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 enum CFHDParam {
  44     ChannelCount     =  12,
  45     SubbandCount     =  14,
  46     ImageWidth       =  20,
  47     ImageHeight      =  21,
  48     LowpassPrecision =  35,
  49     SubbandNumber    =  48,
  50     Quantization     =  53,
  51     ChannelNumber    =  62,
  52     SampleFlags      =  68,
  53     BitsPerComponent = 101,
  54     ChannelWidth     = 104,
  55     ChannelHeight    = 105,
  56     PrescaleShift    = 109,
  57 };
  58
  59
  60
  61 static av_cold int cfhd_init(AVCodecContext *avctx)
  62 {
  63     CFHDContext *s = avctx->priv_data;
  64
  65     avctx->bits_per_raw_sample = 10;
  66     s->avctx                   = avctx;
  67
  68     return ff_cfhd_init_vlcs(s);
  69 }
  70
  71 static void init_plane_defaults(CFHDContext *s)
  72 {
  73     s->subband_num        = 0;
  74     s->level              = 0;
  75     s->subband_num_actual = 0;
  76 }
  77
  78 static void init_peak_table_defaults(CFHDContext *s)
  79 {
  80     s->peak.level  = 0;
  81     s->peak.offset = 0;
  82     memset(&s->peak.base, 0, sizeof(s->peak.base));
  83 }
  84
  85 static void init_frame_defaults(CFHDContext *s)
  86 {
  87     s->coded_width       = 0;
  88     s->coded_height      = 0;
  89     s->cropped_height    = 0;
  90     s->bpc               = 10;
  91     s->channel_cnt       = 4;
  92     s->subband_cnt       = SUBBAND_COUNT;
  93     s->channel_num       = 0;
  94     s->lowpass_precision = 16;
  95     s->quantisation      = 1;
  96     s->wavelet_depth     = 3;
  97     s->pshift            = 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 /* TODO: merge with VLC tables or use LUT */
 106 static inline int dequant_and_decompand(int level, int quantisation, int codebook)
 107 {
 108     if (codebook == 0 || codebook == 1) {
 109         int64_t abslevel = abs(level);
 110         if (level < 264)
 111             return (abslevel + ((768 * abslevel * abslevel * abslevel) / (255 * 255 * 255))) *
 112                FFSIGN(level) * quantisation;
 113         else
 114             return level * quantisation;
 115     } else
 116         return level * quantisation;
 117 }
 118
 119 static inline void difference_coding(int16_t *band, int width, int height)
 120 {
 121
 122     int i,j;
 123     for (i = 0; i < height; i++) {
 124         for (j = 1; j < width; j++) {
 125           band[j] += band[j-1];
 126         }
 127         band += width;
 128     }
 129 }
 130
 131 static inline void peak_table(int16_t *band, Peak *peak, int length)
 132 {
 133     int i;
 134     for (i = 0; i < length; i++)
 135         if (abs(band[i]) > peak->level)
 136             band[i] = bytestream2_get_le16(&peak->base);
 137 }
 138
 139 static inline void process_alpha(int16_t *alpha, int width)
 140 {
 141     int i, channel;
 142     for (i = 0; i < width; i++) {
 143         channel   = alpha[i];
 144         channel  -= ALPHA_COMPAND_DC_OFFSET;
 145         channel <<= 3;
 146         channel  *= ALPHA_COMPAND_GAIN;
 147         channel >>= 16;
 148         channel   = av_clip_uintp2(channel, 12);
 149         alpha[i]  = channel;
 150     }
 151 }
 152
 153 static inline void process_bayer(AVFrame *frame)
 154 {
 155     const int linesize = frame->linesize[0];
 156     uint16_t *r = (uint16_t *)frame->data[0];
 157     uint16_t *g1 = (uint16_t *)(frame->data[0] + 2);
 158     uint16_t *g2 = (uint16_t *)(frame->data[0] + frame->linesize[0]);
 159     uint16_t *b = (uint16_t *)(frame->data[0] + frame->linesize[0] + 2);
 160     const int mid = 2048;
 161
 162     for (int y = 0; y < frame->height >> 1; y++) {
 163         for (int x = 0; x < frame->width; x += 2) {
 164             int R, G1, G2, B;
 165             int g, rg, bg, gd;
 166
 167             g  = r[x];
 168             rg = g1[x];
 169             bg = g2[x];
 170             gd = b[x];
 171             gd -= mid;
 172
 173             R  = (rg - mid) * 2 + g;
 174             G1 = g + gd;
 175             G2 = g - gd;
 176             B  = (bg - mid) * 2 + g;
 177
 178             R  = av_clip_uintp2(R  * 16, 16);
 179             G1 = av_clip_uintp2(G1 * 16, 16);
 180             G2 = av_clip_uintp2(G2 * 16, 16);
 181             B  = av_clip_uintp2(B  * 16, 16);
 182
 183             r[x]  = R;
 184             g1[x] = G1;
 185             g2[x] = G2;
 186             b[x]  = B;
 187         }
 188
 189         r  += linesize;
 190         g1 += linesize;
 191         g2 += linesize;
 192         b  += linesize;
 193     }
 194 }
 195
 196 static inline void filter(int16_t *output, ptrdiff_t out_stride,
 197                           int16_t *low, ptrdiff_t low_stride,
 198                           int16_t *high, ptrdiff_t high_stride,
 199                           int len, int clip)
 200 {
 201     int16_t tmp;
 202     int i;
 203
 204     for (i = 0; i < len; i++) {
 205         if (i == 0) {
 206             tmp = (11*low[0*low_stride] - 4*low[1*low_stride] + low[2*low_stride] + 4) >> 3;
 207             output[(2*i+0)*out_stride] = (tmp + high[0*high_stride]) >> 1;
 208             if (clip)
 209                 output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
 210
 211             tmp = ( 5*low[0*low_stride] + 4*low[1*low_stride] - low[2*low_stride] + 4) >> 3;
 212             output[(2*i+1)*out_stride] = (tmp - high[0*high_stride]) >> 1;
 213             if (clip)
