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pixlet.c
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1 /*
2  * Apple Pixlet 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 <stdint.h>
23 
24 #include "libavutil/imgutils.h"
25 #include "libavutil/intmath.h"
26 #include "libavutil/opt.h"
27 
28 #include "avcodec.h"
29 #include "bytestream.h"
30 #include "get_bits.h"
31 #include "unary.h"
32 #include "internal.h"
33 #include "thread.h"
34 
35 #define NB_LEVELS 4
36 
37 #define H 0
38 #define V 1
39 
40 typedef struct SubBand {
41  unsigned width, height;
42  unsigned size;
43  unsigned x, y;
44 } SubBand;
45 
46 typedef struct PixletContext {
47  AVClass *class;
48 
51 
52  int levels;
53  int depth;
54  int h, w;
55 
56  int16_t *filter[2];
57  int16_t *prediction;
58  int64_t scaling[4][2][NB_LEVELS];
59  SubBand band[4][NB_LEVELS * 3 + 1];
61 
62 static int init_decoder(AVCodecContext *avctx)
63 {
64  PixletContext *ctx = avctx->priv_data;
65  int i, plane;
66 
67  ctx->filter[0] = av_malloc_array(ctx->h, sizeof(int16_t));
68  ctx->filter[1] = av_malloc_array(FFMAX(ctx->h, ctx->w) + 16, sizeof(int16_t));
69  ctx->prediction = av_malloc_array((ctx->w >> NB_LEVELS), sizeof(int16_t));
70  if (!ctx->filter[0] || !ctx->filter[1] || !ctx->prediction)
71  return AVERROR(ENOMEM);
72 
73  for (plane = 0; plane < 3; plane++) {
74  unsigned shift = plane > 0;
75  unsigned w = ctx->w >> shift;
76  unsigned h = ctx->h >> shift;
77 
78  ctx->band[plane][0].width = w >> NB_LEVELS;
79  ctx->band[plane][0].height = h >> NB_LEVELS;
80  ctx->band[plane][0].size = (w >> NB_LEVELS) * (h >> NB_LEVELS);
81 
82  for (i = 0; i < NB_LEVELS * 3; i++) {
83  unsigned scale = ctx->levels - (i / 3);
84 
85  ctx->band[plane][i + 1].width = w >> scale;
86  ctx->band[plane][i + 1].height = h >> scale;
87  ctx->band[plane][i + 1].size = (w >> scale) * (h >> scale);
88 
89  ctx->band[plane][i + 1].x = (w >> scale) * (((i + 1) % 3) != 2);
90  ctx->band[plane][i + 1].y = (h >> scale) * (((i + 1) % 3) != 1);
91  }
92  }
93 
94  return 0;
95 }
96 
97 static void free_buffers(AVCodecContext *avctx)
98 {
99  PixletContext *ctx = avctx->priv_data;
100 
101  av_freep(&ctx->filter[0]);
102  av_freep(&ctx->filter[1]);
103  av_freep(&ctx->prediction);
104 }
105 
107 {
108  PixletContext *ctx = avctx->priv_data;
109  free_buffers(avctx);
110  ctx->w = 0;
111  ctx->h = 0;
112  return 0;
113 }
114 
116 {
117  avctx->pix_fmt = AV_PIX_FMT_YUV420P16;
118  avctx->color_range = AVCOL_RANGE_JPEG;
119  return 0;
120 }
121 
122 static int read_low_coeffs(AVCodecContext *avctx, int16_t *dst, int size, int width, ptrdiff_t stride)
123 {
124  PixletContext *ctx = avctx->priv_data;
125  GetBitContext *b = &ctx->gbit;
126  unsigned cnt1, nbits, k, j = 0, i = 0;
127  int64_t value, state = 3;
128  int rlen, escape, flag = 0;
129 
130  while (i < size) {
131  nbits = FFMIN(ff_clz((state >> 8) + 3) ^ 0x1F, 14);
132 
133  cnt1 = get_unary(b, 0, 8);
134  if (cnt1 < 8) {
135  value = show_bits(b, nbits);
136  if (value <= 1) {
