/* * MPEG1/2 encoder * Copyright (c) 2000,2001 Fabrice Bellard * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * MPEG1/2 encoder */ #include "avcodec.h" #include "dsputil.h" #include "mpegvideo.h" #include "mpeg12.h" #include "mpeg12data.h" #include "bytestream.h" static const uint8_t inv_non_linear_qscale[13] = { 0, 2, 4, 6, 8, 9,10,11,12,13,14,15,16, }; static const uint8_t svcd_scan_offset_placeholder[14] = { 0x10, 0x0E, 0x00, 0x80, 0x81, 0x00, 0x80, 0x81, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, }; static void mpeg1_encode_block(MpegEncContext *s, DCTELEM *block, int component); static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code); // RAL: f_code parameter added static uint8_t mv_penalty[MAX_FCODE+1][MAX_MV*2+1]; static uint8_t fcode_tab[MAX_MV*2+1]; static uint8_t uni_mpeg1_ac_vlc_len [64*64*2]; static uint8_t uni_mpeg2_ac_vlc_len [64*64*2]; /* simple include everything table for dc, first byte is bits number next 3 are code*/ static uint32_t mpeg1_lum_dc_uni[512]; static uint32_t mpeg1_chr_dc_uni[512]; static uint8_t mpeg1_index_run[2][64]; static int8_t mpeg1_max_level[2][64]; static void init_uni_ac_vlc(RLTable *rl, uint8_t *uni_ac_vlc_len){ int i; for(i=0; i<128; i++){ int level= i-64; int run; for(run=0; run<64; run++){ int len, bits, code; int alevel= FFABS(level); int sign= (level>>31)&1; if (alevel > rl->max_level[0][run]) code= 111; /*rl->n*/ else code= rl->index_run[0][run] + alevel - 1; if (code < 111 /* rl->n */) { /* store the vlc & sign at once */ len= rl->table_vlc[code][1]+1; bits= (rl->table_vlc[code][0]<<1) + sign; } else { len= rl->table_vlc[111/*rl->n*/][1]+6; bits= rl->table_vlc[111/*rl->n*/][0]<<6; bits|= run; if (alevel < 128) { bits<<=8; len+=8; bits|= level & 0xff; } else { bits<<=16; len+=16; bits|= level & 0xff; if (level < 0) { bits|= 0x8001 + level + 255; } else { bits|= level & 0xffff; } } } uni_ac_vlc_len [UNI_AC_ENC_INDEX(run, i)]= len; } } } static int find_frame_rate_index(MpegEncContext *s){ int i; int64_t dmin= INT64_MAX; int64_t d; for(i=1;i<14;i++) { int64_t n0= 1001LL/ff_frame_rate_tab[i].den*ff_frame_rate_tab[i].num*s->avctx->time_base.num; int64_t n1= 1001LL*s->avctx->time_base.den; if(s->avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL && i>=9) break; d = FFABS(n0 - n1); if(d < dmin){ dmin=d; s->frame_rate_index= i; } } if(dmin) return -1; else return 0; } static av_cold int encode_init(AVCodecContext *avctx) { MpegEncContext *s = avctx->priv_data; if(MPV_encode_init(avctx) < 0) return -1; if(find_frame_rate_index(s) < 0){ if(s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){ av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n", avctx->time_base.den, avctx->time_base.num); return -1; }else{ 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); } } if(avctx->profile == FF_PROFILE_UNKNOWN){ if(avctx->level != FF_LEVEL_UNKNOWN){ av_log(avctx, AV_LOG_ERROR, "Set profile and level\n"); return -1; } avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0; /* Main or 4:2:2 */ } if(avctx->level == FF_LEVEL_UNKNOWN){ if(avctx->profile == 0){ /* 4:2:2 */ if(avctx->width <= 720 && avctx->height <= 608) avctx->level = 5; /* Main */ else avctx->level = 2; /* High */ }else{ if(avctx->profile != 1 && s->chroma_format != CHROMA_420){ av_log(avctx, AV_LOG_ERROR, "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n"); return -1; } if(avctx->width <= 720 && avctx->height <= 576) avctx->level = 8; /* Main */ else if(avctx->width <= 1440) avctx->level = 6; /* High 1440 */ else avctx->level = 4; /* High */ } } if((avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE) && s->frame_rate_index != 4){ av_log(avctx, AV_LOG_ERROR, "Drop frame time code only allowed with 1001/30000 fps\n"); return -1; } return 0; } static void put_header(MpegEncContext *s, int header) { align_put_bits(&s->pb); put_bits(&s->pb, 16, header>>16); put_sbits(&s->pb, 16, header); } /* put sequence header if needed */ static void mpeg1_encode_sequence_header(MpegEncContext *s) { unsigned int vbv_buffer_size; unsigned int fps, v; int i; uint64_t time_code; float best_aspect_error= 1E10; float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio); int