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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 static av_cold int cfhd_init(AVCodecContext *avctx)
  44 {
  45     CFHDContext *s = avctx->priv_data;
  46
  47     s->avctx                   = avctx;
  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_peak_table_defaults(CFHDContext *s)
  60 {
  61     s->peak.level  = 0;
  62     s->peak.offset = 0;
  63     memset(&s->peak.base, 0, sizeof(s->peak.base));
  64 }
  65
  66 static void init_frame_defaults(CFHDContext *s)
  67 {
  68     s->coded_width       = 0;
  69     s->coded_height      = 0;
  70     s->cropped_height    = 0;
  71     s->bpc               = 10;
  72     s->channel_cnt       = 4;
  73     s->subband_cnt       = SUBBAND_COUNT;
  74     s->channel_num       = 0;
  75     s->lowpass_precision = 16;
  76     s->quantisation      = 1;
  77     s->wavelet_depth     = 3;
  78     s->pshift            = 1;
  79     s->codebook          = 0;
  80     s->difference_coding = 0;
  81     s->progressive       = 0;
  82     init_plane_defaults(s);
  83     init_peak_table_defaults(s);
  84 }
  85
  86 /* TODO: merge with VLC tables or use LUT */
  87 static inline int dequant_and_decompand(int level, int quantisation, int codebook)
  88 {
  89     if (codebook == 0 || codebook == 1) {
  90         int64_t abslevel = abs(level);
  91         if (abslevel < 256)
  92             return (abslevel + ((768 * abslevel * abslevel * abslevel) / (256 * 256 * 256))) *
  93                FFSIGN(level) * quantisation;
  94         else
  95             return level * quantisation;
  96     } else
  97         return level * quantisation;
  98 }
  99
 100 static inline void difference_coding(int16_t *band, int width, int height)
 101 {
 102
 103     int i,j;
 104     for (i = 0; i < height; i++) {
 105         for (j = 1; j < width; j++) {
 106           band[j] += band[j-1];
 107         }
 108         band += width;
 109     }
 110 }
 111
 112 static inline void peak_table(int16_t *band, Peak *peak, int length)
 113 {
 114     int i;
 115     for (i = 0; i < length; i++)
 116         if (abs(band[i]) > peak->level)
 117             band[i] = bytestream2_get_le16(&peak->base);
 118 }
 119
 120 static inline void process_alpha(int16_t *alpha, int width)
 121 {
 122     int i, channel;
 123     for (i = 0; i < width; i++) {
 124         channel   = alpha[i];
 125         channel  -= ALPHA_COMPAND_DC_OFFSET;
 126         channel <<= 3;
 127         channel  *= ALPHA_COMPAND_GAIN;
 128         channel >>= 16;
 129         channel   = av_clip_uintp2(channel, 12);
 130         alpha[i]  = channel;
 131     }
 132 }
 133
 134 static inline void process_bayer(AVFrame *frame)
 135 {
 136     const int linesize = frame->linesize[0];
 137     uint16_t *r = (uint16_t *)frame->data[0];
 138     uint16_t *g1 = (uint16_t *)(frame->data[0] + 2);
 139     uint16_t *g2 = (uint16_t *)(frame->data[0] + frame->linesize[0]);
 140     uint16_t *b = (uint16_t *)(frame->data[0] + frame->linesize[0] + 2);
 141     const int mid = 2048;
 142
 143     for (int y = 0; y < frame->height >> 1; y++) {
 144         for (int x = 0; x < frame->width; x += 2) {
 145             int R, G1, G2, B;
 146             int g, rg, bg, gd;
 147
 148             g  = r[x];
 149             rg = g1[x];
 150             bg = g2[x];
 151             gd = b[x];
 152             gd -= mid;
 153
 154             R  = (rg - mid) * 2 + g;
 155             G1 = g + gd;
 156             G2 = g - gd;
 157             B  = (bg - mid) * 2 + g;
 158
 159             R  = av_clip_uintp2(R  * 16, 16);
 160             G1 = av_clip_uintp2(G1 * 16, 16);
 161             G2 = av_clip_uintp2(G2 * 16, 16);
 162             B  = av_clip_uintp2(B  * 16, 16);
 163
 164             r[x]  = R;
 165             g1[x] = G1;
 166             g2[x] = G2;
 167             b[x]  = B;
 168         }
 169
 170         r  += linesize;
 171         g1 += linesize;
 172         g2 += linesize;
 173         b  += linesize;
 174     }
 175 }
 176
 177 static inline void filter(int16_t *output, ptrdiff_t out_stride,
 178                           int16_t *low, ptrdiff_t low_stride,
 179                           int16_t *high, ptrdiff_t high_stride,
 180                           int len, int clip)
 181 {
 182     int16_t tmp;
 183     int i;
 184
 185     tmp = (11*low[0*low_stride] - 4*low[1*low_stride] + low[2*low_stride] + 4) >> 3;
 186     output[(2*0+0)*out_stride] = (tmp + high[0*high_stride]) >> 1;
 187     if (clip)
 188         output[(2*0+0)*out_stride] = av_clip_uintp2_c(output[(2*0+0)*out_stride], clip);
 189
 190     tmp = ( 5*low[0*low_stride] + 4*low[1*low_stride] - low[2*low_stride] + 4) >> 3;
 191     output[(2*0+1)*out_stride] = (tmp - high[0*high_stride]) >> 1;
 192     if (clip)
 193         output[(2*0+1)*out_stride] = av_clip_uintp2_c(output[(2*0+1)*out_stride], clip);
 194
 195     for (i = 1; i < len - 1; i++) {
 196         tmp = (low[(i-1)*low_stride] - low[(i+1)*low_stride] + 4) >> 3;
 197         output[(2*i+0)*out_stride] = (tmp + low[i*low_stride] + high[i*high_stride]) >> 1;
 198         if (clip)
 199             output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
 200
 201         tmp = (low[(i+1)*low_stride] - low[(i-1)*low_stride] + 4) >> 3;
 202         output[(2*i+1)*out_stride] = (tmp + low[i*low_stride] - high[i*high_stride]) >> 1;
