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2ba45a60 DM |
1 | /* |
2 | * Rate control for video encoders | |
3 | * | |
4 | * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> | |
5 | * | |
6 | * This file is part of FFmpeg. | |
7 | * | |
8 | * FFmpeg is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; either | |
11 | * version 2.1 of the License, or (at your option) any later version. | |
12 | * | |
13 | * FFmpeg is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * Lesser General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public | |
19 | * License along with FFmpeg; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | */ | |
22 | ||
23 | /** | |
24 | * @file | |
25 | * Rate control for video encoders. | |
26 | */ | |
27 | ||
28 | #include "libavutil/attributes.h" | |
29 | #include "avcodec.h" | |
30 | #include "ratecontrol.h" | |
31 | #include "mpegutils.h" | |
32 | #include "mpegvideo.h" | |
33 | #include "libavutil/eval.h" | |
34 | ||
35 | #undef NDEBUG // Always check asserts, the speed effect is far too small to disable them. | |
36 | #include <assert.h> | |
37 | ||
38 | #ifndef M_E | |
39 | #define M_E 2.718281828 | |
40 | #endif | |
41 | ||
42 | static int init_pass2(MpegEncContext *s); | |
43 | static double get_qscale(MpegEncContext *s, RateControlEntry *rce, | |
44 | double rate_factor, int frame_num); | |
45 | ||
46 | void ff_write_pass1_stats(MpegEncContext *s) | |
47 | { | |
48 | snprintf(s->avctx->stats_out, 256, | |
49 | "in:%d out:%d type:%d q:%d itex:%d ptex:%d mv:%d misc:%d " | |
50 | "fcode:%d bcode:%d mc-var:%"PRId64" var:%"PRId64" icount:%d skipcount:%d hbits:%d;\n", | |
51 | s->current_picture_ptr->f->display_picture_number, | |
52 | s->current_picture_ptr->f->coded_picture_number, | |
53 | s->pict_type, | |
54 | s->current_picture.f->quality, | |
55 | s->i_tex_bits, | |
56 | s->p_tex_bits, | |
57 | s->mv_bits, | |
58 | s->misc_bits, | |
59 | s->f_code, | |
60 | s->b_code, | |
61 | s->current_picture.mc_mb_var_sum, | |
62 | s->current_picture.mb_var_sum, | |
63 | s->i_count, s->skip_count, | |
64 | s->header_bits); | |
65 | } | |
66 | ||
67 | static double get_fps(AVCodecContext *avctx) | |
68 | { | |
69 | return 1.0 / av_q2d(avctx->time_base) / FFMAX(avctx->ticks_per_frame, 1); | |
70 | } | |
71 | ||
72 | static inline double qp2bits(RateControlEntry *rce, double qp) | |
73 | { | |
74 | if (qp <= 0.0) { | |
75 | av_log(NULL, AV_LOG_ERROR, "qp<=0.0\n"); | |
76 | } | |
77 | return rce->qscale * (double)(rce->i_tex_bits + rce->p_tex_bits + 1) / qp; | |
78 | } | |
79 | ||
80 | static inline double bits2qp(RateControlEntry *rce, double bits) | |
81 | { | |
82 | if (bits < 0.9) { | |
83 | av_log(NULL, AV_LOG_ERROR, "bits<0.9\n"); | |
84 | } | |
85 | return rce->qscale * (double)(rce->i_tex_bits + rce->p_tex_bits + 1) / bits; | |
86 | } | |
87 | ||
88 | av_cold int ff_rate_control_init(MpegEncContext *s) | |
89 | { | |
90 | RateControlContext *rcc = &s->rc_context; | |
91 | int i, res; | |
92 | static const char * const const_names[] = { | |
93 | "PI", | |
94 | "E", | |
95 | "iTex", | |
96 | "pTex", | |
97 | "tex", | |
98 | "mv", | |
99 | "fCode", | |
100 | "iCount", | |
101 | "mcVar", | |
102 | "var", | |
103 | "isI", | |
104 | "isP", | |
105 | "isB", | |
106 | "avgQP", | |
107 | "qComp", | |
108 | #if 0 | |
109 | "lastIQP", | |
110 | "lastPQP", | |
111 | "lastBQP", | |
112 | "nextNonBQP", | |
113 | #endif | |
114 | "avgIITex", | |
115 | "avgPITex", | |
116 | "avgPPTex", | |
117 | "avgBPTex", | |
118 | "avgTex", | |
119 | NULL | |
120 | }; | |
121 | static double (* const func1[])(void *, double) = { | |
122 | (void *)bits2qp, | |
123 | (void *)qp2bits, | |
124 | NULL | |
125 | }; | |
126 | static const char * const func1_names[] = { | |
127 | "bits2qp", | |
128 | "qp2bits", | |
129 | NULL | |
130 | }; | |
131 | emms_c(); | |
132 | ||
133 | if (!s->avctx->rc_max_available_vbv_use && s->avctx->rc_buffer_size) { | |
134 | if (s->avctx->rc_max_rate) { | |
135 | s->avctx->rc_max_available_vbv_use = av_clipf(s->avctx->rc_max_rate/(s->avctx->rc_buffer_size*get_fps(s->avctx)), 1.0/3, 1.0); | |
136 | } else | |
137 | s->avctx->rc_max_available_vbv_use = 1.0; | |
138 | } | |
139 | ||
140 | res = av_expr_parse(&rcc->rc_eq_eval, | |
f6fa7814 | 141 | s->rc_eq ? s->rc_eq : "tex^qComp", |
2ba45a60 DM |
142 | const_names, func1_names, func1, |
143 | NULL, NULL, 0, s->avctx); | |
144 | if (res < 0) { | |
f6fa7814 | 145 | av_log(s->avctx, AV_LOG_ERROR, "Error parsing rc_eq \"%s\"\n", s->rc_eq); |
2ba45a60 DM |
146 | return res; |
147 | } | |
148 | ||
149 | for (i = 0; i < 5; i++) { | |
150 | rcc->pred[i].coeff = FF_QP2LAMBDA * 7.0; | |
151 | rcc->pred[i].count = 1.0; | |
152 | rcc->pred[i].decay = 0.4; | |
153 | ||
154 | rcc->i_cplx_sum [i] = | |
155 | rcc->p_cplx_sum [i] = | |
