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1a268accb5
FFmpeg/libavcodec/vc1.c
Kostya Shishkov 87dfe848fa Some optimization and fixes - mostly reworked MC and bitplanes. 
Originally committed as revision 5543 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-06-29 11:05:33 +00:00

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/*
* VC-1 and WMV3 decoder
* Copyright (c) 2006 Konstantin Shishkov
* Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
/**
* @file vc1.c
* VC-1 and WMV3 decoder
*
*/
#include "common.h"
#include "dsputil.h"
#include "avcodec.h"
#include "mpegvideo.h"
#include "vc1data.h"
#include "vc1acdata.h"
#undef NDEBUG
#include <assert.h>
extern const uint32_t ff_table0_dc_lum[120][2], ff_table1_dc_lum[120][2];
extern const uint32_t ff_table0_dc_chroma[120][2], ff_table1_dc_chroma[120][2];
extern VLC ff_msmp4_dc_luma_vlc[2], ff_msmp4_dc_chroma_vlc[2];
#define MB_INTRA_VLC_BITS 9
extern VLC ff_msmp4_mb_i_vlc;
extern const uint16_t ff_msmp4_mb_i_table[64][2];
#define DC_VLC_BITS 9
#define AC_VLC_BITS 9
static const uint16_t table_mb_intra[64][2];
/** 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
};
//@}
/** @name MV types for B frames */
//@{
enum BMVTypes {
BMV_TYPE_BACKWARD,
BMV_TYPE_FORWARD,
BMV_TYPE_INTERPOLATED = 3 //XXX: ??
};
//@}
/** @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
};
//@}
/** Table for conversion between TTBLK and TTMB */
static const int ttblk_to_tt[3][8] = {
{ TT_8X4, TT_4X8, TT_8X8, TT_4X4, TT_8X4_TOP, TT_8X4_BOTTOM, TT_4X8_RIGHT, TT_4X8_LEFT },
{ TT_8X8, TT_4X8_RIGHT, TT_4X8_LEFT, TT_4X4, TT_8X4, TT_4X8, TT_8X4_BOTTOM, TT_8X4_TOP },
{ TT_8X8, TT_4X8, TT_4X4, TT_8X4_BOTTOM, TT_4X8_RIGHT, TT_4X8_LEFT, TT_8X4, TT_8X4_TOP }
};
/** MV P mode - the 5th element is only used for mode 1 */
static const uint8_t mv_pmode_table[2][5] = {
{ MV_PMODE_1MV_HPEL_BILIN, MV_PMODE_1MV, MV_PMODE_1MV_HPEL, MV_PMODE_INTENSITY_COMP, MV_PMODE_MIXED_MV },
{ MV_PMODE_1MV, MV_PMODE_MIXED_MV, MV_PMODE_1MV_HPEL, MV_PMODE_INTENSITY_COMP, MV_PMODE_1MV_HPEL_BILIN }
};
/** One more frame type */
#define BI_TYPE 7
static const int fps_nr[5] = { 24, 25, 30, 50, 60 },
fps_dr[2] = { 1000, 1001 };
static const uint8_t pquant_table[3][32] = {
{ /* Implicit quantizer */
0, 1, 2, 3, 4, 5, 6, 7, 8, 6, 7, 8, 9, 10, 11, 12,
13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 27, 29, 31
},
{ /* Explicit quantizer, pquantizer uniform */
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
},
{ /* Explicit quantizer, pquantizer non-uniform */
0, 1, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 29, 31
}
};
/** @name VC-1 VLC tables and defines
* @todo TODO move this into the context
*/
//@{
#define VC1_BFRACTION_VLC_BITS 7
static VLC vc1_bfraction_vlc;
#define VC1_IMODE_VLC_BITS 4
static VLC vc1_imode_vlc;
#define VC1_NORM2_VLC_BITS 3
static VLC vc1_norm2_vlc;
#define VC1_NORM6_VLC_BITS 9
static VLC vc1_norm6_vlc;
/* Could be optimized, one table only needs 8 bits */
#define VC1_TTMB_VLC_BITS 9 //12
static VLC vc1_ttmb_vlc[3];
#define VC1_MV_DIFF_VLC_BITS 9 //15
static VLC vc1_mv_diff_vlc[4];
#define VC1_CBPCY_P_VLC_BITS 9 //14
static VLC vc1_cbpcy_p_vlc[4];
#define VC1_4MV_BLOCK_PATTERN_VLC_BITS 6
static VLC vc1_4mv_block_pattern_vlc[4];
#define VC1_TTBLK_VLC_BITS 5
static VLC vc1_ttblk_vlc[3];
#define VC1_SUBBLKPAT_VLC_BITS 6
static VLC vc1_subblkpat_vlc[3];
static VLC vc1_ac_coeff_table[8];
//@}
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
};
/** The VC1 Context
* @fixme Change size wherever another size is more efficient
* Many members are only used for Advanced Profile
*/
typedef struct VC1Context{
MpegEncContext s;
int bits;
/** Simple/Main Profile sequence header */
//@{
int res_sm; ///< reserved, 2b
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 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
//@}
/** 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
/** 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 ttmb; ///< Transform type
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 a_avail, c_avail;
/** 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;
uint8_t pquantizer; ///< Uniform (over sequence) quantizer in use
uint8_t *previous_line_cbpcy; ///< To use for predicted CBPCY
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* skip_mb_plane; ///< bitplane for skipped MBs
// BitPlane direct_mb_plane; ///< bitplane for "direct" MBs
int mv_type_is_raw; ///< mv type mb plane is not coded
int skip_is_raw; ///< skip mb plane is not coded
/** 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 */
//@{
uint8_t fcm; ///< 0->Progressive, 2->Frame-Interlace, 3->Field-Interlace
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;
// BitPlane ac_pred_plane; ///< AC prediction flags bitplane
// BitPlane over_flags_plane; ///< Overflags bitplane
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;
//@}
} VC1Context;
/**
* Get unary code of limited length
* @fixme FIXME Slow and ugly
* @param gb GetBitContext
* @param[in] stop The bitstop value (unary code of 1's or 0's)
* @param[in] len Maximum length
* @return Unary length/index
*/
static int get_prefix(GetBitContext *gb, int stop, int len)
{
#if 1
int i;
for(i = 0; i < len && get_bits1(gb) != stop; i++);
return i;
/* int i = 0, tmp = !stop;
while (i != len && tmp != stop)
{
tmp = get_bits(gb, 1);
i++;
}
if (i == len && tmp != stop) return len+1;
return i;*/
#else
unsigned int buf;
int log;
OPEN_READER(re, gb);
UPDATE_CACHE(re, gb);
buf=GET_CACHE(re, gb); //Still not sure
if (stop) buf = ~buf;
log= av_log2(-buf); //FIXME: -?
if (log < limit){
LAST_SKIP_BITS(re, gb, log+1);
CLOSE_READER(re, gb);
return log;
}
LAST_SKIP_BITS(re, gb, limit);
CLOSE_READER(re, gb);
return limit;
#endif
}
static inline int decode210(GetBitContext *gb){
int n;
n = get_bits1(gb);
if (n == 1)
return 0;
else
return 2 - get_bits1(gb);
}
/**
* Init VC-1 specific tables and VC1Context members
* @param v The VC1Context to initialize
* @return Status
*/
static int vc1_init_common(VC1Context *v)
{
static int done = 0;
int i = 0;
v->hrd_rate = v->hrd_buffer = NULL;
/* VLC tables */
if(!done)
{
done = 1;
init_vlc(&vc1_bfraction_vlc, VC1_BFRACTION_VLC_BITS, 23,
vc1_bfraction_bits, 1, 1,
vc1_bfraction_codes, 1, 1, 1);
init_vlc(&vc1_norm2_vlc, VC1_NORM2_VLC_BITS, 4,
vc1_norm2_bits, 1, 1,
vc1_norm2_codes, 1, 1, 1);
init_vlc(&vc1_norm6_vlc, VC1_NORM6_VLC_BITS, 64,
vc1_norm6_bits, 1, 1,
vc1_norm6_codes, 2, 2, 1);
