_eval, s->avctx->rc_eq ? s->avctx->rc_eq : "tex^qComp", const_names, func1_names, func1, NULL, NULL, 0, s->avctx);

110

if (res < 0) {

111

av_log(s->avctx, AV_LOG_ERROR, "Error parsing rc_eq \"%s\"\n", s->avctx->rc_eq);

112

return res;

113

}

114

115

for(i=0; i<5; i++){

116

rcc->pred[i].coeff= FF_QP2LAMBDA * 7.0;

117

rcc->pred[i].count= 1.0;

118

119

rcc->pred[i].decay= 0.4;

120

rcc->i_cplx_sum [i]=

121

rcc->p_cplx_sum [i]=

122

rcc->mv_bits_sum[i]=

123

rcc->qscale_sum [i]=

124

rcc->frame_count[i]= 1; // 1 is better because of 1/0 and such

125

rcc->last_qscale_for[i]=FF_QP2LAMBDA * 5;

126

}

127

rcc->buffer_index= s->avctx->rc_initial_buffer_occupancy;

128

129

if(s->flags&CODEC_FLAG_PASS2){

130

int i;

131

char *p;

132

133

/* find number of pics */

134

p= s->avctx->stats_in;

135

for(i=-1; p; i++){

136

p= strchr(p+1, ';');

137

}

138

i+= s->max_b_frames;

139

if(i<=0 || i>=INT_MAX / sizeof(RateControlEntry))

140

return -1;

141

rcc->entry = av_mallocz(i*sizeof(RateControlEntry));

142

rcc->num_entries= i;

143

144

/* init all to skipped p frames (with b frames we might have a not encoded frame at the end FIXME) */

145

for(i=0; i<rcc->num_entries; i++){

146

RateControlEntry *rce= &rcc->entry[i];

147

rce->pict_type= rce->new_pict_type=FF_P_TYPE;

148

rce->qscale= rce->new_qscale=FF_QP2LAMBDA * 2;

149

rce->misc_bits= s->mb_num + 10;

150

rce->mb_var_sum= s->mb_num*100;

151

}

152

153

/* read stats */

154

p= s->avctx->stats_in;

155

for(i=0; i<rcc->num_entries - s->max_b_frames; i++){

156

RateControlEntry *rce;

157

int picture_number;

158

int e;

159

char *next;

160

161

next= strchr(p, ';');

162

if(next){

163

(*next)=0; //sscanf in unbelievably slow on looong strings //FIXME copy / do not write

164

next++;

165

}

166

e= sscanf(p, " in:%d ", &picture_number);

167

168

assert(picture_number >= 0);

169

assert(picture_number < rcc->num_entries);

170

rce= &rcc->entry[picture_number];

171

172

e+=sscanf(p, " in:%*d out:%*d type:%d q:%f itex:%d ptex:%d mv:%d misc:%d fcode:%d bcode:%d mc-var:%d var:%d icount:%d skipcount:%d hbits:%d",

173

&rce->pict_type, &rce->qscale, &rce->i_tex_bits, &rce->p_tex_bits, &rce->mv_bits, &rce->misc_bits,

174

&rce->f_code, &rce->b_code, &rce->mc_mb_var_sum, &rce->mb_var_sum, &rce->i_count, &rce->skip_count, &rce->header_bits);

175

if(e!=14){

176

av_log(s->avctx, AV_LOG_ERROR, "statistics are damaged at line %d, parser out=%d\n", i, e);

177

return -1;

178

}

179

180

p= next;

181

}

182

183

if(init_pass2(s) < 0) return -1;

184

185

//FIXME maybe move to end

186

if((s->flags&CODEC_FLAG_PASS2) && s->avctx->rc_strategy == FF_RC_STRATEGY_XVID) {

187

#if CONFIG_LIBXVID

188

return ff_xvid_rate_control_init(s);

189

#else

190

av_log(s->avctx, AV_LOG_ERROR, "Xvid ratecontrol requires libavcodec compiled with Xvid support.\n");

191

return -1;

192

#endif

193

}

194

}

195

196

if(!(s->flags&CODEC_FLAG_PASS2)){

197

198

rcc->short_term_qsum=0.001;

199

rcc->short_term_qcount=0.001;

200

201

rcc->pass1_rc_eq_output_sum= 0.001;

202

rcc->pass1_wanted_bits=0.001;

203

204

if(s->avctx->qblur > 1.0){

205

av_log(s->avctx, AV_LOG_ERROR, "qblur too large\n");

206

return -1;

207

}

208

/* init stuff with the user specified complexity */

209

if(s->avctx->rc_initial_cplx){

210

for(i=0; i<60*30; i++){

211

double bits= s->avctx->rc_initial_cplx * (i/10000.0 + 1.0)*s->mb_num;

212

RateControlEntry rce;

