| /* |
| * ITU H.263 bitstream encoder |
| * Copyright (c) 2000,2001 Fabrice Bellard |
| * H.263+ support. |
| * Copyright (c) 2001 Juan J. Sierralta P |
| * 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 |
| * H.263 bitstream encoder. |
| */ |
| |
| #include <limits.h> |
| |
| #include "libavutil/attributes.h" |
| #include "avcodec.h" |
| #include "mpegvideo.h" |
| #include "mpegvideodata.h" |
| #include "h263.h" |
| #include "h263data.h" |
| #include "mathops.h" |
| #include "mpegutils.h" |
| #include "flv.h" |
| #include "mpeg4video.h" |
| #include "internal.h" |
| |
| /** |
| * Table of number of bits a motion vector component needs. |
| */ |
| static uint8_t mv_penalty[MAX_FCODE+1][MAX_DMV*2+1]; |
| |
| /** |
| * Minimal fcode that a motion vector component would need. |
| */ |
| static uint8_t fcode_tab[MAX_MV*2+1]; |
| |
| /** |
| * Minimal fcode that a motion vector component would need in umv. |
| * All entries in this table are 1. |
| */ |
| static uint8_t umv_fcode_tab[MAX_MV*2+1]; |
| |
| //unified encoding tables for run length encoding of coefficients |
| //unified in the sense that the specification specifies the encoding in several steps. |
| static uint8_t uni_h263_intra_aic_rl_len [64*64*2*2]; |
| static uint8_t uni_h263_inter_rl_len [64*64*2*2]; |
| //#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128 + (run)*256 + (level)) |
| //#define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run) + (level)*64) |
| #define UNI_MPEG4_ENC_INDEX(last,run,level) ((last)*128*64 + (run)*128 + (level)) |
| |
| static const uint8_t wrong_run[102] = { |
| 1, 2, 3, 5, 4, 10, 9, 8, |
| 11, 15, 17, 16, 23, 22, 21, 20, |
| 19, 18, 25, 24, 27, 26, 11, 7, |
| 6, 1, 2, 13, 2, 2, 2, 2, |
| 6, 12, 3, 9, 1, 3, 4, 3, |
| 7, 4, 1, 1, 5, 5, 14, 6, |
| 1, 7, 1, 8, 1, 1, 1, 1, |
| 10, 1, 1, 5, 9, 17, 25, 24, |
| 29, 33, 32, 41, 2, 23, 28, 31, |
| 3, 22, 30, 4, 27, 40, 8, 26, |
| 6, 39, 7, 38, 16, 37, 15, 10, |
| 11, 12, 13, 14, 1, 21, 20, 18, |
| 19, 2, 1, 34, 35, 36 |
| }; |
| |
| /** |
| * Return the 4 bit value that specifies the given aspect ratio. |
| * This may be one of the standard aspect ratios or it specifies |
| * that the aspect will be stored explicitly later. |
| */ |
| av_const int ff_h263_aspect_to_info(AVRational aspect){ |
| int i; |
| |
| if(aspect.num==0 || aspect.den==0) aspect= (AVRational){1,1}; |
| |
| for(i=1; i<6; i++){ |
| if(av_cmp_q(ff_h263_pixel_aspect[i], aspect) == 0){ |
| return i; |
| } |
| } |
| |
| return FF_ASPECT_EXTENDED; |
| } |
| |
| void ff_h263_encode_picture_header(MpegEncContext * s, int picture_number) |
| { |
| int format, coded_frame_rate, coded_frame_rate_base, i, temp_ref; |
| int best_clock_code=1; |
| int best_divisor=60; |
| int best_error= INT_MAX; |
| |
| if(s->h263_plus){ |
| for(i=0; i<2; i++){ |
| int div, error; |
