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 {
44  int32_t num_rows;
45  uint8_t xbits[16];
46 } IVIHuffDesc;
47 
51 typedef struct {
52  int32_t tab_sel;
53 
54  VLC *tab;
55 
59 } IVIHuffTab;
60 
61 enum {
64 };
65 
66 extern VLC ff_ivi_mb_vlc_tabs [8];
67 extern VLC ff_ivi_blk_vlc_tabs[8];
68 
69 
73 extern const uint8_t ff_ivi_vertical_scan_8x8[64];
74 extern const uint8_t ff_ivi_horizontal_scan_8x8[64];
75 extern const uint8_t ff_ivi_direct_scan_4x4[16];
76 
77 
81 typedef void (InvTransformPtr)(const int32_t *in, int16_t *out, uint32_t pitch, const uint8_t *flags);
82 typedef void (DCTransformPtr) (const int32_t *in, int16_t *out, uint32_t pitch, int blk_size);
83 
84 
88 typedef struct {
89  uint8_t eob_sym;
90  uint8_t esc_sym;
91  uint8_t runtab[256];
92  int8_t valtab[256];
93 } RVMapDesc;
94 
95 extern const RVMapDesc ff_ivi_rvmap_tabs[9];
96 
97 
101 typedef struct {
102  int16_t xpos;
103  int16_t ypos;
104  uint32_t buf_offs;
105  uint8_t type;
106  uint8_t cbp;
107  int8_t q_delta;
108  int8_t mv_x;
109  int8_t mv_y;
110 } IVIMbInfo;
111 
112 
116 typedef struct {
117  int xpos;
118  int ypos;
119  int width;
120  int height;
121  int mb_size;
122  int is_empty;
123  int data_size;
124  int num_MBs;
127 } IVITile;
128 
129 
133 typedef struct {
134  int plane;
135  int band_num;
136  int width;
137  int height;
138  int aheight;
139  const uint8_t *data_ptr;
140  int data_size;
141  int16_t *buf;
142  int16_t *ref_buf;
143  int16_t *bufs[3];
144  int pitch;
145  int is_empty;
146  int mb_size;
147  int blk_size;
152  int quant_mat;
154  const uint8_t *scan;
155 
157 
158  int num_corr;
159  uint8_t corr[61*2];
160  int rvmap_sel;
162  int num_tiles;
168  int32_t checksum;
170  int bufsize;
171  const uint16_t *intra_base;
172  const uint16_t *inter_base;
173  const uint8_t *intra_scale;
174  const uint8_t *inter_scale;
175 } IVIBandDesc;
176 
177 
181 typedef struct {
182  uint16_t width;
183  uint16_t height;
184  uint8_t num_bands;
186 } IVIPlaneDesc;
187 
188 
189 typedef struct {
190  uint16_t pic_width;
191  uint16_t pic_height;
192  uint16_t chroma_width;
193  uint16_t chroma_height;
194  uint16_t tile_width;
195  uint16_t tile_height;
196  uint8_t luma_bands;
197  uint8_t chroma_bands;
198 } IVIPicConfig;
199 
200 typedef struct IVI45DecContext {
204 
205  uint32_t frame_num;
208  uint32_t data_size;
211  const uint8_t *frame_data;
213  uint32_t frame_size;
214  uint32_t pic_hdr_size;
215  uint8_t frame_flags;
216  uint16_t checksum;
217 
220 
222  int dst_buf;
223  int ref_buf;
224  int ref2_buf;
225 
228 
229  uint8_t rvmap_sel;
230  uint8_t in_imf;
231  uint8_t in_q;
232  uint8_t pic_glob_quant;
233  uint8_t unknown1;
234 
235  uint16_t gop_hdr_size;
236  uint8_t gop_flags;
237  uint32_t lock_word;
238 
239 #if IVI4_STREAM_ANALYSER
240  uint8_t has_b_frames;
241  uint8_t has_transp;
242  uint8_t uses_tiling;
243  uint8_t uses_haar;
244  uint8_t uses_fullpel;
245 #endif
246 
247  int (*decode_pic_hdr) (struct IVI45DecContext *ctx, AVCodecContext *avctx);
248  int (*decode_band_hdr) (struct IVI45DecContext *ctx, IVIBandDesc *band, AVCodecContext *avctx);
249  int (*decode_mb_info) (struct IVI45DecContext *ctx, IVIBandDesc *band, IVITile *tile, AVCodecContext *avctx);
251  int (*is_nonnull_frame)(struct IVI45DecContext *ctx);
252 
255 
257 static inline int ivi_pic_config_cmp(IVIPicConfig *str1, IVIPicConfig *str2)
258 {
259  return str1->pic_width != str2->pic_width || str1->pic_height != str2->pic_height ||
260  str1->chroma_width != str2->chroma_width || str1->chroma_height != str2->chroma_height ||
261  str1->tile_width != str2->tile_width || str1->tile_height != str2->tile_height ||
262  str1->luma_bands != str2->luma_bands || str1->chroma_bands != str2->chroma_bands;
263 }
264 
266 #define IVI_NUM_TILES(stride, tile_size) (((stride) + (tile_size) - 1) / (tile_size))
267 
269 #define IVI_MBs_PER_TILE(tile_width, tile_height, mb_size) \
270  ((((tile_width) + (mb_size) - 1) / (mb_size)) * (((tile_height) + (mb_size) - 1) / (mb_size)))
271 
273 #define IVI_TOSIGNED(val) (-(((val) >> 1) ^ -((val) & 1)))
274 
276 static inline int ivi_scale_mv(int mv, int mv_scale)
277 {
278  return (mv + (mv > 0) + (mv_scale - 1)) >> mv_scale;
279 }
280 
290 int ff_ivi_create_huff_from_desc(const IVIHuffDesc *cb, VLC *vlc, int flag);
291 
295 void ff_ivi_init_static_vlc(void);
296 
308 int ff_ivi_dec_huff_desc(GetBitContext *gb, int desc_coded, int which_tab,
309  IVIHuffTab *huff_tab, AVCodecContext *avctx);
310 
318 int ff_ivi_huff_desc_cmp(const IVIHuffDesc *desc1, const IVIHuffDesc *desc2);
319 
326 void ff_ivi_huff_desc_copy(IVIHuffDesc *dst, const IVIHuffDesc *src);
327 
336 
343 
352 int ff_ivi_init_tiles(IVIPlaneDesc *planes, int tile_width, int tile_height);
353 
365 
378 
388 void ff_ivi_output_plane(IVIPlaneDesc *plane, uint8_t *dst, int dst_pitch);
389 
393 uint16_t ivi_calc_band_checksum (IVIBandDesc *band);
394 
398 int ivi_check_band (IVIBandDesc *band, const uint8_t *ref, int pitch);
399 
400 int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
401  AVPacket *avpkt);
403 
404 #endif /* AVCODEC_IVI_COMMON_H */