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   1 /*
   2  * Copyright (c) 2015-2016 Kieran Kunhya <kieran@kunhya.com>
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 /**
  22  * @file
  23  * CFHD Video Decoder
  24  */
  25
  26 #include "libavutil/buffer.h"
  27 #include "libavutil/common.h"
  28 #include "libavutil/intreadwrite.h"
  29 #include "libavutil/imgutils.h"
  30 #include "libavutil/opt.h"
  31
  32 #include "avcodec.h"
  33 #include "internal.h"
  34 #include "bytestream.h"
  35 #include "thread.h"
  36 #include "cfhd.h"
  37
  38 #define SUBBAND_COUNT 10
  39
  40 static av_cold int cfhd_decode_init(AVCodecContext *avctx)
  41 {
  42     CFHDContext *s = avctx->priv_data;
  43
  44     avctx->bits_per_raw_sample = 10;
  45     s->avctx                   = avctx;
  46
  47     return ff_cfhd_init_vlcs(s);
  48 }
  49
  50 static void init_plane_defaults(CFHDContext *s)
  51 {
  52     s->subband_num        = 0;
  53     s->level              = 0;
  54     s->subband_num_actual = 0;
  55 }
  56
  57 static void init_frame_defaults(CFHDContext *s)
  58 {
  59     s->coded_width       = 0;
  60     s->coded_height      = 0;
  61     s->bpc               = 10;
  62     s->channel_cnt       = 4;
  63     s->subband_cnt       = 10;
  64     s->channel_num       = 0;
  65     s->lowpass_precision = 16;
  66     s->quantisation      = 1;
  67     s->wavelet_depth     = 3;
  68     s->pshift            = 1;
  69     s->codebook          = 0;
  70     init_plane_defaults(s);
  71 }
  72
  73 /* TODO: merge with VLC tables or use LUT */
  74 static inline int dequant_and_decompand(int level, int quantisation)
  75 {
  76     int64_t abslevel = abs(level);
  77     return (abslevel + ((768 * abslevel * abslevel * abslevel) / (255 * 255 * 255))) * FFSIGN(level) * quantisation;
  78 }
  79
  80 static inline void filter(int16_t *output, ptrdiff_t out_stride, int16_t *low, ptrdiff_t low_stride,
  81                           int16_t *high, ptrdiff_t high_stride, int len, uint8_t clip)
  82 {
  83     int16_t tmp;
  84
  85     int i;
  86     for (i = 0; i < len; i++) {
  87         if (i == 0) {
  88             tmp = (11*low[0*low_stride] - 4*low[1*low_stride] + low[2*low_stride] + 4) >> 3;
  89             output[(2*i+0)*out_stride] = (tmp + high[0*high_stride]) >> 1;
  90             if (clip)
  91                 output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
  92
  93             tmp = ( 5*low[0*low_stride] + 4*low[1*low_stride] - low[2*low_stride] + 4) >> 3;
  94             output[(2*i+1)*out_stride] = (tmp - high[0*high_stride]) >> 1;
  95             if (clip)
  96                 output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
  97         } else if (i == len-1) {
  98             tmp = ( 5*low[i*low_stride] + 4*low[(i-1)*low_stride] - low[(i-2)*low_stride] + 4) >> 3;
  99             output[(2*i+0)*out_stride] = (tmp + high[i*high_stride]) >> 1;
 100             if (clip)
 101                 output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
 102
 103             tmp = (11*low[i*low_stride] - 4*low[(i-1)*low_stride] + low[(i-2)*low_stride] + 4) >> 3;
 104             output[(2*i+1)*out_stride] = (tmp - high[i*high_stride]) >> 1;
 105             if (clip)
 106                 output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
 107         } else {
 108             tmp = (low[(i-1)*low_stride] - low[(i+1)*low_stride] + 4) >> 3;
 109             output[(2*i+0)*out_stride] = (tmp + low[i*low_stride] + high[i*high_stride]) >> 1;
 110             if (clip)
 111                 output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
 112
 113             tmp = (low[(i+1)*low_stride] - low[(i-1)*low_stride] + 4) >> 3;
 114             output[(2*i+1)*out_stride] = (tmp + low[i*low_stride] - high[i*high_stride]) >> 1;
 115             if (clip)
 116                 output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
 117         }
 118     }
 119 }
 120
 121 static void horiz_filter(int16_t *output, int16_t *low, int16_t *high, int width)
 122 {
 123     filter(output, 1, low, 1, high, 1, width, 0);
 124 }
 125
 126 static void horiz_filter_clip(int16_t *output, int16_t *low, int16_t *high, int width, uint8_t clip)
 127 {
 128     filter(output, 1, low, 1, high, 1, width, clip);
