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cfhd.c
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1 /*
2  * Copyright (c) 2015-2016 Kieran Kunhya <kieran@kunhya.com>
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 /**
22  * @file
23  * CFHD Video Decoder
24  */
25 
26 #include "libavutil/buffer.h"
27 #include "libavutil/common.h"
28 #include "libavutil/intreadwrite.h"
29 #include "libavutil/imgutils.h"
30 #include "libavutil/opt.h"
31 
32 #include "avcodec.h"
33 #include "internal.h"
34 #include "bytestream.h"
35 #include "thread.h"
36 #include "cfhd.h"
37 
38 #define SUBBAND_COUNT 10
39 
41 {
42  CFHDContext *s = avctx->priv_data;
43 
44  avctx->bits_per_raw_sample = 10;
45  s->avctx = avctx;
46 
47  return ff_cfhd_init_vlcs(s);
48 }
49 
51 {
52  s->subband_num = 0;
53  s->level = 0;
54  s->subband_num_actual = 0;
55 }
56 
58 {
59  s->coded_width = 0;
60  s->coded_height = 0;
61  s->bpc = 10;
62  s->channel_cnt = 4;
63  s->subband_cnt = 10;
64  s->channel_num = 0;
65  s->lowpass_precision = 16;
66  s->quantisation = 1;
67  s->wavelet_depth = 3;
68  s->pshift = 1;
69  s->codebook = 0;
71 }
72 
73 /* TODO: merge with VLC tables or use LUT */
74 static inline int dequant_and_decompand(int level, int quantisation)
75 {
76  int64_t abslevel = abs(level);
77  return (abslevel + ((768 * abslevel * abslevel * abslevel) / (255 * 255 * 255))) * FFSIGN(level) * quantisation;
78 }
79 
80 static inline void filter(int16_t *output, ptrdiff_t out_stride, int16_t *low, ptrdiff_t low_stride,
81  int16_t *high, ptrdiff_t high_stride, int len, uint8_t clip)
82 {
83  int16_t tmp;
84 
85  int i;
86  for (i = 0; i < len; i++) {
87  if (i == 0) {
88  tmp = (11*low[0*low_stride] - 4*low[1*low_stride] + low[2*low_stride] + 4) >> 3;
89  output[(2*i+0)*out_stride] = (tmp + high[0*high_stride]) >> 1;
90  if (clip)
91  output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
92 
93  tmp = ( 5*low[0*low_stride] + 4*low[1*low_stride] - low[2*low_stride] + 4) >> 3;
94  output[(2*i+1)*out_stride] = (tmp - high[0*high_stride]) >> 1;
95  if (clip)
96  output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
97  } else if (i == len-1) {
98  tmp = ( 5*low[i*low_stride] + 4*low[(i-1)*low_stride] - low[(i-2)*low_stride] + 4) >> 3;
99  output[(2*i+0)*out_stride] = (tmp + high[i*high_stride]) >> 1;
100  if (clip)
101  output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
102 
103  tmp = (11*low[i*low_stride] - 4*low[(i-1)*low_stride] + low[(i-2)*low_stride] + 4) >> 3;
104  output[(2*i+1)*out_stride] = (tmp - high[i*high_stride]) >> 1;
105  if (clip)
106  output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
107  } else {
108  tmp = (low[(i-1)*low_stride] - low[(i+1)*low_stride] + 4) >> 3;
109  output[(2*i+0)*out_stride] = (tmp + low[i*low_stride] + high[i*high_stride]) >> 1;
110  if (clip)
111  output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
112 
113  tmp = (low[(i+1)*low_stride] - low[(i-1)*low_stride] + 4) >> 3;
114  output[(2*i+1)*out_stride] = (tmp + low[i*low_stride] - high[i*high_stride]) >> 1;
115  if (clip)
116  output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
117  }
118  }
119 }
120 
121 static void horiz_filter(int16_t *output, int16_t *low, int16_t *high, int width)
122 {
123  filter(output, 1, low, 1, high, 1, width, 0);
124 }
125 
126 static void horiz_filter_clip(int16_t *output, int16_t *low, int16_t *high, int width, uint8_t clip)
127 {
128  filter(output, 1, low, 1, high, 1, width, clip);
129 }
130 
131 static void vert_filter(int16_t *output, int out_stride, int16_t *low, int low_stride,
132  int16_t *high, int high_stride, int len)
133 {
134  filter(output, out_stride, low, low_stride, high, high_stride, len, 0);
135 }
136 
137 static void free_buffers(AVCodecContext *avctx)
138 {
139  CFHDContext *s = avctx->priv_data;
140  int i, j;
141 
142  for (i = 0; i < 4; i++) {
143  av_freep(&s->plane[i].idwt_buf);
144  av_freep(&s->plane[i].idwt_tmp);
145 
146  for (j = 0; j < 9; j++)
147  s->plane[i].subband[j] = NULL;
148 
