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proresenc_kostya.c
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1 /*
2  * Apple ProRes encoder
3  *
4  * Copyright (c) 2012 Konstantin Shishkov
5  *
6  * This encoder appears to be based on Anatoliy Wassermans considering
7  * similarities in the bugs.
8  *
9  * This file is part of FFmpeg.
10  *
11  * FFmpeg is free software; you can redistribute it and/or
12  * modify it under the terms of the GNU Lesser General Public
13  * License as published by the Free Software Foundation; either
14  * version 2.1 of the License, or (at your option) any later version.
15  *
16  * FFmpeg is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19  * Lesser General Public License for more details.
20  *
21  * You should have received a copy of the GNU Lesser General Public
22  * License along with FFmpeg; if not, write to the Free Software
23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24  */
25 
26 #include "libavutil/opt.h"
27 #include "libavutil/pixdesc.h"
28 #include "avcodec.h"
29 #include "fdctdsp.h"
30 #include "put_bits.h"
31 #include "bytestream.h"
32 #include "internal.h"
33 #include "proresdata.h"
34 
35 #define CFACTOR_Y422 2
36 #define CFACTOR_Y444 3
37 
38 #define MAX_MBS_PER_SLICE 8
39 
40 #define MAX_PLANES 4
41 
42 enum {
43  PRORES_PROFILE_AUTO = -1,
44  PRORES_PROFILE_PROXY = 0,
45  PRORES_PROFILE_LT,
46  PRORES_PROFILE_STANDARD,
47  PRORES_PROFILE_HQ,
48  PRORES_PROFILE_4444,
49 };
50 
51 enum {
52  QUANT_MAT_PROXY = 0,
53  QUANT_MAT_LT,
54  QUANT_MAT_STANDARD,
55  QUANT_MAT_HQ,
56  QUANT_MAT_DEFAULT,
57 };
58 
59 static const uint8_t prores_quant_matrices[][64] = {
60  { // proxy
61  4, 7, 9, 11, 13, 14, 15, 63,
62  7, 7, 11, 12, 14, 15, 63, 63,
63  9, 11, 13, 14, 15, 63, 63, 63,
64  11, 11, 13, 14, 63, 63, 63, 63,
65  11, 13, 14, 63, 63, 63, 63, 63,
66  13, 14, 63, 63, 63, 63, 63, 63,
67  13, 63, 63, 63, 63, 63, 63, 63,
68  63, 63, 63, 63, 63, 63, 63, 63,
69  },
70  { // LT
71  4, 5, 6, 7, 9, 11, 13, 15,
72  5, 5, 7, 8, 11, 13, 15, 17,
73  6, 7, 9, 11, 13, 15, 15, 17,
74  7, 7, 9, 11, 13, 15, 17, 19,
75  7, 9, 11, 13, 14, 16, 19, 23,
76  9, 11, 13, 14, 16, 19, 23, 29,
77  9, 11, 13, 15, 17, 21, 28, 35,
78  11, 13, 16, 17, 21, 28, 35, 41,
79  },
80  { // standard
81  4, 4, 5, 5, 6, 7, 7, 9,
82  4, 4, 5, 6, 7, 7, 9, 9,
83  5, 5, 6, 7, 7, 9, 9, 10,
84  5, 5, 6, 7, 7, 9, 9, 10,
85  5, 6, 7, 7, 8, 9, 10, 12,
86  6, 7, 7, 8, 9, 10, 12, 15,
87  6, 7, 7, 9, 10, 11, 14, 17,
88  7, 7, 9, 10, 11, 14, 17, 21,
89  },
90  { // high quality
91  4, 4, 4, 4, 4, 4, 4, 4,
92  4, 4, 4, 4, 4, 4, 4, 4,
93  4, 4, 4, 4, 4, 4, 4, 4,
94  4, 4, 4, 4, 4, 4, 4, 5,
95  4, 4, 4, 4, 4, 4, 5, 5,
96  4, 4, 4, 4, 4, 5, 5, 6,
97  4, 4, 4, 4, 5, 5, 6, 7,
98  4, 4, 4, 4, 5, 6, 7, 7,
99  },
100  { // codec default
101  4, 4, 4, 4, 4, 4, 4, 4,
102  4, 4, 4, 4, 4, 4, 4, 4,
103  4, 4, 4, 4, 4, 4, 4, 4,
104  4, 4, 4, 4, 4, 4, 4, 4,
105  4, 4, 4, 4, 4, 4, 4, 4,
106  4, 4, 4, 4, 4, 4, 4, 4,
107  4, 4, 4, 4, 4, 4, 4, 4,
108  4, 4, 4, 4, 4, 4, 4, 4,
109  },
110 };
111 
112 #define NUM_MB_LIMITS 4
113 static const int prores_mb_limits[NUM_MB_LIMITS] = {
114  1620, // up to 720x576
115  2700, // up to 960x720
116  6075, // up to 1440x1080
117  9216, // up to 2048x1152
118 };
119 
120 static const struct prores_profile {
121  const char *full_name;
122  uint32_t tag;
123  int min_quant;
124  int max_quant;
125  int br_tab[NUM_MB_LIMITS];
126  int quant;
127 } prores_profile_info[5] = {
128  {
129  .full_name = "proxy",
130  .tag = MKTAG('a', 'p', 'c', 'o'),
131  .min_quant = 4,
132  .max_quant = 8,
133  .br_tab = { 300, 242, 220, 194 },
134  .quant = QUANT_MAT_PROXY,
135  },
136  {
137  .full_name = "LT",
138  .tag = MKTAG('a', 'p', 'c', 's'),
139  .min_quant = 1,
140  .max_quant = 9,
141  .br_tab = { 720, 560, 490, 440 },
142  .quant = QUANT_MAT_LT,
143  },
144  {
145  .full_name = "standard",
146  .tag = MKTAG('a', 'p', 'c', 'n'),
147  .min_quant = 1,
148  .max_quant = 6,
149  .br_tab = { 1050, 808, 710, 632 },
150  .quant = QUANT_MAT_STANDARD,
151  },
152  {
153  .full_name = "high quality",
154  .tag = MKTAG('a', 'p', 'c', 'h'),
155  .min_quant = 1,
156  .max_quant = 6,
157  .br_tab = { 1566, 1216, 1070, 950 },
158  .quant = QUANT_MAT_HQ,
159  },
160  {
161  .full_name = "4444",
162  .tag = MKTAG('a', 'p', '4', 'h'),
163  .min_quant = 1,
164  .max_quant = 6,
165  .br_tab = { 2350, 1828, 1600, 1425 },
166  .quant = QUANT_MAT_HQ,
167  }
168 };
169 
