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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 enum CFHDParam {
  44     SampleType       =   1,
  45     SampleIndexTable =   2,
  46     BitstreamMarker  =   4,
  47     TransformType    =  10,
  48     ChannelCount     =  12,
  49     SubbandCount     =  14,
  50     ImageWidth       =  20,
  51     ImageHeight      =  21,
  52     LowpassWidth     =  27,
  53     LowpassHeight    =  28,
  54     LowpassPrecision =  35,
  55     HighpassWidth    =  41,
  56     HighpassHeight   =  42,
  57     SubbandNumber    =  48,
  58     Quantization     =  53,
  59     BandHeader       =  55,
  60     ChannelNumber    =  62,
  61     SampleFlags      =  68,
  62     EncodedFormat    =  84,
  63     BitsPerComponent = 101,
  64     ChannelWidth     = 104,
  65     ChannelHeight    = 105,
  66     PrescaleShift    = 109,
  67 };
  68
  69
  70
  71 static av_cold int cfhd_init(AVCodecContext *avctx)
  72 {
  73     CFHDContext *s = avctx->priv_data;
  74
  75     avctx->bits_per_raw_sample = 10;
  76     s->avctx                   = avctx;
  77
  78     return ff_cfhd_init_vlcs(s);
  79 }
  80
  81 static void init_plane_defaults(CFHDContext *s)
  82 {
  83     s->subband_num        = 0;
  84     s->level              = 0;
  85     s->subband_num_actual = 0;
  86 }
  87
  88 static void init_peak_table_defaults(CFHDContext *s)
  89 {
  90     s->peak.level  = 0;
  91     s->peak.offset = 0;
  92     memset(&s->peak.base, 0, sizeof(s->peak.base));
  93 }
  94
  95 static void init_frame_defaults(CFHDContext *s)
  96 {
  97     s->coded_width       = 0;
  98     s->coded_height      = 0;
  99     s->cropped_height    = 0;
 100     s->bpc               = 10;
 101     s->channel_cnt       = 4;
 102     s->subband_cnt       = SUBBAND_COUNT;
 103     s->channel_num       = 0;
 104     s->lowpass_precision = 16;
 105     s->quantisation      = 1;
 106     s->wavelet_depth     = 3;
 107     s->pshift            = 1;
 108     s->codebook          = 0;
 109     s->difference_coding = 0;
 110     s->progressive       = 0;
 111     init_plane_defaults(s);
 112     init_peak_table_defaults(s);
 113 }
 114
 115 /* TODO: merge with VLC tables or use LUT */
 116 static inline int dequant_and_decompand(int level, int quantisation, int codebook)
 117 {
 118     if (codebook == 0 || codebook == 1) {
 119         int64_t abslevel = abs(level);
 120         if (level < 264)
 121             return (abslevel + ((768 * abslevel * abslevel * abslevel) / (255 * 255 * 255))) *
 122                FFSIGN(level) * quantisation;
 123         else
 124             return level * quantisation;
 125     } else
 126         return level * quantisation;
 127 }
 128
 129 static inline void difference_coding(int16_t *band, int width, int height)
 130 {
 131
 132     int i,j;
 133     for (i = 0; i < height; i++) {
 134         for (j = 1; j < width; j++) {
 135           band[j] += band[j-1];
 136         }
 137         band += width;
 138     }
 139 }
 140
 141 static inline void peak_table(int16_t *band, Peak *peak, int length)
 142 {
 143     int i;
 144     for (i = 0; i < length; i++)
 145         if (abs(band[i]) > peak->level)
 146             band[i] = bytestream2_get_le16(&peak->base);
 147 }
 148
 149 static inline void process_alpha(int16_t *alpha, int width)
 150 {
 151     int i, channel;
 152     for (i = 0; i < width; i++) {
 153         channel   = alpha[i];
 154         channel  -= ALPHA_COMPAND_DC_OFFSET;
 155         channel <<= 3;
 156         channel  *= ALPHA_COMPAND_GAIN;
 157         channel >>= 16;
 158         channel   = av_clip_uintp2(channel, 12);
 159         alpha[i]  = channel;
 160     }
 161 }
 162
 163 static inline void process_bayer(AVFrame *frame)
 164 {
 165     const int linesize = frame->linesize[0];
 166     uint16_t *r = (uint16_t *)frame->data[0];
 167     uint16_t *g1 = (uint16_t *)(frame->data[0] + 2);
 168     uint16_t *g2 = (uint16_t *)(frame->data[0] + frame->linesize[0]);
 169     uint16_t *b = (uint16_t *)(frame->data[0] + frame->linesize[0] + 2);
 170     const int mid = 2048;
 171
 172     for (int y = 0; y < frame->height >> 1; y++) {
 173         for (int x = 0; x < frame->width; x += 2) {
 174             int R, G1, G2, B;
 175             int g, rg, bg, gd;
 176
 177             g  = r[x];
 178             rg = g1[x];
 179             bg = g2[x];
 180             gd = b[x];
 181             gd -= mid;
 182
 183             R  = (rg - mid) * 2 + g;
 184             G1 = g + gd;
 185             G2 = g - gd;
 186             B  = (bg - mid) * 2 + g;
 187
 188             R  = av_clip_uintp2(R  * 16, 16);
 189             G1 = av_clip_uintp2(G1 * 16, 16);
 190             G2 = av_clip_uintp2(G2 * 16, 16);
 191             B  = av_clip_uintp2(B  * 16, 16);
 192
 193             r[x]  = R;
 194             g1[x] = G1;
 195             g2[x] = G2;
 196             b[x]  = B;
 197         }
 198
 199         r  += linesize;
 200         g1 += linesize;
 201         g2 += linesize;
 202         b  += linesize;
 203     }
 204 }
 205
 206 static inline void filter(int16_t *output, ptrdiff_t out_stride,
 207                           int16_t *low, ptrdiff_t low_stride,
 208                           int16_t *high, ptrdiff_t high_stride,
 209                           int len, int clip)
 210 {
 211     int16_t tmp;
 212     int i;
 213
 214     tmp = (11*low[0*low_stride] - 4*low[1*low_stride] + low[2*low_stride] + 4) >> 3;
 215     output[(2*0+0)*out_stride] = (tmp + high[0*high_stride]) >> 1;
