2007-07-08 10:37:30 +03:00
|
|
|
/*
|
|
|
|
* Chinese AVS video (AVS1-P2, JiZhun profile) decoder.
|
|
|
|
* Copyright (c) 2006 Stefan Gehrer <stefan.gehrer@gmx.de>
|
|
|
|
*
|
|
|
|
* This file is part of FFmpeg.
|
|
|
|
*
|
|
|
|
* FFmpeg 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,
|
|
|
|
* 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
|
|
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
*/
|
|
|
|
|
|
|
|
/**
|
|
|
|
* @file cavs.c
|
|
|
|
* Chinese AVS video (AVS1-P2, JiZhun profile) decoder
|
|
|
|
* @author Stefan Gehrer <stefan.gehrer@gmx.de>
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include "avcodec.h"
|
|
|
|
#include "bitstream.h"
|
|
|
|
#include "golomb.h"
|
|
|
|
#include "cavs.h"
|
|
|
|
|
|
|
|
static const uint8_t mv_scan[4] = {
|
|
|
|
MV_FWD_X0,MV_FWD_X1,
|
|
|
|
MV_FWD_X2,MV_FWD_X3
|
|
|
|
};
|
|
|
|
|
|
|
|
static const uint8_t cbp_tab[64][2] = {
|
|
|
|
{63, 0},{15,15},{31,63},{47,31},{ 0,16},{14,32},{13,47},{11,13},
|
|
|
|
{ 7,14},{ 5,11},{10,12},{ 8, 5},{12,10},{61, 7},{ 4,48},{55, 3},
|
|
|
|
{ 1, 2},{ 2, 8},{59, 4},{ 3, 1},{62,61},{ 9,55},{ 6,59},{29,62},
|
|
|
|
{45,29},{51,27},{23,23},{39,19},{27,30},{46,28},{53, 9},{30, 6},
|
|
|
|
{43,60},{37,21},{60,44},{16,26},{21,51},{28,35},{19,18},{35,20},
|
|
|
|
{42,24},{26,53},{44,17},{32,37},{58,39},{24,45},{20,58},{17,43},
|
|
|
|
{18,42},{48,46},{22,36},{33,33},{25,34},{49,40},{40,52},{36,49},
|
|
|
|
{34,50},{50,56},{52,25},{54,22},{41,54},{56,57},{38,41},{57,38}
|
|
|
|
};
|
|
|
|
|
|
|
|
/*****************************************************************************
|
|
|
|
*
|
|
|
|
* motion vector prediction
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
static inline void store_mvs(AVSContext *h) {
|
|
|
|
h->col_mv[(h->mby*h->mb_width + h->mbx)*4 + 0] = h->mv[MV_FWD_X0];
|
|
|
|
h->col_mv[(h->mby*h->mb_width + h->mbx)*4 + 1] = h->mv[MV_FWD_X1];
|
|
|
|
h->col_mv[(h->mby*h->mb_width + h->mbx)*4 + 2] = h->mv[MV_FWD_X2];
|
|
|
|
h->col_mv[(h->mby*h->mb_width + h->mbx)*4 + 3] = h->mv[MV_FWD_X3];
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void mv_pred_direct(AVSContext *h, vector_t *pmv_fw,
|
|
|
|
vector_t *col_mv) {
|
|
|
|
vector_t *pmv_bw = pmv_fw + MV_BWD_OFFS;
|
|
|
|
int den = h->direct_den[col_mv->ref];
|
|
|
|
int m = col_mv->x >> 31;
|
|
|
|
|
|
|
|
pmv_fw->dist = h->dist[1];
|
|
|
|
pmv_bw->dist = h->dist[0];
|
|
|
|
pmv_fw->ref = 1;
|
|
|
|
pmv_bw->ref = 0;
|
|
|
|
/* scale the co-located motion vector according to its temporal span */
|
|
|
|
pmv_fw->x = (((den+(den*col_mv->x*pmv_fw->dist^m)-m-1)>>14)^m)-m;
|
|
|
|
pmv_bw->x = m-(((den+(den*col_mv->x*pmv_bw->dist^m)-m-1)>>14)^m);
|
|
|
|
m = col_mv->y >> 31;
|
|
|
|
pmv_fw->y = (((den+(den*col_mv->y*pmv_fw->dist^m)-m-1)>>14)^m)-m;
|
|
|
|
pmv_bw->y = m-(((den+(den*col_mv->y*pmv_bw->dist^m)-m-1)>>14)^m);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void mv_pred_sym(AVSContext *h, vector_t *src, enum block_t size) {
|
|
|
|
vector_t *dst = src + MV_BWD_OFFS;
|
|
|
|
|
|
|
|
/* backward mv is the scaled and negated forward mv */
|
|
|
|
dst->x = -((src->x * h->sym_factor + 256) >> 9);
|
|
|
|
dst->y = -((src->y * h->sym_factor + 256) >> 9);
|
|
|
|
dst->ref = 0;
|
|
|
|
dst->dist = h->dist[0];
|
|
|
|
