dvdata.h 28.6 KB
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/*
 * Constants for DV codec
 * Copyright (c) 2002 Fabrice Bellard.
 *
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 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * 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
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */

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/**
 * @file dvdata.h
 * Constants for DV codec.
 */
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#ifndef AVCODEC_DVDATA_H
#define AVCODEC_DVDATA_H
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#include "libavutil/rational.h"
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#include "avcodec.h"

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typedef struct DVwork_chunk {
    uint16_t  buf_offset;
    uint16_t  mb_coordinates[5];
} DVwork_chunk;

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/*
 * DVprofile is used to express the differences between various
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 * DV flavors. For now it's primarily used for differentiating
 * 525/60 and 625/50, but the plans are to use it for various
 * DV specs as well (e.g. SMPTE314M vs. IEC 61834).
 */
typedef struct DVprofile {
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    int              dsf;                   /* value of the dsf in the DV header */
    int              video_stype;           /* stype for VAUX source pack */
    int              frame_size;            /* total size of one frame in bytes */
    int              difseg_size;           /* number of DIF segments per DIF channel */
    int              n_difchan;             /* number of DIF channels per frame */
    AVRational       time_base;             /* 1/framerate */
    int              ltc_divisor;           /* FPS from the LTS standpoint */
    int              height;                /* picture height in pixels */
    int              width;                 /* picture width in pixels */
    AVRational       sar[2];                /* sample aspect ratios for 4:3 and 16:9 */
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    DVwork_chunk    *work_chunks;           /* each thread gets its own chunk of frame to work on */
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    uint32_t        *idct_factor;           /* set of iDCT factor tables */
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    enum PixelFormat pix_fmt;               /* picture pixel format */
    int              bpm;                   /* blocks per macroblock */
    const uint8_t   *block_sizes;           /* AC block sizes, in bits */
    int              audio_stride;          /* size of audio_shuffle table */
    int              audio_min_samples[3];  /* min amount of audio samples */
                                            /* for 48kHz, 44.1kHz and 32kHz */
    int              audio_samples_dist[5]; /* how many samples are supposed to be */
                                            /* in each frame in a 5 frames window */
    const uint8_t  (*audio_shuffle)[9];     /* PCM shuffling table */
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} DVprofile;