 216     if (clip)
 217         output[(2*0+0)*out_stride] = av_clip_uintp2_c(output[(2*0+0)*out_stride], clip);
 218
 219     tmp = ( 5*low[0*low_stride] + 4*low[1*low_stride] - low[2*low_stride] + 4) >> 3;
 220     output[(2*0+1)*out_stride] = (tmp - high[0*high_stride]) >> 1;
 221     if (clip)
 222         output[(2*0+1)*out_stride] = av_clip_uintp2_c(output[(2*0+1)*out_stride], clip);
 223
 224     for (i = 1; i < len - 1; i++) {
 225         tmp = (low[(i-1)*low_stride] - low[(i+1)*low_stride] + 4) >> 3;
 226         output[(2*i+0)*out_stride] = (tmp + low[i*low_stride] + high[i*high_stride]) >> 1;
 227         if (clip)
 228             output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
 229
 230         tmp = (low[(i+1)*low_stride] - low[(i-1)*low_stride] + 4) >> 3;
 231         output[(2*i+1)*out_stride] = (tmp + low[i*low_stride] - high[i*high_stride]) >> 1;
 232         if (clip)
 233             output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
 234     }
 235
 236     tmp = ( 5*low[i*low_stride] + 4*low[(i-1)*low_stride] - low[(i-2)*low_stride] + 4) >> 3;
 237     output[(2*i+0)*out_stride] = (tmp + high[i*high_stride]) >> 1;
 238     if (clip)
 239         output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
 240
 241     tmp = (11*low[i*low_stride] - 4*low[(i-1)*low_stride] + low[(i-2)*low_stride] + 4) >> 3;
 242     output[(2*i+1)*out_stride] = (tmp - high[i*high_stride]) >> 1;
 243     if (clip)
 244         output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
 245 }
 246
 247 static inline void interlaced_vertical_filter(int16_t *output, int16_t *low, int16_t *high,
 248                          int width, int linesize, int plane)
 249 {
 250     int i;
 251     int16_t even, odd;
 252     for (i = 0; i < width; i++) {
 253         even = (low[i] - high[i])/2;
 254         odd  = (low[i] + high[i])/2;
 255         output[i]            = av_clip_uintp2(even, 10);
 256         output[i + linesize] = av_clip_uintp2(odd, 10);
 257     }
 258 }
 259 static void horiz_filter(int16_t *output, int16_t *low, int16_t *high,
 260                          int width)
 261 {
 262     filter(output, 1, low, 1, high, 1, width, 0);
 263 }
 264
 265 static void horiz_filter_clip(int16_t *output, int16_t *low, int16_t *high,
 266                               int width, int clip)
 267 {
 268     filter(output, 1, low, 1, high, 1, width, clip);
 269 }
 270
 271 static void horiz_filter_clip_bayer(int16_t *output, int16_t *low, int16_t *high,
 272                                     int width, int clip)
 273 {
 274     filter(output, 2, low, 1, high, 1, width, clip);
 275 }
 276
 277 static void vert_filter(int16_t *output, ptrdiff_t out_stride,
 278                         int16_t *low, ptrdiff_t low_stride,
 279                         int16_t *high, ptrdiff_t high_stride, int len)
 280 {
 281     filter(output, out_stride, low, low_stride, high, high_stride, len, 0);
 282 }
 283
 284 static void free_buffers(CFHDContext *s)
 285 {
 286     int i, j;
 287
 288     for (i = 0; i < FF_ARRAY_ELEMS(s->plane); i++) {
 289         av_freep(&s->plane[i].idwt_buf);
 290         av_freep(&s->plane[i].idwt_tmp);
 291
 292         for (j = 0; j < 9; j++)
 293             s->plane[i].subband[j] = NULL;
 294
 295         for (j = 0; j < 8; j++)
 296             s->plane[i].l_h[j] = NULL;
 297     }
 298     s->a_height = 0;
 299     s->a_width  = 0;
 300 }
 301
 302 static int alloc_buffers(AVCodecContext *avctx)
 303 {
 304     CFHDContext *s = avctx->priv_data;
 305     int i, j, ret, planes;
 306     int chroma_x_shift, chroma_y_shift;
 307     unsigned k;
 308
 309     if (s->coded_format == AV_PIX_FMT_BAYER_RGGB16) {
 310         s->coded_width *= 2;
 311         s->coded_height *= 2;
 312     }
 313
 314     if ((ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height)) < 0)
 315         return ret;
 316     avctx->pix_fmt = s->coded_format;
 317
 318     if ((ret = av_pix_fmt_get_chroma_sub_sample(s->coded_format,
 319                                                 &chroma_x_shift,
 320                                                 &chroma_y_shift)) < 0)
 321         return ret;
 322     planes = av_pix_fmt_count_planes(s->coded_format);
 323     if (s->coded_format == AV_PIX_FMT_BAYER_RGGB16) {
 324         planes = 4;
 325         chroma_x_shift = 1;
 326         chroma_y_shift = 1;
 327     }
 328
 329     for (i = 0; i < planes; i++) {
 330         int w8, h8, w4, h4, w2, h2;
 331         int width  = i ? avctx->width  >> chroma_x_shift : avctx->width;
 332         int height = i ? avctx->height >> chroma_y_shift : avctx->height;
 333         ptrdiff_t stride = FFALIGN(width  / 8, 8) * 8;
 334         if (chroma_y_shift)
 335             height = FFALIGN(height / 8, 2) * 8;
 336         s->plane[i].width  = width;
 337         s->plane[i].height = height;
 338         s->plane[i].stride = stride;
 339
 340         w8 = FFALIGN(s->plane[i].width  / 8, 8);
 341         h8 = height / 8;
 342         w4 = w8 * 2;
 343         h4 = h8 * 2;
 344         w2 = w4 * 2;
 345         h2 = h4 * 2;
 346
 347         s->plane[i].idwt_buf =
 348             av_mallocz_array(height * stride, sizeof(*s->plane[i].idwt_buf));
 349         s->plane[i].idwt_tmp =
 350             av_malloc_array(height * stride, sizeof(*s->plane[i].idwt_tmp));
 351         if (!s->plane[i].idwt_buf || !s->plane[i].idwt_tmp)
 352             return AVERROR(ENOMEM);
 353
