cfhd.c 31.1 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139
/*
 * Copyright (c) 2015-2016 Kieran Kunhya <kieran@kunhya.com>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file
 * CFHD Video Decoder
 */

#include "libavutil/buffer.h"
#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"

#include "avcodec.h"
#include "internal.h"
#include "bytestream.h"
#include "thread.h"
#include "cfhd.h"

#define SUBBAND_COUNT 10

static av_cold int cfhd_decode_init(AVCodecContext *avctx)
{
    CFHDContext *s = avctx->priv_data;

    avctx->bits_per_raw_sample = 10;
    s->avctx                   = avctx;

    return ff_cfhd_init_vlcs(s);
}

static void init_plane_defaults(CFHDContext *s)
{
    s->subband_num        = 0;
    s->level              = 0;
    s->subband_num_actual = 0;
}

static void init_frame_defaults(CFHDContext *s)
{
    s->coded_width       = 0;
    s->coded_height      = 0;
    s->bpc               = 10;
    s->channel_cnt       = 4;
    s->subband_cnt       = 10;
    s->channel_num       = 0;
    s->lowpass_precision = 16;
    s->quantisation      = 1;
    s->wavelet_depth     = 3;
    s->pshift            = 1;
    s->codebook          = 0;
    init_plane_defaults(s);
}

/* TODO: merge with VLC tables or use LUT */
static inline int dequant_and_decompand(int level, int quantisation)
{
    int64_t abslevel = abs(level);
    return (abslevel + ((768 * abslevel * abslevel * abslevel) / (255 * 255 * 255))) * FFSIGN(level) * quantisation;
}

static inline void filter(int16_t *output, ptrdiff_t out_stride, int16_t *low, ptrdiff_t low_stride,
                          int16_t *high, ptrdiff_t high_stride, int len, uint8_t clip)
{
    int16_t tmp;

    int i;
    for (i = 0; i < len; i++) {
        if (i == 0) {
            tmp = (11*low[0*low_stride] - 4*low[1*low_stride] + low[2*low_stride] + 4) >> 3;
            output[(2*i+0)*out_stride] = (tmp + high[0*high_stride]) >> 1;
            if (clip)
                output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);

            tmp = ( 5*low[0*low_stride] + 4*low[1*low_stride] - low[2*low_stride] + 4) >> 3;
            output[(2*i+1)*out_stride] = (tmp - high[0*high_stride]) >> 1;
            if (clip)
                output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
        } else if (i == len-1) {
            tmp = ( 5*low[i*low_stride] + 4*low[(i-1)*low_stride] - low[(i-2)*low_stride] + 4) >> 3;
            output[(2*i+0)*out_stride] = (tmp + high[i*high_stride]) >> 1;
            if (clip)
                output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);

            tmp = (11*low[i*low_stride] - 4*low[(i-1)*low_stride] + low[(i-2)*low_stride] + 4) >> 3;
            output[(2*i+1)*out_stride] = (tmp - high[i*high_stride]) >> 1;
            if (clip)
                output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
        } else {
            tmp = (low[(i-1)*low_stride] - low[(i+1)*low_stride] + 4) >> 3;
            output[(2*i+0)*out_stride] = (tmp + low[i*low_stride] + high[i*high_stride]) >> 1;
            if (clip)
                output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);

            tmp = (low[(i+1)*low_stride] - low[(i-1)*low_stride] + 4) >> 3;
            output[(2*i+1)*out_stride] = (tmp + low[i*low_stride] - high[i*high_stride]) >> 1;
            if (clip)
                output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
        }
    }
}

static void horiz_filter(int16_t *output, int16_t *low, int16_t *high, int width)
{
    filter(output, 1, low, 1, high, 1, width, 0);
}

static void horiz_filter_clip(int16_t *output, int16_t *low, int16_t *high, int width, uint8_t clip)
{
    filter(output, 1, low, 1, high, 1, width, clip);
}

static void vert_filter(int16_t *output, int out_stride, int16_t *low, int low_stride,
                        int16_t *high, int high_stride, int len)
{
    filter(output, out_stride, low, low_stride, high, high_stride, len, 0);
}

static void free_buffers(AVCodecContext *avctx)
{
    CFHDContext *s = avctx->priv_data;
140
    int i, j;
141