137  skip_bits(b, nbits - 1);
138  escape = ((1 << nbits) - 1) * cnt1;
139  } else {
140  skip_bits(b, nbits);
141  escape = value + ((1 << nbits) - 1) * cnt1 - 1;
142  }
143  } else {
144  escape = get_bits(b, 16);
145  }
146 
147  value = -((escape + flag) & 1) | 1;
148  dst[j++] = value * ((escape + flag + 1) >> 1);
149  i++;
150  if (j == width) {
151  j = 0;
152  dst += stride;
153  }
154  state = 120 * (escape + flag) + state - (120 * state >> 8);
155  flag = 0;
156 
157  if (state * 4ULL > 0xFF || i >= size)
158  continue;
159 
160  nbits = ((state + 8) >> 5) + (state ? ff_clz(state) : 32) - 24;
161  escape = av_mod_uintp2(16383, nbits);
162  cnt1 = get_unary(b, 0, 8);
163  if (cnt1 > 7) {
164  rlen = get_bits(b, 16);
165  } else {
166  value = show_bits(b, nbits);
167  if (value > 1) {
168  skip_bits(b, nbits);
169  rlen = value + escape * cnt1 - 1;
170  } else {
171  skip_bits(b, nbits - 1);
172  rlen = escape * cnt1;
173  }
174  }
175 
176  if (rlen > size - i)
177  return AVERROR_INVALIDDATA;
178  i += rlen;
179 
180  for (k = 0; k < rlen; k++) {
181  dst[j++] = 0;
182  if (j == width) {
183  j = 0;
184  dst += stride;
185  }
186  }
187 
188  state = 0;
189  flag = rlen < 0xFFFF ? 1 : 0;
190  }
191 
192  align_get_bits(b);
193  return get_bits_count(b) >> 3;
194 }
195 
196 static int read_high_coeffs(AVCodecContext *avctx, uint8_t *src, int16_t *dst, int size,
197  int c, int a, int d,
198  int width, ptrdiff_t stride)
199 {
200  PixletContext *ctx = avctx->priv_data;
201  GetBitContext *b = &ctx->gbit;
202  unsigned cnt1, shbits, rlen, nbits, length, i = 0, j = 0, k;
203  int ret, escape, pfx, value, yflag, xflag, flag = 0;
204  int64_t state = 3, tmp;
205 
206  if ((ret = init_get_bits8(b, src, bytestream2_get_bytes_left(&ctx->gb))) < 0)
207  return ret;
208 
209  if (a ^ (a >> 31)) {
210  nbits = 33 - ff_clz(a ^ (a >> 31));
211  if (nbits > 16)
212  return AVERROR_INVALIDDATA;
213  } else {
214  nbits = 1;
215  }
216 
217  length = 25 - nbits;
218 
219  while (i < size) {
220  if (state >> 8 != -3) {
221  value = ff_clz((state >> 8) + 3) ^ 0x1F;
222  } else {
223  value = -1;
224  }
225 
226  cnt1 = get_unary(b, 0, length);
227 
228  if (cnt1 >= length) {
229  cnt1 = get_bits(b, nbits);
230  } else {
231  pfx = 14 + ((((uint64_t)(value - 14)) >> 32) & (value - 14));
232  if (pfx < 1 || pfx > 25)
233  return AVERROR_INVALIDDATA;
234  cnt1 *= (1 << pfx) - 1;
235  shbits = show_bits(b, pfx);
236  if (shbits <= 1) {
237  skip_bits(b, pfx - 1);
238  } else {
239  skip_bits(b, pfx);
240  cnt1 += shbits - 1;
241  }
242  }
243 
244  xflag = flag + cnt1;
245  yflag = xflag;
246 
247  if (flag + cnt1 == 0) {
248  value = 0;
249  } else {
250  xflag &= 1u;
251  tmp = (int64_t)c * ((yflag + 1) >> 1) + (c >> 1);
252  value = xflag + (tmp ^ -xflag);
253  }
254 
255  i++;
256  dst[j++] = value;
257  if (j == width) {
258  j = 0;
259  dst += stride;
260  }
261  state += (int64_t)d * (uint64_t)yflag - ((int64_t)(d * (uint64_t)state) >> 8);
262 
263  flag = 0;
264 
