1959762f0e56a7406691fd19979896d68dcd6aa8
[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 #define ALPHA_COMPAND_DC_OFFSET 256
41 #define ALPHA_COMPAND_GAIN 9400
42
43 enum CFHDParam {
44     ChannelCount     =  12,
45     SubbandCount     =  14,
46     ImageWidth       =  20,
47     ImageHeight      =  21,
48     LowpassPrecision =  35,
49     SubbandNumber    =  48,
50     Quantization     =  53,
51     ChannelNumber    =  62,
52     SampleFlags      =  68,
53     BitsPerComponent = 101,
54     ChannelWidth     = 104,
55     ChannelHeight    = 105,
56     PrescaleShift    = 109,
57 };
58
59
60
61 static av_cold int cfhd_init(AVCodecContext *avctx)
62 {
63     CFHDContext *s = avctx->priv_data;
64
65     avctx->bits_per_raw_sample = 10;
66     s->avctx                   = avctx;
67
68     return ff_cfhd_init_vlcs(s);
69 }
70
71 static void init_plane_defaults(CFHDContext *s)
72 {
73     s->subband_num        = 0;
74     s->level              = 0;
75     s->subband_num_actual = 0;
76 }
77
78 static void init_peak_table_defaults(CFHDContext *s)
79 {
80     s->peak.level  = 0;
81     s->peak.offset = 0;
82     memset(&s->peak.base, 0, sizeof(s->peak.base));
83 }
84
85 static void init_frame_defaults(CFHDContext *s)
86 {
87     s->coded_width       = 0;
88     s->coded_height      = 0;
89     s->cropped_height    = 0;
90     s->bpc               = 10;
91     s->channel_cnt       = 4;
92     s->subband_cnt       = SUBBAND_COUNT;
93     s->channel_num       = 0;
94     s->lowpass_precision = 16;
95     s->quantisation      = 1;
96     s->wavelet_depth     = 3;
97     s->pshift            = 1;
98     s->codebook          = 0;
99     s->difference_coding = 0;
100     s->progressive       = 0;
101     init_plane_defaults(s);
102     init_peak_table_defaults(s);
103 }
104
105 /* TODO: merge with VLC tables or use LUT */
106 static inline int dequant_and_decompand(int level, int quantisation, int codebook)
107 {
108     if (codebook == 0 || codebook == 1) {
109         int64_t abslevel = abs(level);
110         if (level < 264)
111             return (abslevel + ((768 * abslevel * abslevel * abslevel) / (255 * 255 * 255))) *
112                FFSIGN(level) * quantisation;
113         else
114             return level * quantisation;
115     } else
116         return level * quantisation;
117 }
118
119 static inline void difference_coding(int16_t *band, int width, int height)
120 {
121
122     int i,j;
123     for (i = 0; i < height; i++) {
124         for (j = 1; j < width; j++) {
125           band[j] += band[j-1];
126         }
127         band += width;
128     }
129 }
130
131 static inline void peak_table(int16_t *band, Peak *peak, int length)
132 {
133     int i;
134     for (i = 0; i < length; i++)
135         if (abs(band[i]) > peak->level)
136             band[i] = bytestream2_get_le16(&peak->base);
137 }
138
139 static inline void process_alpha(int16_t *alpha, int width)
140 {
141     int i, channel;
142     for (i = 0; i < width; i++) {
143         channel   = alpha[i];
144         channel  -= ALPHA_COMPAND_DC_OFFSET;
145         channel <<= 3;
146         channel  *= ALPHA_COMPAND_GAIN;
147         channel >>= 16;
148         channel   = av_clip_uintp2(channel, 12);
149         alpha[i]  = channel;
150     }
151 }
152
153 static inline void filter(int16_t *output, ptrdiff_t out_stride,
154                           int16_t *low, ptrdiff_t low_stride,
155                           int16_t *high, ptrdiff_t high_stride,
156                           int len, int clip)
157 {
158     int16_t tmp;
159     int i;
160
161     for (i = 0; i < len; i++) {
162         if (i == 0) {
163             tmp = (11*low[0*low_stride] - 4*low[1*low_stride] + low[2*low_stride] + 4) >> 3;
164             output[(2*i+0)*out_stride] = (tmp + high[0*high_stride]) >> 1;
165             if (clip)
166                 output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
167
168             tmp = ( 5*low[0*low_stride] + 4*low[1*low_stride] - low[2*low_stride] + 4) >> 3;
169             output[(2*i+1)*out_stride] = (tmp - high[0*high_stride]) >> 1;
170             if (clip)
171                 output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
172         } else if (i == len-1) {
173             tmp = ( 5*low[i*low_stride] + 4*low[(i-1)*low_stride] - low[(i-2)*low_stride] + 4) >> 3;
174             output[(2*i+0)*out_stride] = (tmp + high[i*high_stride]) >> 1;
175             if (clip)
176                 output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
177
178             tmp = (11*low[i*low_stride] - 4*low[(i-1)*low_stride] + low[(i-2)*low_stride] + 4) >> 3;
179             output[(2*i+1)*out_stride] = (tmp - high[i*high_stride]) >> 1;
180             if (clip)
181                 output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
182         } else {
183             tmp = (low[(i-1)*low_stride] - low[(i+1)*low_stride] + 4) >> 3;