156 | rcc->mv_bits_sum[i] = | |
157 | rcc->qscale_sum [i] = | |
158 | rcc->frame_count[i] = 1; // 1 is better because of 1/0 and such | |
159 | ||
160 | rcc->last_qscale_for[i] = FF_QP2LAMBDA * 5; | |
161 | } | |
162 | rcc->buffer_index = s->avctx->rc_initial_buffer_occupancy; | |
163 | if (!rcc->buffer_index) | |
164 | rcc->buffer_index = s->avctx->rc_buffer_size * 3 / 4; | |
165 | ||
166 | if (s->flags & CODEC_FLAG_PASS2) { | |
167 | int i; | |
168 | char *p; | |
169 | ||
170 | /* find number of pics */ | |
171 | p = s->avctx->stats_in; | |
172 | for (i = -1; p; i++) | |
173 | p = strchr(p + 1, ';'); | |
174 | i += s->max_b_frames; | |
175 | if (i <= 0 || i >= INT_MAX / sizeof(RateControlEntry)) | |
176 | return -1; | |
177 | rcc->entry = av_mallocz(i * sizeof(RateControlEntry)); | |
178 | rcc->num_entries = i; | |
179 | ||
180 | /* init all to skipped p frames | |
181 | * (with b frames we might have a not encoded frame at the end FIXME) */ | |
182 | for (i = 0; i < rcc->num_entries; i++) { | |
183 | RateControlEntry *rce = &rcc->entry[i]; | |
184 | ||
185 | rce->pict_type = rce->new_pict_type = AV_PICTURE_TYPE_P; | |
186 | rce->qscale = rce->new_qscale = FF_QP2LAMBDA * 2; | |
187 | rce->misc_bits = s->mb_num + 10; | |
188 | rce->mb_var_sum = s->mb_num * 100; | |
189 | } | |
190 | ||
191 | /* read stats */ | |
192 | p = s->avctx->stats_in; | |
193 | for (i = 0; i < rcc->num_entries - s->max_b_frames; i++) { | |
194 | RateControlEntry *rce; | |
195 | int picture_number; | |
196 | int e; | |
197 | char *next; | |
198 | ||
199 | next = strchr(p, ';'); | |
200 | if (next) { | |
201 | (*next) = 0; // sscanf in unbelievably slow on looong strings // FIXME copy / do not write | |
202 | next++; | |
203 | } | |
204 | e = sscanf(p, " in:%d ", &picture_number); | |
205 | ||
206 | assert(picture_number >= 0); | |
207 | assert(picture_number < rcc->num_entries); | |
208 | rce = &rcc->entry[picture_number]; | |
209 | ||
210 | 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:%"SCNd64" var:%"SCNd64" icount:%d skipcount:%d hbits:%d", | |
211 | &rce->pict_type, &rce->qscale, &rce->i_tex_bits, &rce->p_tex_bits, | |
212 | &rce->mv_bits, &rce->misc_bits, | |
213 | &rce->f_code, &rce->b_code, | |
214 | &rce->mc_mb_var_sum, &rce->mb_var_sum, | |
215 | &rce->i_count, &rce->skip_count, &rce->header_bits); | |
216 | if (e != 14) { | |
217 | av_log(s->avctx, AV_LOG_ERROR, | |
218 | "statistics are damaged at line %d, parser out=%d\n", | |
219 | i, e); | |
220 | return -1; | |
221 | } | |
222 | ||
223 | p = next; | |
224 | } | |
225 | ||
226 | if (init_pass2(s) < 0) | |
227 | return -1; | |
228 | ||
229 | // FIXME maybe move to end | |
230 | if ((s->flags & CODEC_FLAG_PASS2) && s->avctx->rc_strategy == FF_RC_STRATEGY_XVID) { | |
231 | #if CONFIG_LIBXVID | |
232 | return ff_xvid_rate_control_init(s); | |
233 | #else | |
234 | av_log(s->avctx, AV_LOG_ERROR, | |
235 | "Xvid ratecontrol requires libavcodec compiled with Xvid support.\n"); | |
236 | return -1; | |
237 | #endif | |
238 | } | |
239 | } | |
240 | ||
241 | if (!(s->flags & CODEC_FLAG_PASS2)) { | |
242 | rcc->short_term_qsum = 0.001; | |
243 | rcc->short_term_qcount = 0.001; | |
244 | ||
245 | rcc->pass1_rc_eq_output_sum = 0.001; | |
246 | rcc->pass1_wanted_bits = 0.001; | |
247 | ||
248 | if (s->avctx->qblur > 1.0) { | |
249 | av_log(s->avctx, AV_LOG_ERROR, "qblur too large\n"); | |
250 | return -1; | |
251 | } | |
252 | /* init stuff with the user specified complexity */ | |
f6fa7814 | 253 | if (s->rc_initial_cplx) { |
2ba45a60 | 254 | for (i = 0; i < 60 * 30; i++) { |
f6fa7814 | 255 | double bits = s->rc_initial_cplx * (i / 10000.0 + 1.0) * s->mb_num; |
2ba45a60 DM |
256 | RateControlEntry rce; |
257 | ||
258 | if (i % ((s->gop_size + 3) / 4) == 0) | |
259 | rce.pict_type = AV_PICTURE_TYPE_I; | |
260 | else if (i % (s->max_b_frames + 1)) | |
261 | rce.pict_type = AV_PICTURE_TYPE_B; | |
262 | else | |
263 | rce.pict_type = AV_PICTURE_TYPE_P; | |
264 | ||
265 | rce.new_pict_type = rce.pict_type; | |
266 | rce.mc_mb_var_sum = bits * s->mb_num / 100000; | |
267 | rce.mb_var_sum = s->mb_num; | |
268 | ||
269 | rce.qscale = FF_QP2LAMBDA * 2; | |
270 | rce.f_code = 2; | |
271 | rce.b_code = 1; | |
272 | rce.misc_bits = 1; | |
273 | ||
274 | if (s->pict_type == AV_PICTURE_TYPE_I) { | |
275 | rce.i_count = s->mb_num; | |
276 | rce.i_tex_bits = bits; | |
277 | rce.p_tex_bits = 0; | |
278 | rce.mv_bits = 0; | |
279 | } else { | |
280 | rce.i_count = 0; // FIXME we do know this approx | |
281 | rce.i_tex_bits = 0; | |
282 | rce.p_tex_bits = bits * 0.9; | |
283 | rce.mv_bits = bits * 0.1; | |
284 | } | |
285 | rcc->i_cplx_sum[rce.pict_type] += rce.i_tex_bits * rce.qscale; | |
286 | rcc->p_cplx_sum[rce.pict_type] += rce.p_tex_bits * rce.qscale; | |