265  if ((uint64_t)state > 0xFF / 4 || i >= size)
266  continue;
267 
268  pfx = ((state + 8) >> 5) + (state ? ff_clz(state): 32) - 24;
269  escape = av_mod_uintp2(16383, pfx);
270  cnt1 = get_unary(b, 0, 8);
271  if (cnt1 < 8) {
272  if (pfx < 1 || pfx > 25)
273  return AVERROR_INVALIDDATA;
274  value = show_bits(b, pfx);
275  if (value > 1) {
276  skip_bits(b, pfx);
277  rlen = value + escape * cnt1 - 1;
278  } else {
279  skip_bits(b, pfx - 1);
280  rlen = escape * cnt1;
281  }
282  } else {
283  if (get_bits1(b))
284  value = get_bits(b, 16);
285  else
286  value = get_bits(b, 8);
287 
288  rlen = value + 8 * escape;
289  }
290 
291  if (rlen > 0xFFFF || i + rlen > size)
292  return AVERROR_INVALIDDATA;
293  i += rlen;
294 
295  for (k = 0; k < rlen; k++) {
296  dst[j++] = 0;
297  if (j == width) {
298  j = 0;
299  dst += stride;
300  }
301  }
302 
303  state = 0;
304  flag = rlen < 0xFFFF ? 1 : 0;
305  }
306 
307  align_get_bits(b);
308  return get_bits_count(b) >> 3;
309 }
310 
311 static int read_highpass(AVCodecContext *avctx, uint8_t *ptr, int plane, AVFrame *frame)
312 {
313  PixletContext *ctx = avctx->priv_data;
314  ptrdiff_t stride = frame->linesize[plane] / 2;
315  int i, ret;
316 
317  for (i = 0; i < ctx->levels * 3; i++) {
318  int32_t a = bytestream2_get_be32(&ctx->gb);
319  int32_t b = bytestream2_get_be32(&ctx->gb);
320  int32_t c = bytestream2_get_be32(&ctx->gb);
321  int32_t d = bytestream2_get_be32(&ctx->gb);
322  int16_t *dest = (int16_t *)frame->data[plane] + ctx->band[plane][i + 1].x +
323  stride * ctx->band[plane][i + 1].y;
324  unsigned size = ctx->band[plane][i + 1].size;
325  uint32_t magic;
326 
327  magic = bytestream2_get_be32(&ctx->gb);
328  if (magic != 0xDEADBEEF) {
329  av_log(avctx, AV_LOG_ERROR, "wrong magic number: 0x%08"PRIX32
330  " for plane %d, band %d\n", magic, plane, i);
331  return AVERROR_INVALIDDATA;
332  }
333 
334  if (a == INT32_MIN)
335  return AVERROR_INVALIDDATA;
336 
337  ret = read_high_coeffs(avctx, ptr + bytestream2_tell(&ctx->gb), dest, size,
338  c, (b >= FFABS(a)) ? b : a, d,
339  ctx->band[plane][i + 1].width, stride);
340  if (ret < 0) {
341  av_log(avctx, AV_LOG_ERROR, "error in highpass coefficients for plane %d, band %d\n", plane, i);
342  return ret;
343  }
344  bytestream2_skip(&ctx->gb, ret);
345  }
346 
347  return 0;
348 }
349 
350 static void lowpass_prediction(int16_t *dst, int16_t *pred, int width, int height, ptrdiff_t stride)
351 {
352  int16_t val;
353  int i, j;
354 
355  memset(pred, 0, width * sizeof(*pred));
356 
357  for (i = 0; i < height; i++) {
358  val = pred[0] + dst[0];
359  dst[0] = pred[0] = val;
360  for (j = 1; j < width; j++) {
361  val = pred[j] + dst[j];
362  dst[j] = pred[j] = val;
363  dst[j] += dst[j-1];
364  }
365  dst += stride;
366  }
367 }
368 
369 static void filterfn(int16_t *dest, int16_t *tmp, unsigned size, int64_t scale)
370 {
371  int16_t *low, *high, *ll, *lh, *hl, *hh;
372  int hsize, i, j;
373  int64_t value;
374 
375  hsize = size >> 1;
376  low = tmp + 4;
