2 * VC-1 and WMV3 decoder
3 * Copyright (c) 2006-2007 Konstantin Shishkov
4 * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
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
23 /** Markers used in VC-1 AP frame data */
26 VC1_CODE_RES0 = 0x00000100,
27 VC1_CODE_ENDOFSEQ = 0x0000010A,
36 #define IS_MARKER(x) (((x) & ~0xFF) == VC1_CODE_RES0)
38 #ifndef VC1_PARSER_ONLY
39 /** Available Profiles */
44 PROFILE_COMPLEX, ///< TODO: WMV9 specific
49 /** Sequence quantizer mode */
52 QUANT_FRAME_IMPLICIT, ///< Implicitly specified at frame level
53 QUANT_FRAME_EXPLICIT, ///< Explicitly specified at frame level
54 QUANT_NON_UNIFORM, ///< Non-uniform quant used for all frames
55 QUANT_UNIFORM ///< Uniform quant used for all frames
59 /** Where quant can be changed */
63 DQPROFILE_DOUBLE_EDGES,
64 DQPROFILE_SINGLE_EDGE,
69 /** @name Where quant can be changed
80 /** Which pair of edges is quantized with ALTPQUANT */
83 DQDOUBLE_BEDGE_TOPLEFT,
84 DQDOUBLE_BEDGE_TOPRIGHT,
85 DQDOUBLE_BEDGE_BOTTOMRIGHT,
86 DQDOUBLE_BEDGE_BOTTOMLEFT
90 /** MV modes for P frames */
93 MV_PMODE_1MV_HPEL_BILIN,
97 MV_PMODE_INTENSITY_COMP
101 /** @name MV types for B frames */
106 BMV_TYPE_INTERPOLATED
110 /** @name Block types for P/B frames */
112 enum TransformTypes {
116 TT_8X4, //Both halves
119 TT_4X8, //Both halves
124 /** One more frame type */
128 CS_HIGH_MOT_INTRA = 0,
138 /** @name Overlap conditions for Advanced Profile */
149 * @fixme Change size wherever another size is more efficient
150 * Many members are only used for Advanced Profile
152 typedef struct VC1Context{
157 /** Simple/Main Profile sequence header */
159 int res_sm; ///< reserved, 2b
160 int res_x8; ///< reserved
161 int multires; ///< frame-level RESPIC syntax element present
162 int res_fasttx; ///< reserved, always 1
163 int res_transtab; ///< reserved, always 0
164 int rangered; ///< RANGEREDFRM (range reduction) syntax element present
166 int res_rtm_flag; ///< reserved, set to 1
167 int reserved; ///< reserved
170 /** Advanced Profile */
172 int level; ///< 3bits, for Advanced/Simple Profile, provided by TS layer
173 int chromaformat; ///< 2bits, 2=4:2:0, only defined
174 int postprocflag; ///< Per-frame processing suggestion flag present
175 int broadcast; ///< TFF/RFF present
176 int interlace; ///< Progressive/interlaced (RPTFTM syntax element)
177 int tfcntrflag; ///< TFCNTR present
178 int panscanflag; ///< NUMPANSCANWIN, TOPLEFT{X,Y}, BOTRIGHT{X,Y} present
179 int extended_dmv; ///< Additional extended dmv range at P/B frame-level
180 int color_prim; ///< 8bits, chroma coordinates of the color primaries
181 int transfer_char; ///< 8bits, Opto-electronic transfer characteristics
182 int matrix_coef; ///< 8bits, Color primaries->YCbCr transform matrix
183 int hrd_param_flag; ///< Presence of Hypothetical Reference
184 ///< Decoder parameters
185 int psf; ///< Progressive Segmented Frame
188 /** Sequence header data for all Profiles
189 * TODO: choose between ints, uint8_ts and monobit flags
192 int profile; ///< 2bits, Profile
193 int frmrtq_postproc; ///< 3bits,
194 int bitrtq_postproc; ///< 5bits, quantized framerate-based postprocessing strength
195 int fastuvmc; ///< Rounding of qpel vector to hpel ? (not in Simple)