142
    for (i = 0; i < 4; i++) {
143 144
        av_freep(&s->plane[i].idwt_buf);
        av_freep(&s->plane[i].idwt_tmp);
145 146 147 148 149 150

        for (j = 0; j < 9; j++)
            s->plane[i].subband[j] = NULL;

        for (j = 0; j < 8; j++)
            s->plane[i].l_h[j] = NULL;
151 152 153 154 155 156 157 158
    }
    s->a_height = 0;
    s->a_width  = 0;
}

static int alloc_buffers(AVCodecContext *avctx)
{
    CFHDContext *s = avctx->priv_data;
159
    int i, j, k, ret, planes;
160 161 162

    if ((ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height)) < 0)
        return ret;
163
    avctx->pix_fmt = s->coded_format;
164 165

    avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_x_shift, &s->chroma_y_shift);
166
    planes = av_pix_fmt_count_planes(avctx->pix_fmt);
167

168
    for (i = 0; i < planes; i++) {
169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184
        int width = i ? avctx->width >> s->chroma_x_shift : avctx->width;
        int height = i ? avctx->height >> s->chroma_y_shift : avctx->height;
        int stride = FFALIGN(width / 8, 8) * 8;
        int w8, h8, w4, h4, w2, h2;
        height = FFALIGN(height / 8, 2) * 8;
        s->plane[i].width = width;
        s->plane[i].height = height;
        s->plane[i].stride = stride;

        w8 = FFALIGN(s->plane[i].width / 8, 8);
        h8 = FFALIGN(s->plane[i].height / 8, 2);
        w4 = w8 * 2;
        h4 = h8 * 2;
        w2 = w4 * 2;
        h2 = h4 * 2;

185
        s->plane[i].idwt_buf = av_mallocz_array(height * stride, sizeof(*s->plane[i].idwt_buf));
186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221
        s->plane[i].idwt_tmp = av_malloc_array(height * stride, sizeof(*s->plane[i].idwt_tmp));
        if (!s->plane[i].idwt_buf || !s->plane[i].idwt_tmp) {
            return AVERROR(ENOMEM);
        }

        s->plane[i].subband[0] = s->plane[i].idwt_buf;
        s->plane[i].subband[1] = s->plane[i].idwt_buf + 2 * w8 * h8;
        s->plane[i].subband[2] = s->plane[i].idwt_buf + 1 * w8 * h8;
        s->plane[i].subband[3] = s->plane[i].idwt_buf + 3 * w8 * h8;
        s->plane[i].subband[4] = s->plane[i].idwt_buf + 2 * w4 * h4;
        s->plane[i].subband[5] = s->plane[i].idwt_buf + 1 * w4 * h4;
        s->plane[i].subband[6] = s->plane[i].idwt_buf + 3 * w4 * h4;
        s->plane[i].subband[7] = s->plane[i].idwt_buf + 2 * w2 * h2;
        s->plane[i].subband[8] = s->plane[i].idwt_buf + 1 * w2 * h2;
        s->plane[i].subband[9] = s->plane[i].idwt_buf + 3 * w2 * h2;

        for (j = 0; j < DWT_LEVELS; j++) {
            for(k = 0; k < 4; k++) {
                s->plane[i].band[j][k].a_width  = w8 << j;
                s->plane[i].band[j][k].a_height = h8 << j;
            }
        }

