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FFmpeg/libavcodec/dvdata.c

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  1. /*

  2.  * Constants for DV codec

  3.  * Copyright (c) 2002 Fabrice Bellard

  4.  *

  5.  * This file is part of Libav.

  6.  *

  7.  * Libav is free software; you can redistribute it and/or

  8.  * modify it under the terms of the GNU Lesser General Public

  9.  * License as published by the Free Software Foundation; either

  10.  * version 2.1 of the License, or (at your option) any later version.

  11.  *

  12.  * Libav is distributed in the hope that it will be useful,

  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  15.  * Lesser General Public License for more details.

  16.  *

  17.  * You should have received a copy of the GNU Lesser General Public

  18.  * License along with Libav; if not, write to the Free Software

  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  20.  */

  21. 

  22. /**

  23.  * @file

  24.  * Constants for DV codec.

  25.  */

  26. 

  27. #include "libavutil/rational.h"

  28. #include "avcodec.h"

  29. #include "dvdata.h"

  30. 

  31. static DVwork_chunk work_chunks_dv25pal   [1*12*27];

  32. static DVwork_chunk work_chunks_dv25pal411[1*12*27];

  33. static DVwork_chunk work_chunks_dv25ntsc  [1*10*27];

  34. static DVwork_chunk work_chunks_dv50pal   [2*12*27];

  35. static DVwork_chunk work_chunks_dv50ntsc  [2*10*27];

  36. static DVwork_chunk work_chunks_dv100palp [2*12*27];

  37. static DVwork_chunk work_chunks_dv100ntscp[2*10*27];

  38. static DVwork_chunk work_chunks_dv100pali [4*12*27];

  39. static DVwork_chunk work_chunks_dv100ntsci[4*10*27];

  40. 

  41. static uint32_t dv_idct_factor_sd    [2*2*22*64];

  42. static uint32_t dv_idct_factor_hd1080[2*4*16*64];

  43. static uint32_t dv_idct_factor_hd720 [2*4*16*64];

  44. 

  45. static const uint8_t dv_audio_shuffle525[10][9] = {

  46.   {  0, 30, 60, 20, 50, 80, 10, 40, 70 }, /* 1st channel */

  47.   {  6, 36, 66, 26, 56, 86, 16, 46, 76 },

  48.   { 12, 42, 72,  2, 32, 62, 22, 52, 82 },

  49.   { 18, 48, 78,  8, 38, 68, 28, 58, 88 },

  50.   { 24, 54, 84, 14, 44, 74,  4, 34, 64 },

  51. 

  52.   {  1, 31, 61, 21, 51, 81, 11, 41, 71 }, /* 2nd channel */

  53.   {  7, 37, 67, 27, 57, 87, 17, 47, 77 },

  54.   { 13, 43, 73,  3, 33, 63, 23, 53, 83 },

  55.   { 19, 49, 79,  9, 39, 69, 29, 59, 89 },

  56.   { 25, 55, 85, 15, 45, 75,  5, 35, 65 },

  57. };

  58. 

  59. static const uint8_t dv_audio_shuffle625[12][9] = {

  60.   {   0,  36,  72,  26,  62,  98,  16,  52,  88}, /* 1st channel */

  61.   {   6,  42,  78,  32,  68, 104,  22,  58,  94},

  62.   {  12,  48,  84,   2,  38,  74,  28,  64, 100},

  63.   {  18,  54,  90,   8,  44,  80,  34,  70, 106},

  64.   {  24,  60,  96,  14,  50,  86,   4,  40,  76},

  65.   {  30,  66, 102,  20,  56,  92,  10,  46,  82},

  66. 

  67.   {   1,  37,  73,  27,  63,  99,  17,  53,  89}, /* 2nd channel */

  68.   {   7,  43,  79,  33,  69, 105,  23,  59,  95},

  69.   {  13,  49,  85,   3,  39,  75,  29,  65, 101},

  70.   {  19,  55,  91,   9,  45,  81,  35,  71, 107},

  71.   {  25,  61,  97,  15,  51,  87,   5,  41,  77},

  72.   {  31,  67, 103,  21,  57,  93,  11,  47,  83},

  73. };

  74. 