184             output[(2*i+0)*out_stride] = (tmp + low[i*low_stride] + high[i*high_stride]) >> 1;
185             if (clip)
186                 output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
187
188             tmp = (low[(i+1)*low_stride] - low[(i-1)*low_stride] + 4) >> 3;
189             output[(2*i+1)*out_stride] = (tmp + low[i*low_stride] - high[i*high_stride]) >> 1;
190             if (clip)
191                 output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
192         }
193     }
194 }
195
196 static inline void interlaced_vertical_filter(int16_t *output, int16_t *low, int16_t *high,
197                          int width, int linesize, int plane)
198 {
199     int i;
200     int16_t even, odd;
201     for (i = 0; i < width; i++) {
202         even = (low[i] - high[i])/2;
203         odd  = (low[i] + high[i])/2;
204         output[i]            = av_clip_uintp2(even, 10);
205         output[i + linesize] = av_clip_uintp2(odd, 10);
206     }
207 }
208 static void horiz_filter(int16_t *output, int16_t *low, int16_t *high,
209                          int width)
210 {
211     filter(output, 1, low, 1, high, 1, width, 0);
212 }
213
214 static void horiz_filter_clip(int16_t *output, int16_t *low, int16_t *high,
215                               int width, int clip)
216 {
217     filter(output, 1, low, 1, high, 1, width, clip);
218 }
219
220 static void vert_filter(int16_t *output, ptrdiff_t out_stride,
221                         int16_t *low, ptrdiff_t low_stride,
222                         int16_t *high, ptrdiff_t high_stride, int len)
223 {
224     filter(output, out_stride, low, low_stride, high, high_stride, len, 0);
225 }
226
227 static void free_buffers(CFHDContext *s)
228 {
229     int i, j;
230
231     for (i = 0; i < FF_ARRAY_ELEMS(s->plane); i++) {
232         av_freep(&s->plane[i].idwt_buf);
233         av_freep(&s->plane[i].idwt_tmp);
234
235         for (j = 0; j < 9; j++)
236             s->plane[i].subband[j] = NULL;
237
238         for (j = 0; j < 8; j++)
239             s->plane[i].l_h[j] = NULL;
240     }
241     s->a_height = 0;
242     s->a_width  = 0;
243 }
244
245 static int alloc_buffers(AVCodecContext *avctx)
246 {
247     CFHDContext *s = avctx->priv_data;
248     int i, j, ret, planes;
249     int chroma_x_shift, chroma_y_shift;
250     unsigned k;
251
252     if ((ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height)) < 0)
253         return ret;
254     avctx->pix_fmt = s->coded_format;
255
256     if ((ret = av_pix_fmt_get_chroma_sub_sample(s->coded_format,
257                                                 &chroma_x_shift,
258                                                 &chroma_y_shift)) < 0)
259         return ret;
260     planes = av_pix_fmt_count_planes(s->coded_format);
261
262     for (i = 0; i < planes; i++) {
263         int w8, h8, w4, h4, w2, h2;
264         int width  = i ? avctx->width  >> chroma_x_shift : avctx->width;
265         int height = i ? avctx->height >> chroma_y_shift : avctx->height;
266         ptrdiff_t stride = FFALIGN(width  / 8, 8) * 8;
267         if (chroma_y_shift)
268             height = FFALIGN(height / 8, 2) * 8;
269         s->plane[i].width  = width;
270         s->plane[i].height = height;
271         s->plane[i].stride = stride;
272
273         w8 = FFALIGN(s->plane[i].width  / 8, 8);
274         h8 = height / 8;
275         w4 = w8 * 2;
276         h4 = h8 * 2;
277         w2 = w4 * 2;
278         h2 = h4 * 2;
279
280         s->plane[i].idwt_buf =
281             av_mallocz_array(height * stride, sizeof(*s->plane[i].idwt_buf));
282         s->plane[i].idwt_tmp =
283             av_malloc_array(height * stride, sizeof(*s->plane[i].idwt_tmp));
284         if (!s->plane[i].idwt_buf || !s->plane[i].idwt_tmp)
285             return AVERROR(ENOMEM);
286
287         s->plane[i].subband[0] = s->plane[i].idwt_buf;
288         s->plane[i].subband[1] = s->plane[i].idwt_buf + 2 * w8 * h8;
289         s->plane[i].subband[2] = s->plane[i].idwt_buf + 1 * w8 * h8;
290         s->plane[i].subband[3] = s->plane[i].idwt_buf + 3 * w8 * h8;
291         s->plane[i].subband[4] = s->plane[i].idwt_buf + 2 * w4 * h4;
292         s->plane[i].subband[5] = s->plane[i].idwt_buf + 1 * w4 * h4;
293         s->plane[i].subband[6] = s->plane[i].idwt_buf + 3 * w4 * h4;
294         s->plane[i].subband[7] = s->plane[i].idwt_buf + 2 * w2 * h2;
295         s->plane[i].subband[8] = s->plane[i].idwt_buf + 1 * w2 * h2;
296         s->plane[i].subband[9] = s->plane[i].idwt_buf + 3 * w2 * h2;
297
298         for (j = 0; j < DWT_LEVELS; j++) {
299             for (k = 0; k < FF_ARRAY_ELEMS(s->plane[i].band[j]); k++) {
300                 s->plane[i].band[j][k].a_width  = w8 << j;
301                 s->plane[i].band[j][k].a_height = h8 << j;
302             }
303         }
304
305         /* ll2 and ll1 commented out because they are done in-place */