149  for (j = 0; j < 8; j++)
150  s->plane[i].l_h[j] = NULL;
151  }
152  s->a_height = 0;
153  s->a_width = 0;
154 }
155 
156 static int alloc_buffers(AVCodecContext *avctx)
157 {
158  CFHDContext *s = avctx->priv_data;
159  int i, j, k, ret, planes;
160 
161  if ((ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height)) < 0)
162  return ret;
163  avctx->pix_fmt = s->coded_format;
164 
166  planes = av_pix_fmt_count_planes(avctx->pix_fmt);
167 
168  for (i = 0; i < planes; i++) {
169  int width = i ? avctx->width >> s->chroma_x_shift : avctx->width;
170  int height = i ? avctx->height >> s->chroma_y_shift : avctx->height;
171  int stride = FFALIGN(width / 8, 8) * 8;
172  int w8, h8, w4, h4, w2, h2;
173  height = FFALIGN(height / 8, 2) * 8;
174  s->plane[i].width = width;
175  s->plane[i].height = height;
176  s->plane[i].stride = stride;
177 
178  w8 = FFALIGN(s->plane[i].width / 8, 8);
179  h8 = FFALIGN(s->plane[i].height / 8, 2);
180  w4 = w8 * 2;
181  h4 = h8 * 2;
182  w2 = w4 * 2;
183  h2 = h4 * 2;
184 
185  s->plane[i].idwt_buf = av_mallocz_array(height * stride, sizeof(*s->plane[i].idwt_buf));
186  s->plane[i].idwt_tmp = av_malloc_array(height * stride, sizeof(*s->plane[i].idwt_tmp));
187  if (!s->plane[i].idwt_buf || !s->plane[i].idwt_tmp) {
188  return AVERROR(ENOMEM);
189  }
190 
191  s->plane[i].subband[0] = s->plane[i].idwt_buf;
192  s->plane[i].subband[1] = s->plane[i].idwt_buf + 2 * w8 * h8;
193  s->plane[i].subband[2] = s->plane[i].idwt_buf + 1 * w8 * h8;
194  s->plane[i].subband[3] = s->plane[i].idwt_buf + 3 * w8 * h8;
195  s->plane[i].subband[4] = s->plane[i].idwt_buf + 2 * w4 * h4;
196  s->plane[i].subband[5] = s->plane[i].idwt_buf + 1 * w4 * h4;
197  s->plane[i].subband[6] = s->plane[i].idwt_buf + 3 * w4 * h4;
198  s->plane[i].subband[7] = s->plane[i].idwt_buf + 2 * w2 * h2;
199  s->plane[i].subband[8] = s->plane[i].idwt_buf + 1 * w2 * h2;
200  s->plane[i].subband[9] = s->plane[i].idwt_buf + 3 * w2 * h2;
201 
202  for (j = 0; j < DWT_LEVELS; j++) {
203  for(k = 0; k < 4; k++) {
204  s->plane[i].band[j][k].a_width = w8 << j;
205  s->plane[i].band[j][k].a_height = h8 << j;
206  }
207  }
208 
209  /* ll2 and ll1 commented out because they are done in-place */
210  s->plane[i].l_h[0] = s->plane[i].idwt_tmp;
211  s->plane[i].l_h[1] = s->plane[i].idwt_tmp + 2 * w8 * h8;
212  //s->plane[i].l_h[2] = ll2;
213  s->plane[i].l_h[3] = s->plane[i].idwt_tmp;
214  s->plane[i].l_h[4] = s->plane[i].idwt_tmp + 2 * w4 * h4;
215  //s->plane[i].l_h[5] = ll1;
216  s->plane[i].l_h[6] = s->plane[i].idwt_tmp;
217  s->plane[i].l_h[7] = s->plane[i].idwt_tmp + 2 * w2 * h2;
218  }
219 
220  s->a_height = s->coded_height;
221  s->a_width = s->coded_width;
222  s->a_format = s->coded_format;
223 
224  return 0;
225 }
226 
227 static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
228  AVPacket *avpkt)
229 {
230  CFHDContext *s = avctx->priv_data;
231  GetByteContext gb;
232  ThreadFrame frame = { .f = data };
233  AVFrame *pic = data;
234  int ret = 0, i, j, planes, plane, got_buffer = 0;
235  int16_t *coeff_data;
236 
240 
241  bytestream2_init(&gb, avpkt->data, avpkt->size);
242 
243  while (bytestream2_get_bytes_left(&gb) > 4) {
244  /* Bit weird but implement the tag parsing as the spec says */
245  uint16_t tagu = bytestream2_get_be16(&gb);
246  int16_t tag = (int16_t)tagu;
247  int8_t tag8 = (int8_t)(tagu >> 8);
248  uint16_t abstag = abs(tag);
249  int8_t abs_tag8 = abs(tag8);
250  uint16_t data = bytestream2_get_be16(&gb);
251  if (abs_tag8 >= 0x60 && abs_tag8 <= 0x6f) {
252  av_log(avctx, AV_LOG_DEBUG, "large len %x\n", ((tagu & 0xff) << 16) | data);
253  } else if (tag == 20) {
254  av_log(avctx, AV_LOG_DEBUG, "Width %"PRIu16"\n", data);
255  s->coded_width = data;
256  } else if (tag == 21) {
257  av_log(avctx, AV_LOG_DEBUG, "Height %"PRIu16"\n", data);
258  s->coded_height = data;
259  } else if (tag == 101) {
260  av_log(avctx, AV_LOG_DEBUG, "Bits per component: %"PRIu16"\n", data);
261  if (data < 1 || data > 31) {
262  av_log(avctx, AV_LOG_ERROR, "Bits per component %d is invalid\n", data);
