mirror of
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842 lines
27 KiB
C
842 lines
27 KiB
C
/*
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* ITU H263 bitstream encoder
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* Copyright (c) 2000,2001 Fabrice Bellard
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* H263+ support.
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* Copyright (c) 2001 Juan J. Sierralta P
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* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* h263 bitstream encoder.
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*/
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//#define DEBUG
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#include <limits.h>
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#include "dsputil.h"
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#include "avcodec.h"
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#include "mpegvideo.h"
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#include "h263.h"
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#include "mathops.h"
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#include "unary.h"
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#include "flv.h"
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#include "mpeg4video.h"
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#include "internal.h"
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//#undef NDEBUG
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//#include <assert.h>
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/**
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* Table of number of bits a motion vector component needs.
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*/
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static uint8_t mv_penalty[MAX_FCODE+1][MAX_MV*2+1];
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/**
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* Minimal fcode that a motion vector component would need.
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*/
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static uint8_t fcode_tab[MAX_MV*2+1];
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/**
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* Minimal fcode that a motion vector component would need in umv.
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* All entries in this table are 1.
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*/
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static uint8_t umv_fcode_tab[MAX_MV*2+1];
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//unified encoding tables for run length encoding of coefficients
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//unified in the sense that the specification specifies the encoding in several steps.
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static uint8_t uni_h263_intra_aic_rl_len [64*64*2*2];
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static uint8_t uni_h263_inter_rl_len [64*64*2*2];
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//#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128 + (run)*256 + (level))
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//#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run) + (level)*64)
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#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run)*128 + (level))
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static const uint8_t wrong_run[102] = {
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1, 2, 3, 5, 4, 10, 9, 8,
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11, 15, 17, 16, 23, 22, 21, 20,
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19, 18, 25, 24, 27, 26, 11, 7,
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6, 1, 2, 13, 2, 2, 2, 2,
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6, 12, 3, 9, 1, 3, 4, 3,
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7, 4, 1, 1, 5, 5, 14, 6,
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1, 7, 1, 8, 1, 1, 1, 1,
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10, 1, 1, 5, 9, 17, 25, 24,
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29, 33, 32, 41, 2, 23, 28, 31,
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3, 22, 30, 4, 27, 40, 8, 26,
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6, 39, 7, 38, 16, 37, 15, 10,
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11, 12, 13, 14, 1, 21, 20, 18,
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19, 2, 1, 34, 35, 36
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};
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/**
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* Return the 4 bit value that specifies the given aspect ratio.
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* This may be one of the standard aspect ratios or it specifies
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* that the aspect will be stored explicitly later.
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*/
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av_const int ff_h263_aspect_to_info(AVRational aspect){
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int i;
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if(aspect.num==0) aspect= (AVRational){1,1};
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for(i=1; i<6; i++){
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if(av_cmp_q(ff_h263_pixel_aspect[i], aspect) == 0){
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return i;
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}
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}
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return FF_ASPECT_EXTENDED;
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}
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void h263_encode_picture_header(MpegEncContext * s, int picture_number)
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{
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int format, coded_frame_rate, coded_frame_rate_base, i, temp_ref;
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int best_clock_code=1;
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int best_divisor=60;
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int best_error= INT_MAX;
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if(s->h263_plus){
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for(i=0; i<2; i++){
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int div, error;
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div= (s->avctx->time_base.num*1800000LL + 500LL*s->avctx->time_base.den) / ((1000LL+i)*s->avctx->time_base.den);
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div= av_clip(div, 1, 127);
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error= FFABS(s->avctx->time_base.num*1800000LL - (1000LL+i)*s->avctx->time_base.den*div);
