yading@10: /* yading@10: * ITU H263 bitstream encoder yading@10: * Copyright (c) 2000,2001 Fabrice Bellard yading@10: * H263+ support. yading@10: * Copyright (c) 2001 Juan J. Sierralta P yading@10: * Copyright (c) 2002-2004 Michael Niedermayer yading@10: * yading@10: * This file is part of FFmpeg. yading@10: * yading@10: * FFmpeg is free software; you can redistribute it and/or yading@10: * modify it under the terms of the GNU Lesser General Public yading@10: * License as published by the Free Software Foundation; either yading@10: * version 2.1 of the License, or (at your option) any later version. yading@10: * yading@10: * FFmpeg is distributed in the hope that it will be useful, yading@10: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@10: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@10: * Lesser General Public License for more details. yading@10: * yading@10: * You should have received a copy of the GNU Lesser General Public yading@10: * License along with FFmpeg; if not, write to the Free Software yading@10: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@10: */ yading@10: yading@10: /** yading@10: * @file yading@10: * h263 bitstream encoder. yading@10: */ yading@10: yading@10: //#define DEBUG yading@10: #include yading@10: yading@10: #include "avcodec.h" yading@10: #include "mpegvideo.h" yading@10: #include "h263.h" yading@10: #include "mathops.h" yading@10: #include "unary.h" yading@10: #include "flv.h" yading@10: #include "mpeg4video.h" yading@10: #include "internal.h" yading@10: yading@10: /** yading@10: * Table of number of bits a motion vector component needs. yading@10: */ yading@10: static uint8_t mv_penalty[MAX_FCODE+1][MAX_MV*2+1]; yading@10: yading@10: /** yading@10: * Minimal fcode that a motion vector component would need. yading@10: */ yading@10: static uint8_t fcode_tab[MAX_MV*2+1]; yading@10: yading@10: /** yading@10: * Minimal fcode that a motion vector component would need in umv. yading@10: * All entries in this table are 1. yading@10: */ yading@10: static uint8_t umv_fcode_tab[MAX_MV*2+1]; yading@10: yading@10: //unified encoding tables for run length encoding of coefficients yading@10: //unified in the sense that the specification specifies the encoding in several steps. yading@10: static uint8_t uni_h263_intra_aic_rl_len [64*64*2*2]; yading@10: static uint8_t uni_h263_inter_rl_len [64*64*2*2]; yading@10: //#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128 + (run)*256 + (level)) yading@10: //#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run) + (level)*64) yading@10: #define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run)*128 + (level)) yading@10: yading@10: static const uint8_t wrong_run[102] = { yading@10: 1, 2, 3, 5, 4, 10, 9, 8, yading@10: 11, 15, 17, 16, 23, 22, 21, 20, yading@10: 19, 18, 25, 24, 27, 26, 11, 7, yading@10: 6, 1, 2, 13, 2, 2, 2, 2, yading@10: 6, 12, 3, 9, 1, 3, 4, 3, yading@10: 7, 4, 1, 1, 5, 5, 14, 6, yading@10: 1, 7, 1, 8, 1, 1, 1, 1, yading@10: 10, 1, 1, 5, 9, 17, 25, 24, yading@10: 29, 33, 32, 41, 2, 23, 28, 31, yading@10: 3, 22, 30, 4, 27, 40, 8, 26, yading@10: 6, 39, 7, 38, 16, 37, 15, 10, yading@10: 11, 12, 13, 14, 1, 21, 20, 18, yading@10: 19, 2, 1, 34, 35, 36 yading@10: }; yading@10: yading@10: /** yading@10: * Return the 4 bit value that specifies the given aspect ratio. yading@10: * This may be one of the standard aspect ratios or it specifies yading@10: * that the aspect will be stored explicitly later. yading@10: */ yading@10: av_const int ff_h263_aspect_to_info(AVRational aspect){ yading@10: int i; yading@10: yading@10: if(aspect.num==0) aspect= (AVRational){1,1}; yading@10: yading@10: for(i=1; i<6; i++){ yading@10: if(av_cmp_q(ff_h263_pixel_aspect[i], aspect) == 0){ yading@10: return i; yading@10: } yading@10: } yading@10: yading@10: return FF_ASPECT_EXTENDED; yading@10: } yading@10: yading@10: void ff_h263_encode_picture_header(MpegEncContext * s, int picture_number) yading@10: { yading@10: int format, coded_frame_rate, coded_frame_rate_base, i, temp_ref; yading@10: int best_clock_code=1; yading@10: int best_divisor=60; yading@10: int best_error= INT_MAX; yading@10: yading@10: if(s->h263_plus){ yading@10: for(i=0; i<2; i++){ yading@10: int div, error; yading@10: div= (s->avctx->time_base.num*1800000LL + 500LL*s->avctx->time_base.den) / ((1000LL+i)*s->avctx->time_base.den); yading@10: div= av_clip(div, 1, 127); yading@10: error= FFABS(s->avctx->time_base.num*1800000LL - (1000LL+i)*s->avctx->time_base.den*div); yading@10: if(error < best_error){ yading@10: best_error= error; yading@10: best_divisor= div; yading@10: best_clock_code= i; yading@10: } yading@10: } yading@10: } yading@10: s->custom_pcf= best_clock_code!=1 || best_divisor!=60; yading@10: coded_frame_rate= 1800000; yading@10: coded_frame_rate_base= (1000+best_clock_code)*best_divisor; yading@10: yading@10: avpriv_align_put_bits(&s->pb); yading@10: yading@10: /* Update the pointer to last GOB */ yading@10: s->ptr_lastgob = put_bits_ptr(&s->pb); yading@10: put_bits(&s->pb, 22, 0x20); /* PSC */ yading@10: temp_ref= s->picture_number * (int64_t)coded_frame_rate * s->avctx->time_base.num / //FIXME use timestamp yading@10: (coded_frame_rate_base * (int64_t)s->avctx->time_base.den); yading@10: put_sbits(&s->pb, 8, temp_ref); /* TemporalReference */ yading@10: yading@10: put_bits(&s->pb, 1, 1); /* marker */ yading@10: put_bits(&s->pb, 1, 0); /* h263 id */ yading@10: put_bits(&s->pb, 1, 0); /* split screen off */ yading@10: put_bits(&s->pb, 1, 0); /* camera off */ yading@10: put_bits(&s->pb, 1, 0); /* freeze picture release off */ yading@10: yading@10: format = ff_match_2uint16(ff_h263_format, FF_ARRAY_ELEMS(ff_h263_format), s->width, s->height); yading@10: if (!s->h263_plus) { yading@10: /* H.263v1 */ yading@10: put_bits(&s->pb, 3, format); yading@10: put_bits(&s->pb, 1, (s->pict_type == AV_PICTURE_TYPE_P)); yading@10: /* By now UMV IS DISABLED ON H.263v1, since the restrictions yading@10: of H.263v1 UMV implies to check the predicted MV after yading@10: calculation of the current MB to see if we're on the limits */ yading@10: put_bits(&s->pb, 1, 0); /* Unrestricted Motion Vector: off */ yading@10: put_bits(&s->pb, 1, 0); /* SAC: off */ yading@10: put_bits(&s->pb, 1, s->obmc); /* Advanced Prediction */ yading@10: put_bits(&s->pb, 1, 0); /* only I/P frames, no PB frame */ yading@10: put_bits(&s->pb, 5, s->qscale); yading@10: put_bits(&s->pb, 1, 0); /* Continuous Presence Multipoint mode: off */ yading@10: } else { yading@10: int ufep=1; yading@10: /* H.263v2 */ yading@10: /* H.263 Plus PTYPE */ yading@10: yading@10: put_bits(&s->pb, 3, 7); yading@10: put_bits(&s->pb,3,ufep); /* Update Full Extended PTYPE */ yading@10: if (format == 8) yading@10: put_bits(&s->pb,3,6); /* Custom Source Format */ yading@10: else yading@10: put_bits(&s->pb, 3, format); yading@10: yading@10: put_bits(&s->pb,1, s->custom_pcf); yading@10: put_bits(&s->pb,1, s->umvplus); /* Unrestricted Motion Vector */ yading@10: put_bits(&s->pb,1,0); /* SAC: off */ yading@10: put_bits(&s->pb,1,s->obmc); /* Advanced Prediction Mode */ yading@10: put_bits(&s->pb,1,s->h263_aic); /* Advanced Intra Coding */ yading@10: put_bits(&s->pb,1,s->loop_filter); /* Deblocking Filter */ yading@10: put_bits(&s->pb,1,s->h263_slice_structured); /* Slice Structured */ yading@10: put_bits(&s->pb,1,0); /* Reference Picture Selection: off */ yading@10: put_bits(&s->pb,1,0); /* Independent Segment Decoding: off */ yading@10: put_bits(&s->pb,1,s->alt_inter_vlc); /* Alternative Inter VLC */ yading@10: put_bits(&s->pb,1,s->modified_quant); /* Modified Quantization: */ yading@10: put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */ yading@10: put_bits(&s->pb,3,0); /* Reserved */ yading@10: yading@10: put_bits(&s->pb, 3, s->pict_type == AV_PICTURE_TYPE_P); yading@10: yading@10: put_bits(&s->pb,1,0); /* Reference Picture Resampling: off */ yading@10: put_bits(&s->pb,1,0); /* Reduced-Resolution Update: off */ yading@10: put_bits(&s->pb,1,s->no_rounding); /* Rounding Type */ yading@10: put_bits(&s->pb,2,0); /* Reserved */ yading@10: put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */ yading@10: yading@10: /* This should be here if PLUSPTYPE */ yading@10: put_bits(&s->pb, 1, 0); /* Continuous Presence Multipoint mode: off */ yading@10: yading@10: if (format == 8) { yading@10: /* Custom Picture Format (CPFMT) */ yading@10: s->aspect_ratio_info= ff_h263_aspect_to_info(s->avctx->sample_aspect_ratio); yading@10: yading@10: put_bits(&s->pb,4,s->aspect_ratio_info); yading@10: put_bits(&s->pb,9,(s->width >> 2) - 1); yading@10: put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */ yading@10: put_bits(&s->pb,9,(s->height >> 2)); yading@10: if (s->aspect_ratio_info == FF_ASPECT_EXTENDED){ yading@10: put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num); yading@10: put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den); yading@10: } yading@10: } yading@10: if(s->custom_pcf){ yading@10: if(ufep){ yading@10: put_bits(&s->pb, 1, best_clock_code); yading@10: put_bits(&s->pb, 7, best_divisor); yading@10: } yading@10: put_sbits(&s->pb, 2, temp_ref>>8); yading@10: } yading@10: yading@10: /* Unlimited Unrestricted Motion Vectors Indicator (UUI) */ yading@10: if (s->umvplus) yading@10: // put_bits(&s->pb,1,1); /* Limited according tables of Annex D */ yading@10: //FIXME check actual requested range yading@10: put_bits(&s->pb,2,1); /* unlimited */ yading@10: if(s->h263_slice_structured) yading@10: put_bits(&s->pb,2,0); /* no weird submodes */ yading@10: yading@10: put_bits(&s->pb, 5, s->qscale); yading@10: } yading@10: yading@10: put_bits(&s->pb, 1, 0); /* no PEI */ yading@10: yading@10: if(s->h263_slice_structured){ yading@10: put_bits(&s->pb, 1, 1); yading@10: yading@10: av_assert1(s->mb_x == 0 && s->mb_y == 0); yading@10: ff_h263_encode_mba(s); yading@10: yading@10: put_bits(&s->pb, 1, 1); yading@10: } yading@10: yading@10: if(s->h263_aic){ yading@10: s->y_dc_scale_table= yading@10: s->c_dc_scale_table= ff_aic_dc_scale_table; yading@10: }else{ yading@10: s->y_dc_scale_table= yading@10: s->c_dc_scale_table= ff_mpeg1_dc_scale_table; yading@10: } yading@10: } yading@10: yading@10: /** yading@10: * Encode a group of blocks header. yading@10: */ yading@10: void ff_h263_encode_gob_header(MpegEncContext * s, int mb_line) yading@10: { yading@10: put_bits(&s->pb, 17, 1); /* GBSC */ yading@10: yading@10: if(s->h263_slice_structured){ yading@10: put_bits(&s->pb, 1, 1); yading@10: yading@10: ff_h263_encode_mba(s); yading@10: yading@10: if(s->mb_num > 1583) yading@10: put_bits(&s->pb, 1, 1); yading@10: put_bits(&s->pb, 5, s->qscale); /* GQUANT */ yading@10: put_bits(&s->pb, 1, 1); yading@10: put_bits(&s->pb, 2, s->pict_type == AV_PICTURE_TYPE_I); /* GFID */ yading@10: }else{ yading@10: int gob_number= mb_line / s->gob_index; yading@10: yading@10: put_bits(&s->pb, 5, gob_number); /* GN */ yading@10: put_bits(&s->pb, 2, s->pict_type == AV_PICTURE_TYPE_I); /* GFID */ yading@10: put_bits(&s->pb, 5, s->qscale); /* GQUANT */ yading@10: } yading@10: } yading@10: yading@10: /** yading@10: * modify qscale so that encoding is actually possible in h263 (limit difference to -2..2) yading@10: */ yading@10: void ff_clean_h263_qscales(MpegEncContext *s){ yading@10: int i; yading@10: int8_t * const qscale_table = s->current_picture.qscale_table; yading@10: yading@10: ff_init_qscale_tab(s); yading@10: yading@10: for(i=1; imb_num; i++){ yading@10: if(qscale_table[ s->mb_index2xy[i] ] - qscale_table[ s->mb_index2xy[i-1] ] >2) yading@10: qscale_table[ s->mb_index2xy[i] ]= qscale_table[ s->mb_index2xy[i-1] ]+2; yading@10: } yading@10: for(i=s->mb_num-2; i>=0; i--){ yading@10: if(qscale_table[ s->mb_index2xy[i] ] - qscale_table[ s->mb_index2xy[i+1] ] >2) yading@10: qscale_table[ s->mb_index2xy[i] ]= qscale_table[ s->mb_index2xy[i+1] ]+2; yading@10: } yading@10: yading@10: if(s->codec_id != AV_CODEC_ID_H263P){ yading@10: for(i=1; imb_num; i++){ yading@10: int mb_xy= s->mb_index2xy[i]; yading@10: yading@10: if(qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i-1]] && (s->mb_type[mb_xy]&CANDIDATE_MB_TYPE_INTER4V)){ yading@10: s->mb_type[mb_xy]|= CANDIDATE_MB_TYPE_INTER; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: yading@10: static const int dquant_code[5]= {1,0,9,2,3}; yading@10: yading@10: /** yading@10: * Encode an 8x8 block. yading@10: * @param block the 8x8 block yading@10: * @param n block index (0-3 are luma, 4-5 are chroma) yading@10: */ yading@10: static void h263_encode_block(MpegEncContext * s, int16_t * block, int n) yading@10: { yading@10: int level, run, last, i, j, last_index, last_non_zero, sign, slevel, code; yading@10: RLTable *rl; yading@10: yading@10: rl = &ff_h263_rl_inter; yading@10: if (s->mb_intra && !s->h263_aic) { yading@10: /* DC coef */ yading@10: level = block[0]; yading@10: /* 255 cannot be represented, so we clamp */ yading@10: if (level > 254) { yading@10: level = 254; yading@10: block[0] = 254; yading@10: } yading@10: /* 0 cannot be represented also */ yading@10: else if (level < 1) { yading@10: level = 1; yading@10: block[0] = 1; yading@10: } yading@10: if (level == 128) //FIXME check rv10 yading@10: put_bits(&s->pb, 8, 0xff); yading@10: else yading@10: put_bits(&s->pb, 8, level); yading@10: i = 1; yading@10: } else { yading@10: i = 0; yading@10: if (s->h263_aic && s->mb_intra) yading@10: rl = &ff_rl_intra_aic; yading@10: yading@10: if(s->alt_inter_vlc && !s->mb_intra){ yading@10: int aic_vlc_bits=0; yading@10: int inter_vlc_bits=0; yading@10: int wrong_pos=-1; yading@10: int aic_code; yading@10: yading@10: last_index = s->block_last_index[n]; yading@10: last_non_zero = i - 1; yading@10: for (; i <= last_index; i++) { yading@10: j = s->intra_scantable.permutated[i]; yading@10: level = block[j]; yading@10: if (level) { yading@10: run = i - last_non_zero - 1; yading@10: last = (i == last_index); yading@10: yading@10: if(level<0) level= -level; yading@10: yading@10: code = get_rl_index(rl, last, run, level); yading@10: aic_code = get_rl_index(&ff_rl_intra_aic, last, run, level); yading@10: inter_vlc_bits += rl->table_vlc[code][1]+1; yading@10: aic_vlc_bits += ff_rl_intra_aic.table_vlc[aic_code][1]+1; yading@10: yading@10: if (code == rl->n) { yading@10: inter_vlc_bits += 1+6+8-1; yading@10: } yading@10: if (aic_code == ff_rl_intra_aic.n) { yading@10: aic_vlc_bits += 1+6+8-1; yading@10: wrong_pos += run + 1; yading@10: }else yading@10: wrong_pos += wrong_run[aic_code]; yading@10: last_non_zero = i; yading@10: } yading@10: } yading@10: i = 0; yading@10: if(aic_vlc_bits < inter_vlc_bits && wrong_pos > 63) yading@10: rl = &ff_rl_intra_aic; yading@10: } yading@10: } yading@10: yading@10: /* AC coefs */ yading@10: last_index = s->block_last_index[n]; yading@10: last_non_zero = i - 1; yading@10: for (; i <= last_index; i++) { yading@10: j = s->intra_scantable.permutated[i]; yading@10: level = block[j]; yading@10: if (level) { yading@10: run = i - last_non_zero - 1; yading@10: last = (i == last_index); yading@10: sign = 0; yading@10: slevel = level; yading@10: if (level < 0) { yading@10: sign = 1; yading@10: level = -level; yading@10: } yading@10: code = get_rl_index(rl, last, run, level); yading@10: put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]); yading@10: if (code == rl->n) { yading@10: if(!CONFIG_FLV_ENCODER || s->h263_flv <= 1){ yading@10: put_bits(&s->pb, 1, last); yading@10: put_bits(&s->pb, 6, run); yading@10: yading@10: av_assert2(slevel != 0); yading@10: yading@10: if(level < 128) yading@10: put_sbits(&s->pb, 8, slevel); yading@10: else{ yading@10: put_bits(&s->pb, 8, 128); yading@10: put_sbits(&s->pb, 5, slevel); yading@10: put_sbits(&s->pb, 6, slevel>>5); yading@10: } yading@10: }else{ yading@10: ff_flv2_encode_ac_esc(&s->pb, slevel, level, run, last); yading@10: } yading@10: } else { yading@10: put_bits(&s->pb, 1, sign); yading@10: } yading@10: last_non_zero = i; yading@10: } yading@10: } yading@10: } yading@10: yading@10: /* Encode MV differences on H.263+ with Unrestricted MV mode */ yading@10: static void h263p_encode_umotion(MpegEncContext * s, int val) yading@10: { yading@10: short sval = 0; yading@10: short i = 0; yading@10: short n_bits = 0; yading@10: short temp_val; yading@10: int code = 0; yading@10: int tcode; yading@10: yading@10: if ( val == 0) yading@10: put_bits(&s->pb, 1, 1); yading@10: else if (val == 1) yading@10: put_bits(&s->pb, 3, 0); yading@10: else if (val == -1) yading@10: put_bits(&s->pb, 3, 2); yading@10: else { yading@10: yading@10: sval = ((val < 0) ? (short)(-val):(short)val); yading@10: temp_val = sval; yading@10: yading@10: while (temp_val != 0) { yading@10: temp_val = temp_val >> 1; yading@10: n_bits++; yading@10: } yading@10: yading@10: i = n_bits - 1; yading@10: while (i > 0) { yading@10: tcode = (sval & (1 << (i-1))) >> (i-1); yading@10: tcode = (tcode << 1) | 1; yading@10: code = (code << 2) | tcode; yading@10: i--; yading@10: } yading@10: code = ((code << 1) | (val < 0)) << 1; yading@10: put_bits(&s->pb, (2*n_bits)+1, code); yading@10: } yading@10: } yading@10: yading@10: void ff_h263_encode_mb(MpegEncContext * s, yading@10: int16_t block[6][64], yading@10: int motion_x, int motion_y) yading@10: { yading@10: int cbpc, cbpy, i, cbp, pred_x, pred_y; yading@10: int16_t pred_dc; yading@10: int16_t rec_intradc[6]; yading@10: int16_t *dc_ptr[6]; yading@10: const int interleaved_stats= (s->flags&CODEC_FLAG_PASS1); yading@10: yading@10: if (!s->mb_intra) { yading@10: /* compute cbp */ yading@10: cbp= get_p_cbp(s, block, motion_x, motion_y); yading@10: yading@10: if ((cbp | motion_x | motion_y | s->dquant | (s->mv_type - MV_TYPE_16X16)) == 0) { yading@10: /* skip macroblock */ yading@10: put_bits(&s->pb, 1, 1); yading@10: if(interleaved_stats){ yading@10: s->misc_bits++; yading@10: s->last_bits++; yading@10: } yading@10: s->skip_count++; yading@10: yading@10: return; yading@10: } yading@10: put_bits(&s->pb, 1, 0); /* mb coded */ yading@10: yading@10: cbpc = cbp & 3; yading@10: cbpy = cbp >> 2; yading@10: if(s->alt_inter_vlc==0 || cbpc!