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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     for (int i = 0; i < 64; i++) {
  50         int val = i;
  51
  52         if (val >= 40) {
  53             if (val >= 54) {
  54                 val -= 54;
  55                 val <<= 2;
  56                 val += 54;
  57             }
  58
  59             val -= 40;
  60             val <<= 2;
  61             val += 40;
  62         }
  63
  64         s->lut[0][i] = val;
  65     }
  66
  67     for (int i = 0; i < 256; i++)
  68         s->lut[1][i] = i + ((768LL * i * i * i) / (256 * 256 * 256));
  69
  70     return ff_cfhd_init_vlcs(s);
  71 }
  72
  73 static void init_plane_defaults(CFHDContext *s)
  74 {
  75     s->subband_num        = 0;
  76     s->level              = 0;
  77     s->subband_num_actual = 0;
  78 }
  79
  80 static void init_peak_table_defaults(CFHDContext *s)
  81 {
  82     s->peak.level  = 0;
  83     s->peak.offset = 0;
  84     memset(&s->peak.base, 0, sizeof(s->peak.base));
  85 }
  86
  87 static void init_frame_defaults(CFHDContext *s)
  88 {
  89     s->coded_width       = 0;
  90     s->coded_height      = 0;
  91     s->cropped_height    = 0;
  92     s->bpc               = 10;
  93     s->channel_cnt       = 4;
  94     s->subband_cnt       = SUBBAND_COUNT;
  95     s->channel_num       = 0;
  96     s->lowpass_precision = 16;
  97     s->quantisation      = 1;
  98     s->codebook          = 0;
  99     s->difference_coding = 0;
 100     s->progressive       = 0;
 101     init_plane_defaults(s);
 102     init_peak_table_defaults(s);
 103 }
 104
 105 static inline int dequant_and_decompand(CFHDContext *s, int level, int quantisation, int codebook)
 106 {
 107     if (codebook == 0 || codebook == 1) {
 108         return s->lut[codebook][abs(level)] * FFSIGN(level) * quantisation;
 109     } else
 110         return level * quantisation;
 111 }
 112
 113 static inline void difference_coding(int16_t *band, int width, int height)
 114 {
 115
 116     int i,j;
 117     for (i = 0; i < height; i++) {
 118         for (j = 1; j < width; j++) {
 119           band[j] += band[j-1];
 120         }
 121         band += width;
 122     }
 123 }
 124
 125 static inline void peak_table(int16_t *band, Peak *peak, int length)
 126 {
 127     int i;
 128     for (i = 0; i < length; i++)
 129         if (abs(band[i]) > peak->level)
 130             band[i] = bytestream2_get_le16(&peak->base);
 131 }
 132
 133 static inline void process_alpha(int16_t *alpha, int width)
 134 {
 135     int i, channel;
 136     for (i = 0; i < width; i++) {
 137         channel   = alpha[i];
 138         channel  -= ALPHA_COMPAND_DC_OFFSET;
 139         channel <<= 3;
 140         channel  *= ALPHA_COMPAND_GAIN;
 141         channel >>= 16;
 142         channel   = av_clip_uintp2(channel, 12);
 143         alpha[i]  = channel;
 144     }
 145 }
 146
 147 static inline void process_bayer(AVFrame *frame)
 148 {
 149     const int linesize = frame->linesize[0];
 150     uint16_t *r = (uint16_t *)frame->data[0];
 151     uint16_t *g1 = (uint16_t *)(frame->data[0] + 2);
 152     uint16_t *g2 = (uint16_t *)(frame->data[0] + frame->linesize[0]);
 153     uint16_t *b = (uint16_t *)(frame->data[0] + frame->linesize[0] + 2);
 154     const int mid = 2048;
 155
 156     for (int y = 0; y < frame->height >> 1; y++) {
 157         for (int x = 0; x < frame->width; x += 2) {
 158             int R, G1, G2, B;
 159             int g, rg, bg, gd;
 160
 161             g  = r[x];
 162             rg = g1[x];
 163             bg = g2[x];
 164             gd = b[x];
 165             gd -= mid;
 166
 167             R  = (rg - mid) * 2 + g;
 168             G1 = g + gd;
 169             G2 = g - gd;
 170             B  = (bg - mid) * 2 + g;
 171
 172             R  = av_clip_uintp2(R  * 16, 16);
 173             G1 = av_clip_uintp2(G1 * 16, 16);
 174             G2 = av_clip_uintp2(G2 * 16, 16);
 175             B  = av_clip_uintp2(B  * 16, 16);
 176
 177             r[x]  = R;
 178             g1[x] = G1;
 179             g2[x] = G2;
 180             b[x]  = B;
 181         }
 182
 183         r  += linesize;
 184         g1 += linesize;
 185         g2 += linesize;
 186         b  += linesize;
 187     }
 188 }
 189
 190 static inline void filter(int16_t *output, ptrdiff_t out_stride,
 191                           int16_t *low, ptrdiff_t low_stride,
 192                           int16_t *high, ptrdiff_t high_stride,
 193                           int len, int clip)
 194 {
 195     int16_t tmp;
 196     int i;
 197
 198     tmp = (11*low[0*low_stride] - 4*low[1*low_stride] + low[2*low_stride] + 4) >> 3;
 199     output[(2*0+0)*out_stride] = (tmp + high[0*high_stride]) >> 1;
 200     if (clip)
 201         output[(2*0+0)*out_stride] = av_clip_uintp2_c(output[(2*0+0)*out_stride], clip);
 202
 203     tmp = ( 5*low[0*low_stride] + 4*low[1*low_stride] - low[2*low_stride] + 4) >> 3;
 204     output[(2*0+1)*out_stride] = (tmp - high[0*high_stride]) >> 1;
 205     if (clip)
 206         output[(2*0+1)*out_stride] = av_clip_uintp2_c(output[(2*0+1)*out_stride], clip);
 207
 208     for (i = 1; i < len - 1; i++) {
 209         tmp = (low[(i-1)*low_stride] - low[(i+1)*low_stride] + 4) >> 3;
 210         output[(2*i+0)*out_stride] = (tmp + low[i*low_stride] + high[i*high_stride]) >> 1;
 211         if (clip)
