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

   1 /*
   2  * Copyright (c) 2015-2016 Kieran Kunhya <kieran@kunhya.com>
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 /**
  22  * @file
  23  * Cineform HD video decoder
  24  */
  25
  26 #include "libavutil/attributes.h"
  27 #include "libavutil/buffer.h"
  28 #include "libavutil/common.h"
  29 #include "libavutil/imgutils.h"
  30 #include "libavutil/intreadwrite.h"
  31 #include "libavutil/opt.h"
  32
  33 #include "avcodec.h"
  34 #include "bytestream.h"
  35 #include "get_bits.h"
  36 #include "internal.h"
  37 #include "thread.h"
  38 #include "cfhd.h"
  39
  40 #define ALPHA_COMPAND_DC_OFFSET 256
  41 #define ALPHA_COMPAND_GAIN 9400
  42
  43 static av_cold int cfhd_init(AVCodecContext *avctx)
  44 {
  45     CFHDContext *s = avctx->priv_data;
  46
  47     avctx->bits_per_raw_sample = 10;
  48     s->avctx                   = avctx;
  49
  50     return ff_cfhd_init_vlcs(s);
  51 }
  52
  53 static void init_plane_defaults(CFHDContext *s)
  54 {
  55     s->subband_num        = 0;
  56     s->level              = 0;
  57     s->subband_num_actual = 0;
  58 }
  59
  60 static void init_peak_table_defaults(CFHDContext *s)
  61 {
  62     s->peak.level  = 0;
  63     s->peak.offset = 0;
  64     memset(&s->peak.base, 0, sizeof(s->peak.base));
  65 }
  66
  67 static void init_frame_defaults(CFHDContext *s)
  68 {
  69     s->coded_width       = 0;
  70     s->coded_height      = 0;
  71     s->cropped_height    = 0;
  72     s->bpc               = 10;
  73     s->channel_cnt       = 4;
  74     s->subband_cnt       = SUBBAND_COUNT;
  75     s->channel_num       = 0;
  76     s->lowpass_precision = 16;
  77     s->quantisation      = 1;
  78     s->wavelet_depth     = 3;
  79     s->pshift            = 1;
  80     s->codebook          = 0;
  81     s->difference_coding = 0;
  82     s->progressive       = 0;
  83     init_plane_defaults(s);
  84     init_peak_table_defaults(s);
  85 }
  86
  87 /* TODO: merge with VLC tables or use LUT */
  88 static inline int dequant_and_decompand(int level, int quantisation, int codebook)
  89 {
  90     if (codebook == 0 || codebook == 1) {
  91         int64_t abslevel = abs(level);
  92         if (abslevel < 256)
  93             return (abslevel + ((768 * abslevel * abslevel * abslevel) / (256 * 256 * 256))) *
  94                FFSIGN(level) * quantisation;
  95         else
  96             return level * quantisation;
  97     } else
  98         return level * quantisation;
  99 }
 100
 101 static inline void difference_coding(int16_t *band, int width, int height)
 102 {
 103
 104     int i,j;
 105     for (i = 0; i < height; i++) {
 106         for (j = 1; j < width; j++) {
 107           band[j] += band[j-1];
 108         }
 109         band += width;
 110     }
 111 }
 112
 113 static inline void peak_table(int16_t *band, Peak *peak, int length)
 114 {
 115     int i;
 116     for (i = 0; i < length; i++)
 117         if (abs(band[i]) > peak->level)
 118             band[i] = bytestream2_get_le16(&peak->base);
 119 }
 120
 121 static inline void process_alpha(int16_t *alpha, int width)
 122 {
 123     int i, channel;
 124     for (i = 0; i < width; i++) {
 125         channel   = alpha[i];
 126         channel  -= ALPHA_COMPAND_DC_OFFSET;
 127         channel <<= 3;
 128         channel  *= ALPHA_COMPAND_GAIN;
 129         channel >>= 16;
 130         channel   = av_clip_uintp2(channel, 12);
 131         alpha[i]  = channel;
 132     }
 133 }
 134
 135 static inline void process_bayer(AVFrame *frame)
 136 {
 137     const int linesize = frame->linesize[0];
 138     uint16_t *r = (uint16_t *)frame->data[0];
 139     uint16_t *g1 = (uint16_t *)(frame->data[0] + 2);
 140     uint16_t *g2 = (uint16_t *)(frame->data[0] + frame->linesize[0]);
 141     uint16_t *b = (uint16_t *)(frame->data[0] + frame->linesize[0] + 2);
 142     const int mid = 2048;
 143
 144     for (int y = 0; y < frame->height >> 1; y++) {
 145         for (int x = 0; x < frame->width; x += 2) {
 146             int R, G1, G2, B;
 147             int g, rg, bg, gd;
 148
 149             g  = r[x];
 150             rg = g1[x];
 151             bg = g2[x];
 152             gd = b[x];
 153             gd -= mid;
 154
 155             R  = (rg - mid) * 2 + g;
 156             G1 = g + gd;
 157             G2 = g - gd;
 158             B  = (bg - mid) * 2 + g;
 159
 160             R  = av_clip_uintp2(R  * 16, 16);
 161             G1 = av_clip_uintp2(G1 * 16, 16);
 162             G2 = av_clip_uintp2(G2 * 16, 16);
 163             B  = av_clip_uintp2(B  * 16, 16);
 164
 165             r[x]  = R;
 166             g1[x] = G1;
 167             g2[x] = G2;
 168             b[x]  = B;
 169         }
 170
 171         r  += linesize;
 172         g1 += linesize;
 173         g2 += linesize;
 174         b  += linesize;
 175     }
 176 }
 177
 178 static inline void filter(int16_t *output, ptrdiff_t out_stride,
 179                           int16_t *low, ptrdiff_t low_stride,
 180                           int16_t *high, ptrdiff_t high_stride,
 181                           int len, int clip)
 182 {
 183     int16_t tmp;
 184     int i;
 185
 186     tmp = (11*low[0*low_stride] - 4*low[1*low_stride] + low[2*low_stride] + 4) >> 3;
 187     output[(2*0+0)*out_stride] = (tmp + high[0*high_stride]) >> 1;
 188     if (clip)
 189         output[(2*0+0)*out_stride] = av_clip_uintp2_c(output[(2*0+0)*out_stride], clip);
 190