287 | rcc->mv_bits_sum[rce.pict_type] += rce.mv_bits; | |
288 | rcc->frame_count[rce.pict_type]++; | |
289 | ||
290 | get_qscale(s, &rce, rcc->pass1_wanted_bits / rcc->pass1_rc_eq_output_sum, i); | |
291 | ||
292 | // FIXME misbehaves a little for variable fps | |
293 | rcc->pass1_wanted_bits += s->bit_rate / get_fps(s->avctx); | |
294 | } | |
295 | } | |
296 | } | |
297 | ||
298 | return 0; | |
299 | } | |
300 | ||
301 | av_cold void ff_rate_control_uninit(MpegEncContext *s) | |
302 | { | |
303 | RateControlContext *rcc = &s->rc_context; | |
304 | emms_c(); | |
305 | ||
306 | av_expr_free(rcc->rc_eq_eval); | |
307 | av_freep(&rcc->entry); | |
308 | ||
309 | #if CONFIG_LIBXVID | |
310 | if ((s->flags & CODEC_FLAG_PASS2) && s->avctx->rc_strategy == FF_RC_STRATEGY_XVID) | |
311 | ff_xvid_rate_control_uninit(s); | |
312 | #endif | |
313 | } | |
314 | ||
315 | int ff_vbv_update(MpegEncContext *s, int frame_size) | |
316 | { | |
317 | RateControlContext *rcc = &s->rc_context; | |
318 | const double fps = get_fps(s->avctx); | |
319 | const int buffer_size = s->avctx->rc_buffer_size; | |
320 | const double min_rate = s->avctx->rc_min_rate / fps; | |
321 | const double max_rate = s->avctx->rc_max_rate / fps; | |
322 | ||
323 | av_dlog(s, "%d %f %d %f %f\n", | |
324 | buffer_size, rcc->buffer_index, frame_size, min_rate, max_rate); | |
325 | ||
326 | if (buffer_size) { | |
327 | int left; | |
328 | ||
329 | rcc->buffer_index -= frame_size; | |
330 | if (rcc->buffer_index < 0) { | |
331 | av_log(s->avctx, AV_LOG_ERROR, "rc buffer underflow\n"); | |
332 | if (frame_size > max_rate && s->qscale == s->avctx->qmax) { | |
333 | av_log(s->avctx, AV_LOG_ERROR, "max bitrate possibly too small or try trellis with large lmax or increase qmax\n"); | |
334 | } | |
335 | rcc->buffer_index = 0; | |
336 | } | |
337 | ||
338 | left = buffer_size - rcc->buffer_index - 1; | |
339 | rcc->buffer_index += av_clip(left, min_rate, max_rate); | |
340 | ||
341 | if (rcc->buffer_index > buffer_size) { | |
342 | int stuffing = ceil((rcc->buffer_index - buffer_size) / 8); | |
343 | ||
344 | if (stuffing < 4 && s->codec_id == AV_CODEC_ID_MPEG4) | |
345 | stuffing = 4; | |
346 | rcc->buffer_index -= 8 * stuffing; | |
347 | ||
348 | if (s->avctx->debug & FF_DEBUG_RC) | |
349 | av_log(s->avctx, AV_LOG_DEBUG, "stuffing %d bytes\n", stuffing); | |
350 | ||
351 | return stuffing; | |
352 | } | |
353 | } | |
354 | return 0; | |
355 | } | |
356 | ||
357 | /** | |
358 | * Modify the bitrate curve from pass1 for one frame. | |
359 | */ | |
360 | static double get_qscale(MpegEncContext *s, RateControlEntry *rce, | |
361 | double rate_factor, int frame_num) | |
362 | { | |
363 | RateControlContext *rcc = &s->rc_context; | |
364 | AVCodecContext *a = s->avctx; | |
365 | const int pict_type = rce->new_pict_type; | |
366 | const double mb_num = s->mb_num; | |
367 | double q, bits; | |
368 | int i; | |
369 | ||
370 | double const_values[] = { | |
371 | M_PI, | |
372 | M_E, | |
373 | rce->i_tex_bits * rce->qscale, | |
374 | rce->p_tex_bits * rce->qscale, | |
375 | (rce->i_tex_bits + rce->p_tex_bits) * (double)rce->qscale, | |
376 | rce->mv_bits / mb_num, | |
377 | rce->pict_type == AV_PICTURE_TYPE_B ? (rce->f_code + rce->b_code) * 0.5 : rce->f_code, | |
378 | rce->i_count / mb_num, | |
379 | rce->mc_mb_var_sum / mb_num, | |
380 | rce->mb_var_sum / mb_num, | |
381 | rce->pict_type == AV_PICTURE_TYPE_I, | |
382 | rce->pict_type == AV_PICTURE_TYPE_P, | |
383 | rce->pict_type == AV_PICTURE_TYPE_B, | |
384 | rcc->qscale_sum[pict_type] / (double)rcc->frame_count[pict_type], | |
385 | a->qcompress, | |
386 | #if 0 | |
387 | rcc->last_qscale_for[AV_PICTURE_TYPE_I], | |
388 | rcc->last_qscale_for[AV_PICTURE_TYPE_P], | |
389 | rcc->last_qscale_for[AV_PICTURE_TYPE_B], | |
390 | rcc->next_non_b_qscale, | |
391 | #endif | |
392 | rcc->i_cplx_sum[AV_PICTURE_TYPE_I] / (double)rcc->frame_count[AV_PICTURE_TYPE_I], | |
393 | rcc->i_cplx_sum[AV_PICTURE_TYPE_P] / (double)rcc->frame_count[AV_PICTURE_TYPE_P], | |
394 | rcc->p_cplx_sum[AV_PICTURE_TYPE_P] / (double)rcc->frame_count[AV_PICTURE_TYPE_P], | |
395 | rcc->p_cplx_sum[AV_PICTURE_TYPE_B] / (double)rcc->frame_count[AV_PICTURE_TYPE_B], | |
396 | (rcc->i_cplx_sum[pict_type] + rcc->p_cplx_sum[pict_type]) / (double)rcc->frame_count[pict_type], | |
397 | 0 | |
398 | }; | |
399 | ||
400 | bits = av_expr_eval(rcc->rc_eq_eval, const_values, rce); | |
401 | if (isnan(bits)) { | |
f6fa7814 | 402 | av_log(s->avctx, AV_LOG_ERROR, "Error evaluating rc_eq \"%s\"\n", s->rc_eq); |
2ba45a60 DM |
403 | return -1; |
404 | } | |
405 | ||
406 | rcc->pass1_rc_eq_output_sum += bits; | |
407 | bits *= rate_factor; | |
408 | if (bits < 0.0) | |
409 | bits = 0.0; | |
410 | bits += 1.0; // avoid 1/0 issues | |
411 | ||
412 | /* user override */ | |
