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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  * 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     s->peak.base   = NULL;
  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] = *(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    = (int16_t *) gb.buffer;
 541             s->peak.level   = 0;
 542         } else if (tag == -76) {
 543             s->peak.offset &= 0xffff;
 544             s->peak.offset |= (data & 0xffff)<<16;
 545             s->peak.base    = (int16_t *) gb.buffer;
 546             s->peak.level   = 0;
 547         } else if (tag == -74 && s->peak.offset) {
 548             s->peak.level = data;
 549             s->peak.base += s->peak.offset / 2 - 2;
 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                     if (s->peak.level)
 672                         peak_table(coeff_data - expected, &s->peak, expected);
 673                     if (s->difference_coding)
 674                         difference_coding(s->plane[s->channel_num].subband[s->subband_num_actual], highpass_width, highpass_height);
 675
 676                 } else {
 677                     while (1) {
 678                         UPDATE_CACHE(re, &s->gb);
 679                         GET_RL_VLC(level, run, re, &s->gb, s->table_18_rl_vlc,
 680                                    VLC_BITS, 3, 1);
 681
 682                         /* escape */
 683                         if (level == 255 && run == 2)
 684                             break;
 685
 686                         count += run;
 687
 688                         if (count > expected)
 689                             break;
 690
 691                         coeff = dequant_and_decompand(level, s->quantisation, s->codebook);
 692                         for (i = 0; i < run; i++)
 693                             *coeff_data++ = coeff;
 694                     }
 695                     if (s->peak.level)
 696                         peak_table(coeff_data - expected, &s->peak, expected);
 697                     if (s->difference_coding)
 698                         difference_coding(s->plane[s->channel_num].subband[s->subband_num_actual], highpass_width, highpass_height);
 699
 700                 }
 701                 CLOSE_READER(re, &s->gb);
 702             }
 703
 704             if (count > expected) {
 705                 av_log(avctx, AV_LOG_ERROR, "Escape codeword not found, probably corrupt data\n");
 706                 ret = AVERROR(EINVAL);
 707                 goto end;
 708             }
 709
 710             bytes = FFALIGN(AV_CEIL_RSHIFT(get_bits_count(&s->gb), 3), 4);
 711             if (bytes > bytestream2_get_bytes_left(&gb)) {
 712                 av_log(avctx, AV_LOG_ERROR, "Bitstream overread error\n");
 713                 ret = AVERROR(EINVAL);
 714                 goto end;
 715             } else
 716                 bytestream2_seek(&gb, bytes, SEEK_CUR);
 717
 718             av_log(avctx, AV_LOG_DEBUG, "End subband coeffs %i extra %i\n", count, count - expected);
 719             s->codebook = 0;
 720
 721             /* Copy last line of coefficients if odd height */
 722             if (highpass_height & 1) {
 723                 memcpy(&coeff_data[highpass_height * highpass_stride],
 724                        &coeff_data[(highpass_height - 1) * highpass_stride],
 725                        highpass_stride * sizeof(*coeff_data));
 726             }
 727         }
 728     }
 729
 730     if (!s->a_width || !s->a_height || s->a_format == AV_PIX_FMT_NONE ||
 731         s->coded_width || s->coded_height || s->coded_format != AV_PIX_FMT_NONE) {
 732         av_log(avctx, AV_LOG_ERROR, "Invalid dimensions\n");
 733         ret = AVERROR(EINVAL);
 734         goto end;
 735     }
 736
 737     if (!got_buffer) {
 738         av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 739         ret = AVERROR(EINVAL);
 740         goto end;
 741     }
 742
 743     planes = av_pix_fmt_count_planes(avctx->pix_fmt);
 744     for (plane = 0; plane < planes && !ret; plane++) {
 745         /* level 1 */
 746         int lowpass_height  = s->plane[plane].band[0][0].height;
 747         int lowpass_width   = s->plane[plane].band[0][0].width;
 748         int highpass_stride = s->plane[plane].band[0][1].stride;
 749         int act_plane = plane == 1 ? 2 : plane == 2 ? 1 : plane;