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#define NB_DV_VLC 409

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/*
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 * There's a catch about the following three tables: the mapping they establish
 * between (run, level) and vlc is not 1-1. So you have to watch out for that
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 * when building misc. tables. E.g. (1, 0) can be either 0x7cf or 0x1f82.
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 */
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static const uint16_t dv_vlc_bits[409] = {
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 0x0000, 0x0002, 0x0007, 0x0008, 0x0009, 0x0014, 0x0015, 0x0016,
 0x0017, 0x0030, 0x0031, 0x0032, 0x0033, 0x0068, 0x0069, 0x006a,
 0x006b, 0x006c, 0x006d, 0x006e, 0x006f, 0x00e0, 0x00e1, 0x00e2,
 0x00e3, 0x00e4, 0x00e5, 0x00e6, 0x00e7, 0x00e8, 0x00e9, 0x00ea,
 0x00eb, 0x00ec, 0x00ed, 0x00ee, 0x00ef, 0x01e0, 0x01e1, 0x01e2,
 0x01e3, 0x01e4, 0x01e5, 0x01e6, 0x01e7, 0x01e8, 0x01e9, 0x01ea,
 0x01eb, 0x01ec, 0x01ed, 0x01ee, 0x01ef, 0x03e0, 0x03e1, 0x03e2,
 0x03e3, 0x03e4, 0x03e5, 0x03e6, 0x07ce, 0x07cf, 0x07d0, 0x07d1,
 0x07d2, 0x07d3, 0x07d4, 0x07d5, 0x0fac, 0x0fad, 0x0fae, 0x0faf,
 0x0fb0, 0x0fb1, 0x0fb2, 0x0fb3, 0x0fb4, 0x0fb5, 0x0fb6, 0x0fb7,
 0x0fb8, 0x0fb9, 0x0fba, 0x0fbb, 0x0fbc, 0x0fbd, 0x0fbe, 0x0fbf,
 0x1f80, 0x1f81, 0x1f82, 0x1f83, 0x1f84, 0x1f85, 0x1f86, 0x1f87,
 0x1f88, 0x1f89, 0x1f8a, 0x1f8b, 0x1f8c, 0x1f8d, 0x1f8e, 0x1f8f,
 0x1f90, 0x1f91, 0x1f92, 0x1f93, 0x1f94, 0x1f95, 0x1f96, 0x1f97,
 0x1f98, 0x1f99, 0x1f9a, 0x1f9b, 0x1f9c, 0x1f9d, 0x1f9e, 0x1f9f,
 0x1fa0, 0x1fa1, 0x1fa2, 0x1fa3, 0x1fa4, 0x1fa5, 0x1fa6, 0x1fa7,
 0x1fa8, 0x1fa9, 0x1faa, 0x1fab, 0x1fac, 0x1fad, 0x1fae, 0x1faf,
 0x1fb0, 0x1fb1, 0x1fb2, 0x1fb3, 0x1fb4, 0x1fb5, 0x1fb6, 0x1fb7,
 0x1fb8, 0x1fb9, 0x1fba, 0x1fbb, 0x1fbc, 0x1fbd, 0x1fbe, 0x1fbf,
 0x7f00, 0x7f01, 0x7f02, 0x7f03, 0x7f04, 0x7f05, 0x7f06, 0x7f07,
 0x7f08, 0x7f09, 0x7f0a, 0x7f0b, 0x7f0c, 0x7f0d, 0x7f0e, 0x7f0f,
 0x7f10, 0x7f11, 0x7f12, 0x7f13, 0x7f14, 0x7f15, 0x7f16, 0x7f17,
 0x7f18, 0x7f19, 0x7f1a, 0x7f1b, 0x7f1c, 0x7f1d, 0x7f1e, 0x7f1f,
 0x7f20, 0x7f21, 0x7f22, 0x7f23, 0x7f24, 0x7f25, 0x7f26, 0x7f27,
 0x7f28, 0x7f29, 0x7f2a, 0x7f2b, 0x7f2c, 0x7f2d, 0x7f2e, 0x7f2f,
 0x7f30, 0x7f31, 0x7f32, 0x7f33, 0x7f34, 0x7f35, 0x7f36, 0x7f37,
 0x7f38, 0x7f39, 0x7f3a, 0x7f3b, 0x7f3c, 0x7f3d, 0x7f3e, 0x7f3f,
 0x7f40, 0x7f41, 0x7f42, 0x7f43, 0x7f44, 0x7f45, 0x7f46, 0x7f47,
 0x7f48, 0x7f49, 0x7f4a, 0x7f4b, 0x7f4c, 0x7f4d, 0x7f4e, 0x7f4f,
 0x7f50, 0x7f51, 0x7f52, 0x7f53, 0x7f54, 0x7f55, 0x7f56, 0x7f57,
 0x7f58, 0x7f59, 0x7f5a, 0x7f5b, 0x7f5c, 0x7f5d, 0x7f5e, 0x7f5f,
 0x7f60, 0x7f61, 0x7f62, 0x7f63, 0x7f64, 0x7f65, 0x7f66, 0x7f67,
 0x7f68, 0x7f69, 0x7f6a, 0x7f6b, 0x7f6c, 0x7f6d, 0x7f6e, 0x7f6f,
 0x7f70, 0x7f71, 0x7f72, 0x7f73, 0x7f74, 0x7f75, 0x7f76, 0x7f77,
 0x7f78, 0x7f79, 0x7f7a, 0x7f7b, 0x7f7c, 0x7f7d, 0x7f7e, 0x7f7f,
 0x7f80, 0x7f81, 0x7f82, 0x7f83, 0x7f84, 0x7f85, 0x7f86, 0x7f87,
 0x7f88, 0x7f89, 0x7f8a, 0x7f8b, 0x7f8c, 0x7f8d, 0x7f8e, 0x7f8f,
 0x7f90, 0x7f91, 0x7f92, 0x7f93, 0x7f94, 0x7f95, 0x7f96, 0x7f97,
 0x7f98, 0x7f99, 0x7f9a, 0x7f9b, 0x7f9c, 0x7f9d, 0x7f9e, 0x7f9f,
 0x7fa0, 0x7fa1, 0x7fa2, 0x7fa3, 0x7fa4, 0x7fa5, 0x7fa6, 0x7fa7,
 0x7fa8, 0x7fa9, 0x7faa, 0x7fab, 0x7fac, 0x7fad, 0x7fae, 0x7faf,
 0x7fb0, 0x7fb1, 0x7fb2, 0x7fb3, 0x7fb4, 0x7fb5, 0x7fb6, 0x7fb7,
 0x7fb8, 0x7fb9, 0x7fba, 0x7fbb, 0x7fbc, 0x7fbd, 0x7fbe, 0x7fbf,
 0x7fc0, 0x7fc1, 0x7fc2, 0x7fc3, 0x7fc4, 0x7fc5, 0x7fc6, 0x7fc7,
 0x7fc8, 0x7fc9, 0x7fca, 0x7fcb, 0x7fcc, 0x7fcd, 0x7fce, 0x7fcf,
 0x7fd0, 0x7fd1, 0x7fd2, 0x7fd3, 0x7fd4, 0x7fd5, 0x7fd6, 0x7fd7,
 0x7fd8, 0x7fd9, 0x7fda, 0x7fdb, 0x7fdc, 0x7fdd, 0x7fde, 0x7fdf,
 0x7fe0, 0x7fe1, 0x7fe2, 0x7fe3, 0x7fe4, 0x7fe5, 0x7fe6, 0x7fe7,
 0x7fe8, 0x7fe9, 0x7fea, 0x7feb, 0x7fec, 0x7fed, 0x7fee, 0x7fef,
 0x7ff0, 0x7ff1, 0x7ff2, 0x7ff3, 0x7ff4, 0x7ff5, 0x7ff6, 0x7ff7,
 0x7ff8, 0x7ff9, 0x7ffa, 0x7ffb, 0x7ffc, 0x7ffd, 0x7ffe, 0x7fff,
 0x0006,
};