 129 }
 130
 131 static void vert_filter(int16_t *output, int out_stride, int16_t *low, int low_stride,
 132                         int16_t *high, int high_stride, int len)
 133 {
 134     filter(output, out_stride, low, low_stride, high, high_stride, len, 0);
 135 }
 136
 137 static void free_buffers(AVCodecContext *avctx)
 138 {
 139     CFHDContext *s = avctx->priv_data;
 140     int i, j;
 141
 142     for (i = 0; i < 4; i++) {
 143         av_freep(&s->plane[i].idwt_buf);
 144         av_freep(&s->plane[i].idwt_tmp);
 145
 146         for (j = 0; j < 9; j++)
 147             s->plane[i].subband[j] = NULL;
 148
 149         for (j = 0; j < 8; j++)
 150             s->plane[i].l_h[j] = NULL;
 151     }
 152     s->a_height = 0;
 153     s->a_width  = 0;
 154 }
 155
 156 static int alloc_buffers(AVCodecContext *avctx)
 157 {
 158     CFHDContext *s = avctx->priv_data;
 159     int i, j, k, ret, planes;
 160
 161     if ((ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height)) < 0)
 162         return ret;
 163     avctx->pix_fmt = s->coded_format;
 164
 165     avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_x_shift, &s->chroma_y_shift);
 166     planes = av_pix_fmt_count_planes(avctx->pix_fmt);
 167
 168     for (i = 0; i < planes; i++) {
 169         int width = i ? avctx->width >> s->chroma_x_shift : avctx->width;
 170         int height = i ? avctx->height >> s->chroma_y_shift : avctx->height;
 171         int stride = FFALIGN(width / 8, 8) * 8;
 172         int w8, h8, w4, h4, w2, h2;
 173         height = FFALIGN(height / 8, 2) * 8;
 174         s->plane[i].width = width;
 175         s->plane[i].height = height;
 176         s->plane[i].stride = stride;
 177
 178         w8 = FFALIGN(s->plane[i].width / 8, 8);
 179         h8 = FFALIGN(s->plane[i].height / 8, 2);
 180         w4 = w8 * 2;
 181         h4 = h8 * 2;
 182         w2 = w4 * 2;
 183         h2 = h4 * 2;
 184
 185         s->plane[i].idwt_buf = av_mallocz_array(height * stride, sizeof(*s->plane[i].idwt_buf));
 186         s->plane[i].idwt_tmp = av_malloc_array(height * stride, sizeof(*s->plane[i].idwt_tmp));
 187         if (!s->plane[i].idwt_buf || !s->plane[i].idwt_tmp) {
 188             return AVERROR(ENOMEM);
 189         }
 190
 191         s->plane[i].subband[0] = s->plane[i].idwt_buf;
 192         s->plane[i].subband[1] = s->plane[i].idwt_buf + 2 * w8 * h8;
 193         s->plane[i].subband[2] = s->plane[i].idwt_buf + 1 * w8 * h8;
 194         s->plane[i].subband[3] = s->plane[i].idwt_buf + 3 * w8 * h8;
 195         s->plane[i].subband[4] = s->plane[i].idwt_buf + 2 * w4 * h4;
 196         s->plane[i].subband[5] = s->plane[i].idwt_buf + 1 * w4 * h4;
 197         s->plane[i].subband[6] = s->plane[i].idwt_buf + 3 * w4 * h4;
 198         s->plane[i].subband[7] = s->plane[i].idwt_buf + 2 * w2 * h2;
 199         s->plane[i].subband[8] = s->plane[i].idwt_buf + 1 * w2 * h2;
 200         s->plane[i].subband[9] = s->plane[i].idwt_buf + 3 * w2 * h2;
 201
 202         for (j = 0; j < DWT_LEVELS; j++) {
 203             for(k = 0; k < 4; k++) {
 204                 s->plane[i].band[j][k].a_width  = w8 << j;
 205                 s->plane[i].band[j][k].a_height = h8 << j;
 206             }
 207         }
 208
 209         /* ll2 and ll1 commented out because they are done in-place */
 210         s->plane[i].l_h[0] = s->plane[i].idwt_tmp;
 211         s->plane[i].l_h[1] = s->plane[i].idwt_tmp + 2 * w8 * h8;
 212         //s->plane[i].l_h[2] = ll2;
 213         s->plane[i].l_h[3] = s->plane[i].idwt_tmp;
 214         s->plane[i].l_h[4] = s->plane[i].idwt_tmp + 2 * w4 * h4;
 215         //s->plane[i].l_h[5] = ll1;
 216         s->plane[i].l_h[6] = s->plane[i].idwt_tmp;
 217         s->plane[i].l_h[7] = s->plane[i].idwt_tmp + 2 * w2 * h2;
 218     }
 219
 220     s->a_height = s->coded_height;
 221     s->a_width  = s->coded_width;
 222     s->a_format = s->coded_format;
 223
 224     return 0;
 225 }
 226
 227 static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
 228                        AVPacket *avpkt)
 229 {
 230     CFHDContext *s = avctx->priv_data;
 231     GetByteContext gb;
 232     ThreadFrame frame = { .f = data };
 233     AVFrame *pic = data;
 234     int ret = 0, i, j, planes, plane, got_buffer = 0;
 235     int16_t *coeff_data;
 236
