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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 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 };