 750         int16_t *low, *high, *output, *dst;
 751
 752         if (lowpass_height > s->plane[plane].band[0][0].a_height || lowpass_width > s->plane[plane].band[0][0].a_width ||
 753             !highpass_stride || s->plane[plane].band[0][1].width > s->plane[plane].band[0][1].a_width) {
 754             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 755             ret = AVERROR(EINVAL);
 756             goto end;
 757         }
 758
 759         av_log(avctx, AV_LOG_DEBUG, "Decoding level 1 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 760
 761         low    = s->plane[plane].subband[0];
 762         high   = s->plane[plane].subband[2];
 763         output = s->plane[plane].l_h[0];
 764         for (i = 0; i < lowpass_width; i++) {
 765             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 766             low++;
 767             high++;
 768             output++;
 769         }
 770
 771         low    = s->plane[plane].subband[1];
 772         high   = s->plane[plane].subband[3];
 773         output = s->plane[plane].l_h[1];
 774
 775         for (i = 0; i < lowpass_width; i++) {
 776             // note the stride of "low" is highpass_stride
 777             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 778             low++;
 779             high++;
 780             output++;
 781         }
 782
 783         low    = s->plane[plane].l_h[0];
 784         high   = s->plane[plane].l_h[1];
 785         output = s->plane[plane].subband[0];
 786         for (i = 0; i < lowpass_height * 2; i++) {
 787             horiz_filter(output, low, high, lowpass_width);
 788             low    += lowpass_width;
 789             high   += lowpass_width;
 790             output += lowpass_width * 2;
 791         }
 792         if (s->bpc == 12) {
 793             output = s->plane[plane].subband[0];
 794             for (i = 0; i < lowpass_height * 2; i++) {
 795                 for (j = 0; j < lowpass_width * 2; j++)
 796                     output[j] *= 4;
 797
 798                 output += lowpass_width * 2;
 799             }
 800         }
 801
 802         /* level 2 */
 803         lowpass_height  = s->plane[plane].band[1][1].height;
 804         lowpass_width   = s->plane[plane].band[1][1].width;
 805         highpass_stride = s->plane[plane].band[1][1].stride;
 806
 807         if (lowpass_height > s->plane[plane].band[1][1].a_height || lowpass_width > s->plane[plane].band[1][1].a_width ||
 808             !highpass_stride || s->plane[plane].band[1][1].width > s->plane[plane].band[1][1].a_width) {
 809             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 810             ret = AVERROR(EINVAL);
 811             goto end;
 812         }
 813
 814         av_log(avctx, AV_LOG_DEBUG, "Level 2 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 815
 816         low    = s->plane[plane].subband[0];
 817         high   = s->plane[plane].subband[5];
 818         output = s->plane[plane].l_h[3];
 819         for (i = 0; i < lowpass_width; i++) {
 820             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 821             low++;
 822             high++;
 823             output++;
 824         }
 825
 826         low    = s->plane[plane].subband[4];
 827         high   = s->plane[plane].subband[6];
 828         output = s->plane[plane].l_h[4];
 829         for (i = 0; i < lowpass_width; i++) {
 830             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 831             low++;
 832             high++;
 833             output++;
 834         }
 835
 836         low    = s->plane[plane].l_h[3];
 837         high   = s->plane[plane].l_h[4];
 838         output = s->plane[plane].subband[0];
 839         for (i = 0; i < lowpass_height * 2; i++) {
 840             horiz_filter(output, low, high, lowpass_width);
 841             low    += lowpass_width;
 842             high   += lowpass_width;
 843             output += lowpass_width * 2;
 844         }
 845
 846         output = s->plane[plane].subband[0];
 847         for (i = 0; i < lowpass_height * 2; i++) {
 848             for (j = 0; j < lowpass_width * 2; j++)
 849                 output[j] *= 4;
 850
 851             output += lowpass_width * 2;
 852         }
 853
 854         /* level 3 */
 855         lowpass_height  = s->plane[plane].band[2][1].height;
 856         lowpass_width   = s->plane[plane].band[2][1].width;
