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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 "internal.h"
32 #include "thread.h"
33 #include "unary.h"
34 
35 #define NB_LEVELS 4
36 
37 #define PIXLET_MAGIC 0xDEADBEEF
38 
39 #define H 0
40 #define V 1
41 
42 typedef struct SubBand {
43  unsigned width, height;
44  unsigned size;
45  unsigned x, y;
46 } SubBand;
47 
48 typedef struct PixletContext {
49  AVClass *class;
50 
53 
54  int levels;
55  int depth;
56  int w, h;
57 
58  int16_t *filter[2];
59  int16_t *prediction;
60  int64_t scaling[4][2][NB_LEVELS];
61  SubBand band[4][NB_LEVELS * 3 + 1];
63 
65 {
68  return 0;
69 }
70 
71 static void free_buffers(AVCodecContext *avctx)
72 {
73  PixletContext *ctx = avctx->priv_data;
74 
75  av_freep(&ctx->filter[0]);
76  av_freep(&ctx->filter[1]);
77  av_freep(&ctx->prediction);
78 }
79 
81 {
82  PixletContext *ctx = avctx->priv_data;
83  free_buffers(avctx);
84  ctx->w = 0;
85  ctx->h = 0;
86  return 0;
87 }
88 
89 static int init_decoder(AVCodecContext *avctx)
90 {
91  PixletContext *ctx = avctx->priv_data;
92  int i, plane;
93 
94  ctx->filter[0] = av_malloc_array(ctx->h, sizeof(int16_t));
95  ctx->filter[1] = av_malloc_array(FFMAX(ctx->h, ctx->w) + 16, sizeof(int16_t));
96  ctx->prediction = av_malloc_array((ctx->w >> NB_LEVELS), sizeof(int16_t));
97  if (!ctx->filter[0] || !ctx->filter[1] || !ctx->prediction)
98  return AVERROR(ENOMEM);
99 
100  for (plane = 0; plane < 3; plane++) {
101  unsigned shift = plane > 0;
102  unsigned w = ctx->w >> shift;
103  unsigned h = ctx->h >> shift;
104 
105  ctx->band[plane][0].width = w >> NB_LEVELS;
106  ctx->band[plane][0].height = h >> NB_LEVELS;
107  ctx->band[plane][0].size = (w >> NB_LEVELS) * (h >> NB_LEVELS);
108 
109  for (i = 0; i < NB_LEVELS * 3; i++) {
110  unsigned scale = ctx->levels - (i / 3);
111 
112  ctx->band[plane][i + 1].width = w >> scale;
113  ctx->band[plane][i + 1].height = h >> scale;
114  ctx->band[plane][i + 1].size = (w >> scale) * (h >> scale);
115 
116  ctx->band[plane][i + 1].x = (w >> scale) * (((i + 1) % 3) != 2);
117  ctx->band[plane][i + 1].y = (h >> scale) * (((i + 1) % 3) != 1);
118  }
119  }
120 
121  return 0;
122 }
123 
124 static int read_low_coeffs(AVCodecContext *avctx, int16_t *dst, int size,
125  int width, ptrdiff_t stride)
126 {
127  PixletContext *ctx = avctx->priv_data;
128  GetBitContext *bc = &ctx->bc;
129  unsigned cnt1, nbits, k, j = 0, i = 0;
130  int64_t value, state = 3;
131  int rlen, escape, flag = 0;
132 
133  while (i < size) {
134  nbits = FFMIN(ff_clz((state >> 8) + 3) ^ 0x1F, 14);
135 
136  cnt1 = get_unary(bc, 0, 8);
137  if (cnt1 < 8) {
138  value = show_bits(bc, nbits);
139  if (value <= 1) {
140  skip_bits(bc, nbits - 1);
141  escape = ((1 << nbits) - 1) * cnt1;
142  } else {
143  skip_bits(bc, nbits);
144  escape = value + ((1 << nbits) - 1) * cnt1 - 1;
145  }
146  } else {
147  escape = get_bits(bc, 16);
148  }
149 
150  value = -((escape + flag) & 1) | 1;
151  dst[j++] = value * ((escape + flag + 1) >> 1);
152  i++;
153  if (j == width) {
