Libav
huffyuvenc.c
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1 /*
2  * Copyright (c) 2002-2003 Michael Niedermayer <michaelni@gmx.at>
3  *
4  * see http://www.pcisys.net/~melanson/codecs/huffyuv.txt for a description of
5  * the algorithm used
6  *
7  * This file is part of Libav.
8  *
9  * Libav is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * Libav is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with Libav; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
29 #include "avcodec.h"
30 #include "huffyuv.h"
31 #include "huffman.h"
32 #include "put_bits.h"
33 
34 static inline int sub_left_prediction(HYuvContext *s, uint8_t *dst,
35  uint8_t *src, int w, int left)
36 {
37  int i;
38  if (w < 32) {
39  for (i = 0; i < w; i++) {
40  const int temp = src[i];
41  dst[i] = temp - left;
42  left = temp;
43  }
44  return left;
45  } else {
46  for (i = 0; i < 16; i++) {
47  const int temp = src[i];
48  dst[i] = temp - left;
49  left = temp;
50  }
51  s->dsp.diff_bytes(dst + 16, src + 16, src + 15, w - 16);
52  return src[w-1];
53  }
54 }
55 
56 static inline void sub_left_prediction_bgr32(HYuvContext *s, uint8_t *dst,
57  uint8_t *src, int w,
58  int *red, int *green, int *blue,
59  int *alpha)
60 {
61  int i;
62  int r, g, b, a;
63  r = *red;
64  g = *green;
65  b = *blue;
66  a = *alpha;
67 
68  for (i = 0; i < FFMIN(w, 4); i++) {
69  const int rt = src[i * 4 + R];
70  const int gt = src[i * 4 + G];
71  const int bt = src[i * 4 + B];
72  const int at = src[i * 4 + A];
73  dst[i * 4 + R] = rt - r;
74  dst[i * 4 + G] = gt - g;
75  dst[i * 4 + B] = bt - b;
76  dst[i * 4 + A] = at - a;
77  r = rt;
78  g = gt;
79  b = bt;
80  a = at;
81  }
82 
83  s->dsp.diff_bytes(dst + 16, src + 16, src + 12, w * 4 - 16);
84 
85  *red = src[(w - 1) * 4 + R];
86  *green = src[(w - 1) * 4 + G];
87  *blue = src[(w - 1) * 4 + B];
88  *alpha = src[(w - 1) * 4 + A];
89 }
90 
91 static inline void sub_left_prediction_rgb24(HYuvContext *s, uint8_t *dst,
92  uint8_t *src, int w,
93  int *red, int *green, int *blue)
94 {
95  int i;
96  int r, g, b;
97  r = *red;
98  g = *green;
99  b = *blue;
100  for (i = 0; i < FFMIN(w, 16); i++) {
101  const int rt = src[i * 3 + 0];
102  const int gt = src[i * 3 + 1];
103  const int bt = src[i * 3 + 2];
104  dst[i * 3 + 0] = rt - r;
105  dst[i * 3 + 1] = gt - g;
106  dst[i * 3 + 2] = bt - b;
107  r = rt;
108  g = gt;
109  b = bt;
110  }
111 
112  s->dsp.diff_bytes(dst + 48, src + 48, src + 48 - 3, w * 3 - 48);
113 
114  *red = src[(w - 1) * 3 + 0];
115  *green = src[(w - 1) * 3 + 1];
116  *blue = src[(w - 1) * 3 + 2];
117 }
118 
119 static int store_table(HYuvContext *s, const uint8_t *len, uint8_t *buf)
120 {
121  int i;
122  int index = 0;
123 
124  for (i = 0; i < 256;) {
125  int val = len[i];
126  int repeat = 0;
127 
128  for (; i < 256 && len[i] == val && repeat < 255; i++)
129  repeat++;
130 