 354         s->plane[i].subband[0] = s->plane[i].idwt_buf;
 355         s->plane[i].subband[1] = s->plane[i].idwt_buf + 2 * w8 * h8;
 356         s->plane[i].subband[2] = s->plane[i].idwt_buf + 1 * w8 * h8;
 357         s->plane[i].subband[3] = s->plane[i].idwt_buf + 3 * w8 * h8;
 358         s->plane[i].subband[4] = s->plane[i].idwt_buf + 2 * w4 * h4;
 359         s->plane[i].subband[5] = s->plane[i].idwt_buf + 1 * w4 * h4;
 360         s->plane[i].subband[6] = s->plane[i].idwt_buf + 3 * w4 * h4;
 361         s->plane[i].subband[7] = s->plane[i].idwt_buf + 2 * w2 * h2;
 362         s->plane[i].subband[8] = s->plane[i].idwt_buf + 1 * w2 * h2;
 363         s->plane[i].subband[9] = s->plane[i].idwt_buf + 3 * w2 * h2;
 364
 365         for (j = 0; j < DWT_LEVELS; j++) {
 366             for (k = 0; k < FF_ARRAY_ELEMS(s->plane[i].band[j]); k++) {
 367                 s->plane[i].band[j][k].a_width  = w8 << j;
 368                 s->plane[i].band[j][k].a_height = h8 << j;
 369             }
 370         }
 371
 372         /* ll2 and ll1 commented out because they are done in-place */
 373         s->plane[i].l_h[0] = s->plane[i].idwt_tmp;
 374         s->plane[i].l_h[1] = s->plane[i].idwt_tmp + 2 * w8 * h8;
 375         // s->plane[i].l_h[2] = ll2;
 376         s->plane[i].l_h[3] = s->plane[i].idwt_tmp;
 377         s->plane[i].l_h[4] = s->plane[i].idwt_tmp + 2 * w4 * h4;
 378         // s->plane[i].l_h[5] = ll1;
 379         s->plane[i].l_h[6] = s->plane[i].idwt_tmp;
 380         s->plane[i].l_h[7] = s->plane[i].idwt_tmp + 2 * w2 * h2;
 381     }
 382
 383     s->a_height = s->coded_height;
 384     s->a_width  = s->coded_width;
 385     s->a_format = s->coded_format;
 386
 387     return 0;
 388 }
 389
 390 static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
 391                        AVPacket *avpkt)
 392 {
 393     CFHDContext *s = avctx->priv_data;
 394     GetByteContext gb;
 395     ThreadFrame frame = { .f = data };
 396     AVFrame *pic = data;
 397     int ret = 0, i, j, planes, plane, got_buffer = 0;
 398     int16_t *coeff_data;
 399
 400     s->coded_format = AV_PIX_FMT_YUV422P10;
 401     init_frame_defaults(s);
 402     planes = av_pix_fmt_count_planes(s->coded_format);
 403
 404     bytestream2_init(&gb, avpkt->data, avpkt->size);
 405
 406     while (bytestream2_get_bytes_left(&gb) > 4) {
 407         /* Bit weird but implement the tag parsing as the spec says */
 408         uint16_t tagu   = bytestream2_get_be16(&gb);
 409         int16_t tag     = (int16_t)tagu;
 410         int8_t tag8     = (int8_t)(tagu >> 8);
 411         uint16_t abstag = abs(tag);
 412         int8_t abs_tag8 = abs(tag8);
 413         uint16_t data   = bytestream2_get_be16(&gb);
 414         if (abs_tag8 >= 0x60 && abs_tag8 <= 0x6f) {
 415             av_log(avctx, AV_LOG_DEBUG, "large len %x\n", ((tagu & 0xff) << 16) | data);
 416         } else if (tag == SampleFlags) {
 417             av_log(avctx, AV_LOG_DEBUG, "Progressive?%"PRIu16"\n", data);
 418             s->progressive = data & 0x0001;
 419         } else if (tag == ImageWidth) {
 420             av_log(avctx, AV_LOG_DEBUG, "Width %"PRIu16"\n", data);
 421             s->coded_width = data;
 422         } else if (tag == ImageHeight) {
 423             av_log(avctx, AV_LOG_DEBUG, "Height %"PRIu16"\n", data);
 424             s->coded_height = data;
 425         } else if (tag == 101) {
 426             av_log(avctx, AV_LOG_DEBUG, "Bits per component: %"PRIu16"\n", data);
 427             if (data < 1 || data > 31) {
 428                 av_log(avctx, AV_LOG_ERROR, "Bits per component %d is invalid\n", data);
 429                 ret = AVERROR(EINVAL);
 430                 break;
 431             }
 432             s->bpc = data;
 433         } else if (tag == ChannelCount) {
 434             av_log(avctx, AV_LOG_DEBUG, "Channel Count: %"PRIu16"\n", data);
 435             s->channel_cnt = data;
 436             if (data > 4) {
 437                 av_log(avctx, AV_LOG_ERROR, "Channel Count of %"PRIu16" is unsupported\n", data);
 438                 ret = AVERROR_PATCHWELCOME;
 439                 break;
 440             }
 441         } else if (tag == SubbandCount) {
 442             av_log(avctx, AV_LOG_DEBUG, "Subband Count: %"PRIu16"\n", data);
 443             if (data != SUBBAND_COUNT) {
 444                 av_log(avctx, AV_LOG_ERROR, "Subband Count of %"PRIu16" is unsupported\n", data);
 445                 ret = AVERROR_PATCHWELCOME;
 446                 break;
 447             }
 448         } else if (tag == ChannelNumber) {
 449             s->channel_num = data;
 450             av_log(avctx, AV_LOG_DEBUG, "Channel number %"PRIu16"\n", data);
 451             if (s->channel_num >= planes) {
 452                 av_log(avctx, AV_LOG_ERROR, "Invalid channel number\n");
 453                 ret = AVERROR(EINVAL);
 454                 break;
 455             }
 456             init_plane_defaults(s);
 457         } else if (tag == SubbandNumber) {
 458             if (s->subband_num != 0 && data == 1)  // hack
 459                 s->level++;
 460             av_log(avctx, AV_LOG_DEBUG, "Subband number %"PRIu16"\n", data);
 461             s->subband_num = data;
 462             if (s->level >= DWT_LEVELS) {
 463                 av_log(avctx, AV_LOG_ERROR, "Invalid level\n");
 464                 ret = AVERROR(EINVAL);
 465                 break;
 466             }
 467             if (s->subband_num > 3) {
 468                 av_log(avctx, AV_LOG_ERROR, "Invalid subband number\n");