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static const uint8_t dv_vlc_len[409] = {
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  2,  3,  4,  4,  4,  5,  5,  5,
  5,  6,  6,  6,  6,  7,  7,  7,
  7,  7,  7,  7,  7,  8,  8,  8,
  8,  8,  8,  8,  8,  8,  8,  8,
  8,  8,  8,  8,  8,  9,  9,  9,
  9,  9,  9,  9,  9,  9,  9,  9,
  9,  9,  9,  9,  9, 10, 10, 10,
 10, 10, 10, 10, 11, 11, 11, 11,
 11, 11, 11, 11, 12, 12, 12, 12,
 12, 12, 12, 12, 12, 12, 12, 12,
 12, 12, 12, 12, 12, 12, 12, 12,
 13, 13, 13, 13, 13, 13, 13, 13,
 13, 13, 13, 13, 13, 13, 13, 13,
 13, 13, 13, 13, 13, 13, 13, 13,
 13, 13, 13, 13, 13, 13, 13, 13,
 13, 13, 13, 13, 13, 13, 13, 13,
 13, 13, 13, 13, 13, 13, 13, 13,
 13, 13, 13, 13, 13, 13, 13, 13,
 13, 13, 13, 13, 13, 13, 13, 13,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
 15, 15, 15, 15, 15, 15, 15, 15,
  4,
};

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static const uint8_t dv_vlc_run[409] = {
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  0,  0,  1,  0,  0,  2,  1,  0,
  0,  3,  4,  0,  0,  5,  6,  2,
  1,  1,  0,  0,  0,  7,  8,  9,
 10,  3,  4,  2,  1,  1,  1,  0,
  0,  0,  0,  0,  0, 11, 12, 13,
 14,  5,  6,  3,  4,  2,  2,  1,
  0,  0,  0,  0,  0,  5,  3,  3,
  2,  1,  1,  1,  0,  1,  6,  4,
  3,  1,  1,  1,  2,  3,  4,  5,
  7,  8,  9, 10,  7,  8,  4,  3,
  2,  2,  2,  2,  2,  1,  1,  1,
  0,  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,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
  0,  0,  0,  0,  0,  0,  0,  0,
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127,
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};

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static const uint8_t dv_vlc_level[409] = {
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   1,   2,   1,   3,   4,   1,   2,   5,
   6,   1,   1,   7,   8,   1,   1,   2,
   3,   4,   9,  10,  11,   1,   1,   1,
   1,   2,   2,   3,   5,   6,   7,  12,
  13,  14,  15,  16,  17,   1,   1,   1,
   1,   2,   2,   3,   3,   4,   5,   8,
  18,  19,  20,  21,  22,   3,   4,   5,
   6,   9,  10,  11,   0,   0,   3,   4,
   6,  12,  13,  14,   0,   0,   0,   0,
   2,   2,   2,   2,   3,   3,   5,   7,
   7,   8,   9,  10,  11,  15,  16,  17,
   0,   0,   0,   0,   0,   0,   0,   0,
   0,   0,   0,   0,   0,   0,   0,   0,
   0,   0,   0,   0,   0,   0,   0,   0,
   0,   0,   0,   0,   0,   0,   0,   0,
   0,   0,   0,   0,   0,   0,   0,   0,
   0,   0,   0,   0,   0,   0,   0,   0,
   0,   0,   0,   0,   0,   0,   0,   0,
   0,   0,   0,   0,   0,   0,   0,   0,
   0,   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,
273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291
 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, 140, 141, 142, 143,
 144, 145, 146, 147, 148, 149, 150, 151,
 152, 153, 154, 155, 156, 157, 158, 159,
 160, 161, 162, 163, 164, 165, 166, 167,
 168, 169, 170, 171, 172, 173, 174, 175,
 176, 177, 178, 179, 180, 181, 182, 183,
 184, 185, 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, 222, 223,
 224, 225, 226, 227, 228, 229, 230, 231,
 232, 233, 234, 235, 236, 237, 238, 239,
 240, 241, 242, 243, 244, 245, 246, 247,
 248, 249, 250, 251, 252, 253, 254, 255,
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   0,
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};