  75. /* macroblock bit budgets */

  76. static const uint8_t block_sizes_dv2550[8] = {

  77.     112, 112, 112, 112, 80, 80, 0, 0,

  78. };

  79. 

  80. static const uint8_t block_sizes_dv100[8] = {

  81.     80, 80, 80, 80, 80, 80, 64, 64,

  82. };

  83. static const DVprofile dv_profiles[] = {

  84.     { .dsf = 0,

  85.       .video_stype = 0x0,

  86.       .frame_size = 120000,        /* IEC 61834, SMPTE-314M - 525/60 (NTSC) */

  87.       .difseg_size = 10,

  88.       .n_difchan = 1,

  89.       .time_base = { 1001, 30000 },

  90.       .ltc_divisor = 30,

  91.       .height = 480,

  92.       .width = 720,

  93.       .sar = {{8, 9}, {32, 27}},

  94.       .work_chunks = &work_chunks_dv25ntsc[0],

  95.       .idct_factor = &dv_idct_factor_sd[0],

  96.       .pix_fmt = PIX_FMT_YUV411P,

  97.       .bpm = 6,

  98.       .block_sizes = block_sizes_dv2550,

  99.       .audio_stride = 90,

  100.       .audio_min_samples  = { 1580, 1452, 1053 }, /* for 48, 44.1 and 32kHz */

  101.       .audio_samples_dist = { 1600, 1602, 1602, 1602, 1602 }, /* per SMPTE-314M */

  102.       .audio_shuffle = dv_audio_shuffle525,

  103.     },

  104.     { .dsf = 1,

  105.       .video_stype = 0x0,

  106.       .frame_size = 144000,        /* IEC 61834 - 625/50 (PAL) */

  107.       .difseg_size = 12,

  108.       .n_difchan = 1,

  109.       .time_base = { 1, 25 },

  110.       .ltc_divisor = 25,

  111.       .height = 576,

  112.       .width = 720,

  113.       .sar = {{16, 15}, {64, 45}},

  114.       .work_chunks = &work_chunks_dv25pal[0],

  115.       .idct_factor = &dv_idct_factor_sd[0],

  116.       .pix_fmt = PIX_FMT_YUV420P,

  117.       .bpm = 6,

  118.       .block_sizes = block_sizes_dv2550,

  119.       .audio_stride = 108,

  120.       .audio_min_samples  = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32kHz */

  121.       .audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 },

  122.       .audio_shuffle = dv_audio_shuffle625,

  123.     },

  124.     { .dsf = 1,

  125.       .video_stype = 0x0,

  126.       .frame_size = 144000,        /* SMPTE-314M - 625/50 (PAL) */

  127.       .difseg_size = 12,

  128.       .n_difchan = 1,

  129.       .time_base = { 1, 25 },

  130.       .ltc_divisor = 25,

  131.       .height = 576,

  132.       .width = 720,

  133.       .sar = {{16, 15}, {64, 45}},

  134.       .work_chunks = &work_chunks_dv25pal411[0],

  135.       .idct_factor = &dv_idct_factor_sd[0],

  136.       .pix_fmt = PIX_FMT_YUV411P,

  137.       .bpm = 6,

  138.       .block_sizes = block_sizes_dv2550,

  139.       .audio_stride = 108,

  140.       .audio_min_samples  = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32kHz */

  141.       .audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 },

  142.       .audio_shuffle = dv_audio_shuffle625,

  143.     },

  144.     { .dsf = 0,

  145.       .video_stype = 0x4,

  146.       .frame_size = 240000,        /* SMPTE-314M - 525/60 (NTSC) 50 Mbps */

  147.       .difseg_size = 10,           /* also known as "DVCPRO50" */

  148.       .n_difchan = 2,

  149.       .time_base = { 1001, 30000 },

  150.       .ltc_divisor = 30,

  151.       .height = 480,

  152.       .width = 720,

  153.       .sar = {{8, 9}, {32, 27}},

  154.       .work_chunks = &work_chunks_dv50ntsc[0],

  155.       .idct_factor = &dv_idct_factor_sd[0],

  156.       .pix_fmt = PIX_FMT_YUV422P,

  157.       .bpm = 6,

  158.       .block_sizes = block_sizes_dv2550,

  159.       .audio_stride = 90,

  160.       .audio_min_samples  = { 1580, 1452, 1053 }, /* for 48, 44.1 and 32kHz */