 857         highpass_stride = s->plane[plane].band[2][1].stride;
 858
 859         if (lowpass_height > s->plane[plane].band[2][1].a_height || lowpass_width > s->plane[plane].band[2][1].a_width ||
 860             !highpass_stride || s->plane[plane].band[2][1].width > s->plane[plane].band[2][1].a_width) {
 861             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 862             ret = AVERROR(EINVAL);
 863             goto end;
 864         }
 865
 866         av_log(avctx, AV_LOG_DEBUG, "Level 3 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 867         if (s->progressive) {
 868             low    = s->plane[plane].subband[0];
 869             high   = s->plane[plane].subband[8];
 870             output = s->plane[plane].l_h[6];
 871             for (i = 0; i < lowpass_width; i++) {
 872                 vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 873                 low++;
 874                 high++;
 875                 output++;
 876             }
 877
 878             low    = s->plane[plane].subband[7];
 879             high   = s->plane[plane].subband[9];
 880             output = s->plane[plane].l_h[7];
 881             for (i = 0; i < lowpass_width; i++) {
 882                 vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 883                 low++;
 884                 high++;
 885                 output++;
 886             }
 887
 888             dst = (int16_t *)pic->data[act_plane];
 889             low  = s->plane[plane].l_h[6];
 890             high = s->plane[plane].l_h[7];
 891             for (i = 0; i < lowpass_height * 2; i++) {
 892                 horiz_filter_clip(dst, low, high, lowpass_width, s->bpc);
 893                 low  += lowpass_width;
 894                 high += lowpass_width;
 895                 dst  += pic->linesize[act_plane] / 2;
 896             }
 897         } else {
 898             av_log(avctx, AV_LOG_DEBUG, "interlaced frame ? %d", pic->interlaced_frame);
 899             pic->interlaced_frame = 1;
 900             low    = s->plane[plane].subband[0];
 901             high   = s->plane[plane].subband[7];
 902             output = s->plane[plane].l_h[6];
 903             for (i = 0; i < lowpass_height; i++) {
 904                 horiz_filter(output, low, high, lowpass_width);
 905                 low    += lowpass_width;
 906                 high   += lowpass_width;
 907                 output += lowpass_width * 2;
 908             }
 909
 910             low    = s->plane[plane].subband[8];
 911             high   = s->plane[plane].subband[9];
 912             output = s->plane[plane].l_h[7];
 913             for (i = 0; i < lowpass_height; i++) {
 914                 horiz_filter(output, low, high, lowpass_width);
 915                 low    += lowpass_width;
 916                 high   += lowpass_width;
 917                 output += lowpass_width * 2;
 918             }
 919
 920             dst  = (int16_t *)pic->data[act_plane];
 921             low  = s->plane[plane].l_h[6];
 922             high = s->plane[plane].l_h[7];
 923             for (i = 0; i < lowpass_height; i++) {
 924                 interlaced_vertical_filter(dst, low, high, lowpass_width * 2,  pic->linesize[act_plane]/2, act_plane);
 925                 low  += lowpass_width * 2;
 926                 high += lowpass_width * 2;
 927                 dst  += pic->linesize[act_plane];
 928             }
 929         }
 930     }
 931
 932
 933 end:
 934     if (ret < 0)
 935         return ret;
 936
 937     *got_frame = 1;
 938     return avpkt->size;
 939 }
 940
 941 static av_cold int cfhd_close(AVCodecContext *avctx)
 942 {
 943     CFHDContext *s = avctx->priv_data;
 944
 945     free_buffers(s);
 946
 947     if (!avctx->internal->is_copy) {
 948         ff_free_vlc(&s->vlc_9);
 949         ff_free_vlc(&s->vlc_18);
 950     }
 951
 952     return 0;
 953 }
 954
 955 AVCodec ff_cfhd_decoder = {
 956     .name             = "cfhd",
 957     .long_name        = NULL_IF_CONFIG_SMALL("Cineform HD"),
 958     .type             = AVMEDIA_TYPE_VIDEO,
 959     .id               = AV_CODEC_ID_CFHD,
 960     .priv_data_size   = sizeof(CFHDContext),
 961     .init             = cfhd_init,
 962     .close            = cfhd_close,
 963     .decode           = cfhd_decode,
 964     .capabilities     = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
 965     .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
 966 };