 191     tmp = ( 5*low[0*low_stride] + 4*low[1*low_stride] - low[2*low_stride] + 4) >> 3;
 192     output[(2*0+1)*out_stride] = (tmp - high[0*high_stride]) >> 1;
 193     if (clip)
 194         output[(2*0+1)*out_stride] = av_clip_uintp2_c(output[(2*0+1)*out_stride], clip);
 195
 196     for (i = 1; i < len - 1; i++) {
 197         tmp = (low[(i-1)*low_stride] - low[(i+1)*low_stride] + 4) >> 3;
 198         output[(2*i+0)*out_stride] = (tmp + low[i*low_stride] + high[i*high_stride]) >> 1;
 199         if (clip)
 200             output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
 201
 202         tmp = (low[(i+1)*low_stride] - low[(i-1)*low_stride] + 4) >> 3;
 203         output[(2*i+1)*out_stride] = (tmp + low[i*low_stride] - high[i*high_stride]) >> 1;
 204         if (clip)
 205             output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
 206     }
 207
 208     tmp = ( 5*low[i*low_stride] + 4*low[(i-1)*low_stride] - low[(i-2)*low_stride] + 4) >> 3;
 209     output[(2*i+0)*out_stride] = (tmp + high[i*high_stride]) >> 1;
 210     if (clip)
 211         output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);
 212
 213     tmp = (11*low[i*low_stride] - 4*low[(i-1)*low_stride] + low[(i-2)*low_stride] + 4) >> 3;
 214     output[(2*i+1)*out_stride] = (tmp - high[i*high_stride]) >> 1;
 215     if (clip)
 216         output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
 217 }
 218
 219 static inline void interlaced_vertical_filter(int16_t *output, int16_t *low, int16_t *high,
 220                          int width, int linesize, int plane)
 221 {
 222     int i;
 223     int16_t even, odd;
 224     for (i = 0; i < width; i++) {
 225         even = (low[i] - high[i])/2;
 226         odd  = (low[i] + high[i])/2;
 227         output[i]            = av_clip_uintp2(even, 10);
 228         output[i + linesize] = av_clip_uintp2(odd, 10);
 229     }
 230 }
 231 static void horiz_filter(int16_t *output, int16_t *low, int16_t *high,
 232                          int width)
 233 {
 234     filter(output, 1, low, 1, high, 1, width, 0);
 235 }
 236
 237 static void horiz_filter_clip(int16_t *output, int16_t *low, int16_t *high,
 238                               int width, int clip)
 239 {
 240     filter(output, 1, low, 1, high, 1, width, clip);
 241 }
 242
 243 static void horiz_filter_clip_bayer(int16_t *output, int16_t *low, int16_t *high,
 244                                     int width, int clip)
 245 {
 246     filter(output, 2, low, 1, high, 1, width, clip);
 247 }
 248
 249 static void vert_filter(int16_t *output, ptrdiff_t out_stride,
 250                         int16_t *low, ptrdiff_t low_stride,
 251                         int16_t *high, ptrdiff_t high_stride, int len)
 252 {
 253     filter(output, out_stride, low, low_stride, high, high_stride, len, 0);
 254 }
 255
 256 static void free_buffers(CFHDContext *s)
 257 {
 258     int i, j;
 259
 260     for (i = 0; i < FF_ARRAY_ELEMS(s->plane); i++) {
 261         av_freep(&s->plane[i].idwt_buf);
 262         av_freep(&s->plane[i].idwt_tmp);
 263
 264         for (j = 0; j < 9; j++)
 265             s->plane[i].subband[j] = NULL;
 266
 267         for (j = 0; j < 8; j++)
 268             s->plane[i].l_h[j] = NULL;
 269     }
 270     s->a_height = 0;
 271     s->a_width  = 0;
 272 }
 273
 274 static int alloc_buffers(AVCodecContext *avctx)
 275 {
 276     CFHDContext *s = avctx->priv_data;
 277     int i, j, ret, planes;
 278     int chroma_x_shift, chroma_y_shift;
 279     unsigned k;
 280
 281     if (s->coded_format == AV_PIX_FMT_BAYER_RGGB16) {
 282         s->coded_width *= 2;
 283         s->coded_height *= 2;
 284     }
 285
 286     if ((ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height)) < 0)
 287         return ret;
 288     avctx->pix_fmt = s->coded_format;
 289
 290     if ((ret = av_pix_fmt_get_chroma_sub_sample(s->coded_format,
 291                                                 &chroma_x_shift,
 292                                                 &chroma_y_shift)) < 0)
 293         return ret;
 294     planes = av_pix_fmt_count_planes(s->coded_format);
 295     if (s->coded_format == AV_PIX_FMT_BAYER_RGGB16) {
 296         planes = 4;
 297         chroma_x_shift = 1;
 298         chroma_y_shift = 1;
 299     }
 300
 301     for (i = 0; i < planes; i++) {
 302         int w8, h8, w4, h4, w2, h2;
 303         int width  = i ? avctx->width  >> chroma_x_shift : avctx->width;
 304         int height = i ? avctx->height >> chroma_y_shift : avctx->height;
 305         ptrdiff_t stride = FFALIGN(width  / 8, 8) * 8;
 306         if (chroma_y_shift)
 307             height = FFALIGN(height / 8, 2) * 8;
 308         s->plane[i].width  = width;
 309         s->plane[i].height = height;
 310         s->plane[i].stride = stride;
 311
 312         w8 = FFALIGN(s->plane[i].width  / 8, 8);
 313         h8 = FFALIGN(height, 8) / 8;
 314         w4 = w8 * 2;
 315         h4 = h8 * 2;
 316         w2 = w4 * 2;
 317         h2 = h4 * 2;
 318
 319         s->plane[i].idwt_buf =
 320             av_mallocz_array(FFALIGN(height, 8) * stride, sizeof(*s->plane[i].idwt_buf));
 321         s->plane[i].idwt_tmp =
 322             av_malloc_array(FFALIGN(height, 8) * stride, sizeof(*s->plane[i].idwt_tmp));
 323         if (!s->plane[i].idwt_buf || !s->plane[i].idwt_tmp)
 324             return AVERROR(ENOMEM);
 325
 326         s->plane[i].subband[0] = s->plane[i].idwt_buf;
 327         s->plane[i].subband[1] = s->plane[i].idwt_buf + 2 * w8 * h8;