154  j = 0;
155  dst += stride;
156  }
157  state = 120 * (escape + flag) + state - (120 * state >> 8);
158  flag = 0;
159 
160  if (state * 4ULL > 0xFF || i >= size)
161  continue;
162 
163  nbits = ((state + 8) >> 5) + (state ? ff_clz(state) : 32) - 24;
164  escape = av_mod_uintp2(16383, nbits);
165  cnt1 = get_unary(bc, 0, 8);
166  if (cnt1 > 7) {
167  rlen = get_bits(bc, 16);
168  } else {
169  value = show_bits(bc, nbits);
170  if (value > 1) {
171  skip_bits(bc, nbits);
172  rlen = value + escape * cnt1 - 1;
173  } else {
174  skip_bits(bc, nbits - 1);
175  rlen = escape * cnt1;
176  }
177  }
178 
179  if (rlen > size - i)
180  return AVERROR_INVALIDDATA;
181  i += rlen;
182 
183  for (k = 0; k < rlen; k++) {
184  dst[j++] = 0;
185  if (j == width) {
186  j = 0;
187  dst += stride;
188  }
189  }
190 
191  state = 0;
192  flag = rlen < 0xFFFF ? 1 : 0;
193  }
194 
195  align_get_bits(bc);
196  return get_bits_count(bc) >> 3;
197 }
198 
199 static int read_high_coeffs(AVCodecContext *avctx, uint8_t *src, int16_t *dst,
200  int size, int c, int a, int d,
201  int width, ptrdiff_t stride)
202 {
203  PixletContext *ctx = avctx->priv_data;
204  GetBitContext *bc = &ctx->bc;
205  unsigned cnt1, shbits, rlen, nbits, length, i = 0, j = 0, k;
206  int ret, escape, pfx, value, yflag, xflag, flag = 0;
207  int64_t state = 3, tmp;
208 
209  ret = init_get_bits8(bc, src, bytestream2_get_bytes_left(&ctx->gb));
210  if (ret < 0)
211  return ret;
212 
213  if (a ^ (a >> 31)) {
214  nbits = 33 - ff_clz(a ^ (a >> 31));
215  if (nbits > 16)
216  return AVERROR_INVALIDDATA;
217  } else {
218  nbits = 1;
219  }
220 
221  length = 25 - nbits;
222 
223  while (i < size) {
224  if (state >> 8 != -3)
225  value = ff_clz((state >> 8) + 3) ^ 0x1F;
226  else
227  value = -1;
228 
229  cnt1 = get_unary(bc, 0, length);
230  if (cnt1 >= length) {
231  cnt1 = get_bits(bc, nbits);
232  } else {
233  pfx = 14 + ((((uint64_t)(value - 14)) >> 32) & (value - 14));
234  if (pfx < 1 || pfx > 25)
235  return AVERROR_INVALIDDATA;
236  cnt1 *= (1 << pfx) - 1;
237  shbits = show_bits(bc, pfx);
238  if (shbits <= 1) {
239  skip_bits(bc, pfx - 1);
240  } else {
241  skip_bits(bc, pfx);
242  cnt1 += shbits - 1;
243  }
244  }
245 
246  xflag = flag + cnt1;
247  yflag = xflag;
248 
249  if (flag + cnt1 == 0) {
250  value = 0;
251  } else {
252  xflag &= 1u;
253  tmp = (int64_t)c * ((yflag + 1) >> 1) + (c >> 1);
254  value = xflag + (tmp ^ -xflag);
255  }
256 
257  i++;
258  dst[j++] = value;
259  if (j == width) {
260  j = 0;
261  dst += stride;
262  }
263  state += (int64_t)d * (uint64_t)yflag - ((int64_t)(d * (uint64_t)state) >> 8);
264 
265  flag = 0;
266 
267  if ((uint64_t)state > 0xFF / 4 || i >= size)
268  continue;
269 
270  pfx = ((state + 8) >> 5) + (state ? ff_clz(state) : 32) - 24;
271  escape = av_mod_uintp2(16383, pfx);
272  cnt1 = get_unary(bc, 0, 8);
273  if (cnt1 < 8) {
274  if (pfx < 1 || pfx > 25)
275  return AVERROR_INVALIDDATA;
276 
277  value = show_bits(bc, pfx);
278  if (value > 1) {
279  skip_bits(bc, pfx);
280  rlen = value + escape * cnt1 - 1;