131  assert(val < 32 && val >0 && repeat<256 && repeat>0);
132  if ( repeat > 7) {
133  buf[index++] = val;
134  buf[index++] = repeat;
135  } else {
136  buf[index++] = val | (repeat << 5);
137  }
138  }
139 
140  return index;
141 }
142 
144 {
145  HYuvContext *s = avctx->priv_data;
146  int i, j;
147 
148  ff_huffyuv_common_init(avctx);
149 
150  avctx->extradata = av_mallocz(1024*30); // 256*3+4 == 772
151  avctx->stats_out = av_mallocz(1024*30); // 21*256*3(%llu ) + 3(\n) + 1(0) = 16132
152  s->version = 2;
153 
154  avctx->coded_frame = av_frame_alloc();
155  if (!avctx->coded_frame)
156  return AVERROR(ENOMEM);
157 
159  avctx->coded_frame->key_frame = 1;
160 
161  switch (avctx->pix_fmt) {
162  case AV_PIX_FMT_YUV420P:
163  case AV_PIX_FMT_YUV422P:
164  if (s->width & 1) {
165  av_log(avctx, AV_LOG_ERROR, "Width must be even for this colorspace.\n");
166  return -1;
167  }
168  s->bitstream_bpp = avctx->pix_fmt == AV_PIX_FMT_YUV420P ? 12 : 16;
169  break;
170  case AV_PIX_FMT_RGB32:
171  s->bitstream_bpp = 32;
172  break;
173  case AV_PIX_FMT_RGB24:
174  s->bitstream_bpp = 24;
175  break;
176  default:
177  av_log(avctx, AV_LOG_ERROR, "format not supported\n");
178  return -1;
179  }
181  s->decorrelate = s->bitstream_bpp >= 24;
182  s->predictor = avctx->prediction_method;
183  s->interlaced = avctx->flags&CODEC_FLAG_INTERLACED_ME ? 1 : 0;
184  if (avctx->context_model == 1) {
185  s->context = avctx->context_model;
187  av_log(avctx, AV_LOG_ERROR,
188  "context=1 is not compatible with "
189  "2 pass huffyuv encoding\n");
190  return -1;
191  }
192  }else s->context= 0;
193 
194  if (avctx->codec->id == AV_CODEC_ID_HUFFYUV) {
195  if (avctx->pix_fmt == AV_PIX_FMT_YUV420P) {
196  av_log(avctx, AV_LOG_ERROR,
197  "Error: YV12 is not supported by huffyuv; use "
198  "vcodec=ffvhuff or format=422p\n");
199  return -1;
200  }
201  if (avctx->context_model) {
202  av_log(avctx, AV_LOG_ERROR,
203  "Error: per-frame huffman tables are not supported "
204  "by huffyuv; use vcodec=ffvhuff\n");
205  return -1;
206  }
207  if (s->interlaced != ( s->height > 288 ))
208  av_log(avctx, AV_LOG_INFO,
209  "using huffyuv 2.2.0 or newer interlacing flag\n");
210  }
211 
212  if (s->bitstream_bpp >= 24 && s->predictor == MEDIAN) {
213  av_log(avctx, AV_LOG_ERROR,
214  "Error: RGB is incompatible with median predictor\n");
215  return -1;
216  }
217 
218  ((uint8_t*)avctx->extradata)[0] = s->predictor | (s->decorrelate << 6);
219  ((uint8_t*)avctx->extradata)[1] = s->bitstream_bpp;
220  ((uint8_t*)avctx->extradata)[2] = s->interlaced ? 0x10 : 0x20;
221  if (s->context)
222  ((uint8_t*)avctx->extradata)[2] |= 0x40;
223  ((uint8_t*)avctx->extradata)[3] = 0;
224  s->avctx->extradata_size = 4;
225 
226  if (avctx->stats_in) {
227  char *p = avctx->stats_in;
228 
229  for (i = 0; i < 3; i++)
230  for (j = 0; j < 256; j++)
231  s->stats[i][j] = 1;
232 
233  for (;;) {
234  for (i = 0; i < 3; i++) {
