/*
- * 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"
-#include "dsputil.h"
-#include "get_bits.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;
-
-typedef struct DVVideoContext {
- const DVprofile *sys;
- AVFrame picture;
- AVCodecContext *avctx;
- uint8_t *buf;
-
- uint8_t dv_zigzag[2][64];
-
- void (*get_pixels)(DCTELEM *block, const uint8_t *pixels, int line_size);
- void (*fdct[2])(DCTELEM *block);
- void (*idct_put[2])(uint8_t *dest, int line_size, DCTELEM *block);
- me_cmp_func ildct_cmp;
-} DVVideoContext;
-
-enum dv_section_type {
- dv_sect_header = 0x1f,
- dv_sect_subcode = 0x3f,
- dv_sect_vaux = 0x56,
- dv_sect_audio = 0x76,
- dv_sect_video = 0x96,
-};
+#include <stdint.h>
-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,
-};
+extern const uint8_t ff_dv_zigzag248_direct[64];
-#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))
+extern const uint8_t ff_dv_quant_shifts[22][4];
+extern const uint8_t ff_dv_quant_offset[4];
-/* 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 */
+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];
-/**
- * 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
-
-#define TEX_VLC_BITS 9
-
-extern RL_VLC_ELEM ff_dv_rl_vlc[1184];
-
-const DVprofile* avpriv_dv_frame_profile(const DVprofile *sys,
- const uint8_t* frame, unsigned buf_size);
-const DVprofile* avpriv_dv_codec_profile(AVCodecContext* codec);
+#define NB_DV_VLC 409
-int ff_dv_init_dynamic_tables(const DVprofile *d);
-int ff_dvvideo_init(AVCodecContext *avctx);
-
-static inline int dv_work_pool_size(const DVprofile *d)
-{
- int size = d->n_difchan*d->difseg_size*27;
- if (DV_PROFILE_IS_1080i50(d))
- size -= 3*27;
- if (DV_PROFILE_IS_720p50(d))
- size -= 4*27;
- return size;
-}
-
-static inline void dv_calculate_mb_xy(DVVideoContext *s, DVwork_chunk *work_chunk, int m, int *mb_x, int *mb_y)
-{
- *mb_x = work_chunk->mb_coordinates[m] & 0xff;
- *mb_y = work_chunk->mb_coordinates[m] >> 8;
-
- /* We work with 720p frames split in half. The odd half-frame (chan==2,3) is displaced :-( */
- if (s->sys->height == 720 && !(s->buf[1]&0x0C)) {
- *mb_y -= (*mb_y>17)?18:-72; /* shifting the Y coordinate down by 72/2 macro blocks */
- }
-}
-
-/**
- * Print all allowed DV profiles into logctx at specified logging level.
- */
-void ff_dv_print_profiles(void *logctx, int loglevel);
+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