* 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
*/
#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,
};
//@}
+/** 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_INTERPOLATED,
+ BMV_TYPE_DIRECT
};
//@}
TT_8X8,
TT_8X4_BOTTOM,
TT_8X4_TOP,
- TT_8X4, //Both halves
+ TT_8X4, // both halves
TT_4X8_RIGHT,
TT_4X8_LEFT,
- TT_4X8, //Both halves
+ TT_4X8, // both halves
TT_4X4
};
//@}
};
//@}
+/**
+ * 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
typedef struct VC1Context{
MpegEncContext s;
IntraX8Context x8;
+ VC1DSPContext vc1dsp;
int bits;
/** Simple/Main Profile sequence header */
//@{
- int res_sm; ///< reserved, 2b
+ 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
/** 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
- 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
+ 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;
* @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 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
- uint8_t ttblk4x4; ///< Value of ttblk which indicates a 4x4 transform
- 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 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];
* -# 2 -> [-512, 511.f] x [-128, 127.f]
* -# 3 -> [-1024, 1023.f] x [-256, 255.f]
*/
- uint8_t mvrange;
- uint8_t pquantizer; ///< Uniform (over sequence) quantizer in use
- VLC *cbpcy_vlc; ///< CBPCY VLC table
- int tt_index; ///< Index for Transform Type tables
- uint8_t* mv_type_mb_plane; ///< bitplane for mv_type == (4MV)
- uint8_t* direct_mb_plane; ///< bitplane for "direct" MBs
- int mv_type_is_raw; ///< mv type mb plane is not coded
- int dmb_is_raw; ///< direct 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
+ 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 rangeredfrm; ///< out_sample = CLIP((in_sample-128)*2+128)
uint8_t interpfrm;
//@}
/** Frame decoding info for Advanced profile */
//@{
- uint8_t fcm; ///< 0->Progressive, 2->Frame-Interlace, 3->Field-Interlace
+ enum FrameCodingMode fcm;
uint8_t numpanscanwin;
uint8_t tfcntr;
uint8_t rptfrm, tff, rff;
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 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)
+ 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