 212             output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
 213
 214         tmp = (low[(i+1)*low_stride] - low[(i-1)*low_stride] + 4) >> 3;
 215         output[(2*i+1)*out_stride] = (tmp + low[i*low_stride] - high[i*high_stride]) >> 1;
 216         if (clip)
 217             output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
 218     }
 219
 220     tmp = ( 5*low[i*low_stride] + 4*low[(i-1)*low_stride] - low[(i-2)*low_stride] + 4) >> 3;
 221     output[(2*i+0)*out_stride] = (tmp + high[i*high_stride]) >> 1;
 222     if (clip)
 223         output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
 224
 225     tmp = (11*low[i*low_stride] - 4*low[(i-1)*low_stride] + low[(i-2)*low_stride] + 4) >> 3;
 226     output[(2*i+1)*out_stride] = (tmp - high[i*high_stride]) >> 1;
 227     if (clip)
 228         output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
 229 }
 230
 231 static inline void interlaced_vertical_filter(int16_t *output, int16_t *low, int16_t *high,
 232                          int width, int linesize, int plane)
 233 {
 234     int i;
 235     int16_t even, odd;
 236     for (i = 0; i < width; i++) {
 237         even = (low[i] - high[i])/2;
 238         odd  = (low[i] + high[i])/2;
 239         output[i]            = av_clip_uintp2(even, 10);
 240         output[i + linesize] = av_clip_uintp2(odd, 10);
 241     }
 242 }
 243 static void horiz_filter(int16_t *output, int16_t *low, int16_t *high,
 244                          int width)
 245 {
 246     filter(output, 1, low, 1, high, 1, width, 0);
 247 }
 248
 249 static void horiz_filter_clip(int16_t *output, int16_t *low, int16_t *high,
 250                               int width, int clip)
 251 {
 252     filter(output, 1, low, 1, high, 1, width, clip);
 253 }
 254
 255 static void horiz_filter_clip_bayer(int16_t *output, int16_t *low, int16_t *high,
 256                                     int width, int clip)
 257 {
 258     filter(output, 2, low, 1, high, 1, width, clip);
 259 }
 260
 261 static void vert_filter(int16_t *output, ptrdiff_t out_stride,
 262                         int16_t *low, ptrdiff_t low_stride,
 263                         int16_t *high, ptrdiff_t high_stride, int len)
 264 {
 265     filter(output, out_stride, low, low_stride, high, high_stride, len, 0);
 266 }
 267
 268 static void free_buffers(CFHDContext *s)
 269 {
 270     int i, j;
 271
 272     for (i = 0; i < FF_ARRAY_ELEMS(s->plane); i++) {
 273         av_freep(&s->plane[i].idwt_buf);
 274         av_freep(&s->plane[i].idwt_tmp);
 275
 276         for (j = 0; j < 9; j++)
 277             s->plane[i].subband[j] = NULL;
 278
 279         for (j = 0; j < 8; j++)
 280             s->plane[i].l_h[j] = NULL;
 281     }
 282     s->a_height = 0;
 283     s->a_width  = 0;
 284 }
 285
 286 static int alloc_buffers(AVCodecContext *avctx)
 287 {
 288     CFHDContext *s = avctx->priv_data;
 289     int i, j, ret, planes;
 290     int chroma_x_shift, chroma_y_shift;
 291     unsigned k;
 292
 293     if (s->coded_format == AV_PIX_FMT_BAYER_RGGB16) {
 294         s->coded_width *= 2;
 295         s->coded_height *= 2;
 296     }
 297
 298     if ((ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height)) < 0)
 299         return ret;
 300     avctx->pix_fmt = s->coded_format;
 301
 302     if ((ret = av_pix_fmt_get_chroma_sub_sample(s->coded_format,
 303                                                 &chroma_x_shift,
 304                                                 &chroma_y_shift)) < 0)
 305         return ret;
 306     planes = av_pix_fmt_count_planes(s->coded_format);
 307     if (s->coded_format == AV_PIX_FMT_BAYER_RGGB16) {
 308         planes = 4;
 309         chroma_x_shift = 1;
 310         chroma_y_shift = 1;
 311     }
 312
 313     for (i = 0; i < planes; i++) {
 314         int w8, h8, w4, h4, w2, h2;
 315         int width  = i ? avctx->width  >> chroma_x_shift : avctx->width;
 316         int height = i ? avctx->height >> chroma_y_shift : avctx->height;
 317         ptrdiff_t stride = FFALIGN(width  / 8, 8) * 8;
 318         if (chroma_y_shift)
 319             height = FFALIGN(height / 8, 2) * 8;
 320         s->plane[i].width  = width;
 321         s->plane[i].height = height;
 322         s->plane[i].stride = stride;
 323
 324         w8 = FFALIGN(s->plane[i].width  / 8, 8);
 325         h8 = FFALIGN(height, 8) / 8;
 326         w4 = w8 * 2;
 327         h4 = h8 * 2;
 328         w2 = w4 * 2;
 329         h2 = h4 * 2;
 330
 331         s->plane[i].idwt_buf =
 332             av_mallocz_array(FFALIGN(height, 8) * stride, sizeof(*s->plane[i].idwt_buf));
 333         s->plane[i].idwt_tmp =
 334             av_malloc_array(FFALIGN(height, 8) * stride, sizeof(*s->plane[i].idwt_tmp));
 335         if (!s->plane[i].idwt_buf || !s->plane[i].idwt_tmp)
 336             return AVERROR(ENOMEM);
 337
 338         s->plane[i].subband[0] = s->plane[i].idwt_buf;
 339         s->plane[i].subband[1] = s->plane[i].idwt_buf + 2 * w8 * h8;
 340         s->plane[i].subband[2] = s->plane[i].idwt_buf + 1 * w8 * h8;
 341         s->plane[i].subband[3] = s->plane[i].idwt_buf + 3 * w8 * h8;
 342         s->plane[i].subband[4] = s->plane[i].idwt_buf + 2 * w4 * h4;
 343         s->plane[i].subband[5] = s->plane[i].idwt_buf + 1 * w4 * h4;
 344         s->plane[i].subband[6] = s->plane[i].idwt_buf + 3 * w4 * h4;
 345         s->plane[i].subband[7] = s->plane[i].idwt_buf + 2 * w2 * h2;