| div= (s->avctx->time_base.num*1800000LL + 500LL*s->avctx->time_base.den) / ((1000LL+i)*s->avctx->time_base.den); |
| div= av_clip(div, 1, 127); |
| error= FFABS(s->avctx->time_base.num*1800000LL - (1000LL+i)*s->avctx->time_base.den*div); |
| if(error < best_error){ |
| best_error= error; |
| best_divisor= div; |
| best_clock_code= i; |
| } |
| } |
| } |
| s->custom_pcf= best_clock_code!=1 || best_divisor!=60; |
| coded_frame_rate= 1800000; |
| coded_frame_rate_base= (1000+best_clock_code)*best_divisor; |
| |
| align_put_bits(&s->pb); |
| |
| /* Update the pointer to last GOB */ |
| s->ptr_lastgob = put_bits_ptr(&s->pb); |
| put_bits(&s->pb, 22, 0x20); /* PSC */ |
| temp_ref= s->picture_number * (int64_t)coded_frame_rate * s->avctx->time_base.num / //FIXME use timestamp |
| (coded_frame_rate_base * (int64_t)s->avctx->time_base.den); |
| put_sbits(&s->pb, 8, temp_ref); /* TemporalReference */ |
| |
| put_bits(&s->pb, 1, 1); /* marker */ |
| put_bits(&s->pb, 1, 0); /* H.263 id */ |
| put_bits(&s->pb, 1, 0); /* split screen off */ |
| put_bits(&s->pb, 1, 0); /* camera off */ |
| put_bits(&s->pb, 1, 0); /* freeze picture release off */ |
| |
| format = ff_match_2uint16(ff_h263_format, FF_ARRAY_ELEMS(ff_h263_format), s->width, s->height); |
| if (!s->h263_plus) { |
| /* H.263v1 */ |
| put_bits(&s->pb, 3, format); |
| put_bits(&s->pb, 1, (s->pict_type == AV_PICTURE_TYPE_P)); |
| /* By now UMV IS DISABLED ON H.263v1, since the restrictions |
| of H.263v1 UMV implies to check the predicted MV after |
| calculation of the current MB to see if we're on the limits */ |
| put_bits(&s->pb, 1, 0); /* Unrestricted Motion Vector: off */ |
| put_bits(&s->pb, 1, 0); /* SAC: off */ |
| put_bits(&s->pb, 1, s->obmc); /* Advanced Prediction */ |
| put_bits(&s->pb, 1, 0); /* only I/P-frames, no PB-frame */ |
| put_bits(&s->pb, 5, s->qscale); |
| put_bits(&s->pb, 1, 0); /* Continuous Presence Multipoint mode: off */ |
| } else { |
| int ufep=1; |
| /* H.263v2 */ |
| /* H.263 Plus PTYPE */ |
| |
| put_bits(&s->pb, 3, 7); |
| put_bits(&s->pb,3,ufep); /* Update Full Extended PTYPE */ |
| if (format == 8) |
| put_bits(&s->pb,3,6); /* Custom Source Format */ |
| else |
| put_bits(&s->pb, 3, format); |
| |
| put_bits(&s->pb,1, s->custom_pcf); |
| put_bits(&s->pb,1, s->umvplus); /* Unrestricted Motion Vector */ |
| put_bits(&s->pb,1,0); /* SAC: off */ |
| put_bits(&s->pb,1,s->obmc); /* Advanced Prediction Mode */ |
| put_bits(&s->pb,1,s->h263_aic); /* Advanced Intra Coding */ |
| put_bits(&s->pb,1,s->loop_filter); /* Deblocking Filter */ |
| put_bits(&s->pb,1,s->h263_slice_structured); /* Slice Structured */ |
| put_bits(&s->pb,1,0); /* Reference Picture Selection: off */ |
| put_bits(&s->pb,1,0); /* Independent Segment Decoding: off */ |
| put_bits(&s->pb,1,s->alt_inter_vlc); /* Alternative Inter VLC */ |
| put_bits(&s->pb,1,s->modified_quant); /* Modified Quantization: */ |
