git.sesse.net Git - ffmpeg/blob - libavcodec/cfhd.c

   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->wavelet_depth     = 3;
  99     s->pshift            = 1;
 100     s->codebook          = 0;
 101     s->difference_coding = 0;
 102     s->progressive       = 0;
 103     init_plane_defaults(s);
 104     init_peak_table_defaults(s);
 105 }
 106
 107 static inline int dequant_and_decompand(CFHDContext *s, int level, int quantisation, int codebook)
 108 {
 109     if (codebook == 0 || codebook == 1) {
 110         return s->lut[codebook][abs(level)] * FFSIGN(level) * quantisation;
 111     } else
 112         return level * quantisation;
 113 }
 114
 115 static inline void difference_coding(int16_t *band, int width, int height)
 116 {
 117
 118     int i,j;
 119     for (i = 0; i < height; i++) {
 120         for (j = 1; j < width; j++) {
 121           band[j] += band[j-1];
 122         }
 123         band += width;
 124     }
 125 }
 126
 127 static inline void peak_table(int16_t *band, Peak *peak, int length)
 128 {
 129     int i;
 130     for (i = 0; i < length; i++)
 131         if (abs(band[i]) > peak->level)
 132             band[i] = bytestream2_get_le16(&peak->base);
 133 }
 134
 135 static inline void process_alpha(int16_t *alpha, int width)
 136 {
 137     int i, channel;
 138     for (i = 0; i < width; i++) {
 139         channel   = alpha[i];
 140         channel  -= ALPHA_COMPAND_DC_OFFSET;
 141         channel <<= 3;
 142         channel  *= ALPHA_COMPAND_GAIN;
 143         channel >>= 16;
 144         channel   = av_clip_uintp2(channel, 12);
 145         alpha[i]  = channel;
 146     }
 147 }
 148
 149 static inline void process_bayer(AVFrame *frame)
 150 {
 151     const int linesize = frame->linesize[0];
 152     uint16_t *r = (uint16_t *)frame->data[0];
 153     uint16_t *g1 = (uint16_t *)(frame->data[0] + 2);
 154     uint16_t *g2 = (uint16_t *)(frame->data[0] + frame->linesize[0]);
 155     uint16_t *b = (uint16_t *)(frame->data[0] + frame->linesize[0] + 2);
 156     const int mid = 2048;
 157
 158     for (int y = 0; y < frame->height >> 1; y++) {
 159         for (int x = 0; x < frame->width; x += 2) {
 160             int R, G1, G2, B;
 161             int g, rg, bg, gd;
 162
 163             g  = r[x];
 164             rg = g1[x];
 165             bg = g2[x];
 166             gd = b[x];
 167             gd -= mid;
 168
 169             R  = (rg - mid) * 2 + g;
 170             G1 = g + gd;
 171             G2 = g - gd;
 172             B  = (bg - mid) * 2 + g;
 173
 174             R  = av_clip_uintp2(R  * 16, 16);
 175             G1 = av_clip_uintp2(G1 * 16, 16);
 176             G2 = av_clip_uintp2(G2 * 16, 16);
 177             B  = av_clip_uintp2(B  * 16, 16);
 178
 179             r[x]  = R;
 180             g1[x] = G1;
 181             g2[x] = G2;
 182             b[x]  = B;
 183         }
 184
 185         r  += linesize;
 186         g1 += linesize;
 187         g2 += linesize;
 188         b  += linesize;
 189     }
 190 }
 191
 192 static inline void filter(int16_t *output, ptrdiff_t out_stride,
 193                           int16_t *low, ptrdiff_t low_stride,
 194                           int16_t *high, ptrdiff_t high_stride,
 195                           int len, int clip)
 196 {
 197     int16_t tmp;
 198     int i;
 199
 200     tmp = (11*low[0*low_stride] - 4*low[1*low_stride] + low[2*low_stride] + 4) >> 3;
 201     output[(2*0+0)*out_stride] = (tmp + high[0*high_stride]) >> 1;
 202     if (clip)
 203         output[(2*0+0)*out_stride] = av_clip_uintp2_c(output[(2*0+0)*out_stride], clip);
 204
 205     tmp = ( 5*low[0*low_stride] + 4*low[1*low_stride] - low[2*low_stride] + 4) >> 3;
 206     output[(2*0+1)*out_stride] = (tmp - high[0*high_stride]) >> 1;
 207     if (clip)
 208         output[(2*0+1)*out_stride] = av_clip_uintp2_c(output[(2*0+1)*out_stride], clip);
 209
 210     for (i = 1; i < len - 1; i++) {
 211         tmp = (low[(i-1)*low_stride] - low[(i+1)*low_stride] + 4) >> 3;
 212         output[(2*i+0)*out_stride] = (tmp + low[i*low_stride] + high[i*high_stride]) >> 1;
 213         if (clip)
 214             output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
 215
 216         tmp = (low[(i+1)*low_stride] - low[(i-1)*low_stride] + 4) >> 3;
 217         output[(2*i+1)*out_stride] = (tmp + low[i*low_stride] - high[i*high_stride]) >> 1;
 218         if (clip)
 219             output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
 220     }
 221
 222     tmp = ( 5*low[i*low_stride] + 4*low[(i-1)*low_stride] - low[(i-2)*low_stride] + 4) >> 3;
 223     output[(2*i+0)*out_stride] = (tmp + high[i*high_stride]) >> 1;
 224     if (clip)
 225         output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
 226
 227     tmp = (11*low[i*low_stride] - 4*low[(i-1)*low_stride] + low[(i-2)*low_stride] + 4) >> 3;
 228     output[(2*i+1)*out_stride] = (tmp - high[i*high_stride]) >> 1;
 229     if (clip)
 230         output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
 231 }
 232
 233 static inline void interlaced_vertical_filter(int16_t *output, int16_t *low, int16_t *high,
 234                          int width, int linesize, int plane)
 235 {
 236     int i;
 237     int16_t even, odd;
 238     for (i = 0; i < width; i++) {