        /* ll2 and ll1 commented out because they are done in-place */
        s->plane[i].l_h[0] = s->plane[i].idwt_tmp;
        s->plane[i].l_h[1] = s->plane[i].idwt_tmp + 2 * w8 * h8;
        //s->plane[i].l_h[2] = ll2;
        s->plane[i].l_h[3] = s->plane[i].idwt_tmp;
        s->plane[i].l_h[4] = s->plane[i].idwt_tmp + 2 * w4 * h4;
        //s->plane[i].l_h[5] = ll1;
        s->plane[i].l_h[6] = s->plane[i].idwt_tmp;
        s->plane[i].l_h[7] = s->plane[i].idwt_tmp + 2 * w2 * h2;
    }

    s->a_height = s->coded_height;
    s->a_width  = s->coded_width;
222
    s->a_format = s->coded_format;
223 224 225 226 227 228 229 230 231 232 233

    return 0;
}

static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
                       AVPacket *avpkt)
{
    CFHDContext *s = avctx->priv_data;
    GetByteContext gb;
    ThreadFrame frame = { .f = data };
    AVFrame *pic = data;
234
    int ret = 0, i, j, planes, plane, got_buffer = 0;
235 236
    int16_t *coeff_data;

237
    s->coded_format = AV_PIX_FMT_YUV422P10;
238
    init_frame_defaults(s);
239
    planes = av_pix_fmt_count_planes(s->coded_format);
240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264

    bytestream2_init(&gb, avpkt->data, avpkt->size);