213

214

if (i%((s->gop_size+3)/4)==0) rce.pict_type= FF_I_TYPE;

215

else if(i%(s->max_b_frames+1)) rce.pict_type= FF_B_TYPE;

216

else rce.pict_type= FF_P_TYPE;

217

218

rce.new_pict_type= rce.pict_type;

219

rce.mc_mb_var_sum= bits*s->mb_num/100000;

220

rce.mb_var_sum = s->mb_num;

221

rce.qscale = FF_QP2LAMBDA * 2;

222

rce.f_code = 2;

223

rce.b_code = 1;

224

rce.misc_bits= 1;

225

226

if(s->pict_type== FF_I_TYPE){

227

rce.i_count = s->mb_num;

228

rce.i_tex_bits= bits;

229

rce.p_tex_bits= 0;

230

rce.mv_bits= 0;

231

}else{

232

rce.i_count = 0; //FIXME we do know this approx

233

rce.i_tex_bits= 0;

234

rce.p_tex_bits= bits*0.9;

235

rce.mv_bits= bits*0.1;

236

}

237

rcc->i_cplx_sum [rce.pict_type] += rce.i_tex_bits*rce.qscale;

238

rcc->p_cplx_sum [rce.pict_type] += rce.p_tex_bits*rce.qscale;

239

rcc->mv_bits_sum[rce.pict_type] += rce.mv_bits;

240

rcc->frame_count[rce.pict_type] ++;

241

242

get_qscale(s, &rce, rcc->pass1_wanted_bits/rcc->pass1_rc_eq_output_sum, i);

243

rcc->pass1_wanted_bits+= s->bit_rate/(1/av_q2d(s->avctx->time_base)); //FIXME misbehaves a little for variable fps

244

}

245

}

246

247

}

248

249

return 0;

250

}

251

252

void ff_rate_control_uninit(MpegEncContext *s)

253

{

254

RateControlContext *rcc= &s->rc_context;

255

emms_c();

256

257

av_expr_free(rcc->rc_eq_eval);

258

av_freep(&rcc->entry);

259

260

#if CONFIG_LIBXVID

261

if((s->flags&CODEC_FLAG_PASS2) && s->avctx->rc_strategy == FF_RC_STRATEGY_XVID)

262

ff_xvid_rate_control_uninit(s);

263

#endif

264

}

265

266

int ff_vbv_update(MpegEncContext *s, int frame_size){

267

RateControlContext *rcc= &s->rc_context;

268

const double fps= 1/av_q2d(s->avctx->time_base);

269

const int buffer_size= s->avctx->rc_buffer_size;

270

const double min_rate= s->avctx->rc_min_rate/fps;

271

const double max_rate= s->avctx->rc_max_rate/fps;

272

273

//printf("%d %f %d %f %f\n", buffer_size, rcc->buffer_index, frame_size, min_rate, max_rate);

274

if(buffer_size){

275

int left;

276

277

rcc->buffer_index-= frame_size;

278

if(rcc->buffer_index < 0){

279

av_log(s->avctx, AV_LOG_ERROR, "rc buffer underflow\n");

280

rcc->buffer_index= 0;

281

}

282

283

left= buffer_size - rcc->buffer_index - 1;

284

rcc->buffer_index += av_clip(left, min_rate, max_rate);

285

286

if(rcc->buffer_index > buffer_size){

287

int stuffing= ceil((rcc->buffer_index - buffer_size)/8);

288

289

if(stuffing < 4 && s->codec_id == CODEC_ID_MPEG4)

290

stuffing=4;

291

rcc->buffer_index -= 8*stuffing;

292

293

if(s->avctx->debug & FF_DEBUG_RC)

294

av_log(s->avctx, AV_LOG_DEBUG, "stuffing %d bytes\n", stuffing);

295

296

return stuffing;

297

}

298

}

299

return 0;

300

}

301

302

/**

303

* modifies the bitrate curve from pass1 for one frame

304

305

static double get_qscale(MpegEncContext *s, RateControlEntry *rce, double rate_factor, int frame_num){

306

RateControlContext *rcc= &s->rc_context;

307

AVCodecContext *a= s->avctx;

308

double q, bits;

309

const int pict_type= rce->new_pict_type;

310

const double mb_num= s->mb_num;

311

int i;

