/* * VC-1 and WMV3 decoder * Copyright (c) 2006-2007 Konstantin Shishkov * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer * * This file is part of Libav. * * Libav is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * Libav is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef AVCODEC_VC1_H #define AVCODEC_VC1_H #include "avcodec.h" #include "h264chroma.h" #include "mpegvideo.h" #include "intrax8.h" #include "vc1dsp.h" #define AC_VLC_BITS 9 /** Markers used in VC-1 AP frame data */ //@{ enum VC1Code { VC1_CODE_RES0 = 0x00000100, VC1_CODE_ENDOFSEQ = 0x0000010A, VC1_CODE_SLICE, VC1_CODE_FIELD, VC1_CODE_FRAME, VC1_CODE_ENTRYPOINT, VC1_CODE_SEQHDR, }; //@} #define IS_MARKER(x) (((x) & ~0xFF) == VC1_CODE_RES0) /** Available Profiles */ //@{ enum Profile { PROFILE_SIMPLE, PROFILE_MAIN, PROFILE_COMPLEX, ///< TODO: WMV9 specific PROFILE_ADVANCED }; //@} /** Sequence quantizer mode */ //@{ enum QuantMode { QUANT_FRAME_IMPLICIT, ///< Implicitly specified at frame level QUANT_FRAME_EXPLICIT, ///< Explicitly specified at frame level QUANT_NON_UNIFORM, ///< Non-uniform quant used for all frames QUANT_UNIFORM ///< Uniform quant used for all frames }; //@} /** Where quant can be changed */ //@{ enum DQProfile { DQPROFILE_FOUR_EDGES, DQPROFILE_DOUBLE_EDGES, DQPROFILE_SINGLE_EDGE, DQPROFILE_ALL_MBS }; //@} /** @name Where quant can be changed */ //@{ enum DQSingleEdge { DQSINGLE_BEDGE_LEFT, DQSINGLE_BEDGE_TOP, DQSINGLE_BEDGE_RIGHT, DQSINGLE_BEDGE_BOTTOM }; //@} /** Which pair of edges is quantized with ALTPQUANT */ //@{ enum DQDoubleEdge { DQDOUBLE_BEDGE_TOPLEFT, DQDOUBLE_BEDGE_TOPRIGHT, DQDOUBLE_BEDGE_BOTTOMRIGHT, DQDOUBLE_BEDGE_BOTTOMLEFT }; //@} /** MV modes for P frames */ //@{ enum MVModes { MV_PMODE_1MV_HPEL_BILIN, MV_PMODE_1MV, MV_PMODE_1MV_HPEL, MV_PMODE_MIXED_MV, MV_PMODE_INTENSITY_COMP }; //@} /** MBMODE for interlaced frame P-picture */ //@{ enum MBModesIntfr { MV_PMODE_INTFR_1MV, MV_PMODE_INTFR_2MV_FIELD, MV_PMODE_INTFR_2MV, MV_PMODE_INTFR_4MV_FIELD, MV_PMODE_INTFR_4MV, MV_PMODE_INTFR_INTRA, }; //@} /** @name MV types for B frames */ //@{ enum BMVTypes { BMV_TYPE_BACKWARD, BMV_TYPE_FORWARD, BMV_TYPE_INTERPOLATED, BMV_TYPE_DIRECT }; //@} /** @name Block types for P/B frames */ //@{ enum TransformTypes { TT_8X8, TT_8X4_BOTTOM, TT_8X4_TOP, TT_8X4, // both halves TT_4X8_RIGHT, TT_4X8_LEFT, TT_4X8, // both halves TT_4X4 }; //@} enum CodingSet { CS_HIGH_MOT_INTRA = 0, CS_HIGH_MOT_INTER, CS_LOW_MOT_INTRA, CS_LOW_MOT_INTER, CS_MID_RATE_INTRA, CS_MID_RATE_INTER, CS_HIGH_RATE_INTRA, CS_HIGH_RATE_INTER }; /** @name Overlap conditions for Advanced Profile */ //@{ enum COTypes { CONDOVER_NONE = 0, CONDOVER_ALL, CONDOVER_SELECT }; //@} /** * FCM Frame Coding Mode * @note some content might be marked interlaced * but have fcm set to 0 as well (e.g. HD-DVD) */ enum FrameCodingMode { PROGRESSIVE = 0, ///< in the bitstream is reported as 00b ILACE_FRAME, ///< in the bitstream is reported as 10b ILACE_FIELD ///< in the bitstream is reported as 11b }; /** The VC1 Context * @todo Change size wherever another size is more efficient * Many members are only used for Advanced Profile */ typedef struct VC1Context{ MpegEncContext s; IntraX8Context