avfilter/vf_framerate: change blend factor precision
[ffmpeg.git] / libavcodec / cfhd.c
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  * Cineform HD video decoder
24  */
25
26 #include "libavutil/attributes.h"
27 #include "libavutil/buffer.h"
28 #include "libavutil/common.h"
29 #include "libavutil/imgutils.h"
30 #include "libavutil/intreadwrite.h"
31 #include "libavutil/opt.h"
32
33 #include "avcodec.h"
34 #include "bytestream.h"
35 #include "get_bits.h"
36 #include "internal.h"
37 #include "thread.h"
38 #include "cfhd.h"
39
40 enum CFHDParam {
41     ChannelCount     =  12,
42     SubbandCount     =  14,
43     ImageWidth       =  20,
44     ImageHeight      =  21,
45     LowpassPrecision =  35,
46     SubbandNumber    =  48,
47     Quantization     =  53,
48     ChannelNumber    =  62,
49     BitsPerComponent = 101,
50     ChannelWidth     = 104,
51     ChannelHeight    = 105,
52     PrescaleShift    = 109,
53 };
54
55 static av_cold int cfhd_init(AVCodecContext *avctx)
56 {
57     CFHDContext *s = avctx->priv_data;
58
59     avctx->bits_per_raw_sample = 10;
60     s->avctx                   = avctx;
61
62     return ff_cfhd_init_vlcs(s);
63 }
64
65 static void init_plane_defaults(CFHDContext *s)
66 {
67     s->subband_num        = 0;
68     s->level              = 0;
69     s->subband_num_actual = 0;
70 }
71
72 static void init_frame_defaults(CFHDContext *s)
73 {
74     s->coded_width       = 0;
75     s->coded_height      = 0;
76     s->cropped_height    = 0;
77     s->bpc               = 10;
78     s->channel_cnt       = 4;
79     s->subband_cnt       = SUBBAND_COUNT;
80     s->channel_num       = 0;
81     s->lowpass_precision = 16;
82     s->quantisation      = 1;
83     s->wavelet_depth     = 3;
84     s->pshift            = 1;
85     s->codebook          = 0;
86     init_plane_defaults(s);
87 }
88
89 /* TODO: merge with VLC tables or use LUT */
90 static inline int dequant_and_decompand(int level, int quantisation)
91 {
92     int64_t abslevel = abs(level);
93     return (abslevel + ((768 * abslevel * abslevel * abslevel) / (255 * 255 * 255))) *
94            FFSIGN(level) * quantisation;
95 }
96
97 static inline void filter(int16_t *output, ptrdiff_t out_stride,
98                           int16_t *low, ptrdiff_t low_stride,
99                           int16_t *high, ptrdiff_t high_stride,
100                           int len, int clip)
101 {
102     int16_t tmp;
103     int i;
104
105     for (i = 0; i < len; i++) {
106         if (i == 0) {
107             tmp = (11*low[0*low_stride] - 4*low[1*low_stride] + low[2*low_stride] + 4) >> 3;
108             output[(2*i+0)*out_stride] = (tmp + high[0*high_stride]) >> 1;
109             if (clip)
110                 output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
111
112             tmp = ( 5*low[0*low_stride] + 4*low[1*low_stride] - low[2*low_stride] + 4) >> 3;
113             output[(2*i+1)*out_stride] = (tmp - high[0*high_stride]) >> 1;
114             if (clip)
115                 output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
116         } else if (i == len-1) {
117             tmp = ( 5*low[i*low_stride] + 4*low[(i-1)*low_stride] - low[(i-2)*low_stride] + 4) >> 3;
118             output[(2*i+0)*out_stride] = (tmp + high[i*high_stride]) >> 1;
119             if (clip)
120                 output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
121
122             tmp = (11*low[i*low_stride] - 4*low[(i-1)*low_stride] + low[(i-2)*low_stride] + 4) >> 3;
123             output[(2*i+1)*out_stride] = (tmp - high[i*high_stride]) >> 1;
124             if (clip)
125                 output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
126         } else {
127             tmp = (low[(i-1)*low_stride] - low[(i+1)*low_stride] + 4) >> 3;
128             output[(2*i+0)*out_stride] = (tmp + low[i*low_stride] + high[i*high_stride]) >> 1;
129             if (clip)
130                 output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
131
132             tmp = (low[(i+1)*low_stride] - low[(i-1)*low_stride] + 4) >> 3;
133             output[(2*i+1)*out_stride] = (tmp + low[i*low_stride] - high[i*high_stride]) >> 1;
134             if (clip)
135                 output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
136         }
137     }
138 }
139