377  high = &low[hsize + 8];
378 
379  memcpy(low, dest, size);
380  memcpy(high, dest + hsize, size);
381 
382  ll = &low[hsize];
383  lh = &low[hsize];
384  hl = &high[hsize];
385  hh = hl;
386  for (i = 4, j = 2; i; i--, j++, ll--, hh++, lh++, hl--) {
387  low[i - 5] = low[j - 1];
388  lh[0] = ll[-1];
389  high[i - 5] = high[j - 2];
390  hh[0] = hl[-2];
391  }
392 
393  for (i = 0; i < hsize; i++) {
394  value = (int64_t) low [i + 1] * -INT64_C(325392907) +
395  (int64_t) low [i + 0] * INT64_C(3687786320) +
396  (int64_t) low [i - 1] * -INT64_C(325392907) +
397  (int64_t) high[i + 0] * INT64_C(1518500249) +
398  (int64_t) high[i - 1] * INT64_C(1518500249);
399  dest[i * 2] = av_clip_int16(((value >> 32) * scale) >> 32);
400  }
401 
402  for (i = 0; i < hsize; i++) {
403  value = (int64_t) low [i + 2] * -INT64_C(65078576) +
404  (int64_t) low [i + 1] * INT64_C(1583578880) +
405  (int64_t) low [i + 0] * INT64_C(1583578880) +
406  (int64_t) low [i - 1] * -INT64_C(65078576) +
407  (int64_t) high[i + 1] * INT64_C(303700064) +
408  (int64_t) high[i + 0] * -INT64_C(3644400640) +
409  (int64_t) high[i - 1] * INT64_C(303700064);
410  dest[i * 2 + 1] = av_clip_int16(((value >> 32) * scale) >> 32);
411  }
412 }
413 
414 static void reconstruction(AVCodecContext *avctx,
415  int16_t *dest, unsigned width, unsigned height, ptrdiff_t stride, int nb_levels,
416  int64_t *scaling_H, int64_t *scaling_V)
417 {
418  PixletContext *ctx = avctx->priv_data;
419  unsigned scaled_width, scaled_height;
420  int64_t scale_H, scale_V;
421  int16_t *ptr, *tmp;
422  int i, j, k;
423 
424  scaled_height = height >> nb_levels;
425  scaled_width = width >> nb_levels;
426  tmp = ctx->filter[0];
427 
428  for (i = 0; i < nb_levels; i++) {
429  scaled_width <<= 1;
430  scaled_height <<= 1;
431  scale_H = scaling_H[i];
432  scale_V = scaling_V[i];
433 
434  ptr = dest;
435  for (j = 0; j < scaled_height; j++) {
436  filterfn(ptr, ctx->filter[1], scaled_width, scale_V);
437  ptr += stride;
438  }
439 
440  for (j = 0; j < scaled_width; j++) {
441  ptr = dest + j;
442  for (k = 0; k < scaled_height; k++) {
443  tmp[k] = *ptr;
444  ptr += stride;
445  }
446 
447  filterfn(tmp, ctx->filter[1], scaled_height, scale_H);
448 
449  ptr = dest + j;
450  for (k = 0; k < scaled_height; k++) {
451  *ptr = tmp[k];
452  ptr += stride;
453  }
454  }
455  }
456 }
457 
458 static void postprocess_luma(AVFrame *frame, int w, int h, int depth)
459 {
460  uint16_t *dsty = (uint16_t *)frame->data[0];
461  int16_t *srcy = (int16_t *)frame->data[0];
462  ptrdiff_t stridey = frame->linesize[0] / 2;
463  int i, j;
464 
465  for (j = 0; j < h; j++) {
466  for (i = 0; i < w; i++) {
467  if (srcy[i] <= 0)
468  dsty[i] = 0;
469  else if (srcy[i] > ((1 << depth) - 1))
470  dsty[i] = 65535;
471  else
472  dsty[i] = ((int64_t) srcy[i] * srcy[i] * 65535) /
473  ((1 << depth) - 1) / ((1 << depth) - 1);
474  }
475  dsty += stridey;
476  srcy += stridey;
477  }
478 }
479 
480 static void postprocess_chroma(AVFrame *frame, int w, int h, int depth)