 203         if (clip)
 204             output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
 205     }
 206
 207     tmp = ( 5*low[i*low_stride] + 4*low[(i-1)*low_stride] - low[(i-2)*low_stride] + 4) >> 3;
 208     output[(2*i+0)*out_stride] = (tmp + high[i*high_stride]) >> 1;
 209     if (clip)
 210         output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
 211
 212     tmp = (11*low[i*low_stride] - 4*low[(i-1)*low_stride] + low[(i-2)*low_stride] + 4) >> 3;
 213     output[(2*i+1)*out_stride] = (tmp - high[i*high_stride]) >> 1;
 214     if (clip)
 215         output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
 216 }
 217
 218 static inline void interlaced_vertical_filter(int16_t *output, int16_t *low, int16_t *high,
 219                          int width, int linesize, int plane)
 220 {
 221     int i;
 222     int16_t even, odd;
 223     for (i = 0; i < width; i++) {
 224         even = (low[i] - high[i])/2;
 225         odd  = (low[i] + high[i])/2;
 226         output[i]            = av_clip_uintp2(even, 10);
 227         output[i + linesize] = av_clip_uintp2(odd, 10);
 228     }
 229 }
 230 static void horiz_filter(int16_t *output, int16_t *low, int16_t *high,
 231                          int width)
 232 {
 233     filter(output, 1, low, 1, high, 1, width, 0);
 234 }
 235
 236 static void horiz_filter_clip(int16_t *output, int16_t *low, int16_t *high,
 237                               int width, int clip)
 238 {
 239     filter(output, 1, low, 1, high, 1, width, clip);
 240 }
 241
 242 static void horiz_filter_clip_bayer(int16_t *output, int16_t *low, int16_t *high,
 243                                     int width, int clip)
 244 {
 245     filter(output, 2, low, 1, high, 1, width, clip);
 246 }
 247
 248 static void vert_filter(int16_t *output, ptrdiff_t out_stride,
 249                         int16_t *low, ptrdiff_t low_stride,
 250                         int16_t *high, ptrdiff_t high_stride, int len)
 251 {
 252     filter(output, out_stride, low, low_stride, high, high_stride, len, 0);
 253 }
 254
 255 static void free_buffers(CFHDContext *s)
 256 {
 257     int i, j;
 258
 259     for (i = 0; i < FF_ARRAY_ELEMS(s->plane); i++) {
 260         av_freep(&s->plane[i].idwt_buf);
 261         av_freep(&s->plane[i].idwt_tmp);
 262
 263         for (j = 0; j < 9; j++)
 264             s->plane[i].subband[j] = NULL;
 265
 266         for (j = 0; j < 8; j++)
 267             s->plane[i].l_h[j] = NULL;
 268     }
 269     s->a_height = 0;
 270     s->a_width  = 0;
 271 }
 272
 273 static int alloc_buffers(AVCodecContext *avctx)
 274 {
 275     CFHDContext *s = avctx->priv_data;
 276     int i, j, ret, planes;
 277     int chroma_x_shift, chroma_y_shift;
 278     unsigned k;
 279
 280     if (s->coded_format == AV_PIX_FMT_BAYER_RGGB16) {
 281         s->coded_width *= 2;
 282         s->coded_height *= 2;
 283     }
 284
 285     if ((ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height)) < 0)
 286         return ret;
 287     avctx->pix_fmt = s->coded_format;
 288
 289     if ((ret = av_pix_fmt_get_chroma_sub_sample(s->coded_format,
 290                                                 &chroma_x_shift,
 291                                                 &chroma_y_shift)) < 0)
 292         return ret;
 293     planes = av_pix_fmt_count_planes(s->coded_format);
 294     if (s->coded_format == AV_PIX_FMT_BAYER_RGGB16) {
 295         planes = 4;
 296         chroma_x_shift = 1;
 297         chroma_y_shift = 1;
 298     }
 299
 300     for (i = 0; i < planes; i++) {
 301         int w8, h8, w4, h4, w2, h2;
 302         int width  = i ? avctx->width  >> chroma_x_shift : avctx->width;
 303         int height = i ? avctx->height >> chroma_y_shift : avctx->height;
 304         ptrdiff_t stride = FFALIGN(width  / 8, 8) * 8;
 305         if (chroma_y_shift)
 306             height = FFALIGN(height / 8, 2) * 8;
 307         s->plane[i].width  = width;
 308         s->plane[i].height = height;
 309         s->plane[i].stride = stride;
 310
 311         w8 = FFALIGN(s->plane[i].width  / 8, 8);
 312         h8 = FFALIGN(height, 8) / 8;
 313         w4 = w8 * 2;
 314         h4 = h8 * 2;
 315         w2 = w4 * 2;
 316         h2 = h4 * 2;
 317
 318         s->plane[i].idwt_buf =
 319             av_mallocz_array(FFALIGN(height, 8) * stride, sizeof(*s->plane[i].idwt_buf));
 320         s->plane[i].idwt_tmp =
 321             av_malloc_array(FFALIGN(height, 8) * stride, sizeof(*s->plane[i].idwt_tmp));
 322         if (!s->plane[i].idwt_buf || !s->plane[i].idwt_tmp)
 323             return AVERROR(ENOMEM);
 324
 325         s->plane[i].subband[0] = s->plane[i].idwt_buf;
 326         s->plane[i].subband[1] = s->plane[i].idwt_buf + 2 * w8 * h8;
 327         s->plane[i].subband[2] = s->plane[i].idwt_buf + 1 * w8 * h8;
 328         s->plane[i].subband[3] = s->plane[i].idwt_buf + 3 * w8 * h8;
 329         s->plane[i].subband[4] = s->plane[i].idwt_buf + 2 * w4 * h4;
 330         s->plane[i].subband[5] = s->plane[i].idwt_buf + 1 * w4 * h4;
 331         s->plane[i].subband[6] = s->plane[i].idwt_buf + 3 * w4 * h4;
 332         s->plane[i].subband[7] = s->plane[i].idwt_buf + 2 * w2 * h2;
 333         s->plane[i].subband[8] = s->plane[i].idwt_buf + 1 * w2 * h2;
 334         s->plane[i].subband[9] = s->plane[i].idwt_buf + 3 * w2 * h2;
 335
 336         for (j = 0; j < DWT_LEVELS; j++) {