 237     s->coded_format = AV_PIX_FMT_YUV422P10;
 238     init_frame_defaults(s);
 239     planes = av_pix_fmt_count_planes(s->coded_format);
 240
 241     bytestream2_init(&gb, avpkt->data, avpkt->size);
 242
 243     while (bytestream2_get_bytes_left(&gb) > 4) {
 244         /* Bit weird but implement the tag parsing as the spec says */
 245         uint16_t tagu   = bytestream2_get_be16(&gb);
 246         int16_t tag     = (int16_t)tagu;
 247         int8_t tag8     = (int8_t)(tagu >> 8);
 248         uint16_t abstag = abs(tag);
 249         int8_t abs_tag8 = abs(tag8);
 250         uint16_t data   = bytestream2_get_be16(&gb);
 251         if (abs_tag8 >= 0x60 && abs_tag8 <= 0x6f) {
 252             av_log(avctx, AV_LOG_DEBUG, "large len %x\n", ((tagu & 0xff) << 16) | data);
 253         } else if (tag == 20) {
 254             av_log(avctx, AV_LOG_DEBUG, "Width %"PRIu16"\n", data);
 255             s->coded_width = data;
 256         } else if (tag == 21) {
 257             av_log(avctx, AV_LOG_DEBUG, "Height %"PRIu16"\n", data);
 258             s->coded_height = data;
 259         } else if (tag == 101) {
 260             av_log(avctx, AV_LOG_DEBUG, "Bits per component: %"PRIu16"\n", data);
 261             if (data < 1 || data > 31) {
 262                 av_log(avctx, AV_LOG_ERROR, "Bits per component %d is invalid\n", data);
 263                 ret = AVERROR(EINVAL);
 264                 break;
 265             }
 266             s->bpc = data;
 267         } else if (tag == 12) {
 268             av_log(avctx, AV_LOG_DEBUG, "Channel Count: %"PRIu16"\n", data);
 269             s->channel_cnt = data;
 270             if (data > 4) {
 271                 av_log(avctx, AV_LOG_ERROR, "Channel Count of %"PRIu16" is unsupported\n", data);
 272                 ret = AVERROR_PATCHWELCOME;
 273                 break;
 274             }
 275         } else if (tag == 14) {
 276             av_log(avctx, AV_LOG_DEBUG, "Subband Count: %"PRIu16"\n", data);
 277             if (data != SUBBAND_COUNT) {
 278                 av_log(avctx, AV_LOG_ERROR, "Subband Count of %"PRIu16" is unsupported\n", data);
 279                 ret = AVERROR_PATCHWELCOME;
 280                 break;
 281             }
 282         } else if (tag == 62) {
 283             s->channel_num = data;
 284             av_log(avctx, AV_LOG_DEBUG, "Channel number %"PRIu16"\n", data);
 285             if (s->channel_num >= planes) {
 286                 av_log(avctx, AV_LOG_ERROR, "Invalid channel number\n");
 287                 ret = AVERROR(EINVAL);
 288                 break;
 289             }
 290             init_plane_defaults(s);
 291         } else if (tag == 48) {
 292             if (s->subband_num != 0 && data == 1)  // hack
 293                 s->level++;
 294             av_log(avctx, AV_LOG_DEBUG, "Subband number %"PRIu16"\n", data);
 295             s->subband_num = data;
 296             if (s->level >= DWT_LEVELS) {
 297                 av_log(avctx, AV_LOG_ERROR, "Invalid level\n");
 298                 ret = AVERROR(EINVAL);
 299                 break;
 300             }
 301             if (s->subband_num > 3) {
 302                 av_log(avctx, AV_LOG_ERROR, "Invalid subband number\n");
 303                 ret = AVERROR(EINVAL);
 304                 break;
 305             }
 306         } else if (tag == 51) {
 307             av_log(avctx, AV_LOG_DEBUG, "Subband number actual %"PRIu16"\n", data);
 308             s->subband_num_actual = data;
 309             if (s->subband_num_actual >= 10) {
 310                 av_log(avctx, AV_LOG_ERROR, "Invalid subband number actual\n");
 311                 ret = AVERROR(EINVAL);
 312                 break;
 313             }
 314         } else if (tag == 35)
 315             av_log(avctx, AV_LOG_DEBUG, "Lowpass precision bits: %"PRIu16"\n", data);
 316         else if (tag == 53) {
 317             s->quantisation = data;
 318             av_log(avctx, AV_LOG_DEBUG, "Quantisation: %"PRIu16"\n", data);
 319         } else if (tag == 109) {
 320             s->prescale_shift[0] = (data >> 0) & 0x7;
 321             s->prescale_shift[1] = (data >> 3) & 0x7;
 322             s->prescale_shift[2] = (data >> 6) & 0x7;
 323             av_log(avctx, AV_LOG_DEBUG, "Prescale shift (VC-5): %x\n", data);
 324         } else if (tag == 27) {