constraint_parameter_flag; if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA) if (s->current_picture.key_frame) { AVRational framerate= ff_frame_rate_tab[s->frame_rate_index]; /* mpeg1 header repeated every gop */ put_header(s, SEQ_START_CODE); put_sbits(&s->pb, 12, s->width ); put_sbits(&s->pb, 12, s->height); for(i=1; i<15; i++){ float error= aspect_ratio; if(s->codec_id == CODEC_ID_MPEG1VIDEO || i <=1) error-= 1.0/ff_mpeg1_aspect[i]; else error-= av_q2d(ff_mpeg2_aspect[i])*s->height/s->width; error= FFABS(error); if(error < best_aspect_error){ best_aspect_error= error; s->aspect_ratio_info= i; } } put_bits(&s->pb, 4, s->aspect_ratio_info); put_bits(&s->pb, 4, s->frame_rate_index); if(s->avctx->rc_max_rate){ v = (s->avctx->rc_max_rate + 399) / 400; if (v > 0x3ffff && s->codec_id == CODEC_ID_MPEG1VIDEO) v = 0x3ffff; }else{ v= 0x3FFFF; } if(s->avctx->rc_buffer_size) vbv_buffer_size = s->avctx->rc_buffer_size; else /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */ vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024; vbv_buffer_size= (vbv_buffer_size + 16383) / 16384; put_sbits(&s->pb, 18, v); put_bits(&s->pb, 1, 1); /* marker */ put_sbits(&s->pb, 10, vbv_buffer_size); constraint_parameter_flag= s->width <= 768 && s->height <= 576 && s->mb_width * s->mb_height <= 396 && s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 && framerate.num <= framerate.den*30 && s->avctx->me_range && s->avctx->me_range < 128 && vbv_buffer_size <= 20 && v <= 1856000/400 && s->codec_id == CODEC_ID_MPEG1VIDEO; put_bits(&s->pb, 1, constraint_parameter_flag); ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix); ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix); if(s->codec_id == CODEC_ID_MPEG2VIDEO){ put_header(s, EXT_START_CODE); put_bits(&s->pb, 4, 1); //seq ext put_bits(&s->pb, 1, s->avctx->profile == 0); //escx 1 for 4:2:2 profile */ put_bits(&s->pb, 3, s->avctx->profile); //profile put_bits(&s->pb, 4, s->avctx->level); //level put_bits(&s->pb, 1, s->progressive_sequence); put_bits(&s->pb, 2, s->chroma_format); put_bits(&s->pb, 2, s->width >>12); put_bits(&s->pb, 2, s->height>>12); put_bits(&s->pb, 12, v>>18); //bitrate ext put_bits(&s->pb, 1, 1); //marker put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext put_bits(&s->pb, 1, s->low_delay); put_bits(&s->pb, 2, 0); // frame_rate_ext_n put_bits(&s->pb, 5, 0); // frame_rate_ext_d } put_header(s, GOP_START_CODE); put_bits(&s->pb, 1, !!(s->avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE)); /* drop frame flag */ /* time code : we must convert from the real frame rate to a fake mpeg frame rate in case of low frame rate */ fps = (framerate.num + framerate.den/2)/ framerate.den; time_code = s->current_picture_ptr->coded_picture_number + s->avctx->timecode_frame_start; s->gop_picture_number = s->current_picture_ptr->coded_picture_number; if (s->avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE) { /* only works for NTSC 29.97 */ int d = time_code / 17982; int m = time_code % 17982; //if (m < 2) m += 2; /* not needed since -2,-1 / 1798 in C returns 0 */ time_code += 18 * d + 2 * ((m - 2) / 1798); } put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24)); put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60)); put_bits(&s->pb, 1, 1); put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60)); put_bits(&s->pb, 6, (uint32_t)((time_code % fps))); put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP)); put_bits(&s->pb, 1, 0); /* broken link */ } } static inline void encode_mb_skip_run(MpegEncContext *s, int run){ while (run >= 33) { put_bits(&s->pb, 11, 0x008); run -= 33; } put_bits(&s->pb, ff_mpeg12_mbAddrIncrTable[run][1], ff_mpeg12_mbAddrIncrTable[run][0]); } static av_always_inline void put_qscale(MpegEncContext *s) { if(s->q_scale_type){ assert(s->qscale>=1 && s->qscale <=12); put_bits(&s->pb, 5, inv_non_linear_qscale[s->qscale]); }else{ put_bits(&s->pb, 5, s->qscale); } } void ff_mpeg1_encode_slice_header(MpegEncContext *s){ if (s->height > 2800) { put_header(s, SLICE_MIN_START_CODE + (s->mb_y & 127)); put_bits(&s->pb, 3, s->mb_y >> 7); /* slice_vertical_position_extension */ } else { put_header(s, SLICE_MIN_START_CODE + s->mb_y); } put_qscale(s); put_bits(&s->pb, 1, 