 346         s->plane[i].subband[8] = s->plane[i].idwt_buf + 1 * w2 * h2;
 347         s->plane[i].subband[9] = s->plane[i].idwt_buf + 3 * w2 * h2;
 348
 349         for (j = 0; j < DWT_LEVELS; j++) {
 350             for (k = 0; k < FF_ARRAY_ELEMS(s->plane[i].band[j]); k++) {
 351                 s->plane[i].band[j][k].a_width  = w8 << j;
 352                 s->plane[i].band[j][k].a_height = h8 << j;
 353             }
 354         }
 355
 356         /* ll2 and ll1 commented out because they are done in-place */
 357         s->plane[i].l_h[0] = s->plane[i].idwt_tmp;
 358         s->plane[i].l_h[1] = s->plane[i].idwt_tmp + 2 * w8 * h8;
 359         // s->plane[i].l_h[2] = ll2;
 360         s->plane[i].l_h[3] = s->plane[i].idwt_tmp;
 361         s->plane[i].l_h[4] = s->plane[i].idwt_tmp + 2 * w4 * h4;
 362         // s->plane[i].l_h[5] = ll1;
 363         s->plane[i].l_h[6] = s->plane[i].idwt_tmp;
 364         s->plane[i].l_h[7] = s->plane[i].idwt_tmp + 2 * w2 * h2;
 365     }
 366
 367     s->a_height = s->coded_height;
 368     s->a_width  = s->coded_width;
 369     s->a_format = s->coded_format;
 370
 371     return 0;
 372 }
 373
 374 static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
 375                        AVPacket *avpkt)
 376 {
 377     CFHDContext *s = avctx->priv_data;
 378     GetByteContext gb;
 379     ThreadFrame frame = { .f = data };
 380     AVFrame *pic = data;
 381     int ret = 0, i, j, planes, plane, got_buffer = 0;
 382     int16_t *coeff_data;
 383
 384     s->coded_format = AV_PIX_FMT_YUV422P10;
 385     init_frame_defaults(s);
 386     planes = av_pix_fmt_count_planes(s->coded_format);
 387
 388     bytestream2_init(&gb, avpkt->data, avpkt->size);
 389
 390     while (bytestream2_get_bytes_left(&gb) > 4) {
 391         /* Bit weird but implement the tag parsing as the spec says */
 392         uint16_t tagu   = bytestream2_get_be16(&gb);
 393         int16_t tag     = (int16_t)tagu;
 394         int8_t tag8     = (int8_t)(tagu >> 8);
 395         uint16_t abstag = abs(tag);
 396         int8_t abs_tag8 = abs(tag8);
 397         uint16_t data   = bytestream2_get_be16(&gb);
 398         if (abs_tag8 >= 0x60 && abs_tag8 <= 0x6f) {
 399             av_log(avctx, AV_LOG_DEBUG, "large len %x\n", ((tagu & 0xff) << 16) | data);
 400         } else if (tag == SampleFlags) {
 401             av_log(avctx, AV_LOG_DEBUG, "Progressive?%"PRIu16"\n", data);
 402             s->progressive = data & 0x0001;
 403         } else if (tag == ImageWidth) {
 404             av_log(avctx, AV_LOG_DEBUG, "Width %"PRIu16"\n", data);
 405             s->coded_width = data;
 406         } else if (tag == ImageHeight) {
 407             av_log(avctx, AV_LOG_DEBUG, "Height %"PRIu16"\n", data);
 408             s->coded_height = data;
 409         } else if (tag == BitsPerComponent) {
 410             av_log(avctx, AV_LOG_DEBUG, "Bits per component: %"PRIu16"\n", data);
 411             if (data < 1 || data > 31) {
 412                 av_log(avctx, AV_LOG_ERROR, "Bits per component %d is invalid\n", data);
 413                 ret = AVERROR(EINVAL);
 414                 break;
 415             }
 416             s->bpc = data;
 417         } else if (tag == ChannelCount) {
 418             av_log(avctx, AV_LOG_DEBUG, "Channel Count: %"PRIu16"\n", data);
 419             s->channel_cnt = data;
 420             if (data > 4) {
 421                 av_log(avctx, AV_LOG_ERROR, "Channel Count of %"PRIu16" is unsupported\n", data);
 422                 ret = AVERROR_PATCHWELCOME;
 423                 break;
 424             }
 425         } else if (tag == SubbandCount) {
 426             av_log(avctx, AV_LOG_DEBUG, "Subband Count: %"PRIu16"\n", data);
 427             if (data != SUBBAND_COUNT) {
 428                 av_log(avctx, AV_LOG_ERROR, "Subband Count of %"PRIu16" is unsupported\n", data);
 429                 ret = AVERROR_PATCHWELCOME;
 430                 break;
 431             }
 432         } else if (tag == ChannelNumber) {
 433             s->channel_num = data;
 434             av_log(avctx, AV_LOG_DEBUG, "Channel number %"PRIu16"\n", data);
 435             if (s->channel_num >= planes) {
 436                 av_log(avctx, AV_LOG_ERROR, "Invalid channel number\n");
 437                 ret = AVERROR(EINVAL);
 438                 break;
 439             }
 440             init_plane_defaults(s);
 441         } else if (tag == SubbandNumber) {
 442             if (s->subband_num != 0 && data == 1)  // hack
 443                 s->level++;
 444             av_log(avctx, AV_LOG_DEBUG, "Subband number %"PRIu16"\n", data);
 445             s->subband_num = data;
 446             if (s->level >= DWT_LEVELS) {
 447                 av_log(avctx, AV_LOG_ERROR, "Invalid level\n");
 448                 ret = AVERROR(EINVAL);
 449                 break;
 450             }
 451             if (s->subband_num > 3) {
 452                 av_log(avctx, AV_LOG_ERROR, "Invalid subband number\n");
 453                 ret = AVERROR(EINVAL);
 454                 break;
 455             }
 456         } else if (tag == SubbandBand) {
 457             av_log(avctx, AV_LOG_DEBUG, "Subband number actual %"PRIu16"\n", data);
 458             s->subband_num_actual = data;
 459             if (s->subband_num_actual >= 10) {
 460                 av_log(avctx, AV_LOG_ERROR, "Invalid subband number actual\n");
 461                 ret = AVERROR(EINVAL);
