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magicyuv.c
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1 /*
2  * MagicYUV decoder
3  * Copyright (c) 2016 Paul B Mahol
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include <stdlib.h>
23 #include <string.h>
24 
25 #include "libavutil/pixdesc.h"
26 #include "libavutil/qsort.h"
27 
28 #include "avcodec.h"
29 #include "bytestream.h"
30 #include "get_bits.h"
31 #include "huffyuvdsp.h"
32 #include "internal.h"
33 #include "lossless_videodsp.h"
34 #include "thread.h"
35 
36 typedef struct Slice {
37  uint32_t start;
38  uint32_t size;
39 } Slice;
40 
41 typedef enum Prediction {
42  LEFT = 1,
45 } Prediction;
46 
47 typedef struct HuffEntry {
48  uint16_t sym;
50  uint32_t code;
51 } HuffEntry;
52 
53 typedef struct MagicYUVContext {
55  int max;
56  int bps;
58  int nb_slices;
59  int planes; // number of encoded planes in bitstream
60  int decorrelate; // postprocessing work
61  int color_matrix; // video color matrix
62  int flags;
63  int interlaced; // video is interlaced
64  uint8_t *buf; // pointer to AVPacket->data
65  int hshift[4];
66  int vshift[4];
67  Slice *slices[4]; // slice bitstream positions for each plane
68  unsigned int slices_size[4]; // slice sizes for each plane
69  uint8_t len[4][4096]; // table of code lengths for each plane
70  VLC vlc[4]; // VLC for each plane
72  int (*magy_decode_slice)(AVCodecContext *avctx, void *tdata,
73  int j, int threadnr);
76 
77 static int huff_cmp_len(const void *a, const void *b)
78 {
79  const HuffEntry *aa = a, *bb = b;
80  return (aa->len - bb->len) * 256 + aa->sym - bb->sym;
81 }
82 
83 static int huff_cmp_len10(const void *a, const void *b)
84 {
85  const HuffEntry *aa = a, *bb = b;
86  return (aa->len - bb->len) * 1024 + aa->sym - bb->sym;
87 }
88 
89 static int huff_cmp_len12(const void *a, const void *b)
90 {
91  const HuffEntry *aa = a, *bb = b;
92  return (aa->len - bb->len) * 4096 + aa->sym - bb->sym;
93 }
94 
95 static int huff_build10(VLC *vlc, uint8_t *len)
96 {
97  HuffEntry he[1024];
98  uint32_t codes[1024];
99  uint8_t bits[1024];
100  uint16_t syms[1024];
101  uint32_t code;
102  int i;
103 
104  for (i = 0; i < 1024; i++) {
105  he[i].sym = 1023 - i;
106  he[i].len = len[i];
107  if (len[i] == 0 || len[i] > 32)
108  return AVERROR_INVALIDDATA;
109  }
110  AV_QSORT(he, 1024, HuffEntry, huff_cmp_len10);
111 
112  code = 1;
113  for (i = 1023; i >= 0; i--) {
114  codes[i] = code >> (32 - he[i].len);
115  bits[i] = he[i].len;
116  syms[i] = he[i].sym;
117  code += 0x80000000u >> (he[i].len - 1);
118  }
119 
120  ff_free_vlc(vlc);
121  return ff_init_vlc_sparse(vlc, FFMIN(he[1023].len, 12), 1024,
122  bits, sizeof(*bits), sizeof(*bits),
123  codes, sizeof(*codes), sizeof(*codes),
124  syms, sizeof(*syms), sizeof(*syms), 0);
125 }
126 
127 static int huff_build12(VLC *vlc, uint8_t *len)
128 {
129  HuffEntry he[4096];
130  uint32_t codes[4096];
131  uint8_t bits[4096];
132  uint16_t syms[4096];
133  uint32_t code;
134  int i;
135 
136  for (i = 0; i < 4096; i++) {
137  he[i].sym = 4095 - i;
138  he[i].len = len[i];
139  if (len[i] == 0 || len[i] > 32)
140  return AVERROR_INVALIDDATA;
141  }
142  AV_QSORT(he, 4096, HuffEntry, huff_cmp_len12);
143 
144  code = 1;
145  for (i = 4095; i >= 0; i--) {
146  codes[i] = code >> (32 - he[i].len);
147  bits[i] = he[i].len;
148  syms[i] = he[i].sym;
149  code += 0x80000000u >> (he[i].len - 1);
150  }
151 
152  ff_free_vlc(vlc);