312

313

double const_values[]={

314

M_PI,

315

M_E,

316

rce->i_tex_bits*rce->qscale,

317

rce->p_tex_bits*rce->qscale,

318

(rce->i_tex_bits + rce->p_tex_bits)*(double)rce->qscale,

319

rce->mv_bits/mb_num,

320

rce->pict_type == FF_B_TYPE ? (rce->f_code + rce->b_code)*0.5 : rce->f_code,

321

rce->i_count/mb_num,

322

rce->mc_mb_var_sum/mb_num,

323

rce->mb_var_sum/mb_num,

324

rce->pict_type == FF_I_TYPE,

325

rce->pict_type == FF_P_TYPE,

326

rce->pict_type == FF_B_TYPE,

327

rcc->qscale_sum[pict_type] / (double)rcc->frame_count[pict_type],

328

a->qcompress,

329

/* rcc->last_qscale_for[FF_I_TYPE],

330

rcc->last_qscale_for[FF_P_TYPE],

331

rcc->last_qscale_for[FF_B_TYPE],

332

rcc->next_non_b_qscale,*/

333

rcc->i_cplx_sum[FF_I_TYPE] / (double)rcc->frame_count[FF_I_TYPE],

334

rcc->i_cplx_sum[FF_P_TYPE] / (double)rcc->frame_count[FF_P_TYPE],

335

rcc->p_cplx_sum[FF_P_TYPE] / (double)rcc->frame_count[FF_P_TYPE],

336

rcc->p_cplx_sum[FF_B_TYPE] / (double)rcc->frame_count[FF_B_TYPE],

337

(rcc->i_cplx_sum[pict_type] + rcc->p_cplx_sum[pict_type]) / (double)rcc->frame_count[pict_type],

338

339

};

340

341

bits = av_expr_eval(rcc->rc_eq_eval, const_values, rce);

342

if (isnan(bits)) {

343

av_log(s->avctx, AV_LOG_ERROR, "Error evaluating rc_eq \"%s\"\n", s->avctx->rc_eq);

344

return -1;

345

}

346

347

rcc->pass1_rc_eq_output_sum+= bits;

348

bits*=rate_factor;

349

if(bits<0.0) bits=0.0;

350

bits+= 1.0; //avoid 1/0 issues

351

352

/* user override */

353

for(i=0; i<s->avctx->rc_override_count; i++){

354

RcOverride *rco= s->avctx->rc_override;

355

if(rco[i].start_frame > frame_num) continue;

356

if(rco[i].end_frame < frame_num) continue;

357

358

if(rco[i].qscale)

359

bits= qp2bits(rce, rco[i].qscale); //FIXME move at end to really force it?

360

else

361

bits*= rco[i].quality_factor;

362

}

363

364

q= bits2qp(rce, bits);

365

366

/* I/B difference */

367

if (pict_type==FF_I_TYPE && s->avctx->i_quant_factor<0.0)

368

q= -q*s->avctx->i_quant_factor + s->avctx->i_quant_offset;

369

else if(pict_type==FF_B_TYPE && s->avctx->b_quant_factor<0.0)

370

q= -q*s->avctx->b_quant_factor + s->avctx->b_quant_offset;

371

if(q<1) q=1;

372

373

return q;

374

}

375

376

static double get_diff_limited_q(MpegEncContext *s, RateControlEntry *rce, double q){

377

RateControlContext *rcc= &s->rc_context;

378

AVCodecContext *a= s->avctx;

379

const int pict_type= rce->new_pict_type;

380

const double last_p_q = rcc->last_qscale_for[FF_P_TYPE];

381

const double last_non_b_q= rcc->last_qscale_for[rcc->last_non_b_pict_type];

382

383

if (pict_type==FF_I_TYPE && (a->i_quant_factor>0.0 || rcc->last_non_b_pict_type==FF_P_TYPE))

384

q= last_p_q *FFABS(a->i_quant_factor) + a->i_quant_offset;

385

else if(pict_type==FF_B_TYPE && a->b_quant_factor>0.0)

386

q= last_non_b_q* a->b_quant_factor + a->b_quant_offset;

387

if(q<1) q=1;

388

389

/* last qscale / qdiff stuff */

390

if(rcc->last_non_b_pict_type==pict_type || pict_type!=FF_I_TYPE){

391

double last_q= rcc->last_qscale_for[pict_type];

392

const int maxdiff= FF_QP2LAMBDA * a->max_qdiff;

393

394

if (q > last_q + maxdiff) q= last_q + maxdiff;

395

else if(q < last_q - maxdiff) q= last_q - maxdiff;

396

}

397

398

rcc->last_qscale_for[pict_type]= q; //Note we cannot do that after blurring

399

400

if(pict_type!=FF_B_TYPE)

401

rcc->last_non_b_pict_type= pict_type;

402

403

return q;

404

}

405

406

/**

407

* gets the qmin & qmax for pict_type

408

409

static void get_qminmax(int *qmin_ret, int *qmax_ret, MpegEncContext *s, int pict_type){

410

int qmin= s->avctx->lmin;

411

int qmax= s->avctx->lmax;

412

413

assert(qmin <= qmax);

414

415

if(pict_type==FF_B_TYPE){

416

qmin= (int)(qmin*FFABS(s->avctx->b_quant_factor)+s->avctx->b_quant_offset + 0.5);

417

qmax= (int)(qmax*FFABS(s->avctx->b_quant_factor)+s->avctx->b_quant_offset + 0.5);