set_mvs(dst, size);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*****************************************************************************
|
|
|
|
*
|
|
|
|
* residual data decoding
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
/** kth-order exponential golomb code */
|
|
|
|
static inline int get_ue_code(GetBitContext *gb, int order) {
|
|
|
|
if(order) {
|
|
|
|
int ret = get_ue_golomb(gb) << order;
|
|
|
|
return ret + get_bits(gb,order);
|
|
|
|
}
|
|
|
|
return get_ue_golomb(gb);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* decode coefficients from one 8x8 block, dequantize, inverse transform
|
|
|
|
* and add them to sample block
|
|
|
|
* @param r pointer to 2D VLC table
|
|
|
|
* @param esc_golomb_order escape codes are k-golomb with this order k
|
|
|
|
* @param qp quantizer
|
|
|
|
* @param dst location of sample block
|
|
|
|
* @param stride line stride in frame buffer
|
|
|
|
*/
|
|
|
|
static int decode_residual_block(AVSContext *h, GetBitContext *gb,
|
2008-12-15 12:08:31 +02:00
|
|
|
const struct dec_2dvlc *r, int esc_golomb_order,
|
2007-07-08 10:37:30 +03:00
|
|
|
int qp, uint8_t *dst, int stride) {
|
|
|
|
int i, level_code, esc_code, level, run, mask;
|
2008-05-28 01:10:17 +03:00
|
|
|
DCTELEM level_buf[65];
|
|
|
|
uint8_t run_buf[65];
|
2007-07-08 10:37:30 +03:00
|
|
|
DCTELEM *block = h->block;
|
|
|
|
|
|
|
|
for(i=0;i<65;i++) {
|
|
|
|
level_code = get_ue_code(gb,r->golomb_order);
|
|
|
|
if(level_code >= ESCAPE_CODE) {
|
|
|
|
run = ((level_code - ESCAPE_CODE) >> 1) + 1;
|
|
|
|
esc_code = get_ue_code(gb,esc_golomb_order);
|
|
|
|
level = esc_code + (run > r->max_run ? 1 : r->level_add[run]);
|
|
|
|
while(level > r->inc_limit)
|
|
|
|
r++;
|
|
|
|
mask = -(level_code & 1);
|
|
|
|
level = (level^mask) - mask;
|
|
|
|
} else {
|
|
|
|
level = r->rltab[level_code][0];
|
|
|
|
if(!level) //end of block signal
|
|
|
|
break;
|
|
|
|
run = r->rltab[level_code][1];
|
|
|
|
r += r->rltab[level_code][2];
|
|
|
|
}
|
|
|
|
level_buf[i] = level;
|
|
|
|
run_buf[i] = run;
|
|
|
|
}
|
|
|
|
if(dequant(h,level_buf, run_buf, block, ff_cavs_dequant_mul[qp],
|
|
|
|
ff_cavs_dequant_shift[qp], i))
|
|
|
|
return -1;
|
|
|
|
h->s.dsp.cavs_idct8_add(dst,block,stride);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static inline void decode_residual_chroma(AVSContext *h) {
|
|
|
|
if(h->cbp & (1<<4))
|
|
|
|
decode_residual_block(h,&h->s.gb,ff_cavs_chroma_dec,0,
|
|
|
|
ff_cavs_chroma_qp[h->qp],h->cu,h->c_stride);
|
|
|
|
if(h->cbp & (1<<5))
|
|
|
|
decode_residual_block(h,&h->s.gb,ff_cavs_chroma_dec,0,
|
|
|
|
ff_cavs_chroma_qp[h->qp],h->cv,h->c_stride);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline int decode_residual_inter(AVSContext *h) {
|
|
|
|
int block;
|
|
|
|
|
|
|
|
/* get coded block pattern */
|
|
|
|
int cbp= get_ue_golomb(&h->s.gb);
|
|
|
|
if(cbp > 63){
|
|
|
|
av_log(h->s.avctx, AV_LOG_ERROR, "illegal inter cbp\n");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
h->cbp = cbp_tab[cbp][1];
|
|
|
|
|
|
|
|
/* get quantizer */
|
|
|
|
if(h->cbp && !h->qp_fixed)
|
|
|
|
h->qp = (h->qp + get_se_golomb(&h->s.gb)) & 63;
|
|
|
|
for(block=0;block<4;block++)
|
|
|
|
if(h->cbp & (1<<block))
|
|
|
|
decode_residual_block(h,&h->s.gb,ff_cavs_inter_dec,0,h->qp,
|
|
|
|
h->cy + h->luma_scan[block], h->l_stride);
|
|
|
|