 325             av_log(avctx, AV_LOG_DEBUG, "Lowpass width %"PRIu16"\n", data);
 326             if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_width) {
 327                 av_log(avctx, AV_LOG_ERROR, "Invalid lowpass width\n");
 328                 ret = AVERROR(EINVAL);
 329                 break;
 330             }
 331             s->plane[s->channel_num].band[0][0].width  = data;
 332             s->plane[s->channel_num].band[0][0].stride = data;
 333         } else if (tag == 28) {
 334             av_log(avctx, AV_LOG_DEBUG, "Lowpass height %"PRIu16"\n", data);
 335             if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_height) {
 336                 av_log(avctx, AV_LOG_ERROR, "Invalid lowpass height\n");
 337                 ret = AVERROR(EINVAL);
 338                 break;
 339             }
 340             s->plane[s->channel_num].band[0][0].height = data;
 341         } else if (tag == 1)
 342             av_log(avctx, AV_LOG_DEBUG, "Sample type? %"PRIu16"\n", data);
 343         else if (tag == 10) {
 344             if (data != 0) {
 345                 avpriv_report_missing_feature(avctx, "Transform type of %"PRIu16, data);
 346                 ret = AVERROR_PATCHWELCOME;
 347                 break;
 348             }
 349             av_log(avctx, AV_LOG_DEBUG, "Transform-type? %"PRIu16"\n", data);
 350         } else if (abstag >= 0x4000 && abstag <= 0x40ff) {
 351             av_log(avctx, AV_LOG_DEBUG, "Small chunk length %d %s\n", data * 4, tag < 0 ? "optional" : "required");
 352             bytestream2_skipu(&gb, data * 4);
 353         } else if (tag == 23) {
 354             av_log(avctx, AV_LOG_DEBUG, "Skip frame\n");
 355             avpriv_report_missing_feature(avctx, "Skip frame");
 356             ret = AVERROR_PATCHWELCOME;
 357             break;
 358         } else if (tag == 2) {
 359             av_log(avctx, AV_LOG_DEBUG, "tag=2 header - skipping %i tag/value pairs\n", data);
 360             if (data > bytestream2_get_bytes_left(&gb) / 4) {
 361                 av_log(avctx, AV_LOG_ERROR, "too many tag/value pairs (%d)\n", data);
 362                 ret = AVERROR_INVALIDDATA;
 363                 break;
 364             }
 365             for (i = 0; i < data; i++) {
 366                 uint16_t tag2 = bytestream2_get_be16(&gb);
 367                 uint16_t val2 = bytestream2_get_be16(&gb);
 368                 av_log(avctx, AV_LOG_DEBUG, "Tag/Value = %x %x\n", tag2, val2);
 369             }
 370         } else if (tag == 41) {
 371             av_log(avctx, AV_LOG_DEBUG, "Highpass width %i channel %i level %i subband %i\n", data, s->channel_num, s->level, s->subband_num);
 372             if (data < 3) {
 373                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass width\n");
 374                 ret = AVERROR(EINVAL);
 375                 break;
 376             }
 377             s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;
 378             s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
 379         } else if (tag == 42) {
 380             av_log(avctx, AV_LOG_DEBUG, "Highpass height %i\n", data);
 381             if (data < 3) {
 382                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass height\n");
 383                 ret = AVERROR(EINVAL);
 384                 break;
 385             }
 386             s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
 387         } else if (tag == 49) {
 388             av_log(avctx, AV_LOG_DEBUG, "Highpass width2 %i\n", data);
 389             if (data < 3) {
 390                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass width2\n");
 391                 ret = AVERROR(EINVAL);
 392                 break;
 393             }
 394             s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;
 395             s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
 396         } else if (tag == 50) {
 397             av_log(avctx, AV_LOG_DEBUG, "Highpass height2 %i\n", data);
 398             if (data < 3) {
 399                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass height2\n");
 400                 ret = AVERROR(EINVAL);
 401                 break;
 402             }
 403             s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
