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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         if (chroma_y_shift)
 217             height = FFALIGN(height / 8, 2) * 8;
 218         s->plane[i].width  = width;
 219         s->plane[i].height = height;
 220         s->plane[i].stride = stride;
 221
 222         w8 = FFALIGN(s->plane[i].width  / 8, 8);
 223         h8 = height / 8;
 224         w4 = w8 * 2;
 225         h4 = h8 * 2;
 226         w2 = w4 * 2;
 227         h2 = h4 * 2;
 228
 229         s->plane[i].idwt_buf =
 230             av_mallocz_array(height * stride, sizeof(*s->plane[i].idwt_buf));
 231         s->plane[i].idwt_tmp =
 232             av_malloc_array(height * stride, sizeof(*s->plane[i].idwt_tmp));
 233         if (!s->plane[i].idwt_buf || !s->plane[i].idwt_tmp)
 234             return AVERROR(ENOMEM);
 235
 236         s->plane[i].subband[0] = s->plane[i].idwt_buf;
 237         s->plane[i].subband[1] = s->plane[i].idwt_buf + 2 * w8 * h8;
 238         s->plane[i].subband[2] = s->plane[i].idwt_buf + 1 * w8 * h8;
 239         s->plane[i].subband[3] = s->plane[i].idwt_buf + 3 * w8 * h8;
 240         s->plane[i].subband[4] = s->plane[i].idwt_buf + 2 * w4 * h4;
 241         s->plane[i].subband[5] = s->plane[i].idwt_buf + 1 * w4 * h4;
 242         s->plane[i].subband[6] = s->plane[i].idwt_buf + 3 * w4 * h4;
 243         s->plane[i].subband[7] = s->plane[i].idwt_buf + 2 * w2 * h2;
 244         s->plane[i].subband[8] = s->plane[i].idwt_buf + 1 * w2 * h2;
 245         s->plane[i].subband[9] = s->plane[i].idwt_buf + 3 * w2 * h2;
 246
 247         for (j = 0; j < DWT_LEVELS; j++) {
 248             for (k = 0; k < FF_ARRAY_ELEMS(s->plane[i].band[j]); k++) {
 249                 s->plane[i].band[j][k].a_width  = w8 << j;
 250                 s->plane[i].band[j][k].a_height = h8 << j;
 251             }
 252         }
 253
 254         /* ll2 and ll1 commented out because they are done in-place */
 255         s->plane[i].l_h[0] = s->plane[i].idwt_tmp;
 256         s->plane[i].l_h[1] = s->plane[i].idwt_tmp + 2 * w8 * h8;
 257         // s->plane[i].l_h[2] = ll2;
 258         s->plane[i].l_h[3] = s->plane[i].idwt_tmp;
 259         s->plane[i].l_h[4] = s->plane[i].idwt_tmp + 2 * w4 * h4;
 260         // s->plane[i].l_h[5] = ll1;
 261         s->plane[i].l_h[6] = s->plane[i].idwt_tmp;
 262         s->plane[i].l_h[7] = s->plane[i].idwt_tmp + 2 * w2 * h2;
 263     }
 264
 265     s->a_height = s->coded_height;
 266     s->a_width  = s->coded_width;
 267     s->a_format = s->coded_format;
 268
 269     return 0;
 270 }
 271
 272 static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
 273                        AVPacket *avpkt)
 274 {
 275     CFHDContext *s = avctx->priv_data;
 276     GetByteContext gb;
 277     ThreadFrame frame = { .f = data };
 278     AVFrame *pic = data;
 279     int ret = 0, i, j, planes, plane, got_buffer = 0;
 280     int16_t *coeff_data;
 281
 282     s->coded_format = AV_PIX_FMT_YUV422P10;
 283     init_frame_defaults(s);
 284     planes = av_pix_fmt_count_planes(s->coded_format);
 285
 286     bytestream2_init(&gb, avpkt->data, avpkt->size);
 287
 288     while (bytestream2_get_bytes_left(&gb) > 4) {
 289         /* Bit weird but implement the tag parsing as the spec says */
 290         uint16_t tagu   = bytestream2_get_be16(&gb);
 291         int16_t tag     = (int16_t)tagu;
 292         int8_t tag8     = (int8_t)(tagu >> 8);
 293         uint16_t abstag = abs(tag);
 294         int8_t abs_tag8 = abs(tag8);
 295         uint16_t data   = bytestream2_get_be16(&gb);
 296         if (abs_tag8 >= 0x60 && abs_tag8 <= 0x6f) {
 297             av_log(avctx, AV_LOG_DEBUG, "large len %x\n", ((tagu & 0xff) << 16) | data);
 298         } else if (tag == ImageWidth) {
 299             av_log(avctx, AV_LOG_DEBUG, "Width %"PRIu16"\n", data);
 300             s->coded_width = data;
 301         } else if (tag == ImageHeight) {
 302             av_log(avctx, AV_LOG_DEBUG, "Height %"PRIu16"\n", data);
 303             s->coded_height = data;
 304         } else if (tag == 101) {
 305             av_log(avctx, AV_LOG_DEBUG, "Bits per component: %"PRIu16"\n", data);
