mirror of https://git.ffmpeg.org/ffmpeg.git
1009 lines
37 KiB
C
1009 lines
37 KiB
C
/*
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* MPEG1/2 encoder
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* Copyright (c) 2000,2001 Fabrice Bellard
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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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* MPEG1/2 encoder
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*/
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#include "avcodec.h"
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#include "dsputil.h"
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#include "mathops.h"
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#include "mpegvideo.h"
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#include "mpeg12.h"
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#include "mpeg12data.h"
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#include "bytestream.h"
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#include "libavutil/log.h"
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#include "libavutil/opt.h"
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#include "libavutil/avassert.h"
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#include "libavutil/timecode.h"
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static const uint8_t inv_non_linear_qscale[13] = {
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0, 2, 4, 6, 8,
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9,10,11,12,13,14,15,16,
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};
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static const uint8_t svcd_scan_offset_placeholder[14] = {
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0x10, 0x0E,
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0x00, 0x80, 0x81,
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0x00, 0x80, 0x81,
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0xff, 0xff, 0xff,
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0xff, 0xff, 0xff,
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};
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static void mpeg1_encode_block(MpegEncContext *s,
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DCTELEM *block,
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int component);
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static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code); // RAL: f_code parameter added
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static uint8_t mv_penalty[MAX_FCODE+1][MAX_MV*2+1];
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static uint8_t fcode_tab[MAX_MV*2+1];
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static uint8_t uni_mpeg1_ac_vlc_len [64*64*2];
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static uint8_t uni_mpeg2_ac_vlc_len [64*64*2];
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/* simple include everything table for dc, first byte is bits number next 3 are code*/
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static uint32_t mpeg1_lum_dc_uni[512];
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static uint32_t mpeg1_chr_dc_uni[512];
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static uint8_t mpeg1_index_run[2][64];
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static int8_t mpeg1_max_level[2][64];
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static void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len){
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int i;
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for(i=0; i<128; i++){
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int level= i-64;
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int run;
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if (!level)
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continue;
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for(run=0; run<64; run++){
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int len, code;
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int alevel= FFABS(level);
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if (alevel > rl->max_level[0][run])
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code= 111; /*rl->n*/
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else
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code= rl->index_run[0][run] + alevel - 1;
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if (code < 111 /* rl->n */) {
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/* length of vlc and sign */
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len= rl->table_vlc[code][1]+1;
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} else {
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len= rl->table_vlc[111/*rl->n*/][1]+6;
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if (alevel < 128) {
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len += 8;
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} else {
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len += 16;
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}
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}
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uni_ac_vlc_len [UNI_AC_ENC_INDEX(run, i)]= len;
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}
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}
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}
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static int find_frame_rate_index(MpegEncContext *s){
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int i;
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AVRational bestq= (AVRational){0, 0};
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AVRational ext;