/* unquant tables (not used directly) */
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static const uint8_t dv_quant_shifts[22][4] = {
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  { 3,3,4,4 },
  { 3,3,4,4 },
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  { 2,3,3,4 },
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  { 2,3,3,4 },
  { 2,2,3,3 },
  { 2,2,3,3 },
  { 1,2,2,3 },
  { 1,2,2,3 },
  { 1,1,2,2 },
  { 1,1,2,2 },
  { 0,1,1,2 },
  { 0,1,1,2 },
  { 0,0,1,1 },
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  { 0,0,1,1 },
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  { 0,0,0,1 },
  { 0,0,0,0 },
  { 0,0,0,0 },
  { 0,0,0,0 },
  { 0,0,0,0 },
  { 0,0,0,0 },
  { 0,0,0,0 },
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  { 0,0,0,0 },
};

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static const uint8_t dv_quant_offset[4] = { 6,  3,  0,  1 };
static const uint8_t dv_quant_areas[4]  = { 6, 21, 43, 64 };
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/* quantization quanta by QNO for DV100 */
static const uint8_t dv100_qstep[16] = {
    1, /* QNO = 0 and 1 both have no quantization */
    1,
    2, 3, 4, 5, 6, 7, 8, 16, 18, 20, 22, 24, 28, 52
};

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/* DV25/50 DCT coefficient weights and inverse weights */
/* created by dvtables.py */
static const int dv_weight_bits = 18;
static const int dv_weight_88[64] = {
 131072, 257107, 257107, 242189, 252167, 242189, 235923, 237536,
 237536, 235923, 229376, 231390, 223754, 231390, 229376, 222935,
 224969, 217965, 217965, 224969, 222935, 200636, 218652, 211916,
 212325, 211916, 218652, 200636, 188995, 196781, 205965, 206433,
 206433, 205965, 196781, 188995, 185364, 185364, 200636, 200704,
 200636, 185364, 185364, 174609, 180568, 195068, 195068, 180568,
 174609, 170091, 175557, 189591, 175557, 170091, 165371, 170627,
 170627, 165371, 160727, 153560, 160727, 144651, 144651, 136258,
};
static const int dv_weight_248[64] = {
 131072, 242189, 257107, 237536, 229376, 200636, 242189, 223754,
 224969, 196781, 262144, 242189, 229376, 200636, 257107, 237536,
 211916, 185364, 235923, 217965, 229376, 211916, 206433, 180568,
 242189, 223754, 224969, 196781, 211916, 185364, 235923, 217965,
 200704, 175557, 222935, 205965, 200636, 185364, 195068, 170627,
 229376, 211916, 206433, 180568, 200704, 175557, 222935, 205965,
 175557, 153560, 188995, 174609, 165371, 144651, 200636, 185364,
 195068, 170627, 175557, 153560, 188995, 174609, 165371, 144651,
};
static const int dv_iweight_bits = 14;
static const int dv_iweight_88[64] = {
 32768, 16710, 16710, 17735, 17015, 17735, 18197, 18079,
 18079, 18197, 18725, 18559, 19196, 18559, 18725, 19284,
 19108, 19692, 19692, 19108, 19284, 21400, 19645, 20262,
 20214, 20262, 19645, 21400, 22733, 21845, 20867, 20815,
 20815, 20867, 21845, 22733, 23173, 23173, 21400, 21400,
 21400, 23173, 23173, 24600, 23764, 22017, 22017, 23764,
 24600, 25267, 24457, 22672, 24457, 25267, 25971, 25191,
 25191, 25971, 26715, 27962, 26715, 29642, 29642, 31536,
};
static const int dv_iweight_248[64] = {
 32768, 17735, 16710, 18079, 18725, 21400, 17735, 19196,
 19108, 21845, 16384, 17735, 18725, 21400, 16710, 18079,
 20262, 23173, 18197, 19692, 18725, 20262, 20815, 23764,
 17735, 19196, 19108, 21845, 20262, 23173, 18197, 19692,
 21400, 24457, 19284, 20867, 21400, 23173, 22017, 25191,
 18725, 20262, 20815, 23764, 21400, 24457, 19284, 20867,
 24457, 27962, 22733, 24600, 25971, 29642, 21400, 23173,
 22017, 25191, 24457, 27962, 22733, 24600, 25971, 29642,
};

