Code/Resource
Windows Develop
Linux-Unix program
Internet-Socket-Network
Web Server
Browser Client
Ftp Server
Ftp Client
Browser Plugins
Proxy Server
Email Server
Email Client
WEB Mail
Firewall-Security
Telnet Server
Telnet Client
ICQ-IM-Chat
Search Engine
Sniffer Package capture
Remote Control
xml-soap-webservice
P2P
WEB(ASP,PHP,...)
TCP/IP Stack
SNMP
Grid Computing
SilverLight
DNS
Cluster Service
Network Security
Communication-Mobile
Game Program
Editor
Multimedia program
Graph program
Compiler program
Compress-Decompress algrithms
Crypt_Decrypt algrithms
Mathimatics-Numerical algorithms
MultiLanguage
Disk/Storage
Java Develop
assembly language
Applications
Other systems
Database system
Embeded-SCM Develop
FlashMX/Flex
source in ebook
Delphi VCL
OS Develop
MiddleWare
MPI
MacOS develop
LabView
ELanguage
Software/Tools
E-Books
Artical/Document
slicetype_decision.c
Package: chapter15.rar [view]
Upload User: hjq518
Upload Date: 2021-12-09
Package Size: 5084k
Code Size: 14k
Category:
Audio program
Development Platform:
Visual C++
- /*****************************************************************************
- * slicetype_decision.c: h264 encoder library
- *****************************************************************************
- * Copyright (C) 2005 Loren Merritt
- *
- * Authors: Loren Merritt <lorenm@u.washington.edu>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- #include <string.h>
- #include <math.h>
- #include <limits.h>
- #include "common/common.h"
- #include "common/cpu.h"
- #include "macroblock.h"
- #include "me.h"
- static void x264_lowres_context_init( x264_t *h, x264_mb_analysis_t *a )
- {
- a->i_qp = 12; // arbitrary, but low because SATD scores are 1/4 normal
- a->i_lambda = i_qp0_cost_table[ a->i_qp ];
- x264_mb_analyse_load_costs( h, a );
- h->mb.i_me_method = X264_MIN( X264_ME_HEX, h->param.analyse.i_me_method ); // maybe dia?
- h->mb.i_subpel_refine = 4; // 3 should be enough, but not tweaking for speed now
- h->mb.b_chroma_me = 0;
- }
- int x264_slicetype_mb_cost( x264_t *h, x264_mb_analysis_t *a,
- x264_frame_t **frames, int p0, int p1, int b,
- int dist_scale_factor )
- {
- x264_frame_t *fref0 = frames[p0];
- x264_frame_t *fref1 = frames[p1];
- x264_frame_t *fenc = frames[b];
- const int b_bidir = (b < p1);
- const int i_mb_x = h->mb.i_mb_x;
- const int i_mb_y = h->mb.i_mb_y;
- const int i_mb_stride = h->sps->i_mb_width;
- const int i_mb_xy = i_mb_x + i_mb_y * i_mb_stride;
- const int i_stride = fenc->i_stride_lowres;
- const int i_pel_offset = 8 * ( i_mb_x + i_mb_y * i_stride );
- uint8_t pix1[9*9], pix2[8*8];
- x264_me_t m[2];
- int mvc[4][2], i_mvc;
- int i_bcost = COST_MAX;
- int i_cost_bak;
- int l, i;
- h->mb.pic.p_fenc[0] = h->mb.pic.fenc_buf;
- h->mc.copy[PIXEL_8x8]( h->mb.pic.p_fenc[0], FENC_STRIDE, &fenc->lowres[0][i_pel_offset], i_stride, 8 );
- if( !p0 && !p1 && !b )
- goto lowres_intra_mb;
- // no need for h->mb.mv_min[]
- h->mb.mv_min_fpel[0] = -8*h->mb.i_mb_x - 4;
- h->mb.mv_max_fpel[0] = 8*( h->sps->i_mb_width - h->mb.i_mb_x - 1 ) + 4;
- h->mb.mv_min_spel[0] = 4*( h->mb.mv_min_fpel[0] - 8 );
- h->mb.mv_max_spel[0] = 4*( h->mb.mv_max_fpel[0] + 8 );