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AVRational target = av_inv_q(s->avctx->time_base);
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for(i=1;i<14;i++) {
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if(s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL && i>=9) break;
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for (ext.num=1; ext.num <= 4; ext.num++) {
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for (ext.den=1; ext.den <= 32; ext.den++) {
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AVRational q = av_mul_q(ext, avpriv_frame_rate_tab[i]);
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if(s->codec_id != AV_CODEC_ID_MPEG2VIDEO && (ext.den!=1 || ext.num!=1))
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continue;
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if(av_gcd(ext.den, ext.num) != 1)
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continue;
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if( bestq.num==0
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|| av_nearer_q(target, bestq, q) < 0
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|| ext.num==1 && ext.den==1 && av_nearer_q(target, bestq, q) == 0){
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bestq = q;
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s->frame_rate_index= i;
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s->mpeg2_frame_rate_ext.num = ext.num;
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s->mpeg2_frame_rate_ext.den = ext.den;
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}
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}
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}
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}
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if(av_cmp_q(target, bestq))
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return -1;
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else
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return 0;
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}
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static av_cold int encode_init(AVCodecContext *avctx)
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{
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MpegEncContext *s = avctx->priv_data;
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if(ff_MPV_encode_init(avctx) < 0)
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return -1;
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if(find_frame_rate_index(s) < 0){
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if(s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
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av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n", avctx->time_base.den, avctx->time_base.num);
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return -1;
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}else{
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av_log(avctx, AV_LOG_INFO, "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n", avctx->time_base.den, avctx->time_base.num);
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}
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}
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if(avctx->profile == FF_PROFILE_UNKNOWN){
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if(avctx->level != FF_LEVEL_UNKNOWN){
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av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
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return -1;
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}
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avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0; /* Main or 4:2:2 */
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}
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if(avctx->level == FF_LEVEL_UNKNOWN){
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if(avctx->profile == 0){ /* 4:2:2 */
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if(avctx->width <= 720 && avctx->height <= 608) avctx->level = 5; /* Main */
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else avctx->level = 2; /* High */
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}else{
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if(avctx->profile != 1 && s->chroma_format != CHROMA_420){
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av_log(avctx, AV_LOG_ERROR, "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
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return -1;
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}
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if(avctx->width <= 720 && avctx->height <= 576) avctx->level = 8; /* Main */
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else if(avctx->width <= 1440) avctx->level = 6; /* High 1440 */
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else avctx->level = 4; /* High */
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}
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}
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s->drop_frame_timecode = s->drop_frame_timecode || !!(avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE);
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if (s->drop_frame_timecode)
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s->tc.flags |= AV_TIMECODE_FLAG_DROPFRAME;
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if (s->drop_frame_timecode && s->frame_rate_index != 4) {
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av_log(avctx, AV_LOG_ERROR, "Drop frame time code only allowed with 1001/30000 fps\n");
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return -1;
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}