 337             for (k = 0; k < FF_ARRAY_ELEMS(s->plane[i].band[j]); k++) {
 338                 s->plane[i].band[j][k].a_width  = w8 << j;
 339                 s->plane[i].band[j][k].a_height = h8 << j;
 340             }
 341         }
 342
 343         /* ll2 and ll1 commented out because they are done in-place */
 344         s->plane[i].l_h[0] = s->plane[i].idwt_tmp;
 345         s->plane[i].l_h[1] = s->plane[i].idwt_tmp + 2 * w8 * h8;
 346         // s->plane[i].l_h[2] = ll2;
 347         s->plane[i].l_h[3] = s->plane[i].idwt_tmp;
 348         s->plane[i].l_h[4] = s->plane[i].idwt_tmp + 2 * w4 * h4;
 349         // s->plane[i].l_h[5] = ll1;
 350         s->plane[i].l_h[6] = s->plane[i].idwt_tmp;
 351         s->plane[i].l_h[7] = s->plane[i].idwt_tmp + 2 * w2 * h2;
 352     }
 353
 354     s->a_height = s->coded_height;
 355     s->a_width  = s->coded_width;
 356     s->a_format = s->coded_format;
 357
 358     return 0;
 359 }
 360
 361 static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
 362                        AVPacket *avpkt)
 363 {
 364     CFHDContext *s = avctx->priv_data;
 365     GetByteContext gb;
 366     ThreadFrame frame = { .f = data };
 367     AVFrame *pic = data;
 368     int ret = 0, i, j, planes, plane, got_buffer = 0;
 369     int16_t *coeff_data;
 370
 371     s->coded_format = AV_PIX_FMT_YUV422P10;
 372     init_frame_defaults(s);
 373     planes = av_pix_fmt_count_planes(s->coded_format);
 374
 375     bytestream2_init(&gb, avpkt->data, avpkt->size);
 376
 377     while (bytestream2_get_bytes_left(&gb) > 4) {
 378         /* Bit weird but implement the tag parsing as the spec says */
 379         uint16_t tagu   = bytestream2_get_be16(&gb);
 380         int16_t tag     = (int16_t)tagu;
 381         int8_t tag8     = (int8_t)(tagu >> 8);
 382         uint16_t abstag = abs(tag);
 383         int8_t abs_tag8 = abs(tag8);
 384         uint16_t data   = bytestream2_get_be16(&gb);
 385         if (abs_tag8 >= 0x60 && abs_tag8 <= 0x6f) {
 386             av_log(avctx, AV_LOG_DEBUG, "large len %x\n", ((tagu & 0xff) << 16) | data);
 387         } else if (tag == SampleFlags) {
 388             av_log(avctx, AV_LOG_DEBUG, "Progressive?%"PRIu16"\n", data);
 389             s->progressive = data & 0x0001;
 390         } else if (tag == ImageWidth) {
 391             av_log(avctx, AV_LOG_DEBUG, "Width %"PRIu16"\n", data);
 392             s->coded_width = data;
 393         } else if (tag == ImageHeight) {
 394             av_log(avctx, AV_LOG_DEBUG, "Height %"PRIu16"\n", data);
 395             s->coded_height = data;
 396         } else if (tag == BitsPerComponent) {
 397             av_log(avctx, AV_LOG_DEBUG, "Bits per component: %"PRIu16"\n", data);
 398             if (data < 1 || data > 31) {
 399                 av_log(avctx, AV_LOG_ERROR, "Bits per component %d is invalid\n", data);
 400                 ret = AVERROR(EINVAL);
 401                 break;
 402             }
 403             s->bpc = data;
 404         } else if (tag == ChannelCount) {
 405             av_log(avctx, AV_LOG_DEBUG, "Channel Count: %"PRIu16"\n", data);
 406             s->channel_cnt = data;
 407             if (data > 4) {
 408                 av_log(avctx, AV_LOG_ERROR, "Channel Count of %"PRIu16" is unsupported\n", data);
 409                 ret = AVERROR_PATCHWELCOME;
 410                 break;
 411             }
 412         } else if (tag == SubbandCount) {
 413             av_log(avctx, AV_LOG_DEBUG, "Subband Count: %"PRIu16"\n", data);
 414             if (data != SUBBAND_COUNT) {
 415                 av_log(avctx, AV_LOG_ERROR, "Subband Count of %"PRIu16" is unsupported\n", data);
 416                 ret = AVERROR_PATCHWELCOME;
 417                 break;
 418             }
 419         } else if (tag == ChannelNumber) {
 420             s->channel_num = data;
 421             av_log(avctx, AV_LOG_DEBUG, "Channel number %"PRIu16"\n", data);
 422             if (s->channel_num >= planes) {
 423                 av_log(avctx, AV_LOG_ERROR, "Invalid channel number\n");
 424                 ret = AVERROR(EINVAL);
 425                 break;
 426             }
 427             init_plane_defaults(s);
 428         } else if (tag == SubbandNumber) {
 429             if (s->subband_num != 0 && data == 1)  // hack
 430                 s->level++;
 431             av_log(avctx, AV_LOG_DEBUG, "Subband number %"PRIu16"\n", data);
 432             s->subband_num = data;
 433             if (s->level >= DWT_LEVELS) {
 434                 av_log(avctx, AV_LOG_ERROR, "Invalid level\n");
 435                 ret = AVERROR(EINVAL);
 436                 break;
 437             }
 438             if (s->subband_num > 3) {
 439                 av_log(avctx, AV_LOG_ERROR, "Invalid subband number\n");
 440                 ret = AVERROR(EINVAL);
 441                 break;
 442             }
 443         } else if (tag == SubbandBand) {
 444             av_log(avctx, AV_LOG_DEBUG, "Subband number actual %"PRIu16"\n", data);
 445             s->subband_num_actual = data;
 446             if (s->subband_num_actual >= 10) {
 447                 av_log(avctx, AV_LOG_ERROR, "Invalid subband number actual\n");
 448                 ret = AVERROR(EINVAL);
 449                 break;
 450             }
 451         } else if (tag == LowpassPrecision)
 452             av_log(avctx, AV_LOG_DEBUG, "Lowpass precision bits: %"PRIu16"\n", data);
