mirror of https://github.com/FFmpeg/FFmpeg.git
Originally committed as revision 21109 to svn://svn.ffmpeg.org/ffmpeg/trunkrelease/0.6
Michael Niedermayer
15 years ago
parent
4b19045566
commit
fc53b6afee
15 changed files with 2076 additions and 1990 deletions
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@ -0,0 +1,857 @@ |
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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 libavcodec/ituh263enc.c |
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* h263 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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//#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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int h263_get_picture_format(int width, int height) |
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{ |
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if (width == 128 && height == 96) |
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return 1; |
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else if (width == 176 && height == 144) |
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return 2; |
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else if (width == 352 && height == 288) |
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return 3; |
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else if (width == 704 && height == 576) |
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return 4; |
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else if (width == 1408 && height == 1152) |
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return 5; |
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else |
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return 7; |
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} |
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/**
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* Returns 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 = h263_get_picture_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 == FF_P_TYPE)); |
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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 == 7) |
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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 == FF_P_TYPE); |
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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 == 7) { |
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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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* Encodes 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 == FF_I_TYPE); /* 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 == FF_I_TYPE); /* 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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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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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) { |
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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.motion_val[0][ s->block_index[i] ][0]; |
||||
motion_y= s->current_picture.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 == FF_I_TYPE) { |
||||
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, l, 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 */ |
||||
l= INT_BIT - 6 - bit_size; |
||||
val = (val<<l)>>l; |
||||
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); |
||||
} |
||||
Loading…
Reference in new issue