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if (s->tc_opt_str) {
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AVRational rate = avpriv_frame_rate_tab[s->frame_rate_index];
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int ret = av_timecode_init_from_string(&s->tc, rate, s->tc_opt_str, s);
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if (ret < 0)
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return ret;
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s->drop_frame_timecode = !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME);
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s->avctx->timecode_frame_start = s->tc.start;
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} else {
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s->avctx->timecode_frame_start = 0; // default is -1
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}
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return 0;
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}
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static void put_header(MpegEncContext *s, int header)
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{
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avpriv_align_put_bits(&s->pb);
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put_bits(&s->pb, 16, header>>16);
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put_sbits(&s->pb, 16, header);
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}
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/* put sequence header if needed */
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static void mpeg1_encode_sequence_header(MpegEncContext *s)
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{
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unsigned int vbv_buffer_size;
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unsigned int fps, v;
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int i;
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uint64_t time_code;
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float best_aspect_error= 1E10;
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float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio);
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int constraint_parameter_flag;
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if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA)
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if (s->current_picture.f.key_frame) {
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AVRational framerate= avpriv_frame_rate_tab[s->frame_rate_index];
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/* mpeg1 header repeated every gop */
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put_header(s, SEQ_START_CODE);
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put_sbits(&s->pb, 12, s->width );
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put_sbits(&s->pb, 12, s->height);
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for(i=1; i<15; i++){
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float error= aspect_ratio;
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if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO || i <=1)
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error-= 1.0/ff_mpeg1_aspect[i];
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else
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error-= av_q2d(ff_mpeg2_aspect[i])*s->height/s->width;
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error= FFABS(error);
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if(error < best_aspect_error){
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best_aspect_error= error;
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s->aspect_ratio_info= i;
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}
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}
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put_bits(&s->pb, 4, s->aspect_ratio_info);
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put_bits(&s->pb, 4, s->frame_rate_index);
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if(s->avctx->rc_max_rate){
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v = (s->avctx->rc_max_rate + 399) / 400;
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if (v > 0x3ffff && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
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v = 0x3ffff;
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}else{
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v= 0x3FFFF;
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}
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if(s->avctx->rc_buffer_size)
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vbv_buffer_size = s->avctx->rc_buffer_size;
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else
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/* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */
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vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
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vbv_buffer_size= (vbv_buffer_size + 16383) / 16384;
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put_sbits(&s->pb, 18, v);
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put_bits(&s->pb, 1, 1); /* marker */
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put_sbits(&s->pb, 10, vbv_buffer_size);
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constraint_parameter_flag=
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s->width <= 768 && s->height <= 576 &&
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s->mb_width * s->mb_height <= 396 &&
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s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 &&