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if(error < best_error){
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best_error= error;
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best_divisor= div;
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best_clock_code= i;
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}
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}
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}
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s->custom_pcf= best_clock_code!=1 || best_divisor!=60;
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coded_frame_rate= 1800000;
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coded_frame_rate_base= (1000+best_clock_code)*best_divisor;
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avpriv_align_put_bits(&s->pb);
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/* Update the pointer to last GOB */
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s->ptr_lastgob = put_bits_ptr(&s->pb);
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put_bits(&s->pb, 22, 0x20); /* PSC */
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temp_ref= s->picture_number * (int64_t)coded_frame_rate * s->avctx->time_base.num / //FIXME use timestamp
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(coded_frame_rate_base * (int64_t)s->avctx->time_base.den);
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put_sbits(&s->pb, 8, temp_ref); /* TemporalReference */
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put_bits(&s->pb, 1, 1); /* marker */
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put_bits(&s->pb, 1, 0); /* h263 id */
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put_bits(&s->pb, 1, 0); /* split screen off */
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put_bits(&s->pb, 1, 0); /* camera off */
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put_bits(&s->pb, 1, 0); /* freeze picture release off */
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format = ff_match_2uint16(h263_format, FF_ARRAY_ELEMS(h263_format), s->width, s->height);
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if (!s->h263_plus) {
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/* H.263v1 */
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put_bits(&s->pb, 3, format);
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put_bits(&s->pb, 1, (s->pict_type == AV_PICTURE_TYPE_P));
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/* By now UMV IS DISABLED ON H.263v1, since the restrictions
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of H.263v1 UMV implies to check the predicted MV after
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calculation of the current MB to see if we're on the limits */
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put_bits(&s->pb, 1, 0); /* Unrestricted Motion Vector: off */
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put_bits(&s->pb, 1, 0); /* SAC: off */
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put_bits(&s->pb, 1, s->obmc); /* Advanced Prediction */
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put_bits(&s->pb, 1, 0); /* only I/P frames, no PB frame */
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put_bits(&s->pb, 5, s->qscale);
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put_bits(&s->pb, 1, 0); /* Continuous Presence Multipoint mode: off */
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} else {
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int ufep=1;
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/* H.263v2 */
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/* H.263 Plus PTYPE */
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put_bits(&s->pb, 3, 7);
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put_bits(&s->pb,3,ufep); /* Update Full Extended PTYPE */
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if (format == 8)
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put_bits(&s->pb,3,6); /* Custom Source Format */
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else
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put_bits(&s->pb, 3, format);
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put_bits(&s->pb,1, s->custom_pcf);
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put_bits(&s->pb,1, s->umvplus); /* Unrestricted Motion Vector */
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put_bits(&s->pb,1,0); /* SAC: off */
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put_bits(&s->pb,1,s->obmc); /* Advanced Prediction Mode */
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put_bits(&s->pb,1,s->h263_aic); /* Advanced Intra Coding */
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put_bits(&s->pb,1,s->loop_filter); /* Deblocking Filter */
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put_bits(&s->pb,1,s->h263_slice_structured); /* Slice Structured */
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put_bits(&s->pb,1,0); /* Reference Picture Selection: off */
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put_bits(&s->pb,1,0); /* Independent Segment Decoding: off */
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put_bits(&s->pb,1,s->alt_inter_vlc); /* Alternative Inter VLC */
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put_bits(&s->pb,1,s->modified_quant); /* Modified Quantization: */
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put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */
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put_bits(&s->pb,3,0); /* Reserved */
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put_bits(&s->pb, 3, s->pict_type == AV_PICTURE_TYPE_P);
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put_bits(&s->pb,1,0); /* Reference Picture Resampling: off */
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put_bits(&s->pb,1,0); /* Reduced-Resolution Update: off */
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put_bits(&s->pb,1,s->no_rounding); /* Rounding Type */
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put_bits(&s->pb,2,0); /* Reserved */
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put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */
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/* This should be here if PLUSPTYPE */
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put_bits(&s->pb, 1, 0); /* Continuous Presence Multipoint mode: off */
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if (format == 8) {
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/* Custom Picture Format (CPFMT) */
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s->aspect_ratio_info= ff_h263_aspect_to_info(s->avctx->sample_aspect_ratio);
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put_bits(&s->pb,4,s->aspect_ratio_info);
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put_bits(&s->pb,9,(s->width >> 2) - 1);
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put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */
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put_bits(&s->pb,9,(s->height >> 2));
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if (s->aspect_ratio_info == FF_ASPECT_EXTENDED){
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put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num);
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put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den);
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}
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}
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if(s->custom_pcf){
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if(ufep){
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put_bits(&s->pb, 1, best_clock_code);
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put_bits(&s->pb, 7, best_divisor);
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}
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put_sbits(&s->pb, 2, temp_ref>>8);
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}
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/* Unlimited Unrestricted Motion Vectors Indicator (UUI) */
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if (s->umvplus)
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// put_bits(&s->pb,1,1); /* Limited according tables of Annex D */
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//FIXME check actual requested range
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put_bits(&s->pb,2,1); /* unlimited */
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if(s->h263_slice_structured)
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put_bits(&s->pb,2,0); /* no weird submodes */
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put_bits(&s->pb, 5, s->qscale);
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}
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put_bits(&s->pb, 1, 0); /* no PEI */
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if(s->h263_slice_structured){
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put_bits(&s->pb, 1, 1);
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assert(s->mb_x == 0 && s->mb_y == 0);
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ff_h263_encode_mba(s);
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put_bits(&s->pb, 1, 1);
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}
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if(s->h263_aic){
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s->y_dc_scale_table=
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s->c_dc_scale_table= ff_aic_dc_scale_table;
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}else{
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s->y_dc_scale_table=
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s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
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}
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}
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/**
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* Encode a group of blocks header.
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*/
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void h263_encode_gob_header(MpegEncContext * s, int mb_line)
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{
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put_bits(&s->pb, 17, 1); /* GBSC */
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if(s->h263_slice_structured){
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put_bits(&s->pb, 1, 1);
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ff_h263_encode_mba(s);
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if(s->mb_num > 1583)
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put_bits(&s->pb, 1, 1);
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put_bits(&s->pb, 5, s->qscale); /* GQUANT */
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put_bits(&s->pb, 1, 1);
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put_bits(&s->pb, 2, s->pict_type == AV_PICTURE_TYPE_I); /* GFID */
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}else{
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int gob_number= mb_line / s->gob_index;
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put_bits(&s->pb, 5, gob_number); /* GN */
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put_bits(&s->pb, 2, s->pict_type == AV_PICTURE_TYPE_I); /* GFID */
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put_bits(&s->pb, 5, s->qscale); /* GQUANT */
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}
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}
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/**
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* modify qscale so that encoding is acually possible in h263 (limit difference to -2..2)
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*/
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void ff_clean_h263_qscales(MpegEncContext *s){
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int i;
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int8_t * const qscale_table = s->current_picture.f.qscale_table;
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ff_init_qscale_tab(s);
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for(i=1; i<s->mb_num; i++){
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if(qscale_table[ s->mb_index2xy[i] ] - qscale_table[ s->mb_index2xy[i-1] ] >2)
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qscale_table[ s->mb_index2xy[i] ]= qscale_table[ s->mb_index2xy[i-1] ]+2;
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}
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for(i=s->mb_num-2; i>=0; i--){
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if(qscale_table[ s->mb_index2xy[i] ] - qscale_table[ s->mb_index2xy[i+1] ] >2)
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qscale_table[ s->mb_index2xy[i] ]= qscale_table[ s->mb_index2xy[i+1] ]+2;
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}
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if(s->codec_id != CODEC_ID_H263P){
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for(i=1; i<s->mb_num; i++){
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int mb_xy= s->mb_index2xy[i];
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if(qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i-1]] && (s->mb_type[mb_xy]&CANDIDATE_MB_TYPE_INTER4V)){
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s->mb_type[mb_xy]|= CANDIDATE_MB_TYPE_INTER;
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}
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}
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}
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}
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static const int dquant_code[5]= {1,0,9,2,3};
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/**
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* Encode an 8x8 block.