 453         else if (tag == Quantization) {
 454             s->quantisation = data;
 455             av_log(avctx, AV_LOG_DEBUG, "Quantisation: %"PRIu16"\n", data);
 456         } else if (tag == PrescaleShift) {
 457             s->prescale_shift[0] = (data >> 0) & 0x7;
 458             s->prescale_shift[1] = (data >> 3) & 0x7;
 459             s->prescale_shift[2] = (data >> 6) & 0x7;
 460             av_log(avctx, AV_LOG_DEBUG, "Prescale shift (VC-5): %x\n", data);
 461         } else if (tag == LowpassWidth) {
 462             av_log(avctx, AV_LOG_DEBUG, "Lowpass width %"PRIu16"\n", data);
 463             if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_width) {
 464                 av_log(avctx, AV_LOG_ERROR, "Invalid lowpass width\n");
 465                 ret = AVERROR(EINVAL);
 466                 break;
 467             }
 468             s->plane[s->channel_num].band[0][0].width  = data;
 469             s->plane[s->channel_num].band[0][0].stride = data;
 470         } else if (tag == LowpassHeight) {
 471             av_log(avctx, AV_LOG_DEBUG, "Lowpass height %"PRIu16"\n", data);
 472             if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_height) {
 473                 av_log(avctx, AV_LOG_ERROR, "Invalid lowpass height\n");
 474                 ret = AVERROR(EINVAL);
 475                 break;
 476             }
 477             s->plane[s->channel_num].band[0][0].height = data;
 478         } else if (tag == SampleType)
 479             av_log(avctx, AV_LOG_DEBUG, "Sample type? %"PRIu16"\n", data);
 480         else if (tag == TransformType) {
 481             if (data != 0) {
 482                 avpriv_report_missing_feature(avctx, "Transform type of %"PRIu16, data);
 483                 ret = AVERROR_PATCHWELCOME;
 484                 break;
 485             }
 486             av_log(avctx, AV_LOG_DEBUG, "Transform-type? %"PRIu16"\n", data);
 487         } else if (abstag >= 0x4000 && abstag <= 0x40ff) {
 488             if (abstag == 0x4001)
 489                 s->peak.level = 0;
 490             av_log(avctx, AV_LOG_DEBUG, "Small chunk length %d %s\n", data * 4, tag < 0 ? "optional" : "required");
 491             bytestream2_skipu(&gb, data * 4);
 492         } else if (tag == 23) {
 493             av_log(avctx, AV_LOG_DEBUG, "Skip frame\n");
 494             avpriv_report_missing_feature(avctx, "Skip frame");
 495             ret = AVERROR_PATCHWELCOME;
 496             break;
 497         } else if (tag == SampleIndexTable) {
 498             av_log(avctx, AV_LOG_DEBUG, "tag=2 header - skipping %i tag/value pairs\n", data);
 499             if (data > bytestream2_get_bytes_left(&gb) / 4) {
 500                 av_log(avctx, AV_LOG_ERROR, "too many tag/value pairs (%d)\n", data);
 501                 ret = AVERROR_INVALIDDATA;
 502                 break;
 503             }
 504             for (i = 0; i < data; i++) {
 505                 uint16_t tag2 = bytestream2_get_be16(&gb);
 506                 uint16_t val2 = bytestream2_get_be16(&gb);
 507                 av_log(avctx, AV_LOG_DEBUG, "Tag/Value = %x %x\n", tag2, val2);
 508             }
 509         } else if (tag == HighpassWidth) {
 510             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);
 511             if (data < 3) {
 512                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass width\n");
 513                 ret = AVERROR(EINVAL);
 514                 break;
 515             }
 516             s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;
 517             s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
 518         } else if (tag == HighpassHeight) {
 519             av_log(avctx, AV_LOG_DEBUG, "Highpass height %i\n", data);
 520             if (data < 3) {
 521                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass height\n");
 522                 ret = AVERROR(EINVAL);
 523                 break;
 524             }
 525             s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
 526         } else if (tag == BandWidth) {
 527             av_log(avctx, AV_LOG_DEBUG, "Highpass width2 %i\n", data);
 528             if (data < 3) {
 529                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass width2\n");
 530                 ret = AVERROR(EINVAL);
 531                 break;
 532             }
 533             s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;
 534             s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
 535         } else if (tag == BandHeight) {
 536             av_log(avctx, AV_LOG_DEBUG, "Highpass height2 %i\n", data);
 537             if (data < 3) {
 538                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass height2\n");
 539                 ret = AVERROR(EINVAL);
 540                 break;
 541             }
 542             s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
 543         } else if (tag == 71) {
 544             s->codebook = data;
 545             av_log(avctx, AV_LOG_DEBUG, "Codebook %i\n", s->codebook);
 546         } else if (tag == BandCodingFlags) {
 547             s->codebook = data & 0xf;
 548             s->difference_coding = (data >> 4) & 1;
 549             av_log(avctx, AV_LOG_DEBUG, "Other codebook? %i\n", s->codebook);
 550         } else if (tag == Precision) {
 551             av_log(avctx, AV_LOG_DEBUG, "Precision %i\n", data);