170 #define TRELLIS_WIDTH 16
171 #define SCORE_LIMIT INT_MAX / 2
172 
173 struct TrellisNode {
174  int prev_node;
175  int quant;
176  int bits;
177  int score;
178 };
179 
180 #define MAX_STORED_Q 16
181 
182 typedef struct ProresThreadData {
183  DECLARE_ALIGNED(16, int16_t, blocks)[MAX_PLANES][64 * 4 * MAX_MBS_PER_SLICE];
184  DECLARE_ALIGNED(16, uint16_t, emu_buf)[16 * 16];
185  int16_t custom_q[64];
186  struct TrellisNode *nodes;
187 } ProresThreadData;
188 
189 typedef struct ProresContext {
190  AVClass *class;
191  DECLARE_ALIGNED(16, int16_t, blocks)[MAX_PLANES][64 * 4 * MAX_MBS_PER_SLICE];
192  DECLARE_ALIGNED(16, uint16_t, emu_buf)[16*16];
193  int16_t quants[MAX_STORED_Q][64];
194  int16_t custom_q[64];
195  const uint8_t *quant_mat;
196  const uint8_t *scantable;
197 
198  void (*fdct)(FDCTDSPContext *fdsp, const uint16_t *src,
199  int linesize, int16_t *block);
200  FDCTDSPContext fdsp;
201 
202  int mb_width, mb_height;
203  int mbs_per_slice;
204  int num_chroma_blocks, chroma_factor;
205  int slices_width;
206  int slices_per_picture;
207  int pictures_per_frame; // 1 for progressive, 2 for interlaced
208  int cur_picture_idx;
209  int num_planes;
210  int bits_per_mb;
211  int force_quant;
212  int alpha_bits;
213  int warn;
214 
215  char *vendor;
216  int quant_sel;
217 
218  int frame_size_upper_bound;
219 
220  int profile;
221  const struct prores_profile *profile_info;
222 
223  int *slice_q;
224 
225  ProresThreadData *tdata;
226 } ProresContext;
227 
228 static void get_slice_data(ProresContext *ctx, const uint16_t *src,
229  int linesize, int x, int y, int w, int h,
230  int16_t *blocks, uint16_t *emu_buf,
231  int mbs_per_slice, int blocks_per_mb, int is_chroma)
232 {
233  const uint16_t *esrc;
234  const int mb_width = 4 * blocks_per_mb;
235  int elinesize;
236  int i, j, k;
237 
238  for (i = 0; i < mbs_per_slice; i++, src += mb_width) {
239  if (x >= w) {
240  memset(blocks, 0, 64 * (mbs_per_slice - i) * blocks_per_mb
241  * sizeof(*blocks));
242  return;
243  }
244  if (x + mb_width <= w && y + 16 <= h) {
245  esrc = src;
246  elinesize = linesize;
247  } else {
248  int bw, bh, pix;
249 
250  esrc = emu_buf;
251  elinesize = 16 * sizeof(*emu_buf);
252 
253  bw = FFMIN(w - x, mb_width);
254  bh = FFMIN(h - y, 16);
255 
256  for (j = 0; j < bh; j++) {
257  memcpy(emu_buf + j * 16,
258  (const uint8_t*)src + j * linesize,
259  bw * sizeof(*src));
260  pix = emu_buf[j * 16 + bw - 1];
261  for (k = bw; k < mb_width; k++)
262  emu_buf[j * 16 + k] = pix;
263  }
264  for (; j < 16; j++)
265  memcpy(emu_buf + j * 16,
266  emu_buf + (bh - 1) * 16,
267  mb_width * sizeof(*emu_buf));
268  }
269  if (!is_chroma) {
270  ctx->fdct(&ctx->fdsp, esrc, elinesize, blocks);
271  blocks += 64;
272  if (blocks_per_mb > 2) {
273  ctx->fdct(&ctx->fdsp, esrc + 8, elinesize, blocks);
274  blocks += 64;
275  }
276  ctx->fdct(&ctx->fdsp, esrc + elinesize * 4, elinesize, blocks);
277  blocks += 64;
278  if (blocks_per_mb > 2) {
279  ctx->fdct(&ctx->fdsp, esrc + elinesize * 4 + 8, elinesize, blocks);
280  blocks += 64;
281  }
282  } else {
283  ctx->fdct(&ctx->fdsp, esrc, elinesize, blocks);
284  blocks += 64;
285  ctx->fdct(&ctx->fdsp, esrc + elinesize * 4, elinesize, blocks);
286  blocks += 64;
287  if (blocks_per_mb > 2) {
288  ctx->fdct(&ctx->fdsp, esrc + 8, elinesize, blocks);
289  blocks += 64;
290  ctx->fdct(&ctx->fdsp, esrc + elinesize * 4 + 8, elinesize, blocks);
291  blocks += 64;
292  }
293  }
294 
295  x += mb_width;
296  }
297 }
298 
299 static void get_alpha_data(ProresContext *ctx, const uint16_t *src,
300  int linesize, int x, int y, int w, int h,
301  int16_t *blocks, int mbs_per_slice, int abits)
302 {
303  const int slice_width = 16 * mbs_per_slice;
304  int i, j, copy_w, copy_h;
305 
306  copy_w = FFMIN(w - x, slice_width);
307  copy_h = FFMIN(h - y, 16);
308  for (i = 0; i < copy_h; i++) {
309  memcpy(blocks, src, copy_w * sizeof(*src));
310  if (abits == 8)
311  for (j = 0; j < copy_w; j++)
312  blocks[j] >>= 2;
313  else
314  for (j = 0; j < copy_w; j++)
315  blocks[j] = (blocks[j] << 6) | (blocks[j] >> 4);
316  for (j = copy_w; j < slice_width; j++)
317  blocks[j] = blocks[copy_w - 1];
318  blocks += slice_width;
319  src += linesize >> 1;
320  }
321  for (; i < 16; i++) {
322  memcpy(blocks, blocks - slice_width, slice_width * sizeof(*blocks));
323  blocks += slice_width;
324  }
325 }
326 
327 /**
328  * Write an unsigned rice/exp golomb codeword.