    while (bytestream2_get_bytes_left(&gb) > 4) {
        /* Bit weird but implement the tag parsing as the spec says */
        uint16_t tagu   = bytestream2_get_be16(&gb);
        int16_t tag     = (int16_t)tagu;
        int8_t tag8     = (int8_t)(tagu >> 8);
        uint16_t abstag = abs(tag);
        int8_t abs_tag8 = abs(tag8);
        uint16_t data   = bytestream2_get_be16(&gb);
        if (abs_tag8 >= 0x60 && abs_tag8 <= 0x6f) {
            av_log(avctx, AV_LOG_DEBUG, "large len %x\n", ((tagu & 0xff) << 16) | data);
        } else if (tag == 20) {
            av_log(avctx, AV_LOG_DEBUG, "Width %"PRIu16"\n", data);
            s->coded_width = data;
        } else if (tag == 21) {
            av_log(avctx, AV_LOG_DEBUG, "Height %"PRIu16"\n", data);
            s->coded_height = data;
        } else if (tag == 101) {
            av_log(avctx, AV_LOG_DEBUG, "Bits per component: %"PRIu16"\n", data);
            s->bpc = data;
        } else if (tag == 12) {
            av_log(avctx, AV_LOG_DEBUG, "Channel Count: %"PRIu16"\n", data);
            s->channel_cnt = data;
265
            if (data > 4) {
266 267 268 269 270 271 272 273 274 275 276 277 278 279
                av_log(avctx, AV_LOG_ERROR, "Channel Count of %"PRIu16" is unsupported\n", data);
                ret = AVERROR_PATCHWELCOME;
                break;
            }
        } else if (tag == 14) {
            av_log(avctx, AV_LOG_DEBUG, "Subband Count: %"PRIu16"\n", data);
            if (data != SUBBAND_COUNT) {
                av_log(avctx, AV_LOG_ERROR, "Subband Count of %"PRIu16" is unsupported\n", data);
                ret = AVERROR_PATCHWELCOME;
                break;
            }
        } else if (tag == 62) {
            s->channel_num = data;
            av_log(avctx, AV_LOG_DEBUG, "Channel number %"PRIu16"\n", data);
280
            if (s->channel_num >= planes) {
281 282 283 284 285 286 287 288 289 290
                av_log(avctx, AV_LOG_ERROR, "Invalid channel number\n");
                ret = AVERROR(EINVAL);
                break;
            }
            init_plane_defaults(s);
        } else if (tag == 48) {
            if (s->subband_num != 0 && data == 1)  // hack
                s->level++;
            av_log(avctx, AV_LOG_DEBUG, "Subband number %"PRIu16"\n", data);
            s->subband_num = data;
291
            if (s->level >= DWT_LEVELS) {
292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322
                av_log(avctx, AV_LOG_ERROR, "Invalid level\n");
                ret = AVERROR(EINVAL);
                break;
            }
            if (s->subband_num > 3) {
                av_log(avctx, AV_LOG_ERROR, "Invalid subband number\n");
                ret = AVERROR(EINVAL);
                break;
            }
        } else if (tag == 51) {
            av_log(avctx, AV_LOG_DEBUG, "Subband number actual %"PRIu16"\n", data);
            s->subband_num_actual = data;
            if (s->subband_num_actual >= 10) {
                av_log(avctx, AV_LOG_ERROR, "Invalid subband number actual\n");
                ret = AVERROR(EINVAL);
                break;
            }
        } else if (tag == 35)
            av_log(avctx, AV_LOG_DEBUG, "Lowpass precision bits: %"PRIu16"\n", data);
        else if (tag == 53) {
            s->quantisation = data;
            av_log(avctx, AV_LOG_DEBUG, "Quantisation: %"PRIu16"\n", data);
        } else if (tag == 109) {
            s->prescale_shift[0] = (data >> 0) & 0x7;
            s->prescale_shift[1] = (data >> 3) & 0x7;
            s->prescale_shift[2] = (data >> 6) & 0x7;
            av_log(avctx, AV_LOG_DEBUG, "Prescale shift (VC-5): %x\n", data);
        } else if (tag == 27) {
            s->plane[s->channel_num].band[0][0].width  = data;
            s->plane[s->channel_num].band[0][0].stride = data;
            av_log(avctx, AV_LOG_DEBUG, "Lowpass width %"PRIu16"\n", data);
323
            if (data < 3 || data > s->plane[s->channel_num].band[0][0].a_width) {
324 325 326 327 328 329 330
                av_log(avctx, AV_LOG_ERROR, "Invalid lowpass width\n");
                ret = AVERROR(EINVAL);
                break;
            }
        } else if (tag == 28) {
            s->plane[s->channel_num].band[0][0].height = data;
            av_log(avctx, AV_LOG_DEBUG, "Lowpass height %"PRIu16"\n", data);
331
            if (data < 3 || data > s->plane[s->channel_num].band[0][0].height) {
332 333 334 335 336 337 338 339
                av_log(avctx, AV_LOG_ERROR, "Invalid lowpass height\n");
                ret = AVERROR(EINVAL);
                break;
            }
        } else if (tag == 1)
            av_log(avctx, AV_LOG_DEBUG, "Sample type? %"PRIu16"\n", data);
        else if (tag == 10) {
            if (data != 0) {
340
                avpriv_report_missing_feature(avctx, "Transform type of %"PRIu16, data);
341 342 343 344 345
                ret = AVERROR_PATCHWELCOME;
                break;
            }
            av_log(avctx, AV_LOG_DEBUG, "Transform-type? %"PRIu16"\n", data);
        } else if (abstag >= 0x4000 && abstag <= 0x40ff) {
346
            av_log(avctx, AV_LOG_DEBUG, "Small chunk length %d %s\n", data * 4, tag < 0 ? "optional" : "required");
347 348 349
            bytestream2_skipu(&gb, data * 4);
        } else if (tag == 23) {
            av_log(avctx, AV_LOG_DEBUG, "Skip frame\n");
350
            avpriv_report_missing_feature(avctx, "Skip frame");
351 352 353 354
            ret = AVERROR_PATCHWELCOME;
            break;
        } else if (tag == 2) {
            av_log(avctx, AV_LOG_DEBUG, "tag=2 header - skipping %i tag/value pairs\n", data);
355 356 357 358 359
            if (data > bytestream2_get_bytes_left(&gb) / 4) {
                av_log(avctx, AV_LOG_ERROR, "too many tag/value pairs (%d)\n", data);
                ret = AVERROR_INVALIDDATA;
                break;
            }
360 361 362 363 364 365 366 367 368
            for (i = 0; i < data; i++) {
                uint16_t tag2 = bytestream2_get_be16(&gb);
                uint16_t val2 = bytestream2_get_be16(&gb);
                av_log(avctx, AV_LOG_DEBUG, "Tag/Value = %x %x\n", tag2, val2);
            }
        } else if (tag == 41) {
            s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;
            s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
            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);
369
            if (data < 3) {
370 371 372 373 374 375 376
                av_log(avctx, AV_LOG_ERROR, "Invalid highpass width\n");
                ret = AVERROR(EINVAL);
                break;
            }
        } else if (tag == 42) {
            s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
            av_log(avctx, AV_LOG_DEBUG, "Highpass height %i\n", data);
377
            if (data < 3) {
378 379 380 381 382 383 384 385
                av_log(avctx, AV_LOG_ERROR, "Invalid highpass height\n");
                ret = AVERROR(EINVAL);
                break;
            }
        } else if (tag == 49) {
            s->plane[s->channel_num].band[s->level][s->subband_num].width  = data;
            s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
            av_log(avctx, AV_LOG_DEBUG, "Highpass width2 %i\n", data);
386
            if (data < 3) {
387 388 389 390 391 392 393
                av_log(avctx, AV_LOG_ERROR, "Invalid highpass width2\n");
                ret = AVERROR(EINVAL);
                break;
            }
        } else if (tag == 50) {
            s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
            av_log(avctx, AV_LOG_DEBUG, "Highpass height2 %i\n", data);
394
            if (data < 3) {
395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415
                av_log(avctx, AV_LOG_ERROR, "Invalid highpass height2\n");
                ret = AVERROR(EINVAL);
                break;
            }
        } else if (tag == 71) {
            s->codebook = data;
            av_log(avctx, AV_LOG_DEBUG, "Codebook %i\n", s->codebook);
        } else if (tag == 72) {
            s->codebook = data;
            av_log(avctx, AV_LOG_DEBUG, "Other codebook? %i\n", s->codebook);
        } else if (tag == 70) {
            av_log(avctx, AV_LOG_DEBUG, "Subsampling or bit-depth flag? %i\n", data);
            s->bpc = data;
            if (!(s->bpc == 10 || s->bpc == 12)) {
                av_log(avctx, AV_LOG_ERROR, "Invalid bits per channel\n");
                ret = AVERROR(EINVAL);
                break;
            }
        } else if (tag == 84) {
            av_log(avctx, AV_LOG_DEBUG, "Sample format? %i\n", data);
            if (data == 1)
416
                s->coded_format = AV_PIX_FMT_YUV422P10;
417
            else if (data == 3)
418
                s->coded_format = AV_PIX_FMT_GBRP12;
419 420
            else if (data == 4)
                s->coded_format = AV_PIX_FMT_GBRAP12;
421
            else {
422
                avpriv_report_missing_feature(avctx, "Sample format of %"PRIu16, data);
423 424 425
                ret = AVERROR_PATCHWELCOME;
                break;
            }
426
            planes = av_pix_fmt_count_planes(s->coded_format);
427 428 429 430
        } else
            av_log(avctx, AV_LOG_DEBUG,  "Unknown tag %i data %x\n", tag, data);