init_vlc(&vc1_imode_vlc, VC1_IMODE_VLC_BITS, 7,
vc1_imode_bits, 1, 1,
vc1_imode_codes, 1, 1, 1);
for (i=0; i<3; i++)
{
init_vlc(&vc1_ttmb_vlc[i], VC1_TTMB_VLC_BITS, 16,
vc1_ttmb_bits[i], 1, 1,
vc1_ttmb_codes[i], 2, 2, 1);
init_vlc(&vc1_ttblk_vlc[i], VC1_TTBLK_VLC_BITS, 8,
vc1_ttblk_bits[i], 1, 1,
vc1_ttblk_codes[i], 1, 1, 1);
init_vlc(&vc1_subblkpat_vlc[i], VC1_SUBBLKPAT_VLC_BITS, 15,
vc1_subblkpat_bits[i], 1, 1,
vc1_subblkpat_codes[i], 1, 1, 1);
}
for(i=0; i<4; i++)
{
init_vlc(&vc1_4mv_block_pattern_vlc[i], VC1_4MV_BLOCK_PATTERN_VLC_BITS, 16,
vc1_4mv_block_pattern_bits[i], 1, 1,
vc1_4mv_block_pattern_codes[i], 1, 1, 1);
init_vlc(&vc1_cbpcy_p_vlc[i], VC1_CBPCY_P_VLC_BITS, 64,
vc1_cbpcy_p_bits[i], 1, 1,
vc1_cbpcy_p_codes[i], 2, 2, 1);
init_vlc(&vc1_mv_diff_vlc[i], VC1_MV_DIFF_VLC_BITS, 73,
vc1_mv_diff_bits[i], 1, 1,
vc1_mv_diff_codes[i], 2, 2, 1);
}
for(i=0; i<8; i++)
init_vlc(&vc1_ac_coeff_table[i], AC_VLC_BITS, vc1_ac_sizes[i],
&vc1_ac_tables[i][0][1], 8, 4,
&vc1_ac_tables[i][0][0], 8, 4, 1);
init_vlc(&ff_msmp4_mb_i_vlc, MB_INTRA_VLC_BITS, 64,
&ff_msmp4_mb_i_table[0][1], 4, 2,
&ff_msmp4_mb_i_table[0][0], 4, 2, 1);
}
/* Other defaults */
v->pq = -1;
v->mvrange = 0; /* 7.1.1.18, p80 */
return 0;
}
/***********************************************************************/
/**
* @defgroup bitplane VC9 Bitplane decoding
* @see 8.7, p56
* @{
*/
/** @addtogroup bitplane
* Imode types
* @{
*/
enum Imode {
IMODE_RAW,
IMODE_NORM2,
IMODE_DIFF2,
IMODE_NORM6,
IMODE_DIFF6,
IMODE_ROWSKIP,
IMODE_COLSKIP
};
/** @} */ //imode defines
/** Decode rows by checking if they are skipped
* @param plane Buffer to store decoded bits
* @param[in] width Width of this buffer
* @param[in] height Height of this buffer
* @param[in] stride of this buffer
*/
static void decode_rowskip(uint8_t* plane, int width, int height, int stride, GetBitContext *gb){
int x, y;
for (y=0; y<height; y++){
if (!get_bits(gb, 1)) //rowskip
memset(plane, 0, width);
else
for (x=0; x<width; x++)
plane[x] = get_bits(gb, 1);
plane += stride;
}
}
/** Decode columns by checking if they are skipped
* @param plane Buffer to store decoded bits
* @param[in] width Width of this buffer
* @param[in] height Height of this buffer
* @param[in] stride of this buffer
* @fixme FIXME: Optimize
*/
static void decode_colskip(uint8_t* plane, int width, int height, int stride, GetBitContext *gb){
int x, y;
for (x=0; x<width; x++){
if (!get_bits(gb, 1)) //colskip
for (y=0; y<height; y++)
plane[y*stride] = 0;
else
for (y=0; y<height; y++)
plane[y*stride] = get_bits(gb, 1);
plane ++;
}
}
/** Decode a bitplane's bits
* @param bp Bitplane where to store the decode bits
* @param v VC-1 context for bit reading and logging
* @return Status
* @fixme FIXME: Optimize
* @todo TODO: Decide if a struct is needed
*/
static int bitplane_decoding(uint8_t* data, int *raw_flag, VC1Context *v)
{
GetBitContext *gb = &v->s.gb;
int imode, x, y, code, offset;
uint8_t invert, *planep = data;
int width, height, stride;
width = v->s.mb_width;
height = v->s.mb_height;
stride = v->s.mb_stride;
invert = get_bits(gb, 1);
imode = get_vlc2(gb, vc1_imode_vlc.table, VC1_IMODE_VLC_BITS, 1);
*raw_flag = 0;
switch (imode)
{
case IMODE_RAW:
//Data is actually read in the MB layer (same for all tests == "raw")
*raw_flag = 1; //invert ignored
return invert;
case IMODE_DIFF2:
case IMODE_NORM2:
if ((height * width) & 1)
{
*planep++ = get_bits(gb, 1);
offset = 1;
}
else offset = 0;
// decode bitplane as one long line
for (y = offset; y < height * width; y += 2) {
code = get_vlc2(gb, vc1_norm2_vlc.table, VC1_NORM2_VLC_BITS, 1);
*planep++ = code & 1;
offset++;
if(offset == width) {
offset = 0;
planep += stride - width;
}
*planep++ = code >> 1;
offset++;
if(offset == width) {
offset = 0;
planep += stride - width;
}
}
break;
case IMODE_DIFF6:
case IMODE_NORM6:
if(!(height % 3) && (width % 3)) { // use 2x3 decoding
for(y = 0; y < height; y+= 3) {
for(x = width & 1; x < width; x += 2) {
code = get_vlc2(gb, vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);
if(code < 0){
av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
return -1;
}
planep[x + 0] = (code >> 0) & 1;
planep[x + 1] = (code >> 1) & 1;
planep[x + 0 + stride] = (code >> 2) & 1;
planep[x + 1 + stride] = (code >> 3) & 1;
planep[x + 0 + stride * 2] = (code >> 4) & 1;
planep[x + 1 + stride * 2] = (code >> 5) & 1;
}
planep += stride * 3;
}
if(width & 1) decode_colskip(data, 1, height, stride, &v->s.gb);
} else { // 3x2
for(y = height & 1; y < height; y += 2) {
for(x = width % 3; x < width; x += 3) {
code = get_vlc2(gb, vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);
if(code < 0){
av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");
return -1;
}
planep[x + 0] = (code >> 0) & 1;
planep[x + 1] = (code >> 1) & 1;
planep[x + 2] = (code >> 2) & 1;
planep[x + 0 + stride] = (code >> 3) & 1;
planep[x + 1 + stride] = (code >> 4) & 1;
planep[x + 2 + stride] = (code >> 5) & 1;
}
planep += stride * 2;
}
x = width % 3;
if(x) decode_colskip(data , x, height , stride, &v->s.gb);
if(height & 1) decode_rowskip(data+x, width - x, 1, stride, &v->s.gb);
}
break;
case IMODE_ROWSKIP:
decode_rowskip(data, width, height, stride, &v->s.gb);
break;
case IMODE_COLSKIP:
decode_colskip(data, width, height, stride, &v->s.gb);
break;
default: break;
}
/* Applying diff operator */
if (imode == IMODE_DIFF2 || imode == IMODE_DIFF6)
{
planep = data;
planep[0] ^= invert;
for (x=1; x<width; x++)
planep[x] ^= planep[x-1];
for (y=1; y<height; y++)
{
planep += stride;
planep[0] ^= planep[-stride];
for (x=1; x<width; x++)
{
if (planep[x-1] != planep[x-stride]) planep[x] ^= invert;
else planep[x] ^= planep[x-1];
}
}
}
else if (invert)
{
planep = data;
for (x=0; x<stride*height; x++) planep[x] = !planep[x]; //FIXME stride
}
return (imode<<1) + invert;
}
/** @} */ //Bitplane group
/***********************************************************************/
/** VOP Dquant decoding
* @param v VC-1 Context
*/
static int vop_dquant_decoding(VC1Context *v)
{
GetBitContext *gb = &v->s.gb;
int pqdiff;
//variable size
if (v->dquant == 2)
{
pqdiff = get_bits(gb, 3);
if (pqdiff == 7) v->altpq = get_bits(gb, 5);
else v->altpq = v->pq + pqdiff + 1;
}
else
{
v->dquantfrm = get_bits(gb, 1);
if ( v->dquantfrm )
{
v->dqprofile = get_bits(gb, 2);
switch (v->dqprofile)
{
case DQPROFILE_SINGLE_EDGE:
case DQPROFILE_DOUBLE_EDGES:
v->dqsbedge = get_bits(gb, 2);
break;
case DQPROFILE_ALL_MBS:
v->dqbilevel = get_bits(gb, 1);
default: break; //Forbidden ?