235  char *next;
236 
237  for (j = 0; j < 256; j++) {
238  s->stats[i][j] += strtol(p, &next, 0);
239  if (next == p) return -1;
240  p = next;
241  }
242  }
243  if (p[0] == 0 || p[1] == 0 || p[2] == 0) break;
244  }
245  } else {
246  for (i = 0; i < 3; i++)
247  for (j = 0; j < 256; j++) {
248  int d = FFMIN(j, 256 - j);
249 
250  s->stats[i][j] = 100000000 / (d + 1);
251  }
252  }
253 
254  for (i = 0; i < 3; i++) {
255  ff_huff_gen_len_table(s->len[i], s->stats[i]);
256 
257  if (ff_huffyuv_generate_bits_table(s->bits[i], s->len[i]) < 0) {
258  return -1;
259  }
260 
261  s->avctx->extradata_size +=
262  store_table(s, s->len[i], &((uint8_t*)s->avctx->extradata)[s->avctx->extradata_size]);
263  }
264 
265  if (s->context) {
266  for (i = 0; i < 3; i++) {
267  int pels = s->width * s->height / (i ? 40 : 10);
268  for (j = 0; j < 256; j++) {
269  int d = FFMIN(j, 256 - j);
270  s->stats[i][j] = pels/(d + 1);
271  }
272  }
273  } else {
274  for (i = 0; i < 3; i++)
275  for (j = 0; j < 256; j++)
276  s->stats[i][j]= 0;
277  }
278 
280 
281  s->picture_number=0;
282 
283  return 0;
284 }
285 static int encode_422_bitstream(HYuvContext *s, int offset, int count)
286 {
287  int i;
288  const uint8_t *y = s->temp[0] + offset;
289  const uint8_t *u = s->temp[1] + offset / 2;
290  const uint8_t *v = s->temp[2] + offset / 2;
291 
292  if (s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb) >> 3) < 2 * 4 * count) {
293  av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
294  return -1;
295  }
296 
297 #define LOAD4\
298  int y0 = y[2 * i];\
299  int y1 = y[2 * i + 1];\
300  int u0 = u[i];\
301  int v0 = v[i];
302 
303  count /= 2;
304 
305  if (s->flags & CODEC_FLAG_PASS1) {
306  for(i = 0; i < count; i++) {
307  LOAD4;
308  s->stats[0][y0]++;
309  s->stats[1][u0]++;
310  s->stats[0][y1]++;
311  s->stats[2][v0]++;
312  }
313  }
315  return 0;
316  if (s->context) {
317  for (i = 0; i < count; i++) {
318  LOAD4;
319  s->stats[0][y0]++;
320  put_bits(&s->pb, s->len[0][y0], s->bits[0][y0]);
321  s->stats[1][u0]++;
322  put_bits(&s->pb, s->len[1][u0], s->bits[1][u0]);
323  s->stats[0][y1]++;
324  put_bits(&s->pb, s->len[0][y1], s->bits[0][y1]);
325  s->stats[2][v0]++;
326  put_bits(&s->pb, s->len[2][v0], s->bits[2][v0]);
327  }
328  } else {
329  for(i = 0; i < count; i++) {
330  LOAD4;
331  put_bits(&s->pb, s->len[0][y0], s->bits[0][y0]);
332  put_bits(&s->pb, s->len[1][u0], s->bits[1][u0]);
333  put_bits(&s->pb, s->len[0][y1], s->bits[0][y1]);
334  put_bits(&s->pb, s->len[2][v0], s->bits[2][v0]);
335  }
336  }
337  return 0;
338 }
339 
340 static int encode_gray_bitstream(HYuvContext *s, int count)
341 {
342  int i;
343 
344  if (s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb) >> 3) < 4 * count) {
345  av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
346  return -1;
347  }
348 
349 #define LOAD2\
350  int y0 = s->temp[0][2 * i];\