 306             if (data < 1 || data > 31) {
 307                 av_log(avctx, AV_LOG_ERROR, "Bits per component %d is invalid\n", data);
 308                 ret = AVERROR(EINVAL);
 309                 break;
 310             }
 311             s->bpc = data;
 312         } else if (tag == ChannelCount) {
 313             av_log(avctx, AV_LOG_DEBUG, "Channel Count: %"PRIu16"\n", data);
 314             s->channel_cnt = data;
 315             if (data > 4) {
 316                 av_log(avctx, AV_LOG_ERROR, "Channel Count of %"PRIu16" is unsupported\n", data);
 317                 ret = AVERROR_PATCHWELCOME;
 318                 break;
 319             }
 320         } else if (tag == SubbandCount) {
 321             av_log(avctx, AV_LOG_DEBUG, "Subband Count: %"PRIu16"\n", data);
 322             if (data != SUBBAND_COUNT) {
 323                 av_log(avctx, AV_LOG_ERROR, "Subband Count of %"PRIu16" is unsupported\n", data);
 324                 ret = AVERROR_PATCHWELCOME;
 325                 break;
 326             }
 327         } else if (tag == ChannelNumber) {
 328             s->channel_num = data;
 329             av_log(avctx, AV_LOG_DEBUG, "Channel number %"PRIu16"\n", data);
 330             if (s->channel_num >= planes) {
 331                 av_log(avctx, AV_LOG_ERROR, "Invalid channel number\n");
 332                 ret = AVERROR(EINVAL);
 333                 break;
 334             }
 335             init_plane_defaults(s);
 336         } else if (tag == SubbandNumber) {
 337             if (s->subband_num != 0 && data == 1)  // hack
 338                 s->level++;
 339             av_log(avctx, AV_LOG_DEBUG, "Subband number %"PRIu16"\n", data);
 340             s->subband_num = data;
 341             if (s->level >= DWT_LEVELS) {
 342                 av_log(avctx, AV_LOG_ERROR, "Invalid level\n");
 343                 ret = AVERROR(EINVAL);
 344                 break;
 345             }
 346             if (s->subband_num > 3) {
 347                 av_log(avctx, AV_LOG_ERROR, "Invalid subband number\n");
 348                 ret = AVERROR(EINVAL);
 349                 break;
 350             }
 351         } else if (tag == 51) {
 352             av_log(avctx, AV_LOG_DEBUG, "Subband number actual %"PRIu16"\n", data);
 353             s->subband_num_actual = data;
 354             if (s->subband_num_actual >= 10) {
 355                 av_log(avctx, AV_LOG_ERROR, "Invalid subband number actual\n");
 356                 ret = AVERROR(EINVAL);
 357                 break;
 358             }
 359         } else if (tag == LowpassPrecision)
 360             av_log(avctx, AV_LOG_DEBUG, "Lowpass precision bits: %"PRIu16"\n", data);
 361         else if (tag == Quantization) {
 362             s->quantisation = data;
 363             av_log(avctx, AV_LOG_DEBUG, "Quantisation: %"PRIu16"\n", data);
 364         } else if (tag == PrescaleShift) {
 365             s->prescale_shift[0] = (data >> 0) & 0x7;
 366             s->prescale_shift[1] = (data >> 3) & 0x7;
 367             s->prescale_shift[2] = (data >> 6) & 0x7;
 368             av_log(avctx, AV_LOG_DEBUG, "Prescale shift (VC-5): %x\n", data);
 369         } else if (tag == 27) {
 370             av_log(avctx, AV_LOG_DEBUG, "Lowpass width %"PRIu16"\n", data);
 371             if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_width) {
 372                 av_log(avctx, AV_LOG_ERROR, "Invalid lowpass width\n");
 373                 ret = AVERROR(EINVAL);
 374                 break;
 375             }
 376             s->plane[s->channel_num].band[0][0].width  = data;
 377             s->plane[s->channel_num].band[0][0].stride = data;
 378         } else if (tag == 28) {
 379             av_log(avctx, AV_LOG_DEBUG, "Lowpass height %"PRIu16"\n", data);
 380             if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_height) {
 381                 av_log(avctx, AV_LOG_ERROR, "Invalid lowpass height\n");
 382                 ret = AVERROR(EINVAL);
 383                 break;
 384             }
 385             s->plane[s->channel_num].band[0][0].height = data;
 386         } else if (tag == 1)
