ffmpeg / libavcodec / ituh263enc.c @ ce5e49b0
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/*
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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 FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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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.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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|
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static const int dquant_code[5]= {1,0,9,2,3}; |
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/**
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* encodes a 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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|
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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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|
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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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|
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assert(slevel != 0);
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|
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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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} |
| 417 |
} |
| 418 |
|
| 419 |
/* Encode MV differences on H.263+ with Unrestricted MV mode */
|
| 420 |
static void h263p_encode_umotion(MpegEncContext * s, int val) |
| 421 |
{
|
| 422 |
short sval = 0; |
| 423 |
short i = 0; |
| 424 |
short n_bits = 0; |
| 425 |
short temp_val;
|
| 426 |
int code = 0; |
| 427 |
int tcode;
|
| 428 |
|
| 429 |
if ( val == 0) |
| 430 |
put_bits(&s->pb, 1, 1); |
| 431 |
else if (val == 1) |
| 432 |
put_bits(&s->pb, 3, 0); |
| 433 |
else if (val == -1) |
| 434 |
put_bits(&s->pb, 3, 2); |
| 435 |
else {
|
| 436 |
|
| 437 |
sval = ((val < 0) ? (short)(-val):(short)val); |
| 438 |
temp_val = sval; |
| 439 |
|
| 440 |
while (temp_val != 0) { |
| 441 |
temp_val = temp_val >> 1;
|
| 442 |
n_bits++; |
| 443 |
} |
| 444 |
|
| 445 |
i = n_bits - 1;
|
| 446 |
while (i > 0) { |
| 447 |
tcode = (sval & (1 << (i-1))) >> (i-1); |
| 448 |
tcode = (tcode << 1) | 1; |
| 449 |
code = (code << 2) | tcode;
|
| 450 |
i--; |
| 451 |
} |
| 452 |
code = ((code << 1) | (val < 0)) << 1; |
| 453 |
put_bits(&s->pb, (2*n_bits)+1, code); |
| 454 |
} |
| 455 |
} |
| 456 |
|
| 457 |
void h263_encode_mb(MpegEncContext * s,
|
| 458 |
DCTELEM block[6][64], |
| 459 |
int motion_x, int motion_y) |
| 460 |
{
|
| 461 |
int cbpc, cbpy, i, cbp, pred_x, pred_y;
|
| 462 |
int16_t pred_dc; |
| 463 |
int16_t rec_intradc[6];
|
| 464 |
int16_t *dc_ptr[6];
|
| 465 |
const int interleaved_stats= (s->flags&CODEC_FLAG_PASS1); |
| 466 |
|
| 467 |
if (!s->mb_intra) {
|
| 468 |
/* compute cbp */
|