153  return ff_init_vlc_sparse(vlc, FFMIN(he[4095].len, 14), 4096,
154  bits, sizeof(*bits), sizeof(*bits),
155  codes, sizeof(*codes), sizeof(*codes),
156  syms, sizeof(*syms), sizeof(*syms), 0);
157 }
158 
159 static int huff_build(VLC *vlc, uint8_t *len)
160 {
161  HuffEntry he[256];
162  uint32_t codes[256];
163  uint8_t bits[256];
164  uint8_t syms[256];
165  uint32_t code;
166  int i;
167 
168  for (i = 0; i < 256; i++) {
169  he[i].sym = 255 - i;
170  he[i].len = len[i];
171  if (len[i] == 0 || len[i] > 32)
172  return AVERROR_INVALIDDATA;
173  }
174  AV_QSORT(he, 256, HuffEntry, huff_cmp_len);
175 
176  code = 1;
177  for (i = 255; i >= 0; i--) {
178  codes[i] = code >> (32 - he[i].len);
179  bits[i] = he[i].len;
180  syms[i] = he[i].sym;
181  code += 0x80000000u >> (he[i].len - 1);
182  }
183 
184  ff_free_vlc(vlc);
185  return ff_init_vlc_sparse(vlc, FFMIN(he[255].len, 12), 256,
186  bits, sizeof(*bits), sizeof(*bits),
187  codes, sizeof(*codes), sizeof(*codes),
188  syms, sizeof(*syms), sizeof(*syms), 0);
189 }
190 
191 static void magicyuv_median_pred16(uint16_t *dst, const uint16_t *src1,
192  const uint16_t *diff, intptr_t w,
193  int *left, int *left_top, int max)
194 {
195  int i;
196  uint16_t l, lt;
197 
198  l = *left;
199  lt = *left_top;
200 
201  for (i = 0; i < w; i++) {
202  l = mid_pred(l, src1[i], (l + src1[i] - lt)) + diff[i];
203  l &= max;
204  lt = src1[i];
205  dst[i] = l;
206  }
207 
208  *left = l;
209  *left_top = lt;
210 }
211 
212 static int magy_decode_slice10(AVCodecContext *avctx, void *tdata,
213  int j, int threadnr)
214 {
215  MagicYUVContext *s = avctx->priv_data;
216  int interlaced = s->interlaced;
217  const int bps = s->bps;
218  const int max = s->max - 1;
219  AVFrame *p = s->p;
220  int i, k, x;
221  GetBitContext gb;
222  uint16_t *dst;
223 
224  for (i = 0; i < s->planes; i++) {
225  int left, lefttop, top;
226  int height = AV_CEIL_RSHIFT(FFMIN(s->slice_height, avctx->coded_height - j * s->slice_height), s->vshift[i]);
227  int width = AV_CEIL_RSHIFT(avctx->coded_width, s->hshift[i]);
228  int sheight = AV_CEIL_RSHIFT(s->slice_height, s->vshift[i]);
229  ptrdiff_t fake_stride = (p->linesize[i] / 2) * (1 + interlaced);
230  ptrdiff_t stride = p->linesize[i] / 2;
231  int flags, pred;
232  int ret = init_get_bits8(&gb, s->buf + s->slices[i][j].start,
233  s->slices[i][j].size);
234 
235  if (ret < 0)
236  return ret;
237 
238  flags = get_bits(&gb, 8);
239  pred = get_bits(&gb, 8);
240 
241  dst = (uint16_t *)p->data[i] + j * sheight * stride;
242  if (flags & 1) {
243  for (k = 0; k < height; k++) {
244  for (x = 0; x < width; x++)
245  dst[x] = get_bits(&gb, bps);
246 
247  dst += stride;
248  }
249  } else {
250  for (k = 0; k < height; k++) {
251  for (x = 0; x < width; x++) {
252  int pix;
253  if (get_bits_left(&gb) <= 0)
254  return AVERROR_INVALIDDATA;
255 
256  pix = get_vlc2(&gb, s->vlc[i].table, s->vlc[i].bits, 3);
257  if (pix < 0)
258  return AVERROR_INVALIDDATA;
259 
260  dst[x] = max - pix;
261  }
262  dst += stride;
263  }
264  }
265 
266  switch (pred) {
267  case LEFT:
268  dst = (uint16_t *)p->data[i] + j * sheight * stride;
269  s->llviddsp.add_left_pred_int16(dst, dst, max, width, 0);
270  dst += stride;
271  if (interlaced) {
272  s->llviddsp.add_left_pred_int16(dst, dst, max, width, 0);
273  dst += stride;
274  }
275  for (k = 1 + interlaced; k < height; k++) {
276  s->llviddsp.add_left_pred_int16(dst, dst, max, width, dst[-fake_stride]);
277  dst += stride;
278  }
279  break;