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framerate.num <= framerate.den*30 &&
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s->avctx->me_range && s->avctx->me_range < 128 &&
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vbv_buffer_size <= 20 &&
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v <= 1856000/400 &&
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s->codec_id == AV_CODEC_ID_MPEG1VIDEO;
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put_bits(&s->pb, 1, constraint_parameter_flag);
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ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
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ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
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if(s->codec_id == AV_CODEC_ID_MPEG2VIDEO){
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put_header(s, EXT_START_CODE);
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put_bits(&s->pb, 4, 1); //seq ext
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put_bits(&s->pb, 1, s->avctx->profile == 0); //escx 1 for 4:2:2 profile */
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put_bits(&s->pb, 3, s->avctx->profile); //profile
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put_bits(&s->pb, 4, s->avctx->level); //level
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put_bits(&s->pb, 1, s->progressive_sequence);
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put_bits(&s->pb, 2, s->chroma_format);
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put_bits(&s->pb, 2, s->width >>12);
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put_bits(&s->pb, 2, s->height>>12);
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put_bits(&s->pb, 12, v>>18); //bitrate ext
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put_bits(&s->pb, 1, 1); //marker
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put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext
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put_bits(&s->pb, 1, s->low_delay);
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put_bits(&s->pb, 2, s->mpeg2_frame_rate_ext.num-1); // frame_rate_ext_n
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put_bits(&s->pb, 5, s->mpeg2_frame_rate_ext.den-1); // frame_rate_ext_d
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}
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put_header(s, GOP_START_CODE);
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put_bits(&s->pb, 1, s->drop_frame_timecode); /* drop frame flag */
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/* time code : we must convert from the real frame rate to a
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fake mpeg frame rate in case of low frame rate */
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fps = (framerate.num + framerate.den/2)/ framerate.den;
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time_code = s->current_picture_ptr->f.coded_picture_number + s->avctx->timecode_frame_start;
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s->gop_picture_number = s->current_picture_ptr->f.coded_picture_number;
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av_assert0(s->drop_frame_timecode == !!(s->tc.flags & AV_TIMECODE_FLAG_DROPFRAME));
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if (s->drop_frame_timecode)
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time_code = av_timecode_adjust_ntsc_framenum2(time_code, fps);
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put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
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put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
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put_bits(&s->pb, 1, 1);
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put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
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put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
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put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
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put_bits(&s->pb, 1, 0); /* broken link */
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}
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}
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static inline void encode_mb_skip_run(MpegEncContext *s, int run){
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while (run >= 33) {
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put_bits(&s->pb, 11, 0x008);
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run -= 33;
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}
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put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1],
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ff_mpeg12_mbAddrIncrTable[run][0]);
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}
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static av_always_inline void put_qscale(MpegEncContext *s)
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{
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if(s->q_scale_type){
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av_assert2(s->qscale>=1 && s->qscale <=12);
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put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]);
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}else{
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put_bits(&s->pb, 5, s->qscale);
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}
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}
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void ff_mpeg1_encode_slice_header(MpegEncContext *s){