| put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */ |
| put_bits(&s->pb,3,0); /* Reserved */ |
| |
| put_bits(&s->pb, 3, s->pict_type == AV_PICTURE_TYPE_P); |
| |
| put_bits(&s->pb,1,0); /* Reference Picture Resampling: off */ |
| put_bits(&s->pb,1,0); /* Reduced-Resolution Update: off */ |
| put_bits(&s->pb,1,s->no_rounding); /* Rounding Type */ |
| put_bits(&s->pb,2,0); /* Reserved */ |
| put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */ |
| |
| /* This should be here if PLUSPTYPE */ |
| put_bits(&s->pb, 1, 0); /* Continuous Presence Multipoint mode: off */ |
| |
| if (format == 8) { |
| /* Custom Picture Format (CPFMT) */ |
| s->aspect_ratio_info= ff_h263_aspect_to_info(s->avctx->sample_aspect_ratio); |
| |
| put_bits(&s->pb,4,s->aspect_ratio_info); |
| put_bits(&s->pb,9,(s->width >> 2) - 1); |
| put_bits(&s->pb,1,1); /* "1" to prevent start code emulation */ |
| put_bits(&s->pb,9,(s->height >> 2)); |
| if (s->aspect_ratio_info == FF_ASPECT_EXTENDED){ |
| put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.num); |
| put_bits(&s->pb, 8, s->avctx->sample_aspect_ratio.den); |
| } |
| } |
| if(s->custom_pcf){ |
| if(ufep){ |
| put_bits(&s->pb, 1, best_clock_code); |
| put_bits(&s->pb, 7, best_divisor); |
| } |
| put_sbits(&s->pb, 2, temp_ref>>8); |
| } |
| |
| /* Unlimited Unrestricted Motion Vectors Indicator (UUI) */ |
| if (s->umvplus) |
| // put_bits(&s->pb,1,1); /* Limited according tables of Annex D */ |
| //FIXME check actual requested range |
| put_bits(&s->pb,2,1); /* unlimited */ |
| if(s->h263_slice_structured) |
| put_bits(&s->pb,2,0); /* no weird submodes */ |
| |
| put_bits(&s->pb, 5, s->qscale); |
| } |
| |
| put_bits(&s->pb, 1, 0); /* no PEI */ |
| |
| if(s->h263_slice_structured){ |
| put_bits(&s->pb, 1, 1); |
| |
| av_assert1(s->mb_x == 0 && s->mb_y == 0); |
| ff_h263_encode_mba(s); |
| |
| put_bits(&s->pb, 1, 1); |
| } |
| } |
| |
| /** |
| * Encode a group of blocks header. |
| */ |
| void ff_h263_encode_gob_header(MpegEncContext * s, int mb_line) |
| { |
| put_bits(&s->pb, 17, 1); /* GBSC */ |
| |
| if(s->h263_slice_structured){ |
| put_bits(&s->pb, 1, 1); |
| |
| ff_h263_encode_mba(s); |
| |
| if(s->mb_num > 1583) |
| put_bits(&s->pb, 1, 1); |
| put_bits(&s->pb, 5, s->qscale); /* GQUANT */ |
| put_bits(&s->pb, 1, 1); |
| put_bits(&s->pb, 2, s->pict_type == AV_PICTURE_TYPE_I); /* GFID */ |
| }else{ |
| int gob_number= mb_line / s->gob_index; |
| |
| put_bits(&s->pb, 5, gob_number); /* GN */ |
| put_bits(&s->pb, 2, s->pict_type == AV_PICTURE_TYPE_I); /* GFID */ |
| put_bits(&s->pb, 5, s->qscale); /* GQUANT */ |
| } |
| } |
| |
| /** |
| * modify qscale so that encoding is actually possible in H.263 (limit difference to -2..2) |
| */ |
| void ff_clean_h263_qscales(MpegEncContext *s){ |
| int i; |
| int8_t * const qscale_table = s->current_picture.qscale_table; |
| |
| ff_init_qscale_tab(s); |
| |
