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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 | |||
23 | /** | ||
24 | * @file | ||
25 | * This file contains structures and macros shared by both Indeo4 and | ||
26 | * Indeo5 decoders. | ||
27 | */ | ||
28 | |||
29 | #ifndef AVCODEC_IVI_H | ||
30 | #define AVCODEC_IVI_H | ||
31 | |||
32 | #include "avcodec.h" | ||
33 | #include "get_bits.h" | ||
34 | #include <stdint.h> | ||
35 | |||
36 | /** | ||
37 | * Indeo 4 frame types. | ||
38 | */ | ||
39 | enum { | ||
40 | IVI4_FRAMETYPE_INTRA = 0, | ||
41 | IVI4_FRAMETYPE_INTRA1 = 1, ///< intra frame with slightly different bitstream coding | ||
42 | IVI4_FRAMETYPE_INTER = 2, ///< non-droppable P-frame | ||
43 | IVI4_FRAMETYPE_BIDIR = 3, ///< bidirectional frame | ||
44 | IVI4_FRAMETYPE_INTER_NOREF = 4, ///< droppable P-frame | ||
45 | IVI4_FRAMETYPE_NULL_FIRST = 5, ///< empty frame with no data | ||
46 | IVI4_FRAMETYPE_NULL_LAST = 6 ///< empty frame with no data | ||
47 | }; | ||
48 | |||
49 | #define IVI_VLC_BITS 13 ///< max number of bits of the ivi's huffman codes | ||
50 | #define IVI5_IS_PROTECTED 0x20 | ||
51 | |||
52 | /** | ||
53 | * huffman codebook descriptor | ||
54 | */ | ||
55 | typedef struct IVIHuffDesc { | ||
56 | int32_t num_rows; | ||
57 | uint8_t xbits[16]; | ||
58 | } IVIHuffDesc; | ||
59 | |||
60 | /** | ||
61 | * macroblock/block huffman table descriptor | ||
62 | */ | ||
63 | typedef struct IVIHuffTab { | ||
64 | int32_t tab_sel; /// index of one of the predefined tables | ||
65 | /// or "7" for custom one | ||
66 | VLC *tab; /// pointer to the table associated with tab_sel | ||
67 | |||
68 | /// the following are used only when tab_sel == 7 | ||
69 | IVIHuffDesc cust_desc; /// custom Huffman codebook descriptor | ||
70 | VLC cust_tab; /// vlc table for custom codebook | ||
71 | } IVIHuffTab; | ||
72 | |||
73 | enum { | ||
74 | IVI_MB_HUFF = 0, /// Huffman table is used for coding macroblocks | ||
75 | IVI_BLK_HUFF = 1 /// Huffman table is used for coding blocks | ||
76 | }; | ||
77 | |||
78 | |||
79 | /** | ||
80 | * Common scan patterns (defined in ivi_common.c) | ||
81 | */ | ||
82 | extern const uint8_t ff_ivi_vertical_scan_8x8[64]; | ||
83 | extern const uint8_t ff_ivi_horizontal_scan_8x8[64]; | ||
84 | extern const uint8_t ff_ivi_direct_scan_4x4[16]; | ||
85 | |||
86 | |||
87 | /** | ||
88 | * Declare inverse transform function types | ||
89 | */ | ||
90 | typedef void (InvTransformPtr)(const int32_t *in, int16_t *out, ptrdiff_t pitch, const uint8_t *flags); | ||
91 | typedef void (DCTransformPtr) (const int32_t *in, int16_t *out, ptrdiff_t pitch, int blk_size); | ||
92 | |||
93 | |||
94 | /** | ||
95 | * run-value (RLE) table descriptor | ||
96 | */ | ||
97 | typedef struct RVMapDesc { | ||
98 | uint8_t eob_sym; ///< end of block symbol | ||
99 | uint8_t esc_sym; ///< escape symbol | ||
100 | uint8_t runtab[256]; | ||
101 | int8_t valtab[256]; | ||
102 | } RVMapDesc; | ||
103 | |||
104 | extern const RVMapDesc ff_ivi_rvmap_tabs[9]; | ||
105 | |||
106 | |||
107 | /** | ||
108 | * information for Indeo macroblock (16x16, 8x8 or 4x4) | ||
109 | */ | ||
110 | typedef struct IVIMbInfo { | ||
111 | int16_t xpos; | ||
112 | int16_t ypos; | ||
113 | uint32_t buf_offs; ///< address in the output buffer for this mb | ||
114 | uint8_t type; ///< macroblock type: 0 - INTRA, 1 - INTER | ||
115 | uint8_t cbp; ///< coded block pattern | ||
116 | int8_t q_delta; ///< quant delta | ||
117 | int8_t mv_x; ///< motion vector (x component) | ||
