/*
- * 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
* 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;
-
-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},
-};
+#include <stdint.h>
-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
+extern const uint8_t ff_dv_zigzag248_direct[64];
-const DVprofile* avpriv_dv_frame_profile(const DVprofile *sys,
- const uint8_t* frame, unsigned buf_size);
-const DVprofile* avpriv_dv_codec_profile(AVCodecContext* codec);
+extern const uint8_t ff_dv_quant_shifts[22][4];
+extern const uint8_t ff_dv_quant_offset[4];
-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;
-}
+extern const int ff_dv_iweight_88[64];
+extern const int ff_dv_iweight_248[64];
+extern const int ff_dv_iweight_1080_y[64];
+extern const int ff_dv_iweight_1080_c[64];
+extern const int ff_dv_iweight_720_y[64];
+extern const int ff_dv_iweight_720_c[64];
+#define NB_DV_VLC 409
-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;
-}
+extern const uint16_t ff_dv_vlc_bits[NB_DV_VLC];
+extern const uint8_t ff_dv_vlc_len[NB_DV_VLC];
+extern const uint8_t ff_dv_vlc_run[NB_DV_VLC];
+extern const uint8_t ff_dv_vlc_level[NB_DV_VLC];
#endif /* AVCODEC_DVDATA_H */
projects / ffmpeg / blobdiff