 404         } else if (tag == 71) {
 405             s->codebook = data;
 406             av_log(avctx, AV_LOG_DEBUG, "Codebook %i\n", s->codebook);
 407         } else if (tag == 72) {
 408             s->codebook = data;
 409             av_log(avctx, AV_LOG_DEBUG, "Other codebook? %i\n", s->codebook);
 410         } else if (tag == 70) {
 411             av_log(avctx, AV_LOG_DEBUG, "Subsampling or bit-depth flag? %i\n", data);
 412             if (!(data == 10 || data == 12)) {
 413                 av_log(avctx, AV_LOG_ERROR, "Invalid bits per channel\n");
 414                 ret = AVERROR(EINVAL);
 415                 break;
 416             }
 417             s->bpc = data;
 418         } else if (tag == 84) {
 419             av_log(avctx, AV_LOG_DEBUG, "Sample format? %i\n", data);
 420             if (data == 1)
 421                 s->coded_format = AV_PIX_FMT_YUV422P10;
 422             else if (data == 3)
 423                 s->coded_format = AV_PIX_FMT_GBRP12;
 424             else if (data == 4)
 425                 s->coded_format = AV_PIX_FMT_GBRAP12;
 426             else {
 427                 avpriv_report_missing_feature(avctx, "Sample format of %"PRIu16, data);
 428                 ret = AVERROR_PATCHWELCOME;
 429                 break;
 430             }
 431             planes = av_pix_fmt_count_planes(s->coded_format);
 432         } else
 433             av_log(avctx, AV_LOG_DEBUG,  "Unknown tag %i data %x\n", tag, data);
 434
 435         /* Some kind of end of header tag */
 436         if (tag == 4 && data == 0x1a4a && s->coded_width && s->coded_height &&
 437             s->coded_format != AV_PIX_FMT_NONE) {
 438             if (s->a_width != s->coded_width || s->a_height != s->coded_height ||
 439                 s->a_format != s->coded_format) {
 440                 free_buffers(avctx);
 441                 if ((ret = alloc_buffers(avctx)) < 0) {
 442                     free_buffers(avctx);
 443                     return ret;
 444                 }
 445             }
 446             ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height);
 447             if (ret < 0)
 448                 return ret;
 449             frame.f->width =
 450             frame.f->height = 0;
 451
 452             if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
 453                 return ret;
 454
 455             s->coded_width = 0;
 456             s->coded_height = 0;
 457             s->coded_format = AV_PIX_FMT_NONE;
 458             got_buffer = 1;
 459         }
 460         coeff_data = s->plane[s->channel_num].subband[s->subband_num_actual];
 461
 462         /* Lowpass coefficients */
 463         if (tag == 4 && data == 0xf0f && s->a_width && s->a_height) {
 464             int lowpass_height = s->plane[s->channel_num].band[0][0].height;
 465             int lowpass_width  = s->plane[s->channel_num].band[0][0].width;
 466             int lowpass_a_height = s->plane[s->channel_num].band[0][0].a_height;
 467             int lowpass_a_width  = s->plane[s->channel_num].band[0][0].a_width;
 468
 469             if (!got_buffer) {
 470                 av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 471                 ret = AVERROR(EINVAL);
 472                 goto end;
 473             }
 474
 475             if (lowpass_height > lowpass_a_height || lowpass_width > lowpass_a_width ||
 476                 lowpass_a_width * lowpass_a_height * sizeof(int16_t) > bytestream2_get_bytes_left(&gb)) {
 477                 av_log(avctx, AV_LOG_ERROR, "Too many lowpass coefficients\n");
 478                 ret = AVERROR(EINVAL);
 479                 goto end;
 480             }
 481
 482             av_log(avctx, AV_LOG_DEBUG, "Start of lowpass coeffs component %d height:%d, width:%d\n", s->channel_num, lowpass_height, lowpass_width);
 483             for (i = 0; i < lowpass_height; i++) {
 484                 for (j = 0; j < lowpass_width; j++)
 485                     coeff_data[j] = bytestream2_get_be16u(&gb);
 486
 487                 coeff_data += lowpass_width;
 488             }
 489
 490             /* Align to mod-4 position to continue reading tags */
 491             bytestream2_seek(&gb, bytestream2_tell(&gb) & 3, SEEK_CUR);
 492
 493             /* Copy last line of coefficients if odd height */
 494             if (lowpass_height & 1) {