263  ret = AVERROR(EINVAL);
264  break;
265  }
266  s->bpc = data;
267  } else if (tag == 12) {
268  av_log(avctx, AV_LOG_DEBUG, "Channel Count: %"PRIu16"\n", data);
269  s->channel_cnt = data;
270  if (data > 4) {
271  av_log(avctx, AV_LOG_ERROR, "Channel Count of %"PRIu16" is unsupported\n", data);
272  ret = AVERROR_PATCHWELCOME;
273  break;
274  }
275  } else if (tag == 14) {
276  av_log(avctx, AV_LOG_DEBUG, "Subband Count: %"PRIu16"\n", data);
277  if (data != SUBBAND_COUNT) {
278  av_log(avctx, AV_LOG_ERROR, "Subband Count of %"PRIu16" is unsupported\n", data);
279  ret = AVERROR_PATCHWELCOME;
280  break;
281  }
282  } else if (tag == 62) {
283  s->channel_num = data;
284  av_log(avctx, AV_LOG_DEBUG, "Channel number %"PRIu16"\n", data);
285  if (s->channel_num >= planes) {
286  av_log(avctx, AV_LOG_ERROR, "Invalid channel number\n");
287  ret = AVERROR(EINVAL);
288  break;
289  }
291  } else if (tag == 48) {
292  if (s->subband_num != 0 && data == 1) // hack
293  s->level++;
294  av_log(avctx, AV_LOG_DEBUG, "Subband number %"PRIu16"\n", data);
295  s->subband_num = data;
296  if (s->level >= DWT_LEVELS) {
297  av_log(avctx, AV_LOG_ERROR, "Invalid level\n");
298  ret = AVERROR(EINVAL);
299  break;
300  }
301  if (s->subband_num > 3) {
302  av_log(avctx, AV_LOG_ERROR, "Invalid subband number\n");
303  ret = AVERROR(EINVAL);
304  break;
305  }
306  } else if (tag == 51) {
307  av_log(avctx, AV_LOG_DEBUG, "Subband number actual %"PRIu16"\n", data);
309  if (s->subband_num_actual >= 10) {
310  av_log(avctx, AV_LOG_ERROR, "Invalid subband number actual\n");
311  ret = AVERROR(EINVAL);
312  break;
313  }
314  } else if (tag == 35)
315  av_log(avctx, AV_LOG_DEBUG, "Lowpass precision bits: %"PRIu16"\n", data);
316  else if (tag == 53) {
317  s->quantisation = data;
318  av_log(avctx, AV_LOG_DEBUG, "Quantisation: %"PRIu16"\n", data);
319  } else if (tag == 109) {
320  s->prescale_shift[0] = (data >> 0) & 0x7;
321  s->prescale_shift[1] = (data >> 3) & 0x7;
322  s->prescale_shift[2] = (data >> 6) & 0x7;
323  av_log(avctx, AV_LOG_DEBUG, "Prescale shift (VC-5): %x\n", data);
324  } else if (tag == 27) {
325  av_log(avctx, AV_LOG_DEBUG, "Lowpass width %"PRIu16"\n", data);
326  if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_width) {
327  av_log(avctx, AV_LOG_ERROR, "Invalid lowpass width\n");
328  ret = AVERROR(EINVAL);
329  break;
330  }
331  s->plane[s->channel_num].band[0][0].width = data;
332  s->plane[s->channel_num].band[0][0].stride = data;
333  } else if (tag == 28) {
334  av_log(avctx, AV_LOG_DEBUG, "Lowpass height %"PRIu16"\n", data);
335  if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_height) {
336  av_log(avctx, AV_LOG_ERROR, "Invalid lowpass height\n");
337  ret = AVERROR(EINVAL);
338  break;
339  }
340  s->plane[s->channel_num].band[0][0].height = data;
341  } else if (tag == 1)
342  av_log(avctx, AV_LOG_DEBUG, "Sample type? %"PRIu16"\n", data);
343  else if (tag == 10) {
344  if (data != 0) {
345  avpriv_report_missing_feature(avctx, "Transform type of %"PRIu16, data);
346  ret = AVERROR_PATCHWELCOME;
347  break;
348  }
349  av_log(avctx, AV_LOG_DEBUG, "Transform-type? %"PRIu16"\n", data);
350  } else if (abstag >= 0x4000 && abstag <= 0x40ff) {
351  av_log(avctx, AV_LOG_DEBUG, "Small chunk length %d %s\n", data * 4, tag < 0 ? "optional" : "required");
352  bytestream2_skipu(&gb, data * 4);
353  } else if (tag == 23) {
354  av_log(avctx, AV_LOG_DEBUG, "Skip frame\n");
355  avpriv_report_missing_feature(avctx, "Skip frame");
356  ret = AVERROR_PATCHWELCOME;
357  break;
358  } else if (tag == 2) {
359  av_log(avctx, AV_LOG_DEBUG, "tag=2 header - skipping %i tag/value pairs\n", data);
360  if (data > bytestream2_get_bytes_left(&gb) / 4) {
361  av_log(avctx, AV_LOG_ERROR, "too many tag/value pairs (%d)\n", data);
362  ret = AVERROR_INVALIDDATA;
363  break;
364  }
365  for (i = 0; i < data; i++) {
366  uint16_t tag2 = bytestream2_get_be16(&gb);
367  uint16_t val2 = bytestream2_get_be16(&gb);
368  av_log(avctx, AV_LOG_DEBUG, "Tag/Value = %x %x\n", tag2, val2);