 328         s->plane[i].subband[2] = s->plane[i].idwt_buf + 1 * w8 * h8;
 329         s->plane[i].subband[3] = s->plane[i].idwt_buf + 3 * w8 * h8;
 330         s->plane[i].subband[4] = s->plane[i].idwt_buf + 2 * w4 * h4;
 331         s->plane[i].subband[5] = s->plane[i].idwt_buf + 1 * w4 * h4;
 332         s->plane[i].subband[6] = s->plane[i].idwt_buf + 3 * w4 * h4;
 333         s->plane[i].subband[7] = s->plane[i].idwt_buf + 2 * w2 * h2;
 334         s->plane[i].subband[8] = s->plane[i].idwt_buf + 1 * w2 * h2;
 335         s->plane[i].subband[9] = s->plane[i].idwt_buf + 3 * w2 * h2;
 336
 337         for (j = 0; j < DWT_LEVELS; j++) {
 338             for (k = 0; k < FF_ARRAY_ELEMS(s->plane[i].band[j]); k++) {
 339                 s->plane[i].band[j][k].a_width  = w8 << j;
 340                 s->plane[i].band[j][k].a_height = h8 << j;
 341             }
 342         }
 343
 344         /* ll2 and ll1 commented out because they are done in-place */
 345         s->plane[i].l_h[0] = s->plane[i].idwt_tmp;
 346         s->plane[i].l_h[1] = s->plane[i].idwt_tmp + 2 * w8 * h8;
 347         // s->plane[i].l_h[2] = ll2;
 348         s->plane[i].l_h[3] = s->plane[i].idwt_tmp;
 349         s->plane[i].l_h[4] = s->plane[i].idwt_tmp + 2 * w4 * h4;
 350         // s->plane[i].l_h[5] = ll1;
 351         s->plane[i].l_h[6] = s->plane[i].idwt_tmp;
 352         s->plane[i].l_h[7] = s->plane[i].idwt_tmp + 2 * w2 * h2;
 353     }
 354
 355     s->a_height = s->coded_height;
 356     s->a_width  = s->coded_width;
 357     s->a_format = s->coded_format;
 358
 359     return 0;
 360 }
 361
 362 static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
 363                        AVPacket *avpkt)
 364 {
 365     CFHDContext *s = avctx->priv_data;
 366     GetByteContext gb;
 367     ThreadFrame frame = { .f = data };
 368     AVFrame *pic = data;
 369     int ret = 0, i, j, planes, plane, got_buffer = 0;
 370     int16_t *coeff_data;
 371
 372     s->coded_format = AV_PIX_FMT_YUV422P10;
 373     init_frame_defaults(s);
 374     planes = av_pix_fmt_count_planes(s->coded_format);
 375
 376     bytestream2_init(&gb, avpkt->data, avpkt->size);
 377
 378     while (bytestream2_get_bytes_left(&gb) > 4) {
 379         /* Bit weird but implement the tag parsing as the spec says */
 380         uint16_t tagu   = bytestream2_get_be16(&gb);
 381         int16_t tag     = (int16_t)tagu;
 382         int8_t tag8     = (int8_t)(tagu >> 8);
 383         uint16_t abstag = abs(tag);
 384         int8_t abs_tag8 = abs(tag8);
 385         uint16_t data   = bytestream2_get_be16(&gb);
 386         if (abs_tag8 >= 0x60 && abs_tag8 <= 0x6f) {
 387             av_log(avctx, AV_LOG_DEBUG, "large len %x\n", ((tagu & 0xff) << 16) | data);
 388         } else if (tag == SampleFlags) {
 389             av_log(avctx, AV_LOG_DEBUG, "Progressive?%"PRIu16"\n", data);
 390             s->progressive = data & 0x0001;
 391         } else if (tag == ImageWidth) {
 392             av_log(avctx, AV_LOG_DEBUG, "Width %"PRIu16"\n", data);
 393             s->coded_width = data;
 394         } else if (tag == ImageHeight) {
 395             av_log(avctx, AV_LOG_DEBUG, "Height %"PRIu16"\n", data);
 396             s->coded_height = data;
 397         } else if (tag == BitsPerComponent) {
 398             av_log(avctx, AV_LOG_DEBUG, "Bits per component: %"PRIu16"\n", data);
 399             if (data < 1 || data > 31) {
 400                 av_log(avctx, AV_LOG_ERROR, "Bits per component %d is invalid\n", data);
 401                 ret = AVERROR(EINVAL);
 402                 break;
 403             }
 404             s->bpc = data;
 405         } else if (tag == ChannelCount) {
 406             av_log(avctx, AV_LOG_DEBUG, "Channel Count: %"PRIu16"\n", data);
 407             s->channel_cnt = data;
 408             if (data > 4) {
 409                 av_log(avctx, AV_LOG_ERROR, "Channel Count of %"PRIu16" is unsupported\n", data);
 410                 ret = AVERROR_PATCHWELCOME;
 411                 break;
 412             }
 413         } else if (tag == SubbandCount) {
 414             av_log(avctx, AV_LOG_DEBUG, "Subband Count: %"PRIu16"\n", data);
 415             if (data != SUBBAND_COUNT) {
 416                 av_log(avctx, AV_LOG_ERROR, "Subband Count of %"PRIu16" is unsupported\n", data);
 417                 ret = AVERROR_PATCHWELCOME;
 418                 break;
 419             }
 420         } else if (tag == ChannelNumber) {
 421             s->channel_num = data;
 422             av_log(avctx, AV_LOG_DEBUG, "Channel number %"PRIu16"\n", data);
 423             if (s->channel_num >= planes) {
 424                 av_log(avctx, AV_LOG_ERROR, "Invalid channel number\n");
 425                 ret = AVERROR(EINVAL);
 426                 break;
 427             }
 428             init_plane_defaults(s);
 429         } else if (tag == SubbandNumber) {
 430             if (s->subband_num != 0 && data == 1)  // hack
 431                 s->level++;
 432             av_log(avctx, AV_LOG_DEBUG, "Subband number %"PRIu16"\n", data);
 433             s->subband_num = data;
 434             if (s->level >= DWT_LEVELS) {
 435                 av_log(avctx, AV_LOG_ERROR, "Invalid level\n");
 436                 ret = AVERROR(EINVAL);
 437                 break;
 438             }
 439             if (s->subband_num > 3) {
 440                 av_log(avctx, AV_LOG_ERROR, "Invalid subband number\n");
 441                 ret = AVERROR(EINVAL);
 442                 break;