 239         even = (low[i] - high[i])/2;
 240         odd  = (low[i] + high[i])/2;
 241         output[i]            = av_clip_uintp2(even, 10);
 242         output[i + linesize] = av_clip_uintp2(odd, 10);
 243     }
 244 }
 245 static void horiz_filter(int16_t *output, int16_t *low, int16_t *high,
 246                          int width)
 247 {
 248     filter(output, 1, low, 1, high, 1, width, 0);
 249 }
 250
 251 static void horiz_filter_clip(int16_t *output, int16_t *low, int16_t *high,
 252                               int width, int clip)
 253 {
 254     filter(output, 1, low, 1, high, 1, width, clip);
 255 }
 256
 257 static void horiz_filter_clip_bayer(int16_t *output, int16_t *low, int16_t *high,
 258                                     int width, int clip)
 259 {
 260     filter(output, 2, low, 1, high, 1, width, clip);
 261 }
 262
 263 static void vert_filter(int16_t *output, ptrdiff_t out_stride,
 264                         int16_t *low, ptrdiff_t low_stride,
 265                         int16_t *high, ptrdiff_t high_stride, int len)
 266 {
 267     filter(output, out_stride, low, low_stride, high, high_stride, len, 0);
 268 }
 269
 270 static void free_buffers(CFHDContext *s)
 271 {
 272     int i, j;
 273
 274     for (i = 0; i < FF_ARRAY_ELEMS(s->plane); i++) {
 275         av_freep(&s->plane[i].idwt_buf);
 276         av_freep(&s->plane[i].idwt_tmp);
 277
 278         for (j = 0; j < 9; j++)
 279             s->plane[i].subband[j] = NULL;
 280
 281         for (j = 0; j < 8; j++)
 282             s->plane[i].l_h[j] = NULL;
 283     }
 284     s->a_height = 0;
 285     s->a_width  = 0;
 286 }
 287
 288 static int alloc_buffers(AVCodecContext *avctx)
 289 {
 290     CFHDContext *s = avctx->priv_data;
 291     int i, j, ret, planes;
 292     int chroma_x_shift, chroma_y_shift;
 293     unsigned k;
 294
 295     if (s->coded_format == AV_PIX_FMT_BAYER_RGGB16) {
 296         s->coded_width *= 2;
 297         s->coded_height *= 2;
 298     }
 299
 300     if ((ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height)) < 0)
 301         return ret;
 302     avctx->pix_fmt = s->coded_format;
 303
 304     if ((ret = av_pix_fmt_get_chroma_sub_sample(s->coded_format,
 305                                                 &chroma_x_shift,
 306                                                 &chroma_y_shift)) < 0)
 307         return ret;
 308     planes = av_pix_fmt_count_planes(s->coded_format);
 309     if (s->coded_format == AV_PIX_FMT_BAYER_RGGB16) {
 310         planes = 4;
 311         chroma_x_shift = 1;
 312         chroma_y_shift = 1;
 313     }
 314
 315     for (i = 0; i < planes; i++) {
 316         int w8, h8, w4, h4, w2, h2;
 317         int width  = i ? avctx->width  >> chroma_x_shift : avctx->width;
 318         int height = i ? avctx->height >> chroma_y_shift : avctx->height;
 319         ptrdiff_t stride = FFALIGN(width  / 8, 8) * 8;
 320         if (chroma_y_shift)
 321             height = FFALIGN(height / 8, 2) * 8;
 322         s->plane[i].width  = width;
 323         s->plane[i].height = height;
 324         s->plane[i].stride = stride;
 325
 326         w8 = FFALIGN(s->plane[i].width  / 8, 8);
 327         h8 = FFALIGN(height, 8) / 8;
 328         w4 = w8 * 2;
 329         h4 = h8 * 2;
 330         w2 = w4 * 2;
 331         h2 = h4 * 2;
 332
 333         s->plane[i].idwt_buf =
 334             av_mallocz_array(FFALIGN(height, 8) * stride, sizeof(*s->plane[i].idwt_buf));
 335         s->plane[i].idwt_tmp =
 336             av_malloc_array(FFALIGN(height, 8) * stride, sizeof(*s->plane[i].idwt_tmp));
 337         if (!s->plane[i].idwt_buf || !s->plane[i].idwt_tmp)
 338             return AVERROR(ENOMEM);
 339
 340         s->plane[i].subband[0] = s->plane[i].idwt_buf;
 341         s->plane[i].subband[1] = s->plane[i].idwt_buf + 2 * w8 * h8;
 342         s->plane[i].subband[2] = s->plane[i].idwt_buf + 1 * w8 * h8;
 343         s->plane[i].subband[3] = s->plane[i].idwt_buf + 3 * w8 * h8;
 344         s->plane[i].subband[4] = s->plane[i].idwt_buf + 2 * w4 * h4;
 345         s->plane[i].subband[5] = s->plane[i].idwt_buf + 1 * w4 * h4;
 346         s->plane[i].subband[6] = s->plane[i].idwt_buf + 3 * w4 * h4;
 347         s->plane[i].subband[7] = s->plane[i].idwt_buf + 2 * w2 * h2;
 348         s->plane[i].subband[8] = s->plane[i].idwt_buf + 1 * w2 * h2;
 349         s->plane[i].subband[9] = s->plane[i].idwt_buf + 3 * w2 * h2;
 350
 351         for (j = 0; j < DWT_LEVELS; j++) {
 352             for (k = 0; k < FF_ARRAY_ELEMS(s->plane[i].band[j]); k++) {
 353                 s->plane[i].band[j][k].a_width  = w8 << j;
 354                 s->plane[i].band[j][k].a_height = h8 << j;
 355             }
 356         }
 357
 358         /* ll2 and ll1 commented out because they are done in-place */
 359         s->plane[i].l_h[0] = s->plane[i].idwt_tmp;
 360         s->plane[i].l_h[1] = s->plane[i].idwt_tmp + 2 * w8 * h8;
 361         // s->plane[i].l_h[2] = ll2;
 362         s->plane[i].l_h[3] = s->plane[i].idwt_tmp;
 363         s->plane[i].l_h[4] = s->plane[i].idwt_tmp + 2 * w4 * h4;
 364         // s->plane[i].l_h[5] = ll1;
 365         s->plane[i].l_h[6] = s->plane[i].idwt_tmp;
 366         s->plane[i].l_h[7] = s->plane[i].idwt_tmp + 2 * w2 * h2;