413 | for (i = 0; i < s->avctx->rc_override_count; i++) { | |
414 | RcOverride *rco = s->avctx->rc_override; | |
415 | if (rco[i].start_frame > frame_num) | |
416 | continue; | |
417 | if (rco[i].end_frame < frame_num) | |
418 | continue; | |
419 | ||
420 | if (rco[i].qscale) | |
421 | bits = qp2bits(rce, rco[i].qscale); // FIXME move at end to really force it? | |
422 | else | |
423 | bits *= rco[i].quality_factor; | |
424 | } | |
425 | ||
426 | q = bits2qp(rce, bits); | |
427 | ||
428 | /* I/B difference */ | |
429 | if (pict_type == AV_PICTURE_TYPE_I && s->avctx->i_quant_factor < 0.0) | |
430 | q = -q * s->avctx->i_quant_factor + s->avctx->i_quant_offset; | |
431 | else if (pict_type == AV_PICTURE_TYPE_B && s->avctx->b_quant_factor < 0.0) | |
432 | q = -q * s->avctx->b_quant_factor + s->avctx->b_quant_offset; | |
433 | if (q < 1) | |
434 | q = 1; | |
435 | ||
436 | return q; | |
437 | } | |
438 | ||
439 | static double get_diff_limited_q(MpegEncContext *s, RateControlEntry *rce, double q) | |
440 | { | |
441 | RateControlContext *rcc = &s->rc_context; | |
442 | AVCodecContext *a = s->avctx; | |
443 | const int pict_type = rce->new_pict_type; | |
444 | const double last_p_q = rcc->last_qscale_for[AV_PICTURE_TYPE_P]; | |
445 | const double last_non_b_q = rcc->last_qscale_for[rcc->last_non_b_pict_type]; | |
446 | ||
447 | if (pict_type == AV_PICTURE_TYPE_I && | |
448 | (a->i_quant_factor > 0.0 || rcc->last_non_b_pict_type == AV_PICTURE_TYPE_P)) | |
449 | q = last_p_q * FFABS(a->i_quant_factor) + a->i_quant_offset; | |
450 | else if (pict_type == AV_PICTURE_TYPE_B && | |
451 | a->b_quant_factor > 0.0) | |
452 | q = last_non_b_q * a->b_quant_factor + a->b_quant_offset; | |
453 | if (q < 1) | |
454 | q = 1; | |
455 | ||
456 | /* last qscale / qdiff stuff */ | |
457 | if (rcc->last_non_b_pict_type == pict_type || pict_type != AV_PICTURE_TYPE_I) { | |
458 | double last_q = rcc->last_qscale_for[pict_type]; | |
459 | const int maxdiff = FF_QP2LAMBDA * a->max_qdiff; | |
460 | ||
461 | if (q > last_q + maxdiff) | |
462 | q = last_q + maxdiff; | |
463 | else if (q < last_q - maxdiff) | |
464 | q = last_q - maxdiff; | |
465 | } | |
466 | ||
467 | rcc->last_qscale_for[pict_type] = q; // Note we cannot do that after blurring | |
468 | ||
469 | if (pict_type != AV_PICTURE_TYPE_B) | |
470 | rcc->last_non_b_pict_type = pict_type; | |
471 | ||
472 | return q; | |
473 | } | |
474 | ||
475 | /** | |
476 | * Get the qmin & qmax for pict_type. | |
477 | */ | |
478 | static void get_qminmax(int *qmin_ret, int *qmax_ret, MpegEncContext *s, int pict_type) | |
479 | { | |
f6fa7814 DM |
480 | int qmin = s->lmin; |
481 | int qmax = s->lmax; | |
2ba45a60 DM |
482 | |
483 | assert(qmin <= qmax); | |
484 | ||
485 | switch (pict_type) { | |
486 | case AV_PICTURE_TYPE_B: | |
487 | qmin = (int)(qmin * FFABS(s->avctx->b_quant_factor) + s->avctx->b_quant_offset + 0.5); | |
488 | qmax = (int)(qmax * FFABS(s->avctx->b_quant_factor) + s->avctx->b_quant_offset + 0.5); | |
489 | break; | |
490 | case AV_PICTURE_TYPE_I: | |
491 | qmin = (int)(qmin * FFABS(s->avctx->i_quant_factor) + s->avctx->i_quant_offset + 0.5); | |
492 | qmax = (int)(qmax * FFABS(s->avctx->i_quant_factor) + s->avctx->i_quant_offset + 0.5); | |
493 | break; | |
494 | } | |
495 | ||
496 | qmin = av_clip(qmin, 1, FF_LAMBDA_MAX); | |
497 | qmax = av_clip(qmax, 1, FF_LAMBDA_MAX); | |
498 | ||
499 | if (qmax < qmin) | |
500 | qmax = qmin; | |
501 | ||
502 | *qmin_ret = qmin; | |
503 | *qmax_ret = qmax; | |
504 | } | |
505 | ||
506 | static double modify_qscale(MpegEncContext *s, RateControlEntry *rce, | |
507 | double q, int frame_num) | |
508 | { | |
509 | RateControlContext *rcc = &s->rc_context; | |
510 | const double buffer_size = s->avctx->rc_buffer_size; | |
511 | const double fps = get_fps(s->avctx); | |
512 | const double min_rate = s->avctx->rc_min_rate / fps; | |
513 | const double max_rate = s->avctx->rc_max_rate / fps; | |
514 | const int pict_type = rce->new_pict_type; | |
515 | int qmin, qmax; | |
516 | ||
517 | get_qminmax(&qmin, &qmax, s, pict_type); | |
518 | ||
519 | /* modulation */ | |
f6fa7814 DM |
520 | if (s->rc_qmod_freq && |
521 | frame_num % s->rc_qmod_freq == 0 && | |
2ba45a60 | 522 | pict_type == AV_PICTURE_TYPE_P) |
f6fa7814 | 523 | q *= s->rc_qmod_amp; |
2ba45a60 DM |
524 | |
525 | /* buffer overflow/underflow protection */ | |
526 | if (buffer_size) { | |
527 | double expected_size = rcc->buffer_index; | |
528 | double q_limit; | |
529 | ||
530 | if (min_rate) { | |
531 | double d = 2 * (buffer_size - expected_size) / buffer_size; | |
532 | if (d > 1.0) | |
533 | d = 1.0; | |
534 | else if (d < 0.0001) | |
535 | d = 0.0001; | |
f6fa7814 | 536 | q *= pow(d, 1.0 / s->rc_buffer_aggressivity); |
2ba45a60 DM |
537 | |
538 | q_limit = bits2qp(rce, | |