 495                 memcpy(&coeff_data[lowpass_height * lowpass_width],
 496                        &coeff_data[(lowpass_height - 1) * lowpass_width],
 497                        lowpass_width * sizeof(*coeff_data));
 498             }
 499
 500             av_log(avctx, AV_LOG_DEBUG, "Lowpass coefficients %d\n", lowpass_width * lowpass_height);
 501         }
 502
 503         if (tag == 55 && s->subband_num_actual != 255 && s->a_width && s->a_height) {
 504             int highpass_height = s->plane[s->channel_num].band[s->level][s->subband_num].height;
 505             int highpass_width  = s->plane[s->channel_num].band[s->level][s->subband_num].width;
 506             int highpass_a_width = s->plane[s->channel_num].band[s->level][s->subband_num].a_width;
 507             int highpass_a_height = s->plane[s->channel_num].band[s->level][s->subband_num].a_height;
 508             int highpass_stride = s->plane[s->channel_num].band[s->level][s->subband_num].stride;
 509             int expected;
 510             int a_expected = highpass_a_height * highpass_a_width;
 511             int level, run, coeff;
 512             int count = 0, bytes;
 513
 514             if (!got_buffer) {
 515                 av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 516                 ret = AVERROR(EINVAL);
 517                 goto end;
 518             }
 519
 520             if (highpass_height > highpass_a_height || highpass_width > highpass_a_width || a_expected < highpass_height * (uint64_t)highpass_stride) {
 521                 av_log(avctx, AV_LOG_ERROR, "Too many highpass coefficients\n");
 522                 ret = AVERROR(EINVAL);
 523                 goto end;
 524             }
 525             expected = highpass_height * highpass_stride;
 526
 527             av_log(avctx, AV_LOG_DEBUG, "Start subband coeffs plane %i level %i codebook %i expected %i\n", s->channel_num, s->level, s->codebook, expected);
 528
 529             init_get_bits(&s->gb, gb.buffer, bytestream2_get_bytes_left(&gb) * 8);
 530             {
 531                 OPEN_READER(re, &s->gb);
 532                 if (!s->codebook) {
 533                     while (1) {
 534                         UPDATE_CACHE(re, &s->gb);
 535                         GET_RL_VLC(level, run, re, &s->gb, s->table_9_rl_vlc,
 536                                    VLC_BITS, 3, 1);
 537
 538                         /* escape */
 539                         if (level == 64)
 540                             break;
 541
 542                         count += run;
 543
 544                         if (count > expected)
 545                             break;
 546
 547                         coeff = dequant_and_decompand(level, s->quantisation);
 548                         for (i = 0; i < run; i++)
 549                             *coeff_data++ = coeff;
 550                     }
 551                 } else {
 552                     while (1) {
 553                         UPDATE_CACHE(re, &s->gb);
 554                         GET_RL_VLC(level, run, re, &s->gb, s->table_18_rl_vlc,
 555                                    VLC_BITS, 3, 1);
 556
 557                         /* escape */
 558                         if (level == 255 && run == 2)
 559                             break;
 560
 561                         count += run;
 562
 563                         if (count > expected)
 564                             break;
 565
 566                         coeff = dequant_and_decompand(level, s->quantisation);
 567                         for (i = 0; i < run; i++)
 568                             *coeff_data++ = coeff;
 569                     }
 570                 }
 571                 CLOSE_READER(re, &s->gb);
 572             }
 573
 574             if (count > expected) {
 575                 av_log(avctx, AV_LOG_ERROR, "Escape codeword not found, probably corrupt data\n");
 576                 ret = AVERROR(EINVAL);
 577                 goto end;
 578             }
 579
 580             bytes = FFALIGN(FF_CEIL_RSHIFT(get_bits_count(&s->gb), 3), 4);
 581             if (bytes > bytestream2_get_bytes_left(&gb)) {
 582                 av_log(avctx, AV_LOG_ERROR, "Bitstream overread error\n");
 583                 ret = AVERROR(EINVAL);
 584                 goto end;