351  int y1 = s->temp[0][2 * i + 1];
352 #define STAT2\
353  s->stats[0][y0]++;\
354  s->stats[0][y1]++;
355 #define WRITE2\
356  put_bits(&s->pb, s->len[0][y0], s->bits[0][y0]);\
357  put_bits(&s->pb, s->len[0][y1], s->bits[0][y1]);
358 
359  count /= 2;
360 
361  if (s->flags & CODEC_FLAG_PASS1) {
362  for (i = 0; i < count; i++) {
363  LOAD2;
364  STAT2;
365  }
366  }
368  return 0;
369 
370  if (s->context) {
371  for (i = 0; i < count; i++) {
372  LOAD2;
373  STAT2;
374  WRITE2;
375  }
376  } else {
377  for (i = 0; i < count; i++) {
378  LOAD2;
379  WRITE2;
380  }
381  }
382  return 0;
383 }
384 
385 static inline int encode_bgra_bitstream(HYuvContext *s, int count, int planes)
386 {
387  int i;
388 
389  if (s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb) >> 3) <
390  4 * planes * count) {
391  av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n");
392  return -1;
393  }
394 
395 #define LOAD_GBRA \
396  int g = s->temp[0][planes == 3 ? 3 * i + 1 : 4 * i + G]; \
397  int b = s->temp[0][planes == 3 ? 3 * i + 2 : 4 * i + B] - g & 0xFF; \
398  int r = s->temp[0][planes == 3 ? 3 * i + 0 : 4 * i + R] - g & 0xFF; \
399  int a = s->temp[0][planes * i + A];
400 
401 #define STAT_BGRA \
402  s->stats[0][b]++; \
403  s->stats[1][g]++; \
404  s->stats[2][r]++; \
405  if (planes == 4) \
406  s->stats[2][a]++;
407 
408 #define WRITE_GBRA \
409  put_bits(&s->pb, s->len[1][g], s->bits[1][g]); \
410  put_bits(&s->pb, s->len[0][b], s->bits[0][b]); \
411  put_bits(&s->pb, s->len[2][r], s->bits[2][r]); \
412  if (planes == 4) \
413  put_bits(&s->pb, s->len[2][a], s->bits[2][a]);
414 
415  if ((s->flags & CODEC_FLAG_PASS1) &&
417  for (i = 0; i < count; i++) {
418  LOAD_GBRA;
419  STAT_BGRA;
420  }
421  } else if (s->context || (s->flags & CODEC_FLAG_PASS1)) {
422  for (i = 0; i < count; i++) {
423  LOAD_GBRA;
424  STAT_BGRA;
425  WRITE_GBRA;
426  }
427  } else {
428  for (i = 0; i < count; i++) {
429  LOAD_GBRA;
430  WRITE_GBRA;
431  }
432  }
433  return 0;
434 }
435 
436 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
437  const AVFrame *pict, int *got_packet)
438 {
439  HYuvContext *s = avctx->priv_data;
440  const int width = s->width;
441  const int width2 = s->width>>1;
442  const int height = s->height;
443  const int fake_ystride = s->interlaced ? pict->linesize[0]*2 : pict->linesize[0];
444  const int fake_ustride = s->interlaced ? pict->linesize[1]*2 : pict->linesize[1];
445  const int fake_vstride = s->interlaced ? pict->linesize[2]*2 : pict->linesize[2];
446  const AVFrame * const p = pict;
447  int i, j, size = 0, ret;
448 
449  if (!pkt->data &&
450  (ret = av_new_packet(pkt, width * height * 3 * 4 + FF_MIN_BUFFER_SIZE)) < 0) {
451  av_log(avctx, AV_LOG_ERROR, "Error allocating output packet.\n");
452  return ret;
453  }
454 
455  if (s->context) {
456  for (i = 0; i < 3; i++) {
457  ff_huff_gen_len_table(s->len[i], s->stats[i]);