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/**
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 * The "inverse" DV100 weights are actually just the spec weights (zig-zagged).
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 */
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static const int dv_iweight_1080_y[64] = {
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    128,  16,  16,  17,  17,  17,  18,  18,
     18,  18,  18,  18,  19,  18,  18,  19,
     19,  19,  19,  19,  19,  42,  38,  40,
     40,  40,  38,  42,  44,  43,  41,  41,
     41,  41,  43,  44,  45,  45,  42,  42,
     42,  45,  45,  48,  46,  43,  43,  46,
     48,  49,  48,  44,  48,  49, 101,  98,
     98, 101, 104, 109, 104, 116, 116, 123,
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};
static const int dv_iweight_1080_c[64] = {
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    128,  16,  16,  17,  17,  17,  25,  25,
     25,  25,  26,  25,  26,  25,  26,  26,
     26,  27,  27,  26,  26,  42,  38,  40,
     40,  40,  38,  42,  44,  43,  41,  41,
     41,  41,  43,  44,  91,  91,  84,  84,
     84,  91,  91,  96,  93,  86,  86,  93,
     96, 197, 191, 177, 191, 197, 203, 197,
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    197, 203, 209, 219, 209, 232, 232, 246,
};
static const int dv_iweight_720_y[64] = {
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    128,  16,  16,  17,  17,  17,  18,  18,
     18,  18,  18,  18,  19,  18,  18,  19,
     19,  19,  19,  19,  19,  42,  38,  40,
     40,  40,  38,  42,  44,  43,  41,  41,
     41,  41,  43,  44,  68,  68,  63,  63,
     63,  68,  68,  96,  92,  86,  86,  92,
     96,  98,  96,  88,  96,  98, 202, 196,
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    196, 202, 208, 218, 208, 232, 232, 246,
};
static const int dv_iweight_720_c[64] = {
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    128,  24,  24,  26,  26,  26,  36,  36,
     36,  36,  36,  36,  38,  36,  36,  38,
     38,  38,  38,  38,  38,  84,  76,  80,
     80,  80,  76,  84,  88,  86,  82,  82,
     82,  82,  86,  88, 182, 182, 168, 168,
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    168, 182, 182, 192, 186, 192, 172, 186,
    192, 394, 382, 354, 382, 394, 406, 394,
    394, 406, 418, 438, 418, 464, 464, 492,
};

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static const uint8_t dv_audio_shuffle525[10][9] = {
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  {  0, 30, 60, 20, 50, 80, 10, 40, 70 }, /* 1st channel */
  {  6, 36, 66, 26, 56, 86, 16, 46, 76 },
  { 12, 42, 72,  2, 32, 62, 22, 52, 82 },
  { 18, 48, 78,  8, 38, 68, 28, 58, 88 },
  { 24, 54, 84, 14, 44, 74,  4, 34, 64 },
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  {  1, 31, 61, 21, 51, 81, 11, 41, 71 }, /* 2nd channel */
  {  7, 37, 67, 27, 57, 87, 17, 47, 77 },
  { 13, 43, 73,  3, 33, 63, 23, 53, 83 },
  { 19, 49, 79,  9, 39, 69, 29, 59, 89 },
  { 25, 55, 85, 15, 45, 75,  5, 35, 65 },
};

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static const uint8_t dv_audio_shuffle625[12][9] = {
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  {   0,  36,  72,  26,  62,  98,  16,  52,  88}, /* 1st channel */
  {   6,  42,  78,  32,  68, 104,  22,  58,  94},
  {  12,  48,  84,   2,  38,  74,  28,  64, 100},
  {  18,  54,  90,   8,  44,  80,  34,  70, 106},
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  {  24,  60,  96,  14,  50,  86,   4,  40,  76},
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  {  30,  66, 102,  20,  56,  92,  10,  46,  82},
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  {   1,  37,  73,  27,  63,  99,  17,  53,  89}, /* 2nd channel */
  {   7,  43,  79,  33,  69, 105,  23,  59,  95},
  {  13,  49,  85,   3,  39,  75,  29,  65, 101},
  {  19,  55,  91,   9,  45,  81,  35,  71, 107},
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  {  25,  61,  97,  15,  51,  87,   5,  41,  77},
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  {  31,  67, 103,  21,  57,  93,  11,  47,  83},
};