 367     }
 368
 369     s->a_height = s->coded_height;
 370     s->a_width  = s->coded_width;
 371     s->a_format = s->coded_format;
 372
 373     return 0;
 374 }
 375
 376 static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
 377                        AVPacket *avpkt)
 378 {
 379     CFHDContext *s = avctx->priv_data;
 380     GetByteContext gb;
 381     ThreadFrame frame = { .f = data };
 382     AVFrame *pic = data;
 383     int ret = 0, i, j, planes, plane, got_buffer = 0;
 384     int16_t *coeff_data;
 385
 386     s->coded_format = AV_PIX_FMT_YUV422P10;
 387     init_frame_defaults(s);
 388     planes = av_pix_fmt_count_planes(s->coded_format);
 389
 390     bytestream2_init(&gb, avpkt->data, avpkt->size);
 391
 392     while (bytestream2_get_bytes_left(&gb) > 4) {
 393         /* Bit weird but implement the tag parsing as the spec says */
 394         uint16_t tagu   = bytestream2_get_be16(&gb);
 395         int16_t tag     = (int16_t)tagu;
 396         int8_t tag8     = (int8_t)(tagu >> 8);
 397         uint16_t abstag = abs(tag);
 398         int8_t abs_tag8 = abs(tag8);
 399         uint16_t data   = bytestream2_get_be16(&gb);
 400         if (abs_tag8 >= 0x60 && abs_tag8 <= 0x6f) {
 401             av_log(avctx, AV_LOG_DEBUG, "large len %x\n", ((tagu & 0xff) << 16) | data);
 402         } else if (tag == SampleFlags) {
 403             av_log(avctx, AV_LOG_DEBUG, "Progressive?%"PRIu16"\n", data);
 404             s->progressive = data & 0x0001;
 405         } else if (tag == ImageWidth) {
 406             av_log(avctx, AV_LOG_DEBUG, "Width %"PRIu16"\n", data);
 407             s->coded_width = data;
 408         } else if (tag == ImageHeight) {
 409             av_log(avctx, AV_LOG_DEBUG, "Height %"PRIu16"\n", data);
 410             s->coded_height = data;
 411         } else if (tag == BitsPerComponent) {
 412             av_log(avctx, AV_LOG_DEBUG, "Bits per component: %"PRIu16"\n", data);
 413             if (data < 1 || data > 31) {
 414                 av_log(avctx, AV_LOG_ERROR, "Bits per component %d is invalid\n", data);
 415                 ret = AVERROR(EINVAL);
 416                 break;
 417             }
 418             s->bpc = data;
 419         } else if (tag == ChannelCount) {
 420             av_log(avctx, AV_LOG_DEBUG, "Channel Count: %"PRIu16"\n", data);
 421             s->channel_cnt = data;
 422             if (data > 4) {
 423                 av_log(avctx, AV_LOG_ERROR, "Channel Count of %"PRIu16" is unsupported\n", data);
 424                 ret = AVERROR_PATCHWELCOME;
 425                 break;
 426             }
 427         } else if (tag == SubbandCount) {
 428             av_log(avctx, AV_LOG_DEBUG, "Subband Count: %"PRIu16"\n", data);
 429             if (data != SUBBAND_COUNT) {
 430                 av_log(avctx, AV_LOG_ERROR, "Subband Count of %"PRIu16" is unsupported\n", data);
 431                 ret = AVERROR_PATCHWELCOME;
 432                 break;
 433             }
 434         } else if (tag == ChannelNumber) {
 435             s->channel_num = data;
 436             av_log(avctx, AV_LOG_DEBUG, "Channel number %"PRIu16"\n", data);
 437             if (s->channel_num >= planes) {
 438                 av_log(avctx, AV_LOG_ERROR, "Invalid channel number\n");
 439                 ret = AVERROR(EINVAL);
 440                 break;
 441             }
 442             init_plane_defaults(s);
 443         } else if (tag == SubbandNumber) {
 444             if (s->subband_num != 0 && data == 1)  // hack
 445                 s->level++;
 446             av_log(avctx, AV_LOG_DEBUG, "Subband number %"PRIu16"\n", data);
 447             s->subband_num = data;
 448             if (s->level >= DWT_LEVELS) {
 449                 av_log(avctx, AV_LOG_ERROR, "Invalid level\n");
 450                 ret = AVERROR(EINVAL);
 451                 break;
 452             }
 453             if (s->subband_num > 3) {
 454                 av_log(avctx, AV_LOG_ERROR, "Invalid subband number\n");
 455                 ret = AVERROR(EINVAL);
 456                 break;
 457             }
 458         } else if (tag == SubbandBand) {
 459             av_log(avctx, AV_LOG_DEBUG, "Subband number actual %"PRIu16"\n", data);
 460             s->subband_num_actual = data;
 461             if (s->subband_num_actual >= 10) {
 462                 av_log(avctx, AV_LOG_ERROR, "Invalid subband number actual\n");
 463                 ret = AVERROR(EINVAL);
 464                 break;
 465             }
 466         } else if (tag == LowpassPrecision)
 467             av_log(avctx, AV_LOG_DEBUG, "Lowpass precision bits: %"PRIu16"\n", data);
 468         else if (tag == Quantization) {
 469             s->quantisation = data;
 470             av_log(avctx, AV_LOG_DEBUG, "Quantisation: %"PRIu16"\n", data);
 471         } else if (tag == PrescaleShift) {
 472             s->prescale_shift[0] = (data >> 0) & 0x7;
 473             s->prescale_shift[1] = (data >> 3) & 0x7;
 474             s->prescale_shift[2] = (data >> 6) & 0x7;
 475             av_log(avctx, AV_LOG_DEBUG, "Prescale shift (VC-5): %x\n", data);
 476         } else if (tag == LowpassWidth) {
 477             av_log(avctx, AV_LOG_DEBUG, "Lowpass width %"PRIu16"\n", data);