=3) yading@10: cbpy ^= 0xF; yading@10: if(s->dquant) cbpc+= 8; yading@10: if(s->mv_type==MV_TYPE_16X16){ yading@10: put_bits(&s->pb, yading@10: ff_h263_inter_MCBPC_bits[cbpc], yading@10: ff_h263_inter_MCBPC_code[cbpc]); yading@10: yading@10: put_bits(&s->pb, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); yading@10: if(s->dquant) yading@10: put_bits(&s->pb, 2, dquant_code[s->dquant+2]); yading@10: yading@10: if(interleaved_stats){ yading@10: s->misc_bits+= get_bits_diff(s); yading@10: } yading@10: yading@10: /* motion vectors: 16x16 mode */ yading@10: ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); yading@10: yading@10: if (!s->umvplus) { yading@10: ff_h263_encode_motion_vector(s, motion_x - pred_x, yading@10: motion_y - pred_y, 1); yading@10: } yading@10: else { yading@10: h263p_encode_umotion(s, motion_x - pred_x); yading@10: h263p_encode_umotion(s, motion_y - pred_y); yading@10: if (((motion_x - pred_x) == 1) && ((motion_y - pred_y) == 1)) yading@10: /* To prevent Start Code emulation */ yading@10: put_bits(&s->pb,1,1); yading@10: } yading@10: }else{ yading@10: put_bits(&s->pb, yading@10: ff_h263_inter_MCBPC_bits[cbpc+16], yading@10: ff_h263_inter_MCBPC_code[cbpc+16]); yading@10: put_bits(&s->pb, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); yading@10: if(s->dquant) yading@10: put_bits(&s->pb, 2, dquant_code[s->dquant+2]); yading@10: yading@10: if(interleaved_stats){ yading@10: s->misc_bits+= get_bits_diff(s); yading@10: } yading@10: yading@10: for(i=0; i<4; i++){ yading@10: /* motion vectors: 8x8 mode*/ yading@10: ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y); yading@10: yading@10: motion_x = s->current_picture.motion_val[0][s->block_index[i]][0]; yading@10: motion_y = s->current_picture.motion_val[0][s->block_index[i]][1]; yading@10: if (!s->umvplus) { yading@10: ff_h263_encode_motion_vector(s, motion_x - pred_x, yading@10: motion_y - pred_y, 1); yading@10: } yading@10: else { yading@10: h263p_encode_umotion(s, motion_x - pred_x); yading@10: h263p_encode_umotion(s, motion_y - pred_y); yading@10: if (((motion_x - pred_x) == 1) && ((motion_y - pred_y) == 1)) yading@10: /* To prevent Start Code emulation */ yading@10: put_bits(&s->pb,1,1); yading@10: } yading@10: } yading@10: } yading@10: yading@10: if(interleaved_stats){ yading@10: s->mv_bits+= get_bits_diff(s); yading@10: } yading@10: } else { yading@10: av_assert2(s->mb_intra); yading@10: yading@10: cbp = 0; yading@10: if (s->h263_aic) { yading@10: /* Predict DC */ yading@10: for(i=0; i<6; i++) { yading@10: int16_t level = block[i][0]; yading@10: int scale; yading@10: yading@10: if(i<4) scale= s->y_dc_scale; yading@10: else scale= s->c_dc_scale; yading@10: yading@10: pred_dc = ff_h263_pred_dc(s, i, &dc_ptr[i]); yading@10: level -= pred_dc; yading@10: /* Quant */ yading@10: if (level >= 0) yading@10: level = (level + (scale>>1))/scale; yading@10: else yading@10: level = (level - (scale>>1))/scale; yading@10: yading@10: /* AIC can change CBP */ yading@10: if (level == 0 && s->block_last_index[i] == 0) yading@10: s->block_last_index[i] = -1; yading@10: yading@10: if(!s->modified_quant){ yading@10: if (level < -127) yading@10: level = -127; yading@10: else if (level > 127) yading@10: level = 127; yading@10: } yading@10: yading@10: block[i][0] = level; yading@10: /* Reconstruction */ yading@10: rec_intradc[i] = scale*level + pred_dc; yading@10: /* Oddify */ yading@10: rec_intradc[i] |= 1; yading@10: //if ((rec_intradc[i] % 2) == 0) yading@10: // rec_intradc[i]++; yading@10: /* Clipping */ yading@10: if (rec_intradc[i] < 0) yading@10: rec_intradc[i] = 0; yading@10: else if (rec_intradc[i] > 2047) yading@10: rec_intradc[i] = 2047; yading@10: yading@10: /* Update AC/DC tables */ yading@10: *dc_ptr[i] = rec_intradc[i]; yading@10: if (s->block_last_index[i] >= 0) yading@10: cbp |= 1 << (5 - i); yading@10: } yading@10: }else{ yading@10: for(i=0; i<6; i++) { yading@10: /* compute cbp */ yading@10: if (s->block_last_index[i] >= 1) yading@10: cbp |= 1 << (5 - i); yading@10: } yading@10: } yading@10: yading@10: cbpc = cbp & 3; yading@10: if (s->pict_type == AV_PICTURE_TYPE_I) { yading@10: if(s->dquant) cbpc+=4; yading@10: put_bits(&s->pb, yading@10: ff_h263_intra_MCBPC_bits[cbpc], yading@10: ff_h263_intra_MCBPC_code[cbpc]); yading@10: } else { yading@10: if(s->dquant) cbpc+=8; yading@10: put_bits(&s->pb, 1, 0); /* mb coded */ yading@10: put_bits(&s->pb, yading@10: ff_h263_inter_MCBPC_bits[cbpc + 4], yading@10: ff_h263_inter_MCBPC_code[cbpc + 4]); yading@10: } yading@10: if (s->h263_aic) { yading@10: /* XXX: currently, we do not try to use ac prediction */ yading@10: put_bits(&s->pb, 1, 0); /* no AC prediction */ yading@10: } yading@10: cbpy = cbp >> 2; yading@10: put_bits(&s->pb, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); yading@10: if(s->dquant) yading@10: put_bits(&s->pb, 2, dquant_code[s->dquant+2]); yading@10: yading@10: if(interleaved_stats){ yading@10: s->misc_bits+= get_bits_diff(s); yading@10: } yading@10: } yading@10: yading@10: for(i=0; i<6; i++) { yading@10: /* encode each block */ yading@10: h263_encode_block(s, block[i], i); yading@10: yading@10: /* Update INTRADC for decoding */ yading@10: if (s->h263_aic && s->mb_intra) { yading@10: block[i][0] = rec_intradc[i]; yading@10: yading@10: } yading@10: } yading@10: yading@10: if(interleaved_stats){ yading@10: if (!s->mb_intra) { yading@10: s->p_tex_bits+= get_bits_diff(s); yading@10: s->f_count++; yading@10: }else{ yading@10: s->i_tex_bits+= get_bits_diff(s); yading@10: s->i_count++; yading@10: } yading@10: } yading@10: } yading@10: yading@10: void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code) yading@10: { yading@10: int range, bit_size, sign, code, bits; yading@10: yading@10: if (val == 0) { yading@10: /* zero vector */ yading@10: code = 0; yading@10: put_bits(&s->pb, ff_mvtab[code][1], ff_mvtab[code][0]); yading@10: } else { yading@10: bit_size = f_code - 1; yading@10: range = 1 << bit_size; yading@10: /* modulo encoding */ yading@10: val = sign_extend(val, 6 + bit_size); yading@10: sign = val>>31; yading@10: val= (val^sign)-sign; yading@10: sign&=1; yading@10: yading@10: val--; yading@10: code = (val >> bit_size) + 1; yading@10: bits = val & (range - 1); yading@10: yading@10: put_bits(&s->pb, ff_mvtab[code][1] + 1, (ff_mvtab[code][0] << 1) | sign); yading@10: if (bit_size > 0) { yading@10: put_bits(&s->pb, bit_size, bits); yading@10: } yading@10: } yading@10: } yading@10: yading@10: static void init_mv_penalty_and_fcode(MpegEncContext *s) yading@10: { yading@10: int f_code; yading@10: int mv; yading@10: yading@10: for(f_code=1; f_code<=MAX_FCODE; f_code++){ yading@10: for(mv=-MAX_MV; mv<=MAX_MV; mv++){ yading@10: int len; yading@10: yading@10: if(mv==0) len= ff_mvtab[0][1]; yading@10: else{ yading@10: int val, bit_size, code; yading@10: yading@10: bit_size = f_code - 1; yading@10: yading@10: val=mv; yading@10: if (val < 0) yading@10: val = -val; yading@10: val--; yading@10: code = (val >> bit_size) + 1; yading@10: if(code<33){ yading@10: len= ff_mvtab[code][1] + 1 + bit_size; yading@10: }else{ yading@10: len= ff_mvtab[32][1] + av_log2(code>>5) + 2 + bit_size; yading@10: } yading@10: } yading@10: yading@10: mv_penalty[f_code][mv+MAX_MV]= len; yading@10: } yading@10: } yading@10: yading@10: for(f_code=MAX_FCODE; f_code>0; f_code--){ yading@10: for(mv=-(16<= 64); yading@10: av_assert0(MAX_RUN >= 63); yading@10: yading@10: for(slevel=-64; slevel<64; slevel++){ yading@10: if(slevel==0) continue; yading@10: for(run=0; run<64; run++){ yading@10: for(last=0; last<=1; last++){ yading@10: const int index= UNI_MPEG4_ENC_INDEX(last, run, slevel+64); yading@10: int level= slevel < 0 ? -slevel : slevel; yading@10: int sign= slevel < 0 ? 