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static const av_unused int dv_audio_frequency[3] = {
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    48000, 44100, 32000,
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};
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/* macroblock bit budgets */
static const uint8_t block_sizes_dv2550[8] = {
    112, 112, 112, 112, 80, 80, 0, 0,
};

static const uint8_t block_sizes_dv100[8] = {
    80, 80, 80, 80, 80, 80, 64, 64,
};

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static DVwork_chunk work_chunks_dv25pal   [1*12*27];
static DVwork_chunk work_chunks_dv25pal411[1*12*27];
static DVwork_chunk work_chunks_dv25ntsc  [1*10*27];
static DVwork_chunk work_chunks_dv50pal   [2*12*27];
static DVwork_chunk work_chunks_dv50ntsc  [2*10*27];
static DVwork_chunk work_chunks_dv100palp [2*12*27];
static DVwork_chunk work_chunks_dv100ntscp[2*10*27];
static DVwork_chunk work_chunks_dv100pali [4*12*27];
static DVwork_chunk work_chunks_dv100ntsci[4*10*27];
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static uint32_t dv_idct_factor_sd    [2*2*22*64];
static uint32_t dv_idct_factor_hd1080[2*4*16*64];
static uint32_t dv_idct_factor_hd720 [2*4*16*64];

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static const DVprofile dv_profiles[] = {
    { .dsf = 0,
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      .video_stype = 0x0,
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      .frame_size = 120000,        /* IEC 61834, SMPTE-314M - 525/60 (NTSC) */
      .difseg_size = 10,
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      .n_difchan = 1,
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      .time_base = { 1001, 30000 },
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      .ltc_divisor = 30,
      .height = 480,
      .width = 720,
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      .sar = {{10, 11}, {40, 33}},
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      .work_chunks = &work_chunks_dv25ntsc[0],
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      .idct_factor = &dv_idct_factor_sd[0],
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      .pix_fmt = PIX_FMT_YUV411P,
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      .bpm = 6,
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      .block_sizes = block_sizes_dv2550,
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      .audio_stride = 90,
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      .audio_min_samples  = { 1580, 1452, 1053 }, /* for 48, 44.1 and 32kHz */
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      .audio_samples_dist = { 1600, 1602, 1602, 1602, 1602 }, /* per SMPTE-314M */
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      .audio_shuffle = dv_audio_shuffle525,
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    },
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    { .dsf = 1,
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      .video_stype = 0x0,
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      .frame_size = 144000,        /* IEC 61834 - 625/50 (PAL) */
      .difseg_size = 12,
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      .n_difchan = 1,
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      .time_base = { 1, 25 },
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      .ltc_divisor = 25,
      .height = 576,
      .width = 720,
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      .sar = {{59, 54}, {118, 81}},
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      .work_chunks = &work_chunks_dv25pal[0],
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      .idct_factor = &dv_idct_factor_sd[0],
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      .pix_fmt = PIX_FMT_YUV420P,
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      .bpm = 6,
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      .block_sizes = block_sizes_dv2550,
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      .audio_stride = 108,
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      .audio_min_samples  = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32kHz */
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      .audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 },
      .audio_shuffle = dv_audio_shuffle625,
    },
    { .dsf = 1,
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      .video_stype = 0x0,
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      .frame_size = 144000,        /* SMPTE-314M - 625/50 (PAL) */
      .difseg_size = 12,
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      .n_difchan = 1,
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      .time_base = { 1, 25 },
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      .ltc_divisor = 25,
      .height = 576,
      .width = 720,
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      .sar = {{59, 54}, {118, 81}},
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      .work_chunks = &work_chunks_dv25pal411[0],
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      .idct_factor = &dv_idct_factor_sd[0],
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      .pix_fmt = PIX_FMT_YUV411P,
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      .bpm = 6,
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      .block_sizes = block_sizes_dv2550,
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      .audio_stride = 108,
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      .audio_min_samples  = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32kHz */
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      .audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 },
      .audio_shuffle = dv_audio_shuffle625,
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    },
    { .dsf = 0,
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      .video_stype = 0x4,
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      .frame_size = 240000,        /* SMPTE-314M - 525/60 (NTSC) 50 Mbps */
      .difseg_size = 10,           /* also known as "DVCPRO50" */
      .n_difchan = 2,
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      .time_base = { 1001, 30000 },
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      .ltc_divisor = 30,
      .height = 480,
      .width = 720,
      .sar = {{10, 11}, {40, 33}},
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      .work_chunks = &work_chunks_dv50ntsc[0],
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      .idct_factor = &dv_idct_factor_sd[0],
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      .pix_fmt = PIX_FMT_YUV422P,
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      .bpm = 6,
