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