418

}else if(pict_type==FF_I_TYPE){

419

qmin= (int)(qmin*FFABS(s->avctx->i_quant_factor)+s->avctx->i_quant_offset + 0.5);

420

qmax= (int)(qmax*FFABS(s->avctx->i_quant_factor)+s->avctx->i_quant_offset + 0.5);

421

}

422

423

qmin= av_clip(qmin, 1, FF_LAMBDA_MAX);

424

qmax= av_clip(qmax, 1, FF_LAMBDA_MAX);

425

426

if(qmax<qmin) qmax= qmin;

427

428

*qmin_ret= qmin;

429

*qmax_ret= qmax;

430

}

431

432

static double modify_qscale(MpegEncContext *s, RateControlEntry *rce, double q, int frame_num){

433

RateControlContext *rcc= &s->rc_context;

434

int qmin, qmax;

435

const int pict_type= rce->new_pict_type;

436

const double buffer_size= s->avctx->rc_buffer_size;

437

const double fps= 1/av_q2d(s->avctx->time_base);

438

const double min_rate= s->avctx->rc_min_rate / fps;

439

const double max_rate= s->avctx->rc_max_rate / fps;

440

441

get_qminmax(&qmin, &qmax, s, pict_type);

442

443

/* modulation */

444

if(s->avctx->rc_qmod_freq && frame_num%s->avctx->rc_qmod_freq==0 && pict_type==FF_P_TYPE)

445

q*= s->avctx->rc_qmod_amp;

446

447

//printf("q:%f\n", q);

448

/* buffer overflow/underflow protection */

449

if(buffer_size){

450

double expected_size= rcc->buffer_index;

451

double q_limit;

452

453

if(min_rate){

454

double d= 2*(buffer_size - expected_size)/buffer_size;

455

if(d>1.0) d=1.0;

456

else if(d<0.0001) d=0.0001;

457

q*= pow(d, 1.0/s->avctx->rc_buffer_aggressivity);

458

459

q_limit= bits2qp(rce, FFMAX((min_rate - buffer_size + rcc->buffer_index) * s->avctx->rc_min_vbv_overflow_use, 1));

460

if(q > q_limit){

461

if(s->avctx->debug&FF_DEBUG_RC){

462

av_log(s->avctx, AV_LOG_DEBUG, "limiting QP %f -> %f\n", q, q_limit);

463

}

464

q= q_limit;

465

}

466

}

467

468

if(max_rate){

469

double d= 2*expected_size/buffer_size;

470

if(d>1.0) d=1.0;

471

else if(d<0.0001) d=0.0001;

472

q/= pow(d, 1.0/s->avctx->rc_buffer_aggressivity);

473

474

q_limit= bits2qp(rce, FFMAX(rcc->buffer_index * s->avctx->rc_max_available_vbv_use, 1));

475

if(q < q_limit){

476

if(s->avctx->debug&FF_DEBUG_RC){

477

av_log(s->avctx, AV_LOG_DEBUG, "limiting QP %f -> %f\n", q, q_limit);

478

}

479

q= q_limit;

480

}

481

}

482

}

483

//printf("q:%f max:%f min:%f size:%f index:%d bits:%f agr:%f\n", q,max_rate, min_rate, buffer_size, rcc->buffer_index, bits, s->avctx->rc_buffer_aggressivity);

484

if(s->avctx->rc_qsquish==0.0 || qmin==qmax){

485

if (q<qmin) q=qmin;

486

else if(q>qmax) q=qmax;

487

}else{

488

double min2= log(qmin);

489

double max2= log(qmax);

490

491

q= log(q);

492

q= (q - min2)/(max2-min2) - 0.5;

493

q*= -4.0;

494

q= 1.0/(1.0 + exp(q));

495

q= q*(max2-min2) + min2;

496

497

q= exp(q);

498

}

499

500

return q;

501

}

502

503

//----------------------------------

504

// 1 Pass Code

505

506

static double predict_size(Predictor *p, double q, double var)

507

{

508

return p->coeff*var / (q*p->count);

509

}

510

511

512

static double predict_qp(Predictor *p, double size, double var)

513

{

514

//printf("coeff:%f, count:%f, var:%f, size:%f//\n", p->coeff, p->count, var, size);

515

return p->coeff*var / (size*p->count);

516

}

517

518

519

static void update_predictor(Predictor *p, double q, double var, double size)

520

{

521

double new_coeff= size*q / (var + 1);

522

if(var<10) return;

523

524

p->count*= p->decay;

525

p->coeff*= p->decay;

526

p->count++;

527

p->coeff+= new_coeff;

528

}

529

530

static void adaptive_quantization(MpegEncContext *s, double q){

531

int i;

532

const float lumi_masking= s->avctx->lumi_masking / (128.0*128.0);