329  */
330 static inline void encode_vlc_codeword(PutBitContext *pb, unsigned codebook, int val)
331 {
332  unsigned int rice_order, exp_order, switch_bits, switch_val;
333  int exponent;
334 
335  /* number of prefix bits to switch between Rice and expGolomb */
336  switch_bits = (codebook & 3) + 1;
337  rice_order = codebook >> 5; /* rice code order */
338  exp_order = (codebook >> 2) & 7; /* exp golomb code order */
339 
340  switch_val = switch_bits << rice_order;
341 
342  if (val >= switch_val) {
343  val -= switch_val - (1 << exp_order);
344  exponent = av_log2(val);
345 
346  put_bits(pb, exponent - exp_order + switch_bits, 0);
347  put_bits(pb, exponent + 1, val);
348  } else {
349  exponent = val >> rice_order;
350 
351  if (exponent)
352  put_bits(pb, exponent, 0);
353  put_bits(pb, 1, 1);
354  if (rice_order)
355  put_sbits(pb, rice_order, val);
356  }
357 }
358 
359 #define GET_SIGN(x) ((x) >> 31)
360 #define MAKE_CODE(x) (((x) << 1) ^ GET_SIGN(x))
361 
362 static void encode_dcs(PutBitContext *pb, int16_t *blocks,
363  int blocks_per_slice, int scale)
364 {
365  int i;
366  int codebook = 3, code, dc, prev_dc, delta, sign, new_sign;
367 
368  prev_dc = (blocks[0] - 0x4000) / scale;
369  encode_vlc_codeword(pb, FIRST_DC_CB, MAKE_CODE(prev_dc));
370  sign = 0;
371  codebook = 3;
372  blocks += 64;
373 
374  for (i = 1; i < blocks_per_slice; i++, blocks += 64) {
375  dc = (blocks[0] - 0x4000) / scale;
376  delta = dc - prev_dc;
377  new_sign = GET_SIGN(delta);
378  delta = (delta ^ sign) - sign;
379  code = MAKE_CODE(delta);
380  encode_vlc_codeword(pb, ff_prores_dc_codebook[codebook], code);
381  codebook = (code + (code & 1)) >> 1;
382  codebook = FFMIN(codebook, 3);
383  sign = new_sign;
384  prev_dc = dc;
385  }
386 }
387 
388 static void encode_acs(PutBitContext *pb, int16_t *blocks,
389  int blocks_per_slice,
390  int plane_size_factor,
391  const uint8_t *scan, const int16_t *qmat)
392 {
393  int idx, i;
394  int run, level, run_cb, lev_cb;
395  int max_coeffs, abs_level;
396 
397  max_coeffs = blocks_per_slice << 6;
398  run_cb = ff_prores_run_to_cb_index[4];
399  lev_cb = ff_prores_lev_to_cb_index[2];
400  run = 0;
401 
402  for (i = 1; i < 64; i++) {
403  for (idx = scan[i]; idx < max_coeffs; idx += 64) {
404  level = blocks[idx] / qmat[scan[i]];
405  if (level) {
406  abs_level = FFABS(level);
407  encode_vlc_codeword(pb, ff_prores_ac_codebook[run_cb], run);
408  encode_vlc_codeword(pb, ff_prores_ac_codebook[lev_cb],
409  abs_level - 1);
410  put_sbits(pb, 1, GET_SIGN(level));
411 
412  run_cb = ff_prores_run_to_cb_index[FFMIN(run, 15)];
413  lev_cb = ff_prores_lev_to_cb_index[FFMIN(abs_level, 9)];
414  run = 0;
415  } else {
416  run++;
417  }
418  }
419  }
420 }
421 
422 static int encode_slice_plane(ProresContext *ctx, PutBitContext *pb,
423  const uint16_t *src, int linesize,
424  int mbs_per_slice, int16_t *blocks,
425  int blocks_per_mb, int plane_size_factor,
426  const int16_t *qmat)
427 {
428  int blocks_per_slice, saved_pos;
429 
430  saved_pos = put_bits_count(pb);
431  blocks_per_slice = mbs_per_slice * blocks_per_mb;
432 
433  encode_dcs(pb, blocks, blocks_per_slice, qmat[0]);
434  encode_acs(pb, blocks, blocks_per_slice, plane_size_factor,
435  ctx->scantable, qmat);
436  flush_put_bits(pb);
437 
438  return (put_bits_count(pb) - saved_pos) >> 3;
439 }
440 
441 static void put_alpha_diff(PutBitContext *pb, int cur, int prev, int abits)
442 {
443  const int mask = (1 << abits) - 1;
444  const int dbits = (abits == 8) ? 4 : 7;
445  const int dsize = 1 << dbits - 1;
446  int diff = cur - prev;
447 
448  diff &= mask;
449  if (diff >= (1 << abits) - dsize)
450  diff -= 1 << abits;
451  if (diff < -dsize || diff > dsize || !diff) {
452  put_bits(pb, 1, 1);
453  put_bits(pb, abits, diff);
454  } else {
455  put_bits(pb, 1, 0);
456  put_bits(pb, dbits - 1, FFABS(diff) - 1);
457  put_bits(pb, 1, diff < 0);
458  }
459 }
460 
461 static void put_alpha_run(PutBitContext *pb, int run)
462 {
463  if (run) {
464  put_bits(pb, 1, 0);
465  if (run < 0x10)
466  put_bits(pb, 4, run);
467  else
468  put_bits(pb, 15, run);
469  } else {
470  put_bits(pb, 1, 1);
471  }
472 }
473 
474 // todo alpha quantisation for high quants
475 static int encode_alpha_plane(ProresContext *ctx, PutBitContext *pb,
476  int mbs_per_slice, uint16_t *blocks,
477  int quant)
478 {
479  const int abits = ctx->alpha_bits;
480  const int mask = (1 << abits) - 1;
481  const int num_coeffs = mbs_per_slice * 256;
482  int saved_pos = put_bits_count(pb);
483  int prev = mask, cur;
484  int idx = 0;
485  int run = 0;
486 
487  cur = blocks[idx++];
488  put_alpha_diff(pb, cur, prev, abits);
489  prev = cur;
490  do {
491  cur = blocks[idx++];
492  if (cur != prev) {
493  put_alpha_run (pb, run);
494  put_alpha_diff(pb, cur, prev, abits);
495  prev = cur;
496  run = 0;
497  } else {
498  run++;
499  }
500  } while (idx < num_coeffs);
501  if (run)
502  put_alpha_run(pb, run);
503  flush_put_bits(pb);
504  return (put_bits_count(pb) - saved_pos) >> 3;
505 }
506 
507 static int encode_slice(AVCodecContext *avctx, const AVFrame *pic,
508  PutBitContext *pb,
509  int sizes[4], int x, int y, int quant,
510  int mbs_per_slice)
511 {
512  ProresContext *ctx = avctx->priv_data;
513  int i, xp, yp;
514  int total_size = 0;
515  const uint16_t *src;
516  int slice_width_factor = av_log2(mbs_per_slice);
517  int num_cblocks, pwidth, linesize, line_add;
518  int plane_factor, is_chroma;
519  uint16_t *qmat;
520 
521  if (ctx->pictures_per_frame == 1)
