Libav
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 #define IVI4_STREAM_ANALYSER 0
38 #define IVI5_IS_PROTECTED 0x20
39 
43 typedef struct IVIHuffDesc {
46 } IVIHuffDesc;
47 
51 typedef struct IVIHuffTab {
53  VLC *tab;
55 
59 } IVIHuffTab;
60 
61 enum {
64 };
65 
66 
70 extern const uint8_t ff_ivi_vertical_scan_8x8[64];
71 extern const uint8_t ff_ivi_horizontal_scan_8x8[64];
72 extern const uint8_t ff_ivi_direct_scan_4x4[16];
73 
74 
78 typedef void (InvTransformPtr)(const int32_t *in, int16_t *out, uint32_t pitch, const uint8_t *flags);
79 typedef void (DCTransformPtr) (const int32_t *in, int16_t *out, uint32_t pitch, int blk_size);
80 
81 
85 typedef struct RVMapDesc {
89  int8_t valtab[256];
90 } RVMapDesc;
91 
92 extern const RVMapDesc ff_ivi_rvmap_tabs[9];
93 
94 
98 typedef struct IVIMbInfo {
99  int16_t xpos;
100  int16_t ypos;
101  uint32_t buf_offs;
104  int8_t q_delta;
105  int8_t mv_x;
106  int8_t mv_y;
107 } IVIMbInfo;
108 
109 
113 typedef struct IVITile {
114  int xpos;
115  int ypos;
116  int width;
117  int height;
118  int mb_size;
119  int is_empty;
120  int data_size;
121  int num_MBs;
124 } IVITile;
125 
126 
130 typedef struct IVIBandDesc {
131  int plane;
132  int band_num;
133  int width;
134  int height;
135  int aheight;
136  const uint8_t *data_ptr;
137  int data_size;
138  int16_t *buf;
139  int16_t *ref_buf;
140  int16_t *bufs[3];
141  int pitch;
142  int is_empty;
143  int mb_size;
144  int blk_size;
149  int quant_mat;
151  const uint8_t *scan;
152 
154 
155  int num_corr;
156  uint8_t corr[61*2];
157  int rvmap_sel;
159  int num_tiles;
167  int bufsize;
168  const uint16_t *intra_base;
169  const uint16_t *inter_base;
172 } IVIBandDesc;
173 
174 
178 typedef struct IVIPlaneDesc {
179  uint16_t width;
180  uint16_t height;
183 } IVIPlaneDesc;
184 
185 
186 typedef struct IVIPicConfig {
187  uint16_t pic_width;
188  uint16_t pic_height;
189  uint16_t chroma_width;
190  uint16_t chroma_height;
191  uint16_t tile_width;
192  uint16_t tile_height;
195 } IVIPicConfig;
196 
197 typedef struct IVI45DecContext {
200 
201  uint32_t frame_num;
204  uint32_t data_size;
209  uint32_t frame_size;
210  uint32_t pic_hdr_size;
212  uint16_t checksum;
213 
216 
218  int dst_buf;
219  int ref_buf;
220  int ref2_buf;
221 
224 
230 
231  uint16_t gop_hdr_size;
233  uint32_t lock_word;
234 
235 #if IVI4_STREAM_ANALYSER
236  uint8_t has_b_frames;
237  uint8_t has_transp;
238  uint8_t uses_tiling;
239  uint8_t uses_haar;
240  uint8_t uses_fullpel;
241 #endif
242 
243  int (*decode_pic_hdr) (struct IVI45DecContext *ctx, AVCodecContext *avctx);
244  int (*decode_band_hdr) (struct IVI45DecContext *ctx, IVIBandDesc *band, AVCodecContext *avctx);
245  int (*decode_mb_info) (struct IVI45DecContext *ctx, IVIBandDesc *band, IVITile *tile, AVCodecContext *avctx);
247  int (*is_nonnull_frame)(struct IVI45DecContext *ctx);
248 
251 
253 static inline int ivi_pic_config_cmp(IVIPicConfig *str1, IVIPicConfig *str2)
254 {
255  return str1->pic_width != str2->pic_width || str1->pic_height != str2->pic_height ||
256  str1->chroma_width != str2->chroma_width || str1->chroma_height != str2->chroma_height ||
257  str1->tile_width != str2->tile_width || str1->tile_height != str2->tile_height ||
258  str1->luma_bands != str2->luma_bands || str1->chroma_bands != str2->chroma_bands;
259 }
260 
262 #define IVI_NUM_TILES(stride, tile_size) (((stride) + (tile_size) - 1) / (tile_size))
263 
265 #define IVI_MBs_PER_TILE(tile_width, tile_height, mb_size) \
266  ((((tile_width) + (mb_size) - 1) / (mb_size)) * (((tile_height) + (mb_size) - 1) / (mb_size)))
267 
269 #define IVI_TOSIGNED(val) (-(((val) >> 1) ^ -((val) & 1)))
270 
272 static inline int ivi_scale_mv(int mv, int mv_scale)
273 {
274  return (mv + (mv > 0) + (mv_scale - 1)) >> mv_scale;
275 }
276 
280 void ff_ivi_init_static_vlc(void);
281 
293 int ff_ivi_dec_huff_desc(GetBitContext *gb, int desc_coded, int which_tab,
294  IVIHuffTab *huff_tab, AVCodecContext *avctx);
295 
304 
313 int ff_ivi_init_tiles(IVIPlaneDesc *planes, int tile_width, int tile_height);
314 
315 int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
316  AVPacket *avpkt);
318 
319 #endif /* AVCODEC_IVI_COMMON_H */