533

const float dark_masking= s->avctx->dark_masking / (128.0*128.0);

534

const float temp_cplx_masking= s->avctx->temporal_cplx_masking;

535

const float spatial_cplx_masking = s->avctx->spatial_cplx_masking;

536

const float p_masking = s->avctx->p_masking;

537

const float border_masking = s->avctx->border_masking;

538

float bits_sum= 0.0;

539

float cplx_sum= 0.0;

540

float cplx_tab[s->mb_num];

541

float bits_tab[s->mb_num];

542

const int qmin= s->avctx->mb_lmin;

543

const int qmax= s->avctx->mb_lmax;

544

Picture * const pic= &s->current_picture;

545

const int mb_width = s->mb_width;

546

const int mb_height = s->mb_height;

547

548

for(i=0; i<s->mb_num; i++){

549

const int mb_xy= s->mb_index2xy[i];

550

float temp_cplx= sqrt(pic->mc_mb_var[mb_xy]); //FIXME merge in pow()

551

float spat_cplx= sqrt(pic->mb_var[mb_xy]);

552

const int lumi= pic->mb_mean[mb_xy];

553

float bits, cplx, factor;

554

int mb_x = mb_xy % s->mb_stride;

555

int mb_y = mb_xy / s->mb_stride;

556

int mb_distance;

557

float mb_factor = 0.0;

558

#if 0

559

if(spat_cplx < q/3) spat_cplx= q/3; //FIXME finetune

560

if(temp_cplx < q/3) temp_cplx= q/3; //FIXME finetune

561

#endif

562

if(spat_cplx < 4) spat_cplx= 4; //FIXME finetune

563

if(temp_cplx < 4) temp_cplx= 4; //FIXME finetune

564

565

if((s->mb_type[mb_xy]&CANDIDATE_MB_TYPE_INTRA)){//FIXME hq mode

566

cplx= spat_cplx;

567

factor= 1.0 + p_masking;

568

}else{

569

cplx= temp_cplx;

570

factor= pow(temp_cplx, - temp_cplx_masking);

571

}

572

factor*=pow(spat_cplx, - spatial_cplx_masking);

573

574

if(lumi>127)

575

factor*= (1.0 - (lumi-128)*(lumi-128)*lumi_masking);

576

else

577

factor*= (1.0 - (lumi-128)*(lumi-128)*dark_masking);

578

579

if(mb_x < mb_width/5){

580

mb_distance = mb_width/5 - mb_x;

581

mb_factor = (float)mb_distance / (float)(mb_width/5);

582

}else if(mb_x > 4*mb_width/5){

583

mb_distance = mb_x - 4*mb_width/5;

584

mb_factor = (float)mb_distance / (float)(mb_width/5);

585

}

586

if(mb_y < mb_height/5){

587

mb_distance = mb_height/5 - mb_y;

588

mb_factor = FFMAX(mb_factor, (float)mb_distance / (float)(mb_height/5));

589

}else if(mb_y > 4*mb_height/5){

590

mb_distance = mb_y - 4*mb_height/5;

591

mb_factor = FFMAX(mb_factor, (float)mb_distance / (float)(mb_height/5));

592

}

593

594

factor*= 1.0 - border_masking*mb_factor;

595

596

if(factor<0.00001) factor= 0.00001;

597

598

bits= cplx*factor;

599

cplx_sum+= cplx;

600

bits_sum+= bits;

601

cplx_tab[i]= cplx;

602

bits_tab[i]= bits;

603

}

604

605

/* handle qmin/qmax clipping */

606

if(s->flags&CODEC_FLAG_NORMALIZE_AQP){

607

float factor= bits_sum/cplx_sum;

608

for(i=0; i<s->mb_num; i++){

609

float newq= q*cplx_tab[i]/bits_tab[i];

610

newq*= factor;

611

612

if (newq > qmax){

613

bits_sum -= bits_tab[i];

614

cplx_sum -= cplx_tab[i]*q/qmax;

615

}

616

else if(newq < qmin){

617

bits_sum -= bits_tab[i];

618

cplx_sum -= cplx_tab[i]*q/qmin;

619

}

620

}

621

if(bits_sum < 0.001) bits_sum= 0.001;

622

if(cplx_sum < 0.001) cplx_sum= 0.001;

623

}

624

625

for(i=0; i<s->mb_num; i++){

626

const int mb_xy= s->mb_index2xy[i];

627

float newq= q*cplx_tab[i]/bits_tab[i];

628

int intq;

629

630

if(s->flags&CODEC_FLAG_NORMALIZE_AQP){

631

newq*= bits_sum/cplx_sum;

632

}

633

634

intq= (int)(newq + 0.5);

635

636

if (intq > qmax) intq= qmax;

637

else if(intq < qmin) intq= qmin;

638

//if(i%s->mb_width==0) printf("\n");

