* Copyright (c) 2006-2007 Konstantin Shishkov
* Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * 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.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-/** Markers used if VC-1 AP frame data */
+#ifndef AVCODEC_VC1_H
+#define AVCODEC_VC1_H
+
+#include "avcodec.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{
+enum VC1Code {
VC1_CODE_RES0 = 0x00000100,
VC1_CODE_ENDOFSEQ = 0x0000010A,
VC1_CODE_SLICE,
//@}
#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;
+ 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;
+
+ DCTELEM (*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);
+
+av_cold int ff_vc1_decode_init_alloc_tables(VC1Context *v);
+av_cold void ff_vc1_init_transposed_scantables(VC1Context *v);
+av_cold int ff_vc1_decode_end(AVCodecContext *avctx);
+void ff_vc1_decode_blocks(VC1Context *v);
+
+#endif /* AVCODEC_VC1_H */
projects / ffmpeg / blobdiff