369  }
370  } else if (tag == 41) {
371  av_log(avctx, AV_LOG_DEBUG, "Highpass width %i channel %i level %i subband %i\n", data, s->channel_num, s->level, s->subband_num);
372  if (data < 3) {
373  av_log(avctx, AV_LOG_ERROR, "Invalid highpass width\n");
374  ret = AVERROR(EINVAL);
375  break;
376  }
377  s->plane[s->channel_num].band[s->level][s->subband_num].width = data;
378  s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
379  } else if (tag == 42) {
380  av_log(avctx, AV_LOG_DEBUG, "Highpass height %i\n", data);
381  if (data < 3) {
382  av_log(avctx, AV_LOG_ERROR, "Invalid highpass height\n");
383  ret = AVERROR(EINVAL);
384  break;
385  }
386  s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
387  } else if (tag == 49) {
388  av_log(avctx, AV_LOG_DEBUG, "Highpass width2 %i\n", data);
389  if (data < 3) {
390  av_log(avctx, AV_LOG_ERROR, "Invalid highpass width2\n");
391  ret = AVERROR(EINVAL);
392  break;
393  }
394  s->plane[s->channel_num].band[s->level][s->subband_num].width = data;
395  s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
396  } else if (tag == 50) {
397  av_log(avctx, AV_LOG_DEBUG, "Highpass height2 %i\n", data);
398  if (data < 3) {
399  av_log(avctx, AV_LOG_ERROR, "Invalid highpass height2\n");
400  ret = AVERROR(EINVAL);
401  break;
402  }
403  s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
404  } else if (tag == 71) {
405  s->codebook = data;
406  av_log(avctx, AV_LOG_DEBUG, "Codebook %i\n", s->codebook);
407  } else if (tag == 72) {
408  s->codebook = data;
409  av_log(avctx, AV_LOG_DEBUG, "Other codebook? %i\n", s->codebook);
410  } else if (tag == 70) {
411  av_log(avctx, AV_LOG_DEBUG, "Subsampling or bit-depth flag? %i\n", data);
412  if (!(data == 10 || data == 12)) {
413  av_log(avctx, AV_LOG_ERROR, "Invalid bits per channel\n");
414  ret = AVERROR(EINVAL);
415  break;
416  }
417  s->bpc = data;
418  } else if (tag == 84) {
419  av_log(avctx, AV_LOG_DEBUG, "Sample format? %i\n", data);
420  if (data == 1)
422  else if (data == 3)
424  else if (data == 4)
426  else {
427  avpriv_report_missing_feature(avctx, "Sample format of %"PRIu16, data);
428  ret = AVERROR_PATCHWELCOME;
429  break;
430  }
432  } else
433  av_log(avctx, AV_LOG_DEBUG, "Unknown tag %i data %x\n", tag, data);
434 
435  /* Some kind of end of header tag */
436  if (tag == 4 && data == 0x1a4a && s->coded_width && s->coded_height &&
438  if (s->a_width != s->coded_width || s->a_height != s->coded_height ||
439  s->a_format != s->coded_format) {
440  free_buffers(avctx);
441  if ((ret = alloc_buffers(avctx)) < 0) {
442  free_buffers(avctx);
443  return ret;
444  }
445  }
446  ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height);
447  if (ret < 0)
448  return ret;
449  frame.f->width =
450  frame.f->height = 0;
451 
452  if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
453  return ret;
454 
455  s->coded_width = 0;
456  s->coded_height = 0;
458  got_buffer = 1;
459  }
460  coeff_data = s->plane[s->channel_num].subband[s->subband_num_actual];
461 
462  /* Lowpass coefficients */
463  if (tag == 4 && data == 0xf0f && s->a_width && s->a_height) {
464  int lowpass_height = s->plane[s->channel_num].band[0][0].height;
465  int lowpass_width = s->plane[s->channel_num].band[0][0].width;
466  int lowpass_a_height = s->plane[s->channel_num].band[0][0].a_height;
467  int lowpass_a_width = s->plane[s->channel_num].band[0][0].a_width;
468 
469  if (!got_buffer) {
470  av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
471  ret = AVERROR(EINVAL);
472  goto end;
473  }
474 
475  if (lowpass_height > lowpass_a_height || lowpass_width > lowpass_a_width ||
476  lowpass_a_width * lowpass_a_height * sizeof(int16_t) > bytestream2_get_bytes_left(&gb)) {
477  av_log(avctx, AV_LOG_ERROR, "Too many lowpass coefficients\n");
478  ret = AVERROR(EINVAL);
479  goto end;
480  }
481 
482  av_log(avctx, AV_LOG_DEBUG, "Start of lowpass coeffs component %d height:%d, width:%d\n", s->channel_num, lowpass_height, lowpass_width);