 214                 output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
 215         } else if (i == len-1) {
 216             tmp = ( 5*low[i*low_stride] + 4*low[(i-1)*low_stride] - low[(i-2)*low_stride] + 4) >> 3;
 217             output[(2*i+0)*out_stride] = (tmp + high[i*high_stride]) >> 1;
 218             if (clip)
 219                 output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
 220
 221             tmp = (11*low[i*low_stride] - 4*low[(i-1)*low_stride] + low[(i-2)*low_stride] + 4) >> 3;
 222             output[(2*i+1)*out_stride] = (tmp - high[i*high_stride]) >> 1;
 223             if (clip)
 224                 output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
 225         } else {
 226             tmp = (low[(i-1)*low_stride] - low[(i+1)*low_stride] + 4) >> 3;
 227             output[(2*i+0)*out_stride] = (tmp + low[i*low_stride] + high[i*high_stride]) >> 1;
 228             if (clip)
 229                 output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
 230
 231             tmp = (low[(i+1)*low_stride] - low[(i-1)*low_stride] + 4) >> 3;
 232             output[(2*i+1)*out_stride] = (tmp + low[i*low_stride] - high[i*high_stride]) >> 1;
 233             if (clip)
 234                 output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
 235         }
 236     }
 237 }
 238
 239 static inline void interlaced_vertical_filter(int16_t *output, int16_t *low, int16_t *high,
 240                          int width, int linesize, int plane)
 241 {
 242     int i;
 243     int16_t even, odd;
 244     for (i = 0; i < width; i++) {
 245         even = (low[i] - high[i])/2;
 246         odd  = (low[i] + high[i])/2;
 247         output[i]            = av_clip_uintp2(even, 10);
 248         output[i + linesize] = av_clip_uintp2(odd, 10);
 249     }
 250 }
 251 static void horiz_filter(int16_t *output, int16_t *low, int16_t *high,
 252                          int width)
 253 {
 254     filter(output, 1, low, 1, high, 1, width, 0);
 255 }
 256
 257 static void horiz_filter_clip(int16_t *output, int16_t *low, int16_t *high,
 258                               int width, int clip)
 259 {
 260     filter(output, 1, low, 1, high, 1, width, clip);
 261 }
 262
 263 static void horiz_filter_clip_bayer(int16_t *output, int16_t *low, int16_t *high,
 264                                     int width, int clip)
 265 {
 266     filter(output, 2, low, 1, high, 1, width, clip);
 267 }
 268
 269 static void vert_filter(int16_t *output, ptrdiff_t out_stride,
 270                         int16_t *low, ptrdiff_t low_stride,
 271                         int16_t *high, ptrdiff_t high_stride, int len)
 272 {
 273     filter(output, out_stride, low, low_stride, high, high_stride, len, 0);
 274 }
 275
 276 static void free_buffers(CFHDContext *s)
 277 {
 278     int i, j;
 279
 280     for (i = 0; i < FF_ARRAY_ELEMS(s->plane); i++) {
 281         av_freep(&s->plane[i].idwt_buf);
 282         av_freep(&s->plane[i].idwt_tmp);
 283
 284         for (j = 0; j < 9; j++)
 285             s->plane[i].subband[j] = NULL;
 286
 287         for (j = 0; j < 8; j++)
 288             s->plane[i].l_h[j] = NULL;
 289     }
 290     s->a_height = 0;
 291     s->a_width  = 0;
 292 }
 293
 294 static int alloc_buffers(AVCodecContext *avctx)
 295 {
 296     CFHDContext *s = avctx->priv_data;
 297     int i, j, ret, planes;
 298     int chroma_x_shift, chroma_y_shift;
 299     unsigned k;
 300
 301     if (s->coded_format == AV_PIX_FMT_BAYER_RGGB16) {
 302         s->coded_width *= 2;
 303         s->coded_height *= 2;
 304     }
 305
 306     if ((ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height)) < 0)
 307         return ret;
 308     avctx->pix_fmt = s->coded_format;
 309
 310     if ((ret = av_pix_fmt_get_chroma_sub_sample(s->coded_format,
 311                                                 &chroma_x_shift,
 312                                                 &chroma_y_shift)) < 0)
 313         return ret;
 314     planes = av_pix_fmt_count_planes(s->coded_format);
 315     if (s->coded_format == AV_PIX_FMT_BAYER_RGGB16) {
 316         planes = 4;
 317         chroma_x_shift = 1;
 318         chroma_y_shift = 1;
 319     }
 320
 321     for (i = 0; i < planes; i++) {
 322         int w8, h8, w4, h4, w2, h2;
 323         int width  = i ? avctx->width  >> chroma_x_shift : avctx->width;
 324         int height = i ? avctx->height >> chroma_y_shift : avctx->height;
 325         ptrdiff_t stride = FFALIGN(width  / 8, 8) * 8;
 326         if (chroma_y_shift)
 327             height = FFALIGN(height / 8, 2) * 8;
 328         s->plane[i].width  = width;
 329         s->plane[i].height = height;
 330         s->plane[i].stride = stride;
 331
 332         w8 = FFALIGN(s->plane[i].width  / 8, 8);
 333         h8 = height / 8;
 334         w4 = w8 * 2;
 335         h4 = h8 * 2;
 336         w2 = w4 * 2;
 337         h2 = h4 * 2;
 338
 339         s->plane[i].idwt_buf =
 340             av_mallocz_array(height * stride, sizeof(*s->plane[i].idwt_buf));
 341         s->plane[i].idwt_tmp =
 342             av_malloc_array(height * stride, sizeof(*s->plane[i].idwt_tmp));
 343         if (!s->plane[i].idwt_buf || !s->plane[i].idwt_tmp)
 344             return AVERROR(ENOMEM);
 345
 346         s->plane[i].subband[0] = s->plane[i].idwt_buf;
 347         s->plane[i].subband[1] = s->plane[i].idwt_buf + 2 * w8 * h8;
 348         s->plane[i].subband[2] = s->plane[i].idwt_buf + 1 * w8 * h8;