 469                 ret = AVERROR(EINVAL);
 470                 break;
 471             }
 472         } else if (tag == 51) {
 473             av_log(avctx, AV_LOG_DEBUG, "Subband number actual %"PRIu16"\n", data);
 474             s->subband_num_actual = data;
 475             if (s->subband_num_actual >= 10) {
 476                 av_log(avctx, AV_LOG_ERROR, "Invalid subband number actual\n");
 477                 ret = AVERROR(EINVAL);
 478                 break;
 479             }
 480         } else if (tag == LowpassPrecision)
 481             av_log(avctx, AV_LOG_DEBUG, "Lowpass precision bits: %"PRIu16"\n", data);
 482         else if (tag == Quantization) {
 483             s->quantisation = data;
 484             av_log(avctx, AV_LOG_DEBUG, "Quantisation: %"PRIu16"\n", data);
 485         } else if (tag == PrescaleShift) {
 486             s->prescale_shift[0] = (data >> 0) & 0x7;
 487             s->prescale_shift[1] = (data >> 3) & 0x7;
 488             s->prescale_shift[2] = (data >> 6) & 0x7;
 489             av_log(avctx, AV_LOG_DEBUG, "Prescale shift (VC-5): %x\n", data);
 490         } else if (tag == LowpassWidth) {
 491             av_log(avctx, AV_LOG_DEBUG, "Lowpass width %"PRIu16"\n", data);
 492             if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_width) {
 493                 av_log(avctx, AV_LOG_ERROR, "Invalid lowpass width\n");
 494                 ret = AVERROR(EINVAL);
 495                 break;
 496             }
 497             s->plane[s->channel_num].band[0][0].width  = data;
 498             s->plane[s->channel_num].band[0][0].stride = data;
 499         } else if (tag == LowpassHeight) {
 500             av_log(avctx, AV_LOG_DEBUG, "Lowpass height %"PRIu16"\n", data);
 501             if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_height) {
 502                 av_log(avctx, AV_LOG_ERROR, "Invalid lowpass height\n");
 503                 ret = AVERROR(EINVAL);
 504                 break;
 505             }
 506             s->plane[s->channel_num].band[0][0].height = data;
 507         } else if (tag == SampleType)
 508             av_log(avctx, AV_LOG_DEBUG, "Sample type? %"PRIu16"\n", data);
 509         else if (tag == TransformType) {
 510             if (data != 0) {
 511                 avpriv_report_missing_feature(avctx, "Transform type of %"PRIu16, data);
 512                 ret = AVERROR_PATCHWELCOME;
 513                 break;
 514             }
 515             av_log(avctx, AV_LOG_DEBUG, "Transform-type? %"PRIu16"\n", data);
 516         } else if (abstag >= 0x4000 && abstag <= 0x40ff) {
 517             if (abstag == 0x4001)
 518                 s->peak.level = 0;
 519             av_log(avctx, AV_LOG_DEBUG, "Small chunk length %d %s\n", data * 4, tag < 0 ? "optional" : "required");
 520             bytestream2_skipu(&gb, data * 4);
 521         } else if (tag == 23) {
 522             av_log(avctx, AV_LOG_DEBUG, "Skip frame\n");
 523             avpriv_report_missing_feature(avctx, "Skip frame");
 524             ret = AVERROR_PATCHWELCOME;
 525             break;
 526         } else if (tag == SampleIndexTable) {
 527             av_log(avctx, AV_LOG_DEBUG, "tag=2 header - skipping %i tag/value pairs\n", data);
 528             if (data > bytestream2_get_bytes_left(&gb) / 4) {
 529                 av_log(avctx, AV_LOG_ERROR, "too many tag/value pairs (%d)\n", data);
 530                 ret = AVERROR_INVALIDDATA;
 531                 break;
 532             }
 533             for (i = 0; i < data; i++) {
 534                 uint16_t tag2 = bytestream2_get_be16(&gb);
 535                 uint16_t val2 = bytestream2_get_be16(&gb);
 536                 av_log(avctx, AV_LOG_DEBUG, "Tag/Value = %x %x\n", tag2, val2);
 537             }
 538         } else if (tag == HighpassWidth) {
 539             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);
 540             if (data < 3) {
 541                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass width\n");
 542                 ret = AVERROR(EINVAL);
 543                 break;
 544             }
 545             s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;
 546             s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
 547         } else if (tag == HighpassHeight) {
 548             av_log(avctx, AV_LOG_DEBUG, "Highpass height %i\n", data);
 549             if (data < 3) {
 550                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass height\n");
 551                 ret = AVERROR(EINVAL);
 552                 break;
 553             }
 554             s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
 555         } else if (tag == 49) {
 556             av_log(avctx, AV_LOG_DEBUG, "Highpass width2 %i\n", data);
 557             if (data < 3) {
 558                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass width2\n");
 559                 ret = AVERROR(EINVAL);
 560                 break;
 561             }
 562             s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;
 563             s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
 564         } else if (tag == 50) {
 565             av_log(avctx, AV_LOG_DEBUG, "Highpass height2 %i\n", data);
 566             if (data < 3) {
 567                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass height2\n");
 568                 ret = AVERROR(EINVAL);
 569                 break;
 570             }
 571             s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