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if (s->codec_id == AV_CODEC_ID_MPEG2VIDEO && s->height > 2800) {
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put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
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put_bits(&s->pb, 3, s->mb_y >> 7); /* slice_vertical_position_extension */
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} else {
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put_header(s, SLICE_MIN_START_CODE + s->mb_y);
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}
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put_qscale(s);
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put_bits(&s->pb, 1, 0); /* slice extra information */
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}
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void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
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{
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mpeg1_encode_sequence_header(s);
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/* mpeg1 picture header */
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put_header(s, PICTURE_START_CODE);
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/* temporal reference */
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// RAL: s->picture_number instead of s->fake_picture_number
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put_bits(&s->pb, 10, (s->picture_number -
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s->gop_picture_number) & 0x3ff);
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put_bits(&s->pb, 3, s->pict_type);
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s->vbv_delay_ptr= s->pb.buf + put_bits_count(&s->pb)/8;
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put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
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// RAL: Forward f_code also needed for B frames
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if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
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put_bits(&s->pb, 1, 0); /* half pel coordinates */
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if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
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put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
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else
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put_bits(&s->pb, 3, 7); /* forward_f_code */
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}
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// RAL: Backward f_code necessary for B frames
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if (s->pict_type == AV_PICTURE_TYPE_B) {
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put_bits(&s->pb, 1, 0); /* half pel coordinates */
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if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO)
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put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
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else
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put_bits(&s->pb, 3, 7); /* backward_f_code */
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}
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put_bits(&s->pb, 1, 0); /* extra bit picture */
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s->frame_pred_frame_dct = 1;
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if(s->codec_id == AV_CODEC_ID_MPEG2VIDEO){
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put_header(s, EXT_START_CODE);
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put_bits(&s->pb, 4, 8); //pic ext
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if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type == AV_PICTURE_TYPE_B) {
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put_bits(&s->pb, 4, s->f_code);
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put_bits(&s->pb, 4, s->f_code);
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}else{
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put_bits(&s->pb, 8, 255);
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}
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if (s->pict_type == AV_PICTURE_TYPE_B) {
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put_bits(&s->pb, 4, s->b_code);
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put_bits(&s->pb, 4, s->b_code);
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}else{
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put_bits(&s->pb, 8, 255);
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}
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put_bits(&s->pb, 2, s->intra_dc_precision);
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av_assert0(s->picture_structure == PICT_FRAME);
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put_bits(&s->pb, 2, s->picture_structure);
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if (s->progressive_sequence) {
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put_bits(&s->pb, 1, 0); /* no repeat */
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} else {
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put_bits(&s->pb, 1, s->current_picture_ptr->f.top_field_first);
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}
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/* XXX: optimize the generation of this flag with entropy
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measures */
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s->frame_pred_frame_dct = s->progressive_sequence;
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put_bits(&s->pb, 1, s->frame_pred_frame_dct);
