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