0); /* slice extra information */ } void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number) { mpeg1_encode_sequence_header(s); /* mpeg1 picture header */ put_header(s, PICTURE_START_CODE); /* temporal reference */ // RAL: s->picture_number instead of s->fake_picture_number put_bits(&s->pb, 10, (s->picture_number - s->gop_picture_number) & 0x3ff); put_bits(&s->pb, 3, s->pict_type); s->vbv_delay_ptr= s->pb.buf + put_bits_count(&s->pb)/8; put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */ // RAL: Forward f_code also needed for B frames if (s->pict_type == FF_P_TYPE || s->pict_type == FF_B_TYPE) { put_bits(&s->pb, 1, 0); /* half pel coordinates */ if(s->codec_id == CODEC_ID_MPEG1VIDEO) put_bits(&s->pb, 3, s->f_code); /* forward_f_code */ else put_bits(&s->pb, 3, 7); /* forward_f_code */ } // RAL: Backward f_code necessary for B frames if (s->pict_type == FF_B_TYPE) { put_bits(&s->pb, 1, 0); /* half pel coordinates */ if(s->codec_id == CODEC_ID_MPEG1VIDEO) put_bits(&s->pb, 3, s->b_code); /* backward_f_code */ else put_bits(&s->pb, 3, 7); /* backward_f_code */ } put_bits(&s->pb, 1, 0); /* extra bit picture */ s->frame_pred_frame_dct = 1; if(s->codec_id == CODEC_ID_MPEG2VIDEO){ put_header(s, EXT_START_CODE); put_bits(&s->pb, 4, 8); //pic ext if (s->pict_type == FF_P_TYPE || s->pict_type == FF_B_TYPE) { put_bits(&s->pb, 4, s->f_code); put_bits(&s->pb, 4, s->f_code); }else{ put_bits(&s->pb, 8, 255); } if (s->pict_type == FF_B_TYPE) { put_bits(&s->pb, 4, s->b_code); put_bits(&s->pb, 4, s->b_code); }else{ put_bits(&s->pb, 8, 255); } put_bits(&s->pb, 2, s->intra_dc_precision); assert(s->picture_structure == PICT_FRAME); put_bits(&s->pb, 2, s->picture_structure); if (s->progressive_sequence) { put_bits(&s->pb, 1, 0); /* no repeat */ } else { put_bits(&s->pb, 1, s->current_picture_ptr->top_field_first); } /* XXX: optimize the generation of this flag with entropy measures */ s->frame_pred_frame_dct = s->progressive_sequence; put_bits(&s->pb, 1, s->frame_pred_frame_dct); put_bits(&s->pb, 1, s->concealment_motion_vectors); put_bits(&s->pb, 1, s->q_scale_type); put_bits(&s->pb, 1, s->intra_vlc_format); 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->flags & CODEC_FLAG_SVCD_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 == CODEC_ID_MPEG1VIDEO)) && ((s->pict_type == FF_P_TYPE && (motion_x | motion_y) == 0) || (s->pict_type == FF_B_TYPE && 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 == FF_P_TYPE){ 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){ 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 == FF_I_TYPE) { 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 == FF_P_TYPE) { 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{ 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]= 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 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 */ int l= INT_BIT - 5 - bit_size; val= (val<<l)>>l; 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); } } } 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; init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]); 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, range, code; bit_size = f_code - 1; range = 1 << bit_size; 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 == 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: #if 0 if (level != 0) dprintf(s->avctx, "level[%d]=%d\n", i, level); #endif /* 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 == 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]); } AVCodec mpeg1video_encoder = { "mpeg1video", AVMEDIA_TYPE_VIDEO, CODEC_ID_MPEG1VIDEO, sizeof(MpegEncContext), encode_init, MPV_encode_picture, MPV_encode_end, .supported_framerates= ff_frame_rate_tab+1, .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE}, .capabilities= CODEC_CAP_DELAY, .long_name= NULL_IF_CONFIG_SMALL("MPEG-1 video"), }; AVCodec mpeg2video_encoder = { "mpeg2video", AVMEDIA_TYPE_VIDEO, CODEC_ID_MPEG2VIDEO, sizeof(MpegEncContext), encode_init, MPV_encode_picture, MPV_encode_end, .supported_framerates= ff_frame_rate_tab+1, .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE}, .capabilities= CODEC_CAP_DELAY, .long_name= NULL_IF_CONFIG_SMALL("MPEG-2 video"), };