| /* |
| * Constants for DV codec |
| * Copyright (c) 2002 Fabrice Bellard |
| * |
| * 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 |
| * Constants for DV codec. |
| */ |
| |
| #ifndef AVCODEC_DVDATA_H |
| #define AVCODEC_DVDATA_H |
| |
| #include "libavutil/rational.h" |
| #include "avcodec.h" |
| |
| typedef struct DVwork_chunk { |
| uint16_t buf_offset; |
| uint16_t mb_coordinates[5]; |
| } DVwork_chunk; |
| |
| /* |
| * DVprofile is used to express the differences between various |
| * 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 { |
| 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 */ |
| DVwork_chunk *work_chunks; /* each thread gets its own chunk of frame to work on */ |
| uint32_t *idct_factor; /* set of iDCT factor tables */ |
| 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 */ |
| } DVprofile; |
| |
| /* unquant tables (not used directly) */ |
| static const uint8_t dv_quant_shifts[22][4] = { |
| { 3,3,4,4 }, |
| { 3,3,4,4 }, |
| { 2,3,3,4 }, |
| { 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 }, |
| { 0,0,1,1 }, |
| { 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 }, |
| { 0,0,0,0 }, |
| }; |
| |
| static const uint8_t dv_quant_offset[4] = { 6, 3, 0, 1 }; |
| static const uint8_t dv_quant_areas[4] = { 6, 21, 43, 64 }; |
| |
| /* 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 |
| }; |
| |
| /* 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, |
| }; |
| |
| /** |
| * The "inverse" DV100 weights are actually just the spec weights (zig-zagged). |
| */ |
| static const int dv_iweight_1080_y[64] = { |
| 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, |
| }; |
| static const int dv_iweight_1080_c[64] = { |
| 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, |
| 197, 203, 209, 219, 209, 232, 232, 246, |
| }; |
| static const int dv_iweight_720_y[64] = { |
| 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, |
| 196, 202, 208, 218, 208, 232, 232, 246, |
| }; |
| static const int dv_iweight_720_c[64] = { |
| 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, |
| 168, 182, 182, 192, 186, 192, 172, 186, |
| 192, 394, 382, 354, 382, 394, 406, 394, |
| 394, 406, 418, 438, 418, 464, 464, 492, |
| }; |
| |
| 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}, |
| }; |
| |
| static const av_unused int dv_audio_frequency[3] = { |
| 48000, 44100, 32000, |
| }; |
| |
| /* 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, |
| }; |
| |
| 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, |
| }; |
| |
| #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)) |
| |
| /* minimum number of bytes to read from a DV stream in order to |
| determine the profile */ |
| #define DV_PROFILE_BYTES (6*80) /* 6 DIF blocks */ |
| |
| /** |
| * largest possible DV frame, in bytes (1080i50) |
| */ |
| #define DV_MAX_FRAME_SIZE 576000 |
| |
| /** |
| * maximum number of blocks per macroblock in any DV format |
| */ |
| #define DV_MAX_BPM 8 |
| |
| const DVprofile* avpriv_dv_frame_profile(const DVprofile *sys, |
| const uint8_t* frame, unsigned buf_size); |
| const DVprofile* avpriv_dv_frame_profile2(AVCodecContext* codec, const DVprofile *sys, |
| const uint8_t* frame, unsigned buf_size); |
| const DVprofile* avpriv_dv_codec_profile(AVCodecContext* codec); |
| |
| 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) |
| { |
| 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 */ |
| (chan_num << 3) | /* FSC: for 50Mb/s 0 - first channel; 1 - second */ |
| 7; /* reserved -- always 1 */ |
| buf[2] = dif_num; /* DIF block number Video: 0-134, Audio: 0-8 */ |
| 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) { |
| buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */ |
| (0 << 4) | /* AP3 (Subcode application ID) */ |
| 0x0f; /* reserved -- always 1 */ |
| } |
| else if (syb_num == 11) { |
| buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */ |
| 0x7f; /* reserved -- always 1 */ |
| } |
| else { |
| buf[0] = (fr << 7) | /* FR ID 1 - first half of each channel; 0 - second */ |
| (0 << 4) | /* APT (Track application ID) */ |
| 0x0f; /* reserved -- always 1 */ |
| } |
| buf[1] = 0xf0 | /* reserved -- always 1 */ |
| (syb_num & 0x0f); /* SSYB number 0 - 11 */ |
| buf[2] = 0xff; /* reserved -- always 1 */ |
| return 3; |
| } |
| |
| #endif /* AVCODEC_DVDATA_H */ |
