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