639

//printf("%2d%3d ", intq, ff_sqrt(s->mc_mb_var[i]));

640

s->lambda_table[mb_xy]= intq;

641

}

642

}

643

644

void ff_get_2pass_fcode(MpegEncContext *s){

645

RateControlContext *rcc= &s->rc_context;

646

int picture_number= s->picture_number;

647

RateControlEntry *rce;

648

649

rce= &rcc->entry[picture_number];

650

s->f_code= rce->f_code;

651

s->b_code= rce->b_code;

652

}

653

654

//FIXME rd or at least approx for dquant

655

656

float ff_rate_estimate_qscale(MpegEncContext *s, int dry_run)

657

{

658

float q;

659

int qmin, qmax;

660

float br_compensation;

661

double diff;

662

double short_term_q;

663

double fps;

664

int picture_number= s->picture_number;

665

int64_t wanted_bits;

666

RateControlContext *rcc= &s->rc_context;

667

AVCodecContext *a= s->avctx;

668

RateControlEntry local_rce, *rce;

669

double bits;

670

double rate_factor;

671

int var;

672

const int pict_type= s->pict_type;

673

Picture * const pic= &s->current_picture;

674

emms_c();

675

676

#if CONFIG_LIBXVID

677

if((s->flags&CODEC_FLAG_PASS2) && s->avctx->rc_strategy == FF_RC_STRATEGY_XVID)

678

return ff_xvid_rate_estimate_qscale(s, dry_run);

679

#endif

680

681

get_qminmax(&qmin, &qmax, s, pict_type);

682

683

fps= 1/av_q2d(s->avctx->time_base);

684

//printf("input_pic_num:%d pic_num:%d frame_rate:%d\n", s->input_picture_number, s->picture_number, s->frame_rate);

685

/* update predictors */

686

if(picture_number>2 && !dry_run){

687

const int last_var= s->last_pict_type == FF_I_TYPE ? rcc->last_mb_var_sum : rcc->last_mc_mb_var_sum;

688

update_predictor(&rcc->pred[s->last_pict_type], rcc->last_qscale, sqrt(last_var), s->frame_bits);

689

}

690

691

if(s->flags&CODEC_FLAG_PASS2){

692

assert(picture_number>=0);

693

assert(picture_number<rcc->num_entries);

694

rce= &rcc->entry[picture_number];

695

wanted_bits= rce->expected_bits;

696

}else{

697

Picture *dts_pic;

698

rce= &local_rce;

699

700

//FIXME add a dts field to AVFrame and ensure its set and use it here instead of reordering

701

//but the reordering is simpler for now until h.264 b pyramid must be handeld

702

if(s->pict_type == FF_B_TYPE || s->low_delay)

703

dts_pic= s->current_picture_ptr;

704

else

705

dts_pic= s->last_picture_ptr;

706

707

//if(dts_pic)

708

// av_log(NULL, AV_LOG_ERROR, "%Ld %Ld %Ld %d\n", s->current_picture_ptr->pts, s->user_specified_pts, dts_pic->pts, picture_number);

709

710

if(!dts_pic || dts_pic->pts == AV_NOPTS_VALUE)

711

wanted_bits= (uint64_t)(s->bit_rate*(double)picture_number/fps);

712

else

713

wanted_bits= (uint64_t)(s->bit_rate*(double)dts_pic->pts/fps);

714

}

715

716

diff= s->total_bits - wanted_bits;

717

br_compensation= (a->bit_rate_tolerance - diff)/a->bit_rate_tolerance;

718

if(br_compensation<=0.0) br_compensation=0.001;

719

720

var= pict_type == FF_I_TYPE ? pic->mb_var_sum : pic->mc_mb_var_sum;

721

722

short_term_q = 0; /* avoid warning */

723

if(s->flags&CODEC_FLAG_PASS2){

724

if(pict_type!=FF_I_TYPE)

725

assert(pict_type == rce->new_pict_type);

726

727

q= rce->new_qscale / br_compensation;

728

//printf("%f %f %f last:%d var:%d type:%d//\n", q, rce->new_qscale, br_compensation, s->frame_bits, var, pict_type);

729

}else{

730

rce->pict_type=

731

rce->new_pict_type= pict_type;

732

rce->mc_mb_var_sum= pic->mc_mb_var_sum;

733

rce->mb_var_sum = pic-> mb_var_sum;

734

rce->qscale = FF_QP2LAMBDA * 2;

735

rce->f_code = s->f_code;

736

rce->b_code = s->b_code;

737

rce->misc_bits= 1;

738

739

bits= predict_size(&rcc->pred[pict_type], rce->qscale, sqrt(var));

740

if(pict_type== FF_I_TYPE){

741

rce->i_count = s->mb_num;

742

rce->i_tex_bits= bits;

743

rce->p_tex_bits= 0;

744

rce->mv_bits= 0;