539 | FFMAX((min_rate - buffer_size + rcc->buffer_index) * | |
540 | s->avctx->rc_min_vbv_overflow_use, 1)); | |
541 | ||
542 | if (q > q_limit) { | |
543 | if (s->avctx->debug & FF_DEBUG_RC) | |
544 | av_log(s->avctx, AV_LOG_DEBUG, | |
545 | "limiting QP %f -> %f\n", q, q_limit); | |
546 | q = q_limit; | |
547 | } | |
548 | } | |
549 | ||
550 | if (max_rate) { | |
551 | double d = 2 * expected_size / buffer_size; | |
552 | if (d > 1.0) | |
553 | d = 1.0; | |
554 | else if (d < 0.0001) | |
555 | d = 0.0001; | |
f6fa7814 | 556 | q /= pow(d, 1.0 / s->rc_buffer_aggressivity); |
2ba45a60 DM |
557 | |
558 | q_limit = bits2qp(rce, | |
559 | FFMAX(rcc->buffer_index * | |
560 | s->avctx->rc_max_available_vbv_use, | |
561 | 1)); | |
562 | if (q < q_limit) { | |
563 | if (s->avctx->debug & FF_DEBUG_RC) | |
564 | av_log(s->avctx, AV_LOG_DEBUG, | |
565 | "limiting QP %f -> %f\n", q, q_limit); | |
566 | q = q_limit; | |
567 | } | |
568 | } | |
569 | } | |
570 | av_dlog(s, "q:%f max:%f min:%f size:%f index:%f agr:%f\n", | |
571 | q, max_rate, min_rate, buffer_size, rcc->buffer_index, | |
f6fa7814 DM |
572 | s->rc_buffer_aggressivity); |
573 | if (s->rc_qsquish == 0.0 || qmin == qmax) { | |
2ba45a60 DM |
574 | if (q < qmin) |
575 | q = qmin; | |
576 | else if (q > qmax) | |
577 | q = qmax; | |
578 | } else { | |
579 | double min2 = log(qmin); | |
580 | double max2 = log(qmax); | |
581 | ||
582 | q = log(q); | |
583 | q = (q - min2) / (max2 - min2) - 0.5; | |
584 | q *= -4.0; | |
585 | q = 1.0 / (1.0 + exp(q)); | |
586 | q = q * (max2 - min2) + min2; | |
587 | ||
588 | q = exp(q); | |
589 | } | |
590 | ||
591 | return q; | |
592 | } | |
593 | ||
594 | // ---------------------------------- | |
595 | // 1 Pass Code | |
596 | ||
597 | static double predict_size(Predictor *p, double q, double var) | |
598 | { | |
599 | return p->coeff * var / (q * p->count); | |
600 | } | |
601 | ||
602 | static void update_predictor(Predictor *p, double q, double var, double size) | |
603 | { | |
604 | double new_coeff = size * q / (var + 1); | |
605 | if (var < 10) | |
606 | return; | |
607 | ||
608 | p->count *= p->decay; | |
609 | p->coeff *= p->decay; | |
610 | p->count++; | |
611 | p->coeff += new_coeff; | |
612 | } | |
613 | ||
614 | static void adaptive_quantization(MpegEncContext *s, double q) | |
615 | { | |
616 | int i; | |
617 | const float lumi_masking = s->avctx->lumi_masking / (128.0 * 128.0); | |
618 | const float dark_masking = s->avctx->dark_masking / (128.0 * 128.0); | |
619 | const float temp_cplx_masking = s->avctx->temporal_cplx_masking; | |
620 | const float spatial_cplx_masking = s->avctx->spatial_cplx_masking; | |
621 | const float p_masking = s->avctx->p_masking; | |
f6fa7814 | 622 | const float border_masking = s->border_masking; |
2ba45a60 DM |
623 | float bits_sum = 0.0; |
624 | float cplx_sum = 0.0; | |
625 | float *cplx_tab = s->cplx_tab; | |
626 | float *bits_tab = s->bits_tab; | |
627 | const int qmin = s->avctx->mb_lmin; | |
628 | const int qmax = s->avctx->mb_lmax; | |
629 | Picture *const pic = &s->current_picture; | |
630 | const int mb_width = s->mb_width; | |
631 | const int mb_height = s->mb_height; | |
632 | ||
633 | for (i = 0; i < s->mb_num; i++) { | |
634 | const int mb_xy = s->mb_index2xy[i]; | |
635 | float temp_cplx = sqrt(pic->mc_mb_var[mb_xy]); // FIXME merge in pow() | |
636 | float spat_cplx = sqrt(pic->mb_var[mb_xy]); | |
637 | const int lumi = pic->mb_mean[mb_xy]; | |
638 | float bits, cplx, factor; | |
639 | int mb_x = mb_xy % s->mb_stride; | |
640 | int mb_y = mb_xy / s->mb_stride; | |
641 | int mb_distance; | |
642 | float mb_factor = 0.0; | |
643 | if (spat_cplx < 4) | |
644 | spat_cplx = 4; // FIXME finetune | |
645 | if (temp_cplx < 4) | |
646 | temp_cplx = 4; // FIXME finetune | |
647 | ||
648 | if ((s->mb_type[mb_xy] & CANDIDATE_MB_TYPE_INTRA)) { // FIXME hq mode | |
649 | cplx = spat_cplx; | |
650 | factor = 1.0 + p_masking; | |
651 | } else { | |
652 | cplx = temp_cplx; | |
653 | factor = pow(temp_cplx, -temp_cplx_masking); | |
654 | } | |
655 | factor *= pow(spat_cplx, -spatial_cplx_masking); | |
656 | ||
657 | if (lumi > 127) | |
658 | factor *= (1.0 - (lumi - 128) * (lumi - 128) * lumi_masking); | |
659 | else | |
660 | factor *= (1.0 - (lumi - 128) * (lumi - 128) * dark_masking); | |
661 | ||
662 | if (mb_x < mb_width / 5) { | |
663 | mb_distance = mb_width / 5 - mb_x; | |
664 | mb_factor = (float)mb_distance / (float)(mb_width / 5); | |
665 | } else if (mb_x > 4 * mb_width / 5) { | |
666 | mb_distance = mb_x - 4 * mb_width / 5; | |
667 | mb_factor = (float)mb_distance / (float)(mb_width / 5); | |
668 | } | |
669 | if (mb_y < mb_height / 5) { | |
670 | mb_distance = mb_height / 5 - mb_y; | |
671 | mb_factor = FFMAX(mb_factor, | |
672 | (float)mb_distance / (float)(mb_height / 5)); | |