522  line_add = 0;
523  else
524  line_add = ctx->cur_picture_idx ^ !pic->top_field_first;
525 
526  if (ctx->force_quant) {
527  qmat = ctx->quants[0];
528  } else if (quant < MAX_STORED_Q) {
529  qmat = ctx->quants[quant];
530  } else {
531  qmat = ctx->custom_q;
532  for (i = 0; i < 64; i++)
533  qmat[i] = ctx->quant_mat[i] * quant;
534  }
535 
536  for (i = 0; i < ctx->num_planes; i++) {
537  is_chroma = (i == 1 || i == 2);
538  plane_factor = slice_width_factor + 2;
539  if (is_chroma)
540  plane_factor += ctx->chroma_factor - 3;
541  if (!is_chroma || ctx->chroma_factor == CFACTOR_Y444) {
542  xp = x << 4;
543  yp = y << 4;
544  num_cblocks = 4;
545  pwidth = avctx->width;
546  } else {
547  xp = x << 3;
548  yp = y << 4;
549  num_cblocks = 2;
550  pwidth = avctx->width >> 1;
551  }
552 
553  linesize = pic->linesize[i] * ctx->pictures_per_frame;
554  src = (const uint16_t*)(pic->data[i] + yp * linesize +
555  line_add * pic->linesize[i]) + xp;
556 
557  if (i < 3) {
558  get_slice_data(ctx, src, linesize, xp, yp,
559  pwidth, avctx->height / ctx->pictures_per_frame,
560  ctx->blocks[0], ctx->emu_buf,
561  mbs_per_slice, num_cblocks, is_chroma);
562  sizes[i] = encode_slice_plane(ctx, pb, src, linesize,
563  mbs_per_slice, ctx->blocks[0],
564  num_cblocks, plane_factor,
565  qmat);
566  } else {
567  get_alpha_data(ctx, src, linesize, xp, yp,
568  pwidth, avctx->height / ctx->pictures_per_frame,
569  ctx->blocks[0], mbs_per_slice, ctx->alpha_bits);
570  sizes[i] = encode_alpha_plane(ctx, pb, mbs_per_slice,
571  ctx->blocks[0], quant);
572  }
573  total_size += sizes[i];
574  if (put_bits_left(pb) < 0) {
575  av_log(avctx, AV_LOG_ERROR,
576  "Underestimated required buffer size.\n");
577  return AVERROR_BUG;
578  }
579  }
580  return total_size;
581 }
582 
583 static inline int estimate_vlc(unsigned codebook, int val)
584 {
585  unsigned int rice_order, exp_order, switch_bits, switch_val;
586  int exponent;
587 
588  /* number of prefix bits to switch between Rice and expGolomb */
589  switch_bits = (codebook & 3) + 1;
590  rice_order = codebook >> 5; /* rice code order */
591  exp_order = (codebook >> 2) & 7; /* exp golomb code order */
592 
593  switch_val = switch_bits << rice_order;
594 
595  if (val >= switch_val) {
596  val -= switch_val - (1 << exp_order);
597  exponent = av_log2(val);
598 
599  return exponent * 2 - exp_order + switch_bits + 1;
600  } else {
601  return (val >> rice_order) + rice_order + 1;
602  }
603 }
604 
605 static int estimate_dcs(int *error, int16_t *blocks, int blocks_per_slice,
606  int scale)
607 {
608  int i;
609  int codebook = 3, code, dc, prev_dc, delta, sign, new_sign;
610  int bits;
611 
612  prev_dc = (blocks[0] - 0x4000) / scale;
613  bits = estimate_vlc(FIRST_DC_CB, MAKE_CODE(prev_dc));
614  sign = 0;
615  codebook = 3;
616  blocks += 64;
617  *error += FFABS(blocks[0] - 0x4000) % scale;
618 
619  for (i = 1; i < blocks_per_slice; i++, blocks += 64) {
620  dc = (blocks[0] - 0x4000) / scale;
621  *error += FFABS(blocks[0] - 0x4000) % scale;
622  delta = dc - prev_dc;
623  new_sign = GET_SIGN(delta);
624  delta = (delta ^ sign) - sign;
625  code = MAKE_CODE(delta);
626  bits += estimate_vlc(ff_prores_dc_codebook[codebook], code);
627  codebook = (code + (code & 1)) >> 1;
628  codebook = FFMIN(codebook, 3);
629  sign = new_sign;
630  prev_dc = dc;
631  }
632 
633  return bits;
634 }
635 
636 static int estimate_acs(int *error, int16_t *blocks, int blocks_per_slice,
637  int plane_size_factor,
638  const uint8_t *scan, const int16_t *qmat)
639 {
640  int idx, i;
641  int run, level, run_cb, lev_cb;
642  int max_coeffs, abs_level;
643  int bits = 0;
644 
645  max_coeffs = blocks_per_slice << 6;
646  run_cb = ff_prores_run_to_cb_index[4];
647  lev_cb = ff_prores_lev_to_cb_index[2];
648  run = 0;
649 
650  for (i = 1; i < 64; i++) {
651  for (idx = scan[i]; idx < max_coeffs; idx += 64) {
652  level = blocks[idx] / qmat[scan[i]];
653  *error += FFABS(blocks[idx]) % qmat[scan[i]];
654  if (level) {
655  abs_level = FFABS(level);
656  bits += estimate_vlc(ff_prores_ac_codebook[run_cb], run);
657  bits += estimate_vlc(ff_prores_ac_codebook[lev_cb],
658  abs_level - 1) + 1;
659 
660  run_cb = ff_prores_run_to_cb_index[FFMIN(run, 15)];
661  lev_cb = ff_prores_lev_to_cb_index[FFMIN(abs_level, 9)];
662  run = 0;
663  } else {
664  run++;
665  }
666  }
667  }
668 
669  return bits;
670 }
671 
672 static int estimate_slice_plane(ProresContext *ctx, int *error, int plane,
673  const uint16_t *src, int linesize,
674  int mbs_per_slice,
675  int blocks_per_mb, int plane_size_factor,
676  const int16_t *qmat, ProresThreadData *td)
677 {
678  int blocks_per_slice;
679  int bits;
680 
681  blocks_per_slice = mbs_per_slice * blocks_per_mb;
682 
683  bits = estimate_dcs(error, td->blocks[plane], blocks_per_slice, qmat[0]);
684  bits += estimate_acs(error, td->blocks[plane], blocks_per_slice,
685  plane_size_factor, ctx->scantable, qmat);
686 
687  return FFALIGN(bits, 8);
688 }
689 
690 static int est_alpha_diff(int cur, int prev, int abits)
691 {
692  const int mask = (1 << abits) - 1;
693  const int dbits = (abits == 8) ? 4 : 7;
694  const int dsize = 1 << dbits - 1;
695  int diff = cur - prev;
696 
697  diff &= mask;
698  if (diff >= (1 << abits) - dsize)
699  diff -= 1 << abits;
700  if (diff < -dsize || diff > dsize || !diff)
701  return abits + 1;
702  else
703  return dbits + 1;
704 }
705 
706 static int estimate_alpha_plane(ProresContext *ctx, int *error,
707  const uint16_t *src, int linesize,