 572         } else if (tag == 71) {
 573             s->codebook = data;
 574             av_log(avctx, AV_LOG_DEBUG, "Codebook %i\n", s->codebook);
 575         } else if (tag == 72) {
 576             s->codebook = data & 0xf;
 577             s->difference_coding = (data >> 4) & 1;
 578             av_log(avctx, AV_LOG_DEBUG, "Other codebook? %i\n", s->codebook);
 579         } else if (tag == 70) {
 580             av_log(avctx, AV_LOG_DEBUG, "Subsampling or bit-depth flag? %i\n", data);
 581             if (!(data == 10 || data == 12)) {
 582                 av_log(avctx, AV_LOG_ERROR, "Invalid bits per channel\n");
 583                 ret = AVERROR(EINVAL);
 584                 break;
 585             }
 586             s->bpc = data;
 587         } else if (tag == EncodedFormat) {
 588             av_log(avctx, AV_LOG_DEBUG, "Sample format? %i\n", data);
 589             if (data == 1) {
 590                 s->coded_format = AV_PIX_FMT_YUV422P10;
 591             } else if (data == 2) {
 592                 s->coded_format = AV_PIX_FMT_BAYER_RGGB16;
 593             } else if (data == 3) {
 594                 s->coded_format = AV_PIX_FMT_GBRP12;
 595             } else if (data == 4) {
 596                 s->coded_format = AV_PIX_FMT_GBRAP12;
 597             } else {
 598                 avpriv_report_missing_feature(avctx, "Sample format of %"PRIu16, data);
 599                 ret = AVERROR_PATCHWELCOME;
 600                 break;
 601             }
 602             planes = data == 2 ? 4 : av_pix_fmt_count_planes(s->coded_format);
 603         } else if (tag == -85) {
 604             av_log(avctx, AV_LOG_DEBUG, "Cropped height %"PRIu16"\n", data);
 605             s->cropped_height = data;
 606         } else if (tag == -75) {
 607             s->peak.offset &= ~0xffff;
 608             s->peak.offset |= (data & 0xffff);
 609             s->peak.base    = gb;
 610             s->peak.level   = 0;
 611         } else if (tag == -76) {
 612             s->peak.offset &= 0xffff;
 613             s->peak.offset |= (data & 0xffffU)<<16;
 614             s->peak.base    = gb;
 615             s->peak.level   = 0;
 616         } else if (tag == -74 && s->peak.offset) {
 617             s->peak.level = data;
 618             bytestream2_seek(&s->peak.base, s->peak.offset - 4, SEEK_CUR);
 619         } else
 620             av_log(avctx, AV_LOG_DEBUG,  "Unknown tag %i data %x\n", tag, data);
 621
 622         /* Some kind of end of header tag */
 623         if (tag == BitstreamMarker && data == 0x1a4a && s->coded_width && s->coded_height &&
 624             s->coded_format != AV_PIX_FMT_NONE) {
 625             if (s->a_width != s->coded_width || s->a_height != s->coded_height ||
 626                 s->a_format != s->coded_format) {
 627                 free_buffers(s);
 628                 if ((ret = alloc_buffers(avctx)) < 0) {
 629                     free_buffers(s);
 630                     return ret;
 631                 }
 632             }
 633             ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height);
 634             if (ret < 0)
 635                 return ret;
 636             if (s->cropped_height) {
 637                 unsigned height = s->cropped_height << (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16);
 638                 if (avctx->height < height)
 639                     return AVERROR_INVALIDDATA;
 640                 avctx->height = height;
 641             }
 642             frame.f->width =
 643             frame.f->height = 0;
 644
 645             if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
 646                 return ret;
 647
 648             s->coded_width = 0;
 649             s->coded_height = 0;
 650             s->coded_format = AV_PIX_FMT_NONE;
 651             got_buffer = 1;
 652         }
 653         coeff_data = s->plane[s->channel_num].subband[s->subband_num_actual];
 654
 655         /* Lowpass coefficients */
 656         if (tag == BitstreamMarker && data == 0xf0f && s->a_width && s->a_height) {
 657             int lowpass_height = s->plane[s->channel_num].band[0][0].height;
 658             int lowpass_width  = s->plane[s->channel_num].band[0][0].width;
 659             int lowpass_a_height = s->plane[s->channel_num].band[0][0].a_height;
 660             int lowpass_a_width  = s->plane[s->channel_num].band[0][0].a_width;
 661
 662             if (!got_buffer) {
 663                 av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 664                 ret = AVERROR(EINVAL);
 665                 goto end;
 666             }
 667
 668             if (lowpass_height > lowpass_a_height || lowpass_width > lowpass_a_width ||
 669                 lowpass_a_width * lowpass_a_height * sizeof(int16_t) > bytestream2_get_bytes_left(&gb)) {
 670                 av_log(avctx, AV_LOG_ERROR, "Too many lowpass coefficients\n");
 671                 ret = AVERROR(EINVAL);
 672                 goto end;
 673             }
 674
 675             av_log(avctx, AV_LOG_DEBUG, "Start of lowpass coeffs component %d height:%d, width:%d\n", s->channel_num, lowpass_height, lowpass_width);
 676             for (i = 0; i < lowpass_height; i++) {
 677                 for (j = 0; j < lowpass_width; j++)
 678                     coeff_data[j] = bytestream2_get_be16u(&gb);
 679
 680                 coeff_data += lowpass_width;
 681             }
 682
 683             /* Align to mod-4 position to continue reading tags */