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      .block_sizes = block_sizes_dv2550,
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      .audio_stride = 90,
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      .audio_min_samples  = { 1580, 1452, 1053 }, /* for 48, 44.1 and 32kHz */
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      .audio_samples_dist = { 1600, 1602, 1602, 1602, 1602 }, /* per SMPTE-314M */
      .audio_shuffle = dv_audio_shuffle525,
    },
    { .dsf = 1,
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      .video_stype = 0x4,
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      .frame_size = 288000,        /* SMPTE-314M - 625/50 (PAL) 50 Mbps */
      .difseg_size = 12,           /* also known as "DVCPRO50" */
      .n_difchan = 2,
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      .time_base = { 1, 25 },
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      .ltc_divisor = 25,
      .height = 576,
      .width = 720,
      .sar = {{59, 54}, {118, 81}},
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      .work_chunks = &work_chunks_dv50pal[0],
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      .idct_factor = &dv_idct_factor_sd[0],
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      .pix_fmt = PIX_FMT_YUV422P,
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      .bpm = 6,
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      .block_sizes = block_sizes_dv2550,
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      .audio_stride = 108,
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      .audio_min_samples  = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32kHz */
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      .audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 },
      .audio_shuffle = dv_audio_shuffle625,
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    },
    { .dsf = 0,
      .video_stype = 0x14,
      .frame_size = 480000,        /* SMPTE-370M - 1080i60 100 Mbps */
      .difseg_size = 10,           /* also known as "DVCPRO HD" */
      .n_difchan = 4,
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      .time_base = { 1001, 30000 },
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      .ltc_divisor = 30,
      .height = 1080,
      .width = 1280,
      .sar = {{1, 1}, {1, 1}},
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      .work_chunks = &work_chunks_dv100ntsci[0],
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      .idct_factor = &dv_idct_factor_hd1080[0],
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      .pix_fmt = PIX_FMT_YUV422P,
      .bpm = 8,
      .block_sizes = block_sizes_dv100,
      .audio_stride = 90,
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      .audio_min_samples  = { 1580, 1452, 1053 }, /* for 48, 44.1 and 32kHz */
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      .audio_samples_dist = { 1600, 1602, 1602, 1602, 1602 }, /* per SMPTE-314M */
      .audio_shuffle = dv_audio_shuffle525,
    },
    { .dsf = 1,
      .video_stype = 0x14,
      .frame_size = 576000,        /* SMPTE-370M - 1080i50 100 Mbps */
      .difseg_size = 12,           /* also known as "DVCPRO HD" */
      .n_difchan = 4,
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      .time_base = { 1, 25 },
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      .ltc_divisor = 25,
      .height = 1080,
      .width = 1440,
      .sar = {{1, 1}, {1, 1}},
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      .work_chunks = &work_chunks_dv100pali[0],
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      .idct_factor = &dv_idct_factor_hd1080[0],
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      .pix_fmt = PIX_FMT_YUV422P,
      .bpm = 8,
      .block_sizes = block_sizes_dv100,
      .audio_stride = 108,
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      .audio_min_samples  = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32kHz */
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      .audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 },
      .audio_shuffle = dv_audio_shuffle625,
    },
    { .dsf = 0,
      .video_stype = 0x18,
      .frame_size = 240000,        /* SMPTE-370M - 720p60 100 Mbps */
      .difseg_size = 10,           /* also known as "DVCPRO HD" */
      .n_difchan = 2,
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      .time_base = { 1001, 60000 },
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      .ltc_divisor = 60,
      .height = 720,
      .width = 960,
      .sar = {{1, 1}, {1, 1}},
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      .work_chunks = &work_chunks_dv100ntscp[0],
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      .idct_factor = &dv_idct_factor_hd720[0],
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      .pix_fmt = PIX_FMT_YUV422P,
      .bpm = 8,
      .block_sizes = block_sizes_dv100,
      .audio_stride = 90,
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      .audio_min_samples  = { 1580, 1452, 1053 }, /* for 48, 44.1 and 32kHz */
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      .audio_samples_dist = { 1600, 1602, 1602, 1602, 1602 }, /* per SMPTE-314M */
      .audio_shuffle = dv_audio_shuffle525,
    },
    { .dsf = 1,
      .video_stype = 0x18,
      .frame_size = 288000,        /* SMPTE-370M - 720p50 100 Mbps */
      .difseg_size = 12,           /* also known as "DVCPRO HD" */
      .n_difchan = 2,
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      .time_base = { 1, 50 },
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      .ltc_divisor = 50,
      .height = 720,
      .width = 960,
      .sar = {{1, 1}, {1, 1}},
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      .work_chunks = &work_chunks_dv100palp[0],
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      .idct_factor = &dv_idct_factor_hd720[0],
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      .pix_fmt = PIX_FMT_YUV422P,
      .bpm = 8,
      .block_sizes = block_sizes_dv100,
      .audio_stride = 90,
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      .audio_min_samples  = { 1580, 1452, 1053 }, /* for 48, 44.1 and 32kHz */
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      .audio_samples_dist = { 1600, 1602, 1602, 1602, 1602 }, /* per SMPTE-314M */
      .audio_shuffle = dv_audio_shuffle525,
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    }
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};
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enum dv_section_type {
     dv_sect_header  = 0x1f,
     dv_sect_subcode = 0x3f,
     dv_sect_vaux    = 0x56,
     dv_sect_audio   = 0x76,
     dv_sect_video   = 0x96,
};