708  int mbs_per_slice, int quant,
709  int16_t *blocks)
710 {
711  const int abits = ctx->alpha_bits;
712  const int mask = (1 << abits) - 1;
713  const int num_coeffs = mbs_per_slice * 256;
714  int prev = mask, cur;
715  int idx = 0;
716  int run = 0;
717  int bits;
718 
719  *error = 0;
720  cur = blocks[idx++];
721  bits = est_alpha_diff(cur, prev, abits);
722  prev = cur;
723  do {
724  cur = blocks[idx++];
725  if (cur != prev) {
726  if (!run)
727  bits++;
728  else if (run < 0x10)
729  bits += 4;
730  else
731  bits += 15;
732  bits += est_alpha_diff(cur, prev, abits);
733  prev = cur;
734  run = 0;
735  } else {
736  run++;
737  }
738  } while (idx < num_coeffs);
739 
740  if (run) {
741  if (run < 0x10)
742  bits += 4;
743  else
744  bits += 15;
745  }
746 
747  return bits;
748 }
749 
750 static int find_slice_quant(AVCodecContext *avctx, const AVFrame *pic,
751  int trellis_node, int x, int y, int mbs_per_slice,
752  ProresThreadData *td)
753 {
754  ProresContext *ctx = avctx->priv_data;
755  int i, q, pq, xp, yp;
756  const uint16_t *src;
757  int slice_width_factor = av_log2(mbs_per_slice);
758  int num_cblocks[MAX_PLANES], pwidth;
759  int plane_factor[MAX_PLANES], is_chroma[MAX_PLANES];
760  const int min_quant = ctx->profile_info->min_quant;
761  const int max_quant = ctx->profile_info->max_quant;
762  int error, bits, bits_limit;
763  int mbs, prev, cur, new_score;
764  int slice_bits[TRELLIS_WIDTH], slice_score[TRELLIS_WIDTH];
765  int overquant;
766  uint16_t *qmat;
767  int linesize[4], line_add;
768 
769  if (ctx->pictures_per_frame == 1)
770  line_add = 0;
771  else
772  line_add = ctx->cur_picture_idx ^ !pic->top_field_first;
773  mbs = x + mbs_per_slice;
774 
775  for (i = 0; i < ctx->num_planes; i++) {
776  is_chroma[i] = (i == 1 || i == 2);
777  plane_factor[i] = slice_width_factor + 2;
778  if (is_chroma[i])
779  plane_factor[i] += ctx->chroma_factor - 3;
780  if (!is_chroma[i] || ctx->chroma_factor == CFACTOR_Y444) {
781  xp = x << 4;
782  yp = y << 4;
783  num_cblocks[i] = 4;
784  pwidth = avctx->width;
785  } else {
786  xp = x << 3;
787  yp = y << 4;
788  num_cblocks[i] = 2;
789  pwidth = avctx->width >> 1;
790  }
791 
792  linesize[i] = pic->linesize[i] * ctx->pictures_per_frame;
793  src = (const uint16_t*)(pic->data[i] + yp * linesize[i] +
794  line_add * pic->linesize[i]) + xp;
795 
796  if (i < 3) {
797  get_slice_data(ctx, src, linesize[i], xp, yp,
798  pwidth, avctx->height / ctx->pictures_per_frame,
799  td->blocks[i], td->emu_buf,
800  mbs_per_slice, num_cblocks[i], is_chroma[i]);
801  } else {
802  get_alpha_data(ctx, src, linesize[i], xp, yp,
803  pwidth, avctx->height / ctx->pictures_per_frame,
804  td->blocks[i], mbs_per_slice, ctx->alpha_bits);
805  }
806  }
807 
808  for (q = min_quant; q < max_quant + 2; q++) {
809  td->nodes[trellis_node + q].prev_node = -1;
810  td->nodes[trellis_node + q].quant = q;
811  }
812 
813  // todo: maybe perform coarser quantising to fit into frame size when needed
814  for (q = min_quant; q <= max_quant; q++) {
815  bits = 0;
816  error = 0;
817  for (i = 0; i < ctx->num_planes - !!ctx->alpha_bits; i++) {
818  bits += estimate_slice_plane(ctx, &error, i,
819  src, linesize[i],
820  mbs_per_slice,
821  num_cblocks[i], plane_factor[i],
822  ctx->quants[q], td);
823  }
824  if (ctx->alpha_bits)
825  bits += estimate_alpha_plane(ctx, &error, src, linesize[3],
826  mbs_per_slice, q, td->blocks[3]);
827  if (bits > 65000 * 8)
828  error = SCORE_LIMIT;
829 
830  slice_bits[q] = bits;
831  slice_score[q] = error;
832  }
833  if (slice_bits[max_quant] <= ctx->bits_per_mb * mbs_per_slice) {
834  slice_bits[max_quant + 1] = slice_bits[max_quant];
835  slice_score[max_quant + 1] = slice_score[max_quant] + 1;
836  overquant = max_quant;
837  } else {
838  for (q = max_quant + 1; q < 128; q++) {
839  bits = 0;
840  error = 0;
841  if (q < MAX_STORED_Q) {
842  qmat = ctx->quants[q];
843  } else {
844  qmat = td->custom_q;
845  for (i = 0; i < 64; i++)
846  qmat[i] = ctx->quant_mat[i] * q;
847  }
848  for (i = 0; i < ctx->num_planes - !!ctx->alpha_bits; i++) {
849  bits += estimate_slice_plane(ctx, &error, i,
850  src, linesize[i],
851  mbs_per_slice,
852  num_cblocks[i], plane_factor[i],
853  qmat, td);
854  }
855  if (ctx->alpha_bits)
856  bits += estimate_alpha_plane(ctx, &error, src, linesize[3],
857  mbs_per_slice, q, td->blocks[3]);
858  if (bits <= ctx->bits_per_mb * mbs_per_slice)
859  break;
860  }
861 
862  slice_bits[max_quant + 1] = bits;
863  slice_score[max_quant + 1] = error;
864  overquant = q;
865  }
866  td->nodes[trellis_node + max_quant + 1].quant = overquant;
867 
868  bits_limit = mbs * ctx->bits_per_mb;
869  for (pq = min_quant; pq < max_quant + 2; pq++) {
870  prev = trellis_node - TRELLIS_WIDTH + pq;
871 
872  for (q = min_quant; q < max_quant + 2; q++) {
873  cur = trellis_node + q;
874 
875  bits = td->nodes[prev].bits + slice_bits[q];
876  error = slice_score[q];
877  if (bits > bits_limit)
878  error = SCORE_LIMIT;
879 
880  if (td->nodes[prev].score < SCORE_LIMIT && error < SCORE_LIMIT)
881  new_score = td->nodes[prev].score + error;
882  else
883  new_score = SCORE_LIMIT;
884  if (td->nodes[cur].prev_node == -1 ||
885  td->nodes[cur].score >= new_score) {
886 
887  td->nodes[cur].bits = bits;
888  td->nodes[cur].score = new_score;
889  td->nodes[cur].prev_node = prev;
890  }
891  }
892  }
893 
894  error = td->nodes[trellis_node + min_quant].score;
895  pq = trellis_node + min_quant;
