/*
  * 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 "avcodec.h"

 #include "dsputil.h"
 #include "get_bits.h"

 #include "dv_profile.h"

 typedef struct DVVideoContext {
     const DVprofile *sys;
     AVFrame          picture;
     AVCodecContext  *avctx;
     uint8_t         *buf;
 
     uint8_t  dv_zigzag[2][64];
 

     void (*get_pixels)(int16_t *block, const uint8_t *pixels, int line_size);
     void (*fdct[2])(int16_t *block);
     void (*idct_put[2])(uint8_t *dest, int line_size, int16_t *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,
 };
 
 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_quant_shifts[22][4];
 extern const uint8_t ff_dv_quant_offset[4];
 
 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 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))
 

 /**
  * 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];
 
 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 */
      }
 }
 

 #endif /* AVCODEC_DVDATA_H */