673 | } else if (mb_y > 4 * mb_height / 5) { | |
674 | mb_distance = mb_y - 4 * mb_height / 5; | |
675 | mb_factor = FFMAX(mb_factor, | |
676 | (float)mb_distance / (float)(mb_height / 5)); | |
677 | } | |
678 | ||
679 | factor *= 1.0 - border_masking * mb_factor; | |
680 | ||
681 | if (factor < 0.00001) | |
682 | factor = 0.00001; | |
683 | ||
684 | bits = cplx * factor; | |
685 | cplx_sum += cplx; | |
686 | bits_sum += bits; | |
687 | cplx_tab[i] = cplx; | |
688 | bits_tab[i] = bits; | |
689 | } | |
690 | ||
691 | /* handle qmin/qmax clipping */ | |
692 | if (s->mpv_flags & FF_MPV_FLAG_NAQ) { | |
693 | float factor = bits_sum / cplx_sum; | |
694 | for (i = 0; i < s->mb_num; i++) { | |
695 | float newq = q * cplx_tab[i] / bits_tab[i]; | |
696 | newq *= factor; | |
697 | ||
698 | if (newq > qmax) { | |
699 | bits_sum -= bits_tab[i]; | |
700 | cplx_sum -= cplx_tab[i] * q / qmax; | |
701 | } else if (newq < qmin) { | |
702 | bits_sum -= bits_tab[i]; | |
703 | cplx_sum -= cplx_tab[i] * q / qmin; | |
704 | } | |
705 | } | |
706 | if (bits_sum < 0.001) | |
707 | bits_sum = 0.001; | |
708 | if (cplx_sum < 0.001) | |
709 | cplx_sum = 0.001; | |
710 | } | |
711 | ||
712 | for (i = 0; i < s->mb_num; i++) { | |
713 | const int mb_xy = s->mb_index2xy[i]; | |
714 | float newq = q * cplx_tab[i] / bits_tab[i]; | |
715 | int intq; | |
716 | ||
717 | if (s->mpv_flags & FF_MPV_FLAG_NAQ) { | |
718 | newq *= bits_sum / cplx_sum; | |
719 | } | |
720 | ||
721 | intq = (int)(newq + 0.5); | |
722 | ||
723 | if (intq > qmax) | |
724 | intq = qmax; | |
725 | else if (intq < qmin) | |
726 | intq = qmin; | |
727 | s->lambda_table[mb_xy] = intq; | |
728 | } | |
729 | } | |
730 | ||
731 | void ff_get_2pass_fcode(MpegEncContext *s) | |
732 | { | |
733 | RateControlContext *rcc = &s->rc_context; | |
734 | RateControlEntry *rce = &rcc->entry[s->picture_number]; | |
735 | ||
736 | s->f_code = rce->f_code; | |
737 | s->b_code = rce->b_code; | |
738 | } | |
739 | ||
740 | // FIXME rd or at least approx for dquant | |
741 | ||
742 | float ff_rate_estimate_qscale(MpegEncContext *s, int dry_run) | |
743 | { | |
744 | float q; | |
745 | int qmin, qmax; | |
746 | float br_compensation; | |
747 | double diff; | |
748 | double short_term_q; | |
749 | double fps; | |
750 | int picture_number = s->picture_number; | |
751 | int64_t wanted_bits; | |
752 | RateControlContext *rcc = &s->rc_context; | |
753 | AVCodecContext *a = s->avctx; | |
754 | RateControlEntry local_rce, *rce; | |
755 | double bits; | |
756 | double rate_factor; | |
757 | int64_t var; | |
758 | const int pict_type = s->pict_type; | |
759 | Picture * const pic = &s->current_picture; | |
760 | emms_c(); | |
761 | ||
762 | #if CONFIG_LIBXVID | |
763 | if ((s->flags & CODEC_FLAG_PASS2) && | |
764 | s->avctx->rc_strategy == FF_RC_STRATEGY_XVID) | |
765 | return ff_xvid_rate_estimate_qscale(s, dry_run); | |
766 | #endif | |
767 | ||
768 | get_qminmax(&qmin, &qmax, s, pict_type); | |
769 | ||
770 | fps = get_fps(s->avctx); | |
771 | /* update predictors */ | |
772 | if (picture_number > 2 && !dry_run) { | |
773 | const int64_t last_var = | |
774 | s->last_pict_type == AV_PICTURE_TYPE_I ? rcc->last_mb_var_sum | |
775 | : rcc->last_mc_mb_var_sum; | |
776 | av_assert1(s->frame_bits >= s->stuffing_bits); | |
777 | update_predictor(&rcc->pred[s->last_pict_type], | |
778 | rcc->last_qscale, | |
779 | sqrt(last_var), | |
780 | s->frame_bits - s->stuffing_bits); | |
781 | } | |
782 | ||
783 | if (s->flags & CODEC_FLAG_PASS2) { | |
784 | assert(picture_number >= 0); | |
785 | if (picture_number >= rcc->num_entries) { | |
786 | av_log(s, AV_LOG_ERROR, "Input is longer than 2-pass log file\n"); | |
787 | return -1; | |
788 | } | |
789 | rce = &rcc->entry[picture_number]; | |
790 | wanted_bits = rce->expected_bits; | |
791 | } else { | |
792 | Picture *dts_pic; | |
793 | rce = &local_rce; | |
794 | ||
795 | /* FIXME add a dts field to AVFrame and ensure it is set and use it | |
796 | * here instead of reordering but the reordering is simpler for now | |
797 | * until H.264 B-pyramid must be handled. */ | |
798 | if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay) | |
799 | dts_pic = s->current_picture_ptr; | |
800 | else | |
801 | dts_pic = s->last_picture_ptr; | |
802 | ||
803 | if (!dts_pic || dts_pic->f->pts == AV_NOPTS_VALUE) | |
804 | wanted_bits = (uint64_t)(s->bit_rate * (double)picture_number / fps); | |
805 | else | |
806 | wanted_bits = (uint64_t)(s->bit_rate * (double)dts_pic->f->pts / fps); | |
807 | } | |
808 | ||
809 | diff = s->total_bits - wanted_bits; | |
810 | br_compensation = (a->bit_rate_tolerance - diff) / a->bit_rate_tolerance; | |
811 | if (br_compensation <= 0.0) | |
812 | br_compensation = 0.001; | |
813 | ||
814 | var = pict_type == AV_PICTURE_TYPE_I ? pic->mb_var_sum : pic->mc_mb_var_sum; | |