 684             bytestream2_seek(&gb, bytestream2_tell(&gb) & 3, SEEK_CUR);
 685
 686             /* Copy last line of coefficients if odd height */
 687             if (lowpass_height & 1) {
 688                 memcpy(&coeff_data[lowpass_height * lowpass_width],
 689                        &coeff_data[(lowpass_height - 1) * lowpass_width],
 690                        lowpass_width * sizeof(*coeff_data));
 691             }
 692
 693             av_log(avctx, AV_LOG_DEBUG, "Lowpass coefficients %d\n", lowpass_width * lowpass_height);
 694         }
 695
 696         if (tag == BandHeader && s->subband_num_actual != 255 && s->a_width && s->a_height) {
 697             int highpass_height = s->plane[s->channel_num].band[s->level][s->subband_num].height;
 698             int highpass_width  = s->plane[s->channel_num].band[s->level][s->subband_num].width;
 699             int highpass_a_width = s->plane[s->channel_num].band[s->level][s->subband_num].a_width;
 700             int highpass_a_height = s->plane[s->channel_num].band[s->level][s->subband_num].a_height;
 701             int highpass_stride = s->plane[s->channel_num].band[s->level][s->subband_num].stride;
 702             int expected;
 703             int a_expected = highpass_a_height * highpass_a_width;
 704             int level, run, coeff;
 705             int count = 0, bytes;
 706
 707             if (!got_buffer) {
 708                 av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 709                 ret = AVERROR(EINVAL);
 710                 goto end;
 711             }
 712
 713             if (highpass_height > highpass_a_height || highpass_width > highpass_a_width || a_expected < highpass_height * (uint64_t)highpass_stride) {
 714                 av_log(avctx, AV_LOG_ERROR, "Too many highpass coefficients\n");
 715                 ret = AVERROR(EINVAL);
 716                 goto end;
 717             }
 718             expected = highpass_height * highpass_stride;
 719
 720             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);
 721
 722             init_get_bits(&s->gb, gb.buffer, bytestream2_get_bytes_left(&gb) * 8);
 723             {
 724                 OPEN_READER(re, &s->gb);
 725                 if (!s->codebook) {
 726                     while (1) {
 727                         UPDATE_CACHE(re, &s->gb);
 728                         GET_RL_VLC(level, run, re, &s->gb, s->table_9_rl_vlc,
 729                                    VLC_BITS, 3, 1);
 730
 731                         /* escape */
 732                         if (level == 64)
 733                             break;
 734
 735                         count += run;
 736
 737                         if (count > expected)
 738                             break;
 739
 740                         coeff = dequant_and_decompand(level, s->quantisation, 0);
 741                         for (i = 0; i < run; i++)
 742                             *coeff_data++ = coeff;
 743                     }
 744                 } else {
 745                     while (1) {
 746                         UPDATE_CACHE(re, &s->gb);
 747                         GET_RL_VLC(level, run, re, &s->gb, s->table_18_rl_vlc,
 748                                    VLC_BITS, 3, 1);
 749
 750                         /* escape */
 751                         if (level == 255 && run == 2)
 752                             break;
 753
 754                         count += run;
 755
 756                         if (count > expected)
 757                             break;
 758
 759                         coeff = dequant_and_decompand(level, s->quantisation, s->codebook);
 760                         for (i = 0; i < run; i++)
 761                             *coeff_data++ = coeff;
 762                     }
 763                 }
 764                 CLOSE_READER(re, &s->gb);
 765             }
 766
 767             if (count > expected) {
 768                 av_log(avctx, AV_LOG_ERROR, "Escape codeword not found, probably corrupt data\n");
 769                 ret = AVERROR(EINVAL);
 770                 goto end;
 771             }
 772             if (s->peak.level)
 773                 peak_table(coeff_data - count, &s->peak, count);
 774             if (s->difference_coding)
 775                 difference_coding(s->plane[s->channel_num].subband[s->subband_num_actual], highpass_width, highpass_height);
 776
 777             bytes = FFALIGN(AV_CEIL_RSHIFT(get_bits_count(&s->gb), 3), 4);
 778             if (bytes > bytestream2_get_bytes_left(&gb)) {
 779                 av_log(avctx, AV_LOG_ERROR, "Bitstream overread error\n");
 780                 ret = AVERROR(EINVAL);
 781                 goto end;
 782             } else
 783                 bytestream2_seek(&gb, bytes, SEEK_CUR);
 784
 785             av_log(avctx, AV_LOG_DEBUG, "End subband coeffs %i extra %i\n", count, count - expected);
 786             s->codebook = 0;
 787
 788             /* Copy last line of coefficients if odd height */
 789             if (highpass_height & 1) {
 790                 memcpy(&coeff_data[highpass_height * highpass_stride],
 791                        &coeff_data[(highpass_height - 1) * highpass_stride],
 792                        highpass_stride * sizeof(*coeff_data));
 793             }
 794         }
 795     }
 796
 797     if (!s->a_width || !s->a_height || s->a_format == AV_PIX_FMT_NONE ||
 798         s->coded_width || s->coded_height || s->coded_format != AV_PIX_FMT_NONE) {