280  case GRADIENT:
281  dst = (uint16_t *)p->data[i] + j * sheight * stride;
282  s->llviddsp.add_left_pred_int16(dst, dst, max, width, 0);
283  dst += stride;
284  if (interlaced) {
285  s->llviddsp.add_left_pred_int16(dst, dst, max, width, 0);
286  dst += stride;
287  }
288  for (k = 1 + interlaced; k < height; k++) {
289  top = dst[-fake_stride];
290  left = top + dst[0];
291  dst[0] = left & max;
292  for (x = 1; x < width; x++) {
293  top = dst[x - fake_stride];
294  lefttop = dst[x - (fake_stride + 1)];
295  left += top - lefttop + dst[x];
296  dst[x] = left & max;
297  }
298  dst += stride;
299  }
300  break;
301  case MEDIAN:
302  dst = (uint16_t *)p->data[i] + j * sheight * stride;
303  s->llviddsp.add_left_pred_int16(dst, dst, max, width, 0);
304  dst += stride;
305  if (interlaced) {
306  s->llviddsp.add_left_pred_int16(dst, dst, max, width, 0);
307  dst += stride;
308  }
309  lefttop = left = dst[0];
310  for (k = 1 + interlaced; k < height; k++) {
311  magicyuv_median_pred16(dst, dst - fake_stride, dst, width, &left, &lefttop, max);
312  lefttop = left = dst[0];
313  dst += stride;
314  }
315  break;
316  default:
317  avpriv_request_sample(avctx, "Unknown prediction: %d", pred);
318  }
319  }
320 
321  if (s->decorrelate) {
322  int height = FFMIN(s->slice_height, avctx->coded_height - j * s->slice_height);
323  int width = avctx->coded_width;
324  uint16_t *r = (uint16_t *)p->data[0] + j * s->slice_height * p->linesize[0] / 2;
325  uint16_t *g = (uint16_t *)p->data[1] + j * s->slice_height * p->linesize[1] / 2;
326  uint16_t *b = (uint16_t *)p->data[2] + j * s->slice_height * p->linesize[2] / 2;
327 
328  for (i = 0; i < height; i++) {
329  for (k = 0; k < width; k++) {
330  b[k] = (b[k] + g[k]) & max;
331  r[k] = (r[k] + g[k]) & max;
332  }
333  b += p->linesize[0] / 2;
334  g += p->linesize[1] / 2;
335  r += p->linesize[2] / 2;
336  }
337  }
338 
339  return 0;
340 }
341 
342 static int magy_decode_slice(AVCodecContext *avctx, void *tdata,
343  int j, int threadnr)
344 {
345  MagicYUVContext *s = avctx->priv_data;
346  int interlaced = s->interlaced;
347  AVFrame *p = s->p;
348  int i, k, x;
349  GetBitContext gb;
350  uint8_t *dst;
351 
352  for (i = 0; i < s->planes; i++) {
353  int left, lefttop, top;
354  int height = AV_CEIL_RSHIFT(FFMIN(s->slice_height, avctx->coded_height - j * s->slice_height), s->vshift[i]);
355  int width = AV_CEIL_RSHIFT(avctx->coded_width, s->hshift[i]);
356  int sheight = AV_CEIL_RSHIFT(s->slice_height, s->vshift[i]);
357  ptrdiff_t fake_stride = p->linesize[i] * (1 + interlaced);
358  ptrdiff_t stride = p->linesize[i];
359  int flags, pred;
360  int ret = init_get_bits8(&gb, s->buf + s->slices[i][j].start,
361  s->slices[i][j].size);
362 
363  if (ret < 0)
364  return ret;
365 
366  flags = get_bits(&gb, 8);
367  pred = get_bits(&gb, 8);
368 
369  dst = p->data[i] + j * sheight * stride;
370  if (flags & 1) {
371  for (k = 0; k < height; k++) {
372  for (x = 0; x < width; x++)
373  dst[x] = get_bits(&gb, 8);
374 
375  dst += stride;
376  }
377  } else {
378  for (k = 0; k < height; k++) {
379  for (x = 0; x < width; x++) {
380  int pix;
381  if (get_bits_left(&gb) <= 0)
382  return AVERROR_INVALIDDATA;
383 
384  pix = get_vlc2(&gb, s->vlc[i].table, s->vlc[i].bits, 3);
385  if (pix < 0)
386  return AVERROR_INVALIDDATA;
387 
388  dst[x] = 255 - pix;
389  }
390  dst += stride;
391  }
392  }
393 
394  switch (pred) {
395  case LEFT:
396  dst = p->data[i] + j * sheight * stride;