        /* Some kind of end of header tag */
431 432 433 434
        if (tag == 4 && data == 0x1a4a && s->coded_width && s->coded_height &&
            s->coded_format != AV_PIX_FMT_NONE) {
            if (s->a_width != s->coded_width || s->a_height != s->coded_height ||
                s->a_format != s->coded_format) {
435 436 437 438 439 440
                free_buffers(avctx);
                if ((ret = alloc_buffers(avctx)) < 0) {
                    free_buffers(avctx);
                    return ret;
                }
            }
441 442 443 444 445
            ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height);
            if (ret < 0)
                return ret;
            frame.f->width =
            frame.f->height = 0;
446 447 448 449 450 451

            if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
                return ret;

            s->coded_width = 0;
            s->coded_height = 0;
452
            s->coded_format = AV_PIX_FMT_NONE;
453
            got_buffer = 1;
454 455 456 457 458 459 460 461 462 463
        }
        coeff_data = s->plane[s->channel_num].subband[s->subband_num_actual];

        /* Lowpass coefficients */
        if (tag == 4 && data == 0xf0f && s->a_width && s->a_height) {
            int lowpass_height = s->plane[s->channel_num].band[0][0].height;
            int lowpass_width  = s->plane[s->channel_num].band[0][0].width;
            int lowpass_a_height = s->plane[s->channel_num].band[0][0].a_height;
            int lowpass_a_width  = s->plane[s->channel_num].band[0][0].a_width;