 462                 break;
 463             }
 464         } else if (tag == LowpassPrecision)
 465             av_log(avctx, AV_LOG_DEBUG, "Lowpass precision bits: %"PRIu16"\n", data);
 466         else if (tag == Quantization) {
 467             s->quantisation = data;
 468             av_log(avctx, AV_LOG_DEBUG, "Quantisation: %"PRIu16"\n", data);
 469         } else if (tag == PrescaleShift) {
 470             s->prescale_shift[0] = (data >> 0) & 0x7;
 471             s->prescale_shift[1] = (data >> 3) & 0x7;
 472             s->prescale_shift[2] = (data >> 6) & 0x7;
 473             av_log(avctx, AV_LOG_DEBUG, "Prescale shift (VC-5): %x\n", data);
 474         } else if (tag == LowpassWidth) {
 475             av_log(avctx, AV_LOG_DEBUG, "Lowpass width %"PRIu16"\n", data);
 476             if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_width) {
 477                 av_log(avctx, AV_LOG_ERROR, "Invalid lowpass width\n");
 478                 ret = AVERROR(EINVAL);
 479                 break;
 480             }
 481             s->plane[s->channel_num].band[0][0].width  = data;
 482             s->plane[s->channel_num].band[0][0].stride = data;
 483         } else if (tag == LowpassHeight) {
 484             av_log(avctx, AV_LOG_DEBUG, "Lowpass height %"PRIu16"\n", data);
 485             if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_height) {
 486                 av_log(avctx, AV_LOG_ERROR, "Invalid lowpass height\n");
 487                 ret = AVERROR(EINVAL);
 488                 break;
 489             }
 490             s->plane[s->channel_num].band[0][0].height = data;
 491         } else if (tag == SampleType)
 492             av_log(avctx, AV_LOG_DEBUG, "Sample type? %"PRIu16"\n", data);
 493         else if (tag == TransformType) {
 494             if (data != 0) {
 495                 avpriv_report_missing_feature(avctx, "Transform type of %"PRIu16, data);
 496                 ret = AVERROR_PATCHWELCOME;
 497                 break;
 498             }
 499             av_log(avctx, AV_LOG_DEBUG, "Transform-type? %"PRIu16"\n", data);
 500         } else if (abstag >= 0x4000 && abstag <= 0x40ff) {
 501             if (abstag == 0x4001)
 502                 s->peak.level = 0;
 503             av_log(avctx, AV_LOG_DEBUG, "Small chunk length %d %s\n", data * 4, tag < 0 ? "optional" : "required");
 504             bytestream2_skipu(&gb, data * 4);
 505         } else if (tag == 23) {
 506             av_log(avctx, AV_LOG_DEBUG, "Skip frame\n");
 507             avpriv_report_missing_feature(avctx, "Skip frame");
 508             ret = AVERROR_PATCHWELCOME;
 509             break;
 510         } else if (tag == SampleIndexTable) {
 511             av_log(avctx, AV_LOG_DEBUG, "tag=2 header - skipping %i tag/value pairs\n", data);
 512             if (data > bytestream2_get_bytes_left(&gb) / 4) {
 513                 av_log(avctx, AV_LOG_ERROR, "too many tag/value pairs (%d)\n", data);
 514                 ret = AVERROR_INVALIDDATA;
 515                 break;
 516             }
 517             for (i = 0; i < data; i++) {
 518                 uint16_t tag2 = bytestream2_get_be16(&gb);
 519                 uint16_t val2 = bytestream2_get_be16(&gb);
 520                 av_log(avctx, AV_LOG_DEBUG, "Tag/Value = %x %x\n", tag2, val2);
 521             }
 522         } else if (tag == HighpassWidth) {
 523             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);
 524             if (data < 3) {
 525                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass width\n");
 526                 ret = AVERROR(EINVAL);
 527                 break;
 528             }
 529             s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;
 530             s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
 531         } else if (tag == HighpassHeight) {
 532             av_log(avctx, AV_LOG_DEBUG, "Highpass height %i\n", data);
 533             if (data < 3) {
 534                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass height\n");
 535                 ret = AVERROR(EINVAL);
 536                 break;
 537             }
 538             s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
 539         } else if (tag == BandWidth) {
 540             av_log(avctx, AV_LOG_DEBUG, "Highpass width2 %i\n", data);
 541             if (data < 3) {
 542                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass width2\n");
 543                 ret = AVERROR(EINVAL);
 544                 break;
 545             }
 546             s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;
 547             s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
 548         } else if (tag == BandHeight) {
 549             av_log(avctx, AV_LOG_DEBUG, "Highpass height2 %i\n", data);
 550             if (data < 3) {
 551                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass height2\n");
 552                 ret = AVERROR(EINVAL);
 553                 break;
 554             }
 555             s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
 556         } else if (tag == InputFormat) {
 557             av_log(avctx, AV_LOG_DEBUG, "Input format %i\n", data);
 558         } else if (tag == BandCodingFlags) {
 559             s->codebook = data & 0xf;
 560             s->difference_coding = (data >> 4) & 1;
 561             av_log(avctx, AV_LOG_DEBUG, "Other codebook? %i\n", s->codebook);
