2 * common functions for Indeo Video Interactive codecs (Indeo4 and Indeo5)
4 * Copyright (c) 2009 Maxim Poliakovski
6 * This file is part of FFmpeg.
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.
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.
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
25 * This file contains structures and macros shared by both Indeo4 and
29 #ifndef AVCODEC_IVI_COMMON_H
30 #define AVCODEC_IVI_COMMON_H
36 #define IVI_VLC_BITS 13 ///< max number of bits of the ivi's huffman codes
37 #define IVI4_STREAM_ANALYSER 0
38 #define IVI5_IS_PROTECTED 0x20
41 * huffman codebook descriptor
43 typedef struct IVIHuffDesc {
49 * macroblock/block huffman table descriptor
51 typedef struct IVIHuffTab {
52 int32_t tab_sel; /// index of one of the predefined tables
53 /// or "7" for custom one
54 VLC *tab; /// pointer to the table associated with tab_sel
56 /// the following are used only when tab_sel == 7
57 IVIHuffDesc cust_desc; /// custom Huffman codebook descriptor
58 VLC cust_tab; /// vlc table for custom codebook
62 IVI_MB_HUFF = 0, /// Huffman table is used for coding macroblocks
63 IVI_BLK_HUFF = 1 /// Huffman table is used for coding blocks
68 * Common scan patterns (defined in ivi_common.c)
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];
76 * Declare inverse transform function types
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);
83 * run-value (RLE) table descriptor
85 typedef struct RVMapDesc {
86 uint8_t eob_sym; ///< end of block symbol
87 uint8_t esc_sym; ///< escape symbol
92 extern const RVMapDesc ff_ivi_rvmap_tabs[9];
96 * information for Indeo macroblock (16x16, 8x8 or 4x4)
98 typedef struct IVIMbInfo {
101 uint32_t buf_offs; ///< address in the output buffer for this mb
102 uint8_t type; ///< macroblock type: 0 - INTRA, 1 - INTER
103 uint8_t cbp; ///< coded block pattern
104 int8_t q_delta; ///< quant delta
105 int8_t mv_x; ///< motion vector (x component)
106 int8_t mv_y; ///< motion vector (y component)
111 * information for Indeo tile
113 typedef struct IVITile {
119 int is_empty; ///< = 1 if this tile doesn't contain any data
120 int data_size; ///< size of the data in bytes
121 int num_MBs; ///< number of macroblocks in this tile
122 IVIMbInfo *mbs; ///< array of macroblock descriptors
123 IVIMbInfo *ref_mbs; ///< ptr to the macroblock descriptors of the reference tile
128 * information for Indeo wavelet band
130 typedef struct IVIBandDesc {
131 int plane; ///< plane number this band belongs to
132 int band_num; ///< band number
135 int aheight; ///< aligned band height
136 const uint8_t *data_ptr; ///< ptr to the first byte of the band data
137 int data_size; ///< size of the band data
138 int16_t *buf; ///< pointer to the output buffer for this band
139 int16_t *ref_buf; ///< pointer to the reference frame buffer (for motion compensation)
140 int16_t *bufs[3]; ///< array of pointers to the band buffers
141 int pitch; ///< pitch associated with the buffers above
142 int is_empty; ///< = 1 if this band doesn't contain any data
143 int mb_size; ///< macroblock size
144 int blk_size; ///< block size
145 int is_halfpel; ///< precision of the motion compensation: 0 - fullpel, 1 - halfpel
146 int inherit_mv; ///< tells if motion vector is inherited from reference macroblock
147 int inherit_qdelta; ///< tells if quantiser delta is inherited from reference macroblock
148 int qdelta_present; ///< tells if Qdelta signal is present in the bitstream (Indeo5 only)
149 int quant_mat; ///< dequant matrix index
150 int glob_quant; ///< quant base for this band
151 const uint8_t *scan; ///< ptr to the scan pattern
152 int scan_size; ///< size of the scantable
154 IVIHuffTab blk_vlc; ///< vlc table for decoding block data
156 int num_corr; ///< number of correction entries
157 uint8_t corr[61*2]; ///< rvmap correction pairs
158 int rvmap_sel; ///< rvmap table selector
159 RVMapDesc *rv_map; ///< ptr to the RLE table for this band
160 int num_tiles; ///< number of tiles in this band
161 IVITile *tiles; ///< array of tile descriptors
162 InvTransformPtr *inv_transform;
163 DCTransformPtr *dc_transform;
164 int is_2d_trans; ///< 1 indicates that the two-dimensional inverse transform is used
165 int transform_size; ///< block size of the transform
166 int32_t checksum; ///< for debug purposes
167 int checksum_present;
168 int bufsize; ///< band buffer size in bytes
169 const uint16_t *intra_base; ///< quantization matrix for intra blocks
170 const uint16_t *inter_base; ///< quantization matrix for inter blocks
171 const uint8_t *intra_scale; ///< quantization coefficient for intra blocks
172 const uint8_t *inter_scale; ///< quantization coefficient for inter blocks