- if( h->mb.i_mb_x <= 1)
- {
- h->mb.mv_min_fpel[1] = -8*h->mb.i_mb_y - 4;
- h->mb.mv_max_fpel[1] = 8*( h->sps->i_mb_height - h->mb.i_mb_y - 1 ) + 4;
- h->mb.mv_min_spel[1] = 4*( h->mb.mv_min_fpel[1] - 8 );
- h->mb.mv_max_spel[1] = 4*( h->mb.mv_max_fpel[1] + 8 );
- }
- #define LOAD_HPELS_LUMA(dst, src)
- {
- (dst)[0] = &(src)[0][i_pel_offset];
- (dst)[1] = &(src)[1][i_pel_offset];
- (dst)[2] = &(src)[2][i_pel_offset];
- (dst)[3] = &(src)[3][i_pel_offset];
- }
- #define SAVE_MVS( mv0, mv1 )
- {
- fenc->mv[0][i_mb_xy][0] = mv0[0];
- fenc->mv[0][i_mb_xy][1] = mv0[1];
- if( b_bidir )
- {
- fenc->mv[1][i_mb_xy][0] = mv1[0];
- fenc->mv[1][i_mb_xy][1] = mv1[1];
- }
- }
- #define CLIP_MV( mv )
- {
- mv[0] = x264_clip3( mv[0], h->mb.mv_min_spel[0], h->mb.mv_max_spel[0] );
- mv[1] = x264_clip3( mv[1], h->mb.mv_min_spel[1], h->mb.mv_max_spel[1] );
- }
- #define TRY_BIDIR( mv0, mv1, penalty )
- {
- int stride2 = 8;
- uint8_t *src2;
- int i_cost;
- h->mc.mc_luma( m[0].p_fref, m[0].i_stride[0], pix1, 8,
- (mv0)[0], (mv0)[1], 8, 8 );
- src2 = h->mc.get_ref( m[1].p_fref, m[1].i_stride[0], pix2, &stride2,
- (mv1)[0], (mv1)[1], 8, 8 );
- h->mc.avg[PIXEL_8x8]( pix1, 8, src2, stride2 );
- i_cost = penalty + h->pixf.mbcmp[PIXEL_8x8](
- m[0].p_fenc[0], FENC_STRIDE, pix1, 8 );
- if( i_bcost > i_cost )
- {
- i_bcost = i_cost;
- SAVE_MVS( mv0, mv1 );
- }
- }
- m[0].i_pixel = PIXEL_8x8;
- m[0].p_cost_mv = a->p_cost_mv;
- m[0].i_stride[0] = i_stride;
- m[0].p_fenc[0] = h->mb.pic.p_fenc[0];
- LOAD_HPELS_LUMA( m[0].p_fref, fref0->lowres );
- if( b_bidir )
- {
- int16_t *mvr = fref1->mv[0][i_mb_xy];
- int dmv[2][2];
- int mv0[2] = {0,0};
- m[1] = m[0];
- LOAD_HPELS_LUMA( m[1].p_fref, fref1->lowres );
- dmv[0][0] = ( mvr[0] * dist_scale_factor + 128 ) >> 8;
- dmv[0][1] = ( mvr[1] * dist_scale_factor + 128 ) >> 8;
- dmv[1][0] = dmv[0][0] - mvr[0];
- dmv[1][1] = dmv[0][1] - mvr[1];
- CLIP_MV( dmv[0] );
- CLIP_MV( dmv[1] );
- TRY_BIDIR( dmv[0], dmv[1], 0 );
- if( dmv[0][0] || dmv[0][1] || dmv[1][0] || dmv[1][1] )
- TRY_BIDIR( mv0, mv0, 0 );
- // if( i_bcost < 60 ) // arbitrary threshold
- // return i_bcost;
- }
- i_cost_bak = i_bcost;
- for( l = 0; l < 1 + b_bidir; l++ )
- {
- int16_t (*fenc_mv)[2] = &fenc->mv[l][i_mb_xy];
- mvc[0][0] = fenc_mv[-1][0];
- mvc[0][1] = fenc_mv[-1][1];
- mvc[1][0] = fenc_mv[-i_mb_stride][0];
- mvc[1][1] = fenc_mv[-i_mb_stride][1];
- mvc[2][0] = fenc_mv[-i_mb_stride+1][0];
- mvc[2][1] = fenc_mv[-i_mb_stride+1][1];
- mvc[3][0] = fenc_mv[-i_mb_stride-1][0];
- mvc[3][1] = fenc_mv[-i_mb_stride-1][1];
- m[l].mvp[0] = x264_median( mvc[0][0], mvc[1][0], mvc[2][0] );
- m[l].mvp[1] = x264_median( mvc[0][1], mvc[1][1], mvc[2][1] );
- i_mvc = 4;
- x264_me_search( h, &m[l], mvc, i_mvc );
- i_bcost = X264_MIN( i_bcost, m[l].cost + 3 );
- }
- if( b_bidir && (m[0].mv[0] || m[0].mv[1] || m[1].mv[0] || m[1].mv[1]) )
- TRY_BIDIR( m[0].mv, m[1].mv, 5 );
- if( i_bcost < i_cost_bak )
- SAVE_MVS( m[0].mv, m[1].mv );
- lowres_intra_mb:
- {
- uint8_t pix_buf[9*FDEC_STRIDE];
- uint8_t *pix = &pix_buf[8+FDEC_STRIDE - 1];
- uint8_t *src = &fenc->lowres[0][i_pel_offset - 1];