 443             }
 444         } else if (tag == SubbandBand) {
 445             av_log(avctx, AV_LOG_DEBUG, "Subband number actual %"PRIu16"\n", data);
 446             s->subband_num_actual = data;
 447             if (s->subband_num_actual >= 10) {
 448                 av_log(avctx, AV_LOG_ERROR, "Invalid subband number actual\n");
 449                 ret = AVERROR(EINVAL);
 450                 break;
 451             }
 452         } else if (tag == LowpassPrecision)
 453             av_log(avctx, AV_LOG_DEBUG, "Lowpass precision bits: %"PRIu16"\n", data);
 454         else if (tag == Quantization) {
 455             s->quantisation = data;
 456             av_log(avctx, AV_LOG_DEBUG, "Quantisation: %"PRIu16"\n", data);
 457         } else if (tag == PrescaleShift) {
 458             s->prescale_shift[0] = (data >> 0) & 0x7;
 459             s->prescale_shift[1] = (data >> 3) & 0x7;
 460             s->prescale_shift[2] = (data >> 6) & 0x7;
 461             av_log(avctx, AV_LOG_DEBUG, "Prescale shift (VC-5): %x\n", data);
 462         } else if (tag == LowpassWidth) {
 463             av_log(avctx, AV_LOG_DEBUG, "Lowpass width %"PRIu16"\n", data);
 464             if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_width) {
 465                 av_log(avctx, AV_LOG_ERROR, "Invalid lowpass width\n");
 466                 ret = AVERROR(EINVAL);
 467                 break;
 468             }
 469             s->plane[s->channel_num].band[0][0].width  = data;
 470             s->plane[s->channel_num].band[0][0].stride = data;
 471         } else if (tag == LowpassHeight) {
 472             av_log(avctx, AV_LOG_DEBUG, "Lowpass height %"PRIu16"\n", data);
 473             if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_height) {
 474                 av_log(avctx, AV_LOG_ERROR, "Invalid lowpass height\n");
 475                 ret = AVERROR(EINVAL);
 476                 break;
 477             }
 478             s->plane[s->channel_num].band[0][0].height = data;
 479         } else if (tag == SampleType)
 480             av_log(avctx, AV_LOG_DEBUG, "Sample type? %"PRIu16"\n", data);
 481         else if (tag == TransformType) {
 482             if (data != 0) {
 483                 avpriv_report_missing_feature(avctx, "Transform type of %"PRIu16, data);
 484                 ret = AVERROR_PATCHWELCOME;
 485                 break;
 486             }
 487             av_log(avctx, AV_LOG_DEBUG, "Transform-type? %"PRIu16"\n", data);
 488         } else if (abstag >= 0x4000 && abstag <= 0x40ff) {
 489             if (abstag == 0x4001)
 490                 s->peak.level = 0;
 491             av_log(avctx, AV_LOG_DEBUG, "Small chunk length %d %s\n", data * 4, tag < 0 ? "optional" : "required");
 492             bytestream2_skipu(&gb, data * 4);
 493         } else if (tag == 23) {
 494             av_log(avctx, AV_LOG_DEBUG, "Skip frame\n");
 495             avpriv_report_missing_feature(avctx, "Skip frame");
 496             ret = AVERROR_PATCHWELCOME;
 497             break;
 498         } else if (tag == SampleIndexTable) {
 499             av_log(avctx, AV_LOG_DEBUG, "tag=2 header - skipping %i tag/value pairs\n", data);
 500             if (data > bytestream2_get_bytes_left(&gb) / 4) {
 501                 av_log(avctx, AV_LOG_ERROR, "too many tag/value pairs (%d)\n", data);
 502                 ret = AVERROR_INVALIDDATA;
 503                 break;
 504             }
 505             for (i = 0; i < data; i++) {
 506                 uint16_t tag2 = bytestream2_get_be16(&gb);
 507                 uint16_t val2 = bytestream2_get_be16(&gb);
 508                 av_log(avctx, AV_LOG_DEBUG, "Tag/Value = %x %x\n", tag2, val2);
 509             }
 510         } else if (tag == HighpassWidth) {
 511             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);
 512             if (data < 3) {
 513                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass width\n");
 514                 ret = AVERROR(EINVAL);
 515                 break;
 516             }
 517             s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;
 518             s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
 519         } else if (tag == HighpassHeight) {
 520             av_log(avctx, AV_LOG_DEBUG, "Highpass height %i\n", data);
 521             if (data < 3) {
 522                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass height\n");
 523                 ret = AVERROR(EINVAL);
 524                 break;
 525             }
 526             s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
 527         } else if (tag == BandWidth) {
 528             av_log(avctx, AV_LOG_DEBUG, "Highpass width2 %i\n", data);
 529             if (data < 3) {
 530                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass width2\n");
 531                 ret = AVERROR(EINVAL);
 532                 break;
 533             }
 534             s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;
 535             s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
 536         } else if (tag == BandHeight) {
 537             av_log(avctx, AV_LOG_DEBUG, "Highpass height2 %i\n", data);
 538             if (data < 3) {
 539                 av_log(avctx, AV_LOG_ERROR, "Invalid highpass height2\n");
 540                 ret = AVERROR(EINVAL);
 541                 break;
 542             }
 543             s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
 544         } else if (tag == 71) {