397  s->llviddsp.add_left_pred(dst, dst, width, 0);
398  dst += stride;
399  if (interlaced) {
400  s->llviddsp.add_left_pred(dst, dst, width, 0);
401  dst += stride;
402  }
403  for (k = 1 + interlaced; k < height; k++) {
404  s->llviddsp.add_left_pred(dst, dst, width, dst[-fake_stride]);
405  dst += stride;
406  }
407  break;
408  case GRADIENT:
409  dst = p->data[i] + j * sheight * stride;
410  s->llviddsp.add_left_pred(dst, dst, width, 0);
411  dst += stride;
412  if (interlaced) {
413  s->llviddsp.add_left_pred(dst, dst, width, 0);
414  dst += stride;
415  }
416  for (k = 1 + interlaced; k < height; k++) {
417  top = dst[-fake_stride];
418  left = top + dst[0];
419  dst[0] = left;
420  for (x = 1; x < width; x++) {
421  top = dst[x - fake_stride];
422  lefttop = dst[x - (fake_stride + 1)];
423  left += top - lefttop + dst[x];
424  dst[x] = left;
425  }
426  dst += stride;
427  }
428  break;
429  case MEDIAN:
430  dst = p->data[i] + j * sheight * stride;
431  s->llviddsp.add_left_pred(dst, dst, width, 0);
432  dst += stride;
433  if (interlaced) {
434  s->llviddsp.add_left_pred(dst, dst, width, 0);
435  dst += stride;
436  }
437  lefttop = left = dst[0];
438  for (k = 1 + interlaced; k < height; k++) {
439  s->llviddsp.add_median_pred(dst, dst - fake_stride,
440  dst, width, &left, &lefttop);
441  lefttop = left = dst[0];
442  dst += stride;
443  }
444  break;
445  default:
446  avpriv_request_sample(avctx, "Unknown prediction: %d", pred);
447  }
448  }
449 
450  if (s->decorrelate) {
451  int height = FFMIN(s->slice_height, avctx->coded_height - j * s->slice_height);
452  int width = avctx->coded_width;
453  uint8_t *b = p->data[0] + j * s->slice_height * p->linesize[0];
454  uint8_t *g = p->data[1] + j * s->slice_height * p->linesize[1];
455  uint8_t *r = p->data[2] + j * s->slice_height * p->linesize[2];
456 
457  for (i = 0; i < height; i++) {
458  s->llviddsp.add_bytes(b, g, width);
459  s->llviddsp.add_bytes(r, g, width);
460  b += p->linesize[0];
461  g += p->linesize[1];
462  r += p->linesize[2];
463  }
464  }
465 
466  return 0;
467 }
468 
469 static int build_huffman(AVCodecContext *avctx, GetBitContext *gbit, int max)
470 {
471  MagicYUVContext *s = avctx->priv_data;
472  int i = 0, j = 0, k;
473 
474  memset(s->len, 0, sizeof(s->len));
475  while (get_bits_left(gbit) >= 8) {
476  int b = get_bits(gbit, 1);
477  int x = get_bits(gbit, 7);
478  int l = get_bitsz(gbit, b * 8) + 1;
479 
480  for (k = 0; k < l; k++)
481  if (j + k < max)
482  s->len[i][j + k] = x;
483 
484  j += l;
485  if (j == max) {
486  j = 0;
487  if (s->huff_build(&s->vlc[i], s->len[i])) {
488  av_log(avctx, AV_LOG_ERROR, "Cannot build Huffman codes\n");
489  return AVERROR_INVALIDDATA;
490  }
491  i++;
492  if (i == s->planes) {
493  break;
494  }
495  } else if (j > max) {
496  av_log(avctx, AV_LOG_ERROR, "Invalid Huffman codes\n");
497  return AVERROR_INVALIDDATA;
498  }
499  }
500 
501  if (i != s->planes) {
502  av_log(avctx, AV_LOG_ERROR, "Huffman tables too short\n");
503  return AVERROR_INVALIDDATA;
504  }
505 
506  return 0;
507 }
508 
509 static int magy_decode_frame(AVCodecContext *avctx, void *data,
510  int *got_frame, AVPacket *avpkt)
511 {
512  MagicYUVContext *s = avctx->priv_data;
513  ThreadFrame frame = { .f = data };
514  AVFrame *p = data;
515  GetByteContext gbyte;
516  GetBitContext gbit;
517  uint32_t first_offset, offset, next_offset, header_size, slice_width;
518  int width, height, format, version, table_size;
