mirror of https://git.ffmpeg.org/ffmpeg.git
1121 lines
42 KiB
C
1121 lines
42 KiB
C
/*
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* MPEG-1/2 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 Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* MPEG-1/2 encoder
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*/
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#include <stdint.h>
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#include "libavutil/attributes.h"
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#include "libavutil/log.h"
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#include "libavutil/opt.h"
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#include "libavutil/stereo3d.h"
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#include "avcodec.h"
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#include "bytestream.h"
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#include "mathops.h"
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#include "mpeg12.h"
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#include "mpeg12data.h"
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#include "mpegutils.h"
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#include "mpegvideo.h"
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static const uint8_t inv_non_linear_qscale[] = {
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0, 2, 4, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16,
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};
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static const uint8_t svcd_scan_offset_placeholder[] = {
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0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80,
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0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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};
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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
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* 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 av_cold void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len)
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{
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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][1] + 6; /* rl->n */
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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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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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{
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int i;
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int64_t dmin = INT64_MAX;
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int64_t d;
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for (i = 1; i < 14; i++) {
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int64_t n0 = 1001LL / ff_mpeg12_frame_rate_tab[i].den *
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ff_mpeg12_frame_rate_tab[i].num * s->avctx->time_base.num;
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int64_t n1 = 1001LL * s->avctx->time_base.den;
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if (s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL &&
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i >= 9)
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break;
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d = FFABS(n0 - n1);
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if (d < dmin) {
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dmin = d;
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s->frame_rate_index = i;
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}
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}
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if (dmin)
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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, "MPEG-1/2 does not support %d/%d fps\n",
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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,
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"MPEG-1/2 does not support %d/%d fps, there may be AV sync issues\n",
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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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/* Main or 4:2:2 */
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avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0;
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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)
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avctx->level = 5; /* Main */
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else
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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,
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"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)
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avctx->level = 8; /* Main */
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else if (avctx->width <= 1440)
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avctx->level = 6; /* High 1440 */
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else
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avctx->level = 4; /* High */
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}
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}
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if (s->drop_frame_timecode && s->frame_rate_index != 4) {
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av_log(avctx, AV_LOG_ERROR,
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"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 FF_API_PRIVATE_OPT
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FF_DISABLE_DEPRECATION_WARNINGS
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if (avctx->timecode_frame_start)
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s->timecode_frame_start = avctx->timecode_frame_start;
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FF_ENABLE_DEPRECATION_WARNINGS
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#endif
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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, fps, v;
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int i, constraint_parameter_flag;
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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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if (aspect_ratio == 0.0)
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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 = ff_mpeg12_frame_rate_tab[s->frame_rate_index];
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/* MPEG-1 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
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* 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 &&
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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 <= 396 * 25 * framerate.den &&
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framerate.num <= framerate.den * 30 &&
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s->avctx->me_range &&
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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, 0); // frame_rate_ext_n
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put_bits(&s->pb, 5, 0); // frame_rate_ext_d
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put_header(s, EXT_START_CODE);
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put_bits(&s->pb, 4, 2); // sequence display extension
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put_bits(&s->pb, 3, 0); // video_format: 0 is components
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put_bits(&s->pb, 1, 1); // colour_description
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put_bits(&s->pb, 8, s->avctx->color_primaries); // colour_primaries
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put_bits(&s->pb, 8, s->avctx->color_trc); // transfer_characteristics
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put_bits(&s->pb, 8, s->avctx->colorspace); // matrix_coefficients
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put_bits(&s->pb, 14, s->width); // display_horizontal_size