| 469 |
cbp= get_p_cbp(s, block, motion_x, motion_y); |
| 470 |
|
| 471 |
if ((cbp | motion_x | motion_y | s->dquant | (s->mv_type - MV_TYPE_16X16)) == 0) { |
| 472 |
/* skip macroblock */
|
| 473 |
put_bits(&s->pb, 1, 1); |
| 474 |
if(interleaved_stats){
|
| 475 |
s->misc_bits++; |
| 476 |
s->last_bits++; |
| 477 |
} |
| 478 |
s->skip_count++; |
| 479 |
|
| 480 |
return;
|
| 481 |
} |
| 482 |
put_bits(&s->pb, 1, 0); /* mb coded */ |
| 483 |
|
| 484 |
cbpc = cbp & 3;
|
| 485 |
cbpy = cbp >> 2;
|
| 486 |
if(s->alt_inter_vlc==0 || cbpc!=3) |
| 487 |
cbpy ^= 0xF;
|
| 488 |
if(s->dquant) cbpc+= 8; |
| 489 |
if(s->mv_type==MV_TYPE_16X16){
|
| 490 |
put_bits(&s->pb, |
| 491 |
ff_h263_inter_MCBPC_bits[cbpc], |
| 492 |
ff_h263_inter_MCBPC_code[cbpc]); |
| 493 |
|
| 494 |
put_bits(&s->pb, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); |
| 495 |
if(s->dquant)
|
| 496 |
put_bits(&s->pb, 2, dquant_code[s->dquant+2]); |
| 497 |
|
| 498 |
if(interleaved_stats){
|
| 499 |
s->misc_bits+= get_bits_diff(s); |
| 500 |
} |
| 501 |
|
| 502 |
/* motion vectors: 16x16 mode */
|
| 503 |
h263_pred_motion(s, 0, 0, &pred_x, &pred_y); |
| 504 |
|
| 505 |
if (!s->umvplus) {
|
| 506 |
ff_h263_encode_motion_vector(s, motion_x - pred_x, |
| 507 |
motion_y - pred_y, 1);
|
| 508 |
} |
| 509 |
else {
|
| 510 |
h263p_encode_umotion(s, motion_x - pred_x); |
| 511 |
h263p_encode_umotion(s, motion_y - pred_y); |
| 512 |
if (((motion_x - pred_x) == 1) && ((motion_y - pred_y) == 1)) |
| 513 |
/* To prevent Start Code emulation */
|
| 514 |
put_bits(&s->pb,1,1); |
| 515 |
} |
| 516 |
}else{
|
| 517 |
put_bits(&s->pb, |
| 518 |
ff_h263_inter_MCBPC_bits[cbpc+16],
|
| 519 |
ff_h263_inter_MCBPC_code[cbpc+16]);
|
| 520 |
put_bits(&s->pb, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); |
| 521 |
if(s->dquant)
|
| 522 |
put_bits(&s->pb, 2, dquant_code[s->dquant+2]); |
| 523 |
|
| 524 |
if(interleaved_stats){
|
| 525 |
s->misc_bits+= get_bits_diff(s); |
| 526 |
} |
| 527 |
|
| 528 |
for(i=0; i<4; i++){ |
| 529 |
/* motion vectors: 8x8 mode*/
|
| 530 |
h263_pred_motion(s, i, 0, &pred_x, &pred_y);
|
| 531 |
|
| 532 |
motion_x= s->current_picture.motion_val[0][ s->block_index[i] ][0]; |
| 533 |
motion_y= s->current_picture.motion_val[0][ s->block_index[i] ][1]; |
| 534 |
if (!s->umvplus) {
|
| 535 |
ff_h263_encode_motion_vector(s, motion_x - pred_x, |
| 536 |
motion_y - pred_y, 1);
|
| 537 |
} |
| 538 |
else {
|
| 539 |
h263p_encode_umotion(s, motion_x - pred_x); |
| 540 |
h263p_encode_umotion(s, motion_y - pred_y); |
| 541 |
if (((motion_x - pred_x) == 1) && ((motion_y - pred_y) == 1)) |
| 542 |
/* To prevent Start Code emulation */
|
| 543 |
put_bits(&s->pb,1,1); |
| 544 |
} |
| 545 |
} |
| 546 |
} |
| 547 |
|
| 548 |
if(interleaved_stats){
|
| 549 |
s->mv_bits+= get_bits_diff(s); |
| 550 |
} |
| 551 |
} else {
|
| 552 |
assert(s->mb_intra); |
| 553 |
|
| 554 |
cbp = 0;
|
| 555 |
if (s->h263_aic) {
|
| 556 |