 349         s->plane[i].subband[3] = s->plane[i].idwt_buf + 3 * w8 * h8;
 350         s->plane[i].subband[4] = s->plane[i].idwt_buf + 2 * w4 * h4;
 351         s->plane[i].subband[5] = s->plane[i].idwt_buf + 1 * w4 * h4;
 352         s->plane[i].subband[6] = s->plane[i].idwt_buf + 3 * w4 * h4;
 353         s->plane[i].subband[7] = s->plane[i].idwt_buf + 2 * w2 * h2;
 354         s->plane[i].subband[8] = s->plane[i].idwt_buf + 1 * w2 * h2;
 355         s->plane[i].subband[9] = s->plane[i].idwt_buf + 3 * w2 * h2;
 356
 357         for (j = 0; j < DWT_LEVELS; j++) {
 358             for (k = 0; k < FF_ARRAY_ELEMS(s->plane[i].band[j]); k++) {
 359                 s->plane[i].band[j][k].a_width  = w8 << j;
 360                 s->plane[i].band[j][k].a_height = h8 << j;
 361             }
 362         }
 363
 364         /* ll2 and ll1 commented out because they are done in-place */
 365         s->plane[i].l_h[0] = s->plane[i].idwt_tmp;
 366         s->plane[i].l_h[1] = s->plane[i].idwt_tmp + 2 * w8 * h8;
 367         // s->plane[i].l_h[2] = ll2;
 368         s->plane[i].l_h[3] = s->plane[i].idwt_tmp;
 369         s->plane[i].l_h[4] = s->plane[i].idwt_tmp + 2 * w4 * h4;
 370         // s->plane[i].l_h[5] = ll1;
 371         s->plane[i].l_h[6] = s->plane[i].idwt_tmp;
 372         s->plane[i].l_h[7] = s->plane[i].idwt_tmp + 2 * w2 * h2;
 373     }
 374
 375     s->a_height = s->coded_height;
 376     s->a_width  = s->coded_width;
 377     s->a_format = s->coded_format;
 378
 379     return 0;
 380 }
 381
 382 static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
 383                        AVPacket *avpkt)
 384 {
 385     CFHDContext *s = avctx->priv_data;
 386     GetByteContext gb;
 387     ThreadFrame frame = { .f = data };
 388     AVFrame *pic = data;
 389     int ret = 0, i, j, planes, plane, got_buffer = 0;
 390     int16_t *coeff_data;
 391
 392     s->coded_format = AV_PIX_FMT_YUV422P10;
 393     init_frame_defaults(s);
 394     planes = av_pix_fmt_count_planes(s->coded_format);
 395
 396     bytestream2_init(&gb, avpkt->data, avpkt->size);
 397
 398     while (bytestream2_get_bytes_left(&gb) > 4) {
 399         /* Bit weird but implement the tag parsing as the spec says */
 400         uint16_t tagu   = bytestream2_get_be16(&gb);
 401         int16_t tag     = (int16_t)tagu;
 402         int8_t tag8     = (int8_t)(tagu >> 8);
 403         uint16_t abstag = abs(tag);
 404         int8_t abs_tag8 = abs(tag8);
 405         uint16_t data   = bytestream2_get_be16(&gb);
 406         if (abs_tag8 >= 0x60 && abs_tag8 <= 0x6f) {
 407             av_log(avctx, AV_LOG_DEBUG, "large len %x\n", ((tagu & 0xff) << 16) | data);
 408         } else if (tag == SampleFlags) {
 409             av_log(avctx, AV_LOG_DEBUG, "Progressive?%"PRIu16"\n", data);
 410             s->progressive = data & 0x0001;
 411         } else if (tag == ImageWidth) {
 412             av_log(avctx, AV_LOG_DEBUG, "Width %"PRIu16"\n", data);
 413             s->coded_width = data;
 414         } else if (tag == ImageHeight) {
 415             av_log(avctx, AV_LOG_DEBUG, "Height %"PRIu16"\n", data);
 416             s->coded_height = data;
 417         } else if (tag == 101) {
 418             av_log(avctx, AV_LOG_DEBUG, "Bits per component: %"PRIu16"\n", data);
 419             if (data < 1 || data > 31) {
 420                 av_log(avctx, AV_LOG_ERROR, "Bits per component %d is invalid\n", data);
 421                 ret = AVERROR(EINVAL);
 422                 break;
 423             }
 424             s->bpc = data;
 425         } else if (tag == ChannelCount) {
 426             av_log(avctx, AV_LOG_DEBUG, "Channel Count: %"PRIu16"\n", data);
 427             s->channel_cnt = data;
 428             if (data > 4) {
 429                 av_log(avctx, AV_LOG_ERROR, "Channel Count of %"PRIu16" is unsupported\n", data);
 430                 ret = AVERROR_PATCHWELCOME;
 431                 break;
 432             }
 433         } else if (tag == SubbandCount) {
 434             av_log(avctx, AV_LOG_DEBUG, "Subband Count: %"PRIu16"\n", data);
 435             if (data != SUBBAND_COUNT) {
 436                 av_log(avctx, AV_LOG_ERROR, "Subband Count of %"PRIu16" is unsupported\n", data);
 437                 ret = AVERROR_PATCHWELCOME;
 438                 break;
 439             }
 440         } else if (tag == ChannelNumber) {
 441             s->channel_num = data;
 442             av_log(avctx, AV_LOG_DEBUG, "Channel number %"PRIu16"\n", data);
 443             if (s->channel_num >= planes) {
 444                 av_log(avctx, AV_LOG_ERROR, "Invalid channel number\n");
 445                 ret = AVERROR(EINVAL);
 446                 break;
 447             }
 448             init_plane_defaults(s);
 449         } else if (tag == SubbandNumber) {
 450             if (s->subband_num != 0 && data == 1)  // hack
 451                 s->level++;
 452             av_log(avctx, AV_LOG_DEBUG, "Subband number %"PRIu16"\n", data);
 453             s->subband_num = data;
 454             if (s->level >= DWT_LEVELS) {
 455                 av_log(avctx, AV_LOG_ERROR, "Invalid level\n");
 456                 ret = AVERROR(EINVAL);
 457                 break;
 458             }
 459             if (s->subband_num > 3) {
 460                 av_log(avctx, AV_LOG_ERROR, "Invalid subband number\n");
 461                 ret = AVERROR(EINVAL);
 462                 break;
 463             }
 464         } else if (tag == 51) {