458  if (ff_huffyuv_generate_bits_table(s->bits[i], s->len[i]) < 0)
459  return -1;
460  size += store_table(s, s->len[i], &pkt->data[size]);
461  }
462 
463  for (i = 0; i < 3; i++)
464  for (j = 0; j < 256; j++)
465  s->stats[i][j] >>= 1;
466  }
467 
468  init_put_bits(&s->pb, pkt->data + size, pkt->size - size);
469 
470  if (avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
471  avctx->pix_fmt == AV_PIX_FMT_YUV420P) {
472  int lefty, leftu, leftv, y, cy;
473 
474  put_bits(&s->pb, 8, leftv = p->data[2][0]);
475  put_bits(&s->pb, 8, lefty = p->data[0][1]);
476  put_bits(&s->pb, 8, leftu = p->data[1][0]);
477  put_bits(&s->pb, 8, p->data[0][0]);
478 
479  lefty = sub_left_prediction(s, s->temp[0], p->data[0], width , 0);
480  leftu = sub_left_prediction(s, s->temp[1], p->data[1], width2, 0);
481  leftv = sub_left_prediction(s, s->temp[2], p->data[2], width2, 0);
482 
483  encode_422_bitstream(s, 2, width-2);
484 
485  if (s->predictor==MEDIAN) {
486  int lefttopy, lefttopu, lefttopv;
487  cy = y = 1;
488  if (s->interlaced) {
489  lefty = sub_left_prediction(s, s->temp[0], p->data[0] + p->linesize[0], width , lefty);
490  leftu = sub_left_prediction(s, s->temp[1], p->data[1] + p->linesize[1], width2, leftu);
491  leftv = sub_left_prediction(s, s->temp[2], p->data[2] + p->linesize[2], width2, leftv);
492 
493  encode_422_bitstream(s, 0, width);
494  y++; cy++;
495  }
496 
497  lefty = sub_left_prediction(s, s->temp[0], p->data[0] + fake_ystride, 4, lefty);
498  leftu = sub_left_prediction(s, s->temp[1], p->data[1] + fake_ustride, 2, leftu);
499  leftv = sub_left_prediction(s, s->temp[2], p->data[2] + fake_vstride, 2, leftv);
500 
501  encode_422_bitstream(s, 0, 4);
502 
503  lefttopy = p->data[0][3];
504  lefttopu = p->data[1][1];
505  lefttopv = p->data[2][1];
506  s->dsp.sub_hfyu_median_prediction(s->temp[0], p->data[0]+4, p->data[0] + fake_ystride + 4, width - 4 , &lefty, &lefttopy);
507  s->dsp.sub_hfyu_median_prediction(s->temp[1], p->data[1]+2, p->data[1] + fake_ustride + 2, width2 - 2, &leftu, &lefttopu);
508  s->dsp.sub_hfyu_median_prediction(s->temp[2], p->data[2]+2, p->data[2] + fake_vstride + 2, width2 - 2, &leftv, &lefttopv);
509  encode_422_bitstream(s, 0, width - 4);
510  y++; cy++;
511 
512  for (; y < height; y++,cy++) {
513  uint8_t *ydst, *udst, *vdst;
514 
515  if (s->bitstream_bpp == 12) {
516  while (2 * cy > y) {
517  ydst = p->data[0] + p->linesize[0] * y;
518  s->dsp.sub_hfyu_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);
519  encode_gray_bitstream(s, width);
520  y++;
521  }
522  if (y >= height) break;
523  }
524  ydst = p->data[0] + p->linesize[0] * y;
525  udst = p->data[1] + p->linesize[1] * cy;
526  vdst = p->data[2] + p->linesize[2] * cy;
527 
528  s->dsp.sub_hfyu_median_prediction(s->temp[0], ydst - fake_ystride, ydst, width , &lefty, &lefttopy);
529  s->dsp.sub_hfyu_median_prediction(s->temp[1], udst - fake_ustride, udst, width2, &leftu, &lefttopu);