306         s->plane[i].l_h[0] = s->plane[i].idwt_tmp;
307         s->plane[i].l_h[1] = s->plane[i].idwt_tmp + 2 * w8 * h8;
308         // s->plane[i].l_h[2] = ll2;
309         s->plane[i].l_h[3] = s->plane[i].idwt_tmp;
310         s->plane[i].l_h[4] = s->plane[i].idwt_tmp + 2 * w4 * h4;
311         // s->plane[i].l_h[5] = ll1;
312         s->plane[i].l_h[6] = s->plane[i].idwt_tmp;
313         s->plane[i].l_h[7] = s->plane[i].idwt_tmp + 2 * w2 * h2;
314     }
315
316     s->a_height = s->coded_height;
317     s->a_width  = s->coded_width;
318     s->a_format = s->coded_format;
319
320     return 0;
321 }
322
323 static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
324                        AVPacket *avpkt)
325 {
326     CFHDContext *s = avctx->priv_data;
327     GetByteContext gb;
328     ThreadFrame frame = { .f = data };
329     AVFrame *pic = data;
330     int ret = 0, i, j, planes, plane, got_buffer = 0;
331     int16_t *coeff_data;
332
333     s->coded_format = AV_PIX_FMT_YUV422P10;
334     init_frame_defaults(s);
335     planes = av_pix_fmt_count_planes(s->coded_format);
336
337     bytestream2_init(&gb, avpkt->data, avpkt->size);
338
339     while (bytestream2_get_bytes_left(&gb) > 4) {
340         /* Bit weird but implement the tag parsing as the spec says */
341         uint16_t tagu   = bytestream2_get_be16(&gb);
342         int16_t tag     = (int16_t)tagu;
343         int8_t tag8     = (int8_t)(tagu >> 8);
344         uint16_t abstag = abs(tag);
345         int8_t abs_tag8 = abs(tag8);
346         uint16_t data   = bytestream2_get_be16(&gb);
347         if (abs_tag8 >= 0x60 && abs_tag8 <= 0x6f) {
348             av_log(avctx, AV_LOG_DEBUG, "large len %x\n", ((tagu & 0xff) << 16) | data);
349         } else if (tag == SampleFlags) {
350             av_log(avctx, AV_LOG_DEBUG, "Progressive?%"PRIu16"\n", data);
351             s->progressive = data & 0x0001;
352         } else if (tag == ImageWidth) {
353             av_log(avctx, AV_LOG_DEBUG, "Width %"PRIu16"\n", data);
354             s->coded_width = data;
355         } else if (tag == ImageHeight) {
356             av_log(avctx, AV_LOG_DEBUG, "Height %"PRIu16"\n", data);
357             s->coded_height = data;
358         } else if (tag == 101) {
359             av_log(avctx, AV_LOG_DEBUG, "Bits per component: %"PRIu16"\n", data);
360             if (data < 1 || data > 31) {
361                 av_log(avctx, AV_LOG_ERROR, "Bits per component %d is invalid\n", data);
362                 ret = AVERROR(EINVAL);
363                 break;
364             }
365             s->bpc = data;
366         } else if (tag == ChannelCount) {
367             av_log(avctx, AV_LOG_DEBUG, "Channel Count: %"PRIu16"\n", data);
368             s->channel_cnt = data;
369             if (data > 4) {
370                 av_log(avctx, AV_LOG_ERROR, "Channel Count of %"PRIu16" is unsupported\n", data);
371                 ret = AVERROR_PATCHWELCOME;
372                 break;
373             }
374         } else if (tag == SubbandCount) {
375             av_log(avctx, AV_LOG_DEBUG, "Subband Count: %"PRIu16"\n", data);
376             if (data != SUBBAND_COUNT) {
377                 av_log(avctx, AV_LOG_ERROR, "Subband Count of %"PRIu16" is unsupported\n", data);
378                 ret = AVERROR_PATCHWELCOME;
379                 break;
380             }
381         } else if (tag == ChannelNumber) {
382             s->channel_num = data;
383             av_log(avctx, AV_LOG_DEBUG, "Channel number %"PRIu16"\n", data);
384             if (s->channel_num >= planes) {
385                 av_log(avctx, AV_LOG_ERROR, "Invalid channel number\n");
386                 ret = AVERROR(EINVAL);
387                 break;
388             }
389             init_plane_defaults(s);
390         } else if (tag == SubbandNumber) {
391             if (s->subband_num != 0 && data == 1)  // hack
392                 s->level++;
393             av_log(avctx, AV_LOG_DEBUG, "Subband number %"PRIu16"\n", data);
394             s->subband_num = data;
395             if (s->level >= DWT_LEVELS) {
396                 av_log(avctx, AV_LOG_ERROR, "Invalid level\n");
397                 ret = AVERROR(EINVAL);
398                 break;
399             }
400             if (s->subband_num > 3) {
401                 av_log(avctx, AV_LOG_ERROR, "Invalid subband number\n");
402                 ret = AVERROR(EINVAL);
403                 break;
404             }
405         } else if (tag == 51) {
406             av_log(avctx, AV_LOG_DEBUG, "Subband number actual %"PRIu16"\n", data);
407             s->subband_num_actual = data;
408             if (s->subband_num_actual >= 10) {
409                 av_log(avctx, AV_LOG_ERROR, "Invalid subband number actual\n");
410                 ret = AVERROR(EINVAL);
411                 break;
412             }
413         } else if (tag == LowpassPrecision)