 478             if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_width) {
 479                 av_log(avctx, AV_LOG_ERROR, "Invalid lowpass width\n");
 480                 ret = AVERROR(EINVAL);
 481                 break;
 482             }
 483             s->plane[s->channel_num].band[0][0].width  = data;
 484             s->plane[s->channel_num].band[0][0].stride = data;
 485         } else if (tag == LowpassHeight) {
 486             av_log(avctx, AV_LOG_DEBUG, "Lowpass height %"PRIu16"\n", data);
 487             if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_height) {
 488                 av_log(avctx, AV_LOG_ERROR, "Invalid lowpass height\n");
 489                 ret = AVERROR(EINVAL);
 490                 break;
 491             }
 492             s->plane[s->channel_num].band[0][0].height = data;
 493         } else if (tag == SampleType)
 494             av_log(avctx, AV_LOG_DEBUG, "Sample type? %"PRIu16"\n", data);
 495         else if (tag == TransformType) {
 496             if (data != 0) {
 497                 avpriv_report_missing_feature(avctx, "Transform type of %"PRIu16, data);
 498                 ret = AVERROR_PATCHWELCOME;
 499                 break;
 500             }
 501             av_log(avctx, AV_LOG_DEBUG, "Transform-type? %"PRIu16"\n", data);
 502         } else if (abstag >= 0x4000 && abstag <= 0x40ff) {
 503             if (abstag == 0x4001)
 504                 s->peak.level = 0;
 505             av_log(avctx, AV_LOG_DEBUG, "Small chunk length %d %s\n", data * 4, tag < 0 ? "optional" : "required");
 506             bytestream2_skipu(&gb, data * 4);
 507         } else if (tag == 23) {
 508             av_log(avctx, AV_LOG_DEBUG, "Skip frame\n");
 509             avpriv_report_missing_feature(avctx, "Skip frame");
 510             ret = AVERROR_PATCHWELCOME;
 511             break;
 512         } else if (tag == SampleIndexTable) {
 513             av_log(avctx, AV_LOG_DEBUG, "tag=2 header - skipping %i tag/value pairs\n", data);
 514             if (data > bytestream2_get_bytes_left(&gb) / 4) {
 515                 av_log(avctx, AV_LOG_ERROR, "too many tag/value pairs (%d)\n", data);
 516                 ret = AVERROR_INVALIDDATA;
 517                 break;
 518             }
 519             for (i = 0; i < data; i++) {
 520                 uint16_t tag2 = bytestream2_get_be16(&gb);
 521                 uint16_t val2 = bytestream2_get_be16(&gb);
 522                 av_log(avctx, AV_LOG_DEBUG, "Tag/Value = %x %x\n", tag2, val2);
 523             }
 524         } else if (tag == HighpassWidth) {
 525             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);
 526             if (data < 3) {
 527                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass width\n");
 528                 ret = AVERROR(EINVAL);
 529                 break;
 530             }
 531             s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;
 532             s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
 533         } else if (tag == HighpassHeight) {
 534             av_log(avctx, AV_LOG_DEBUG, "Highpass height %i\n", data);
 535             if (data < 3) {
 536                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass height\n");
 537                 ret = AVERROR(EINVAL);
 538                 break;
 539             }
 540             s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
 541         } else if (tag == BandWidth) {
 542             av_log(avctx, AV_LOG_DEBUG, "Highpass width2 %i\n", data);
 543             if (data < 3) {
 544                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass width2\n");
 545                 ret = AVERROR(EINVAL);
 546                 break;
 547             }
 548             s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;
 549             s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
 550         } else if (tag == BandHeight) {
 551             av_log(avctx, AV_LOG_DEBUG, "Highpass height2 %i\n", data);
 552             if (data < 3) {
 553                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass height2\n");
 554                 ret = AVERROR(EINVAL);
 555                 break;
 556             }
 557             s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
 558         } else if (tag == InputFormat) {
 559             av_log(avctx, AV_LOG_DEBUG, "Input format %i\n", data);
 560         } else if (tag == BandCodingFlags) {
 561             s->codebook = data & 0xf;
 562             s->difference_coding = (data >> 4) & 1;
 563             av_log(avctx, AV_LOG_DEBUG, "Other codebook? %i\n", s->codebook);
 564         } else if (tag == Precision) {
 565             av_log(avctx, AV_LOG_DEBUG, "Precision %i\n", data);
 566             if (!(data == 10 || data == 12)) {
 567                 av_log(avctx, AV_LOG_ERROR, "Invalid bits per channel\n");
 568                 ret = AVERROR(EINVAL);
 569                 break;
 570             }
 571             avctx->bits_per_raw_sample = s->bpc = data;
 572         } else if (tag == EncodedFormat) {
 573             av_log(avctx, AV_LOG_DEBUG, "Sample format? %i\n", data);
 574             if (data == 1) {
 575                 s->coded_format = AV_PIX_FMT_YUV422P10;