decode_residual_chroma(h);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*****************************************************************************
|
|
|
|
*
|
|
|
|
* macroblock level
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
static int decode_mb_i(AVSContext *h, int cbp_code) {
|
|
|
|
GetBitContext *gb = &h->s.gb;
|
|
|
|
int block, pred_mode_uv;
|
|
|
|
uint8_t top[18];
|
|
|
|
uint8_t *left = NULL;
|
|
|
|
uint8_t *d;
|
|
|
|
|
2007-07-25 08:09:54 +03:00
|
|
|
ff_cavs_init_mb(h);
|
2007-07-08 10:37:30 +03:00
|
|
|
|
|
|
|
/* get intra prediction modes from stream */
|
|
|
|
for(block=0;block<4;block++) {
|
|
|
|
int nA,nB,predpred;
|
|
|
|
int pos = ff_cavs_scan3x3[block];
|
|
|
|
|
|
|
|
nA = h->pred_mode_Y[pos-1];
|
|
|
|
nB = h->pred_mode_Y[pos-3];
|
|
|
|
predpred = FFMIN(nA,nB);
|
|
|
|
if(predpred == NOT_AVAIL) // if either is not available
|
|
|
|
predpred = INTRA_L_LP;
|
|
|
|
if(!get_bits1(gb)){
|
|
|
|
int rem_mode= get_bits(gb, 2);
|
|
|
|
predpred = rem_mode + (rem_mode >= predpred);
|
|
|
|
}
|
|
|
|
h->pred_mode_Y[pos] = predpred;
|
|
|
|
}
|
|
|
|
pred_mode_uv = get_ue_golomb(gb);
|
|
|
|
if(pred_mode_uv > 6) {
|
|
|
|
av_log(h->s.avctx, AV_LOG_ERROR, "illegal intra chroma pred mode\n");
|
|
|
|
return -1;
|
|
|
|
}
|
2007-07-25 08:09:54 +03:00
|
|
|
ff_cavs_modify_mb_i(h, &pred_mode_uv);
|
2007-07-08 10:37:30 +03:00
|
|
|
|
|
|
|
/* get coded block pattern */
|
|
|
|
if(h->pic_type == FF_I_TYPE)
|
|
|
|
cbp_code = get_ue_golomb(gb);
|
|
|
|
if(cbp_code > 63){
|
|
|
|
av_log(h->s.avctx, AV_LOG_ERROR, "illegal intra cbp\n");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
h->cbp = cbp_tab[cbp_code][0];
|
|
|
|
if(h->cbp && !h->qp_fixed)
|
|
|
|
h->qp = (h->qp + get_se_golomb(gb)) & 63; //qp_delta
|
|
|
|
|
|
|
|
/* luma intra prediction interleaved with residual decode/transform/add */
|
|
|
|
for(block=0;block<4;block++) {
|
|
|
|
d = h->cy + h->luma_scan[block];
|
2007-07-25 08:09:54 +03:00
|
|
|
ff_cavs_load_intra_pred_luma(h, top, &left, block);
|
2007-07-08 10:37:30 +03:00
|
|
|
h->intra_pred_l[h->pred_mode_Y[ff_cavs_scan3x3[block]]]
|
|
|
|
(d, top, left, h->l_stride);
|
|
|
|
if(h->cbp & (1<<block))
|
|
|
|
decode_residual_block(h,gb,ff_cavs_intra_dec,1,h->qp,d,h->l_stride);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* chroma intra prediction */
|
2007-07-25 08:09:54 +03:00
|
|
|
ff_cavs_load_intra_pred_chroma(h);
|
2007-07-08 10:37:30 +03:00
|
|
|
h->intra_pred_c[pred_mode_uv](h->cu, &h->top_border_u[h->mbx*10],
|
|
|
|
h->left_border_u, h->c_stride);
|
|
|
|
h->intra_pred_c[pred_mode_uv](h->cv, &h->top_border_v[h->mbx*10],
|
|
|
|
h->left_border_v, h->c_stride);
|
|
|
|
|
|
|
|
decode_residual_chroma(h);
|
|
|
|
ff_cavs_filter(h,I_8X8);
|
|
|
|
set_mv_intra(h);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void decode_mb_p(AVSContext *h, enum mb_t mb_type) {
|
|
|
|
GetBitContext *gb = &h->s.gb;
|
|
|
|
int ref[4];
|
|
|
|
|
2007-07-25 08:09:54 +03:00
|
|
|
ff_cavs_init_mb(h);
|
2007-07-08 10:37:30 +03:00
|
|
|
switch(mb_type) {
|
|
|
|
case P_SKIP:
|
|
|
|
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_PSKIP, BLK_16X16, 0);
|
|
|
|
break;
|
|
|
|
case P_16X16:
|
|
|
|
ref[0] = h->ref_flag ? 0 : get_bits1(gb);
|
|
|
|
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16,ref[0]);
