| Line | Branch | Exec | Source |
|---|---|---|---|
| 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, or "7" for custom one | ||
| 65 | VLC *tab; ///< pointer to the table associated with tab_sel | ||
| 66 | |||
| 67 | // the following are used only when tab_sel == 7 | ||
| 68 | IVIHuffDesc cust_desc; ///< custom Huffman codebook descriptor | ||
| 69 | VLC cust_tab; ///< vlc table for custom codebook | ||
| 70 | } IVIHuffTab; | ||
| 71 | |||
| 72 | enum { | ||
| 73 | IVI_MB_HUFF = 0, ///< Huffman table is used for coding macroblocks | ||
| 74 | IVI_BLK_HUFF = 1 ///< Huffman table is used for coding blocks | ||
| 75 | }; | ||
| 76 | |||
| 77 | |||
| 78 | /** | ||
| 79 | * Common scan patterns (defined in ivi_common.c) | ||
| 80 | */ | ||
| 81 | extern const uint8_t ff_ivi_vertical_scan_8x8[64]; | ||
| 82 | extern const uint8_t ff_ivi_horizontal_scan_8x8[64]; | ||
| 83 | extern const uint8_t ff_ivi_direct_scan_4x4[16]; | ||
| 84 | |||
| 85 | |||
| 86 | /** | ||
| 87 | * Declare inverse transform function types | ||
| 88 | */ | ||
| 89 | typedef void (InvTransformPtr)(const int32_t *in, int16_t *out, ptrdiff_t pitch, const uint8_t *flags); | ||
| 90 | typedef void (DCTransformPtr) (const int32_t *in, int16_t *out, ptrdiff_t pitch, int blk_size); | ||
| 91 | |||
| 92 | |||
| 93 | /** | ||
| 94 | * run-value (RLE) table descriptor | ||
| 95 | */ | ||
| 96 | typedef struct RVMapDesc { | ||
| 97 | uint8_t eob_sym; ///< end of block symbol | ||
| 98 | uint8_t esc_sym; ///< escape symbol | ||
| 99 | uint8_t runtab[256]; | ||
| 100 | int8_t valtab[256]; | ||
| 101 | } RVMapDesc; | ||
| 102 | |||
| 103 | extern const RVMapDesc ff_ivi_rvmap_tabs[9]; | ||
| 104 | |||
| 105 | |||
| 106 | /** | ||
| 107 | * information for Indeo macroblock (16x16, 8x8 or 4x4) | ||
| 108 | */ | ||
| 109 | typedef struct IVIMbInfo { | ||
| 110 | int16_t xpos; | ||
| 111 | int16_t ypos; | ||
| 112 | uint32_t buf_offs; ///< address in the output buffer for this mb | ||
| 113 | uint8_t type; ///< macroblock type: 0 - INTRA, 1 - INTER | ||
| 114 | uint8_t cbp; ///< coded block pattern | ||
| 115 | int8_t q_delta; ///< quant delta | ||
| 116 | int8_t mv_x; ///< motion vector (x component) | ||
| 117 | int8_t mv_y; ///< motion vector (y component) | ||
| 118 | int8_t b_mv_x; ///< second motion vector (x component) | ||
| 119 | int8_t b_mv_y; ///< second motion vector (y component) | ||
| 120 | } IVIMbInfo; | ||
| 121 | |||
| 122 | |||
| 123 | /** | ||
| 124 | * information for Indeo tile | ||
| 125 | */ | ||
| 126 | typedef struct IVITile { | ||
| 127 | int xpos; | ||
| 128 | int ypos; | ||
| 129 | int width; | ||
| 130 | int height; | ||
| 131 | int mb_size; | ||
| 132 | int is_empty; ///< = 1 if this tile doesn't contain any data | ||
| 133 | int data_size; ///< size of the data in bytes | ||
| 134 | int num_MBs; ///< number of macroblocks in this tile | ||
| 135 | IVIMbInfo *mbs; ///< array of macroblock descriptors | ||
| 136 | IVIMbInfo *ref_mbs; ///< ptr to the macroblock descriptors of the reference tile | ||
| 137 | } IVITile; | ||
| 138 | |||
| 139 | |||
| 140 | /** | ||
| 141 | * information for Indeo wavelet band | ||
| 142 | */ | ||
| 143 | typedef struct IVIBandDesc { | ||