/* Predict DC */
|
| 557 |
for(i=0; i<6; i++) { |
| 558 |
int16_t level = block[i][0];
|
| 559 |
int scale;
|
| 560 |
|
| 561 |
if(i<4) scale= s->y_dc_scale; |
| 562 |
else scale= s->c_dc_scale;
|
| 563 |
|
| 564 |
pred_dc = h263_pred_dc(s, i, &dc_ptr[i]); |
| 565 |
level -= pred_dc; |
| 566 |
/* Quant */
|
| 567 |
if (level >= 0) |
| 568 |
level = (level + (scale>>1))/scale;
|
| 569 |
else
|
| 570 |
level = (level - (scale>>1))/scale;
|
| 571 |
|
| 572 |
/* AIC can change CBP */
|
| 573 |
if (level == 0 && s->block_last_index[i] == 0) |
| 574 |
s->block_last_index[i] = -1;
|
| 575 |
|
| 576 |
if(!s->modified_quant){
|
| 577 |
if (level < -127) |
| 578 |
level = -127;
|
| 579 |
else if (level > 127) |
| 580 |
level = 127;
|
| 581 |
} |
| 582 |
|
| 583 |
block[i][0] = level;
|
| 584 |
/* Reconstruction */
|
| 585 |
rec_intradc[i] = scale*level + pred_dc; |
| 586 |
/* Oddify */
|
| 587 |
rec_intradc[i] |= 1;
|
| 588 |
//if ((rec_intradc[i] % 2) == 0)
|
| 589 |
// rec_intradc[i]++;
|
| 590 |
/* Clipping */
|
| 591 |
if (rec_intradc[i] < 0) |
| 592 |
rec_intradc[i] = 0;
|
| 593 |
else if (rec_intradc[i] > 2047) |
| 594 |
rec_intradc[i] = 2047;
|
| 595 |
|
| 596 |
/* Update AC/DC tables */
|
| 597 |
*dc_ptr[i] = rec_intradc[i]; |
| 598 |
if (s->block_last_index[i] >= 0) |
| 599 |
cbp |= 1 << (5 - i); |
| 600 |
} |
| 601 |
}else{
|
| 602 |
for(i=0; i<6; i++) { |
| 603 |
/* compute cbp */
|
| 604 |
if (s->block_last_index[i] >= 1) |
| 605 |
cbp |= 1 << (5 - i); |
| 606 |
} |
| 607 |
} |
| 608 |
|
| 609 |
cbpc = cbp & 3;
|
| 610 |
if (s->pict_type == AV_PICTURE_TYPE_I) {
|
| 611 |
if(s->dquant) cbpc+=4; |
| 612 |
put_bits(&s->pb, |
| 613 |
ff_h263_intra_MCBPC_bits[cbpc], |
| 614 |
ff_h263_intra_MCBPC_code[cbpc]); |
| 615 |
} else {
|
| 616 |
if(s->dquant) cbpc+=8; |
| 617 |
put_bits(&s->pb, 1, 0); /* mb coded */ |
| 618 |
put_bits(&s->pb, |
| 619 |
ff_h263_inter_MCBPC_bits[cbpc + 4],
|
| 620 |
ff_h263_inter_MCBPC_code[cbpc + 4]);
|
| 621 |
} |
| 622 |
if (s->h263_aic) {
|
| 623 |
/* XXX: currently, we do not try to use ac prediction */
|
| 624 |
put_bits(&s->pb, 1, 0); /* no AC prediction */ |
| 625 |
} |
| 626 |
cbpy = cbp >> 2;
|
| 627 |
put_bits(&s->pb, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); |
| 628 |
if(s->dquant)
|
| 629 |
put_bits(&s->pb, 2, dquant_code[s->dquant+2]); |
| 630 |
|
| 631 |
if(interleaved_stats){
|
| 632 |
s->misc_bits+= get_bits_diff(s); |
| 633 |
} |
| 634 |
} |
| 635 |
|
| 636 |
for(i=0; i<6; i++) { |
| 637 |
/* encode each block */
|
| 638 |
h263_encode_block(s, block[i], i); |
| 639 |
|
| 640 |
/* Update INTRADC for decoding */
|
| 641 |
if (s->h263_aic && s->mb_intra) {
|
| 642 |
block[i][0] = rec_intradc[i];
|
| 643 |
|
| 644 |
} |
| 645 |
} |
| 646 |
|
| 647 |
if(interleaved_stats){
|
| 648 |
if (!s->mb_intra) {
|
| 649 |
s->p_tex_bits+= get_bits_diff(s); |
| 650 |
s->f_count++; |
| 651 |
}else{
|
| 652 |
s->i_tex_bits+= get_bits_diff(s); |