414             av_log(avctx, AV_LOG_DEBUG, "Lowpass precision bits: %"PRIu16"\n", data);
415         else if (tag == Quantization) {
416             s->quantisation = data;
417             av_log(avctx, AV_LOG_DEBUG, "Quantisation: %"PRIu16"\n", data);
418         } else if (tag == PrescaleShift) {
419             s->prescale_shift[0] = (data >> 0) & 0x7;
420             s->prescale_shift[1] = (data >> 3) & 0x7;
421             s->prescale_shift[2] = (data >> 6) & 0x7;
422             av_log(avctx, AV_LOG_DEBUG, "Prescale shift (VC-5): %x\n", data);
423         } else if (tag == 27) {
424             av_log(avctx, AV_LOG_DEBUG, "Lowpass width %"PRIu16"\n", data);
425             if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_width) {
426                 av_log(avctx, AV_LOG_ERROR, "Invalid lowpass width\n");
427                 ret = AVERROR(EINVAL);
428                 break;
429             }
430             s->plane[s->channel_num].band[0][0].width  = data;
431             s->plane[s->channel_num].band[0][0].stride = data;
432         } else if (tag == 28) {
433             av_log(avctx, AV_LOG_DEBUG, "Lowpass height %"PRIu16"\n", data);
434             if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_height) {
435                 av_log(avctx, AV_LOG_ERROR, "Invalid lowpass height\n");
436                 ret = AVERROR(EINVAL);
437                 break;
438             }
439             s->plane[s->channel_num].band[0][0].height = data;
440         } else if (tag == 1)
441             av_log(avctx, AV_LOG_DEBUG, "Sample type? %"PRIu16"\n", data);
442         else if (tag == 10) {
443             if (data != 0) {
444                 avpriv_report_missing_feature(avctx, "Transform type of %"PRIu16, data);
445                 ret = AVERROR_PATCHWELCOME;
446                 break;
447             }
448             av_log(avctx, AV_LOG_DEBUG, "Transform-type? %"PRIu16"\n", data);
449         } else if (abstag >= 0x4000 && abstag <= 0x40ff) {
450             if (abstag == 0x4001)
451                 s->peak.level = 0;
452             av_log(avctx, AV_LOG_DEBUG, "Small chunk length %d %s\n", data * 4, tag < 0 ? "optional" : "required");
453             bytestream2_skipu(&gb, data * 4);
454         } else if (tag == 23) {
455             av_log(avctx, AV_LOG_DEBUG, "Skip frame\n");
456             avpriv_report_missing_feature(avctx, "Skip frame");
457             ret = AVERROR_PATCHWELCOME;
458             break;
459         } else if (tag == 2) {
460             av_log(avctx, AV_LOG_DEBUG, "tag=2 header - skipping %i tag/value pairs\n", data);
461             if (data > bytestream2_get_bytes_left(&gb) / 4) {
462                 av_log(avctx, AV_LOG_ERROR, "too many tag/value pairs (%d)\n", data);
463                 ret = AVERROR_INVALIDDATA;
464                 break;
465             }
466             for (i = 0; i < data; i++) {
467                 uint16_t tag2 = bytestream2_get_be16(&gb);
468                 uint16_t val2 = bytestream2_get_be16(&gb);
469                 av_log(avctx, AV_LOG_DEBUG, "Tag/Value = %x %x\n", tag2, val2);
470             }
471         } else if (tag == 41) {
472             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);
473             if (data < 3) {
474                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass width\n");
475                 ret = AVERROR(EINVAL);
476                 break;
477             }
478             s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;
479             s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
480         } else if (tag == 42) {
481             av_log(avctx, AV_LOG_DEBUG, "Highpass height %i\n", data);
482             if (data < 3) {
483                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass height\n");
484                 ret = AVERROR(EINVAL);
485                 break;
486             }
487             s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
488         } else if (tag == 49) {
489             av_log(avctx, AV_LOG_DEBUG, "Highpass width2 %i\n", data);
490             if (data < 3) {
491                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass width2\n");
492                 ret = AVERROR(EINVAL);
493                 break;
494             }
495             s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;
496             s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
497         } else if (tag == 50) {
498             av_log(avctx, AV_LOG_DEBUG, "Highpass height2 %i\n", data);
499             if (data < 3) {
500                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass height2\n");
501                 ret = AVERROR(EINVAL);
502                 break;
503             }
504             s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
505         } else if (tag == 71) {
506             s->codebook = data;