483  for (i = 0; i < lowpass_height; i++) {
484  for (j = 0; j < lowpass_width; j++)
485  coeff_data[j] = bytestream2_get_be16u(&gb);
486 
487  coeff_data += lowpass_width;
488  }
489 
490  /* Align to mod-4 position to continue reading tags */
491  bytestream2_seek(&gb, bytestream2_tell(&gb) & 3, SEEK_CUR);
492 
493  /* Copy last line of coefficients if odd height */
494  if (lowpass_height & 1) {
495  memcpy(&coeff_data[lowpass_height * lowpass_width],
496  &coeff_data[(lowpass_height - 1) * lowpass_width],
497  lowpass_width * sizeof(*coeff_data));
498  }
499 
500  av_log(avctx, AV_LOG_DEBUG, "Lowpass coefficients %d\n", lowpass_width * lowpass_height);
501  }
502 
503  if (tag == 55 && s->subband_num_actual != 255 && s->a_width && s->a_height) {
504  int highpass_height = s->plane[s->channel_num].band[s->level][s->subband_num].height;
505  int highpass_width = s->plane[s->channel_num].band[s->level][s->subband_num].width;
506  int highpass_a_width = s->plane[s->channel_num].band[s->level][s->subband_num].a_width;
507  int highpass_a_height = s->plane[s->channel_num].band[s->level][s->subband_num].a_height;
508  int highpass_stride = s->plane[s->channel_num].band[s->level][s->subband_num].stride;
509  int expected;
510  int a_expected = highpass_a_height * highpass_a_width;
511  int level, run, coeff;
512  int count = 0, bytes;
513 
514  if (!got_buffer) {
515  av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
516  ret = AVERROR(EINVAL);
517  goto end;
518  }
519 
520  if (highpass_height > highpass_a_height || highpass_width > highpass_a_width || a_expected < highpass_height * (uint64_t)highpass_stride) {
521  av_log(avctx, AV_LOG_ERROR, "Too many highpass coefficients\n");
522  ret = AVERROR(EINVAL);
523  goto end;
524  }
525  expected = highpass_height * highpass_stride;
526 
527  av_log(avctx, AV_LOG_DEBUG, "Start subband coeffs plane %i level %i codebook %i expected %i\n", s->channel_num, s->level, s->codebook, expected);
528 
530  {
531  OPEN_READER(re, &s->gb);
532  if (!s->codebook) {
533  while (1) {
534  UPDATE_CACHE(re, &s->gb);
535  GET_RL_VLC(level, run, re, &s->gb, s->table_9_rl_vlc,
536  VLC_BITS, 3, 1);
537 
538  /* escape */
539  if (level == 64)
540  break;
541 
542  count += run;
543 
544  if (count > expected)
545  break;
546 
547  coeff = dequant_and_decompand(level, s->quantisation);
548  for (i = 0; i < run; i++)
549  *coeff_data++ = coeff;
550  }
551  } else {
552  while (1) {
553  UPDATE_CACHE(re, &s->gb);
554  GET_RL_VLC(level, run, re, &s->gb, s->table_18_rl_vlc,
555  VLC_BITS, 3, 1);
556 
557  /* escape */
558  if (level == 255 && run == 2)
559  break;
560 
561  count += run;
562 
563  if (count > expected)
564  break;
565 
566  coeff = dequant_and_decompand(level, s->quantisation);
567  for (i = 0; i < run; i++)
568  *coeff_data++ = coeff;
569  }
570  }
571  CLOSE_READER(re, &s->gb);
572  }
573 
574  if (count > expected) {
575  av_log(avctx, AV_LOG_ERROR, "Escape codeword not found, probably corrupt data\n");
576  ret = AVERROR(EINVAL);
577  goto end;
578  }
579 
580  bytes = FFALIGN(FF_CEIL_RSHIFT(get_bits_count(&s->gb), 3), 4);
581  if (bytes > bytestream2_get_bytes_left(&gb)) {
582  av_log(avctx, AV_LOG_ERROR, "Bitstream overread error\n");
583  ret = AVERROR(EINVAL);
584  goto end;
585  } else
586  bytestream2_seek(&gb, bytes, SEEK_CUR);
587 
588  av_log(avctx, AV_LOG_DEBUG, "End subband coeffs %i extra %i\n", count, count - expected);
589  s->codebook = 0;
590 
591  /* Copy last line of coefficients if odd height */
592  if (highpass_height & 1) {
593  memcpy(&coeff_data[highpass_height * highpass_stride],
594  &coeff_data[(highpass_height - 1) * highpass_stride],
595  highpass_stride * sizeof(*coeff_data));
596  }
597  }
598  }
599 
600  if (!s->a_width || !s->a_height || s->a_format == AV_PIX_FMT_NONE ||
602  av_log(avctx, AV_LOG_ERROR, "Invalid dimensions\n");
603  ret = AVERROR(EINVAL);
604  goto end;
605  }
606 
607  if (!got_buffer) {
608  av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
609  ret = AVERROR(EINVAL);
610  goto end;