 552             if (!(data == 10 || data == 12)) {
 553                 av_log(avctx, AV_LOG_ERROR, "Invalid bits per channel\n");
 554                 ret = AVERROR(EINVAL);
 555                 break;
 556             }
 557             avctx->bits_per_raw_sample = s->bpc = data;
 558         } else if (tag == EncodedFormat) {
 559             av_log(avctx, AV_LOG_DEBUG, "Sample format? %i\n", data);
 560             if (data == 1) {
 561                 s->coded_format = AV_PIX_FMT_YUV422P10;
 562             } else if (data == 2) {
 563                 s->coded_format = AV_PIX_FMT_BAYER_RGGB16;
 564             } else if (data == 3) {
 565                 s->coded_format = AV_PIX_FMT_GBRP12;
 566             } else if (data == 4) {
 567                 s->coded_format = AV_PIX_FMT_GBRAP12;
 568             } else {
 569                 avpriv_report_missing_feature(avctx, "Sample format of %"PRIu16, data);
 570                 ret = AVERROR_PATCHWELCOME;
 571                 break;
 572             }
 573             planes = data == 2 ? 4 : av_pix_fmt_count_planes(s->coded_format);
 574         } else if (tag == -85) {
 575             av_log(avctx, AV_LOG_DEBUG, "Cropped height %"PRIu16"\n", data);
 576             s->cropped_height = data;
 577         } else if (tag == -75) {
 578             s->peak.offset &= ~0xffff;
 579             s->peak.offset |= (data & 0xffff);
 580             s->peak.base    = gb;
 581             s->peak.level   = 0;
 582         } else if (tag == -76) {
 583             s->peak.offset &= 0xffff;
 584             s->peak.offset |= (data & 0xffffU)<<16;
 585             s->peak.base    = gb;
 586             s->peak.level   = 0;
 587         } else if (tag == -74 && s->peak.offset) {
 588             s->peak.level = data;
 589             bytestream2_seek(&s->peak.base, s->peak.offset - 4, SEEK_CUR);
 590         } else
 591             av_log(avctx, AV_LOG_DEBUG,  "Unknown tag %i data %x\n", tag, data);
 592
 593         /* Some kind of end of header tag */
 594         if (tag == BitstreamMarker && data == 0x1a4a && s->coded_width && s->coded_height &&
 595             s->coded_format != AV_PIX_FMT_NONE) {
 596             if (s->a_width != s->coded_width || s->a_height != s->coded_height ||
 597                 s->a_format != s->coded_format) {
 598                 free_buffers(s);
 599                 if ((ret = alloc_buffers(avctx)) < 0) {
 600                     free_buffers(s);
 601                     return ret;
 602                 }
 603             }
 604             ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height);
 605             if (ret < 0)
 606                 return ret;
 607             if (s->cropped_height) {
 608                 unsigned height = s->cropped_height << (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16);
 609                 if (avctx->height < height)
 610                     return AVERROR_INVALIDDATA;
 611                 avctx->height = height;
 612             }
 613             frame.f->width =
 614             frame.f->height = 0;
 615
 616             if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
 617                 return ret;
 618
 619             s->coded_width = 0;
 620             s->coded_height = 0;
 621             s->coded_format = AV_PIX_FMT_NONE;
 622             got_buffer = 1;
 623         }
 624         coeff_data = s->plane[s->channel_num].subband[s->subband_num_actual];
 625
 626         /* Lowpass coefficients */
 627         if (tag == BitstreamMarker && data == 0xf0f && s->a_width && s->a_height) {
 628             int lowpass_height = s->plane[s->channel_num].band[0][0].height;
 629             int lowpass_width  = s->plane[s->channel_num].band[0][0].width;
 630             int lowpass_a_height = s->plane[s->channel_num].band[0][0].a_height;
 631             int lowpass_a_width  = s->plane[s->channel_num].band[0][0].a_width;
 632
 633             if (!got_buffer) {
 634                 av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 635                 ret = AVERROR(EINVAL);
 636                 goto end;
 637             }
 638
 639             if (lowpass_height > lowpass_a_height || lowpass_width > lowpass_a_width ||
 640                 lowpass_a_width * lowpass_a_height * sizeof(int16_t) > bytestream2_get_bytes_left(&gb)) {
 641                 av_log(avctx, AV_LOG_ERROR, "Too many lowpass coefficients\n");
 642                 ret = AVERROR(EINVAL);
 643                 goto end;
 644             }
 645
 646             av_log(avctx, AV_LOG_DEBUG, "Start of lowpass coeffs component %d height:%d, width:%d\n", s->channel_num, lowpass_height, lowpass_width);
 647             for (i = 0; i < lowpass_height; i++) {
 648                 for (j = 0; j < lowpass_width; j++)
 649                     coeff_data[j] = bytestream2_get_be16u(&gb);
 650
 651                 coeff_data += lowpass_width;
 652             }
 653
 654             /* Align to mod-4 position to continue reading tags */
 655             bytestream2_seek(&gb, bytestream2_tell(&gb) & 3, SEEK_CUR);
 656
 657             /* Copy last line of coefficients if odd height */
 658             if (lowpass_height & 1) {
 659                 memcpy(&coeff_data[lowpass_height * lowpass_width],
 660                        &coeff_data[(lowpass_height - 1) * lowpass_width],