464 465 466 467 468 469
            if (!got_buffer) {
                av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
                ret = AVERROR(EINVAL);
                goto end;
            }

470 471 472 473 474 475 476
            if (lowpass_height > lowpass_a_height || lowpass_width > lowpass_a_width ||
                lowpass_a_width * lowpass_a_height * sizeof(int16_t) > bytestream2_get_bytes_left(&gb)) {
                av_log(avctx, AV_LOG_ERROR, "Too many lowpass coefficients\n");
                ret = AVERROR(EINVAL);
                goto end;
            }

477
            av_log(avctx, AV_LOG_DEBUG, "Start of lowpass coeffs component %d height:%d, width:%d\n", s->channel_num, lowpass_height, lowpass_width);
478 479 480 481 482 483 484
            for (i = 0; i < lowpass_height; i++) {
                for (j = 0; j < lowpass_width; j++)
                    coeff_data[j] = bytestream2_get_be16u(&gb);

                coeff_data += lowpass_width;
            }

485 486 487
            /* Align to mod-4 position to continue reading tags */
            bytestream2_seek(&gb, bytestream2_tell(&gb) & 3, SEEK_CUR);

488 489 490 491 492 493 494
            /* Copy last line of coefficients if odd height */
            if (lowpass_height & 1) {
                memcpy(&coeff_data[lowpass_height * lowpass_width],
                       &coeff_data[(lowpass_height - 1) * lowpass_width],
                       lowpass_width * sizeof(*coeff_data));
            }

495
            av_log(avctx, AV_LOG_DEBUG, "Lowpass coefficients %d\n", lowpass_width * lowpass_height);
496 497 498 499 500 501 502 503 504 505 506 507 508
        }

        if (tag == 55 && s->subband_num_actual != 255 && s->a_width && s->a_height) {
            int highpass_height = s->plane[s->channel_num].band[s->level][s->subband_num].height;
            int highpass_width  = s->plane[s->channel_num].band[s->level][s->subband_num].width;
            int highpass_a_width = s->plane[s->channel_num].band[s->level][s->subband_num].a_width;
            int highpass_a_height = s->plane[s->channel_num].band[s->level][s->subband_num].a_height;
            int highpass_stride = s->plane[s->channel_num].band[s->level][s->subband_num].stride;
            int expected = highpass_height * highpass_stride;
            int a_expected = highpass_a_height * highpass_a_width;
            int level, run, coeff;
            int count = 0, bytes;

509 510 511 512 513 514
            if (!got_buffer) {
                av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
                ret = AVERROR(EINVAL);
                goto end;
            }

515
            if (highpass_height > highpass_a_height || highpass_width > highpass_a_width || a_expected < expected) {
516
                av_log(avctx, AV_LOG_ERROR, "Too many highpass coefficients\n");
517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593
                ret = AVERROR(EINVAL);
                goto end;
            }

            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);

            init_get_bits(&s->gb, gb.buffer, bytestream2_get_bytes_left(&gb) * 8);
            {
                OPEN_READER(re, &s->gb);
                if (!s->codebook) {
                    while (1) {
                        UPDATE_CACHE(re, &s->gb);
                        GET_RL_VLC(level, run, re, &s->gb, s->table_9_rl_vlc,
                                   VLC_BITS, 3, 1);

                        /* escape */
                        if (level == 64)
                            break;

                        count += run;

                        if (count > expected)
                            break;

                        coeff = dequant_and_decompand(level, s->quantisation);
                        for (i = 0; i < run; i++)
                            *coeff_data++ = coeff;
                    }
                } else {
                    while (1) {
                        UPDATE_CACHE(re, &s->gb);
                        GET_RL_VLC(level, run, re, &s->gb, s->table_18_rl_vlc,
                                   VLC_BITS, 3, 1);

                        /* escape */
                        if (level == 255 && run == 2)
                            break;

                        count += run;

                        if (count > expected)
                            break;