611  }
612 
613  planes = av_pix_fmt_count_planes(avctx->pix_fmt);
614  for (plane = 0; plane < planes && !ret; plane++) {
615  /* level 1 */
616  int lowpass_height = s->plane[plane].band[0][0].height;
617  int lowpass_width = s->plane[plane].band[0][0].width;
618  int highpass_stride = s->plane[plane].band[0][1].stride;
619  int act_plane = plane == 1 ? 2 : plane == 2 ? 1 : plane;
620  int16_t *low, *high, *output, *dst;
621 
622  if (lowpass_height > s->plane[plane].band[0][0].a_height || lowpass_width > s->plane[plane].band[0][0].a_width ||
623  !highpass_stride || s->plane[plane].band[0][1].width > s->plane[plane].band[0][1].a_width) {
624  av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
625  ret = AVERROR(EINVAL);
626  goto end;
627  }
628 
629  av_log(avctx, AV_LOG_DEBUG, "Decoding level 1 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
630 
631  low = s->plane[plane].subband[0];
632  high = s->plane[plane].subband[2];
633  output = s->plane[plane].l_h[0];
634  for (i = 0; i < lowpass_width; i++) {
635  vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
636  low++;
637  high++;
638  output++;
639  }
640 
641  low = s->plane[plane].subband[1];
642  high = s->plane[plane].subband[3];
643  output = s->plane[plane].l_h[1];
644 
645  for (i = 0; i < lowpass_width; i++) {
646  // note the stride of "low" is highpass_stride
647  vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
648  low++;
649  high++;
650  output++;
651  }
652 
653  low = s->plane[plane].l_h[0];
654  high = s->plane[plane].l_h[1];
655  output = s->plane[plane].subband[0];
656  for (i = 0; i < lowpass_height * 2; i++) {
657  horiz_filter(output, low, high, lowpass_width);
658  low += lowpass_width;
659  high += lowpass_width;
660  output += lowpass_width * 2;
661  }
662  if (s->bpc == 12) {
663  output = s->plane[plane].subband[0];
664  for (i = 0; i < lowpass_height * 2; i++) {
665  for (j = 0; j < lowpass_width * 2; j++)
666  output[j] *= 4;
667 
668  output += lowpass_width * 2;
669  }
670  }
671 
672  /* level 2 */
673  lowpass_height = s->plane[plane].band[1][1].height;
674  lowpass_width = s->plane[plane].band[1][1].width;
675  highpass_stride = s->plane[plane].band[1][1].stride;
676 
677  if (lowpass_height > s->plane[plane].band[1][1].a_height || lowpass_width > s->plane[plane].band[1][1].a_width ||
678  !highpass_stride || s->plane[plane].band[1][1].width > s->plane[plane].band[1][1].a_width) {
679  av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
680  ret = AVERROR(EINVAL);
681  goto end;
682  }
683 
684  av_log(avctx, AV_LOG_DEBUG, "Level 2 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
685 
686  low = s->plane[plane].subband[0];
687  high = s->plane[plane].subband[5];
688  output = s->plane[plane].l_h[3];
689  for (i = 0; i < lowpass_width; i++) {
690  vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
691  low++;
692  high++;
693  output++;
694  }
695 
696  low = s->plane[plane].subband[4];
697  high = s->plane[plane].subband[6];
698  output = s->plane[plane].l_h[4];
699  for (i = 0; i < lowpass_width; i++) {
700  vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
701  low++;
702  high++;
703  output++;
704  }
705 
706  low = s->plane[plane].l_h[3];
707  high = s->plane[plane].l_h[4];
708  output = s->plane[plane].subband[0];
709  for (i = 0; i < lowpass_height * 2; i++) {
710  horiz_filter(output, low, high, lowpass_width);
711  low += lowpass_width;
712  high += lowpass_width;
713  output += lowpass_width * 2;
714  }
715 
716  output = s->plane[plane].subband[0];
717  for (i = 0; i < lowpass_height * 2; i++) {
718  for (j = 0; j < lowpass_width * 2; j++)
719  output[j] *= 4;
720 
721  output += lowpass_width * 2;
722  }
723 
724  /* level 3 */
725  lowpass_height = s->plane[plane].band[2][1].height;
726  lowpass_width = s->plane[plane].band[2][1].width;
727  highpass_stride = s->plane[plane].band[2][1].stride;
728 
729  if (lowpass_height > s->plane[plane].band[2][1].a_height || lowpass_width > s->plane[plane].band[2][1].a_width ||