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* @param block the 8x8 block
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* @param n block index (0-3 are luma, 4-5 are chroma)
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*/
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static void h263_encode_block(MpegEncContext * s, DCTELEM * block, int n)
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{
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int level, run, last, i, j, last_index, last_non_zero, sign, slevel, code;
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RLTable *rl;
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rl = &ff_h263_rl_inter;
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if (s->mb_intra && !s->h263_aic) {
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/* DC coef */
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level = block[0];
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/* 255 cannot be represented, so we clamp */
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if (level > 254) {
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level = 254;
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block[0] = 254;
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}
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/* 0 cannot be represented also */
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else if (level < 1) {
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level = 1;
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block[0] = 1;
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}
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if (level == 128) //FIXME check rv10
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put_bits(&s->pb, 8, 0xff);
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else
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put_bits(&s->pb, 8, level);
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i = 1;
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} else {
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i = 0;
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if (s->h263_aic && s->mb_intra)
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rl = &rl_intra_aic;
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if(s->alt_inter_vlc && !s->mb_intra){
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int aic_vlc_bits=0;
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int inter_vlc_bits=0;
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int wrong_pos=-1;
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int aic_code;
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last_index = s->block_last_index[n];
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last_non_zero = i - 1;
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for (; i <= last_index; i++) {
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j = s->intra_scantable.permutated[i];
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level = block[j];
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if (level) {
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run = i - last_non_zero - 1;
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last = (i == last_index);
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if(level<0) level= -level;
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code = get_rl_index(rl, last, run, level);
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aic_code = get_rl_index(&rl_intra_aic, last, run, level);
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inter_vlc_bits += rl->table_vlc[code][1]+1;
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aic_vlc_bits += rl_intra_aic.table_vlc[aic_code][1]+1;
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if (code == rl->n) {
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inter_vlc_bits += 1+6+8-1;