 576             } else if (data == 2) {
 577                 s->coded_format = AV_PIX_FMT_BAYER_RGGB16;
 578             } else if (data == 3) {
 579                 s->coded_format = AV_PIX_FMT_GBRP12;
 580             } else if (data == 4) {
 581                 s->coded_format = AV_PIX_FMT_GBRAP12;
 582             } else {
 583                 avpriv_report_missing_feature(avctx, "Sample format of %"PRIu16, data);
 584                 ret = AVERROR_PATCHWELCOME;
 585                 break;
 586             }
 587             planes = data == 2 ? 4 : av_pix_fmt_count_planes(s->coded_format);
 588         } else if (tag == -85) {
 589             av_log(avctx, AV_LOG_DEBUG, "Cropped height %"PRIu16"\n", data);
 590             s->cropped_height = data;
 591         } else if (tag == -75) {
 592             s->peak.offset &= ~0xffff;
 593             s->peak.offset |= (data & 0xffff);
 594             s->peak.base    = gb;
 595             s->peak.level   = 0;
 596         } else if (tag == -76) {
 597             s->peak.offset &= 0xffff;
 598             s->peak.offset |= (data & 0xffffU)<<16;
 599             s->peak.base    = gb;
 600             s->peak.level   = 0;
 601         } else if (tag == -74 && s->peak.offset) {
 602             s->peak.level = data;
 603             bytestream2_seek(&s->peak.base, s->peak.offset - 4, SEEK_CUR);
 604         } else
 605             av_log(avctx, AV_LOG_DEBUG,  "Unknown tag %i data %x\n", tag, data);
 606
 607         /* Some kind of end of header tag */
 608         if (tag == BitstreamMarker && data == 0x1a4a && s->coded_width && s->coded_height &&
 609             s->coded_format != AV_PIX_FMT_NONE) {
 610             if (s->a_width != s->coded_width || s->a_height != s->coded_height ||
 611                 s->a_format != s->coded_format) {
 612                 free_buffers(s);
 613                 if ((ret = alloc_buffers(avctx)) < 0) {
 614                     free_buffers(s);
 615                     return ret;
 616                 }
 617             }
 618             ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height);
 619             if (ret < 0)
 620                 return ret;
 621             if (s->cropped_height) {
 622                 unsigned height = s->cropped_height << (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16);
 623                 if (avctx->height < height)
 624                     return AVERROR_INVALIDDATA;
 625                 avctx->height = height;
 626             }
 627             frame.f->width =
 628             frame.f->height = 0;
 629
 630             if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
 631                 return ret;
 632
 633             s->coded_width = 0;
 634             s->coded_height = 0;
 635             s->coded_format = AV_PIX_FMT_NONE;
 636             got_buffer = 1;
 637         }
 638         coeff_data = s->plane[s->channel_num].subband[s->subband_num_actual];
 639
 640         /* Lowpass coefficients */
 641         if (tag == BitstreamMarker && data == 0xf0f && s->a_width && s->a_height) {
 642             int lowpass_height = s->plane[s->channel_num].band[0][0].height;
 643             int lowpass_width  = s->plane[s->channel_num].band[0][0].width;
 644             int lowpass_a_height = s->plane[s->channel_num].band[0][0].a_height;
 645             int lowpass_a_width  = s->plane[s->channel_num].band[0][0].a_width;
 646
 647             if (!got_buffer) {
 648                 av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 649                 ret = AVERROR(EINVAL);
 650                 goto end;
 651             }
 652
 653             if (lowpass_height > lowpass_a_height || lowpass_width > lowpass_a_width ||
 654                 lowpass_a_width * lowpass_a_height * sizeof(int16_t) > bytestream2_get_bytes_left(&gb)) {
 655                 av_log(avctx, AV_LOG_ERROR, "Too many lowpass coefficients\n");
 656                 ret = AVERROR(EINVAL);
 657                 goto end;
 658             }
 659
 660             av_log(avctx, AV_LOG_DEBUG, "Start of lowpass coeffs component %d height:%d, width:%d\n", s->channel_num, lowpass_height, lowpass_width);
 661             for (i = 0; i < lowpass_height; i++) {
 662                 for (j = 0; j < lowpass_width; j++)
 663                     coeff_data[j] = bytestream2_get_be16u(&gb);
 664
 665                 coeff_data += lowpass_width;
 666             }
 667
 668             /* Align to mod-4 position to continue reading tags */
 669             bytestream2_seek(&gb, bytestream2_tell(&gb) & 3, SEEK_CUR);
 670
 671             /* Copy last line of coefficients if odd height */
 672             if (lowpass_height & 1) {
 673                 memcpy(&coeff_data[lowpass_height * lowpass_width],
 674                        &coeff_data[(lowpass_height - 1) * lowpass_width],
 675                        lowpass_width * sizeof(*coeff_data));
 676             }
 677
 678             av_log(avctx, AV_LOG_DEBUG, "Lowpass coefficients %d\n", lowpass_width * lowpass_height);
 679         }
 680
 681         if (tag == BandHeader && s->subband_num_actual != 255 && s->a_width && s->a_height) {
 682             int highpass_height = s->plane[s->channel_num].band[s->level][s->subband_num].height;