}
if (!v->dqbilevel || v->dqprofile != DQPROFILE_ALL_MBS)
{
pqdiff = get_bits(gb, 3);
if (pqdiff == 7) v->altpq = get_bits(gb, 5);
else v->altpq = v->pq + pqdiff + 1;
}
}
}
return 0;
}
/** Do inverse transform
*/
static void vc1_inv_trans(DCTELEM block[64], int M, int N)
{
int i;
register int t1,t2,t3,t4,t5,t6,t7,t8;
DCTELEM *src, *dst;
src = block;
dst = block;
if(M==4){
for(i = 0; i < N; i++){
t1 = 17 * (src[0] + src[2]);
t2 = 17 * (src[0] - src[2]);
t3 = 22 * src[1];
t4 = 22 * src[3];
t5 = 10 * src[1];
t6 = 10 * src[3];
dst[0] = (t1 + t3 + t6 + 4) >> 3;
dst[1] = (t2 - t4 + t5 + 4) >> 3;
dst[2] = (t2 + t4 - t5 + 4) >> 3;
dst[3] = (t1 - t3 - t6 + 4) >> 3;
src += 8;
dst += 8;
}
}else{
for(i = 0; i < N; i++){
t1 = 12 * (src[0] + src[4]);
t2 = 12 * (src[0] - src[4]);
t3 = 16 * src[2] + 6 * src[6];
t4 = 6 * src[2] - 16 * src[6];
t5 = t1 + t3;
t6 = t2 + t4;
t7 = t2 - t4;
t8 = t1 - t3;
t1 = 16 * src[1] + 15 * src[3] + 9 * src[5] + 4 * src[7];
t2 = 15 * src[1] - 4 * src[3] - 16 * src[5] - 9 * src[7];
t3 = 9 * src[1] - 16 * src[3] + 4 * src[5] + 15 * src[7];
t4 = 4 * src[1] - 9 * src[3] + 15 * src[5] - 16 * src[7];
dst[0] = (t5 + t1 + 4) >> 3;
dst[1] = (t6 + t2 + 4) >> 3;
dst[2] = (t7 + t3 + 4) >> 3;
dst[3] = (t8 + t4 + 4) >> 3;
dst[4] = (t8 - t4 + 4) >> 3;
dst[5] = (t7 - t3 + 4) >> 3;
dst[6] = (t6 - t2 + 4) >> 3;
dst[7] = (t5 - t1 + 4) >> 3;
src += 8;
dst += 8;
}
}
src = block;
dst = block;
if(N==4){
for(i = 0; i < M; i++){
t1 = 17 * (src[ 0] + src[16]);
t2 = 17 * (src[ 0] - src[16]);
t3 = 22 * src[ 8];
t4 = 22 * src[24];
t5 = 10 * src[ 8];
t6 = 10 * src[24];
dst[ 0] = (t1 + t3 + t6 + 64) >> 7;
dst[ 8] = (t2 - t4 + t5 + 64) >> 7;
dst[16] = (t2 + t4 - t5 + 64) >> 7;
dst[24] = (t1 - t3 - t6 + 64) >> 7;
src ++;
dst ++;
}
}else{
for(i = 0; i < M; i++){
t1 = 12 * (src[ 0] + src[32]);
t2 = 12 * (src[ 0] - src[32]);
t3 = 16 * src[16] + 6 * src[48];
t4 = 6 * src[16] - 16 * src[48];
t5 = t1 + t3;
t6 = t2 + t4;
t7 = t2 - t4;
t8 = t1 - t3;
t1 = 16 * src[ 8] + 15 * src[24] + 9 * src[40] + 4 * src[56];
t2 = 15 * src[ 8] - 4 * src[24] - 16 * src[40] - 9 * src[56];
t3 = 9 * src[ 8] - 16 * src[24] + 4 * src[40] + 15 * src[56];
t4 = 4 * src[ 8] - 9 * src[24] + 15 * src[40] - 16 * src[56];
dst[ 0] = (t5 + t1 + 64) >> 7;
dst[ 8] = (t6 + t2 + 64) >> 7;
dst[16] = (t7 + t3 + 64) >> 7;
dst[24] = (t8 + t4 + 64) >> 7;
dst[32] = (t8 - t4 + 64 + 1) >> 7;
dst[40] = (t7 - t3 + 64 + 1) >> 7;
dst[48] = (t6 - t2 + 64 + 1) >> 7;
dst[56] = (t5 - t1 + 64 + 1) >> 7;
src++;
dst++;
}
}
}
/** Apply overlap transform
* @todo optimize
* @todo move to DSPContext
*/
static void vc1_overlap_block(MpegEncContext *s, DCTELEM block[64], int n, int do_hor, int do_vert)
{
int i;
if(do_hor) { //TODO
}
if(do_vert) { //TODO
}
for(i = 0; i < 64; i++)
block[i] += 128;
}
static void vc1_v_overlap(uint8_t* src, int stride)
{
int i;
int a, b, c, d;
for(i = 0; i < 8; i++) {
a = src[-2*stride];
b = src[-stride];
c = src[0];
d = src[stride];
src[-2*stride] = (7*a + d) >> 3;
src[-stride] = (-a + 7*b + c + d) >> 3;
src[0] = (a + b + 7*c - d) >> 3;
src[stride] = (a + 7*d) >> 3;
src++;
}
}
static void vc1_h_overlap(uint8_t* src, int stride)
{
int i;
int a, b, c, d;
for(i = 0; i < 8; i++) {
a = src[-2];
b = src[-1];
c = src[0];
d = src[1];
src[-2] = (7*a + d) >> 3;
src[-1] = (-a + 7*b + c + d) >> 3;
src[0] = (a + b + 7*c - d) >> 3;
src[1] = (a + 7*d) >> 3;
src += stride;
}
}
/** Put block onto picture
* @todo move to DSPContext
*/
static void vc1_put_block(VC1Context *v, DCTELEM block[6][64])
{
uint8_t *Y;
int ys, us, vs;
DSPContext *dsp = &v->s.dsp;
ys = v->s.current_picture.linesize[0];
us = v->s.current_picture.linesize[1];
vs = v->s.current_picture.linesize[2];
Y = v->s.dest[0];
dsp->put_pixels_clamped(block[0], Y, ys);
dsp->put_pixels_clamped(block[1], Y + 8, ys);
Y += ys * 8;
dsp->put_pixels_clamped(block[2], Y, ys);
dsp->put_pixels_clamped(block[3], Y + 8, ys);
dsp->put_pixels_clamped(block[4], v->s.dest[1], us);
dsp->put_pixels_clamped(block[5], v->s.dest[2], vs);
}
/* clip motion vector as specified in 8.3.6.5 */
#define CLIP_RANGE(mv, src, lim, bs) \
if(mv < -bs) mv = -bs - src * bs; \
if(mv > lim) mv = lim - src * bs;
/** Do motion compensation over 1 macroblock
* Mostly adapted hpel_motion and qpel_motion from mpegvideo.c
*/
static void vc1_mc_1mv(VC1Context *v)
{
MpegEncContext *s = &v->s;
DSPContext *dsp = &v->s.dsp;
uint8_t *srcY, *srcU, *srcV;
int dxy, uvdxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;
if(!v->s.last_picture.data[0])return;
mx = s->mv[0][0][0];
my = s->mv[0][0][1];
uvmx = (mx + ((mx & 3) == 3)) >> 1;
uvmy = (my + ((my & 3) == 3)) >> 1;
srcY = s->last_picture.data[0];
srcU = s->last_picture.data[1];
srcV = s->last_picture.data[2];
if(v->fastuvmc) { // XXX: 8.3.5.4.5 specifies something different
uvmx = (uvmx + 1) >> 1;
uvmy = (uvmy + 1) >> 1;
}
src_x = s->mb_x * 16 + (mx >> 2);
src_y = s->mb_y * 16 + (my >> 2);
uvsrc_x = s->mb_x * 8 + (uvmx >> 2);
uvsrc_y = s->mb_y * 8 + (uvmy >> 2);
CLIP_RANGE( src_x, s->mb_x, s->mb_width * 16, 16);
CLIP_RANGE( src_y, s->mb_y, s->mb_height * 16, 16);
CLIP_RANGE(uvsrc_x, s->mb_x, s->mb_width * 8, 8);
CLIP_RANGE(uvsrc_y, s->mb_y, s->mb_height * 8, 8);
srcY += src_y * s->linesize + src_x;
srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
srcV += uvsrc_y * s->uvlinesize + uvsrc_x;
if((unsigned)src_x > s->h_edge_pos - (mx&3) - 16
|| (unsigned)src_y > s->v_edge_pos - (my&3) - 16){
uint8_t *uvbuf= s->edge_emu_buffer + 18 * s->linesize;
ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 16+1, 16+1,
src_x, src_y, s->h_edge_pos, s->v_edge_pos);
srcY = s->edge_emu_buffer;
ff_emulated_edge_mc(uvbuf , srcU, s->uvlinesize, 8+1, 8+1,
uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
ff_emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, 8+1, 8+1,
uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);
srcU = uvbuf;
srcV = uvbuf + 16;
}
if(!s->quarter_sample) { // hpel mc
mx >>= 1;
my >>= 1;
uvmx >>= 1;
uvmy >>= 1;
dxy = ((my & 1) << 1) | (mx & 1);
uvdxy = 0;
dsp->put_no_rnd_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);
} else {
dxy = ((my & 3) << 2) | (mx & 3);
uvdxy = ((uvmy & 1) << 1) | (uvmx & 1);
dsp->put_no_rnd_qpel_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize);
}
dsp->put_mspel_pixels_tab[uvdxy](s->dest[1], srcU, s->uvlinesize);
dsp->put_mspel_pixels_tab[uvdxy](s->dest[2], srcV, s->uvlinesize);
}
/**
* 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
*/
static int decode_sequence_header(AVCodecContext *avctx, GetBitContext *gb)
{
VC1Context *v = avctx->priv_data;
av_log(avctx, AV_LOG_INFO, "Header: %0X\n", show_bits(gb, 32));
v->profile = get_bits(gb, 2);
if (v->profile == 2)
{
av_log(avctx, AV_LOG_ERROR, "Profile value 2 is forbidden (and WMV3 Complex Profile is unsupported)\n");
return -1;
}
if (v->profile == PROFILE_ADVANCED)
{
v->level = get_bits(gb, 3);
if(v->level >= 5)
{