  161.       .audio_samples_dist = { 1600, 1602, 1602, 1602, 1602 }, /* per SMPTE-314M */

  162.       .audio_shuffle = dv_audio_shuffle525,

  163.     },

  164.     { .dsf = 1,

  165.       .video_stype = 0x4,

  166.       .frame_size = 288000,        /* SMPTE-314M - 625/50 (PAL) 50 Mbps */

  167.       .difseg_size = 12,           /* also known as "DVCPRO50" */

  168.       .n_difchan = 2,

  169.       .time_base = { 1, 25 },

  170.       .ltc_divisor = 25,

  171.       .height = 576,

  172.       .width = 720,

  173.       .sar = {{16, 15}, {64, 45}},

  174.       .work_chunks = &work_chunks_dv50pal[0],

  175.       .idct_factor = &dv_idct_factor_sd[0],

  176.       .pix_fmt = PIX_FMT_YUV422P,

  177.       .bpm = 6,

  178.       .block_sizes = block_sizes_dv2550,

  179.       .audio_stride = 108,

  180.       .audio_min_samples  = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32kHz */

  181.       .audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 },

  182.       .audio_shuffle = dv_audio_shuffle625,

  183.     },

  184.     { .dsf = 0,

  185.       .video_stype = 0x14,

  186.       .frame_size = 480000,        /* SMPTE-370M - 1080i60 100 Mbps */

  187.       .difseg_size = 10,           /* also known as "DVCPRO HD" */

  188.       .n_difchan = 4,

  189.       .time_base = { 1001, 30000 },

  190.       .ltc_divisor = 30,

  191.       .height = 1080,

  192.       .width = 1280,

  193.       .sar = {{1, 1}, {3, 2}},

  194.       .work_chunks = &work_chunks_dv100ntsci[0],

  195.       .idct_factor = &dv_idct_factor_hd1080[0],

  196.       .pix_fmt = PIX_FMT_YUV422P,

  197.       .bpm = 8,

  198.       .block_sizes = block_sizes_dv100,

  199.       .audio_stride = 90,

  200.       .audio_min_samples  = { 1580, 1452, 1053 }, /* for 48, 44.1 and 32kHz */

  201.       .audio_samples_dist = { 1600, 1602, 1602, 1602, 1602 }, /* per SMPTE-314M */

  202.       .audio_shuffle = dv_audio_shuffle525,

  203.     },

  204.     { .dsf = 1,

  205.       .video_stype = 0x14,

  206.       .frame_size = 576000,        /* SMPTE-370M - 1080i50 100 Mbps */

  207.       .difseg_size = 12,           /* also known as "DVCPRO HD" */

  208.       .n_difchan = 4,

  209.       .time_base = { 1, 25 },

  210.       .ltc_divisor = 25,

  211.       .height = 1080,

  212.       .width = 1440,

  213.       .sar = {{1, 1}, {4, 3}},

  214.       .work_chunks = &work_chunks_dv100pali[0],

  215.       .idct_factor = &dv_idct_factor_hd1080[0],

  216.       .pix_fmt = PIX_FMT_YUV422P,

  217.       .bpm = 8,

  218.       .block_sizes = block_sizes_dv100,

  219.       .audio_stride = 108,

  220.       .audio_min_samples  = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32kHz */

  221.       .audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 },

  222.       .audio_shuffle = dv_audio_shuffle625,

  223.     },

  224.     { .dsf = 0,

  225.       .video_stype = 0x18,

  226.       .frame_size = 240000,        /* SMPTE-370M - 720p60 100 Mbps */

  227.       .difseg_size = 10,           /* also known as "DVCPRO HD" */

  228.       .n_difchan = 2,

  229.       .time_base = { 1001, 60000 },

  230.       .ltc_divisor = 60,

  231.       .height = 720,

  232.       .width = 960,

  233.       .sar = {{1, 1}, {4, 3}},

  234.       .work_chunks = &work_chunks_dv100ntscp[0],

  235.       .idct_factor = &dv_idct_factor_hd720[0],

  236.       .pix_fmt = PIX_FMT_YUV422P,

  237.       .bpm = 8,

  238.       .block_sizes = block_sizes_dv100,

  239.       .audio_stride = 90,

  240.       .audio_min_samples  = { 1580, 1452, 1053 }, /* for 48, 44.1 and 32kHz */