 683             int highpass_width  = s->plane[s->channel_num].band[s->level][s->subband_num].width;
 684             int highpass_a_width = s->plane[s->channel_num].band[s->level][s->subband_num].a_width;
 685             int highpass_a_height = s->plane[s->channel_num].band[s->level][s->subband_num].a_height;
 686             int highpass_stride = s->plane[s->channel_num].band[s->level][s->subband_num].stride;
 687             int expected;
 688             int a_expected = highpass_a_height * highpass_a_width;
 689             int level, run, coeff;
 690             int count = 0, bytes;
 691
 692             if (!got_buffer) {
 693                 av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 694                 ret = AVERROR(EINVAL);
 695                 goto end;
 696             }
 697
 698             if (highpass_height > highpass_a_height || highpass_width > highpass_a_width || a_expected < highpass_height * (uint64_t)highpass_stride) {
 699                 av_log(avctx, AV_LOG_ERROR, "Too many highpass coefficients\n");
 700                 ret = AVERROR(EINVAL);
 701                 goto end;
 702             }
 703             expected = highpass_height * highpass_stride;
 704
 705             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);
 706
 707             init_get_bits(&s->gb, gb.buffer, bytestream2_get_bytes_left(&gb) * 8);
 708             {
 709                 OPEN_READER(re, &s->gb);
 710                 if (!s->codebook) {
 711                     while (1) {
 712                         UPDATE_CACHE(re, &s->gb);
 713                         GET_RL_VLC(level, run, re, &s->gb, s->table_9_rl_vlc,
 714                                    VLC_BITS, 3, 1);
 715
 716                         /* escape */
 717                         if (level == 64)
 718                             break;
 719
 720                         count += run;
 721
 722                         if (count > expected)
 723                             break;
 724
 725                         coeff = dequant_and_decompand(s, level, s->quantisation, 0);
 726                         for (i = 0; i < run; i++)
 727                             *coeff_data++ = coeff;
 728                     }
 729                 } else {
 730                     while (1) {
 731                         UPDATE_CACHE(re, &s->gb);
 732                         GET_RL_VLC(level, run, re, &s->gb, s->table_18_rl_vlc,
 733                                    VLC_BITS, 3, 1);
 734
 735                         /* escape */
 736                         if (level == 255 && run == 2)
 737                             break;
 738
 739                         count += run;
 740
 741                         if (count > expected)
 742                             break;
 743
 744                         coeff = dequant_and_decompand(s, level, s->quantisation, s->codebook);
 745                         for (i = 0; i < run; i++)
 746                             *coeff_data++ = coeff;
 747                     }
 748                 }
 749                 CLOSE_READER(re, &s->gb);
 750             }
 751
 752             if (count > expected) {
 753                 av_log(avctx, AV_LOG_ERROR, "Escape codeword not found, probably corrupt data\n");
 754                 ret = AVERROR(EINVAL);
 755                 goto end;
 756             }
 757             if (s->peak.level)
 758                 peak_table(coeff_data - count, &s->peak, count);
 759             if (s->difference_coding)
 760                 difference_coding(s->plane[s->channel_num].subband[s->subband_num_actual], highpass_width, highpass_height);
 761
 762             bytes = FFALIGN(AV_CEIL_RSHIFT(get_bits_count(&s->gb), 3), 4);
 763             if (bytes > bytestream2_get_bytes_left(&gb)) {
 764                 av_log(avctx, AV_LOG_ERROR, "Bitstream overread error\n");
 765                 ret = AVERROR(EINVAL);
 766                 goto end;
 767             } else
 768                 bytestream2_seek(&gb, bytes, SEEK_CUR);
 769
 770             av_log(avctx, AV_LOG_DEBUG, "End subband coeffs %i extra %i\n", count, count - expected);
 771             s->codebook = 0;
 772
 773             /* Copy last line of coefficients if odd height */
 774             if (highpass_height & 1) {
 775                 memcpy(&coeff_data[highpass_height * highpass_stride],
 776                        &coeff_data[(highpass_height - 1) * highpass_stride],
 777                        highpass_stride * sizeof(*coeff_data));
 778             }
 779         }
 780     }
 781
 782     if (!s->a_width || !s->a_height || s->a_format == AV_PIX_FMT_NONE ||
 783         s->coded_width || s->coded_height || s->coded_format != AV_PIX_FMT_NONE) {
 784         av_log(avctx, AV_LOG_ERROR, "Invalid dimensions\n");
 785         ret = AVERROR(EINVAL);
 786         goto end;
 787     }
 788
 789     if (!got_buffer) {
 790         av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 791         ret = AVERROR(EINVAL);
 792         goto end;
 793     }
 794
 795     planes = av_pix_fmt_count_planes(avctx->pix_fmt);
 796     if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16) {
 797         if (!s->progressive)
 798             return AVERROR_INVALIDDATA;