| 653 |
s->i_count++; |
| 654 |
} |
| 655 |
} |
| 656 |
} |
| 657 |
|
| 658 |
void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code) |
| 659 |
{
|
| 660 |
int range, l, bit_size, sign, code, bits;
|
| 661 |
|
| 662 |
if (val == 0) { |
| 663 |
/* zero vector */
|
| 664 |
code = 0;
|
| 665 |
put_bits(&s->pb, mvtab[code][1], mvtab[code][0]); |
| 666 |
} else {
|
| 667 |
bit_size = f_code - 1;
|
| 668 |
range = 1 << bit_size;
|
| 669 |
/* modulo encoding */
|
| 670 |
l= INT_BIT - 6 - bit_size;
|
| 671 |
val = (val<<l)>>l; |
| 672 |
sign = val>>31;
|
| 673 |
val= (val^sign)-sign; |
| 674 |
sign&=1;
|
| 675 |
|
| 676 |
val--; |
| 677 |
code = (val >> bit_size) + 1;
|
| 678 |
bits = val & (range - 1);
|
| 679 |
|
| 680 |
put_bits(&s->pb, mvtab[code][1] + 1, (mvtab[code][0] << 1) | sign); |
| 681 |
if (bit_size > 0) { |
| 682 |
put_bits(&s->pb, bit_size, bits); |
| 683 |
} |
| 684 |
} |
| 685 |
} |
| 686 |
|
| 687 |
static void init_mv_penalty_and_fcode(MpegEncContext *s) |
| 688 |
{
|
| 689 |
int f_code;
|
| 690 |
int mv;
|
| 691 |
|
| 692 |
for(f_code=1; f_code<=MAX_FCODE; f_code++){ |
| 693 |
for(mv=-MAX_MV; mv<=MAX_MV; mv++){
|
| 694 |
int len;
|
| 695 |
|
| 696 |
if(mv==0) len= mvtab[0][1]; |
| 697 |
else{
|
| 698 |
int val, bit_size, code;
|
| 699 |
|
| 700 |
bit_size = f_code - 1;
|
| 701 |
|
| 702 |
val=mv; |
| 703 |
if (val < 0) |
| 704 |
val = -val; |
| 705 |
val--; |
| 706 |
code = (val >> bit_size) + 1;
|
| 707 |
if(code<33){ |
| 708 |
len= mvtab[code][1] + 1 + bit_size; |
| 709 |
}else{
|
| 710 |
len= mvtab[32][1] + av_log2(code>>5) + 2 + bit_size; |
| 711 |
} |
| 712 |
} |
| 713 |
|
| 714 |
mv_penalty[f_code][mv+MAX_MV]= len; |
| 715 |
} |
| 716 |
} |
| 717 |
|
| 718 |
for(f_code=MAX_FCODE; f_code>0; f_code--){ |
| 719 |
for(mv=-(16<<f_code); mv<(16<<f_code); mv++){ |
| 720 |
fcode_tab[mv+MAX_MV]= f_code; |
| 721 |
} |
| 722 |
} |
| 723 |
|
| 724 |
for(mv=0; mv<MAX_MV*2+1; mv++){ |
| 725 |
umv_fcode_tab[mv]= 1;
|
| 726 |
} |
| 727 |
} |
| 728 |
|
| 729 |
static void init_uni_h263_rl_tab(RLTable *rl, uint32_t *bits_tab, uint8_t *len_tab){ |
| 730 |
int slevel, run, last;
|
| 731 |
|
| 732 |
assert(MAX_LEVEL >= 64);
|
| 733 |
assert(MAX_RUN >= 63);
|
| 734 |
|
| 735 |
for(slevel=-64; slevel<64; slevel++){ |
| 736 |
if(slevel==0) continue; |
| 737 |
for(run=0; run<64; run++){ |
| 738 |
for(last=0; last<=1; last++){ |
| 739 |
const int index= UNI_MPEG4_ENC_INDEX(last, run, slevel+64); |
| 740 |
int level= slevel < 0 ? -slevel : slevel; |
| 741 |
int sign= slevel < 0 ? 1 : 0; |
| 742 |
int bits, len, code;
|
| 743 |
|
| 744 |
len_tab[index]= 100;
|
| 745 |
|
| 746 |
/* ESC0 */
|
| 747 |
code= get_rl_index(rl, last, run, level); |
| 748 |
bits= rl->table_vlc[code][0];
|
| 749 |
len= rl->table_vlc[code][1];
|
| 750 |
bits=bits*2+sign; len++;
|
| 751 |
|
| 752 |
if(code!=rl->n && len < len_tab[index]){
|
| 753 |
if(bits_tab) bits_tab[index]= bits;
|
| 754 |