140 static void horiz_filter(int16_t *output, int16_t *low, int16_t *high,
141                          int width)
142 {
143     filter(output, 1, low, 1, high, 1, width, 0);
144 }
145
146 static void horiz_filter_clip(int16_t *output, int16_t *low, int16_t *high,
147                               int width, int clip)
148 {
149     filter(output, 1, low, 1, high, 1, width, clip);
150 }
151
152 static void vert_filter(int16_t *output, ptrdiff_t out_stride,
153                         int16_t *low, ptrdiff_t low_stride,
154                         int16_t *high, ptrdiff_t high_stride, int len)
155 {
156     filter(output, out_stride, low, low_stride, high, high_stride, len, 0);
157 }
158
159 static void free_buffers(CFHDContext *s)
160 {
161     int i, j;
162
163     for (i = 0; i < FF_ARRAY_ELEMS(s->plane); i++) {
164         av_freep(&s->plane[i].idwt_buf);
165         av_freep(&s->plane[i].idwt_tmp);
166
167         for (j = 0; j < 9; j++)
168             s->plane[i].subband[j] = NULL;
169
170         for (j = 0; j < 8; j++)
171             s->plane[i].l_h[j] = NULL;
172     }
173     s->a_height = 0;
174     s->a_width  = 0;
175 }
176
177 static int alloc_buffers(AVCodecContext *avctx)
178 {
179     CFHDContext *s = avctx->priv_data;
180     int i, j, ret, planes;
181     int chroma_x_shift, chroma_y_shift;
182     unsigned k;
183
184     if ((ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height)) < 0)
185         return ret;
186     avctx->pix_fmt = s->coded_format;
187
188     if ((ret = av_pix_fmt_get_chroma_sub_sample(s->coded_format,
189                                                 &chroma_x_shift,
190                                                 &chroma_y_shift)) < 0)
191         return ret;
192     planes = av_pix_fmt_count_planes(s->coded_format);
193
194     for (i = 0; i < planes; i++) {
195         int w8, h8, w4, h4, w2, h2;
196         int width  = i ? avctx->width  >> chroma_x_shift : avctx->width;
197         int height = i ? avctx->height >> chroma_y_shift : avctx->height;
198         ptrdiff_t stride = FFALIGN(width  / 8, 8) * 8;
199         height           = FFALIGN(height / 8, 2) * 8;
200         s->plane[i].width  = width;
201         s->plane[i].height = height;
202         s->plane[i].stride = stride;
203
204         w8 = FFALIGN(s->plane[i].width  / 8, 8);
205         h8 = FFALIGN(s->plane[i].height / 8, 2);
206         w4 = w8 * 2;
207         h4 = h8 * 2;
208         w2 = w4 * 2;
209         h2 = h4 * 2;
210
211         s->plane[i].idwt_buf =
212             av_mallocz_array(height * stride, sizeof(*s->plane[i].idwt_buf));
213         s->plane[i].idwt_tmp =
214             av_malloc_array(height * stride, sizeof(*s->plane[i].idwt_tmp));
215         if (!s->plane[i].idwt_buf || !s->plane[i].idwt_tmp)
216             return AVERROR(ENOMEM);
217
218         s->plane[i].subband[0] = s->plane[i].idwt_buf;
219         s->plane[i].subband[1] = s->plane[i].idwt_buf + 2 * w8 * h8;
220         s->plane[i].subband[2] = s->plane[i].idwt_buf + 1 * w8 * h8;
221         s->plane[i].subband[3] = s->plane[i].idwt_buf + 3 * w8 * h8;
222         s->plane[i].subband[4] = s->plane[i].idwt_buf + 2 * w4 * h4;
223         s->plane[i].subband[5] = s->plane[i].idwt_buf + 1 * w4 * h4;
224         s->plane[i].subband[6] = s->plane[i].idwt_buf + 3 * w4 * h4;
225         s->plane[i].subband[7] = s->plane[i].idwt_buf + 2 * w2 * h2;
226         s->plane[i].subband[8] = s->plane[i].idwt_buf + 1 * w2 * h2;
227         s->plane[i].subband[9] = s->plane[i].idwt_buf + 3 * w2 * h2;
228
229         for (j = 0; j < DWT_LEVELS; j++) {
230             for (k = 0; k < FF_ARRAY_ELEMS(s->plane[i].band[j]); k++) {
231                 s->plane[i].band[j][k].a_width  = w8 << j;
232                 s->plane[i].band[j][k].a_height = h8 << j;
233             }
234         }
235
236         /* ll2 and ll1 commented out because they are done in-place */
237         s->plane[i].l_h[0] = s->plane[i].idwt_tmp;
238         s->plane[i].l_h[1] = s->plane[i].idwt_tmp + 2 * w8 * h8;
239         // s->plane[i].l_h[2] = ll2;
240         s->plane[i].l_h[3] = s->plane[i].idwt_tmp;
241         s->plane[i].l_h[4] = s->plane[i].idwt_tmp + 2 * w4 * h4;
242         // s->plane[i].l_h[5] = ll1;
243         s->plane[i].l_h[6] = s->plane[i].idwt_tmp;
244         s->plane[i].l_h[7] = s->plane[i].idwt_tmp + 2 * w2 * h2;
245     }