|
|
|
|
break;
|
|
|
|
case P_16X8:
|
|
|
|
ref[0] = h->ref_flag ? 0 : get_bits1(gb);
|
|
|
|
ref[2] = h->ref_flag ? 0 : get_bits1(gb);
|
|
|
|
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, ref[0]);
|
|
|
|
ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, ref[2]);
|
|
|
|
break;
|
|
|
|
case P_8X16:
|
|
|
|
ref[0] = h->ref_flag ? 0 : get_bits1(gb);
|
|
|
|
ref[1] = h->ref_flag ? 0 : get_bits1(gb);
|
|
|
|
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, ref[0]);
|
|
|
|
ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT,BLK_8X16, ref[1]);
|
|
|
|
break;
|
|
|
|
case P_8X8:
|
|
|
|
ref[0] = h->ref_flag ? 0 : get_bits1(gb);
|
|
|
|
ref[1] = h->ref_flag ? 0 : get_bits1(gb);
|
|
|
|
ref[2] = h->ref_flag ? 0 : get_bits1(gb);
|
|
|
|
ref[3] = h->ref_flag ? 0 : get_bits1(gb);
|
|
|
|
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_MEDIAN, BLK_8X8, ref[0]);
|
|
|
|
ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_MEDIAN, BLK_8X8, ref[1]);
|
|
|
|
ff_cavs_mv(h, MV_FWD_X2, MV_FWD_X1, MV_PRED_MEDIAN, BLK_8X8, ref[2]);
|
|
|
|
ff_cavs_mv(h, MV_FWD_X3, MV_FWD_X0, MV_PRED_MEDIAN, BLK_8X8, ref[3]);
|
|
|
|
}
|
|
|
|
ff_cavs_inter(h, mb_type);
|
|
|
|
set_intra_mode_default(h);
|
|
|
|
store_mvs(h);
|
|
|
|
if(mb_type != P_SKIP)
|
|
|
|
decode_residual_inter(h);
|
|
|
|
ff_cavs_filter(h,mb_type);
|
|
|
|
*h->col_type = mb_type;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void decode_mb_b(AVSContext *h, enum mb_t mb_type) {
|
|
|
|
int block;
|
|
|
|
enum sub_mb_t sub_type[4];
|
|
|
|
int flags;
|
|
|
|
|
2007-07-25 08:09:54 +03:00
|
|
|
ff_cavs_init_mb(h);
|
2007-07-08 10:37:30 +03:00
|
|
|
|
|
|
|
/* reset all MVs */
|
|
|
|
h->mv[MV_FWD_X0] = ff_cavs_dir_mv;
|
|
|
|
set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
|
|
|
|
h->mv[MV_BWD_X0] = ff_cavs_dir_mv;
|
|
|
|
set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
|
|
|
|
switch(mb_type) {
|
|
|
|
case B_SKIP:
|
|
|
|
case B_DIRECT:
|
|
|
|
if(!(*h->col_type)) {
|
|
|
|
/* intra MB at co-location, do in-plane prediction */
|
|
|
|
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_BSKIP, BLK_16X16, 1);
|
|
|
|
ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_BSKIP, BLK_16X16, 0);
|
|
|
|
} else
|
|
|
|
/* direct prediction from co-located P MB, block-wise */
|
|
|
|
for(block=0;block<4;block++)
|
|
|
|
mv_pred_direct(h,&h->mv[mv_scan[block]],
|
|
|
|
&h->col_mv[(h->mby*h->mb_width+h->mbx)*4 + block]);
|
|
|
|
break;
|
|
|
|
case B_FWD_16X16:
|
|
|
|
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
|
|
|
|
break;
|
|
|
|
case B_SYM_16X16:
|
|
|
|
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
|
|
|
|
mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X16);
|
|
|
|
break;
|
|
|
|
case B_BWD_16X16:
|
|
|
|
ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_MEDIAN, BLK_16X16, 0);
|
|
|
|
break;
|
|
|
|
case B_8X8:
|
|
|
|
for(block=0;block<4;block++)
|
|
|
|
sub_type[block] = get_bits(&h->s.gb,2);
|
|
|
|
for(block=0;block<4;block++) {
|
|
|
|
switch(sub_type[block]) {
|
|
|
|
case B_SUB_DIRECT:
|
|
|
|
if(!(*h->col_type)) {
|
|
|
|
/* intra MB at co-location, do in-plane prediction */
|
|
|
|
ff_cavs_mv(h, mv_scan[block], mv_scan[block]-3,
|
|
|
|
MV_PRED_BSKIP, BLK_8X8, 1);
|
|
|
|
ff_cavs_mv(h, mv_scan[block]+MV_BWD_OFFS,