281  } else {
282  skip_bits(bc, pfx - 1);
283  rlen = escape * cnt1;
284  }
285  } else {
286  if (get_bits1(bc))
287  value = get_bits(bc, 16);
288  else
289  value = get_bits(bc, 8);
290 
291  rlen = value + 8 * escape;
292  }
293 
294  if (rlen > 0xFFFF || i + rlen > size)
295  return AVERROR_INVALIDDATA;
296  i += rlen;
297 
298  for (k = 0; k < rlen; k++) {
299  dst[j++] = 0;
300  if (j == width) {
301  j = 0;
302  dst += stride;
303  }
304  }
305 
306  state = 0;
307  flag = rlen < 0xFFFF ? 1 : 0;
308  }
309 
310  align_get_bits(bc);
311  return get_bits_count(bc) >> 3;
312 }
313 
314 static int read_highpass(AVCodecContext *avctx, uint8_t *ptr,
315  int plane, AVFrame *frame)
316 {
317  PixletContext *ctx = avctx->priv_data;
318  ptrdiff_t stride = frame->linesize[plane] / 2;
319  int i, ret;
320 
321  for (i = 0; i < ctx->levels * 3; i++) {
322  int32_t a = bytestream2_get_be32(&ctx->gb);
323  int32_t b = bytestream2_get_be32(&ctx->gb);
324  int32_t c = bytestream2_get_be32(&ctx->gb);
325  int32_t d = bytestream2_get_be32(&ctx->gb);
326  int16_t *dest = (int16_t *)frame->data[plane] +
327  ctx->band[plane][i + 1].x +
328  ctx->band[plane][i + 1].y * stride;
329  unsigned size = ctx->band[plane][i + 1].size;
330  uint32_t magic = bytestream2_get_be32(&ctx->gb);
331 
332  if (magic != PIXLET_MAGIC) {
333  av_log(avctx, AV_LOG_ERROR,
334  "wrong magic number: 0x%08"PRIX32" for plane %d, band %d\n",
335  magic, plane, i);
336  return AVERROR_INVALIDDATA;
337  }
338 
339  if (a == INT32_MIN)
340  return AVERROR_INVALIDDATA;
341 
342  ret = read_high_coeffs(avctx, ptr + bytestream2_tell(&ctx->gb), dest, size,
343  c, (b >= FFABS(a)) ? b : a, d,
344  ctx->band[plane][i + 1].width, stride);
345  if (ret < 0) {
346  av_log(avctx, AV_LOG_ERROR,
347  "error in highpass coefficients for plane %d, band %d\n",
348  plane, i);
349  return ret;
350  }
351  bytestream2_skip(&ctx->gb, ret);
352  }
353 
354  return 0;
355 }
356 
357 static void lowpass_prediction(int16_t *dst, int16_t *pred,
358  int width, int height, ptrdiff_t stride)
359 {
360  int16_t val;
361  int i, j;
362 
363  memset(pred, 0, width * sizeof(*pred));
364 
365  for (i = 0; i < height; i++) {
366  val = pred[0] + dst[0];
367  dst[0] = pred[0] = val;
368  for (j = 1; j < width; j++) {
369  val = pred[j] + dst[j];
370  dst[j] = pred[j] = val;
371  dst[j] += dst[j-1];
372  }
373  dst += stride;
374  }
375 }
376 
377 static void filterfn(int16_t *dest, int16_t *tmp, unsigned size, int64_t scale)
378 {
379  int16_t *low, *high, *ll, *lh, *hl, *hh;
380  int hsize, i, j;
381  int64_t value;
382 
383  hsize = size >> 1;
384  low = tmp + 4;
385  high = &low[hsize + 8];
386 
387  memcpy(low, dest, size);
388  memcpy(high, dest + hsize, size);
389 
390  ll = &low[hsize];
391  lh = &low[hsize];
392  hl = &high[hsize];
393  hh = hl;
394  for (i = 4, j = 2; i; i--, j++, ll--, hh++, lh++, hl--) {
395  low[i - 5] = low[j - 1];
396  lh[0] = ll[-1];
397  high[i - 5] = high[j - 2];
398  hh[0] = hl[-2];
399  }
400 
401  for (i = 0; i < hsize; i++) {