 661                        lowpass_width * sizeof(*coeff_data));
 662             }
 663
 664             av_log(avctx, AV_LOG_DEBUG, "Lowpass coefficients %d\n", lowpass_width * lowpass_height);
 665         }
 666
 667         if (tag == BandHeader && s->subband_num_actual != 255 && s->a_width && s->a_height) {
 668             int highpass_height = s->plane[s->channel_num].band[s->level][s->subband_num].height;
 669             int highpass_width  = s->plane[s->channel_num].band[s->level][s->subband_num].width;
 670             int highpass_a_width = s->plane[s->channel_num].band[s->level][s->subband_num].a_width;
 671             int highpass_a_height = s->plane[s->channel_num].band[s->level][s->subband_num].a_height;
 672             int highpass_stride = s->plane[s->channel_num].band[s->level][s->subband_num].stride;
 673             int expected;
 674             int a_expected = highpass_a_height * highpass_a_width;
 675             int level, run, coeff;
 676             int count = 0, bytes;
 677
 678             if (!got_buffer) {
 679                 av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 680                 ret = AVERROR(EINVAL);
 681                 goto end;
 682             }
 683
 684             if (highpass_height > highpass_a_height || highpass_width > highpass_a_width || a_expected < highpass_height * (uint64_t)highpass_stride) {
 685                 av_log(avctx, AV_LOG_ERROR, "Too many highpass coefficients\n");
 686                 ret = AVERROR(EINVAL);
 687                 goto end;
 688             }
 689             expected = highpass_height * highpass_stride;
 690
 691             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);
 692
 693             init_get_bits(&s->gb, gb.buffer, bytestream2_get_bytes_left(&gb) * 8);
 694             {
 695                 OPEN_READER(re, &s->gb);
 696                 if (!s->codebook) {
 697                     while (1) {
 698                         UPDATE_CACHE(re, &s->gb);
 699                         GET_RL_VLC(level, run, re, &s->gb, s->table_9_rl_vlc,
 700                                    VLC_BITS, 3, 1);
 701
 702                         /* escape */
 703                         if (level == 64)
 704                             break;
 705
 706                         count += run;
 707
 708                         if (count > expected)
 709                             break;
 710
 711                         coeff = dequant_and_decompand(level, s->quantisation, 0);
 712                         for (i = 0; i < run; i++)
 713                             *coeff_data++ = coeff;
 714                     }
 715                 } else {
 716                     while (1) {
 717                         UPDATE_CACHE(re, &s->gb);
 718                         GET_RL_VLC(level, run, re, &s->gb, s->table_18_rl_vlc,
 719                                    VLC_BITS, 3, 1);
 720
 721                         /* escape */
 722                         if (level == 255 && run == 2)
 723                             break;
 724
 725                         count += run;
 726
 727                         if (count > expected)
 728                             break;
 729
 730                         coeff = dequant_and_decompand(level, s->quantisation, s->codebook);
 731                         for (i = 0; i < run; i++)
 732                             *coeff_data++ = coeff;
 733                     }
 734                 }
 735                 CLOSE_READER(re, &s->gb);
 736             }
 737
 738             if (count > expected) {
 739                 av_log(avctx, AV_LOG_ERROR, "Escape codeword not found, probably corrupt data\n");
 740                 ret = AVERROR(EINVAL);
 741                 goto end;
 742             }
 743             if (s->peak.level)
 744                 peak_table(coeff_data - count, &s->peak, count);
 745             if (s->difference_coding)
 746                 difference_coding(s->plane[s->channel_num].subband[s->subband_num_actual], highpass_width, highpass_height);
 747
 748             bytes = FFALIGN(AV_CEIL_RSHIFT(get_bits_count(&s->gb), 3), 4);
 749             if (bytes > bytestream2_get_bytes_left(&gb)) {
 750                 av_log(avctx, AV_LOG_ERROR, "Bitstream overread error\n");
 751                 ret = AVERROR(EINVAL);
 752                 goto end;
 753             } else
 754                 bytestream2_seek(&gb, bytes, SEEK_CUR);
 755
 756             av_log(avctx, AV_LOG_DEBUG, "End subband coeffs %i extra %i\n", count, count - expected);
 757             s->codebook = 0;
 758
 759             /* Copy last line of coefficients if odd height */
 760             if (highpass_height & 1) {
 761                 memcpy(&coeff_data[highpass_height * highpass_stride],
 762                        &coeff_data[(highpass_height - 1) * highpass_stride],
 763                        highpass_stride * sizeof(*coeff_data));
 764             }
 765         }
 766     }
 767
 768     if (!s->a_width || !s->a_height || s->a_format == AV_PIX_FMT_NONE ||
 769         s->coded_width || s->coded_height || s->coded_format != AV_PIX_FMT_NONE) {
 770         av_log(avctx, AV_LOG_ERROR, "Invalid dimensions\n");
 771         ret = AVERROR(EINVAL);
 772         goto end;
 773     }
 774
 775     if (!got_buffer) {
 776         av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 777         ret = AVERROR(EINVAL);