av_log(avctx, AV_LOG_ERROR, "Reserved LEVEL %i\n",v->level);
}
v->chromaformat = get_bits(gb, 2);
if (v->chromaformat != 1)
{
av_log(avctx, AV_LOG_ERROR,
"Only 4:2:0 chroma format supported\n");
return -1;
}
}
else
{
v->res_sm = get_bits(gb, 2); //reserved
if (v->res_sm)
{
av_log(avctx, AV_LOG_ERROR,
"Reserved RES_SM=%i is forbidden\n", v->res_sm);
return -1;
}
}
// (fps-2)/4 (->30)
v->frmrtq_postproc = get_bits(gb, 3); //common
// (bitrate-32kbps)/64kbps
v->bitrtq_postproc = get_bits(gb, 5); //common
v->s.loop_filter = get_bits(gb, 1); //common
if(v->s.loop_filter == 1 && v->profile == PROFILE_SIMPLE)
{
av_log(avctx, AV_LOG_ERROR,
"LOOPFILTER shell not be enabled in simple profile\n");
}
if (v->profile < PROFILE_ADVANCED)
{
v->res_x8 = get_bits(gb, 1); //reserved
if (v->res_x8)
{
av_log(avctx, AV_LOG_ERROR,
"1 for reserved RES_X8 is forbidden\n");
//return -1;
}
v->multires = get_bits(gb, 1);
v->res_fasttx = get_bits(gb, 1);
if (!v->res_fasttx)
{
av_log(avctx, AV_LOG_ERROR,
"0 for reserved RES_FASTTX is forbidden\n");
//return -1;
}
}
v->fastuvmc = get_bits(gb, 1); //common
if (!v->profile && !v->fastuvmc)
{
av_log(avctx, AV_LOG_ERROR,
"FASTUVMC unavailable in Simple Profile\n");
return -1;
}
v->extended_mv = get_bits(gb, 1); //common
if (!v->profile && v->extended_mv)
{
av_log(avctx, AV_LOG_ERROR,
"Extended MVs unavailable in Simple Profile\n");
return -1;
}
v->dquant = get_bits(gb, 2); //common
v->vstransform = get_bits(gb, 1); //common
if (v->profile < PROFILE_ADVANCED)
{
v->res_transtab = get_bits(gb, 1);
if (v->res_transtab)
{
av_log(avctx, AV_LOG_ERROR,
"1 for reserved RES_TRANSTAB is forbidden\n");
return -1;
}
}
v->overlap = get_bits(gb, 1); //common
if (v->profile < PROFILE_ADVANCED)
{
v->s.resync_marker = get_bits(gb, 1);
v->rangered = get_bits(gb, 1);
if (v->rangered && v->profile == PROFILE_SIMPLE)
{
av_log(avctx, AV_LOG_INFO,
"RANGERED should be set to 0 in simple profile\n");
}
}
v->s.max_b_frames = avctx->max_b_frames = get_bits(gb, 3); //common
v->quantizer_mode = get_bits(gb, 2); //common
if (v->profile < PROFILE_ADVANCED)
{
v->finterpflag = get_bits(gb, 1); //common
v->res_rtm_flag = get_bits(gb, 1); //reserved
if (!v->res_rtm_flag)
{
av_log(avctx, AV_LOG_ERROR,
"0 for reserved RES_RTM_FLAG is forbidden\n");
//return -1;
}
av_log(avctx, AV_LOG_DEBUG,
"Profile %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"
"LoopFilter=%i, MultiRes=%i, FastUVMV=%i, Extended MV=%i\n"
"Rangered=%i, VSTransform=%i, Overlap=%i, SyncMarker=%i\n"
"DQuant=%i, Quantizer mode=%i, Max B frames=%i\n",
v->profile, v->frmrtq_postproc, v->bitrtq_postproc,
v->s.loop_filter, v->multires, v->fastuvmc, v->extended_mv,
v->rangered, v->vstransform, v->overlap, v->s.resync_marker,
v->dquant, v->quantizer_mode, avctx->max_b_frames
);
return 0;
}
return -1;
}
static int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
{
int pqindex, lowquant, status;
if(v->finterpflag) v->interpfrm = get_bits(gb, 1);
skip_bits(gb, 2); //framecnt unused
v->rangeredfrm = 0;
if (v->rangered) v->rangeredfrm = get_bits(gb, 1);
v->s.pict_type = get_bits(gb, 1);
if (v->s.avctx->max_b_frames) {
if (!v->s.pict_type) {
if (get_bits(gb, 1)) v->s.pict_type = I_TYPE;
else v->s.pict_type = B_TYPE;
} else v->s.pict_type = P_TYPE;
} else v->s.pict_type = v->s.pict_type ? P_TYPE : I_TYPE;
if(v->s.pict_type == I_TYPE)
get_bits(gb, 7); // skip buffer fullness
/* Quantizer stuff */
pqindex = get_bits(gb, 5);
if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
v->pq = pquant_table[0][pqindex];
else
v->pq = pquant_table[v->quantizer_mode-1][pqindex];
if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
v->pquantizer = pqindex < 9;
if (v->quantizer_mode == QUANT_UNIFORM || v->quantizer_mode == QUANT_NON_UNIFORM)
v->pquantizer = v->quantizer_mode == QUANT_UNIFORM;
v->pqindex = pqindex;
if (pqindex < 9) v->halfpq = get_bits(gb, 1);
else v->halfpq = 0;
if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)
v->pquantizer = get_bits(gb, 1);
v->dquantfrm = 0;
//av_log(v->s.avctx, AV_LOG_INFO, "%c Frame: QP=[%i]%i (+%i/2) %i\n",
// (v->s.pict_type == P_TYPE) ? 'P' : ((v->s.pict_type == I_TYPE) ? 'I' : 'B'), pqindex, v->pq, v->halfpq, v->rangeredfrm);
//TODO: complete parsing for P/B/BI frames
switch(v->s.pict_type) {
case P_TYPE:
if (v->pq < 5) v->tt_index = 0;
else if(v->pq < 13) v->tt_index = 1;
else v->tt_index = 2;
if (v->extended_mv == 1) v->mvrange = get_prefix(gb, 0, 3);
v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
v->range_x = 1 << (v->k_x - 1);
v->range_y = 1 << (v->k_y - 1);
if (v->profile == PROFILE_ADVANCED)
{
if (v->postprocflag) v->postproc = get_bits(gb, 1);
}
else
if (v->multires) v->respic = get_bits(gb, 2);
lowquant = (v->pq > 12) ? 0 : 1;
v->mv_mode = mv_pmode_table[lowquant][get_prefix(gb, 1, 4)];
if (v->mv_mode == MV_PMODE_INTENSITY_COMP)
{
v->mv_mode2 = mv_pmode_table[lowquant][get_prefix(gb, 1, 3)];
v->lumscale = get_bits(gb, 6);
v->lumshift = get_bits(gb, 6);
}
if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
v->s.quarter_sample = 0;
else
v->s.quarter_sample = 1;
if(v->mv_mode != MV_PMODE_1MV && v->mv_mode != MV_PMODE_1MV_HPEL && v->mv_mode != MV_PMODE_1MV_HPEL_BILIN) {
av_log(v->s.avctx, AV_LOG_ERROR, "Only 1MV P-frames are supported by now\n");
return -1;
}
if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&
v->mv_mode2 == MV_PMODE_MIXED_MV)
|| v->mv_mode == MV_PMODE_MIXED_MV)
{
status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);
if (status < 0) return -1;
av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "
"Imode: %i, Invert: %i\n", status>>1, status&1);
} else {
v->mv_type_is_raw = 0;
memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);
}
status = bitplane_decoding(v->skip_mb_plane, &v->skip_is_raw, v);
if (status < 0) return -1;
av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
"Imode: %i, Invert: %i\n", status>>1, status&1);
/* Hopefully this is correct for P frames */
v->s.mv_table_index = get_bits(gb, 2); //but using vc1_ tables
v->cbpcy_vlc = &vc1_cbpcy_p_vlc[get_bits(gb, 2)];
if (v->dquant)
{
av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
vop_dquant_decoding(v);
}
v->ttfrm = 0; //FIXME Is that so ?
if (v->vstransform)
{
v->ttmbf = get_bits(gb, 1);
if (v->ttmbf)
{
v->ttfrm = get_bits(gb, 2);
}
}
break;
case B_TYPE:
break;
}
/* AC Syntax */
v->c_ac_table_index = decode012(gb);
if (v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)
{
v->y_ac_table_index = decode012(gb);
}
/* DC Syntax */
v->s.dc_table_index = get_bits(gb, 1);
return 0;
}
/***********************************************************************/
/**
* @defgroup block VC-1 Block-level functions
* @see 7.1.4, p91 and 8.1.1.7, p(1)04
* @todo TODO: Integrate to MpegEncContext facilities
* @{
*/
/**
* @def GET_MQUANT
* @brief Get macroblock-level quantizer scale
* @warning XXX: qdiff to the frame quant, not previous quant ?