519  int ret, i, j;
520 
521  bytestream2_init(&gbyte, avpkt->data, avpkt->size);
522  if (bytestream2_get_le32(&gbyte) != MKTAG('M', 'A', 'G', 'Y'))
523  return AVERROR_INVALIDDATA;
524 
525  header_size = bytestream2_get_le32(&gbyte);
526  if (header_size < 32 || header_size >= avpkt->size) {
527  av_log(avctx, AV_LOG_ERROR,
528  "header or packet too small %"PRIu32"\n", header_size);
529  return AVERROR_INVALIDDATA;
530  }
531 
532  version = bytestream2_get_byte(&gbyte);
533  if (version != 7) {
534  avpriv_request_sample(avctx, "Version %d", version);
535  return AVERROR_PATCHWELCOME;
536  }
537 
538  s->hshift[1] =
539  s->vshift[1] =
540  s->hshift[2] =
541  s->vshift[2] = 0;
542  s->decorrelate = 0;
543  s->max = 256;
544  s->bps = 8;
545  s->huff_build = huff_build;
547 
548  format = bytestream2_get_byte(&gbyte);
549  switch (format) {
550  case 0x65:
551  avctx->pix_fmt = AV_PIX_FMT_GBRP;
552  s->decorrelate = 1;
553  break;
554  case 0x66:
555  avctx->pix_fmt = AV_PIX_FMT_GBRAP;
556  s->decorrelate = 1;
557  break;
558  case 0x67:
559  avctx->pix_fmt = AV_PIX_FMT_YUV444P;
560  break;
561  case 0x68:
562  avctx->pix_fmt = AV_PIX_FMT_YUV422P;
563  s->hshift[1] =
564  s->hshift[2] = 1;
565  break;
566  case 0x69:
567  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
568  s->hshift[1] =
569  s->vshift[1] =
570  s->hshift[2] =
571  s->vshift[2] = 1;
572  break;
573  case 0x6a:
574  avctx->pix_fmt = AV_PIX_FMT_YUVA444P;
575  break;
576  case 0x6b:
577  avctx->pix_fmt = AV_PIX_FMT_GRAY8;
578  break;
579  case 0x6c:
580  avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
581  s->hshift[1] =
582  s->hshift[2] = 1;
583  s->max = 1024;
586  s->bps = 10;
587  break;
588  case 0x6d:
589  avctx->pix_fmt = AV_PIX_FMT_GBRP10;
590  s->decorrelate = 1;
591  s->max = 1024;
594  s->bps = 10;
595  break;
596  case 0x6e:
597  avctx->pix_fmt = AV_PIX_FMT_GBRAP10;
598  s->decorrelate = 1;
599  s->max = 1024;
602  s->bps = 10;
603  break;
604  case 0x6f:
605  avctx->pix_fmt = AV_PIX_FMT_GBRP12;
606  s->decorrelate = 1;
607  s->max = 4096;
610  s->bps = 12;
611  break;
612  case 0x70:
613  avctx->pix_fmt = AV_PIX_FMT_GBRAP12;
614  s->decorrelate = 1;
615  s->max = 4096;
618  s->bps = 12;
619  break;
620  case 0x73:
621  avctx->pix_fmt = AV_PIX_FMT_GRAY10;
622  s->max = 1024;
625  s->bps = 10;
626  break;
627  default:
628  avpriv_request_sample(avctx, "Format 0x%X", format);
629  return AVERROR_PATCHWELCOME;
630  }
632 
633  bytestream2_skip(&gbyte, 1);
634  s->color_matrix = bytestream2_get_byte(&gbyte);
635  s->flags = bytestream2_get_byte(&gbyte);
636  s->interlaced = !!(s->flags & 2);
637  bytestream2_skip(&gbyte, 3);
638 
639  width = bytestream2_get_le32(&gbyte);
640  height = bytestream2_get_le32(&gbyte);
641  ret = ff_set_dimensions(avctx, width, height);
642  if (ret < 0)
643  return ret;
644 
645  slice_width = bytestream2_get_le32(&gbyte);
646  if (slice_width != avctx->coded_width) {
647  avpriv_request_sample(avctx, "Slice width %"PRIu32, slice_width);
648  return AVERROR_PATCHWELCOME;
649  }
650  s->slice_height = bytestream2_get_le32(&gbyte);
651  if (s->slice_height <= 0 || s->slice_height > INT_MAX - avctx->coded_height) {
652  av_log(avctx, AV_LOG_ERROR,
653  "invalid slice height: %d\n", s->slice_height);
654  return AVERROR_INVALIDDATA;
655  }
656 
657  bytestream2_skip(&gbyte, 4);
658 
659  s->nb_slices = (avctx->coded_height + s->slice_height - 1) / s->slice_height;
660  if (s->nb_slices > INT_MAX / sizeof(Slice)) {