507             av_log(avctx, AV_LOG_DEBUG, "Codebook %i\n", s->codebook);
508         } else if (tag == 72) {
509             s->codebook = data & 0xf;
510             s->difference_coding = (data >> 4) & 1;
511             av_log(avctx, AV_LOG_DEBUG, "Other codebook? %i\n", s->codebook);
512         } else if (tag == 70) {
513             av_log(avctx, AV_LOG_DEBUG, "Subsampling or bit-depth flag? %i\n", data);
514             if (!(data == 10 || data == 12)) {
515                 av_log(avctx, AV_LOG_ERROR, "Invalid bits per channel\n");
516                 ret = AVERROR(EINVAL);
517                 break;
518             }
519             s->bpc = data;
520         } else if (tag == 84) {
521             av_log(avctx, AV_LOG_DEBUG, "Sample format? %i\n", data);
522             if (data == 1)
523                 s->coded_format = AV_PIX_FMT_YUV422P10;
524             else if (data == 3)
525                 s->coded_format = AV_PIX_FMT_GBRP12;
526             else if (data == 4)
527                 s->coded_format = AV_PIX_FMT_GBRAP12;
528             else {
529                 avpriv_report_missing_feature(avctx, "Sample format of %"PRIu16, data);
530                 ret = AVERROR_PATCHWELCOME;
531                 break;
532             }
533             planes = av_pix_fmt_count_planes(s->coded_format);
534         } else if (tag == -85) {
535             av_log(avctx, AV_LOG_DEBUG, "Cropped height %"PRIu16"\n", data);
536             s->cropped_height = data;
537         } else if (tag == -75) {
538             s->peak.offset &= ~0xffff;
539             s->peak.offset |= (data & 0xffff);
540             s->peak.base    = gb;
541             s->peak.level   = 0;
542         } else if (tag == -76) {
543             s->peak.offset &= 0xffff;
544             s->peak.offset |= (data & 0xffffU)<<16;
545             s->peak.base    = gb;
546             s->peak.level   = 0;
547         } else if (tag == -74 && s->peak.offset) {
548             s->peak.level = data;
549             bytestream2_seek(&s->peak.base, s->peak.offset - 4, SEEK_CUR);
550         } else
551             av_log(avctx, AV_LOG_DEBUG,  "Unknown tag %i data %x\n", tag, data);
552
553         /* Some kind of end of header tag */
554         if (tag == 4 && data == 0x1a4a && s->coded_width && s->coded_height &&
555             s->coded_format != AV_PIX_FMT_NONE) {
556             if (s->a_width != s->coded_width || s->a_height != s->coded_height ||
557                 s->a_format != s->coded_format) {
558                 free_buffers(s);
559                 if ((ret = alloc_buffers(avctx)) < 0) {
560                     free_buffers(s);
561                     return ret;
562                 }
563             }
564             ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height);
565             if (ret < 0)
566                 return ret;
567             if (s->cropped_height)
568                 avctx->height = s->cropped_height;
569             frame.f->width =
570             frame.f->height = 0;
571
572             if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
573                 return ret;
574
575             s->coded_width = 0;
576             s->coded_height = 0;
577             s->coded_format = AV_PIX_FMT_NONE;
578             got_buffer = 1;
579         }
580         coeff_data = s->plane[s->channel_num].subband[s->subband_num_actual];
581
582         /* Lowpass coefficients */
583         if (tag == 4 && data == 0xf0f && s->a_width && s->a_height) {
584             int lowpass_height = s->plane[s->channel_num].band[0][0].height;
585             int lowpass_width  = s->plane[s->channel_num].band[0][0].width;
586             int lowpass_a_height = s->plane[s->channel_num].band[0][0].a_height;
587             int lowpass_a_width  = s->plane[s->channel_num].band[0][0].a_width;
588
589             if (!got_buffer) {
590                 av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
591                 ret = AVERROR(EINVAL);
592                 goto end;
593             }
594
595             if (lowpass_height > lowpass_a_height || lowpass_width > lowpass_a_width ||
596                 lowpass_a_width * lowpass_a_height * sizeof(int16_t) > bytestream2_get_bytes_left(&gb)) {
597                 av_log(avctx, AV_LOG_ERROR, "Too many lowpass coefficients\n");
598                 ret = AVERROR(EINVAL);
599                 goto end;
600             }
601
602             av_log(avctx, AV_LOG_DEBUG, "Start of lowpass coeffs component %d height:%d, width:%d\n", s->channel_num, lowpass_height, lowpass_width);
603             for (i = 0; i < lowpass_height; i++) {
604                 for (j = 0; j < lowpass_width; j++)
605                     coeff_data[j] = bytestream2_get_be16u(&gb);
606
607                 coeff_data += lowpass_width;
608             }
609
610             /* Align to mod-4 position to continue reading tags */