* @fixme XXX: Don't know how to initialize mquant otherwise in last case
*/
#define GET_MQUANT() \
if (v->dquantfrm) \
{ \
if (v->dqprofile == DQPROFILE_ALL_MBS) \
{ \
if (v->dqbilevel) \
{ \
mquant = (get_bits(gb, 1)) ? v->pq : v->altpq; \
} \
else \
{ \
mqdiff = get_bits(gb, 3); \
if (mqdiff != 7) mquant = v->pq + mqdiff; \
else mquant = get_bits(gb, 5); \
} \
} \
else mquant = v->pq; \
}
/**
* @def GET_MVDATA(_dmv_x, _dmv_y)
* @brief Get MV differentials
* @see MVDATA decoding from 8.3.5.2, p(1)20
* @param _dmv_x Horizontal differential for decoded MV
* @param _dmv_y Vertical differential for decoded MV
* @todo TODO: Use MpegEncContext arrays to store them
*/
#define GET_MVDATA(_dmv_x, _dmv_y) \
index = 1 + get_vlc2(gb, vc1_mv_diff_vlc[s->mv_table_index].table,\
VC1_MV_DIFF_VLC_BITS, 2); \
if (index > 36) \
{ \
mb_has_coeffs = 1; \
index -= 37; \
} \
else mb_has_coeffs = 0; \
s->mb_intra = 0; \
if (!index) { _dmv_x = _dmv_y = 0; } \
else if (index == 35) \
{ \
_dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample); \
_dmv_y = get_bits(gb, v->k_y - 1 + s->quarter_sample); \
} \
else if (index == 36) \
{ \
_dmv_x = 0; \
_dmv_y = 0; \
s->mb_intra = 1; \
} \
else \
{ \
index1 = index%6; \
if (!s->quarter_sample && index1 == 5) val = 1; \
else val = 0; \
if(size_table[index1] - val > 0) \
val = get_bits(gb, size_table[index1] - val); \
else val = 0; \
sign = 0 - (val&1); \
_dmv_x = (sign ^ ((val>>1) + offset_table[index1])) - sign; \
\
index1 = index/6; \
if (!s->quarter_sample && index1 == 5) val = 1; \
else val = 0; \
if(size_table[index1] - val > 0) \
val = get_bits(gb, size_table[index1] - val); \
else val = 0; \
sign = 0 - (val&1); \
_dmv_y = (sign ^ ((val>>1) + offset_table[index1])) - sign; \
}
/** Predict and set motion vector
*/
static inline void vc1_pred_mv(MpegEncContext *s, int dmv_x, int dmv_y, int mv1, int r_x, int r_y)
{
int xy, wrap, off;
int16_t *A, *B, *C;
int px, py;
int sum;
int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
/* scale MV difference to be quad-pel */
dmv_x <<= 1 - s->quarter_sample;
dmv_y <<= 1 - s->quarter_sample;
wrap = s->b8_stride;
xy = s->block_index[0];
C = s->current_picture.motion_val[0][xy - (1 << mv1)];
A = s->current_picture.motion_val[0][xy - (wrap << mv1)];
off = (s->mb_x == (s->mb_width - 1)) ? -1 : 1;
B = s->current_picture.motion_val[0][xy + ((off - wrap) << mv1)];
if(!s->first_slice_line) { // predictor A is not out of bounds
if(s->mb_width == 1) {
px = A[0];
py = A[1];
} else {
px = mid_pred(A[0], B[0], C[0]);
py = mid_pred(A[1], B[1], C[1]);
}
} else if(s->mb_x) { // predictor C is not out of bounds
px = C[0];
py = C[1];
} else {
px = py = 0;
}
if(s->mb_intra) px = py = 0;
/* Pullback MV as specified in 8.3.5.3.4 */
{
int qx, qy, X, Y;
qx = s->mb_x << 6; //FIXME: add real block coords for 4MV mode
qy = s->mb_y << 6;
X = (s->mb_width << 6) - 4;
Y = (s->mb_height << 6) - 4;
if(mv1) {
if(qx + px < -60) px = -60 - qx;
if(qy + py < -60) py = -60 - qy;
} else {
if(qx + px < -28) px = -28 - qx;
if(qy + py < -28) py = -28 - qy;
}
if(qx + px > X) px = X - qx;
if(qy + py > Y) py = Y - qy;
}
/* Calculate hybrid prediction as specified in 8.3.5.3.5 */
if(!s->mb_intra && !s->first_slice_line && s->mb_x) {
if(IS_INTRA(s->current_picture.mb_type[mb_pos - s->mb_stride]))
sum = ABS(px) + ABS(py);
else
sum = ABS(px - A[0]) + ABS(py - A[1]);
if(sum > 32) {
if(get_bits1(&s->gb)) {
px = A[0];
py = A[1];
} else {
px = C[0];
py = C[1];
}
} else {
if(IS_INTRA(s->current_picture.mb_type[mb_pos - 1]))
sum = ABS(px) + ABS(py);
else
sum = ABS(px - C[0]) + ABS(py - C[1]);
if(sum > 32) {
if(get_bits1(&s->gb)) {
px = A[0];
py = A[1];
} else {
px = C[0];
py = C[1];
}
}
}
}
/* store MV using signed modulus of MV range defined in 4.11 */
s->mv[0][0][0] = s->current_picture.motion_val[0][xy][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x;
s->mv[0][0][1] = s->current_picture.motion_val[0][xy][1] = ((py + dmv_y + r_y) & ((r_y << 1) - 1)) - r_y;
}
/** Get predicted DC value for I-frames only
* prediction dir: left=0, top=1
* @param s MpegEncContext
* @param[in] n block index in the current MB
* @param dc_val_ptr Pointer to DC predictor
* @param dir_ptr Prediction direction for use in AC prediction
*/
static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
int16_t **dc_val_ptr, int *dir_ptr)
{
int a, b, c, wrap, pred, scale;
int16_t *dc_val;
static const uint16_t dcpred[32] = {
-1, 1024, 512, 341, 256, 205, 171, 146, 128,
114, 102, 93, 85, 79, 73, 68, 64,
60, 57, 54, 51, 49, 47, 45, 43,
41, 39, 38, 37, 35, 34, 33
};
/* find prediction - wmv3_dc_scale always used here in fact */
if (n < 4) scale = s->y_dc_scale;
else scale = s->c_dc_scale;
wrap = s->block_wrap[n];
dc_val= s->dc_val[0] + s->block_index[n];
/* B A
* C X
*/
c = dc_val[ - 1];
b = dc_val[ - 1 - wrap];
a = dc_val[ - wrap];
if (pq < 9 || !overlap)
{
/* Set outer values */
if (!s->mb_y && (n!=2 && n!=3)) b=a=dcpred[scale];
if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=dcpred[scale];
}
else
{
/* Set outer values */
if (!s->mb_y && (n!=2 && n!=3)) b=a=0;
if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=0;
}
if (abs(a - b) <= abs(b - c)) {
pred = c;
*dir_ptr = 1;//left
} else {
pred = a;
*dir_ptr = 0;//top
}
/* update predictor */
*dc_val_ptr = &dc_val[0];
return pred;
}
/** Get predicted DC value
* prediction dir: left=0, top=1
* @param s MpegEncContext
* @param[in] n block index in the current MB
* @param dc_val_ptr Pointer to DC predictor
* @param dir_ptr Prediction direction for use in AC prediction
*/
static inline int vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,
int a_avail, int c_avail,
int16_t **dc_val_ptr, int *dir_ptr)
{
int a, b, c, wrap, pred, scale;
int16_t *dc_val;
int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
int mb_pos2, q1, q2;
/* find prediction - wmv3_dc_scale always used here in fact */
if (n < 4) scale = s->y_dc_scale;
else scale = s->c_dc_scale;
wrap = s->block_wrap[n];
dc_val= s->dc_val[0] + s->block_index[n];
/* B A
* C X
*/
c = dc_val[ - 1];
b = dc_val[ - 1 - wrap];
a = dc_val[ - wrap];
if(a_avail && c_avail) {
if(abs(a - b) <= abs(b - c)) {
pred = c;
*dir_ptr = 1;//left
} else {
pred = a;
*dir_ptr = 0;//top
}
} else if(a_avail) {
pred = a;
*dir_ptr = 0;//top
} else if(c_avail) {
pred = c;
*dir_ptr = 1;//left
} else {
pred = 0;
*dir_ptr = 1;//left
}
/* scale coeffs if needed */
mb_pos2 = mb_pos - *dir_ptr - (1 - *dir_ptr) * s->mb_stride;
q1 = s->current_picture.qscale_table[mb_pos];
q2 = s->current_picture.qscale_table[mb_pos2];
if(0 && q1 && q2 && q1 != q2) {
q1 = s->y_dc_scale_table[q1];
q2 = s->y_dc_scale_table[q2];
pred = (pred * q2 * vc1_dqscale[q1 - 1] + 0x20000) >> 18;
}
/* update predictor */
*dc_val_ptr = &dc_val[0];
return pred;
}
/**
* @defgroup std_mb VC1 Macroblock-level functions in Simple/Main Profiles
* @see 7.1.4, p91 and 8.1.1.7, p(1)04
* @todo TODO: Integrate to MpegEncContext facilities
* @{
*/
static inline int vc1_coded_block_pred(MpegEncContext * s, int n, uint8_t **coded_block_ptr)
{
int xy, wrap, pred, a, b, c;
xy = s->block_index[n];
wrap = s->b8_stride;
/* B C
* A X
*/
a = s->coded_block[xy - 1 ];
b = s->coded_block[xy - 1 - wrap];
c = s->coded_block[xy - wrap];
if (b == c) {
pred = a;
} else {
pred = c;
}
/* store value */
*coded_block_ptr = &s->coded_block[xy];
return pred;
}
/**
* Decode one AC coefficient
* @param v The VC1 context
* @param last Last coefficient
* @param skip How much zero coefficients to skip
* @param value Decoded AC coefficient value
* @see 8.1.3.4
*/
static void vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip, int *value, int codingset)
{
GetBitContext *gb = &v->s.gb;
int index, escape, run = 0, level = 0, lst = 0;
index = get_vlc2(gb, vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
if (index != vc1_ac_sizes[codingset] - 1) {
run = vc1_index_decode_table[codingset][index][0];
level = vc1_index_decode_table[codingset][index][1];
lst = index >= vc1_last_decode_table[codingset];
if(get_bits(gb, 1))
level = -level;
} else {
escape = decode210(gb);
if (escape != 2) {
index = get_vlc2(gb, vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);
run = vc1_index_decode_table[codingset][index][0];
level = vc1_index_decode_table[codingset][index][1];
lst = index >= vc1_last_decode_table[codingset];
if(escape == 0) {
if(lst)
level += vc1_last_delta_level_table[codingset][run];
else
level += vc1_delta_level_table[codingset][run];