402  value = (int64_t) low [i + 1] * -INT64_C(325392907) +
403  (int64_t) low [i + 0] * INT64_C(3687786320) +
404  (int64_t) low [i - 1] * -INT64_C(325392907) +
405  (int64_t) high[i + 0] * INT64_C(1518500249) +
406  (int64_t) high[i - 1] * INT64_C(1518500249);
407  dest[i * 2] = av_clip_int16(((value >> 32) * scale) >> 32);
408  }
409 
410  for (i = 0; i < hsize; i++) {
411  value = (int64_t) low [i + 2] * -INT64_C(65078576) +
412  (int64_t) low [i + 1] * INT64_C(1583578880) +
413  (int64_t) low [i + 0] * INT64_C(1583578880) +
414  (int64_t) low [i - 1] * -INT64_C(65078576) +
415  (int64_t) high[i + 1] * INT64_C(303700064) +
416  (int64_t) high[i + 0] * -INT64_C(3644400640) +
417  (int64_t) high[i - 1] * INT64_C(303700064);
418  dest[i * 2 + 1] = av_clip_int16(((value >> 32) * scale) >> 32);
419  }
420 }
421 
422 static void reconstruction(AVCodecContext *avctx, int16_t *dest,
423  unsigned width, unsigned height, ptrdiff_t stride,
424  int64_t *scaling_h, int64_t *scaling_v)
425 {
426  PixletContext *ctx = avctx->priv_data;
427  unsigned scaled_width, scaled_height;
428  int16_t *ptr, *tmp;
429  int i, j, k;
430 
431  scaled_width = width >> NB_LEVELS;
432  scaled_height = height >> NB_LEVELS;
433  tmp = ctx->filter[0];
434 
435  for (i = 0; i < NB_LEVELS; i++) {
436  int64_t scale_v = scaling_v[i];
437  int64_t scale_h = scaling_h[i];
438  scaled_width <<= 1;
439  scaled_height <<= 1;
440 
441  ptr = dest;
442  for (j = 0; j < scaled_height; j++) {
443  filterfn(ptr, ctx->filter[1], scaled_width, scale_v);
444  ptr += stride;
445  }
446 
447  for (j = 0; j < scaled_width; j++) {
448  ptr = dest + j;
449  for (k = 0; k < scaled_height; k++) {
450  tmp[k] = *ptr;
451  ptr += stride;
452  }
453 
454  filterfn(tmp, ctx->filter[1], scaled_height, scale_h);
455 
456  ptr = dest + j;
457  for (k = 0; k < scaled_height; k++) {
458  *ptr = tmp[k];
459  ptr += stride;
460  }
461  }
462  }
463 }
464 
465 static void postprocess_luma(AVFrame *frame, int w, int h, int depth)
466 {
467  uint16_t *dsty = (uint16_t *)frame->data[0];
468  int16_t *srcy = (int16_t *)frame->data[0];
469  ptrdiff_t stridey = frame->linesize[0] / 2;
470  int i, j;
471 
472  for (j = 0; j < h; j++) {
473  for (i = 0; i < w; i++) {
474  if (srcy[i] <= 0)
475  dsty[i] = 0;
476  else if (srcy[i] > ((1 << depth) - 1))
477  dsty[i] = 65535;
478  else
479  dsty[i] = ((int64_t) srcy[i] * srcy[i] * 65535) /
480  ((1 << depth) - 1) / ((1 << depth) - 1);
481  }
482  dsty += stridey;
483  srcy += stridey;
484  }
485 }
486 
487 static void postprocess_chroma(AVFrame *frame, int w, int h, int depth)
488 {
489  uint16_t *dstu = (uint16_t *)frame->data[1];
490  uint16_t *dstv = (uint16_t *)frame->data[2];
491  int16_t *srcu = (int16_t *)frame->data[1];
492  int16_t *srcv = (int16_t *)frame->data[2];
493  ptrdiff_t strideu = frame->linesize[1] / 2;
494  ptrdiff_t stridev = frame->linesize[2] / 2;
495  const unsigned add = 1 << (depth - 1);
496  const unsigned shift = 16 - depth;
497  int i, j;
498 
499  for (j = 0; j < h; j++) {
500  for (i = 0; i < w; i++) {