 562         } else if (tag == Precision) {
 563             av_log(avctx, AV_LOG_DEBUG, "Precision %i\n", data);
 564             if (!(data == 10 || data == 12)) {
 565                 av_log(avctx, AV_LOG_ERROR, "Invalid bits per channel\n");
 566                 ret = AVERROR(EINVAL);
 567                 break;
 568             }
 569             avctx->bits_per_raw_sample = s->bpc = data;
 570         } else if (tag == EncodedFormat) {
 571             av_log(avctx, AV_LOG_DEBUG, "Sample format? %i\n", data);
 572             if (data == 1) {
 573                 s->coded_format = AV_PIX_FMT_YUV422P10;
 574             } else if (data == 2) {
 575                 s->coded_format = AV_PIX_FMT_BAYER_RGGB16;
 576             } else if (data == 3) {
 577                 s->coded_format = AV_PIX_FMT_GBRP12;
 578             } else if (data == 4) {
 579                 s->coded_format = AV_PIX_FMT_GBRAP12;
 580             } else {
 581                 avpriv_report_missing_feature(avctx, "Sample format of %"PRIu16, data);
 582                 ret = AVERROR_PATCHWELCOME;
 583                 break;
 584             }
 585             planes = data == 2 ? 4 : av_pix_fmt_count_planes(s->coded_format);
 586         } else if (tag == -85) {
 587             av_log(avctx, AV_LOG_DEBUG, "Cropped height %"PRIu16"\n", data);
 588             s->cropped_height = data;
 589         } else if (tag == -75) {
 590             s->peak.offset &= ~0xffff;
 591             s->peak.offset |= (data & 0xffff);
 592             s->peak.base    = gb;
 593             s->peak.level   = 0;
 594         } else if (tag == -76) {
 595             s->peak.offset &= 0xffff;
 596             s->peak.offset |= (data & 0xffffU)<<16;
 597             s->peak.base    = gb;
 598             s->peak.level   = 0;
 599         } else if (tag == -74 && s->peak.offset) {
 600             s->peak.level = data;
 601             bytestream2_seek(&s->peak.base, s->peak.offset - 4, SEEK_CUR);
 602         } else
 603             av_log(avctx, AV_LOG_DEBUG,  "Unknown tag %i data %x\n", tag, data);
 604
 605         /* Some kind of end of header tag */
 606         if (tag == BitstreamMarker && data == 0x1a4a && s->coded_width && s->coded_height &&
 607             s->coded_format != AV_PIX_FMT_NONE) {
 608             if (s->a_width != s->coded_width || s->a_height != s->coded_height ||
 609                 s->a_format != s->coded_format) {
 610                 free_buffers(s);
 611                 if ((ret = alloc_buffers(avctx)) < 0) {
 612                     free_buffers(s);
 613                     return ret;
 614                 }
 615             }
 616             ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height);
 617             if (ret < 0)
 618                 return ret;
 619             if (s->cropped_height) {
 620                 unsigned height = s->cropped_height << (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16);
 621                 if (avctx->height < height)
 622                     return AVERROR_INVALIDDATA;
 623                 avctx->height = height;
 624             }
 625             frame.f->width =
 626             frame.f->height = 0;
 627
 628             if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
 629                 return ret;
 630
 631             s->coded_width = 0;
 632             s->coded_height = 0;
 633             s->coded_format = AV_PIX_FMT_NONE;
 634             got_buffer = 1;
 635         }
 636         coeff_data = s->plane[s->channel_num].subband[s->subband_num_actual];
 637
 638         /* Lowpass coefficients */
 639         if (tag == BitstreamMarker && data == 0xf0f && s->a_width && s->a_height) {
 640             int lowpass_height = s->plane[s->channel_num].band[0][0].height;
 641             int lowpass_width  = s->plane[s->channel_num].band[0][0].width;
 642             int lowpass_a_height = s->plane[s->channel_num].band[0][0].a_height;
 643             int lowpass_a_width  = s->plane[s->channel_num].band[0][0].a_width;
 644
 645             if (!got_buffer) {
 646                 av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 647                 ret = AVERROR(EINVAL);
 648                 goto end;
 649             }
 650
 651             if (lowpass_height > lowpass_a_height || lowpass_width > lowpass_a_width ||
 652                 lowpass_a_width * lowpass_a_height * sizeof(int16_t) > bytestream2_get_bytes_left(&gb)) {
 653                 av_log(avctx, AV_LOG_ERROR, "Too many lowpass coefficients\n");
 654                 ret = AVERROR(EINVAL);
 655                 goto end;
 656             }
 657
 658             av_log(avctx, AV_LOG_DEBUG, "Start of lowpass coeffs component %d height:%d, width:%d\n", s->channel_num, lowpass_height, lowpass_width);
 659             for (i = 0; i < lowpass_height; i++) {
 660                 for (j = 0; j < lowpass_width; j++)
 661                     coeff_data[j] = bytestream2_get_be16u(&gb);
 662
 663                 coeff_data += lowpass_width;
 664             }
 665
 666             /* Align to mod-4 position to continue reading tags */
 667             bytestream2_seek(&gb, bytestream2_tell(&gb) & 3, SEEK_CUR);
 668
 669             /* Copy last line of coefficients if odd height */
 670             if (lowpass_height & 1) {
 671                 memcpy(&coeff_data[lowpass_height * lowpass_width],