| 144 | int plane; ///< plane number this band belongs to | ||
| 145 | int band_num; ///< band number | ||
| 146 | int width; | ||
| 147 | int height; | ||
| 148 | int aheight; ///< aligned band height | ||
| 149 | const uint8_t *data_ptr; ///< ptr to the first byte of the band data | ||
| 150 | int data_size; ///< size of the band data | ||
| 151 | int16_t *buf; ///< pointer to the output buffer for this band | ||
| 152 | int16_t *ref_buf; ///< pointer to the reference frame buffer (for motion compensation) | ||
| 153 | int16_t *b_ref_buf; ///< pointer to the second reference frame buffer (for motion compensation) | ||
| 154 | int16_t *bufs[4]; ///< array of pointers to the band buffers | ||
| 155 | ptrdiff_t pitch; ///< pitch associated with the buffers above | ||
| 156 | int is_empty; ///< = 1 if this band doesn't contain any data | ||
| 157 | int mb_size; ///< macroblock size | ||
| 158 | int blk_size; ///< block size | ||
| 159 | int is_halfpel; ///< precision of the motion compensation: 0 - fullpel, 1 - halfpel | ||
| 160 | int inherit_mv; ///< tells if motion vector is inherited from reference macroblock | ||
| 161 | int inherit_qdelta; ///< tells if quantiser delta is inherited from reference macroblock | ||
| 162 | int qdelta_present; ///< tells if Qdelta signal is present in the bitstream (Indeo5 only) | ||
| 163 | int quant_mat; ///< dequant matrix index | ||
| 164 | int glob_quant; ///< quant base for this band | ||
| 165 | const uint8_t *scan; ///< ptr to the scan pattern | ||
| 166 | int scan_size; ///< size of the scantable | ||
| 167 | |||
| 168 | IVIHuffTab blk_vlc; ///< vlc table for decoding block data | ||
| 169 | |||
| 170 | int num_corr; ///< number of correction entries | ||
| 171 | uint8_t corr[61*2]; ///< rvmap correction pairs | ||
| 172 | int rvmap_sel; ///< rvmap table selector | ||
| 173 | RVMapDesc *rv_map; ///< ptr to the RLE table for this band | ||
| 174 | int num_tiles; ///< number of tiles in this band | ||
| 175 | IVITile *tiles; ///< array of tile descriptors | ||
| 176 | InvTransformPtr *inv_transform; | ||
| 177 | int transform_size; | ||
| 178 | DCTransformPtr *dc_transform; | ||
| 179 | int is_2d_trans; ///< 1 indicates that the two-dimensional inverse transform is used | ||
| 180 | int32_t checksum; ///< for debug purposes | ||
| 181 | int checksum_present; | ||
| 182 | int bufsize; ///< band buffer size in bytes | ||
| 183 | const uint16_t *intra_base; ///< quantization matrix for intra blocks | ||
| 184 | const uint16_t *inter_base; ///< quantization matrix for inter blocks | ||
| 185 | const uint8_t *intra_scale; ///< quantization coefficient for intra blocks | ||
| 186 | const uint8_t *inter_scale; ///< quantization coefficient for inter blocks | ||
| 187 | } IVIBandDesc; | ||
| 188 | |||
| 189 | |||
| 190 | /** | ||
| 191 | * color plane (luma or chroma) information | ||
| 192 | */ | ||
| 193 | typedef struct IVIPlaneDesc { | ||
| 194 | uint16_t width; | ||
| 195 | uint16_t height; | ||
| 196 | uint8_t num_bands; ///< number of bands this plane subdivided into | ||
| 197 | IVIBandDesc *bands; ///< array of band descriptors | ||
| 198 | } IVIPlaneDesc; | ||
| 199 | |||