 387             av_log(avctx, AV_LOG_DEBUG, "Sample type? %"PRIu16"\n", data);
 388         else if (tag == 10) {
 389             if (data != 0) {
 390                 avpriv_report_missing_feature(avctx, "Transform type of %"PRIu16, data);
 391                 ret = AVERROR_PATCHWELCOME;
 392                 break;
 393             }
 394             av_log(avctx, AV_LOG_DEBUG, "Transform-type? %"PRIu16"\n", data);
 395         } else if (abstag >= 0x4000 && abstag <= 0x40ff) {
 396             av_log(avctx, AV_LOG_DEBUG, "Small chunk length %d %s\n", data * 4, tag < 0 ? "optional" : "required");
 397             bytestream2_skipu(&gb, data * 4);
 398         } else if (tag == 23) {
 399             av_log(avctx, AV_LOG_DEBUG, "Skip frame\n");
 400             avpriv_report_missing_feature(avctx, "Skip frame");
 401             ret = AVERROR_PATCHWELCOME;
 402             break;
 403         } else if (tag == 2) {
 404             av_log(avctx, AV_LOG_DEBUG, "tag=2 header - skipping %i tag/value pairs\n", data);
 405             if (data > bytestream2_get_bytes_left(&gb) / 4) {
 406                 av_log(avctx, AV_LOG_ERROR, "too many tag/value pairs (%d)\n", data);
 407                 ret = AVERROR_INVALIDDATA;
 408                 break;
 409             }
 410             for (i = 0; i < data; i++) {
 411                 uint16_t tag2 = bytestream2_get_be16(&gb);
 412                 uint16_t val2 = bytestream2_get_be16(&gb);
 413                 av_log(avctx, AV_LOG_DEBUG, "Tag/Value = %x %x\n", tag2, val2);
 414             }
 415         } else if (tag == 41) {
 416             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);
 417             if (data < 3) {
 418                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass width\n");
 419                 ret = AVERROR(EINVAL);
 420                 break;
 421             }
 422             s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;
 423             s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
 424         } else if (tag == 42) {
 425             av_log(avctx, AV_LOG_DEBUG, "Highpass height %i\n", data);
 426             if (data < 3) {
 427                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass height\n");
 428                 ret = AVERROR(EINVAL);
 429                 break;
 430             }
 431             s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
 432         } else if (tag == 49) {
 433             av_log(avctx, AV_LOG_DEBUG, "Highpass width2 %i\n", data);
 434             if (data < 3) {
 435                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass width2\n");
 436                 ret = AVERROR(EINVAL);
 437                 break;
 438             }
 439             s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;
 440             s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
 441         } else if (tag == 50) {
 442             av_log(avctx, AV_LOG_DEBUG, "Highpass height2 %i\n", data);
 443             if (data < 3) {
 444                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass height2\n");
 445                 ret = AVERROR(EINVAL);
 446                 break;
 447             }
 448             s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
 449         } else if (tag == 71) {
 450             s->codebook = data;
 451             av_log(avctx, AV_LOG_DEBUG, "Codebook %i\n", s->codebook);
 452         } else if (tag == 72) {
 453             s->codebook = data;
 454             av_log(avctx, AV_LOG_DEBUG, "Other codebook? %i\n", s->codebook);
 455         } else if (tag == 70) {
 456             av_log(avctx, AV_LOG_DEBUG, "Subsampling or bit-depth flag? %i\n", data);
 457             if (!(data == 10 || data == 12)) {
 458                 av_log(avctx, AV_LOG_ERROR, "Invalid bits per channel\n");
 459                 ret = AVERROR(EINVAL);
 460                 break;
 461             }
 462             s->bpc = data;
 463         } else if (tag == 84) {
 464             av_log(avctx, AV_LOG_DEBUG, "Sample format? %i\n", data);
 465             if (data == 1)
 466                 s->coded_format = AV_PIX_FMT_YUV422P10;