 672                        &coeff_data[(lowpass_height - 1) * lowpass_width],
 673                        lowpass_width * sizeof(*coeff_data));
 674             }
 675
 676             av_log(avctx, AV_LOG_DEBUG, "Lowpass coefficients %d\n", lowpass_width * lowpass_height);
 677         }
 678
 679         if (tag == BandHeader && s->subband_num_actual != 255 && s->a_width && s->a_height) {
 680             int highpass_height = s->plane[s->channel_num].band[s->level][s->subband_num].height;
 681             int highpass_width  = s->plane[s->channel_num].band[s->level][s->subband_num].width;
 682             int highpass_a_width = s->plane[s->channel_num].band[s->level][s->subband_num].a_width;
 683             int highpass_a_height = s->plane[s->channel_num].band[s->level][s->subband_num].a_height;
 684             int highpass_stride = s->plane[s->channel_num].band[s->level][s->subband_num].stride;
 685             int expected;
 686             int a_expected = highpass_a_height * highpass_a_width;
 687             int level, run, coeff;
 688             int count = 0, bytes;
 689
 690             if (!got_buffer) {
 691                 av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 692                 ret = AVERROR(EINVAL);
 693                 goto end;
 694             }
 695
 696             if (highpass_height > highpass_a_height || highpass_width > highpass_a_width || a_expected < highpass_height * (uint64_t)highpass_stride) {
 697                 av_log(avctx, AV_LOG_ERROR, "Too many highpass coefficients\n");
 698                 ret = AVERROR(EINVAL);
 699                 goto end;
 700             }
 701             expected = highpass_height * highpass_stride;
 702
 703             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);
 704
 705             init_get_bits(&s->gb, gb.buffer, bytestream2_get_bytes_left(&gb) * 8);
 706             {
 707                 OPEN_READER(re, &s->gb);
 708                 if (!s->codebook) {
 709                     while (1) {
 710                         UPDATE_CACHE(re, &s->gb);
 711                         GET_RL_VLC(level, run, re, &s->gb, s->table_9_rl_vlc,
 712                                    VLC_BITS, 3, 1);
 713
 714                         /* escape */
 715                         if (level == 64)
 716                             break;
 717
 718                         count += run;
 719
 720                         if (count > expected)
 721                             break;
 722
 723                         coeff = dequant_and_decompand(s, level, s->quantisation, 0);
 724                         for (i = 0; i < run; i++)
 725                             *coeff_data++ = coeff;
 726                     }
 727                 } else {
 728                     while (1) {
 729                         UPDATE_CACHE(re, &s->gb);
 730                         GET_RL_VLC(level, run, re, &s->gb, s->table_18_rl_vlc,
 731                                    VLC_BITS, 3, 1);
 732
 733                         /* escape */
 734                         if (level == 255 && run == 2)
 735                             break;
 736
 737                         count += run;
 738
 739                         if (count > expected)
 740                             break;
 741
 742                         coeff = dequant_and_decompand(s, level, s->quantisation, s->codebook);
 743                         for (i = 0; i < run; i++)
 744                             *coeff_data++ = coeff;
 745                     }
 746                 }
 747                 CLOSE_READER(re, &s->gb);
 748             }
 749
 750             if (count > expected) {
 751                 av_log(avctx, AV_LOG_ERROR, "Escape codeword not found, probably corrupt data\n");
 752                 ret = AVERROR(EINVAL);
 753                 goto end;
 754             }
 755             if (s->peak.level)
 756                 peak_table(coeff_data - count, &s->peak, count);
 757             if (s->difference_coding)
 758                 difference_coding(s->plane[s->channel_num].subband[s->subband_num_actual], highpass_width, highpass_height);
 759
 760             bytes = FFALIGN(AV_CEIL_RSHIFT(get_bits_count(&s->gb), 3), 4);
 761             if (bytes > bytestream2_get_bytes_left(&gb)) {
 762                 av_log(avctx, AV_LOG_ERROR, "Bitstream overread error\n");
 763                 ret = AVERROR(EINVAL);
 764                 goto end;
 765             } else
 766                 bytestream2_seek(&gb, bytes, SEEK_CUR);
 767
 768             av_log(avctx, AV_LOG_DEBUG, "End subband coeffs %i extra %i\n", count, count - expected);
 769             s->codebook = 0;
 770
 771             /* Copy last line of coefficients if odd height */
 772             if (highpass_height & 1) {
 773                 memcpy(&coeff_data[highpass_height * highpass_stride],
 774                        &coeff_data[(highpass_height - 1) * highpass_stride],
 775                        highpass_stride * sizeof(*coeff_data));
 776             }
 777         }
 778     }
 779
 780     if (!s->a_width || !s->a_height || s->a_format == AV_PIX_FMT_NONE ||
 781         s->coded_width || s->coded_height || s->coded_format != AV_PIX_FMT_NONE) {
 782         av_log(avctx, AV_LOG_ERROR, "Invalid dimensions\n");
 783         ret = AVERROR(EINVAL);
 784         goto end;
 785     }
 786
 787     if (!got_buffer) {