481 {
482  uint16_t *dstu = (uint16_t *)frame->data[1];
483  uint16_t *dstv = (uint16_t *)frame->data[2];
484  int16_t *srcu = (int16_t *)frame->data[1];
485  int16_t *srcv = (int16_t *)frame->data[2];
486  ptrdiff_t strideu = frame->linesize[1] / 2;
487  ptrdiff_t stridev = frame->linesize[2] / 2;
488  const unsigned add = 1 << (depth - 1);
489  const unsigned shift = 16 - depth;
490  int i, j;
491 
492  for (j = 0; j < h; j++) {
493  for (i = 0; i < w; i++) {
494  dstu[i] = av_clip_uintp2_c(add + srcu[i], depth) << shift;
495  dstv[i] = av_clip_uintp2_c(add + srcv[i], depth) << shift;
496  }
497  dstu += strideu;
498  dstv += stridev;
499  srcu += strideu;
500  srcv += stridev;
501  }
502 }
503 
504 static int decode_plane(AVCodecContext *avctx, int plane, AVPacket *avpkt, AVFrame *frame)
505 {
506  PixletContext *ctx = avctx->priv_data;
507  ptrdiff_t stride = frame->linesize[plane] / 2;
508  unsigned shift = plane > 0;
509  int16_t *dst;
510  int i, ret;
511 
512  for (i = ctx->levels - 1; i >= 0; i--) {
513  int32_t h = sign_extend(bytestream2_get_be32(&ctx->gb), 32);
514  int32_t v = sign_extend(bytestream2_get_be32(&ctx->gb), 32);
515 
516  if (!h || !v)
517  return AVERROR_INVALIDDATA;
518 
519  ctx->scaling[plane][H][i] = (1000000ULL << 32) / h;
520  ctx->scaling[plane][V][i] = (1000000ULL << 32) / v;
521  }
522 
523  bytestream2_skip(&ctx->gb, 4);
524 
525  dst = (int16_t *)frame->data[plane];
526  dst[0] = sign_extend(bytestream2_get_be16(&ctx->gb), 16);
527 
528  if ((ret = init_get_bits8(&ctx->gbit, avpkt->data + bytestream2_tell(&ctx->gb),
529  bytestream2_get_bytes_left(&ctx->gb))) < 0)
530  return ret;
531 
532  ret = read_low_coeffs(avctx, dst + 1, ctx->band[plane][0].width - 1, ctx->band[plane][0].width - 1, 0);
533  if (ret < 0) {
534  av_log(avctx, AV_LOG_ERROR, "error in lowpass coefficients for plane %d, top row\n", plane);
535  return ret;
536  }
537 
538  ret = read_low_coeffs(avctx, dst + stride, ctx->band[plane][0].height - 1, 1, stride);
539  if (ret < 0) {
540  av_log(avctx, AV_LOG_ERROR, "error in lowpass coefficients for plane %d, left column\n", plane);
541  return ret;
542  }
543 
544  ret = read_low_coeffs(avctx, dst + stride + 1,
545  (ctx->band[plane][0].width - 1) * (ctx->band[plane][0].height - 1),
546  ctx->band[plane][0].width - 1, stride);
547  if (ret < 0) {
548  av_log(avctx, AV_LOG_ERROR, "error in lowpass coefficients for plane %d, rest\n", plane);
549  return ret;
550  }
551 
552  bytestream2_skip(&ctx->gb, ret);
553  if (bytestream2_get_bytes_left(&ctx->gb) <= 0) {
554  av_log(avctx, AV_LOG_ERROR, "no bytes left\n");
555  return AVERROR_INVALIDDATA;
556  }
557 
558  ret = read_highpass(avctx, avpkt->data, plane, frame);
559  if (ret < 0)
560  return ret;
561 
562  lowpass_prediction(dst, ctx->prediction,
563  ctx->band[plane][0].width, ctx->band[plane][0].height, stride);
564 
565  reconstruction(avctx, (int16_t *)frame->data[plane], ctx->w >> shift, ctx->h >> shift,
566  stride, NB_LEVELS, ctx->scaling[plane][H], ctx->scaling[plane][V]);