| 200 | |||
| 201 | typedef struct IVIPicConfig { | ||
| 202 | uint16_t pic_width; | ||
| 203 | uint16_t pic_height; | ||
| 204 | uint16_t chroma_width; | ||
| 205 | uint16_t chroma_height; | ||
| 206 | uint16_t tile_width; | ||
| 207 | uint16_t tile_height; | ||
| 208 | uint8_t luma_bands; | ||
| 209 | uint8_t chroma_bands; | ||
| 210 | } IVIPicConfig; | ||
| 211 | |||
| 212 | typedef struct IVI45DecContext { | ||
| 213 | GetBitContext gb; | ||
| 214 | RVMapDesc rvmap_tabs[9]; ///< local corrected copy of the static rvmap tables | ||
| 215 | |||
| 216 | uint32_t frame_num; | ||
| 217 | int frame_type; | ||
| 218 | int prev_frame_type; ///< frame type of the previous frame | ||
| 219 | uint32_t data_size; ///< size of the frame data in bytes from picture header | ||
| 220 | int is_scalable; | ||
| 221 | const uint8_t *frame_data; ///< input frame data pointer | ||
| 222 | int inter_scal; ///< signals a sequence of scalable inter frames | ||
| 223 | uint32_t frame_size; ///< frame size in bytes | ||
| 224 | uint32_t pic_hdr_size; ///< picture header size in bytes | ||
| 225 | uint8_t frame_flags; | ||
| 226 | uint16_t checksum; ///< frame checksum | ||
| 227 | |||
| 228 | IVIPicConfig pic_conf; | ||
| 229 | IVIPlaneDesc planes[3]; ///< color planes | ||
| 230 | |||
| 231 | int buf_switch; ///< used to switch between three buffers | ||
| 232 | int dst_buf; ///< buffer index for the currently decoded frame | ||
| 233 | int ref_buf; ///< inter frame reference buffer index | ||
| 234 | int ref2_buf; ///< temporal storage for switching buffers | ||
| 235 | int b_ref_buf; ///< second reference frame buffer index | ||
| 236 | |||
| 237 | IVIHuffTab mb_vlc; ///< current macroblock table descriptor | ||
| 238 | IVIHuffTab blk_vlc; ///< current block table descriptor | ||
| 239 | |||
| 240 | uint8_t rvmap_sel; | ||
| 241 | uint8_t in_imf; | ||
| 242 | uint8_t in_q; ///< flag for explicitly stored quantiser delta | ||
| 243 | uint8_t pic_glob_quant; | ||
| 244 | uint8_t unknown1; | ||
| 245 | |||
| 246 | uint16_t gop_hdr_size; | ||
| 247 | uint8_t gop_flags; | ||
| 248 | uint32_t lock_word; | ||
| 249 | |||
| 250 | int show_indeo4_info; | ||
| 251 | uint8_t has_b_frames; | ||
| 252 | uint8_t has_transp; ///< transparency mode status: 1 - enabled | ||
| 253 | uint8_t uses_tiling; | ||
| 254 | uint8_t uses_haar; | ||
| 255 | uint8_t uses_fullpel; | ||
| 256 | |||
| 257 | int (*decode_pic_hdr) (struct IVI45DecContext *ctx, AVCodecContext *avctx); | ||
| 258 | int (*decode_band_hdr) (struct IVI45DecContext *ctx, IVIBandDesc *band, AVCodecContext *avctx); | ||
| 259 | int (*decode_mb_info) (struct IVI45DecContext *ctx, IVIBandDesc *band, IVITile *tile, AVCodecContext *avctx); | ||
| 260 | void (*switch_buffers) (struct IVI45DecContext *ctx); | ||
| 261 | int (*is_nonnull_frame)(struct IVI45DecContext *ctx); | ||
| 262 | |||
| 263 | int gop_invalid; | ||
| 264 | int buf_invalid[4]; | ||
| 265 | |||
| 266 | int is_indeo4; | ||
| 267 | |||
| 268 | AVFrame *p_frame; | ||
| 269 | int got_p_frame; | ||
| 270 | } IVI45DecContext; | ||
| 271 | |||
| 272 | /** compare some properties of two pictures */ | ||
| 273 | 110 | static inline int ivi_pic_config_cmp(IVIPicConfig *str1, IVIPicConfig *str2) | |