815 | ||
816 | short_term_q = 0; /* avoid warning */ | |
817 | if (s->flags & CODEC_FLAG_PASS2) { | |
818 | if (pict_type != AV_PICTURE_TYPE_I) | |
819 | assert(pict_type == rce->new_pict_type); | |
820 | ||
821 | q = rce->new_qscale / br_compensation; | |
822 | av_dlog(s, "%f %f %f last:%d var:%"PRId64" type:%d//\n", q, rce->new_qscale, | |
823 | br_compensation, s->frame_bits, var, pict_type); | |
824 | } else { | |
825 | rce->pict_type = | |
826 | rce->new_pict_type = pict_type; | |
827 | rce->mc_mb_var_sum = pic->mc_mb_var_sum; | |
828 | rce->mb_var_sum = pic->mb_var_sum; | |
829 | rce->qscale = FF_QP2LAMBDA * 2; | |
830 | rce->f_code = s->f_code; | |
831 | rce->b_code = s->b_code; | |
832 | rce->misc_bits = 1; | |
833 | ||
834 | bits = predict_size(&rcc->pred[pict_type], rce->qscale, sqrt(var)); | |
835 | if (pict_type == AV_PICTURE_TYPE_I) { | |
836 | rce->i_count = s->mb_num; | |
837 | rce->i_tex_bits = bits; | |
838 | rce->p_tex_bits = 0; | |
839 | rce->mv_bits = 0; | |
840 | } else { | |
841 | rce->i_count = 0; // FIXME we do know this approx | |
842 | rce->i_tex_bits = 0; | |
843 | rce->p_tex_bits = bits * 0.9; | |
844 | rce->mv_bits = bits * 0.1; | |
845 | } | |
846 | rcc->i_cplx_sum[pict_type] += rce->i_tex_bits * rce->qscale; | |
847 | rcc->p_cplx_sum[pict_type] += rce->p_tex_bits * rce->qscale; | |
848 | rcc->mv_bits_sum[pict_type] += rce->mv_bits; | |
849 | rcc->frame_count[pict_type]++; | |
850 | ||
851 | rate_factor = rcc->pass1_wanted_bits / | |
852 | rcc->pass1_rc_eq_output_sum * br_compensation; | |
853 | ||
854 | q = get_qscale(s, rce, rate_factor, picture_number); | |
855 | if (q < 0) | |
856 | return -1; | |
857 | ||
858 | assert(q > 0.0); | |
859 | q = get_diff_limited_q(s, rce, q); | |
860 | assert(q > 0.0); | |
861 | ||
862 | // FIXME type dependent blur like in 2-pass | |
863 | if (pict_type == AV_PICTURE_TYPE_P || s->intra_only) { | |
864 | rcc->short_term_qsum *= a->qblur; | |
865 | rcc->short_term_qcount *= a->qblur; | |
866 | ||
867 | rcc->short_term_qsum += q; | |
868 | rcc->short_term_qcount++; | |
869 | q = short_term_q = rcc->short_term_qsum / rcc->short_term_qcount; | |
870 | } | |
871 | assert(q > 0.0); | |
872 | ||
873 | q = modify_qscale(s, rce, q, picture_number); | |
874 | ||
875 | rcc->pass1_wanted_bits += s->bit_rate / fps; | |
876 | ||
877 | assert(q > 0.0); | |
878 | } | |
879 | ||
880 | if (s->avctx->debug & FF_DEBUG_RC) { | |
881 | av_log(s->avctx, AV_LOG_DEBUG, | |
882 | "%c qp:%d<%2.1f<%d %d want:%d total:%d comp:%f st_q:%2.2f " | |
883 | "size:%d var:%"PRId64"/%"PRId64" br:%d fps:%d\n", | |
884 | av_get_picture_type_char(pict_type), | |
885 | qmin, q, qmax, picture_number, | |
886 | (int)wanted_bits / 1000, (int)s->total_bits / 1000, | |
887 | br_compensation, short_term_q, s->frame_bits, | |
888 | pic->mb_var_sum, pic->mc_mb_var_sum, | |
889 | s->bit_rate / 1000, (int)fps); | |
890 | } | |
891 | ||
892 | if (q < qmin) | |
893 | q = qmin; | |
894 | else if (q > qmax) | |
895 | q = qmax; | |
896 | ||
897 | if (s->adaptive_quant) | |
898 | adaptive_quantization(s, q); | |
899 | else | |
900 | q = (int)(q + 0.5); | |
901 | ||
902 | if (!dry_run) { | |
903 | rcc->last_qscale = q; | |
904 | rcc->last_mc_mb_var_sum = pic->mc_mb_var_sum; | |
905 | rcc->last_mb_var_sum = pic->mb_var_sum; | |
906 | } | |
907 | return q; | |
908 | } | |
909 | ||
910 | // ---------------------------------------------- | |
911 | // 2-Pass code | |
912 | ||
913 | static int init_pass2(MpegEncContext *s) | |
914 | { | |
915 | RateControlContext *rcc = &s->rc_context; | |
916 | AVCodecContext *a = s->avctx; | |
917 | int i, toobig; | |
918 | double fps = get_fps(s->avctx); | |
919 | double complexity[5] = { 0 }; // approximate bits at quant=1 | |
920 | uint64_t const_bits[5] = { 0 }; // quantizer independent bits | |
921 | uint64_t all_const_bits; | |
922 | uint64_t all_available_bits = (uint64_t)(s->bit_rate * | |
923 | (double)rcc->num_entries / fps); | |
924 | double rate_factor = 0; | |
925 | double step; | |
926 | const int filter_size = (int)(a->qblur * 4) | 1; | |
927 | double expected_bits = 0; // init to silence gcc warning | |
928 | double *qscale, *blurred_qscale, qscale_sum; | |
929 | ||
930 | /* find complexity & const_bits & decide the pict_types */ | |
931 | for (i = 0; i < rcc->num_entries; i++) { | |
932 | RateControlEntry *rce = &rcc->entry[i]; | |
933 | ||
934 | rce->new_pict_type = rce->pict_type; | |
935 | rcc->i_cplx_sum[rce->pict_type] += rce->i_tex_bits * rce->qscale; | |
936 | rcc->p_cplx_sum[rce->pict_type] += rce->p_tex_bits * rce->qscale; | |
937 | rcc->mv_bits_sum[rce->pict_type] += rce->mv_bits; | |
938 | rcc->frame_count[rce->pict_type]++; | |
939 | ||
940 | complexity[rce->new_pict_type] += (rce->i_tex_bits + rce->p_tex_bits) * | |