611             bytestream2_seek(&gb, bytestream2_tell(&gb) & 3, SEEK_CUR);
612
613             /* Copy last line of coefficients if odd height */
614             if (lowpass_height & 1) {
615                 memcpy(&coeff_data[lowpass_height * lowpass_width],
616                        &coeff_data[(lowpass_height - 1) * lowpass_width],
617                        lowpass_width * sizeof(*coeff_data));
618             }
619
620             av_log(avctx, AV_LOG_DEBUG, "Lowpass coefficients %d\n", lowpass_width * lowpass_height);
621         }
622
623         if (tag == 55 && s->subband_num_actual != 255 && s->a_width && s->a_height) {
624             int highpass_height = s->plane[s->channel_num].band[s->level][s->subband_num].height;
625             int highpass_width  = s->plane[s->channel_num].band[s->level][s->subband_num].width;
626             int highpass_a_width = s->plane[s->channel_num].band[s->level][s->subband_num].a_width;
627             int highpass_a_height = s->plane[s->channel_num].band[s->level][s->subband_num].a_height;
628             int highpass_stride = s->plane[s->channel_num].band[s->level][s->subband_num].stride;
629             int expected;
630             int a_expected = highpass_a_height * highpass_a_width;
631             int level, run, coeff;
632             int count = 0, bytes;
633
634             if (!got_buffer) {
635                 av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
636                 ret = AVERROR(EINVAL);
637                 goto end;
638             }
639
640             if (highpass_height > highpass_a_height || highpass_width > highpass_a_width || a_expected < highpass_height * (uint64_t)highpass_stride) {
641                 av_log(avctx, AV_LOG_ERROR, "Too many highpass coefficients\n");
642                 ret = AVERROR(EINVAL);
643                 goto end;
644             }
645             expected = highpass_height * highpass_stride;
646
647             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);
648
649             init_get_bits(&s->gb, gb.buffer, bytestream2_get_bytes_left(&gb) * 8);
650             {
651                 OPEN_READER(re, &s->gb);
652                 if (!s->codebook) {
653                     while (1) {
654                         UPDATE_CACHE(re, &s->gb);
655                         GET_RL_VLC(level, run, re, &s->gb, s->table_9_rl_vlc,
656                                    VLC_BITS, 3, 1);
657
658                         /* escape */
659                         if (level == 64)
660                             break;
661
662                         count += run;
663
664                         if (count > expected)
665                             break;
666
667                         coeff = dequant_and_decompand(level, s->quantisation, 0);
668                         for (i = 0; i < run; i++)
669                             *coeff_data++ = coeff;
670                     }
671                 } else {
672                     while (1) {
673                         UPDATE_CACHE(re, &s->gb);
674                         GET_RL_VLC(level, run, re, &s->gb, s->table_18_rl_vlc,
675                                    VLC_BITS, 3, 1);
676
677                         /* escape */
678                         if (level == 255 && run == 2)
679                             break;
680
681                         count += run;
682
683                         if (count > expected)
684                             break;
685
686                         coeff = dequant_and_decompand(level, s->quantisation, s->codebook);
687                         for (i = 0; i < run; i++)
688                             *coeff_data++ = coeff;
689                     }
690                 }
691                 CLOSE_READER(re, &s->gb);
692             }
693
694             if (count > expected) {
695                 av_log(avctx, AV_LOG_ERROR, "Escape codeword not found, probably corrupt data\n");
696                 ret = AVERROR(EINVAL);
697                 goto end;
698             }
699             if (s->peak.level)
700                 peak_table(coeff_data - expected, &s->peak, expected);
701             if (s->difference_coding)
702                 difference_coding(s->plane[s->channel_num].subband[s->subband_num_actual], highpass_width, highpass_height);
703
704             bytes = FFALIGN(AV_CEIL_RSHIFT(get_bits_count(&s->gb), 3), 4);
705             if (bytes > bytestream2_get_bytes_left(&gb)) {
706                 av_log(avctx, AV_LOG_ERROR, "Bitstream overread error\n");
707                 ret = AVERROR(EINVAL);
708                 goto end;
709             } else
710                 bytestream2_seek(&gb, bytes, SEEK_CUR);
711
712             av_log(avctx, AV_LOG_DEBUG, "End subband coeffs %i extra %i\n", count, count - expected);
713             s->codebook = 0;
714
715             /* Copy last line of coefficients if odd height */
716             if (highpass_height & 1) {