246
247     s->a_height = s->coded_height;
248     s->a_width  = s->coded_width;
249     s->a_format = s->coded_format;
250
251     return 0;
252 }
253
254 static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
255                        AVPacket *avpkt)
256 {
257     CFHDContext *s = avctx->priv_data;
258     GetByteContext gb;
259     ThreadFrame frame = { .f = data };
260     AVFrame *pic = data;
261     int ret = 0, i, j, planes, plane, got_buffer = 0;
262     int16_t *coeff_data;
263
264     s->coded_format = AV_PIX_FMT_YUV422P10;
265     init_frame_defaults(s);
266     planes = av_pix_fmt_count_planes(s->coded_format);
267
268     bytestream2_init(&gb, avpkt->data, avpkt->size);
269
270     while (bytestream2_get_bytes_left(&gb) > 4) {
271         /* Bit weird but implement the tag parsing as the spec says */
272         uint16_t tagu   = bytestream2_get_be16(&gb);
273         int16_t tag     = (int16_t)tagu;
274         int8_t tag8     = (int8_t)(tagu >> 8);
275         uint16_t abstag = abs(tag);
276         int8_t abs_tag8 = abs(tag8);
277         uint16_t data   = bytestream2_get_be16(&gb);
278         if (abs_tag8 >= 0x60 && abs_tag8 <= 0x6f) {
279             av_log(avctx, AV_LOG_DEBUG, "large len %x\n", ((tagu & 0xff) << 16) | data);
280         } else if (tag == ImageWidth) {
281             av_log(avctx, AV_LOG_DEBUG, "Width %"PRIu16"\n", data);
282             s->coded_width = data;
283         } else if (tag == ImageHeight) {
284             av_log(avctx, AV_LOG_DEBUG, "Height %"PRIu16"\n", data);
285             s->coded_height = data;
286         } else if (tag == 101) {
287             av_log(avctx, AV_LOG_DEBUG, "Bits per component: %"PRIu16"\n", data);
288             if (data < 1 || data > 31) {
289                 av_log(avctx, AV_LOG_ERROR, "Bits per component %d is invalid\n", data);
290                 ret = AVERROR(EINVAL);
291                 break;
292             }
293             s->bpc = data;
294         } else if (tag == ChannelCount) {
295             av_log(avctx, AV_LOG_DEBUG, "Channel Count: %"PRIu16"\n", data);
296             s->channel_cnt = data;
297             if (data > 4) {
298                 av_log(avctx, AV_LOG_ERROR, "Channel Count of %"PRIu16" is unsupported\n", data);
299                 ret = AVERROR_PATCHWELCOME;
300                 break;
301             }
302         } else if (tag == SubbandCount) {
303             av_log(avctx, AV_LOG_DEBUG, "Subband Count: %"PRIu16"\n", data);
304             if (data != SUBBAND_COUNT) {
305                 av_log(avctx, AV_LOG_ERROR, "Subband Count of %"PRIu16" is unsupported\n", data);
306                 ret = AVERROR_PATCHWELCOME;
307                 break;
308             }
309         } else if (tag == ChannelNumber) {
310             s->channel_num = data;
311             av_log(avctx, AV_LOG_DEBUG, "Channel number %"PRIu16"\n", data);
312             if (s->channel_num >= planes) {
313                 av_log(avctx, AV_LOG_ERROR, "Invalid channel number\n");
314                 ret = AVERROR(EINVAL);
315                 break;
316             }
317             init_plane_defaults(s);
318         } else if (tag == SubbandNumber) {
319             if (s->subband_num != 0 && data == 1)  // hack
320                 s->level++;
321             av_log(avctx, AV_LOG_DEBUG, "Subband number %"PRIu16"\n", data);
322             s->subband_num = data;
323             if (s->level >= DWT_LEVELS) {
324                 av_log(avctx, AV_LOG_ERROR, "Invalid level\n");
325                 ret = AVERROR(EINVAL);
326                 break;
327             }
328             if (s->subband_num > 3) {
329                 av_log(avctx, AV_LOG_ERROR, "Invalid subband number\n");
330                 ret = AVERROR(EINVAL);
331                 break;
332             }
333         } else if (tag == 51) {
334             av_log(avctx, AV_LOG_DEBUG, "Subband number actual %"PRIu16"\n", data);
335             s->subband_num_actual = data;
336             if (s->subband_num_actual >= 10) {
337                 av_log(avctx, AV_LOG_ERROR, "Invalid subband number actual\n");
338                 ret = AVERROR(EINVAL);
339                 break;
340             }
341         } else if (tag == LowpassPrecision)
342             av_log(avctx, AV_LOG_DEBUG, "Lowpass precision bits: %"PRIu16"\n", data);