|
|
|
|
mv_scan[block]-3+MV_BWD_OFFS,
|
|
|
|
MV_PRED_BSKIP, BLK_8X8, 0);
|
|
|
|
} else
|
|
|
|
mv_pred_direct(h,&h->mv[mv_scan[block]],
|
|
|
|
&h->col_mv[(h->mby*h->mb_width + h->mbx)*4 + block]);
|
|
|
|
break;
|
|
|
|
case B_SUB_FWD:
|
|
|
|
ff_cavs_mv(h, mv_scan[block], mv_scan[block]-3,
|
|
|
|
MV_PRED_MEDIAN, BLK_8X8, 1);
|
|
|
|
break;
|
|
|
|
case B_SUB_SYM:
|
|
|
|
ff_cavs_mv(h, mv_scan[block], mv_scan[block]-3,
|
|
|
|
MV_PRED_MEDIAN, BLK_8X8, 1);
|
|
|
|
mv_pred_sym(h, &h->mv[mv_scan[block]], BLK_8X8);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
for(block=0;block<4;block++) {
|
|
|
|
if(sub_type[block] == B_SUB_BWD)
|
|
|
|
ff_cavs_mv(h, mv_scan[block]+MV_BWD_OFFS,
|
|
|
|
mv_scan[block]+MV_BWD_OFFS-3,
|
|
|
|
MV_PRED_MEDIAN, BLK_8X8, 0);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
assert((mb_type > B_SYM_16X16) && (mb_type < B_8X8));
|
|
|
|
flags = ff_cavs_partition_flags[mb_type];
|
|
|
|
if(mb_type & 1) { /* 16x8 macroblock types */
|
|
|
|
if(flags & FWD0)
|
|
|
|
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, 1);
|
|
|
|
if(flags & SYM0)
|
|
|
|
mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X8);
|
|
|
|
if(flags & FWD1)
|
|
|
|
ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, 1);
|
|
|
|
if(flags & SYM1)
|
|
|
|
mv_pred_sym(h, &h->mv[MV_FWD_X2], BLK_16X8);
|
|
|
|
if(flags & BWD0)
|
|
|
|
ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_TOP, BLK_16X8, 0);
|
|
|
|
if(flags & BWD1)
|
|
|
|
ff_cavs_mv(h, MV_BWD_X2, MV_BWD_A1, MV_PRED_LEFT, BLK_16X8, 0);
|
|
|
|
} else { /* 8x16 macroblock types */
|
|
|
|
if(flags & FWD0)
|
|
|
|
ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, 1);
|
|
|
|
if(flags & SYM0)
|
|
|
|
mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_8X16);
|
|
|
|
if(flags & FWD1)
|
|
|
|
ff_cavs_mv(h,MV_FWD_X1,MV_FWD_C2,MV_PRED_TOPRIGHT,BLK_8X16,1);
|
|
|
|
if(flags & SYM1)
|
|
|
|
mv_pred_sym(h, &h->mv[MV_FWD_X1], BLK_8X16);
|
|
|
|
if(flags & BWD0)
|
|
|
|
ff_cavs_mv(h, MV_BWD_X0, MV_BWD_B3, MV_PRED_LEFT, BLK_8X16, 0);
|
|
|
|
if(flags & BWD1)
|
|
|
|
ff_cavs_mv(h,MV_BWD_X1,MV_BWD_C2,MV_PRED_TOPRIGHT,BLK_8X16,0);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
ff_cavs_inter(h, mb_type);
|
|
|
|
set_intra_mode_default(h);
|
|
|
|
if(mb_type != B_SKIP)
|
|
|
|
decode_residual_inter(h);
|
|
|
|
ff_cavs_filter(h,mb_type);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*****************************************************************************
|
|
|
|
*
|
|
|
|
* slice level
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
static inline int decode_slice_header(AVSContext *h, GetBitContext *gb) {
|
|
|
|
if(h->stc > 0xAF)
|
|
|
|
av_log(h->s.avctx, AV_LOG_ERROR, "unexpected start code 0x%02x\n", h->stc);
|
|
|
|
h->mby = h->stc;
|
|
|
|
if((h->mby == 0) && (!h->qp_fixed)){
|
|
|
|
h->qp_fixed = get_bits1(gb);
|
|
|
|
h->qp = get_bits(gb,6);
|
|
|
|
}
|
|
|
|
/* inter frame or second slice can have weighting params */
|
|
|
|
if((h->pic_type != FF_I_TYPE) || (!h->pic_structure && h->mby >= h->mb_width/2))
|
|
|
|
if(get_bits1(gb)) { //slice_weighting_flag
|
|
|
|
av_log(h->s.avctx, AV_LOG_ERROR,
|
|
|
|
"weighted prediction not yet supported\n");
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void check_for_slice(AVSContext *h) {