| for(i=1; i<s->mb_num; i++){ |
| if(qscale_table[ s->mb_index2xy[i] ] - qscale_table[ s->mb_index2xy[i-1] ] >2) |
| qscale_table[ s->mb_index2xy[i] ]= qscale_table[ s->mb_index2xy[i-1] ]+2; |
| } |
| for(i=s->mb_num-2; i>=0; i--){ |
| if(qscale_table[ s->mb_index2xy[i] ] - qscale_table[ s->mb_index2xy[i+1] ] >2) |
| qscale_table[ s->mb_index2xy[i] ]= qscale_table[ s->mb_index2xy[i+1] ]+2; |
| } |
| |
| if(s->codec_id != AV_CODEC_ID_H263P){ |
| for(i=1; i<s->mb_num; i++){ |
| int mb_xy= s->mb_index2xy[i]; |
| |
| if(qscale_table[mb_xy] != qscale_table[s->mb_index2xy[i-1]] && (s->mb_type[mb_xy]&CANDIDATE_MB_TYPE_INTER4V)){ |
| s->mb_type[mb_xy]|= CANDIDATE_MB_TYPE_INTER; |
| } |
| } |
| } |
| } |
| |
| static const int dquant_code[5]= {1,0,9,2,3}; |
| |
| /** |
| * Encode an 8x8 block. |
| * @param block the 8x8 block |
| * @param n block index (0-3 are luma, 4-5 are chroma) |
| */ |
| static void h263_encode_block(MpegEncContext * s, int16_t * block, int n) |
| { |
| int level, run, last, i, j, last_index, last_non_zero, sign, slevel, code; |
| RLTable *rl; |
| |
| rl = &ff_h263_rl_inter; |
| if (s->mb_intra && !s->h263_aic) { |
| /* DC coef */ |
| level = block[0]; |
| /* 255 cannot be represented, so we clamp */ |
| if (level > 254) { |
| level = 254; |
| block[0] = 254; |
| } |
| /* 0 cannot be represented also */ |
| else if (level < 1) { |
| level = 1; |
| block[0] = 1; |
| } |
| if (level == 128) //FIXME check rv10 |
| put_bits(&s->pb, 8, 0xff); |
| else |
| put_bits(&s->pb, 8, level); |
| i = 1; |
| } else { |
| i = 0; |
| if (s->h263_aic && s->mb_intra) |
| rl = &ff_rl_intra_aic; |
| |
| if(s->alt_inter_vlc && !s->mb_intra){ |
| int aic_vlc_bits=0; |
| int inter_vlc_bits=0; |
| int wrong_pos=-1; |
| int aic_code; |
| |
| last_index = s->block_last_index[n]; |
| last_non_zero = i - 1; |
| for (; i <= last_index; i++) { |
| j = s->intra_scantable.permutated[i]; |
| level = block[j]; |
| if (level) { |
| run = i - last_non_zero - 1; |
| last = (i == last_index); |
| |
| if(level<0) level= -level; |
| |
| code = get_rl_index(rl, last, run, level); |
| aic_code = get_rl_index(&ff_rl_intra_aic, last, run, level); |
| inter_vlc_bits += rl->table_vlc[code][1]+1; |
| aic_vlc_bits += ff_rl_intra_aic.table_vlc[aic_code][1]+1; |
| |
| if (code == rl->n) { |
| inter_vlc_bits += 1+6+8-1; |
| } |
| if (aic_code == ff_rl_intra_aic.n) { |
| aic_vlc_bits += 1+6+8-1; |
| wrong_pos += run + 1; |
| }else |
| wrong_pos += wrong_run[aic_code]; |
| last_non_zero = i; |
| } |
| } |
| i = 0; |
| if(aic_vlc_bits < inter_vlc_bits && wrong_pos > 63) |
| rl = &ff_rl_intra_aic; |
| } |
| } |
| |
| /* AC coefs */ |
| last_index = s->block_last_index[n]; |
| last_non_zero = i - 1; |
| for (; i <= last_index; i++) { |
| j = s->intra_scantable.permutated[i]; |
| level = block[j]; |
| if (level) { |
| run = i - last_non_zero - 1; |
| last = (i == last_index); |