 467             else if (data == 3)
 468                 s->coded_format = AV_PIX_FMT_GBRP12;
 469             else if (data == 4)
 470                 s->coded_format = AV_PIX_FMT_GBRAP12;
 471             else {
 472                 avpriv_report_missing_feature(avctx, "Sample format of %"PRIu16, data);
 473                 ret = AVERROR_PATCHWELCOME;
 474                 break;
 475             }
 476             planes = av_pix_fmt_count_planes(s->coded_format);
 477         } else if (tag == -85) {
 478             av_log(avctx, AV_LOG_DEBUG, "Cropped height %"PRIu16"\n", data);
 479             s->cropped_height = data;
 480         } else
 481             av_log(avctx, AV_LOG_DEBUG,  "Unknown tag %i data %x\n", tag, data);
 482
 483         /* Some kind of end of header tag */
 484         if (tag == 4 && data == 0x1a4a && s->coded_width && s->coded_height &&
 485             s->coded_format != AV_PIX_FMT_NONE) {
 486             if (s->a_width != s->coded_width || s->a_height != s->coded_height ||
 487                 s->a_format != s->coded_format) {
 488                 free_buffers(s);
 489                 if ((ret = alloc_buffers(avctx)) < 0) {
 490                     free_buffers(s);
 491                     return ret;
 492                 }
 493             }
 494             ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height);
 495             if (ret < 0)
 496                 return ret;
 497             if (s->cropped_height)
 498                 avctx->height = s->cropped_height;
 499             frame.f->width =
 500             frame.f->height = 0;
 501
 502             if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
 503                 return ret;
 504
 505             s->coded_width = 0;
 506             s->coded_height = 0;
 507             s->coded_format = AV_PIX_FMT_NONE;
 508             got_buffer = 1;
 509         }
 510         coeff_data = s->plane[s->channel_num].subband[s->subband_num_actual];
 511
 512         /* Lowpass coefficients */
 513         if (tag == 4 && data == 0xf0f && s->a_width && s->a_height) {
 514             int lowpass_height = s->plane[s->channel_num].band[0][0].height;
 515             int lowpass_width  = s->plane[s->channel_num].band[0][0].width;
 516             int lowpass_a_height = s->plane[s->channel_num].band[0][0].a_height;
 517             int lowpass_a_width  = s->plane[s->channel_num].band[0][0].a_width;
 518
 519             if (!got_buffer) {
 520                 av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 521                 ret = AVERROR(EINVAL);
 522                 goto end;
 523             }
 524
 525             if (lowpass_height > lowpass_a_height || lowpass_width > lowpass_a_width ||
 526                 lowpass_a_width * lowpass_a_height * sizeof(int16_t) > bytestream2_get_bytes_left(&gb)) {
 527                 av_log(avctx, AV_LOG_ERROR, "Too many lowpass coefficients\n");
 528                 ret = AVERROR(EINVAL);
 529                 goto end;
 530             }
 531
 532             av_log(avctx, AV_LOG_DEBUG, "Start of lowpass coeffs component %d height:%d, width:%d\n", s->channel_num, lowpass_height, lowpass_width);
 533             for (i = 0; i < lowpass_height; i++) {
 534                 for (j = 0; j < lowpass_width; j++)
 535                     coeff_data[j] = bytestream2_get_be16u(&gb);
 536
 537                 coeff_data += lowpass_width;
 538             }
 539
 540             /* Align to mod-4 position to continue reading tags */
 541             bytestream2_seek(&gb, bytestream2_tell(&gb) & 3, SEEK_CUR);
 542
 543             /* Copy last line of coefficients if odd height */
 544             if (lowpass_height & 1) {
 545                 memcpy(&coeff_data[lowpass_height * lowpass_width],
 546                        &coeff_data[(lowpass_height - 1) * lowpass_width],
 547                        lowpass_width * sizeof(*coeff_data));
 548             }
 549
 550             av_log(avctx, AV_LOG_DEBUG, "Lowpass coefficients %d\n", lowpass_width * lowpass_height);
 551         }
 552
 553         if (tag == 55 && s->subband_num_actual != 255 && s->a_width && s->a_height) {