730  !highpass_stride || s->plane[plane].band[2][1].width > s->plane[plane].band[2][1].a_width) {
731  av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
732  ret = AVERROR(EINVAL);
733  goto end;
734  }
735 
736  av_log(avctx, AV_LOG_DEBUG, "Level 3 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
737 
738  low = s->plane[plane].subband[0];
739  high = s->plane[plane].subband[8];
740  output = s->plane[plane].l_h[6];
741  for (i = 0; i < lowpass_width; i++) {
742  vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
743  low++;
744  high++;
745  output++;
746  }
747 
748  low = s->plane[plane].subband[7];
749  high = s->plane[plane].subband[9];
750  output = s->plane[plane].l_h[7];
751  for (i = 0; i < lowpass_width; i++) {
752  vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
753  low++;
754  high++;
755  output++;
756  }
757 
758  dst = (int16_t *)pic->data[act_plane];
759  low = s->plane[plane].l_h[6];
760  high = s->plane[plane].l_h[7];
761  for (i = 0; i < lowpass_height * 2; i++) {
762  horiz_filter_clip(dst, low, high, lowpass_width, s->bpc);
763  low += lowpass_width;
764  high += lowpass_width;
765  dst += pic->linesize[act_plane] / 2;
766  }
767  }
768 
769 
770 end:
771  if (ret < 0)
772  return ret;
773 
774  *got_frame = 1;
775  return avpkt->size;
776 }
777 
779 {
780  CFHDContext *s = avctx->priv_data;
781 
782  free_buffers(avctx);
783 
784  if (!avctx->internal->is_copy) {
785  ff_free_vlc(&s->vlc_9);
786  ff_free_vlc(&s->vlc_18);
787  }
788 
789  return 0;
790 }
791 
793  .name = "cfhd",
794  .long_name = NULL_IF_CONFIG_SMALL("Cineform HD"),
795  .type = AVMEDIA_TYPE_VIDEO,
796  .id = AV_CODEC_ID_CFHD,
797  .priv_data_size = sizeof(CFHDContext),
799  .close = cfhd_close_decoder,
800  .decode = cfhd_decode,
803 };
#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
int channel_cnt
Definition: cfhd.h:94
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:768
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: cfhd.c:227
VLC vlc_18
Definition: cfhd.h:78
This structure describes decoded (raw) audio or video data.
Definition: frame.h:187
AVCodecContext * avctx
Definition: cfhd.h:72
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
int coded_format
Definition: cfhd.h:87
float re
Definition: fft.c:82
misc image utilities
AVFrame * f
Definition: thread.h:36
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2373
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 av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int a_height
Definition: cfhd.h:49
static int dequant_and_decompand(int level, int quantisation)
Definition: cfhd.c:74
int size
Definition: avcodec.h:1658
#define VLC_BITS
Definition: asvdec.c:37
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
int16_t * idwt_tmp
Definition: cfhd.h:62
int a_width
Definition: cfhd.h:89
uint8_t run
Definition: svq3.c:206
int subband_num_actual
Definition: cfhd.h:105
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:3133
AVCodec.
Definition: avcodec.h:3681
int chroma_x_shift
Definition: cfhd.h:82
int width
Definition: cfhd.h:48
static void horiz_filter(int16_t *output, int16_t *low, int16_t *high, int width)
Definition: cfhd.c:121
#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.
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
Multithreading support functions.
int16_t * idwt_buf
Definition: cfhd.h:61
static void filter(int16_t *output, ptrdiff_t out_stride, int16_t *low, ptrdiff_t low_stride, int16_t *high, ptrdiff_t high_stride, int len, uint8_t clip)
Definition: cfhd.c:80
int a_format
Definition: cfhd.h:91
static AVFrame * frame
static int alloc_buffers(AVCodecContext *avctx)
Definition: cfhd.c:156
#define height
uint8_t * data
Definition: avcodec.h:1657
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:199
const uint8_t * buffer
Definition: bytestream.h:34
uint32_t tag
Definition: movenc.c:1413
static av_always_inline void bytestream2_skipu(GetByteContext *g, unsigned int size)
Definition: bytestream.h:170
#define FFALIGN(x, a)
Definition: macros.h:48
#define av_log(a,...)