501  dstu[i] = av_clip_uintp2_c(add + srcu[i], depth) << shift;
502  dstv[i] = av_clip_uintp2_c(add + srcv[i], depth) << shift;
503  }
504  dstu += strideu;
505  dstv += stridev;
506  srcu += strideu;
507  srcv += stridev;
508  }
509 }
510 
511 static int decode_plane(AVCodecContext *avctx, int plane,
512  AVPacket *avpkt, AVFrame *frame)
513 {
514  PixletContext *ctx = avctx->priv_data;
515  ptrdiff_t stride = frame->linesize[plane] / 2;
516  unsigned shift = plane > 0;
517  int16_t *dst;
518  int i, ret;
519 
520  for (i = ctx->levels - 1; i >= 0; i--) {
521  int32_t h = sign_extend(bytestream2_get_be32(&ctx->gb), 32);
522  int32_t v = sign_extend(bytestream2_get_be32(&ctx->gb), 32);
523 
524  if (!h || !v)
525  return AVERROR_INVALIDDATA;
526 
527  ctx->scaling[plane][H][i] = (1000000ULL << 32) / h;
528  ctx->scaling[plane][V][i] = (1000000ULL << 32) / v;
529  }
530 
531  bytestream2_skip(&ctx->gb, 4);
532 
533  dst = (int16_t *)frame->data[plane];
534  dst[0] = sign_extend(bytestream2_get_be16(&ctx->gb), 16);
535 
536  ret = init_get_bits8(&ctx->bc, avpkt->data + bytestream2_tell(&ctx->gb),
538  if (ret < 0)
539  return ret;
540 
541  ret = read_low_coeffs(avctx, dst + 1, ctx->band[plane][0].width - 1,
542  ctx->band[plane][0].width - 1, 0);
543  if (ret < 0) {
544  av_log(avctx, AV_LOG_ERROR,
545  "error in lowpass coefficients for plane %d, top row\n", plane);
546  return ret;
547  }
548 
549  ret = read_low_coeffs(avctx, dst + stride,
550  ctx->band[plane][0].height - 1, 1, stride);
551  if (ret < 0) {
552  av_log(avctx, AV_LOG_ERROR,
553  "error in lowpass coefficients for plane %d, left column\n",
554  plane);
555  return ret;
556  }
557 
558  ret = read_low_coeffs(avctx, dst + stride + 1,
559  (ctx->band[plane][0].width - 1) * (ctx->band[plane][0].height - 1),
560  ctx->band[plane][0].width - 1, stride);
561  if (ret < 0) {
562  av_log(avctx, AV_LOG_ERROR,
563  "error in lowpass coefficients for plane %d, rest\n", plane);
564  return ret;
565  }
566 
567  bytestream2_skip(&ctx->gb, ret);
568  if (bytestream2_get_bytes_left(&ctx->gb) <= 0) {
569  av_log(avctx, AV_LOG_ERROR, "no bytes left\n");
570  return AVERROR_INVALIDDATA;
571  }
572 
573  ret = read_highpass(avctx, avpkt->data, plane, frame);
574  if (ret < 0)
575  return ret;
576 
577  lowpass_prediction(dst, ctx->prediction, ctx->band[plane][0].width,
578  ctx->band[plane][0].height, stride);
579 
580  reconstruction(avctx, (int16_t *)frame->data[plane], ctx->w >> shift,
581  ctx->h >> shift, stride, ctx->scaling[plane][H],
582  ctx->scaling[plane][V]);
583 
584  return 0;
585 }
586 
587 static int pixlet_decode_frame(AVCodecContext *avctx, void *data,
588  int *got_frame, AVPacket *avpkt)
589 {
590  PixletContext *ctx = avctx->priv_data;
591  int i, w, h, width, height, ret, version;
592  AVFrame *p = data;
593  ThreadFrame frame = { .f = data };
594  uint32_t pktsize;
595 
596  bytestream2_init(&ctx->gb, avpkt->data, avpkt->size);
597 
598  pktsize = bytestream2_get_be32(&ctx->gb);
599  if (pktsize <= 44 || pktsize - 4 > bytestream2_get_bytes_left(&ctx->gb)) {