 554             int highpass_height = s->plane[s->channel_num].band[s->level][s->subband_num].height;
 555             int highpass_width  = s->plane[s->channel_num].band[s->level][s->subband_num].width;
 556             int highpass_a_width = s->plane[s->channel_num].band[s->level][s->subband_num].a_width;
 557             int highpass_a_height = s->plane[s->channel_num].band[s->level][s->subband_num].a_height;
 558             int highpass_stride = s->plane[s->channel_num].band[s->level][s->subband_num].stride;
 559             int expected;
 560             int a_expected = highpass_a_height * highpass_a_width;
 561             int level, run, coeff;
 562             int count = 0, bytes;
 563
 564             if (!got_buffer) {
 565                 av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 566                 ret = AVERROR(EINVAL);
 567                 goto end;
 568             }
 569
 570             if (highpass_height > highpass_a_height || highpass_width > highpass_a_width || a_expected < highpass_height * (uint64_t)highpass_stride) {
 571                 av_log(avctx, AV_LOG_ERROR, "Too many highpass coefficients\n");
 572                 ret = AVERROR(EINVAL);
 573                 goto end;
 574             }
 575             expected = highpass_height * highpass_stride;
 576
 577             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);
 578
 579             init_get_bits(&s->gb, gb.buffer, bytestream2_get_bytes_left(&gb) * 8);
 580             {
 581                 OPEN_READER(re, &s->gb);
 582                 if (!s->codebook) {
 583                     while (1) {
 584                         UPDATE_CACHE(re, &s->gb);
 585                         GET_RL_VLC(level, run, re, &s->gb, s->table_9_rl_vlc,
 586                                    VLC_BITS, 3, 1);
 587
 588                         /* escape */
 589                         if (level == 64)
 590                             break;
 591
 592                         count += run;
 593
 594                         if (count > expected)
 595                             break;
 596
 597                         coeff = dequant_and_decompand(level, s->quantisation);
 598                         for (i = 0; i < run; i++)
 599                             *coeff_data++ = coeff;
 600                     }
 601                 } else {
 602                     while (1) {
 603                         UPDATE_CACHE(re, &s->gb);
 604                         GET_RL_VLC(level, run, re, &s->gb, s->table_18_rl_vlc,
 605                                    VLC_BITS, 3, 1);
 606
 607                         /* escape */
 608                         if (level == 255 && run == 2)
 609                             break;
 610
 611                         count += run;
 612
 613                         if (count > expected)
 614                             break;
 615
 616                         coeff = dequant_and_decompand(level, s->quantisation);
 617                         for (i = 0; i < run; i++)
 618                             *coeff_data++ = coeff;
 619                     }
 620                 }
 621                 CLOSE_READER(re, &s->gb);
 622             }
 623
 624             if (count > expected) {
 625                 av_log(avctx, AV_LOG_ERROR, "Escape codeword not found, probably corrupt data\n");
 626                 ret = AVERROR(EINVAL);
 627                 goto end;
 628             }
 629
 630             bytes = FFALIGN(FF_CEIL_RSHIFT(get_bits_count(&s->gb), 3), 4);
 631             if (bytes > bytestream2_get_bytes_left(&gb)) {
 632                 av_log(avctx, AV_LOG_ERROR, "Bitstream overread error\n");
 633                 ret = AVERROR(EINVAL);
 634                 goto end;
 635             } else
 636                 bytestream2_seek(&gb, bytes, SEEK_CUR);
 637
 638             av_log(avctx, AV_LOG_DEBUG, "End subband coeffs %i extra %i\n", count, count - expected);
 639             s->codebook = 0;
 640
 641             /* Copy last line of coefficients if odd height */
 642             if (highpass_height & 1) {
 643                 memcpy(&coeff_data[highpass_height * highpass_stride],