343         else if (tag == Quantization) {
344             s->quantisation = data;
345             av_log(avctx, AV_LOG_DEBUG, "Quantisation: %"PRIu16"\n", data);
346         } else if (tag == PrescaleShift) {
347             s->prescale_shift[0] = (data >> 0) & 0x7;
348             s->prescale_shift[1] = (data >> 3) & 0x7;
349             s->prescale_shift[2] = (data >> 6) & 0x7;
350             av_log(avctx, AV_LOG_DEBUG, "Prescale shift (VC-5): %x\n", data);
351         } else if (tag == 27) {
352             av_log(avctx, AV_LOG_DEBUG, "Lowpass width %"PRIu16"\n", data);
353             if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_width) {
354                 av_log(avctx, AV_LOG_ERROR, "Invalid lowpass width\n");
355                 ret = AVERROR(EINVAL);
356                 break;
357             }
358             s->plane[s->channel_num].band[0][0].width  = data;
359             s->plane[s->channel_num].band[0][0].stride = data;
360         } else if (tag == 28) {
361             av_log(avctx, AV_LOG_DEBUG, "Lowpass height %"PRIu16"\n", data);
362             if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_height) {
363                 av_log(avctx, AV_LOG_ERROR, "Invalid lowpass height\n");
364                 ret = AVERROR(EINVAL);
365                 break;
366             }
367             s->plane[s->channel_num].band[0][0].height = data;
368         } else if (tag == 1)
369             av_log(avctx, AV_LOG_DEBUG, "Sample type? %"PRIu16"\n", data);
370         else if (tag == 10) {
371             if (data != 0) {
372                 avpriv_report_missing_feature(avctx, "Transform type of %"PRIu16, data);
373                 ret = AVERROR_PATCHWELCOME;
374                 break;
375             }
376             av_log(avctx, AV_LOG_DEBUG, "Transform-type? %"PRIu16"\n", data);
377         } else if (abstag >= 0x4000 && abstag <= 0x40ff) {
378             av_log(avctx, AV_LOG_DEBUG, "Small chunk length %d %s\n", data * 4, tag < 0 ? "optional" : "required");
379             bytestream2_skipu(&gb, data * 4);
380         } else if (tag == 23) {
381             av_log(avctx, AV_LOG_DEBUG, "Skip frame\n");
382             avpriv_report_missing_feature(avctx, "Skip frame");
383             ret = AVERROR_PATCHWELCOME;
384             break;
385         } else if (tag == 2) {
386             av_log(avctx, AV_LOG_DEBUG, "tag=2 header - skipping %i tag/value pairs\n", data);
387             if (data > bytestream2_get_bytes_left(&gb) / 4) {
388                 av_log(avctx, AV_LOG_ERROR, "too many tag/value pairs (%d)\n", data);
389                 ret = AVERROR_INVALIDDATA;
390                 break;
391             }
392             for (i = 0; i < data; i++) {
393                 uint16_t tag2 = bytestream2_get_be16(&gb);
394                 uint16_t val2 = bytestream2_get_be16(&gb);
395                 av_log(avctx, AV_LOG_DEBUG, "Tag/Value = %x %x\n", tag2, val2);
396             }
397         } else if (tag == 41) {
398             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);
399             if (data < 3) {
400                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass width\n");
401                 ret = AVERROR(EINVAL);
402                 break;
403             }
404             s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;
405             s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
406         } else if (tag == 42) {
407             av_log(avctx, AV_LOG_DEBUG, "Highpass height %i\n", data);
408             if (data < 3) {
409                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass height\n");
410                 ret = AVERROR(EINVAL);
411                 break;
412             }
413             s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
414         } else if (tag == 49) {
415             av_log(avctx, AV_LOG_DEBUG, "Highpass width2 %i\n", data);
416             if (data < 3) {
417                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass width2\n");
418                 ret = AVERROR(EINVAL);
419                 break;
420             }
421             s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;
422             s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
423         } else if (tag == 50) {
424             av_log(avctx, AV_LOG_DEBUG, "Highpass height2 %i\n", data);