177 * color plane (luma or chroma) information
179 typedef struct IVIPlaneDesc {
182 uint8_t num_bands; ///< number of bands this plane subdivided into
183 IVIBandDesc *bands; ///< array of band descriptors
187 typedef struct IVIPicConfig {
190 uint16_t chroma_width;
191 uint16_t chroma_height;
193 uint16_t tile_height;
195 uint8_t chroma_bands;
198 typedef struct IVI45DecContext {
200 RVMapDesc rvmap_tabs[9]; ///< local corrected copy of the static rvmap tables
204 int prev_frame_type; ///< frame type of the previous frame
205 uint32_t data_size; ///< size of the frame data in bytes from picture header
207 int transp_status; ///< transparency mode status: 1 - enabled
208 const uint8_t *frame_data; ///< input frame data pointer
209 int inter_scal; ///< signals a sequence of scalable inter frames
210 uint32_t frame_size; ///< frame size in bytes
211 uint32_t pic_hdr_size; ///< picture header size in bytes
213 uint16_t checksum; ///< frame checksum
215 IVIPicConfig pic_conf;
216 IVIPlaneDesc planes[3]; ///< color planes
218 int buf_switch; ///< used to switch between three buffers
219 int dst_buf; ///< buffer index for the currently decoded frame
220 int ref_buf; ///< inter frame reference buffer index
221 int ref2_buf; ///< temporal storage for switching buffers
223 IVIHuffTab mb_vlc; ///< current macroblock table descriptor
224 IVIHuffTab blk_vlc; ///< current block table descriptor
228 uint8_t in_q; ///< flag for explicitly stored quantiser delta
229 uint8_t pic_glob_quant;
232 uint16_t gop_hdr_size;
236 #if IVI4_STREAM_ANALYSER
237 uint8_t has_b_frames;
241 uint8_t uses_fullpel;
244 int (*decode_pic_hdr) (struct IVI45DecContext *ctx, AVCodecContext *avctx);
245 int (*decode_band_hdr) (struct IVI45DecContext *ctx, IVIBandDesc *band, AVCodecContext *avctx);
246 int (*decode_mb_info) (struct IVI45DecContext *ctx, IVIBandDesc *band, IVITile *tile, AVCodecContext *avctx);
247 void (*switch_buffers) (struct IVI45DecContext *ctx);
248 int (*is_nonnull_frame)(struct IVI45DecContext *ctx);
254 /** compare some properties of two pictures */
255 static inline int ivi_pic_config_cmp(IVIPicConfig *str1, IVIPicConfig *str2)
257 return str1->pic_width != str2->pic_width || str1->pic_height != str2->pic_height ||
258 str1->chroma_width != str2->chroma_width || str1->chroma_height != str2->chroma_height ||
259 str1->tile_width != str2->tile_width || str1->tile_height != str2->tile_height ||
260 str1->luma_bands != str2->luma_bands || str1->chroma_bands != str2->chroma_bands;
263 /** calculate number of tiles in a stride */
264 #define IVI_NUM_TILES(stride, tile_size) (((stride) + (tile_size) - 1) / (tile_size))
266 /** calculate number of macroblocks in a tile */
267 #define IVI_MBs_PER_TILE(tile_width, tile_height, mb_size) \
268 ((((tile_width) + (mb_size) - 1) / (mb_size)) * (((tile_height) + (mb_size) - 1) / (mb_size)))
270 /** convert unsigned values into signed ones (the sign is in the LSB) */
271 #define IVI_TOSIGNED(val) (-(((val) >> 1) ^ -((val) & 1)))
273 /** scale motion vector */
274 static inline int ivi_scale_mv(int mv, int mv_scale)
276 return (mv + (mv > 0) + (mv_scale - 1)) >> mv_scale;
280 * Initialize static codes used for macroblock and block decoding.
282 void ff_ivi_init_static_vlc(void);
285 * Decode a huffman codebook descriptor from the bitstream
286 * and select specified huffman table.
288 * @param[in,out] gb the GetBit context
289 * @param[in] desc_coded flag signalling if table descriptor was coded
290 * @param[in] which_tab codebook purpose (IVI_MB_HUFF or IVI_BLK_HUFF)
291 * @param[out] huff_tab pointer to the descriptor of the selected table
292 * @param[in] avctx AVCodecContext pointer
293 * @return zero on success, negative value otherwise
295 int ff_ivi_dec_huff_desc(GetBitContext *gb, int desc_coded, int which_tab,
296 IVIHuffTab *huff_tab, AVCodecContext *avctx);
299 * Initialize planes (prepares descriptors, allocates buffers etc).
301 * @param[in,out] planes pointer to the array of the plane descriptors
302 * @param[in] cfg pointer to the ivi_pic_config structure describing picture layout
303 * @return result code: 0 - OK
305 int ff_ivi_init_planes(IVIPlaneDesc *planes, const IVIPicConfig *cfg);
308 * Initialize tile and macroblock descriptors.
310 * @param[in,out] planes pointer to the array of the plane descriptors
311 * @param[in] tile_width tile width
312 * @param[in] tile_height tile height
313 * @return result code: 0 - OK
315 int ff_ivi_init_tiles(IVIPlaneDesc *planes, int tile_width, int tile_height);
317 int ff_ivi_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
319 int ff_ivi_decode_close(AVCodecContext *avctx);
321 #endif /* AVCODEC_IVI_COMMON_H */