- int intra_penalty = 5 + 10 * b_bidir;
- i_cost_bak = i_bcost;
- memcpy( pix-FDEC_STRIDE, src-i_stride, 9 );
- for( i=0; i<8; i++ )
- pix[i*FDEC_STRIDE] = src[i*i_stride];
- pix++;
- for( i = I_PRED_CHROMA_DC; i <= I_PRED_CHROMA_P; i++ )
- {
- int i_cost;
- h->predict_8x8c[i]( pix );
- i_cost = h->pixf.mbcmp[PIXEL_8x8]( pix, FDEC_STRIDE, h->mb.pic.p_fenc[0], FENC_STRIDE ) + intra_penalty;
- i_bcost = X264_MIN( i_bcost, i_cost );
- }
- if( i_bcost != i_cost_bak )
- {
- if( !b_bidir )
- fenc->i_intra_mbs[b-p0]++;
- if( p1 > p0+1 )
- i_bcost = i_bcost * 9 / 8; // arbitray penalty for I-blocks in and after B-frames
- }
- }
- return i_bcost;
- }
- #undef TRY_BIDIR
- #undef SAVE_MVS
- int x264_slicetype_frame_cost( x264_t *h, x264_mb_analysis_t *a,
- x264_frame_t **frames, int p0, int p1, int b )
- {
- int i_score = 0;
- int dist_scale_factor = 128;
- /* Check whether we already evaluated this frame
- * If we have tried this frame as P, then we have also tried
- * the preceding frames as B. (is this still true?) */
- if( frames[b]->i_cost_est[b-p0][p1-b] >= 0 )
- return frames[b]->i_cost_est[b-p0][p1-b];
- /* Init MVs so that we don't have to check edge conditions when loading predictors. */
- /* FIXME: not needed every time */
- memset( frames[b]->mv[0], 0, h->sps->i_mb_height * h->sps->i_mb_width * 2*sizeof(int16_t) );
- if( b != p1 )
- memset( frames[b]->mv[1], 0, h->sps->i_mb_height * h->sps->i_mb_width * 2*sizeof(int16_t) );
- if( b == p1 )
- frames[b]->i_intra_mbs[b-p0] = 0;
- if( p1 != p0 )
- dist_scale_factor = ( ((b-p0) << 8) + ((p1-p0) >> 1) ) / (p1-p0);
- /* Skip the outermost ring of macroblocks, to simplify mv range and intra prediction. */
- for( h->mb.i_mb_y = 1; h->mb.i_mb_y < h->sps->i_mb_height - 1; h->mb.i_mb_y++ )
- for( h->mb.i_mb_x = 1; h->mb.i_mb_x < h->sps->i_mb_width - 1; h->mb.i_mb_x++ )
- i_score += x264_slicetype_mb_cost( h, a, frames, p0, p1, b, dist_scale_factor );
- if( b != p1 )
- i_score = i_score * 100 / (120 + h->param.i_bframe_bias);
- frames[b]->i_cost_est[b-p0][p1-b] = i_score;
- // fprintf( stderr, "frm %d %c(%d,%d): %6d I:%d n", frames[b]->i_frame,
- // (p1==0?'I':b<p1?'B':'P'), b-p0, p1-b, i_score, frames[b]->i_intra_mbs[b-p0] );
- x264_cpu_restore( h->param.cpu );
- return i_score;
- }
- void x264_slicetype_analyse( x264_t *h )
- {
- x264_mb_analysis_t a;
- x264_frame_t *frames[X264_BFRAME_MAX+3] = { NULL, };
- int num_frames;
- int keyint_limit;
- int j;
- int i_mb_count = (h->sps->i_mb_width - 2) * (h->sps->i_mb_height - 2);
- int cost1p0, cost2p0, cost1b1, cost2p1;
- if( !h->frames.last_nonb )
- return;
- frames[0] = h->frames.last_nonb;
- for( j = 0; h->frames.next[j]; j++ )
- frames[j+1] = h->frames.next[j];
- keyint_limit = h->param.i_keyint_max - frames[0]->i_frame + h->frames.i_last_idr - 1;
- num_frames = X264_MIN( j, keyint_limit );
- if( num_frames == 0 )
- return;
- if( num_frames == 1 )
- {
- no_b_frames:
- frames[1]->i_type = X264_TYPE_P;
- return;
- }
- x264_lowres_context_init( h, &a );
- cost2p1 = x264_slicetype_frame_cost( h, &a, frames, 0, 2, 2 );
- if( frames[2]->i_intra_mbs[2] > i_mb_count / 2 )
- goto no_b_frames;