717                 memcpy(&coeff_data[highpass_height * highpass_stride],
718                        &coeff_data[(highpass_height - 1) * highpass_stride],
719                        highpass_stride * sizeof(*coeff_data));
720             }
721         }
722     }
723
724     if (!s->a_width || !s->a_height || s->a_format == AV_PIX_FMT_NONE ||
725         s->coded_width || s->coded_height || s->coded_format != AV_PIX_FMT_NONE) {
726         av_log(avctx, AV_LOG_ERROR, "Invalid dimensions\n");
727         ret = AVERROR(EINVAL);
728         goto end;
729     }
730
731     if (!got_buffer) {
732         av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
733         ret = AVERROR(EINVAL);
734         goto end;
735     }
736
737     planes = av_pix_fmt_count_planes(avctx->pix_fmt);
738     for (plane = 0; plane < planes && !ret; plane++) {
739         /* level 1 */
740         int lowpass_height  = s->plane[plane].band[0][0].height;
741         int lowpass_width   = s->plane[plane].band[0][0].width;
742         int highpass_stride = s->plane[plane].band[0][1].stride;
743         int act_plane = plane == 1 ? 2 : plane == 2 ? 1 : plane;
744         int16_t *low, *high, *output, *dst;
745
746         if (lowpass_height > s->plane[plane].band[0][0].a_height || lowpass_width > s->plane[plane].band[0][0].a_width ||
747             !highpass_stride || s->plane[plane].band[0][1].width > s->plane[plane].band[0][1].a_width) {
748             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
749             ret = AVERROR(EINVAL);
750             goto end;
751         }
752
753         av_log(avctx, AV_LOG_DEBUG, "Decoding level 1 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
754
755         low    = s->plane[plane].subband[0];
756         high   = s->plane[plane].subband[2];
757         output = s->plane[plane].l_h[0];
758         for (i = 0; i < lowpass_width; i++) {
759             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
760             low++;
761             high++;
762             output++;
763         }
764
765         low    = s->plane[plane].subband[1];
766         high   = s->plane[plane].subband[3];
767         output = s->plane[plane].l_h[1];
768
769         for (i = 0; i < lowpass_width; i++) {
770             // note the stride of "low" is highpass_stride
771             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
772             low++;
773             high++;
774             output++;
775         }
776
777         low    = s->plane[plane].l_h[0];
778         high   = s->plane[plane].l_h[1];
779         output = s->plane[plane].subband[0];
780         for (i = 0; i < lowpass_height * 2; i++) {
781             horiz_filter(output, low, high, lowpass_width);
782             low    += lowpass_width;
783             high   += lowpass_width;
784             output += lowpass_width * 2;
785         }
786         if (s->bpc == 12) {
787             output = s->plane[plane].subband[0];
788             for (i = 0; i < lowpass_height * 2; i++) {
789                 for (j = 0; j < lowpass_width * 2; j++)
790                     output[j] *= 4;
791
792                 output += lowpass_width * 2;
793             }
794         }
795
796         /* level 2 */
797         lowpass_height  = s->plane[plane].band[1][1].height;
798         lowpass_width   = s->plane[plane].band[1][1].width;
799         highpass_stride = s->plane[plane].band[1][1].stride;
800
801         if (lowpass_height > s->plane[plane].band[1][1].a_height || lowpass_width > s->plane[plane].band[1][1].a_width ||
802             !highpass_stride || s->plane[plane].band[1][1].width > s->plane[plane].band[1][1].a_width) {
803             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
804             ret = AVERROR(EINVAL);
805             goto end;
806         }
807
808         av_log(avctx, AV_LOG_DEBUG, "Level 2 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
809
810         low    = s->plane[plane].subband[0];
811         high   = s->plane[plane].subband[5];
812         output = s->plane[plane].l_h[3];
813         for (i = 0; i < lowpass_width; i++) {
814             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
815             low++;
816             high++;
817             output++;
818         }
819
820         low    = s->plane[plane].subband[4];
821         high   = s->plane[plane].subband[6];
822         output = s->plane[plane].l_h[4];
823         for (i = 0; i < lowpass_width; i++) {
824             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
825             low++;
826             high++;
827             output++;
828         }
829
830         low    = s->plane[plane].l_h[3];
831         high   = s->plane[plane].l_h[4];
832         output = s->plane[plane].subband[0];
833         for (i = 0; i < lowpass_height * 2; i++) {
834             horiz_filter(output, low, high, lowpass_width);