425             if (data < 3) {
426                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass height2\n");
427                 ret = AVERROR(EINVAL);
428                 break;
429             }
430             s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
431         } else if (tag == 71) {
432             s->codebook = data;
433             av_log(avctx, AV_LOG_DEBUG, "Codebook %i\n", s->codebook);
434         } else if (tag == 72) {
435             s->codebook = data;
436             av_log(avctx, AV_LOG_DEBUG, "Other codebook? %i\n", s->codebook);
437         } else if (tag == 70) {
438             av_log(avctx, AV_LOG_DEBUG, "Subsampling or bit-depth flag? %i\n", data);
439             if (!(data == 10 || data == 12)) {
440                 av_log(avctx, AV_LOG_ERROR, "Invalid bits per channel\n");
441                 ret = AVERROR(EINVAL);
442                 break;
443             }
444             s->bpc = data;
445         } else if (tag == 84) {
446             av_log(avctx, AV_LOG_DEBUG, "Sample format? %i\n", data);
447             if (data == 1)
448                 s->coded_format = AV_PIX_FMT_YUV422P10;
449             else if (data == 3)
450                 s->coded_format = AV_PIX_FMT_GBRP12;
451             else if (data == 4)
452                 s->coded_format = AV_PIX_FMT_GBRAP12;
453             else {
454                 avpriv_report_missing_feature(avctx, "Sample format of %"PRIu16, data);
455                 ret = AVERROR_PATCHWELCOME;
456                 break;
457             }
458             planes = av_pix_fmt_count_planes(s->coded_format);
459         } else if (tag == -85) {
460             av_log(avctx, AV_LOG_DEBUG, "Cropped height %"PRIu16"\n", data);
461             s->cropped_height = data;
462         } else
463             av_log(avctx, AV_LOG_DEBUG,  "Unknown tag %i data %x\n", tag, data);
464
465         /* Some kind of end of header tag */
466         if (tag == 4 && data == 0x1a4a && s->coded_width && s->coded_height &&
467             s->coded_format != AV_PIX_FMT_NONE) {
468             if (s->a_width != s->coded_width || s->a_height != s->coded_height ||
469                 s->a_format != s->coded_format) {
470                 free_buffers(s);
471                 if ((ret = alloc_buffers(avctx)) < 0) {
472                     free_buffers(s);
473                     return ret;
474                 }
475             }
476             ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height);
477             if (ret < 0)
478                 return ret;
479             if (s->cropped_height)
480                 avctx->height = s->cropped_height;
481             frame.f->width =
482             frame.f->height = 0;
483
484             if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
485                 return ret;
486
487             s->coded_width = 0;
488             s->coded_height = 0;
489             s->coded_format = AV_PIX_FMT_NONE;
490             got_buffer = 1;
491         }
492         coeff_data = s->plane[s->channel_num].subband[s->subband_num_actual];
493
494         /* Lowpass coefficients */
495         if (tag == 4 && data == 0xf0f && s->a_width && s->a_height) {
496             int lowpass_height = s->plane[s->channel_num].band[0][0].height;
497             int lowpass_width  = s->plane[s->channel_num].band[0][0].width;
498             int lowpass_a_height = s->plane[s->channel_num].band[0][0].a_height;
499             int lowpass_a_width  = s->plane[s->channel_num].band[0][0].a_width;
500
501             if (!got_buffer) {
502                 av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
503                 ret = AVERROR(EINVAL);
504                 goto end;
505             }
506
507             if (lowpass_height > lowpass_a_height || lowpass_width > lowpass_a_width ||
508                 lowpass_a_width * lowpass_a_height * sizeof(int16_t) > bytestream2_get_bytes_left(&gb)) {
509                 av_log(avctx, AV_LOG_ERROR, "Too many lowpass coefficients\n");
510                 ret = AVERROR(EINVAL);
511                 goto end;
512             }
513
514             av_log(avctx, AV_LOG_DEBUG, "Start of lowpass coeffs component %d height:%d, width:%d\n", s->channel_num, lowpass_height, lowpass_width);
515             for (i = 0; i < lowpass_height; i++) {