600  av_log(avctx, AV_LOG_ERROR, "Invalid packet size %"PRIu32"\n", pktsize);
601  return AVERROR_INVALIDDATA;
602  }
603 
604  version = bytestream2_get_le32(&ctx->gb);
605  if (version != 1)
606  avpriv_request_sample(avctx, "Version %d", version);
607 
608  bytestream2_skip(&ctx->gb, 4);
609  if (bytestream2_get_be32(&ctx->gb) != 1)
610  return AVERROR_INVALIDDATA;
611  bytestream2_skip(&ctx->gb, 4);
612 
613  width = bytestream2_get_be32(&ctx->gb);
614  height = bytestream2_get_be32(&ctx->gb);
615 
616  if ( width > INT_MAX - (1U << (NB_LEVELS + 1))
617  || height > INT_MAX - (1U << (NB_LEVELS + 1)))
618  return AVERROR_INVALIDDATA;
619 
620  w = FFALIGN(width, 1 << (NB_LEVELS + 1));
621  h = FFALIGN(height, 1 << (NB_LEVELS + 1));
622 
623  ctx->levels = bytestream2_get_be32(&ctx->gb);
624  if (ctx->levels != NB_LEVELS)
625  return AVERROR_INVALIDDATA;
626  ctx->depth = bytestream2_get_be32(&ctx->gb);
627  if (ctx->depth < 8 || ctx->depth > 15) {
628  avpriv_request_sample(avctx, "Depth %d", ctx->depth);
629  return AVERROR_INVALIDDATA;
630  }
631 
632  ret = ff_set_dimensions(avctx, w, h);
633  if (ret < 0)
634  return ret;
635  avctx->width = width;
636  avctx->height = height;
637 
638  if (ctx->w != w || ctx->h != h) {
639  free_buffers(avctx);
640  ctx->w = w;
641  ctx->h = h;
642 
643  ret = init_decoder(avctx);
644  if (ret < 0) {
645  free_buffers(avctx);
646  ctx->w = 0;
647  ctx->h = 0;
648  return ret;
649  }
650  }
651 
652  bytestream2_skip(&ctx->gb, 8);
653 
655  p->key_frame = 1;
657 
658  ret = ff_thread_get_buffer(avctx, &frame, 0);
659  if (ret < 0)
660  return ret;
661 
662  for (i = 0; i < 3; i++) {
663  ret = decode_plane(avctx, i, avpkt, frame.f);
664  if (ret < 0)
665  return ret;
666  if (avctx->flags & AV_CODEC_FLAG_GRAY)
667  break;
668  }
669 
670  postprocess_luma(frame.f, ctx->w, ctx->h, ctx->depth);
671  postprocess_chroma(frame.f, ctx->w >> 1, ctx->h >> 1, ctx->depth);
672 
673  *got_frame = 1;
674 
675  return pktsize;
676 }
677 
678 #if HAVE_THREADS
679 static int pixlet_init_thread_copy(AVCodecContext *avctx)
680 {
681  PixletContext *ctx = avctx->priv_data;
682 
683  ctx->filter[0] = NULL;
684  ctx->filter[1] = NULL;
685  ctx->prediction = NULL;
686  ctx->w = 0;
687  ctx->h = 0;
688 
689  return 0;
690 }
691 #endif /* HAVE_THREADS */
692 
694  .name = "pixlet",
695  .long_name = NULL_IF_CONFIG_SMALL("Apple Pixlet"),
696  .type = AVMEDIA_TYPE_VIDEO,
697  .id = AV_CODEC_ID_PIXLET,
698  .init = pixlet_init,
699  .init_thread_copy = ONLY_IF_THREADS_ENABLED(pixlet_init_thread_copy),
700  .close = pixlet_close,
701  .decode = pixlet_decode_frame,
702  .priv_data_size = sizeof(PixletContext),
703  .capabilities = AV_CODEC_CAP_DR1 |
705  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
707 };
#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:61
#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:58
static int shift(int a, int b)
Definition: sonic.c:82
#define flag(name)
Definition: cbs_h2645.c:345
This structure describes decoded (raw) audio or video data.