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put_bits(&s->pb, 1, s->concealment_motion_vectors);
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put_bits(&s->pb, 1, s->q_scale_type);
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put_bits(&s->pb, 1, s->intra_vlc_format);
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put_bits(&s->pb, 1, s->alternate_scan);
|
|
put_bits(&s->pb, 1, s->repeat_first_field);
|
|
s->progressive_frame = s->progressive_sequence;
|
|
put_bits(&s->pb, 1, s->chroma_format == CHROMA_420 ? s->progressive_frame : 0); /* chroma_420_type */
|
|
put_bits(&s->pb, 1, s->progressive_frame);
|
|
put_bits(&s->pb, 1, 0); //composite_display_flag
|
|
}
|
|
if (s->scan_offset) {
|
|
int i;
|
|
|
|
put_header(s, USER_START_CODE);
|
|
for(i=0; i<sizeof(svcd_scan_offset_placeholder); i++){
|
|
put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
|
|
}
|
|
}
|
|
|
|
s->mb_y=0;
|
|
ff_mpeg1_encode_slice_header(s);
|
|
}
|
|
|
|
static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
|
|
int has_mv, int field_motion)
|
|
{
|
|
put_bits(&s->pb, n, bits);
|
|
if (!s->frame_pred_frame_dct) {
|
|
if (has_mv)
|
|
put_bits(&s->pb, 2, 2 - field_motion); /* motion_type: frame/field */
|
|
put_bits(&s->pb, 1, s->interlaced_dct);
|
|
}
|
|
}
|
|
|
|
static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
|
|
DCTELEM block[6][64],
|
|
int motion_x, int motion_y,
|
|
int mb_block_count)
|
|
{
|
|
int i, cbp;
|
|
const int mb_x = s->mb_x;
|
|
const int mb_y = s->mb_y;
|
|
const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
|
|
|
|
/* compute cbp */
|
|
cbp = 0;
|
|
for(i=0;i<mb_block_count;i++) {
|
|
if (s->block_last_index[i] >= 0)
|
|
cbp |= 1 << (mb_block_count - 1 - i);
|
|
}
|
|
|
|
if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
|
|
(mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == AV_CODEC_ID_MPEG1VIDEO)) &&
|
|
((s->pict_type == AV_PICTURE_TYPE_P && (motion_x | motion_y) == 0) ||
|
|
(s->pict_type == AV_PICTURE_TYPE_B && s->mv_dir == s->last_mv_dir && (((s->mv_dir & MV_DIR_FORWARD) ? ((s->mv[0][0][0] - s->last_mv[0][0][0])|(s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
|
|
((s->mv_dir & MV_DIR_BACKWARD) ? ((s->mv[1][0][0] - s->last_mv[1][0][0])|(s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
|
|
s->mb_skip_run++;
|
|
s->qscale -= s->dquant;
|
|
s->skip_count++;
|
|
s->misc_bits++;
|
|
s->last_bits++;
|
|
if(s->pict_type == AV_PICTURE_TYPE_P){
|
|
s->last_mv[0][1][0]= s->last_mv[0][0][0]=
|
|
s->last_mv[0][1][1]= s->last_mv[0][0][1]= 0;
|
|
}
|
|
} else {
|
|
if(first_mb){
|
|
av_assert0(s->mb_skip_run == 0);
|
|
encode_mb_skip_run(s, s->mb_x);
|
|
}else{
|
|
encode_mb_skip_run(s, s->mb_skip_run);
|
|
}
|
|
|
|
if (s->pict_type == AV_PICTURE_TYPE_I) {
|
|
if(s->dquant && cbp){
|
|
put_mb_modes(s, 2, 1, 0, 0); /* macroblock_type : macroblock_quant = 1 */
|
|
put_qscale(s);
|
|
}else{
|
|
put_mb_modes(s, 1, 1, 0, 0); /* macroblock_type : macroblock_quant = 0 */
|
|
s->qscale -= s->dquant;
|
|
}
|
|
s->misc_bits+= get_bits_diff(s);
|
|
s->i_count++;
|
|
} else if (s->mb_intra) {
|
|
if(s->dquant && cbp){
|
|
put_mb_modes(s, 6, 0x01, 0, 0);
|
|
put_qscale(s);
|
|
}else{
|
|
put_mb_modes(s, 5, 0x03, 0, 0);
|
|
s->qscale -= s->dquant;
|
|
}
|
|
s->misc_bits+= get_bits_diff(s);
|
|
s->i_count++;
|
|
memset(s->last_mv, 0, sizeof(s->last_mv));
|
|
} else if (s->pict_type == AV_PICTURE_TYPE_P) {
|
|
if(s->mv_type == MV_TYPE_16X16){
|
|
if (cbp != 0) {
|
|
if ((motion_x|motion_y) == 0) {
|
|
if(s->dquant){
|
|
put_mb_modes(s, 5, 1, 0, 0); /* macroblock_pattern & quant */
|
|
put_qscale(s);
|
|
}else{
|
|
put_mb_modes(s, 2, 1, 0, 0); /* macroblock_pattern only */
|
|
}
|
|
s->misc_bits+= get_bits_diff(s);
|
|
} else {
|
|
if(s->dquant){
|
|
put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
|
|
put_qscale(s);
|
|
}else{
|
|
put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
|
|
}
|
|
s->misc_bits+= get_bits_diff(s);
|
|
mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
|
|
mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
|
|
s->mv_bits+= get_bits_diff(s);
|
|
}
|
|
} else {
|
|
put_bits(&s->pb, 3, 1); /* motion only */
|
|
if (!s->frame_pred_frame_dct)
|
|
put_bits(&s->pb, 2, 2); /* motion_type: frame */
|
|
s->misc_bits+= get_bits_diff(s);
|
|
mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
|
|
mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
|
|
s->qscale -= s->dquant;
|
|
s->mv_bits+= get_bits_diff(s);
|
|
}
|
|
s->last_mv[0][1][0]= s->last_mv[0][0][0]= motion_x;
|
|
s->last_mv[0][1][1]= s->last_mv[0][0][1]= motion_y;
|
|
}else{
|
|
av_assert2(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
|
|
|
|
if (cbp) {
|
|
if(s->dquant){
|
|
put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
|
|
put_qscale(s);
|
|
}else{
|
|
put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
|
|
}
|
|
} else {
|
|
put_bits(&s->pb, 3, 1); /* motion only */
|
|
put_bits(&s->pb, 2, 1); /* motion_type: field */
|
|
s->qscale -= s->dquant;
|
|
}
|
|
s->misc_bits+= get_bits_diff(s);
|
|
for(i=0; i<2; i++){
|
|
put_bits(&s->pb, 1, s->field_select[0][i]);
|
|
mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
|
|
mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
|
|
s->last_mv[0][i][0]= s->mv[0][i][0];
|
|
s->last_mv[0][i][1]= 2*s->mv[0][i][1];
|
|
}
|
|
s->mv_bits+= get_bits_diff(s);
|
|
}
|
|
if(cbp) {
|
|
if (s->chroma_y_shift) {
|
|
put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]);
|
|
} else {
|
|
put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]);
|
|
put_sbits(&s->pb, 2, cbp);
|
|
}
|
|
}
|
|
s->f_count++;
|
|
} else{
|
|
if(s->mv_type == MV_TYPE_16X16){
|
|
if (cbp){ // With coded bloc pattern
|
|
if (s->dquant) {
|
|
if(s->mv_dir == MV_DIR_FORWARD)
|
|
put_mb_modes(s, 6, 3, 1, 0);
|
|
else
|
|
put_mb_modes(s, 8-s->mv_dir, 2, 1, 0);
|
|
put_qscale(s);
|
|
} else {
|
|