 545             s->codebook = data;
 546             av_log(avctx, AV_LOG_DEBUG, "Codebook %i\n", s->codebook);
 547         } else if (tag == BandCodingFlags) {
 548             s->codebook = data & 0xf;
 549             s->difference_coding = (data >> 4) & 1;
 550             av_log(avctx, AV_LOG_DEBUG, "Other codebook? %i\n", s->codebook);
 551         } else if (tag == Precision) {
 552             av_log(avctx, AV_LOG_DEBUG, "Precision %i\n", data);
 553             if (!(data == 10 || data == 12)) {
 554                 av_log(avctx, AV_LOG_ERROR, "Invalid bits per channel\n");
 555                 ret = AVERROR(EINVAL);
 556                 break;
 557             }
 558             s->bpc = data;
 559         } else if (tag == EncodedFormat) {
 560             av_log(avctx, AV_LOG_DEBUG, "Sample format? %i\n", data);
 561             if (data == 1) {
 562                 s->coded_format = AV_PIX_FMT_YUV422P10;
 563             } else if (data == 2) {
 564                 s->coded_format = AV_PIX_FMT_BAYER_RGGB16;
 565             } else if (data == 3) {
 566                 s->coded_format = AV_PIX_FMT_GBRP12;
 567             } else if (data == 4) {
 568                 s->coded_format = AV_PIX_FMT_GBRAP12;
 569             } else {
 570                 avpriv_report_missing_feature(avctx, "Sample format of %"PRIu16, data);
 571                 ret = AVERROR_PATCHWELCOME;
 572                 break;
 573             }
 574             planes = data == 2 ? 4 : av_pix_fmt_count_planes(s->coded_format);
 575         } else if (tag == -85) {
 576             av_log(avctx, AV_LOG_DEBUG, "Cropped height %"PRIu16"\n", data);
 577             s->cropped_height = data;
 578         } else if (tag == -75) {
 579             s->peak.offset &= ~0xffff;
 580             s->peak.offset |= (data & 0xffff);
 581             s->peak.base    = gb;
 582             s->peak.level   = 0;
 583         } else if (tag == -76) {
 584             s->peak.offset &= 0xffff;
 585             s->peak.offset |= (data & 0xffffU)<<16;
 586             s->peak.base    = gb;
 587             s->peak.level   = 0;
 588         } else if (tag == -74 && s->peak.offset) {
 589             s->peak.level = data;
 590             bytestream2_seek(&s->peak.base, s->peak.offset - 4, SEEK_CUR);
 591         } else
 592             av_log(avctx, AV_LOG_DEBUG,  "Unknown tag %i data %x\n", tag, data);
 593
 594         /* Some kind of end of header tag */
 595         if (tag == BitstreamMarker && data == 0x1a4a && s->coded_width && s->coded_height &&
 596             s->coded_format != AV_PIX_FMT_NONE) {
 597             if (s->a_width != s->coded_width || s->a_height != s->coded_height ||
 598                 s->a_format != s->coded_format) {
 599                 free_buffers(s);
 600                 if ((ret = alloc_buffers(avctx)) < 0) {
 601                     free_buffers(s);
 602                     return ret;
 603                 }
 604             }
 605             ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height);
 606             if (ret < 0)
 607                 return ret;
 608             if (s->cropped_height) {
 609                 unsigned height = s->cropped_height << (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16);
 610                 if (avctx->height < height)
 611                     return AVERROR_INVALIDDATA;
 612                 avctx->height = height;
 613             }
 614             frame.f->width =
 615             frame.f->height = 0;
 616
 617             if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
 618                 return ret;
 619
 620             s->coded_width = 0;
 621             s->coded_height = 0;
 622             s->coded_format = AV_PIX_FMT_NONE;
 623             got_buffer = 1;
 624         }
 625         coeff_data = s->plane[s->channel_num].subband[s->subband_num_actual];
 626
 627         /* Lowpass coefficients */
 628         if (tag == BitstreamMarker && data == 0xf0f && s->a_width && s->a_height) {
 629             int lowpass_height = s->plane[s->channel_num].band[0][0].height;
 630             int lowpass_width  = s->plane[s->channel_num].band[0][0].width;
 631             int lowpass_a_height = s->plane[s->channel_num].band[0][0].a_height;
 632             int lowpass_a_width  = s->plane[s->channel_num].band[0][0].a_width;
 633
 634             if (!got_buffer) {
 635                 av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 636                 ret = AVERROR(EINVAL);
 637                 goto end;
 638             }
 639
 640             if (lowpass_height > lowpass_a_height || lowpass_width > lowpass_a_width ||
 641                 lowpass_a_width * lowpass_a_height * sizeof(int16_t) > bytestream2_get_bytes_left(&gb)) {
 642                 av_log(avctx, AV_LOG_ERROR, "Too many lowpass coefficients\n");
 643                 ret = AVERROR(EINVAL);
 644                 goto end;
 645             }
 646
 647             av_log(avctx, AV_LOG_DEBUG, "Start of lowpass coeffs component %d height:%d, width:%d\n", s->channel_num, lowpass_height, lowpass_width);
 648             for (i = 0; i < lowpass_height; i++) {
 649                 for (j = 0; j < lowpass_width; j++)
 650                     coeff_data[j] = bytestream2_get_be16u(&gb);
 651
 652                 coeff_data += lowpass_width;
 653             }
 654
 655             /* Align to mod-4 position to continue reading tags */
 656             bytestream2_seek(&gb, bytestream2_tell(&gb) & 3, SEEK_CUR);