 799         planes = 4;
 800     }
 801
 802     for (plane = 0; plane < planes && !ret; plane++) {
 803         /* level 1 */
 804         int lowpass_height  = s->plane[plane].band[0][0].height;
 805         int lowpass_width   = s->plane[plane].band[0][0].width;
 806         int highpass_stride = s->plane[plane].band[0][1].stride;
 807         int act_plane = plane == 1 ? 2 : plane == 2 ? 1 : plane;
 808         ptrdiff_t dst_linesize;
 809         int16_t *low, *high, *output, *dst;
 810
 811         if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16) {
 812             act_plane = 0;
 813             dst_linesize = pic->linesize[act_plane];
 814         } else {
 815             dst_linesize = pic->linesize[act_plane] / 2;
 816         }
 817
 818         if (lowpass_height > s->plane[plane].band[0][0].a_height || lowpass_width > s->plane[plane].band[0][0].a_width ||
 819             !highpass_stride || s->plane[plane].band[0][1].width > s->plane[plane].band[0][1].a_width) {
 820             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 821             ret = AVERROR(EINVAL);
 822             goto end;
 823         }
 824
 825         av_log(avctx, AV_LOG_DEBUG, "Decoding level 1 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 826
 827         low    = s->plane[plane].subband[0];
 828         high   = s->plane[plane].subband[2];
 829         output = s->plane[plane].l_h[0];
 830         for (i = 0; i < lowpass_width; i++) {
 831             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 832             low++;
 833             high++;
 834             output++;
 835         }
 836
 837         low    = s->plane[plane].subband[1];
 838         high   = s->plane[plane].subband[3];
 839         output = s->plane[plane].l_h[1];
 840
 841         for (i = 0; i < lowpass_width; i++) {
 842             // note the stride of "low" is highpass_stride
 843             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 844             low++;
 845             high++;
 846             output++;
 847         }
 848
 849         low    = s->plane[plane].l_h[0];
 850         high   = s->plane[plane].l_h[1];
 851         output = s->plane[plane].subband[0];
 852         for (i = 0; i < lowpass_height * 2; i++) {
 853             horiz_filter(output, low, high, lowpass_width);
 854             low    += lowpass_width;
 855             high   += lowpass_width;
 856             output += lowpass_width * 2;
 857         }
 858         if (s->bpc == 12) {
 859             output = s->plane[plane].subband[0];
 860             for (i = 0; i < lowpass_height * 2; i++) {
 861                 for (j = 0; j < lowpass_width * 2; j++)
 862                     output[j] *= 4;
 863
 864                 output += lowpass_width * 2;
 865             }
 866         }
 867
 868         /* level 2 */
 869         lowpass_height  = s->plane[plane].band[1][1].height;
 870         lowpass_width   = s->plane[plane].band[1][1].width;
 871         highpass_stride = s->plane[plane].band[1][1].stride;
 872
 873         if (lowpass_height > s->plane[plane].band[1][1].a_height || lowpass_width > s->plane[plane].band[1][1].a_width ||
 874             !highpass_stride || s->plane[plane].band[1][1].width > s->plane[plane].band[1][1].a_width) {
 875             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 876             ret = AVERROR(EINVAL);
 877             goto end;
 878         }
 879
 880         av_log(avctx, AV_LOG_DEBUG, "Level 2 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 881
 882         low    = s->plane[plane].subband[0];
 883         high   = s->plane[plane].subband[5];
 884         output = s->plane[plane].l_h[3];
 885         for (i = 0; i < lowpass_width; i++) {
 886             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 887             low++;
 888             high++;
 889             output++;
 890         }
 891
 892         low    = s->plane[plane].subband[4];
 893         high   = s->plane[plane].subband[6];
 894         output = s->plane[plane].l_h[4];
 895         for (i = 0; i < lowpass_width; i++) {
 896             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 897             low++;
 898             high++;
 899             output++;
 900         }
 901
 902         low    = s->plane[plane].l_h[3];
 903         high   = s->plane[plane].l_h[4];
 904         output = s->plane[plane].subband[0];
 905         for (i = 0; i < lowpass_height * 2; i++) {
 906             horiz_filter(output, low, high, lowpass_width);
 907             low    += lowpass_width;
 908             high   += lowpass_width;
 909             output += lowpass_width * 2;
 910         }
 911
 912         output = s->plane[plane].subband[0];
 913         for (i = 0; i < lowpass_height * 2; i++) {
 914             for (j = 0; j < lowpass_width * 2; j++)
 915                 output[j] *= 4;
 916
 917             output += lowpass_width * 2;
 918         }
 919
 920         /* level 3 */
 921         lowpass_height  = s->plane[plane].band[2][1].height;
 922         lowpass_width   = s->plane[plane].band[2][1].width;
 923         highpass_stride = s->plane[plane].band[2][1].stride;
 924
 925         if (lowpass_height > s->plane[plane].band[2][1].a_height || lowpass_width > s->plane[plane].band[2][1].a_width ||