 799         av_log(avctx, AV_LOG_ERROR, "Invalid dimensions\n");
 800         ret = AVERROR(EINVAL);
 801         goto end;
 802     }
 803
 804     if (!got_buffer) {
 805         av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 806         ret = AVERROR(EINVAL);
 807         goto end;
 808     }
 809
 810     planes = av_pix_fmt_count_planes(avctx->pix_fmt);
 811     if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16) {
 812         if (!s->progressive)
 813             return AVERROR_INVALIDDATA;
 814         planes = 4;
 815     }
 816
 817     for (plane = 0; plane < planes && !ret; plane++) {
 818         /* level 1 */
 819         int lowpass_height  = s->plane[plane].band[0][0].height;
 820         int lowpass_width   = s->plane[plane].band[0][0].width;
 821         int highpass_stride = s->plane[plane].band[0][1].stride;
 822         int act_plane = plane == 1 ? 2 : plane == 2 ? 1 : plane;
 823         ptrdiff_t dst_linesize;
 824         int16_t *low, *high, *output, *dst;
 825
 826         if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16) {
 827             act_plane = 0;
 828             dst_linesize = pic->linesize[act_plane];
 829         } else {
 830             dst_linesize = pic->linesize[act_plane] / 2;
 831         }
 832
 833         if (lowpass_height > s->plane[plane].band[0][0].a_height || lowpass_width > s->plane[plane].band[0][0].a_width ||
 834             !highpass_stride || s->plane[plane].band[0][1].width > s->plane[plane].band[0][1].a_width) {
 835             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 836             ret = AVERROR(EINVAL);
 837             goto end;
 838         }
 839
 840         av_log(avctx, AV_LOG_DEBUG, "Decoding level 1 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 841
 842         low    = s->plane[plane].subband[0];
 843         high   = s->plane[plane].subband[2];
 844         output = s->plane[plane].l_h[0];
 845         for (i = 0; i < lowpass_width; i++) {
 846             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 847             low++;
 848             high++;
 849             output++;
 850         }
 851
 852         low    = s->plane[plane].subband[1];
 853         high   = s->plane[plane].subband[3];
 854         output = s->plane[plane].l_h[1];
 855
 856         for (i = 0; i < lowpass_width; i++) {
 857             // note the stride of "low" is highpass_stride
 858             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 859             low++;
 860             high++;
 861             output++;
 862         }
 863
 864         low    = s->plane[plane].l_h[0];
 865         high   = s->plane[plane].l_h[1];
 866         output = s->plane[plane].subband[0];
 867         for (i = 0; i < lowpass_height * 2; i++) {
 868             horiz_filter(output, low, high, lowpass_width);
 869             low    += lowpass_width;
 870             high   += lowpass_width;
 871             output += lowpass_width * 2;
 872         }
 873         if (s->bpc == 12) {
 874             output = s->plane[plane].subband[0];
 875             for (i = 0; i < lowpass_height * 2; i++) {
 876                 for (j = 0; j < lowpass_width * 2; j++)
 877                     output[j] *= 4;
 878
 879                 output += lowpass_width * 2;
 880             }
 881         }
 882
 883         /* level 2 */
 884         lowpass_height  = s->plane[plane].band[1][1].height;
 885         lowpass_width   = s->plane[plane].band[1][1].width;
 886         highpass_stride = s->plane[plane].band[1][1].stride;
 887
 888         if (lowpass_height > s->plane[plane].band[1][1].a_height || lowpass_width > s->plane[plane].band[1][1].a_width ||
 889             !highpass_stride || s->plane[plane].band[1][1].width > s->plane[plane].band[1][1].a_width) {
 890             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 891             ret = AVERROR(EINVAL);
 892             goto end;
 893         }
 894
 895         av_log(avctx, AV_LOG_DEBUG, "Level 2 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 896
 897         low    = s->plane[plane].subband[0];
 898         high   = s->plane[plane].subband[5];
 899         output = s->plane[plane].l_h[3];
 900         for (i = 0; i < lowpass_width; i++) {
 901             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 902             low++;
 903             high++;
 904             output++;
 905         }
 906
 907         low    = s->plane[plane].subband[4];
 908         high   = s->plane[plane].subband[6];
 909         output = s->plane[plane].l_h[4];
 910         for (i = 0; i < lowpass_width; i++) {
 911             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 912             low++;
 913             high++;
 914             output++;
 915         }
 916
 917         low    = s->plane[plane].l_h[3];
 918         high   = s->plane[plane].l_h[4];
 919         output = s->plane[plane].subband[0];
 920         for (i = 0; i < lowpass_height * 2; i++) {
 921             horiz_filter(output, low, high, lowpass_width);
 922             low    += lowpass_width;
 923             high   += lowpass_width;
 924             output += lowpass_width * 2;
 925         }
 926
 927         output = s->plane[plane].subband[0];
 928         for (i = 0; i < lowpass_height * 2; i++) {
 929             for (j = 0; j < lowpass_width * 2; j++)
 930                 output[j] *= 4;
 931
 932             output += lowpass_width * 2;
 933         }
 934
 935         /* level 3 */
 936         lowpass_height  = s->plane[plane].band[2][1].height;