530  s->dsp.sub_hfyu_median_prediction(s->temp[2], vdst - fake_vstride, vdst, width2, &leftv, &lefttopv);
531 
532  encode_422_bitstream(s, 0, width);
533  }
534  } else {
535  for (cy = y = 1; y < height; y++, cy++) {
536  uint8_t *ydst, *udst, *vdst;
537 
538  /* encode a luma only line & y++ */
539  if (s->bitstream_bpp == 12) {
540  ydst = p->data[0] + p->linesize[0] * y;
541 
542  if (s->predictor == PLANE && s->interlaced < y) {
543  s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);
544 
545  lefty = sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);
546  } else {
547  lefty = sub_left_prediction(s, s->temp[0], ydst, width , lefty);
548  }
549  encode_gray_bitstream(s, width);
550  y++;
551  if (y >= height) break;
552  }
553 
554  ydst = p->data[0] + p->linesize[0] * y;
555  udst = p->data[1] + p->linesize[1] * cy;
556  vdst = p->data[2] + p->linesize[2] * cy;
557 
558  if (s->predictor == PLANE && s->interlaced < cy) {
559  s->dsp.diff_bytes(s->temp[1], ydst, ydst - fake_ystride, width);
560  s->dsp.diff_bytes(s->temp[2], udst, udst - fake_ustride, width2);
561  s->dsp.diff_bytes(s->temp[2] + width2, vdst, vdst - fake_vstride, width2);
562 
563  lefty = sub_left_prediction(s, s->temp[0], s->temp[1], width , lefty);
564  leftu = sub_left_prediction(s, s->temp[1], s->temp[2], width2, leftu);
565  leftv = sub_left_prediction(s, s->temp[2], s->temp[2] + width2, width2, leftv);
566  } else {
567  lefty = sub_left_prediction(s, s->temp[0], ydst, width , lefty);
568  leftu = sub_left_prediction(s, s->temp[1], udst, width2, leftu);
569  leftv = sub_left_prediction(s, s->temp[2], vdst, width2, leftv);
570  }
571 
572  encode_422_bitstream(s, 0, width);
573  }
574  }
575  } else if(avctx->pix_fmt == AV_PIX_FMT_RGB32) {
576  uint8_t *data = p->data[0] + (height - 1) * p->linesize[0];
577  const int stride = -p->linesize[0];
578  const int fake_stride = -fake_ystride;
579  int y;
580  int leftr, leftg, leftb, lefta;
581 
582  put_bits(&s->pb, 8, lefta = data[A]);
583  put_bits(&s->pb, 8, leftr = data[R]);
584  put_bits(&s->pb, 8, leftg = data[G]);
585  put_bits(&s->pb, 8, leftb = data[B]);
586 
587  sub_left_prediction_bgr32(s, s->temp[0], data + 4, width - 1,
588  &leftr, &leftg, &leftb, &lefta);
589  encode_bgra_bitstream(s, width - 1, 4);
590 
591  for (y = 1; y < s->height; y++) {
592  uint8_t *dst = data + y*stride;
593  if (s->predictor == PLANE && s->interlaced < y) {
594  s->dsp.diff_bytes(s->temp[1], dst, dst - fake_stride, width * 4);
595  sub_left_prediction_bgr32(s, s->temp[0], s->temp[1], width,
596  &leftr, &leftg, &leftb, &lefta);
597  } else {
598  sub_left_prediction_bgr32(s, s->temp[0], dst, width,
599  &leftr, &leftg, &leftb, &lefta);
600  }
601  encode_bgra_bitstream(s, width, 4);
602  }
603  } else if (avctx->pix_fmt == AV_PIX_FMT_RGB24) {
604  uint8_t *data = p->data[0] + (height - 1) * p->linesize[0];