196 int extended_mv; ///< Ext MV in P/B (not in Simple)
197 int dquant; ///< How qscale varies with MBs, 2bits (not in Simple)
198 int vstransform; ///< variable-size [48]x[48] transform type + info
199 int overlap; ///< overlapped transforms in use
200 int quantizer_mode; ///< 2bits, quantizer mode used for sequence, see QUANT_*
201 int finterpflag; ///< INTERPFRM present
204 /** Frame decoding info for all profiles */
206 uint8_t mv_mode; ///< MV coding monde
207 uint8_t mv_mode2; ///< Secondary MV coding mode (B frames)
208 int k_x; ///< Number of bits for MVs (depends on MV range)
209 int k_y; ///< Number of bits for MVs (depends on MV range)
210 int range_x, range_y; ///< MV range
211 uint8_t pq, altpq; ///< Current/alternate frame quantizer scale
212 /** pquant parameters */
219 /** AC coding set indexes
220 * @see 8.1.1.10, p(1)10
223 int c_ac_table_index; ///< Chroma index from ACFRM element
224 int y_ac_table_index; ///< Luma index from AC2FRM element
226 int ttfrm; ///< Transform type info present at frame level
227 uint8_t ttmbf; ///< Transform type flag
228 uint8_t ttblk4x4; ///< Value of ttblk which indicates a 4x4 transform
229 int codingset; ///< index of current table set from 11.8 to use for luma block decoding
230 int codingset2; ///< index of current table set from 11.8 to use for chroma block decoding
231 int pqindex; ///< raw pqindex used in coding set selection
232 int a_avail, c_avail;
233 uint8_t *mb_type_base, *mb_type[3];
236 /** Luma compensation parameters */
241 int16_t bfraction; ///< Relative position % anchors=> how to scale MVs
242 uint8_t halfpq; ///< Uniform quant over image and qp+.5
243 uint8_t respic; ///< Frame-level flag for resized images
244 int buffer_fullness; ///< HRD info
246 * -# 0 -> [-64n 63.f] x [-32, 31.f]
247 * -# 1 -> [-128, 127.f] x [-64, 63.f]
248 * -# 2 -> [-512, 511.f] x [-128, 127.f]
249 * -# 3 -> [-1024, 1023.f] x [-256, 255.f]
252 uint8_t pquantizer; ///< Uniform (over sequence) quantizer in use
253 VLC *cbpcy_vlc; ///< CBPCY VLC table
254 int tt_index; ///< Index for Transform Type tables
255 uint8_t* mv_type_mb_plane; ///< bitplane for mv_type == (4MV)
256 uint8_t* direct_mb_plane; ///< bitplane for "direct" MBs
257 int mv_type_is_raw; ///< mv type mb plane is not coded
258 int dmb_is_raw; ///< direct mb plane is raw
259 int skip_is_raw; ///< skip mb plane is not coded
260 uint8_t luty[256], lutuv[256]; // lookup tables used for intensity compensation
261 int use_ic; ///< use intensity compensation in B-frames
262 int rnd; ///< rounding control
264 /** Frame decoding info for S/M profiles only */
266 uint8_t rangeredfrm; ///< out_sample = CLIP((in_sample-128)*2+128)
270 /** Frame decoding info for Advanced profile */
272 uint8_t fcm; ///< 0->Progressive, 2->Frame-Interlace, 3->Field-Interlace
273 uint8_t numpanscanwin;
275 uint8_t rptfrm, tff, rff;
278 uint16_t bottomrightx;
279 uint16_t bottomrighty;
282 int hrd_num_leaky_buckets;
283 uint8_t bit_rate_exponent;
284 uint8_t buffer_size_exponent;
285 uint8_t* acpred_plane; ///< AC prediction flags bitplane
287 uint8_t* over_flags_plane; ///< Overflags bitplane
290 uint16_t *hrd_rate, *hrd_buffer;
291 uint8_t *hrd_fullness;
292 uint8_t range_mapy_flag;
293 uint8_t range_mapuv_flag;