745

}else{

746

rce->i_count = 0; //FIXME we do know this approx

747

rce->i_tex_bits= 0;

748

rce->p_tex_bits= bits*0.9;

749

750

rce->mv_bits= bits*0.1;

751

}

752

rcc->i_cplx_sum [pict_type] += rce->i_tex_bits*rce->qscale;

753

rcc->p_cplx_sum [pict_type] += rce->p_tex_bits*rce->qscale;

754

rcc->mv_bits_sum[pict_type] += rce->mv_bits;

755

rcc->frame_count[pict_type] ++;

756

757

bits= rce->i_tex_bits + rce->p_tex_bits;

758

rate_factor= rcc->pass1_wanted_bits/rcc->pass1_rc_eq_output_sum * br_compensation;

759

760

q= get_qscale(s, rce, rate_factor, picture_number);

761

if (q < 0)

762

return -1;

763

764

assert(q>0.0);

765

//printf("%f ", q);

766

q= get_diff_limited_q(s, rce, q);

767

//printf("%f ", q);

768

assert(q>0.0);

769

770

if(pict_type==FF_P_TYPE || s->intra_only){ //FIXME type dependent blur like in 2-pass

771

rcc->short_term_qsum*=a->qblur;

772

rcc->short_term_qcount*=a->qblur;

773

774

rcc->short_term_qsum+= q;

775

rcc->short_term_qcount++;

776

//printf("%f ", q);

777

q= short_term_q= rcc->short_term_qsum/rcc->short_term_qcount;

778

//printf("%f ", q);

779

}

780

assert(q>0.0);

781

782

q= modify_qscale(s, rce, q, picture_number);

783

784

rcc->pass1_wanted_bits+= s->bit_rate/fps;

785

786

assert(q>0.0);

787

}

788

789

if(s->avctx->debug&FF_DEBUG_RC){

790

av_log(s->avctx, AV_LOG_DEBUG, "%c qp:%d<%2.1f<%d %d want:%d total:%d comp:%f st_q:%2.2f size:%d var:%d/%d br:%d fps:%d\n",

791

av_get_pict_type_char(pict_type), qmin, q, qmax, picture_number, (int)wanted_bits/1000, (int)s->total_bits/1000,

792

br_compensation, short_term_q, s->frame_bits, pic->mb_var_sum, pic->mc_mb_var_sum, s->bit_rate/1000, (int)fps

793

);

794

}

795

796

if (q<qmin) q=qmin;

797

else if(q>qmax) q=qmax;

798

799

if(s->adaptive_quant)

800

adaptive_quantization(s, q);

801

else

802

q= (int)(q + 0.5);

803

804

if(!dry_run){

805

rcc->last_qscale= q;

806

rcc->last_mc_mb_var_sum= pic->mc_mb_var_sum;

807

rcc->last_mb_var_sum= pic->mb_var_sum;

808

}

809

#if 0

810

{

811

static int mvsum=0, texsum=0;

812

mvsum += s->mv_bits;

813

texsum += s->i_tex_bits + s->p_tex_bits;

814

printf("%d %d//\n\n", mvsum, texsum);

815

}

816

#endif

817

return q;

818

}

819

820

//----------------------------------------------

821

// 2-Pass code

822

823

static int init_pass2(MpegEncContext *s)

824

{

825

RateControlContext *rcc= &s->rc_context;

826

AVCodecContext *a= s->avctx;

827

int i, toobig;

828

double fps= 1/av_q2d(s->avctx->time_base);

829

double complexity[5]={0,0,0,0,0}; // aproximate bits at quant=1

830

uint64_t const_bits[5]={0,0,0,0,0}; // quantizer independent bits

831

uint64_t all_const_bits;

832

uint64_t all_available_bits= (uint64_t)(s->bit_rate*(double)rcc->num_entries/fps);

833

double rate_factor=0;

834

double step;

835

//int last_i_frame=-10000000;

836

const int filter_size= (int)(a->qblur*4) | 1;

837

double expected_bits;

838

double *qscale, *blurred_qscale, qscale_sum;

839

840

/* find complexity & const_bits & decide the pict_types */

841

for(i=0; i<rcc->num_entries; i++){

842

RateControlEntry *rce= &rcc->entry[i];

843

844

rce->new_pict_type= rce->pict_type;

845

rcc->i_cplx_sum [rce->pict_type] += rce->i_tex_bits*rce->qscale;

846

rcc->p_cplx_sum [rce->pict_type] += rce->p_tex_bits*rce->qscale;

847

rcc->mv_bits_sum[rce->pict_type] += rce->mv_bits;

848

rcc->frame_count[rce->pict_type] ++;

849

850

complexity[rce->new_pict_type]+= (rce->i_tex_bits+ rce->p_tex_bits)*(double)rce->qscale;