661  av_log(avctx, AV_LOG_ERROR,
662  "invalid number of slices: %d\n", s->nb_slices);
663  return AVERROR_INVALIDDATA;
664  }
665 
666  for (i = 0; i < s->planes; i++) {
667  av_fast_malloc(&s->slices[i], &s->slices_size[i], s->nb_slices * sizeof(Slice));
668  if (!s->slices[i])
669  return AVERROR(ENOMEM);
670 
671  offset = bytestream2_get_le32(&gbyte);
672  if (offset >= avpkt->size - header_size)
673  return AVERROR_INVALIDDATA;
674 
675  if (i == 0)
676  first_offset = offset;
677 
678  for (j = 0; j < s->nb_slices - 1; j++) {
679  s->slices[i][j].start = offset + header_size;
680 
681  next_offset = bytestream2_get_le32(&gbyte);
682  if (next_offset <= offset || next_offset >= avpkt->size - header_size)
683  return AVERROR_INVALIDDATA;
684 
685  s->slices[i][j].size = next_offset - offset;
686  offset = next_offset;
687  }
688 
689  s->slices[i][j].start = offset + header_size;
690  s->slices[i][j].size = avpkt->size - s->slices[i][j].start;
691  }
692 
693  if (bytestream2_get_byte(&gbyte) != s->planes)
694  return AVERROR_INVALIDDATA;
695 
696  bytestream2_skip(&gbyte, s->nb_slices * s->planes);
697 
698  table_size = header_size + first_offset - bytestream2_tell(&gbyte);
699  if (table_size < 2)
700  return AVERROR_INVALIDDATA;
701 
702  ret = init_get_bits8(&gbit, avpkt->data + bytestream2_tell(&gbyte), table_size);
703  if (ret < 0)
704  return ret;
705 
706  ret = build_huffman(avctx, &gbit, s->max);
707  if (ret < 0)
708  return ret;
709 
711  p->key_frame = 1;
712 
713  if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
714  return ret;
715 
716  s->buf = avpkt->data;
717  s->p = p;
718  avctx->execute2(avctx, s->magy_decode_slice, NULL, NULL, s->nb_slices);
719 
720  if (avctx->pix_fmt == AV_PIX_FMT_GBRP ||
721  avctx->pix_fmt == AV_PIX_FMT_GBRAP ||
722  avctx->pix_fmt == AV_PIX_FMT_GBRP10 ||
723  avctx->pix_fmt == AV_PIX_FMT_GBRAP10||
724  avctx->pix_fmt == AV_PIX_FMT_GBRAP12||
725  avctx->pix_fmt == AV_PIX_FMT_GBRP12) {
726  FFSWAP(uint8_t*, p->data[0], p->data[1]);
727  FFSWAP(int, p->linesize[0], p->linesize[1]);
728  } else {
729  switch (s->color_matrix) {
730  case 1:
732  break;
733  case 2:
735  break;
736  }
738  }
739 
740  *got_frame = 1;
741 
742  return avpkt->size;
743 }
744 
745 #if HAVE_THREADS
746 static int magy_init_thread_copy(AVCodecContext *avctx)
747 {
748  MagicYUVContext *s = avctx->priv_data;
749  int i;
750 
751  for (i = 0; i < FF_ARRAY_ELEMS(s->slices); i++) {
752  s->slices[i] = NULL;
753  s->slices_size[i] = 0;
754  }
755 
756  return 0;
757 }
758 #endif
759 
761 {
762  MagicYUVContext *s = avctx->priv_data;
764  return 0;
765 }
766 
768 {
769  MagicYUVContext * const s = avctx->priv_data;
770  int i;
771 
772  for (i = 0; i < FF_ARRAY_ELEMS(s->slices); i++) {
773  av_freep(&s->slices[i]);
774  s->slices_size[i] = 0;
775  ff_free_vlc(&s->vlc[i]);
776  }
777 
778  return 0;
779 }
780 
782  .name = "magicyuv",
783  .long_name = NULL_IF_CONFIG_SMALL("MagicYUV video"),
784  .type = AVMEDIA_TYPE_VIDEO,
785  .id = AV_CODEC_ID_MAGICYUV,
786  .priv_data_size = sizeof(MagicYUVContext),
788  .init_thread_copy = ONLY_IF_THREADS_ENABLED(magy_init_thread_copy),
789  .close = magy_decode_end,
790  .decode = magy_decode_frame,
791  .capabilities = AV_CODEC_CAP_DR1 |
794  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
795 };
int(* add_left_pred_int16)(uint16_t *dst, const uint16_t *src, unsigned mask, ptrdiff_t w, unsigned left)
also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