} else {
if(lst)
run += vc1_last_delta_run_table[codingset][level] + 1;
else
run += vc1_delta_run_table[codingset][level] + 1;
}
if(get_bits(gb, 1))
level = -level;
} else {
int sign;
lst = get_bits(gb, 1);
if(v->s.esc3_level_length == 0) {
if(v->pq < 8 || v->dquantfrm) { // table 59
v->s.esc3_level_length = get_bits(gb, 3);
if(!v->s.esc3_level_length)
v->s.esc3_level_length = get_bits(gb, 2) + 8;
} else { //table 60
v->s.esc3_level_length = get_prefix(gb, 1, 6) + 2;
}
v->s.esc3_run_length = 3 + get_bits(gb, 2);
}
run = get_bits(gb, v->s.esc3_run_length);
sign = get_bits(gb, 1);
level = get_bits(gb, v->s.esc3_level_length);
if(sign)
level = -level;
}
}
*last = lst;
*skip = run;
*value = level;
}
/** Decode intra block in intra frames - should be faster than decode_intra_block
* @param v VC1Context
* @param block block to decode
* @param coded are AC coeffs present or not
* @param codingset set of VLC to decode data
*/
static int vc1_decode_i_block(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset)
{
GetBitContext *gb = &v->s.gb;
MpegEncContext *s = &v->s;
int dc_pred_dir = 0; /* Direction of the DC prediction used */
int run_diff, i;
int16_t *dc_val;
int16_t *ac_val, *ac_val2;
int dcdiff;
/* Get DC differential */
if (n < 4) {
dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
} else {
dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
}
if (dcdiff < 0){
av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
return -1;
}
if (dcdiff)
{
if (dcdiff == 119 /* ESC index value */)
{
/* TODO: Optimize */
if (v->pq == 1) dcdiff = get_bits(gb, 10);
else if (v->pq == 2) dcdiff = get_bits(gb, 9);
else dcdiff = get_bits(gb, 8);
}
else
{
if (v->pq == 1)
dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;
else if (v->pq == 2)
dcdiff = (dcdiff<<1) + get_bits(gb, 1) - 1;
}
if (get_bits(gb, 1))
dcdiff = -dcdiff;
}
/* Prediction */
dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);
*dc_val = dcdiff;
/* Store the quantized DC coeff, used for prediction */
if (n < 4) {
block[0] = dcdiff * s->y_dc_scale;
} else {
block[0] = dcdiff * s->c_dc_scale;
}
/* Skip ? */
run_diff = 0;
i = 0;
if (!coded) {
goto not_coded;
}
//AC Decoding
i = 1;
{
int last = 0, skip, value;
const int8_t *zz_table;
int scale;
int k;
scale = v->pq * 2 + v->halfpq;
if(v->s.ac_pred) {
if(!dc_pred_dir)
zz_table = vc1_horizontal_zz;
else
zz_table = vc1_vertical_zz;
} else
zz_table = vc1_normal_zz;
ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
ac_val2 = ac_val;
if(dc_pred_dir) //left
ac_val -= 16;
else //top
ac_val -= 16 * s->block_wrap[n];
while (!last) {
vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
i += skip;
if(i > 63)
break;
block[zz_table[i++]] = value;
}
/* apply AC prediction if needed */
if(s->ac_pred) {
if(dc_pred_dir) { //left
for(k = 1; k < 8; k++)
block[k << 3] += ac_val[k];
} else { //top
for(k = 1; k < 8; k++)
block[k] += ac_val[k + 8];
}
}
/* save AC coeffs for further prediction */
for(k = 1; k < 8; k++) {
ac_val2[k] = block[k << 3];
ac_val2[k + 8] = block[k];
}
/* scale AC coeffs */
for(k = 1; k < 64; k++)
if(block[k]) {
block[k] *= scale;
if(!v->pquantizer)
block[k] += (block[k] < 0) ? -v->pq : v->pq;
}
if(s->ac_pred) i = 63;
}
not_coded:
if(!coded) {
int k, scale;
ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
ac_val2 = ac_val;
scale = v->pq * 2 + v->halfpq;
memset(ac_val2, 0, 16 * 2);
if(dc_pred_dir) {//left
ac_val -= 16;
if(s->ac_pred)
memcpy(ac_val2, ac_val, 8 * 2);
} else {//top
ac_val -= 16 * s->block_wrap[n];
if(s->ac_pred)
memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
}
/* apply AC prediction if needed */
if(s->ac_pred) {
if(dc_pred_dir) { //left
for(k = 1; k < 8; k++) {
block[k << 3] = ac_val[k] * scale;
if(!v->pquantizer)
block[k << 3] += (block[k << 3] < 0) ? -v->pq : v->pq;
}
} else { //top
for(k = 1; k < 8; k++) {
block[k] = ac_val[k + 8] * scale;
if(!v->pquantizer)
block[k] += (block[k] < 0) ? -v->pq : v->pq;
}
}
i = 63;
}
}
s->block_last_index[n] = i;
return 0;
}
/** Decode intra block in inter frames - more generic version than vc1_decode_i_block
* @param v VC1Context
* @param block block to decode
* @param coded are AC coeffs present or not
* @param mquant block quantizer
* @param codingset set of VLC to decode data
*/
static int vc1_decode_intra_block(VC1Context *v, DCTELEM block[64], int n, int coded, int mquant, int codingset)
{
GetBitContext *gb = &v->s.gb;
MpegEncContext *s = &v->s;
int dc_pred_dir = 0; /* Direction of the DC prediction used */
int run_diff, i;
int16_t *dc_val;
int16_t *ac_val, *ac_val2;
int dcdiff;
int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
int a_avail = v->a_avail, c_avail = v->c_avail;
/* XXX: Guard against dumb values of mquant */
mquant = (mquant < 1) ? 0 : ( (mquant>31) ? 31 : mquant );
/* Set DC scale - y and c use the same */
s->y_dc_scale = s->y_dc_scale_table[mquant];
s->c_dc_scale = s->c_dc_scale_table[mquant];
/* Get DC differential */
if (n < 4) {
dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
} else {
dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);
}
if (dcdiff < 0){
av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");
return -1;
}
if (dcdiff)
{
if (dcdiff == 119 /* ESC index value */)
{
/* TODO: Optimize */
if (mquant == 1) dcdiff = get_bits(gb, 10);
else if (mquant == 2) dcdiff = get_bits(gb, 9);
else dcdiff = get_bits(gb, 8);
}
else
{
if (mquant == 1)
dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;
else if (mquant == 2)
dcdiff = (dcdiff<<1) + get_bits(gb, 1) - 1;
}
if (get_bits(gb, 1))
dcdiff = -dcdiff;
}
/* Prediction */
dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);
*dc_val = dcdiff;
/* Store the quantized DC coeff, used for prediction */
if (n < 4) {
block[0] = dcdiff * s->y_dc_scale;
} else {
block[0] = dcdiff * s->c_dc_scale;
}
/* Skip ? */
run_diff = 0;
i = 0;
if (!coded) {
goto not_coded;
}
//AC Decoding
i = 1;
{
int last = 0, skip, value;
const int8_t *zz_table;
int scale;
int k;
scale = mquant * 2;
zz_table = vc1_simple_progressive_8x8_zz;
ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
ac_val2 = ac_val;
if(dc_pred_dir) //left
ac_val -= 16;
else //top
ac_val -= 16 * s->block_wrap[n];
while (!last) {
vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);
i += skip;
if(i > 63)
break;
block[zz_table[i++]] = value;
}
/* apply AC prediction if needed */
if(s->ac_pred && (v->a_avail || v->c_avail)) {
/* scale predictors if needed*/
int mb_pos2, q1, q2;
mb_pos2 = mb_pos - dc_pred_dir - (1 - dc_pred_dir) * s->mb_stride;
q1 = s->current_picture.qscale_table[mb_pos];
q2 = s->current_picture.qscale_table[mb_pos2];
if(!c_avail) {
memset(ac_val, 0, 8 * sizeof(ac_val[0]));
dc_pred_dir = 0;
}
if(!a_avail) {
memset(ac_val + 8, 0, 8 * sizeof(ac_val[0]));
dc_pred_dir = 1;
}
if(q2 && q1 != q2) {
q1 = q1 * 2 - 1;
q2 = q2 * 2 - 1;
if(dc_pred_dir) { //left
for(k = 1; k < 8; k++)
block[k << 3] += (ac_val[k] * q2 * vc1_dqscale[q1 - 1] + 0x20000) >> 18;
} else { //top
for(k = 1; k < 8; k++)
block[k] += (ac_val[k + 8] * q2 * vc1_dqscale[q1 - 1] + 0x20000) >> 18;
}
} else {
if(dc_pred_dir) { //left
for(k = 1; k < 8; k++)
block[k << 3] += ac_val[k];
} else { //top
for(k = 1; k < 8; k++)
block[k] += ac_val[k + 8];
}
}
}
/* save AC coeffs for further prediction */
for(k = 1; k < 8; k++) {
ac_val2[k] = block[k << 3];
ac_val2[k + 8] = block[k];
}
/* scale AC coeffs */
for(k = 1; k < 64; k++)
if(block[k]) {
block[k] *= scale;
if(!v->pquantizer)
block[k] += (block[k] < 0) ? -mquant : mquant;
}
if(s->ac_pred) i = 63;
}
not_coded:
if(!coded) {
int k, scale;
ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
ac_val2 = ac_val;
if(!c_avail) {
memset(ac_val, 0, 8 * sizeof(ac_val[0]));
dc_pred_dir = 0;
}
if(!a_avail) {
memset(ac_val + 8, 0, 8 * sizeof(ac_val[0]));
dc_pred_dir = 1;
}
scale = mquant * 2;
memset(ac_val2, 0, 16 * 2);
if(dc_pred_dir) {//left
ac_val -= 16;
if(s->ac_pred && (v->a_avail || v->c_avail))
memcpy(ac_val2, ac_val, 8 * 2);
} else {//top
ac_val -= 16 * s->block_wrap[n];
if(s->ac_pred && (v->a_avail || v->c_avail))
memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);
}
/* apply AC prediction if needed */
if(s->ac_pred && (v->a_avail || v->c_avail)) {
if(dc_pred_dir) { //left
for(k = 1; k < 8; k++) {
block[k << 3] = ac_val[k] * scale;
if(!v->pquantizer)
block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;
}
} else { //top
for(k = 1; k < 8; k++) {
block[k] = ac_val[k + 8] * scale;
if(!v->pquantizer)