941 | (double)rce->qscale; | |
942 | const_bits[rce->new_pict_type] += rce->mv_bits + rce->misc_bits; | |
943 | } | |
944 | ||
945 | all_const_bits = const_bits[AV_PICTURE_TYPE_I] + | |
946 | const_bits[AV_PICTURE_TYPE_P] + | |
947 | const_bits[AV_PICTURE_TYPE_B]; | |
948 | ||
949 | if (all_available_bits < all_const_bits) { | |
950 | av_log(s->avctx, AV_LOG_ERROR, "requested bitrate is too low\n"); | |
951 | return -1; | |
952 | } | |
953 | ||
954 | qscale = av_malloc_array(rcc->num_entries, sizeof(double)); | |
955 | blurred_qscale = av_malloc_array(rcc->num_entries, sizeof(double)); | |
956 | toobig = 0; | |
957 | ||
958 | for (step = 256 * 256; step > 0.0000001; step *= 0.5) { | |
959 | expected_bits = 0; | |
960 | rate_factor += step; | |
961 | ||
962 | rcc->buffer_index = s->avctx->rc_buffer_size / 2; | |
963 | ||
964 | /* find qscale */ | |
965 | for (i = 0; i < rcc->num_entries; i++) { | |
966 | RateControlEntry *rce = &rcc->entry[i]; | |
967 | ||
968 | qscale[i] = get_qscale(s, &rcc->entry[i], rate_factor, i); | |
969 | rcc->last_qscale_for[rce->pict_type] = qscale[i]; | |
970 | } | |
971 | assert(filter_size % 2 == 1); | |
972 | ||
973 | /* fixed I/B QP relative to P mode */ | |
974 | for (i = FFMAX(0, rcc->num_entries - 300); i < rcc->num_entries; i++) { | |
975 | RateControlEntry *rce = &rcc->entry[i]; | |
976 | ||
977 | qscale[i] = get_diff_limited_q(s, rce, qscale[i]); | |
978 | } | |
979 | ||
980 | for (i = rcc->num_entries - 1; i >= 0; i--) { | |
981 | RateControlEntry *rce = &rcc->entry[i]; | |
982 | ||
983 | qscale[i] = get_diff_limited_q(s, rce, qscale[i]); | |
984 | } | |
985 | ||
986 | /* smooth curve */ | |
987 | for (i = 0; i < rcc->num_entries; i++) { | |
988 | RateControlEntry *rce = &rcc->entry[i]; | |
989 | const int pict_type = rce->new_pict_type; | |
990 | int j; | |
991 | double q = 0.0, sum = 0.0; | |
992 | ||
993 | for (j = 0; j < filter_size; j++) { | |
994 | int index = i + j - filter_size / 2; | |
995 | double d = index - i; | |
996 | double coeff = a->qblur == 0 ? 1.0 : exp(-d * d / (a->qblur * a->qblur)); | |
997 | ||
998 | if (index < 0 || index >= rcc->num_entries) | |
999 | continue; | |
1000 | if (pict_type != rcc->entry[index].new_pict_type) | |
1001 | continue; | |
1002 | q += qscale[index] * coeff; | |
1003 | sum += coeff; | |
1004 | } | |
1005 | blurred_qscale[i] = q / sum; | |
1006 | } | |
1007 | ||
1008 | /* find expected bits */ | |
1009 | for (i = 0; i < rcc->num_entries; i++) { | |
1010 | RateControlEntry *rce = &rcc->entry[i]; | |
1011 | double bits; | |
1012 | ||
1013 | rce->new_qscale = modify_qscale(s, rce, blurred_qscale[i], i); | |
1014 | ||
1015 | bits = qp2bits(rce, rce->new_qscale) + rce->mv_bits + rce->misc_bits; | |
1016 | bits += 8 * ff_vbv_update(s, bits); | |
1017 | ||
1018 | rce->expected_bits = expected_bits; | |
1019 | expected_bits += bits; | |
1020 | } | |
1021 | ||
1022 | av_dlog(s->avctx, | |
1023 | "expected_bits: %f all_available_bits: %d rate_factor: %f\n", | |
1024 | expected_bits, (int)all_available_bits, rate_factor); | |
1025 | if (expected_bits > all_available_bits) { | |
1026 | rate_factor -= step; | |
1027 | ++toobig; | |
1028 | } | |
1029 | } | |
1030 | av_free(qscale); | |
1031 | av_free(blurred_qscale); | |
1032 | ||
1033 | /* check bitrate calculations and print info */ | |
1034 | qscale_sum = 0.0; | |
1035 | for (i = 0; i < rcc->num_entries; i++) { | |
1036 | av_dlog(s, "[lavc rc] entry[%d].new_qscale = %.3f qp = %.3f\n", | |
1037 | i, | |
1038 | rcc->entry[i].new_qscale, | |
1039 | rcc->entry[i].new_qscale / FF_QP2LAMBDA); | |
1040 | qscale_sum += av_clip(rcc->entry[i].new_qscale / FF_QP2LAMBDA, | |
1041 | s->avctx->qmin, s->avctx->qmax); | |
1042 | } | |
1043 | assert(toobig <= 40); | |
1044 | av_log(s->avctx, AV_LOG_DEBUG, | |
1045 | "[lavc rc] requested bitrate: %d bps expected bitrate: %d bps\n", | |
1046 | s->bit_rate, | |
1047 | (int)(expected_bits / ((double)all_available_bits / s->bit_rate))); | |
1048 | av_log(s->avctx, AV_LOG_DEBUG, | |
1049 | "[lavc rc] estimated target average qp: %.3f\n", | |
1050 | (float)qscale_sum / rcc->num_entries); | |
1051 | if (toobig == 0) { | |
1052 | av_log(s->avctx, AV_LOG_INFO, | |
1053 | "[lavc rc] Using all of requested bitrate is not " | |
1054 | "necessary for this video with these parameters.\n"); | |
1055 | } else if (toobig == 40) { | |
1056 | av_log(s->avctx, AV_LOG_ERROR, | |
1057 | "[lavc rc] Error: bitrate too low for this video " | |
1058 | "with these parameters.\n"); | |
1059 | return -1; | |
1060 | } else if (fabs(expected_bits / all_available_bits - 1.0) > 0.01) { | |
1061 | av_log(s->avctx, AV_LOG_ERROR, | |
1062 | "[lavc rc] Error: 2pass curve failed to converge\n"); | |
1063 | return -1; | |
1064 | } | |
1065 | ||
1066 | return 0; | |
1067 | } |