605  const int stride = -p->linesize[0];
606  const int fake_stride = -fake_ystride;
607  int y;
608  int leftr, leftg, leftb;
609 
610  put_bits(&s->pb, 8, leftr = data[0]);
611  put_bits(&s->pb, 8, leftg = data[1]);
612  put_bits(&s->pb, 8, leftb = data[2]);
613  put_bits(&s->pb, 8, 0);
614 
615  sub_left_prediction_rgb24(s, s->temp[0], data + 3, width - 1,
616  &leftr, &leftg, &leftb);
617  encode_bgra_bitstream(s, width-1, 3);
618 
619  for (y = 1; y < s->height; y++) {
620  uint8_t *dst = data + y * stride;
621  if (s->predictor == PLANE && s->interlaced < y) {
622  s->dsp.diff_bytes(s->temp[1], dst, dst - fake_stride,
623  width * 3);
624  sub_left_prediction_rgb24(s, s->temp[0], s->temp[1], width,
625  &leftr, &leftg, &leftb);
626  } else {
627  sub_left_prediction_rgb24(s, s->temp[0], dst, width,
628  &leftr, &leftg, &leftb);
629  }
630  encode_bgra_bitstream(s, width, 3);
631  }
632  } else {
633  av_log(avctx, AV_LOG_ERROR, "Format not supported!\n");
634  }
635  emms_c();
636 
637  size += (put_bits_count(&s->pb) + 31) / 8;
638  put_bits(&s->pb, 16, 0);
639  put_bits(&s->pb, 15, 0);
640  size /= 4;
641 
642  if ((s->flags&CODEC_FLAG_PASS1) && (s->picture_number & 31) == 0) {
643  int j;
644  char *p = avctx->stats_out;
645  char *end = p + 1024*30;
646  for (i = 0; i < 3; i++) {
647  for (j = 0; j < 256; j++) {
648  snprintf(p, end-p, "%"PRIu64" ", s->stats[i][j]);
649  p += strlen(p);
650  s->stats[i][j]= 0;
651  }
652  snprintf(p, end-p, "\n");
653  p++;
654  }
655  } else
656  avctx->stats_out[0] = '\0';
657  if (!(s->avctx->flags2 & CODEC_FLAG2_NO_OUTPUT)) {
658  flush_put_bits(&s->pb);
659  s->dsp.bswap_buf((uint32_t*)pkt->data, (uint32_t*)pkt->data, size);
660  }
661 
662  s->picture_number++;
663 
664  pkt->size = size * 4;
665  pkt->flags |= AV_PKT_FLAG_KEY;
666  *got_packet = 1;
667 
668  return 0;
669 }
670 
672 {
673  HYuvContext *s = avctx->priv_data;
674 
676 
677  av_freep(&avctx->extradata);
678  av_freep(&avctx->stats_out);
679 
680  av_frame_free(&avctx->coded_frame);
681 
682  return 0;
683 }
684 
685 #if CONFIG_HUFFYUV_ENCODER
686 AVCodec ff_huffyuv_encoder = {
687  .name = "huffyuv",
688  .long_name = NULL_IF_CONFIG_SMALL("Huffyuv / HuffYUV"),
689  .type = AVMEDIA_TYPE_VIDEO,
690  .id = AV_CODEC_ID_HUFFYUV,
691  .priv_data_size = sizeof(HYuvContext),
692  .init = encode_init,
693  .encode2 = encode_frame,
694  .close = encode_end,
695  .pix_fmts = (const enum AVPixelFormat[]){
698  },
699 };
700 #endif
701 
702 #if CONFIG_FFVHUFF_ENCODER
703 AVCodec ff_ffvhuff_encoder = {
704  .name = "ffvhuff",
705  .long_name = NULL_IF_CONFIG_SMALL("Huffyuv FFmpeg variant"),
706  .type = AVMEDIA_TYPE_VIDEO,
707  .id = AV_CODEC_ID_FFVHUFF,
708  .priv_data_size = sizeof(HYuvContext),
709  .init = encode_init,
710  .encode2 = encode_frame,
711  .close = encode_end,
712  .pix_fmts = (const enum AVPixelFormat[]){
715  },
716 };
717 #endif