Definition: pixfmt.h:475
#define NULL
Definition: coverity.c:32
static int build_huffman(AVCodecContext *avctx, GetBitContext *gbit, int max)
Definition: magicyuv.c:469
const char * s
Definition: avisynth_c.h:768
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
This structure describes decoded (raw) audio or video data.
Definition: frame.h:201
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:1675
#define AV_PIX_FMT_GBRAP10
Definition: pixfmt.h:388
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:67
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:261
static int init_thread_copy(AVCodecContext *avctx)
Definition: tta.c:392
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2403
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
Definition: utils.c:196
const char * g
Definition: vf_curves.c:112
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601 ...
Definition: pixfmt.h:479
int ff_init_vlc_sparse(VLC *vlc_arg, int nb_bits, int nb_codes, const void *bits, int bits_wrap, int bits_size, const void *codes, int codes_wrap, int codes_size, const void *symbols, int symbols_wrap, int symbols_size, int flags)
Definition: bitstream.c:268
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:164
int size
Definition: avcodec.h:1401
const char * b
Definition: vf_curves.c:113
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:384
static int huff_build10(VLC *vlc, uint8_t *len)
Definition: magicyuv.c:95
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1697
static av_always_inline void bytestream2_init(GetByteContext *g, const uint8_t *buf, int buf_size)
Definition: bytestream.h:133
int version
Definition: avisynth_c.h:766
unsigned int slices_size[4]
Definition: magicyuv.c:68
uint8_t len[4][4096]
Definition: magicyuv.c:69
AVCodec.
Definition: avcodec.h:3351
LLVidDSPContext llviddsp
Definition: magicyuv.c:74
#define AV_PIX_FMT_GRAY10
Definition: pixfmt.h:350
void(* add_bytes)(uint8_t *dst, uint8_t *src, ptrdiff_t w)
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:40
uint8_t
#define av_cold
Definition: attributes.h:82
Multithreading support functions.
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:343
int(* magy_decode_slice)(AVCodecContext *avctx, void *tdata, int j, int threadnr)
Definition: magicyuv.c:72
static AVFrame * frame
Prediction
Definition: magicyuv.c:41
#define height
uint8_t * data
Definition: avcodec.h:1400
static int flags
Definition: log.c:57
bitstream reader API header.
int hshift[4]
Definition: magicyuv.c:65
uint32_t code
Definition: magicyuv.c:50
static int huff_cmp_len12(const void *a, const void *b)
Definition: magicyuv.c:89
#define av_log(a,...)
static int magy_decode_slice(AVCodecContext *avctx, void *tdata, int j, int threadnr)
Definition: magicyuv.c:342
static int huff_cmp_len(const void *a, const void *b)
Definition: magicyuv.c:77
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:587
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int slice_height
Definition: magicyuv.c:57
#define AVERROR(e)
Definition: error.h:43
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:164
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
const char * r
Definition: vf_curves.c:111
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: frame.h:446
enum AVColorSpace colorspace
YUV colorspace type.
Definition: frame.h:457
uint16_t width
Definition: gdv.c:47
#define AV_PIX_FMT_GBRAP12
Definition: pixfmt.h:389
const char * name
Name of the codec implementation.