x8; H264ChromaContext h264chroma; VC1DSPContext vc1dsp; int bits; /** Simple/Main Profile sequence header */ //@{ int res_sprite; ///< reserved, sprite mode int res_y411; ///< reserved, old interlaced mode int res_x8; ///< reserved int multires; ///< frame-level RESPIC syntax element present int res_fasttx; ///< reserved, always 1 int res_transtab; ///< reserved, always 0 int rangered; ///< RANGEREDFRM (range reduction) syntax element present ///< at frame level int res_rtm_flag; ///< reserved, set to 1 int reserved; ///< reserved //@} /** Advanced Profile */ //@{ int level; ///< 3bits, for Advanced/Simple Profile, provided by TS layer int chromaformat; ///< 2bits, 2=4:2:0, only defined int postprocflag; ///< Per-frame processing suggestion flag present int broadcast; ///< TFF/RFF present int interlace; ///< Progressive/interlaced (RPTFTM syntax element) int tfcntrflag; ///< TFCNTR present int panscanflag; ///< NUMPANSCANWIN, TOPLEFT{X,Y}, BOTRIGHT{X,Y} present int refdist_flag; ///< REFDIST syntax element present in II, IP, PI or PP field picture headers int extended_dmv; ///< Additional extended dmv range at P/B frame-level int color_prim; ///< 8bits, chroma coordinates of the color primaries int transfer_char; ///< 8bits, Opto-electronic transfer characteristics int matrix_coef; ///< 8bits, Color primaries->YCbCr transform matrix int hrd_param_flag; ///< Presence of Hypothetical Reference ///< Decoder parameters int psf; ///< Progressive Segmented Frame //@} /** Sequence header data for all Profiles * TODO: choose between ints, uint8_ts and monobit flags */ //@{ int profile; ///< 2bits, Profile int frmrtq_postproc; ///< 3bits, int bitrtq_postproc; ///< 5bits, quantized framerate-based postprocessing strength int fastuvmc; ///< Rounding of qpel vector to hpel ? (not in Simple) int extended_mv; ///< Ext MV in P/B (not in Simple) int dquant; ///< How qscale varies with MBs, 2bits (not in Simple) int vstransform; ///< variable-size [48]x[48] transform type + info int overlap; ///< overlapped transforms in use int quantizer_mode; ///< 2bits, quantizer mode used for sequence, see QUANT_* int finterpflag; ///< INTERPFRM present //@} /** Frame decoding info for all profiles */ //@{ uint8_t mv_mode; ///< MV coding monde uint8_t mv_mode2; ///< Secondary MV coding mode (B frames) int k_x; ///< Number of bits for MVs (depends on MV range) int k_y; ///< Number of bits for MVs (depends on MV range) int range_x, range_y; ///< MV range uint8_t pq, altpq; ///< Current/alternate frame quantizer scale uint8_t zz_8x8[4][64]; ///< Zigzag table for TT_8x8, permuted for IDCT int left_blk_sh, top_blk_sh; ///< Either 3 or 0, positions of l/t in blk[] const uint8_t* zz_8x4; ///< Zigzag scan table for TT_8x4 coding mode const uint8_t* zz_4x8; ///< Zigzag scan table for TT_4x8 coding mode /** pquant parameters */ //@{ uint8_t dquantfrm; uint8_t dqprofile; uint8_t dqsbedge; uint8_t dqbilevel; //@} /** AC coding set indexes * @see 8.1.1.10, p(1)10 */ //@{ int c_ac_table_index; ///< Chroma index from ACFRM element int y_ac_table_index; ///< Luma index from AC2FRM element //@} int ttfrm; ///< Transform type info present at frame level uint8_t ttmbf; ///< Transform type flag int *ttblk_base, *ttblk; ///< Transform type at the block level int codingset; ///< index of current table set from 11.8 to use for luma block decoding int codingset2; ///< index of current table set from 11.8 to use for chroma block decoding int pqindex; ///< raw pqindex used in coding set selection int a_avail, c_avail; uint8_t *mb_type_base, *mb_type[3]; /** Luma compensation parameters */ //@{ uint8_t lumscale; uint8_t lumshift; //@} int16_t bfraction; ///< Relative position % anchors=> how to scale MVs uint8_t halfpq; ///< Uniform quant over image and qp+.5 uint8_t respic; ///< Frame-level flag for resized images int buffer_fullness; ///< HRD info /** Ranges: * -# 0 -> [-64n 63.f] x [-32, 31.f] * -# 1 -> [-128, 127.f] x [-64, 63.f] * -# 2 -> [-512, 511.f] x [-128, 127.f] * -# 3 -> [-1024, 1023.f] x [-256, 255.f] */ uint8_t mvrange; ///< Extended MV range flag uint8_t pquantizer; ///< Uniform (over sequence) quantizer in use VLC *cbpcy_vlc; ///< CBPCY VLC table int tt_index; ///< Index for Transform Type tables (to decode TTMB) uint8_t* mv_type_mb_plane; ///< bitplane for mv_type == (4MV) uint8_t* direct_mb_plane; ///< bitplane for "direct" MBs uint8_t* forward_mb_plane; ///< bitplane for "forward" MBs int mv_type_is_raw; ///< mv type mb plane is not coded int dmb_is_raw; ///< direct mb plane is raw int fmb_is_raw; ///< forward mb plane is raw int skip_is_raw; ///< skip mb plane is not coded uint8_t luty[256], lutuv[256]; ///< lookup tables used for intensity compensation int use_ic; ///< use intensity compensation in B-frames int rnd; ///< rounding control /** Frame decoding info for S/M profiles only */ //@{ uint8_t rangeredfrm; ///< out_sample = CLIP((in_sample-128)*2+128) uint8_t interpfrm; //@} /** Frame decoding info for Advanced profile */ //@{ enum FrameCodingMode fcm; uint8_t numpanscanwin; uint8_t tfcntr; uint8_t rptfrm, tff, rff; uint16_t topleftx; uint16_t toplefty; uint16_t bottomrightx; uint16_t bottomrighty; uint8_t uvsamp; uint8_t postproc; int hrd_num_leaky_buckets; uint8_t bit_rate_exponent; uint8_t buffer_size_exponent; uint8_t* acpred_plane; ///< AC prediction flags bitplane int acpred_is_raw; uint8_t* over_flags_plane; ///< Overflags bitplane int overflg_is_raw; uint8_t condover; uint16_t *hrd_rate, *hrd_buffer; uint8_t *hrd_fullness; uint8_t range_mapy_flag; uint8_t range_mapuv_flag; uint8_t range_mapy; uint8_t range_mapuv; //@} /** Frame decoding info for interlaced picture */ uint8_t dmvrange; ///< Extended differential MV range flag int fourmvswitch; int intcomp; uint8_t lumscale2; ///< for interlaced field P picture uint8_t lumshift2; uint8_t luty2[256], lutuv2[256]; // lookup tables used for intensity compensation VLC* mbmode_vlc; VLC* imv_vlc; VLC* twomvbp_vlc; VLC* fourmvbp_vlc; uint8_t twomvbp; uint8_t fourmvbp; uint8_t* fieldtx_plane; int fieldtx_is_raw; int8_t zzi_8x8[64]; uint8_t *blk_mv_type_base, *blk_mv_type; ///< 0: frame MV, 1: field MV (interlaced frame) uint8_t *mv_f_base, *mv_f[2]; ///< 0: MV obtained from same field, 1: opposite field uint8_t *mv_f_last_base, *mv_f_last[2]; uint8_t *mv_f_next_base, *mv_f_next[2]; int field_mode; ///< 1 for interlaced field pictures int fptype; int second_field; int