CFHD_RL_VLC_ELEM table_18_rl_vlc[4572]
Definition: cfhd.h:77
CFHD_RL_VLC_ELEM table_9_rl_vlc[2088]
Definition: cfhd.h:74
uint8_t prescale_shift[3]
Definition: cfhd.h:107
#define UPDATE_CACHE(name, gb)
Definition: get_bits.h:160
int width
width and height of the video frame
Definition: frame.h:239
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int is_copy
Whether the parent AVCodecContext is a copy of the context which had init() called on it...
Definition: internal.h:111
#define AVERROR(e)
Definition: error.h:43
VLC vlc_9
Definition: cfhd.h:75
#define FF_CEIL_RSHIFT
Definition: common.h:61
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:179
static void vert_filter(int16_t *output, int out_stride, int16_t *low, int low_stride, int16_t *high, int high_stride, int len)
Definition: cfhd.c:131
static void horiz_filter_clip(int16_t *output, int16_t *low, int16_t *high, int width, uint8_t clip)
Definition: cfhd.c:126
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
int16_t * l_h[8]
Definition: cfhd.h:66
static av_always_inline unsigned int bytestream2_get_bytes_left(GetByteContext *g)
Definition: bytestream.h:154
#define AV_PIX_FMT_GBRAP12
Definition: pixfmt.h:372
#define DWT_LEVELS
Definition: cfhd.h:41
int stride
Definition: cfhd.h:46
const char * name
Name of the codec implementation.
Definition: avcodec.h:3688
GLsizei count
Definition: opengl_enc.c:109
#define CLOSE_READER(name, gb)
Definition: get_bits.h:131
static void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.h:229
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:1057
#define GET_RL_VLC(level, run, name, gb, table, bits,max_depth, need_update)
Definition: get_bits.h:509
int a_width
Definition: cfhd.h:47
static void init_frame_defaults(CFHDContext *s)
Definition: cfhd.c:57
SubBand band[DWT_LEVELS][4]
Definition: cfhd.h:68
int subband_cnt
Definition: cfhd.h:95
int chroma_y_shift
Definition: cfhd.h:83
#define width
#define FFSIGN(a)
Definition: common.h:73
int width
picture width / height.
Definition: avcodec.h:1919
static void init_plane_defaults(CFHDContext *s)
Definition: cfhd.c:50
uint16_t quantisation
Definition: cfhd.h:98
void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift)
Utility function to access log2_chroma_w log2_chroma_h from the pixel format AVPixFmtDescriptor.
Definition: imgconvert.c:38
int channel_num
Definition: cfhd.h:96
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
static av_always_inline int bytestream2_tell(GetByteContext *g)
Definition: bytestream.h:188
GetBitContext gb
Definition: cfhd.h:80
int wavelet_depth
Definition: cfhd.h:99
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:218
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
int codebook
Definition: cfhd.h:102
#define OPEN_READER(name, gb)
Definition: get_bits.h:120
int subband_num
Definition: cfhd.h:103
int pshift
Definition: cfhd.h:100
AVCodec ff_cfhd_decoder
Definition: cfhd.c:792
static av_cold int cfhd_close_decoder(AVCodecContext *avctx)
Definition: cfhd.c:778
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:425
refcounted data buffer API
int level
Definition: cfhd.h:104
#define SUBBAND_COUNT
Definition: cfhd.c:38
static av_cold int cfhd_decode_init(AVCodecContext *avctx)
Definition: cfhd.c:40
#define AV_PIX_FMT_GBRP12
Definition: pixfmt.h:368
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:352
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:201
uint8_t level
Definition: svq3.c:207
static void free_buffers(AVCodecContext *avctx)
Definition: cfhd.c:137
int coded_width
Definition: cfhd.h:85
GLint GLenum GLboolean GLsizei stride
Definition: opengl_enc.c:105
common internal api header.
common internal and external API header
static double clip(void *opaque, double val)
Clip value val in the minval - maxval range.
Definition: vf_lut.c:157
ptrdiff_t stride
Definition: cfhd.h:59
int bpc
Definition: cfhd.h:93
void * priv_data
Definition: avcodec.h:1774
int len
struct AVCodecInternal * internal
Private context used for internal data.
Definition: avcodec.h:1782
int a_height
Definition: cfhd.h:90
int height
Definition: cfhd.h:50
int16_t * subband[10]
Definition: cfhd.h:65
static const double coeff[2][5]
Definition: vf_owdenoise.c:72
static av_always_inline int bytestream2_seek(GetByteContext *g, int offset, int whence)
Definition: bytestream.h:208
int width
Definition: cfhd.h:57
int height
Definition: frame.h:239
int ff_cfhd_init_vlcs(CFHDContext *s)
Definition: cfhddata.c:228
#define av_freep(p)
static int decode(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *pkt)
Definition: ffmpeg.c:2257
#define av_malloc_array(a, b)
#define stride
Plane plane[4]
Definition: cfhd.h:108
int height
Definition: cfhd.h:58
uint8_t lowpass_precision
Definition: cfhd.h:97
This structure stores compressed data.
Definition: avcodec.h:1634
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:994
for(j=16;j >0;--j)
int coded_height
Definition: cfhd.h:86
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