  241.       .audio_samples_dist = { 1600, 1602, 1602, 1602, 1602 }, /* per SMPTE-314M */

  242.       .audio_shuffle = dv_audio_shuffle525,

  243.     },

  244.     { .dsf = 1,

  245.       .video_stype = 0x18,

  246.       .frame_size = 288000,        /* SMPTE-370M - 720p50 100 Mbps */

  247.       .difseg_size = 12,           /* also known as "DVCPRO HD" */

  248.       .n_difchan = 2,

  249.       .time_base = { 1, 50 },

  250.       .ltc_divisor = 50,

  251.       .height = 720,

  252.       .width = 960,

  253.       .sar = {{1, 1}, {4, 3}},

  254.       .work_chunks = &work_chunks_dv100palp[0],

  255.       .idct_factor = &dv_idct_factor_hd720[0],

  256.       .pix_fmt = PIX_FMT_YUV422P,

  257.       .bpm = 8,

  258.       .block_sizes = block_sizes_dv100,

  259.       .audio_stride = 90,

  260.       .audio_min_samples  = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32kHz */

  261.       .audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 },

  262.       .audio_shuffle = dv_audio_shuffle625,

  263.     },

  264.     { .dsf = 1,

  265.       .video_stype = 0x1,

  266.       .frame_size = 144000,        /* IEC 61883-5 - 625/50 (PAL) */

  267.       .difseg_size = 12,

  268.       .n_difchan = 1,

  269.       .time_base = { 1, 25 },

  270.       .ltc_divisor = 25,

  271.       .height = 576,

  272.       .width = 720,

  273.       .sar = {{16, 15}, {64, 45}},

  274.       .work_chunks = &work_chunks_dv25pal[0],

  275.       .idct_factor = &dv_idct_factor_sd[0],

  276.       .pix_fmt = PIX_FMT_YUV420P,

  277.       .bpm = 6,

  278.       .block_sizes = block_sizes_dv2550,

  279.       .audio_stride = 108,

  280.       .audio_min_samples  = { 1896, 1742, 1264 }, /* for 48, 44.1 and 32kHz */

  281.       .audio_samples_dist = { 1920, 1920, 1920, 1920, 1920 },

  282.       .audio_shuffle = dv_audio_shuffle625,

  283.     }

  284. };

  285. 

  286. const DVprofile* avpriv_dv_frame_profile(const DVprofile *sys,

  287.                                   const uint8_t* frame, unsigned buf_size)

  288. {

  289.    int i;

  290. 

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

  292. 

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

  294. 

  295.    /* 576i50 25Mbps 4:1:1 is a special case */

  296.    if (dsf == 1 && stype == 0 && frame[4] & 0x07 /* the APT field */) {

  297.        return &dv_profiles[2];

  298.    }

  299. 

  300.    for (i=0; i<FF_ARRAY_ELEMS(dv_profiles); i++)

  301.        if (dsf == dv_profiles[i].dsf && stype == dv_profiles[i].video_stype)

  302.            return &dv_profiles[i];

  303. 

  304.    /* check if old sys matches and assumes corrupted input */

  305.    if (sys && buf_size == sys->frame_size)

  306.        return sys;

  307. 

  308.    return NULL;

  309. }

  310. 

  311. const DVprofile* avpriv_dv_codec_profile(AVCodecContext* codec)

  312. {

  313.     int i;

  314. 

  315.     for (i=0; i<FF_ARRAY_ELEMS(dv_profiles); i++)

  316.        if (codec->height  == dv_profiles[i].height  &&

  317.            codec->pix_fmt == dv_profiles[i].pix_fmt &&

  318.            codec->width   == dv_profiles[i].width)

  319.                return &dv_profiles[i];

  320. 

  321.     return NULL;

  322. }