851

const_bits[rce->new_pict_type]+= rce->mv_bits + rce->misc_bits;

852

}

853

all_const_bits= const_bits[FF_I_TYPE] + const_bits[FF_P_TYPE] + const_bits[FF_B_TYPE];

854

855

if(all_available_bits < all_const_bits){

856

av_log(s->avctx, AV_LOG_ERROR, "requested bitrate is too low\n");

857

return -1;

858

}

859

860

qscale= av_malloc(sizeof(double)*rcc->num_entries);

861

blurred_qscale= av_malloc(sizeof(double)*rcc->num_entries);

862

toobig = 0;

863

864

for(step=256*256; step>0.0000001; step*=0.5){

865

expected_bits=0;

866

rate_factor+= step;

867

868

rcc->buffer_index= s->avctx->rc_buffer_size/2;

869

870

/* find qscale */

871

for(i=0; i<rcc->num_entries; i++){

872

qscale[i]= get_qscale(s, &rcc->entry[i], rate_factor, i);

873

}

874

assert(filter_size%2==1);

875

876

/* fixed I/B QP relative to P mode */

877

for(i=rcc->num_entries-1; i>=0; i--){

878

RateControlEntry *rce= &rcc->entry[i];

879

880

qscale[i]= get_diff_limited_q(s, rce, qscale[i]);

881

}

882

883

/* smooth curve */

884

for(i=0; i<rcc->num_entries; i++){

885

RateControlEntry *rce= &rcc->entry[i];

886

const int pict_type= rce->new_pict_type;

887

int j;

888

double q=0.0, sum=0.0;

889

890

for(j=0; j<filter_size; j++){

891

int index= i+j-filter_size/2;

892

double d= index-i;

893

double coeff= a->qblur==0 ? 1.0 : exp(-d*d/(a->qblur * a->qblur));

894

895

if(index < 0 || index >= rcc->num_entries) continue;

896

if(pict_type != rcc->entry[index].new_pict_type) continue;

897

q+= qscale[index] * coeff;

898

sum+= coeff;

899

}

900

blurred_qscale[i]= q/sum;

901

}

902

903

/* find expected bits */

904

for(i=0; i<rcc->num_entries; i++){

905

RateControlEntry *rce= &rcc->entry[i];

906

double bits;

907

rce->new_qscale= modify_qscale(s, rce, blurred_qscale[i], i);

908

bits= qp2bits(rce, rce->new_qscale) + rce->mv_bits + rce->misc_bits;

909

//printf("%d %f\n", rce->new_bits, blurred_qscale[i]);

910

bits += 8*ff_vbv_update(s, bits);

911

912

rce->expected_bits= expected_bits;

913

expected_bits += bits;

914

}

915

916

917

av_log(s->avctx, AV_LOG_INFO,

918

"expected_bits: %f all_available_bits: %d rate_factor: %f\n",

919

expected_bits, (int)all_available_bits, rate_factor);

920

921

if(expected_bits > all_available_bits) {

922

rate_factor-= step;

923

++toobig;

924

}

925

}

926

av_free(qscale);

927

av_free(blurred_qscale);

928

929

/* check bitrate calculations and print info */

930

qscale_sum = 0.0;

931

for(i=0; i<rcc->num_entries; i++){

932

/* av_log(s->avctx, AV_LOG_DEBUG, "[lavc rc] entry[%d].new_qscale = %.3f qp = %.3f\n",

933

i, rcc->entry[i].new_qscale, rcc->entry[i].new_qscale / FF_QP2LAMBDA); */

934

qscale_sum += av_clip(rcc->entry[i].new_qscale / FF_QP2LAMBDA, s->avctx->qmin, s->avctx->qmax);

935

}

936

assert(toobig <= 40);

937

av_log(s->avctx, AV_LOG_DEBUG,

938

"[lavc rc] requested bitrate: %d bps expected bitrate: %d bps\n",

939

s->bit_rate,

940

(int)(expected_bits / ((double)all_available_bits/s->bit_rate)));

941

av_log(s->avctx, AV_LOG_DEBUG,

942

"[lavc rc] estimated target average qp: %.3f\n",

943

(float)qscale_sum / rcc->num_entries);

944

if (toobig == 0) {

945

av_log(s->avctx, AV_LOG_INFO,

946

"[lavc rc] Using all of requested bitrate is not "

947

"necessary for this video with these parameters.\n");

948

} else if (toobig == 40) {

949

av_log(s->avctx, AV_LOG_ERROR,

950

"[lavc rc] Error: bitrate too low for this video "

951

"with these parameters.\n");

952

return -1;

953

} else if (fabs(expected_bits/all_available_bits - 1.0) > 0.01) {

954

av_log(s->avctx, AV_LOG_ERROR,

955

"[lavc rc] Error: 2pass curve failed to converge\n");

956

return -1;

957

}

958

959

return 0;

960

}

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