 644                        &coeff_data[(highpass_height - 1) * highpass_stride],
 645                        highpass_stride * sizeof(*coeff_data));
 646             }
 647         }
 648     }
 649
 650     if (!s->a_width || !s->a_height || s->a_format == AV_PIX_FMT_NONE ||
 651         s->coded_width || s->coded_height || s->coded_format != AV_PIX_FMT_NONE) {
 652         av_log(avctx, AV_LOG_ERROR, "Invalid dimensions\n");
 653         ret = AVERROR(EINVAL);
 654         goto end;
 655     }
 656
 657     if (!got_buffer) {
 658         av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 659         ret = AVERROR(EINVAL);
 660         goto end;
 661     }
 662
 663     planes = av_pix_fmt_count_planes(avctx->pix_fmt);
 664     for (plane = 0; plane < planes && !ret; plane++) {
 665         /* level 1 */
 666         int lowpass_height  = s->plane[plane].band[0][0].height;
 667         int lowpass_width   = s->plane[plane].band[0][0].width;
 668         int highpass_stride = s->plane[plane].band[0][1].stride;
 669         int act_plane = plane == 1 ? 2 : plane == 2 ? 1 : plane;
 670         int16_t *low, *high, *output, *dst;
 671
 672         if (lowpass_height > s->plane[plane].band[0][0].a_height || lowpass_width > s->plane[plane].band[0][0].a_width ||
 673             !highpass_stride || s->plane[plane].band[0][1].width > s->plane[plane].band[0][1].a_width) {
 674             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 675             ret = AVERROR(EINVAL);
 676             goto end;
 677         }
 678
 679         av_log(avctx, AV_LOG_DEBUG, "Decoding level 1 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 680
 681         low    = s->plane[plane].subband[0];
 682         high   = s->plane[plane].subband[2];
 683         output = s->plane[plane].l_h[0];
 684         for (i = 0; i < lowpass_width; i++) {
 685             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 686             low++;
 687             high++;
 688             output++;
 689         }
 690
 691         low    = s->plane[plane].subband[1];
 692         high   = s->plane[plane].subband[3];
 693         output = s->plane[plane].l_h[1];
 694
 695         for (i = 0; i < lowpass_width; i++) {
 696             // note the stride of "low" is highpass_stride
 697             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 698             low++;
 699             high++;
 700             output++;
 701         }
 702
 703         low    = s->plane[plane].l_h[0];
 704         high   = s->plane[plane].l_h[1];
 705         output = s->plane[plane].subband[0];
 706         for (i = 0; i < lowpass_height * 2; i++) {
 707             horiz_filter(output, low, high, lowpass_width);
 708             low    += lowpass_width;
 709             high   += lowpass_width;
 710             output += lowpass_width * 2;
 711         }
 712         if (s->bpc == 12) {
 713             output = s->plane[plane].subband[0];
 714             for (i = 0; i < lowpass_height * 2; i++) {
 715                 for (j = 0; j < lowpass_width * 2; j++)
 716                     output[j] *= 4;
 717
 718                 output += lowpass_width * 2;
 719             }
 720         }
 721
 722         /* level 2 */
 723         lowpass_height  = s->plane[plane].band[1][1].height;
 724         lowpass_width   = s->plane[plane].band[1][1].width;
 725         highpass_stride = s->plane[plane].band[1][1].stride;
 726
 727         if (lowpass_height > s->plane[plane].band[1][1].a_height || lowpass_width > s->plane[plane].band[1][1].a_width ||
 728             !highpass_stride || s->plane[plane].band[1][1].width > s->plane[plane].band[1][1].a_width) {
 729             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 730             ret = AVERROR(EINVAL);
 731             goto end;
 732         }
 733
 734         av_log(avctx, AV_LOG_DEBUG, "Level 2 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 735
 736         low    = s->plane[plane].subband[0];
 737         high   = s->plane[plane].subband[5];
 738         output = s->plane[plane].l_h[3];
 739         for (i = 0; i < lowpass_width; i++) {