enum dv_pack_type {
     dv_header525     = 0x3f, /* see dv_write_pack for important details on */
     dv_header625     = 0xbf, /* these two packs */
     dv_timecode      = 0x13,
     dv_audio_source  = 0x50,
     dv_audio_control = 0x51,
     dv_audio_recdate = 0x52,
     dv_audio_rectime = 0x53,
     dv_video_source  = 0x60,
     dv_video_control = 0x61,
     dv_video_recdate = 0x62,
     dv_video_rectime = 0x63,
     dv_unknown_pack  = 0xff,
};

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#define DV_PROFILE_IS_HD(p) ((p)->video_stype & 0x10)
#define DV_PROFILE_IS_1080i50(p) (((p)->video_stype == 0x14) && ((p)->dsf == 1))
#define DV_PROFILE_IS_720p50(p)  (((p)->video_stype == 0x18) && ((p)->dsf == 1))

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/* minimum number of bytes to read from a DV stream in order to
   determine the profile */
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#define DV_PROFILE_BYTES (6*80) /* 6 DIF blocks */

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/**
 * largest possible DV frame, in bytes (1080i50)
 */
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#define DV_MAX_FRAME_SIZE 576000
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/**
 * maximum number of blocks per macroblock in any DV format
 */
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#define DV_MAX_BPM 8

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static inline const DVprofile* dv_frame_profile(const uint8_t* frame)
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{
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   int i;

   int dsf = (frame[3] & 0x80) >> 7;

   int stype = frame[80*5 + 48 + 3] & 0x1f;

   /* 576i50 25Mbps 4:1:1 is a special case */
   if (dsf == 1 && stype == 0 && frame[5] & 0x07) {
       return &dv_profiles[2];
   }

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   for (i=0; i<FF_ARRAY_ELEMS(dv_profiles); i++)
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       if (dsf == dv_profiles[i].dsf && stype == dv_profiles[i].video_stype)
           return &dv_profiles[i];

   return NULL;
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}

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static const DVprofile* dv_codec_profile(AVCodecContext* codec)
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{
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    int i;

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    for (i=0; i<FF_ARRAY_ELEMS(dv_profiles); i++)
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       if (codec->height  == dv_profiles[i].height  &&
           codec->pix_fmt == dv_profiles[i].pix_fmt &&
           codec->width   == dv_profiles[i].width)
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               return &dv_profiles[i];
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    return NULL;
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}
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static inline int dv_write_dif_id(enum dv_section_type t, uint8_t chan_num,
                                  uint8_t seq_num, uint8_t dif_num,
                                  uint8_t* buf)
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{
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    buf[0] = (uint8_t)t;       /* Section type */
    buf[1] = (seq_num  << 4) | /* DIF seq number 0-9 for 525/60; 0-11 for 625/50 */
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             (chan_num << 3) | /* FSC: for 50Mb/s 0 - first channel; 1 - second */
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             7;                /* reserved -- always 1 */
    buf[2] = dif_num;          /* DIF block number Video: 0-134, Audio: 0-8 */
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    return 3;
}


static inline int dv_write_ssyb_id(uint8_t syb_num, uint8_t fr, uint8_t* buf)
{
    if (syb_num == 0 || syb_num == 6) {
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        buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
                 (0  << 4) | /* AP3 (Subcode application ID) */
                 0x0f;       /* reserved -- always 1 */
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    }
    else if (syb_num == 11) {
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        buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
                 0x7f;       /* reserved -- always 1 */
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    }
    else {
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        buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */
                 (0  << 4) | /* APT (Track application ID) */
                 0x0f;       /* reserved -- always 1 */
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    }
    buf[1] = 0xf0 |            /* reserved -- always 1 */
             (syb_num & 0x0f); /* SSYB number 0 - 11   */
    buf[2] = 0xff;             /* reserved -- always 1 */
    return 3;
}
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#endif /* AVCODEC_DVDATA_H */