 465             av_log(avctx, AV_LOG_DEBUG, "Subband number actual %"PRIu16"\n", data);
 466             s->subband_num_actual = data;
 467             if (s->subband_num_actual >= 10) {
 468                 av_log(avctx, AV_LOG_ERROR, "Invalid subband number actual\n");
 469                 ret = AVERROR(EINVAL);
 470                 break;
 471             }
 472         } else if (tag == LowpassPrecision)
 473             av_log(avctx, AV_LOG_DEBUG, "Lowpass precision bits: %"PRIu16"\n", data);
 474         else if (tag == Quantization) {
 475             s->quantisation = data;
 476             av_log(avctx, AV_LOG_DEBUG, "Quantisation: %"PRIu16"\n", data);
 477         } else if (tag == PrescaleShift) {
 478             s->prescale_shift[0] = (data >> 0) & 0x7;
 479             s->prescale_shift[1] = (data >> 3) & 0x7;
 480             s->prescale_shift[2] = (data >> 6) & 0x7;
 481             av_log(avctx, AV_LOG_DEBUG, "Prescale shift (VC-5): %x\n", data);
 482         } else if (tag == 27) {
 483             av_log(avctx, AV_LOG_DEBUG, "Lowpass width %"PRIu16"\n", data);
 484             if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_width) {
 485                 av_log(avctx, AV_LOG_ERROR, "Invalid lowpass width\n");
 486                 ret = AVERROR(EINVAL);
 487                 break;
 488             }
 489             s->plane[s->channel_num].band[0][0].width  = data;
 490             s->plane[s->channel_num].band[0][0].stride = data;
 491         } else if (tag == 28) {
 492             av_log(avctx, AV_LOG_DEBUG, "Lowpass height %"PRIu16"\n", data);
 493             if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_height) {
 494                 av_log(avctx, AV_LOG_ERROR, "Invalid lowpass height\n");
 495                 ret = AVERROR(EINVAL);
 496                 break;
 497             }
 498             s->plane[s->channel_num].band[0][0].height = data;
 499         } else if (tag == 1)
 500             av_log(avctx, AV_LOG_DEBUG, "Sample type? %"PRIu16"\n", data);
 501         else if (tag == 10) {
 502             if (data != 0) {
 503                 avpriv_report_missing_feature(avctx, "Transform type of %"PRIu16, data);
 504                 ret = AVERROR_PATCHWELCOME;
 505                 break;
 506             }
 507             av_log(avctx, AV_LOG_DEBUG, "Transform-type? %"PRIu16"\n", data);
 508         } else if (abstag >= 0x4000 && abstag <= 0x40ff) {
 509             if (abstag == 0x4001)
 510                 s->peak.level = 0;
 511             av_log(avctx, AV_LOG_DEBUG, "Small chunk length %d %s\n", data * 4, tag < 0 ? "optional" : "required");
 512             bytestream2_skipu(&gb, data * 4);
 513         } else if (tag == 23) {
 514             av_log(avctx, AV_LOG_DEBUG, "Skip frame\n");
 515             avpriv_report_missing_feature(avctx, "Skip frame");
 516             ret = AVERROR_PATCHWELCOME;
 517             break;
 518         } else if (tag == 2) {
 519             av_log(avctx, AV_LOG_DEBUG, "tag=2 header - skipping %i tag/value pairs\n", data);
 520             if (data > bytestream2_get_bytes_left(&gb) / 4) {
 521                 av_log(avctx, AV_LOG_ERROR, "too many tag/value pairs (%d)\n", data);
 522                 ret = AVERROR_INVALIDDATA;
 523                 break;
 524             }
 525             for (i = 0; i < data; i++) {
 526                 uint16_t tag2 = bytestream2_get_be16(&gb);
 527                 uint16_t val2 = bytestream2_get_be16(&gb);
 528                 av_log(avctx, AV_LOG_DEBUG, "Tag/Value = %x %x\n", tag2, val2);
 529             }
 530         } else if (tag == 41) {
 531             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);
 532             if (data < 3) {
 533                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass width\n");
 534                 ret = AVERROR(EINVAL);
 535                 break;
 536             }
 537             s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;
 538             s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
 539         } else if (tag == 42) {
 540             av_log(avctx, AV_LOG_DEBUG, "Highpass height %i\n", data);
 541             if (data < 3) {
 542                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass height\n");
 543                 ret = AVERROR(EINVAL);
 544                 break;
 545             }
 546             s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
 547         } else if (tag == 49) {
 548             av_log(avctx, AV_LOG_DEBUG, "Highpass width2 %i\n", data);
 549             if (data < 3) {
 550                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass width2\n");
 551                 ret = AVERROR(EINVAL);
 552                 break;
 553             }
 554             s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;
 555             s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
 556         } else if (tag == 50) {
 557             av_log(avctx, AV_LOG_DEBUG, "Highpass height2 %i\n", data);
 558             if (data < 3) {
 559                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass height2\n");
 560                 ret = AVERROR(EINVAL);
 561                 break;
 562             }
 563             s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
 564         } else if (tag == 71) {
 565             s->codebook = data;
 566             av_log(avctx, AV_LOG_DEBUG, "Codebook %i\n", s->codebook);