|
|
|
|
GetBitContext *gb = &h->s.gb;
|
|
|
|
int align;
|
|
|
|
align = (-get_bits_count(gb)) & 7;
|
|
|
|
if((show_bits_long(gb,24+align) & 0xFFFFFF) == 0x000001) {
|
2007-08-09 04:08:28 +03:00
|
|
|
skip_bits_long(gb,24+align);
|
2007-07-08 10:37:30 +03:00
|
|
|
h->stc = get_bits(gb,8);
|
|
|
|
decode_slice_header(h,gb);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*****************************************************************************
|
|
|
|
*
|
|
|
|
* frame level
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
static int decode_pic(AVSContext *h) {
|
|
|
|
MpegEncContext *s = &h->s;
|
|
|
|
int skip_count;
|
|
|
|
enum mb_t mb_type;
|
|
|
|
|
|
|
|
if (!s->context_initialized) {
|
|
|
|
s->avctx->idct_algo = FF_IDCT_CAVS;
|
|
|
|
if (MPV_common_init(s) < 0)
|
|
|
|
return -1;
|
|
|
|
ff_init_scantable(s->dsp.idct_permutation,&h->scantable,ff_zigzag_direct);
|
|
|
|
}
|
2007-08-09 04:08:28 +03:00
|
|
|
skip_bits(&s->gb,16);//bbv_dwlay
|
2007-07-08 10:37:30 +03:00
|
|
|
if(h->stc == PIC_PB_START_CODE) {
|
|
|
|
h->pic_type = get_bits(&s->gb,2) + FF_I_TYPE;
|
|
|
|
if(h->pic_type > FF_B_TYPE) {
|
|
|
|
av_log(s->avctx, AV_LOG_ERROR, "illegal picture type\n");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
/* make sure we have the reference frames we need */
|
|
|
|
if(!h->DPB[0].data[0] ||
|
|
|
|
(!h->DPB[1].data[0] && h->pic_type == FF_B_TYPE))
|
|
|
|
return -1;
|
|
|
|
} else {
|
|
|
|
h->pic_type = FF_I_TYPE;
|
|
|
|
if(get_bits1(&s->gb))
|
2007-08-09 04:08:28 +03:00
|
|
|
skip_bits(&s->gb,16);//time_code
|
2007-07-08 10:37:30 +03:00
|
|
|
}
|
|
|
|
/* release last B frame */
|
|
|
|
if(h->picture.data[0])
|
|
|
|
s->avctx->release_buffer(s->avctx, (AVFrame *)&h->picture);
|
|
|
|
|
|
|
|
s->avctx->get_buffer(s->avctx, (AVFrame *)&h->picture);
|
|
|
|
ff_cavs_init_pic(h);
|
|
|
|
h->picture.poc = get_bits(&s->gb,8)*2;
|
|
|
|
|
|
|
|
/* get temporal distances and MV scaling factors */
|
|
|
|
if(h->pic_type != FF_B_TYPE) {
|
|
|
|
h->dist[0] = (h->picture.poc - h->DPB[0].poc + 512) % 512;
|
|
|
|
} else {
|
|
|
|
h->dist[0] = (h->DPB[0].poc - h->picture.poc + 512) % 512;
|
|
|
|
}
|
|
|
|
h->dist[1] = (h->picture.poc - h->DPB[1].poc + 512) % 512;
|
|
|
|
h->scale_den[0] = h->dist[0] ? 512/h->dist[0] : 0;
|
|
|
|
h->scale_den[1] = h->dist[1] ? 512/h->dist[1] : 0;
|
|
|
|
if(h->pic_type == FF_B_TYPE) {
|
|
|
|
h->sym_factor = h->dist[0]*h->scale_den[1];
|
|
|
|
} else {
|
|
|
|
h->direct_den[0] = h->dist[0] ? 16384/h->dist[0] : 0;
|
|
|
|
h->direct_den[1] = h->dist[1] ? 16384/h->dist[1] : 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
if(s->low_delay)
|
|
|
|
get_ue_golomb(&s->gb); //bbv_check_times
|
|
|
|
h->progressive = get_bits1(&s->gb);
|
|
|
|
if(h->progressive)
|
|
|
|
h->pic_structure = 1;
|
|
|
|
else if(!(h->pic_structure = get_bits1(&s->gb) && (h->stc == PIC_PB_START_CODE)) )
|
2007-08-09 04:08:28 +03:00
|
|
|
skip_bits1(&s->gb); //advanced_pred_mode_disable
|
2007-07-08 10:37:30 +03:00
|
|
|
skip_bits1(&s->gb); //top_field_first
|
|
|
|
skip_bits1(&s->gb); //repeat_first_field
|
|
|
|
h->qp_fixed = get_bits1(&s->gb);
|
|
|
|
h->qp = get_bits(&s->gb,6);
|
|
|
|
if(h->pic_type == FF_I_TYPE) {
|
|
|
|
if(!h->progressive && !h->pic_structure)
|
|
|
|
skip_bits1(&s->gb);//what is this?