896  for (q = min_quant + 1; q < max_quant + 2; q++) {
897  if (td->nodes[trellis_node + q].score <= error) {
898  error = td->nodes[trellis_node + q].score;
899  pq = trellis_node + q;
900  }
901  }
902 
903  return pq;
904 }
905 
906 static int find_quant_thread(AVCodecContext *avctx, void *arg,
907  int jobnr, int threadnr)
908 {
909  ProresContext *ctx = avctx->priv_data;
910  ProresThreadData *td = ctx->tdata + threadnr;
911  int mbs_per_slice = ctx->mbs_per_slice;
912  int x, y = jobnr, mb, q = 0;
913 
914  for (x = mb = 0; x < ctx->mb_width; x += mbs_per_slice, mb++) {
915  while (ctx->mb_width - x < mbs_per_slice)
916  mbs_per_slice >>= 1;
917  q = find_slice_quant(avctx, arg,
918  (mb + 1) * TRELLIS_WIDTH, x, y,
919  mbs_per_slice, td);
920  }
921 
922  for (x = ctx->slices_width - 1; x >= 0; x--) {
923  ctx->slice_q[x + y * ctx->slices_width] = td->nodes[q].quant;
924  q = td->nodes[q].prev_node;
925  }
926 
927  return 0;
928 }
929 
930 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
931  const AVFrame *pic, int *got_packet)
932 {
933  ProresContext *ctx = avctx->priv_data;
934  uint8_t *orig_buf, *buf, *slice_hdr, *slice_sizes, *tmp;
935  uint8_t *picture_size_pos;
936  PutBitContext pb;
937  int x, y, i, mb, q = 0;
938  int sizes[4] = { 0 };
939  int slice_hdr_size = 2 + 2 * (ctx->num_planes - 1);
940  int frame_size, picture_size, slice_size;
941  int pkt_size, ret;
942  int max_slice_size = (ctx->frame_size_upper_bound - 200) / (ctx->pictures_per_frame * ctx->slices_per_picture + 1);
943  uint8_t frame_flags;
944 
945  pkt_size = ctx->frame_size_upper_bound;
946 
947  if ((ret = ff_alloc_packet2(avctx, pkt, pkt_size + FF_MIN_BUFFER_SIZE)) < 0)
948  return ret;
949 
950  orig_buf = pkt->data;
951 
952  // frame atom
953  orig_buf += 4; // frame size
954  bytestream_put_be32 (&orig_buf, FRAME_ID); // frame container ID
955  buf = orig_buf;
956 
957  // frame header
958  tmp = buf;
959  buf += 2; // frame header size will be stored here
960  bytestream_put_be16 (&buf, 0); // version 1
961  bytestream_put_buffer(&buf, ctx->vendor, 4);
962  bytestream_put_be16 (&buf, avctx->width);
963  bytestream_put_be16 (&buf, avctx->height);
964 
965  frame_flags = ctx->chroma_factor << 6;
966  if (avctx->flags & CODEC_FLAG_INTERLACED_DCT)
967  frame_flags |= pic->top_field_first ? 0x04 : 0x08;
968  bytestream_put_byte (&buf, frame_flags);
969 
970  bytestream_put_byte (&buf, 0); // reserved
971  bytestream_put_byte (&buf, avctx->color_primaries);
972  bytestream_put_byte (&buf, avctx->color_trc);
973  bytestream_put_byte (&buf, avctx->colorspace);
974  bytestream_put_byte (&buf, 0x40 | (ctx->alpha_bits >> 3));
975  bytestream_put_byte (&buf, 0); // reserved
976  if (ctx->quant_sel != QUANT_MAT_DEFAULT) {
977  bytestream_put_byte (&buf, 0x03); // matrix flags - both matrices are present
978  // luma quantisation matrix
979  for (i = 0; i < 64; i++)
980  bytestream_put_byte(&buf, ctx->quant_mat[i]);
981  // chroma quantisation matrix
982  for (i = 0; i < 64; i++)
983  bytestream_put_byte(&buf, ctx->quant_mat[i]);
984  } else {
985  bytestream_put_byte (&buf, 0x00); // matrix flags - default matrices are used
986  }
987  bytestream_put_be16 (&tmp, buf - orig_buf); // write back frame header size
988 
989  for (ctx->cur_picture_idx = 0;
990  ctx->cur_picture_idx < ctx->pictures_per_frame;
991  ctx->cur_picture_idx++) {
992  // picture header
993  picture_size_pos = buf + 1;
994  bytestream_put_byte (&buf, 0x40); // picture header size (in bits)
995  buf += 4; // picture data size will be stored here
996  bytestream_put_be16 (&buf, ctx->slices_per_picture);
997  bytestream_put_byte (&buf, av_log2(ctx->mbs_per_slice) << 4); // slice width and height in MBs
998 
999  // seek table - will be filled during slice encoding
1000  slice_sizes = buf;
1001  buf += ctx->slices_per_picture * 2;
1002 
1003  // slices
1004  if (!ctx->force_quant) {
1005  ret = avctx->execute2(avctx, find_quant_thread, (void*)pic, NULL,
1006  ctx->mb_height);
1007  if (ret)
1008  return ret;
1009  }
1010 
1011  for (y = 0; y < ctx->mb_height; y++) {
1012  int mbs_per_slice = ctx->mbs_per_slice;
1013  for (x = mb = 0; x < ctx->mb_width; x += mbs_per_slice, mb++) {
1014  q = ctx->force_quant ? ctx->force_quant
1015  : ctx->slice_q[mb + y * ctx->slices_width];
1016 
1017  while (ctx->mb_width - x < mbs_per_slice)
1018  mbs_per_slice >>= 1;
1019 
1020  bytestream_put_byte(&buf, slice_hdr_size << 3);
1021  slice_hdr = buf;
1022  buf += slice_hdr_size - 1;
1023  if (pkt_size <= buf - orig_buf + 2 * max_slice_size) {
1024  uint8_t *start = pkt->data;
1025  // Recompute new size according to max_slice_size
1026  // and deduce delta
1027  int delta = 200 + (ctx->pictures_per_frame *
1028  ctx->slices_per_picture + 1) *
1029  max_slice_size - pkt_size;
1030 
1031  delta = FFMAX(delta, 2 * max_slice_size);
1032  ctx->frame_size_upper_bound += delta;
1033 
1034  if (!ctx->warn) {
1035  avpriv_request_sample(avctx,
1036  "Packet too small: is %i,"
1037  " needs %i (slice: %i). "
1038  "Correct allocation",
1039  pkt_size, delta, max_slice_size);
1040  ctx->warn = 1;
1041  }
1042 
1043  ret = av_grow_packet(pkt, delta);
1044  if (ret < 0)
1045  return ret;
1046 
1047  pkt_size += delta;
1048  // restore pointers
1049  orig_buf = pkt->data + (orig_buf - start);
1050  buf = pkt->data + (buf - start);
1051  picture_size_pos = pkt->data + (picture_size_pos - start);
1052  slice_sizes = pkt->data + (slice_sizes - start);
1053  slice_hdr = pkt->data + (slice_hdr - start);
1054  tmp = pkt->data + (tmp - start);