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}
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if (aic_code == rl_intra_aic.n) {
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aic_vlc_bits += 1+6+8-1;
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wrong_pos += run + 1;
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}else
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wrong_pos += wrong_run[aic_code];
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last_non_zero = i;
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}
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}
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i = 0;
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if(aic_vlc_bits < inter_vlc_bits && wrong_pos > 63)
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rl = &rl_intra_aic;
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}
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}
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/* AC coefs */
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last_index = s->block_last_index[n];
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last_non_zero = i - 1;
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for (; i <= last_index; i++) {
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j = s->intra_scantable.permutated[i];
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level = block[j];
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if (level) {
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run = i - last_non_zero - 1;
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last = (i == last_index);
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sign = 0;
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slevel = level;
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if (level < 0) {
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sign = 1;
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level = -level;
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}
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code = get_rl_index(rl, last, run, level);
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put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]);
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if (code == rl->n) {
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if(!CONFIG_FLV_ENCODER || s->h263_flv <= 1){
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put_bits(&s->pb, 1, last);
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put_bits(&s->pb, 6, run);
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assert(slevel != 0);
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if(level < 128)
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put_sbits(&s->pb, 8, slevel);
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else{
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put_bits(&s->pb, 8, 128);
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put_sbits(&s->pb, 5, slevel);
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put_sbits(&s->pb, 6, slevel>>5);
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}
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}else{
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ff_flv2_encode_ac_esc(&s->pb, slevel, level, run, last);
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}
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} else {
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put_bits(&s->pb, 1, sign);
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}
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last_non_zero = i;
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}
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}
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}