 937         lowpass_width   = s->plane[plane].band[2][1].width;
 938         highpass_stride = s->plane[plane].band[2][1].stride;
 939
 940         if (lowpass_height > s->plane[plane].band[2][1].a_height || lowpass_width > s->plane[plane].band[2][1].a_width ||
 941             !highpass_stride || s->plane[plane].band[2][1].width > s->plane[plane].band[2][1].a_width) {
 942             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 943             ret = AVERROR(EINVAL);
 944             goto end;
 945         }
 946
 947         av_log(avctx, AV_LOG_DEBUG, "Level 3 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 948         if (s->progressive) {
 949             low    = s->plane[plane].subband[0];
 950             high   = s->plane[plane].subband[8];
 951             output = s->plane[plane].l_h[6];
 952             for (i = 0; i < lowpass_width; i++) {
 953                 vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 954                 low++;
 955                 high++;
 956                 output++;
 957             }
 958
 959             low    = s->plane[plane].subband[7];
 960             high   = s->plane[plane].subband[9];
 961             output = s->plane[plane].l_h[7];
 962             for (i = 0; i < lowpass_width; i++) {
 963                 vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 964                 low++;
 965                 high++;
 966                 output++;
 967             }
 968
 969             dst = (int16_t *)pic->data[act_plane];
 970             if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16) {
 971                 if (plane & 1)
 972                     dst++;
 973                 if (plane > 1)
 974                     dst += pic->linesize[act_plane] >> 1;
 975             }
 976             low  = s->plane[plane].l_h[6];
 977             high = s->plane[plane].l_h[7];
 978
 979             if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16 &&
 980                 (lowpass_height * 2 > avctx->coded_height / 2 ||
 981                  lowpass_width  * 2 > avctx->coded_width  / 2    )
 982                 ) {
 983                 ret = AVERROR_INVALIDDATA;
 984                 goto end;
 985             }
 986
 987             for (i = 0; i < lowpass_height * 2; i++) {
 988                 if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16)
 989                     horiz_filter_clip_bayer(dst, low, high, lowpass_width, s->bpc);
 990                 else
 991                     horiz_filter_clip(dst, low, high, lowpass_width, s->bpc);
 992                 if (avctx->pix_fmt == AV_PIX_FMT_GBRAP12 && act_plane == 3)
 993                     process_alpha(dst, lowpass_width * 2);
 994                 low  += lowpass_width;
 995                 high += lowpass_width;
 996                 dst  += dst_linesize;
 997             }
 998         } else {
 999             av_log(avctx, AV_LOG_DEBUG, "interlaced frame ? %d", pic->interlaced_frame);
1000             pic->interlaced_frame = 1;
1001             low    = s->plane[plane].subband[0];
1002             high   = s->plane[plane].subband[7];
1003             output = s->plane[plane].l_h[6];
1004             for (i = 0; i < lowpass_height; i++) {
1005                 horiz_filter(output, low, high, lowpass_width);
1006                 low    += lowpass_width;
1007                 high   += lowpass_width;
1008                 output += lowpass_width * 2;
1009             }
1010
1011             low    = s->plane[plane].subband[8];
1012             high   = s->plane[plane].subband[9];
1013             output = s->plane[plane].l_h[7];
1014             for (i = 0; i < lowpass_height; i++) {
1015                 horiz_filter(output, low, high, lowpass_width);
1016                 low    += lowpass_width;
1017                 high   += lowpass_width;
1018                 output += lowpass_width * 2;
1019             }
1020
1021             dst  = (int16_t *)pic->data[act_plane];
1022             low  = s->plane[plane].l_h[6];
1023             high = s->plane[plane].l_h[7];
1024             for (i = 0; i < lowpass_height; i++) {
1025                 interlaced_vertical_filter(dst, low, high, lowpass_width * 2,  pic->linesize[act_plane]/2, act_plane);
1026                 low  += lowpass_width * 2;
1027                 high += lowpass_width * 2;
1028                 dst  += pic->linesize[act_plane];
1029             }
1030         }
1031     }
1032
1033
1034     if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16)
1035         process_bayer(pic);
1036 end:
1037     if (ret < 0)
1038         return ret;
1039
1040     *got_frame = 1;
1041     return avpkt->size;
1042 }
1043
1044 static av_cold int cfhd_close(AVCodecContext *avctx)
1045 {
1046     CFHDContext *s = avctx->priv_data;
1047
1048     free_buffers(s);
1049
1050     ff_free_vlc(&s->vlc_9);
1051     ff_free_vlc(&s->vlc_18);
1052
1053     return 0;
1054 }
1055
1056 AVCodec ff_cfhd_decoder = {
1057     .name             = "cfhd",
1058     .long_name        = NULL_IF_CONFIG_SMALL("Cineform HD"),
1059     .type             = AVMEDIA_TYPE_VIDEO,
1060     .id               = AV_CODEC_ID_CFHD,
1061     .priv_data_size   = sizeof(CFHDContext),
1062     .init             = cfhd_init,
1063     .close            = cfhd_close,
1064     .decode           = cfhd_decode,
1065     .capabilities     = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
1066     .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
1067 };