1055  }
1056  init_put_bits(&pb, buf, (pkt_size - (buf - orig_buf)));
1057  ret = encode_slice(avctx, pic, &pb, sizes, x, y, q,
1058  mbs_per_slice);
1059  if (ret < 0)
1060  return ret;
1061 
1062  bytestream_put_byte(&slice_hdr, q);
1063  slice_size = slice_hdr_size + sizes[ctx->num_planes - 1];
1064  for (i = 0; i < ctx->num_planes - 1; i++) {
1065  bytestream_put_be16(&slice_hdr, sizes[i]);
1066  slice_size += sizes[i];
1067  }
1068  bytestream_put_be16(&slice_sizes, slice_size);
1069  buf += slice_size - slice_hdr_size;
1070  if (max_slice_size < slice_size)
1071  max_slice_size = slice_size;
1072  }
1073  }
1074 
1075  picture_size = buf - (picture_size_pos - 1);
1076  bytestream_put_be32(&picture_size_pos, picture_size);
1077  }
1078 
1079  orig_buf -= 8;
1080  frame_size = buf - orig_buf;
1081  bytestream_put_be32(&orig_buf, frame_size);
1082 
1083  pkt->size = frame_size;
1084  pkt->flags |= AV_PKT_FLAG_KEY;
1085  *got_packet = 1;
1086 
1087  return 0;
1088 }
1089 
1090 static av_cold int encode_close(AVCodecContext *avctx)
1091 {
1092  ProresContext *ctx = avctx->priv_data;
1093  int i;
1094 
1095  av_frame_free(&avctx->coded_frame);
1096 
1097  if (ctx->tdata) {
1098  for (i = 0; i < avctx->thread_count; i++)
1099  av_freep(&ctx->tdata[i].nodes);
1100  }
1101  av_freep(&ctx->tdata);
1102  av_freep(&ctx->slice_q);
1103 
1104  return 0;
1105 }
1106 
1107 static void prores_fdct(FDCTDSPContext *fdsp, const uint16_t *src,
1108  int linesize, int16_t *block)
1109 {
1110  int x, y;
1111  const uint16_t *tsrc = src;
1112 
1113  for (y = 0; y < 8; y++) {
1114  for (x = 0; x < 8; x++)
1115  block[y * 8 + x] = tsrc[x];
1116  tsrc += linesize >> 1;
1117  }
1118  fdsp->fdct(block);
1119 }
1120 
1121 static av_cold int encode_init(AVCodecContext *avctx)
1122 {
1123  ProresContext *ctx = avctx->priv_data;
1124  int mps;
1125  int i, j;
1126  int min_quant, max_quant;
1127  int interlaced = !!(avctx->flags & CODEC_FLAG_INTERLACED_DCT);
1128 
1129  avctx->bits_per_raw_sample = 10;
1130  avctx->coded_frame = av_frame_alloc();
1131  if (!avctx->coded_frame)
1132  return AVERROR(ENOMEM);
1133  avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
1134  avctx->coded_frame->key_frame = 1;
1135 
1136  ctx->fdct = prores_fdct;
1137  ctx->scantable = interlaced ? ff_prores_interlaced_scan
1138  : ff_prores_progressive_scan;
1139  ff_fdctdsp_init(&ctx->fdsp, avctx);
1140 
1141  mps = ctx->mbs_per_slice;
1142  if (mps & (mps - 1)) {
1143  av_log(avctx, AV_LOG_ERROR,
1144  "there should be an integer power of two MBs per slice\n");
1145  return AVERROR(EINVAL);
1146  }
1147  if (ctx->profile == PRORES_PROFILE_AUTO) {
1148  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(avctx->pix_fmt);
1149  ctx->profile = (desc->flags & AV_PIX_FMT_FLAG_ALPHA ||
1150  !(desc->log2_chroma_w + desc->log2_chroma_h))
1151  ? PRORES_PROFILE_4444 : PRORES_PROFILE_HQ;
1152  av_log(avctx, AV_LOG_INFO, "Autoselected %s. It can be overridden "
1153  "through -profile option.\n", ctx->profile == PRORES_PROFILE_4444
1154  ? "4:4:4:4 profile because of the used input colorspace"
1155  : "HQ profile to keep best quality");
1156  }
1157  if (av_pix_fmt_desc_get(avctx->pix_fmt)->flags & AV_PIX_FMT_FLAG_ALPHA) {
1158  if (ctx->profile != PRORES_PROFILE_4444) {
1159  // force alpha and warn
1160  av_log(avctx, AV_LOG_WARNING, "Profile selected will not "
1161  "encode alpha. Override with -profile if needed.\n");
1162  ctx->alpha_bits = 0;
1163  }
1164  if (ctx->alpha_bits & 7) {
1165  av_log(avctx, AV_LOG_ERROR, "alpha bits should be 0, 8 or 16\n");
1166  return AVERROR(EINVAL);
1167  }
1168  } else {
1169  ctx->alpha_bits = 0;
1170  }
1171 
1172  ctx->chroma_factor = avctx->pix_fmt == AV_PIX_FMT_YUV422P10
1173  ? CFACTOR_Y422
1174  : CFACTOR_Y444;
1175  ctx->profile_info = prores_profile_info + ctx->profile;
1176  ctx->num_planes = 3 + !!ctx->alpha_bits;
1177 
1178  ctx->mb_width = FFALIGN(avctx->width, 16) >> 4;
1179 
1180  if (interlaced)
1181  ctx->mb_height = FFALIGN(avctx->height, 32) >> 5;
1182  else
1183  ctx->mb_height = FFALIGN(avctx->height, 16) >> 4;
1184 
1185  ctx->slices_width = ctx->mb_width / mps;
1186  ctx->slices_width += av_popcount(ctx->mb_width - ctx->slices_width * mps);
1187  ctx->slices_per_picture = ctx->mb_height * ctx->slices_width;
1188  ctx->pictures_per_frame = 1 + interlaced;
1189 
1190  if (ctx->quant_sel == -1)
1191  ctx->quant_mat = prores_quant_matrices[ctx->profile_info->quant];
1192  else
1193  ctx->quant_mat = prores_quant_matrices[ctx->quant_sel];
1194 
1195  if (strlen(ctx->vendor) != 4) {
1196  av_log(avctx, AV_LOG_ERROR, "vendor ID should be 4 bytes\n");
1197  return AVERROR_INVALIDDATA;
1198  }
1199 
1200  ctx->force_quant = avctx->global_quality / FF_QP2LAMBDA;
1201  if (!ctx->force_quant) {
1202  if (!ctx->bits_per_mb) {
1203  for (i = 0; i < NUM_MB_LIMITS - 1; i++)
1204  if (prores_mb_limits[i] >= ctx->mb_width * ctx->mb_height *
1205  ctx->pictures_per_frame)
1206  break;
1207  ctx->bits_per_mb = ctx->profile_info->br_tab[i];
1208  } else if (ctx->bits_per_mb < 128) {
1209  av_log(avctx, AV_LOG_ERROR, "too few bits per MB, please set at least 128\n");
1210  return AVERROR_INVALIDDATA;
1211  }
1212 
1213  min_quant = ctx->profile_info->min_quant;
1214  max_quant = ctx->profile_info->max_quant;
1215  for (i = min_quant; i < MAX_STORED_Q; i++) {
1216  for (j = 0; j < 64; j++)
1217  ctx->quants[i][j] = ctx->quant_mat[j] * i;
1218  }
1219 
1220  ctx->slice_q = av_malloc(ctx->slices_per_picture * sizeof(*ctx->slice_q));