835             low    += lowpass_width;
836             high   += lowpass_width;
837             output += lowpass_width * 2;
838         }
839
840         output = s->plane[plane].subband[0];
841         for (i = 0; i < lowpass_height * 2; i++) {
842             for (j = 0; j < lowpass_width * 2; j++)
843                 output[j] *= 4;
844
845             output += lowpass_width * 2;
846         }
847
848         /* level 3 */
849         lowpass_height  = s->plane[plane].band[2][1].height;
850         lowpass_width   = s->plane[plane].band[2][1].width;
851         highpass_stride = s->plane[plane].band[2][1].stride;
852
853         if (lowpass_height > s->plane[plane].band[2][1].a_height || lowpass_width > s->plane[plane].band[2][1].a_width ||
854             !highpass_stride || s->plane[plane].band[2][1].width > s->plane[plane].band[2][1].a_width) {
855             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
856             ret = AVERROR(EINVAL);
857             goto end;
858         }
859
860         av_log(avctx, AV_LOG_DEBUG, "Level 3 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
861         if (s->progressive) {
862             low    = s->plane[plane].subband[0];
863             high   = s->plane[plane].subband[8];
864             output = s->plane[plane].l_h[6];
865             for (i = 0; i < lowpass_width; i++) {
866                 vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
867                 low++;
868                 high++;
869                 output++;
870             }
871
872             low    = s->plane[plane].subband[7];
873             high   = s->plane[plane].subband[9];
874             output = s->plane[plane].l_h[7];
875             for (i = 0; i < lowpass_width; i++) {
876                 vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
877                 low++;
878                 high++;
879                 output++;
880             }
881
882             dst = (int16_t *)pic->data[act_plane];
883             low  = s->plane[plane].l_h[6];
884             high = s->plane[plane].l_h[7];
885             for (i = 0; i < lowpass_height * 2; i++) {
886                 horiz_filter_clip(dst, low, high, lowpass_width, s->bpc);
887                 low  += lowpass_width;
888                 high += lowpass_width;
889                 dst  += pic->linesize[act_plane] / 2;
890             }
891         } else {
892             av_log(avctx, AV_LOG_DEBUG, "interlaced frame ? %d", pic->interlaced_frame);
893             pic->interlaced_frame = 1;
894             low    = s->plane[plane].subband[0];
895             high   = s->plane[plane].subband[7];
896             output = s->plane[plane].l_h[6];
897             for (i = 0; i < lowpass_height; i++) {
898                 horiz_filter(output, low, high, lowpass_width);
899                 low    += lowpass_width;
900                 high   += lowpass_width;
901                 output += lowpass_width * 2;
902             }
903
904             low    = s->plane[plane].subband[8];
905             high   = s->plane[plane].subband[9];
906             output = s->plane[plane].l_h[7];
907             for (i = 0; i < lowpass_height; i++) {
908                 horiz_filter(output, low, high, lowpass_width);
909                 low    += lowpass_width;
910                 high   += lowpass_width;
911                 output += lowpass_width * 2;
912             }
913
914             dst  = (int16_t *)pic->data[act_plane];
915             low  = s->plane[plane].l_h[6];
916             high = s->plane[plane].l_h[7];
917             for (i = 0; i < lowpass_height; i++) {
918                 interlaced_vertical_filter(dst, low, high, lowpass_width * 2,  pic->linesize[act_plane]/2, act_plane);
919                 low  += lowpass_width * 2;
920                 high += lowpass_width * 2;
921                 dst  += pic->linesize[act_plane];
922             }
923         }
924     }
925
926
927 end:
928     if (ret < 0)
929         return ret;
930
931     *got_frame = 1;
932     return avpkt->size;
933 }
934
935 static av_cold int cfhd_close(AVCodecContext *avctx)
936 {
937     CFHDContext *s = avctx->priv_data;
938
939     free_buffers(s);
940
941     if (!avctx->internal->is_copy) {
942         ff_free_vlc(&s->vlc_9);
943         ff_free_vlc(&s->vlc_18);
944     }
945
946     return 0;
947 }
948
949 AVCodec ff_cfhd_decoder = {
950     .name             = "cfhd",
951     .long_name        = NULL_IF_CONFIG_SMALL("Cineform HD"),
952     .type             = AVMEDIA_TYPE_VIDEO,
953     .id               = AV_CODEC_ID_CFHD,
954     .priv_data_size   = sizeof(CFHDContext),
955     .init             = cfhd_init,
956     .close            = cfhd_close,
957     .decode           = cfhd_decode,
958     .capabilities     = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
959     .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
960 };