FFmpeg  1.2.4
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 FFmpeg.
7  *
8  * FFmpeg 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  * FFmpeg 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 FFmpeg; 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 
54  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  int scan_size;
153 
155 
156  int num_corr;
157  uint8_t corr[61*2];
158  int rvmap_sel;
160  int num_tiles;
168  int bufsize;
169  const uint16_t *intra_base;
170  const uint16_t *inter_base;
173 } IVIBandDesc;
174 
175 
179 typedef struct IVIPlaneDesc {
180  uint16_t width;
181  uint16_t height;
184 } IVIPlaneDesc;
185 
186 
187 typedef struct IVIPicConfig {
188  uint16_t pic_width;
189  uint16_t pic_height;
190  uint16_t chroma_width;
191  uint16_t chroma_height;
192  uint16_t tile_width;
193  uint16_t tile_height;
196 } IVIPicConfig;
197 
198 typedef struct IVI45DecContext {
202 
203  uint32_t frame_num;
206  uint32_t data_size;
211  uint32_t frame_size;
212  uint32_t pic_hdr_size;
214  uint16_t checksum;
215 
218 
220  int dst_buf;
221  int ref_buf;
222  int ref2_buf;
223 
226 
232 
233  uint16_t gop_hdr_size;
235  uint32_t lock_word;
236 
237 #if IVI4_STREAM_ANALYSER
238  uint8_t has_b_frames;
239  uint8_t has_transp;
240  uint8_t uses_tiling;
241  uint8_t uses_haar;
242  uint8_t uses_fullpel;
243 #endif
244 
245  int (*decode_pic_hdr) (struct IVI45DecContext *ctx, AVCodecContext *avctx);
247  int (*decode_mb_info) (struct IVI45DecContext *ctx, IVIBandDesc *band, IVITile *tile, AVCodecContext *avctx);
249  int (*is_nonnull_frame)(struct IVI45DecContext *ctx);
250 
252  int buf_invalid[3];
254 
256 static inline int ivi_pic_config_cmp(IVIPicConfig *str1, IVIPicConfig *str2)
257 {
258  return str1->pic_width != str2->pic_width || str1->pic_height != str2->pic_height ||
259  str1->chroma_width != str2->chroma_width || str1->chroma_height != str2->chroma_height ||
260  str1->tile_width != str2->tile_width || str1->tile_height != str2->tile_height ||
261  str1->luma_bands != str2->luma_bands || str1->chroma_bands != str2->chroma_bands;
262 }
263 
265 #define IVI_NUM_TILES(stride, tile_size) (((stride) + (tile_size) - 1) / (tile_size))
266 
268 #define IVI_MBs_PER_TILE(tile_width, tile_height, mb_size) \
269  ((((tile_width) + (mb_size) - 1) / (mb_size)) * (((tile_height) + (mb_size) - 1) / (mb_size)))
270 
272 #define IVI_TOSIGNED(val) (-(((val) >> 1) ^ -((val) & 1)))
273 
275 static inline int ivi_scale_mv(int mv, int mv_scale)
276 {
277  return (mv + (mv > 0) + (mv_scale - 1)) >> mv_scale;
278 }
279 
283 void ff_ivi_init_static_vlc(void);
284 
296 int ff_ivi_dec_huff_desc(GetBitContext *gb, int desc_coded, int which_tab,
297  IVIHuffTab *huff_tab, AVCodecContext *avctx);
298 
307 
316 int ff_ivi_init_tiles(IVIPlaneDesc *planes, int tile_width, int tile_height);
317 
318 int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
319  AVPacket *avpkt);
321 
322 #endif /* AVCODEC_IVI_COMMON_H */