refdist; ///< distance of the current picture from reference int numref; ///< number of past field pictures used as reference // 0 corresponds to 1 and 1 corresponds to 2 references int reffield; ///< if numref = 0 (1 reference) then reffield decides which // field to use among the two fields from previous frame int intcompfield; ///< which of the two fields to be intensity compensated // 0: both fields, 1: bottom field, 2: top field int cur_field_type; ///< 0: top, 1: bottom int ref_field_type[2]; ///< forward and backward reference field type (top or bottom) int blocks_off, mb_off; int qs_last; ///< if qpel has been used in the previous (tr.) picture int bmvtype; int frfd, brfd; ///< reference frame distance (forward or backward) int pic_header_flag; /** Frame decoding info for sprite modes */ //@{ int new_sprite; int two_sprites; AVFrame sprite_output_frame; int output_width, output_height, sprite_width, sprite_height; uint8_t* sr_rows[2][2]; ///< Sprite resizer line cache //@} int p_frame_skipped; int bi_type; int x8_type; int16_t (*block)[6][64]; int n_allocated_blks, cur_blk_idx, left_blk_idx, topleft_blk_idx, top_blk_idx; uint32_t *cbp_base, *cbp; uint8_t *is_intra_base, *is_intra; int16_t (*luma_mv_base)[2], (*luma_mv)[2]; uint8_t bfraction_lut_index; ///< Index for BFRACTION value (see Table 40, reproduced into ff_vc1_bfraction_lut[]) uint8_t broken_link; ///< Broken link flag (BROKEN_LINK syntax element) uint8_t closed_entry; ///< Closed entry point flag (CLOSED_ENTRY syntax element) int end_mb_x; ///< Horizontal macroblock limit (used only by mss2) int parse_only; ///< Context is used within parser int warn_interlaced; } VC1Context; /** Find VC-1 marker in buffer * @return position where next marker starts or end of buffer if no marker found */ static av_always_inline const uint8_t* find_next_marker(const uint8_t *src, const uint8_t *end) { uint32_t mrk = 0xFFFFFFFF; if (end-src < 4) return end; while (src < end) { mrk = (mrk << 8) | *src++; if (IS_MARKER(mrk)) return src - 4; } return end; } static av_always_inline int vc1_unescape_buffer(const uint8_t *src, int size, uint8_t *dst) { int dsize = 0, i; if (size < 4) { for (dsize = 0; dsize < size; dsize++) *dst++ = *src++; return size; } for (i = 0; i < size; i++, src++) { if (src[0] == 3 && i >= 2 && !src[-1] && !src[-2] && i < size-1 && src[1] < 4) { dst[dsize++] = src[1]; src++; i++; } else dst[dsize++] = *src; } return dsize; } /** * Decode Simple/Main Profiles sequence header * @see Figure 7-8, p16-17 * @param avctx Codec context * @param gb GetBit context initialized from Codec context extra_data * @return Status */ int ff_vc1_decode_sequence_header(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb); int ff_vc1_decode_entry_point(AVCodecContext *avctx, VC1Context *v, GetBitContext *gb); int ff_vc1_parse_frame_header (VC1Context *v, GetBitContext *gb); int ff_vc1_parse_frame_header_adv(VC1Context *v, GetBitContext *gb); int ff_vc1_init_common(VC1Context *v); int ff_vc1_decode_init_alloc_tables(VC1Context *v); void ff_vc1_init_transposed_scantables(VC1Context *v); int ff_vc1_decode_end(AVCodecContext *avctx); void ff_vc1_decode_blocks(VC1Context *v); #endif /* AVCODEC_VC1_H */