                        coeff = dequant_and_decompand(level, s->quantisation);
                        for (i = 0; i < run; i++)
                            *coeff_data++ = coeff;
                    }
                }
                CLOSE_READER(re, &s->gb);
            }

            if (count > expected) {
                av_log(avctx, AV_LOG_ERROR, "Escape codeword not found, probably corrupt data\n");
                ret = AVERROR(EINVAL);
                goto end;
            }

            bytes = FFALIGN(FF_CEIL_RSHIFT(get_bits_count(&s->gb), 3), 4);
            if (bytes > bytestream2_get_bytes_left(&gb)) {
                av_log(avctx, AV_LOG_ERROR, "Bitstream overread error\n");
                ret = AVERROR(EINVAL);
                goto end;
            } else
                bytestream2_seek(&gb, bytes, SEEK_CUR);

            av_log(avctx, AV_LOG_DEBUG, "End subband coeffs %i extra %i\n", count, count - expected);
            s->codebook = 0;

            /* Copy last line of coefficients if odd height */
            if (highpass_height & 1) {
                memcpy(&coeff_data[highpass_height * highpass_stride],
                       &coeff_data[(highpass_height - 1) * highpass_stride],
                       highpass_stride * sizeof(*coeff_data));
            }
        }
    }

594 595
    if (!s->a_width || !s->a_height || s->a_format == AV_PIX_FMT_NONE ||
        s->coded_width || s->coded_height || s->coded_format != AV_PIX_FMT_NONE) {
596 597 598 599 600
        av_log(avctx, AV_LOG_ERROR, "Invalid dimensions\n");
        ret = AVERROR(EINVAL);
        goto end;
    }

601 602 603 604 605 606
    if (!got_buffer) {
        av_log(avctx, AV_LOG_ERROR, "No end of header tag found\n");
        ret = AVERROR(EINVAL);
        goto end;
    }

607 608
    planes = av_pix_fmt_count_planes(avctx->pix_fmt);
    for (plane = 0; plane < planes && !ret; plane++) {
609 610 611 612
        /* level 1 */
        int lowpass_height  = s->plane[plane].band[0][0].height;
        int lowpass_width   = s->plane[plane].band[0][0].width;
        int highpass_stride = s->plane[plane].band[0][1].stride;
613
        int act_plane = plane == 1 ? 2 : plane == 2 ? 1 : plane;
614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655
        int16_t *low, *high, *output, *dst;

        if (lowpass_height > s->plane[plane].band[0][0].a_height || lowpass_width > s->plane[plane].band[0][0].a_width ||
            !highpass_stride || s->plane[plane].band[0][1].width > s->plane[plane].band[0][1].a_width) {
            av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
            ret = AVERROR(EINVAL);
            goto end;
        }

        av_log(avctx, AV_LOG_DEBUG, "Decoding level 1 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);

        low    = s->plane[plane].subband[0];
        high   = s->plane[plane].subband[2];
        output = s->plane[plane].l_h[0];
        for (i = 0; i < lowpass_width; i++) {
            vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
            low++;
            high++;
            output++;
        }

        low    = s->plane[plane].subband[1];
        high   = s->plane[plane].subband[3];
        output = s->plane[plane].l_h[1];

        for (i = 0; i < lowpass_width; i++) {
            // note the stride of "low" is highpass_stride
            vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
            low++;
            high++;
            output++;
        }

        low    = s->plane[plane].l_h[0];
        high   = s->plane[plane].l_h[1];
        output = s->plane[plane].subband[0];
        for (i = 0; i < lowpass_height * 2; i++) {
            horiz_filter(output, low, high, lowpass_width);
            low    += lowpass_width;
            high   += lowpass_width;
            output += lowpass_width * 2;
        }
656
        if (s->bpc == 12) {
657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797
            output = s->plane[plane].subband[0];
            for (i = 0; i < lowpass_height * 2; i++) {
                for (j = 0; j < lowpass_width * 2; j++)
                    output[j] <<= 2;