len_tab [index]= len; |
| 755 |
} |
| 756 |
/* ESC */
|
| 757 |
bits= rl->table_vlc[rl->n][0];
|
| 758 |
len = rl->table_vlc[rl->n][1];
|
| 759 |
bits=bits*2+last; len++;
|
| 760 |
bits=bits*64+run; len+=6; |
| 761 |
bits=bits*256+(level&0xff); len+=8; |
| 762 |
|
| 763 |
if(len < len_tab[index]){
|
| 764 |
if(bits_tab) bits_tab[index]= bits;
|
| 765 |
len_tab [index]= len; |
| 766 |
} |
| 767 |
} |
| 768 |
} |
| 769 |
} |
| 770 |
} |
| 771 |
|
| 772 |
void h263_encode_init(MpegEncContext *s)
|
| 773 |
{
|
| 774 |
static int done = 0; |
| 775 |
|
| 776 |
if (!done) {
|
| 777 |
done = 1;
|
| 778 |
|
| 779 |
init_rl(&ff_h263_rl_inter, ff_h263_static_rl_table_store[0]);
|
| 780 |
init_rl(&rl_intra_aic, ff_h263_static_rl_table_store[1]);
|
| 781 |
|
| 782 |
init_uni_h263_rl_tab(&rl_intra_aic, NULL, uni_h263_intra_aic_rl_len);
|
| 783 |
init_uni_h263_rl_tab(&ff_h263_rl_inter , NULL, uni_h263_inter_rl_len);
|
| 784 |
|
| 785 |
init_mv_penalty_and_fcode(s); |
| 786 |
} |
| 787 |
s->me.mv_penalty= mv_penalty; //FIXME exact table for msmpeg4 & h263p
|
| 788 |
|
| 789 |
s->intra_ac_vlc_length =s->inter_ac_vlc_length = uni_h263_inter_rl_len; |
| 790 |
s->intra_ac_vlc_last_length=s->inter_ac_vlc_last_length= uni_h263_inter_rl_len + 128*64; |
| 791 |
if(s->h263_aic){
|
| 792 |
s->intra_ac_vlc_length = uni_h263_intra_aic_rl_len; |
| 793 |
s->intra_ac_vlc_last_length= uni_h263_intra_aic_rl_len + 128*64; |
| 794 |
} |
| 795 |
s->ac_esc_length= 7+1+6+8; |
| 796 |
|
| 797 |
// use fcodes >1 only for mpeg4 & h263 & h263p FIXME
|
| 798 |
switch(s->codec_id){
|
| 799 |
case CODEC_ID_MPEG4:
|
| 800 |
s->fcode_tab= fcode_tab; |
| 801 |
break;
|
| 802 |
case CODEC_ID_H263P:
|
| 803 |
if(s->umvplus)
|
| 804 |
s->fcode_tab= umv_fcode_tab; |
| 805 |
if(s->modified_quant){
|
| 806 |
s->min_qcoeff= -2047;
|
| 807 |
s->max_qcoeff= 2047;
|
| 808 |
}else{
|
| 809 |
s->min_qcoeff= -127;
|
| 810 |
s->max_qcoeff= 127;
|
| 811 |
} |
| 812 |
break;
|
| 813 |
//Note for mpeg4 & h263 the dc-scale table will be set per frame as needed later
|
| 814 |
case CODEC_ID_FLV1:
|
| 815 |
if (s->h263_flv > 1) { |
| 816 |
s->min_qcoeff= -1023;
|
| 817 |
s->max_qcoeff= 1023;
|
| 818 |
} else {
|
| 819 |
s->min_qcoeff= -127;
|
| 820 |
s->max_qcoeff= 127;
|
| 821 |
} |
| 822 |
s->y_dc_scale_table= |
| 823 |
s->c_dc_scale_table= ff_mpeg1_dc_scale_table; |
| 824 |
break;
|
| 825 |
default: //nothing needed - default table already set in mpegvideo.c |
| 826 |
s->min_qcoeff= -127;
|
| 827 |
s->max_qcoeff= 127;
|
| 828 |
s->y_dc_scale_table= |
| 829 |
s->c_dc_scale_table= ff_mpeg1_dc_scale_table; |
| 830 |
} |
| 831 |
} |
| 832 |
|
| 833 |
void ff_h263_encode_mba(MpegEncContext *s)
|
| 834 |
{
|
| 835 |
int i, mb_pos;
|
| 836 |
|
| 837 |
for(i=0; i<6; i++){ |
| 838 |
if(s->mb_num-1 <= ff_mba_max[i]) break; |
| 839 |
} |
| 840 |
mb_pos= s->mb_x + s->mb_width*s->mb_y; |
| 841 |
put_bits(&s->pb, ff_mba_length[i], mb_pos); |
| 842 |
} |