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/* Encode MV differences on H.263+ with Unrestricted MV mode */
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static void h263p_encode_umotion(MpegEncContext * s, int val)
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{
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short sval = 0;
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short i = 0;
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short n_bits = 0;
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short temp_val;
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int code = 0;
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int tcode;
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if ( val == 0)
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put_bits(&s->pb, 1, 1);
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else if (val == 1)
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put_bits(&s->pb, 3, 0);
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else if (val == -1)
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put_bits(&s->pb, 3, 2);
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else {
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sval = ((val < 0) ? (short)(-val):(short)val);
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temp_val = sval;
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while (temp_val != 0) {
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temp_val = temp_val >> 1;
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n_bits++;
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}
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i = n_bits - 1;
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|
while (i > 0) {
|
|
tcode = (sval & (1 << (i-1))) >> (i-1);
|
|
tcode = (tcode << 1) | 1;
|
|
code = (code << 2) | tcode;
|
|
i--;
|
|
}
|
|
code = ((code << 1) | (val < 0)) << 1;
|
|
put_bits(&s->pb, (2*n_bits)+1, code);
|
|
}
|
|
}
|
|
|
|
void h263_encode_mb(MpegEncContext * s,
|
|
DCTELEM block[6][64],
|
|
int motion_x, int motion_y)
|
|
{
|
|
int cbpc, cbpy, i, cbp, pred_x, pred_y;
|
|
int16_t pred_dc;
|
|
int16_t rec_intradc[6];
|
|
int16_t *dc_ptr[6];
|
|
const int interleaved_stats= (s->flags&CODEC_FLAG_PASS1);
|
|
|
|
if (!s->mb_intra) {
|
|
/* compute cbp */
|
|
cbp= get_p_cbp(s, block, motion_x, motion_y);
|
|
|
|
if ((cbp | motion_x | motion_y | s->dquant | (s->mv_type - MV_TYPE_16X16)) == 0) {
|
|
/* skip macroblock */
|
|
put_bits(&s->pb, 1, 1);
|
|
if(interleaved_stats){
|
|
s->misc_bits++;
|
|
s->last_bits++;
|
|
}
|
|
s->skip_count++;
|
|
|
|
return;
|
|
}
|
|
put_bits(&s->pb, 1, 0); /* mb coded */
|
|
|
|
cbpc = cbp & 3;
|
|
cbpy = cbp >> 2;
|
|
if(s->alt_inter_vlc==0 || cbpc!=3)
|
|
cbpy ^= 0xF;
|
|
if(s->dquant) cbpc+= 8;
|
|
if(s->mv_type==MV_TYPE_16X16){
|
|
put_bits(&s->pb,
|
|
ff_h263_inter_MCBPC_bits[cbpc],
|
|
ff_h263_inter_MCBPC_code[cbpc]);
|
|
|
|
put_bits(&s->pb, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
|
|
if(s->dquant)
|
|
put_bits(&s->pb, 2, dquant_code[s->dquant+2]);
|
|
|
|
if(interleaved_stats){
|
|
s->misc_bits+= get_bits_diff(s);
|
|
}
|
|
|
|
/* motion vectors: 16x16 mode */
|
|
h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
|
|
|
|
if (!s->umvplus) {
|
|
ff_h263_encode_motion_vector(s, motion_x - pred_x,
|
|
motion_y - pred_y, 1);
|
|
}
|
|
else {
|
|
h263p_encode_umotion(s, motion_x - pred_x);
|
|
h263p_encode_umotion(s, motion_y - pred_y);
|
|
if (((motion_x - pred_x) == 1) && ((motion_y - pred_y) == 1))
|
|
/* To prevent Start Code emulation */
|
|
put_bits(&s->pb,1,1);
|
|
}
|
|
}else{
|
|
put_bits(&s->pb,
|
|
ff_h263_inter_MCBPC_bits[cbpc+16],
|
|
ff_h263_inter_MCBPC_code[cbpc+16]);
|
|
put_bits(&s->pb, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
|
|
if(s->dquant)
|
|
put_bits(&s->pb, 2, dquant_code[s->dquant+2]);
|
|
|
|
if(interleaved_stats){
|
|
s->misc_bits+= get_bits_diff(s);
|
|
}
|
|
|
|
for(i=0; i<4; i++){
