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