| sign = 0; |
| slevel = level; |
| if (level < 0) { |
| sign = 1; |
| level = -level; |
| } |
| code = get_rl_index(rl, last, run, level); |
| put_bits(&s->pb, rl->table_vlc[code][1], rl->table_vlc[code][0]); |
| if (code == rl->n) { |
| if(!CONFIG_FLV_ENCODER || s->h263_flv <= 1){ |
| put_bits(&s->pb, 1, last); |
| put_bits(&s->pb, 6, run); |
| |
| av_assert2(slevel != 0); |
| |
| if(level < 128) |
| put_sbits(&s->pb, 8, slevel); |
| else{ |
| put_bits(&s->pb, 8, 128); |
| put_sbits(&s->pb, 5, slevel); |
| put_sbits(&s->pb, 6, slevel>>5); |
| } |
| }else{ |
| ff_flv2_encode_ac_esc(&s->pb, slevel, level, run, last); |
| } |
| } else { |
| put_bits(&s->pb, 1, sign); |
| } |
| last_non_zero = i; |
| } |
| } |
| } |
| |
| /* Encode MV differences on H.263+ with Unrestricted MV mode */ |
| static void h263p_encode_umotion(PutBitContext *pb, int val) |
| { |
| short sval = 0; |
| short i = 0; |
| short n_bits = 0; |
| short temp_val; |
| int code = 0; |
| int tcode; |
| |
| if ( val == 0) |
| put_bits(pb, 1, 1); |
| else if (val == 1) |
| put_bits(pb, 3, 0); |
| else if (val == -1) |
| put_bits(pb, 3, 2); |
| else { |
| |
| sval = ((val < 0) ? (short)(-val):(short)val); |
| temp_val = sval; |
| |
| while (temp_val != 0) { |
| temp_val = temp_val >> 1; |
| n_bits++; |
| } |
| |
| i = n_bits - 1; |
| while (i > 0) { |
| tcode = (sval & (1 << (i-1))) >> (i-1); |
| tcode = (tcode << 1) | 1; |
| code = (code << 2) | tcode; |
| i--; |
| } |
| code = ((code << 1) | (val < 0)) << 1; |
| put_bits(pb, (2*n_bits)+1, code); |
| } |
| } |
| |
| void ff_h263_encode_mb(MpegEncContext * s, |
| int16_t block[6][64], |
| int motion_x, int motion_y) |
| { |
| int cbpc, cbpy, i, cbp, pred_x, pred_y; |
| int16_t pred_dc; |
| int16_t rec_intradc[6]; |
| int16_t *dc_ptr[6]; |
| const int interleaved_stats = s->avctx->flags & AV_CODEC_FLAG_PASS1; |
| |
| if (!s->mb_intra) { |
| /* compute cbp */ |
| cbp= get_p_cbp(s, block, motion_x, motion_y); |
| |
| if ((cbp | motion_x | motion_y | s->dquant | (s->mv_type - MV_TYPE_16X16)) == 0) { |
| /* skip macroblock */ |
| put_bits(&s->pb, 1, 1); |
| if(interleaved_stats){ |
| s->misc_bits++; |
| s->last_bits++; |
| } |
| s->skip_count++; |
| |
| return; |
| } |
| put_bits(&s->pb, 1, 0); /* mb coded */ |
| |
| cbpc = cbp & 3; |
| cbpy = cbp >> 2; |
| if(s->alt_inter_vlc==0 || cbpc!=3) |
| cbpy ^= 0xF; |
| if(s->dquant) cbpc+= 8; |
| if(s->mv_type==MV_TYPE_16X16){ |
| put_bits(&s->pb, |
| ff_h263_inter_MCBPC_bits[cbpc], |
| ff_h263_inter_MCBPC_code[cbpc]); |
| |
| put_bits(&s->pb, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); |
| if(s->dquant) |
| put_bits(&s->pb, 2, dquant_code[s->dquant+2]); |
| |
| if(interleaved_stats){ |
| s->misc_bits+= get_bits_diff(s); |
| } |
| |
| /* motion vectors: 16x16 mode */ |
| ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); |
| |
| if (!s->umvplus) { |