516                 for (j = 0; j < lowpass_width; j++)
517                     coeff_data[j] = bytestream2_get_be16u(&gb);
518
519                 coeff_data += lowpass_width;
520             }
521
522             /* Align to mod-4 position to continue reading tags */
523             bytestream2_seek(&gb, bytestream2_tell(&gb) & 3, SEEK_CUR);
524
525             /* Copy last line of coefficients if odd height */
526             if (lowpass_height & 1) {
527                 memcpy(&coeff_data[lowpass_height * lowpass_width],
528                        &coeff_data[(lowpass_height - 1) * lowpass_width],
529                        lowpass_width * sizeof(*coeff_data));
530             }
531
532             av_log(avctx, AV_LOG_DEBUG, "Lowpass coefficients %d\n", lowpass_width * lowpass_height);
533         }
534
535         if (tag == 55 && s->subband_num_actual != 255 && s->a_width && s->a_height) {
536             int highpass_height = s->plane[s->channel_num].band[s->level][s->subband_num].height;
537             int highpass_width  = s->plane[s->channel_num].band[s->level][s->subband_num].width;
538             int highpass_a_width = s->plane[s->channel_num].band[s->level][s->subband_num].a_width;
539             int highpass_a_height = s->plane[s->channel_num].band[s->level][s->subband_num].a_height;
540             int highpass_stride = s->plane[s->channel_num].band[s->level][s->subband_num].stride;
541             int expected;
542             int a_expected = highpass_a_height * highpass_a_width;
543             int level, run, coeff;
544             int count = 0, bytes;
545
546             if (!got_buffer) {
547                 av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
548                 ret = AVERROR(EINVAL);
549                 goto end;
550             }
551
552             if (highpass_height > highpass_a_height || highpass_width > highpass_a_width || a_expected < highpass_height * (uint64_t)highpass_stride) {
553                 av_log(avctx, AV_LOG_ERROR, "Too many highpass coefficients\n");
554                 ret = AVERROR(EINVAL);
555                 goto end;
556             }
557             expected = highpass_height * highpass_stride;
558
559             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);
560
561             init_get_bits(&s->gb, gb.buffer, bytestream2_get_bytes_left(&gb) * 8);
562             {
563                 OPEN_READER(re, &s->gb);
564                 if (!s->codebook) {
565                     while (1) {
566                         UPDATE_CACHE(re, &s->gb);
567                         GET_RL_VLC(level, run, re, &s->gb, s->table_9_rl_vlc,
568                                    VLC_BITS, 3, 1);
569
570                         /* escape */
571                         if (level == 64)
572                             break;
573
574                         count += run;
575
576                         if (count > expected)
577                             break;
578
579                         coeff = dequant_and_decompand(level, s->quantisation);
580                         for (i = 0; i < run; i++)
581                             *coeff_data++ = coeff;
582                     }
583                 } else {
584                     while (1) {
585                         UPDATE_CACHE(re, &s->gb);
586                         GET_RL_VLC(level, run, re, &s->gb, s->table_18_rl_vlc,
587                                    VLC_BITS, 3, 1);
588
589                         /* escape */
590                         if (level == 255 && run == 2)
591                             break;
592
593                         count += run;
594
595                         if (count > expected)
596                             break;
597
598                         coeff = dequant_and_decompand(level, s->quantisation);
599                         for (i = 0; i < run; i++)
600                             *coeff_data++ = coeff;
601                     }
602                 }
603                 CLOSE_READER(re, &s->gb);
604             }
605
606             if (count > expected) {
607                 av_log(avctx, AV_LOG_ERROR, "Escape codeword not found, probably corrupt data\n");
608                 ret = AVERROR(EINVAL);
609                 goto end;
610             }
611
612             bytes = FFALIGN(FF_CEIL_RSHIFT(get_bits_count(&s->gb), 3), 4);