block[k] += (block[k] < 0) ? -mquant : mquant;
}
}
i = 63;
}
}
s->block_last_index[n] = i;
return 0;
}
/** Decode P block
*/
static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquant, int ttmb, int first_block)
{
MpegEncContext *s = &v->s;
GetBitContext *gb = &s->gb;
int i, j;
int subblkpat = 0;
int scale, off, idx, last, skip, value;
int ttblk = ttmb & 7;
if(ttmb == -1) {
ttblk = ttblk_to_tt[v->tt_index][get_vlc2(gb, vc1_ttblk_vlc[v->tt_index].table, VC1_TTBLK_VLC_BITS, 1)];
}
if(ttblk == TT_4X4) {
subblkpat = ~(get_vlc2(gb, vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);
}
if((ttblk != TT_8X8 && ttblk != TT_4X4) && (v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))) {
subblkpat = decode012(gb);
if(subblkpat) subblkpat ^= 3; //swap decoded pattern bits
if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) ttblk = TT_8X4;
if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) ttblk = TT_4X8;
}
scale = 2 * mquant;
// convert transforms like 8X4_TOP to generic TT and SUBBLKPAT
if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {
ttblk = TT_8X4;
subblkpat = 2 - (ttblk == TT_8X4_TOP);
}
if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {
ttblk = TT_4X8;
subblkpat = 2 - (ttblk == TT_4X8_LEFT);
}
switch(ttblk) {
case TT_8X8:
i = 0;
last = 0;
while (!last) {
vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
i += skip;
if(i > 63)
break;
idx = vc1_simple_progressive_8x8_zz[i++];
block[idx] = value * scale;
}
vc1_inv_trans(block, 8, 8);
break;
case TT_4X4:
for(j = 0; j < 4; j++) {
last = subblkpat & (1 << (3 - j));
i = 0;
off = (j & 1) * 4 + (j & 2) * 16;
while (!last) {
vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
i += skip;
if(i > 15)
break;
idx = vc1_simple_progressive_4x4_zz[i++];
block[idx + off] = value * scale;
}
if(!(subblkpat & (1 << (3 - j))))
vc1_inv_trans(block + off, 4, 4);
}
break;
case TT_8X4:
for(j = 0; j < 2; j++) {
last = subblkpat & (1 << (1 - j));
i = 0;
off = j * 32;
while (!last) {
vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
i += skip;
if(i > 31)
break;
idx = vc1_simple_progressive_8x4_zz[i++];
block[idx + off] = value * scale;
}
if(!(subblkpat & (1 << (1 - j))))
vc1_inv_trans(block + off, 8, 4);
}
break;
case TT_4X8:
for(j = 0; j < 2; j++) {
last = subblkpat & (1 << (1 - j));
i = 0;
off = j * 4;
while (!last) {
vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);
i += skip;
if(i > 31)
break;
idx = vc1_simple_progressive_8x4_zz[i++];
block[idx + off] = value * scale;
}
if(!(subblkpat & (1 << (1 - j))))
vc1_inv_trans(block + off, 4, 8);
}
break;
}
return 0;
}
/** Decode one P-frame MB (in Simple/Main profile)
* @todo TODO: Extend to AP
* @fixme FIXME: DC value for inter blocks not set
*/
static int vc1_decode_p_mb(VC1Context *v, DCTELEM block[6][64])
{
MpegEncContext *s = &v->s;
GetBitContext *gb = &s->gb;
int i, j;
int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
int cbp; /* cbp decoding stuff */
int hybrid_pred; /* Prediction types */
int mqdiff, mquant; /* MB quantization */
int ttmb = v->ttmb; /* MB Transform type */
int status;
static const int size_table[6] = { 0, 2, 3, 4, 5, 8 },
offset_table[6] = { 0, 1, 3, 7, 15, 31 };
int mb_has_coeffs = 1; /* last_flag */
int dmv_x, dmv_y; /* Differential MV components */
int index, index1; /* LUT indices */
int val, sign; /* temp values */
int first_block = 1;
int dst_idx, off;
int skipped, fourmv;
mquant = v->pq; /* Loosy initialization */
if (v->mv_type_is_raw)
fourmv = get_bits1(gb);
else
fourmv = v->mv_type_mb_plane[mb_pos];
if (v->skip_is_raw)
skipped = get_bits1(gb);
else
skipped = v->skip_mb_plane[mb_pos];
if (!fourmv) /* 1MV mode */
{
if (!skipped)
{
GET_MVDATA(dmv_x, dmv_y);
s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;
vc1_pred_mv(s, dmv_x, dmv_y, 1, v->range_x, v->range_y);
/* FIXME Set DC val for inter block ? */
if (s->mb_intra && !mb_has_coeffs)
{
GET_MQUANT();
s->ac_pred = get_bits(gb, 1);
cbp = 0;
}
else if (mb_has_coeffs)
{
if (s->mb_intra) s->ac_pred = get_bits(gb, 1);
cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
GET_MQUANT();
}
else
{
mquant = v->pq;
cbp = 0;
}
s->current_picture.qscale_table[mb_pos] = mquant;
if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)
ttmb = get_vlc2(gb, vc1_ttmb_vlc[v->tt_index].table,
VC1_TTMB_VLC_BITS, 2);
s->dsp.clear_blocks(block[0]);
vc1_mc_1mv(v);
dst_idx = 0;
for (i=0; i<6; i++)
{
s->dc_val[0][s->block_index[i]] = 0;
dst_idx += i >> 2;
val = ((cbp >> (5 - i)) & 1);
off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);
if(s->mb_intra) {
/* check if prediction blocks A and C are available */
v->a_avail = v->c_avail = 0;
if((i == 2 || i == 3) || (s->mb_y && IS_INTRA(s->current_picture.mb_type[mb_pos - s->mb_stride])))
v->a_avail = 1;
if((i == 1 || i == 3) || (s->mb_x && IS_INTRA(s->current_picture.mb_type[mb_pos - 1])))
v->c_avail = 1;
vc1_decode_intra_block(v, block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);
vc1_inv_trans(block[i], 8, 8);
for(j = 0; j < 64; j++) block[i][j] += 128;
s->dsp.put_pixels_clamped(block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));
/* TODO: proper loop filtering */
if(v->pq >= 9 && v->overlap) {
if(v->a_avail)
s->dsp.h263_v_loop_filter(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2), s->y_dc_scale);
if(v->c_avail)
s->dsp.h263_h_loop_filter(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2), s->y_dc_scale);
}
} else if(val) {
vc1_decode_p_block(v, block[i], i, mquant, ttmb, first_block);
if(!v->ttmbf && ttmb < 8) ttmb = -1;
first_block = 0;
s->dsp.add_pixels_clamped(block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);
}
}
}
else //Skipped
{
s->mb_intra = 0;
s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;
vc1_pred_mv(s, 0, 0, 1, v->range_x, v->range_y);
vc1_mc_1mv(v);
return 0;
}
} //1MV mode
else //4MV mode
{//FIXME: looks not conforming to standard and is not even theoretically complete
if (!skipped /* unskipped MB */)
{
int blk_intra[4], blk_coded[4];
/* Get CBPCY */
cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);
for (i=0; i<4; i++)
{
val = ((cbp >> (5 - i)) & 1);
blk_intra[i] = 0;
blk_coded[i] = val;
if(val) {
GET_MVDATA(dmv_x, dmv_y);
blk_intra[i] = s->mb_intra;
}
if (v->mv_mode == MV_PMODE_MIXED_MV /* Hybrid pred */)
hybrid_pred = get_bits(gb, 1);
}
if((blk_intra[0] | blk_intra[1] | blk_intra[2] | blk_intra[3]) ||
(blk_coded[0] | blk_coded[1] | blk_coded[2] | blk_coded[3])) {
GET_MQUANT();
if (s->mb_intra /* One of the 4 blocks is intra */
/* non-zero pred for that block */)
s->ac_pred = get_bits(gb, 1);
if (!v->ttmbf)
ttmb = get_vlc2(gb, vc1_ttmb_vlc[v->tt_index].table,
VC1_TTMB_VLC_BITS, 12);
for(i = 0; i < 6; i++) {
val = ((cbp >> (5 - i)) & 1);
if(i & 4 || blk_intra[i] || val) {
if(i < 4 && blk_intra[i])
status = vc1_decode_intra_block(v, block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);
else
status = vc1_decode_p_block(v, block[i], i, mquant, ttmb, 0);
}
}
}
return status;
}
else //Skipped MB
{
/* XXX: Skipped => cbp=0 and mquant doesn't matter ? */
for (i=0; i<4; i++)
{
if (v->mv_mode == MV_PMODE_MIXED_MV /* Hybrid pred */)
hybrid_pred = get_bits(gb, 1);
}
/* TODO: blah */
return 0;
}
}
/* Should never happen */
return -1;
}
/** Decode blocks of I-frame
*/
static void vc1_decode_i_blocks(VC1Context *v)
{
int k;
MpegEncContext *s = &v->s;
int cbp, val;
uint8_t *coded_val;
int mb_pos;
/* select codingmode used for VLC tables selection */
switch(v->y_ac_table_index){
case 0:
v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
break;
case 1:
v->codingset = CS_HIGH_MOT_INTRA;
break;
case 2:
v->codingset = CS_MID_RATE_INTRA;
break;
}
switch(v->c_ac_table_index){
case 0:
v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
break;
case 1:
v->codingset2 = CS_HIGH_MOT_INTER;
break;
case 2:
v->codingset2 = CS_MID_RATE_INTER;
break;
}
/* Set DC scale - y and c use the same */
s->y_dc_scale = s->y_dc_scale_table[v->pq];
s->c_dc_scale = s->c_dc_scale_table[v->pq];
//do frame decode
s->mb_x = s->mb_y = 0;
s->mb_intra = 1;
ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {
ff_init_block_index(s);
ff_update_block_index(s);
s->dsp.clear_blocks(s->block[0]);
mb_pos = s->mb_x + s->mb_y * s->mb_width;
s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;
s->current_picture.qscale_table[mb_pos] = v->pq;
// do actual MB decoding and displaying
cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);
v->s.ac_pred = get_bits(&v->s.gb, 1);