| ff_h263_encode_motion_vector(s, motion_x - pred_x, |
| motion_y - pred_y, 1); |
| } |
| else { |
| h263p_encode_umotion(&s->pb, motion_x - pred_x); |
| h263p_encode_umotion(&s->pb, motion_y - pred_y); |
| if (((motion_x - pred_x) == 1) && ((motion_y - pred_y) == 1)) |
| /* To prevent Start Code emulation */ |
| put_bits(&s->pb,1,1); |
| } |
| }else{ |
| put_bits(&s->pb, |
| ff_h263_inter_MCBPC_bits[cbpc+16], |
| ff_h263_inter_MCBPC_code[cbpc+16]); |
| put_bits(&s->pb, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); |
| if(s->dquant) |
| put_bits(&s->pb, 2, dquant_code[s->dquant+2]); |
| |
| if(interleaved_stats){ |
| s->misc_bits+= get_bits_diff(s); |
| } |
| |
| for(i=0; i<4; i++){ |
| /* motion vectors: 8x8 mode*/ |
| ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y); |
| |
| motion_x = s->current_picture.motion_val[0][s->block_index[i]][0]; |
| motion_y = s->current_picture.motion_val[0][s->block_index[i]][1]; |
| if (!s->umvplus) { |
| ff_h263_encode_motion_vector(s, motion_x - pred_x, |
| motion_y - pred_y, 1); |
| } |
| else { |
| h263p_encode_umotion(&s->pb, motion_x - pred_x); |
| h263p_encode_umotion(&s->pb, motion_y - pred_y); |
| if (((motion_x - pred_x) == 1) && ((motion_y - pred_y) == 1)) |
| /* To prevent Start Code emulation */ |
| put_bits(&s->pb,1,1); |
| } |
| } |
| } |
| |
| if(interleaved_stats){ |
| s->mv_bits+= get_bits_diff(s); |
| } |
| } else { |
| av_assert2(s->mb_intra); |
| |
| cbp = 0; |
| if (s->h263_aic) { |
| /* Predict DC */ |
| for(i=0; i<6; i++) { |
| int16_t level = block[i][0]; |
| int scale; |
| |
| if(i<4) scale= s->y_dc_scale; |
| else scale= s->c_dc_scale; |
| |
| pred_dc = ff_h263_pred_dc(s, i, &dc_ptr[i]); |
| level -= pred_dc; |
| /* Quant */ |
| if (level >= 0) |
| level = (level + (scale>>1))/scale; |
| else |
| level = (level - (scale>>1))/scale; |
| |
| if(!s->modified_quant){ |
| if (level < -127) |
| level = -127; |
| else if (level > 127) |
| level = 127; |
| } |
| |
| block[i][0] = level; |
| /* Reconstruction */ |
| rec_intradc[i] = scale*level + pred_dc; |
| /* Oddify */ |
| rec_intradc[i] |= 1; |
| //if ((rec_intradc[i] % 2) == 0) |
| // rec_intradc[i]++; |
| /* Clipping */ |
| if (rec_intradc[i] < 0) |
| rec_intradc[i] = 0; |
| else if (rec_intradc[i] > 2047) |
| rec_intradc[i] = 2047; |
| |
| /* Update AC/DC tables */ |
| *dc_ptr[i] = rec_intradc[i]; |
| /* AIC can change CBP */ |
| if (s->block_last_index[i] > 0 || |
| (s->block_last_index[i] == 0 && level !=0)) |
| cbp |= 1 << (5 - i); |
| } |
| }else{ |
| for(i=0; i<6; i++) { |
| /* compute cbp */ |
| if (s->block_last_index[i] >= 1) |
| cbp |= 1 << (5 - i); |
| } |
| } |
| |
| cbpc = cbp & 3; |
| if (s->pict_type == AV_PICTURE_TYPE_I) { |
| if(s->dquant) cbpc+=4; |
| put_bits(&s->pb, |
| ff_h263_intra_MCBPC_bits[cbpc], |
| ff_h263_intra_MCBPC_code[cbpc]); |
| } else { |
| if(s->dquant) cbpc+=8; |