567 
568  return 0;
569 }
570 
571 static int pixlet_decode_frame(AVCodecContext *avctx, void *data,
572  int *got_frame, AVPacket *avpkt)
573 {
574  PixletContext *ctx = avctx->priv_data;
575  int i, w, h, width, height, ret, version;
576  AVFrame *p = data;
577  ThreadFrame frame = { .f = data };
578  uint32_t pktsize;
579 
580  bytestream2_init(&ctx->gb, avpkt->data, avpkt->size);
581 
582  pktsize = bytestream2_get_be32(&ctx->gb);
583  if (pktsize <= 44 || pktsize - 4 > bytestream2_get_bytes_left(&ctx->gb)) {
584  av_log(avctx, AV_LOG_ERROR, "Invalid packet size %"PRIu32"\n", pktsize);
585  return AVERROR_INVALIDDATA;
586  }
587 
588  version = bytestream2_get_le32(&ctx->gb);
589  if (version != 1)
590  avpriv_request_sample(avctx, "Version %d", version);
591 
592  bytestream2_skip(&ctx->gb, 4);
593  if (bytestream2_get_be32(&ctx->gb) != 1)
594  return AVERROR_INVALIDDATA;
595  bytestream2_skip(&ctx->gb, 4);
596 
597  width = bytestream2_get_be32(&ctx->gb);
598  height = bytestream2_get_be32(&ctx->gb);
599 
600  if ( width > INT_MAX - (1U << (NB_LEVELS + 1))
601  || height > INT_MAX - (1U << (NB_LEVELS + 1)))
602  return AVERROR_INVALIDDATA;
603 
604  w = FFALIGN(width, 1 << (NB_LEVELS + 1));
605  h = FFALIGN(height, 1 << (NB_LEVELS + 1));
606 
607  ctx->levels = bytestream2_get_be32(&ctx->gb);
608  if (ctx->levels != NB_LEVELS)
609  return AVERROR_INVALIDDATA;
610  ctx->depth = bytestream2_get_be32(&ctx->gb);
611  if (ctx->depth < 8 || ctx->depth > 15) {
612  avpriv_request_sample(avctx, "Depth %d", ctx->depth);
613  return AVERROR_INVALIDDATA;
614  }
615 
616  ret = ff_set_dimensions(avctx, w, h);
617  if (ret < 0)
618  return ret;
619  avctx->width = width;
620  avctx->height = height;
621 
622  if (ctx->w != w || ctx->h != h) {
623  free_buffers(avctx);
624  ctx->w = w;
625  ctx->h = h;
626 
627  ret = init_decoder(avctx);
628  if (ret < 0) {
629  free_buffers(avctx);
630  ctx->w = 0;
631  ctx->h = 0;
632  return ret;
633  }
634  }
635 
636  bytestream2_skip(&ctx->gb, 8);
637 
639  p->key_frame = 1;
641 
642  ret = ff_thread_get_buffer(avctx, &frame, 0);
643  if (ret < 0)
644  return ret;
645 
646  for (i = 0; i < 3; i++) {
647  ret = decode_plane(avctx, i, avpkt, frame.f);
648  if (ret < 0)
649  return ret;
650  if (avctx->flags & AV_CODEC_FLAG_GRAY)
651  break;
652  }
653 
654  postprocess_luma(frame.f, ctx->w, ctx->h, ctx->depth);
655  postprocess_chroma(frame.f, ctx->w >> 1, ctx->h >> 1, ctx->depth);
656 
657  *got_frame = 1;
658 
659  return pktsize;
660 }
661 
662 #if HAVE_THREADS
663 static int pixlet_init_thread_copy(AVCodecContext *avctx)
664 {
665  PixletContext *ctx = avctx->priv_data;
666 
667  ctx->filter[0] = NULL;
668  ctx->filter[1] = NULL;
669  ctx->prediction = NULL;
670  ctx->w = ctx->h = 0;
671 
672  return 0;
673 }
674 #endif
675 
677  .name = "pixlet",
678  .long_name = NULL_IF_CONFIG_SMALL("Apple Pixlet"),
679  .type = AVMEDIA_TYPE_VIDEO,
680  .id = AV_CODEC_ID_PIXLET,
681  .init = pixlet_init,
682  .init_thread_copy = ONLY_IF_THREADS_ENABLED(pixlet_init_thread_copy),