613             if (bytes > bytestream2_get_bytes_left(&gb)) {
614                 av_log(avctx, AV_LOG_ERROR, "Bitstream overread error\n");
615                 ret = AVERROR(EINVAL);
616                 goto end;
617             } else
618                 bytestream2_seek(&gb, bytes, SEEK_CUR);
619
620             av_log(avctx, AV_LOG_DEBUG, "End subband coeffs %i extra %i\n", count, count - expected);
621             s->codebook = 0;
622
623             /* Copy last line of coefficients if odd height */
624             if (highpass_height & 1) {
625                 memcpy(&coeff_data[highpass_height * highpass_stride],
626                        &coeff_data[(highpass_height - 1) * highpass_stride],
627                        highpass_stride * sizeof(*coeff_data));
628             }
629         }
630     }
631
632     if (!s->a_width || !s->a_height || s->a_format == AV_PIX_FMT_NONE ||
633         s->coded_width || s->coded_height || s->coded_format != AV_PIX_FMT_NONE) {
634         av_log(avctx, AV_LOG_ERROR, "Invalid dimensions\n");
635         ret = AVERROR(EINVAL);
636         goto end;
637     }
638
639     if (!got_buffer) {
640         av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
641         ret = AVERROR(EINVAL);
642         goto end;
643     }
644
645     planes = av_pix_fmt_count_planes(avctx->pix_fmt);
646     for (plane = 0; plane < planes && !ret; plane++) {
647         /* level 1 */
648         int lowpass_height  = s->plane[plane].band[0][0].height;
649         int lowpass_width   = s->plane[plane].band[0][0].width;
650         int highpass_stride = s->plane[plane].band[0][1].stride;
651         int act_plane = plane == 1 ? 2 : plane == 2 ? 1 : plane;
652         int16_t *low, *high, *output, *dst;
653
654         if (lowpass_height > s->plane[plane].band[0][0].a_height || lowpass_width > s->plane[plane].band[0][0].a_width ||
655             !highpass_stride || s->plane[plane].band[0][1].width > s->plane[plane].band[0][1].a_width) {
656             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
657             ret = AVERROR(EINVAL);
658             goto end;
659         }
660
661         av_log(avctx, AV_LOG_DEBUG, "Decoding level 1 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
662
663         low    = s->plane[plane].subband[0];
664         high   = s->plane[plane].subband[2];
665         output = s->plane[plane].l_h[0];
666         for (i = 0; i < lowpass_width; i++) {
667             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
668             low++;
669             high++;
670             output++;
671         }
672
673         low    = s->plane[plane].subband[1];
674         high   = s->plane[plane].subband[3];
675         output = s->plane[plane].l_h[1];
676
677         for (i = 0; i < lowpass_width; i++) {
678             // note the stride of "low" is highpass_stride
679             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
680             low++;
681             high++;
682             output++;
683         }
684
685         low    = s->plane[plane].l_h[0];
686         high   = s->plane[plane].l_h[1];
687         output = s->plane[plane].subband[0];
688         for (i = 0; i < lowpass_height * 2; i++) {
689             horiz_filter(output, low, high, lowpass_width);
690             low    += lowpass_width;
691             high   += lowpass_width;
692             output += lowpass_width * 2;
693         }
694         if (s->bpc == 12) {
695             output = s->plane[plane].subband[0];
696             for (i = 0; i < lowpass_height * 2; i++) {
697                 for (j = 0; j < lowpass_width * 2; j++)
698                     output[j] *= 4;
699
700                 output += lowpass_width * 2;
701             }
702         }
703
704         /* level 2 */
705         lowpass_height  = s->plane[plane].band[1][1].height;
706         lowpass_width   = s->plane[plane].band[1][1].width;
707         highpass_stride = s->plane[plane].band[1][1].stride;
708
709         if (lowpass_height > s->plane[plane].band[1][1].a_height || lowpass_width > s->plane[plane].band[1][1].a_width ||
710             !highpass_stride || s->plane[plane].band[1][1].width > s->plane[plane].band[1][1].a_width) {
711             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
712             ret = AVERROR(EINVAL);