1221  if (!ctx->slice_q) {
1222  encode_close(avctx);
1223  return AVERROR(ENOMEM);
1224  }
1225 
1226  ctx->tdata = av_mallocz(avctx->thread_count * sizeof(*ctx->tdata));
1227  if (!ctx->tdata) {
1228  encode_close(avctx);
1229  return AVERROR(ENOMEM);
1230  }
1231 
1232  for (j = 0; j < avctx->thread_count; j++) {
1233  ctx->tdata[j].nodes = av_malloc((ctx->slices_width + 1)
1234  * TRELLIS_WIDTH
1235  * sizeof(*ctx->tdata->nodes));
1236  if (!ctx->tdata[j].nodes) {
1237  encode_close(avctx);
1238  return AVERROR(ENOMEM);
1239  }
1240  for (i = min_quant; i < max_quant + 2; i++) {
1241  ctx->tdata[j].nodes[i].prev_node = -1;
1242  ctx->tdata[j].nodes[i].bits = 0;
1243  ctx->tdata[j].nodes[i].score = 0;
1244  }
1245  }
1246  } else {
1247  int ls = 0;
1248 
1249  if (ctx->force_quant > 64) {
1250  av_log(avctx, AV_LOG_ERROR, "too large quantiser, maximum is 64\n");
1251  return AVERROR_INVALIDDATA;
1252  }
1253 
1254  for (j = 0; j < 64; j++) {
1255  ctx->quants[0][j] = ctx->quant_mat[j] * ctx->force_quant;
1256  ls += av_log2((1 << 11) / ctx->quants[0][j]) * 2 + 1;
1257  }
1258 
1259  ctx->bits_per_mb = ls * 8;
1260  if (ctx->chroma_factor == CFACTOR_Y444)
1261  ctx->bits_per_mb += ls * 4;
1262  }
1263 
1264  ctx->frame_size_upper_bound = (ctx->pictures_per_frame *
1265  ctx->slices_per_picture + 1) *
1266  (2 + 2 * ctx->num_planes +
1267  (mps * ctx->bits_per_mb) / 8)
1268  + 200;
1269 
1270  if (ctx->alpha_bits) {
1271  // The alpha plane is run-coded and might exceed the bit budget.
1272  ctx->frame_size_upper_bound += (ctx->pictures_per_frame *
1273  ctx->slices_per_picture + 1) *
1274  /* num pixels per slice */ (ctx->mbs_per_slice * 256 *
1275  /* bits per pixel */ (1 + ctx->alpha_bits + 1) + 7 >> 3);
1276  }
1277 
1278  avctx->codec_tag = ctx->profile_info->tag;
1279 
1280  av_log(avctx, AV_LOG_DEBUG,
1281  "profile %d, %d slices, interlacing: %s, %d bits per MB\n",
1282  ctx->profile, ctx->slices_per_picture * ctx->pictures_per_frame,
1283  interlaced ? "yes" : "no", ctx->bits_per_mb);
1284  av_log(avctx, AV_LOG_DEBUG, "frame size upper bound: %d\n",
1285  ctx->frame_size_upper_bound);
1286 
1287  return 0;
1288 }
1289 
1290 #define OFFSET(x) offsetof(ProresContext, x)
1291 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
1292 
1293 static const AVOption options[] = {
1294  { "mbs_per_slice", "macroblocks per slice", OFFSET(mbs_per_slice),
1295  AV_OPT_TYPE_INT, { .i64 = 8 }, 1, MAX_MBS_PER_SLICE, VE },
1296  { "profile", NULL, OFFSET(profile), AV_OPT_TYPE_INT,
1297  { .i64 = PRORES_PROFILE_AUTO },
1298  PRORES_PROFILE_AUTO, PRORES_PROFILE_4444, VE, "profile" },
1299  { "auto", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = PRORES_PROFILE_AUTO },
1300  0, 0, VE, "profile" },
1301  { "proxy", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = PRORES_PROFILE_PROXY },
1302  0, 0, VE, "profile" },
1303  { "lt", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = PRORES_PROFILE_LT },
1304  0, 0, VE, "profile" },
1305  { "standard", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = PRORES_PROFILE_STANDARD },
1306  0, 0, VE, "profile" },
1307  { "hq", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = PRORES_PROFILE_HQ },
1308  0, 0, VE, "profile" },
1309  { "4444", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = PRORES_PROFILE_4444 },
1310  0, 0, VE, "profile" },
1311  { "vendor", "vendor ID", OFFSET(vendor),
1312  AV_OPT_TYPE_STRING, { .str = "Lavc" }, CHAR_MIN, CHAR_MAX, VE },
1313  { "bits_per_mb", "desired bits per macroblock", OFFSET(bits_per_mb),
1314  AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 8192, VE },
1315  { "quant_mat", "quantiser matrix", OFFSET(quant_sel), AV_OPT_TYPE_INT,
1316  { .i64 = -1 }, -1, QUANT_MAT_DEFAULT, VE, "quant_mat" },
1317  { "auto", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = -1 },
1318  0, 0, VE, "quant_mat" },
1319  { "proxy", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = QUANT_MAT_PROXY },
1320  0, 0, VE, "quant_mat" },
1321  { "lt", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = QUANT_MAT_LT },
1322  0, 0, VE, "quant_mat" },
1323  { "standard", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = QUANT_MAT_STANDARD },
1324  0, 0, VE, "quant_mat" },
1325  { "hq", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = QUANT_MAT_HQ },
1326  0, 0, VE, "quant_mat" },
1327  { "default", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = QUANT_MAT_DEFAULT },
1328  0, 0, VE, "quant_mat" },
1329  { "alpha_bits", "bits for alpha plane", OFFSET(alpha_bits), AV_OPT_TYPE_INT,
1330  { .i64 = 16 }, 0, 16, VE },
1331  { NULL }
1332 };
1333 
1334 static const AVClass proresenc_class = {
1335  .class_name = "ProRes encoder",
1336  .item_name = av_default_item_name,
1337  .option = options,
1338  .version = LIBAVUTIL_VERSION_INT,
1339 };
1340 
1341 AVCodec ff_prores_ks_encoder = {
1342  .name = "prores_ks",
1343  .long_name = NULL_IF_CONFIG_SMALL("Apple ProRes (iCodec Pro)"),
1344  .type = AVMEDIA_TYPE_VIDEO,
1345  .id = AV_CODEC_ID_PRORES,
1346  .priv_data_size = sizeof(ProresContext),
1347  .init = encode_init,
1348  .close = encode_close,
1349  .encode2 = encode_frame,
1350  .capabilities = CODEC_CAP_SLICE_THREADS,
1351  .pix_fmts = (const enum AVPixelFormat[]) {
1352  AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
1353  AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_NONE
1354  },
1355  .priv_class = &proresenc_class,
1356 };
Generated on Wed Mar 4 2015 19:21:19 for FFmpeg by   doxygen 1.8.2