683  .close = pixlet_close,
684  .decode = pixlet_decode_frame,
685  .priv_data_size = sizeof(PixletContext),
686  .capabilities = AV_CODEC_CAP_DR1 |
688  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
690 };
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:48
int plane
Definition: avisynth_c.h:422
SubBand band[4][NB_LEVELS *3+1]
Definition: pixlet.c:59
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:771
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int16_t * filter[2]
Definition: pixlet.c:56
static int shift(int a, int b)
Definition: sonic.c:82
This structure describes decoded (raw) audio or video data.
Definition: frame.h:187
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
misc image utilities
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:261
AVFrame * f
Definition: thread.h:36
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:210
static void reconstruction(AVCodecContext *avctx, int16_t *dest, unsigned width, unsigned height, ptrdiff_t stride, int nb_levels, int64_t *scaling_H, int64_t *scaling_V)
Definition: pixlet.c:414
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: avcodec.h:2469
int size
Definition: avcodec.h:1658
const char * b
Definition: vf_curves.c:113
int flag
Definition: cpu.c:34
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1960
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
static int read_low_coeffs(AVCodecContext *avctx, int16_t *dst, int size, int width, ptrdiff_t stride)
Definition: pixlet.c:122
#define src
Definition: vp8dsp.c:254
AVCodec.
Definition: avcodec.h:3681
int width
Definition: cfhd.h:48
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
AVOptions.
Multithreading support functions.
static AVFrame * frame
static void free_buffers(AVCodecContext *avctx)
Definition: pixlet.c:97
#define height
uint8_t * data
Definition: avcodec.h:1657
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:199
bitstream reader API header.
static void filterfn(int16_t *dest, int16_t *tmp, unsigned size, int64_t scale)
Definition: pixlet.c:369
ptrdiff_t size
Definition: opengl_enc.c:101
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:896
#define FFALIGN(x, a)
Definition: macros.h:48
#define av_log(a,...)
unsigned x
Definition: pixlet.c:43
Definition: cfhd.h:43
#define U(x)
Definition: vp56_arith.h:37
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static int decode_plane(AVCodecContext *avctx, int plane, AVPacket *avpkt, AVFrame *frame)
Definition: pixlet.c:504
#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:179
static struct @253 state
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: frame.h:423
static av_always_inline unsigned int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:154
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1827
static void postprocess_luma(AVFrame *frame, int w, int h, int depth)
Definition: pixlet.c:458
GLsizei GLsizei * length
Definition: opengl_enc.c:115
const char * name
Name of the codec implementation.