 567         } else if (tag == 72) {
 568             s->codebook = data & 0xf;
 569             s->difference_coding = (data >> 4) & 1;
 570             av_log(avctx, AV_LOG_DEBUG, "Other codebook? %i\n", s->codebook);
 571         } else if (tag == 70) {
 572             av_log(avctx, AV_LOG_DEBUG, "Subsampling or bit-depth flag? %i\n", data);
 573             if (!(data == 10 || data == 12)) {
 574                 av_log(avctx, AV_LOG_ERROR, "Invalid bits per channel\n");
 575                 ret = AVERROR(EINVAL);
 576                 break;
 577             }
 578             s->bpc = data;
 579         } else if (tag == 84) {
 580             av_log(avctx, AV_LOG_DEBUG, "Sample format? %i\n", data);
 581             if (data == 1) {
 582                 s->coded_format = AV_PIX_FMT_YUV422P10;
 583             } else if (data == 2) {
 584                 s->coded_format = AV_PIX_FMT_BAYER_RGGB16;
 585             } else if (data == 3) {
 586                 s->coded_format = AV_PIX_FMT_GBRP12;
 587             } else if (data == 4) {
 588                 s->coded_format = AV_PIX_FMT_GBRAP12;
 589             } else {
 590                 avpriv_report_missing_feature(avctx, "Sample format of %"PRIu16, data);
 591                 ret = AVERROR_PATCHWELCOME;
 592                 break;
 593             }
 594             planes = data == 2 ? 4 : av_pix_fmt_count_planes(s->coded_format);
 595         } else if (tag == -85) {
 596             av_log(avctx, AV_LOG_DEBUG, "Cropped height %"PRIu16"\n", data);
 597             s->cropped_height = data;
 598         } else if (tag == -75) {
 599             s->peak.offset &= ~0xffff;
 600             s->peak.offset |= (data & 0xffff);
 601             s->peak.base    = gb;
 602             s->peak.level   = 0;
 603         } else if (tag == -76) {
 604             s->peak.offset &= 0xffff;
 605             s->peak.offset |= (data & 0xffffU)<<16;
 606             s->peak.base    = gb;
 607             s->peak.level   = 0;
 608         } else if (tag == -74 && s->peak.offset) {
 609             s->peak.level = data;
 610             bytestream2_seek(&s->peak.base, s->peak.offset - 4, SEEK_CUR);
 611         } else
 612             av_log(avctx, AV_LOG_DEBUG,  "Unknown tag %i data %x\n", tag, data);
 613
 614         /* Some kind of end of header tag */
 615         if (tag == 4 && data == 0x1a4a && s->coded_width && s->coded_height &&
 616             s->coded_format != AV_PIX_FMT_NONE) {
 617             if (s->a_width != s->coded_width || s->a_height != s->coded_height ||
 618                 s->a_format != s->coded_format) {
 619                 free_buffers(s);
 620                 if ((ret = alloc_buffers(avctx)) < 0) {
 621                     free_buffers(s);
 622                     return ret;
 623                 }
 624             }
 625             ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height);
 626             if (ret < 0)
 627                 return ret;
 628             if (s->cropped_height) {
 629                 unsigned height = s->cropped_height << (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16);
 630                 if (avctx->height < height)
 631                     return AVERROR_INVALIDDATA;
 632                 avctx->height = height;
 633             }
 634             frame.f->width =
 635             frame.f->height = 0;
 636
 637             if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
 638                 return ret;
 639
 640             s->coded_width = 0;
 641             s->coded_height = 0;
 642             s->coded_format = AV_PIX_FMT_NONE;
 643             got_buffer = 1;
 644         }
 645         coeff_data = s->plane[s->channel_num].subband[s->subband_num_actual];
 646
 647         /* Lowpass coefficients */
 648         if (tag == 4 && data == 0xf0f && s->a_width && s->a_height) {
 649             int lowpass_height = s->plane[s->channel_num].band[0][0].height;
 650             int lowpass_width  = s->plane[s->channel_num].band[0][0].width;
 651             int lowpass_a_height = s->plane[s->channel_num].band[0][0].a_height;
 652             int lowpass_a_width  = s->plane[s->channel_num].band[0][0].a_width;
 653
 654             if (!got_buffer) {
 655                 av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 656                 ret = AVERROR(EINVAL);
 657                 goto end;
 658             }
 659
 660             if (lowpass_height > lowpass_a_height || lowpass_width > lowpass_a_width ||
 661                 lowpass_a_width * lowpass_a_height * sizeof(int16_t) > bytestream2_get_bytes_left(&gb)) {
 662                 av_log(avctx, AV_LOG_ERROR, "Too many lowpass coefficients\n");
 663                 ret = AVERROR(EINVAL);
 664                 goto end;
 665             }
 666
 667             av_log(avctx, AV_LOG_DEBUG, "Start of lowpass coeffs component %d height:%d, width:%d\n", s->channel_num, lowpass_height, lowpass_width);
 668             for (i = 0; i < lowpass_height; i++) {
 669                 for (j = 0; j < lowpass_width; j++)
 670                     coeff_data[j] = bytestream2_get_be16u(&gb);
 671
 672                 coeff_data += lowpass_width;
 673             }
 674
 675             /* Align to mod-4 position to continue reading tags */
 676             bytestream2_seek(&gb, bytestream2_tell(&gb) & 3, SEEK_CUR);
 677
 678             /* Copy last line of coefficients if odd height */