 778         goto end;
 779     }
 780
 781     planes = av_pix_fmt_count_planes(avctx->pix_fmt);
 782     if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16) {
 783         if (!s->progressive)
 784             return AVERROR_INVALIDDATA;
 785         planes = 4;
 786     }
 787
 788     for (plane = 0; plane < planes && !ret; plane++) {
 789         /* level 1 */
 790         int lowpass_height  = s->plane[plane].band[0][0].height;
 791         int lowpass_width   = s->plane[plane].band[0][0].width;
 792         int highpass_stride = s->plane[plane].band[0][1].stride;
 793         int act_plane = plane == 1 ? 2 : plane == 2 ? 1 : plane;
 794         ptrdiff_t dst_linesize;
 795         int16_t *low, *high, *output, *dst;
 796
 797         if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16) {
 798             act_plane = 0;
 799             dst_linesize = pic->linesize[act_plane];
 800         } else {
 801             dst_linesize = pic->linesize[act_plane] / 2;
 802         }
 803
 804         if (lowpass_height > s->plane[plane].band[0][0].a_height || lowpass_width > s->plane[plane].band[0][0].a_width ||
 805             !highpass_stride || s->plane[plane].band[0][1].width > s->plane[plane].band[0][1].a_width) {
 806             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 807             ret = AVERROR(EINVAL);
 808             goto end;
 809         }
 810
 811         av_log(avctx, AV_LOG_DEBUG, "Decoding level 1 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 812
 813         low    = s->plane[plane].subband[0];
 814         high   = s->plane[plane].subband[2];
 815         output = s->plane[plane].l_h[0];
 816         for (i = 0; i < lowpass_width; i++) {
 817             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 818             low++;
 819             high++;
 820             output++;
 821         }
 822
 823         low    = s->plane[plane].subband[1];
 824         high   = s->plane[plane].subband[3];
 825         output = s->plane[plane].l_h[1];
 826
 827         for (i = 0; i < lowpass_width; i++) {
 828             // note the stride of "low" is highpass_stride
 829             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 830             low++;
 831             high++;
 832             output++;
 833         }
 834
 835         low    = s->plane[plane].l_h[0];
 836         high   = s->plane[plane].l_h[1];
 837         output = s->plane[plane].subband[0];
 838         for (i = 0; i < lowpass_height * 2; i++) {
 839             horiz_filter(output, low, high, lowpass_width);
 840             low    += lowpass_width;
 841             high   += lowpass_width;
 842             output += lowpass_width * 2;
 843         }
 844         if (s->bpc == 12) {
 845             output = s->plane[plane].subband[0];
 846             for (i = 0; i < lowpass_height * 2; i++) {
 847                 for (j = 0; j < lowpass_width * 2; j++)
 848                     output[j] *= 4;
 849
 850                 output += lowpass_width * 2;
 851             }
 852         }
 853
 854         /* level 2 */
 855         lowpass_height  = s->plane[plane].band[1][1].height;
 856         lowpass_width   = s->plane[plane].band[1][1].width;
 857         highpass_stride = s->plane[plane].band[1][1].stride;
 858
 859         if (lowpass_height > s->plane[plane].band[1][1].a_height || lowpass_width > s->plane[plane].band[1][1].a_width ||
 860             !highpass_stride || s->plane[plane].band[1][1].width > s->plane[plane].band[1][1].a_width) {
 861             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 862             ret = AVERROR(EINVAL);
 863             goto end;
 864         }
 865
 866         av_log(avctx, AV_LOG_DEBUG, "Level 2 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 867
 868         low    = s->plane[plane].subband[0];
 869         high   = s->plane[plane].subband[5];
 870         output = s->plane[plane].l_h[3];
 871         for (i = 0; i < lowpass_width; i++) {
 872             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 873             low++;
 874             high++;
 875             output++;
 876         }
 877
 878         low    = s->plane[plane].subband[4];
 879         high   = s->plane[plane].subband[6];
 880         output = s->plane[plane].l_h[4];
 881         for (i = 0; i < lowpass_width; i++) {
 882             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 883             low++;
 884             high++;
 885             output++;
 886         }
 887
 888         low    = s->plane[plane].l_h[3];
 889         high   = s->plane[plane].l_h[4];
 890         output = s->plane[plane].subband[0];
 891         for (i = 0; i < lowpass_height * 2; i++) {
 892             horiz_filter(output, low, high, lowpass_width);
 893             low    += lowpass_width;
 894             high   += lowpass_width;
 895             output += lowpass_width * 2;
 896         }
 897
 898         output = s->plane[plane].subband[0];
 899         for (i = 0; i < lowpass_height * 2; i++) {
 900             for (j = 0; j < lowpass_width * 2; j++)
 901                 output[j] *= 4;
 902
 903             output += lowpass_width * 2;
 904         }
 905
 906         /* level 3 */
 907         lowpass_height  = s->plane[plane].band[2][1].height;
 908         lowpass_width   = s->plane[plane].band[2][1].width;
