ivi_common.h
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1 /*
2  * common functions for Indeo Video Interactive codecs (Indeo4 and Indeo5)
3  *
4  * Copyright (c) 2009 Maxim Poliakovski
5  *
6  * This file is part of Libav.
7  *
8  * Libav is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * Libav is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with Libav; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
29 #ifndef AVCODEC_IVI_COMMON_H
30 #define AVCODEC_IVI_COMMON_H
31 
32 #include "avcodec.h"
33 #include "get_bits.h"
34 #include <stdint.h>
35 
36 #define IVI_VLC_BITS 13
37 
38 
41 typedef struct {
42  int32_t num_rows;
43  uint8_t xbits[16];
44 } IVIHuffDesc;
45 
49 typedef struct {
50  int32_t tab_sel;
51 
52  VLC *tab;
53 
57 } IVIHuffTab;
58 
59 enum {
62 };
63 
64 extern VLC ff_ivi_mb_vlc_tabs [8];
65 extern VLC ff_ivi_blk_vlc_tabs[8];
66 
67 
71 extern const uint8_t ff_ivi_vertical_scan_8x8[64];
72 extern const uint8_t ff_ivi_horizontal_scan_8x8[64];
73 extern const uint8_t ff_ivi_direct_scan_4x4[16];
74 
75 
79 typedef void (InvTransformPtr)(const int32_t *in, int16_t *out, uint32_t pitch, const uint8_t *flags);
80 typedef void (DCTransformPtr) (const int32_t *in, int16_t *out, uint32_t pitch, int blk_size);
81 
82 
86 typedef struct {
87  uint8_t eob_sym;
88  uint8_t esc_sym;
89  uint8_t runtab[256];
90  int8_t valtab[256];
91 } RVMapDesc;
92 
93 extern const RVMapDesc ff_ivi_rvmap_tabs[9];
94 
95 
99 typedef struct {
100  int16_t xpos;
101  int16_t ypos;
102  uint32_t buf_offs;
103  uint8_t type;
104  uint8_t cbp;
105  int8_t q_delta;
106  int8_t mv_x;
107  int8_t mv_y;
108 } IVIMbInfo;
109 
110 
114 typedef struct {
115  int xpos;
116  int ypos;
117  int width;
118  int height;
119  int is_empty;
120  int data_size;
121  int num_MBs;
124 } IVITile;
125 
126 
130 typedef struct {
131  int plane;
132  int band_num;
133  int width;
134  int height;
135  const uint8_t *data_ptr;
136  int data_size;
137  int16_t *buf;
138  int16_t *ref_buf;
139  int16_t *bufs[3];
140  int pitch;
141  int is_empty;
142  int mb_size;
143  int blk_size;
148  int quant_mat;
150  const uint8_t *scan;
151 
153 
154  int num_corr;
155  uint8_t corr[61*2];
156  int rvmap_sel;
158  int num_tiles;
163  int32_t checksum;
165  int bufsize;
166  const uint16_t *intra_base;
167  const uint16_t *inter_base;
168  const uint8_t *intra_scale;
169  const uint8_t *inter_scale;
170 } IVIBandDesc;
171 
172 
176 typedef struct {
177  uint16_t width;
178  uint16_t height;
179  uint8_t num_bands;
181 } IVIPlaneDesc;
182 
183 
184 typedef struct {
185  uint16_t pic_width;
186  uint16_t pic_height;
187  uint16_t chroma_width;
188  uint16_t chroma_height;
189  uint16_t tile_width;
190  uint16_t tile_height;
191  uint8_t luma_bands;
192  uint8_t chroma_bands;
193 } IVIPicConfig;
194 
196 static inline int ivi_pic_config_cmp(IVIPicConfig *str1, IVIPicConfig *str2)
197 {
198  return str1->pic_width != str2->pic_width || str1->pic_height != str2->pic_height ||
199  str1->chroma_width != str2->chroma_width || str1->chroma_height != str2->chroma_height ||
200  str1->tile_width != str2->tile_width || str1->tile_height != str2->tile_height ||
201  str1->luma_bands != str2->luma_bands || str1->chroma_bands != str2->chroma_bands;
202 }
203 
205 #define IVI_NUM_TILES(stride, tile_size) (((stride) + (tile_size) - 1) / (tile_size))
206 
208 #define IVI_MBs_PER_TILE(tile_width, tile_height, mb_size) \
209  ((((tile_width) + (mb_size) - 1) / (mb_size)) * (((tile_height) + (mb_size) - 1) / (mb_size)))
210 
212 #define IVI_TOSIGNED(val) (-(((val) >> 1) ^ -((val) & 1)))
213 
215 static inline int ivi_scale_mv(int mv, int mv_scale)
216 {
217  return (mv + (mv > 0) + (mv_scale - 1)) >> mv_scale;
218 }
219 
229 int ff_ivi_create_huff_from_desc(const IVIHuffDesc *cb, VLC *vlc, int flag);
230 
234 void ff_ivi_init_static_vlc(void);
235 
247 int ff_ivi_dec_huff_desc(GetBitContext *gb, int desc_coded, int which_tab,
248  IVIHuffTab *huff_tab, AVCodecContext *avctx);
249 
257 int ff_ivi_huff_desc_cmp(const IVIHuffDesc *desc1, const IVIHuffDesc *desc2);
258 
265 void ff_ivi_huff_desc_copy(IVIHuffDesc *dst, const IVIHuffDesc *src);
266 
274 int ff_ivi_init_planes(IVIPlaneDesc *planes, const IVIPicConfig *cfg);
275 
281 void ff_ivi_free_buffers(IVIPlaneDesc *planes);
282 
291 int ff_ivi_init_tiles(IVIPlaneDesc *planes, int tile_width, int tile_height);
292 
304 
317 
328  IVITile *tile, int32_t mv_scale);
329 
339 void ff_ivi_output_plane(IVIPlaneDesc *plane, uint8_t *dst, int dst_pitch);
340 
344 uint16_t ivi_calc_band_checksum (IVIBandDesc *band);
345 
349 int ivi_check_band (IVIBandDesc *band, const uint8_t *ref, int pitch);
350 
351 #endif /* AVCODEC_IVI_COMMON_H */