 679             if (lowpass_height & 1) {
 680                 memcpy(&coeff_data[lowpass_height * lowpass_width],
 681                        &coeff_data[(lowpass_height - 1) * lowpass_width],
 682                        lowpass_width * sizeof(*coeff_data));
 683             }
 684
 685             av_log(avctx, AV_LOG_DEBUG, "Lowpass coefficients %d\n", lowpass_width * lowpass_height);
 686         }
 687
 688         if (tag == 55 && s->subband_num_actual != 255 && s->a_width && s->a_height) {
 689             int highpass_height = s->plane[s->channel_num].band[s->level][s->subband_num].height;
 690             int highpass_width  = s->plane[s->channel_num].band[s->level][s->subband_num].width;
 691             int highpass_a_width = s->plane[s->channel_num].band[s->level][s->subband_num].a_width;
 692             int highpass_a_height = s->plane[s->channel_num].band[s->level][s->subband_num].a_height;
 693             int highpass_stride = s->plane[s->channel_num].band[s->level][s->subband_num].stride;
 694             int expected;
 695             int a_expected = highpass_a_height * highpass_a_width;
 696             int level, run, coeff;
 697             int count = 0, bytes;
 698
 699             if (!got_buffer) {
 700                 av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 701                 ret = AVERROR(EINVAL);
 702                 goto end;
 703             }
 704
 705             if (highpass_height > highpass_a_height || highpass_width > highpass_a_width || a_expected < highpass_height * (uint64_t)highpass_stride) {
 706                 av_log(avctx, AV_LOG_ERROR, "Too many highpass coefficients\n");
 707                 ret = AVERROR(EINVAL);
 708                 goto end;
 709             }
 710             expected = highpass_height * highpass_stride;
 711
 712             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);
 713
 714             init_get_bits(&s->gb, gb.buffer, bytestream2_get_bytes_left(&gb) * 8);
 715             {
 716                 OPEN_READER(re, &s->gb);
 717                 if (!s->codebook) {
 718                     while (1) {
 719                         UPDATE_CACHE(re, &s->gb);
 720                         GET_RL_VLC(level, run, re, &s->gb, s->table_9_rl_vlc,
 721                                    VLC_BITS, 3, 1);
 722
 723                         /* escape */
 724                         if (level == 64)
 725                             break;
 726
 727                         count += run;
 728
 729                         if (count > expected)
 730                             break;
 731
 732                         coeff = dequant_and_decompand(level, s->quantisation, 0);
 733                         for (i = 0; i < run; i++)
 734                             *coeff_data++ = coeff;
 735                     }
 736                 } else {
 737                     while (1) {
 738                         UPDATE_CACHE(re, &s->gb);
 739                         GET_RL_VLC(level, run, re, &s->gb, s->table_18_rl_vlc,
 740                                    VLC_BITS, 3, 1);
 741
 742                         /* escape */
 743                         if (level == 255 && run == 2)
 744                             break;
 745
 746                         count += run;
 747
 748                         if (count > expected)
 749                             break;
 750
 751                         coeff = dequant_and_decompand(level, s->quantisation, s->codebook);
 752                         for (i = 0; i < run; i++)
 753                             *coeff_data++ = coeff;
 754                     }
 755                 }
 756                 CLOSE_READER(re, &s->gb);
 757             }
 758
 759             if (count > expected) {
 760                 av_log(avctx, AV_LOG_ERROR, "Escape codeword not found, probably corrupt data\n");
 761                 ret = AVERROR(EINVAL);
 762                 goto end;
 763             }
 764             if (s->peak.level)
 765                 peak_table(coeff_data - count, &s->peak, count);
 766             if (s->difference_coding)
 767                 difference_coding(s->plane[s->channel_num].subband[s->subband_num_actual], highpass_width, highpass_height);
 768
 769             bytes = FFALIGN(AV_CEIL_RSHIFT(get_bits_count(&s->gb), 3), 4);
 770             if (bytes > bytestream2_get_bytes_left(&gb)) {
 771                 av_log(avctx, AV_LOG_ERROR, "Bitstream overread error\n");
 772                 ret = AVERROR(EINVAL);
 773                 goto end;
 774             } else
 775                 bytestream2_seek(&gb, bytes, SEEK_CUR);
 776
 777             av_log(avctx, AV_LOG_DEBUG, "End subband coeffs %i extra %i\n", count, count - expected);
 778             s->codebook = 0;
 779
 780             /* Copy last line of coefficients if odd height */
 781             if (highpass_height & 1) {
 782                 memcpy(&coeff_data[highpass_height * highpass_stride],
 783                        &coeff_data[(highpass_height - 1) * highpass_stride],
 784                        highpass_stride * sizeof(*coeff_data));
 785             }
 786         }
 787     }
 788
 789     if (!s->a_width || !s->a_height || s->a_format == AV_PIX_FMT_NONE ||
 790         s->coded_width || s->coded_height || s->coded_format != AV_PIX_FMT_NONE) {
 791         av_log(avctx, AV_LOG_ERROR, "Invalid dimensions\n");
 792         ret = AVERROR(EINVAL);
 793         goto end;
 794     }
 795