 740             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 741             low++;
 742             high++;
 743             output++;
 744         }
 745
 746         low    = s->plane[plane].subband[4];
 747         high   = s->plane[plane].subband[6];
 748         output = s->plane[plane].l_h[4];
 749         for (i = 0; i < lowpass_width; i++) {
 750             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 751             low++;
 752             high++;
 753             output++;
 754         }
 755
 756         low    = s->plane[plane].l_h[3];
 757         high   = s->plane[plane].l_h[4];
 758         output = s->plane[plane].subband[0];
 759         for (i = 0; i < lowpass_height * 2; i++) {
 760             horiz_filter(output, low, high, lowpass_width);
 761             low    += lowpass_width;
 762             high   += lowpass_width;
 763             output += lowpass_width * 2;
 764         }
 765
 766         output = s->plane[plane].subband[0];
 767         for (i = 0; i < lowpass_height * 2; i++) {
 768             for (j = 0; j < lowpass_width * 2; j++)
 769                 output[j] *= 4;
 770
 771             output += lowpass_width * 2;
 772         }
 773
 774         /* level 3 */
 775         lowpass_height  = s->plane[plane].band[2][1].height;
 776         lowpass_width   = s->plane[plane].band[2][1].width;
 777         highpass_stride = s->plane[plane].band[2][1].stride;
 778
 779         if (lowpass_height > s->plane[plane].band[2][1].a_height || lowpass_width > s->plane[plane].band[2][1].a_width ||
 780             !highpass_stride || s->plane[plane].band[2][1].width > s->plane[plane].band[2][1].a_width) {
 781             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 782             ret = AVERROR(EINVAL);
 783             goto end;
 784         }
 785
 786         av_log(avctx, AV_LOG_DEBUG, "Level 3 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 787
 788         low    = s->plane[plane].subband[0];
 789         high   = s->plane[plane].subband[8];
 790         output = s->plane[plane].l_h[6];
 791         for (i = 0; i < lowpass_width; i++) {
 792             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 793             low++;
 794             high++;
 795             output++;
 796         }
 797
 798         low    = s->plane[plane].subband[7];
 799         high   = s->plane[plane].subband[9];
 800         output = s->plane[plane].l_h[7];
 801         for (i = 0; i < lowpass_width; i++) {
 802             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 803             low++;
 804             high++;
 805             output++;
 806         }
 807
 808         dst = (int16_t *)pic->data[act_plane];
 809         low  = s->plane[plane].l_h[6];
 810         high = s->plane[plane].l_h[7];
 811         for (i = 0; i < lowpass_height * 2; i++) {
 812             horiz_filter_clip(dst, low, high, lowpass_width, s->bpc);
 813             if (act_plane == 3)
 814                 process_alpha(dst, lowpass_width * 2);
 815             low  += lowpass_width;
 816             high += lowpass_width;
 817             dst  += pic->linesize[act_plane] / 2;
 818         }
 819     }
 820
 821
 822 end:
 823     if (ret < 0)
 824         return ret;
 825
 826     *got_frame = 1;
 827     return avpkt->size;
 828 }
 829
 830 static av_cold int cfhd_close(AVCodecContext *avctx)
 831 {
 832     CFHDContext *s = avctx->priv_data;
 833
 834     free_buffers(s);
 835
 836     if (!avctx->internal->is_copy) {
 837         ff_free_vlc(&s->vlc_9);
 838         ff_free_vlc(&s->vlc_18);
 839     }
 840
 841     return 0;
 842 }
 843
 844 AVCodec ff_cfhd_decoder = {
 845     .name             = "cfhd",
 846     .long_name        = NULL_IF_CONFIG_SMALL("Cineform HD"),
 847     .type             = AVMEDIA_TYPE_VIDEO,
 848     .id               = AV_CODEC_ID_CFHD,
 849     .priv_data_size   = sizeof(CFHDContext),
 850     .init             = cfhd_init,
 851     .close            = cfhd_close,
 852     .decode           = cfhd_decode,
 853     .capabilities     = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
 854     .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
 855 };