 657
 658             /* Copy last line of coefficients if odd height */
 659             if (lowpass_height & 1) {
 660                 memcpy(&coeff_data[lowpass_height * lowpass_width],
 661                        &coeff_data[(lowpass_height - 1) * lowpass_width],
 662                        lowpass_width * sizeof(*coeff_data));
 663             }
 664
 665             av_log(avctx, AV_LOG_DEBUG, "Lowpass coefficients %d\n", lowpass_width * lowpass_height);
 666         }
 667
 668         if (tag == BandHeader && s->subband_num_actual != 255 && s->a_width && s->a_height) {
 669             int highpass_height = s->plane[s->channel_num].band[s->level][s->subband_num].height;
 670             int highpass_width  = s->plane[s->channel_num].band[s->level][s->subband_num].width;
 671             int highpass_a_width = s->plane[s->channel_num].band[s->level][s->subband_num].a_width;
 672             int highpass_a_height = s->plane[s->channel_num].band[s->level][s->subband_num].a_height;
 673             int highpass_stride = s->plane[s->channel_num].band[s->level][s->subband_num].stride;
 674             int expected;
 675             int a_expected = highpass_a_height * highpass_a_width;
 676             int level, run, coeff;
 677             int count = 0, bytes;
 678
 679             if (!got_buffer) {
 680                 av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 681                 ret = AVERROR(EINVAL);
 682                 goto end;
 683             }
 684
 685             if (highpass_height > highpass_a_height || highpass_width > highpass_a_width || a_expected < highpass_height * (uint64_t)highpass_stride) {
 686                 av_log(avctx, AV_LOG_ERROR, "Too many highpass coefficients\n");
 687                 ret = AVERROR(EINVAL);
 688                 goto end;
 689             }
 690             expected = highpass_height * highpass_stride;
 691
 692             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);
 693
 694             init_get_bits(&s->gb, gb.buffer, bytestream2_get_bytes_left(&gb) * 8);
 695             {
 696                 OPEN_READER(re, &s->gb);
 697                 if (!s->codebook) {
 698                     while (1) {
 699                         UPDATE_CACHE(re, &s->gb);
 700                         GET_RL_VLC(level, run, re, &s->gb, s->table_9_rl_vlc,
 701                                    VLC_BITS, 3, 1);
 702
 703                         /* escape */
 704                         if (level == 64)
 705                             break;
 706
 707                         count += run;
 708
 709                         if (count > expected)
 710                             break;
 711
 712                         coeff = dequant_and_decompand(level, s->quantisation, 0);
 713                         for (i = 0; i < run; i++)
 714                             *coeff_data++ = coeff;
 715                     }
 716                 } else {
 717                     while (1) {
 718                         UPDATE_CACHE(re, &s->gb);
 719                         GET_RL_VLC(level, run, re, &s->gb, s->table_18_rl_vlc,
 720                                    VLC_BITS, 3, 1);
 721
 722                         /* escape */
 723                         if (level == 255 && run == 2)
 724                             break;
 725
 726                         count += run;
 727
 728                         if (count > expected)
 729                             break;
 730
 731                         coeff = dequant_and_decompand(level, s->quantisation, s->codebook);
 732                         for (i = 0; i < run; i++)
 733                             *coeff_data++ = coeff;
 734                     }
 735                 }
 736                 CLOSE_READER(re, &s->gb);
 737             }
 738
 739             if (count > expected) {
 740                 av_log(avctx, AV_LOG_ERROR, "Escape codeword not found, probably corrupt data\n");
 741                 ret = AVERROR(EINVAL);
 742                 goto end;
 743             }
 744             if (s->peak.level)
 745                 peak_table(coeff_data - count, &s->peak, count);
 746             if (s->difference_coding)
 747                 difference_coding(s->plane[s->channel_num].subband[s->subband_num_actual], highpass_width, highpass_height);
 748
 749             bytes = FFALIGN(AV_CEIL_RSHIFT(get_bits_count(&s->gb), 3), 4);
 750             if (bytes > bytestream2_get_bytes_left(&gb)) {
 751                 av_log(avctx, AV_LOG_ERROR, "Bitstream overread error\n");
 752                 ret = AVERROR(EINVAL);
 753                 goto end;
 754             } else
 755                 bytestream2_seek(&gb, bytes, SEEK_CUR);
 756
 757             av_log(avctx, AV_LOG_DEBUG, "End subband coeffs %i extra %i\n", count, count - expected);
 758             s->codebook = 0;
 759
 760             /* Copy last line of coefficients if odd height */
 761             if (highpass_height & 1) {
 762                 memcpy(&coeff_data[highpass_height * highpass_stride],
 763                        &coeff_data[(highpass_height - 1) * highpass_stride],
 764                        highpass_stride * sizeof(*coeff_data));
 765             }
 766         }
 767     }
 768
 769     if (!s->a_width || !s->a_height || s->a_format == AV_PIX_FMT_NONE ||
 770         s->coded_width || s->coded_height || s->coded_format != AV_PIX_FMT_NONE) {
 771         av_log(avctx, AV_LOG_ERROR, "Invalid dimensions\n");