118 | int8_t mv_y; ///< motion vector (y component) | ||
119 | int8_t b_mv_x; ///< second motion vector (x component) | ||
120 | int8_t b_mv_y; ///< second motion vector (y component) | ||
121 | } IVIMbInfo; | ||
122 | |||
123 | |||
124 | /** | ||
125 | * information for Indeo tile | ||
126 | */ | ||
127 | typedef struct IVITile { | ||
128 | int xpos; | ||
129 | int ypos; | ||
130 | int width; | ||
131 | int height; | ||
132 | int mb_size; | ||
133 | int is_empty; ///< = 1 if this tile doesn't contain any data | ||
134 | int data_size; ///< size of the data in bytes | ||
135 | int num_MBs; ///< number of macroblocks in this tile | ||
136 | IVIMbInfo *mbs; ///< array of macroblock descriptors | ||
137 | IVIMbInfo *ref_mbs; ///< ptr to the macroblock descriptors of the reference tile | ||
138 | } IVITile; | ||
139 | |||
140 | |||
141 | /** | ||
142 | * information for Indeo wavelet band | ||
143 | */ | ||
144 | typedef struct IVIBandDesc { | ||
145 | int plane; ///< plane number this band belongs to | ||
146 | int band_num; ///< band number | ||
147 | int width; | ||
148 | int height; | ||
149 | int aheight; ///< aligned band height | ||
150 | const uint8_t *data_ptr; ///< ptr to the first byte of the band data | ||
151 | int data_size; ///< size of the band data | ||
152 | int16_t *buf; ///< pointer to the output buffer for this band | ||
153 | int16_t *ref_buf; ///< pointer to the reference frame buffer (for motion compensation) | ||
154 | int16_t *b_ref_buf; ///< pointer to the second reference frame buffer (for motion compensation) | ||
155 | int16_t *bufs[4]; ///< array of pointers to the band buffers | ||
156 | ptrdiff_t pitch; ///< pitch associated with the buffers above | ||
157 | int is_empty; ///< = 1 if this band doesn't contain any data | ||
158 | int mb_size; ///< macroblock size | ||
159 | int blk_size; ///< block size | ||
160 | int is_halfpel; ///< precision of the motion compensation: 0 - fullpel, 1 - halfpel | ||
161 | int inherit_mv; ///< tells if motion vector is inherited from reference macroblock | ||
162 | int inherit_qdelta; ///< tells if quantiser delta is inherited from reference macroblock | ||
163 | int qdelta_present; ///< tells if Qdelta signal is present in the bitstream (Indeo5 only) | ||
164 | int quant_mat; ///< dequant matrix index | ||
165 | int glob_quant; ///< quant base for this band | ||
166 | const uint8_t *scan; ///< ptr to the scan pattern | ||
167 | int scan_size; ///< size of the scantable | ||
168 | |||
169 | IVIHuffTab blk_vlc; ///< vlc table for decoding block data | ||
170 | |||
171 | int num_corr; ///< number of correction entries | ||
172 | uint8_t corr[61*2]; ///< rvmap correction pairs | ||
173 | int rvmap_sel; ///< rvmap table selector | ||
174 | RVMapDesc *rv_map; ///< ptr to the RLE table for this band | ||
175 | int num_tiles; ///< number of tiles in this band | ||
176 | IVITile *tiles; ///< array of tile descriptors | ||
177 | InvTransformPtr *inv_transform; | ||
178 | int transform_size; | ||
179 | DCTransformPtr *dc_transform; | ||
180 | int is_2d_trans; ///< 1 indicates that the two-dimensional inverse transform is used | ||
181 | int32_t checksum; ///< for debug purposes | ||
182 | int checksum_present; | ||
183 | int bufsize; ///< band buffer size in bytes | ||
184 | const uint16_t *intra_base; ///< quantization matrix for intra blocks | ||
185 | const uint16_t *inter_base; ///< quantization matrix for inter blocks | ||
186 | const uint8_t *intra_scale; ///< quantization coefficient for intra blocks | ||