 796     if (!got_buffer) {
 797         av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 798         ret = AVERROR(EINVAL);
 799         goto end;
 800     }
 801
 802     planes = av_pix_fmt_count_planes(avctx->pix_fmt);
 803     if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16) {
 804         if (!s->progressive)
 805             return AVERROR_INVALIDDATA;
 806         planes = 4;
 807     }
 808
 809     for (plane = 0; plane < planes && !ret; plane++) {
 810         /* level 1 */
 811         int lowpass_height  = s->plane[plane].band[0][0].height;
 812         int lowpass_width   = s->plane[plane].band[0][0].width;
 813         int highpass_stride = s->plane[plane].band[0][1].stride;
 814         int act_plane = plane == 1 ? 2 : plane == 2 ? 1 : plane;
 815         ptrdiff_t dst_linesize;
 816         int16_t *low, *high, *output, *dst;
 817
 818         if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16) {
 819             act_plane = 0;
 820             dst_linesize = pic->linesize[act_plane];
 821         } else {
 822             dst_linesize = pic->linesize[act_plane] / 2;
 823         }
 824
 825         if (lowpass_height > s->plane[plane].band[0][0].a_height || lowpass_width > s->plane[plane].band[0][0].a_width ||
 826             !highpass_stride || s->plane[plane].band[0][1].width > s->plane[plane].band[0][1].a_width) {
 827             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 828             ret = AVERROR(EINVAL);
 829             goto end;
 830         }
 831
 832         av_log(avctx, AV_LOG_DEBUG, "Decoding level 1 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 833
 834         low    = s->plane[plane].subband[0];
 835         high   = s->plane[plane].subband[2];
 836         output = s->plane[plane].l_h[0];
 837         for (i = 0; i < lowpass_width; i++) {
 838             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 839             low++;
 840             high++;
 841             output++;
 842         }
 843
 844         low    = s->plane[plane].subband[1];
 845         high   = s->plane[plane].subband[3];
 846         output = s->plane[plane].l_h[1];
 847
 848         for (i = 0; i < lowpass_width; i++) {
 849             // note the stride of "low" is highpass_stride
 850             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 851             low++;
 852             high++;
 853             output++;
 854         }
 855
 856         low    = s->plane[plane].l_h[0];
 857         high   = s->plane[plane].l_h[1];
 858         output = s->plane[plane].subband[0];
 859         for (i = 0; i < lowpass_height * 2; i++) {
 860             horiz_filter(output, low, high, lowpass_width);
 861             low    += lowpass_width;
 862             high   += lowpass_width;
 863             output += lowpass_width * 2;
 864         }
 865         if (s->bpc == 12) {
 866             output = s->plane[plane].subband[0];
 867             for (i = 0; i < lowpass_height * 2; i++) {
 868                 for (j = 0; j < lowpass_width * 2; j++)
 869                     output[j] *= 4;
 870
 871                 output += lowpass_width * 2;
 872             }
 873         }
 874
 875         /* level 2 */
 876         lowpass_height  = s->plane[plane].band[1][1].height;
 877         lowpass_width   = s->plane[plane].band[1][1].width;
 878         highpass_stride = s->plane[plane].band[1][1].stride;
 879
 880         if (lowpass_height > s->plane[plane].band[1][1].a_height || lowpass_width > s->plane[plane].band[1][1].a_width ||
 881             !highpass_stride || s->plane[plane].band[1][1].width > s->plane[plane].band[1][1].a_width) {
 882             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 883             ret = AVERROR(EINVAL);
 884             goto end;
 885         }
 886
 887         av_log(avctx, AV_LOG_DEBUG, "Level 2 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 888
 889         low    = s->plane[plane].subband[0];
 890         high   = s->plane[plane].subband[5];
 891         output = s->plane[plane].l_h[3];
 892         for (i = 0; i < lowpass_width; i++) {
 893             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 894             low++;
 895             high++;
 896             output++;
 897         }
 898
 899         low    = s->plane[plane].subband[4];
 900         high   = s->plane[plane].subband[6];
 901         output = s->plane[plane].l_h[4];
 902         for (i = 0; i < lowpass_width; i++) {
 903             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 904             low++;
 905             high++;
 906             output++;
 907         }
 908
 909         low    = s->plane[plane].l_h[3];
 910         high   = s->plane[plane].l_h[4];
 911         output = s->plane[plane].subband[0];
 912         for (i = 0; i < lowpass_height * 2; i++) {
 913             horiz_filter(output, low, high, lowpass_width);
 914             low    += lowpass_width;
 915             high   += lowpass_width;
 916             output += lowpass_width * 2;
 917         }
 918
 919         output = s->plane[plane].subband[0];
 920         for (i = 0; i < lowpass_height * 2; i++) {
 921             for (j = 0; j < lowpass_width * 2; j++)
 922                 output[j] *= 4;
 923
 924             output += lowpass_width * 2;
 925         }
 926
 927         /* level 3 */
 928         lowpass_height  = s->plane[plane].band[2][1].height;
 929         lowpass_width   = s->plane[plane].band[2][1].width;