 772         ret = AVERROR(EINVAL);
 773         goto end;
 774     }
 775
 776     if (!got_buffer) {
 777         av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
 778         ret = AVERROR(EINVAL);
 779         goto end;
 780     }
 781
 782     planes = av_pix_fmt_count_planes(avctx->pix_fmt);
 783     if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16) {
 784         if (!s->progressive)
 785             return AVERROR_INVALIDDATA;
 786         planes = 4;
 787     }
 788
 789     for (plane = 0; plane < planes && !ret; plane++) {
 790         /* level 1 */
 791         int lowpass_height  = s->plane[plane].band[0][0].height;
 792         int lowpass_width   = s->plane[plane].band[0][0].width;
 793         int highpass_stride = s->plane[plane].band[0][1].stride;
 794         int act_plane = plane == 1 ? 2 : plane == 2 ? 1 : plane;
 795         ptrdiff_t dst_linesize;
 796         int16_t *low, *high, *output, *dst;
 797
 798         if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16) {
 799             act_plane = 0;
 800             dst_linesize = pic->linesize[act_plane];
 801         } else {
 802             dst_linesize = pic->linesize[act_plane] / 2;
 803         }
 804
 805         if (lowpass_height > s->plane[plane].band[0][0].a_height || lowpass_width > s->plane[plane].band[0][0].a_width ||
 806             !highpass_stride || s->plane[plane].band[0][1].width > s->plane[plane].band[0][1].a_width) {
 807             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 808             ret = AVERROR(EINVAL);
 809             goto end;
 810         }
 811
 812         av_log(avctx, AV_LOG_DEBUG, "Decoding level 1 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 813
 814         low    = s->plane[plane].subband[0];
 815         high   = s->plane[plane].subband[2];
 816         output = s->plane[plane].l_h[0];
 817         for (i = 0; i < lowpass_width; i++) {
 818             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 819             low++;
 820             high++;
 821             output++;
 822         }
 823
 824         low    = s->plane[plane].subband[1];
 825         high   = s->plane[plane].subband[3];
 826         output = s->plane[plane].l_h[1];
 827
 828         for (i = 0; i < lowpass_width; i++) {
 829             // note the stride of "low" is highpass_stride
 830             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 831             low++;
 832             high++;
 833             output++;
 834         }
 835
 836         low    = s->plane[plane].l_h[0];
 837         high   = s->plane[plane].l_h[1];
 838         output = s->plane[plane].subband[0];
 839         for (i = 0; i < lowpass_height * 2; i++) {
 840             horiz_filter(output, low, high, lowpass_width);
 841             low    += lowpass_width;
 842             high   += lowpass_width;
 843             output += lowpass_width * 2;
 844         }
 845         if (s->bpc == 12) {
 846             output = s->plane[plane].subband[0];
 847             for (i = 0; i < lowpass_height * 2; i++) {
 848                 for (j = 0; j < lowpass_width * 2; j++)
 849                     output[j] *= 4;
 850
 851                 output += lowpass_width * 2;
 852             }
 853         }
 854
 855         /* level 2 */
 856         lowpass_height  = s->plane[plane].band[1][1].height;
 857         lowpass_width   = s->plane[plane].band[1][1].width;
 858         highpass_stride = s->plane[plane].band[1][1].stride;
 859
 860         if (lowpass_height > s->plane[plane].band[1][1].a_height || lowpass_width > s->plane[plane].band[1][1].a_width ||
 861             !highpass_stride || s->plane[plane].band[1][1].width > s->plane[plane].band[1][1].a_width) {
 862             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 863             ret = AVERROR(EINVAL);
 864             goto end;
 865         }
 866
 867         av_log(avctx, AV_LOG_DEBUG, "Level 2 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 868
 869         low    = s->plane[plane].subband[0];
 870         high   = s->plane[plane].subband[5];
 871         output = s->plane[plane].l_h[3];
 872         for (i = 0; i < lowpass_width; i++) {
 873             vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 874             low++;
 875             high++;
 876             output++;
 877         }
 878
 879         low    = s->plane[plane].subband[4];
 880         high   = s->plane[plane].subband[6];
 881         output = s->plane[plane].l_h[4];
 882         for (i = 0; i < lowpass_width; i++) {
 883             vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 884             low++;
 885             high++;
 886             output++;
 887         }
 888
 889         low    = s->plane[plane].l_h[3];
 890         high   = s->plane[plane].l_h[4];
 891         output = s->plane[plane].subband[0];
 892         for (i = 0; i < lowpass_height * 2; i++) {
 893             horiz_filter(output, low, high, lowpass_width);
 894             low    += lowpass_width;
 895             high   += lowpass_width;
 896             output += lowpass_width * 2;
 897         }
 898
 899         output = s->plane[plane].subband[0];
 900         for (i = 0; i < lowpass_height * 2; i++) {
 901             for (j = 0; j < lowpass_width * 2; j++)
 902                 output[j] *= 4;
 903
 904             output += lowpass_width * 2;
 905         }
 906
 907         /* level 3 */
 908         lowpass_height  = s->plane[plane].band[2][1].height;