 585             } else
 586                 bytestream2_seek(&gb, bytes, SEEK_CUR);
 587
 588             av_log(avctx, AV_LOG_DEBUG, "End subband coeffs %i extra %i\n", count, count - expected);
 589             s->codebook = 0;
 590
 591             /* Copy last line of coefficients if odd height */
 592             if (highpass_height & 1) {
 593                 memcpy(&coeff_data[highpass_height * highpass_stride],
 594                        &coeff_data[(highpass_height - 1) * highpass_stride],
 595                        highpass_stride * sizeof(*coeff_data));
 596             }
 597         }
 598     }
 599
 600     if (!s->a_width || !s->a_height || s->a_format == AV_PIX_FMT_NONE ||
 601         s->coded_width || s->coded_height || s->coded_format != AV_PIX_FMT_NONE) {
 602         av_log(avctx, AV_LOG_ERROR, "Invalid dimensions\n");
 603         ret = AVERROR(EINVAL);
 604         goto end;
 605     }
 606
 607     if (!got_buffer) {
 608         av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 609         ret = AVERROR(EINVAL);
 610         goto end;
 611     }
 612
 613     planes = av_pix_fmt_count_planes(avctx->pix_fmt);
 614     for (plane = 0; plane < planes && !ret; plane++) {
 615         /* level 1 */
 616         int lowpass_height  = s->plane[plane].band[0][0].height;
 617         int lowpass_width   = s->plane[plane].band[0][0].width;
 618         int highpass_stride = s->plane[plane].band[0][1].stride;
 619         int act_plane = plane == 1 ? 2 : plane == 2 ? 1 : plane;
 620         int16_t *low, *high, *output, *dst;
 621
 622         if (lowpass_height > s->plane[plane].band[0][0].a_height || lowpass_width > s->plane[plane].band[0][0].a_width ||
 623             !highpass_stride || s->plane[plane].band[0][1].width > s->plane[plane].band[0][1].a_width) {
 624             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 625             ret = AVERROR(EINVAL);
 626             goto end;
 627         }
 628
 629         av_log(avctx, AV_LOG_DEBUG, "Decoding level 1 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 630
 631         low    = s->plane[plane].subband[0];
 632         high   = s->plane[plane].subband[2];
 633         output = s->plane[plane].l_h[0];
 634         for (i = 0; i < lowpass_width; i++) {
 635             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 636             low++;
 637             high++;
 638             output++;
 639         }
 640
 641         low    = s->plane[plane].subband[1];
 642         high   = s->plane[plane].subband[3];
 643         output = s->plane[plane].l_h[1];
 644
 645         for (i = 0; i < lowpass_width; i++) {
 646             // note the stride of "low" is highpass_stride
 647             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 648             low++;
 649             high++;
 650             output++;
 651         }
 652
 653         low    = s->plane[plane].l_h[0];
 654         high   = s->plane[plane].l_h[1];
 655         output = s->plane[plane].subband[0];
 656         for (i = 0; i < lowpass_height * 2; i++) {
 657             horiz_filter(output, low, high, lowpass_width);
 658             low    += lowpass_width;
 659             high   += lowpass_width;
 660             output += lowpass_width * 2;
 661         }
 662         if (s->bpc == 12) {
 663             output = s->plane[plane].subband[0];
 664             for (i = 0; i < lowpass_height * 2; i++) {
 665                 for (j = 0; j < lowpass_width * 2; j++)
 666                     output[j] *= 4;
 667
 668                 output += lowpass_width * 2;
 669             }
 670         }
 671
 672         /* level 2 */
 673         lowpass_height  = s->plane[plane].band[1][1].height;
 674         lowpass_width   = s->plane[plane].band[1][1].width;
 675         highpass_stride = s->plane[plane].band[1][1].stride;
 676
 677         if (lowpass_height > s->plane[plane].band[1][1].a_height || lowpass_width > s->plane[plane].band[1][1].a_width ||
 678             !highpass_stride || s->plane[plane].band[1][1].width > s->plane[plane].band[1][1].a_width) {
 679             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 680             ret = AVERROR(EINVAL);
 681             goto end;
 682         }
 683
 684         av_log(avctx, AV_LOG_DEBUG, "Level 2 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 685