put_mb_modes(s, 5-s->mv_dir, 3, 1, 0);
|
|
}
|
|
}else{ // No coded bloc pattern
|
|
put_bits(&s->pb, 5-s->mv_dir, 2);
|
|
if (!s->frame_pred_frame_dct)
|
|
put_bits(&s->pb, 2, 2); /* motion_type: frame */
|
|
s->qscale -= s->dquant;
|
|
}
|
|
s->misc_bits += get_bits_diff(s);
|
|
if (s->mv_dir&MV_DIR_FORWARD){
|
|
mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
|
|
mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
|
|
s->last_mv[0][0][0]=s->last_mv[0][1][0]= s->mv[0][0][0];
|
|
s->last_mv[0][0][1]=s->last_mv[0][1][1]= s->mv[0][0][1];
|
|
s->f_count++;
|
|
}
|
|
if (s->mv_dir&MV_DIR_BACKWARD){
|
|
mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
|
|
mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
|
|
s->last_mv[1][0][0]=s->last_mv[1][1][0]= s->mv[1][0][0];
|
|
s->last_mv[1][0][1]=s->last_mv[1][1][1]= s->mv[1][0][1];
|
|
s->b_count++;
|
|
}
|
|
}else{
|
|
av_assert2(s->mv_type == MV_TYPE_FIELD);
|
|
av_assert2(!s->frame_pred_frame_dct);
|
|
if (cbp){ // With coded bloc pattern
|
|
if (s->dquant) {
|
|
if(s->mv_dir == MV_DIR_FORWARD)
|
|
put_mb_modes(s, 6, 3, 1, 1);
|
|
else
|
|
put_mb_modes(s, 8-s->mv_dir, 2, 1, 1);
|
|
put_qscale(s);
|
|
} else {
|
|
put_mb_modes(s, 5-s->mv_dir, 3, 1, 1);
|
|
}
|
|
}else{ // No coded bloc pattern
|
|
put_bits(&s->pb, 5-s->mv_dir, 2);
|
|
put_bits(&s->pb, 2, 1); /* motion_type: field */
|
|
s->qscale -= s->dquant;
|
|
}
|
|
s->misc_bits += get_bits_diff(s);
|
|
if (s->mv_dir&MV_DIR_FORWARD){
|
|
for(i=0; i<2; i++){
|
|
put_bits(&s->pb, 1, s->field_select[0][i]);
|
|
mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
|
|
mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
|
|
s->last_mv[0][i][0]= s->mv[0][i][0];
|
|
s->last_mv[0][i][1]= 2*s->mv[0][i][1];
|
|
}
|
|
s->f_count++;
|
|
}
|
|
if (s->mv_dir&MV_DIR_BACKWARD){
|
|
for(i=0; i<2; i++){
|
|
put_bits(&s->pb, 1, s->field_select[1][i]);
|
|
mpeg1_encode_motion(s, s->mv[1][i][0] - s->last_mv[1][i][0] , s->b_code);
|
|
mpeg1_encode_motion(s, s->mv[1][i][1] - (s->last_mv[1][i][1]>>1), s->b_code);
|
|
s->last_mv[1][i][0]= s->mv[1][i][0];
|
|
s->last_mv[1][i][1]= 2*s->mv[1][i][1];
|
|
}
|
|
s->b_count++;
|
|
}
|
|
}
|
|
s->mv_bits += get_bits_diff(s);
|
|
if(cbp) {
|
|
if (s->chroma_y_shift) {
|
|
put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp][1], ff_mpeg12_mbPatTable[cbp][0]);
|
|
} else {
|
|
put_bits(&s->pb, ff_mpeg12_mbPatTable[cbp>>2][1], ff_mpeg12_mbPatTable[cbp>>2][0]);
|
|
put_sbits(&s->pb, 2, cbp);
|
|
}
|
|
}
|
|
}
|
|
for(i=0;i<mb_block_count;i++) {
|
|
if (cbp & (1 << (mb_block_count - 1 - i))) {
|
|
mpeg1_encode_block(s, block[i], i);
|
|
}
|
|
}
|
|
s->mb_skip_run = 0;
|
|
if(s->mb_intra)
|
|
s->i_tex_bits+= get_bits_diff(s);
|
|
else
|
|
s->p_tex_bits+= get_bits_diff(s);
|
|
}
|
|
}
|
|
|
|
void ff_mpeg1_encode_mb(MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y)
|
|
{
|
|
if (s->chroma_format == CHROMA_420) mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
|
|
else mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
|
|
}
|
|
|
|
// RAL: Parameter added: f_or_b_code
|
|
static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
|
|
{
|
|
if (val == 0) {
|
|
/* zero vector */
|
|
put_bits(&s->pb,
|
|
ff_mpeg12_mbMotionVectorTable[0][1],
|
|
ff_mpeg12_mbMotionVectorTable[0][0]);
|
|
} else {
|
|
int code, sign, bits;
|
|
int bit_size = f_or_b_code - 1;
|
|
int range = 1 << bit_size;
|
|
/* modulo encoding */
|
|
val = sign_extend(val, 5 + bit_size);
|
|
|
|
if (val >= 0) {
|
|
val--;
|
|
code = (val >> bit_size) + 1;
|
|
bits = val & (range - 1);
|
|
sign = 0;
|
|
} else {
|
|
val = -val;
|
|
val--;
|
|
code = (val >> bit_size) + 1;
|
|
bits = val & (range - 1);
|
|
sign = 1;
|
|
}
|
|
|
|
av_assert2(code > 0 && code <= 16);
|
|
|
|
put_bits(&s->pb,
|
|
ff_mpeg12_mbMotionVectorTable[code][1],
|
|
ff_mpeg12_mbMotionVectorTable[code][0]);
|
|
|
|
put_bits(&s->pb, 1, sign);
|
|
if (bit_size > 0) {
|
|
put_bits(&s->pb, bit_size, bits);
|
|
}
|
|
}
|
|
}
|
|
|
|
void ff_mpeg1_encode_init(MpegEncContext *s)
|
|
{
|
|
static int done=0;
|
|
|
|
ff_mpeg12_common_init(s);
|
|
|
|
if(!done){
|
|
int f_code;
|
|
int mv;
|
|
int i;
|
|
|
|
done=1;
|
|
ff_init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
|
|
ff_init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
|
|
|
|
for(i=0; i<64; i++)
|
|
{
|
|
mpeg1_max_level[0][i]= ff_rl_mpeg1.max_level[0][i];
|
|
mpeg1_index_run[0][i]= ff_rl_mpeg1.index_run[0][i];
|
|
}
|
|
|
|
init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
|
|
if(s->intra_vlc_format)
|
|
init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
|
|
|
|
/* build unified dc encoding tables */
|
|
for(i=-255; i<256; i++)
|
|
{
|
|
int adiff, index;
|
|
int bits, code;
|
|
int diff=i;
|
|
|
|
adiff = FFABS(diff);
|
|
if(diff<0) diff--;
|
|
index = av_log2(2*adiff);
|
|
|
|
bits= ff_mpeg12_vlc_dc_lum_bits[index] + index;
|
|
code= (ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));
|
|
mpeg1_lum_dc_uni[i+255]= bits + (code<<8);
|
|
|
|
bits= ff_mpeg12_vlc_dc_chroma_bits[index] + index;
|
|
code= (ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));
|
|
mpeg1_chr_dc_uni[i+255]= bits + (code<<8);
|
|
}
|
|
|
|
for(f_code=1; f_code<=MAX_FCODE; f_code++){
|
|
for(mv=-MAX_MV; mv<=MAX_MV; mv++){
|
|
int len;
|
|
|
|
if(mv==0) len= ff_mpeg12_mbMotionVectorTable[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<17){
|
|
len= ff_mpeg12_mbMotionVectorTable[code][1] + 1 + bit_size;
|
|
}else{
|
|
len= ff_mpeg12_mbMotionVectorTable[16][1] + 2 + bit_size;
|
|
}
|
|
}
|
|
|
|
mv_penalty[f_code][mv+MAX_MV]= len;
|
|
}
|
|
}
|
|
|
|
|
|
for(f_code=MAX_FCODE; f_code>0; f_code--){
|
|
for(mv=-(8<<f_code); mv<(8<<f_code); mv++){
|
|
fcode_tab[mv+MAX_MV]= f_code;
|
|
}
|
|
}
|
|
}
|
|
s->me.mv_penalty= mv_penalty;
|
|
s->fcode_tab= fcode_tab;
|
|
if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO){
|
|
s->min_qcoeff=-255;