 909         highpass_stride = s->plane[plane].band[2][1].stride;
 910
 911         if (lowpass_height > s->plane[plane].band[2][1].a_height || lowpass_width > s->plane[plane].band[2][1].a_width ||
 912             !highpass_stride || s->plane[plane].band[2][1].width > s->plane[plane].band[2][1].a_width) {
 913             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 914             ret = AVERROR(EINVAL);
 915             goto end;
 916         }
 917
 918         av_log(avctx, AV_LOG_DEBUG, "Level 3 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 919         if (s->progressive) {
 920             low    = s->plane[plane].subband[0];
 921             high   = s->plane[plane].subband[8];
 922             output = s->plane[plane].l_h[6];
 923             for (i = 0; i < lowpass_width; i++) {
 924                 vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 925                 low++;
 926                 high++;
 927                 output++;
 928             }
 929
 930             low    = s->plane[plane].subband[7];
 931             high   = s->plane[plane].subband[9];
 932             output = s->plane[plane].l_h[7];
 933             for (i = 0; i < lowpass_width; i++) {
 934                 vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 935                 low++;
 936                 high++;
 937                 output++;
 938             }
 939
 940             dst = (int16_t *)pic->data[act_plane];
 941             if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16) {
 942                 if (plane & 1)
 943                     dst++;
 944                 if (plane > 1)
 945                     dst += pic->linesize[act_plane] >> 1;
 946             }
 947             low  = s->plane[plane].l_h[6];
 948             high = s->plane[plane].l_h[7];
 949
 950             if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16 &&
 951                 (lowpass_height * 2 > avctx->coded_height / 2 ||
 952                  lowpass_width  * 2 > avctx->coded_width  / 2    )
 953                 ) {
 954                 ret = AVERROR_INVALIDDATA;
 955                 goto end;
 956             }
 957
 958             for (i = 0; i < lowpass_height * 2; i++) {
 959                 if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16)
 960                     horiz_filter_clip_bayer(dst, low, high, lowpass_width, s->bpc);
 961                 else
 962                     horiz_filter_clip(dst, low, high, lowpass_width, s->bpc);
 963                 if (avctx->pix_fmt == AV_PIX_FMT_GBRAP12 && act_plane == 3)
 964                     process_alpha(dst, lowpass_width * 2);
 965                 low  += lowpass_width;
 966                 high += lowpass_width;
 967                 dst  += dst_linesize;
 968             }
 969         } else {
 970             av_log(avctx, AV_LOG_DEBUG, "interlaced frame ? %d", pic->interlaced_frame);
 971             pic->interlaced_frame = 1;
 972             low    = s->plane[plane].subband[0];
 973             high   = s->plane[plane].subband[7];
 974             output = s->plane[plane].l_h[6];
 975             for (i = 0; i < lowpass_height; i++) {
 976                 horiz_filter(output, low, high, lowpass_width);
 977                 low    += lowpass_width;
 978                 high   += lowpass_width;
 979                 output += lowpass_width * 2;
 980             }
 981
 982             low    = s->plane[plane].subband[8];
 983             high   = s->plane[plane].subband[9];
 984             output = s->plane[plane].l_h[7];
 985             for (i = 0; i < lowpass_height; i++) {
 986                 horiz_filter(output, low, high, lowpass_width);
 987                 low    += lowpass_width;
 988                 high   += lowpass_width;
 989                 output += lowpass_width * 2;
 990             }
 991
 992             dst  = (int16_t *)pic->data[act_plane];
 993             low  = s->plane[plane].l_h[6];
 994             high = s->plane[plane].l_h[7];
 995             for (i = 0; i < lowpass_height; i++) {
 996                 interlaced_vertical_filter(dst, low, high, lowpass_width * 2,  pic->linesize[act_plane]/2, act_plane);
 997                 low  += lowpass_width * 2;
 998                 high += lowpass_width * 2;
 999                 dst  += pic->linesize[act_plane];
1000             }
1001         }
1002     }
1003
1004
1005     if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16)
1006         process_bayer(pic);
1007 end:
1008     if (ret < 0)
1009         return ret;
1010
1011     *got_frame = 1;
1012     return avpkt->size;
1013 }
1014
1015 static av_cold int cfhd_close(AVCodecContext *avctx)
1016 {
1017     CFHDContext *s = avctx->priv_data;
1018
1019     free_buffers(s);
1020
1021     ff_free_vlc(&s->vlc_9);
1022     ff_free_vlc(&s->vlc_18);
1023
1024     return 0;
1025 }
1026
1027 AVCodec ff_cfhd_decoder = {
1028     .name             = "cfhd",
1029     .long_name        = NULL_IF_CONFIG_SMALL("Cineform HD"),
1030     .type             = AVMEDIA_TYPE_VIDEO,
1031     .id               = AV_CODEC_ID_CFHD,
1032     .priv_data_size   = sizeof(CFHDContext),
1033     .init             = cfhd_init,
1034     .close            = cfhd_close,
1035     .decode           = cfhd_decode,
1036     .capabilities     = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
1037     .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
1038 };