| put_bits(&s->pb, 1, 0); /* mb coded */ |
| put_bits(&s->pb, |
| ff_h263_inter_MCBPC_bits[cbpc + 4], |
| ff_h263_inter_MCBPC_code[cbpc + 4]); |
| } |
| if (s->h263_aic) { |
| /* XXX: currently, we do not try to use ac prediction */ |
| put_bits(&s->pb, 1, 0); /* no AC prediction */ |
| } |
| cbpy = cbp >> 2; |
| put_bits(&s->pb, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); |
| if(s->dquant) |
| put_bits(&s->pb, 2, dquant_code[s->dquant+2]); |
| |
| if(interleaved_stats){ |
| s->misc_bits+= get_bits_diff(s); |
| } |
| } |
| |
| for(i=0; i<6; i++) { |
| /* encode each block */ |
| h263_encode_block(s, block[i], i); |
| |
| /* Update INTRADC for decoding */ |
| if (s->h263_aic && s->mb_intra) { |
| block[i][0] = rec_intradc[i]; |
| |
| } |
| } |
| |
| if(interleaved_stats){ |
| if (!s->mb_intra) { |
| s->p_tex_bits+= get_bits_diff(s); |
| s->f_count++; |
| }else{ |
| s->i_tex_bits+= get_bits_diff(s); |
| s->i_count++; |
| } |
| } |
| } |
| |
| void ff_h263_encode_motion(PutBitContext *pb, int val, int f_code) |
| { |
| int range, bit_size, sign, code, bits; |
| |
| if (val == 0) { |
| /* zero vector */ |
| code = 0; |
| put_bits(pb, ff_mvtab[code][1], ff_mvtab[code][0]); |
| } else { |
| bit_size = f_code - 1; |
| range = 1 << bit_size; |
| /* modulo encoding */ |
| val = sign_extend(val, 6 + bit_size); |
| sign = val>>31; |
| val= (val^sign)-sign; |
| sign&=1; |
| |
| val--; |
| code = (val >> bit_size) + 1; |
| bits = val & (range - 1); |
| |
| put_bits(pb, ff_mvtab[code][1] + 1, (ff_mvtab[code][0] << 1) | sign); |
| if (bit_size > 0) { |
| put_bits(pb, bit_size, bits); |
| } |
| } |
| } |
| |
| static av_cold void init_mv_penalty_and_fcode(MpegEncContext *s) |
| { |
| int f_code; |
| int mv; |
| |
| for(f_code=1; f_code<=MAX_FCODE; f_code++){ |
| for(mv=-MAX_DMV; mv<=MAX_DMV; mv++){ |
| int len; |
| |
| if(mv==0) len= ff_mvtab[0][1]; |
| else{ |
| int val, bit_size, code; |
| |
| bit_size = f_code - 1; |
| |
| val=mv; |
| if (val < 0) |
| val = -val; |
| val--; |
| code = (val >> bit_size) + 1; |
| if(code<33){ |
| len= ff_mvtab[code][1] + 1 + bit_size; |
| }else{ |
| len= ff_mvtab[32][1] + av_log2(code>>5) + 2 + bit_size; |
| } |
| } |
| |
| mv_penalty[f_code][mv+MAX_DMV]= len; |
| } |
| } |
| |
| for(f_code=MAX_FCODE; f_code>0; f_code--){ |
| for(mv=-(16<<f_code); mv<(16<<f_code); mv++){ |
| fcode_tab[mv+MAX_MV]= f_code; |
| } |
| } |
| |
| for(mv=0; mv<MAX_MV*2+1; mv++){ |
| umv_fcode_tab[mv]= 1; |
| } |
| } |
| |
| static av_cold void init_uni_h263_rl_tab(RLTable *rl, uint32_t *bits_tab, |
| uint8_t *len_tab) |
| { |
| int slevel, run, last; |
| |
| av_assert0(MAX_LEVEL >= 64); |
| av_assert0(MAX_RUN >= 63); |
| |
| for(slevel=-64; slevel<64; slevel++){ |
| if(slevel==0) continue; |
| for(run=0; run<64; run++){ |
| for(last=0; last<=1; last++){ |
| const int index= UNI_MPEG4_ENC_INDEX(last, run, slevel+64); |