Definition: avcodec.h:3688
int levels
Definition: pixlet.c:52
#define FFMAX(a, b)
Definition: common.h:94
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:1057
int depth
Definition: v4l.c:62
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:218
static int read_highpass(AVCodecContext *avctx, uint8_t *ptr, int plane, AVFrame *frame)
Definition: pixlet.c:311
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:261
#define FFMIN(a, b)
Definition: common.h:96
#define ff_clz
Definition: intmath.h:142
#define width
int width
picture width / height.
Definition: avcodec.h:1919
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:109
int32_t
AVFormatContext * ctx
Definition: movenc.c:48
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
Definition: get_bits.h:296
int depth
Definition: pixlet.c:53
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
static int init_decoder(AVCodecContext *avctx)
Definition: pixlet.c:62
the normal 2^n-1 "JPEG" YUV ranges
Definition: pixfmt.h:476
static const float pred[4]
Definition: siprdata.h:259
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:362
static av_always_inline int bytestream2_tell(GetByteContext *g)
Definition: bytestream.h:188
int64_t scaling[4][2][NB_LEVELS]
Definition: pixlet.c:58
static av_cold int pixlet_init(AVCodecContext *avctx)
Definition: pixlet.c:115
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:218
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:456
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:1732
#define NB_LEVELS
Definition: pixlet.c:35
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:313
Describe the class of an AVClass context structure.
Definition: log.h:67
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:306
static void postprocess_chroma(AVFrame *frame, int w, int h, int depth)
Definition: pixlet.c:480
GetByteContext gb
Definition: pixlet.c:49
#define u(width,...)
static av_const int sign_extend(int val, unsigned bits)
Definition: mathops.h:130
static int pixlet_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: pixlet.c:571
static int read_high_coeffs(AVCodecContext *avctx, uint8_t *src, int16_t *dst, int size, int c, int a, int d, int width, ptrdiff_t stride)
Definition: pixlet.c:196
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:201
unsigned y
Definition: pixlet.c:43
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
common internal api header.
static int get_unary(GetBitContext *gb, int stop, int len)
Get unary code of limited length.
Definition: unary.h:33
static double c[64]
unsigned size
Definition: pixlet.c:42
unsigned width
Definition: pixlet.c:41
void * priv_data
Definition: avcodec.h:1774
GetBitContext gbit
Definition: pixlet.c:50
#define V
Definition: pixlet.c:38
#define H
Definition: pixlet.c:37
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:256
int height
Definition: cfhd.h:50
int16_t * prediction
Definition: pixlet.c:57
static const uint8_t * align_get_bits(GetBitContext *s)
Definition: get_bits.h:464
#define av_freep(p)
#define av_malloc_array(a, b)
#define stride
static void lowpass_prediction(int16_t *dst, int16_t *pred, int width, int height, ptrdiff_t stride)
Definition: pixlet.c:350
static av_cold int pixlet_close(AVCodecContext *avctx)
Definition: pixlet.c:106
This structure stores compressed data.
Definition: avcodec.h:1634
AVCodec ff_pixlet_decoder
Definition: pixlet.c:676
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:994
static av_always_inline av_const unsigned av_clip_uintp2_c(int a, int p)
Clip a signed integer to an unsigned power of two range.
Definition: common.h:229
static uint8_t tmp[11]
Definition: aes_ctr.c:26