for(k = 0; k < 6; k++) {
val = ((cbp >> (5 - k)) & 1);
if (k < 4) {
int pred = vc1_coded_block_pred(&v->s, k, &coded_val);
val = val ^ pred;
*coded_val = val;
}
cbp |= val << (5 - k);
vc1_decode_i_block(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2);
vc1_inv_trans(s->block[k], 8, 8);
if(v->pq >= 9 && v->overlap) {
vc1_overlap_block(s, s->block[k], k, (s->mb_y || k>1), (s->mb_x || (k != 0 && k != 2)));
}
}
vc1_put_block(v, s->block);
if(v->pq >= 9 && v->overlap) { /* XXX: do proper overlapping insted of loop filter */
if(s->mb_y) {
s->dsp.h263_v_loop_filter(s->dest[0], s->linesize, s->y_dc_scale);
s->dsp.h263_v_loop_filter(s->dest[0] + 8, s->linesize, s->y_dc_scale);
s->dsp.h263_v_loop_filter(s->dest[1], s->uvlinesize, s->y_dc_scale);
s->dsp.h263_v_loop_filter(s->dest[2], s->uvlinesize, s->y_dc_scale);
}
s->dsp.h263_v_loop_filter(s->dest[0] + 8 * s->linesize, s->linesize, s->y_dc_scale);
s->dsp.h263_v_loop_filter(s->dest[0] + 8 * s->linesize + 8, s->linesize, s->y_dc_scale);
if(s->mb_x) {
s->dsp.h263_h_loop_filter(s->dest[0], s->linesize, s->y_dc_scale);
s->dsp.h263_h_loop_filter(s->dest[0] + 8 * s->linesize, s->linesize, s->y_dc_scale);
s->dsp.h263_h_loop_filter(s->dest[1], s->uvlinesize, s->y_dc_scale);
s->dsp.h263_h_loop_filter(s->dest[2], s->uvlinesize, s->y_dc_scale);
}
s->dsp.h263_h_loop_filter(s->dest[0] + 8, s->linesize, s->y_dc_scale);
s->dsp.h263_h_loop_filter(s->dest[0] + 8 * s->linesize + 8, s->linesize, s->y_dc_scale);
}
if(get_bits_count(&s->gb) > v->bits) {
av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);
return;
}
}
ff_draw_horiz_band(s, s->mb_y * 16, 16);
}
}
static void vc1_decode_p_blocks(VC1Context *v)
{
MpegEncContext *s = &v->s;
/* select codingmode used for VLC tables selection */
switch(v->c_ac_table_index){
case 0:
v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;
break;
case 1:
v->codingset = CS_HIGH_MOT_INTRA;
break;
case 2:
v->codingset = CS_MID_RATE_INTRA;
break;
}
switch(v->c_ac_table_index){
case 0:
v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;
break;
case 1:
v->codingset2 = CS_HIGH_MOT_INTER;
break;
case 2:
v->codingset2 = CS_MID_RATE_INTER;
break;
}
ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));
s->first_slice_line = 1;
for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {
for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {
ff_init_block_index(s);
ff_update_block_index(s);
s->dsp.clear_blocks(s->block[0]);
vc1_decode_p_mb(v, s->block);
if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {
av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n", get_bits_count(&s->gb), v->bits,s->mb_x,s->mb_y);
return;
}
}
ff_draw_horiz_band(s, s->mb_y * 16, 16);
s->first_slice_line = 0;
}
}
static void vc1_decode_blocks(VC1Context *v)
{
v->s.esc3_level_length = 0;
switch(v->s.pict_type) {
case I_TYPE:
vc1_decode_i_blocks(v);
break;
case P_TYPE:
vc1_decode_p_blocks(v);
break;
}
}
/** Initialize a VC1/WMV3 decoder
* @todo TODO: Handle VC-1 IDUs (Transport level?)
* @todo TODO: Decypher remaining bits in extra_data
*/
static int vc1_decode_init(AVCodecContext *avctx)
{
VC1Context *v = avctx->priv_data;
MpegEncContext *s = &v->s;
GetBitContext gb;
if (!avctx->extradata_size || !avctx->extradata) return -1;
avctx->pix_fmt = PIX_FMT_YUV420P;
v->s.avctx = avctx;
avctx->flags |= CODEC_FLAG_EMU_EDGE;
v->s.flags |= CODEC_FLAG_EMU_EDGE;
if(ff_h263_decode_init(avctx) < 0)
return -1;
if (vc1_init_common(v) < 0) return -1;
av_log(avctx, AV_LOG_INFO, "This decoder is not supposed to produce picture. Dont report this as a bug!\n");
av_log(avctx, AV_LOG_INFO, "If you see a picture, don't believe your eyes.\n");
avctx->coded_width = avctx->width;
avctx->coded_height = avctx->height;
if (avctx->codec_id == CODEC_ID_WMV3)
{
int count = 0;
// looks like WMV3 has a sequence header stored in the extradata
// advanced sequence header may be before the first frame
// the last byte of the extradata is a version number, 1 for the
// samples we can decode
init_get_bits(&gb, avctx->extradata, avctx->extradata_size*8);
if (decode_sequence_header(avctx, &gb) < 0)
return -1;
count = avctx->extradata_size*8 - get_bits_count(&gb);
if (count>0)
{
av_log(avctx, AV_LOG_INFO, "Extra data: %i bits left, value: %X\n",
count, get_bits(&gb, count));
}
else if (count < 0)
{
av_log(avctx, AV_LOG_INFO, "Read %i bits in overflow\n", -count);
}
}
avctx->has_b_frames= !!(avctx->max_b_frames);
s->mb_width = (avctx->coded_width+15)>>4;
s->mb_height = (avctx->coded_height+15)>>4;
/* Allocate mb bitplanes */
v->mv_type_mb_plane = av_malloc(s->mb_stride * s->mb_height);
v->skip_mb_plane = av_malloc(s->mb_stride * s->mb_height);
/* For predictors */
v->previous_line_cbpcy = (uint8_t *)av_malloc(s->mb_stride*4);
if (!v->previous_line_cbpcy) return -1;
/* Init coded blocks info */
if (v->profile == PROFILE_ADVANCED)
{
// if (alloc_bitplane(&v->over_flags_plane, s->mb_width, s->mb_height) < 0)
// return -1;
// if (alloc_bitplane(&v->ac_pred_plane, s->mb_width, s->mb_height) < 0)
// return -1;
}
return 0;
}
/** Decode a VC1/WMV3 frame
* @todo TODO: Handle VC-1 IDUs (Transport level?)
* @warning Initial try at using MpegEncContext stuff
*/
static int vc1_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
uint8_t *buf, int buf_size)
{
VC1Context *v = avctx->priv_data;
MpegEncContext *s = &v->s;
AVFrame *pict = data;
/* no supplementary picture */
if (buf_size == 0) {
/* special case for last picture */
if (s->low_delay==0 && s->next_picture_ptr) {
*pict= *(AVFrame*)s->next_picture_ptr;
s->next_picture_ptr= NULL;
*data_size = sizeof(AVFrame);
}
return 0;
}
//we need to set current_picture_ptr before reading the header, otherwise we cant store anyting im there
if(s->current_picture_ptr==NULL || s->current_picture_ptr->data[0]){
int i= ff_find_unused_picture(s, 0);
s->current_picture_ptr= &s->picture[i];
}
avctx->has_b_frames= !s->low_delay;
init_get_bits(&s->gb, buf, buf_size*8);
// do parse frame header
if(vc1_parse_frame_header(v, &s->gb) == -1)
return -1;
if(s->pict_type != I_TYPE && s->pict_type != P_TYPE)return -1;
// for hurry_up==5
s->current_picture.pict_type= s->pict_type;
s->current_picture.key_frame= s->pict_type == I_TYPE;
/* skip B-frames if we don't have reference frames */
if(s->last_picture_ptr==NULL && (s->pict_type==B_TYPE || s->dropable)) return -1;//buf_size;
/* skip b frames if we are in a hurry */
if(avctx->hurry_up && s->pict_type==B_TYPE) return -1;//buf_size;
if( (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==B_TYPE)
|| (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=I_TYPE)
|| avctx->skip_frame >= AVDISCARD_ALL)
return buf_size;
/* skip everything if we are in a hurry>=5 */
if(avctx->hurry_up>=5) return -1;//buf_size;
if(s->next_p_frame_damaged){
if(s->pict_type==B_TYPE)
return buf_size;
else
s->next_p_frame_damaged=0;
}
if(MPV_frame_start(s, avctx) < 0)
return -1;
ff_er_frame_start(s);
v->bits = buf_size * 8;
vc1_decode_blocks(v);
//av_log(s->avctx, AV_LOG_INFO, "Consumed %i/%i bits\n", get_bits_count(&s->gb), buf_size*8);
// if(get_bits_count(&s->gb) > buf_size * 8)
// return -1;
ff_er_frame_end(s);
MPV_frame_end(s);
assert(s->current_picture.pict_type == s->current_picture_ptr->pict_type);
assert(s->current_picture.pict_type == s->pict_type);
if (s->pict_type == B_TYPE || s->low_delay) {
*pict= *(AVFrame*)s->current_picture_ptr;
} else if (s->last_picture_ptr != NULL) {
*pict= *(AVFrame*)s->last_picture_ptr;
}
if(s->last_picture_ptr || s->low_delay){
*data_size = sizeof(AVFrame);
ff_print_debug_info(s, pict);
}
/* Return the Picture timestamp as the frame number */
/* we substract 1 because it is added on utils.c */
avctx->frame_number = s->picture_number - 1;
return buf_size;
}
/** Close a VC1/WMV3 decoder
* @warning Initial try at using MpegEncContext stuff
*/
static int vc1_decode_end(AVCodecContext *avctx)
{
VC1Context *v = avctx->priv_data;
av_freep(&v->hrd_rate);
av_freep(&v->hrd_buffer);
MPV_common_end(&v->s);
av_freep(&v->mv_type_mb_plane);
av_freep(&v->skip_mb_plane);
return 0;
}
AVCodec vc1_decoder = {
"vc1",
CODEC_TYPE_VIDEO,
CODEC_ID_VC1,
sizeof(VC1Context),
vc1_decode_init,
NULL,
vc1_decode_end,
vc1_decode_frame,
CODEC_CAP_DELAY,
NULL
};
AVCodec wmv3_decoder = {
"wmv3",
CODEC_TYPE_VIDEO,
CODEC_ID_WMV3,
sizeof(VC1Context),
vc1_decode_init,
NULL,
vc1_decode_end,
vc1_decode_frame,
CODEC_CAP_DELAY,
NULL
};
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