 926             !highpass_stride || s->plane[plane].band[2][1].width > s->plane[plane].band[2][1].a_width) {
 927             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 928             ret = AVERROR(EINVAL);
 929             goto end;
 930         }
 931
 932         av_log(avctx, AV_LOG_DEBUG, "Level 3 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 933         if (s->progressive) {
 934             low    = s->plane[plane].subband[0];
 935             high   = s->plane[plane].subband[8];
 936             output = s->plane[plane].l_h[6];
 937             for (i = 0; i < lowpass_width; i++) {
 938                 vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 939                 low++;
 940                 high++;
 941                 output++;
 942             }
 943
 944             low    = s->plane[plane].subband[7];
 945             high   = s->plane[plane].subband[9];
 946             output = s->plane[plane].l_h[7];
 947             for (i = 0; i < lowpass_width; i++) {
 948                 vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 949                 low++;
 950                 high++;
 951                 output++;
 952             }
 953
 954             dst = (int16_t *)pic->data[act_plane];
 955             if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16) {
 956                 if (plane & 1)
 957                     dst++;
 958                 if (plane > 1)
 959                     dst += pic->linesize[act_plane] >> 1;
 960             }
 961             low  = s->plane[plane].l_h[6];
 962             high = s->plane[plane].l_h[7];
 963
 964             if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16 &&
 965                 (lowpass_height * 2 > avctx->coded_height / 2 ||
 966                  lowpass_width  * 2 > avctx->coded_width  / 2    )
 967                 ) {
 968                 ret = AVERROR_INVALIDDATA;
 969                 goto end;
 970             }
 971
 972             for (i = 0; i < lowpass_height * 2; i++) {
 973                 if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16)
 974                     horiz_filter_clip_bayer(dst, low, high, lowpass_width, s->bpc);
 975                 else
 976                     horiz_filter_clip(dst, low, high, lowpass_width, s->bpc);
 977                 if (avctx->pix_fmt == AV_PIX_FMT_GBRAP12 && act_plane == 3)
 978                     process_alpha(dst, lowpass_width * 2);
 979                 low  += lowpass_width;
 980                 high += lowpass_width;
 981                 dst  += dst_linesize;
 982             }
 983         } else {
 984             av_log(avctx, AV_LOG_DEBUG, "interlaced frame ? %d", pic->interlaced_frame);
 985             pic->interlaced_frame = 1;
 986             low    = s->plane[plane].subband[0];
 987             high   = s->plane[plane].subband[7];
 988             output = s->plane[plane].l_h[6];
 989             for (i = 0; i < lowpass_height; i++) {
 990                 horiz_filter(output, low, high, lowpass_width);
 991                 low    += lowpass_width;
 992                 high   += lowpass_width;
 993                 output += lowpass_width * 2;
 994             }
 995
 996             low    = s->plane[plane].subband[8];
 997             high   = s->plane[plane].subband[9];
 998             output = s->plane[plane].l_h[7];
 999             for (i = 0; i < lowpass_height; i++) {
1000                 horiz_filter(output, low, high, lowpass_width);
1001                 low    += lowpass_width;
1002                 high   += lowpass_width;
1003                 output += lowpass_width * 2;
1004             }
1005
1006             dst  = (int16_t *)pic->data[act_plane];
1007             low  = s->plane[plane].l_h[6];
1008             high = s->plane[plane].l_h[7];
1009             for (i = 0; i < lowpass_height; i++) {
1010                 interlaced_vertical_filter(dst, low, high, lowpass_width * 2,  pic->linesize[act_plane]/2, act_plane);
1011                 low  += lowpass_width * 2;
1012                 high += lowpass_width * 2;
1013                 dst  += pic->linesize[act_plane];
1014             }
1015         }
1016     }
1017
1018
1019     if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16)
1020         process_bayer(pic);
1021 end:
1022     if (ret < 0)
1023         return ret;
1024
1025     *got_frame = 1;
1026     return avpkt->size;
1027 }
1028
1029 static av_cold int cfhd_close(AVCodecContext *avctx)
1030 {
1031     CFHDContext *s = avctx->priv_data;
1032
1033     free_buffers(s);
1034
1035     ff_free_vlc(&s->vlc_9);
1036     ff_free_vlc(&s->vlc_18);
1037
1038     return 0;
1039 }
1040
1041 AVCodec ff_cfhd_decoder = {
1042     .name             = "cfhd",
1043     .long_name        = NULL_IF_CONFIG_SMALL("Cineform HD"),
1044     .type             = AVMEDIA_TYPE_VIDEO,
1045     .id               = AV_CODEC_ID_CFHD,
1046     .priv_data_size   = sizeof(CFHDContext),
1047     .init             = cfhd_init,
1048     .close            = cfhd_close,
1049     .decode           = cfhd_decode,
1050     .capabilities     = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
1051     .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
1052 };