Definition: avcodec.h:3358
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:1012
Definition: vlc.h:26
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:66
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:225
Slice * slices[4]
Definition: magicyuv.c:67
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
Allocate a buffer, reusing the given one if large enough.
Definition: mem.c:483
static int huff_build12(VLC *vlc, uint8_t *len)
Definition: magicyuv.c:127
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:284
int vshift[4]
Definition: magicyuv.c:66
#define FFMIN(a, b)
Definition: common.h:96
uint8_t interlaced
Definition: mxfenc.c:1949
static int huff_cmp_len10(const void *a, const void *b)
Definition: magicyuv.c:83
Definition: magicyuv.c:36
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
Definition: get_bits.h:554
#define FF_ARRAY_ELEMS(a)
the normal 2^n-1 "JPEG" YUV ranges
Definition: pixfmt.h:499
int bits
Definition: vlc.h:27
static const float pred[4]
Definition: siprdata.h:259
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:1016
static av_cold int magy_decode_init(AVCodecContext *avctx)
Definition: magicyuv.c:760
static av_always_inline int bytestream2_tell(GetByteContext *g)
Definition: bytestream.h:188
#define src1
Definition: h264pred.c:139
uint8_t len
Definition: magicyuv.c:49
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:232
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:456
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:173
int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
main external API structure.
Definition: avcodec.h:1488
static int magy_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: magicyuv.c:509
uint32_t size
Definition: magicyuv.c:38
void ff_llviddsp_init(LLVidDSPContext *c)
uint32_t start
Definition: magicyuv.c:37
int coded_height
Definition: avcodec.h:1675
static const char * format
Definition: movenc.c:47
AVCodec ff_magicyuv_decoder
Definition: magicyuv.c:781
Definition: magicyuv.c:42
#define mid_pred
Definition: mathops.h:97
VLC vlc[4]
Definition: magicyuv.c:70
AVFrame * p
Definition: magicyuv.c:54
static int magy_decode_slice10(AVCodecContext *avctx, void *tdata, int j, int threadnr)
Definition: magicyuv.c:212
uint8_t * buf
Definition: magicyuv.c:64
#define AV_PIX_FMT_GBRP12
Definition: pixfmt.h:385
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:369
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:215
the normal 219*2^(n-8) "MPEG" YUV ranges
Definition: pixfmt.h:498
static av_cold int magy_decode_end(AVCodecContext *avctx)
Definition: magicyuv.c:767
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
int
int(* huff_build)(VLC *vlc, uint8_t *len)
Definition: magicyuv.c:71
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
Y , 8bpp.
Definition: pixfmt.h:70
common internal api header.
if(ret< 0)
Definition: vf_mcdeint.c:279
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:211
uint16_t sym
Definition: magicyuv.c:48
unsigned bps
Definition: movenc.c:1449
void * priv_data
Definition: avcodec.h:1515
static int huff_build(VLC *vlc, uint8_t *len)
Definition: magicyuv.c:159
static av_always_inline int diff(const uint32_t a, const uint32_t b)
int(* add_left_pred)(uint8_t *dst, const uint8_t *src, ptrdiff_t w, int left)
int len
int(* execute2)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count)
The codec may call this to execute several independent things.
Definition: avcodec.h:2799
VLC_TYPE(* table)[2]
code, bits
Definition: vlc.h:28
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:279
static void magicyuv_median_pred16(uint16_t *dst, const uint16_t *src1, const uint16_t *diff, intptr_t w, int *left, int *left_top, int max)
Definition: magicyuv.c:191
#define av_freep(p)
#define FFSWAP(type, a, b)
Definition: common.h:99
#define stride
#define MKTAG(a, b, c, d)
Definition: common.h:366
This structure stores compressed data.
Definition: avcodec.h:1377
void ff_free_vlc(VLC *vlc)
Definition: bitstream.c:354
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:956
#define AV_QSORT(p, num, type, cmp)
Quicksort This sort is fast, and fully inplace but not stable and it is possible to construct input t...
Definition: qsort.h:33
for(j=16;j >0;--j)
static av_always_inline int get_bitsz(GetBitContext *s, int n)
Read 0-25 bits.
Definition: get_bits.h:276
void(* add_median_pred)(uint8_t *dst, const uint8_t *top, const uint8_t *diff, ptrdiff_t w, int *left, int *left_top)
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
int color_matrix
Definition: magicyuv.c:61