187 | const uint8_t *inter_scale; ///< quantization coefficient for inter blocks | ||
188 | } IVIBandDesc; | ||
189 | |||
190 | |||
191 | /** | ||
192 | * color plane (luma or chroma) information | ||
193 | */ | ||
194 | typedef struct IVIPlaneDesc { | ||
195 | uint16_t width; | ||
196 | uint16_t height; | ||
197 | uint8_t num_bands; ///< number of bands this plane subdivided into | ||
198 | IVIBandDesc *bands; ///< array of band descriptors | ||
199 | } IVIPlaneDesc; | ||
200 | |||
201 | |||
202 | typedef struct IVIPicConfig { | ||
203 | uint16_t pic_width; | ||
204 | uint16_t pic_height; | ||
205 | uint16_t chroma_width; | ||
206 | uint16_t chroma_height; | ||
207 | uint16_t tile_width; | ||
208 | uint16_t tile_height; | ||
209 | uint8_t luma_bands; | ||
210 | uint8_t chroma_bands; | ||
211 | } IVIPicConfig; | ||
212 | |||
213 | typedef struct IVI45DecContext { | ||
214 | GetBitContext gb; | ||
215 | RVMapDesc rvmap_tabs[9]; ///< local corrected copy of the static rvmap tables | ||
216 | |||
217 | uint32_t frame_num; | ||
218 | int frame_type; | ||
219 | int prev_frame_type; ///< frame type of the previous frame | ||
220 | uint32_t data_size; ///< size of the frame data in bytes from picture header | ||
221 | int is_scalable; | ||
222 | const uint8_t *frame_data; ///< input frame data pointer | ||
223 | int inter_scal; ///< signals a sequence of scalable inter frames | ||
224 | uint32_t frame_size; ///< frame size in bytes | ||
225 | uint32_t pic_hdr_size; ///< picture header size in bytes | ||
226 | uint8_t frame_flags; | ||
227 | uint16_t checksum; ///< frame checksum | ||
228 | |||
229 | IVIPicConfig pic_conf; | ||
230 | IVIPlaneDesc planes[3]; ///< color planes | ||
231 | |||
232 | int buf_switch; ///< used to switch between three buffers | ||
233 | int dst_buf; ///< buffer index for the currently decoded frame | ||
234 | int ref_buf; ///< inter frame reference buffer index | ||
235 | int ref2_buf; ///< temporal storage for switching buffers | ||
236 | int b_ref_buf; ///< second reference frame buffer index | ||
237 | |||
238 | IVIHuffTab mb_vlc; ///< current macroblock table descriptor | ||
239 | IVIHuffTab blk_vlc; ///< current block table descriptor | ||
240 | |||
241 | uint8_t rvmap_sel; | ||
242 | uint8_t in_imf; | ||
243 | uint8_t in_q; ///< flag for explicitly stored quantiser delta | ||
244 | uint8_t pic_glob_quant; | ||
245 | uint8_t unknown1; | ||
246 | |||
247 | uint16_t gop_hdr_size; | ||
248 | uint8_t gop_flags; | ||
249 | uint32_t lock_word; | ||
250 | |||
251 | int show_indeo4_info; | ||
252 | uint8_t has_b_frames; | ||
253 | uint8_t has_transp; ///< transparency mode status: 1 - enabled | ||
254 | uint8_t uses_tiling; | ||
255 | uint8_t uses_haar; | ||
256 | uint8_t uses_fullpel; | ||
257 | |||
258 | int (*decode_pic_hdr) (struct IVI45DecContext *ctx, AVCodecContext *avctx); | ||
259 | int (*decode_band_hdr) (struct IVI45DecContext *ctx, IVIBandDesc *band, AVCodecContext *avctx); | ||
260 | int (*decode_mb_info) (struct IVI45DecContext *ctx, IVIBandDesc *band, IVITile *tile, AVCodecContext *avctx); | ||
261 | void (*switch_buffers) (struct IVI45DecContext *ctx); | ||
262 | int (*is_nonnull_frame)(struct IVI45DecContext *ctx); | ||
263 | |||
264 | int gop_invalid; | ||
265 | int buf_invalid[4]; | ||
266 | |||
267 | int is_indeo4; | ||
268 | |||
269 | AVFrame *p_frame; | ||
270 | int got_p_frame; | ||
271 | } IVI45DecContext; | ||
272 | |||
273 | /** compare some properties of two pictures */ | ||
274 | 110 | static inline int ivi_pic_config_cmp(IVIPicConfig *str1, IVIPicConfig *str2) | |