|
|
/* motion vectors: 8x8 mode*/
|
|
h263_pred_motion(s, i, 0, &pred_x, &pred_y);
|
|
|
|
motion_x = s->current_picture.f.motion_val[0][s->block_index[i]][0];
|
|
motion_y = s->current_picture.f.motion_val[0][s->block_index[i]][1];
|
|
if (!s->umvplus) {
|
|
ff_h263_encode_motion_vector(s, motion_x - pred_x,
|
|
motion_y - pred_y, 1);
|
|
}
|
|
else {
|
|
h263p_encode_umotion(s, motion_x - pred_x);
|
|
h263p_encode_umotion(s, motion_y - pred_y);
|
|
if (((motion_x - pred_x) == 1) && ((motion_y - pred_y) == 1))
|
|
/* To prevent Start Code emulation */
|
|
put_bits(&s->pb,1,1);
|
|
}
|
|
}
|
|
}
|
|
|
|
if(interleaved_stats){
|
|
s->mv_bits+= get_bits_diff(s);
|
|
}
|
|
} else {
|
|
assert(s->mb_intra);
|
|
|
|
cbp = 0;
|
|
if (s->h263_aic) {
|
|
/* Predict DC */
|
|
for(i=0; i<6; i++) {
|
|
int16_t level = block[i][0];
|
|
int scale;
|
|
|
|
if(i<4) scale= s->y_dc_scale;
|
|
else scale= s->c_dc_scale;
|
|
|
|
pred_dc = h263_pred_dc(s, i, &dc_ptr[i]);
|
|
level -= pred_dc;
|
|
/* Quant */
|
|
if (level >= 0)
|
|
level = (level + (scale>>1))/scale;
|
|
else
|
|
level = (level - (scale>>1))/scale;
|
|
|
|
/* AIC can change CBP */
|
|
if (level == 0 && s->block_last_index[i] == 0)
|
|
s->block_last_index[i] = -1;
|
|
|
|
if(!s->modified_quant){
|
|
if (level < -127)
|
|
level = -127;
|
|
else if (level > 127)
|
|
level = 127;
|
|
}
|
|
|
|
block[i][0] = level;
|
|
/* Reconstruction */
|
|
rec_intradc[i] = scale*level + pred_dc;
|
|
/* Oddify */
|
|
rec_intradc[i] |= 1;
|
|
//if ((rec_intradc[i] % 2) == 0)
|
|
// rec_intradc[i]++;
|
|
/* Clipping */
|
|
if (rec_intradc[i] < 0)
|
|
rec_intradc[i] = 0;
|
|
else if (rec_intradc[i] > 2047)
|
|
rec_intradc[i] = 2047;
|
|
|
|
/* Update AC/DC tables */
|
|
*dc_ptr[i] = rec_intradc[i];
|
|
if (s->block_last_index[i] >= 0)
|
|
cbp |= 1 << (5 - i);
|
|
}
|
|
}else{
|
|
for(i=0; i<6; i++) {
|
|
/* compute cbp */
|
|
if (s->block_last_index[i] >= 1)
|
|
cbp |= 1 << (5 - i);
|
|
}
|
|
}
|
|
|
|
cbpc = cbp & 3;
|
|
if (s->pict_type == AV_PICTURE_TYPE_I) {
|
|
if(s->dquant) cbpc+=4;
|
|
put_bits(&s->pb,
|
|
ff_h263_intra_MCBPC_bits[cbpc],
|
|
ff_h263_intra_MCBPC_code[cbpc]);
|
|
} else {
|
|
if(s->dquant) cbpc+=8;
|
|
put_bits(&s->pb, 1, 0); /* mb coded */
|
|
put_bits(&s->pb,
|
|
ff_h263_inter_MCBPC_bits[cbpc + 4],
|
|
ff_h263_inter_MCBPC_code[cbpc + 4]);
|
|
}
|
|
if (s->h263_aic) {
|
|
/* XXX: currently, we do not try to use ac prediction */
|
|
put_bits(&s->pb, 1, 0); /* no AC prediction */
|
|
}
|
|
cbpy = cbp >> 2;
|
|
put_bits(&s->pb, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]);
|
|
if(s->dquant)
|
|
put_bits(&s->pb, 2, dquant_code[s->dquant+2]);
|
|
|
|
if(interleaved_stats){
|
|
s->misc_bits+= get_bits_diff(s);
|
|
}
|
|
}
|
|
|
|
for(i=0; i<6; i++) {
|
|
/* encode each block */
|
|
h263_encode_block(s, block[i], i);
|
|
|
|
/* Update INTRADC for decoding */
|
|
if (s->h263_aic && s->mb_intra) {
|
|
block[i][0] = rec_intradc[i];
|
|
|
|
}
|
|
}
|
|
|
|
if(interleaved_stats){
|
|
if (!s->mb_intra) {
|
|
s->p_tex_bits+= get_bits_diff(s);
|
|
s->f_count++;
|
|
}else{
|
|
s->i_tex_bits+= get_bits_diff(s);
|
|
s->i_count++;
|
|
}
|
|
}
|
|
}
|
|
|
|
void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code)
|
|
{
|
|
int range, bit_size, sign, code, bits;
|
|
|
|
if (val == 0) {
|
|
/* zero vector */
|
|
code = 0;
|
|
put_bits(&s->pb, mvtab[code][1], mvtab[code][0]);
|
|
} else {
|
|
bit_size = f_code - 1;
|
|
range = 1 << bit_size;
|
|
/* modulo encoding */
|
|
val = sign_extend(val, 6 + bit_size);
|
|
sign = val>>31;
|
|
val= (val^sign)-sign;
|
|
sign&=1;
|
|
|
|
val--;
|
|
code = (val >> bit_size) + 1;
|
|
bits = val & (range - 1);
|
|
|
|
put_bits(&s->pb, mvtab[code][1] + 1, (mvtab[code][0] << 1) | sign);
|
|
if (bit_size > 0) {
|
|
put_bits(&s->pb, bit_size, bits);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void init_mv_penalty_and_fcode(MpegEncContext *s)
|
|
{
|
|
int f_code;
|
|
int mv;