 909         lowpass_width   = s->plane[plane].band[2][1].width;
 910         highpass_stride = s->plane[plane].band[2][1].stride;
 911
 912         if (lowpass_height > s->plane[plane].band[2][1].a_height || lowpass_width > s->plane[plane].band[2][1].a_width ||
 913             !highpass_stride || s->plane[plane].band[2][1].width > s->plane[plane].band[2][1].a_width) {
 914             av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
 915             ret = AVERROR(EINVAL);
 916             goto end;
 917         }
 918
 919         av_log(avctx, AV_LOG_DEBUG, "Level 3 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);
 920         if (s->progressive) {
 921             low    = s->plane[plane].subband[0];
 922             high   = s->plane[plane].subband[8];
 923             output = s->plane[plane].l_h[6];
 924             for (i = 0; i < lowpass_width; i++) {
 925                 vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
 926                 low++;
 927                 high++;
 928                 output++;
 929             }
 930
 931             low    = s->plane[plane].subband[7];
 932             high   = s->plane[plane].subband[9];
 933             output = s->plane[plane].l_h[7];
 934             for (i = 0; i < lowpass_width; i++) {
 935                 vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
 936                 low++;
 937                 high++;
 938                 output++;
 939             }
 940
 941             dst = (int16_t *)pic->data[act_plane];
 942             if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16) {
 943                 if (plane & 1)
 944                     dst++;
 945                 if (plane > 1)
 946                     dst += pic->linesize[act_plane] >> 1;
 947             }
 948             low  = s->plane[plane].l_h[6];
 949             high = s->plane[plane].l_h[7];
 950
 951             if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16 &&
 952                 (lowpass_height * 2 > avctx->coded_height / 2 ||
 953                  lowpass_width  * 2 > avctx->coded_width  / 2    )
 954                 ) {
 955                 ret = AVERROR_INVALIDDATA;
 956                 goto end;
 957             }
 958
 959             for (i = 0; i < lowpass_height * 2; i++) {
 960                 if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16)
 961                     horiz_filter_clip_bayer(dst, low, high, lowpass_width, s->bpc);
 962                 else
 963                     horiz_filter_clip(dst, low, high, lowpass_width, s->bpc);
 964                 if (avctx->pix_fmt == AV_PIX_FMT_GBRAP12 && act_plane == 3)
 965                     process_alpha(dst, lowpass_width * 2);
 966                 low  += lowpass_width;
 967                 high += lowpass_width;
 968                 dst  += dst_linesize;
 969             }
 970         } else {
 971             av_log(avctx, AV_LOG_DEBUG, "interlaced frame ? %d", pic->interlaced_frame);
 972             pic->interlaced_frame = 1;
 973             low    = s->plane[plane].subband[0];
 974             high   = s->plane[plane].subband[7];
 975             output = s->plane[plane].l_h[6];
 976             for (i = 0; i < lowpass_height; i++) {
 977                 horiz_filter(output, low, high, lowpass_width);
 978                 low    += lowpass_width;
 979                 high   += lowpass_width;
 980                 output += lowpass_width * 2;
 981             }
 982
 983             low    = s->plane[plane].subband[8];
 984             high   = s->plane[plane].subband[9];
 985             output = s->plane[plane].l_h[7];
 986             for (i = 0; i < lowpass_height; i++) {
 987                 horiz_filter(output, low, high, lowpass_width);
 988                 low    += lowpass_width;
 989                 high   += lowpass_width;
 990                 output += lowpass_width * 2;
 991             }
 992
 993             dst  = (int16_t *)pic->data[act_plane];
 994             low  = s->plane[plane].l_h[6];
 995             high = s->plane[plane].l_h[7];
 996             for (i = 0; i < lowpass_height; i++) {
 997                 interlaced_vertical_filter(dst, low, high, lowpass_width * 2,  pic->linesize[act_plane]/2, act_plane);
 998                 low  += lowpass_width * 2;
 999                 high += lowpass_width * 2;
1000                 dst  += pic->linesize[act_plane];
1001             }
1002         }
1003     }
1004
1005
1006     if (avctx->pix_fmt == AV_PIX_FMT_BAYER_RGGB16)
1007         process_bayer(pic);
1008 end:
1009     if (ret < 0)
1010         return ret;
1011
1012     *got_frame = 1;
1013     return avpkt->size;
1014 }
1015
1016 static av_cold int cfhd_close(AVCodecContext *avctx)
1017 {
1018     CFHDContext *s = avctx->priv_data;
1019
1020     free_buffers(s);
1021
1022     ff_free_vlc(&s->vlc_9);
1023     ff_free_vlc(&s->vlc_18);
1024
1025     return 0;
1026 }
1027
1028 AVCodec ff_cfhd_decoder = {
1029     .name             = "cfhd",
1030     .long_name        = NULL_IF_CONFIG_SMALL("Cineform HD"),
1031     .type             = AVMEDIA_TYPE_VIDEO,
1032     .id               = AV_CODEC_ID_CFHD,
1033     .priv_data_size   = sizeof(CFHDContext),
1034     .init             = cfhd_init,
1035     .close            = cfhd_close,
1036     .decode           = cfhd_decode,
1037     .capabilities     = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
1038     .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
1039 };