 686         low    = s->plane[plane].subband[0];
 687         high   = s->plane[plane].subband[5];
 688         output = s->plane[plane].l_h[3];
 689         for (i = 0; i < lowpass_width; i++) {
 690             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 691             low++;
 692             high++;
 693             output++;
 694         }
 695
 696         low    = s->plane[plane].subband[4];
 697         high   = s->plane[plane].subband[6];
 698         output = s->plane[plane].l_h[4];
 699         for (i = 0; i < lowpass_width; i++) {
 700             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 701             low++;
 702             high++;
 703             output++;
 704         }
 705
 706         low    = s->plane[plane].l_h[3];
 707         high   = s->plane[plane].l_h[4];
 708         output = s->plane[plane].subband[0];
 709         for (i = 0; i < lowpass_height * 2; i++) {
 710             horiz_filter(output, low, high, lowpass_width);
 711             low    += lowpass_width;
 712             high   += lowpass_width;
 713             output += lowpass_width * 2;
 714         }
 715
 716         output = s->plane[plane].subband[0];
 717         for (i = 0; i < lowpass_height * 2; i++) {
 718             for (j = 0; j < lowpass_width * 2; j++)
 719                 output[j] *= 4;
 720
 721             output += lowpass_width * 2;
 722         }
 723
 724         /* level 3 */
 725         lowpass_height  = s->plane[plane].band[2][1].height;
 726         lowpass_width   = s->plane[plane].band[2][1].width;
 727         highpass_stride = s->plane[plane].band[2][1].stride;
 728
 729         if (lowpass_height > s->plane[plane].band[2][1].a_height || lowpass_width > s->plane[plane].band[2][1].a_width ||
 730             !highpass_stride || s->plane[plane].band[2][1].width > s->plane[plane].band[2][1].a_width) {
 731             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 732             ret = AVERROR(EINVAL);
 733             goto end;
 734         }
 735
 736         av_log(avctx, AV_LOG_DEBUG, "Level 3 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 737
 738         low    = s->plane[plane].subband[0];
 739         high   = s->plane[plane].subband[8];
 740         output = s->plane[plane].l_h[6];
 741         for (i = 0; i < lowpass_width; i++) {
 742             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 743             low++;
 744             high++;
 745             output++;
 746         }
 747
 748         low    = s->plane[plane].subband[7];
 749         high   = s->plane[plane].subband[9];
 750         output = s->plane[plane].l_h[7];
 751         for (i = 0; i < lowpass_width; i++) {
 752             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 753             low++;
 754             high++;
 755             output++;
 756         }
 757
 758         dst = (int16_t *)pic->data[act_plane];
 759         low  = s->plane[plane].l_h[6];
 760         high = s->plane[plane].l_h[7];
 761         for (i = 0; i < lowpass_height * 2; i++) {
 762             horiz_filter_clip(dst, low, high, lowpass_width, s->bpc);
 763             low  += lowpass_width;
 764             high += lowpass_width;
 765             dst  += pic->linesize[act_plane] / 2;
 766         }
 767     }
 768
 769
 770 end:
 771     if (ret < 0)
 772         return ret;
 773
 774     *got_frame = 1;
 775     return avpkt->size;
 776 }
 777
 778 static av_cold int cfhd_close_decoder(AVCodecContext *avctx)
 779 {
 780     CFHDContext *s = avctx->priv_data;
 781
 782     free_buffers(avctx);
 783
 784     if (!avctx->internal->is_copy) {
 785         ff_free_vlc(&s->vlc_9);
 786         ff_free_vlc(&s->vlc_18);
 787     }
 788
 789     return 0;
 790 }
 791
 792 AVCodec ff_cfhd_decoder = {
 793     .name           = "cfhd",
 794     .long_name      = NULL_IF_CONFIG_SMALL("Cineform HD"),
 795     .type           = AVMEDIA_TYPE_VIDEO,
 796     .id             = AV_CODEC_ID_CFHD,
 797     .priv_data_size = sizeof(CFHDContext),
 798     .init           = cfhd_decode_init,
 799     .close          = cfhd_close_decoder,
 800     .decode         = cfhd_decode,
 801     .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
 802     .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
 803 };