1 : 0; yading@10: int bits, len, code; yading@10: yading@10: len_tab[index]= 100; yading@10: yading@10: /* ESC0 */ yading@10: code= get_rl_index(rl, last, run, level); yading@10: bits= rl->table_vlc[code][0]; yading@10: len= rl->table_vlc[code][1]; yading@10: bits=bits*2+sign; len++; yading@10: yading@10: if(code!=rl->n && len < len_tab[index]){ yading@10: if(bits_tab) bits_tab[index]= bits; yading@10: len_tab [index]= len; yading@10: } yading@10: /* ESC */ yading@10: bits= rl->table_vlc[rl->n][0]; yading@10: len = rl->table_vlc[rl->n][1]; yading@10: bits=bits*2+last; len++; yading@10: bits=bits*64+run; len+=6; yading@10: bits=bits*256+(level&0xff); len+=8; yading@10: yading@10: if(len < len_tab[index]){ yading@10: if(bits_tab) bits_tab[index]= bits; yading@10: len_tab [index]= len; yading@10: } yading@10: } yading@10: } yading@10: } yading@10: } yading@10: yading@10: void ff_h263_encode_init(MpegEncContext *s) yading@10: { yading@10: static int done = 0; yading@10: yading@10: if (!done) { yading@10: done = 1; yading@10: yading@10: ff_init_rl(&ff_h263_rl_inter, ff_h263_static_rl_table_store[0]); yading@10: ff_init_rl(&ff_rl_intra_aic, ff_h263_static_rl_table_store[1]); yading@10: yading@10: init_uni_h263_rl_tab(&ff_rl_intra_aic, NULL, uni_h263_intra_aic_rl_len); yading@10: init_uni_h263_rl_tab(&ff_h263_rl_inter , NULL, uni_h263_inter_rl_len); yading@10: yading@10: init_mv_penalty_and_fcode(s); yading@10: } yading@10: s->me.mv_penalty= mv_penalty; //FIXME exact table for msmpeg4 & h263p yading@10: yading@10: s->intra_ac_vlc_length =s->inter_ac_vlc_length = uni_h263_inter_rl_len; yading@10: s->intra_ac_vlc_last_length=s->inter_ac_vlc_last_length= uni_h263_inter_rl_len + 128*64; yading@10: if(s->h263_aic){ yading@10: s->intra_ac_vlc_length = uni_h263_intra_aic_rl_len; yading@10: s->intra_ac_vlc_last_length= uni_h263_intra_aic_rl_len + 128*64; yading@10: } yading@10: s->ac_esc_length= 7+1+6+8; yading@10: yading@10: // use fcodes >1 only for mpeg4 & h263 & h263p FIXME yading@10: switch(s->codec_id){ yading@10: case AV_CODEC_ID_MPEG4: yading@10: s->fcode_tab= fcode_tab; yading@10: break; yading@10: case AV_CODEC_ID_H263P: yading@10: if(s->umvplus) yading@10: s->fcode_tab= umv_fcode_tab; yading@10: if(s->modified_quant){ yading@10: s->min_qcoeff= -2047; yading@10: s->max_qcoeff= 2047; yading@10: }else{ yading@10: s->min_qcoeff= -127; yading@10: s->max_qcoeff= 127; yading@10: } yading@10: break; yading@10: //Note for mpeg4 & h263 the dc-scale table will be set per frame as needed later yading@10: case AV_CODEC_ID_FLV1: yading@10: if (s->h263_flv > 1) { yading@10: s->min_qcoeff= -1023; yading@10: s->max_qcoeff= 1023; yading@10: } else { yading@10: s->min_qcoeff= -127; yading@10: s->max_qcoeff= 127; yading@10: } yading@10: s->y_dc_scale_table= yading@10: s->c_dc_scale_table= ff_mpeg1_dc_scale_table; yading@10: break; yading@10: default: //nothing needed - default table already set in mpegvideo.c yading@10: s->min_qcoeff= -127; yading@10: s->max_qcoeff= 127; yading@10: s->y_dc_scale_table= yading@10: s->c_dc_scale_table= ff_mpeg1_dc_scale_table; yading@10: } yading@10: } yading@10: yading@10: void ff_h263_encode_mba(MpegEncContext *s) yading@10: { yading@10: int i, mb_pos; yading@10: yading@10: for(i=0; i<6; i++){ yading@10: if(s->mb_num-1 <= ff_mba_max[i]) break; yading@10: } yading@10: mb_pos= s->mb_x + s->mb_width*s->mb_y; yading@10: put_bits(&s->pb, ff_mba_length[i], mb_pos); yading@10: }