|
|
|
|
skip_bits(&s->gb,4); //reserved bits
|
|
|
|
} else {
|
|
|
|
if(!(h->pic_type == FF_B_TYPE && h->pic_structure == 1))
|
|
|
|
h->ref_flag = get_bits1(&s->gb);
|
|
|
|
skip_bits(&s->gb,4); //reserved bits
|
|
|
|
h->skip_mode_flag = get_bits1(&s->gb);
|
|
|
|
}
|
|
|
|
h->loop_filter_disable = get_bits1(&s->gb);
|
|
|
|
if(!h->loop_filter_disable && get_bits1(&s->gb)) {
|
|
|
|
h->alpha_offset = get_se_golomb(&s->gb);
|
|
|
|
h->beta_offset = get_se_golomb(&s->gb);
|
|
|
|
} else {
|
|
|
|
h->alpha_offset = h->beta_offset = 0;
|
|
|
|
}
|
|
|
|
check_for_slice(h);
|
|
|
|
if(h->pic_type == FF_I_TYPE) {
|
|
|
|
do {
|
|
|
|
decode_mb_i(h, 0);
|
2007-07-25 08:09:54 +03:00
|
|
|
} while(ff_cavs_next_mb(h));
|
2007-07-08 10:37:30 +03:00
|
|
|
} else if(h->pic_type == FF_P_TYPE) {
|
|
|
|
do {
|
|
|
|
if(h->skip_mode_flag) {
|
|
|
|
skip_count = get_ue_golomb(&s->gb);
|
|
|
|
while(skip_count--) {
|
|
|
|
decode_mb_p(h,P_SKIP);
|
2007-07-25 08:09:54 +03:00
|
|
|
if(!ff_cavs_next_mb(h))
|
2007-07-08 10:37:30 +03:00
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
mb_type = get_ue_golomb(&s->gb) + P_16X16;
|
|
|
|
} else
|
|
|
|
mb_type = get_ue_golomb(&s->gb) + P_SKIP;
|
|
|
|
if(mb_type > P_8X8) {
|
|
|
|
decode_mb_i(h, mb_type - P_8X8 - 1);
|
|
|
|
} else
|
|
|
|
decode_mb_p(h,mb_type);
|
2007-07-25 08:09:54 +03:00
|
|
|
} while(ff_cavs_next_mb(h));
|
2007-07-08 10:37:30 +03:00
|
|
|
} else { /* FF_B_TYPE */
|
|
|
|
do {
|
|
|
|
if(h->skip_mode_flag) {
|
|
|
|
skip_count = get_ue_golomb(&s->gb);
|
|
|
|
while(skip_count--) {
|
|
|
|
decode_mb_b(h,B_SKIP);
|
2007-07-25 08:09:54 +03:00
|
|
|
if(!ff_cavs_next_mb(h))
|
2007-07-08 10:37:30 +03:00
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
mb_type = get_ue_golomb(&s->gb) + B_DIRECT;
|
|
|
|
} else
|
|
|
|
mb_type = get_ue_golomb(&s->gb) + B_SKIP;
|
|
|
|
if(mb_type > B_8X8) {
|
|
|
|
decode_mb_i(h, mb_type - B_8X8 - 1);
|
|
|
|
} else
|
|
|
|
decode_mb_b(h,mb_type);
|
2007-07-25 08:09:54 +03:00
|
|
|
} while(ff_cavs_next_mb(h));
|
2007-07-08 10:37:30 +03:00
|
|
|
}
|
|
|
|
done:
|
|
|
|
if(h->pic_type != FF_B_TYPE) {
|
|
|
|
if(h->DPB[1].data[0])
|
|
|
|
s->avctx->release_buffer(s->avctx, (AVFrame *)&h->DPB[1]);
|
|
|
|
memcpy(&h->DPB[1], &h->DPB[0], sizeof(Picture));
|
|
|
|
memcpy(&h->DPB[0], &h->picture, sizeof(Picture));
|
|
|
|
memset(&h->picture,0,sizeof(Picture));
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*****************************************************************************
|
|
|
|
*
|
|
|
|
* headers and interface
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
static int decode_seq_header(AVSContext *h) {
|
|
|
|
MpegEncContext *s = &h->s;
|
|
|
|
int frame_rate_code;
|
|
|
|
|
|
|
|
h->profile = get_bits(&s->gb,8);
|
|
|
|
h->level = get_bits(&s->gb,8);
|
|
|
|
skip_bits1(&s->gb); //progressive sequence
|
|
|
|
s->width = get_bits(&s->gb,14);
|
|
|
|
s->height = get_bits(&s->gb,14);
|
|
|
|
skip_bits(&s->gb,2); //chroma format
|
|
|
|
skip_bits(&s->gb,3); //sample_precision
|
|
|
|
h->aspect_ratio = get_bits(&s->gb,4);
|
|
|
|
frame_rate_code = get_bits(&s->gb,4);
|
|
|
|
skip_bits(&s->gb,18);//bit_rate_lower
|
|
|
|
skip_bits1(&s->gb); //marker_bit
|
|
|
|
skip_bits(&s->gb,12);//bit_rate_upper
|
|
|
|
s->low_delay = get_bits1(&s->gb);
|
|
|
|
h->mb_width = (s->width + 15) >> 4;
|
|