|
|
s->max_qcoeff= 255;
|
|
}else{
|
|
s->min_qcoeff=-2047;
|
|
s->max_qcoeff= 2047;
|
|
}
|
|
if (s->intra_vlc_format) {
|
|
s->intra_ac_vlc_length=
|
|
s->intra_ac_vlc_last_length= uni_mpeg2_ac_vlc_len;
|
|
} else {
|
|
s->intra_ac_vlc_length=
|
|
s->intra_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
|
|
}
|
|
s->inter_ac_vlc_length=
|
|
s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
|
|
}
|
|
|
|
static inline void encode_dc(MpegEncContext *s, int diff, int component)
|
|
{
|
|
if(((unsigned) (diff+255)) >= 511){
|
|
int index;
|
|
|
|
if(diff<0){
|
|
index= av_log2_16bit(-2*diff);
|
|
diff--;
|
|
}else{
|
|
index= av_log2_16bit(2*diff);
|
|
}
|
|
if (component == 0) {
|
|
put_bits(
|
|
&s->pb,
|
|
ff_mpeg12_vlc_dc_lum_bits[index] + index,
|
|
(ff_mpeg12_vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1)));
|
|
}else{
|
|
put_bits(
|
|
&s->pb,
|
|
ff_mpeg12_vlc_dc_chroma_bits[index] + index,
|
|
(ff_mpeg12_vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1)));
|
|
}
|
|
}else{
|
|
if (component == 0) {
|
|
put_bits(
|
|
&s->pb,
|
|
mpeg1_lum_dc_uni[diff+255]&0xFF,
|
|
mpeg1_lum_dc_uni[diff+255]>>8);
|
|
} else {
|
|
put_bits(
|
|
&s->pb,
|
|
mpeg1_chr_dc_uni[diff+255]&0xFF,
|
|
mpeg1_chr_dc_uni[diff+255]>>8);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void mpeg1_encode_block(MpegEncContext *s,
|
|
DCTELEM *block,
|
|
int n)
|
|
{
|
|
int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
|
|
int code, component;
|
|
const uint16_t (*table_vlc)[2] = ff_rl_mpeg1.table_vlc;
|
|
|
|
last_index = s->block_last_index[n];
|
|
|
|
/* DC coef */
|
|
if (s->mb_intra) {
|
|
component = (n <= 3 ? 0 : (n&1) + 1);
|
|
dc = block[0]; /* overflow is impossible */
|
|
diff = dc - s->last_dc[component];
|
|
encode_dc(s, diff, component);
|
|
s->last_dc[component] = dc;
|
|
i = 1;
|
|
if (s->intra_vlc_format)
|
|
table_vlc = ff_rl_mpeg2.table_vlc;
|
|
} else {
|
|
/* encode the first coefficient : needs to be done here because
|
|
it is handled slightly differently */
|
|
level = block[0];
|
|
if (abs(level) == 1) {
|
|
code = ((uint32_t)level >> 31); /* the sign bit */
|
|
put_bits(&s->pb, 2, code | 0x02);
|
|
i = 1;
|
|
} else {
|
|
i = 0;
|
|
last_non_zero = -1;
|
|
goto next_coef;
|
|
}
|
|
}
|
|
|
|
/* now quantify & encode AC coefs */
|
|
last_non_zero = i - 1;
|
|
|
|
for(;i<=last_index;i++) {
|
|
j = s->intra_scantable.permutated[i];
|
|
level = block[j];
|
|
next_coef:
|
|
/* encode using VLC */
|
|
if (level != 0) {
|
|
run = i - last_non_zero - 1;
|
|
|
|
alevel= level;
|
|
MASK_ABS(sign, alevel);
|
|
sign&=1;
|
|
|
|
if (alevel <= mpeg1_max_level[0][run]){
|
|
code= mpeg1_index_run[0][run] + alevel - 1;
|
|
/* store the vlc & sign at once */
|
|
put_bits(&s->pb, table_vlc[code][1]+1, (table_vlc[code][0]<<1) + sign);
|
|
} else {
|
|
/* escape seems to be pretty rare <5% so I do not optimize it */
|
|
put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
|
|
/* escape: only clip in this case */
|
|
put_bits(&s->pb, 6, run);
|
|
if(s->codec_id == AV_CODEC_ID_MPEG1VIDEO){
|
|
if (alevel < 128) {
|
|
put_sbits(&s->pb, 8, level);
|
|
} else {
|
|
if (level < 0) {
|
|
put_bits(&s->pb, 16, 0x8001 + level + 255);
|
|
} else {
|
|
put_sbits(&s->pb, 16, level);
|
|
}
|
|
}
|
|
}else{
|
|
put_sbits(&s->pb, 12, level);
|
|
}
|
|
}
|
|
last_non_zero = i;
|
|
}
|
|
}
|
|
/* end of block */
|
|
put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(MpegEncContext, x)
|
|
#define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
|
|
#define COMMON_OPTS\
|
|
{ "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format", OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
|
|
{ "intra_vlc", "Use MPEG-2 intra VLC table.", OFFSET(intra_vlc_format), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },\
|
|
{ "drop_frame_timecode", "Timecode is in drop frame format.", OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE}, \
|
|
{ "scan_offset", "Reserve space for SVCD scan offset user data.", OFFSET(scan_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
|
|
|
|
static const AVOption mpeg1_options[] = {
|
|
COMMON_OPTS
|
|
FF_MPV_COMMON_OPTS
|
|
{ NULL },
|
|
};
|
|
|
|
static const AVOption mpeg2_options[] = {
|
|
COMMON_OPTS
|
|
{ "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
|
|
{ "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
|
|
FF_MPV_COMMON_OPTS
|
|
{ NULL },
|
|
};
|
|
|
|
#define mpeg12_class(x)\
|
|
static const AVClass mpeg## x ##_class = {\
|
|
.class_name = "mpeg" #x "video encoder",\
|
|
.item_name = av_default_item_name,\
|
|
.option = mpeg## x ##_options,\
|
|
.version = LIBAVUTIL_VERSION_INT,\
|
|
};
|
|
|
|
mpeg12_class(1)
|
|
mpeg12_class(2)
|
|
|
|
AVCodec ff_mpeg1video_encoder = {
|
|
.name = "mpeg1video",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_MPEG1VIDEO,
|
|
.priv_data_size = sizeof(MpegEncContext),
|
|
.init = encode_init,
|
|
.encode2 = ff_MPV_encode_picture,
|
|
.close = ff_MPV_encode_end,
|
|
.supported_framerates = avpriv_frame_rate_tab+1,
|
|
.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P,
|
|
AV_PIX_FMT_NONE },
|
|
.capabilities = CODEC_CAP_DELAY,
|
|
.long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
|
|
.priv_class = &mpeg1_class,
|
|
};
|
|
|
|
AVCodec ff_mpeg2video_encoder = {
|
|
.name = "mpeg2video",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_MPEG2VIDEO,
|
|
.priv_data_size = sizeof(MpegEncContext),
|
|
.init = encode_init,
|
|
.encode2 = ff_MPV_encode_picture,
|
|
.close = ff_MPV_encode_end,
|
|
.supported_framerates = ff_mpeg2_frame_rate_tab,
|
|
.pix_fmts = (const enum AVPixelFormat[]){
|
|
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE
|
|
},
|
|
.capabilities = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
|
|
.long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
|
|
.priv_class = &mpeg2_class,
|
|
};
|