713             goto end;
714         }
715
716         av_log(avctx, AV_LOG_DEBUG, "Level 2 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
717
718         low    = s->plane[plane].subband[0];
719         high   = s->plane[plane].subband[5];
720         output = s->plane[plane].l_h[3];
721         for (i = 0; i < lowpass_width; i++) {
722             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
723             low++;
724             high++;
725             output++;
726         }
727
728         low    = s->plane[plane].subband[4];
729         high   = s->plane[plane].subband[6];
730         output = s->plane[plane].l_h[4];
731         for (i = 0; i < lowpass_width; i++) {
732             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
733             low++;
734             high++;
735             output++;
736         }
737
738         low    = s->plane[plane].l_h[3];
739         high   = s->plane[plane].l_h[4];
740         output = s->plane[plane].subband[0];
741         for (i = 0; i < lowpass_height * 2; i++) {
742             horiz_filter(output, low, high, lowpass_width);
743             low    += lowpass_width;
744             high   += lowpass_width;
745             output += lowpass_width * 2;
746         }
747
748         output = s->plane[plane].subband[0];
749         for (i = 0; i < lowpass_height * 2; i++) {
750             for (j = 0; j < lowpass_width * 2; j++)
751                 output[j] *= 4;
752
753             output += lowpass_width * 2;
754         }
755
756         /* level 3 */
757         lowpass_height  = s->plane[plane].band[2][1].height;
758         lowpass_width   = s->plane[plane].band[2][1].width;
759         highpass_stride = s->plane[plane].band[2][1].stride;
760
761         if (lowpass_height > s->plane[plane].band[2][1].a_height || lowpass_width > s->plane[plane].band[2][1].a_width ||
762             !highpass_stride || s->plane[plane].band[2][1].width > s->plane[plane].band[2][1].a_width) {
763             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
764             ret = AVERROR(EINVAL);
765             goto end;
766         }
767
768         av_log(avctx, AV_LOG_DEBUG, "Level 3 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
769
770         low    = s->plane[plane].subband[0];
771         high   = s->plane[plane].subband[8];
772         output = s->plane[plane].l_h[6];
773         for (i = 0; i < lowpass_width; i++) {
774             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
775             low++;
776             high++;
777             output++;
778         }
779
780         low    = s->plane[plane].subband[7];
781         high   = s->plane[plane].subband[9];
782         output = s->plane[plane].l_h[7];
783         for (i = 0; i < lowpass_width; i++) {
784             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
785             low++;
786             high++;
787             output++;
788         }
789
790         dst = (int16_t *)pic->data[act_plane];
791         low  = s->plane[plane].l_h[6];
792         high = s->plane[plane].l_h[7];
793         for (i = 0; i < lowpass_height * 2; i++) {
794             horiz_filter_clip(dst, low, high, lowpass_width, s->bpc);
795             low  += lowpass_width;
796             high += lowpass_width;
797             dst  += pic->linesize[act_plane] / 2;
798         }
799     }
800
801
802 end:
803     if (ret < 0)
804         return ret;
805
806     *got_frame = 1;
807     return avpkt->size;
808 }
809
810 static av_cold int cfhd_close(AVCodecContext *avctx)
811 {
812     CFHDContext *s = avctx->priv_data;
813
814     free_buffers(s);
815
816     if (!avctx->internal->is_copy) {
817         ff_free_vlc(&s->vlc_9);
818         ff_free_vlc(&s->vlc_18);
819     }
820
821     return 0;
822 }
823
824 AVCodec ff_cfhd_decoder = {
825     .name             = "cfhd",
826     .long_name        = NULL_IF_CONFIG_SMALL("Cineform HD"),
827     .type             = AVMEDIA_TYPE_VIDEO,
828     .id               = AV_CODEC_ID_CFHD,
829     .priv_data_size   = sizeof(CFHDContext),
830     .init             = cfhd_init,
831     .close            = cfhd_close,
832     .decode           = cfhd_decode,
833     .capabilities     = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
834     .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
835 };