- cost1b1 = x264_slicetype_frame_cost( h, &a, frames, 0, 2, 1 );
- cost1p0 = x264_slicetype_frame_cost( h, &a, frames, 0, 1, 1 );
- cost2p0 = x264_slicetype_frame_cost( h, &a, frames, 1, 2, 2 );
- // fprintf( stderr, "PP: %d + %d <=> BP: %d + %d n",
- // cost1p0, cost2p0, cost1b1, cost2p1 );
- if( cost1p0 + cost2p0 < cost1b1 + cost2p1 )
- goto no_b_frames;
- // arbitrary and untuned
- #define INTER_THRESH 300
- #define P_SENS_BIAS (50 - h->param.i_bframe_bias)
- frames[1]->i_type = X264_TYPE_B;
- for( j = 2; j <= X264_MIN( h->param.i_bframe, num_frames-1 ); j++ )
- {
- int pthresh = X264_MAX(INTER_THRESH - P_SENS_BIAS * (j-1), INTER_THRESH/10);
- int pcost = x264_slicetype_frame_cost( h, &a, frames, 0, j+1, j+1 );
- // fprintf( stderr, "frm%d+%d: %d <=> %d, I:%d/%d n",
- // frames[0]->i_frame, j-1, pthresh, pcost/i_mb_count,
- // frames[j+1]->i_intra_mbs[j+1], i_mb_count );
- if( pcost > pthresh*i_mb_count || frames[j+1]->i_intra_mbs[j+1] > i_mb_count/3 )
- {
- frames[j]->i_type = X264_TYPE_P;
- break;
- }
- else
- frames[j]->i_type = X264_TYPE_B;
- }
- }
- void x264_slicetype_decide( x264_t *h )
- {
- x264_frame_t *frm;
- int bframes;
- int i;
- if( h->frames.next[0] == NULL )
- return;
- if( h->param.rc.b_stat_read )
- {
- /* Use the frame types from the first pass */
- for( i = 0; h->frames.next[i] != NULL; i++ )
- h->frames.next[i]->i_type =
- x264_ratecontrol_slice_type( h, h->frames.next[i]->i_frame );
- }
- else if( h->param.i_bframe && h->param.b_bframe_adaptive )
- x264_slicetype_analyse( h );
- for( bframes = 0;; bframes++ )
- {
- frm = h->frames.next[bframes];
- /* Limit GOP size */
- if( frm->i_frame - h->frames.i_last_idr >= h->param.i_keyint_max )
- {
- if( frm->i_type == X264_TYPE_AUTO )
- frm->i_type = X264_TYPE_IDR;
- if( frm->i_type != X264_TYPE_IDR )
- x264_log( h, X264_LOG_ERROR, "specified frame type (%d) is not compatible with keyframe intervaln", frm->i_type );
- }
- if( frm->i_type == X264_TYPE_IDR )
- {
- /* Close GOP */
- if( bframes > 0 )
- {
- bframes--;
- h->frames.next[bframes]->i_type = X264_TYPE_P;
- }
- else
- {
- h->i_frame_num = 0;
- }
- }
- if( bframes == h->param.i_bframe
- || h->frames.next[bframes+1] == NULL )
- {
- if( IS_X264_TYPE_B( frm->i_type ) )
- x264_log( h, X264_LOG_ERROR, "specified frame type is not compatible with max B-framesn" );
- if( frm->i_type == X264_TYPE_AUTO
- || IS_X264_TYPE_B( frm->i_type ) )
- frm->i_type = X264_TYPE_P;
- }
- if( frm->i_type != X264_TYPE_AUTO && frm->i_type != X264_TYPE_B && frm->i_type != X264_TYPE_BREF )
- break;
- frm->i_type = X264_TYPE_B;
- }
- }
- int x264_rc_analyse_slice( x264_t *h )
- {
- int p1 = 0;
- x264_mb_analysis_t a;
- x264_frame_t *frames[X264_BFRAME_MAX+2] = { NULL, };
- if( IS_X264_TYPE_I(h->fenc->i_type) )
- return x264_slicetype_frame_cost( h, &a, &h->fenc, 0, 0, 0 );
- while( h->frames.current[p1] && IS_X264_TYPE_B( h->frames.current[p1]->i_type ) )
- p1++;
- p1++;
- if( h->fenc->i_cost_est[p1][0] >= 0 )
- return h->fenc->i_cost_est[p1][0];
- frames[0] = h->fref0[0];
- frames[p1] = h->fenc;
- x264_lowres_context_init( h, &a );
- return x264_slicetype_frame_cost( h, &a, frames, 0, p1, p1 );
- }