FFmpeg/libavcodec/dvdata.c

/*
 * Constants for DV codec
 * Copyright (c) 2002 Fabrice Bellard
 *
 * This file is part of Libav.
 *
 * Libav 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.
 *
 * Libav 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 Libav; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file
 * Constants for DV codec.
 */

#include "libavutil/rational.h"
#include "avcodec.h"
#include "dvdata.h"

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];

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];

static const uint8_t dv_audio_shuffle525[10][9] = {
  {  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 },

  {  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 },
};

static const uint8_t dv_audio_shuffle625[12][9] = {
  {   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},
  {  24,  60,  96,  14,  50,  86,   4,  40,  76},
  {  30,  66, 102,  20,  56,  92,  10,  46,  82},

  {   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},
  {  25,  61,  97,  15,  51,  87,   5,  41,  77},
  {  31,  67, 103,  21,  57,  93,  11,  47,  83},
};

/* 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,
};
static const DVprofile dv_profiles[] = {
    { .dsf = 0,
      .video_stype = 0x0,
      .frame_size = 120000,        /* IEC 61834, SMPTE-314M - 525/60 (NTSC) */
      .difseg_size = 10,
      .n_difchan = 1,
      .time_base = { 1001, 30000 },
      .ltc_divisor = 30,
      .height = 480,
      .width = 720,
      .sar = {{8, 9}, {32, 27}},
      .work_chunks = &work_chunks_dv25ntsc[0],
      .idct_factor = &dv_idct_factor_sd[0],
      .pix_fmt = PIX_FMT_YUV411P,
      .bpm = 6,
      .block_sizes = block_sizes_dv2550,
      .audio_stride = 90,
      .audio_min_samples  = { 1580, 1452, 1053 }, /* for 48, 44.1 and 32kHz */
      .audio_samples_dist = { 1600, 1602, 1602, 1602, 1602 }, /* per SMPTE-314M */
      .audio_shuffle = dv_audio_shuffle525,
    },
    { .dsf = 1,
      .video_stype = 0x0,
      .frame_size = 144000,        /* IEC 61834 - 625/50 (PAL) */
      .difseg_size = 12,
      .n_difchan = 1,
      .time_base = { 1, 25 },
      .ltc_divisor = 25,
      .height = 576,
      .width = 720,
      .sar = {{16, 15}, {64, 45}},
      .work_chunks = &work_chunks_dv25pal[0],
      .idct_factor = &dv_idct_factor_sd[0],
      .pix_fmt = PIX_FMT_YUV420P,
      .bpm = 6,
      .block_sizes = block_sizes_dv2550,
      .audio_stride = 108,
      .audio_min_samples  = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32kHz */
      .audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 },
      .audio_shuffle = dv_audio_shuffle625,
    },
    { .dsf = 1,
      .video_stype = 0x0,
      .frame_size = 144000,        /* SMPTE-314M - 625/50 (PAL) */
      .difseg_size = 12,
      .n_difchan = 1,
      .time_base = { 1, 25 },
      .ltc_divisor = 25,
      .height = 576,
      .width = 720,
      .sar = {{16, 15}, {64, 45}},
      .work_chunks = &work_chunks_dv25pal411[0],
      .idct_factor = &dv_idct_factor_sd[0],
      .pix_fmt = PIX_FMT_YUV411P,
      .bpm = 6,
      .block_sizes = block_sizes_dv2550,
      .audio_stride = 108,
      .audio_min_samples  = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32kHz */
      .audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 },
      .audio_shuffle = dv_audio_shuffle625,
    },
    { .dsf = 0,
      .video_stype = 0x4,
      .frame_size = 240000,        /* SMPTE-314M - 525/60 (NTSC) 50 Mbps */
      .difseg_size = 10,           /* also known as "DVCPRO50" */
      .n_difchan = 2,
      .time_base = { 1001, 30000 },
      .ltc_divisor = 30,
      .height = 480,
      .width = 720,
      .sar = {{8, 9}, {32, 27}},
      .work_chunks = &work_chunks_dv50ntsc[0],
      .idct_factor = &dv_idct_factor_sd[0],
      .pix_fmt = PIX_FMT_YUV422P,
      .bpm = 6,
      .block_sizes = block_sizes_dv2550,
      .audio_stride = 90,
      .audio_min_samples  = { 1580, 1452, 1053 }, /* for 48, 44.1 and 32kHz */
      .audio_samples_dist = { 1600, 1602, 1602, 1602, 1602 }, /* per SMPTE-314M */
      .audio_shuffle = dv_audio_shuffle525,
    },
    { .dsf = 1,
      .video_stype = 0x4,
      .frame_size = 288000,        /* SMPTE-314M - 625/50 (PAL) 50 Mbps */
      .difseg_size = 12,           /* also known as "DVCPRO50" */
      .n_difchan = 2,
      .time_base = { 1, 25 },