 930         highpass_stride = s->plane[plane].band[2][1].stride;
 931
 932         if (lowpass_height > s->plane[plane].band[2][1].a_height || lowpass_width > s->plane[plane].band[2][1].a_width ||
 933             !highpass_stride || s->plane[plane].band[2][1].width > s->plane[plane].band[2][1].a_width) {
 934             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 935             ret = AVERROR(EINVAL);
 936             goto end;
 937         }
 938
 939         av_log(avctx, AV_LOG_DEBUG, "Level 3 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 940         if (s->progressive) {
 941             low    = s->plane[plane].subband[0];
 942             high   = s->plane[plane].subband[8];
 943             output = s->plane[plane].l_h[6];
 944             for (i = 0; i < lowpass_width; i++) {
 945                 vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 946                 low++;
 947                 high++;
 948                 output++;
 949             }
 950
 951             low    = s->plane[plane].subband[7];
 952             high   = s->plane[plane].subband[9];
 953             output = s->plane[plane].l_h[7];
 954             for (i = 0; i < lowpass_width; i++) {
 955                 vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 956                 low++;
 957                 high++;
 958                 output++;
 959             }
 960
 961             dst = (int16_t *)pic->data[act_plane];
 962             if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16) {
 963                 if (plane & 1)
 964                     dst++;
 965                 if (plane > 1)
 966                     dst += pic->linesize[act_plane] >> 1;
 967             }
 968             low  = s->plane[plane].l_h[6];
 969             high = s->plane[plane].l_h[7];
 970
 971             if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16 &&
 972                 (lowpass_height * 2 > avctx->coded_height / 2 ||
 973                  lowpass_width  * 2 > avctx->coded_width  / 2    )
 974                 ) {
 975                 ret = AVERROR_INVALIDDATA;
 976                 goto end;
 977             }
 978
 979             for (i = 0; i < lowpass_height * 2; i++) {
 980                 if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16)
 981                     horiz_filter_clip_bayer(dst, low, high, lowpass_width, s->bpc);
 982                 else
 983                     horiz_filter_clip(dst, low, high, lowpass_width, s->bpc);
 984                 if (avctx->pix_fmt == AV_PIX_FMT_GBRAP12 && act_plane == 3)
 985                     process_alpha(dst, lowpass_width * 2);
 986                 low  += lowpass_width;
 987                 high += lowpass_width;
 988                 dst  += dst_linesize;
 989             }
 990         } else {
 991             av_log(avctx, AV_LOG_DEBUG, "interlaced frame ? %d", pic->interlaced_frame);
 992             pic->interlaced_frame = 1;
 993             low    = s->plane[plane].subband[0];
 994             high   = s->plane[plane].subband[7];
 995             output = s->plane[plane].l_h[6];
 996             for (i = 0; i < lowpass_height; i++) {
 997                 horiz_filter(output, low, high, lowpass_width);
 998                 low    += lowpass_width;
 999                 high   += lowpass_width;
1000                 output += lowpass_width * 2;
1001             }
1002
1003             low    = s->plane[plane].subband[8];
1004             high   = s->plane[plane].subband[9];
1005             output = s->plane[plane].l_h[7];
1006             for (i = 0; i < lowpass_height; i++) {
1007                 horiz_filter(output, low, high, lowpass_width);
1008                 low    += lowpass_width;
1009                 high   += lowpass_width;
1010                 output += lowpass_width * 2;
1011             }
1012
1013             dst  = (int16_t *)pic->data[act_plane];
1014             low  = s->plane[plane].l_h[6];
1015             high = s->plane[plane].l_h[7];
1016             for (i = 0; i < lowpass_height; i++) {
1017                 interlaced_vertical_filter(dst, low, high, lowpass_width * 2,  pic->linesize[act_plane]/2, act_plane);
1018                 low  += lowpass_width * 2;
1019                 high += lowpass_width * 2;
1020                 dst  += pic->linesize[act_plane];
1021             }
1022         }
1023     }
1024
1025
1026     if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16)
1027         process_bayer(pic);
1028 end:
1029     if (ret < 0)
1030         return ret;
1031
1032     *got_frame = 1;
1033     return avpkt->size;
1034 }
1035
1036 static av_cold int cfhd_close(AVCodecContext *avctx)
1037 {
1038     CFHDContext *s = avctx->priv_data;
1039
1040     free_buffers(s);
1041
1042     ff_free_vlc(&s->vlc_9);
1043     ff_free_vlc(&s->vlc_18);
1044
1045     return 0;
1046 }
1047
1048 AVCodec ff_cfhd_decoder = {
1049     .name             = "cfhd",
1050     .long_name        = NULL_IF_CONFIG_SMALL("Cineform HD"),
1051     .type             = AVMEDIA_TYPE_VIDEO,
1052     .id               = AV_CODEC_ID_CFHD,
1053     .priv_data_size   = sizeof(CFHDContext),
1054     .init             = cfhd_init,
1055     .close            = cfhd_close,
1056     .decode           = cfhd_decode,
1057     .capabilities     = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
1058     .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
1059 };