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put_bits(&s->pb, 1, 1); // marker_bit
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put_bits(&s->pb, 14, s->height); // display_vertical_size
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put_bits(&s->pb, 3, 0); // remaining 3 bits are zero padding
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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 +
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s->timecode_frame_start;
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s->gop_picture_number = s->current_picture_ptr->f->coded_picture_number;
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if (s->drop_frame_timecode) {
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/* only works for NTSC 29.97 */
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int d = time_code / 17982;
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int m = time_code % 17982;
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/* not needed since -2,-1 / 1798 in C returns 0 */
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// if (m < 2)
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// m += 2;
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time_code += 18 * d + 2 * ((m - 2) / 1798);
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}
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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->avctx->flags & AV_CODEC_FLAG_CLOSED_GOP) || s->intra_only);
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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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{
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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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assert(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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{
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if (s->height > 2800) {
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put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127));
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/* slice_vertical_position_extension */
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put_bits(&s->pb, 3, s->mb_y >> 7);
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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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/* slice extra information */
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put_bits(&s->pb, 1, 0);
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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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AVFrameSideData *side_data;
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mpeg1_encode_sequence_header(s);
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/* MPEG-1 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,
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(s->picture_number - 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 ||
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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 ||
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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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assert(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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/* XXX: optimize the generation of this flag with entropy 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;
|
|
/* chroma_420_type */
|
|
put_bits(&s->pb, 1, s->chroma_format ==
|
|
CHROMA_420 ? s->progressive_frame : 0);
|
|
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]);
|
|
}
|
|
side_data = av_frame_get_side_data(s->current_picture_ptr->f,
|
|
AV_FRAME_DATA_STEREO3D);
|
|
if (side_data) {
|
|
AVStereo3D *stereo = (AVStereo3D *)side_data->data;
|
|
uint8_t fpa_type;
|
|
|
|
switch (stereo->type) {
|
|
case AV_STEREO3D_SIDEBYSIDE:
|
|
fpa_type = 0x03;
|
|
break;
|
|
case AV_STEREO3D_TOPBOTTOM:
|
|
fpa_type = 0x04;
|
|
break;
|
|
case AV_STEREO3D_2D:
|
|
fpa_type = 0x08;
|
|
break;
|
|
case AV_STEREO3D_SIDEBYSIDE_QUINCUNX:
|
|
fpa_type = 0x23;
|
|
break;
|
|
default:
|
|
fpa_type = 0;
|
|
break;
|
|
}
|
|
|
|
if (fpa_type != 0) {
|
|
put_header(s, USER_START_CODE);
|
|
put_bits(&s->pb, 8, 'J'); // S3D_video_format_signaling_identifier
|
|
put_bits(&s->pb, 8, 'P');
|
|
put_bits(&s->pb, 8, '3');
|
|
put_bits(&s->pb, 8, 'D');
|
|
put_bits(&s->pb, 8, 0x03); // S3D_video_format_length
|
|
|
|
put_bits(&s->pb, 1, 1); // reserved_bit
|
|
put_bits(&s->pb, 7, fpa_type); // S3D_video_format_type
|
|
put_bits(&s->pb, 8, 0x04); // reserved_data[0]
|
|
put_bits(&s->pb, 8, 0xFF); // reserved_data[1]
|
|
}
|
|
}
|
|
|
|
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)
|
|
/* motion_type: frame/field */
|
|
put_bits(&s->pb, 2, 2 - field_motion);
|
|
put_bits(&s->pb, 1, s->interlaced_dct);
|
|
}
|
|
}
|
|
|
|
// 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;
|
|
}
|
|
|
|
assert(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);
|
|
}
|
|
}
|
|
|
|
static inline void encode_dc(MpegEncContext *s, int diff, int component)
|
|
{
|
|
unsigned int diff_u = diff + 255;
|
|
if (diff_u >= 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, int16_t *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]);
|
|
}
|
|
|
|
static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
|
|
int16_t block[8][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][0][0] =
|
|
s->last_mv[0][0][1] =
|
|
s->last_mv[0][1][0] =
|
|
s->last_mv[0][1][1] = 0;
|
|
}
|
|
} else {
|
|
if (first_mb) {
|
|
assert(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) {
|
|
/* macroblock_type: macroblock_quant = 1 */
|
|
put_mb_modes(s, 2, 1, 0, 0);
|
|
put_qscale(s);
|
|
} else {
|
|
/* macroblock_type: macroblock_quant = 0 */
|
|
put_mb_modes(s, 1, 1, 0, 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) {
|
|
/* macroblock_pattern & quant */
|
|
put_mb_modes(s, 5, 1, 0, 0);
|
|
put_qscale(s);
|
|
} else {
|
|
/* macroblock_pattern only */
|
|
put_mb_modes(s, 2, 1, 0, 0);
|
|
}
|
|
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);
|
|
// RAL: f_code parameter added
|
|
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);
|
|
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);
|
|
// RAL: f_code parameter added
|
|
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);
|
|
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 {
|
|
assert(!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 {
|
|
assert(s->mv_type == MV_TYPE_FIELD);
|
|
assert(!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] = s->mv[0][i][1] * 2;
|
|
}
|
|
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] = s->mv[1][i][1] * 2;
|
|
}
|
|
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, int16_t block[8][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);
|
|
}
|
|
|
|
av_cold 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_rl_init(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
|
|
ff_rl_init(&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;
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(MpegEncContext, x)
|
|
#define VE AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
|
|
#define COMMON_OPTS \
|
|
{ "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 }, \
|
|
{ "timecode_frame_start", "GOP timecode frame start number, in non-drop-frame format", \
|
|
OFFSET(timecode_frame_start), AV_OPT_TYPE_INT64, {.i64 = 0 }, 0, INT64_MAX, 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",
|
|
.long_name = NULL_IF_CONFIG_SMALL("MPEG-1 video"),
|
|
.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 = ff_mpeg12_frame_rate_tab + 1,
|
|
.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
|
|
AV_PIX_FMT_NONE },
|
|
.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
|
|
.priv_class = &mpeg1_class,
|
|
};
|
|
|
|
AVCodec ff_mpeg2video_encoder = {
|
|
.name = "mpeg2video",
|
|
.long_name = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
|
|
.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_mpeg12_frame_rate_tab + 1,
|
|
.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
|
|
AV_PIX_FMT_YUV422P,
|
|
AV_PIX_FMT_NONE },
|
|
.capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
|
|
.priv_class = &mpeg2_class,
|
|
};
|