      .ltc_divisor = 25,
      .height = 576,
      .width = 720,
      .sar = {{16, 15}, {64, 45}},
      .work_chunks = &work_chunks_dv50pal[0],
      .idct_factor = &dv_idct_factor_sd[0],
      .pix_fmt = PIX_FMT_YUV422P,
      .bpm = 6,
      .block_sizes = block_sizes_dv2550,
      .audio_stride = 108,
      .audio_min_samples  = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32kHz */
      .audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 },
      .audio_shuffle = dv_audio_shuffle625,
    },
    { .dsf = 0,
      .video_stype = 0x14,
      .frame_size = 480000,        /* SMPTE-370M - 1080i60 100 Mbps */
      .difseg_size = 10,           /* also known as "DVCPRO HD" */
      .n_difchan = 4,
      .time_base = { 1001, 30000 },
      .ltc_divisor = 30,
      .height = 1080,
      .width = 1280,
      .sar = {{1, 1}, {3, 2}},
      .work_chunks = &work_chunks_dv100ntsci[0],
      .idct_factor = &dv_idct_factor_hd1080[0],
      .pix_fmt = PIX_FMT_YUV422P,
      .bpm = 8,
      .block_sizes = block_sizes_dv100,
      .audio_stride = 90,
      .audio_min_samples  = { 1580, 1452, 1053 }, /* for 48, 44.1 and 32kHz */
      .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,
      .time_base = { 1, 25 },
      .ltc_divisor = 25,
      .height = 1080,
      .width = 1440,
      .sar = {{1, 1}, {4, 3}},
      .work_chunks = &work_chunks_dv100pali[0],
      .idct_factor = &dv_idct_factor_hd1080[0],
      .pix_fmt = PIX_FMT_YUV422P,
      .bpm = 8,
      .block_sizes = block_sizes_dv100,
      .audio_stride = 108,
      .audio_min_samples  = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32kHz */
      .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,
      .time_base = { 1001, 60000 },
      .ltc_divisor = 60,
      .height = 720,
      .width = 960,
      .sar = {{1, 1}, {4, 3}},
      .work_chunks = &work_chunks_dv100ntscp[0],
      .idct_factor = &dv_idct_factor_hd720[0],
      .pix_fmt = PIX_FMT_YUV422P,
      .bpm = 8,
      .block_sizes = block_sizes_dv100,
      .audio_stride = 90,
      .audio_min_samples  = { 1580, 1452, 1053 }, /* for 48, 44.1 and 32kHz */
      .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,
      .time_base = { 1, 50 },
      .ltc_divisor = 50,
      .height = 720,
      .width = 960,
      .sar = {{1, 1}, {4, 3}},
      .work_chunks = &work_chunks_dv100palp[0],
      .idct_factor = &dv_idct_factor_hd720[0],
      .pix_fmt = PIX_FMT_YUV422P,
      .bpm = 8,
      .block_sizes = block_sizes_dv100,
      .audio_stride = 90,
      .audio_min_samples  = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32kHz */
      .audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 },
      .audio_shuffle = dv_audio_shuffle625,
    },
    { .dsf = 1,
      .video_stype = 0x1,
      .frame_size = 144000,        /* IEC 61883-5 - 625/50 (PAL) */
      .difseg_size = 12,
      .n_difchan = 1,
      .time_base = { 1, 25 },
      .ltc_divisor = 25,
      .height = 576,
      .width = 720,
      .sar = {{16, 15}, {64, 45}},
      .work_chunks = &work_chunks_dv25pal[0],
      .idct_factor = &dv_idct_factor_sd[0],
      .pix_fmt = PIX_FMT_YUV420P,
      .bpm = 6,
      .block_sizes = block_sizes_dv2550,
      .audio_stride = 108,
      .audio_min_samples  = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32kHz */
      .audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 },
      .audio_shuffle = dv_audio_shuffle625,
    }
};

const DVprofile* avpriv_dv_frame_profile(const DVprofile *sys,
                                  const uint8_t* frame, unsigned buf_size)
{
    int i, dsf, stype;

    if (buf_size < 80 * 5 + 48 + 4)
        return NULL;

    dsf = (frame[3] & 0x80) >> 7;
    stype = frame[80 * 5 + 48 + 3] & 0x1f;

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

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

    /* check if old sys matches and assumes corrupted input */
    if (sys && buf_size == sys->frame_size)
        return sys;

    return NULL;
}

const DVprofile* avpriv_dv_codec_profile(AVCodecContext* codec)
{
    int i;

    for (i=0; i<FF_ARRAY_ELEMS(dv_profiles); i++)
       if (codec->height  == dv_profiles[i].height  &&
           codec->pix_fmt == dv_profiles[i].pix_fmt &&
           codec->width   == dv_profiles[i].width)
               return &dv_profiles[i];

    return NULL;
}