| int level= slevel < 0 ? -slevel : slevel; |
| int sign= slevel < 0 ? 1 : 0; |
| int bits, len, code; |
| |
| len_tab[index]= 100; |
| |
| /* ESC0 */ |
| code= get_rl_index(rl, last, run, level); |
| bits= rl->table_vlc[code][0]; |
| len= rl->table_vlc[code][1]; |
| bits=bits*2+sign; len++; |
| |
| if(code!=rl->n && len < len_tab[index]){ |
| if(bits_tab) bits_tab[index]= bits; |
| len_tab [index]= len; |
| } |
| /* ESC */ |
| bits= rl->table_vlc[rl->n][0]; |
| len = rl->table_vlc[rl->n][1]; |
| bits=bits*2+last; len++; |
| bits=bits*64+run; len+=6; |
| bits=bits*256+(level&0xff); len+=8; |
| |
| if(len < len_tab[index]){ |
| if(bits_tab) bits_tab[index]= bits; |
| len_tab [index]= len; |
| } |
| } |
| } |
| } |
| } |
| |
| av_cold void ff_h263_encode_init(MpegEncContext *s) |
| { |
| static int done = 0; |
| |
| if (!done) { |
| done = 1; |
| |
| ff_rl_init(&ff_h263_rl_inter, ff_h263_static_rl_table_store[0]); |
| ff_rl_init(&ff_rl_intra_aic, ff_h263_static_rl_table_store[1]); |
| |
| init_uni_h263_rl_tab(&ff_rl_intra_aic, NULL, uni_h263_intra_aic_rl_len); |
| init_uni_h263_rl_tab(&ff_h263_rl_inter , NULL, uni_h263_inter_rl_len); |
| |
| init_mv_penalty_and_fcode(s); |
| } |
| s->me.mv_penalty= mv_penalty; // FIXME exact table for MSMPEG4 & H.263+ |
| |
| s->intra_ac_vlc_length =s->inter_ac_vlc_length = uni_h263_inter_rl_len; |
| s->intra_ac_vlc_last_length=s->inter_ac_vlc_last_length= uni_h263_inter_rl_len + 128*64; |
| if(s->h263_aic){ |
| s->intra_ac_vlc_length = uni_h263_intra_aic_rl_len; |
| s->intra_ac_vlc_last_length= uni_h263_intra_aic_rl_len + 128*64; |
| } |
| s->ac_esc_length= 7+1+6+8; |
| |
| // use fcodes >1 only for MPEG-4 & H.263 & H.263+ FIXME |
| switch(s->codec_id){ |
| case AV_CODEC_ID_MPEG4: |
| s->fcode_tab= fcode_tab; |
| break; |
| case AV_CODEC_ID_H263P: |
| if(s->umvplus) |
| s->fcode_tab= umv_fcode_tab; |
| if(s->modified_quant){ |
| s->min_qcoeff= -2047; |
| s->max_qcoeff= 2047; |
| }else{ |
| s->min_qcoeff= -127; |
| s->max_qcoeff= 127; |
| } |
| break; |
| // Note for MPEG-4 & H.263 the dc-scale table will be set per frame as needed later |
| case AV_CODEC_ID_FLV1: |
| if (s->h263_flv > 1) { |
| s->min_qcoeff= -1023; |
| s->max_qcoeff= 1023; |
| } else { |
| s->min_qcoeff= -127; |
| s->max_qcoeff= 127; |
| } |
| break; |
| default: //nothing needed - default table already set in mpegvideo.c |
| s->min_qcoeff= -127; |
| s->max_qcoeff= 127; |
| } |
| if(s->h263_aic){ |
| s->y_dc_scale_table= |
| s->c_dc_scale_table= ff_aic_dc_scale_table; |
| }else{ |
| s->y_dc_scale_table= |
| s->c_dc_scale_table= ff_mpeg1_dc_scale_table; |
| } |
| } |
| |
| void ff_h263_encode_mba(MpegEncContext *s) |
| { |
| int i, mb_pos; |
| |
| for(i=0; i<6; i++){ |
| if(s->mb_num-1 <= ff_mba_max[i]) break; |
| } |
| mb_pos= s->mb_x + s->mb_width*s->mb_y; |
| put_bits(&s->pb, ff_mba_length[i], mb_pos); |
| } |