|
|
h->mb_height = (s->height + 15) >> 4;
|
|
|
|
h->s.avctx->time_base.den = ff_frame_rate_tab[frame_rate_code].num;
|
|
|
|
h->s.avctx->time_base.num = ff_frame_rate_tab[frame_rate_code].den;
|
|
|
|
h->s.avctx->width = s->width;
|
|
|
|
h->s.avctx->height = s->height;
|
|
|
|
if(!h->top_qp)
|
|
|
|
ff_cavs_init_top_lines(h);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void cavs_flush(AVCodecContext * avctx) {
|
|
|
|
AVSContext *h = avctx->priv_data;
|
|
|
|
h->got_keyframe = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int cavs_decode_frame(AVCodecContext * avctx,void *data, int *data_size,
|
2008-02-01 05:59:06 +02:00
|
|
|
const uint8_t * buf, int buf_size) {
|
2007-07-08 10:37:30 +03:00
|
|
|
AVSContext *h = avctx->priv_data;
|
|
|
|
MpegEncContext *s = &h->s;
|
|
|
|
int input_size;
|
|
|
|
const uint8_t *buf_end;
|
|
|
|
const uint8_t *buf_ptr;
|
|
|
|
AVFrame *picture = data;
|
2007-08-23 10:02:27 +03:00
|
|
|
uint32_t stc = -1;
|
2007-07-08 10:37:30 +03:00
|
|
|
|
|
|
|
s->avctx = avctx;
|
|
|
|
|
|
|
|
if (buf_size == 0) {
|
|
|
|
if(!s->low_delay && h->DPB[0].data[0]) {
|
|
|
|
*data_size = sizeof(AVPicture);
|
|
|
|
*picture = *(AVFrame *) &h->DPB[0];
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
buf_ptr = buf;
|
|
|
|
buf_end = buf + buf_size;
|
|
|
|
for(;;) {
|
|
|
|
buf_ptr = ff_find_start_code(buf_ptr,buf_end, &stc);
|
|
|
|
if(stc & 0xFFFFFE00)
|
|
|
|
return FFMAX(0, buf_ptr - buf - s->parse_context.last_index);
|
|
|
|
input_size = (buf_end - buf_ptr)*8;
|
|
|
|
switch(stc) {
|
|
|
|
case CAVS_START_CODE:
|
|
|
|
init_get_bits(&s->gb, buf_ptr, input_size);
|
|
|
|
decode_seq_header(h);
|
|
|
|
break;
|
|
|
|
case PIC_I_START_CODE:
|
|
|
|
if(!h->got_keyframe) {
|
|
|
|
if(h->DPB[0].data[0])
|
|
|
|
avctx->release_buffer(avctx, (AVFrame *)&h->DPB[0]);
|
|
|
|
if(h->DPB[1].data[0])
|
|
|
|
avctx->release_buffer(avctx, (AVFrame *)&h->DPB[1]);
|
|
|
|
h->got_keyframe = 1;
|
|
|
|
}
|
|
|
|
case PIC_PB_START_CODE:
|
|
|
|
*data_size = 0;
|
|
|
|
if(!h->got_keyframe)
|
|
|
|
break;
|
|
|
|
init_get_bits(&s->gb, buf_ptr, input_size);
|
|
|
|
h->stc = stc;
|
|
|
|
if(decode_pic(h))
|
|
|
|
break;
|
|
|
|
*data_size = sizeof(AVPicture);
|
|
|
|
if(h->pic_type != FF_B_TYPE) {
|
|
|
|
if(h->DPB[1].data[0]) {
|
|
|
|
*picture = *(AVFrame *) &h->DPB[1];
|
|
|
|
} else {
|
|
|
|
*data_size = 0;
|
|
|
|
}
|
|
|
|
} else
|
|
|
|
*picture = *(AVFrame *) &h->picture;
|
|
|
|
break;
|
|
|
|
case EXT_START_CODE:
|
|
|
|
//mpeg_decode_extension(avctx,buf_ptr, input_size);
|
|
|
|
break;
|
|
|
|
case USER_START_CODE:
|
|
|
|
//mpeg_decode_user_data(avctx,buf_ptr, input_size);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
if (stc >= SLICE_MIN_START_CODE &&
|
|
|
|
stc <= SLICE_MAX_START_CODE) {
|
|
|
|
init_get_bits(&s->gb, buf_ptr, input_size);
|
|
|
|
decode_slice_header(h, &s->gb);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
AVCodec cavs_decoder = {
|
|
|
|
"cavs",
|
|
|
|
CODEC_TYPE_VIDEO,
|
|
|
|
CODEC_ID_CAVS,
|
|
|
|
sizeof(AVSContext),
|
|
|
|
ff_cavs_init,
|
|
|
|
NULL,
|
|
|
|
ff_cavs_end,
|
|
|
|
cavs_decode_frame,
|
|
|
|
CODEC_CAP_DR1 | CODEC_CAP_DELAY,
|
|
|
|
.flush= cavs_flush,
|
2008-06-13 00:50:13 +03:00
|
|
|
.long_name= NULL_IF_CONFIG_SMALL("Chinese AVS video (AVS1-P2, JiZhun profile)"),
|
2007-07-08 10:37:30 +03:00
|
|
|
};
|