 788         av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 789         ret = AVERROR(EINVAL);
 790         goto end;
 791     }
 792
 793     planes = av_pix_fmt_count_planes(avctx->pix_fmt);
 794     if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16) {
 795         if (!s->progressive)
 796             return AVERROR_INVALIDDATA;
 797         planes = 4;
 798     }
 799
 800     for (plane = 0; plane < planes && !ret; plane++) {
 801         /* level 1 */
 802         int lowpass_height  = s->plane[plane].band[0][0].height;
 803         int lowpass_width   = s->plane[plane].band[0][0].width;
 804         int highpass_stride = s->plane[plane].band[0][1].stride;
 805         int act_plane = plane == 1 ? 2 : plane == 2 ? 1 : plane;
 806         ptrdiff_t dst_linesize;
 807         int16_t *low, *high, *output, *dst;
 808
 809         if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16) {
 810             act_plane = 0;
 811             dst_linesize = pic->linesize[act_plane];
 812         } else {
 813             dst_linesize = pic->linesize[act_plane] / 2;
 814         }
 815
 816         if (lowpass_height > s->plane[plane].band[0][0].a_height || lowpass_width > s->plane[plane].band[0][0].a_width ||
 817             !highpass_stride || s->plane[plane].band[0][1].width > s->plane[plane].band[0][1].a_width) {
 818             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 819             ret = AVERROR(EINVAL);
 820             goto end;
 821         }
 822
 823         av_log(avctx, AV_LOG_DEBUG, "Decoding level 1 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 824
 825         low    = s->plane[plane].subband[0];
 826         high   = s->plane[plane].subband[2];
 827         output = s->plane[plane].l_h[0];
 828         for (i = 0; i < lowpass_width; i++) {
 829             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 830             low++;
 831             high++;
 832             output++;
 833         }
 834
 835         low    = s->plane[plane].subband[1];
 836         high   = s->plane[plane].subband[3];
 837         output = s->plane[plane].l_h[1];
 838
 839         for (i = 0; i < lowpass_width; i++) {
 840             // note the stride of "low" is highpass_stride
 841             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 842             low++;
 843             high++;
 844             output++;
 845         }
 846
 847         low    = s->plane[plane].l_h[0];
 848         high   = s->plane[plane].l_h[1];
 849         output = s->plane[plane].subband[0];
 850         for (i = 0; i < lowpass_height * 2; i++) {
 851             horiz_filter(output, low, high, lowpass_width);
 852             low    += lowpass_width;
 853             high   += lowpass_width;
 854             output += lowpass_width * 2;
 855         }
 856         if (s->bpc == 12) {
 857             output = s->plane[plane].subband[0];
 858             for (i = 0; i < lowpass_height * 2; i++) {
 859                 for (j = 0; j < lowpass_width * 2; j++)
 860                     output[j] *= 4;
 861
 862                 output += lowpass_width * 2;
 863             }
 864         }
 865
 866         /* level 2 */
 867         lowpass_height  = s->plane[plane].band[1][1].height;
 868         lowpass_width   = s->plane[plane].band[1][1].width;
 869         highpass_stride = s->plane[plane].band[1][1].stride;
 870
 871         if (lowpass_height > s->plane[plane].band[1][1].a_height || lowpass_width > s->plane[plane].band[1][1].a_width ||
 872             !highpass_stride || s->plane[plane].band[1][1].width > s->plane[plane].band[1][1].a_width) {
 873             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 874             ret = AVERROR(EINVAL);
 875             goto end;
 876         }
 877
 878         av_log(avctx, AV_LOG_DEBUG, "Level 2 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 879
 880         low    = s->plane[plane].subband[0];
 881         high   = s->plane[plane].subband[5];
 882         output = s->plane[plane].l_h[3];
 883         for (i = 0; i < lowpass_width; i++) {
 884             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 885             low++;
 886             high++;
 887             output++;
 888         }
 889
 890         low    = s->plane[plane].subband[4];
 891         high   = s->plane[plane].subband[6];
 892         output = s->plane[plane].l_h[4];
 893         for (i = 0; i < lowpass_width; i++) {
 894             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 895             low++;
 896             high++;
 897             output++;
 898         }
 899
 900         low    = s->plane[plane].l_h[3];
 901         high   = s->plane[plane].l_h[4];
 902         output = s->plane[plane].subband[0];
 903         for (i = 0; i < lowpass_height * 2; i++) {
 904             horiz_filter(output, low, high, lowpass_width);
 905             low    += lowpass_width;
 906             high   += lowpass_width;
 907             output += lowpass_width * 2;
 908         }
 909
 910         output = s->plane[plane].subband[0];
 911         for (i = 0; i < lowpass_height * 2; i++) {
 912             for (j = 0; j < lowpass_width * 2; j++)
 913                 output[j] *= 4;
 914
 915             output += lowpass_width * 2;
 916         }
 917
 918         /* level 3 */
 919         lowpass_height  = s->plane[plane].band[2][1].height;
 920         lowpass_width   = s->plane[plane].band[2][1].width;