Definition: frame.h:201
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:196
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: avcodec.h:2132
int size
Definition: avcodec.h:1415
const char * b
Definition: vf_curves.c:113
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1711
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:124
#define src
Definition: vp8dsp.c:254
AVCodec.
Definition: avcodec.h:3365
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 struct @281 state
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:343
static AVFrame * frame
static void free_buffers(AVCodecContext *avctx)
Definition: pixlet.c:71
#define height
uint8_t * data
Definition: avcodec.h:1414
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:377
ptrdiff_t size
Definition: opengl_enc.c:101
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:858
#define FFALIGN(x, a)
Definition: macros.h:48
#define av_log(a,...)
unsigned x
Definition: pixlet.c:45
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:511
#define AVERROR(e)
Definition: error.h:43
static av_always_inline void bytestream2_skip(GetByteContext *g, unsigned int size)
Definition: bytestream.h:164
GetBitContext bc
Definition: pixlet.c:52
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: frame.h:446
static av_always_inline unsigned int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:154
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1582
uint16_t width
Definition: gdv.c:47
static void postprocess_luma(AVFrame *frame, int w, int h, int depth)
Definition: pixlet.c:465
GLsizei GLsizei * length
Definition: opengl_enc.c:115
const char * name
Name of the codec implementation.
Definition: avcodec.h:3372
int levels
Definition: pixlet.c:54
#define FFMAX(a, b)
Definition: common.h:94
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:1012
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
Definition: internal.h:225
static int read_highpass(AVCodecContext *avctx, uint8_t *ptr, int plane, AVFrame *frame)
Definition: pixlet.c:314
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:284
#define FFMIN(a, b)
Definition: common.h:96
#define ff_clz
Definition: intmath.h:142
int width
picture width / height.
Definition: avcodec.h:1674
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:55
#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:89
the normal 2^n-1 "JPEG" YUV ranges
Definition: pixfmt.h:499
static const float pred[4]
Definition: siprdata.h:259
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:379
static av_always_inline int bytestream2_tell(GetByteContext *g)
Definition: bytestream.h:188
int64_t scaling[4][2][NB_LEVELS]
Definition: pixlet.c:60
static av_cold int pixlet_init(AVCodecContext *avctx)
Definition: pixlet.c:64
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
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:1502
#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:487
GetByteContext gb
Definition: pixlet.c:51
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:587
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:199
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:215
unsigned y
Definition: pixlet.c:45
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:44
unsigned width
Definition: pixlet.c:43
void * priv_data
Definition: avcodec.h:1529
#define V
Definition: pixlet.c:40
#define H
Definition: pixlet.c:39
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:279
int height
Definition: cfhd.h:50
int16_t * prediction
Definition: pixlet.c:59
static const uint8_t * align_get_bits(GetBitContext *s)
Definition: get_bits.h:464
static void reconstruction(AVCodecContext *avctx, int16_t *dest, unsigned width, unsigned height, ptrdiff_t stride, int64_t *scaling_h, int64_t *scaling_v)
Definition: pixlet.c:422
#define av_freep(p)
#define PIXLET_MAGIC
Definition: pixlet.c:37
#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:357
static av_cold int pixlet_close(AVCodecContext *avctx)
Definition: pixlet.c:80
This structure stores compressed data.
Definition: avcodec.h:1391
AVCodec ff_pixlet_decoder
Definition: pixlet.c:693
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:956
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