                output += lowpass_width * 2;
            }
        }

        /* level 2 */
        lowpass_height  = s->plane[plane].band[1][1].height;
        lowpass_width   = s->plane[plane].band[1][1].width;
        highpass_stride = s->plane[plane].band[1][1].stride;

        if (lowpass_height > s->plane[plane].band[1][1].a_height || lowpass_width > s->plane[plane].band[1][1].a_width ||
            !highpass_stride || s->plane[plane].band[1][1].width > s->plane[plane].band[1][1].a_width) {
            av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
            ret = AVERROR(EINVAL);
            goto end;
        }

        av_log(avctx, AV_LOG_DEBUG, "Level 2 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);

        low    = s->plane[plane].subband[0];
        high   = s->plane[plane].subband[5];
        output = s->plane[plane].l_h[3];
        for (i = 0; i < lowpass_width; i++) {
            vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
            low++;
            high++;
            output++;
        }

        low    = s->plane[plane].subband[4];
        high   = s->plane[plane].subband[6];
        output = s->plane[plane].l_h[4];
        for (i = 0; i < lowpass_width; i++) {
            vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
            low++;
            high++;
            output++;
        }

        low    = s->plane[plane].l_h[3];
        high   = s->plane[plane].l_h[4];
        output = s->plane[plane].subband[0];
        for (i = 0; i < lowpass_height * 2; i++) {
            horiz_filter(output, low, high, lowpass_width);
            low    += lowpass_width;
            high   += lowpass_width;
            output += lowpass_width * 2;
        }

        output = s->plane[plane].subband[0];
        for (i = 0; i < lowpass_height * 2; i++) {
            for (j = 0; j < lowpass_width * 2; j++)
                output[j] <<= 2;

            output += lowpass_width * 2;
        }

        /* level 3 */
        lowpass_height  = s->plane[plane].band[2][1].height;
        lowpass_width   = s->plane[plane].band[2][1].width;
        highpass_stride = s->plane[plane].band[2][1].stride;

        if (lowpass_height > s->plane[plane].band[2][1].a_height || lowpass_width > s->plane[plane].band[2][1].a_width ||
            !highpass_stride || s->plane[plane].band[2][1].width > s->plane[plane].band[2][1].a_width) {
            av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
            ret = AVERROR(EINVAL);
            goto end;
        }

        av_log(avctx, AV_LOG_DEBUG, "Level 3 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);

        low    = s->plane[plane].subband[0];
        high   = s->plane[plane].subband[8];
        output = s->plane[plane].l_h[6];
        for (i = 0; i < lowpass_width; i++) {
            vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
            low++;
            high++;
            output++;
        }

        low    = s->plane[plane].subband[7];
        high   = s->plane[plane].subband[9];
        output = s->plane[plane].l_h[7];
        for (i = 0; i < lowpass_width; i++) {
            vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
            low++;
            high++;
            output++;
        }

        dst = (int16_t *)pic->data[act_plane];
        low  = s->plane[plane].l_h[6];
        high = s->plane[plane].l_h[7];
        for (i = 0; i < lowpass_height * 2; i++) {
            horiz_filter_clip(dst, low, high, lowpass_width, s->bpc);
            low  += lowpass_width;
            high += lowpass_width;
            dst  += pic->linesize[act_plane] / 2;
        }
    }


end:
    if (ret < 0)
        return ret;

    *got_frame = 1;
    return avpkt->size;
}

static av_cold int cfhd_close_decoder(AVCodecContext *avctx)
{
    CFHDContext *s = avctx->priv_data;

    free_buffers(avctx);

    if (!avctx->internal->is_copy) {
        ff_free_vlc(&s->vlc_9);
        ff_free_vlc(&s->vlc_18);
    }

    return 0;
}

AVCodec ff_cfhd_decoder = {
    .name           = "cfhd",
    .long_name      = NULL_IF_CONFIG_SMALL("Cineform HD"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_CFHD,
    .priv_data_size = sizeof(CFHDContext),
    .init           = cfhd_decode_init,
    .close          = cfhd_close_decoder,
    .decode         = cfhd_decode,
    .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
    .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
};