| 274 | { | ||
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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; |
| 279 | } | ||
| 280 | |||
| 281 | /** calculate number of tiles in a stride */ | ||
| 282 | #define IVI_NUM_TILES(stride, tile_size) (((stride) + (tile_size) - 1) / (tile_size)) | ||
| 283 | |||
| 284 | /** calculate number of macroblocks in a tile */ | ||
| 285 | #define IVI_MBs_PER_TILE(tile_width, tile_height, mb_size) \ | ||
| 286 | ((((tile_width) + (mb_size) - 1) / (mb_size)) * (((tile_height) + (mb_size) - 1) / (mb_size))) | ||
| 287 | |||
| 288 | /** convert unsigned values into signed ones (the sign is in the LSB) */ | ||
| 289 | #define IVI_TOSIGNED(val) (-(((val) >> 1) ^ -((val) & 1))) | ||
| 290 | |||
| 291 | /** scale motion vector */ | ||
| 292 | 94572 | static inline int ivi_scale_mv(int mv, int mv_scale) | |
| 293 | { | ||
| 294 | 94572 | return (mv + (mv > 0) + (mv_scale - 1)) >> mv_scale; | |
| 295 | } | ||
| 296 | |||
| 297 | /** | ||
| 298 | * Initialize static codes used for macroblock and block decoding. | ||
| 299 | */ | ||
| 300 | void ff_ivi_init_static_vlc(void); | ||
| 301 | |||
| 302 | /** | ||
| 303 | * Decode a huffman codebook descriptor from the bitstream | ||
| 304 | * and select specified huffman table. | ||
| 305 | * | ||
| 306 | * @param[in,out] gb the GetBit context | ||
| 307 | * @param[in] desc_coded flag signalling if table descriptor was coded | ||
| 308 | * @param[in] which_tab codebook purpose (IVI_MB_HUFF or IVI_BLK_HUFF) | ||
| 309 | * @param[out] huff_tab pointer to the descriptor of the selected table | ||
| 310 | * @param[in] avctx AVCodecContext pointer | ||
| 311 | * @return zero on success, negative value otherwise | ||
| 312 | */ | ||
| 313 | int ff_ivi_dec_huff_desc(GetBitContext *gb, int desc_coded, int which_tab, | ||
| 314 | IVIHuffTab *huff_tab, AVCodecContext *avctx); | ||
| 315 | |||
| 316 | /** | ||
| 317 | * Initialize planes (prepares descriptors, allocates buffers etc). | ||
| 318 | * | ||
| 319 | * @param[in,out] planes pointer to the array of the plane descriptors | ||
| 320 | * @param[in] cfg pointer to the ivi_pic_config structure describing picture layout | ||
| 321 | * @param[in] is_indeo4 flag signalling if it is Indeo 4 or not | ||
| 322 | * @return result code: 0 - OK | ||
| 323 | */ | ||
| 324 | int ff_ivi_init_planes(AVCodecContext *avctx, IVIPlaneDesc *planes, | ||
| 325 | const IVIPicConfig *cfg, int is_indeo4); | ||
| 326 | |||
| 327 | /** | ||
| 328 | * Initialize tile and macroblock descriptors. | ||
| 329 | * | ||
| 330 | * @param[in,out] planes pointer to the array of the plane descriptors | ||
| 331 | * @param[in] tile_width tile width | ||
| 332 | * @param[in] tile_height tile height | ||
| 333 | * @return result code: 0 - OK | ||
| 334 | */ | ||
| 335 | int ff_ivi_init_tiles(IVIPlaneDesc *planes, int tile_width, int tile_height); | ||
| 336 | |||
| 337 | int ff_ivi_decode_frame(AVCodecContext *avctx, AVFrame *data, | ||
| 338 | int *got_frame, AVPacket *avpkt); | ||
| 339 | int ff_ivi_decode_close(AVCodecContext *avctx); | ||
| 340 | |||
| 341 | #endif /* AVCODEC_IVI_H */ | ||
| 342 |