|
|
|
|
for(f_code=1; f_code<=MAX_FCODE; f_code++){
|
|
for(mv=-MAX_MV; mv<=MAX_MV; mv++){
|
|
int len;
|
|
|
|
if(mv==0) len= mvtab[0][1];
|
|
else{
|
|
int val, bit_size, code;
|
|
|
|
bit_size = f_code - 1;
|
|
|
|
val=mv;
|
|
if (val < 0)
|
|
val = -val;
|
|
val--;
|
|
code = (val >> bit_size) + 1;
|
|
if(code<33){
|
|
len= mvtab[code][1] + 1 + bit_size;
|
|
}else{
|
|
len= mvtab[32][1] + av_log2(code>>5) + 2 + bit_size;
|
|
}
|
|
}
|
|
|
|
mv_penalty[f_code][mv+MAX_MV]= len;
|
|
}
|
|
}
|
|
|
|
for(f_code=MAX_FCODE; f_code>0; f_code--){
|
|
for(mv=-(16<<f_code); mv<(16<<f_code); mv++){
|
|
fcode_tab[mv+MAX_MV]= f_code;
|
|
}
|
|
}
|
|
|
|
for(mv=0; mv<MAX_MV*2+1; mv++){
|
|
umv_fcode_tab[mv]= 1;
|
|
}
|
|
}
|
|
|
|
static void init_uni_h263_rl_tab(RLTable *rl, uint32_t *bits_tab, uint8_t *len_tab){
|
|
int slevel, run, last;
|
|
|
|
assert(MAX_LEVEL >= 64);
|
|
assert(MAX_RUN >= 63);
|
|
|
|
for(slevel=-64; slevel<64; slevel++){
|
|
if(slevel==0) continue;
|
|
for(run=0; run<64; run++){
|
|
for(last=0; last<=1; last++){
|
|
const int index= UNI_MPEG4_ENC_INDEX(last, run, slevel+64);
|
|
int level= slevel < 0 ? -slevel : slevel;
|
|
int sign= slevel < 0 ? 1 : 0;
|
|
int bits, len, code;
|
|
|
|
len_tab[index]= 100;
|
|
|
|
/* ESC0 */
|
|
code= get_rl_index(rl, last, run, level);
|
|
bits= rl->table_vlc[code][0];
|
|
len= rl->table_vlc[code][1];
|
|
bits=bits*2+sign; len++;
|
|
|
|
if(code!=rl->n && len < len_tab[index]){
|
|
if(bits_tab) bits_tab[index]= bits;
|
|
len_tab [index]= len;
|
|
}
|
|
/* ESC */
|
|
bits= rl->table_vlc[rl->n][0];
|
|
len = rl->table_vlc[rl->n][1];
|
|
bits=bits*2+last; len++;
|
|
bits=bits*64+run; len+=6;
|
|
bits=bits*256+(level&0xff); len+=8;
|
|
|
|
if(len < len_tab[index]){
|
|
if(bits_tab) bits_tab[index]= bits;
|
|
len_tab [index]= len;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void h263_encode_init(MpegEncContext *s)
|
|
{
|
|
static int done = 0;
|
|
|
|
if (!done) {
|
|
done = 1;
|
|
|
|
init_rl(&ff_h263_rl_inter, ff_h263_static_rl_table_store[0]);
|
|
init_rl(&rl_intra_aic, ff_h263_static_rl_table_store[1]);
|
|
|
|
init_uni_h263_rl_tab(&rl_intra_aic, NULL, uni_h263_intra_aic_rl_len);
|
|
init_uni_h263_rl_tab(&ff_h263_rl_inter , NULL, uni_h263_inter_rl_len);
|
|
|
|
init_mv_penalty_and_fcode(s);
|
|
}
|
|
s->me.mv_penalty= mv_penalty; //FIXME exact table for msmpeg4 & h263p
|
|
|
|
s->intra_ac_vlc_length =s->inter_ac_vlc_length = uni_h263_inter_rl_len;
|
|
s->intra_ac_vlc_last_length=s->inter_ac_vlc_last_length= uni_h263_inter_rl_len + 128*64;
|
|
if(s->h263_aic){
|
|
s->intra_ac_vlc_length = uni_h263_intra_aic_rl_len;
|
|
s->intra_ac_vlc_last_length= uni_h263_intra_aic_rl_len + 128*64;
|
|
}
|
|
s->ac_esc_length= 7+1+6+8;
|
|
|
|
// use fcodes >1 only for mpeg4 & h263 & h263p FIXME
|
|
switch(s->codec_id){
|
|
case CODEC_ID_MPEG4:
|
|
s->fcode_tab= fcode_tab;
|
|
break;
|
|
case CODEC_ID_H263P:
|
|
if(s->umvplus)
|
|
s->fcode_tab= umv_fcode_tab;
|
|
if(s->modified_quant){
|
|
s->min_qcoeff= -2047;
|
|
s->max_qcoeff= 2047;
|
|
}else{
|
|
s->min_qcoeff= -127;
|
|
s->max_qcoeff= 127;
|
|
}
|
|
break;
|
|
//Note for mpeg4 & h263 the dc-scale table will be set per frame as needed later
|
|
case CODEC_ID_FLV1:
|
|
if (s->h263_flv > 1) {
|
|
s->min_qcoeff= -1023;
|
|
s->max_qcoeff= 1023;
|
|
} else {
|
|
s->min_qcoeff= -127;
|
|
s->max_qcoeff= 127;
|
|
}
|
|
s->y_dc_scale_table=
|
|
s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
|
|
break;
|
|
default: //nothing needed - default table already set in mpegvideo.c
|
|
s->min_qcoeff= -127;
|
|
s->max_qcoeff= 127;
|
|
s->y_dc_scale_table=
|
|
s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
|
|
}
|
|
}
|
|
|
|
void ff_h263_encode_mba(MpegEncContext *s)
|
|
{
|
|
int i, mb_pos;
|
|
|
|
for(i=0; i<6; i++){
|
|
if(s->mb_num-1 <= ff_mba_max[i]) break;
|
|
}
|
|
mb_pos= s->mb_x + s->mb_width*s->mb_y;
|
|
put_bits(&s->pb, ff_mba_length[i], mb_pos);
|
|
}
|