275 | { | ||
276 |
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109 | return str1->pic_width != str2->pic_width || str1->pic_height != str2->pic_height || |
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109 | str1->chroma_width != str2->chroma_width || str1->chroma_height != str2->chroma_height || |
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109 | str1->tile_width != str2->tile_width || str1->tile_height != str2->tile_height || |
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219 | str1->luma_bands != str2->luma_bands || str1->chroma_bands != str2->chroma_bands; |
280 | } | ||
281 | |||
282 | /** calculate number of tiles in a stride */ | ||
283 | #define IVI_NUM_TILES(stride, tile_size) (((stride) + (tile_size) - 1) / (tile_size)) | ||
284 | |||
285 | /** calculate number of macroblocks in a tile */ | ||
286 | #define IVI_MBs_PER_TILE(tile_width, tile_height, mb_size) \ | ||
287 | ((((tile_width) + (mb_size) - 1) / (mb_size)) * (((tile_height) + (mb_size) - 1) / (mb_size))) | ||
288 | |||
289 | /** convert unsigned values into signed ones (the sign is in the LSB) */ | ||
290 | #define IVI_TOSIGNED(val) (-(((val) >> 1) ^ -((val) & 1))) | ||
291 | |||
292 | /** scale motion vector */ | ||
293 | 94572 | static inline int ivi_scale_mv(int mv, int mv_scale) | |
294 | { | ||
295 | 94572 | return (mv + (mv > 0) + (mv_scale - 1)) >> mv_scale; | |
296 | } | ||
297 | |||
298 | /** | ||
299 | * Initialize static codes used for macroblock and block decoding. | ||
300 | */ | ||
301 | void ff_ivi_init_static_vlc(void); | ||
302 | |||
303 | /** | ||
304 | * Decode a huffman codebook descriptor from the bitstream | ||
305 | * and select specified huffman table. | ||
306 | * | ||
307 | * @param[in,out] gb the GetBit context | ||
308 | * @param[in] desc_coded flag signalling if table descriptor was coded | ||
309 | * @param[in] which_tab codebook purpose (IVI_MB_HUFF or IVI_BLK_HUFF) | ||
310 | * @param[out] huff_tab pointer to the descriptor of the selected table | ||
311 | * @param[in] avctx AVCodecContext pointer | ||
312 | * @return zero on success, negative value otherwise | ||
313 | */ | ||
314 | int ff_ivi_dec_huff_desc(GetBitContext *gb, int desc_coded, int which_tab, | ||
315 | IVIHuffTab *huff_tab, AVCodecContext *avctx); | ||
316 | |||
317 | /** | ||
318 | * Initialize planes (prepares descriptors, allocates buffers etc). | ||
319 | * | ||
320 | * @param[in,out] planes pointer to the array of the plane descriptors | ||
321 | * @param[in] cfg pointer to the ivi_pic_config structure describing picture layout | ||
322 | * @param[in] is_indeo4 flag signalling if it is Indeo 4 or not | ||
323 | * @return result code: 0 - OK | ||
324 | */ | ||
325 | int ff_ivi_init_planes(AVCodecContext *avctx, IVIPlaneDesc *planes, | ||
326 | const IVIPicConfig *cfg, int is_indeo4); | ||
327 | |||
328 | /** | ||
329 | * Initialize tile and macroblock descriptors. | ||
330 | * | ||
331 | * @param[in,out] planes pointer to the array of the plane descriptors | ||
332 | * @param[in] tile_width tile width | ||
333 | * @param[in] tile_height tile height | ||
334 | * @return result code: 0 - OK | ||
335 | */ | ||
336 | int ff_ivi_init_tiles(IVIPlaneDesc *planes, int tile_width, int tile_height); | ||
337 | |||
338 | int ff_ivi_decode_frame(AVCodecContext *avctx, AVFrame *data, | ||
339 | int *got_frame, AVPacket *avpkt); | ||
340 | int ff_ivi_decode_close(AVCodecContext *avctx); | ||
341 | |||
342 | #endif /* AVCODEC_IVI_H */ | ||
343 |