 921         highpass_stride = s->plane[plane].band[2][1].stride;
 922
 923         if (lowpass_height > s->plane[plane].band[2][1].a_height || lowpass_width > s->plane[plane].band[2][1].a_width ||
 924             !highpass_stride || s->plane[plane].band[2][1].width > s->plane[plane].band[2][1].a_width) {
 925             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 926             ret = AVERROR(EINVAL);
 927             goto end;
 928         }
 929
 930         av_log(avctx, AV_LOG_DEBUG, "Level 3 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 931         if (s->progressive) {
 932             low    = s->plane[plane].subband[0];
 933             high   = s->plane[plane].subband[8];
 934             output = s->plane[plane].l_h[6];
 935             for (i = 0; i < lowpass_width; i++) {
 936                 vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 937                 low++;
 938                 high++;
 939                 output++;
 940             }
 941
 942             low    = s->plane[plane].subband[7];
 943             high   = s->plane[plane].subband[9];
 944             output = s->plane[plane].l_h[7];
 945             for (i = 0; i < lowpass_width; i++) {
 946                 vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 947                 low++;
 948                 high++;
 949                 output++;
 950             }
 951
 952             dst = (int16_t *)pic->data[act_plane];
 953             if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16) {
 954                 if (plane & 1)
 955                     dst++;
 956                 if (plane > 1)
 957                     dst += pic->linesize[act_plane] >> 1;
 958             }
 959             low  = s->plane[plane].l_h[6];
 960             high = s->plane[plane].l_h[7];
 961
 962             if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16 &&
 963                 (lowpass_height * 2 > avctx->coded_height / 2 ||
 964                  lowpass_width  * 2 > avctx->coded_width  / 2    )
 965                 ) {
 966                 ret = AVERROR_INVALIDDATA;
 967                 goto end;
 968             }
 969
 970             for (i = 0; i < lowpass_height * 2; i++) {
 971                 if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16)
 972                     horiz_filter_clip_bayer(dst, low, high, lowpass_width, s->bpc);
 973                 else
 974                     horiz_filter_clip(dst, low, high, lowpass_width, s->bpc);
 975                 if (avctx->pix_fmt == AV_PIX_FMT_GBRAP12 && act_plane == 3)
 976                     process_alpha(dst, lowpass_width * 2);
 977                 low  += lowpass_width;
 978                 high += lowpass_width;
 979                 dst  += dst_linesize;
 980             }
 981         } else {
 982             av_log(avctx, AV_LOG_DEBUG, "interlaced frame ? %d", pic->interlaced_frame);
 983             pic->interlaced_frame = 1;
 984             low    = s->plane[plane].subband[0];
 985             high   = s->plane[plane].subband[7];
 986             output = s->plane[plane].l_h[6];
 987             for (i = 0; i < lowpass_height; i++) {
 988                 horiz_filter(output, low, high, lowpass_width);
 989                 low    += lowpass_width;
 990                 high   += lowpass_width;
 991                 output += lowpass_width * 2;
 992             }
 993
 994             low    = s->plane[plane].subband[8];
 995             high   = s->plane[plane].subband[9];
 996             output = s->plane[plane].l_h[7];
 997             for (i = 0; i < lowpass_height; i++) {
 998                 horiz_filter(output, low, high, lowpass_width);
 999                 low    += lowpass_width;
1000                 high   += lowpass_width;
1001                 output += lowpass_width * 2;
1002             }
1003
1004             dst  = (int16_t *)pic->data[act_plane];
1005             low  = s->plane[plane].l_h[6];
1006             high = s->plane[plane].l_h[7];
1007             for (i = 0; i < lowpass_height; i++) {
1008                 interlaced_vertical_filter(dst, low, high, lowpass_width * 2,  pic->linesize[act_plane]/2, act_plane);
1009                 low  += lowpass_width * 2;
1010                 high += lowpass_width * 2;
1011                 dst  += pic->linesize[act_plane];
1012             }
1013         }
1014     }
1015
1016
1017     if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16)
1018         process_bayer(pic);
1019 end:
1020     if (ret < 0)
1021         return ret;
1022
1023     *got_frame = 1;
1024     return avpkt->size;
1025 }
1026
1027 static av_cold int cfhd_close(AVCodecContext *avctx)
1028 {
1029     CFHDContext *s = avctx->priv_data;
1030
1031     free_buffers(s);
1032
1033     ff_free_vlc(&s->vlc_9);
1034     ff_free_vlc(&s->vlc_18);
1035
1036     return 0;
1037 }
1038
1039 AVCodec ff_cfhd_decoder = {
1040     .name             = "cfhd",
1041     .long_name        = NULL_IF_CONFIG_SMALL("Cineform HD"),
1042     .type             = AVMEDIA_TYPE_VIDEO,
1043     .id               = AV_CODEC_ID_CFHD,
1044     .priv_data_size   = sizeof(CFHDContext),
1045     .init             = cfhd_init,
1046     .close            = cfhd_close,
1047     .decode           = cfhd_decode,
1048     .capabilities     = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
1049     .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
1050 };